A multi-barrel syringe for veterinary use

Abstract

The present invention belongs to the technical field of syringes, and in particular relates to a multi-barreled syringe for veterinary use, comprising a syringe assembly, a pressure liquid assembly, and an injection needle assembly. The syringe assembly is used to mix multiple liquid medicines in proportion during the injection process, the pressure liquid assembly is used to store the mixed liquid medicines ejected by the syringe assembly and automatically discharge the medicines at a timed interval, and the injection needle assembly is used to inject the mixed liquid medicines discharged by the pressure liquid assembly into the animal's body at a timed interval and automatically detach. The injection needle assembly of the present invention can complete the timed injection and needle removal of the animal without restricting the animal's activity space. The injection needle assembly can move with the animal during the injection process. Compared with injecting animals that are confined to a small space, the injection needle assembly can efficiently inject a larger number of animals.

Description

Technical Field

[0001] The invention belongs to the technical field of syringes, and in particular relates to a multi-barrel syringe for animals. Background Art

[0002] Veterinary syringes are commonly used in many industries such as animal husbandry, epidemic prevention, textiles, chemicals and food for continuous injection. However, there are still the following problems in their use:

[0003] 1. Injection is often accompanied by intense pain, and the animal will involuntarily avoid or move around, affecting the injection. To ensure that the injection is not affected by the animal's movement, the injected animal is usually kept in a small, restricted space to prevent the animal from making large movements during the injection process. However, when a large number of animals are injected, this method of using a small space to restrict the animal's movement range is less efficient.

[0004] 2. General syringes are single-barrel syringes. If multiple drugs need to be injected simultaneously, they need to be mixed in a container and injected at once using a single-barrel syringe. However, the mixing of drugs increases the injection time and the injection efficiency is low. With the development of syringe technology, single-barrel syringes have evolved into double-barrel syringes, which can inject two drugs at the same time and achieve efficient injection. However, syringes with more barrels do not exist in the market due to their limited application scenarios, and there is no need for research and development. Using double-barrel syringes to inject more than two drugs also has the problem of low injection efficiency.

[0005] 3. For multi-barrel syringes, the injection volume of a single drug cannot be adjusted individually according to specific actual needs, which is inconvenient to use.

[0006] 4. Whether it is a single-barrel syringe or a multi-barrel syringe, a certain injection speed is required during the injection process. The injection speed cannot be too fast. The current syringe injection speed is controlled manually, and the injection speed cannot be accurately controlled.

[0007] The present invention designs a veterinary multi-barrel syringe to solve the above problems. Summary of the Invention

[0008] Therefore, it is necessary to address the problems of current syringes and provide a multi-barreled veterinary syringe. The needle assembly of the present invention can complete timed injections and needle removal without restricting the animal's movement space. The needle assembly can move with the animal during the injection process, allowing for efficient injections of a larger number of animals compared to confining the animal to a small space. The syringe assembly of the present invention, in conjunction with a single-barreled container assembly or a double-barreled container assembly, can achieve proportional mixing and ultimately quantitative injection of two to four drugs during simultaneous injection, effectively improving the efficiency of simultaneous multi-drug injection. The two injection cartridges of the syringe assembly of the present invention can independently adjust the amount of liquid medicine entering them, and the double-barreled container assembly mounted on the first mounting seat of each injection cartridge can select two second containers with corresponding radius ratios based on the desired ratio of the two liquid medicines, thereby achieving proportional quantitative mixing of multiple drugs during injection. The needle assembly of the present invention achieves timed injections under the combined action of a sixth spring, a seventh spring, and a damping structure formed by a damping cylinder. The injection speed is automatically controlled within a constant speed range, eliminating the need for manual speed control. The liquid pressure component in the present invention can automatically complete the injection of a quantitative mixed medicine into the animal's body through the injection needle component after the syringe component completes injecting a quantitative mixed medicine into the elastic bag therein, ensuring that the injection needle component can still complete the medicine injection normally after being disconnected from the syringe component due to the animal's large-scale movement.

[0009] The above purpose is achieved through the following technical solutions:

[0010] A multi-barreled syringe for veterinary use, used for proportional and quantitative injection of multiple liquid medicines into animals, comprising:

[0011] The syringe assembly is used to mix multiple liquid medicines in proportion during the injection process.

[0012] The liquid pressing component is used to store the mixed liquid medicine injected by the syringe assembly and discharge the medicine at a fixed time.

[0013] The injection needle assembly is used to inject the mixed liquid medicine discharged from the liquid pressure assembly into the animal body at a fixed time and automatically detach.

[0014] In one embodiment, the injection needle assembly includes a circular plate, and a third guide rod is slidably provided in three first slide grooves evenly distributed on the circular plate. One end of the three third guide rods is provided with a first ring plate, and the other end of the third guide rod is provided with a second limit block to prevent it from escaping from the first slide groove. A fourth ring sleeve is provided in the first ring plate, and a cylindrical liquid shell is slidably provided in the fourth ring sleeve. One end of the liquid shell is provided with a first injection nozzle for mounting a needle, and the other end of the liquid shell is fixedly connected to the circular plate through a push rod. The side wall of the shell is provided with a second liquid inlet pipe, and the second liquid inlet pipe moves in the second slide groove on the fourth ring sleeve. A damping cylinder is slidably provided on the push rod, and a third piston is provided on the push rod. The third piston slides in the damping cylinder in a sealed manner. The third piston is provided with three liquid holes evenly distributed in the circumference and passing through both ends. The circular plate is provided with three lock assemblies corresponding to the third guide rods and cooperating with the corresponding lock grooves on the third guide rods. The end surface of the damping cylinder is provided with three second trigger rods corresponding to the lock assemblies. The second trigger rod slides in the socket on the circular plate. A circular ring is provided on the outer side of the damping cylinder. Three third sliding grooves are circumferentially formed on the cylindrical surface of the circular ring. A first inner rod is slidably provided in the third sliding groove and cooperates with a first limit block in one end of a fourth ring sleeve. A connecting rod is provided on the first inner rod. The first limit block is provided with a first inclined surface. The third annular groove is provided with a fourth spring for causing the corresponding first inner rod to move outward. Three circumferentially evenly distributed first trigger rods slide axially in the fourth guide sleeve on the outer side of the damping cylinder. A fifth spring is provided in the fourth guide sleeve for resetting the first trigger rod. One end of the first trigger rod cooperates with the circular plate, and the other end of the first trigger rod cooperates with the inclined rod on the corresponding connecting rod. A sixth spring is connected between the first ring plate and the circular plate. A seventh spring is connected between the second ring plate on the outer side of the damping cylinder and the circular plate. A positioning sleeve is provided on the circular plate for positioning the sixth spring. A handle is provided on the edge of the circular plate. Anti-slip grooves are provided on the outer cylindrical surface of the handle. A pressure ring is provided on the end of the fourth ring sleeve for cooperating with the surface of the animal.

