Chicken cloaca dosing device

Abstract

The invention discloses a chicken cloaca dosing device, and belongs to the technical field of animal medicine equipment. In order to solve the problems that an existing dosing device needs to be matched by two persons and is difficult to adapt to cloaca structure differences of chickens of different day ages, the device comprises a container for containing liquid medicine and a cover, an integrally-formed handle and a pressurizing structure communicated with the interior of the container are arranged on the cover, and a rigid liquid medicine conveying pipe penetrates through a mounting hole in the cover and extends to the bottom of the container. A liquid outlet of the switch valve is connected with a flexible liquid medicine guide pipe; the tail end of the guide pipe is provided with an inserting pipe with an annular clamping groove; the inner wall of the rear end of the conical-tube-shaped spraying gun head is provided with an annular bulge matched with the annular clamping groove; the top of the cover is also provided with an electronic timer, and the control end of the electronic timer is connected with an electromagnetic driving mechanism in the switch valve; the timing module is used for timing when the switch valve is triggered and powering off to close the valve when a preset threshold value is reached. The device is used for feeding medicine to the cloaca of the chicken, can be operated by a single person and is matched with physiological structures of chickens of different day ages.

Description

Technical Field

[0001] This invention belongs to the field of animal medical equipment technology, specifically relating to a chicken cloacal drug delivery device. Background Technology

[0002] In large-scale chicken farming, cloacal drug delivery is a method that bypasses the first-pass effect of the liver and reduces gastrointestinal irritation. Existing technologies disclose methods for cloacal drug delivery using plastic spray bottles; however, in practice, this method typically requires two people: one to open the cloaca and the other to spray the medication into the cloaca, making single-person operation difficult. Furthermore, chickens of different ages exhibit significant differences in cloacal depth and diameter, while existing drug delivery devices have a simple spray component structure that cannot be adjusted according to the chicken's age. This results in inaccurate delivery of medication to the target site, leading to low delivery efficiency and potential damage to the cloacal mucosa due to improper spray depth or angle. During research and development, a key technical challenge is how to ensure single-person operability while adapting the drug delivery device to the physiological differences in chickens of different ages and avoiding damage caused by improper operation. Summary of the Invention

[0003] One object of the present invention is to solve at least the above-mentioned problems and to provide at least the advantages that will be described later.

[0004] Another objective of this invention is to provide a cloacal drug delivery device for chickens, which can be operated with one hand through a pressurization structure, and can be matched with the cloacal structure of chickens of different ages by changing various sizes of spray gun heads, so as to ensure accurate drug delivery and avoid damage.

[0005] To achieve these objectives and other advantages of the present invention, a cloacal drug delivery device for chickens is provided, comprising a container for containing a drug solution and a lid that covers the container, and further comprising: The handle is located on the cover, and the handle and the cover are a single molded plastic component; A pressurization structure, which is connected to the interior of the container, is used to increase the pressure inside the container; The spraying structure includes a liquid delivery pipe, a press-type spray switch valve, a liquid delivery conduit, and a spray nozzle assembly. The central area of ​​the cover has a through-hole. The liquid delivery pipe is a rigid pipe that passes through the mounting hole and extends to the bottom of the container. The upper end of the liquid delivery pipe protrudes from the cover and is connected to the press-type spray switch valve. The outlet of the press-type spray switch valve is connected to a flexible liquid delivery conduit. The end of the liquid delivery conduit is fixedly connected to a rigid insertion pipe, and the outer wall of the insertion pipe is provided with an annular groove. The spray gun head is a conical tube with a small front end and a large rear end. The inner wall of the rear opening of the spray gun head is provided with an annular protrusion that matches the annular groove so that the spray gun head and the insertion tube can be detachably fixed. An electronic timer is fixedly installed on the top of the cover. The control terminal of the electronic timer is connected to the electromagnetic drive mechanism inside the push-button injection switch valve via a signal line. The electronic timer is used to start timing when the push-button injection switch valve is triggered, and to send a power-off signal to the electromagnetic drive mechanism when the total effective injection time reaches a preset threshold, so that the push-button injection switch valve is closed. The electronic timer can provide auxiliary control over the opening and closing state of the push-button injection switch valve according to preset logic.

[0006] In large-scale chicken farming, while cloacal drug administration offers advantages such as avoiding the first-pass effect in the liver and reducing drug irritation, existing methods typically require two people: one to open the cloaca and the other to hold the spray bottle and apply the medication. This is inconvenient and labor-intensive. Furthermore, the depth and diameter of the cloaca vary significantly among chickens of different ages, and the fixed structure of the spray components in existing devices prevents adjustments based on age, leading to inaccurate delivery of the medication to the target area. This not only results in low drug administration efficiency but also increases the risk of damage to the cloacal mucosa due to excessive spraying or improper angles. To address these issues, this device features an integrated handle on the lid and a pressurization structure connected to the container's interior. This allows the operator to hold the device with one hand and pre-charge the container with compressed air, providing a stable power source for spraying and completely changing the previous two-person operation mode. Meanwhile, the device is equipped with a detachable and replaceable conical spray nozzle. Its rear end allows for quick assembly and disassembly via an annular protrusion and a ring-shaped groove on the insertion tube, enabling farmers to select different nozzle sizes based on the chickens' age, ensuring precise matching of spray depth to the cloacal physiological structure. The nozzle's front end is closed and hemispherical, with multiple micro-holes evenly distributed on the front and side walls. During spraying, the medication can cover the cloacal mucosa from multiple angles and in all directions, avoiding localized overdose or leakage caused by single-point spraying. Furthermore, the introduction of an electronic timer automatically starts timing when the push-button spray valve is triggered. When the total effective spraying time reaches a preset threshold (e.g., 0.5 seconds or 1 second depending on age), the power to the electromagnetic drive mechanism is automatically cut off, closing the valve. This precisely controls the single-dose dosage, preventing overdose or excessive spraying time due to operator inexperience or misjudgment. Through the synergistic effect of the above structures, this device not only enables a single person to independently complete the cloacal drug delivery operation, significantly improving work efficiency, but more importantly, it can flexibly adjust the spray depth and dosage according to the physiological characteristics of chickens of different ages, minimizing mechanical damage to the cloaca while ensuring that the drug solution evenly covers the mucosal surface, thereby improving the absorption and utilization rate of the drug.

[0007] Preferably, the pressurizing structure includes a cylindrical guide sleeve mounted on the cover, a pressurizing rod that can reciprocate and slide through the guide sleeve, and a rubber piston fixedly connected to one end of the pressurizing rod located inside the guide sleeve. The outer edge of the rubber piston is tightly fitted to the inner wall of the guide sleeve. An air inlet is provided on the side wall of the guide sleeve near the cover. A one-way valve is provided at the bottom of the guide sleeve, which allows gas to enter the container from the guide sleeve but prevents gas or liquid in the container from flowing back into the guide sleeve. The pressurizing rod, guide sleeve, rubber piston, and one-way valve together constitute a manual air pump structure.

[0008] The pressurization structure employs a design similar to a manual air pump. A cylindrical guide sleeve is mounted on the cover, and a pressurization rod slides reciprocally through the sleeve. A rubber piston, tightly fitted to the inner wall of the guide sleeve, is fixed to the end of the rod. An air inlet is located on the side wall of the guide sleeve near the cover, and a one-way valve at its bottom allows only one-way gas entry into the container. When the operator pushes and pulls the pressurization rod back and forth, the rubber piston moves within the guide sleeve, drawing in and compressing external air through the air inlet. This compressed air is then forced into the container through the one-way valve, establishing a stable compressed air reserve within the container. This mechanical pressurization method requires no external power source. The one-way valve effectively prevents liquid or gas from flowing back into the guide sleeve during the pressurization interval, ensuring continuous and stable pressure. This structure allows the operator to easily provide sufficient and sustained spray power to the device, ensuring smooth spraying of the liquid at adequate pressure, while avoiding the cost and maintenance issues associated with complex electric pumps or external air sources.

[0009] Preferably, the spray gun head is integrally injection molded from medical-grade polypropylene material. The spray gun head has the following 5 specifications: a spray gun head with a length of 3mm has a bottom diameter of 1mm; a spray gun head with a length of 5mm has a bottom diameter of 1.5mm; a spray gun head with a length of 7mm has a bottom diameter of 2mm; a spray gun head with a length of 10mm has a bottom diameter of 2mm; and a spray gun head with a length of 15mm has a bottom diameter of 2.5mm.

[0010] Chickens of different ages exhibit significant differences in the depth and diameter of their cloaca. If the spray nozzle specifications are uniform and fixed, it becomes difficult to achieve precise matching across different growth stages. For example, using a nozzle that is too long for chicks can easily puncture the mucous membrane, while using a nozzle that is too short for adult chickens will prevent the medication from reaching the deep intestines, leading to spillage or poor absorption. To address this practical need, the spray nozzle is integrally injection molded from medical-grade polypropylene material and is available in five different specifications. The 3mm long nozzle has a 1mm bottom diameter and is suitable for younger chicks; the 5mm long nozzle has a 1.5mm bottom diameter and meets the needs of medium-aged chickens; the 7mm and 10mm long nozzles both have a 2mm bottom diameter and are suitable for medium and large chickens at different stages; the 15mm long nozzle has a 2.5mm bottom diameter and is specifically designed for older adult chickens. By providing this series of nozzles with clearly defined size gradients, farmers can quickly select the most suitable size based on the chickens' actual age and body size. This ensures that the nozzle is inserted precisely into the cloaca at the appropriate depth during spraying, preventing tissue damage due to excessive length or insufficient absorption due to insufficient length. The use of medical-grade polypropylene material guarantees good biocompatibility and sufficient rigidity for easy insertion, while the one-piece injection molding process results in a smooth inner wall and precise dimensions, reducing production costs and batch-to-batch variations. This standardized nozzle configuration allows the same drug delivery system to be used throughout the entire growth cycle of chickens, enabling safe and effective cloacal drug delivery at different ages.

[0011] Preferably, the front end of the spray gun head is closed and hemispherical, and multiple microholes with a diameter of 0.3-0.5 mm are opened on the hemispherical area at the front end of the spray gun head and on the side wall near the front end, and the multiple microholes are evenly distributed.

[0012] During cloacal drug administration, if the nozzle's outlet is only located at the front, the medication tends to spray out in a straight, unidirectional line. This can lead to uneven drug distribution and, due to excessive impact, discomfort or avoidance in the chickens, hindering the procedure. To address this issue, the nozzle's front end features a closed hemispherical design with multiple micro-holes (0.3-0.5 mm in diameter) evenly distributed throughout the hemispherical area and on the sidewalls near the front. The smooth, rounded hemispherical front end effectively reduces friction and irritation to the mucous membrane when inserted into the cloaca, minimizing stress in the chickens. When the medication is sprayed simultaneously from multiple micro-holes under pressure, it is no longer confined to a single direction but forms a multi-angle, multi-layered diffused spray within the cloaca, ensuring even coverage of the mucous membrane surface and preventing excessive or missed areas. The micropore diameter is controlled within the range of 0.3-0.5 mm, ensuring that the medication is sprayed out with appropriate atomization while avoiding excessively large pores that would cause the medication to flow out in streams or excessively small pores that would cause blockages. This structural design significantly increases the contact area between the medication and the cloacal mucosa, resulting in more complete drug absorption. At the same time, the dispersed spray pattern reduces the single-point impact on the mucosa, further improving the safety and comfort of the drug administration process.

[0013] Preferably, the preset threshold under the basic state is set to 0.5 seconds or 1 second according to the age of the chicken, with 0.5 seconds preset for chickens under 42 days old and 1 second preset for chickens 42 days old and above.

