Double-clamp-spring locking structure, pipeline connecting device and disassembling and assembling method

Abstract

The invention relates to a double-clamp-spring locking structure, a pipeline connecting device and a dismounting and mounting method.The double-clamp-spring locking structure comprises a pipe fitting, the pipe fitting is provided with a plurality of connectors which are communicated with one another, each connector is correspondingly connected with a pipeline, the outer wall of each pipeline is provided with a clamping groove A, each clamping groove A is provided with a clamp spring A, and the inner wall of each connector is provided with a limiting groove and a clamping groove B; the clamping groove A is provided with a clamping spring A, the limiting groove limits the clamping spring A to move inwards, the clamping groove B is provided with a clamping spring B, the clamping spring B limits the clamping spring A to move outwards, the pipe fitting is provided with a set screw, and the set screw locks the pipeline. The pipeline connecting device comprises the double-clamp-spring locking structure, a sealing groove is formed in the inner wall of the connector, a sealing ring is arranged on the sealing groove, and the sealing ring is used for sealing under the action of liquid. An existing single-clamp-spring design thought is overturned, a double-clamp-spring locking structure is innovatively designed, pipeline locking connection can be achieved only through one screw in cooperation with the double-clamp-spring locking structure, and the double-clamp-spring locking structure has the advantages of being reasonable in structural design, high in machining efficiency, convenient and efficient to install, reliable in locking and the like.

Description

Technical field:

[0001] The invention relates to the technical field of pipeline connection, and in particular to a double-circlip locking structure, a pipeline connection device and a disassembly and assembly method. Background technology:

[0002] Pipeline connection is often required during pipeline construction. In practical applications, it is usually necessary to use pipe fittings to connect two pipes in series. In order to ensure the sealing and reliability of the connection, it is necessary to design a sealing structure and a locking structure between the pipe fitting and the pipe. In view of the locking structure, the prior art discloses a self-sealing pipe connection device (application publication number: CN118128983A). The document discloses a locking mechanism, which has a structure in which a groove A is designed on the inner wall of the pipe fitting and a groove B is designed on the outer wall of the pipe. A plurality of screws are arranged on the pipe fitting corresponding to the position of the groove A. A retaining ring is first installed in the groove A. After the pipe is inserted into the pipe fitting, a part of the retaining ring in the groove A is pushed into the groove B by the screw, thereby realizing that a part of the retaining ring is in the groove A and the other part is in the groove B, thereby realizing the locking of the pipe fitting and the pipe. Compared with the previous threaded locking, the locking structure has the advantages of easy disassembly and assembly, flexible installation and relatively low processing cost. However, with the implementation and promotion of this technology, it is found that there are still areas that need further improvement. Since the above-mentioned locking structure needs to push a part of the retaining ring into the retaining groove B, it is necessary to provide multiple threaded holes on the pipe fitting at intervals along the circumferential direction, and install a screw on each threaded hole. In order to ensure the insertion effect of the retaining ring, 4 screws are usually required to be installed. Although there is no technical difficulty in the processing of threaded holes, it is time-consuming and laborious compared to processing circumferential grooves on pipe fittings, especially when processing multiple threaded holes at intervals in the circumferential direction, the position of the pipe fitting needs to be adjusted, which increases the overall processing time and processing cost of the pipe fitting. In addition, four screws need to be installed during construction, which undoubtedly further limits the construction efficiency. Therefore, it is necessary to further optimize and improve the existing pipeline connection locking structure in order to further improve the processing efficiency and installation efficiency.

[0003] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Summary of the invention:

[0004] The purpose of the present invention is to solve the problems existing in the prior art, provide a double retaining spring locking structure, a pipeline connection device and a disassembly and assembly method, subvert the existing single retaining spring design concept, innovatively design a double retaining spring locking structure, and with the double retaining spring structure, only one screw is needed to achieve the pipeline locking connection, which has the advantages of reasonable structural design, high processing efficiency, convenient and efficient installation, and reliable locking.

[0005] The present invention achieves the above-mentioned purpose by adopting the following technical solutions:

[0006] A double retaining spring locking structure includes a pipe fitting, wherein the pipe fitting is provided with a plurality of interfaces connected to each other, each of the interfaces corresponding to a pipe, a retaining groove A is provided on the outer wall of the pipe along the circumferential direction, a retaining spring A is provided on the retaining groove A, a limiting groove is provided on the inner wall of the interface along the circumferential direction, the limiting groove limits the retaining spring A from moving inward, a retaining groove B is provided on the inner wall of the interface along the circumferential direction, and the retaining groove B is located on the outside of the retaining groove A, a retaining spring B is provided on the retaining groove B, the retaining spring B limits the retaining spring A from moving outward, a notch is provided on the retaining spring B, a threaded hole connected to the threaded hole is provided with a set screw, and the set screw passes through the notch to act on the pipe.