[0015] In one embodiment, the lock assembly includes a rod sleeve, which slides radially along the circular plate in a third guide sleeve on the circular plate, and a second inner rod is slidingly provided in the rod sleeve to cooperate with the corresponding lock groove on the third guide rod, and a second inclined surface is provided on the inner wall of the lock groove. An eighth spring is provided in the rod sleeve to move the second inner rod toward the third guide rod, and a third inclined surface is provided at the end of the rod sleeve to cooperate with the corresponding second trigger rod. Two tension spring plates are symmetrically provided on the rod sleeve, and the tension spring plates are connected to the end face of the third guide sleeve through a ninth spring.

[0016] In one embodiment, the syringe assembly includes two injection cartridges fixedly connected together, the end of the injection cartridge is provided with a first injection nozzle and a pipette, the pipette is provided with a first one-way valve assembly, the end of the pipette is provided with a first mounting seat for mounting a single-tube container assembly or a double-tube container assembly, the middle part of the first mounting seat is provided with a first plug that is connected to the pipette and cooperates with the single-tube container assembly or the double-tube container assembly, a first piston is slidably provided in the injection cartridge, a first push-pull rod is provided at the end of the first piston, the first push-pull rod is slidably provided in a circular groove at the end of the second push-pull rod, a first spring is provided in the circular groove to contract the first push-pull rod and the second push-pull rod to the limit, one end of the first spring is connected to the first push-pull rod The first compression spring ring on the pull rod is connected, and the other end of the first spring is connected to the inner wall of the circular groove. A first ring sleeve is axially sliding in the injection cartridge, and the first ring sleeve is provided with a scale indicating the amount of medicine in the injection cartridge. A transparent window is provided on the wall of the injection cartridge, and a marking line indicating the scale on the first ring sleeve is provided in the middle of the transparent window. A second ring sleeve threadedly connected to the first ring sleeve is rotatably provided in the injection cartridge, and a rotary sleeve connected to the second ring sleeve is provided on the outside of the injection cartridge, and anti-slip grooves are provided on the outer cylindrical surface of the rotary sleeve. The end of the second push-pull rod is hinged with a connecting rod, and the end of the connecting rod is hinged with a first handle. The first handle is hinged to the second handle provided on the injection cartridge, and a vortex spring is connected between the first handle and the second handle.

[0017] In one embodiment, the single-tube container assembly consists of a first container and a first sealing film at the mouth of the first container. The first container is threadedly engaged with the corresponding first mounting seat, and the first container is engaged with a first sealing gasket provided in the first mounting seat.

[0018] In one embodiment, the double-tube container assembly includes a U-shaped tube, a second mounting seat is provided at both ends of the U-shaped tube, a second plug connected to the U-shaped tube is provided in the middle of the second mounting seat, a reducer connected to the U-shaped tube and a third ring sleeve threadedly connected to the corresponding first mounting seat are provided in the middle of the U-shaped tube, a second sealing gasket and a first sealing gasket are respectively provided between the reducer and the third ring sleeve and the corresponding first mounting seat, a second container is threadedly installed on the second mounting seat, a third sealing gasket is provided between the second container and the second mounting seat, a second sealing film is provided at the mouth of the second container, and two second pistons synchronously connected by U rods are slidably provided in the two second containers corresponding to the U-shaped tube.

[0019] In one embodiment, the first one-way valve assembly includes a first shell arranged on the pipette, a first guide sleeve is arranged in the first shell through a first fixed rod, a first guide rod is slidably arranged in the first guide sleeve, a first valve plug for switching the pipette is arranged at the end of the first guide rod, and a second spring is connected between the first valve plug and the first guide sleeve.

[0020] In one embodiment, the pressure liquid component includes an elastic bag, and a first liquid inlet pipe and a liquid outlet pipe are respectively provided at both ends of the elastic bag. The first liquid inlet pipe is connected to the first injection nozzles of the two injection cartridges through a Y-shaped first hose, the first hose is plugged into the first injection nozzle and is threadedly connected to the first liquid inlet pipe, the liquid outlet pipe is connected to the second liquid inlet pipe through a second hose, and the two ends of the second hose are respectively threadedly connected to the liquid outlet pipe and the second liquid inlet pipe, a second one-way valve assembly is provided on the first liquid inlet pipe, and a third one-way valve assembly is provided on the liquid outlet pipe.

[0021] In one embodiment, the structure of the second one-way valve assembly is the same as that of the third one-way valve assembly, and the second one-way valve assembly includes a second shell, which is arranged in the first liquid inlet pipe or the liquid outlet pipe, and a second guide sleeve is arranged in the second shell through a second fixed rod, and a second guide rod is slidably arranged in the second guide sleeve, and a second valve plug for switching the first liquid inlet pipe or the liquid outlet pipe is provided at the end of the second guide rod, and a third spring is connected between the second valve plug and the second guide sleeve.

[0022] In one embodiment, two limit rods for limiting the opening range of the corresponding second valve plugs are provided in the second housing of the third one-way valve assembly.

[0023] The injection cartridge and the corresponding first ring sleeve are matched with a guide block and a guide groove.

[0024] The beneficial effects of the present invention are:

[0025] 1. The injection needle assembly of the present invention can complete the timed injection and needle removal of animals without restricting the animal's activity space. The injection needle assembly can move with the animal during the injection process. Compared with injecting animals in a small space, the injection needle assembly can efficiently inject a larger number of animals.

[0026] 2. The syringe assembly of the present invention can achieve proportional mixing of two to four drugs during the simultaneous injection process and ultimately complete quantitative injection by cooperating with a single-tube container assembly or a double-tube container assembly, effectively improving the efficiency of simultaneous injection of multiple drugs.

