A quick coupling joint for pipes

Abstract

The utility model provides a kind of pipeline quick coupler, it solves the problem of time-consuming and laborious operation when existing pipeline connector connects.The pipeline quick coupler of the utility model, including the connector main body with internal passage, at least one end of internal passage is equipped with the clamping part with guide hole, clamping part has clamping state and loosening state, when clamping part is in loosening state, guide hole is communicated with internal passage, when clamping part is in clamping state, the liquid path component inserted into internal passage can be clamped.Taking the mutual obstruction of the annular protrusion of clamping part and liquid path component to prevent the falling of liquid path component, replace the connection mode of silica gel tube and throat hoop, convenient assembly, reduce labor intensity;Quick coupler can be used repeatedly for many times, meet the temporary connection demand frequently appeared in industry.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline connector technology and relates to a quick-connect pipeline connector. Background Technology

[0002] In the field of blood purification, temporary connections to fluid circuit components are frequently involved. For example, connections via silicone tubing to... Figure 1 When connecting the fluid circuit component 1' shown, to prevent the silicone tube 2' from falling off and to prevent the tube from bursting during stamping, a radially outward-protruding annular protrusion 11' is provided at the end of the fluid circuit component 1'. After the silicone tube 2' is fitted onto the fluid circuit component 1', it needs to be fixed with hose clamps or cable ties 3'. This has the following problems: 1. The silicone tubes 2' and hose clamps or cable ties 3' must be assembled and disassembled manually one by one, which is time-consuming and labor-intensive; 2. The hose clamps or cable ties 3' used for assembly are disposable and cannot be reused, increasing material costs. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a quick-connect pipe fitting that is convenient and easy to assemble and disassemble.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A quick-connect pipe fitting is characterized in that it includes a fitting body having an internal passage, at least one end of the internal passage is provided with a clamping member with a guide hole, the guide hole allows the end of a liquid circuit component to pass through, the clamping member has a clamped state and a loose state, when the clamping member is in the loose state the guide hole is connected to the internal passage, when the clamping member is in the clamped state it can clamp the liquid circuit component inserted into the internal passage.

[0006] This quick-connect fitting is used to connect to fluid circuit components. The fluid circuit component has an annular protrusion at its end with an outer diameter smaller than or equal to the diameter of the internal passage. During connection, the end of the fluid circuit component with the annular protrusion is inserted into the internal through-hole of the fitting body. The diameter of the guide hole is larger than the outer diameter of the annular protrusion. A locking element is slidably mounted on the fitting body along an axis not parallel to the internal passage. It is sufficient to prevent the annular protrusion on the fluid circuit component from dislodging outwards; preferably, the locking element is slidably mounted radially along the internal passage.

[0007] During connection, the clamping component is adjusted to the loose state, and the end of the fluid circuit component with the annular protrusion is inserted into the internal passage through the guide hole. Then, the clamping component is adjusted to the clamping state, and the clamping component abuts against the end face of the annular protrusion of the fluid circuit component, thereby realizing the connection between the fluid circuit component and the connector body.

[0008] In the above-mentioned quick-connect pipe fitting, the guide hole includes a guide part and a clamping part. The diameter of the guide part is larger than the outer diameter of the end of the liquid circuit component, and the outer diameter of the end of the liquid circuit component is larger than the diameter of the clamping part. When the clamping part is in the clamping state, the clamping part is connected to the internal passage. When the clamping part is in the loosened state, the guide part is connected to the internal passage.

[0009] In the above-mentioned quick-connect pipe fitting, the end of the fitting body is provided with a limiting post, and the clamping member is provided with a limiting groove extending along the sliding direction of the clamping member. The limiting post extends into the limiting groove, and when the end of the limiting groove away from the clamping part abuts against the limiting post, the clamping member is in a clamping state.

[0010] The limiting post and the limiting groove slide together. The limiting post and the limiting groove can limit the position of the clamping part, so as to prevent the edge of the clamping part from shearing the hydraulic components when the clamping part is in the clamping state, thereby damaging the hydraulic components. At the same time, it also prevents the clamping part from falling off.

[0011] In the above-mentioned quick-connect pipe fitting, the free end of the clamping member has a pressing part, and an elastic element is provided between the pressing part and the fitting body to keep the clamping member in a clamped state. The elastic force of the elastic element extends along the sliding direction of the clamping member.