[0007] The pipe fitting is provided with two interfaces, three interfaces or four interfaces.

[0008] A chamfer is provided on the inner wall of the interface from the end to the card slot B.

[0009] The retaining spring A is designed to be C-shaped.

[0010] The cross section of the retaining spring A is designed to be circular, the cross section of the corresponding retaining groove A is designed to be arc-shaped, and the cross section of the limiting groove is designed to be arc-shaped.

[0011] The cross section of the clamping spring B is designed to be circular, and the corresponding cross section of the clamping slot B is designed to be arc-shaped.

[0012] The card slot B is designed to be connected with the card slot A.

[0013] The pipeline connection device includes the double retaining spring locking structure as described above, a sealing groove is provided on the inner wall of the interface along the circumferential direction, the sealing groove is located on the inner side of the limiting groove, a sealing ring is provided on the sealing groove, and the sealing ring is sealed under the action of the liquid passed into the pipeline.

[0014] The sealing ring is designed as an O-ring, the inner diameter of the O-ring is smaller than the outer diameter of the pipeline, the sealing groove includes an integrally formed limiting portion and an inclined portion, the limiting portion is located on the inner side, the inclined portion is located on the outer side, and the depth of the inclined portion gradually decreases from the inside to the outside, the limiting portion is used to prevent the O-ring from moving inward, the liquid in the pipeline drives the O-ring to move outward and the squeezing force of the O-ring is increased under the action of the inclined portion to perform sealing.

[0015] A pipeline disassembly and assembly method, comprising the pipeline connection device as described above;

[0016] The pipeline installation method includes the following steps:

[0017] S1. Install the O-ring on the sealing groove, install the retaining ring A on the retaining groove A, and put the retaining ring B on the pipe;

[0018] S2. Adjust the pipe so that the opening of the upper retaining ring A faces the threaded hole, and then insert the pipe into the interface of the pipe fitting until the retaining ring A contacts the limiting groove for limiting;

[0019] S3. Adjust the position of the retaining ring B so that the notch on it faces the threaded hole, and then install the retaining ring B on the retaining groove B under the guidance of the chamfer;

[0020] S4. Install the set screw on the threaded hole and pass it through the notch on the retaining ring B to act on the pipe to complete the pipe connection;

[0021] The pipeline disassembly method includes the following steps:

[0022] First, rotate the set screw in the opposite direction to loosen the pipe, but do not remove the set screw; secondly, use the notch on the retaining ring B to rotate it so that the notch on it is misaligned with the threaded hole; again, rotate the set screw in the forward direction to tighten it against the end of the retaining ring B and push the end out of the slot B; then, remove the retaining ring B from the slot B through the pushed-out end; finally, pull the pipe out of the interface to complete the disassembly.

[0023] The present invention adopts the above structure, which can bring the following beneficial effects:

[0024] (1) Subvert the existing single-circlip locking design concept, and innovatively design a double-circlip locking structure. Install the circlip A on the pipe to limit the circlip A, then design a limit groove on the pipe fitting to limit the inner side of the circlip A, and design the slot B and circlip B on the pipe fitting to limit the outer side of the circlip A, thereby achieving axial limit of the pipe without threaded connection, and convenient disassembly and assembly, and firm and reliable limit; (2) In order to prevent the pipe from rotating, a set screw is designed to lock the pipe, so that only one threaded hole is required for the entire locking structure, thereby significantly reducing processing costs and improving processing efficiency and disassembly and assembly efficiency. (3) The set screw cooperates with the notch on the circlip B, which can not only lock the pipe, but also help to quickly remove the circlip B from the slot B during disassembly, further improving disassembly efficiency. Description of the drawings:

[0025] Figure 1 It is a cross-sectional view of the double-circlip locking structure of the present invention;

[0026] Figure 2 It is a front view of the double-circlip locking structure of the present invention;

[0027] Figure 3 for Figure 2 AA section view in the figure;

[0028] Figure 4 A top view of the double-circlip locking structure of the present invention;

[0029] Figure 5 for Figure 4 BB section view in the figure;

[0030] Figure 6 It is a structural schematic diagram of the pipe fitting of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the pipeline of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the retaining spring A of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the retaining spring B of the present invention;

[0034] Fig.10 is a cross-sectional view of the pipeline connecting device of the present invention;

[0035] Fig.11 It is a schematic diagram of the pipe fitting structure in the pipe connection device of the present invention;

[0036] Fig.12 is a three-dimensional diagram of the pipeline connection device of the present invention;