[0027] 3. The two injection cartridges of the syringe assembly in the present invention can individually adjust the amount of liquid medicine entering therein, and the double-tube container assembly installed on the first mounting seat of each injection cartridge can select two second containers with corresponding radius ratios according to the ratio of the two required liquid medicines, thereby realizing proportional quantitative mixing of multiple drugs during the injection process.

[0028] 4. The injection needle assembly of the present invention completes injection at a fixed time under the joint action of the sixth spring, the seventh spring and the damping structure formed by the damping cylinder. The injection speed is automatically controlled within a constant speed range without the need for manual control of the injection speed.

[0029] 5. The hydraulic assembly of the present invention can automatically complete the injection of a quantitative mixed drug into the animal's body through the injection needle assembly after the syringe assembly quickly completes the injection of a quantitative mixed drug into the elastic bag inside the syringe assembly, ensuring that the injection needle assembly can still complete the drug injection normally after being disconnected from the syringe assembly due to the animal's large-scale movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall schematic diagram of the present invention in cooperation with two single-tube container assemblies;

[0031] Figure 2 It is an overall schematic diagram of the present invention in cooperation with two double-tube container assemblies;

[0032] Figure 3 is a schematic diagram of the syringe assembly;

[0033] Figure 4 It is a cross-sectional view of the internal structure of the injection cartridge;

[0034] Figure 5 This is a cross-sectional view of the matching structure of the injection cartridge and the first ring sleeve;

[0035] Figure 6 is a cross-sectional view of a first one-way valve assembly;

[0036] Figure 7 This is a cross-sectional view of the connection between the first handle and the second handle;

[0037] Figure 8 It is a single tube container assembly and its cross-sectional view;

[0038] Figure 9 It is the structure where the second mounting seat in the double-tube container assembly is located and its cross-sectional view;

[0039] Figure 10 is a second container in a double-tube container assembly and a cross-sectional view thereof;

[0040] Figure 11 is a cross-sectional view of the double-tube container assembly and the first mounting seat;

[0041] Figure 12 is a cross-sectional view of the cooperation between the single tube container assembly and the first mounting seat;

[0042] Figure 13 These are the two states of the hydraulic component and its cross-sectional view;

[0043] Figure 14 is a cross-sectional view of a third one-way valve assembly;

[0044] Figure 15 is a cross-sectional view of a second one-way valve assembly;

[0045] Figure 16 is a schematic diagram of an injection needle assembly;

[0046] Figure 17 is a cross-sectional view of an injection needle assembly;

[0047] Figure 18 This is a cross-sectional view of the first trigger rod and the oblique rod on the first inner rod;

[0048] Figure 19 This is a cross-sectional view of the lock assembly and the lock groove on the third guide rod;

[0049] Figure 20 It is a cross-sectional view of the lock assembly structure;

[0050] Figure 21 It is the connection structure between the circular plate, the push rod and the liquid shell and its cross-sectional view;

[0051] Figure 22 It is the structure on the fourth ring sleeve and its cross-sectional view;

[0052] Figure 23 It is the structure on the damping cylinder and its cross-sectional view;

[0053] Name of the label in the figure:

[0054] 100, syringe assembly; 101, injection cartridge; 102, transparent window; 103, first injection nozzle; 104, pipette; 105, first mounting seat; 106, first sealing gasket; 107, first plug; 108, first piston; 109, first push-pull rod; 110, first compression spring ring; 111, first spring; 112, second push-pull rod; 113, first ring sleeve; 114, guide groove; 115, guide block; 116, second ring sleeve; 117, rotary sleeve; 118, connecting rod; 119, first handle; 120, second handle; 121, vortex spring;

[0055] 200, first one-way valve assembly; 201, first housing; 202, first fixing rod; 203, first guide sleeve; 204, first guide rod; 205, first valve plug; 206, second spring;

[0056] 300, single tube container assembly; 301, first container; 302, first sealing film;

[0057] 400, double-tube container assembly; 401, third ring; 402, U-shaped tube; 403, reducer; 404, second mounting base; 405, third sealing gasket; 406, second plug; 407, second container; 408, second sealing film; 409, U-rod; 410, second piston; 411, second sealing gasket;

[0058] 500, hydraulic assembly; 501, elastic bladder; 502, first liquid inlet pipe; 503, liquid outlet pipe; 504, second one-way valve assembly; 505, third one-way valve assembly; 506, second housing; 507, second fixing rod; 508, second guide sleeve; 509, second guide rod; 510, second valve plug; 511, third spring; 512, limit rod; 513, first hose; 514, second hose.

[0059] 600, injection needle assembly; 601, circular plate; 602, first chute; 603, socket; 604, third guide sleeve; 605, handle; 606, positioning sleeve; 607, ejector pin; 608, liquid shell; 609, second injection nozzle; 610, second liquid inlet pipe; 611, fourth ring; 612, second chute; 613, pressure ring; 614, first stopper; 615, first inclined surface; 616, first ring plate; 617, third guide rod; 618, locking groove; 619, second inclined surface; 620, second stopper; 621, damping cylinder; 622, Fourth guide sleeve; 623, circular ring; 624, third slide groove; 625, first inner rod; 626, connecting rod; 627, inclined rod; 628, fourth spring; 629, first trigger rod; 630, fifth spring; 631, third piston; 632, liquid hole; 633, second ring plate; 634, second trigger rod; 635, sixth spring; 636, seventh spring; 637, lock assembly; 638, rod sleeve; 639, third inclined plane; 640, eighth spring; 641, second inner rod; 642, tension spring plate; 643, ninth spring; 644, needle. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0061] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like, indicating positions or relationships, are based on those shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or element referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention.

[0062] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0063] like Figure 1-Figure 23 As shown, a veterinary multi-barrel syringe is used for proportional quantitative injection of multiple liquid medicines into animals, comprising:

[0064] The syringe assembly 100 is used to mix multiple liquid medicines in proportion during the injection process.

[0065] The liquid pressing assembly 500 is used to store the mixed liquid medicine injected by the syringe assembly 100 and to discharge the medicine at a fixed time.

[0066] The injection needle assembly 600 is used to inject the mixed liquid medicine discharged by the liquid pressure assembly 500 into the animal body at a fixed time and automatically detach.

