High-stability needleless infusion connector

Abstract

The invention discloses a high-stability needleless infusion connector, and relates to the technical field of infusion instruments. Comprising a first pipe, the right side of the first pipe is in through connection with a second pipe, the second pipe is in threaded connection with an end cap, a sealing assembly is arranged on the inner side of the first pipe, the left side of the first pipe is in through connection with a third pipe, a partition plate is fixed to the inner side of the third pipe, and a top cover is installed at the top of the third pipe; a washing pipe assembly is arranged between the bottom of the inner side of the third pipe and the partition plate and comprises an installation column, the installation column is rotationally installed between the bottom of the third pipe and the center opening of the partition plate, an installation block is fixed in a groove in the outer side of the installation column, and the washing pipe assembly is used for pulse type washing. A second pipe is arranged to be matched with the flushing pipe assembly, so that stable pulse flushing can be completed without a skilled pressing technique; and by arranging the pipe washing assembly and the pipe sealing assembly, positive-pressure pipe sealing is synchronously completed after pulse washing is completed.

Description

Technical Field

[0001] The invention relates to the technical field of infusion equipment, in particular to a high-stability needle-free infusion connector. Background Art

[0002] A needle-free infusion connector is a device used in the medical field. It is usually used together with medical devices such as three-way stopcocks or indwelling needles that are used for drug administration in clinical procedures. Needle-free infusion connectors are mainly used for injection of liquid medicine, gravity infusion and liquid extraction in medical treatment. They are mainly divided into positive pressure needle-free infusion connectors, negative pressure needle-free infusion connectors and zero pressure needle-free infusion connectors.

[0003] However, after the infusion of the existing needle-free infusion connector is completed, the medical staff needs to connect the syringe and inject the sealing liquid in the syringe into the pipeline of the indwelling needle through staged pressing to achieve pulse flushing of the liquid in the pipeline of the indwelling needle. The existing needle-free infusion connector is not convenient and easy to achieve the effect of pulse flushing through continuous injection, and requires medical staff to have skilled techniques and has high requirements for operators. At the same time, after completing the pulse flushing, the indwelling needle pipeline needs to be positively sealed. The medical staff pulls out the syringe while injecting the last section of sealing liquid to achieve positive pressure sealing in the indwelling needle pipeline. This process needs to be completed simultaneously by the medical staff, which is not convenient to complete the positive pressure sealing operation conveniently and synchronously after the pulse flushing. Summary of the invention

[0004] The purpose of the present invention is to provide a high-stability needle-free infusion connector to solve the problem that the existing needle-free infusion connector proposed in the above background technology is not convenient and easy to achieve the effect of pulse flushing through continuous injection, and it is not convenient and easy to complete the positive pressure tube sealing operation synchronously after pulse flushing. The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides a solution that is significantly different from the existing technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-stability needle-free infusion connector, comprising a No. 1 tube, a No. 2 tube is connected through the right side of the No. 1 tube, an end cap is threadedly connected to the No. 2 tube, a sealing assembly is arranged on the inner side of the No. 1 tube, a No. 3 tube is connected through the left side of the No. 1 tube, a partition is fixed on the inner side of the No. 3 tube, a top cover is installed on the top of the No. 3 tube, a flushing tube assembly is arranged between the inner bottom of the No. 3 tube and the partition, the flushing tube assembly comprises a mounting column, the mounting column is rotatably mounted between the bottom of the No. 3 tube and the central opening of the partition, a mounting block is fixed in the outer groove of the mounting column, and the flushing tube assembly is used for pulse flushing;

[0006] The tube sealing assembly is arranged between the flushing tube assembly and the top cover, and is used for positive pressure tube sealing.

[0007] Preferably, the inner cavity of the No. 3 tube is divided into two upper and lower chambers by a partition, and the partition is provided with a liquid inlet hole at a position offset from the center. The connection position between the No. 3 tube and the No. 1 tube is higher than the connection position between the No. 2 tube and the No. 1 tube.

[0008] Preferably, the sealing assembly includes a first silicone plug, which is slidably arranged on the top of the inner cavity of tube No. 1, and a top connection block is arranged below the first silicone plug, and the top connection block is fixed in the inner cavity of tube No. 1.

