CN115804890B - Fuel-powered needleless continuous injection device and method - Google Patents
Fuel-powered needleless continuous injection device and method Download PDFInfo
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- CN115804890B CN115804890B CN202310082394.9A CN202310082394A CN115804890B CN 115804890 B CN115804890 B CN 115804890B CN 202310082394 A CN202310082394 A CN 202310082394A CN 115804890 B CN115804890 B CN 115804890B
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- 238000002347 injection Methods 0.000 title claims abstract description 143
- 239000007924 injection Substances 0.000 title claims abstract description 143
- 238000000034 method Methods 0.000 title abstract description 14
- 239000003814 drug Substances 0.000 claims abstract description 138
- 238000002485 combustion reaction Methods 0.000 claims abstract description 122
- 239000007788 liquid Substances 0.000 claims abstract description 119
- 239000000446 fuel Substances 0.000 claims abstract description 100
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 40
- 239000001301 oxygen Substances 0.000 claims description 38
- 229910052760 oxygen Inorganic materials 0.000 claims description 38
- 239000003570 air Substances 0.000 claims description 25
- 239000007789 gas Substances 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 9
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000004913 activation Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 16
- 244000144972 livestock Species 0.000 description 20
- 241001465754 Metazoa Species 0.000 description 12
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000013589 supplement Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 238000002649 immunization Methods 0.000 description 2
- 230000003053 immunization Effects 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
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- 230000003938 response to stress Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61D—VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS
- A61D7/00—Devices or methods for introducing solid, liquid, or gaseous remedies or other materials into or onto the bodies of animals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
- A61M5/2046—Media being expelled from injector by gas generation, e.g. explosive charge
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/70—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in livestock or poultry
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a fuel power needleless continuous injection device and a method, comprising a needleless injection gun and a combustion hydraulic cavity separated from the needleless injection gun; the needle-free injection gun comprises a gun body with a hollow columnar structure, wherein a plunger is arranged in the gun body, and the interior of the gun body is divided into a medicament cavity and a liquid inlet cavity by the plunger; in addition, the combustion hydraulic cavity is of a hollow columnar structure, the hollow columnar structure comprises a piston, the inside of the combustion hydraulic cavity is divided into a liquid outlet cavity and a combustion chamber by the piston, the fuel power needle-free continuous injection device comprises a control unit, the liquid inlet cavity and the medicament cavity comprise pressure detection units, the pressure detection units in the liquid inlet cavity and the medicament cavity are connected to the control unit, and the control unit is further connected to a liquid fuel and gas conveying device of the combustion hydraulic cavity. The injection device and the method can adaptively adjust the injection pressure according to the pressure detection results in the liquid inlet cavity and the medicament cavity.
Description
Technical Field
The invention relates to animal medical auxiliary equipment, in particular to a fuel power needleless continuous injection device and a method.
Background
In the traditional farming mode, immunization and treatment of animals are accomplished by means of syringes with needles. Along with the development of large-scale cultivation and batch production, the quantity of cultivation groups is increased, and a large number of animal individuals are required to be injected with vaccines and medicines simultaneously in the processes of immunization, treatment and reproduction production regulation and control. However, in practical production, it is difficult to replace the needle for each animal, and epidemic disease is easily spread. Meanwhile, when in injection, due to the fact that animal stress is not matched, problems such as drug overflow and needle breakage occur frequently, and injection effect is affected.
The needleless injection is also called jet injection and pulse injection, and is characterized by that when the medicine injection is implemented, it does not use needle, and the liquid medicine can be directly fed into the body tissue in the mode of ultrafine, high-speed and straight-line jet injection, so that the medicine distribution in the tissue can be more dispersed, and is favorable for medicine absorption, at the same time the invented injection also can solve the several problems of cross-infection, low efficiency and broken needle, etc.. The existing needleless injector for animals uses high-pressure air as a power source, and in order to generate enough injection pressure, an extra-high pressure air bottle is needed, so that the device is very inconvenient to use.
In particular, for different kinds of livestock and different ages of months, the pressure required to complete injection is different, the needleless injection device in the prior art is difficult to be suitable for various types of livestock and different sizes, and is difficult to accurately inject pressure and medicament injection quantity, and meanwhile, stress reaction of the livestock is easy to be caused, so that the universality is poor, and the injection efficiency is low.
Disclosure of Invention
In order to solve the technical problems that the needleless injection device in the prior art is difficult to be suitable for livestock of various types and different sizes, and is difficult to accurately inject pressure and medicament injection quantity, so that universality is poor, injection efficiency is low and the like, the invention provides a fuel power needleless continuous injection device and a fuel power needleless continuous injection method.
In order to achieve the object, the invention adopts the following technical scheme.
