Fuel powered needleless continuous injection method

Abstract

The application discloses a fuel-powered needleless continuous injection device and method, which comprises a needleless injection gun and a combustion hydraulic cavity separated from the needleless injection gun; wherein the needleless injection gun comprises a hollow columnar gun body, the gun body is internally provided with a plunger, and the gun body is divided into a medicament cavity and a liquid inlet cavity by the plunger; in addition, the combustion hydraulic cavity is also a hollow columnar structure, the hollow columnar structure is internally provided with a piston, and the combustion hydraulic cavity is divided into a liquid outlet cavity and a combustion chamber by the piston; the fuel-powered needleless continuous injection device comprises a control unit, the liquid inlet cavity and the medicament cavity are both provided with pressure detection units, the pressure detection units in the liquid inlet cavity and the medicament cavity are both connected to the control unit, and the control unit is also connected to liquid fuel and gas delivery devices of the combustion hydraulic cavity. The injection device and method can adaptively adjust the injection pressure according to the pressure detection results in the liquid inlet cavity and the medicament cavity.

Description

[0001] This case is a divisional application of the following parent application: Application No. 2023100823949, Application Date February 8, 2023, Invention Title "A fuel-powered needleless continuous injection device and method". Technical Field

[0002] This invention relates to animal medical auxiliary equipment, and in particular to a fuel-powered needleless continuous injection device and method. Background Technology

[0003] In traditional animal husbandry, immunization and treatment are performed using syringes with needles. With the development of large-scale farming and batch production, the number of animals in herds has increased, requiring the simultaneous injection of vaccines and medications into a large number of individuals during immunization, treatment, and reproductive control. However, in practice, it is difficult to change needles for every animal, easily leading to the spread of diseases. Furthermore, stress and lack of cooperation from animals during injections often result in medication spillage and needle breakage, affecting the effectiveness of the injection.

[0004] Needle-free injection, also known as jet injection or pulse injection, involves administering medication without a needle. Liquid drugs are delivered directly to the body's tissues via an ultra-fine, high-speed, straight, high-pressure jet. This results in more diffuse drug distribution within the tissues, facilitating absorption and solving numerous problems associated with traditional injection methods, such as cross-infection, low efficiency, and needle breakage. Current veterinary needle-free injectors use high-pressure gas as their power source, requiring ultra-high-pressure gas cylinders to generate sufficient injection pressure, making the device inconvenient to use.

[0005] In particular, the required injection pressure varies for different types and ages of livestock. Existing needleless injection devices are difficult to apply to various types and sizes of livestock, and it is difficult to accurately inject pressure and dosage. They are also prone to causing stress reactions in livestock, resulting in poor universality and low injection efficiency. Summary of the Invention

[0006] To address the technical problems of existing needleless injection devices, such as their difficulty in being applicable to various types and sizes of livestock, and the difficulty in accurately determining injection pressure and dosage, resulting in poor versatility and low injection efficiency, this invention proposes a fuel-powered needleless continuous injection device and method. This device and method can adapt to differences in animal species and provide different levels of fuel power, ensuring sufficient injection while avoiding stress reactions in livestock.

[0007] To achieve this goal, the present invention adopts the following technical solution.

[0008] A fuel-powered needleless continuous injection device includes a needleless injection gun and a combustion hydraulic chamber separate from the needleless injection gun. The needleless injection gun includes a hollow cylindrical body with a plunger reciprocating between a pre-injection position and an injection position. The plunger divides the body into a drug chamber and a liquid inlet chamber. The combustion hydraulic chamber is also a hollow cylindrical structure containing a piston reciprocating between a pre-push position and a push position. The piston divides the chamber into a liquid outlet chamber and a combustion chamber. The device includes a control unit, and both the liquid inlet chamber and the drug chamber contain pressure detection units connected to the control unit. The control unit is also connected to a liquid fuel and gas delivery device within the combustion hydraulic chamber.

[0009] Specifically, the gun body is divided into a propellant chamber and a liquid inlet chamber by a plunger. The liquid inlet chamber has a liquid inlet at the rear, which is connected to a liquid inlet pipe. The propellant chamber has an injection port at the front end. The injection position of the plunger is closer to the injection port than the injection position. The combustion hydraulic chamber is a hollow cylindrical structure, which includes a piston that can reciprocate between the push-to-push position and the push-to-push position. The combustion hydraulic chamber is divided into a liquid outlet chamber and a combustion chamber by the piston. When the piston is in the push-to-push position, the plunger is in the injection position. When the piston is in the push-to-push position, the plunger is in the injection position.

