Narrow space intubation structure

Abstract

The utility model provides a narrow space pipe inserting structure, and belongs to the technical field of pipeline connecting tools. The narrow space intubation structure comprises a main body and an insertion sleeve arranged at one end of the main body, the front end of the insertion sleeve has a taper facilitating entering of a connector to be bonded, the aperture of an inner hole of the insertion sleeve is gradually reduced from back to front, the minimum aperture of the inner hole is smaller than the outer diameter of a catheter, and a through opening is formed in the side portion of the insertion sleeve. The width of the opening is gradually increased from front to back, and the minimum width of the opening is smaller than the outer diameter of the catheter. According to the utility model, the space required for manually operating the intubation tube is saved, and more space is reserved for the structural design of related products while the operation difficulty is simplified and the yield is improved; the adhesive can be used for bonding the elastic guide pipe with large interference and the connector, and the tensile strength of the bonding structure can be improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipeline connection tools, and relates to a tube insertion structure in narrow spaces. Background Technology

[0002] In blood purification consumables, many tubing lines are connected via connectors. However, due to limitations in product function and molding methods, the space reserved for manual bonding during production is extremely small, leading to processing difficulties and a high scrap rate. To address this problem, existing technologies offer the following solutions: 1. Use a large amount of adhesive to fully lubricate or slightly corrode the tubing; 2. Increase the diameter of the connectors and interfaces that need to be bonded to the tubing; 3. For interfaces with other structures requiring bonding, increase the reserved operating space to facilitate angle adjustment and force application.

[0003] However, the existing technology has the following problems: 1. The amount of adhesive used is easy to exceed the standard. Among them, the most commonly used adhesive, cyclohexanone (C6H10O), may cause the reducing substances in the finished product to exceed the standard; 2. Insufficient interference fit between the conduit and the connector may reduce the bonding strength of the pipeline and increase the risk of accidental detachment of the connector; 3. Increasing the operating space reserved for bonding may reduce the space of other structures related to the product function and reduce their mechanical strength. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a narrow-space cannulation structure that saves space required for manual cannulation.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A narrow space cannulation structure includes a main body and a connector sleeve disposed at one end of the main body. The front end of the connector sleeve has a taper to facilitate the insertion of the connector to be bonded. The inner diameter of the connector sleeve gradually decreases from back to front, and the minimum diameter of the inner hole is smaller than the outer diameter of the catheter. The side of the connector sleeve has a through opening, and the width of the opening gradually increases from front to back, and the minimum width of the opening is smaller than the outer diameter of the catheter.

[0007] In use, insert the conduit coated with an appropriate amount of adhesive into the spigot from back to front, and clamp the conduit through the smallest part of the inner hole. Then, operate the main body to allow the front end of the spigot to enter the joint to be bonded, so that the conduit and the joint to be bonded are bonded. Afterwards, operate the main body to remove the spigot from the joint to be bonded, and the elastic conduit will detach from the spigot through the opening.

[0008] The front end of the plug sleeve has a sufficiently thin wall thickness; the outer diameter of the rear end of the plug sleeve is larger than the diameter of the connector to be bonded, preventing the plug sleeve from completely entering the connector; the maximum width of the opening is larger than the outer diameter of the conduit, facilitating the removal of the conduit from the plug sleeve. The plug sleeve is made of a material that is not bonded by adhesive. When bonding the conduit, a volatile adhesive is applied to the front end of the conduit. As the bonding process proceeds, the conduit is bonded to the inner wall of the connector by the adhesive, while the plug sleeve, being not bonded by adhesive, can be removed.

[0009] In the above-mentioned narrow space cannulation structure, the insertion sleeve includes a superior arc segment at the front and a guide segment at the rear. The outer diameter of the superior arc segment gradually increases from front to back and the circumferential span of its front end is greater than 180°. The guide segment gradually expands outward from front to back, and the inner surface of the guide segment smoothly transitions with the inner surface of the superior arc segment.

[0010] The inlet section gradually expands outwards from front to back to facilitate cannula insertion; to facilitate catheter removal, the circumferential span at the rear end of the inlet section is less than 180°. The minimum width of the opening is located at the front end of the dominant arc section, and the maximum width of the opening is located at the rear end of the inlet section.