A fuel power needleless continuous injection device comprises a needleless injection gun and a combustion hydraulic cavity separated from the needleless injection gun; the needle-free injection gun comprises a gun body with a hollow columnar structure, wherein a plunger capable of reciprocating between a position to be injected and an injection position is arranged in the gun body, and the interior of the gun body is divided into a medicament cavity and a liquid inlet cavity by the plunger; in addition, the combustion hydraulic cavity is of a hollow columnar structure, the hollow columnar structure comprises a piston capable of reciprocating between a to-be-propelled position and a propelled position, the combustion hydraulic cavity is divided into a liquid outlet cavity and a combustion chamber by the piston, the fuel power needleless continuous injection device comprises a control unit, the liquid inlet cavity and the medicament cavity comprise pressure detection units, the pressure detection units in the liquid inlet cavity and the medicament cavity are connected to the control unit, and the control unit is further connected to a liquid fuel and gas conveying device of the combustion hydraulic cavity.
Specifically, the gun body is divided into a medicament cavity and a liquid inlet cavity by a plunger, the liquid inlet is arranged at the rear part of the liquid inlet cavity and communicated with a liquid inlet pipe, the front end of the medicament cavity is provided with an injection port, and the injection position of the plunger is closer to the injection port than the position to be injected; the combustion hydraulic cavity is of a hollow columnar structure, the hollow columnar structure comprises a piston capable of reciprocating between a position to be propelled and a propelling position, and the combustion hydraulic cavity is divided into a liquid outlet cavity and a combustion chamber by the piston; when the piston is at the position to be pushed, the plunger is at the position to be injected; when the piston is in the advanced position, the plunger is in the injection position.
In the invention, the instantaneous high pressure generated when liquid fuel and air or oxygen are mixed and combusted is adopted to push the plunger to move forwards, the high pressure is adjustable along with the components, the concentration and the dosage of the liquid fuel and the air or oxygen, when the liquid fuel and the air or the oxygen are uniformly mixed in the combustion chamber, the ignition device is used for generating electric sparks, so that the liquid fuel and the air or the oxygen are vigorously combusted in the combustion chamber, and the instantaneous high pressure can be generated, so that the medicament is pushed into the animal body. The liquid fuel and air or oxygen form vaporous mixture in the combustion chamber through the nozzles at the tips of the fuel delivery pipe and the air inlet pipe, so that the combustion is convenient. Therefore, the invention has the advantages of large thrust and flexible operation.
In particular, the present invention has the advantage that a pressure detection unit is included in both the feed liquid chamber and the medicament chamber, which medicament chamber is in abutment against the body surface of the animal via the injection port, so that, during injection, if the medicament can be injected into the body surface of the animal, the pressure in the medicament chamber is practically equal to the withstand pressure of the body surface of the animal; and if no injection is possible, the pressure in the medicament chamber is equal to the pressure in the inlet chamber. Therefore, the pressure detection units respectively arranged in the liquid inlet cavity and the medicament cavity can detect whether injection can be carried out in the injection process and the pressure actually needed to be injected.
For example, during injection, when the pressure in the liquid inlet cavity is significantly greater than the pressure in the medicament cavity, so that the pressure difference is greater than the first threshold, it is indicated that the pressure generated by burning the liquid fuel is greater than the injection required pressure, and stress reaction is easily caused to livestock, at this time, partial pressure needs to be relieved to balance the pressure, and when the pressure in the liquid inlet cavity is not significantly greater than the pressure in the medicament cavity, or even the two pressures are the same, it is indicated that the pressure generated by burning the liquid fuel is insufficient to smoothly push the medicament into the livestock, at this time, by adding the liquid fuel, secondary ignition and secondary combustion are generated in the combustion chamber, so that the pressure of the liquid inlet cavity in the gun body and the liquid outlet cavity of the combustion hydraulic cavity is increased, and the medicament is smoothly pushed into the livestock. Therefore, the invention has the characteristics of self-adaption to the species and individual differences of livestock, can ensure that the medicament can be smoothly pushed into the livestock, and can also avoid the stress response of the livestock caused by overlarge pressure.
In the fuel power needleless continuous injection device, the lower end of a gun body of the needleless injection gun is provided with an operating handle and a trigger, an ignition device is arranged in a combustion chamber, the trigger and the ignition device are connected to a control unit, and when an operator pulls the trigger, the control unit controls to start a liquid fuel and gas conveying device to convey liquid fuel and air or oxygen for the combustion chamber, and controls the ignition device in the combustion chamber to ignite a mixture of the liquid fuel and the air or the oxygen.