[0010] In this invention, the instantaneous high pressure generated by the combustion of a liquid fuel mixed with air or oxygen propels the plunger forward. This high pressure is adjustable depending on the composition, concentration, and quantity of the liquid fuel and air or oxygen. When the liquid fuel and air or oxygen are uniformly mixed in the combustion chamber, an electric spark is generated by an ignition device, causing intense combustion of the liquid fuel and air or oxygen in the combustion chamber. This instantaneous high pressure is sufficient to push the agent into the animal's body. The liquid fuel and air or oxygen form a mist-like gaseous mixture in the combustion chamber through the fuel delivery pipe and the nozzle at the tip of the intake pipe, facilitating combustion. Therefore, this invention has the advantages of high thrust and flexible operation.

[0011] In particular, the advantage of this invention lies in the inclusion of pressure detection units in both the inlet chamber and the medication chamber. The medication chamber is positioned against the animal's body surface via the injection port. Therefore, during injection, if the medication can be injected into the animal's body surface, the pressure within the medication chamber is actually equal to the animal's body surface tolerance pressure; conversely, if injection fails, the pressure within the medication chamber is equal to the pressure in the inlet chamber. Thus, by providing pressure detection units in both the inlet chamber and the medication chamber, this invention can detect whether injection is possible and the actual required injection pressure.

[0012] For example, during injection, if the pressure in the inlet chamber is significantly greater than the pressure in the drug chamber, such that the pressure difference exceeds a first threshold, it indicates that the pressure generated by burning the liquid fuel is greater than the required injection pressure, which can easily cause stress in livestock. In this case, it is necessary to reduce the pressure to achieve balance. Conversely, if the pressure in the inlet chamber is not significantly greater than the pressure in the drug chamber, or even if they are equal, it indicates that the pressure generated by burning the liquid fuel is insufficient to smoothly propel the drug into the livestock's body. In this case, it is necessary to increase the amount of liquid fuel to generate secondary ignition and secondary combustion in the combustion chamber, increasing the pressure in the inlet chamber and the outlet chamber of the combustion fluid chamber inside the gun body, so as to smoothly propel the drug into the livestock's body. Therefore, this invention has the characteristic of adapting to livestock species and individual differences, ensuring smooth drug delivery to the livestock's body while avoiding stress reactions caused by excessive pressure.

[0013] In the fuel-powered needleless continuous injection device of the present invention, the lower end of the needleless injection gun body has an operating handle and a trigger, and the combustion chamber has an ignition device. The trigger and the ignition device are connected to the control unit. When the operator pulls the trigger, the control unit controls the start of the liquid fuel and gas delivery device to deliver liquid fuel and air or oxygen to the combustion chamber, and controls the ignition device in the combustion chamber to ignite the mixture of liquid fuel and air or oxygen.

[0014] In the fuel-powered needleless continuous injection device of the present invention, the operating handle has a cavity, which houses the control unit and the battery. The battery provides power to the control unit and the pressure detection units in the liquid inlet chamber and the drug chamber.

[0015] In the fuel-powered needleless continuous injection device of the present invention, the liquid fuel and gas delivery device of the combustion hydraulic chamber includes a fuel delivery pipe and an air inlet pipe connected to the rear end of the combustion chamber of the combustion hydraulic chamber, and a fuel bottle connected to the fuel delivery pipe, wherein the air inlet pipe provides air or oxygen to the combustion chamber, and the liquid fuel and gas delivery device also includes a fuel delivery pump and an air or oxygen delivery pump disposed in the fuel delivery pipe and the air inlet pipe.

[0016] In the fuel-powered needleless continuous injection device of the present invention, an electromagnetic coil is provided at the position corresponding to the piston to be pushed forward outside the combustion hydraulic chamber. The power supply unit of the electromagnetic coil is connected to the control unit. The piston is made of ferromagnetic material. When the operator releases the trigger, the control unit controls the electromagnetic coil to be energized, pulling the piston back to the position to be pushed forward. Correspondingly, the plunger retracts to the position to be injected.

[0017] Specifically, this invention also utilizes an electromagnetic coil and external power supply to pull the piston back from the advance position to the ready-to-advance position. To ensure sufficient pulling force, the external power supply unit can include a supercapacitor capable of providing a strong magnetic field of 0.1–0.2T to the electromagnetic coil, rapidly pulling the ferromagnetic piston back to the ready-to-advance position. The piston's retraction creates negative pressure in both the inlet chamber and the outlet chamber of the combustion hydraulic chamber inside the gun body, pulling the plunger back to the injection position. Due to the one-way valve at the injection port, the medication in the vial is drawn back into the medication chamber for the next injection. This completes the automatic medication filling function of the medication chamber.

