Anti-reflux device for analgesia pump

Abstract

An anti-backflow device for an analgesia pump comprises a connecting cylinder and a supporting disc fixed in the connecting cylinder, one end of the connecting cylinder is fixedly communicated with a connector, the supporting disc is arranged in the connecting cylinder away from the connector, and an annular blocking edge structure is arranged on the inner side of the end, at one end of the connector, of the connecting cylinder. A silica gel elastic column filled with air is fixed to the supporting disc, a silica gel plug is arranged at the other end of the silica gel elastic column and covers an opening of the blocking edge structure, and a plurality of through holes are formed in the supporting disc. The silica gel elastic columns and the silica gel plugs are made of medical silica gel, so that the silica gel elastic columns and the silica gel plugs are good in corrosion resistance and do not need to be rusted, an air spring structure with more excellent elastic performance is formed, and the square countercurrent effect can be effectively guaranteed; the sleeve structure at the fixed end of the silica gel elastic column is sleeved in the annular groove of the connecting column through the lip edge, so that not only is the installation convenient, but also the fixation is firmer in the mode, and the safety and reliability of the whole anti-reflux device are ensured.

Description

Technical Field

[0001] The utility model relates to an anti - backflow device, specifically an anti - backflow device for an analgesia pump. Background Art

[0002] As an important medical device, the design purpose of an analgesia pump is mainly to effectively relieve the pain of patients and reduce the side effects of analgesic drugs. Among them, the anti - backflow function is an important feature in its design. The anti - backflow design of the analgesia pump is mainly achieved by adding specific devices to the infusion system. For example, one - way valves are designed at both the front and rear ends, and this design constructs a two - way anti - backflow system.

[0003] The anti - backflow function of the analgesia pump is of great significance. It is mainly manifested in improving safety. The anti - backflow design can effectively avoid the backflow phenomenon of analgesic drugs during infusion, thereby reducing the risks of drug contamination and cross - infection, and improving the safety of patients. The anti - backflow design can ensure the stable concentration of analgesic drugs in the blood, which is conducive to achieving better analgesic treatment effects. Reducing complications, the stable infusion of the analgesia pump can reduce the release of stress hormones in the patient's body, which is conducive to reducing the heart rate and preventing the occurrence of complications such as postoperative hypertension. The anti - backflow function of the analgesia pump makes the analgesia pump play an increasingly important role in postoperative analgesia, cancer pain treatment, etc., providing more choices and possibilities for the treatment and recovery of patients.

[0004] The utility model patent CN221106610U discloses an anti - backflow device for an analgesia pump, including a first connection part, a second connection part and a main body part. The first main body part is adapted to be connected to the infusion tube of the analgesia pump through a threaded joint, the second connection part is adapted to be connected to the liquid inlet tube of the indwelling needle, the main body part is arranged between the first connection part and the second connection part, and a one - way anti - backflow structure is provided in the middle. The anti - backflow device for the analgesia pump of the present utility model is installed between the infusion tube of the analgesia pump and the liquid inlet tube of the indwelling needle. When the human venous blood pressure rises or the vein is blocked resulting in increased pressure, it can avoid the backflow of blood or infusion fluid, avoid ascending infection, and improve the safety of using the analgesia pump. The specific elastic part structure and material given are medical stainless steel material, that is, a spring. In the long - term use process, it is found that due to the inevitable presence of a certain amount of drug or water residue, it will also cause corrosion of this spring structure. Rust will not only contaminate the drug and cause harm to the human body, but also affect its elasticity, resulting in elastic failure, and further affecting its anti - backflow function. Utility Model Content

[0005] To solve the above problems, the purpose of the present utility model is to provide an anti - backflow device for an analgesia pump.