In the fuel power needleless continuous injection device, the operating handle is provided with a cavity, the cavity is internally provided with the control unit and the battery, and the battery provides power for the control unit, the liquid inlet cavity and the pressure detection unit in the medicament cavity.
In the fuel-powered needleless continuous injection device of the present invention, the liquid fuel and gas delivery device of the combustion hydraulic chamber comprises a fuel delivery pipe and an air intake 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 intake pipe supplies air or oxygen to 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 intake pipe.
In the fuel power needleless continuous injection device, an electromagnetic coil is arranged at a position, corresponding to the position to be propelled, of a piston outside a combustion hydraulic cavity, a power supply unit of the electromagnetic coil is connected to a control unit, and the piston is made of ferromagnetic materials; when the operator releases the trigger, the control unit controls the electromagnetic coil to be electrified, and the piston is pulled back to the position to be propelled; accordingly, the plunger is retracted to the position to be injected.
In particular, in the invention, an electromagnetic coil and an external power supply mode are also used for pulling the piston back to the position to be pushed from the pushing position, in order to ensure enough pulling force, the external power supply unit can comprise a super capacitor, can provide a strong magnetic field of 0.1-0.2T for the electromagnetic coil, rapidly pull the ferromagnetic piston back to the position to be pushed, and generate negative pressure in both a liquid inlet cavity inside the gun body and a liquid outlet cavity of the combustion hydraulic cavity through the retraction of the piston to the position to be pushed, and pull the plunger back to the position to be injected, so that the medicament in the medicament bottle is pulled back to the medicament cavity due to the existence of the check valve at the injection port, thereby facilitating the next injection. Thus completing the automatic filling of the medicament chamber.
In the fuel power needleless continuous injection device, the rear end of the combustion chamber of the combustion hydraulic cavity is provided with an external unloading hole, the unloading hole is covered by the unloading valve, and the unloading valve is connected to the control unit and is used for opening the unloading valve and unloading combustion high pressure in the combustion chamber when the control unit detects that the trigger is released or according to a control instruction sent by the control unit according to the pressure difference value of the pressure detection unit in the liquid inlet cavity and the medicament cavity.
In the fuel power needleless continuous injection device, the front end of a medicament cavity of the needleless injection gun is of a hollow conical structure, the front end of a plunger is of a conical shape matched with the inner surface of the hollow conical structure, the fuel power needleless continuous injection device also comprises a medicament bottle fixed to a gun body of the needleless injection gun, the medicament bottle is of a hollow columnar structure filled with medicament, the rear end of the medicament bottle is provided with an air inlet hole, the middle part of the medicament bottle is provided with a movable plug, and the front end of the medicament bottle is provided with a medicament outlet; the space between the movable plug and the front end of the medicament bottle is filled with liquid medicament; the conical outer surface of the needle-free injection gun medicament cavity is provided with a medicament inlet which is connected to a medicament outlet at the front end of the medicament bottle through a medicament delivery pipe; a one-way valve is provided at the medicament inlet for one-way delivery of medicament from the medicament vial to the medicament chamber of the needle-less injection gun.
In the fuel-powered needleless continuous injection device of the present invention, a contact switch is provided inside the front end of the medicament chamber of the needleless injection gun, and the contact switch 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.
In addition, the invention also comprises a fuel power needleless continuous injection method, which comprises the following steps:
A. according to the signal of pressing the trigger by an operator, the control unit starts a liquid fuel and gas conveying device of the combustion hydraulic cavity to convey liquid fuel and air or oxygen to the combustion chamber;
B. the control unit controls an ignition device in the combustion chamber to ignite a mixture of liquid fuel and air or oxygen, and detects the pressure in the liquid inlet cavity and the medicament cavity through a pressure detection unit in the liquid inlet cavity and the medicament cavity;
C. the control unit controls the liquid fuel and gas conveying device to supplement liquid fuel and air or oxygen for the combustion chamber according to the pressure difference value between the liquid inlet cavity and the medicament cavity, and controls the ignition device to perform secondary ignition; or controlling the unloading valve part to unload the combustion high pressure in the combustion chamber;
D. when the control unit receives an injection completion signal or a trigger loosening signal of an operator, the electromagnetic valve is opened to pull the piston back to a position to be pushed, and the unloading valve is controlled to completely unload the combustion high pressure in the combustion chamber.
