Intelligent anti-blocking solid particle handheld quantitative pesticide application gun

Abstract

The application discloses a kind of intelligent anti-blocking solid particle handheld quantitative pesticide application gun, including medicine storage tube, holding handle, rotating quantitative medicine feeder, dredging mechanism and controller, sensor for detecting whether there is blockage in medicine discharge pipe, discharge channel and quantitative medicine storage hole located in discharge channel is installed on medicine feeder shell, dredging mechanism can dredge medicine discharge pipe, discharge channel and quantitative medicine storage hole located in discharge channel.Using the above structure, whether the problem of blockage occurs can be detected by sensor after each pesticide application, if blockage is detected, automatic dredging can be carried out by dredging mechanism, the whole process does not need manual intervention, and does not need to disassemble and assemble pesticide application gun, improve work efficiency and use feeling, and can ensure long-term stable operation of pesticide application gun, and also can avoid the problem of insufficient pesticide application amount caused by partial blockage, thereby greatly improving the control accuracy of single pesticide application amount.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to an intelligent anti-clogging handheld quantitative sprayer for applying pesticides containing solid particles. Background Technology

[0002] With the development of crop cultivation technology, in order to prevent pests and diseases or promote growth and development, solid granular pesticides or solid granular fertilizers are first applied near the roots of crops before covering them with soil.

[0003] Currently, the application of solid granular pesticides or fertilizers is usually done manually, requiring bending over every time a patch is applied. This is not only very strenuous but also harmful to health in the long run. Therefore, a specialized handheld applicator has been developed. Each press of the button causes a baffle that controls the flow of the feed channel to reciprocate, thus applying the solid granular pesticides or fertilizers. However, in practical use, it has been found that the existing handheld applicator's control over the application amount via the reciprocating movement of the baffle is not precise. Too much or too little application can cause significant side effects, failing to meet the requirements of precision agriculture. Furthermore, because the baffle is located at the top of the handheld applicator, the solid granules have to travel a long distance to fall into the patch. This can lead to insufficient application due to insufficient waiting time for the operator, and the long channel also increases the likelihood of solid granules adhering to the surface, causing some granules to stick to the sides, which also results in insufficient application.

[0004] Therefore, please refer to Chinese Utility Model Patent Publication No. CN219741220U. The applicant of this application designed an intelligent handheld quantitative sprayer for solid granules. Through volume control of the quantitative storage hole, the solid granule pesticide or fertilizer in the storage cylinder is first precisely and quantitatively stored in the quantitative storage hole. Then, by pulling the rotating block, all the solid granule pesticide or fertilizer in the quantitative storage hole is discharged into the pit through the discharge pipe. This not only achieves precise quantitative spraying of solid granule pesticide or fertilizer, meeting the requirements of precision agriculture, but also, because the spraying mechanism is located at the lower end of the long storage cylinder, the discharge pipe can be designed to be very short, greatly shortening the free fall distance of the solid granule pesticide or fertilizer after leaving the quantitative storage hole, and improving the spraying speed. This avoids the problem of some solid particles scattering outside the pit due to insufficient waiting time for the operator, and greatly reduces the risk of solid particles sticking to the wall, further ensuring the accuracy of the solid granule pesticide or fertilizer spraying amount.

[0005] However, the applicant of this application found during long-term use that not only are solid granular fertilizers or pesticides prone to moisture absorption, causing blockages in the metering storage holes, but the high viscosity of the soil in the usage environment also makes the discharge pipes prone to blockages. Therefore, the blockages in both the metering storage holes and the discharge pipes result in the need for frequent disassembly and manual unblocking of the sprayer during use, which affects both operational efficiency and user experience.

[0006] Solving these problems is now a top priority. Summary of the Invention

[0007] In view of this, the present invention provides an intelligent anti-clogging handheld quantitative spray gun for solid particles.

[0008] The technical solution is as follows:

[0009] The first aspect of this application relates to an intelligent anti-clogging handheld quantitative drug dispensing gun for solid particles, comprising a hollow cylindrical drug storage cylinder and a grip handle and a rotary quantitative drug dispenser respectively installed at the upper and lower ends of the drug storage cylinder. The grip handle is provided with a drug dispensing switch. The rotary quantitative drug dispenser comprises a drug dispenser housing fixedly installed at the lower end of the drug storage cylinder, a drug dispensing turntable rotatably installed in the drug dispensing housing, a turntable control component for driving the drug dispensing turntable to rotate, and a drug discharge pipe installed at the lower part of the drug dispensing turntable. The drug dispensing turntable has at least one quantitative drug storage hole. The drug dispensing housing has a feed trough communicating with the lower end of the drug storage cylinder and a discharge channel communicating with the upper end of the drug discharge pipe. The turntable control component enables each quantitative drug storage hole to first complete the storage in the feed trough and then move to the discharge channel one by one to discharge the drug into the discharge pipe. The drug dispensing housing is equipped with a sensor for detecting whether there is blockage in the drug discharge pipe, the discharge channel, and the quantitative drug storage hole located in the discharge channel.

[0010] It also includes a dredging mechanism and a controller. The dredging mechanism can dredge the discharge pipe, the discharge channel and the quantitative storage hole in the discharge channel. The controller can control the dredging mechanism according to the detection results of the sensor and control the turntable control component according to the start signal of the application switch.