[0012] The pressing part can be set at any end of the clamping part. The clamping part is controlled to slide and reset by the extension or contraction of the elastic element. When the external force acting on the clamping part disappears, the clamping part can move from the loose state to the clamping state under the elastic force of the elastic element, thus realizing self-locking.

[0013] In the above-mentioned quick-connect pipe fitting, the elastic element is a spring.

[0014] When the pressing part is located at the end of the clamping member near the guide part, the spring force after compression can move the pressing part from the loose state to the clamping state; when the pressing part is located at the end of the clamping member near the clamping part, the spring force after stretching can move the pressing part from the loose state to the clamping state.

[0015] In the above-mentioned quick-connect pipe fitting, the fitting body is provided with a radially extending groove along the internal passage, the clamping member is slidably fitted in the groove, and the end of the fitting body is also provided with a slot extending along the length direction of the groove, the width of the slot is less than the width of the groove and greater than or equal to the diameter of the guide portion.

[0016] The slot provides clearance for the insertion of hydraulic components, and the slide guides and limits the clamping parts. Together with the limiting post, elastic element and pressing part, it can prevent the clamping parts from falling off.

[0017] In the aforementioned quick-connect pipe fitting, an annular groove is provided within the internal passage, and an O-ring seal is installed within the annular groove. The annular groove axially limits the O-ring seal, preventing it from falling off. The inner diameter of the O-ring seal is smaller than the outer diameter of the end of the fluid passage component. When the fluid passage component is inserted into the internal passage, the O-ring seal is pressed between the outer surface of the fluid passage component and the inner surface of the internal passage, thus providing a seal.

[0018] In the above-mentioned quick-connect pipe fitting, the side of the fitting body is provided with a positioning hole, and one end of the elastic element extends into the positioning hole; the pressing part is provided with a positioning protrusion, and the other end of the elastic element is sleeved on the positioning protrusion.

[0019] In the aforementioned quick-connect fittings for pipelines, the shape of the connection between the guide portion and the clamping portion matches the shape of the end of the fluid circuit component. This increases the contact area between the clamping portion and the fluid circuit component, changing from a single line contact to multi-position line contact or even surface contact, thereby preventing the clamping portion from damaging the fluid circuit component.

[0020] In the above-mentioned quick-connect pipe fitting, the quick-connect pipe fitting is a two-way fitting, and the other end of the internal passage is a pipe fitting or is also provided with a clamping element.

[0021] When the other end of the internal passage is a tubing connector, the tubing connector is a commonly used medical connector, such as a Luer connector or a tubing connector with an annular protrusion.

[0022] Among the aforementioned quick-connect pipe fittings, this quick-connect pipe fitting is a multi-way fitting.

[0023] Compared with existing technologies, this quick-connect pipe fitting has the following advantages:

[0024] The system uses a locking mechanism and annular protrusions on the hydraulic components to prevent the components from falling off, and an O-ring seal is used to achieve a seal. This replaces the connection method of silicone tubing and hose clamps, making assembly convenient and reducing labor intensity. The quick-connect coupling can be reused multiple times to meet the industry's frequent temporary connection needs, effectively saving costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the connection between the fluid circuit component and the silicone tube provided in the background art.

[0026] Figure 2 This is a cross-sectional view of the quick-connect pipe fitting provided by this utility model.

[0027] Figure 3 This is a structural schematic diagram of the quick-connect pipe fitting provided by this utility model.

[0028] Figure 4 This is an exploded view of the quick-connect pipe fitting provided by this utility model.

[0029] Figure 5 A cross-sectional view of a two-way connector with locking devices at both ends.

[0030] Figure 6 A cross-sectional view of a tee fitting with a locking mechanism installed at one end.

[0031] Figure 7 A cross-sectional view of a tee connector with clamping devices at all three ends.

[0032] In the diagram, 1. Connector body; 10. Internal passage; 11. Slide groove; 12. Groove; 13. Annular groove; 14. Pipe connector; 15. Positioning hole; 2. Clamping part; 20. Clamping part; 21. Guide part; 22. Pressing part; 23. Limiting groove; 24. Positioning protrusion; 4. Spring; 5. Limiting post; 6. O-ring seal. 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 2-4 The illustrated quick-connect tubing includes a connector body 1 with an internal passage 10. The other end of the connector body 1 is a tubing connector 14, the inner bore of which communicates with the internal passage 10. The diameter of the internal passage 10 is larger than the diameter of the inner bore of the tubing connector 14. The tubing connector 14 is a commonly used medical connector, such as a Luer connector or... Figure 2 The pipe fitting 14 with an annular protrusion is shown.