[0014] Chickens of different ages exhibit significant differences in cloacal volume and medication requirements. Chicks have smaller cloacal spaces and more delicate mucous membranes, requiring less medication, while adult chickens require a relatively larger dosage to achieve an effective therapeutic concentration. If a uniform, fixed spray duration is used, it becomes difficult to accommodate the medication needs of different growth stages. Chicks are prone to excessive medication spillage or even mucosal damage due to prolonged spraying, while adult chickens may suffer from insufficient dosage due to insufficient spraying, affecting treatment efficacy. To address this issue, the basic preset threshold of the electronic timer is set differently based on the chicken's age. For chickens under 42 days old, the preset total spray duration is 0.5 seconds to accommodate their smaller cloacal volume and need for smaller amounts of medication; for chickens 42 days old and older, the preset total spray duration is 1 second to accommodate their larger cloacal volume and need for a sufficient amount of medication. This age-based threshold setting eliminates the need for complex calculations or manual adjustments when dealing with chickens at different growth stages. The device's preset logic automatically matches the appropriate spray duration. This simple two-stage setting ensures the safety of medication administration to chicks, avoiding irritation or damage caused by over-spraying, while also ensuring that adult chickens receive a sufficient dose of medication to fully cover the mucous membranes and exert their therapeutic effect, thus achieving a balance between safety and effectiveness.

[0015] Preferably, the electronic timer is also connected to a pressure monitoring module, which includes a pressure sensor disposed on the inner wall of the container and a comparator electrically connected to the pressure sensor. The comparator is preset with a first pressure threshold and a second pressure threshold. The first pressure threshold corresponds to the minimum pressure required to start the jet, and the second pressure threshold corresponds to the maximum pressure to prevent damage to the cloaca. The pressure sensor is used to collect the current pressure value inside the container in real time and send the current pressure value to the comparator; The comparator is used to compare the current pressure value with a first pressure threshold and a second pressure threshold. When the push-button injection switch valve is triggered, the electronic timer starts timing, and the pressure monitoring module starts monitoring the pressure at the same time. If the comparator determines that the current pressure value is lower than the first pressure threshold during the timing process, the comparator sends an interrupt signal to the electronic timer. The electronic timer responds to the interrupt signal by pausing the timing and simultaneously sends a power-off signal to the electromagnetic drive mechanism in the push-button injection switch valve, causing the push-button injection switch valve to close. The electronic timer automatically resumes timing and restores the push-button injection switch valve to the open state when the operator pressurizes the pressure again through the pressurization structure to raise the current pressure value back above the first pressure threshold and the push-button injection switch valve remains in the triggered state. If the comparator determines that the current pressure value is higher than the second pressure threshold during the timing process, the comparator sends a pressure limiting signal to the electronic timer. In response to the pressure limiting signal, the electronic timer controls the push-button injection switch valve to open intermittently in a pulse manner. The duration of each opening is 0.1 to 0.2 seconds, and the interval between two adjacent openings is 0.3 to 0.5 seconds. The continuous injection state is restored when the current pressure value falls below the second pressure threshold and the total effective injection time has not reached the preset threshold.

[0016] During the manual pressurization process of pre-filling the container with compressed air, it is difficult for the operator to maintain precise consistency in the force and number of times the pressurization lever is pushed and pulled, resulting in frequent fluctuations in the actual pressure inside the container. When the pressure is insufficient, the liquid medication cannot obtain enough propulsion, and the sprayed medication often appears as droplets rather than a fine mist, making it difficult to evenly adhere to the cloacal mucosa surface, and may even interrupt the flow midway, causing interruption of medication or insufficient dosage. Conversely, when the pressure is too high, the impact force of the liquid medication spray will be significantly enhanced, and the high-speed jet will directly act on the delicate cloacal mucosa, easily causing mucosal congestion and damage, resulting in unnecessary injury to the chickens. To address the inherent pressure instability of the manual pressurization method, a pressure monitoring module is introduced into the device. A pressure sensor installed on the inner wall of the container collects the current pressure value in real time, and a comparator electrically connected to it dynamically compares this value with a preset first pressure threshold and a second pressure threshold. The first pressure threshold corresponds to the minimum pressure required to maintain normal atomized spraying, while the second pressure threshold corresponds to the highest critical pressure that may cause damage to the cloaca. When the operator triggers the push-button spray valve to begin medication administration, the electronic timer starts timing, and the pressure monitoring module begins real-time monitoring. If the pressure drops below the first pressure threshold during spraying, the comparator immediately sends an interrupt signal to the electronic timer. The electronic timer then cuts off the power to the electromagnetic drive mechanism, closing the valve and pausing the timing until the operator restores the pressure to the normal range using the pressurization structure, and the valve remains in the triggered state. At this point, the system automatically resumes timing and reopens the valve, ensuring that each spray is performed under sufficient pressure and avoiding medication failure due to insufficient pressure. If the pressure rises above the second pressure threshold during spraying, the comparator sends a pressure limiting signal. Upon response, the electronic timer controls the valve to enter a pulsed intermittent opening mode, opening for 0.1-0.2 seconds each time with an interval of 0.3-0.5 seconds. This intermittent spraying method disperses the amount of medication sprayed in a single application, reducing the instantaneous impact on the mucous membrane and allowing the sprayed medication to diffuse and be initially absorbed within the cloaca during the short intervals. Once the pressure returns to a safe range, the system automatically resumes continuous spraying. Through this real-time monitoring and dynamic adjustment mechanism, no matter how the operator's pressurization intensity fluctuates, the device can always control the injection pressure within a safe range that ensures both atomization effect and avoids damage. At the same time, the automatic adjustment in pulse mode ensures the continuity of the drug delivery process, effectively compensating for the inherent defects of unstable pressure under manual pressurization mode. This improves the safety and comfort of drug delivery, while also ensuring the accuracy and reliability of drug delivery.

[0017] Preferably, it also includes a haptic feedback module electrically connected to the electronic timer; The tactile feedback module includes a miniature vibration motor disposed inside or on the surface of the handle; The electronic timer has at least two different vibration modes preset within it, each vibration mode corresponding to a specific operating state of the drug delivery device, the specific operating state including: The first working state is the normal working state in which the push-type injection switch valve is normally open and the pressure monitoring module determines that the current pressure value is between the first pressure threshold and the second pressure threshold. The second working state is a pressure-limiting pulse injection state in which the electronic timer controls the push-type injection switch valve to open intermittently in a pulse manner when the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold. And the third working state, which is the underpressure pause state in which the press-type injection switch valve is closed when the pressure monitoring module determines that the current pressure value is lower than the first pressure threshold; When the drug delivery device enters the first working state, the electronic timer controls the micro vibration motor to vibrate continuously at a first preset frequency and amplitude; When the drug delivery device enters the second working state, the electronic timer controls the micro vibration motor to perform intermittent pulse vibration at a second preset frequency and amplitude, and the pulse frequency is related to the intermittent opening frequency of the press-type injection switch valve. When the drug delivery device enters the third working state, the electronic timer controls the micro vibration motor to emit intermittent, suggestive vibration alarms at a third preset frequency and amplitude.

[0018] In single-person operation environments, the environment is often noisy. Ventilation equipment and chicken calls often mask the subtle sounds of the device operating. Simultaneously, the operator's gaze must be focused on the chicken's cloaca and the spraying operation, making it difficult to notice indicator lights or pressure gauges. When the device automatically switches to pulse spray mode due to excessive pressure or automatically pauses administration due to insufficient pressure, the operator often cannot promptly perceive these changes in internal operating status. For example, in pulse mode, the operator may mistakenly believe the device is still spraying normally, failing to realize that the amount of medication sprayed in a single burst has been dispersed. If operation is stopped at the normal pace, the actual dosage may be insufficient. In the low-pressure pause state, the operator may not notice the spraying has been interrupted, still waiting for the medication to spray out, causing operational pauses or repeated ineffective actions, or even misjudging the administration as complete and prematurely withdrawing the spray nozzle. To address these information blind spots in human-machine interaction, the device incorporates a miniature vibration motor electrically connected to an electronic timer inside or on the handle. Through preset vibration modes, the device's internal operating status is converted into tactile signals that the operator can clearly perceive with their hand. When the device is in the first working state of normal pressure and continuous spraying, the micro vibration motor vibrates continuously at the first preset frequency and amplitude, allowing the operator to feel a stable sense of "everything is normal" through the palm of their hand. When the pressure is too high and the device enters the second working state of pulse spraying, the motor vibrates pulsedly at the second preset frequency and amplitude, which is related to the intermittent opening frequency of the valve. This allows the operator to clearly perceive the rhythmic prompt of "currently in pulse mode," thus understanding that the liquid is being sprayed intermittently and avoiding blindly increasing the pressure or moving the gun prematurely due to the mistaken belief that the spraying is abnormal. When the pressure is insufficient and the device enters the third working state of underpressure pause, the motor emits an intermittent prompting vibration alarm at the third preset frequency and amplitude, making the operator immediately aware that "pressure needs to be increased," and thus promptly pulling the pressure booster lever. Once the pressure is restored, the device will automatically continue administering the medication. Through this tactile feedback mechanism, the complex pressure changes and working mode switching inside the device are transformed into clear signals that can be directly perceived by the human hand. The operator does not need to be distracted by observation or listening; they can grasp the status of the device in real time and make corresponding operations simply by holding the device and feeling it. This achieves intuitive and efficient human-computer interaction in noisy breeding environments, avoiding misoperation caused by missing information and ensuring the continuity and accuracy of the drug administration process.

[0019] Preferably, the push-button injection switch valve is provided with a knob-type flow regulator with at least two positions, and the adjustment end of the knob-type flow regulator is exposed outside the push-button injection switch valve; The electronic timer has at least two drug delivery modes corresponding to at least two gear positions. Each drug delivery mode corresponds to a set of preset injection parameters. The injection parameters include a preset threshold for the total effective injection duration matched with the gear position and the pulse activation duration and interval of the pressure monitoring module in the pressure-limited pulse injection state. When the operator manually rotates the rotary flow regulator to a certain position, the push-button injection switch valve sends a mode switching signal to the electronic timer. In response to the mode switching signal, the electronic timer automatically calls the drug administration mode corresponding to that position and controls the opening and closing of the push-button injection switch valve and the pulse injection logic of the pressure monitoring module according to the preset injection parameters in the drug administration mode. The at least two gear positions include: The first setting corresponds to the low-flow dosing mode, which is suitable for chicks aged 1-20 days. In the low-flow dosing mode, the electronic timer is preset to a single spray duration of 0.3-0.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.08-0.1 seconds, and the interval between two adjacent activations is 0.4-0.6 seconds. The second setting corresponds to the medium flow dosing mode, which is suitable for chickens aged 21-70 days. In the medium flow dosing mode, the electronic timer is preset to a single spray duration of 0.8-1.2 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.15-0.25 seconds, and the interval between two adjacent activations is 0.3-0.5 seconds. The third setting corresponds to the high-flow dosing mode, which is suitable for chickens over 71 days old. In the high-flow dosing mode, the electronic timer is preset to a single spray duration of 1.5-2.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.25-0.35 seconds, and the interval between two adjacent activations is 0.2-0.4 seconds.

[0020] In actual poultry farming, chickens range in age from newly hatched chicks to adults several hundred days old, with significant differences in cloacal volume, mucosal sensitivity, and the amount of medication required per dose. Although pulse spraying has been implemented through pressure monitoring to reduce the impact of excessively high pressure, a fixed pulse parameter makes it difficult to simultaneously meet the physiological needs of chickens of different ages. For chicks aged 1 to 20 days, the cloaca is extremely small and fragile, requiring very small, low-impact medication delivery; excessively strong pulses or slightly larger single-dose sprays can cause mucosal damage. For adult chickens over 71 days old, the cloaca is larger and the mucosa is more tolerant; if the pulse is too weak or the spray time is too short, the medication cannot reach the deep intestines, resulting in low administration efficiency and poor treatment effects. To address this contradiction, the device incorporates a rotary flow regulator with at least two settings within the push-button spray valve, with the adjustment end exposed for easy operation by the operator. The electronic timer has preset dosing modes corresponding to these settings. Each mode includes a complete set of spray parameters: a preset threshold for the total duration of a single spray matching the setting, and the pulse duration and interval when the pressure is too high and the pressure-limiting pulse spray mode is activated. When the operator rotates the knob to the first setting according to the age of the chicks, the switching valve sends a mode switching signal to the electronic timer, and the timer automatically activates the low-flow dosing mode. In this mode, the duration of a single spray is set to 0.3-0.5 seconds. If the pulse mode is activated, each spray lasts for 0.08-0.1 seconds with an interval of 0.4-0.6 seconds. This precise parameter combination perfectly meets the needs of chicks aged 1 to 20 days for micro-volume, low-impact dosing. When the knob is turned to the second setting, the device switches to the medium-flow dosing mode, with the duration of a single spray extended to 0.8 to 1.2 seconds, and the pulse parameters adjusted to 0.15-0.25 seconds with an interval of 0.3-0.5 seconds, suitable for chicks aged 21 to 70 days. When the knob is turned to the third position, the high-flow dosing mode is activated, with a single spray lasting 1.5-2.5 seconds. The pulse parameters are adjusted accordingly to an onset time of 0.25-0.35 seconds and an interval of 0.2-0.4 seconds, ensuring that adult chickens over 71 days old receive sufficient medication while maintaining high dosing efficiency. Through the linkage between this mechanical multi-position knob and the multi-mode dosing logic within the electronic timer, the operator only needs to rotate one knob according to the chicken's age to simultaneously adjust two key parameters: the total spray duration and the pulse spray duty cycle. No professional knowledge or complex settings are required. This design allows the same dosing device to consistently match the physiological characteristics of the chicken's current age with the most suitable parameters throughout its entire growth cycle, ensuring both safety in chicks and efficacy in adult chickens, achieving precise and phased cloacal dosing.

