A veterinary dual-barrel injection gun

Abstract

This utility model belongs to the technical field of veterinary injection guns, specifically relating to a veterinary double-barreled injection gun. A veterinary double-barreled injection gun includes an injection handle, a handle through-hole, a piston body cylinder at the front end of the handle through-hole, and a threaded connection between the piston body cylinder and the handle through-hole; an adjusting screw sleeve at the rear end of the handle through-hole, and a threaded connection between the adjusting screw sleeve and the rear end of the handle through-hole.

Description

Technical Field

[0001] This utility model belongs to the technical field of veterinary injection guns, specifically relating to a veterinary double-barreled injection gun. Background Technology

[0002] A veterinary dual-barrel injection gun (or twin injection gun) is a device specifically designed for livestock farming, used to simultaneously inject two different medications or vaccines. Its structure includes two independent cartridges, each capable of holding different medications (such as vaccines and diluents, antibiotics and anti-inflammatory drugs).

[0003] Existing dual-tube injection guns have two independent drug cartridges, each containing a piston rod that ejects the drug from the cartridge, as described in CN200320116649.7. When the drugs in the two cartridges need to be mixed in a fixed ratio, the aforementioned dual-tube injection gun cannot simultaneously draw in the same proportion of drug as required.

[0004] In order to solve the above problems, this utility model aims to provide a veterinary dual-barrel injection gun. Utility Model Content

[0005] The purpose of this invention is to provide a veterinary dual-barrel injection gun to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A veterinary dual-barrel injection gun includes an injection handle, a handle through hole, a piston body cylinder at the front end of the handle through hole, and a threaded connection between the piston body cylinder and the handle through hole; and an adjusting screw sleeve at the rear end of the handle through hole, which is also threadedly connected to the rear end of the handle through hole. The piston body has two liquid piston cylinders at its front end, each with graduated lines on its wall. Each of the two liquid piston cylinders has a three-way injection nozzle at its front. Inside the piston body is a main push rod that passes through a handle hole. A connecting block is located at the front end of the main push rod, and piston rod one and piston rod two are located at the front end of the connecting block. Piston rod one and piston rod two respectively pass into the two liquid piston cylinders. Piston rod one has a telescopic piston head at its head, and piston rod two has a fixed piston head at its head. The telescopic piston head includes a movable... The piston head comprises a piston head 1, a telescopic spring, and a sealing rubber ring 1. The piston head 1 is located inside the piston rod 1, and the piston head 1 and the piston rod 1 are telescopically connected. The telescopic spring is located inside the piston rod 1, and its two ends respectively abut against the rear end of the piston head 1 and the bottom of the inner wall of the piston rod 1. The sealing rubber ring 1 is located on the outer wall of the piston head 1. The fixed piston head comprises a piston head 2 and a sealing rubber ring 2. The piston head 2 is fixedly located at the front end of the piston rod 2, and the sealing rubber ring 2 is located on the outer wall of the piston head 2. The adjusting screw sleeve and the handle through hole are rotatably adjustable; the main push rod passes through the adjusting screw sleeve, and a return spring is fitted at the rear section of the main push rod; the front half of the return spring is inserted into the adjusting screw sleeve, and a limiting ring is provided at the front end of the inner wall of the adjusting screw sleeve, with the front head of the return spring abutting against the limiting ring; a protective sleeve is provided at the rear half of the return spring, and a limiting ring is provided at the rear end of the inner wall of the protective sleeve, with the rear tail of the return spring abutting against the limiting ring; the rear tail of the main push rod extends out of the protective sleeve, and a grip is provided at the rear tail of the main push rod, with the grip being threadedly connected to the main push rod.

[0007] Preferably, the piston body cylinder has an external thread on its outer wall and an internal thread at the front end of the handle through hole. The piston body cylinder and the handle through hole are connected by the external thread and the internal thread. The piston body cylinder has a locking ring on its outer wall, which is connected to the piston body cylinder by the external thread. The position of the locking ring on the outer wall of the piston body cylinder can be adjusted by rotating the locking ring.

