High-pressure injection pump needle tube connecting structure

Abstract

The utility model provides a high pressure injection pump needle tube connecting structure relates to high pressure injection pump needle tube connecting auxiliary device technical field, aims at solving the needle tube connecting structure in the existing high pressure injection pump, the poor stability of needle tube port and injection pump interface connection, the problem of influencing high pressure injection pump operation effect, including the left end of needle tube is tapered, the right end swing joint of needle tube has the interface seat, the left end of needle tube is installed and injects the mouth, the outer wall of needle tube is fixedly connected with ring plate, the outer wall of the right end of needle tube is evenly provided with the lug, the interface seat is provided with the clamping groove, the appearance of clamping groove and the appearance of lug are in accord with.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for connecting needle tubes of high-pressure injection pumps, and in particular to a connection structure for needle tubes of high-pressure injection pumps. Background Technology

[0002] A high-pressure infusion pump is a medical device used to deliver drugs, contrast agents, and other highly precise liquids. By controlling the flow rate and pressure of the liquid, it accurately injects drugs or contrast agents into the patient's body. It is widely used in hospitals, clinics, and other medical settings, especially in contrast agent injections, drug infusions, automated infusions, nutritional support, and hemodialysis treatments.

[0003] The existing needle connection structure in high-pressure injection pumps suffers from poor stability in the connection between the needle port and the injection pump interface, which affects the operation of the high-pressure injection pump. Therefore, it is of great importance to design a needle connection structure for high-pressure injection pumps to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor connection stability between the needle port and the injection pump interface in existing high-pressure injection pumps, which affects the operation of the high-pressure injection pump. Therefore, this invention proposes a needle connection structure for high-pressure injection pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-pressure injection pump needle tube connection structure, comprising a tapered left end of the needle tube, an interface seat movably connected to the right end of the needle tube, an injection port installed at the left end of the needle tube, a ring plate fixedly connected to the outer wall of the needle tube, protrusions evenly distributed on the outer wall of the right end of the needle tube, and a slot provided on the interface seat, the shape of the slot matching the shape of the protrusions.

[0006] Preferably, the inner wall of the interface seat is further provided with partitions, which are staggered with the slot.

[0007] Preferably, a slidable push rod is installed in the interface seat, and a slidable piston is provided in the needle tube.

[0008] Preferably, the piston has symmetrically distributed limiting plates at its end, the limiting plates have an L-shaped cross-section, and the end of the push rod is fixedly connected to an auxiliary plate.

[0009] Preferably, the cross-section of the auxiliary plate is an elliptical structure, and the space formed between adjacent limiting plates is mutually engaged and limited by the auxiliary plate.

[0010] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, during use, the evenly distributed protrusion structure at the end of the needle tube cooperates with the slot and spacer in the interface seat to achieve initial positioning of the needle tube at the interface seat. At the same time, the space formed by the limiting plate structure at the bottom of the piston and the auxiliary plate are mutually locked and positioned to complete the positioning work between the push rod and the piston through the auxiliary plate. Compared with the conventional case where the protrusion structure on the outer wall of the right end of the needle tube is used to connect the interface seat, the technical solution adopted by this utility model can achieve a fairly stable connection between the needle tube and the interface seat, providing structural protection for the stable operation of the high-pressure injection pump. The overall structure is compact and easy for operators to install and maintain. It solves the problem of poor stability of the needle tube connection structure and the injection pump interface in the existing high-pressure injection pump, which affects the operation of the high-pressure injection pump.

[0011] 2. In this utility model, during use, the space formed between the limiting plates and the auxiliary plate are mutually locked and limited, providing structural protection for the push rod to push the piston to complete the liquid injection. Attached Figure Description

[0012] Figure 1 This is an overall view of the high-pressure injection pump needle tube connection structure of this utility model; Figure 2 This is a partial structural diagram of the piston, auxiliary plate, and connecting rod in the high-pressure injection pump needle tube connection structure of this utility model; Figure 3 This is a schematic diagram of the exploded state of the needle tube connection structure of the high-pressure injection pump of this utility model.