[0018] In the fuel-powered needleless continuous injection device of the present invention, the combustion chamber of the combustion hydraulic chamber has an external unloading hole at the rear end. The unloading hole is covered by an unloading valve, which is connected to a control unit. When the control unit detects that the trigger is released, or when the control unit issues a control command based on the pressure difference between the pressure detection unit in the liquid inlet chamber and the agent chamber, the unloading valve opens, and the high pressure of combustion in the combustion chamber is unloaded.

[0019] In the fuel-powered needleless continuous injection device of the present invention, the front end of the drug chamber of the needleless injection gun is a hollow conical structure, and the front end of the plunger is a conical shape that matches the inner surface of the hollow conical structure. The fuel-powered needleless continuous injection device also includes a drug bottle fixed to the needleless injection gun body. The drug bottle is a hollow cylindrical structure filled with drug, with an air inlet at the rear end, a movable plug in the middle, and a drug outlet at the front end. The space between the movable plug and the front end of the drug bottle is filled with liquid drug. The outer conical surface of the drug chamber of the needleless injection gun has a drug inlet, which is connected to the drug outlet at the front end of the drug bottle through a drug delivery pipe. A one-way valve is provided at the drug inlet for one-way delivery of drug from the drug bottle to the drug chamber of the needleless injection gun.

[0020] In the fuel-powered needleless continuous injection device of the present invention, the inner side of the front end of the drug chamber of the needleless injection gun has a contact switch. The contact switch is connected to the control unit and is used to send an injection completion signal to the control unit when the front end of the plunger contacts the contact switch.

[0021] In addition, the present invention also includes a needleless continuous fuel injection method, the method comprising the steps of:

[0022] A. Based on the operator's signal to press the trigger, the control unit activates the liquid fuel and gas delivery device in the combustion hydraulic chamber to deliver liquid fuel and air or oxygen to the combustion chamber;

[0023] B. The control unit controls the ignition device in the combustion chamber to ignite the mixture of liquid fuel and air or oxygen, and detects the pressure in the liquid inlet chamber and the agent chamber through the pressure detection unit in the liquid inlet chamber and the agent chamber;

[0024] C. The control unit controls the liquid fuel and gas delivery device to replenish the combustion chamber with liquid fuel and air or oxygen based on the pressure difference between the liquid inlet chamber and the agent chamber, and controls the ignition device to perform secondary ignition; or controls the unloading valve to partially unload the high pressure of combustion in the combustion chamber;

[0025] D. When the control unit receives the injection completion signal or the operator releases the trigger signal, it opens the solenoid valve to pull the piston back to the push position and controls the unloading valve to completely unload the combustion high pressure in the combustion chamber.

[0026] In the fuel-powered needleless continuous injection method of the present invention, the control unit controls the liquid fuel and gas delivery device to replenish the combustion chamber with liquid fuel and air or oxygen based on the pressure difference between the liquid inlet chamber and the agent chamber, and controls the ignition device to perform secondary ignition; or controls the unloading valve to partially unload the high combustion pressure in the combustion chamber, including:

[0027] When the pressure difference between the liquid inlet chamber and the agent chamber is greater than the first threshold, the control unloading valve partially unloads the high combustion pressure in the combustion chamber.

[0028] When the pressure difference between the liquid inlet chamber and the agent chamber is less than the second threshold, the liquid fuel and gas delivery device is controlled to replenish the combustion chamber with liquid fuel and air or oxygen, and the ignition device is controlled to ignite for a second time, increasing the pressure in the liquid inlet chamber. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston is in the position to be pushed forward, the plunger is in the position to be injected.

[0030] Figure 2 This is a partial structural diagram of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston is in the pushing position, the plunger is in the injection position.

[0031] Figure 3 This is a partial structural diagram of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston returns to the position to be pushed, the plunger returns to the position to be injected.

[0032] Figure 4 This is a schematic diagram of a continuous fuel-powered needleless injection process according to a specific embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in detail with reference to the accompanying drawings.

[0034] The following detailed exemplary embodiments are disclosed. However, the specific structural and functional details disclosed herein are merely for the purpose of describing exemplary embodiments.