[0067] In a further embodiment, Figure 16 、 Figure 17 、 Figure 18 、 Figure 19 、 Figure 20 、 Figure 21 、 Figure 22 、 Figure 23As shown, the injection needle assembly 600 includes a circular plate 601, and a third guide rod 617 is slidably provided in three first chute 602 uniformly distributed on the circular plate 601. One end of the three third guide rods 617 is provided with a first ring plate 616, and the other end of the third guide rod 617 is provided with a second limit block 620 to prevent it from escaping from the first chute 602. A fourth ring sleeve 611 is provided in the first ring plate 616, and a cylindrical liquid shell 608 is slidably provided on the fourth ring sleeve 611. One end of the liquid shell 608 is provided with a first injection nozzle 103 for mounting a needle 644, and the other end of the liquid shell 608 is fixedly connected to the circular plate 601 through a push rod 607. The side wall of the liquid shell 608 is provided with a A second liquid inlet pipe 610 is provided, and the second liquid inlet pipe 610 moves in the second slide groove 612 on the fourth ring sleeve 611. A damping cylinder 621 is slidably provided on the push rod 607, and a third piston 631 is provided on the push rod 607. The third piston 631 slides in the damping cylinder 621 in a sealed manner. The third piston 631 is provided with three liquid holes 632 evenly distributed in the circumference and passing through both ends thereof. Three lock assemblies 637 corresponding to the third guide rod 617 and cooperating with the lock groove 618 on the corresponding third guide rod 617 are provided on the circular plate 601. Three second trigger rods 634 corresponding to the lock assemblies 637 are provided on the end surface of the damping cylinder 621. The second trigger rod 6 34 slides in the socket 603 on the circular plate 601, and a circular ring 623 is provided on the outer side of the damping cylinder 621. Three third sliding grooves 624 are opened circumferentially on the cylindrical surface of the circular ring 623. A first inner rod 625 cooperating with the first limit block 614 at one end of the fourth ring sleeve 611 is slidably provided in the third sliding groove 624. A connecting rod 626 is provided on the first inner rod 625, and a first inclined surface 615 is provided on the first limit block 614. The third annular groove is provided with a fourth spring 628 that causes the corresponding first inner rod 625 to move outward. Three first trigger rods 629 evenly distributed in the circumferential direction slide axially in the fourth guide sleeve 622 on the outer side of the damping cylinder 621. There is a fifth spring 630 for resetting the first trigger rod 629. One end of the first trigger rod 629 cooperates with the circular plate 601, and the other end of the first trigger rod 629 cooperates with the oblique rod 627 on the corresponding connecting rod 626. A sixth spring 635 is connected between the first ring plate 616 and the circular plate 601. A seventh spring 636 is connected between the second ring plate 633 on the outer side of the damping cylinder 621 and the circular plate 601. A positioning sleeve 606 for positioning the sixth spring 635 is provided on the circular plate 601. A handle 605 is provided on the edge of the circular plate 601, and anti-slip grooves are provided on the outer cylindrical surface of the handle 605. The end of the fourth ring sleeve 611 is provided with a pressure ring 613 that cooperates with the surface of the animal.

[0068] In a further embodiment, Figure 20As shown, the lock assembly 637 includes a rod sleeve 638, which slides radially along the circular plate 601 in the third guide sleeve 604 on the circular plate 601, and a second inner rod 641 is slidingly provided in the rod sleeve 638 to cooperate with the locking groove 618 on the corresponding third guide rod 617, and a second inclined surface 619 is provided on the inner wall of the locking groove 618. An eighth spring 640 is provided in the rod sleeve 638 to move the second inner rod 641 toward the third guide rod 617, and a third inclined surface 639 is provided at the end of the rod sleeve 638 to cooperate with the corresponding second trigger rod 634. Two tension spring plates 642 are symmetrically provided on the rod sleeve 638, and the tension spring plate 642 is connected to the end face of the third guide sleeve 604 through a ninth spring 643.

[0069] In a further embodiment, Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 As shown, the syringe assembly 100 includes two injection cartridges 101 that are fixedly connected together. The end of the injection cartridge 101 is provided with a first injection nozzle 103 and a pipette 104. The pipette 104 is provided with a first one-way valve assembly 200. The end of the pipette 104 is provided with a first mounting seat 105 for mounting a single-tube container assembly 300 or a double-tube container assembly 400. The middle part of the first mounting seat 105 is provided with a valve that is connected to the pipette 104 and connected to the single-tube container. The first plug 107 of the assembly 300 or the double-tube container assembly 400 is matched with the first plug 107, the injection cartridge 101 is provided with a first piston 108 which is slidably arranged, the end of the first piston 108 is provided with a first push-pull rod 109, the first push-pull rod 109 is slidably arranged in a circular groove at the end of the second push-pull rod 112, the circular groove is provided with a first spring 111 which makes the first push-pull rod 109 and the second push-pull rod 112 contract to the limit, one end of the first spring 111 is connected to the first push-pull rod 109 The first compression spring ring 110 is connected to the first compression spring ring 110 on the top, and the other end of the first spring 111 is connected to the inner wall of the circular groove. A first ring sleeve 113 is axially slidable in the injection cartridge 101. The first ring sleeve 113 is provided with a scale indicating the amount of medicine in the injection cartridge 101. A transparent window 102 is provided on the wall of the injection cartridge 101. A marking line indicating the scale on the first ring sleeve 113 is provided in the middle of the transparent window 102. A ring sleeve 113 is provided in the injection cartridge 101 to rotate with the first ring sleeve 113. 3 is threadedly connected to the second ring sleeve 116, and a rotary sleeve 117 connected to the second ring sleeve 116 is provided on the outside of the injection cartridge 101. The outer cylindrical surface of the rotary sleeve 117 is provided with anti-slip grooves. The end of the second push-pull rod 112 is hingedly connected to a connecting rod 118, and the end of the connecting rod 118 is hingedly connected to a first handle 119. The first handle 119 is hingedly connected to a second handle 120 provided on the injection cartridge 101, and a vortex spring 121 is connected between the first handle and the second handle 120.

[0070] In a further embodiment, Figure 8 、 Figure 12 As shown, the single-tube container assembly 300 consists of a first container 301 and a first sealing film 302 at the mouth of the first container 301 . The first container 301 is threadedly engaged with the corresponding first mounting seat 105 , and the first container 301 is engaged with the first sealing gasket 106 provided in the first mounting seat 105 .