[0021] Preferably, the electronic timer includes an accumulation timing module, which is electrically connected to the electromagnetic drive mechanism of the push-type injection switch valve. The accumulation timing module is used to monitor and accumulate the actual time that the push-type injection switch valve is in the open state in real time, and the total effective injection time is the actual valve opening accumulation time recorded by the accumulation timing module. When the push-button injection switch valve is triggered, the electronic timer starts the cumulative timing module, which begins to record the actual opening time of the push-button injection switch valve and compares the cumulative opening time with the preset threshold. If the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold during the drug administration process, the electronic timer responds to the pressure limiting signal and controls the press-type injection switch valve to open intermittently in a pulse manner. During this period, the cumulative timing module only counts during the actual opening time of the switch valve, and pauses the timing during the interval when the switch valve is closed. When the cumulative opening time recorded by the cumulative timing module reaches the preset threshold, regardless of the pressure state at this time, the electronic timer sends a power-off signal to the electromagnetic drive mechanism to close the press-type injection switch valve, thereby ending the current drug administration. If the pressure value drops below the second pressure threshold in pulse mode, the electronic timer resumes continuous injection, and the cumulative timing module continues to accumulate the actual on-time until the preset threshold is reached.

[0022] When using pressure monitoring to implement pulse injection to cope with excessively high pressure, a critical problem arises if the electronic timer still operates on an absolute time basis: when the device switches to intermittent pulse mode due to excessive pressure, the actual time the valve is open per unit time is much shorter than in continuous injection mode, yet the timer continues to run. This means that although the operator perceives the injection action as lasting the set duration (e.g., 1 second), the actual cumulative time the valve is open may only be 0.3-0.5 seconds, resulting in a significant reduction in the amount of medication dispensed, leading to a severely insufficient dosage and directly impacting treatment efficacy. To address this discrepancy between timing logic and actual conditions, the electronic timer incorporates a cumulative timing module. This module is electrically connected to the electromagnetic drive mechanism of the push-button injection valve and is specifically designed to monitor and accumulate the actual duration the valve is open in real time. When the operator triggers the valve to begin medication administration, the cumulative timing module activates, but only times the period during which the valve is actually open and medication is dispensed, automatically pausing during the valve closure intervals. Regardless of pressure fluctuations during administration, or whether the device operates in continuous or pulsed spray mode, the cumulative timing module only records the cumulative time the valve is actually open. When this cumulative opening time reaches a preset threshold (e.g., 0.5 or 1 second), the electronic timer sends a power-off signal to the electromagnetic drive mechanism, closing the valve and ending the administration. Even if the pressure drops to a safe range in pulsed mode and the device resumes continuous spray mode, the cumulative timing module continues to accumulate the actual opening time until the preset threshold is reached. Through this design, the total effective spray time is no longer equivalent to the absolute time the operator triggers the valve, but strictly corresponds to the cumulative time of valve opening and actual drug dispensing. Regardless of pressure fluctuations causing spray mode switching, the total amount of drug actually dispensed during a single administration session always remains consistent with the dose represented by the preset threshold, fundamentally avoiding dose wastage caused by pulsed spraying and ensuring the accuracy of administration and the reliability of therapeutic efficacy.

[0023] The present invention has at least the following beneficial effects: First, the chicken cloacal drug delivery device of the present invention integrates the handle and cover into one piece, and incorporates a manual air pump-type pressurization structure on the cover, allowing the operator to complete the entire process of holding, pressurizing, and spraying with one hand. This completely changes the traditional drug delivery method that requires two people to operate, significantly improving the work efficiency on the farm. Simultaneously, the device is equipped with various sizes of conical tubular spray nozzles, whose length and diameter are gradient-designed according to the physiological characteristics of the cloaca of chickens of different ages. The front end is hemispherical with multiple evenly distributed micropores, allowing the drug solution to cover the mucosal surface in a multi-angle, diffuse manner. This achieves precise matching of the spray depth to the chicken's growth stage, effectively avoiding mucosal damage caused by improper nozzle specifications and significantly improving drug absorption and utilization.

[0024] Secondly, the built-in electronic timer and pressure monitoring module of this invention form a coordinated control system. By collecting the internal pressure of the container in real time and comparing it with a preset safety threshold, the device can automatically pause drug administration and prompt the operator to replenish the pressure when the pressure is insufficient. When the pressure is too high, it automatically switches to pulsed intermittent spraying to reduce the impact force of each spray. At the same time, the cumulative timing module only accumulates the actual opening time of the valve, ensuring that no matter how the spraying mode changes, the actual amount of drug sprayed in a single administration is always strictly consistent with the preset threshold. This dynamic adjustment mechanism not only makes up for the inherent defect of unstable pressure in manual pressurization, but also fundamentally solves the problem of dosage deviation caused by pressure fluctuations, ensuring the safety and accuracy of each administration.

[0025] Third, the device of this invention incorporates a miniature vibration motor inside the handle, linked to an electronic timer. This motor transforms the internal states—normal operation, pulse spraying, and low-voltage pause—into distinct vibration modes clearly perceptible to the operator's hand. This allows farmers to monitor the device's operation in real-time and take timely action even in noisy environments without needing to be distracted by observation or listening. The push-button spray valve also features a multi-position rotary flow regulator, linked to the multi-mode drug delivery logic within the electronic timer. The operator only needs to rotate the knob according to the chicken's age to simultaneously adjust both the total duration of a single spray and the pulse spray duty cycle, achieving precise, safe, and efficient drug delivery throughout the entire growth cycle from chicks to adults.

[0026] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of one technical solution of the present invention.

[0028] 1. Container; 2. Lid; 3. Handle; 4. Liquid delivery pipe; 5. Press-type spray valve; 6. Connecting pipe; 7. Spray nozzle; 8. Guide sleeve; 9. Pressure booster rod. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0030] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0031] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials mentioned are commercially available. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0032] like Figure 1 As shown, the present invention provides a cloacal drug delivery device for chickens, including a container 1 for containing a drug solution and a lid 2 that covers the container 1, and further comprising: The handle 3 is set on the cover 2, and the handle 3 and the cover 2 are a single molded plastic component; A pressurization structure, which is connected to the interior of container 1, is used to increase the pressure inside container 1; The spraying structure includes a liquid delivery pipe 4, a press-type spray switch valve 5, a liquid conduit, and a spray nozzle 7 assembly. The central area of ​​the cover 2 is provided with a vertically penetrating mounting hole. The liquid delivery pipe 4 is a rigid pipe that passes through the mounting hole and extends to the bottom of the container 1. The upper end of the liquid delivery pipe 4 protrudes from the cover 2 and is connected to the press-type spray switch valve 5. The outlet of the press-type spray switch valve 5 is connected to a flexible liquid conduit. The end of the liquid conduit is fixedly connected to a rigid insertion pipe 6. The outer wall of the insertion pipe 6 is provided with an annular groove. The spray gun head 7 is a conical tube with a small front end and a large rear end. The inner wall of the rear opening of the spray gun head 7 is provided with an annular protrusion that matches the annular groove so that the spray gun head 7 and the insertion tube 6 can be detachably fixed. An electronic timer is fixedly installed on the top of the cover 2. The control terminal of the electronic timer is connected to the electromagnetic drive mechanism inside the press-type injection switch valve 5 via a signal line. The electronic timer is used to start timing when the press-type injection switch valve 5 is triggered, and to send a power-off signal to the electromagnetic drive mechanism when the total effective injection time reaches a preset threshold, so that the press-type injection switch valve 5 is closed. The electronic timer can provide auxiliary control over the opening and closing state of the press-type injection switch valve 5 according to preset logic.

[0033] Container 1 can be blow-molded from transparent polyethylene or polyethylene terephthalate. Container 1 can be available in capacities of 250 ml, 500 ml, or 1000 ml. The opening at the top of container 1 has external threads for a sealed connection with lid 2. Lid 2 can be injection-molded from polypropylene. The inner side of lid 2 has internal threads that match the external threads of container 1. After lid 2 and container 1 are tightened, a sealing gasket ensures a liquid and airtight seal. Handle 3 is a single, integrally molded plastic component with lid 2. Handle 3 can be designed as a semi-circular or arc-shaped component, located on one side of lid 2. Reinforcing ribs can be added at the connection between handle 3 and lid 2 to improve structural strength. The surface of handle 3 can have anti-slip textures for easy gripping.

[0034] The pressurization structure can be in the form of a manual air pump, which includes a cylindrical guide sleeve 8 that can be mounted on the cover 2. The guide sleeve 8 can be integrally formed with the cover 2 or fixed by a threaded connection. The pressurization rod 9 can be made of stainless steel or high-strength plastic and can slide back and forth inside the guide sleeve 8. A press handle can be provided at the outer end of the pressurization rod 9. The liquid delivery pipe 4 is a rigid pipe and can be made of stainless steel or rigid PVC. The liquid delivery pipe 4 passes through the mounting hole in the central area of ​​the cover 2 and extends to the bottom of the container 1. The lower end of the liquid delivery pipe 4 can be provided with an inclined cut to prevent it from sticking to the bottom of the container 1. The upper end of the liquid delivery pipe 4 protrudes from the cover 2 and is connected to the press-type injection switch valve 5. The press-type injection switch valve 5 can be a commercially available normally closed solenoid valve, which has an inlet, an outlet and a manual press handle on its body. The valve opens when the operator presses the press handle and closes when the operator releases it. The outlet of the press-type injection switch valve 5 is connected to a flexible liquid conduit. The liquid conduit can be made of silicone or polyurethane. The end of the liquid conduit is fixedly connected to a rigid insertion tube 6. The insertion tube 6 can be made of stainless steel or brass. An annular groove is provided on the outer wall of the insertion tube 6.

[0035] The spray nozzle 7 can be integrally injection molded from medical-grade polypropylene material. The spray nozzle 7 is a conical tube with a smaller front end and a larger rear end. An annular protrusion on the inner wall of the rear opening of the spray nozzle 7 matches the annular groove on the insertion tube 6. The spray nozzle 7 and the insertion tube 6 are detachably fixed by the annular protrusion engaging with the annular groove. An electronic timer is fixedly installed on the top of the cover 2. The electronic timer can be a digital time relay or a microcontroller control module. The control terminal of the electronic timer is connected to the electromagnetic drive mechanism inside the push-button spray valve 5 via a signal line. During use, the operator selects the appropriate size spray nozzle 7 according to the age of the chicken and installs it on the insertion tube 6. The prepared medicine solution is poured into the container 1 and the cover 2 is tightened. Then, the operator holds the handle 3 and pulls the pressure boosting rod 9 to pressurize the container 1. When the pushing and pulling resistance increases, it indicates that there is sufficient pressure inside the container 1. Gently insert the spray nozzle 7 into the chicken's cloaca, and press the handle of the push-button spray switch valve 5. The medication, under the action of compressed air, is sprayed into the cloaca through the medication delivery pipe 4, the switch valve, the medication conduit, and the spray nozzle 7. Simultaneously with pressing the handle, the electronic timer is triggered and begins timing. When the total effective spraying time reaches a preset threshold, the electronic timer sends a power-off signal to the electromagnetic drive mechanism, causing the push-button spray switch valve 5 to automatically close, thus ending the medication administration.