In the continuous injection method of the fuel power needleless head, a control unit controls a liquid fuel and gas conveying device to supplement liquid fuel and air or oxygen for a combustion chamber according to the pressure difference value between a liquid inlet cavity and a medicament cavity, and controls an ignition device to perform secondary ignition; or controlling the unloading valve portion to unload the combustion high pressure in the combustion chamber includes:
when the pressure difference between the liquid inlet cavity and the medicament cavity is larger than a first threshold value, controlling the unloading valve part to unload the combustion high pressure in the combustion chamber;
when the pressure difference between the liquid inlet cavity and the medicament cavity is smaller than a second threshold value, controlling the liquid fuel and gas conveying device to supplement liquid fuel and air or oxygen for the combustion chamber, controlling the ignition device to perform secondary ignition, and increasing the pressure in the liquid inlet cavity.
Drawings
Fig. 1 is a schematic view of the overall structure of a fuel-powered needleless continuous injection device in accordance with an embodiment of the present invention, in which the plunger is in a position to be injected when the piston is in the position to be advanced.
Fig. 2 is a schematic view of a portion of a fuel-powered needleless continuous injection device in accordance with an embodiment of the present invention, wherein the plunger is in an injection position when the piston is in a advanced position.
Fig. 3 is a schematic view of a portion of a fuel-powered needleless continuous injection device in which the plunger returns to the to-be-injected position when the piston returns to the to-be-advanced position, in accordance with an embodiment of the present invention.
Fig. 4 is a schematic flow chart of a fuel powered needleless continuous injection in accordance with an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.
It should be understood, however, that the invention is not limited to the particular exemplary embodiments disclosed, but is to cover all modifications, equivalents, and alternatives falling within the scope of the invention. Like reference numerals refer to like elements throughout the description of the drawings.
Referring to the drawings, the structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, proportional changes, or adjustments of sizes may be made without affecting the efficacy of the invention or achieving the purpose, and are therefore within the scope of the disclosure. In addition, the positional limitation terms recited in the present specification are used merely for convenience of description, and are not intended to limit the scope of the invention, in which the relative changes or modifications are regarded as the scope of the invention without any substantial modification to the technical content.
It should also be understood that the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. It will also be understood that when a component or element is referred to as being "connected" or "coupled" to another component or element, it can be directly connected or coupled to the other component or element or intervening components or elements may also be present. Moreover, other words used to describe the relationship between components or units should be interpreted in the same manner (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.).
Fig. 1 is a schematic view of the overall structure of a fuel-powered needleless continuous injection device in accordance with an embodiment of the present invention, in which the plunger is in a position to be injected when the piston is in the position to be advanced. Fig. 2 is a schematic view of a portion of a fuel-powered needleless continuous injection device in accordance with an embodiment of the present invention, wherein the plunger is in an injection position when the piston is in a advanced position. Fig. 3 is a schematic view of a portion of a fuel-powered needleless continuous injection device in which the plunger returns to the to-be-injected position when the piston returns to the to-be-advanced position, in accordance with an embodiment of the present invention.
The following describes the working principle of a fuel-powered needleless continuous injection device in the embodiment of the present invention with reference to fig. 1 to 3, wherein the fuel-powered needleless continuous injection device comprises a needleless injection gun 10 and a combustion hydraulic chamber 20 separated from the needleless injection gun; the needle-free injection gun 10 comprises a gun body 110 with a hollow columnar structure, wherein a plunger 103 capable of reciprocating between a position to be injected and an injection position is arranged in the gun body 110, the gun body 110 is divided into a medicament cavity 102 and a liquid inlet cavity 105 by the plunger 103, the rear part of the liquid inlet cavity 105 is provided with a liquid inlet 106, the liquid inlet 106 is communicated with a liquid inlet pipe 109, the front end of the medicament cavity 102 is provided with an injection port 101, and 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 columnar structure 210, the hollow columnar structure 210 comprises a piston 202 capable of reciprocating between a position to be propelled and a propelling position, and the combustion hydraulic chamber 20 is divided into a liquid outlet chamber 201 and a combustion chamber 203 by the piston 202; when the piston 202 is in the position to be advanced, the plunger 103 is in the position to be injected; when the piston 202 is in the advanced position, the plunger 103 is in the injection position.
In particular, the fuel-powered needleless continuous injection device comprises a control unit 116, a pressure detection unit is included in each of the liquid inlet cavity 105 and the medicament cavity 102, and 112 in fig. 1 is the pressure detection unit in the liquid inlet cavity 105; the pressure sensing units in both the inlet chamber 105 and the medicament chamber 102 are connected to a control unit 116, the control unit 116 being further connected to liquid fuel and gas delivery means of the combustion chamber 20.