[0011] The above-mentioned intelligent anti-clogging handheld quantitative sprayer for solid particles can detect whether there is any blockage in the quantitative storage hole, discharge channel and discharge pipe after each application. If a blockage is detected, it can be automatically cleared by the unblocking mechanism. The whole process does not require manual intervention or disassembly of the sprayer, which improves the work efficiency and user experience. It can also ensure the long-term stable operation of the sprayer and avoid the problem of insufficient spraying due to partial blockage, thereby greatly improving the control accuracy of the single application.

[0012] In some embodiments, the rotation axis of the drug delivery turntable coincides with the central axis of the drug storage cylinder, and the drug delivery turntable has a plurality of quantitative drug storage holes evenly distributed along its rotation axis.

[0013] When any one of the metering storage holes is located in the discharge channel, the remaining metering storage holes are located in the feed trough.

[0014] In some embodiments, a ring of driven teeth is formed on the outer circumferential surface of the drug delivery turntable, and the turntable control assembly includes a servo motor mounted on the drug delivery device housing and a drive gear synchronously mounted on the servo motor shaft, the drive gear meshing with the driven teeth.

[0015] In some embodiments, the unblocking mechanism includes a gas cylinder connector mounted on the top of the handle, the gas cylinder connector having a gas delivery channel, one end of which is connected to a high-pressure gas cylinder and the other end of which is connected to an exhaust nozzle. An air inlet is installed at the upper end of the discharge channel and is connected thereto. The exhaust nozzle is connected to the air inlet via a gas delivery pipe. A plug for controlling the opening and closing of the gas delivery channel and a gas shut-off retaining device for causing the plug to tend to block the gas delivery channel are movably installed in the gas delivery channel. A ventilation control device is installed in the handle to prevent the plug from blocking the gas delivery channel.

[0016] In some embodiments, the end of the gas delivery channel away from the high-pressure gas storage cylinder is narrowed to form a plug guide hole. The end of the plug guide hole away from the high-pressure gas storage cylinder is connected to the interior of the handle. The wall of the plug guide hole is connected to the air inlet through a branch air passage. A first conical surface with a radius gradually decreasing towards the plug guide hole is formed between the gas delivery channel and the plug guide hole. The plug includes a plug body and a sliding fitting rod arranged coaxially. The plug body is a cylindrical structure with a diameter smaller than that of the gas delivery channel. The diameter of the sliding fitting rod is smaller than that of the plug body and slides with the plug guide hole. The cross-section of the plug body near the sliding fitting rod is a second conical surface that can cooperate with the first conical surface. An air seal is provided between the end of the plug guide hole near the handle and the sliding fitting rod. The end of the sliding fitting rod away from the plug body extends outward through the plug guide hole.

[0017] The gas cut-off retention device includes a spring support seat fixedly installed at one end of the gas transmission channel near the high-pressure gas storage cylinder and a compression spring elastically supported between the adjacent end faces of the spring support seat and the plug body. The spring support seat has a vent hole that connects the high-pressure gas storage cylinder and the gas transmission channel.

[0018] The ventilation control device is an electromagnetic push rod, and the outer end face of the push rod is directly opposite the end face of the sliding fitting rod that passes through the guide hole of the plug.

[0019] In some embodiments, an anti-clogging sleeve is installed at the lower end of the discharge pipe. The anti-clogging sleeve includes a mounting part fitted onto the lower end of the discharge pipe and a flared opening integrally formed at the lower end of the mounting part. The flared opening is a conical structure with a diameter that gradually increases from top to bottom.

[0020] In some implementations, the controller includes:

[0021] MCU;

[0022] The power module is used to supply power to the MCU;

[0023] The material feeding execution module is used to send the signal from the application switch to the MCU and control the turntable control component according to the control command issued by the MCU;

[0024] The material feeding detection module is used to control the sensor according to the control instructions issued by the MCU, and then send the signal returned by the sensor to the MCU.

[0025] The unblocking control module is used to control the unblocking mechanism according to the control commands issued by the MCU.

[0026] In some embodiments, the power module includes a first-stage buck circuit and a second-stage buck circuit connected in sequence. The input terminal of the first-stage buck circuit receives the input power, and the output terminal of the second-stage buck circuit outputs the operating voltage to the MCU.

[0027] The material feeding execution module includes a switching circuit and a turntable drive circuit. The switching circuit is provided with a terminal P1 for connecting to the application switch and a terminal P2 for connecting to the MCU. Pin 1 of terminal P1 is connected to the input power supply, pins 2 and 3 of terminal P1 are grounded, pin 4 of terminal P1 is connected to pin 2 of terminal P2, the common terminal of pin 5 of terminal P1 and pin 1 of terminal P2 is grounded, and pin 6 of terminal P1 is connected to the OUT terminal of the application switch. The turntable drive circuit includes a terminal H2 for connecting to the turntable control component. Pin 1 of terminal H2 is connected to the output terminal of the second-stage step-down circuit, and a capacitor C14 is connected in series with pin 1 before grounding. Pin 2 of terminal H2 is connected to the PWM_DJ terminal of the MCU, and pin 3 of terminal H2 is grounded.