[0008] Preferably, the outer wall of the adjusting screw sleeve is provided with a second external thread, and the rear end of the handle through hole is provided with a second internal thread. The adjusting screw sleeve and the handle through hole are connected by the second external thread and the second internal thread. The outer wall of the adjusting screw sleeve is provided with a second locking ring, which is connected to the adjusting screw sleeve by the second external thread. By rotating the second locking ring, the position of the second locking ring on the outer wall of the adjusting screw sleeve can be adjusted.

[0009] Preferably, the three-way injection nozzle includes a front nozzle, a rear connector, and a bottom inlet nozzle. The front nozzle is equipped with a one-way valve, and the bottom inlet nozzle is equipped with a two-way valve.

[0010] Preferably, a fixed connecting member is provided between the two liquid piston cylinders.

[0011] Preferably, both liquid piston cylinders are provided with reinforcing ribs on their outer sides.

[0012] Preferably, the front ends of the two three-way injection nozzles are provided with a fixing connector.

[0013] Preferably, in the natural state where the telescopic piston head is not under force, the scale readings corresponding to the telescopic piston head and the scale readings corresponding to the fixed piston head are fixed values.

[0014] Compared with the prior art, the beneficial effects of this utility model are: (1) The present invention provides a veterinary double-barrel injection gun. Under the action of the return spring, the main push rod begins to move backward to reset. When the main push rod is reset, it drives piston rod one and piston rod two to move backward at the same time. During the movement, piston rod one and piston rod two complete the liquid aspiration operation. Since piston rod one is equipped with a telescopic spring inside, it will be fully extended during the backward movement. When the telescopic piston head is fully extended, the overall length of piston rod one is longer than that of piston rod two. Therefore, piston rod one aspirates less liquid and piston rod two aspirates more liquid. The liquid aspirated by the two can form a fixed volume difference and form a fixed liquid ratio. (2) The present invention provides a veterinary double-barrel injection gun, wherein two liquid piston cylinders are respectively provided with piston rod one and piston rod two. The head of piston rod one is a telescopic piston head, and the head of piston rod two is a fixed piston head. When the main push rod is pushed forward, piston rod one and piston rod two respectively push out the liquid medicine in the two liquid piston cylinders. Since the head of piston rod one is a telescopic piston head, when the telescopic piston head of piston rod one reaches the front end of the liquid piston cylinder, the main push rod continues to push forward, and piston rod one retracts until the fixed piston head of piston rod two reaches the front end of the liquid piston cylinder. At this time, the liquid medicine in the two liquid piston cylinders is completely pushed out. Through the above operation, a fixed proportion of liquid medicine can be output. (3) The present invention provides a veterinary double-barrel injection gun with an adjusting screw sleeve at the rear end of the handle through hole. The front and rear positions of the main push rod can be adjusted by adjusting the adjusting screw sleeve, thereby realizing the adjustment of the scale position of the telescopic piston head and the fixed piston head, and realizing the adjustment of the drug inhalation volume. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the present invention. Figure 1 ; Figure 3 This is a schematic cross-sectional view of the piston body cylinder and liquid piston cylinder of this utility model. Figure 1 ; Figure 4 This is a schematic cross-sectional view of the piston body cylinder and liquid piston cylinder of this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the mating structure of the liquid piston cylinder, the three-way injection nozzle, piston rod one, piston rod two, etc. of this utility model. In the diagram: 1. Injection handle; 2. Handle perforation; 3. Piston body cylinder; 4. Connecting external thread 1; 5. Connecting internal thread 1; 6. Locking ring 1; 7. Adjusting screw sleeve; 8. Connecting external thread 2; 9. Connecting internal thread 2; 10. Locking ring 2; 11. Liquid piston cylinder; 12. Main push rod; 13. Connecting block; 14. Piston rod 1; 15. Piston rod 2; 16. Telescopic piston head; 17. Piston head 1; 18. Telescopic spring; 19. Sealing rubber ring 1; 20. Piston rod limiting ring; 21. Fixed piston head; 22. Piston head 2; 23. Sealing rubber ring 2; 24. Scale line; 25. Three-way injection nozzle; 26. Front nozzle; 27. Rear connector; 28. Bottom inlet head; 29. ​​One-way valve 1; 30. One-way valve 2; 31. Fixed connector 1; 32. Reinforcing rib; 33. Fixed connector 2; 34. Return spring; 35. Limiting ring 1; 36. Protective sleeve rod; 37. Limiting ring 2; 38. Grip handle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] A veterinary double-barreled injection gun includes an injection handle 1, and the injection handle 1 has a handle through hole 2.