[0071] In a further embodiment, Figure 9 、 Figure 10 、 Figure 11 As shown, the double-tube container assembly 400 includes a U-shaped tube 402, and second mounting seats 404 are provided at both ends of the U-shaped tube 402. A second plug 406 communicating with the U-shaped tube 402 is provided in the middle of the second mounting seat 404. A reducer 403 communicating with the U-shaped tube 402 and a third ring sleeve 401 threadedly connected to the corresponding first mounting seat 105 are provided in the middle of the U-shaped tube 402. A second sealing gasket 411 and a first sealing gasket 106 are respectively provided between the reducer 403 and the third ring sleeve 401 and the corresponding first mounting seat 105. A second container 407 is threadedly installed on the inner surface of the second mounting seat 404, and a third sealing gasket 405 is provided between the second container 407 and the second mounting seat 404. A second sealing film 408 is provided at the mouth of the second container 407, and two second pistons 410 synchronously connected by a U rod 409 are slidably provided in the two second containers 407 corresponding to the U-shaped tube 402.

[0072] In a further embodiment, Figure 6 As shown, the first one-way valve assembly 200 includes a first shell 201 arranged on the pipette 104, a first guide sleeve 203 is arranged in the first shell 201 through a first fixed rod 202, a first guide rod 204 is slidably arranged in the first guide sleeve 203, and a first valve plug 205 for switching the pipette 104 is arranged at the end of the first guide rod 204, and a second spring 206 is connected between the first valve plug 205 and the first guide sleeve 203.

[0073] In a further embodiment, Figure 1 、 Figure 2 、 Figure 13As shown, the pressure liquid component 500 includes an elastic bag 501, and the two ends of the elastic bag 501 are respectively provided with a first liquid inlet pipe 502 and a liquid outlet pipe 503, the first liquid inlet pipe 502 is connected to the first injection nozzles 103 of the two injection cartridges 101 through a Y-shaped first hose 513, the first hose 513 is plugged into the first injection nozzle 103 and is threadedly connected to the first liquid inlet pipe 502, the liquid outlet pipe 503 is connected to the second liquid inlet pipe 610 through a second hose 514, and the two ends of the second hose 514 are respectively threadedly connected to the liquid outlet pipe 503 and the second liquid inlet pipe 610, the first liquid inlet pipe 502 is provided with a second one-way valve assembly 504, and the liquid outlet pipe 503 is provided with a third one-way valve assembly 505.

[0074] In a further embodiment, Figure 13 、 Figure 15 As shown, the structure of the second one-way valve assembly 504 is the same as that of the third one-way valve assembly 505. The second one-way valve assembly 504 includes a second shell 506, which is arranged in the first liquid inlet pipe 502 or the liquid outlet pipe 503. A second guide sleeve 508 is provided in the second shell 506 through a second fixed rod 507. A second guide rod 509 is slidingly provided in the second guide sleeve 508. A second valve plug 510 for switching the first liquid inlet pipe 502 or the liquid outlet pipe 503 is provided at the end of the second guide rod 509. A third spring 511 is connected between the second valve plug 510 and the second guide sleeve 508.

[0075] In a further embodiment, Figure 13 、 Figure 14 As shown, two limiting rods 512 for limiting the opening range of the corresponding second valve plug 510 are provided in the second housing 506 of the third one-way valve assembly 505.

[0076] The guide block 115 and the guide groove 114 cooperate with each other between the injection cartridge 101 and the corresponding first ring sleeve 113 .

[0077] The injection needle assembly 600 of the present invention allows for timed injection and needle removal without restricting the animal's movement space. The needle assembly 600 can move with the animal during the injection process, enabling efficient injections for a larger number of animals compared to confining the animal to a small space. The syringe assembly 100 of the present invention, in conjunction with the single-tube container assembly 300 or the double-tube container assembly 400, can achieve proportional mixing and ultimately quantitative injection of two to four drugs during simultaneous injection, effectively improving the efficiency of simultaneous multi-drug injections. The two injection cartridges 101 of the syringe assembly 100 of the present invention can independently adjust the amount of liquid medicine entering them. The double-tube container assembly 400 mounted on the first mounting seat 105 of each injection cartridge 101 can select two second containers 407 with corresponding radius ratios based on the desired ratio of the two liquid medicines, thereby achieving proportional and quantitative mixing of multiple drugs during injection. The injection needle assembly 600 of the present invention achieves a timed injection under the combined action of the sixth spring 635, the seventh spring 636, and the damping structure formed by the damping cylinder 621. The injection speed is automatically controlled within a constant speed range, eliminating the need for manual speed control. The hydraulic assembly 500 of the present invention automatically completes the injection of a predetermined amount of mixed medication into the animal's body through the injection needle assembly 600 after the syringe assembly 100 completes the injection of a predetermined amount of mixed medication into the elastic bladder 501. This ensures that the injection needle assembly 600 can still complete the injection of medication even if it is disconnected from the syringe assembly 100 due to a large movement of the animal.

[0078] The operation process of the present invention is as follows:

[0079] In the initial state, the distance between the two first pistons 108 in the syringe assembly 100 and the first injection nozzle 103 end of the corresponding injection cartridge 101 is at a maximum limit, and the first piston 108 is against the end of the first ring sleeve 113, the vortex spring 121 is in a compressed state, the first handle 119 and the second handle 120 are opened to the maximum under the action of the vortex spring 121, the first spring 111 is in a compressed state, the first push-pull rod 109 and the second push-pull rod 112 are in a slightly stretched state, and the first one-way valve assembly 200 is in a closed state. The elastic bag 501 in the pressure liquid assembly 500 is in an extreme contraction state, the second one-way valve assembly 504 and the third one-way valve assembly 505 are in a closed state, there is a certain distance between the second valve plug 510 and the limit rod 512 in the third one-way valve assembly 505, the first liquid inlet pipe 502 is threadedly connected to the first hose 513, the first hose 513 is not inserted into the first injection nozzle 103 of the injection cartridge 101, and the liquid outlet pipe 503 is connected to the second liquid inlet pipe 610 in the injection needle assembly 600 through the second hose 514. The needle 644 in the injection needle assembly 600 is in an extremely contracted state in the fourth ring sleeve 611, the needle tip of the needle 644 is exposed, the sixth spring 635 and the seventh spring 636 are in a compressed state, the distance between the fourth ring sleeve 611 and the circular plate 601 is at its maximum, the first inner rod 625 is abutted against the corresponding first limit block 614 under the action of the corresponding fourth spring 628, the first trigger rod 629 is abutted against the corresponding oblique rod 627 under the action of the corresponding fifth spring 630, and the second inner rod 641 and the corresponding rod sleeve 638 in the lock assembly 637 are in an extremely extended state under the action of the corresponding eighth spring 640.