[0028] The material feeding detection module is provided with a terminal H3 for connecting to a sensor. Pin 1 of terminal H3 is connected to the input power supply. Pin 1 is also connected to ground after being connected in series with capacitor C15. Pin 2 of terminal H3 is connected to the input power supply after being connected in series with resistor R20. Pin 2 is also connected to the LL_CHK terminal of the MCU. Pin 3 of terminal H3 is grounded.

[0029] The unblocking control module is equipped with a terminal P3 for connecting the unblocking mechanism. Pin 2 of terminal P3 is grounded, and pin 1 of terminal P3 is connected to the normally open terminal of relay RLY1. The common terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit, and the voltage input terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit. The control terminal of relay RLY1 is connected to the collector of NPN transistor Q1, and the voltage input terminal of relay RLY1 is connected to the cathode of switching diode D1. The anode of switching diode D1 is connected to the collector of NPN transistor Q1, and the emitter of NPN transistor Q1 is grounded. The base of NPN transistor Q1 is connected to the DC_CTRL terminal of the MCU after series resistor R19, and the base is also connected to the ground after series resistor R18.

[0030] In some embodiments, the controller further includes a wireless communication module, which is equipped with a communication chip U2. The reset pin RST of the communication chip U2 is connected to the output terminal of the power module after a series resistor R10. The reset pin RST is also connected to one end of a shorting point U4, and the other end of the shorting point U4 is grounded. The enable pin EN of the communication chip U2 is connected to the output terminal of the power module after a series resistor R5. The power input terminal VCC of the communication chip U2 is connected to the output terminal of the power module. The ground terminal GND of the communication chip U2 is grounded. The GPIO15 pin of the communication chip U2 is connected to ground after a series resistor R12. The transmitting terminal TXD0 and the receiving terminal RXD0 of the communication chip U2 are connected to the UART2RX terminal and the UART2TX terminal of the MCU, respectively. The GPIO0 pin of the communication chip U2 is connected to the output terminal of the power module after a series resistor R13. The GPIO0 pin is also connected to the switch SW4 after a series connection and then grounded.

[0031] In some embodiments, the controller further includes a USB communication module, which is equipped with a USB communication chip USB1. Both VBUS pins of the USB communication chip USB1 are connected to the input power supply. Both ground terminals of the USB communication chip USB1 are grounded. The two ground terminals are connected in series with a resistor R16 and then connected to the CC1 pin of the USB communication chip USB1. The two ground terminals are also connected in series with a resistor R17 and then connected to the CC2 pin of the USB communication chip USB1. Both SHELL pins of the USB communication chip USB1 are grounded. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the present invention;

[0033] Figure 2 A cross-sectional view of one location of the invention when the unblocking mechanism is not activated;

[0034] Figure 3A cross-sectional view of one location of the invention when the unblocking mechanism is activated;

[0035] Figure 4 This is a cross-sectional view of the invention from another location when the unblocking mechanism is not activated;

[0036] Figure 5 A schematic diagram of the main structure of the turntable control assembly;

[0037] Figure 6 This is the circuit diagram for the MCU.

[0038] Figure 7 This is the circuit diagram for the first-stage step-down circuit;

[0039] Figure 8 This is the circuit diagram for the second-stage step-down circuit;

[0040] Figure 9 This is a circuit diagram of a switching circuit;

[0041] Figure 10 This is the circuit diagram of the turntable drive circuit;

[0042] Figure 11 This is the circuit diagram for the material feeding detection module;

[0043] Figure 12 Circuit diagram for unblocking the control module;

[0044] Figure 13 This is the circuit diagram for the wireless communication module;

[0045] Figure 14 This is the circuit diagram of the USB communication module. Detailed Implementation

[0046] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0047] like Figures 1-5 As shown, an intelligent anti-blocking handheld quantitative spray gun for solid particles mainly includes a storage cylinder 1, a handle 2, a rotating quantitative feeder 3, a dredging mechanism 4, and a controller 5.

[0048] The storage cylinder 1 is a hollow cylindrical structure extending vertically. In this embodiment, the storage cylinder 1 preferably adopts a cylindrical structure, which is easy to process and assemble. A handle 2 is installed at the upper end of the storage cylinder 1 for easy gripping and improved ease of use. A rotary metering dispenser 3 is installed at the lower end of the storage cylinder 1, and an application switch 21 is provided on the handle 2. Each time the application switch 21 is pressed, the rotary metering dispenser 3 dispenses solid granular fertilizer or pesticide once.

[0049] The rotary metering feeder 3 includes a feeder housing 31 fixedly installed at the lower end of the medicine storage cylinder 1, a feeder turntable 32 rotatably installed in the feeder housing 31, a turntable control assembly 33 for driving the feeder turntable 32 to rotate, and a discharge pipe 34 installed at the lower part of the feeder turntable 32. The feeder turntable 32 has at least one metering medicine storage hole 321. The feeder housing 31 has a feed trough 311 communicating with the lower end of the medicine storage cylinder 1 and a discharge channel 312 communicating with the upper end of the discharge pipe 34. The turntable control assembly 33 enables each metering medicine storage hole 321 to first complete the storage in the feed trough 311, and then move to the discharge channel 312 one by one to discharge into the discharge pipe 34.