[0018] A piston body cylinder 3 is located at the front end of the handle through hole 2. The outer wall of the piston body cylinder 3 has an external thread 4, and the front end of the handle through hole 2 has an internal thread 5. The piston body cylinder 3 and the handle through hole 2 are connected via the external thread 4 and the internal thread 5. To lock and fix the piston body cylinder 3 and the handle through hole 2, a locking ring 6 is located on the outer wall of the piston body cylinder 3. The locking ring 6 is connected to the piston body cylinder 3 via the external thread 4. After the piston body cylinder 3 is screwed into the handle through hole 2, rotating the locking ring 6 adjusts its position on the outer wall of the piston body cylinder 3, bringing it closer to the injection handle 1 until the locking ring 6 clamps the injection handle 1. The locking ring 6 clamping the injection handle 1 effectively prevents relative rotation between the piston body cylinder 3 and the injection handle 1.

[0019] An adjusting screw sleeve 7 is provided at the rear end of the handle through hole 2. An external thread 8 is provided on the outer wall of the adjusting screw sleeve 7, and an internal thread 9 is provided at the rear end of the handle through hole 2. The adjusting screw sleeve 7 and the handle through hole 2 are connected through the external thread 8 and the internal thread 9. Rotating the adjusting screw sleeve 7 adjusts the depth to which it is screwed into the handle through hole 2. A locking ring 10 is provided on the outer wall of the adjusting screw sleeve 7, and is connected to the adjusting screw sleeve 7 through the external thread 8. Rotating the locking ring 10 adjusts its position on the outer wall of the adjusting screw sleeve 7. The locking ring 10 is used to lock the adjusting screw sleeve 7. Rotating the locking ring 10 brings it closer to the handle through hole 2 until it locks the injection handle 1. The locking ring 10 effectively prevents relative rotation between the adjusting screw sleeve 7 and the injection handle 1.

[0020] Two liquid piston cylinders 11 are provided at the front end of the piston main body cylinder 3. A main push rod 12 is provided inside the piston main body cylinder 3, passing through the handle through hole 2. A connecting block 13 is provided at the front end of the main push rod 12, and piston rod one 14 and piston rod two 15 are provided at the front end of the connecting block 13. Piston rod one 14 and piston rod two 15 respectively pass through the two liquid piston cylinders 11. The rear end of the main push rod 12 passes through the adjusting screw sleeve 7.

[0021] The piston rod 14 has a telescopic piston head 16 at its head. The telescopic piston head 16 includes a piston head 17, a telescopic spring 18, and a sealing rubber ring 19. The piston rod 14 has a hollow interior, and the piston head 17 and piston rod 14 are nested together, allowing for telescopic movement. To prevent the piston head 17 from detaching from the front end of the piston rod 14, a piston head limiting ring 19 is provided at the rear end of the outer wall of the piston head 17, and a piston rod limiting ring 20 is provided at the front end of the inner wall of the piston rod 14. The telescopic spring 18 is located inside the piston rod 14, with its two ends abutting against the rear end of the piston head 17 and the rear end of the inner wall of the piston rod 14, respectively. Pressing the piston head 17 retracts it; releasing the pressure causes it to extend forward. A sealing rubber ring 19 is disposed on the outer wall of piston head 17. When piston rod 14 is inserted into the corresponding liquid piston cylinder 11, sealing rubber ring 19 can clamp the inner wall of the liquid piston cylinder 11 to prevent leakage during the pushing and pulling process. The head of piston rod 15 is a fixed piston head 21. The fixed piston head 21 includes piston head 22 and sealing rubber ring 23. Piston head 22 is fixedly disposed at the front end of piston rod 15, and sealing rubber ring 23 is disposed on the outer wall of piston head 22. When piston rod 15 is inserted into the corresponding liquid piston cylinder 11, sealing rubber ring 23 can clamp the inner wall of the liquid piston cylinder 11 to prevent leakage during the pushing and pulling process. To display the scale position of piston head 17 and piston head 22, scale lines 24 are provided on the cylinder walls of the two liquid piston cylinders 11. Both liquid piston cylinders 11 are equipped with three-way injection nozzles 25 at their front ends. Each three-way injection nozzle 25 includes a front nozzle 26, a rear connector 27, and a bottom inlet nozzle 28. The rear connector 27 is fixedly connected to the front end of the liquid piston cylinder 11. A one-way valve 29 is located inside the front nozzle 26, enabling one-way injection and preventing backflow. A second one-way valve 30 is located inside the bottom inlet nozzle 28, also enabling one-way injection and preventing backflow. To enhance the structural strength of the liquid piston cylinders 11 and the three-way injection nozzles 25, a fixed connector 31 is provided between the two liquid piston cylinders 11, reinforcing ribs 32 are provided on the outer sides of both liquid piston cylinders 11, and a fixed connector 33 is provided at the front end of each of the two three-way injection nozzles 25.