[0011] In the above-mentioned narrow space insertion structure, one end of the main body is rotatably connected to a U-shaped piece by bolts and locking nuts, and the insertion sleeve is connected to the U-shaped piece.

[0012] The angle of the U-shaped piece relative to the main body can be adjusted, thereby adjusting the angle of the connector sleeve relative to the main body. Adjustment is simple: loosen the lock nut, rotate the U-shaped piece around the bolt to the desired position, and then tighten the lock nut. Adjustment is convenient.

[0013] In the aforementioned narrow space cannulation structure, a strip-shaped groove extending along its length is provided on the main body, and the bolt passes through the strip-shaped groove.

[0014] When the bolt is loosened, its position can slide along the contour of the strip groove; when tightened, the relative distance and angle between the plug sleeve connected to the U-shaped piece and the main body can be adjusted.

[0015] In the aforementioned narrow-space insertion structure, the insertion sleeve is provided with a connection hole opposite to the opening. This connection hole facilitates the connection of the insertion sleeve to the U-shaped piece.

[0016] The extension direction of the plug sleeve is perpendicular to the extension direction of the bolt. A threaded hole is provided at the end of the U-shaped piece. The plug sleeve is connected to the threaded hole by a screw that passes through the connection hole.

[0017] In the above-mentioned narrow space insertion structure, the end of the main body away from the insertion sleeve is rotatably connected to a bracket, and the end of the bracket away from the main body is provided with a locking part.

[0018] The locking mechanism allows for the positioning of the bracket, main body, and plug-in sleeve.

[0019] In the above-mentioned narrow space cannulation structure, the support is rotatably mounted on the main body via a hinge shaft, and the extension direction of the hinge shaft is perpendicular to the extension direction of the insertion sleeve.

[0020] In addition to using hinge shafts, hinges, bolts, and other connecting components can also be used.

[0021] In the aforementioned narrow-space cannulation structure, a spring clip is provided on the side of the main body facing the support. The spring clip separates the closed main body from the support.

[0022] During assembly, the bracket is connected to the main body via a hinge shaft, the spring is fixed to the main body with screws, the U-shaped piece is connected to the main body with bolts, and the plug sleeve is fixed to the U-shaped piece with screws.

[0023] In use, first insert the conduit coated with an appropriate amount of adhesive into the insertion sleeve. The conduit slides through the inlet section of the insertion sleeve and, with the lubrication of the adhesive, to the superior arc section of the insertion sleeve. Then, the locking part of the bracket is locked onto the joint or structural component to be bonded. Press the main body to allow the insertion sleeve to enter the joint to be bonded, which is held by the bracket. After the conduit is bonded inside the joint, hold the bracket and release the main body. Under the action of the spring clip, the insertion sleeve is removed from the joint to be bonded, thus completing the insertion of the conduit in a narrow space.

[0024] During this process, the superior arc segment of the connector sleeve has a certain taper, and the conduit has a certain degree of elasticity. Therefore, the conduit can move in the direction of the superior arc segment within the connector sleeve but cannot move in the direction of the guide segment. Furthermore, because a volatile adhesive is applied to the end of the conduit during bonding, the conduit will be bonded to the inner wall of the connector to be bonded as the bonding process progresses. The connector sleeve, made of a material that is not bonded by adhesive, can then be removed.

[0025] Compared with existing technologies, this narrow-space cannulation structure has the following advantages:

[0026] The insert sleeve, by combining the superior arc segment and the inlet segment, enables unidirectional movement of the catheter within this structure. It can only move from the inlet segment to the superior arc segment, and after insertion, it can exit from the opening of the superior arc segment. This allows the insert sleeve to "grip," "insert," and "release" according to the needs of tubing bonding. The insertion method of the insert sleeve, main body, and support allows for tubing bonding in specific narrow spaces, leaving more space for structural design to enhance structural strength and add other product functions. By installing and adjusting the position of the U-shaped piece, the distance and angle between the insert sleeve and the main body can be adjusted. Combined with the support, positioning is achieved. After positioning, applying appropriate pressure to the main body achieves a firm bond in specific narrow spaces. Furthermore, by changing the insert sleeve, convenient bonding of catheters of different sizes can be achieved. This saves space required for manual insertion, simplifying operation, increasing yield, and leaving more space for related product structural design. It can be used for bonding elastic catheters and connectors with large interference fits, improving the tensile strength of the bonded structure. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the narrow space cannulation structure provided by this utility model.