Specifically, in the embodiment of the invention, the needleless injection gun 10 is separated from the combustion hydraulic cavity 20 and is connected with the combustion hydraulic cavity 20 through the liquid inlet pipe 109, and when the piston 202 of the combustion hydraulic cavity 20 is at the position to be pushed, the plunger 103 of the needleless injection gun 10 is at the position to be injected; and when the piston 202 of the combustion chamber 20 is in the advanced position, the plunger 103 of the needleless injection gun 10 is in the injection position. By the arrangement mode, the needle-free injection gun 10 can be prevented from being influenced by high temperature generated by burning liquid fuel in the hydraulic cavity 20, operators can be protected, the temperature of the needle-free injection gun 10 can be kept constant, and continuous operation is facilitated.
In addition, the fuel-powered needleless continuous injection device of the embodiment of the invention further comprises a control unit, wherein an ignition device is arranged in the combustion chamber 203 of the combustion hydraulic chamber 20, a fuel delivery pipe 205 and an air inlet pipe 206 are arranged at the rear end of the combustion chamber 203 of the combustion hydraulic chamber 20, the fuel delivery pipe 205 is connected to a fuel bottle (not shown in the figure) for storing liquid fuel, and the air inlet pipe 206 is used for providing air or oxygen for the combustion chamber 203; the fuel delivery pipe 205 and the intake pipe 206 have a fuel delivery pump and an air or oxygen delivery pump, respectively, a start unit of the fuel delivery pump and the air or oxygen delivery pump, and an ignition device of the combustion hydraulic chamber 20 are connected to a control unit, and the control unit 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 liquid fuel.
The liquid fuel comprises liquefied gas, gasoline, and the like, and can be atomized by adding an oil nozzle, and is usually air.
In the embodiment of the present invention, the piston 202 is pushed forward by the instantaneous high pressure generated when the liquid fuel and air or oxygen are mixed and combusted, the high pressure is adjustable according to the composition, concentration and amount of the liquid fuel and air or oxygen, when the liquid fuel and air or oxygen are uniformly mixed in the combustion chamber 203, the ignition device generates electric spark to cause the intense combustion of the liquid fuel and air or oxygen in the combustion chamber 203, and the instantaneous high pressure can be generated, so that the piston 202 is pushed to the pushing position, the piston 103 is correspondingly pushed to the injecting position (as shown in fig. 2), and the medicament is pushed into the animal body. Liquid fuel and air or oxygen form a vaporous mixture in the combustion chamber 203 through nozzles at the tips of the fuel delivery tube 205 and the air intake tube 206 for convenient combustion. Therefore, the invention has the advantages of large thrust and flexible operation.
In particular, the present invention has an advantage in that a pressure detection unit is included in both the liquid inlet chamber 105 and the medicament chamber 102, the medicament chamber 102 being abutted against the body surface of the livestock through the injection port 111, so that, when the medicament can be injected into the body surface of the livestock during injection, the pressure inside the medicament chamber 102 is practically equal to the tolerance pressure of the body surface of the livestock; and if no medicament can be injected into it, the pressure in the medicament chamber 102 will be equal to the pressure in the inlet chamber 105. Therefore, the pressure detection units respectively arranged in the liquid inlet cavity 105 and the medicament cavity 102 can detect whether injection can be carried out in the injection process and the pressure actually needed to be injected, and can be adjusted accordingly.
For example, during injection, when the pressure in the fluid inlet chamber 105 is significantly greater than the pressure in the medicament chamber 102, such that the pressure difference is greater than the first threshold, it means that the pressure generated by burning the liquid fuel is greater than the pressure actually required for injecting the medicament, which is easy to cause stress reaction to livestock, so that it is necessary to reduce the pressure by removing part of the pressure to balance. When the pressure in the liquid inlet 105 is not significantly greater than the pressure in the medicine chamber 102, or even the same, the pressure generated by burning the liquid fuel is insufficient to push the medicine into the livestock body, and then the liquid fuel and air or oxygen are added to generate secondary ignition and secondary combustion in the combustion chamber 203, so that the pressure in the liquid inlet 105 in the gun body 10 and the liquid outlet 201 in the combustion hydraulic chamber are increased, so that the medicine can be pushed into the livestock body smoothly. All the above steps are performed under the condition of detecting the pressure difference in real time without manual intervention, so that the invention has the characteristics of self-adaption of livestock types and individual differences, and can avoid inaccuracy of manual pressure setting, thereby ensuring that the medicament is smoothly pushed into livestock bodies, avoiding stress reaction of the livestock caused by overlarge pressure, and avoiding the problem of medicament waste caused by secondary injection due to unsuccessful injection.
In practical application, the amounts of liquid fuel and air or oxygen input into the liquid fuel and air delivery device of the combustion hydraulic chamber 20 can also 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 is reduced in the injection process by means of partial unloading, so that the injection pressure is correspondingly reduced, and the success rate of injection is ensured.