[0022] The rear end of the main push rod 12 passes through the adjusting screw sleeve 7. A return spring 34 is fitted onto the rear section of the main push rod 12, with the front half of the return spring 34 penetrating the interior of the adjusting screw sleeve 7. A limiting ring 35 is provided at the front end of the inner wall of the adjusting screw sleeve 7, and the front head of the return spring 34 abuts against the limiting ring 35. A protective sleeve rod 36 is provided at the rear half of the return spring 34, and the protective sleeve rod 36 covers the rear half of the return spring 34. A limiting ring 37 is provided at the rear end of the inner wall of the protective sleeve rod 36, and the rear tail of the return spring 34 abuts against the limiting ring 37. The rear tail of the main push rod 12 extends out of the protective sleeve rod 36, and a grip 38 is provided at the rear tail of the main push rod 12. The grip 38 is threadedly connected to the main push rod 12. The two ends of the return spring 34 abut against the first limiting ring 35 and the second limiting ring 37 respectively, pushing the grip 38 forward, causing the main push rod 12 to move forward as a whole. Correspondingly, the first piston head 17 and the second piston head 22 move forward. When the force applied to the grip 39 is removed, the grip 38 rebounds, and the main push rod 12 moves backward as a whole.

[0023] When no force is applied to the handle 38, the telescopic piston head 16 is in its naturally extended state, at which point both the telescopic piston head 16 and the fixed piston head 21 are aligned with their respective scale readings. The scale aligned with the telescopic piston head 16 is 0.5 ml, and the scale aligned with the fixed piston head 21 is 0.3 ml, with a difference of 0.2 ml between the two. To adjust the volume of the medicine dispensed, rotating the adjusting screw sleeve 7 moves the main push rod 12 forward or backward. During the movement of the main push rod 12, the telescopic piston head 16 and the fixed piston head 21 can be moved forward or backward to adjust the liquid aspiration volume. When rotating the adjusting screw sleeve 7, the difference between the scale readings of the telescopic piston head 16 and the fixed piston head 21 remains at 0.2 ml. To achieve other drug ratios, the main push rod assembly can be replaced. The main push rod assembly includes the main push rod 12, connecting block 13, piston rod one 14, and piston rod two 15. The purpose of replacing the main push rod assembly is to adjust the length of the telescopic piston head 16 in its naturally extended state, so as to adjust the scale difference between the telescopic piston head 16 and the fixed piston head 21.