[0080] When it is necessary to use the present invention to inject two drugs into an animal in a proportional and quantitative manner, the position of the first ring sleeve 113 for limiting the movement amplitude of the first piston 108 in the injection cartridge 101 is first adjusted, and the rotary sleeve 117 is rotated. The rotary sleeve 117 drives the second ring sleeve 116 to rotate, and the second ring sleeve 116 drives the first ring sleeve 113 to move axially within the injection cartridge 101 by a certain amplitude. The first ring sleeve 113 drives the first piston 108 to move by a corresponding amplitude, so that the distance between the two first pistons 108 and the first injection nozzle 103 of the corresponding injection cartridge 101 matches the ratio of the two drugs to be injected. The first piston 108 drives the corresponding first push-pull rod 109 to extend a certain amplitude relative to the corresponding second push-pull rod 112 and further compresses the corresponding first spring 111. The marking line of the transparent window 102 of the injection cartridge 101 indicates the corresponding scale on the first ring sleeve 113.

[0081] Then, the first handle 119 and the second handle 120 are held by hand, so that the first handle 119 swings relative to the second handle 120 under the action of external force and further compresses the vortex spring 121. The first handle 119 drives the first pistons 108 in the two injection cartridges 101 to move to the first injection nozzle 103 end of the injection cartridge 101 through the first push-pull rod 109, the second push-pull rod 112 and the connecting rod 118 in the injection cartridge 101 to discharge the air in the injection cartridge 101. Then, the single-tube container assembly 300 is respectively installed on the two first mounting seats 105. After the single-tube container assembly 300 is installed, the mouth of the first container 301 of the single-tube container assembly 300 is squeezed with the first sealing gasket 106 in the corresponding first mounting seat 105 to form a seal, and the first plug 107 in the first mounting seat 105 pierces the first sealing film 302 at the mouth of the first container 301 to allow the medicine to enter the first container 301. Then, the first handle 119 is reset relative to the second handle 120 under the action of the vortex spring 121. The first handle 119 drives the first piston 108 to perform a reset movement through a series of transmissions and finally makes the first piston 108 abut against the first ring sleeve 113. The two first pistons 108 generate negative pressure in the injection cartridge 101 and allow the liquid medicine in the two single-tube container assemblies 300 to enter the injection cartridge 101 in proportion through the first one-way valve assembly 200.

[0082] Next, the first injection nozzle 103 of the injection cartridge 101 is connected to the first hose 513. Then, the handle 605 in the injection needle assembly 600 is held by hand to insert the needle 644 into the animal body. The pressing ring 613 is pressed against the surface of the animal body. The handle 605 drives the needle 644 to move relative to the fourth ring 611 through the circular plate 601, the push rod 607 and the liquid shell 608 and quickly inserts it into the animal body. The push rod 607 drives the third piston 631 to move in the damping cylinder 621. The damping cylinder 621 The damping oil in the damping cylinder 621 enters the space at the other end of the third piston 631 through the liquid hole 632 on the third piston 631, and the sixth spring 635 and the seventh spring 636 are further compressed. The second trigger rod 634 on the damping cylinder 621 drives the rod sleeve 638 to move toward the third guide rod 617 through the third inclined surface 639 at the end of the rod sleeve 638 of the lock assembly 637. The rod sleeve 638 drives the second inner rod 641 to resist the third guide rod 617 through the eighth spring 640, and the ninth spring 643 is stretched.

[0083] When the locking groove 618 on the third guide rod 617 is opposite to the second inner rod 641, the second inner rod 641 is instantly inserted into the locking groove 618 under the action of the eighth spring 640 and prevents the circular plate 601 from returning to the fourth ring sleeve 611. At this time, the first trigger rod 629 on the outer side of the damping cylinder 621 is just against the circular plate 601. As the circular plate 601 continues to move relative to the fourth ring sleeve 611, the second inner rod 641 in the lock assembly 637 moves to the outside of the locking groove 618 via the second inclined surface 619 on the inner wall of the corresponding locking groove 618. The first trigger rod 629 moves a certain amplitude relative to the damping cylinder 621 under the action of the circular plate 601 and further compresses the fifth spring 640. Spring 630, the first trigger rod 629 drives the corresponding first inner rod 625 to shrink in the corresponding third slide groove 624 through the corresponding oblique rod 627 and the connecting rod 626 and further compresses the fourth spring 628. The contraction of the first inner rod 625 releases the restriction of the first limit block 614 on the damping cylinder 621. The damping cylinder 621 moves into the fourth ring sleeve 611 under the action of the seventh spring 636. The damping oil on the side of the second trigger rod 634 in the damping cylinder 621 moves to the other end through the liquid hole 632, thereby making the movement of the damping cylinder 621 into the fourth ring sleeve 611 slow, ensuring that the needle 644 inserted into the body has enough time to inject the liquid medicine into the body.

[0084] During the movement of the damping cylinder 621 into the fourth ring sleeve 611, the first handle 119 and the second handle 120 are held by hand, so that the first handle 119 drives the second push-pull rod 112 to move into the injection cartridge 101 through the connecting rod 118. When the second push-pull rod 112 and the first push-pull rod 109 are relatively contracted to the shortest, the first push-pull rod 109 drives the first piston 108 to mix the drugs in the two injection cartridges 101 in proportion and quickly press them into the elastic bag 501 through the first hose 513 and the first liquid inlet pipe 502.

