A high-stability needleless infusion connector

Abstract

The present invention discloses a needleless infusion connector with high stability, which relates to the technical field of infusion devices. It includes a first tube, the right side of the first tube is connected through to a second tube, the second tube is threadedly connected with an end cap, a sealing assembly is arranged inside the first tube, the left side of the first tube is connected through to a third tube, a partition is fixed inside the third tube, a top cover is installed on the top of the third tube, and a flushing assembly is arranged between the bottom inside the third tube and the partition. The flushing assembly includes a mounting post, the mounting post is rotatably installed between the bottom of the third tube and the central opening of the partition, a mounting block is fixed in the outer groove of the mounting post, and the flushing assembly is used for pulsatile flushing; by setting the cooperation of the second tube and the flushing assembly, stable pulsatile flushing can be completed without a skilled pressing technique; by setting the flushing assembly and the tube sealing assembly, positive pressure tube sealing can be completed synchronously after pulsatile flushing.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion devices, and specifically to a needleless infusion adapter with high stability. Background Art

[0002] A needleless infusion adapter is a device used in the medical field, usually used together with medical devices such as three-way stopcocks or indwelling needles for drug administration during clinical procedures. Needleless infusion adapters are mainly used for injecting liquid medicine, gravity infusion, and liquid extraction in medical treatment, and are mainly divided into positive pressure needleless infusion adapters, negative pressure needleless infusion adapters, and zero pressure needleless infusion adapters.

[0003] However, after the infusion is completed with existing needleless infusion adapters, medical staff need to connect a syringe and inject the sealing liquid in the syringe into the indwelling needle tube in a staged pressing manner to achieve pulsed flushing of the liquid medicine in the indwelling needle tube. Existing needleless infusion adapters are not convenient to achieve the effect of pulsed flushing through continuous injection, require medical staff to have proficient techniques, and have high requirements for operators. At the same time, after pulsed flushing is completed, positive pressure sealing of the indwelling needle tube is required. Medical staff inject the last section of the sealing liquid and pull out the syringe at the same time to achieve positive pressure sealing of the indwelling needle tube. This process all needs to be completed synchronously by medical staff, and it is not convenient to synchronously complete the positive pressure sealing operation conveniently after pulsed flushing. Summary of the Invention

[0004] The purpose of the present invention is to provide a needleless infusion adapter with high stability to solve the problems in the above background art that existing needleless infusion adapters are not convenient to achieve the effect of pulsed flushing through continuous injection and are not convenient to synchronously complete the positive pressure sealing operation conveniently after pulsed flushing. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A needleless infusion adapter with high stability, including a first tube, the right side of the first tube is connected through and communicates with a second tube, the second tube is threadedly connected with an end cap, a sealing assembly is arranged inside the first tube, the left side of the first tube is connected through and communicates with a third tube, a partition is fixed inside the third tube, a top cover is installed on the top of the third tube, a flushing assembly is arranged between the bottom inside the third tube and the partition, the flushing assembly includes a mounting column, the mounting column is rotatably installed between the bottom of the third tube and the central opening of the partition, a mounting block is fixed in the outer groove of the mounting column, and the flushing assembly is used for pulsed flushing;

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

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

[0008] Preferably, the sealing assembly includes a first silica gel plug. The first silica gel plug is slidably arranged at the top of the inner cavity of the No. 1 pipe. A top contact block is arranged below the first silica gel plug, and the top contact block is fixed in the inner cavity of the No. 1 pipe.

[0009] Preferably, a plurality of grooves are equiangularly arranged on the outer side of the mounting post. The mounting block is designed as an inclined surface structure. The inclined surface structure of the mounting block is used for sliding against when the liquid flows. The mounting block is hermetically slidable between the No. 3 pipe and the partition plate.

[0010] Preferably, a "cross" crack is arranged at the upper and lower ends of the first silica gel plug. The convex column at the center position of the top contact block is designed as a conical structure. The "cross" crack of the first silica gel plug facilitates the insertion of the conical structure convex column of the top contact block. Liquid guiding hole grooves are arranged on the lower side of the top contact block and on the convex column. The lower section of the first silica gel plug is designed as a corrugated pipe structure, and the corrugated pipe structure of the first silica gel plug is used for facilitating the deformation and contraction of the first silica gel plug.

[0011] Preferably, the pipe sealing assembly includes a chute column. The chute column is installed at the top of the mounting post. A slider is slidably arranged in the spiral chute on the outer side of the chute column. The outer end of the slider is fixed to 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 silica gel plug is installed at the upper end of the connecting plate, and the second silica gel plug is slidably arranged in the circular opening on the top cover.