[0036] The preset threshold in the electronic timer can be set according to the age of the chickens. For example, it can be set to 0.5 seconds for chickens under 42 days old and 1 second for chickens 42 days old and older. The operator can select this setting using a DIP switch or button on the timer. The electronic timer works as follows: when the push-button spray valve 5 is manually triggered, its internal microswitch or Hall sensor sends a trigger signal to the electronic timer, which starts timing. Simultaneously, it maintains power supply to the electromagnetic drive mechanism to keep the valve open. When the preset threshold is reached, the electronic timer cuts off the power supply to the electromagnetic drive mechanism, the valve closes, and the electronic timer resets to await the next trigger. This design allows the operator to complete all operations—holding, pressurizing, inserting, and spraying—with just one hand, without the need for assistance from others, effectively improving drug administration efficiency. By replacing the spray nozzles with different specifications, the system can adapt to the differences in cloacal depth and diameter of chickens of different ages. The hemispherical closed design at the front end of the nozzle and the micropores on the side wall allow the liquid to be sprayed evenly from multiple angles, avoiding local irritation caused by the liquid being concentrated in one place. At the same time, the electronic timer strictly controls the single spray time, preventing excessive liquid or excessive spraying due to insufficient operator experience. This ensures the drug administration effect while reducing the risk of damage to the cloacal mucosa.

[0037] In another technical solution, the pressurization structure includes a cylindrical guide sleeve 8 disposed on the cover 2, a pressurization rod 9 that can reciprocate and slide through the guide sleeve 8, and a rubber piston fixedly connected to one end of the pressurization rod 9 located inside the guide sleeve 8. The outer edge of the rubber piston is tightly fitted with the inner wall of the guide sleeve 8. An air inlet is provided on the side wall of the guide sleeve 8 near the cover 2. A one-way valve is provided at the bottom of the guide sleeve 8 to allow gas to enter the container 1 from the guide sleeve 8 but to prevent gas or liquid in the container 1 from flowing back into the guide sleeve 8. The pressurization rod 9, the guide sleeve 8, the rubber piston, and the one-way valve together constitute a manual air pump structure.

[0038] The pressurization structure can be implemented using a manual air pump. It includes a cylindrical guide sleeve 8 that can be mounted on the cover 2. The guide sleeve 8 can be integrally injection molded with the cover 2, or it can be fixed to the cover 2 via threaded connection or ultrasonic welding. The inner diameter of the guide sleeve 8 can be selected from different specifications such as 15mm, 20mm, or 25mm, and the height of the guide sleeve 8 can be selected from 50mm, 80mm, or 100mm. The inner wall of the guide sleeve 8 needs to be polished to reduce frictional resistance. The pressure boosting rod 9 can be made of stainless steel or high-strength engineering plastic. The diameter of the pressure boosting rod 9 matches the inner diameter of the guide sleeve 8. For example, when the inner diameter of the guide sleeve 8 is 20mm, the diameter of the pressure boosting rod 9 can be selected from 8mm or 10mm. One end of the pressure boosting rod 9 inserts into the guide sleeve 8, and the other end protrudes from the guide sleeve 8 and can be equipped with a pressing handle. The surface of the handle can be added with anti-slip texture or covered with a rubber sleeve for easy operation.

[0039] A rubber piston is fixedly connected to one end of the booster rod 9, which is located inside the guide sleeve 8. The rubber piston can be made of natural rubber or nitrile rubber and molded. The outer diameter of the rubber piston is slightly larger than the inner diameter of the guide sleeve 8 to ensure a tight fit. For example, when the inner diameter of the guide sleeve 8 is 20mm, the outer diameter of the piston can be 21mm. One or two annular sealing lips can be provided on the rubber piston to enhance the sealing effect. An internally threaded metal insert can be provided at the center of the piston. The end of the booster rod 9 has an external thread, and the piston is fixed to the booster rod 9 through a threaded connection. An air inlet is provided on the side wall of the guide sleeve 8 near the cover 2. The diameter of the air inlet can be 2mm, 3mm, or 4mm. A dust filter can be installed at the air inlet to prevent impurities from entering. A one-way valve is provided at the bottom of the guide sleeve 8. The one-way valve can be a spring-loaded one-way valve or an umbrella-shaped one-way valve. The opening pressure of the one-way valve can be set to 0.05 MPa. The installation direction of the one-way valve ensures that gas can only enter the container 1 from the guide sleeve 8, while preventing gas or liquid in the container 1 from flowing back into the guide sleeve 8.

[0040] During assembly, first install the rubber piston at the end of the pressure boosting rod 9, then insert the pressure boosting rod 9 into the upper port of the guide sleeve 8, making the piston fit against the inner wall of the guide sleeve 8. The lower end of the guide sleeve 8 is sealed to the cover 2, and an O-ring can be added at the connection to ensure airtightness. A one-way valve is installed at the bottom center of the guide sleeve 8, with its air inlet connected to the inside of the guide sleeve 8 and its air outlet connected to the inside of the container 1. When the operator pulls the pressure boosting rod 9 upward, the piston moves upward, the volume of the space below the piston increases, creating a negative pressure, and external air is drawn into the area below the piston inside the guide sleeve 8 through the air inlet. When the operator pushes the pressure boosting rod 9 downward, the piston moves downward, the air below the piston is compressed, and the pressure increases. When the pressure exceeds the opening pressure of the one-way valve, the one-way valve opens, and compressed air enters the container 1. By repeatedly pushing and pulling the pressure boosting rod 9, a certain volume of air can be forced into the container 1 each time. As the number of pushes and pulls increases, the pressure inside the container 1 gradually increases. The one-way valve automatically closes when the pressure boosting rod 9 is pulled up, preventing compressed air in container 1 from flowing back into guide sleeve 8. This manual air pump structure allows the operator to replenish pressure in container 1 as needed, without requiring an external power or air source. It is simple, reliable, and easy to maintain. The operator can roughly judge the pressure state inside container 1 by feeling the change in pushing and pulling resistance. When the pushing and pulling resistance increases significantly, it indicates that the pressure is sufficient and drug administration can begin.

[0041] In another technical solution, the spray gun head 7 is integrally injection molded from medical-grade polypropylene material. The spray gun head 7 has the following 5 specifications: the spray gun head 7 with a length of 3mm has a bottom diameter of 1mm; the spray gun head 7 with a length of 5mm has a bottom diameter of 1.5mm; the spray gun head 7 with a length of 7mm has a bottom diameter of 2mm; the spray gun head 7 with a length of 10mm has a bottom diameter of 2mm; and the spray gun head 7 with a length of 15mm has a bottom diameter of 2.5mm.

[0042] In actual breeding, the cloacal depth and diameter of chicks and adult chickens differ significantly, and it is often difficult to meet the needs of different growth stages by using the same size spray pipe.

[0043] When using long dispensing tubes for younger chicks, the tube tip can easily reach deep into the cloaca or even penetrate the intestinal wall, causing mucosal damage or perforation, leading to local bleeding and inflammation, and in severe cases, secondary infection. Conversely, when using shorter dispensing tubes for older adult chickens, the medication cannot reach the large intestine region deep within the cloaca, often remaining near the end. This not only causes medication spillage and waste but, more importantly, prevents sufficient absorption by the mucosa, directly impacting treatment effectiveness. Farm operations typically require multiple dispensing devices of different sizes to accommodate flocks of varying ages, increasing equipment costs and management complexity.

[0044] To address this issue, this embodiment provides a standardized design for the injection nozzle 7. The injection nozzle 7 can be integrally injection molded from medical-grade polypropylene material. This material has good biocompatibility and suitable rigidity, meeting the requirements of insertion operations. Simultaneously, the injection molding process ensures the accuracy of the nozzle's dimensions and the smoothness of its inner wall. The injection nozzle 7 is generally shaped like a conical tube, smaller at the front end and larger at the rear end. An annular protrusion is provided on the inner wall of its rear opening. This annular protrusion matches an annular groove on the outer wall of the insertion tube 6, achieving detachable fixation by the annular protrusion engaging with the annular groove. To facilitate selection by farmers based on the age of the chickens, the injection nozzle 7 can be configured in five different sizes.

[0045] The first type of spray nozzle 7 has a length of 3mm and a bottom diameter of 1mm. This small nozzle is suitable for chicks aged 1-20 days, whose cloaca is shallow and has a small diameter. Using this nozzle ensures that it is placed precisely into the shallow part of the cloaca, without puncturing the mucous membrane, and that the medication covers the target area. The second type of spray nozzle 7 has a length of 5mm and a bottom diameter of 1.5mm, suitable for chickens aged 21-42 days. As chickens grow, the depth and diameter of the cloaca increase, and this size better matches the physiological structure at this stage. The third type of spray nozzle 7 has a length of 7mm and a bottom diameter of 2mm, suitable for chickens aged 43-70 days. At this stage, chickens grow rapidly, and the size of the cloaca increases further, requiring a longer nozzle to deliver the medication to deeper areas. The fourth type of spray nozzle 7 has a length of 10mm and a bottom diameter of 2mm, suitable for chickens aged 71-120 days. This specification increases the length while maintaining the same diameter to accommodate the further deepening of the cloaca. The fifth type of spray nozzle 7 has a length of 15mm and a bottom diameter of 2.5mm, suitable for adult chickens over 121 days old. At this stage, the cloaca is fully developed, with both depth and diameter reaching their maximum, requiring the longest nozzle and a larger diameter to ensure that the medication can pass smoothly and reach the deep intestines.

[0046] In use, the operator selects the appropriate spray nozzle 7 from the five specifications mentioned above according to the chicken's age, aligns the annular protrusion at the rear end with the insertion tube 6, and pushes it in firmly until the annular protrusion is fully engaged in the annular groove. A slight click indicates proper installation. After completing the pressurization operation as described above, the selected spray nozzle 7 is inserted into the chicken's cloaca for drug administration. This standardized nozzle configuration allows the same drug delivery device to be used throughout the chicken's entire growth cycle, achieving precise matching of nozzle length and diameter with the physiological structure of the cloaca at different age stages. This effectively avoids mucosal damage caused by excessively long nozzles and prevents the drug from reaching deeper tissues due to excessively short nozzles. The use of medical-grade polypropylene material ensures safety when the nozzle contacts the mucosa, while the one-piece injection molding process makes the inner wall of the nozzle smooth and burr-free, further reducing friction and irritation to the mucosa. This design allows farmers to quickly select the appropriate nozzle without professional knowledge, simplifying operation and reducing chicken injury and drug waste caused by equipment mismatch.

[0047] In another technical solution, the front end of the spray gun head 7 is closed and hemispherical. Multiple microholes with a diameter of 0.3-0.5mm are opened on the hemispherical area at the front end of the spray gun head 7 and on the side wall near the front end. The multiple microholes are evenly distributed.

[0048] The spray nozzle 7 of this invention is a further optimization based on the aforementioned five standardized nozzles. Its front end adopts a closed structure and is processed into a hemispherical profile. The hemispherical front end surface is smooth and rounded, which can slide smoothly along the mucosal surface during insertion into the cloaca, effectively reducing the scratching and irritation that may be caused by the sharp or straight tip of the nozzle, and reducing the stress response of chickens during the administration process.

[0049] Multiple tiny liquid outlet holes are evenly distributed on the front end region of the hemispherical shape and on the circumference of the side wall near the front end. The diameter of these microholes can be controlled within the range of 0.3-0.5 mm, for example, 0.3 mm, 0.4 mm, or 0.5 mm. The specific value can be adjusted according to the viscosity of the liquid and the desired atomization effect. The microholes can be distributed in an evenly spaced manner to ensure that multiple spray points are formed on the hemispherical surface and the circumference of the side wall. During injection molding, these microholes can be directly formed using a fine core on the mold, or they can be processed by subsequent mechanical drilling.