[0050] Specifically, each time the application switch 21 is pressed, the turntable control component 33 causes the pesticide delivery turntable 32 to rotate at a set angle, thereby moving a metering storage hole 321, which is already filled with solid granular fertilizer or pesticide in the feed trough 311, to the discharge channel 312. The solid granular fertilizer or pesticide falls into the discharge pipe 34 under its own gravity and finally falls freely to the designated location on the ground (usually a pit).

[0051] Therefore, by controlling the volume of the metering storage hole 321, the solid granular pesticides or fertilizers in the storage cylinder 1 are first precisely and quantitatively stored in the metering storage hole 321. Then, by pulling the rotating block 31 to make it rotate, all the solid granular pesticides or fertilizers in the metering storage hole 321 are delivered to the designated location (usually a pit) on the land through the discharge pipe 34. This not only achieves precise and quantitative application of solid granular pesticides or fertilizers, meeting the requirements of precision agriculture, but also, because the application mechanism is located at the lower end of the long storage cylinder 1, the discharge pipe 34 can be designed to be very short, greatly shortening the free fall distance of the solid granular pesticides or fertilizers after leaving the metering storage hole 321, and improving the application speed. This avoids the problem of some solid particles scattering outside the pit due to insufficient waiting time for operators, and greatly reduces the risk of solid particles sticking to the wall, ensuring the accuracy of the application of solid granular pesticides or fertilizers.

[0052] In this embodiment, a sensor 35 is installed on the medicine delivery device housing 31 to detect whether there is blockage in the medicine discharge pipe 34, the discharge channel 312, and the quantitative medicine storage hole 321 located in the discharge channel 312; the unblocking mechanism 4 can unblock the medicine discharge pipe 34, the discharge channel 312, and the quantitative medicine storage hole 321 located in the discharge channel 312; the controller 5 can control the unblocking mechanism 4 according to the detection result of the sensor 35, and can also control the turntable control component 33 according to the start signal of the medicine application switch 21.

[0053] Therefore, after each application, the sensor 35 detects whether there is any blockage in the quantitative storage hole 321, the discharge channel 312, and the discharge pipe 34. If a blockage is detected, it can be automatically cleared by the unblocking mechanism 4. The whole process does not require manual intervention or disassembly of the application gun, which improves the work efficiency and user experience. It can also ensure the long-term stable operation of the application gun and avoid the problem of insufficient application due to partial blockage, thereby greatly improving the control accuracy of the single application amount.

[0054] Furthermore, the rotation axis of the pesticide delivery turntable 32 coincides with the central axis of the pesticide storage cylinder 1. The pesticide delivery turntable 32 is provided with multiple quantitative pesticide storage holes 321 evenly distributed along its rotation axis. When any one quantitative pesticide storage hole 321 is located in the discharge channel 312, the remaining quantitative pesticide storage holes 321 are located in the feed trough 311. This ensures that each quantitative pesticide storage hole 321 is kept in the feed trough 311 in multiple rotation positions, thus ensuring that each quantitative pesticide storage hole 321 can be filled with solid pesticides or fertilizers in the feed trough 311.

[0055] Please see Figure 3 and Figure 4 The sensor 35 is located at the upper end of the discharge channel 312, with its detection direction facing directly downwards. The lower end of the discharge channel 312 is connected to the upper end of the discharging pipe 34. When the quantitative storage hole 321 rotates into the discharge channel 312, it is located in the middle of the channel. The sensor 35 can be a capacitive proximity switch, capable of accurately detecting whether the quantitative storage hole 321 is blocked. Since the discharge channel 312 and the discharging pipe 34 are coaxially arranged, the sensor 35 can also be a laser sensor. Laser sensors have a long detection distance, enabling them to identify blockages in the discharge channel 312, the quantitative storage hole 321, and the discharging pipe 34 from top to bottom.

[0056] Please see Figure 4 and Figure 5 The outer circumferential surface of the medicine delivery turntable 32 is formed with a ring of driven teeth 322. The turntable control component 33 includes a servo motor 331 mounted on the medicine delivery device housing 31 and a drive gear 332 synchronously mounted on the servo motor shaft of the servo motor 331. The drive gear 332 meshes with the driven teeth 322. The servo motor shaft of the servo motor 331 drives the drive gear 332 to rotate synchronously with it. The drive gear 332 drives the medicine delivery turntable 32 to rotate through the driven teeth 322. The control accuracy is high and the structure is simple and reliable.

[0057] During testing, the lower end of the discharge pipe 34 was very prone to clogging with soil, preventing the application of solid granular pesticides or fertilizers. Therefore, please refer to [the relevant documentation / reference]. Figure 5The lower end of the discharge pipe 34 is equipped with an anti-clogging sleeve 36. The anti-clogging sleeve 36 includes a mounting part 361 fitted onto the lower end of the discharge pipe 34 and a flared opening 362 integrally formed at the lower end of the mounting part 361. The flared opening 362 is a conical structure with a diameter that gradually increases from top to bottom. The open design of the flared opening 362 effectively prevents soil blockage. Based on the soil's own weight and the conical inner wall of the flared opening 362, the soil in contact with it will hardly stick to the inner wall of the flared opening 362. Even if a small amount adheres, since the diameter of the flared opening 362 is much larger than the diameter of the discharge pipe 34, it will not affect the downward discharge of the discharge pipe 34 at all. It is simple, reliable, and extremely ingenious.