[0035] However, it should be understood that the present invention is not limited to the specific exemplary embodiments disclosed, but covers all modifications, equivalents, and substitutions falling within the scope of the present invention. Throughout the description of the drawings, the same reference numerals denote the same elements.

[0036] Referring to the accompanying drawings, the structures, proportions, sizes, etc., depicted in the drawings are merely for illustrative purposes to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the conditions under which the invention can be implemented and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the positional limitations used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0037] It should also be understood that the term “and / or” as used herein includes any and all combinations of one or more of the related listed items. Furthermore, it should be understood that when a component or unit is referred to as “connected” or “coupled” to another component or unit, it may be directly connected or coupled to the other component or unit, or there may be intermediate components or units. In addition, other words used to describe the relationship between components or units should be understood in the same manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.).

[0038] Figure 1 This is a schematic diagram of the overall structure of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston is in the position to be pushed forward, the plunger is in the position to be injected. Figure 2 This is a partial structural diagram of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston is in the pushing position, the plunger is in the injection position. Figure 3 This is a partial structural diagram of a fuel-powered needleless continuous injection device according to a specific embodiment of the present invention, wherein when the piston returns to the position to be pushed, the plunger returns to the position to be injected.

[0039] The following combination Figures 1-3This invention describes the working principle of a fuel-powered needleless continuous injection device according to a specific embodiment. The device includes a needleless injection gun 10 and a combustion hydraulic chamber 20 separate from the injection gun. The needleless injection gun 10 includes a hollow cylindrical gun body 110. Inside the gun body 110, there is a plunger 103 that can reciprocate between the injection position and the injection position. The gun body 110 is divided into a drug chamber 102 and a liquid inlet chamber 105 by the plunger 103. The liquid inlet chamber 105 has a liquid inlet 106 at its rear, which is connected to... The inlet pipe 109 and the front end of the agent chamber 102 have an injection port 101. The injection position of the plunger 103 is closer to the injection port 101 than the position to be injected. The combustion hydraulic chamber 20 is a hollow cylindrical structure 210. The hollow cylindrical structure 210 includes a piston 202 that can reciprocate between the position to be pushed and the position to be pushed. The combustion hydraulic chamber 20 is divided into an outlet chamber 201 and a combustion chamber 203 by the piston 202. When the piston 202 is in the position to be pushed, the plunger 103 is in the position to be injected. When the piston 202 is in the position to be pushed, the plunger 103 is in the position to be injected.

[0040] Specifically, the fuel-powered needleless continuous injection device includes a control unit 116, and pressure detection units are included in both the liquid inlet chamber 105 and the drug chamber 102. Figure 1 112 is the pressure detection unit in the liquid inlet chamber 105; the pressure detection units in the liquid inlet chamber 105 and the agent chamber 102 are both connected to the control unit 116, and the control unit 116 is also connected to the liquid fuel and gas delivery device of the combustion hydraulic chamber 20.

[0041] Specifically, in this embodiment of the invention, the needleless injection gun 10 is separated from the combustion hydraulic chamber 20 and connected to it via an inlet pipe 109. When the piston 202 of the combustion hydraulic chamber 20 is in the ready-to-advance position, the plunger 103 of the needleless injection gun 10 is in the ready-to-inject position; and when the piston 202 of the combustion hydraulic chamber 20 is in the advance position, the plunger 103 of the needleless injection gun 10 is in the injection position. This configuration avoids the high temperature generated by the combustion of liquid fuel in the combustion hydraulic chamber 20 from affecting the needleless injection gun 10 itself, thus protecting the operator and maintaining a constant temperature for the needleless injection gun 10, facilitating continuous operation.

[0042] In addition, the fuel-powered needleless continuous injection device of the present invention further includes a control unit. The combustion chamber 203 of the combustion hydraulic chamber 20 has an ignition device. The rear end of the combustion chamber 203 of the combustion hydraulic chamber 20 has a fuel delivery pipe 205 and an air inlet pipe 206. The fuel delivery pipe 205 is connected to a fuel bottle (not shown in the figure) storing liquid fuel. The air inlet pipe 206 is used to provide air or oxygen to the combustion chamber 203. The fuel delivery pipe 205 and the air inlet pipe 206 respectively have a fuel delivery pump and an air or oxygen delivery pump. The starting units of the fuel delivery pump and the air or oxygen delivery pump, as well as the ignition device of the combustion hydraulic chamber 20, are connected to the control unit. The control unit controls the starting of the fuel delivery pump and the air or oxygen delivery pump to deliver liquid fuel and air or oxygen into the combustion chamber 203 of the combustion hydraulic chamber 20, and controls the ignition device to ignite the liquid fuel.