[0050] Once compressed air is established within container 1 via the pressurization structure, the liquid medicine, driven by pressure, enters the push-button spray valve 5 from the medicine delivery pipe 4, and then reaches the insertion pipe 6 and spray nozzle 7 via the medicine conduit. Because the nozzle tip is closed, the liquid medicine cannot be sprayed out in a straight line from the end; instead, it is evenly distributed to various micro-holes. When the liquid medicine is sprayed simultaneously from multiple micro-holes, it no longer forms a single straight jet, but rather a multi-angled, multi-layered diffused spray within the cloaca. The liquid medicine sprayed from the hemispherical front micro-holes diffuses forward and obliquely forward, while the liquid medicine sprayed from the side wall micro-holes diffuses radially in all directions. The combined effect of these two processes allows the liquid medicine to cover the front and surrounding mucous membranes of the cloaca, achieving a comprehensive and uniform distribution.

[0051] This multi-hole dispersion spray design significantly increases the contact area between the medication and the mucous membrane, allowing for more complete drug absorption. Simultaneously, because the total flow rate is dispersed across multiple micropores, the amount of medication sprayed from each micropore is relatively small, reducing the single-point impact force on the mucous membrane and avoiding mechanical damage that might occur with a straight jet. The micropore diameter is controlled within the range of 0.3 to 0.5 mm, ensuring good atomization of the medication under normal pressure while avoiding clogging by tiny particles in the medication due to excessively small pore size. In practical operation, after selecting a suitable nozzle according to the aforementioned implementation method, the multi-hole nozzle ensures smooth insertion while achieving uniform distribution and gentle spraying of the medication within the cloaca, further improving the safety of drug administration and drug absorption efficiency.

[0052] In another technical solution, the preset threshold under the basic state is set to 0.5 seconds or 1 second according to the age of the chicken, with chickens under 42 days old preset to 0.5 seconds and chickens 42 days old and above preset to 1 second.

[0053] Chicks have small cloacal volumes and delicate mucous membranes, requiring less medication. If the operator presses the cloaca for too long when administering medication to chicks, excess medication will overflow and be wasted. More importantly, prolonged impact of a large amount of medication on the delicate mucous membranes can easily cause local irritation and damage, potentially leading to mucosal edema or rupture. Adult chickens, on the other hand, have larger cloacal volumes and require relatively more medication to cover the entire mucous membrane surface and achieve effective absorption. If the operator presses the cloaca for too short a time, insufficient medication will be sprayed, failing to achieve the desired therapeutic effect and potentially leading to prolonged illness or treatment failure. This manual control method makes it difficult to standardize dosages, resulting in varying treatment outcomes.

[0054] To address this issue, this implementation introduces segmented preset thresholds based on the age of the chickens into the electronic timer. The electronic timer can be a microcontroller control module, internally storing two sets of basic preset time parameters. The first set of parameters is set to 0.5 seconds, suitable for chickens under 42 days old; the second set is set to 1 second, suitable for chickens 42 days old and older. An age selection switch can be installed on the electronic timer's panel. This switch can be a two-position DIP switch or a button; turning it to one side corresponds to the mode for chickens under 42 days old, and turning it to the other side corresponds to the mode for chickens 42 days old and older. Before administering medication, the operator first switches the selection switch to the appropriate position according to the age of the flock to be treated. Upon receiving the selection signal, the electronic timer automatically retrieves the corresponding preset threshold.

[0055] In practice, after the operator completes the preparation of the medicine solution, selection of the nozzle, and pressurization of container 1 according to the aforementioned implementation method, the operator inserts the spray nozzle 7 into the cloaca of the chicken using the handheld device. When the press handle of the push-button spray switch valve 5 is pressed, the microswitch inside the switch valve is triggered, sending a start signal to the electronic timer. The electronic timer starts timing and simultaneously maintains power supply to the electromagnetic drive mechanism to keep the valve open. If the mode for chickens under 42 days old is selected, the electronic timer immediately cuts off the power supply to the electromagnetic drive mechanism when the timing reaches 0.5 seconds, the valve automatically closes, and spraying stops. If the mode for chickens 42 days old and above is selected, the electronic timer cuts off the power supply when the timing reaches 1 second, and the valve closes. No matter how long the operator presses the switch valve, as long as the preset threshold is exceeded, the timer will forcibly close the valve, ensuring that the actual duration of a single spray is strictly limited within the preset value.

[0056] This age-based preset threshold design allows operators to differentiate medication administration between chicks and adult chickens without requiring specialized veterinary pharmacology knowledge, relying solely on simple age determination. The 0.5-second setting fully considers the small cloaca and sensitive mucous membranes of chicks, ensuring the medication volume remains within a safe range and avoiding irritation and damage caused by over-spraying. The 1-second setting meets the basic medication volume requirements of adult chickens, ensuring sufficient dosage enters the cloaca and covers the mucous membrane surface, guaranteeing subsequent absorption. This design strikes a balance between ease of operation and precise dosage control, allowing the same device to adapt to the basic medication needs of chickens at different growth stages.

[0057] In another technical solution, the electronic timer is also connected to a pressure monitoring module, which includes a pressure sensor disposed on the inner wall of the container 1 and a comparator electrically connected to the pressure sensor. The comparator is preset with a first pressure threshold and a second pressure threshold. The first pressure threshold corresponds to the minimum pressure required to start the jet, and the second pressure threshold corresponds to the maximum pressure to prevent damage to the cloaca. The pressure sensor is used to collect the current pressure value inside the container 1 in real time and send the current pressure value to the comparator; The comparator is used to compare the current pressure value with a first pressure threshold and a second pressure threshold. When the push-button injection switch valve 5 is triggered, the electronic timer starts counting, and the pressure monitoring module starts monitoring the pressure. If the comparator determines that the current pressure value is lower than the first pressure threshold during the timing process, the comparator sends an interrupt signal to the electronic timer. The electronic timer responds to the interrupt signal by pausing the timing and simultaneously sends a power-off signal to the electromagnetic drive mechanism in the push-button injection switch valve 5, causing the push-button injection switch valve 5 to close. The electronic timer automatically resumes timing and restores the push-button injection switch valve 5 to the open state when the operator pressurizes the pressure again through the pressurization structure to raise the current pressure value back above the first pressure threshold and the push-button injection switch valve 5 remains in the triggered state. If the comparator determines that the current pressure value is higher than the second pressure threshold during the timing process, the comparator sends a pressure limiting signal to the electronic timer. In response to the pressure limiting signal, the electronic timer controls the push-button injection switch valve 5 to open intermittently in a pulse manner. The duration of each opening is 0.1 to 0.2 seconds, and the interval between two adjacent openings is 0.3 to 0.5 seconds. The continuous injection state is restored when the current pressure value falls below the second pressure threshold and the total effective injection time has not reached the preset threshold.

[0058] In existing cloacal drug delivery techniques, the injection pressure relies entirely on the operator's manual pressing force and speed. This manual pressurization method lacks a pressure stabilization mechanism, making it difficult for the operator to maintain consistent pressure each time, resulting in continuous pressure fluctuations during injection. In actual use, when the operator slows down or weakens the pressing speed, the pressure inside container 1 becomes insufficient, causing the sprayed liquid to change from a fine mist to coarse droplets, or even resulting in interruption of the spray flow, preventing the liquid from evenly adhering to the cloacal mucosa. Conversely, when the operator applies excessive force, the strong jet can impact the cloacal mucosa, causing the chicken to struggle violently or even suffer mucosal damage. This problem of pressure instability is particularly pronounced when operating alone, as the operator needs to simultaneously manage multiple actions such as holding the chicken, turning the vent, aiming, and pressing, making it difficult to precisely control the pressing force.

[0059] To address the inherent pressure instability issue of manual pressurization, this embodiment adds a pressure monitoring module to the electronic timer. This module includes a pressure sensor that can be installed on the inner wall of container 1 and a comparator electrically connected to the pressure sensor. The pressure sensor can be a diffused silicon pressure sensor or a ceramic capacitive pressure sensor, with a range set to 0-0.5 MPa. It can acquire the current pressure value inside container 1 in real time and convert this pressure value into an electrical signal, which is then sent to the comparator. The comparator can be a dedicated voltage comparator integrated circuit or integrated into the microcontroller control module. The comparator has a first pressure threshold and a second pressure threshold preset. The first pressure threshold corresponds to the minimum pressure required to maintain normal atomization spray and can be set to 0.05 MPa; the second pressure threshold corresponds to the maximum pressure that may cause damage to the cloaca and can be set to 0.15 MPa. These two thresholds can be adjusted appropriately according to the viscosity of the drug solution and the tolerance of chickens of different ages.

[0060] When the operator completes the pressurization operation according to the aforementioned implementation method and presses the handle of the push-button injection switch valve 5, the electronic timer starts timing, and the pressure monitoring module starts real-time monitoring. The pressure sensor collects the pressure value inside container 1 at a frequency of tens or even hundreds of times per second and sends it to the comparator. The comparator continuously compares the current pressure value with the first pressure threshold and the second pressure threshold. If the pressure value is found to drop below the first pressure threshold during monitoring, for example, below 0.05 MPa, the comparator immediately sends an interrupt signal to the electronic timer. The electronic timer responds to the interrupt signal by pausing timing and simultaneously sends a power-off signal to the electromagnetic drive mechanism inside the push-button injection switch valve 5, causing the valve to close and the injection to stop. At this time, the operator will notice the interruption of injection and realize that pressure needs to be replenished. So, the operator pulls the pressure boosting rod 9 to refill the container 1. When the pressure rises back above the first pressure threshold, the comparator detects that the pressure has returned to normal, the electronic timer automatically resumes timing and reopens the valve, and the injection continues. Throughout the process, the timer only counts during the actual time period when the valve is open; it does not count during the pause period.

[0061] If the pressure value rises above the second pressure threshold during monitoring, for example, exceeding 0.15 MPa, the comparator sends a pressure limiting signal to the electronic timer. Responding to this signal, the electronic timer stops controlling the valve in a continuously open manner and switches to a pulsed intermittent opening mode. In this mode, the duration of each valve opening can be set to 0.1-0.2 seconds, and the interval between two consecutive openings can be set to 0.3-0.5 seconds. For example, setting the opening time to 0.15 seconds and the interval to 0.4 seconds. This pulsed spray disperses the amount of medication sprayed each time, significantly reducing the impact force of a single spray, while the interval allows the sprayed medication to diffuse and be initially absorbed within the cloaca. When the pressure sensor detects that the pressure inside container 1 gradually drops below the second pressure threshold due to continuous spraying, the comparator sends a release pressure signal to the electronic timer, and the electronic timer resumes continuous spraying until the total effective spraying time reaches the preset threshold, at which point the valve closes.

[0062] This pressure monitoring and dynamic adjustment mechanism effectively compensates for the instability inherent in manual pressurization. When the pressure is insufficient, administration is automatically paused, and the operator is prompted to replenish the pressure, preventing insufficient dosage due to poor atomization or interrupted spraying caused by low pressure. When the pressure is too high, it automatically switches to pulse spray mode, dispersing the concentrated impact force and avoiding mechanical damage to the cloacal mucosa. Simultaneously, the pulse intervals promote drug diffusion and absorption on the mucosal surface. Regardless of pressure fluctuations, the entire administration process remains within the preset safe pressure range, ensuring both continuity and accuracy of administration while enhancing the protective effect on the chickens.

[0063] In another technical solution, a haptic feedback module electrically connected to the electronic timer is also included; The tactile feedback module includes a miniature vibration motor disposed inside or on the surface of the handle 3; The electronic timer has at least two different vibration modes preset within it, each vibration mode corresponding to a specific operating state of the drug delivery device, the specific operating state including: The first working state is the normal working state in which the press-type injection switch valve 5 is normally open and the pressure monitoring module determines that the current pressure value is between the first pressure threshold and the second pressure threshold. The second working state is a pressure-limiting pulse injection state in which the electronic timer controls the push-type injection switch valve 5 to open intermittently in a pulse manner when the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold. And the third working state, which is the underpressure pause state in which the press-type injection switch valve 5 is closed when the pressure monitoring module determines that the current pressure value is lower than the first pressure threshold; When the drug delivery device enters the first working state, the electronic timer controls the micro vibration motor to vibrate continuously at a first preset frequency and amplitude; When the drug delivery device enters the second working state, the electronic timer controls the micro vibration motor to perform intermittent pulse vibration at a second preset frequency and amplitude, and the pulse frequency is related to the intermittent opening frequency of the press-type injection switch valve 5. When the drug delivery device enters the third working state, the electronic timer controls the micro vibration motor to emit intermittent, suggestive vibration alarms at a third preset frequency and amplitude.