[0085] During the process of the medical liquid in the single-tube container assembly 300 entering the injection cartridge 101 through the first one-way valve assembly 200 , the first valve plug 205 of the first one-way valve assembly 200 opens and further compresses the second spring 206 . During the process of the syringe assembly 100 pressing the medicinal liquid into the elastic bag 501 of the liquid pressure assembly 500, the second valve plug 510 in the second one-way valve assembly 504 opens and further compresses the corresponding third spring 511, while the second valve plug 510 in the third one-way valve assembly 505 opens and further compresses the corresponding third spring 511 under the pressure and action of the medicine in the elastic bag 501. Since the second valve plug 510 in the third one-way valve assembly 505 is limited by the limiting rod 512, the opening range of the second valve plug 510 in the third one-way valve assembly 505 is small, so that the elastic bag 501 is quickly filled with medicinal liquid, and the medicinal liquid is slowly injected into the liquid shell 608 through the third one-way valve assembly 505. The medicinal liquid entering the liquid shell 608 is injected into the body through the needle 644.

[0086] When the animal feels pain and moves around, the syringe assembly 100 has already injected all of the two mixed liquids into the elastic bag 501. The animal will drive the first hose 513 out of the injection barrel 101 through the injection needle assembly 600 and the hydraulic assembly 500. After the hydraulic assembly 500 is separated from the syringe assembly 101, the elastic bag 501 in the hydraulic assembly 500 still injects the liquid medicine into the animal's body through the needle 644 without affecting the animal's movement.

[0087] When the damping cylinder 621 is completely reset relative to the circular plate 601, the liquid medicine in the elastic bag 501 has been completely injected into the animal's body. At this time, the second trigger rod 634 releases the trigger on the lock assembly 637. The lock assembly 637 is disengaged from the lock groove 618 of the third guide rod 617 under the action of the eighth spring 640 and the ninth spring 643. The circular plate 601 is reset relative to the fourth ring sleeve 611 under the action of the sixth spring 635. The circular plate 601 drives the liquid shell 608 to reset relative to the fourth ring sleeve 611 through the push rod 607. The needle 644 shrinks toward the fourth ring sleeve 611 and is gradually removed from the body. The push rod 607 drives the third piston 631 to reset in the damping cylinder 621. The liquid medicine at the end of the second trigger rod 634 in the damping cylinder 621 enters the space at the other end through the liquid hole 632 on the third piston 631.

[0088] During the process of resetting the circular plate 601 relative to the fourth ring sleeve 611, when the first trigger rod 629 is separated from the circular plate 601, the first trigger rod 629 is reset relative to the damping cylinder 621 under the action of the fifth spring 630, and the first inner rod 625 is reset under the action of the fourth spring 628. When the first inner rod 625 passes the first inclined surface 615 on the limit block, it contracts into the third slide groove 624 and does not hinder the movement of the damping cylinder 621 out of the fourth ring sleeve 611. After the damping cylinder 621 is reset relative to the fourth ring sleeve 611, the first inner rod 625 is reset under the action of the fourth spring 628.

[0089] When the needle 644 is reset relative to the fourth ring 611 , the portion inserted into the animal's body is less, and the injection needle assembly 600 can easily detach from the animal's body surface and fall off by itself during the animal's movement.

[0090] When three or four drugs need to be injected, the double-tube container assembly 400 needs to be installed on one or two first mounting seats 105 of the syringe assembly 100. The third ring sleeve 401 of the double-tube container assembly 400 is threadedly connected to the first mounting seat 105. The third ring sleeve 401 is squeezed with the first sealing gasket 106 in the first mounting seat 105 to form a seal. The second sealing gasket 411 at the end of the reducer 403 is squeezed and sealed with the first mounting seat 105. The first plug 107 in the first mounting seat 105 is inserted into the reducer 403. The second mounting seat 404 is threadedly connected to the second container 407. The second plug 406 in the second mounting seat 404 pierces the second sealing film 408 at the mouth of the second container 407 and is inserted into the liquid medicine in the second container 407. The mouth of the second container 407 is squeezed and sealed with the third sealing gasket 405 in the second mounting seat 404. The diameter ratio of the two second containers 407 in the double-tube container assembly 400 is selected according to the ratio of the drugs to be injected. The second pistons 410 in the two second containers 407 can inject the drug solution into the corresponding injection cartridges 101 in a proportional and quantitative manner during the synchronous movement of the U rod 409 under the action of negative pressure. The ratio and amount of the drug solution in the two injection cartridges 101 can be achieved by adjusting the amplitude of the two first pistons 108.

Claims

1. A multi-barreled syringe for veterinary use, used for proportional quantitative injection of multiple liquid medicines into animals, characterized in that: include: The syringe assembly is used to mix multiple liquid medicines in proportion during the injection process; The liquid pressing component is used to store the mixed liquid medicine injected by the syringe assembly and automatically discharge the medicine at a fixed time; The injection needle assembly is used to inject the mixed liquid medicine discharged from the liquid pressure assembly into the animal body at a fixed time and automatically detach; The injection needle assembly includes a circular plate, wherein third guide rods are slidably disposed in three first chute grooves evenly distributed circumferentially on the circular plate, a first ring plate being disposed at one end of the three third guide rods, and a second stop block being disposed at the other end of the third guide rods to prevent them from escaping from the first chute grooves, a fourth ring sleeve being disposed within the first ring plate, and a cylindrical liquid shell being slidably disposed in the fourth ring sleeve, a first injection nozzle for mounting a needle being disposed at one end of the liquid shell, and the other end of the liquid shell being fixedly connected to the circular plate via a push rod, a second liquid inlet pipe being disposed on the side wall of the liquid shell, and the second liquid inlet pipe moving in the second chute groove of the fourth ring sleeve, a damping cylinder being slidably disposed on the push rod, a third piston being disposed on the push rod, and the third piston sliding in a sealing manner within the damping cylinder, and three liquid-through holes being evenly distributed circumferentially and extending through both ends of the third piston, are formed on the circular plate, and three lock assemblies are disposed that correspond one-to-one to the third guide rods and engage with the lock grooves on the corresponding third guide rods, and three second trigger rods are disposed on the end surface of the damping cylinder, and the second trigger rods are engaged one-to-one with the lock assemblies. Sliding in the socket on the circular plate, a circular ring is provided on the outer side of the damping cylinder, and three third sliding grooves are opened circumferentially on the cylindrical surface of the circular ring. A first inner rod is slidingly provided in the third sliding groove and cooperates with a first limit block in one end of a fourth ring sleeve. A connecting rod is provided on the first inner rod, and a first inclined surface is provided on the first limit block. The third sliding groove is provided with a fourth spring for causing the corresponding first inner rod to move outward. Three first trigger rods evenly distributed in the circumferential direction slide axially in the fourth guide sleeve on the outer side of the damping cylinder. A fifth spring for resetting the first trigger rod is provided in the fourth guide sleeve. One end of the first trigger rod cooperates with the circular plate, and the other end of the first trigger rod cooperates with the inclined rod on the corresponding connecting rod. A sixth spring is connected between the first ring plate and the circular plate. A seventh spring is connected between the second ring plate on the outer side of the damping cylinder and the circular plate. A positioning sleeve for positioning the sixth spring is provided on the circular plate. A handle is provided on the edge of the circular plate. Anti-slip grooves are opened on the outer cylindrical surface of the handle. A pressure ring is provided on the end of the fourth ring sleeve for cooperating with the surface of the animal body.

