Safe pre-filled catheter flusher

Abstract

The utility model discloses a safe pre-filled catheter flusher which comprises a sleeve, a piston is arranged in the sleeve, the piston is connected with a core rod, one end of the core rod leaves the sleeve and then is fixedly connected with a push plate, a liquid outlet pipe is arranged at the end, away from the push plate, of the sleeve, a threaded connection pipe is arranged on the outer side of the liquid outlet pipe, and the threaded connection pipe is fixedly connected with the sleeve. A gap is formed between the threaded connection pipe and the liquid outlet pipe, an anti-slip ring is arranged in the gap and fixed to the inner wall of the threaded connection pipe, the threaded connection pipe is in threaded connection with a sealing cap, a sealing gasket is fixed in the sealing cap, a wedging ring is arranged on the sealing gasket, and the wedging ring is connected with the threaded connection pipe. The anti-slip ring can be tightly attached to the inner wall when the liquid outlet pipe extends into the indwelling needle catheter connector, strong friction force can be formed by matching the anti-slip ring with the threads on the anti-slip ring, the liquid outlet pipe is prevented from being separated easily, use of the pre-filled catheter flusher is facilitated, and the structure that the anti-slip ring is matched with the sealing cap can further improve sealing performance and guarantee safety of internal medicine.

Description

Technical Field

[0001] The utility model relates to the technical field of catheter flushers, in particular to a safe pre-filled catheter flusher. Background Art

[0002] With the gradual improvement of medical standards, the disadvantages of using steel needles for infusion have been increasingly discovered. Indwelling needles have been widely used. They form a closed infusion pipeline by placing the catheter of the indwelling needle in the patient's veins or arteries and other blood circulation systems. After a puncture, it can be left in place for many days and can be infused multiple times, which simplifies the steps of the infusion operation and reduces the pain of patients. However, medical staff are required to flush the catheter and needle with a prefilled catheter flusher.

[0003] Chinese patent application number 201820187208.2 discloses a safe pre-filled catheter flusher, which reduces the contact area between rubber and liquid medicine, reduces the possibility of precipitation of additives in rubber, and prolongs the validity period of the catheter flusher. However, the safe pre-filled catheter flusher has the following shortcomings: In the prior art, when the pre-filled catheter flusher is connected to the indwelling needle catheter connector, the liquid outlet tube is generally inserted into the connector, relying on the friction between the mutual friction and the hand grip of the medical staff to prevent separation, which is inconvenient.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related art, the utility model proposes a safe pre-filled catheter flusher to overcome the above technical problems existing in the existing related art.

[0006] To this end, the specific technical solutions adopted by the utility model are as follows:

[0007] A safe prefilled catheter flusher comprises a sleeve, wherein a piston is arranged inside the sleeve, wherein the piston is connected to a core rod, wherein one end of the core rod is fixedly connected to a push plate after leaving the sleeve, wherein an end of the sleeve away from the push plate is provided with a liquid outlet pipe, wherein a threaded connecting pipe is arranged outside the liquid outlet pipe, wherein a gap is formed between the threaded connecting pipe and the liquid outlet pipe, wherein an anti-slip ring is arranged in the gap, wherein the anti-slip ring is fixed on the inner wall of the threaded connecting pipe, wherein a sealing cap is threadedly connected to the threaded connecting pipe, wherein a sealing gasket is fixed inside the sealing cap, wherein a fitting ring is arranged on the sealing gasket, wherein the fitting ring extends into the gap, and wherein the fitting ring is tightly attached to the anti-slip ring and the outer surface of the liquid outlet pipe.

[0008] Preferably, a liquid level mark is provided on the outer surface of the sleeve.

[0009] Preferably, a symmetrically arranged pressing plate is fixed on the outer surface of the sleeve near the opening.

[0010] Preferably, a sealing ring is provided on the outer side of the piston, and the sealing ring is in close contact with the inner wall of the sleeve.

[0011] Preferably, a reinforcing rib is fixed to the outer side of the core rod.

[0012] Preferably, an annular plate is formed outwardly at the outer side of the opening position of the sealing cap, a sealing ring is fixed on the annular plate, and an annular groove is provided on the sleeve at a position corresponding to the sealing ring.

[0013] Preferably, a sealing protrusion is formed upward at the center of the top of the sealing gasket, and the sealing protrusion extends into the liquid outlet pipe.

[0014] Preferably, the outer surface of the sealing cap is provided with anti-slip grooves.