[0064] As described in the preceding embodiments, the drug delivery device with a pressure monitoring module can automatically switch between continuous spraying, pulse spraying, and paused states based on changes in pressure within container 1. However, these changes in internal operating states rely entirely on the device's own control system, which the operator cannot directly perceive. In actual farming environments, the environment is often very noisy. The noise from ventilation equipment, chicken calls, and personnel movement often masks the subtle sounds that the device may make during operation. Simultaneously, the operator's gaze must be focused on the chicken's cloaca and the spraying operation, making it difficult to observe any possible indicator lights or pressure gauges. When the device automatically switches to pulse spraying mode due to excessive pressure, the operator may mistakenly believe that the device is still spraying normally, failing to realize that the amount of medication sprayed in a single application has been dispersed. Conversely, when the device automatically pauses drug delivery due to insufficient pressure, the operator may not notice that the spraying has been interrupted and may still be waiting for the medication to be sprayed, causing operational pauses or repeated ineffective actions. This information blind spot prevents the operator from adjusting the operation in a timely manner, such as blindly increasing the pressure in pulse mode or waiting too long in a low-pressure state, thus affecting the accuracy and continuity of drug delivery.

[0065] To address the information transmission problem in human-computer interaction, this embodiment adds a tactile feedback module to the above-mentioned technical solution. This module includes a miniature vibration motor that can be installed inside or on the surface of the handle 3. The miniature vibration motor can be a flat button-type vibration motor or a cylindrical vibration motor. Its small size allows it to be easily embedded in the pre-reserved mounting slot inside the handle 3, or glued to a recess on the surface of the handle 3. The motor's leads are electrically connected to an electronic timer via a flexible circuit board or wires, receiving control signals from the electronic timer. The electronic timer has at least three different vibration modes preset, each corresponding to a specific operating state of the drug delivery device.

[0066] When the device enters its first working state, i.e., normal spraying state, the push-button spray switch valve 5 opens normally. The pressure monitoring module determines that the current pressure value is within the safe range between the first and second pressure thresholds. The electronic timer controls the micro vibration motor to vibrate continuously at a first preset frequency and amplitude. This continuous vibration can be set to vibrate 30 times per second with an amplitude of 0.5 mm, allowing the operator to feel a stable and normal sensation through their palm, indicating that the current pressure is appropriate and the liquid is continuously spraying out. The operator only needs to maintain the current operation.

[0067] When the device enters its second operating state, namely the pressure-limiting pulse injection state, due to excessive pressure, the electronic timer controls the push-button injection switch valve 5 to open intermittently in a pulse manner. Simultaneously, it controls the micro-vibration motor to perform intermittent pulse vibration at a second preset frequency and amplitude. The frequency of this pulse vibration can be correlated with the intermittent opening frequency of the switch valve. For example, if the switch valve opens for 0.15 seconds and closes for 0.4 seconds, the vibration motor will also pulse vibrate at the same rhythm of 0.15 seconds of vibration followed by 0.4 seconds of cessation. The operator, through the rhythmic pulse vibration perceived by the handpiece, can clearly recognize that they are currently in pulse mode and that the liquid is being sprayed intermittently. This allows them to understand that the amount of liquid sprayed in a single burst is dispersed, preventing them from mistakenly believing the spray is abnormal and blindly increasing the pressure or prematurely moving the nozzle.

[0068] When the device enters the third operating state (underpressure pause state) due to insufficient pressure, the push-button injection switch valve 5 closes, injection stops, and the electronic timer controls the micro vibration motor to emit intermittent, indicative vibration alarms at a third preset frequency and amplitude. This indicative vibration can be set to a short, intermittent vibration of 0.3 seconds every 1 second, immediately alerting the operator to the need for pressure replenishment, allowing them to promptly pull the pressure booster rod 9 to replenish pressure. When the operator replenishes pressure to above the first pressure threshold and the switch valve remains in the triggered state, the device automatically resumes injection, and the vibration mode switches back to the continuous vibration of the first operating state.

[0069] Through this tactile feedback mechanism, the complex pressure changes and operating mode switching within the device are transformed into clear signals directly perceived by the human hand. In noisy farming environments, operators do not need to be distracted by observing indicator lights or listening to sounds; they can simply rely on the tactile sensation of holding the device to know in real time whether it is in normal spraying, pulse spraying, or low-pressure pause mode, and make corresponding operational adjustments accordingly. This design effectively compensates for information blind spots in human-machine interaction, avoids misoperations caused by missing information, ensures the continuity and accuracy of the drug delivery process, and allows operators to focus more on holding the chicken and the insertion action itself.

[0070] In another technical solution, the push-button injection switch valve 5 is provided with a knob-type flow regulator with at least two positions, and the adjustment end of the knob-type flow regulator is exposed to the outside of the push-button injection switch valve 5. The electronic timer has at least two drug delivery modes corresponding to at least two gear positions. Each drug delivery mode corresponds to a set of preset injection parameters. The injection parameters include a preset threshold for the total effective injection duration matched with the gear position and the pulse activation duration and interval of the pressure monitoring module in the pressure-limited pulse injection state. When the operator manually rotates the rotary flow regulator to a certain position, the push-button injection switch valve 5 sends a mode switching signal to the electronic timer. The electronic timer responds to the mode switching signal and automatically calls the drug administration mode corresponding to that position, and controls the opening and closing of the push-button injection switch valve 5 and the pulse injection logic of the pressure monitoring module according to the preset injection parameters in the drug administration mode. The at least two gear positions include: The first setting corresponds to the low-flow dosing mode, which is suitable for chicks aged 1-20 days. In the low-flow dosing mode, the electronic timer is preset to a single spray duration of 0.3-0.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.08-0.1 seconds, and the interval between two adjacent activations is 0.4-0.6 seconds. The second setting corresponds to the medium flow dosing mode, which is suitable for chickens aged 21-70 days. In the medium flow dosing mode, the electronic timer is preset to a single spray duration of 0.8-1.2 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.15-0.25 seconds, and the interval between two adjacent activations is 0.3-0.5 seconds. The third setting corresponds to the high-flow dosing mode, which is suitable for chickens over 71 days old. In the high-flow dosing mode, the electronic timer is preset to a single spray duration of 1.5-2.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.25-0.35 seconds, and the interval between two adjacent activations is 0.2-0.4 seconds.

[0071] In drug delivery devices with pressure monitoring and pulse injection functions, although they can automatically switch between continuous injection and pulse injection modes based on pressure changes within container 1, effectively reducing the risk of excessive pressure impacting the cloacal mucosa, the pulse parameters in this scheme remain fixed. In actual farming, chickens range greatly in age, from newly hatched chicks to adult chickens hundreds of days old, with fundamental differences in cloacal volume, mucosal sensitivity, and the amount of medication required per dose. For chicks aged 1 to 20 days, the cloaca is extremely small and fragile, requiring a very low-impact drug delivery method. The 0.1 to 0.2-second spray volume per pulse in fixed pulse mode may still be too high for chicks, easily causing mucosal irritation or medication spillage. For adult chickens over 71 days old, the cloacal volume is larger and the mucosa is more tolerant. The 0.1 to 0.2 seconds of spray volume per pulse in the fixed pulse mode is insufficient. A longer total spray duration and a more frequent pulse frequency are needed to deliver sufficient medication to the deep intestines. Fixed pulse parameters cannot simultaneously meet the physiological needs of chickens of different ages. If the overall parameters are weakened to suit chicks, the medication administration efficiency in adult chickens will be low and the medication will be difficult to reach deep into the intestines. If the parameters are strengthened to suit adult chickens, the mucosa of chicks will be at risk of damage.

[0072] To address this contradiction, this embodiment further improves the push-button injection switch valve 5 and the electronic timer based on the aforementioned technical solution. The push-button injection switch valve 5 contains a three-position rotary flow regulator. The adjustment end of this regulator is exposed outside the switch valve, allowing the operator to select the position by rotating it with their finger. The rotary flow regulator can employ a multi-turn potentiometer or encoder structure, with its internal brush outputting different resistance values ​​or pulse signals at different positions, representing different position information. The electronic timer is preset with three drug delivery modes corresponding to these three positions. Each mode includes a complete set of injection parameters, including a preset threshold for the total effective injection time matched to the position, and the pulse opening duration and interval when the pressure is too high and the pressure-limiting pulse injection state is entered.

[0073] The first setting corresponds to a low-flow dosing mode, suitable for chicks aged 1 to 20 days. When the operator rotates the knob to the first setting, the press-type spray switch valve 5 sends a mode switching signal to the electronic timer, which automatically recalls the preset parameters for the low-flow dosing mode. In this mode, the total duration of a single spray is preset to 0.3-0.5 seconds, which can be set to 0.4 seconds according to actual needs. When the pressure is too high and a pulse spray mode is required, the duration of each activation is preset to 0.08-0.1 seconds, for example, 0.09 seconds, and the interval between two consecutive activations is preset to 0.4-0.6 seconds, for example, 0.5 seconds. This extremely short single activation time and relatively long interval ensure that the amount of liquid sprayed each time is extremely small, with very low impact force, perfectly matching the physiological characteristics of the small and fragile cloaca of chicks and avoiding mechanical damage.

[0074] The second setting corresponds to the medium-flow dosing mode, suitable for chickens aged 21-70 days. When the knob is turned to the second setting, the electronic timer automatically activates the medium-flow dosing mode. In this mode, the total duration of a single spray is preset to 0.8-1.2 seconds, for example, 1.0 second. When entering pulse spray mode, the duration of each pulse is preset to 0.15-0.25 seconds, for example, 0.2 seconds, and the interval between two consecutive pulses is preset to 0.3-0.5 seconds, for example, 0.4 seconds. Compared to the low-flow mode, this parameter combination extends the total duration of a single spray, increases the pulse activation time, and shortens the interval time, providing a larger volume of medication to meet the physiological needs of chickens aged 21-70 days.

[0075] The third setting corresponds to the high-flow dosing mode, suitable for adult chickens over 71 days old. When the knob is turned to the third setting, the electronic timer automatically activates the high-flow dosing mode. In this mode, the total duration of a single spray is preset to 1.5 to 2.5 seconds, for example, 2.0 seconds. When entering pulse spray mode, the duration of each activation is preset to 0.25-0.35 seconds, for example, 0.3 seconds, and the interval between two consecutive activations is preset to 0.2-0.4 seconds, for example, 0.3 seconds. This mode has the longest total spray duration, the longest pulse activation time, and the shortest interval time, enabling sufficient medication to be sprayed deep into the cloaca in a short time, ensuring that adult chickens receive a sufficient dose of medication.

[0076] In actual use, the operator only needs to rotate the knob on the push-button spray valve 5 to the corresponding position according to the age of the chickens to be treated that day, and then complete the preparation of the medicine solution, selection of the nozzle, and pressurization of container 1 according to the aforementioned implementation method. During the subsequent spraying process, whether the device is in continuous spraying mode or enters pulse spraying mode due to excessive pressure, the electronic timer is controlled according to the preset parameters corresponding to the selected position. When excessive pressure triggers pulse spraying, the duration and interval of the pulse are automatically adopted from the corresponding values ​​of that position, matching the preset threshold of the total duration of a single spray.

[0077] Through this interconnected design of a mechanical multi-position knob and an electronic timer with multi-mode drug delivery logic, the operator only needs to rotate one knob according to the chicken's age to simultaneously adjust two key parameters: the total duration of a single spray and the pulse spray duty cycle. In low-flow mode, the extremely short single-use time ensures safety in the chick stage; in high-flow mode, the longer total duration of a single spray and the dense pulse frequency ensure efficacy in adult chickens; and the medium-flow mode provides a smooth transition. This design allows the same drug delivery device to consistently match the physiological characteristics of the chicken's current age with the most suitable parameters throughout its entire growth cycle. This avoids the problem of insufficient efficacy in adult chickens due to overall parameter weakening to suit chicks, and also avoids the risk of mucosal damage in chicks due to overall parameter strengthening to suit adult chickens. It achieves precise and phased cloacal drug delivery, and the operator can complete parameter adjustment with a single click without any professional knowledge.