[0043] Liquid fuels include liquefied petroleum gas (LPG) and gasoline. For gasoline, fuel injectors can be added for atomization, while air is usually sufficient.

[0044] In a specific embodiment of the present invention, the instantaneous high pressure generated when liquid fuel is mixed and burned with air or oxygen pushes piston 202 forward. This high pressure is adjustable according to the composition, concentration, and amount of liquid fuel and air or oxygen. When the liquid fuel and air or oxygen are uniformly mixed in the combustion chamber 203, an electric spark is generated by an ignition device, causing the liquid fuel and air or oxygen to burn violently in the combustion chamber 203. This instantaneous combustion can generate a large pressure, sufficient to push piston 202 to the advance position, and correspondingly push piston 103 to the injection position (e.g., Figure 2 As shown, the agent is injected into the animal's body. Liquid fuel and air or oxygen are mixed in a mist-like gaseous mixture within the combustion chamber 203 through the nozzles at the tips of the fuel delivery pipe 205 and the air intake pipe 206, facilitating combustion. Therefore, this invention has the advantages of high thrust and flexible operation.

[0045] In particular, the advantage of this invention lies in the inclusion of pressure detection units in both the inlet chamber 105 and the medication chamber 102. The medication chamber 102 is positioned against the animal's body surface via the injection port 111. Therefore, during injection, if the medication can be injected into the animal's body surface, the pressure within the medication chamber 102 is actually equal to the animal's body surface tolerance pressure; conversely, if the medication cannot be injected, the pressure within the medication chamber 102 is equal to the pressure in the inlet chamber 105. Thus, by providing pressure detection units in both the inlet chamber 105 and the medication chamber 102, this invention can detect whether injection is possible and the actual required injection pressure, and make adjustments accordingly.

[0046] For example, during injection, if the pressure in the inlet chamber 105 is significantly greater than the pressure in the drug chamber 102, such that the pressure difference exceeds a first threshold, it indicates that the pressure generated by burning the liquid fuel is greater than the actual pressure required for the injected drug. This can easily cause stress in livestock. Therefore, it is necessary to reduce the pressure and balance it by releasing some of the pressure. Conversely, if the pressure in the inlet chamber 105 is not significantly greater than the pressure in the drug chamber 102, or even the same, it indicates that the pressure generated by burning the liquid fuel is insufficient to smoothly push the drug into the livestock's body. In this case, it is necessary to increase the amount of liquid fuel and air or oxygen to generate secondary ignition and secondary combustion in the combustion chamber 203, increasing the pressure in the inlet chamber 105 and the outlet chamber 201 of the combustion hydraulic chamber inside the gun body 10, so as to smoothly push the drug into the livestock's body. All of this is done by detecting pressure differences in real time without human intervention. Therefore, this invention is adaptive to livestock species and individual differences, and can avoid the inaccuracy of manually setting pressure. Thus, it can ensure that the medicine is successfully delivered into the livestock, avoid stress reactions caused by excessive pressure, and avoid the problem of wasting medicine due to second injections when the injection is unsuccessful.

[0047] In practical applications, the amount of liquid fuel and air or oxygen input to the liquid fuel and gas delivery device of the combustion hydraulic chamber 20 can be preset in advance to preset the combustion pressure. For example, a higher pressure value can be manually set first, and then the combustion high pressure in the combustion chamber can be reduced by partial unloading during the injection process, which will correspondingly reduce the injection pressure and ensure the success rate of the injection.

[0048] In the fuel-powered needleless continuous injection device of the present invention, the lower end of the needleless injection gun 10 has an operating handle 107 and a trigger 108, and the combustion chamber 203 has an ignition device. The trigger 108 and the ignition device are connected to the control unit 116. When the operator pulls the trigger 108, the control unit 116 controls the start of the fuel delivery pump and the air or oxygen delivery pump to deliver liquid fuel and air or oxygen into the combustion chamber 203 of the combustion hydraulic chamber 20, and controls the ignition device to ignite the mixture of liquid fuel and air or oxygen.

[0049] In the fuel-powered needleless continuous injection device of this invention, the operating handle 107 has a cavity that houses the control unit 116 and the battery 1071. The battery 1071 provides power to the control unit 116 and the pressure detection units in the liquid inlet chamber 105 and the drug chamber 102. Therefore, this invention is convenient to use.