[0058] In this embodiment, the mounting part 361 is a cylindrical structure. The mounting part 361 is detachably installed at the lower end of the medicine discharge pipe 34 to facilitate disassembly, cleaning and maintenance.

[0059] Please see Figure 2 The upper outer circumference of the storage cylinder 1 is provided with a dispensing port 11, so that solid granular pesticides or fertilizers can be loaded into the storage cylinder 1 without removing the handle 2, which is very convenient.

[0060] Please see Figure 2 and Figure 3 The unblocking mechanism 4 includes a gas cylinder connector 41 installed on the top of the handle 2. The gas cylinder connector 41 has a gas delivery channel 411. One end of the gas delivery channel 411 is connected to a high-pressure gas cylinder 43, and the other end is connected to an exhaust nozzle 44. An air inlet 45 is installed at the upper end of the discharge channel 312 and is connected thereto. The exhaust nozzle 44 is connected to the air inlet 45 through a gas delivery pipe 46. A plug 47 for controlling the opening and closing of the gas delivery channel 411 and a gas cut-off holding device 48 for making the plug 47 tend to block the gas delivery channel 411 are movably installed in the gas delivery channel 411. A ventilation control device 49 is installed in the handle 2 to prevent the plug 47 from blocking the gas delivery channel 411.

[0061] When the ventilation control device 49 does not act on the gas cut-off holding device 48, the gas cut-off holding device 48 keeps the gas delivery channel 411 in the open state, and the high-pressure gas in the high-pressure gas storage cylinder 43 will not be output. When the ventilation control device 49 acts on the gas cut-off holding device 48, the gas delivery channel 411 is in the open state, and the high-pressure gas in the high-pressure gas storage cylinder 43 is injected into the discharge channel 312 through the gas delivery channel 411 and the gas delivery pipe 46 in sequence, and then discharged through the metering storage hole 321 in the discharge channel 312, and finally discharged through the discharge pipe 34. The whole process uses high-pressure gas to discharge the blockages in the discharge channel 312, the discharge pipe 34 and the metering storage hole 321 in the discharge channel 312 to the outside through the discharge pipe 34. The unblocking effect is excellent, and it is simple, reliable and ingeniously designed.

[0062] Specifically, the end of the gas delivery channel 411 away from the high-pressure gas storage cylinder 43 is narrowed to form a plug guide hole 411a. The end of the plug guide hole 411a away from the high-pressure gas storage cylinder 43 is connected to the inside of the handle 2. The wall of the plug guide hole 411a is connected to the air inlet 45 through a branch gas channel 411b. A first conical surface 411c with a radius gradually decreasing towards the plug guide hole 411a is formed between the gas delivery channel 411 and the plug guide hole 411a. The plug 47 includes a plug body 471 and a sliding engagement rod 4, which are coaxially arranged. 72. The plug body 471 is a cylindrical structure with a diameter smaller than that of the gas supply channel 411. The diameter of the sliding fitting rod 472 is smaller than that of the plug body 471 and it slides with the plug guide hole 411a. The end of the plug body 471 near the sliding fitting rod 472 has a cross-section that can cooperate with the first conical surface 411c. An air seal 42 is provided between the end of the plug guide hole 411a near the handle 2 and the sliding fitting rod 472. The end of the sliding fitting rod 472 away from the plug body 471 extends outward through the plug guide hole 411a.

[0063] Correspondingly, the gas cut-off retention device 48 includes a spring support 481 fixedly installed at one end of the gas transmission channel 411 near the high-pressure gas storage cylinder 43, and a compression spring 482 elastically supported between the adjacent end faces of the spring support 481 and the plug body 471. The spring support 481 is provided with a vent hole 481a that connects the high-pressure gas storage cylinder 43 and the gas transmission channel 411.

[0064] Correspondingly, the ventilation control device 49 is an electromagnetic push rod, the outer end face of which is directly opposite the end face of the sliding mating rod 472 that protrudes from the plug guide hole 411a.

[0065] Therefore, when the push rod 491 of the electromagnetic push rod is not in contact with the sliding mating rod 472, the second conical surface 473 of the plug 47, under the action of the compression spring 482, is tightly fitted with the first conical surface 411c of the gas delivery channel 411, thereby cutting off the gas delivery channel 411 and preventing the high-pressure gas storage cylinder 43 from outputting high-pressure gas. When the push rod 491 of the electromagnetic push rod pushes the plug 47 to move closer to the high-pressure gas storage cylinder 43, a gap appears between the second conical surface 473 of the plug 47 and the first conical surface 411c of the gas delivery channel 411, thereby opening the gas delivery channel 411 and allowing the high-pressure gas storage cylinder 43 to output high-pressure gas. The specific gas output amount is determined by the holding time of the push rod 491 pushing the plug 47.