[0006] To achieve the above object, the technical solution of the present utility model is: an anti-backflow device for an analgesic pump, including a connecting cylinder and a supporting disc fixed inside the connecting cylinder. One end of the connecting cylinder is fixedly communicated with a connecting head. The supporting disc is arranged inside the connecting cylinder away from the connecting head. An annular retaining edge structure is arranged on the inner side of the end of the connecting cylinder at one end of the connecting head. The supporting disc is fixed with a silicone elastic column filled with air inside. The other end of the silicone elastic column is provided with a silicone plug, and the silicone plug covers the opening of the retaining edge structure. The supporting disc is provided with a plurality of through holes.

[0007] Further, a spherical or circular protruding structure protruding outward is arranged in the middle part of the silicone elastic column.

[0008] Further, a sleeve structure is arranged at the fixed end of the silicone elastic column. An inwardly bent lip is arranged at the outer end of the sleeve structure, and the lip is sleeved in the annular groove of the connecting column. One end of the connecting column provided with the annular groove is fixedly connected with the supporting disc.

[0009] Further, the through holes are in a long strip arc structure and are arranged around the axis center of the supporting disc.

[0010] Further, the outer end of the silicone plug is in a spherical structure.

[0011] Further, the opening of the retaining edge structure is in a funnel shape.

[0012] Further, an external thread structure is arranged on the outer side surface of the connecting head, and an internal thread structure is arranged on the inner surface of the end of the connecting cylinder where the supporting disc is arranged.

[0013] In the normal state of the present utility model, the silicone plug blocks the retaining edge structure through the support of the silicone elastic column, so that the liquid medicine cannot flow from one end of the supporting disc to the connecting head, thus realizing the anti-backflow function. During normal flow, the liquid medicine pushes the silicone plug to cause slight compression deformation of the silicone elastic column, thereby flushing open the silicone plug and realizing normal forward flow.

[0014] The present utility model forms a one-way flow structure through the supporting disc, the silicone elastic column, the silicone plug and the retaining edge structure. The silicone elastic column and the silicone plug are made of medical silicone, which not only has good corrosion resistance and does not require rust prevention, but also has a soft material itself. Coupled with the silicone elastic column with air inside, an air spring structure with more excellent elastic performance is formed, which can effectively ensure the anti-backflow effect; the sleeve structure at the fixed end of the silicone elastic column is sleeved in the annular groove of the connecting column through the lip, which is not only convenient for installation, but also more firmly fixed in this way. Because during normal flow, the silicone elastic column is subjected to a force along the axial direction, its sleeve structure is more firmly sleeved on the connecting column, thus avoiding the detachment of the silicone elastic column and the silicone plug and ensuring the safety and reliability of the entire anti-backflow device. Description of the Drawings

[0015] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is a cross-sectional three-dimensional structure schematic diagram of the present utility model;

[0017] Figure 3 is a three-dimensional structure schematic diagram of the silica gel elastic column and the support disc part of the present utility model;

[0018] Figure 4 is a three-dimensional structure schematic diagram of the support disc part of the present utility model. Detailed implementation manners

[0019] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0021] The following will describe this embodiment in detail in conjunction with the accompanying drawings:

[0022] This embodiment provides an anti-backflow device for an analgesia pump. Please refer to the accompanying drawings in the specification Figures 1-3 .

[0023] Such as Figures 1-4As shown in the figure, an anti-backflow device for an analgesia pump includes a connecting cylinder 1 and a support disc 2 fixed inside the connecting cylinder 1. One end of the connecting cylinder 1 is fixedly communicated with a connecting head 3. The support disc 2 is arranged inside the connecting cylinder 1 away from the connecting head 3. An annular retaining edge structure 4 is arranged on the inner side of the end of the connecting cylinder 1 at one end of the connecting head 3. The support disc 2 is fixed with a silicone elastic column 5 filled with air inside. The other end of the silicone elastic column 5 is provided with a silicone plug 6. The silicone plug 6 covers the opening of the retaining edge structure 4. The support disc 2 is provided with a plurality of through holes 7.