[0028] Figure 2 This is an exploded view of the narrow space cannulation structure provided by this utility model.

[0029] Figure 3 This is a schematic diagram of the plug sleeve provided by this utility model.

[0030] Figure 4 This is a schematic diagram of the cannulation structure in operation in a narrow space.

[0031] Figure 5 This is a cross-sectional view of a cannulation procedure performed in a narrow space.

[0032] In the figure, 1 is the main body; 11 is the strip groove; 2 is the plug sleeve; 20 is the opening; 21 is the curved section; 22 is the guide section; 23 is the connecting hole; 3 is the U-shaped piece; 4 is the bracket; 41 is the locking part; 5 is the spring piece; a is the joint to be bonded; b is the conduit. Detailed Implementation

[0033] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0034] like Figure 1 and Figure 2The narrow space insertion structure shown includes a main body 1 and a bracket 4 hinged to one end of the main body 1. The bracket 4 is rotatably mounted on the main body 1 via a hinge shaft, hinge, or bolt. The end of the bracket 4 away from the main body 1 is provided with a locking part 41. In this embodiment, the locking part 41 is Y-shaped, which facilitates its mounting on the joint a to be bonded.

[0035] To facilitate the separation of the assembled main body 1 from the support 4, such as Figure 1 and Figure 2 As shown, a spring piece 5 is provided on the side of the main body 1 facing the bracket 4, and the spring piece 5 is fixed by screws.

[0036] like Figure 1 and Figure 2 As shown, a U-shaped piece 3 is rotatably connected to the end of the main body 1 away from the bracket 4 via bolts and a locking nut. The rotation centerline of the U-shaped piece 3 is parallel to the rotation centerline of the bracket 4 relative to the main body 1. A plug-in sleeve 2 is provided at the end of the U-shaped piece 3 away from the main body 1, and the plug-in sleeve 2 has a connecting hole 23. The plug-in sleeve 2 is threadedly connected to the U-shaped piece 3 via a screw passing through the connecting hole 23. The angle of the U-shaped piece 3 relative to the main body 1 can be adjusted, thereby achieving the purpose of adjusting the angle of the plug-in sleeve 2 relative to the main body 1. Adjustment is simple: just loosen the locking nut, rotate the U-shaped piece 3 around the bolt to the appropriate position, and then tighten the locking nut.

[0037] Furthermore, such as Figure 2 As shown, the main body 1 has a strip groove 11 extending along its length, and the bolt passes through the strip groove 11. When the bolt is loosened, its position can slide along the contour of the strip groove 11, and when it is tightened, the relative distance and angle between the plug sleeve 2 connected to the U-shaped piece 3 and the main body 1 can be adjusted.

[0038] like Figure 3 As shown, the front end of the plug sleeve 2 has a taper that facilitates entry into the connector a to be bonded. The inner diameter of the plug sleeve 2 gradually decreases from back to front, and the minimum diameter of the inner hole is smaller than the outer diameter of the conduit b. The side of the plug sleeve 2 has a through opening 20, which is opposite to the connecting hole 23. The width of the opening 20 gradually increases from front to back, and the minimum width of the opening 20 is smaller than the outer diameter of the conduit b.

[0039] The wall thickness of the front end of the plug sleeve 2 is sufficiently thin; the outer diameter of the rear end of the plug sleeve 2 is larger than the diameter of the connector a to be bonded, preventing the plug sleeve 2 from completely entering the connector a; the maximum width of the opening 20 is larger than the outer diameter of the conduit b, facilitating the removal of the conduit b from the plug sleeve 2. The plug sleeve 2 is made of a material that is not bonded by adhesive. When bonding the conduit b, a volatile adhesive is applied to the front end of the conduit b. As the bonding process proceeds, the conduit b is bonded to the inner wall of the connector a by the adhesive, while the plug sleeve 2, being not bonded by adhesive, can be removed.