[0035] like Figure 4 As shown, a groove 11 extending radially along the internal passage 10 is provided at one end of the connector body 1 away from the pipe connector 14. A plate-shaped clamping member 2 is slidably fitted in the groove 11. The clamping member 2 has a slot 12 on the pipe connector 14 on the side away from the internal passage 10. The slot 12 extends along the length direction of the groove 11, and the width of the slot 12 is smaller than the width of the groove 11.

[0036] like Figure 4 As shown, the guide hole includes a guide portion 21 and a clamping portion 20. The diameter of the guide portion 21 is larger than the outer diameter of the annular protrusion at the end of the liquid circuit component. The outer diameter of the annular protrusion at the end of the liquid circuit component is larger than the diameter of the clamping portion 20. When the clamping member 2 is in the clamping state, the clamping portion 20 is connected to the internal passage 10. When the clamping member 2 is in the loosened state, the guide portion 21 is connected to the internal passage 10.

[0037] In this embodiment, the shape of the connection between the guide portion 21 and the clamping portion 20 matches the shape of the end of the fluid passage component. This increases the contact area between the clamping portion 20 and the fluid passage component, changing from a single line contact to multiple line contacts or even surface contacts, thereby preventing the clamping portion 21 from damaging the fluid passage component.

[0038] In other embodiments, such as Figure 5 As shown, the pipe connector 14 is eliminated, and a locking element 2 is also slidably installed at the other end of the connector body, thereby greatly improving the adaptability and convenience of the entire quick-connect connector.

[0039] In this embodiment, to facilitate the sliding of the drive clamping member 2, such as Figure 2-4 As shown, a pressing part 22 is provided at the free end of the clamping member 2 near the guide part 21. The pressing part 22 extends toward the end of the connector body 1 with the pipe connector 14. An elastic element is provided between the pressing part 22 and the connector body 1 to keep the clamping member 2 in a clamped state. In this embodiment, the elastic element is a spring 4, whose elastic force extends along the sliding direction of the clamping member 2. The clamping member 2 is kept in a clamped state by the elastic force generated by the compression of the spring 4.

[0040] To prevent spring 4 from falling off, such as Figure 2 As shown, the side of the connector body 1 is provided with a positioning hole 15, one end of the spring 4 extends into the positioning hole 15, the pressing part 22 is provided with a positioning protrusion 24, and the other end of the spring 4 is sleeved on the positioning protrusion 24.

[0041] In other embodiments, a pressing part 22 is provided at one end of the clamping member 2 near the guide part 21. The pressing part 22 extends toward the end of the connector body 1 with the pipe connector 14. A spring 4 is provided between the pressing part 22 and the connector body 1 to keep the clamping member 2 in a clamped state. The clamping member 2 is kept in a clamped state by the rebound force generated by the stretching of the spring 4.

[0042] like Figure 2-4 As shown, the end of the connector body 1 is provided with a limiting post 5. The limiting post 5 is located in the slot 12 and away from the spring 4. The clamping member 2 is provided with a limiting groove 23 extending along the sliding direction of the clamping member 2. The limiting groove 23 is in communication with the clamping part 20. The limiting post 5 extends into the limiting groove 23. When the end of the limiting groove 23 away from the clamping part 20 abuts against the limiting post 5, the clamping member 2 is in a clamping state.

[0043] The limiting post 5 and the limiting groove 23 slide together. The limiting post 5 and the limiting groove 23 can limit the position of the clamping part 2, so as to prevent the edge of the clamping part 20 from shearing the fluid circuit component when the clamping part 2 is in the clamping state, thereby damaging the fluid circuit component. At the same time, it also prevents the clamping part 2 from falling off.

[0044] To improve sealing, such as Figure 2As shown, an O-ring 6 is provided inside the internal passage 10. To prevent the O-ring 6 from falling off, as... Figure 2 As shown, an annular groove 13 is provided in the internal passage 10, and an O-ring 6 is disposed in the annular groove 13. The annular groove 13 can limit the O-ring 6 axially to prevent the O-ring 6 from falling off. The inner diameter of the O-ring 6 is smaller than the outer diameter of the end of the fluid passage component with the annular protrusion.

[0045] This quick-connect fitting is used to connect to a liquid circuit component. One end of the liquid circuit component has an annular protrusion with an outer diameter less than or equal to the diameter of the internal passage 10. When connecting, the end of the liquid circuit component with the annular protrusion is inserted into the internal through hole of the fitting body 1. The diameter of the locking part 20 is smaller than the outer diameter of the annular protrusion at the end of the liquid circuit component, and the diameter of the guide part 21 is larger than the outer diameter of the annular protrusion at the end of the liquid circuit component.