[0066] Please see Figures 6-12The controller 5 mainly includes an MCU, a power supply module, a material feeding execution module, a material feeding detection module, and a dredging control module. The power supply module is used to supply power to the MCU. The material feeding execution module is used to send the signal from the application switch 21 to the MCU and control the turntable control component 33 according to the control command issued by the MCU. The material feeding detection module is used to control the sensor 35 according to the control command issued by the MCU and then send the signal returned by the sensor 35 to the MCU. The dredging control module is used to control the dredging mechanism 4 according to the control command issued by the MCU.

[0067] Specifically, please see 7 and Figure 8 The power module includes a first-stage buck circuit and a second-stage buck circuit connected in sequence. The input terminal of the first-stage buck circuit receives the input power, and the input power voltage is 12V, that is, the output voltage of the battery is 12V. The voltage at the output terminal of the first-stage buck circuit and the input terminal of the second-stage buck circuit is both 5V. The output terminal of the second-stage buck circuit outputs the working voltage to the MCU, and the working voltage is 3.3V.

[0068] Please participate Figure 7 The first-stage buck circuit includes a first buck chip U3. The input terminal of the first buck chip U3 is connected to a 12V input power supply, and a capacitor C3 is connected in series with this input terminal before grounding. The output terminal of the first buck chip U3 is connected in series with an induction coil L1 to output a 5V voltage. A capacitor C16 is connected in series with the rear end of the induction coil L1 before grounding. This rear end is also connected to the feedback pin of the first buck chip U3. The output terminal of the first buck chip U3 is connected to the cathode of a switching diode D2, and the anode of the switching diode D2 is grounded. The ground terminal of the first buck chip U3 is grounded. The enable control pin and the EP pin of the first buck chip U3 are both grounded. The first-stage buck circuit can stably convert a 12V DC voltage to a 5V DC voltage.

[0069] Please participate Figure 8 The second-stage buck circuit includes a second buck chip U1. The input terminal of the second buck chip U1 is connected to the rear end of the induction coil L1. This input terminal is connected in series with a capacitor C4 and then grounded. Both output terminals of the second buck chip U1 output a 3.3V operating voltage. One of the output terminals is connected in series with a capacitor C5 and then grounded. The ground terminal of the second buck chip U1 is also grounded. This second-stage buck circuit can stably convert a 5V DC voltage to a 3.3V DC voltage.

[0070] Please participate Figure 9 and Figure 10 The material feeding execution module includes a switching circuit and a turntable drive circuit.

[0071] Please participate Figure 9The switching circuit has a terminal P1 for the application switch 21 and a terminal P2 for the MCU. Pin 1 of terminal P1 is connected to the input power supply, pins 2 and 3 of terminal P1 are grounded, pin 4 of terminal P1 is connected to pin 2 of terminal P2, the common terminal of pin 5 of terminal P1 and pin 1 of terminal P2 is grounded, and pin 6 of terminal P1 is connected to the OUT terminal of application switch 21. The start signal sent by application switch 21 is sent to the MCU through this switching circuit.

[0072] Please participate Figure 10 The turntable drive circuit includes a terminal H2 connected to the turntable control component 33 (servo motor 331). Pin 1 of terminal H2 is connected to the output of the second-stage step-down circuit, and a capacitor C14 is connected in series with pin 1 before grounding. Pin 2 of terminal H2 is connected to the PWM_DJ terminal of the MCU, and pin 3 of terminal H2 is grounded. The MCU issues control commands, which are sent to the turntable control component 33 (servo motor 331) via this turntable drive circuit.

[0073] Please participate Figure 11 The material dropping detection module has a terminal block H3 connected to sensor 35. Pin 1 of terminal block H3 is connected to the input power supply, and a capacitor C15 is connected in series with pin 1 before grounding. Pin 2 of terminal block H3 is connected in series with resistor R20 before connecting to the input power supply, and pin 2 is also connected to the LL_CHK terminal of the MCU. Pin 3 of terminal block H3 is grounded. The MCU sends control commands to sensor 35 via the material dropping detection module, and the information collected by sensor 35 is sent to the MCU via the material dropping detection module.

[0074] Please participate Figure 12The unblocking control module is equipped with a terminal P3 for connecting the unblocking mechanism 4 (electromagnetic push rod). Pin 2 of terminal P3 is grounded, and pin 1 of terminal P3 is connected to the normally open terminal of relay RLY1. The common terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit. The voltage input terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit. The control terminal of relay RLY1 is connected to the collector of NPN transistor Q1. The voltage input terminal of relay RLY1 is connected to the cathode of switching diode D1. The anode of switching diode D1 is connected to the collector of NPN transistor Q1. The emitter of NPN transistor Q1 is grounded. The base of NPN transistor Q1 is connected to the DC_CTRL terminal of MCU after series resistor R19. The base is also connected to ground after series resistor R18. When a clearing task is required, the MCU's DC_CTRL terminal sends a high level to the base of the NPN transistor Q1, connecting the collector and emitter of Q1. This energizes the coil of relay RLY1, connecting the voltage input terminal of relay RLY1 to its normally closed terminal, thus powering the electromagnetic push rod. The push rod 491 of the electromagnetic push rod then pushes the sliding engagement rod 472. When a clearing task is not required, the MCU's DC_CTRL terminal sends a low level to the base of the NPN transistor Q1, disconnecting the collector and emitter of Q1. This de-energizes the coil of relay RLY1, connecting the voltage input terminal of relay RLY1 to its normally open terminal, de-energizing the electromagnetic push rod. The push rod 491 of the electromagnetic push rod will not push the sliding engagement rod 472.