[0040] like Figure 3 As shown, the insertion sleeve 2 includes a front-end curved section 21 and a rear-end guiding section 22. The outer diameter of the curved section 21 gradually increases from front to back, and the circumferential span of its front end is greater than 180°. The guiding section 22 gradually expands outward from front to back, and the inner surface of the guiding section 22 smoothly transitions with the inner surface of the curved section 21. The guiding section 22 expands outward from front to back to facilitate the insertion of the sleeve; to facilitate the removal of the catheter b, the circumferential span of the rear end of the guiding section 22 is less than 180°. The minimum width of the opening 20 is located at the front end of the curved section 21, and the maximum width of the opening 20 is located at the rear end of the guiding section 22.

[0041] During assembly, bracket 4 is connected to main body 1 via hinge shaft, spring piece 5 is fixed to main body 1 by screws, U-shaped piece 3 is connected to main body 1 by bolts, and plug sleeve 2 is fixed to U-shaped piece 3 by screws.

[0042] In use, first insert the conduit b, coated with an appropriate amount of adhesive, into the insertion sleeve 2. Passing through the inlet section 22 of the insertion sleeve 2, it slides to the superior arc section 21 of the insertion sleeve 2 under the lubrication of the adhesive. Figure 4 As shown, the engaging part 41 of the bracket 4 is then engaged on the joint a or structural component to be bonded, and the main body 1 is pressed down so that the insertion sleeve 2 enters the joint a to be bonded that is engaged by the bracket 4, as shown. Figure 5 As shown, after the catheter b is bonded inside the connector a, hold the support 4 and release the main body 1. Under the action of the spring piece 5, the insertion sleeve 2 is removed from the connector a, thus completing the insertion of the catheter b in the narrow space.

[0043] During this process, the superior arc segment 21 of the insertion sleeve 2 has a certain taper and the conduit b has a certain elasticity, so the conduit b can move in the direction of the superior arc segment 21 within the insertion sleeve 2 but cannot move in the direction of the guide segment 22. Furthermore, since a volatile adhesive is applied to the end of the conduit b during bonding, as the bonding process progresses, the conduit b will be bonded to the inner wall of the connector a to be bonded by the adhesive. The insertion sleeve 2, made of a material that is not bonded by adhesive, can then be removed.

[0044] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A narrow space cannulation structure, characterized by, The utility model relates to a kind of connector, including main body (1) and the plug sleeve (2) of being located in the one end of main body (1), the taper of the front end of the plug sleeve (2) has the convenience into the joint (a) to be bonded, the inner hole diameter of the plug sleeve (2) gradually decreases from back to front, the minimum hole diameter of the inner hole is less than the outer diameter of pipe (b), the side of the plug sleeve (2) has the opening (20) being arranged through, the width of the opening (20) gradually increases from front to back, the minimum width of the opening (20) is less than the outer diameter of pipe (b).

2. The narrow space intubation structure according to claim 1, characterized by, The plug sleeve (2) includes the superior arc segment (21) located in front and the lead-in segment (22) located in back, the outer diameter of the superior arc segment (21) gradually increases from front to back and the circumferential span of its front end is greater than 180 °, the lead-in segment (22) gradually spreads outwards from front to back, the inner surface of the lead-in segment (22) and the inner surface of superior arc segment (21) smoothly transition.

3. The narrow space intubation structure according to claim 1, characterized by, One end of the main body (1) is rotatably connected with U-shaped sheet (3) by bolt and lock nut, and the plug sleeve (2) is connected on the U-shaped sheet (3).

4. The narrow space intubation structure according to claim 3, characterized by A strip-shaped slot (11) extending along the length direction of the main body (1) is formed on the main body (1), and the bolt is arranged in the strip-shaped slot (11).

5. The narrow space intubation structure according to claim 1, wherein A connecting hole (23) is arranged on the plug sleeve (2) opposite to the opening (20).

6. The narrow space intubation structure according to claim 1, characterized by, A support (4) is rotatably connected to the end of the main body (1) away from the plug sleeve (2), and a clamping portion (41) is arranged on the end of the support (4) away from the main body (1).

7. The narrow space intubation structure according to claim 6, characterized by The support (4) is rotatably arranged on the main body (1) through a hinge shaft, and the extension direction of the hinge shaft is perpendicular to the extension direction of the plug sleeve (2).

8. The narrow space intubation structure according to claim 6, characterized by, A spring sheet (5) is arranged on the side of the main body (1) facing the support (4).

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