In the fuel-powered needleless continuous injection device of the present invention, the needle-less injection gun 10 has an operating handle 107 and a trigger 108 at the lower end of the gun body, an ignition device in the combustion chamber 203, the trigger 108 and the ignition device being connected to a control unit 116, for the control unit 116 to control the start of a fuel delivery pump and an 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 to control the ignition device to ignite a mixture of the liquid fuel and air or oxygen when the operator pulls the trigger 108.
In the fuel-powered needleless continuous injection device of the present embodiment, the operating handle 107 has a cavity therein, in which the control unit 116 and the battery 1071 are housed, and the battery 1071 provides power to the control unit 116 and the pressure detection unit in the liquid inlet chamber 105 and the medicine chamber 102. Therefore, the invention has the characteristic of convenient use.
As shown in the drawing, in the fuel-powered needleless continuous injection device of the embodiment of the present invention, the liquid fuel and gas delivery means of the combustion hydraulic chamber includes a fuel delivery pipe and an intake 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, wherein the intake pipe supplies air or oxygen to the combustion chamber 203, and the liquid fuel and gas delivery means further includes a fuel delivery pump and an air or oxygen delivery pump provided in the fuel delivery pipe and the intake pipe.
In the fuel-powered needleless continuous injection device of the embodiment of the invention, an electromagnetic coil 207 is arranged at a position outside the combustion hydraulic cavity corresponding to the position to be propelled by the piston, a power supply unit 2071 of the electromagnetic coil 207 is connected to the control unit 116, and the piston 202 is made of ferromagnetic material; for controlling the solenoid 207 to be energized by the control unit 116 to pull the piston 202 back to the position to be advanced when the operator releases the trigger 108; accordingly, the plunger 103 is retracted to the position to be injected.
In particular, in the embodiment of the present invention, the electromagnetic coil and the external power supply manner are further used to pull the piston back from the pushing position to the to-be-pushed position, in order to ensure enough pulling force, the external power supply unit 2071 may include a super capacitor, and can provide a strong magnetic field of 0.1-0.2 t for the electromagnetic coil, quickly pull the ferromagnetic piston 202 back to the to-be-pushed position, and generate negative pressure in the liquid inlet 105 inside the gun body and the liquid outlet 201 of the combustion hydraulic chamber 20 through the retraction of the piston 202 to the to-be-pushed position, pull the plunger 103 back to the to-be-injected position, and due to the check valve at the injection port 101, the negative pressure causes gas to enter the rear of the movable plug 302 from the air inlet 305 at the rear end of the medicine bottle 30, and the medicine in the medicine bottle 30 is pumped back to the medicine cavity 102 for the next injection. The present invention is thus able to perform the function of automatically filling the medicament chamber 102 with medicament.
In the fuel-powered needleless continuous injection device of the embodiment of the present invention, the rear end of the combustion chamber 203 of the combustion hydraulic chamber 20 is provided with an external unloading hole 208, the unloading hole 208 is covered by an unloading valve 209, and the unloading valve 209 is connected to the control unit 116 for opening the unloading valve 209 when the control unit 116 detects that the trigger 108 is released or when a control command is issued according to a pressure difference of the pressure detecting unit in the liquid inlet chamber 105 and the medicine chamber 102 by the control unit 116, and the combustion high pressure in the combustion chamber 203 is unloaded.
In the fuel-powered needleless continuous injection device of the embodiment of the invention, the front end of the medicament cavity 102 of the needleless injection gun 10 is of a hollow conical structure, and the front end of the plunger 103 is of a conical shape matched with the inner surface of the hollow conical structure, so that medicaments in the medicament cavity 102 can be completely input into an animal body, and medicament residues are avoided. The fuel-powered needleless continuous injection device further comprises a medicament bottle 30 fixed to the body of the needleless injection gun 10, wherein the medicament bottle 30 is of a hollow columnar structure filled with medicament, the rear end is provided with an air inlet hole 305, the middle part is provided with a movable plug 302, and the front end is provided with a medicament outlet; the space 303 between the movable plug and the front end of the medicament bottle is filled with liquid medicament; the needle-free injection gun 10 has a medicine inlet 111 on the conical outer surface of the medicine chamber 102, and the medicine inlet 111 is connected to a medicine outlet at the front end of the medicine bottle 30 through a medicine delivery tube 301; a one-way valve is provided in the medicament inlet for one-way delivery of medicament from the medicament vial 30 to the medicament chamber 102 of the needleless injection gun 10 to prevent contamination of the medicament from returning into the medicament vial 30.
In the fuel-powered needleless continuous injection device of the embodiment of the invention, a contact switch is arranged on the inner side of the front end of the medicament cavity of the needleless injection gun, and the contact switch is connected with a control unit and used for sending an injection completion signal to the control unit when the front end of the plunger contacts the contact switch.
