Veterinary syringe one-way valve core

Abstract

The one-way valve element comprises a valve body, a valve needle, a spring and a plug, a first through hole penetrating front and back is formed in the valve body, a second through hole penetrating front and back is formed in the plug, the valve needle is placed in the rear end of the valve body and used for opening or blocking the first through hole, and the plug is detachably connected to the front end of the valve body. The spring is contained in the valve body and clamped between the plug and the valve needle in a front-back extending mode. The one-way valve core is simple in structure and convenient to disassemble and assemble; the one-way valve core is convenient to disinfect because of being convenient to disassemble and assemble; due to the fact that disassembly and assembly are convenient, when the one-way valve element is blocked, inspection and replacement are convenient, disassembly and cleaning are convenient, and the one-way valve element can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of veterinary syringes, in particular to a one-way valve core of a veterinary syringe. Background Art

[0002] Veterinary syringes are the main instruments for vaccinating poultry and large livestock or injecting other drugs. Generally, veterinary syringes are single-headed. It is necessary to use a push rod to pull the piston back, use negative pressure to absorb the drug, and then drag the push rod to inject the drug into the livestock. This method is a relatively early syringe. Up to now, continuous syringes have appeared one after another, that is, using the one-way characteristics to achieve a non-interference method for the position of the liquid drawing port and the injection port to achieve continuous injection. For example, a veterinary bottle-type continuous syringe published in Chinese patent document patent number 202223539593.8 uses this method. Although syringes with this structure achieve continuous injection, they have the following problems:

[0003] 1. The one-way structure assembly of the liquid drawing port and the injection port is complicated;

[0004] 2. The one-way structure at the liquid drawing port and injection port is difficult to disinfect;

[0005] 3. Once the one-way structure at the liquid drawing port and injection port is blocked, it is difficult to check and replace.

[0006] Therefore, it is necessary to focus on the above problems and develop a syringe one-way valve core that can solve such problems. Utility Model Content

[0007] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a one-way valve core of a veterinary syringe.

[0008] The technical solution of the utility model is: a one-way valve core for a veterinary syringe, including a valve body, a valve needle, a spring and a plug, the valve body having a first through hole extending front to back, the plug having a second through hole extending front to back, the valve needle being placed in the rear end of the valve body and used to open or block the first through hole, the plug being detachably connected to the front end of the valve body, the spring being accommodated in the valve body and extending front to back and being stuck between the plug and the valve needle.

[0009] Furthermore, an arc-shaped groove is provided on the inner wall at the rear end of the first through hole, and an annular flange is provided in the middle of the valve needle, and the outer wall of the flange contacts the inner wall of the arc-shaped groove, so that the first through hole is blocked.

[0010] Furthermore, when the valve needle moves forward, the flange of the valve needle is separated from the inner wall of the arc-shaped groove, and the first through hole is opened.

[0011] Furthermore, an outer wall of the plug is provided with an external thread, and an internal thread hole is provided in the front end of the valve body, and the plug is screwed into the internal thread hole.

[0012] Furthermore, the valve body is cylindrical, and a plurality of rings are protrudingly provided on the outer wall thereof.

[0013] Furthermore, the one-way valve core of the veterinary syringe is placed at the liquid drawing port and the injection port of the veterinary syringe, and the circular ring of the valve body fits with the inner walls of the liquid drawing port and the injection port.

[0014] The beneficial effects of applying the one-way valve core of the veterinary syringe provided by the utility model are as follows: the one-way valve core has a simple structure and is easy to disassemble and assemble; because it is easy to disassemble and assemble, it is convenient to disinfect the one-way valve core; because it is easy to disassemble and assemble, when the one-way valve core is blocked, it is also convenient to check and replace, and it is convenient to disassemble and clean, and can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 It is a cross-sectional schematic diagram after decomposition of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the structure after being installed on a veterinary syringe.

[0019] As shown in the figure: 1-valve body, 11-first through hole, 111-arc groove, 12-inner thread hole, 13-plum blossom groove, 14-ring, 2-valve needle, 21-flange, 3-spring, 4-plug, 41-second through hole, 42-external thread, 5-veterinary syringe, 51-liquid drawing port, 52-injection port, 53-head cap, 54-liquid drawing cap. DETAILED DESCRIPTION

[0020] In order to more intuitively and completely understand the technical solution of the utility model, the following non-limiting feature description is now provided in conjunction with the accompanying drawings of the utility model:

[0021] like Figure 1 — Figure 4 As shown, the one-way valve core of the veterinary syringe includes a valve body 1, a valve needle 2, a spring 3 and a plug 4. The valve body 1 has a first through hole 11 extending forward and backward, the plug 4 has a second through hole 41 extending forward and backward, the valve needle 2 is placed in the rear end of the valve body 1 and is used to open or block the first through hole 11, the plug 4 is detachably connected to the front end of the valve body 1, and the spring 3 is accommodated in the valve body 1 and extends forward and backward to be stuck between the plug 4 and the valve needle 2.