2. A multi-barreled syringe for veterinary use according to claim 1, characterized in that: The lock assembly includes a rod sleeve, which slides radially along the circular plate in a third guide sleeve on the circular plate. A second inner rod is slidably provided in the rod sleeve and cooperates with a lock groove on the corresponding third guide rod. A second inclined surface is provided on the inner wall of the lock groove. An eighth spring is provided in the rod sleeve to move the second inner rod toward the third guide rod. A third inclined surface is provided at the end of the rod sleeve to cooperate with the corresponding second trigger rod. Two tension spring plates are symmetrically provided on the rod sleeve, and the tension spring plates are connected to the end face of the third guide sleeve through a ninth spring.

3. A multi-barrel syringe for veterinary use according to claim 1, characterized in that: The syringe assembly includes two injection cartridges fixedly connected together, the end of the injection cartridge is provided with a first injection nozzle and a pipette, the pipette is provided with a first one-way valve assembly, the end of the pipette is provided with a first mounting seat for mounting a single-tube container assembly or a double-tube container assembly, the middle part of the first mounting seat is provided with a first plug which is communicated with the pipette and cooperates with the single-tube container assembly or the double-tube container assembly, a first piston is slidably provided in the injection cartridge, a first push-pull rod is provided at the end of the first piston, the first push-pull rod is slidably provided in a circular groove at the end of the second push-pull rod, a first spring is provided in the circular groove to contract the first push-pull rod and the second push-pull rod to the limit, one end of the first spring is connected to the first push-pull rod on the first push-pull rod. A compression spring ring is connected, the other end of the first spring is connected to the inner wall of the circular groove, a first ring sleeve is axially sliding in the injection cartridge, the first ring sleeve is provided with a scale indicating the amount of medicine in the injection cartridge, a transparent window is provided on the wall of the injection cartridge, and a marking line indicating the scale on the first ring sleeve is provided in the middle of the transparent window, a second ring sleeve is rotatably provided in the injection cartridge and is threadedly connected to the first ring sleeve, a rotary sleeve connected to the second ring sleeve is provided on the outside of the injection cartridge, and anti-slip grooves are provided on the outer cylindrical surface of the rotary sleeve, the end of the second push-pull rod is hinged to a connecting rod, the end of the connecting rod is hinged to a first handle, the first handle is hinged to a second handle provided on the injection cartridge, and a vortex spring is connected between the first handle and the second handle.

4. A multi-barrel syringe for veterinary use according to claim 3, characterized in that: The single-tube container assembly consists of a first container and a first sealing film at the mouth of the first container. The first container is threadedly engaged with the corresponding first mounting seat, and the first container is engaged with a first sealing gasket provided in the first mounting seat.

5. The multi-barrel syringe for veterinary use according to claim 3, characterized in that: The double-tube container assembly includes a U-shaped tube, and second mounting seats are provided at both ends of the U-shaped tube. A second plug connected to the U-shaped tube is provided in the middle of the second mounting seat. A reducer connected to the U-shaped tube and a third ring sleeve threadedly connected to the corresponding first mounting seat are provided in the middle of the U-shaped tube. A second sealing gasket and a first sealing gasket are respectively matched between the reducer and the third ring sleeve and the corresponding first mounting seat. A second container is threadedly mounted on the second mounting seat, and a third sealing gasket is matched between the second container and the second mounting seat. A second sealing film is provided at the mouth of the second container, and two second pistons synchronously connected by a U rod are slidably provided in the two second containers corresponding to the U-shaped tube.

6. The multi-barrel syringe for veterinary use according to claim 3, characterized in that: The first one-way valve assembly includes a first shell arranged on the pipette, a first guide sleeve is arranged in the first shell through a first fixed rod, a first guide rod is slidably arranged in the first guide sleeve, a first valve plug for switching the pipette is arranged at the end of the first guide rod, and a second spring is connected between the first valve plug and the first guide sleeve.

7. The multi-barrel syringe for veterinary use according to claim 1, characterized in that: The pressure liquid component includes an elastic bag, and a first liquid inlet pipe and a liquid outlet pipe are respectively provided at both ends of the elastic bag. The first liquid inlet pipe is connected to the first injection nozzles of the two injection cartridges through a Y-shaped first hose. The first hose is plugged into the first injection nozzle and is threadedly connected to the first liquid inlet pipe. The liquid outlet pipe is connected to the second liquid inlet pipe through a second hose. The two ends of the second hose are respectively threadedly connected to the liquid outlet pipe and the second liquid inlet pipe. A second one-way valve assembly is provided on the first liquid inlet pipe, and a third one-way valve assembly is provided on the liquid outlet pipe.

8. The multi-barrel syringe for veterinary use according to claim 7, characterized in that: The structure of the second one-way valve assembly is the same as that of the third one-way valve assembly. The second one-way valve assembly includes a second shell, which is arranged in the first liquid inlet pipe or the liquid outlet pipe. A second guide sleeve is arranged in the second shell through a second fixed rod. A second guide rod is slidably arranged in the second guide sleeve. A second valve plug for switching the first liquid inlet pipe or the liquid outlet pipe is provided at the end of the second guide rod. A third spring is connected between the second valve plug and the second guide sleeve.

9. The multi-barrel syringe for veterinary use according to claim 8, characterized in that: Two limiting rods for limiting the opening range of the corresponding second valve plugs are arranged in the second housing of the third one-way valve assembly.

Images