[0078] In another technical solution, the electronic timer includes an accumulation timing module, which is electrically connected to the electromagnetic drive mechanism of the push-type injection switch valve 5. It is used to monitor and accumulate the actual time that the push-type injection switch valve 5 is in the open state in real time. The total effective injection time is the actual valve opening accumulation time recorded by the accumulation timing module. When the push-button injection switch valve 5 is triggered, the electronic timer starts the cumulative timing module, which begins to record the actual opening time of the push-button injection switch valve 5 and compares the cumulative opening time with the preset threshold. If the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold during the drug administration process, the electronic timer responds to the pressure limiting signal and controls the press-type injection switch valve 5 to open intermittently in a pulse manner. During this period, the cumulative timing module only counts during the actual opening time of the switch valve, and pauses the timing during the interval when the switch valve is closed. When the cumulative opening time recorded by the cumulative timing module reaches the preset threshold, regardless of the pressure state at this time, the electronic timer sends a power-off signal to the electromagnetic drive mechanism to close the press-type injection switch valve 5, thereby ending the current drug administration. If the pressure value drops below the second pressure threshold in pulse mode, the electronic timer resumes continuous injection, and the cumulative timing module continues to accumulate the actual on-time until the preset threshold is reached.

[0079] In drug delivery devices with pressure monitoring and pulse injection functions, although they can automatically switch to pulse mode based on pressure changes within container 1 to reduce the impact of excessive pressure on the cloacal mucosa, the timing method still uses traditional absolute time. In actual use, when the device enters pulse injection mode due to excessive pressure, the valve opens intermittently, for example, opening for 0.15 seconds and closing for 0.4 seconds each time. If the electronic timer continues to run according to absolute time, then when the operator perceives the injection action as lasting 1 second, the actual cumulative opening time of the valve may only be about 0.3 seconds, resulting in a significant reduction in the amount of medication injected. This timing logic does not match the actual drug delivery situation, leading to a core problem: although the operator waits for a sufficient amount of time according to the preset threshold, the actual dosage of medication entering the chicken's cloaca is severely insufficient, directly affecting the treatment effect. Especially when pressure fluctuates frequently and pulse mode is used multiple times, the deviation between the actual dosage and the expected dosage may be even greater, making precise drug delivery difficult to achieve.

[0080] To address the issue of the timing logic being disconnected from dosage control, this embodiment further improves the electronic timer based on the aforementioned technical solution by adding an accumulation timing module. This accumulation timing module is electrically connected to the electromagnetic drive mechanism of the push-button injection switch valve 5 and is specifically used to monitor and accumulate the actual open time of the switch valve in real time. The accumulation timing module can be implemented using the timer / counter resources within a microcontroller. Its working principle is as follows: the timer only starts counting when the electromagnetic drive mechanism is energized and the valve is actually open; when the electromagnetic drive mechanism is de-energized and the valve is closed, the timer stops counting.

[0081] When the operator completes all preparations according to the aforementioned implementation method and presses the push handle of the push-button injection switch valve 5, the electronic timer starts the cumulative timing module, which begins recording the actual opening time of the switch valve. During injection, if the pressure monitoring module determines that the current pressure value is normal, the valve remains open, and the cumulative timing module continuously times the valve. If the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold, the electronic timer responds to the pressure limiting signal and controls the valve to open intermittently in a pulse manner. During this period, the cumulative timing module only times the valve is actually open, and automatically pauses timing during the valve closing interval. For example, when the valve is open for 0.15 seconds, the timer increments by 0.15 seconds, and then the timer remains unchanged during the 0.4-second valve closure period. When the valve is open for another 0.15 seconds, the timer increments by 0.15 seconds again, and so on. The cumulative timing module always compares the accumulated opening time with the preset threshold.

[0082] When the accumulated opening time recorded by the cumulative timing module reaches a preset threshold, such as 0.5 seconds or 1 second, regardless of the pressure state inside container 1 or whether it is in continuous injection mode or pulse injection mode, the electronic timer sends a power-off signal to the electromagnetic drive mechanism, causing the push-button injection switch valve 5 to close, thus ending the current drug administration. If the pressure value drops below the second pressure threshold in pulse mode, the electronic timer resumes continuous injection mode, and the cumulative timing module continues to accumulate the actual opening time until the preset threshold is reached. Throughout the drug administration process, the operator may feel that the device has been working for a long time, but due to the presence of the cumulative timing module, the actual accumulated valve opening time is precisely controlled.

[0083] Through this cumulative timing design, the total effective spraying time is no longer equal to the absolute time the operator presses the valve, but strictly corresponds to the cumulative time of the actual valve opening and the actual spraying of the medication. Regardless of how the spraying mode switches due to pressure fluctuations, the total amount of medication actually sprayed during a single administration always remains consistent with the dose represented by the preset threshold. For example, setting a preset threshold of 1 second, whether this 1 second is completed continuously or accumulated over multiple pulse interruptions, the final amount of medication sprayed into the cloaca is equivalent to that of continuous spraying for 1 second. This design fundamentally avoids the dose wastage problem caused by pulse spraying, ensuring that the dose of a single administration is always accurate and reliable regardless of pressure fluctuations or the number of pulse mode interventions, thus guaranteeing the consistency of treatment effects. At the same time, this scheme is compatible with the aforementioned multi-level flow regulator, and the cumulative timing module is controlled according to the corresponding preset threshold at different levels, achieving precise dosage administration throughout the entire growth cycle.

[0084] Application Example 1 On September 12, 2025, at a poultry breeding research base in Jiangsu Province, a batch of newly hatched Suqin Yellow Chicken chicks were found to have abnormalities during the selection process. A total of 282 chicks exhibited noticeably swollen abdomens, weak vitality, and poor overall condition. Based on experience, on-site technicians determined that these weak chicks were due to the prolonged storage of the hatching eggs, leading to the proliferation of Salmonella inside the eggs and affecting the normal absorption of the yolk sac in the chicks' abdomens—typical symptoms of Salmonella infection.

[0085] To verify the therapeutic effect of the chicken cloacal drug delivery device of the present invention in practical application, 282 weak chicks were randomly divided into two groups of 141 each. The experimental group was treated with the cloacal drug delivery device of the present invention. During operation, amoxicillin was first diluted with physiological saline to a suitable concentration, poured into the transparent polyethylene container 1 of the drug delivery device, and the cap 2 was tightened. Based on the age characteristics of the chicks, the operator selected the smallest specification spray nozzle 7 with a length of 3mm and a bottom diameter of 1mm, aligned the annular protrusion at its rear end with the insertion tube 6, and pushed it in forcefully until it was locked into the annular groove. Then, the operator held the handle 3, which was integrally formed with the cap 2, and with the other hand, repeatedly pulled the pressure-boosting rod 9 to inject compressed air into the container 1 through the rubber piston in the guide sleeve 8, stopping when a significant increase in pushing and pulling resistance was felt. The operator holds the chick in place with one hand, and gently inserts the spray nozzle 7 into the chick's cloaca with the other. Pressing the handle of the push-button spray valve 5 releases the medication through the medication delivery pipe 4, the valve, the flexible medication conduit, and the spray nozzle 7, all aided by compressed air. Because the spray nozzle 7 has a hemispherical closed structure at its front end, with multiple 0.3mm diameter micro-holes evenly distributed in the hemispherical area and on its sidewalls, the medication is sprayed simultaneously from these micro-holes, creating a multi-angle diffused distribution within the cloaca and evenly covering the mucous membrane surface. An electronic timer automatically starts when the valve is triggered. Since the subjects in this experiment were chicks under 42 days old, the timer's preset threshold was set to 0.5 seconds. When the spray time reaches 0.5 seconds, the electronic timer automatically cuts off the power to the electromagnetic drive mechanism, the valve closes, and the single administration is complete. The control group received the medication via drinking water, with the same concentration of amoxicillin added to the drinking water for the chicks to drink freely. Both groups received continuous treatment for 3 days, and the recovery of the chicks in both groups was compared at 1 week of age. The criteria for judging the treatment effect were: the abdomen returned to normal shape and no longer bulged, feeding behavior was normal, and the chicks were active. Statistical results showed that in the control group of 141 weak chicks, 8 died, 22 were culled, and 81 met the improvement criteria; while in the experimental group of 141 weak chicks, only 2 died, 2 were culled, and 115 met the improvement criteria.

[0086] Application Example 2 On September 20, 2025, at a poultry breeding research base in Jiangsu Province, researchers used Suqin Yellow Chicken chicks hatched on September 12, 2025, as experimental subjects. 300 healthy chicks were randomly selected and divided into two groups of 150 each. All selected chicks were artificially challenged to infect them with E. coli. Treatment was initiated once the chicks exhibited typical E. coli symptoms.

[0087] The experimental group was treated using the chicken cloacal drug delivery device described in this invention. During operation, neomycin sulfate was first diluted with physiological saline to a therapeutic concentration, poured into container 1 of the drug delivery device, and the cap 2 was tightened. Considering the experimental chicks were only 8 days old, belonging to the chick stage, the operator selected the smallest specification spray nozzle 7 with a length of 3mm and a bottom diameter of 1mm, aligned the annular protrusion at its rear end with the insertion tube 6, and pushed it in until it was locked into the annular groove. Then, the operator held the handle 3 and repeatedly pulled the pressure boosting rod 9, injecting compressed air into container 1 through the rubber piston in the guide sleeve 8. When a significant increase in pushing and pulling resistance was felt, it indicated that the pressure was sufficient. The operator held the chick with one hand and gently inserted the spray nozzle 7 into the chick's cloaca with the other hand, pressing the handle of the push-button spray switch valve 5. The drug solution was sprayed out through the drug delivery pipe 4, the switch valve, the flexible drug delivery conduit, and the spray nozzle 7 under the action of compressed air. The nozzle 7 has a hemispherical closed structure at its front end. Multiple micro-holes with a diameter of 0.3 mm are evenly distributed in the hemispherical area and on the sidewalls. The medication is sprayed simultaneously from these micro-holes, forming a multi-angle diffused distribution within the cloaca, evenly covering the mucosal surface. An electronic timer automatically starts timing when the valve is triggered. Since the subjects in this experiment were chicks under 42 days old, the operator set the timer's preset threshold to 0.5 seconds. During spraying, the pressure monitoring module collects the pressure value inside container 1 in real time and compares it with the preset threshold. When the spraying time reaches 0.5 seconds, the electronic timer automatically cuts off the power to the electromagnetic drive mechanism, the valve closes, and the single administration ends. If the pressure exceeds the second pressure threshold of 0.15 MPa during spraying, the electronic timer automatically switches to pulse spray mode, starting for 0.1 seconds with a 0.4-second interval, until the pressure drops back to a safe range, then resumes continuous spraying to protect the delicate cloacal mucosa of the chicks. The control group received medication via drinking water, with the same concentration of neomycin sulfate added to the drinking water for the chickens to drink freely. Both groups were treated continuously for 3 days, followed by a 4-day observation period after medication was stopped. On the 7th day, the treatment effects of the two groups of chickens were compared and statistically analyzed. The results showed that in the control group of 150 chicks, 22 died, 18 were culled, and the number of chicks that responded to treatment was 51; while in the experimental group of 150 chicks, 8 died, 6 were culled, and the number of chicks that responded to treatment reached 114.

[0088] Application Example 3 On November 9, 2025, at a poultry breeding research base in Jiangsu Province, researchers used Suqin Yellow Chicken pullets, which hatched on September 12, 2025, as experimental subjects. Two hundred healthy pullets were randomly selected and divided into two groups of 100 each. All selected pullets were artificially challenged to infect them with E. coli. Treatment was initiated once the chickens exhibited typical E. coli symptoms.