[0050] As shown in the figure, in the fuel-powered needleless continuous injection device of the present invention, the liquid fuel and gas delivery device of the combustion hydraulic chamber includes a fuel delivery pipe and an air inlet pipe connected to the rear end of the combustion chamber 203 of the combustion hydraulic chamber 20, and a fuel bottle connected to the fuel delivery pipe. The air inlet pipe provides air or oxygen to the combustion chamber 203. The liquid fuel and gas delivery device also includes a fuel delivery pump and an air or oxygen delivery pump installed in the fuel delivery pipe and the air inlet pipe.

[0051] In the fuel-powered needleless continuous injection device of the present invention, an electromagnetic coil 207 is located on the outside of the combustion hydraulic chamber corresponding to the piston's advance position. The power supply unit 2071 of the electromagnetic coil 207 is connected to the control unit 116. The piston 202 is made of ferromagnetic material. When the operator releases the trigger 108, the control unit 116 controls the electromagnetic coil 207 to be energized, pulling the piston 202 back to the advance position. Correspondingly, the plunger 103 retracts to the injection position.

[0052] Specifically, in this embodiment of the invention, an electromagnetic coil and an external power supply are used to pull the piston from the advance position back to the ready-to-advance position. To ensure sufficient pulling force, the external power supply unit 2071 may include a supercapacitor, capable of providing a strong magnetic field of 0.1 to 0.2T to the electromagnetic coil, rapidly pulling the ferromagnetic piston 202 back to the ready-to-advance position. The retraction of the piston 202 to the ready-to-advance position generates negative pressure in both the liquid inlet chamber 105 and the liquid outlet chamber 201 of the combustion hydraulic chamber 20 inside the gun body, pulling the plunger 103 back to the ready-to-injection position. Due to the one-way valve at the injection port 101, the negative pressure causes gas to enter from the air inlet 305 at the rear end of the medicine bottle 30 behind the movable plug 302, drawing the medicine from the medicine bottle 30 back into the medicine chamber 102 for the next injection. Therefore, this invention can achieve the automatic filling function of the medicine chamber 102.

[0053] In the fuel-powered needleless continuous injection device of the present invention, the combustion chamber 203 of the combustion hydraulic chamber 20 has an external unloading hole 208 at its rear end. The unloading hole 208 is covered by an unloading valve 209. The unloading valve 209 is connected to the control unit 116 and is used to open the unloading valve 209 when the control unit 116 detects that the trigger 108 is released, or when the control unit 116 issues a control command based on the pressure difference between the pressure detection unit in the liquid inlet chamber 105 and the agent chamber 102, so that the high pressure of combustion in the combustion chamber 203 is unloaded.

[0054] In the fuel-powered needleless continuous injection device of the present invention, the front end of the drug chamber 102 of the needleless injection gun 10 is a hollow conical structure, and the front end of the plunger 103 is a conical shape that matches the inner surface of the hollow conical structure. This allows all the drug in the drug chamber 102 to be injected into the animal body, avoiding drug residue. The fuel-powered needleless continuous injection device also includes a medicine bottle 30 fixed to the body of the needleless injection gun 10. The medicine bottle 30 is a hollow cylindrical structure filled with medicine, with an air inlet 305 at the rear end, a movable plug 302 in the middle, and a medicine outlet at the front end. The space 303 between the movable plug and the front end of the medicine bottle is filled with liquid medicine. The outer conical surface of the medicine chamber 102 of the needleless injection gun 10 has a medicine inlet 111, which is connected to the medicine outlet at the front end of the medicine bottle 30 through a medicine delivery pipe 301. A one-way valve is provided in the medicine inlet for one-way delivery of medicine from the medicine bottle 30 to the medicine chamber 102 of the needleless injection gun 10, so as to prevent medicine from returning to the medicine bottle 30 and causing contamination.

[0055] In the fuel-powered needleless continuous injection device of the present invention, the inner side of the front end of the drug chamber of the needleless injection gun has a contact switch. The contact switch is connected to the control unit and is used to send an injection completion signal to the control unit when the front end of the plunger contacts the contact switch.