[0009] Preferably, a plurality of grooves are provided at equal angles on the outer side of the mounting column, and the mounting block is designed as a slope structure, and the slope structure of the mounting block is used for sliding against each other when the liquid flows, and the mounting block slides in a sealed manner with the third pipe and the partition.

[0010] Preferably, a "cross" crack is provided at the upper and lower ends of the first silicone plug, and the convex column at the center of the top connecting block is designed as a conical structure. The "cross" crack of the first silicone plug facilitates the insertion of the convex column of the conical structure of the top connecting block, and liquid guide holes are provided on the lower side of the top connecting block and the convex column. The silicone of the lower section of the first silicone plug is designed as a bellows structure, and the bellows structure of the first silicone plug is used to facilitate the deformation and contraction of the first silicone plug.

[0011] Preferably, the tube sealing assembly includes a slide groove column, which is installed on the top of the mounting column, a slider is slidably arranged in the spiral slide groove on the outer side of the slide groove column, the outer end of the slider is fixed on the inner side of the moving block, a connecting plate is connected to the lower side of the outer end of the moving block, a second silicone plug is installed on the upper end of the connecting plate, and the second silicone plug is slidably arranged in the circular opening on the top cover.

[0012] Preferably, the moving block is designed as a polygonal structure, and the polygonal structure of the moving block corresponds to the polygonal opening of the partition. The moving block slides vertically in the polygonal opening of the partition. A "convex" shaped recess is provided on the inner side of the second silicone plug, and the "convex" shaped recess of the second silicone plug is used for liquid injection and sealing. The circular opening on the connecting plate corresponds to the liquid inlet hole of the partition.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention provides a first silicone plug and a top connection block. When the infusion interface is connected, the protruding tube mouth of the infusion tube connection end contacts the first silicone plug, so that the first silicone plug moves downward in the No. 1 tube, so that the protruding column of the top connection block drills out from the "cross" crack of the first silicone plug and is connected to the protruding tube mouth of the infusion tube connection end. When the infusion is finished, the infusion tube connection end is screwed off, and the first silicone plug is synchronously reset to complete the sealing, thereby preventing external pollution. At the same time, when pulse flushing is required after the infusion is finished, the tube sealing liquid in the syringe is continuously injected between the two mounting blocks through the second silicone plug, the connecting plate and the partition plate, so that the mounting block drives the mounting column to rotate. The mounting column rotates to intermittently send the tube sealing liquid between the multiple mounting blocks to the No. 1 tube, and in this process, the tube sealing liquid sent into the No. 1 tube generates a pressure difference, thereby generating vortices between the tube sealing liquids, realizing stable pulse flushing, avoiding the need for the operator to complete this process through skilled techniques during pulse flushing, and reducing the difficulty of pulse flushing of the pipeline.

[0015] The present invention arranges the cooperation between the sealing tube assembly and the flushing tube assembly so that during the rotation of the installation column, the slide groove column is also driven to rotate synchronously. When the slide groove column rotates, the position of the spiral groove on the outer side changes, so that the slider drives the moving block to move upward in the polygonal opening of the top cover. When the moving block moves, it drives the connecting plate and the second silicone plug to move upward synchronously. When the connecting plate moves up to overlap with the top cover, the two side ports at the lower side of the second silicone plug are higher than the top cover. During the continuous injection of the sealing liquid by the syringe, the second silicone plug is synchronously sealed to the top cover, thereby realizing the positive pressure sealing operation, further reducing the difficulty of the pulse flushing and positive pressure sealing operations performed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the structure of the sealing assembly of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the first silicone plug of the present invention;

[0020] Figure 5 It is a schematic diagram of the cross-section structure of the No. 3 pipe, the flushing pipe assembly and the sealing pipe assembly of the present invention;

[0021] Figure 6 It is a schematic diagram of the right side cross-section structure of the No. 3 pipe, the flushing pipe assembly and the sealing pipe assembly of the present invention;

[0022] Figure 7 It is a schematic diagram of the cross-section of the No. 3 pipe, the top cover, the flushing pipe assembly and the sealing pipe assembly of the present invention;

[0023] Figure 8 It is a schematic diagram of the disassembled structure of the No. 3 pipe, the top cover, the flushing pipe assembly and the sealing pipe assembly of the present invention;

[0024] Fig. 9 It is a schematic cross-sectional view of the mounting column and the sealing tube assembly of the present invention.