[0046] When connecting, the clamping member 2 is adjusted to the loose state, and the end of the liquid circuit component with the annular protrusion is inserted into the internal passage 10 through the guide part 21. Then the clamping member 2 is adjusted to the clamping state. At this time, the end of the liquid circuit component with the annular protrusion enters the clamping part 20 through the guide part 21, and the annular protrusion is limited by the clamping member 2, so as to realize the connection between the liquid circuit component and the connector body 1.

[0047] When it is necessary to remove the fluid circuit component, press the pressing part 22 of the clamping member 2 to compress the spring 4, so that the clamping member 2 changes from the clamped state to the loose state, and the fluid circuit component can be removed randomly.

[0048] In other embodiments, the pipe joint 14 is a multi-way structure, such as a tee, cross, or five-way. A tee structure will be described in detail below, for example... Figure 6 As shown, a locking member 2 can be slidably installed at the middle end of the internal passage 10, or as shown in the figure. Figure 7 As shown, locking elements 2 are slidably installed at all three ends of the internal passage 10.

[0049] 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 quick-connect pipe fitting, characterized in that, The connector body (1) includes an internal passage (10), at least one end of which is provided with a clamping member (2) with a guide hole, the guide hole allowing the end of a liquid circuit component to pass through, the clamping member (2) having a clamped state and a released state, the guide hole communicating with the internal passage (10) when the clamping member (2) is in the released state, and the liquid circuit component inserted into the internal passage (10) being clamped when the clamping member (2) is in the clamped state.

2. The quick-connect pipe fitting according to claim 1, characterized in that, The guide hole includes a guide part (21) and a clamping part (20). The diameter of the guide part (21) is larger than the outer diameter of the end of the liquid circuit component. The outer diameter of the end of the liquid circuit component is larger than the diameter of the clamping part (20). When the clamping part (2) is in the clamping state, the clamping part (20) is connected to the internal passage (10). When the clamping part (2) is in the loosening state, the guide part (21) is connected to the internal passage (10).

3. The quick-connect pipe fitting according to claim 2, characterized in that, The end of the connector body (1) is provided with a limiting post (5), and the clamping member (2) is provided with a limiting groove (23) extending along the sliding direction of the clamping member (2). The limiting post (5) extends into the limiting groove (23). When the end of the limiting groove (23) away from the clamping part (20) abuts against the limiting post (5), the clamping member (2) is in a clamping state.

4. The quick-connect pipe fitting according to claim 1, 2, or 3, characterized in that, The free end of the clamping member (2) has a pressing part (22), and an elastic element is provided between the pressing part (22) and the connector body (1) to keep the clamping member (2) in a clamped state. The elastic force of the elastic element extends along the sliding direction of the clamping member (2).

5. The quick-connect pipe fitting according to claim 2 or 3, characterized in that, The connector body (1) is provided with a radially extending groove (11) along the internal passage (10), and the clamping member (2) is slidably fitted in the groove (11). The end of the connector body (1) is also provided with a slot (12) extending along the length direction of the groove (11). The width of the slot (12) is less than the width of the groove (11) and greater than or equal to the diameter of the guide part (21).

6. The quick-connect pipe fitting according to claim 1, 2, or 3, characterized in that, The internal passage (10) is provided with an annular groove (13), and the annular groove (13) is provided with an O-ring seal (6).

7. The quick-connect pipe fitting according to claim 4, characterized in that, The side of the connector body (1) is provided with a positioning hole (15), and one end of the elastic element extends into the positioning hole (15); the pressing part (22) is provided with a positioning protrusion (24), and the other end of the elastic element is sleeved on the positioning protrusion (24).

8. The quick-connect pipe fitting according to claim 2 or 3, characterized in that, The shape of the connection between the guide part (21) and the clamping part (20) matches the shape of the end of the fluid circuit component.

9. The quick-connect pipe fitting according to claim 1, 2, 3, or 7, characterized in that, The quick-connect pipe fitting is a two-way fitting, and the other end of the internal passage (10) is a pipe fitting (14) or is also provided with a clamping element (2).

10. The quick-connect pipe fitting according to claim 1, 2, 3, or 7, characterized in that, The quick-connect fitting for this pipeline is a multi-way fitting.

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