[0056] In addition, such as Figure 4 As shown, related to the fuel-powered needleless continuous injection device of the present invention, the present invention also includes a fuel-powered needleless continuous injection method, which includes the following steps:

[0057] A. Based on the signal from the operator pressing the trigger 108, the control unit 116 activates the liquid fuel and gas delivery device of the combustion hydraulic chamber 20 to deliver a mixture of liquid fuel and air or oxygen to the combustion chamber 203;

[0058] B. The control unit 116 controls the ignition device in the combustion chamber 203 to ignite the mixture of liquid fuel and air or oxygen, and detects the pressure in the liquid inlet chamber 105 and the agent chamber 102 through the pressure detection unit in the liquid inlet chamber 105 and the agent chamber 102.

[0059] C. The control unit 116 controls the liquid fuel and gas delivery device to replenish the combustion chamber 203 with liquid fuel and air or oxygen based on the pressure difference detected in the liquid inlet chamber 105 and the agent chamber 102, and controls the ignition device to ignite the combustion chamber 203 for secondary ignition; or controls the unloading valve 209 to partially unload the combustion high pressure in the combustion chamber 203.

[0060] D. When the control unit 116 receives the injection completion signal or the operator releases the trigger 108, it opens the solenoid valve 207 to pull the piston 202 back to the push position and controls the unloading valve 209 to completely unload the combustion high pressure in the combustion chamber 203.

[0061] The control unloading valve 209 partially unloads the high pressure of combustion in the combustion chamber 203. In particular, the opening time of the unloading valve 209 can be adjusted to a shorter time. This ensures that the remaining pressure is still sufficient to inject the medicine into the animal's body, and also avoids excessive pressure drop that could cause negative pressure.

[0062] In the fuel-powered needleless continuous injection method of this invention, the control unit 116 controls the liquid fuel and gas delivery device to replenish the combustion chamber 203 with liquid fuel and air or oxygen based on the pressure difference between the liquid inlet chamber 105 and the agent chamber 102, and controls the ignition device to perform secondary ignition; or controls the unloading valve 209 to partially unload the high combustion pressure in the combustion chamber 203, including:

[0063] When the pressure difference between the liquid inlet chamber 105 and the agent chamber 102 is greater than the first threshold, the unloading valve 209 partially unloads the high pressure of combustion in the combustion chamber 203.

[0064] When the pressure difference between the liquid inlet chamber 105 and the agent chamber 102 is less than the second threshold, the liquid fuel and gas delivery device is controlled to replenish the combustion chamber 203 with liquid fuel and air or oxygen, and the ignition device is controlled to ignite for a second time, thereby increasing the pressure in the liquid inlet chamber 105.

[0065] More specifically, the present invention may also have an improved technical solution, which gradually increases the pressure in the liquid inlet chamber 105 or gradually unloads the combustion high pressure in the combustion chamber 203 by performing secondary ignition multiple times or unloading the high pressure multiple times through a pre-set step value, so as to achieve the technical effect of stable operation and reduced stress response.

[0066] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as mentioned above, it should be understood that the present invention is not limited to the forms disclosed in this specification and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described in this specification through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A non-disease treatment method of fuel-powered needleless continuous injection for the reproductive production regulation of animals in livestock farming, characterized in that, The method comprises the steps of: A. According to the signal of the operator pressing the trigger, the control unit starts the liquid fuel and gas delivery device of the combustion hydraulic chamber to deliver liquid fuel and air or oxygen to the combustion chamber; B. The control unit controls the ignition device in the combustion chamber to ignite the mixture of liquid fuel and air or oxygen, and detects the pressure in the liquid inlet chamber and the medicament chamber through the pressure detection units in the liquid inlet chamber and the medicament chamber; C. According to the pressure difference between the liquid inlet chamber and the medicament chamber, the control unit controls the liquid fuel and gas delivery device to supplement liquid fuel and air or oxygen to the combustion chamber, and controls the ignition device to ignite again; or controls the unloading valve to partially unload the high-pressure combustion in the combustion chamber; D. When the control unit receives the injection completion signal or the signal of the operator releasing the trigger, the electromagnetic valve is opened to pull the piston back to the pre-injection position, and the unloading valve is controlled to fully unload the high-pressure combustion in the combustion chamber. The method applies a fuel-powered needleless continuous injection device, which comprises a needleless injection gun and a combustion hydraulic chamber separated from the needleless injection gun.