[0025] In the figure: 1. Pipe No. 1; 2. Pipe No. 2; 3. Pipe No. 3; 31. Partition; 32. Top cover; 6. End cap; 7. Sealing assembly; 71. First silicone plug; 72. Top connection block; 8. Punch pipe assembly; 81. Mounting column; 82. Mounting block; 9. Sealing pipe assembly; 91. Slide column; 92. Sliding block; 93. Moving block; 94. Connecting plate; 95. Second silicone plug. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] See also Figure 1-Figure 9The present invention provides a technical solution: a high-stability needle-free infusion connector, comprising a No. 1 tube 1, a No. 2 tube 2 is connected through the right side of the No. 1 tube 1, and the No. 2 tube 2 is threadedly connected with an end cap 6. A sealing component 7 is arranged on the inner side of the No. 1 tube 1, and the sealing component 7 comprises a first silicone plug 71, which is slidably arranged on the top of the inner cavity of the No. 1 tube 1, and a top connection block 72 is arranged below the first silicone plug 71, and the top connection block 72 is fixed in the inner cavity of the No. 1 tube 1. A "cross" crack is opened at the upper and lower ends of the first silicone plug 71, and a convex column at the middle position of the top connection block 72 is designed as a conical structure. The "cross" crack of the first silicone plug 71 facilitates the insertion of the conical structure convex column of the top connection block 72, and a liquid guide hole groove is opened on the lower side and the convex column of the top connection block 72, and the lower section of the silicone of the first silicone plug 71 is designed as a bellows structure, and the bellows structure of the first silicone plug 71 is used to facilitate the deformation and contraction of the first silicone plug 71, and the No. 3 tube 3 is connected through the left side of the No. 1 tube 1. A partition 31 is fixed on the inner side of the No. 3 pipe 3, and the inner cavity of the No. 3 pipe 3 is divided into two upper and lower chambers by the partition 31. The partition 31 is provided with a liquid inlet hole at a position offset from the center. The connection position of the No. 3 pipe 3 and the No. 1 pipe 1 is higher than the connection position of the No. 2 pipe 2 and the No. 1 pipe 1. A top cover 32 is installed on the top of the No. 3 pipe 3, and a flushing pipe assembly 8 is arranged between the inner bottom of the No. 3 pipe 3 and the partition 31. The flushing pipe assembly 8 includes a mounting column 81, which is rotatably mounted between the bottom of the No. 3 pipe 3 and the central opening of the partition 31. A mounting block 82 is fixed in the groove on the outer side of the mounting column 81, and a plurality of grooves are provided on the outer side of the mounting column 81 at equal angles. The mounting block 82 is designed as an inclined structure. The inclined structure of the mounting block 82 is used for sliding against each other when the liquid flows. The mounting block 82 is sealed and slid between the No. 3 pipe 3 and the partition 31. The flushing pipe assembly 8 is used for pulse flushing. The sealing pipe assembly 9 is arranged between the flushing pipe assembly 8 and the top cover 32. The sealing pipe assembly 9 is used for positive pressure sealing.

[0029] When pulse flushing of the pipeline is required after the infusion is completed, the sealing liquid syringe port is inserted into the second silicone plug 95, and the sealing liquid is continuously injected. The sealing liquid passes through the second silicone plug 95, the opening on the movable block 93 and the liquid inlet hole of the partition 31, and finally flows into the cavity between the two mounting blocks 82 below the partition 31. The mounting column 81 drives the sealing liquid between multiple mounting blocks 82 to flow into the No. 1 tube 1 in sequence, so that a pressure difference occurs between the liquids sent in from the front and back. When the sealing liquid at the rear flows, a vortex is generated to flush the No. 1 tube 1 and the No. 2 tube 2 as well as the liquid attached to the pipeline into the body.