[0022] like Figure 2 and Figure 3As shown, the inner wall of the rear end of the first through hole 11 has an arc groove 111, and the middle part of the valve needle 2 has an annular flange 21, and the outer wall of the flange 21 contacts the inner wall of the arc groove 111, so that the first through hole 11 is blocked. When the valve needle 2 moves forward, the flange 21 of the valve needle 2 separates from the inner wall of the arc groove 111, and the first through hole 11 is opened. When working, the liquid will push the valve needle 2 to move forward, and the spring 3 will be compressed. When not working, the valve needle 2 blocks the first through hole 11 by the elastic force of the spring 3.

[0023] like Figure 2 and Figure 3 As shown, in order to facilitate the disassembly and assembly of the plug 4, the outer wall of the plug 4 has an external thread 42, the front end of the valve body 1 has an internal thread hole 12, and the plug 4 is screwed into the internal thread hole 12. The front end of the plug 4 is provided with a hexagonal groove 13, and the plug 4 can be unscrewed with a screwdriver.

[0024] like Figure 1 As shown, the valve body 1 is cylindrical, and a plurality of rings are convexly provided on its outer wall. Figure 4 As shown, the one-way valve core of the veterinary syringe is placed in the liquid drawing port 51 and the injection port 52 of the veterinary syringe 5, and the ring of the valve body 1 fits with the inner wall of the liquid drawing port 51 and the injection port 52, and there is no need to install a sealing ring, which is more convenient to install. The front end of the veterinary syringe 5 is installed with a head cap 53 and a liquid drawing cap 54 by threaded connection. The head cap 53 is used to block the one-way valve core in the injection port 52, and the liquid drawing cap 54 is used to block the one-way valve core in the liquid drawing port 51. After unscrewing the head cap 53 and the liquid drawing cap 54, the one-way valve core can be removed.

[0025] The one-way valve core of the veterinary syringe provided by the utility model has a simple one-way valve core structure and is easy to disassemble and assemble. Because of the easy disassembly and assembling, it is convenient to disinfect the one-way valve core. Because of the easy disassembly and assembling, when the one-way valve core is blocked, it is also convenient to check and replace, and it is convenient to disassemble and clean, and can be reused.

[0026] Of course, the above are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All simple modifications and equivalent structural changes made using the description and drawings of the present invention should be included in the patent protection scope of the present invention.

Claims

1. One-way valve core for veterinary syringe, characterized by: It includes a valve body, a valve needle, a spring and a plug. The valve body has a first through hole that runs through the front and back, the plug has a second through hole that runs through the front and back, the valve needle is placed in the rear end of the valve body and is used to open or block the first through hole, the plug is detachably connected to the front end of the valve body, the spring is accommodated in the valve body and extends front and back and is stuck between the plug and the valve needle.

2. The one-way valve core of the veterinary syringe according to claim 1, characterized in that: An arc-shaped groove is provided on the inner wall at the rear end of the first through hole, and an annular flange is provided in the middle of the valve needle. The outer wall of the flange contacts the inner wall of the arc-shaped groove, so that the first through hole is blocked.

3. The one-way valve core of the veterinary syringe according to claim 2, characterized in that: When the valve needle moves forward, the flange of the valve needle is separated from the inner wall of the arc-shaped groove, and the first through hole is opened.

4. The one-way valve core of the veterinary syringe according to claim 1, characterized in that: The outer wall of the plug is provided with an external thread, the front end of the valve body is provided with an internal thread hole, and the plug is screwed into the internal thread hole.

5. The one-way valve core of the veterinary syringe according to claim 1, characterized in that: The valve body is cylindrical, and a plurality of rings are convexly arranged on the outer wall thereof.

6. The one-way valve core of the veterinary syringe according to claim 1, characterized in that: The one-way valve core of the veterinary syringe is placed at the liquid drawing port and the injection port of the veterinary syringe, and the circular ring of the valve body fits with the inner wall of the liquid drawing port and the injection port.

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