[0024] When drawing up the liquid, the two liquid piston cylinders 11 have different suction capacities because the fixed piston head 21 and the telescopic piston head 16 have different graduations. The suction capacity of the telescopic piston head 16 is 0.2 ml smaller than that of the fixed piston head 21. When the operator pushes the main push rod 12 forward, the telescopic piston head 16 and the fixed piston head 21 move forward synchronously, fully expelling the gas or liquid from the two liquid piston cylinders 11. When the telescopic piston head 16 reaches the front end of the liquid piston cylinder 11, it begins to retract, allowing the fixed piston head 21 to continue moving forward until both the fixed piston head 21 and the telescopic piston head 16 simultaneously press against the front end of their respective liquid piston cylinders 11. When the operator removes the force applied to the main push rod 12, the main push rod 12 rebounds under the action of the return spring 34, and the telescopic piston head 16 and the fixed piston head 21 retract synchronously. During the retraction process, the telescopic piston head 16 gradually unfolds. After the telescopic piston head 16 is fully unfolded, there is a scale difference between the telescopic piston head 16 and the fixed piston head 21, which is the difference in liquid absorption capacity.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A veterinary dual-barrel injection gun, characterized in that: The device includes an injection handle, which has a handle through hole. A piston body cylinder is provided at the front end of the handle through hole, and the piston body cylinder and the handle through hole are connected by a thread. An adjusting screw sleeve is provided at the rear end of the handle through hole, and the adjusting screw sleeve and the rear end of the handle through hole are connected by a thread. The piston body has two liquid piston cylinders at its front end, each with graduated lines on its wall. Each of the two liquid piston cylinders has a three-way injection nozzle at its front. Inside the piston body is a main push rod that passes through a handle hole. A connecting block is located at the front end of the main push rod, and piston rod one and piston rod two are located at the front end of the connecting block. Piston rod one and piston rod two respectively pass into the two liquid piston cylinders. Piston rod one has a telescopic piston head at its head, and piston rod two has a fixed piston head at its head. The telescopic piston head includes a movable... The piston head comprises a piston head 1, a telescopic spring, and a sealing rubber ring 1. The piston head 1 is located inside the piston rod 1, and the piston head 1 and the piston rod 1 are telescopically connected. The telescopic spring is located inside the piston rod 1, and its two ends respectively abut against the rear end of the piston head 1 and the bottom of the inner wall of the piston rod 1. The sealing rubber ring 1 is located on the outer wall of the piston head 1. The fixed piston head comprises a piston head 2 and a sealing rubber ring 2. The piston head 2 is fixedly located at the front end of the piston rod 2, and the sealing rubber ring 2 is located on the outer wall of the piston head 2. The adjusting screw sleeve and the handle through hole are rotatably adjustable; the main push rod passes through the adjusting screw sleeve, and a return spring is fitted at the rear section of the main push rod; the front half of the return spring is inserted into the adjusting screw sleeve, and a limiting ring is provided at the front end of the inner wall of the adjusting screw sleeve, with the front head of the return spring abutting against the limiting ring; a protective sleeve is provided at the rear half of the return spring, and a limiting ring is provided at the rear end of the inner wall of the protective sleeve, with the rear tail of the return spring abutting against the limiting ring; the rear tail of the main push rod extends out of the protective sleeve, and a grip is provided at the rear tail of the main push rod, with the grip being threadedly connected to the main push rod.

2. The veterinary dual-barrel injection gun according to claim 1, characterized in that: The piston body cylinder has an external thread on its outer wall and an internal thread at the front end of the handle through hole. The piston body cylinder and the handle through hole are connected by the external thread and the internal thread. The piston body cylinder has a locking ring on its outer wall and is connected to the piston body cylinder by the external thread. The position of the locking ring on the outer wall of the piston body cylinder can be adjusted by rotating the locking ring.

3. The veterinary dual-barrel injection gun according to claim 1, characterized in that: The outer wall of the adjusting screw sleeve is provided with a second external thread, and the rear end of the handle through hole is provided with a second internal thread. The adjusting screw sleeve and the handle through hole are connected by the second external thread and the second internal thread. The outer wall of the adjusting screw sleeve is provided with a second locking ring, which is connected to the adjusting screw sleeve by the second external thread. By rotating the second locking ring, the position of the second locking ring on the outer wall of the adjusting screw sleeve can be adjusted.

4. The veterinary dual-barrel injection gun according to claim 1, characterized in that: The three-way injection nozzle includes a front nozzle, a rear connector, and a bottom inlet nozzle. The front nozzle is equipped with a one-way valve, and the bottom inlet nozzle is equipped with a two-way valve.

5. A veterinary dual-barrel injection gun according to claim 1, characterized in that: A fixed connecting member is provided between the two liquid piston cylinders.

6. A veterinary dual-barrel injection gun according to claim 1, characterized in that: Both liquid piston cylinders are provided with reinforcing ribs on their outer sides.

7. A veterinary dual-barrel injection gun according to claim 1, characterized in that: The front ends of the two three-way injection nozzles are provided with a fixing connector.

8. A veterinary dual-barrel injection gun according to claim 1, characterized in that: When the telescopic piston head is in its natural, unforced state, the scale readings corresponding to the telescopic piston head and the scale readings corresponding to the fixed piston head are fixed values.

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