[0015] The beneficial effects of the utility model are as follows: the utility model has a simple structure and a reasonable design, and is provided with structures such as a threaded connecting tube and an anti-slip ring. The anti-slip ring can be tightly attached to the inner wall when the liquid outlet tube is extended into the indwelling needle catheter connector, and can form a strong friction force in conjunction with the thread thereon, thereby preventing the liquid outlet tube from being easily separated, which is conducive to the use of the prefilled catheter flusher, and the structure of the anti-slip ring in conjunction with the sealing cap can further improve the sealing performance and ensure the safety of the internal medicine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a safe prefilled catheter flusher according to an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional view of a safe prefilled catheter flusher according to an embodiment of the utility model;

[0019] Figure 3 It is a structural diagram of a sealing cap of a safe prefilled catheter flusher according to an embodiment of the utility model;

[0020] Figure 4 A safe prefilled catheter flusher according to an embodiment of the utility model Figure 2 Enlarged view of point A in the middle.

[0021] In the figure:

[0022] 1. Sleeve; 2. Piston; 3. Core rod; 4. Push plate; 5. Liquid outlet pipe; 6. Threaded connecting pipe; 7. Gap; 8. Anti-slip ring; 9. Sealing cap; 10. Sealing gasket; 11. Fitting ring; 12. Liquid level mark; 13. Pressing plate; 14. Sealing ring; 15. Reinforcement rib; 16. Ring plate; 17. Sealing ring; 18. Ring groove; 19. Sealing protrusion. DETAILED DESCRIPTION

[0023] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0024] According to an embodiment of the utility model, a safe pre-filled catheter flusher is provided.

[0025] Embodiment 1

[0026] like Figure 1-4 As shown, a safe prefilled catheter flusher according to an embodiment of the utility model comprises a sleeve 1, a piston 2 is arranged inside the sleeve 1, the piston 2 is connected to a core rod 3, one end of the core rod 3 is fixedly connected to a push plate 4 after leaving the sleeve 1, a liquid outlet pipe 5 is arranged at the end of the sleeve 1 away from the push plate 4, a threaded connecting pipe 6 is arranged outside the liquid outlet pipe 5, a gap 7 is formed between the threaded connecting pipe 6 and the liquid outlet pipe 5, an anti-slip ring 8 is arranged in the gap 7, the anti-slip ring 8 is fixed on the inner wall of the threaded connecting pipe 6, and the threaded connecting pipe 6 is threadedly connected to a sealing cap 9. A sealing gasket 10 is fixed in the sealing cap 9, and a fitting ring 11 is provided on the sealing gasket 10. The fitting ring 11 extends into the gap 7. The fitting ring 11 is in close contact with the anti-slip ring 8 and the outer surface of the liquid outlet tube 5. The anti-slip ring 8 can be in close contact with the inner wall when the liquid outlet tube 5 is extended into the indwelling needle catheter connector, and a strong friction force can be formed with the thread thereon to prevent the liquid outlet tube 5 from being easily separated, which is conducive to the use of the prefilled catheter flusher, and the structure of the anti-slip ring 8 and the sealing cap 9 can further improve the sealing performance and ensure the safety of the internal medicine.

[0027] Embodiment 2

[0028] like Figure 1-4As shown, a safe prefilled catheter flusher according to an embodiment of the utility model comprises a sleeve 1, a piston 2 is arranged in the sleeve 1, the piston 2 is connected to a core rod 3, one end of the core rod 3 is fixedly connected to a push plate 4 after leaving the sleeve 1, a liquid outlet pipe 5 is arranged at the end of the sleeve 1 away from the push plate 4, a threaded connecting pipe 6 is arranged on the outer side of the liquid outlet pipe 5, a gap 7 is formed between the threaded connecting pipe 6 and the liquid outlet pipe 5, an anti-slip ring 8 is arranged in the gap 7, the anti-slip ring 8 is fixed on the inner wall of the threaded connecting pipe 6, the threaded connecting pipe 6 is threadedly connected to a sealing cap 9, a sealing gasket 10 is fixed in the sealing cap 9, a fitting ring 11 is arranged on the sealing gasket 10, the fitting ring 11 extends into the gap 7, the fitting ring 11 is tightly attached to the anti-slip ring 8 and the outer surface of the liquid outlet pipe 5, a liquid level mark 12 is arranged on the outer surface of the sleeve 1, a symmetrically arranged pressing plate 13 is fixed to the outer surface of the sleeve 1 near the opening, and a reinforcing rib 15 is fixed to the outer side of the core rod 3.

