Punching injector capable of slowing down abrasion

Abstract

The utility model discloses a punching syringe capable of slowing down abrasion, which comprises a shell part, a piston part, a connecting piece and a connecting part, and is characterized in that the shell part is mounted in the connecting part; the connecting part comprises a protruding part on the side and a containing part used for installing the shell part, and the protruding part is provided with a connecting cavity with an opening; the connecting cavity is communicated with the shell part; a cushion layer is arranged at the bottom in the connecting cavity, and a through hole is formed in the cushion layer; the through hole is communicated with a cavity in the shell part; the shell part is further provided with a connecting hole, and the through hole corresponds to the connecting hole after installation. According to the utility model, the connecting hole of the shell part is arranged below the maximum stroke part of the piston part, so that the abrasion to a sealing ring in the reciprocating motion of the piston is reduced, the damage condition is reduced, and the service life is prolonged; and through the mode that the connecting part is fixed through non-glue, the leakage risk caused by glue dissolution and the like is relieved, and the problem that an external pipeline is prone to slipping is also relieved.

Description

Technical Field

[0001] This utility model relates to a syringe, and more particularly to a perforated syringe that can reduce wear. Background Technology

[0002] Injection pumps or syringes are high-precision, high-reliability liquid transfer devices used in pipetting technology, widely applied in fields such as biomedicine, chemical analysis, and molecular biology. Their core components include a precision-machined syringe (piston), pump body, drive mechanism, and sealing system. Driven by a motor or mechanical device, the piston reciprocates within the syringe's glass cavity: when the piston retracts, a negative pressure is created, drawing liquid into the cavity; when the piston advances, a positive pressure is generated, achieving precise liquid expulsion.

[0003] In the prior art, glass syringes generally have a hole drilled in the bottom to connect to an external tube. The hole is usually located above the bottom of the syringe piston. A stainless steel ring is glued to the hole in the glass tube to fix the connector and ensure a seal between the hole and the connector.

[0004] However, because the hole on the syringe will not face outwards after being screwed into the thread, it cannot fit tightly with the external connector, making it impossible to install the tubing fitting. Furthermore, since the hole is drilled above the syringe piston, and the piston's sealing ring is made of a soft material, the reciprocating motion will cause the sealing ring to be cut, worn, or even broken by the hole in the glass tube, quickly leading to leakage and rendering the syringe unusable. Additionally, if the stainless steel ring is fixed with glue, corrosive liquids or organic solvents can dissolve and corrode the glue, causing the syringe to leak.

[0005] The top of the syringe is fixed by a screw-on rotation. Therefore, when the syringe is tightened, the hole at the bottom will rotate and become unstable, resulting in the hole not facing outward. If the angle is turned inward after tightening, the connector tube cannot be installed and will interfere with the panel, rendering the syringe unusable. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a punching syringe that reduces wear and eliminates wear, thus solving the problems of easy wear and inconvenient installation in the prior art.

[0007] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0008] This utility model provides a punching syringe that can reduce wear, comprising a housing, a piston, a connector, and a connecting part, wherein,

[0009] The outer casing is installed inside the connecting portion;

[0010] The connecting portion includes a protrusion on the side and a receiving portion for mounting the outer casing portion, wherein,

[0011] The protrusion has an open connecting cavity;

[0012] The connecting cavity is in communication with the outer shell.

[0013] In a preferred embodiment of this invention, the bottom of the connecting cavity is a padding layer, wherein...

[0014] The padding layer has through holes;

[0015] The through hole communicates with the cavity inside the outer casing.

[0016] As a preferred embodiment of this invention, the outer shell is further provided with a connecting hole.

[0017] The through hole corresponds to the connecting hole after installation.

[0018] In a preferred embodiment of this invention, the end of the outer shell portion is a connecting member, wherein...

[0019] The surface of the connector is threaded.

[0020] As a preferred embodiment of this invention, a gasket may be installed at the end of the connector.

[0021] In a preferred embodiment of this invention, the piston is installed within the cavity of the outer casing.

[0022] As a preferred embodiment of this utility model, the inner surface of the connecting cavity is provided with connecting threads.

[0023] As a preferred embodiment of this invention, the connecting part is made of a polymer material.