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

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] In the present invention, by providing a first silicone plug and a top contact block, when the infusion interface is connected, the protruding end of the infusion tube connection end abuts against the first silicone plug, causing the first silicone plug to move downward in the first tube, so that the protruding column of the top contact block drills out from the "cross" crack of the first silicone plug and connects with the protruding end of the infusion tube connection end. When the infusion is completed, the infusion tube connection end is unscrewed, and the first silicone plug is reset synchronously to complete the sealing, preventing external contamination. At the same time, when pulse flushing is required after the infusion is completed, the 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, causing the mounting block to drive the mounting column to rotate. The rotation of the mounting column intermittently sends the sealing liquid between the multiple mounting blocks into the first tube, and during this process, a pressure difference is generated in the sealing liquid sent into the first tube, so that a vortex is generated between the sealing liquids, realizing stable pulse flushing, avoiding the need for operators to complete this process through skilled techniques during pulse flushing, and reducing the operation difficulty of pulse flushing of the pipeline.

[0015] In the present invention, through the cooperation of the sealing tube assembly and the flushing tube assembly, during the rotation of the mounting column, the sliding groove column is synchronously driven to rotate. When the sliding groove column rotates, the position of the spiral groove on the outside changes, causing the slider to drive 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 coincide with the top cover, the two side ports below the second silicone plug are higher than the top cover, completing the sealing of the top cover by the second silicone plug during the continuous injection of the sealing liquid by the syringe, realizing positive pressure sealing operation, and further reducing the operation difficulty of synchronous pulse flushing and positive pressure sealing. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 is a front view sectional structural schematic diagram of the present invention;

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

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

[0020] Figure 5 is a front sectional structural schematic diagram of the third tube, the flushing tube assembly and the sealing tube assembly of the present invention;

[0021] Figure 6 is a right sectional structural schematic diagram of the third tube, the flushing tube assembly and the sealing tube assembly of the present invention;

[0022] Figure 7 is a sectional view of the third tube, a structural schematic diagram of the top cover, the flushing tube assembly and the sealing tube assembly of the present invention;

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

[0024] Figure 9 This is a schematic cross-sectional view of the mounting post and the pipe sealing assembly of the present invention.

[0025] In the figure: 1, No. 1 pipe; 2, No. 2 pipe; 3, No. 3 pipe; 31, partition board; 32, top cover; 6, end cap; 7, sealing assembly; 71, first silica gel plug; 72, top contact block; 8, flushing pipe assembly; 81, mounting post; 82, mounting block; 9, pipe sealing assembly; 91, chute post; 92, slider; 93, moving block; 94, connecting plate; 95, second silica gel plug. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figures 1 - 9, the present invention provides a technical solution: a high-stability needleless infusion connector, including a first tube 1. The right side of the first tube 1 is connected through to a second tube 2. The second tube 2 is threadedly connected to an end cap 6. A sealing assembly 7 is provided inside the first tube 1. The sealing assembly 7 includes a first silicone plug 71. The first silicone plug 71 is slidably arranged at the top of the inner cavity of the first tube 1. A top contact block 72 is arranged below the first silicone plug 71. The top contact block 72 is fixed in the inner cavity of the first tube 1. "Cross" cracks are opened at the upper and lower ends of the first silicone plug 71. The convex column at the center position of the top contact block 72 is designed as a conical structure. The "cross" cracks of the first silicone plug 71 facilitate the insertion of the conical structure convex column of the top contact block 72. Liquid guiding hole grooves are opened on both the lower side of the top contact block 72 and the convex column. The lower section of the first silicone plug 71 is designed as a corrugated pipe structure. The corrugated pipe structure of the first silicone plug 71 is used to facilitate the deformation and contraction of the first silicone plug 71. The left side of the first tube 1 is connected through to a third tube 3. A partition 31 is fixed inside the third tube 3. The inner cavity of the third tube 3 is divided into upper and lower two chambers by the partition 31. A liquid inlet hole is opened at a position deviating from the center of the partition 31. The connection position of the third tube 3 and the first tube 1 is higher than the connection position of the second tube 2 and the first tube 1. A top cover 32 is installed at the top of the third tube 3. A flushing assembly 8 is arranged between the bottom of the inner side of the third tube 3 and the partition 31. The flushing assembly 8 includes a mounting post 81. The mounting post 81 is rotatably installed between the bottom of the third tube 3 and the central opening of the partition 31. A mounting block 82 is fixed in the outer groove of the mounting post 81. A plurality of grooves are opened at equal angles on the outer side of the mounting post 81. The mounting block 82 is designed as an inclined surface structure. The inclined surface structure of the mounting block 82 is used to be abutted and slid when liquid flows. The mounting block 82 is in sealed sliding between the third tube 3 and the partition 31. The flushing assembly 8 is used for pulsed flushing. A sealing tube assembly 9 is arranged between the flushing assembly 8 and the top cover 32. The sealing tube assembly 9 is used for positive pressure sealing of the tube;