In addition, as shown in fig. 4, in connection with the fuel-powered needleless continuous injection device of the present embodiment, the present embodiment further includes a fuel-powered needleless continuous injection method, which includes the steps of:
A. in response to an operator pressing the trigger 108, the control unit 116 opens the liquid fuel and gas delivery means of the combustion hydraulic chamber 20 to deliver a mixture of liquid fuel and air or oxygen to the combustion chamber 203;
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 pressures in the liquid inlet chamber 105 and the medicine chamber 102 by the pressure detection unit in the liquid inlet chamber 105 and the medicine chamber 102;
C. the control unit 116 controls the liquid fuel and gas delivery device to supplement the combustion chamber 203 with liquid fuel and air or oxygen according to the pressure difference detected in the liquid inlet chamber 105 and the medicine chamber 102, and controls the ignition device to perform secondary ignition; or the unloading valve 209 is controlled to partially unload the combustion high pressure in the combustion chamber 203;
D. when the control unit 116 receives an injection completion signal or a signal from the operator to release the trigger 108, the solenoid valve 207 is opened to pull the piston 202 back to the position to be advanced, and the unloader valve 209 is controlled to completely unload the combustion high pressure in the combustion chamber 203.
The control of the unloading valve 209 partially unloads the combustion high pressure in the combustion chamber 203, and in particular, the opening time of the unloading valve 209 can be adjusted to a short time, so that the residual pressure can be ensured to be still enough to inject the medicament into the livestock body, and negative pressure caused by excessive pressure drop can be avoided.
In the fuel-powered needleless continuous injection method according to the embodiment of the present invention, the control unit 116 controls the liquid fuel and gas delivery device to supplement the combustion chamber 203 with the liquid fuel and air or oxygen according to the pressure difference between the liquid inlet chamber 105 and the medicine chamber 102, and controls the ignition device to perform secondary ignition; or controlling the unloading valve 209 to partially unload the combustion high pressure in the combustion chamber 203 includes:
when the pressure difference between the inlet chamber 105 and the medicine chamber 102 is greater than the first threshold value, the unloading valve 209 is controlled to partially unload the combustion high pressure in the combustion chamber 203;
when the pressure difference between the inlet chamber 105 and the medicament chamber 102 is less than the second threshold, the liquid fuel and gas delivery device is controlled to supplement the combustion chamber 203 with liquid fuel and air or oxygen, and the ignition device is controlled to perform secondary ignition, so that the pressure in the inlet chamber 105 is increased.
More particularly, the present invention may have an improved technical solution, by performing secondary ignition for multiple times or unloading high pressure for multiple times through a preset step value, to gradually increase the pressure in the liquid inlet chamber 105 or gradually unload the combustion high pressure in the combustion chamber 203, so as to achieve the technical effects of smooth operation and reduced stress reaction.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the form disclosed herein, but is not to be construed as limited to other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of changes or modifications within the scope of the inventive concept as described herein, either as a result of the foregoing teachings or as a result of the knowledge or skills of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (8)
1. A fuel power needleless continuous injection device comprises a needleless injection gun and a combustion hydraulic cavity separated from the needleless injection gun; the needle-free injection gun comprises a gun body with a hollow columnar structure, wherein a plunger capable of reciprocating between a position to be injected and an injection position is arranged in the gun body, and the interior of the gun body is divided into a medicament cavity and a liquid inlet cavity by the plunger; in addition, the combustion hydraulic cavity is of a hollow columnar structure, the hollow columnar structure comprises a piston capable of reciprocating between a to-be-propelled position and a propelled position, and the combustion hydraulic cavity is divided into a liquid outlet cavity and a combustion chamber by the piston.
2. The fuel-powered needleless continuous injection device of claim 1, wherein the needle-less injection gun has an operating handle and a trigger at a lower end of a gun body, and wherein the combustion chamber has an ignition device, the trigger and the ignition device being connected to a control unit for controlling the activation of the liquid fuel and gas delivery device to deliver liquid fuel and air or oxygen to the combustion chamber and controlling the ignition device in the combustion chamber to ignite a mixture of liquid fuel and air or oxygen when the trigger is actuated by an operator.
3. The fuel-powered needleless continuous injection device of claim 1, wherein the operating handle has a cavity therein, the cavity housing the control unit and a battery, the battery providing power to the control unit and to the pressure sensing unit in the fluid and medicament inlet chambers.