[0089] The experimental group was treated using the chicken cloacal administration device described in this invention. During operation, florfenicol was first diluted with physiological saline to a therapeutic concentration, poured into the transparent polyethylene container 1 of the administration device, and the cap 2 was tightened. The subjects in this experiment were 58-day-old pullets, belonging to the 43-70 day age range. The operator selected a spray nozzle 7 with a length of 7mm and a bottom diameter of 2mm based on the chicken's age, aligned the annular protrusion at its rear end with the insertion tube 6, and pushed it in forcefully until the annular protrusion was completely locked into the annular groove. Then, the operator held the handle 3, which was integrally formed with the cap 2, and with the other hand, repeatedly pulled the pressure boosting rod 9, injecting compressed air into the container 1 through the rubber piston in the guide sleeve 8. When a significant increase in pushing and pulling resistance was felt, it indicated that sufficient pressure had been built up inside the container 1. The operator held the chicken with one hand and gently inserted the spray nozzle 7 into the pullet's cloaca with the other hand, pressing the handle of the push-button spray switch valve 5. The medication is sprayed out through the medication delivery pipe 4, the switch valve, the flexible medication conduit, and the spray nozzle 7 under the action of compressed air. The spray nozzle 7 has a hemispherical closed structure at the front end, with multiple micro-holes of 0.4 mm in diameter evenly distributed in the hemispherical area and sidewalls. The medication is sprayed out from multiple micro-holes simultaneously, forming a multi-angle diffuse distribution in the cloaca and evenly covering the mucosal surface. The electronic timer automatically starts timing when the switch valve is triggered. Since the subjects in this experiment were all pullets over 42 days old, the operator set the preset threshold of the timer to 1 second. During the spraying process, the pressure monitoring module collects the pressure value in real time through the pressure sensor set on the inner wall of container 1, and compares it with the preset first pressure threshold of 0.05 MPa and the second pressure threshold of 0.15 MPa by the comparator. When the spraying time reaches 1 second, the electronic timer automatically cuts off the power to the electromagnetic drive mechanism, the valve closes, and the single administration ends. If the pressure exceeds the second pressure threshold during spraying, the electronic timer will automatically switch to pulse spray mode, with each pulse lasting 0.15 seconds and an interval of 0.4 seconds, until the pressure drops back to a safe range, at which point continuous spraying resumes. This ensures efficient drug administration while avoiding damage to the cloacal mucosa. The control group received conventional drinking water administration, with the same concentration of florfenicol added to the drinking water for the chickens to drink freely. Both groups were treated continuously for 3 days, followed by a 4-day observation period after drug withdrawal. On day 7, the treatment effects of the two groups were compared and statistically analyzed. The results showed that in the control group of 100 growing chickens, 9 died, 8 were culled, and the effective treatment count was 66; while in the experimental group of 100 growing chickens, only 1 died, 3 were culled, and the effective treatment count reached 86.

[0090] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A cloacal drug delivery device for chickens, comprising a container for holding a liquid medicine and a lid fitted onto the container, characterized in that, Also includes: The handle is located on the cover, and the handle and the cover are a single molded plastic component; A pressurization structure, which is connected to the interior of the container, is used to increase the pressure inside the container; The spraying structure includes a liquid delivery pipe, a press-type spray switch valve, a liquid delivery conduit, and a spray nozzle assembly. The central area of ​​the cover has a through-hole. The liquid delivery pipe is a rigid pipe that passes through the mounting hole and extends to the bottom of the container. The upper end of the liquid delivery pipe protrudes from the cover and is connected to the press-type spray switch valve. The outlet of the press-type spray switch valve is connected to a flexible liquid delivery conduit. The end of the liquid delivery conduit is fixedly connected to a rigid insertion pipe, and the outer wall of the insertion pipe is provided with an annular groove. The spray gun head is a conical tube with a small front end and a large rear end. The inner wall of the rear opening of the spray gun head is provided with an annular protrusion that matches the annular groove so that the spray gun head and the insertion tube can be detachably fixed. An electronic timer is fixedly installed on the top of the cover. The control terminal of the electronic timer is connected to the electromagnetic drive mechanism inside the push-button injection switch valve via a signal line. The electronic timer is used to start timing when the push-button injection switch valve is triggered, and to send a power-off signal to the electromagnetic drive mechanism when the total effective injection time reaches a preset threshold, so that the push-button injection switch valve is closed. The electronic timer can provide auxiliary control over the opening and closing state of the push-button injection switch valve according to preset logic.

2. The chicken cloacal drug delivery device according to claim 1, characterized in that, The pressurizing structure includes a cylindrical guide sleeve mounted on the cover, a pressurizing rod that slides back and forth inside the guide sleeve, and a rubber piston fixedly connected to one end of the pressurizing rod inside the guide sleeve. The outer edge of the rubber piston fits tightly against the inner wall of the guide sleeve. An air inlet is provided on the side wall of the guide sleeve near the cover. A one-way valve is provided at the bottom of the guide sleeve, which allows gas to enter the container from the guide sleeve but prevents gas or liquid in the container from flowing back into the guide sleeve. The pressurizing rod, guide sleeve, rubber piston, and one-way valve together constitute a manual air pump structure.

3. The chicken cloacal drug delivery device according to claim 1, characterized in that, The spray gun head is integrally injection molded from medical-grade polypropylene material. The spray gun head is available in the following 5 specifications: a spray gun head with a length of 3mm has a bottom diameter of 1mm; a spray gun head with a length of 5mm has a bottom diameter of 1.5mm; a spray gun head with a length of 7mm has a bottom diameter of 2mm; a spray gun head with a length of 10mm has a bottom diameter of 2mm; and a spray gun head with a length of 15mm has a bottom diameter of 2.5mm.

4. The chicken cloacal drug delivery device according to claim 1, characterized in that, The front end of the spray gun head is closed and hemispherical. Multiple microholes with a diameter of 0.3-0.5mm are opened on the hemispherical area at the front end of the spray gun head and on the side wall near the front end. The multiple microholes are evenly distributed.

5. The chicken cloacal drug delivery device according to claim 1, characterized in that, In the basic state, the preset threshold is set to 0.5 seconds or 1 second based on the age of the chicken. Chickens under 42 days old are preset to 0.5 seconds, while chickens 42 days old and above are preset to 1 second.

6. The chicken cloacal drug delivery device according to claim 1, characterized in that, The electronic timer is also connected to a pressure monitoring module, which includes a pressure sensor disposed on the inner wall of the container and a comparator electrically connected to the pressure sensor. The comparator is preset with a first pressure threshold and a second pressure threshold. The first pressure threshold corresponds to the minimum pressure required to start the jet, and the second pressure threshold corresponds to the maximum pressure to prevent damage to the cloaca. The pressure sensor is used to collect the current pressure value inside the container in real time and send the current pressure value to the comparator; The comparator is used to compare the current pressure value with a first pressure threshold and a second pressure threshold. When the push-button injection switch valve is triggered, the electronic timer starts timing, and the pressure monitoring module starts monitoring the pressure at the same time. If the comparator determines that the current pressure value is lower than the first pressure threshold during the timing process, the comparator sends an interrupt signal to the electronic timer. The electronic timer responds to the interrupt signal by pausing the timing and simultaneously sends a power-off signal to the electromagnetic drive mechanism in the push-button injection switch valve, causing the push-button injection switch valve to close. The electronic timer automatically resumes timing and restores the push-button injection switch valve to the open state when the operator pressurizes the pressure again through the pressurization structure to raise the current pressure value back above the first pressure threshold and the push-button injection switch valve remains in the triggered state. If the comparator determines that the current pressure value is higher than the second pressure threshold during the timing process, the comparator sends a pressure limiting signal to the electronic timer. In response to the pressure limiting signal, the electronic timer controls the push-button injection switch valve to open intermittently in a pulse manner. The duration of each opening is 0.1-0.2 seconds, and the interval between two adjacent openings is 0.3-0.5 seconds, until the current pressure value falls back below the second pressure threshold and the total effective injection time does not reach the preset threshold, at which point the continuous injection state is restored.

7. The chicken cloacal drug delivery device according to claim 6, characterized in that, It also includes a haptic feedback module electrically connected to the electronic timer; The tactile feedback module includes a miniature vibration motor disposed inside or on the surface of the handle; The electronic timer has at least two different vibration modes preset within it, each vibration mode corresponding to a specific operating state of the drug delivery device, the specific operating state including: The first working state is the normal working state in which the press-type injection switch valve is normally open and the pressure monitoring module determines that the current pressure value is between the first pressure threshold and the second pressure threshold. The second working state is a pressure-limiting pulse injection state in which the electronic timer controls the push-type injection switch valve to open intermittently in a pulse manner when the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold. And the third working state, which is the underpressure pause state in which the press-type injection switch valve is closed when the pressure monitoring module determines that the current pressure value is lower than the first pressure threshold; When the drug delivery device enters the first working state, the electronic timer controls the micro vibration motor to vibrate continuously at a first preset frequency and amplitude; When the drug delivery device enters the second working state, the electronic timer controls the micro vibration motor to perform intermittent pulse vibration at a second preset frequency and amplitude, and the pulse frequency is related to the intermittent opening frequency of the press-type injection switch valve. When the drug delivery device enters the third working state, the electronic timer controls the micro vibration motor to emit intermittent, suggestive vibration alarms at a third preset frequency and amplitude.

8. The chicken cloacal drug delivery device according to claim 6, characterized in that, The push-button injection switch valve is equipped with a rotary flow regulator with at least two positions, and the adjustment end of the rotary flow regulator is exposed to the outside of the push-button injection switch valve. The electronic timer has at least two drug delivery modes corresponding to at least two gear positions. Each drug delivery mode corresponds to a set of preset injection parameters. The injection parameters include a preset threshold for the total effective injection duration matched with the gear position and the pulse activation duration and interval of the pressure monitoring module in the pressure-limited pulse injection state. When the operator manually rotates the rotary flow regulator to a certain position, the push-button injection switch valve sends a mode switching signal to the electronic timer. In response to the mode switching signal, the electronic timer automatically calls the drug administration mode corresponding to that position and controls the opening and closing of the push-button injection switch valve and the pulse injection logic of the pressure monitoring module according to the preset injection parameters in the drug administration mode. The at least two gear positions include: The first setting corresponds to the low-flow dosing mode, which is suitable for chicks aged 1-20 days. In the low-flow dosing mode, the electronic timer is preset to a single spray duration of 0.3-0.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.08-0.1 seconds, and the interval between two adjacent activations is 0.4-0.6 seconds. The second setting corresponds to the medium flow dosing mode, which is suitable for chickens aged 21-70 days. In the medium flow dosing mode, the electronic timer is preset to a single spray duration of 0.8-1.2 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.15-0.25 seconds, and the interval between two adjacent activations is 0.3-0.5 seconds. The third setting corresponds to the high-flow dosing mode, which is suitable for chickens over 71 days old. In the high-flow dosing mode, the electronic timer is preset to a single spray duration of 1.5-2.5 seconds. When entering the pressure-limited pulse spray state, the duration of each activation is 0.25-0.35 seconds, and the interval between two adjacent activations is 0.2-0.4 seconds.

9. The chicken cloacal drug delivery device according to claim 6, characterized in that, The electronic timer includes an accumulation timing module, which is electrically connected to the electromagnetic drive mechanism of the push-button injection switch valve. It is used to monitor and accumulate the actual time that the push-button injection switch valve is in the open state in real time. The total effective injection time is the actual valve opening accumulation time recorded by the accumulation timing module. When the push-button injection switch valve is triggered, the electronic timer starts the cumulative timing module, which begins to record the actual opening time of the push-button injection switch valve and compares the cumulative opening time with the preset threshold. If the pressure monitoring module determines that the current pressure value is higher than the second pressure threshold during the drug administration process, the electronic timer responds to the pressure limiting signal and controls the press-type injection switch valve to open intermittently in a pulse manner. During this period, the cumulative timing module only counts during the actual opening time of the switch valve, and pauses the timing during the interval when the switch valve is closed. When the cumulative opening time recorded by the cumulative timing module reaches the preset threshold, regardless of the pressure state at this time, the electronic timer sends a power-off signal to the electromagnetic drive mechanism to close the press-type injection switch valve, thereby ending the current drug administration. If the pressure value drops below the second pressure threshold in pulse mode, the electronic timer resumes continuous injection, and the cumulative timing module continues to accumulate the actual on-time until the preset threshold is reached.

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