[0024] In order to facilitate the compression of the silicone elastic column 5 during circulation, a spherical or circular protruding structure 8 protruding outward is arranged in the middle part of the silicone elastic column 5. In this way, when the silicone elastic column 5 is compressed, the protruding structure 8 at this part is more likely to deform first, so as to provide better compression and rebound effects, and even play a role in adjusting the force of compressing the silicone elastic column 5.

[0025] In order to facilitate installation, the fixed end of the silicone elastic column 5 is provided with a sleeve structure 9. The outer end of the sleeve structure 9 is provided with a lip 10 bent inward. The lip 10 is sleeved in the annular groove 12 of the connecting column 11. One end of the connecting column 11 provided with the annular groove 12 is fixedly connected with the support disc 2. In this way, one end of the silicone elastic column 5, that is, the sleeve structure 9 can be directly sleeved on the support disc 2, which is not only convenient for fixed installation, but also convenient for disassembly.

[0026] In order to ensure good circulation effect, the through hole 7 is a long strip arc structure and is arranged around the axis center of the support disc 2. This kind of through hole 7 can better ensure the flow rate.

[0027] In order to better fit the retaining edge structure 4 and ensure that the retaining edge structure 4 is blocked during backflow, the outer end of the silicone plug 6 is a spherical structure, and the opening of the retaining edge structure 4 is a funnel shape.

[0028] In order to facilitate connection and fixation, the outer side surface of the connecting head 3 is provided with an external thread structure, and the inner surface of the end of the connecting cylinder 1 provided with the support disc 2 is provided with an internal thread structure.

[0029] The working principle of the present utility model: In the normal state, the silicone plug 6 blocks the retaining edge structure 4 through the support of the silicone elastic column 5, so that the liquid medicine cannot flow from one end of the support disc 2 to the connecting head 3, thus realizing the anti-backflow function. During normal flow, the liquid medicine pushes the silicone plug 6 to cause slight compression deformation of the silicone elastic column 5, thereby opening the silicone plug 6 and realizing normal forward circulation.

[0030] Certainly, the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A backflow prevention device for an analgesic pump, comprising a connecting tube (1) and a supporting disc (2) fixed in the connecting tube (1), characterized in that: One end of the connecting tube (1) is fixedly connected to a connecting head (3); the supporting disc (2) is arranged in the connecting tube (1) away from the connecting head (3); an annular retaining edge structure (4) is arranged inside the end of the connecting tube (1) at one end of the connecting head (3); a silicone elastic column (5) filled with air is fixed to the supporting disc (2); a silicone plug (6) is arranged at the other end of the silicone elastic column (5); the silicone plug (6) covers the opening of the retaining edge structure (4); and a plurality of through holes (7) are arranged on the supporting disc (2).

2. The anti-backflow device for an analgesic pump according to claim 1, characterized in that: A spherical or annular protrusion structure (8) protruding outward is provided in the middle portion of the silicone elastic column (5).

3. The anti-backflow device for an analgesic pump according to claim 1, characterized in that: A sleeve structure (9) is provided at the fixed end of the silicone elastic column (5); an inwardly curved lip (10) is provided at the outer end of the sleeve structure (9); the lip (10) is sleeved in an annular groove (12) of the connecting column (11); and one end of the connecting column (11) provided with the annular groove (12) is fixedly connected to the supporting disc (2).

4. The anti-backflow device for an analgesic pump according to claim 1, characterized in that: The through hole (7) is a long arc-shaped structure and is arranged around the axis center of the supporting disc (2).

5. The anti-backflow device for analgesia pump according to claim 1, characterized in that: The outer end of the silicone plug (6) is a spherical structure.

6. The anti-backflow device for analgesia pump according to claim 1, characterized in that: The opening of the retaining edge structure (4) is funnel-shaped.

7. The anti-backflow device for analgesia pump according to claim 1, characterized in that: An external thread structure is provided on the outer side surface of the connecting head (3), and an internal thread structure is provided on the inner surface of one end of the connecting tube (1) on which the supporting disc (2) is provided.

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