[0029] When pulsed flushing of the pipeline is required after the infusion liquid is finished, insert the port of the sealing liquid syringe into the second silicone plug 95 and continuously inject the sealing liquid. The sealing liquid passes through the second silicone plug 95, the openings 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. When the mounting post 81 drives the sealing liquid between the plurality of mounting blocks 82 to flow into the first tube 1 in sequence, a pressure difference appears between the liquids fed in front and behind. When the rear sealing liquid flows, a vortex is generated to flush the medicinal liquid attached to the first tube 1, the second tube 2 and the pipeline into the body.

[0030] Embodiment Two

[0031] On the basis of Embodiment One, please refer to Figures 1 - 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 pulse flushing and positive pressure tube sealing are required after the infusion or injection is completed, the operator inserts the port of the tube sealing liquid syringe into the second silicone plug 95 and continuously injects the tube sealing liquid. During this process, the tube sealing liquid passes through the ports on both sides below the second silicone plug 95, the openings on the moving block 93, and the liquid inlet holes of the partition plate 31, and finally flows into the cavity between the two mounting blocks 82 below the partition plate 31. The mounting block 82 drives the mounting column 81 to rotate. The rotation of the mounting column 81 causes the tube sealing liquid between the two mounting blocks 82 to move to the connection where the third tube 3 communicates with the first tube 1, then flows into the first tube 1, the third tube 3, and the hose connected to the lower end of the first tube 1, and finally flows into the human body through the needle. During the above process, when the mounting column 81 drives the tube sealing liquid between multiple mounting blocks 82 to flow into the first tube 1, due to the intermittent feeding of the tube sealing liquid in sequence, a pressure difference appears between the previously fed liquid and the subsequently fed liquid. When the rear tube sealing liquid flows, a vortex is generated, flushing the medicinal liquid attached to the first tube 1, the second tube 2, and the pipeline into the body;

[0035] During the above process, when the mounting column 81 rotates, it simultaneously drives the sliding groove column 91 to rotate synchronously. When the sliding groove column 91 rotates, the position of the spiral groove on the outside changes, causing the slider 92 to drive 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 ports on both sides 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 second tube 2, then press the moving block 93 to make the slider 92 drive the mounting column 81 to rotate and reset. After the reset is completed, screw the end cap 6 back to facilitate subsequent flushing.

[0036] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 to the present invention. In addition, the terms "first", "second", "third", etc. 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 "coupled" 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 those of ordinary skill in the art, 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 foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall 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 the No. 2 pipe (2) is threadedly connected to an end cap (6), 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 liquid inlet hole is provided at a position offset from the center of the partition (31), wherein a flushing pipe assembly (8) is provided 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 the central opening of the partition (31), wherein a mounting block (82) is fixed in a groove on the outer side of the mounting column (81), wherein the flushing pipe assembly (8) is used for pulse flushing, wherein a plurality of grooves are provided on the outer side of the mounting column (81) at equal angles; A tube sealing assembly (9), the tube sealing assembly (9) being arranged between the flushing assembly (8) and the top cover (32), the tube sealing assembly (9) being used for positive pressure tube sealing, the tube sealing assembly (9) comprising a slide groove column (91), the slide groove column (91) being installed on the top of the mounting column (81), a slider (92) being slidably arranged in a spiral slide groove outside the slide groove column (91), the outer end of the slider (92) being fixed on the inner side of a moving block (93), the lower side of the outer end of the moving block (93) being connected to a connecting plate (94), the upper end of the connecting plate (94) being installed with a second silicone plug (91) 5), 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 top cover (32), the moving block (93) vertically slides in the polygonal opening of the top cover (32), 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, and the circular opening provided on the connecting plate (94) corresponds to the liquid inlet hole of the partition plate (31).

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), and 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).

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 mounting block (82) is designed as an inclined surface structure. The inclined surface structure of the mounting block (82) is used for sliding against the flow of liquid. The mounting block (82) slides in a sealed manner 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).

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