[0030] Embodiment 2

[0031] Based on Example 1, please refer to Figure 1-Figure 9, the sealing tube assembly 9 is arranged between the flushing tube assembly 8 and the top cover 32, the sealing tube assembly 9 includes a slide column 91, the slide column 91 is installed on the top of the mounting column 81, a slider 92 is slidably arranged in the spiral slide groove outside the slide column 91, the outer end of the slider 92 is fixed to the inner side of the moving block 93, the lower side of the outer end of the moving block 93 is connected to a connecting plate 94, and a second silicone plug 95 is installed on the upper end of the connecting plate 94. The second silicone plug 95 is slidably arranged in the circular opening on the top cover 32, the moving block 93 is designed as a polygonal structure, the polygonal structure of the moving block 93 corresponds to the polygonal opening of the partition 31, the moving block 93 slides vertically in the polygonal opening of the partition 31, a "convex" shaped recess is provided on the inner side of the second silicone plug 95, the "convex" shaped recess of the second silicone plug 95 is used for liquid injection and sealing, the circular opening provided on the connecting plate 94 corresponds to the liquid inlet hole of the partition 31, and the sealing tube assembly 9 is used for positive pressure sealing;

[0032] When positive pressure sealing is required after pulse flushing is completed, the installation column 81 rotates, and at the same time, the slide groove column 91 is driven to rotate synchronously. When the slide groove column 91 rotates, the position of the spiral groove on the outside changes, so that the slider 92 drives the moving block 93 to move upward in the polygonal opening of the top cover 32. When the moving block 93 moves, it drives the connecting plate 94 and the second silicone plug 95 to move upward synchronously. When the connecting plate 94 moves up to overlap with the top cover 32, the ports on both sides below the second silicone plug 95 are higher than the top cover 32, completing the positive pressure sealing.

[0033] Working principle: When using the high-stability needle-free infusion connector, the operator connects the infusion interface with the No. 1 tube 1 through a thread. During this process, the protruding tube opening of the infusion interface is screwed into the No. 1 tube 1 by the operator and contacts the first silicone plug 71, so that the first silicone plug 71 moves downward in the No. 1 tube 1. At the same time, the first silicone plug 71 contacts the conical protrusion of the top connection block 72, so that the protrusion of the top connection block 72 drills out from the "cross" crack of the first silicone plug 71 and connects with the protruding tube opening of the infusion tube connection end, completing the infusion connection. When performing needle injection, unscrew the end cap 6 at the upper end of the No. 2 tube 2 and perform the injection. After the injection is completed, the No. 2 tube 2 is disinfected and the end cap 6 is screwed on again;

[0034] When the infusion or injection is completed and pulse flushing and positive pressure sealing are required, the operator inserts the sealing liquid syringe port into the second silicone plug 95 and continuously injects the sealing liquid. During this process, the sealing liquid passes through the two side ports below the second silicone plug 95, the opening on the moving block 93 and the liquid inlet hole of the partition 31, and finally flows into the cavity between the two mounting blocks 82 below the partition 31, and drives the mounting column 81 to rotate through the mounting block 82. The rotation of the mounting column 81 causes the sealing liquid between the two mounting blocks 82 to move to the through connection between the third tube 3 and the first tube 1, and then flows into the first tube 1 and the third tube 3 and the connected hose at the lower end of the first tube 1, and finally flows into the human body through the needle. In the above process, the mounting column 81 drives the sealing liquid between multiple mounting blocks 82 to flow into the first tube 1. Because the sealing liquid is intermittently fed in sequence, a pressure difference occurs between the liquids fed in front and behind. When the sealing liquid flows at the rear, a vortex is generated to flush the first tube 1 and the second tube 2 and the liquid attached to the pipeline into the body;

[0035] When the mounting post 81 rotates, the slide slot post 91 is also driven to rotate synchronously. When the slide slot post 91 rotates, the position of the spiral groove on the outer side changes, so that the slider 92 drives the moving block 93 to move upward in the polygonal opening of the top cover 32. When the moving block 93 moves, it drives the connecting plate 94 and the second silicone plug 95 to move upward synchronously. When the connecting plate 94 moves up to coincide with the top cover 32, the two side ports below the second silicone plug 95 are higher than the top cover 32, completing the positive pressure tube sealing. Before the next infusion, after disinfecting the second silicone plug 95 and the moving block 93, first unscrew the end cap 6 on the No. 2 tube 2, and then press the moving block 93, so that the slider 92 drives the mounting post 81 to rotate and reset. After the reset is completed, the end cap 6 is screwed back for subsequent flushing.