[0075] Please see Figure 13 The controller 5 also includes a wireless communication module, which is equipped with a communication chip U2. The reset pin RST of the communication chip U2 is connected to the output of the power module via a series resistor R10. The reset pin RST is also connected to one end of a shorting point U4, the other end of which is grounded. The enable pin EN of the communication chip U2 is connected to the output of the power module via a series resistor R5. The power input VCC of the communication chip U2 is connected to the output of the power module. The ground terminal GND of the communication chip U2 is grounded. The GPIO15 pin of the communication chip U2 is grounded via a series resistor R12. The transmitting pin TXD0 and the receiving pin RXD0 of the communication chip U2 are connected to the UART2RX and UART2TX pins of the MCU, respectively. The GPIO0 pin of the communication chip U2 is connected to the output of the power module via a series resistor R13. The GPIO0 pin is also connected to a switch SW4 via a series resistor and then grounded. By setting up the wireless communication module, remote wireless data interaction between the device and external systems can be supported.

[0076] Please see Figure 14The controller 5 also includes a USB communication module, which is equipped with a USB communication chip USB1. Both VBUS pins of the USB communication chip USB1 are connected to the input power supply. Both ground terminals of the USB communication chip USB1 are grounded. These two ground terminals are connected in series with resistor R16 and then to pin CC1 of the USB communication chip USB1. Both ground terminals are also connected in series with resistor R17 and then to pin CC2 of the USB communication chip USB1. Both SHELL pins of the USB communication chip USB1 are grounded. By setting up the USB communication module, the device can support USB-based data interaction with external systems.

[0077] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A smart anti-clogging handheld quantitative spray gun for solid particles, comprising a hollow cylindrical storage cylinder, a handle and a rotary dispensing device respectively installed at the upper and lower ends of the storage cylinder, wherein the handle is provided with a dispensing switch, characterized in that, The rotary metering dispenser includes a dispenser housing fixedly installed at the lower end of the storage cylinder, a dispensing turntable rotatably installed in the dispenser housing, a turntable control assembly for driving the dispensing turntable to rotate, and a dispensing pipe installed at the lower part of the dispensing turntable. The dispensing turntable has at least one metering storage hole. The dispenser housing has a feed trough communicating with the lower end of the storage cylinder and a discharge channel communicating with the upper end of the dispensing pipe. The turntable control assembly enables each metering storage hole to first complete the storage in the feed trough and then move to the discharge channel one by one to discharge the material into the discharge pipe. The dispenser housing is equipped with a sensor for detecting whether there is blockage in the dispensing pipe, the discharge channel, and the metering storage hole located in the discharge channel. It also includes a dredging mechanism and a controller. The dredging mechanism can dredge the discharge pipe, the discharge channel and the quantitative storage hole in the discharge channel. The controller can control the dredging mechanism according to the detection results of the sensor and control the turntable control component according to the start signal of the application switch. The unblocking mechanism includes a gas cylinder connector installed on the top of the handle. The gas cylinder connector has a gas delivery channel. One end of the gas delivery channel is connected to a high-pressure gas cylinder, and the other end is connected to an exhaust nozzle. An air inlet is installed at the upper end of the discharge channel and is connected to it. The exhaust nozzle is connected to the air inlet through a gas delivery pipe. A plug for controlling the opening and closing of the gas delivery channel and a gas cut-off holding device for making the plug tend to block the gas delivery channel are movably installed in the gas delivery channel. A ventilation control device is installed in the handle to prevent the plug from blocking the gas delivery channel. The gas delivery channel has a narrowed diameter at the end away from the high-pressure gas storage cylinder, forming a plug guide hole. This plug guide hole communicates with the interior of the handle at the end away from the high-pressure gas storage cylinder. The wall of the plug guide hole is connected to the air inlet via a branch gas passage. A first conical surface with a radius gradually decreasing towards the plug guide hole is formed between the gas delivery channel and the plug guide hole. The plug includes a plug body and a sliding fitting rod arranged coaxially. The plug body is a cylindrical structure with a diameter smaller than that of the gas delivery channel. The diameter of the sliding fitting rod is smaller than that of the plug body and slides with the plug guide hole. The cross-section of the plug body near the sliding fitting rod is a second conical surface that can cooperate with the first conical surface. An air seal is provided between the end of the plug guide hole near the handle and the sliding fitting rod. The end of the sliding fitting rod away from the plug body extends outward through the plug guide hole. The gas cut-off retention device includes a spring support seat fixedly installed at one end of the gas transmission channel near the high-pressure gas storage cylinder and a compression spring elastically supported between the adjacent end faces of the spring support seat and the plug body. The spring support seat has a vent hole that connects the high-pressure gas storage cylinder and the gas transmission channel. The ventilation control device is an electromagnetic push rod, and the outer end face of the push rod is directly opposite the end face of the sliding fitting rod that passes through the guide hole of the plug.