4. The fuel-powered needleless continuous injection device of claim 1, wherein the liquid fuel and gas delivery means of the combustion chamber comprises a fuel delivery tube and an air intake tube connected to a rear end of the combustion chamber, and a fuel bottle connected to the fuel delivery tube, wherein the air intake tube supplies air or oxygen to the combustion chamber, and wherein the liquid fuel and gas delivery means further comprises a fuel delivery pump and an air or oxygen delivery pump disposed in the fuel delivery tube and the air intake tube.
5. The continuous injection device of fuel-powered needleless head as claimed in claim 2, in which the outside of the combustion chamber has an electromagnetic coil in a position corresponding to the position of the piston to be advanced, the power supply unit of the electromagnetic coil being connected to the control unit, the piston being of ferromagnetic material; when the operator releases the trigger, the control unit controls the electromagnetic coil to be electrified, and the piston is pulled back to the position to be propelled; accordingly, the plunger is retracted to the position to be injected.
6. The continuous injection device of fuel-powered needleless head as claimed in claim 2, wherein the combustion chamber of the combustion chamber has an external unloading hole at the rear end thereof, the unloading hole being covered by an unloading valve connected to the control unit for opening the unloading valve when the control unit detects that the trigger is released or when a control command is issued by the control unit according to a pressure difference of the pressure detecting unit in the liquid inlet chamber and the medicine chamber, and the combustion high pressure in the combustion chamber is unloaded.
7. The fuel-powered needleless continuous injection device of claim 2, wherein the front end of the medicament chamber of the needleless injection gun is a hollow conical structure, the front end of the plunger is conical in shape matching the inner surface of the hollow conical structure, the fuel-powered needleless continuous injection device further comprises a medicament bottle fixed to the body of the needleless injection gun, the medicament bottle is a hollow cylindrical structure filled with medicament, the rear end is provided with an air inlet hole, the middle part is provided with a movable plug, and the front end is provided with a medicament outlet; the space between the movable plug and the front end of the medicament bottle is filled with liquid medicament; the conical outer surface of the needle-free injection gun medicament cavity is provided with a medicament inlet which is connected to a medicament outlet at the front end of the medicament bottle through a medicament delivery pipe; a one-way valve is provided at the medicament inlet for one-way delivery of medicament from the medicament vial to the medicament chamber of the needle-less injection gun.
8. The fuel-powered needleless continuous injection device of claim 7, wherein the needle-less injection gun has a contact switch on the inside of the forward end of the medicament chamber, the contact switch being connected to the control unit for sending an injection complete signal to the control unit when the forward end of the plunger contacts the contact switch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310082394.9A CN115804890B (en) | 2023-02-08 | 2023-02-08 | Fuel-powered needleless continuous injection device and method |
| CN202310370834.0A CN116271343A (en) | 2023-02-08 | 2023-02-08 | Continuous injection method of fuel power needleless head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310082394.9A CN115804890B (en) | 2023-02-08 | 2023-02-08 | Fuel-powered needleless continuous injection device and method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310370834.0A Division CN116271343A (en) | 2023-02-08 | 2023-02-08 | Continuous injection method of fuel power needleless head |
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| Publication Number | Publication Date |
|---|---|
| CN115804890A CN115804890A (en) | 2023-03-17 |
| CN115804890B true CN115804890B (en) | 2023-05-19 |
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|---|---|---|---|
| CN202310082394.9A Active CN115804890B (en) | 2023-02-08 | 2023-02-08 | Fuel-powered needleless continuous injection device and method |
| CN202310370834.0A Pending CN116271343A (en) | 2023-02-08 | 2023-02-08 | Continuous injection method of fuel power needleless head |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310370834.0A Pending CN116271343A (en) | 2023-02-08 | 2023-02-08 | Continuous injection method of fuel power needleless head |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2331030A1 (en) * | 2000-02-16 | 2001-08-16 | Roche Diagnostics Gmbh | Hypodermic needleless injection system |
| GB0012165D0 (en) * | 2000-05-20 | 2000-07-12 | Team Consulting Ltd | Portable device with consistent power output |
| US20040162517A1 (en) * | 2002-12-04 | 2004-08-19 | Otto Furst | Needleless hydpodermic injection device with non-electric ignition means |
| EP1570875A1 (en) * | 2004-03-04 | 2005-09-07 | Roche Diagnostics GmbH | Pyrotechnically driven needle-free liquid jet injection device with low-cost components and production |
| CN101428159B (en) * | 2007-11-09 | 2011-04-27 | 沈阳航天新光低温容器制造有限责任公司 | Injector without needle for animals |
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2023
- 2023-02-08 CN CN202310082394.9A patent/CN115804890B/en active Active
- 2023-02-08 CN CN202310370834.0A patent/CN116271343A/en active Pending
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| CN115804890A (en) | 2023-03-17 |
| CN116271343A (en) | 2023-06-23 |
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