[0036] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. In the description of the present invention, unless otherwise specified, "multiple" means two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 high-stability needle-free infusion connector, characterized in that: The invention comprises a No. 1 pipe (1), wherein the No. 1 pipe (1) is connected to a No. 2 pipe (2) on the right side thereof, wherein an end cap (6) is threadedly connected to the No. 2 pipe (2), wherein a sealing assembly (7) is arranged on the inner side of the No. 1 pipe (1), wherein the No. 3 pipe (3) is connected to the left side thereof, wherein a partition (31) is fixed on the inner side of the No. 3 pipe (3), wherein a top cover (32) is installed on the top of the No. 3 pipe (3), wherein a flushing pipe assembly (8) is arranged between the inner bottom of the No. 3 pipe (3) and the partition (31), wherein the flushing pipe assembly (8) comprises a mounting column (81), wherein the mounting column (81) is rotatably mounted between the bottom of the No. 3 pipe (3) and a central opening of the partition (31), wherein a mounting block (82) is fixed in a groove outside the mounting column (81), and wherein the flushing pipe assembly (8) is used for pulse flushing; A tube sealing assembly (9), wherein the tube sealing assembly (9) is arranged between the flushing assembly (8) and the top cover (32), and the tube sealing assembly (9) is used for positive pressure tube sealing.

2. A high stability needle-free infusion connector according to claim 1, characterized in that: The inner cavity of the No. 3 pipe (3) is divided into two upper and lower chambers by a partition (31); the partition (31) is provided with a liquid inlet hole at a position offset from the center; and the connection position between the No. 3 pipe (3) and the No. 1 pipe (1) is higher than the connection position between the No. 2 pipe (2) and the No. 1 pipe (1).

3. A high stability needle-free infusion connector according to claim 2, characterized in that: The sealing assembly (7) comprises a first silicone plug (71), the first silicone plug (71) being slidably disposed at the top of the inner cavity of the first tube (1), a top connection block (72) being disposed below the first silicone plug (71), the top connection block (72) being fixed to the inner cavity of the first tube (1).

4. A high-stability needle-free infusion connector according to claim 3, characterized in that: The outer side of the mounting column (81) is provided with a plurality of grooves at equal angles. The mounting block (82) is designed as a sloped structure. The sloped structure of the mounting block (82) is used for sliding against the flow of liquid. The mounting block (82) is sealed and slidable with the third pipe (3) and the partition plate (31).

5. A high stability needle-free infusion connector according to claim 4, characterized in that: The first silicone plug (71) is provided with a cross-shaped crack at the upper and lower ends, and the centrally located convex column of the top connection block (72) is designed as a conical structure. The cross-shaped crack of the first silicone plug (71) facilitates the insertion of the conical structure convex column of the top connection block (72). Liquid guide holes are provided on the lower side of the top connection block (72) and the convex column. The silicone at the lower section of the first silicone plug (71) is designed as a bellows structure. The bellows structure of the first silicone plug (71) is used to facilitate the deformation and contraction of the first silicone plug (71).

6. A high stability needle-free infusion connector according to claim 5, characterized in that: The tube sealing assembly (9) comprises a slide groove column (91), wherein the slide groove column (91) is mounted on the top of the mounting column (81), a slider (92) is slidably arranged in a spiral slide groove outside the slide groove column (91), an outer end of the slider (92) is fixed to the inner side of a moving block (93), a connecting plate (94) is connected to the lower side of the outer end of the moving block (93), a second silicone plug (95) is mounted on the upper end of the connecting plate (94), and the second silicone plug (95) is slidably arranged in a circular opening on the top cover (32).

7. The high-stability needle-free infusion connector according to claim 6, characterized in that: The moving block (93) is designed as a polygonal structure. The polygonal structure of the moving block (93) corresponds to the polygonal opening of the partition (31). The moving block (93) slides vertically in the polygonal opening of the partition (31). A "convex"-shaped recess is provided on the inner side of the second silicone plug (95). The "convex"-shaped recess of the second silicone plug (95) is used for liquid injection and sealing. The circular opening provided on the connecting plate (94) corresponds to the liquid inlet hole of the partition (31).

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