2. The intelligent anti-clogging handheld quantitative spraying gun for solid particles according to claim 1, characterized in that, The rotation axis of the drug delivery turntable coincides with the central axis of the drug storage cylinder, and the drug delivery turntable is provided with a plurality of quantitative drug storage holes evenly distributed along its rotation axis. When any one of the metering storage holes is located in the discharge channel, the remaining metering storage holes are located in the feed trough.

3. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 2, characterized in that, A ring of driven teeth is formed on the outer circumferential surface of the medicine delivery turntable. The turntable control assembly includes a servo motor mounted on the medicine delivery device housing and a drive gear synchronously mounted on the servo motor shaft. The drive gear meshes with the driven teeth.

4. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 1, characterized in that, The lower end of the discharge pipe is equipped with an anti-clogging sleeve, which includes a mounting part fitted onto the lower end of the discharge pipe and a flared opening integrally formed at the lower end of the mounting part. The flared opening is a conical structure with a diameter that gradually increases from top to bottom.

5. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 1, characterized in that, The controller includes: MCU; The power module is used to supply power to the MCU; The material feeding execution module is used to send the signal from the application switch to the MCU, and control the turntable control component according to the control instructions issued by the MCU; The material feeding detection module is used to control the sensor according to the control instructions issued by the MCU, and then send the signal returned by the sensor to the MCU. The unblocking control module is used to control the unblocking mechanism according to the control commands issued by the MCU.

6. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 5, characterized in that, The power module includes a first-stage buck circuit and a second-stage buck circuit connected in sequence. The input terminal of the first-stage buck circuit receives the input power, and the output terminal of the second-stage buck circuit outputs the operating voltage to the MCU. The material feeding execution module includes a switching circuit and a turntable drive circuit. The switching circuit is provided with a terminal P1 for connecting to the application switch and a terminal P2 for connecting to the MCU. Pin 1 of terminal P1 is connected to the input power supply, pins 2 and 3 of terminal P1 are grounded, pin 4 of terminal P1 is connected to pin 2 of terminal P2, the common terminal of pin 5 of terminal P1 and pin 1 of terminal P2 is grounded, and pin 6 of terminal P1 is connected to the OUT terminal of the application switch. The turntable drive circuit includes a terminal H2 for connecting to the turntable control component. Pin 1 of terminal H2 is connected to the output terminal of the second-stage step-down circuit, and a capacitor C14 is connected in series with pin 1 before grounding. Pin 2 of terminal H2 is connected to the PWM_DJ terminal of the MCU, and pin 3 of terminal H2 is grounded. The material feeding detection module is provided with a terminal H3 for connecting to a sensor. Pin 1 of terminal H3 is connected to the input power supply. Pin 1 is also connected to ground after being connected in series with capacitor C15. Pin 2 of terminal H3 is connected to the input power supply after being connected in series with resistor R20. Pin 2 is also connected to the LL_CHK terminal of the MCU. Pin 3 of terminal H3 is grounded. The unblocking control module is equipped with a terminal P3 for connecting the unblocking mechanism. Pin 2 of terminal P3 is grounded, and pin 1 of terminal P3 is connected to the normally open terminal of relay RLY1. The common terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit, and the voltage input terminal of relay RLY1 is connected to the output terminal of the first-stage step-down circuit. The control terminal of relay RLY1 is connected to the collector of NPN transistor Q1, and the voltage input terminal of relay RLY1 is connected to the cathode of switching diode D1. The anode of switching diode D1 is connected to the collector of NPN transistor Q1, and the emitter of NPN transistor Q1 is grounded. The base of NPN transistor Q1 is connected to the DC_CTRL terminal of the MCU after series resistor R19, and the base is also connected to the ground after series resistor R18.

7. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 6, characterized in that, The controller also includes a wireless communication module, which is equipped with a communication chip U2. The reset pin RST of the communication chip U2 is connected to the output terminal of the power module after being connected in series with a resistor R10. The reset pin RST is also connected to one end of a shorting point U4, and the other end of the shorting point U4 is grounded. The enable pin EN of the communication chip U2 is connected to the output terminal of the power module after being connected in series with a resistor R5. The power input terminal VCC of the communication chip U2 is connected to the output terminal of the power module. The ground terminal GND of the communication chip U2 is grounded. The GPIO15 pin of the communication chip U2 is connected to the ground after being connected in series with a resistor R12. The transmitting terminal TXD0 and the receiving terminal RXD0 of the communication chip U2 are connected to the UART2RX terminal and the UART2TX terminal of the MCU, respectively. The GPIO0 pin of the communication chip U2 is connected to the output terminal of the power module after being connected in series with a resistor R13. The GPIO0 pin is also connected in series with a switch SW4 and then grounded.

8. The intelligent anti-clogging handheld quantitative sprayer for solid particles according to claim 6, characterized in that, The controller also includes a USB communication module, which is equipped with a USB communication chip USB1. Both VBUS pins of the USB communication chip USB1 are connected to the input power supply. Both grounding terminals of the USB communication chip USB1 are grounded. The two grounding terminals are connected in series with a resistor R16 and then connected to the CC1 pin of the USB communication chip USB1. The two grounding terminals are also connected in series with a resistor R17 and then connected to the CC2 pin of the USB communication chip USB1. Both SHELL pins of the USB communication chip USB1 are grounded.

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