[0013] Legend: 1. Needle; 101. Ring plate; 102. Protrusion; 2. Interface seat; 201. Slot; 202. Spacer; 3. Injection port; 4. Push rod; 401. Auxiliary plate; 5. Piston; 501. Limiting plate; 502. Space. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] This utility model provides a high-pressure injection pump needle tube connection structure, including a needle tube 1 with a tapered left end, an interface seat 2 movably connected to the right end of the needle tube 1, an injection port 3 installed at the left end of the needle tube 1, a ring plate 101 fixedly connected to the outer wall of the needle tube 1, and protrusions 102 evenly distributed on the outer wall of the right end of the needle tube 1. The interface seat 2 is provided with a slot 201, the shape of which matches the shape of the protrusions 102. The inner surface of the interface seat 2... The wall is also evenly distributed with partitions 202, which are staggered with the slots 201. A slidable push rod 4 is installed in the interface seat 2, and a slidable piston 5 is provided in the needle tube 1. Limiting plates 501 are symmetrically distributed at the end of the piston 5. The cross-section of the limiting plate 501 is L-shaped. An auxiliary plate 401 is fixedly connected to the end of the push rod 4. The auxiliary plate 401 helps to connect the push rod 4 and the piston 5 into a whole. In actual use, the high-pressure injection pump needle tube 1 connection structure has protrusions 102 evenly distributed on the outer wall of the right end of the needle tube 1. When the right end of the needle tube 1 is connected to the interface seat 2, the protrusions 102 enter the interface seat 2 along the slot 201. When the needle tube 1 enters the interface seat 2, the piston 5 is at the right end of the needle tube 1. When the needle tube 1 enters the interface seat 2, the space 502 between adjacent limiting plates 501 and the relative position of the auxiliary plate 401 do not interfere with each other. When the ring plate 101 of the needle tube 1 abuts against the interface seat 2, the operator rotates the needle tube 1, causing the protrusions 102 on the needle tube 1 to rotate to the inner side of the partition 202 and abut against the inner wall of the partition 202. At this time, the space 502 formed between the adjacent limiting plates 501 at the end of the piston 5 and the auxiliary plate 401 are mutually locked and limited. Figure 2 The relative positions of the middle limiting plate 501 and the auxiliary plate 401 complete the limiting work between the piston 5, the auxiliary plate 401, and the push rod 4. The above completes the connection limiting work between the needle tube 1 and the interface seat 2. Through the cooperation of the evenly distributed protrusions 102 structure at the end of the needle tube 1, the slots 201 and the spacers 202 in the interface seat 2, the needle tube 1 is initially limited at the position of the interface seat 2. At the same time, the space 502 formed by the limiting plate 501 structure at the bottom of the piston 5 and the auxiliary plate 401 are mutually locked and limited, completing the limiting work between the push rod 4 and the piston 5 through the auxiliary plate 401. Compared with the conventional case where the protrusions 102 structure set on the outer wall of the right end of the needle tube 1 are connected to the interface seat 2, the technical solution adopted by this utility model can achieve a relatively stable connection between the needle tube 1 and the interface seat 2, providing structural guarantee for the stable operation of the high-pressure injection pump. The overall structure is compact and easy for staff to install and maintain.

[0017] Example 1 like Figure 1-3As shown, the cross-section of the auxiliary plate 401 is an elliptical structure, and the space 502 formed between adjacent limiting plates 501 is mutually engaged and limited with the auxiliary plate 401. The effect achieved by the entire embodiment 1 is that, in use, the space 502 formed between the limiting plates 501 and the auxiliary plate 401 are mutually locked and limited, providing structural protection for the push rod 4 to push the piston 5 to complete the liquid injection later.

[0018] Working Principle: The needle tube has evenly distributed protrusions on its right outer wall. When the right end of the needle tube is connected to the interface seat, the protrusions enter the interface seat along the slots. When the needle tube enters the interface seat, the piston is at the right end of the needle tube. At this point, the space between adjacent limiting plates and the relative position of the auxiliary plate do not interfere with each other. When the annular plate of the needle tube abuts against the interface seat, the operator rotates the needle tube, causing the protrusions on the needle tube to rotate to the inside of the partition block and abut against its inner wall. At this time, the space formed between the adjacent limiting plates at the piston end and the auxiliary plate mutually engage and limit each other. (Refer to...) Figure 2 The relative positions of the middle limit plate and the auxiliary plate complete the limiting work between the piston, the auxiliary plate, and the push rod, thus completing the connection limiting work between the needle tube and the interface seat.

Claims

1. A high-pressure injection pump needle tube connecting structure, comprising a left end of a needle tube (1) being tapered, a right end of the needle tube (1) movably connected with a connector seat (2), characterized in that, The needle tube (1) has an injection port (3) installed at its left end. A ring plate (101) is fixedly connected to the outer wall of the needle tube (1). Protrusions (102) are evenly distributed on the outer wall of the right end of the needle tube (1). A slot (201) is provided on the interface seat (2). The shape of the slot (201) matches the shape of the protrusion (102).

2. The high pressure syringe pump needle hub connection of claim 1, wherein, The inner wall of the interface seat (2) is also evenly distributed with partitions (202), and the partitions (202) and the slots (201) are staggered.

3. The high pressure syringe pump needle hub connection of claim 1, wherein, The interface seat (2) is equipped with a sliding push rod (4), and the needle tube (1) is equipped with a sliding piston (5).

4. The high pressure syringe pump needle hub connection of claim 3, wherein, The piston (5) has a limiting plate (501) symmetrically distributed at its end. The limiting plate (501) has an L-shaped cross-section. The end of the push rod (4) is fixedly connected to an auxiliary plate (401).

5. The high pressure syringe pump needle hub connection of claim 4, wherein, The cross-section of the auxiliary plate (401) is an elliptical structure, and the space (502) formed between the adjacent limiting plates (501) is mutually engaged and limited with the auxiliary plate (401).

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