[0029] Embodiment 3

[0030] like Figure 1-4 As shown, a safe prefilled catheter flusher according to an embodiment of the utility model comprises a sleeve 1, a piston 2 is arranged inside the sleeve 1, the piston 2 is connected to a core rod 3, one end of the core rod 3 is fixedly connected to a push plate 4 after leaving the sleeve 1, a liquid outlet pipe 5 is arranged at the end of the sleeve 1 away from the push plate 4, a threaded connecting pipe 6 is arranged outside the liquid outlet pipe 5, a gap 7 is formed between the threaded connecting pipe 6 and the liquid outlet pipe 5, an anti-slip ring 8 is arranged in the gap 7, the anti-slip ring 8 is fixed on the inner wall of the threaded connecting pipe 6, the threaded connecting pipe 6 is threadedly connected to a sealing cap 9, a sealing gasket is fixed inside the sealing cap 9 10, a fitting ring 11 is provided on the sealing gasket 10, the fitting ring 11 extends into the gap 7, the fitting ring 11 is close to the anti-slip ring 8 and the outer surface of the liquid outlet pipe 5, a sealing ring 14 is provided on the outer side of the piston 2, the sealing ring 14 is close to the inner wall of the sleeve 1, an annular plate 16 is formed outwardly from the outer side of the opening position of the sealing cap 9, a sealing ring 17 is fixed on the annular plate 16, an annular groove 18 is provided on the sleeve 1 at a position corresponding to the sealing ring 17, a sealing protrusion 19 is formed upward at the center position of the top of the sealing gasket 10, the sealing protrusion 19 extends into the liquid outlet pipe 5, and an anti-slip pattern is provided on the outer surface of the sealing cap 9.

[0031] In summary, with the help of the above-mentioned technical scheme of the utility model, after the prefilled catheter flusher absorbs the flushing liquid, the sealing cap 9 is screwed on, and the sealing gasket 10, the fitting ring 11, the anti-slip ring 8, the sealing ring 17, the sealing protrusion 19 and other structures can greatly enhance the sealing performance and ensure the safety of the internal flushing liquid. When the prefilled catheter flusher is flushing, the liquid outlet tube 5 extends into the inner wall of the indwelling needle catheter connector, and the anti-slip ring 8 is close to the outer wall of the indwelling needle catheter connector, and cooperates with the threads on the outer wall of the indwelling needle catheter connector to form a strong friction force to prevent the prefilled catheter flusher from easily detaching, which is conducive to the use of the prefilled catheter flusher.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A safe prefilled catheter flusher, comprising a sleeve (1), characterized in that: The sleeve (1) is provided with a piston (2), the piston (2) is connected with a core rod (3), one end of the core rod (3) is fixedly connected with a push plate (4) after leaving the sleeve (1), the end of the sleeve (1) away from the push plate (4) is provided with a liquid outlet pipe (5), the outer side of the liquid outlet pipe (5) is provided with a threaded connection pipe (6), a gap (7) is formed between the threaded connection pipe (6) and the liquid outlet pipe (5), an anti-slip ring (8) is provided in the gap (7), the anti-slip ring (8) is fixed on the inner wall of the threaded connection pipe (6), the threaded connection pipe (6) is threadedly connected with a sealing cap (9), a sealing gasket (10) is fixed in the sealing cap (9), a fitting ring (11) is provided on the sealing gasket (10), the fitting ring (11) extends into the gap (7), and the fitting ring (11) is tightly attached to the anti-slip ring (8) and the outer surface of the liquid outlet pipe (5).

2. A safe prefilled catheter flusher according to claim 1, characterized in that: The outer surface of the sleeve (1) is provided with a liquid level mark (12).

3. A safe prefilled catheter flusher according to claim 2, characterized in that: A symmetrically arranged pressing plate (13) is fixed on the outer surface of the sleeve (1) near the opening.

4. A safe prefilled catheter flusher according to claim 3, characterized in that: A sealing ring (14) is provided on the outer side of the piston (2), and the sealing ring (14) is in close contact with the inner wall of the sleeve (1).

5. A safe prefilled catheter flusher according to claim 4, characterized in that: A reinforcing rib plate (15) is fixed on the outer side of the core rod (3).

6. A safe prefilled catheter flusher according to claim 5, characterized in that: An annular plate (16) is formed outwardly on the outer side of the opening position of the sealing cap (9), a sealing ring (17) is fixed on the annular plate (16), and an annular groove (18) is provided on the sleeve (1) at a position corresponding to the sealing ring (17).

7. A safe prefilled catheter flusher according to claim 6, characterized in that: A sealing protrusion (19) is formed upward at the center of the top of the sealing pad (10), and the sealing protrusion (19) extends into the liquid outlet pipe (5).

8. A safe prefilled catheter flusher according to claim 7, characterized in that: The outer surface of the sealing cap (9) is provided with anti-slip grooves.

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