[0024] The beneficial effects of this utility model are as follows: By installing the connecting hole of the outer shell part below the maximum stroke of the piston part, this utility model reduces the wear of the sealing ring caused by the reciprocating motion of the piston, slows down the damage, and improves the service life; by fixing the connection part without glue, it avoids the risk of leakage caused by glue dissolution, and also avoids the problem of easy stripping of external pipelines. Attached Figure Description

[0025] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0026] Figure 2 This is one of the structural schematic diagrams of this utility model;

[0027] Figure 3This is one of the structural schematic diagrams of this utility model;

[0028] Figure 4 This is one of the structural schematic diagrams of this utility model;

[0029] Figure 5 This is one of the structural schematic diagrams of this utility model;

[0030] In the figure: 100, outer shell; 101, cavity; 102, connecting hole; 200, piston; 300, connector; 301, thread; 302, gasket; 400, connecting part; 401, protrusion; 402, receiving part; 403, connecting cavity; 404, pad; 405, through hole. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] Example

[0033] like Figure 1-5 As shown, this embodiment provides a punching syringe that can reduce wear, including a housing 100, a piston 200, a connector 300, and a connecting part 400, wherein the housing 100 is installed inside the connecting part 400; the connecting part 400 is made of a polymer material.

[0034] The connecting portion 400 includes a side protrusion 401 and a receiving portion 402 for mounting the housing portion 100, wherein the protrusion 401 has an open connecting cavity 403; the connecting cavity 403 communicates with the housing portion 100.

[0035] Specifically, the bottom of the connecting cavity 403 is a pad 404, wherein the pad 404 has a through hole 405; the through hole 405 communicates with the cavity 101 inside the outer shell 100. The outer shell 100 is also provided with a connecting hole 102, and the through hole 405 corresponds to the connecting hole 102 after installation, so that when an external pipeline is connected through the connecting cavity 401 of the connecting part 400, fluid enters the cavity 101; in this embodiment, the connecting part 400 is made of the following materials: Teflon PTFE, PEEK, PPS, POM, ultra-high molecular weight polyethylene and other engineering plastics.

[0036] Regarding the 404 pad, when installing external tubing, the 404 pad will form a filler between the connector and the outer casing 100. As it is a polymer material, when the connector is tightened, it will firmly hold the fitting at the injection hole like a set screw, without the need for additional glue for fixation.

[0037] The end of the outer casing 100 is a connector 300, wherein the surface of the connector 300 is threaded 301, and a gasket 302 can be installed at the end of the connector 300. The piston 200 is installed inside the cavity 101 of the outer casing 100. Specifically, because the gasket is soft, the direction of the alignment hole is adjusted by squeezing the gasket when tightening the syringe, so that the connector 400 faces outward.

[0038] The inner surface of the connecting cavity 403 is provided with connecting threads, which can be used to install and fix the external pipeline when it is connected.

[0039] Specifically, the connection hole 102 is positioned slightly lower than that of a conventional punch injector. In a conventional punch injector, the hole is located above the position of the piston seal ring after its maximum stroke. However, each piston movement damages the seal ring, causing leakage. One preferred value is that when the piston moves 6 cm relative to its effective stroke, the connection hole 102 is located between the second and third sealing layers of the piston.

[0040] This invention reduces wear on the sealing ring during piston reciprocating motion by installing the connecting hole 102 of the outer shell 100 below the piston at its maximum stroke, thus mitigating damage and increasing service life. Furthermore, by using a non-adhesive-fixed connection method, it avoids the risk of leakage due to adhesive dissolution and also prevents the external pipeline from easily stripping.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A perforated syringe that reduces wear, characterized in that, It includes a housing (100), a piston (200), a connector (300), and a connecting part (400), wherein, The outer casing (100) is installed inside the connecting portion (400); The connecting portion (400) includes a side protrusion (401) and a receiving portion (402) for mounting the outer casing portion (100), wherein, The protrusion (401) has an open connecting cavity (403). The connecting cavity (403) is in communication with the outer shell (100).

2. The wear-reducing punching syringe according to claim 1, characterized in that, The bottom of the connecting cavity (403) is a padding layer (404), wherein, The pad (404) has through holes (405); The through hole (405) communicates with the cavity (101) inside the outer shell (100).

3. A perforating syringe with wear-reducing properties according to claim 2, characterized in that, The outer casing (100) is also provided with a connection hole (102). The through hole (405) corresponds to the connecting hole (102) after installation.

4. A perforating syringe with wear-reducing properties according to claim 1, characterized in that, The end of the outer casing (100) is a connector (300), wherein, The surface of the connector (300) is threaded (301).

5. A perforating syringe with wear-reducing properties according to claim 4, characterized in that, A gasket (302) may be installed at the end of the connector (300).

6. A perforating syringe with wear-reducing properties according to claim 1, characterized in that, The piston portion (200) is installed inside the cavity (101) of the outer casing portion (100).

7. A perforating syringe with wear-reducing properties according to claim 3, characterized in that, The inner surface of the connecting cavity (403) is provided with connecting threads.

8. A perforating syringe with wear-reducing properties according to claim 1, characterized in that, The connecting part (400) is made of polymer material.

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