2. The method of claim 1, wherein, According to the pressure difference between the liquid inlet chamber and the medicament chamber, the control unit controls the liquid fuel and gas delivery device to supplement liquid fuel and air or oxygen to the combustion chamber, and controls the ignition device to ignite again; or controls the unloading valve to partially unload the high-pressure combustion in the combustion chamber, which comprises: When the pressure difference between the liquid inlet chamber and the medicament chamber is greater than a first threshold value, the unloading valve is controlled to partially unload the high-pressure combustion in the combustion chamber; When the pressure difference between the liquid inlet chamber and the medicament chamber is less than a second threshold value, the liquid fuel and gas delivery device is controlled to supplement liquid fuel and air or oxygen to the combustion chamber, and the ignition device is controlled to ignite again to increase the pressure in the liquid inlet chamber.

3. The method of claim 1, wherein, The fuel-powered needleless continuous injection device, wherein the needleless injection gun comprises a hollow cylindrical gun body, the inside of the gun body has a plunger reciprocable between a pre-injection position and an injection position, and the inside of the gun body is divided into a medicament chamber and a liquid inlet chamber by the plunger; the combustion hydraulic chamber is also a hollow cylinder, which comprises a piston reciprocable between a pre-injection position and an injection position, and the inside of the combustion hydraulic chamber is divided into a liquid outlet chamber and a combustion chamber by the piston; the fuel-powered needleless continuous injection device comprises a control unit, the liquid inlet chamber and the medicament chamber each comprise a pressure detection unit, the pressure detection units in the liquid inlet chamber and the medicament chamber are connected to the control unit, and the control unit is also connected to the liquid fuel and gas delivery device of the combustion hydraulic chamber.

4. The method of claim 3, wherein, The lower end of the gun body of the needleless injection gun has an operating handle and a trigger, and the combustion chamber has an ignition device; the trigger and the ignition device are connected to the control unit, so that when the operator pulls the trigger, the control unit controls the liquid fuel and gas delivery device to deliver liquid fuel and air or oxygen to the combustion chamber, and controls the ignition device in the combustion chamber to ignite the mixture of liquid fuel and air or oxygen.

5. The method as claimed in claim 3, wherein, The operating handle has a cavity, and the cavity contains the control unit and a battery; the battery provides power for the control unit and the pressure detection units in the liquid inlet chamber and the medicament chamber.

6. The method of claim 3, wherein, The liquid fuel and gas delivery device of the combustion hydraulic chamber comprises a fuel delivery pipe and an air inlet pipe connected to the rear end of the combustion chamber of the combustion hydraulic chamber, and a fuel bottle connected to the fuel delivery pipe, wherein the air inlet pipe provides air or oxygen for the combustion chamber, and the liquid fuel and gas delivery device further comprises a fuel delivery pump and an air or oxygen delivery pump arranged in the fuel delivery pipe and the air inlet pipe.

7. The method of claim 4, wherein, The position of the combustion hydraulic chamber corresponding to the position of the piston to be pushed has an electromagnetic coil, and the power supply unit of the electromagnetic coil is connected to the control unit, and the piston is made of ferromagnetic material; when the operator releases the trigger, the control unit controls the electromagnetic coil to be powered on, and the piston is pulled back to the position to be pushed; accordingly, the plunger is retracted to the position to be injected.

8. The method of claim 4, wherein, The rear end of the combustion chamber of the combustion hydraulic chamber has an external unloading hole, which is covered by an unloading valve connected to the control unit, for when the control unit detects that the trigger is released, or according to the control instruction issued by the control unit according to the pressure difference of the pressure detection unit in the liquid inlet chamber and the medicine chamber, the unloading valve is opened, and the high pressure in the combustion chamber is unloaded.

9. The method as claimed in claim 4, wherein, The front end of the medicine chamber of the needle-free injection gun is a hollow conical structure, and the front end of the plunger is conical in shape and matches the inner surface of the hollow conical structure, and the fuel-powered needle-free continuous injection device further comprises a medicine bottle fixed to the body of the needle-free injection gun, which is a hollow cylindrical structure filled with medicine, has an air inlet hole at the rear end, an movable plug in the middle, and a medicine outlet at the front end; the space between the movable plug and the front end of the medicine bottle is filled with liquid medicine; The conical outer surface of the medicine chamber of the needle-free injection gun has a medicine inlet, which is connected to the medicine outlet at the front end of the medicine bottle through a medicine delivery pipe; a one-way valve is provided at the medicine inlet for one-way delivery of medicine from the medicine bottle to the medicine chamber of the needle-free injection gun.

10. The method of claim 9, wherein, The front end of the medicine chamber of the needle-free injection gun has a contact switch inside, which is connected to the control unit, for sending an injection completion signal to the control unit when the front end of the plunger contacts the contact switch.

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