[0037] Fig.13 An exploded view of the pipeline connection device of the present invention;

[0038] Fig.14 This is a schematic diagram of the structure of a pipeline connection device in which two interfaces are arranged at an angle of 180°;

[0039] Fig.15 This is a schematic diagram of the structure of a pipe connection device using two interfaces arranged at 90 degrees in the present invention;

[0040] Fig.16 This is a schematic diagram of the structure of a pipeline connection device using three interfaces of the present invention;

[0041] Fig.17 This is a schematic diagram of the structure of a pipeline connection device using four interfaces of the present invention;

[0042] Fig.18 It is a structural schematic diagram of the pipeline installation of the present invention;

[0043] Fig.19 It is a structural schematic diagram of pipeline disassembly of the present invention;

[0044] In the figure, 1, pipe fitting, 2, interface, 3, pipeline, 4, slot A, 5, retaining ring A, 6, limiting groove, 7, chamfer, 8, slot B, 9, retaining ring B, 10, notch, 11, threaded hole, 12, set screw, 13, sealing groove, 1301, limiting part, 1302, inclined part, 14, sealing ring, 15, end. Specific implementation method:

[0045] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0047] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0048] Furthermore, the terms “inner”, “outer”, “radial”, “axial”, etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the position of the indicated technical features.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "provided with", "set", "connected" and the like 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; 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.

[0050] like Figure 1-19As shown, a double retaining spring locking structure includes a pipe fitting 1, wherein the pipe fitting 1 is provided with a plurality of interfaces 2 that are interconnected, and each of the interfaces 2 is connected to a pipe 3. A retaining groove A4 is provided on the outer wall of the pipe 3 along the circumferential direction, and a retaining spring A5 is provided on the retaining groove A4. A limiting groove 6 is provided on the inner wall of the interface 2 along the circumferential direction, and the limiting groove 6 limits the retaining spring A5 from moving inward. A retaining groove B8 is provided on the inner wall of the interface 2 along the circumferential direction, and the retaining groove B8 is located outside the retaining groove A4. A retaining spring B9 is provided on the retaining groove B8, and the retaining spring B9 limits the retaining spring A5 from moving outward. A notch 10 is provided on the retaining spring B9. A threaded hole 11 that is connected to the threaded hole B8 is provided on the pipe fitting 1, and a set screw 12 is provided on the threaded hole 11, and the set screw 12 passes through the notch 10 to act on the pipe 3. The technical solution of this application overturns the existing single-circlip locking design concept, and innovatively designs a double-circlip locking structure. The circlip A5 is installed on the pipe 3 to limit the pipe 3 by only limiting the circlip A5, and then the limiting groove 6 is designed on the pipe fitting 1 to limit the inner side of the circlip A5. The outer side of the circlip A5 is limited by designing the groove B8 and the circlip B9 on the pipe fitting 1, and the axial limit of the pipe 3 can be achieved without threaded connection, and it is easy to disassemble and assemble, and the limit is firm and reliable; in order to prevent the pipe 3 from rotating, a set screw 12 is designed to lock the pipe 3, and only one threaded hole 11 is required to realize the entire locking structure, thereby significantly reducing the processing cost and improving the processing efficiency and disassembly efficiency. The set screw 12 cooperates with the notch 10 on the circlip B9, which can not only lock the pipe 3, but also help to quickly remove the circlip B9 from the groove B8 during disassembly, further improving the disassembly efficiency.

[0051] The pipe 1 is provided with two interfaces 2 (such as Fig.14 and 15 as shown) or three interfaces 2 (as Fig.16 as shown) or four interfaces 2 (as Fig.17 When two interfaces 2 are designed on the pipe fitting, a two-way connection (also called a two-way pipe fitting or a two-way joint) is realized; when three interfaces 3 are designed on the pipe fitting, a three-way connection (also called a three-way pipe fitting or a three-way joint) is realized; when four interfaces 2 are designed on the pipe fitting, a four-way connection (also called a four-way pipe fitting or a four-way joint) is realized.

[0052] A chamfer 7 is provided on the inner wall of the interface 2 from the end to the clamping groove B8 to facilitate guiding the clamping spring B9 into the clamping groove B8.

[0053] The retaining spring A5 is designed to be C-shaped. Designing the retaining spring A5 to be C-shaped allows the retaining spring A5 to be directly clamped into the slot A4 by force without the aid of auxiliary tools, which improves installation efficiency. The central angle of the retaining spring A5 here is designed to be 180° to 300°. It should be noted that the larger the central angle, the more difficult it is to clamp the retaining spring A5 into the slot A4 by force, and of course the clamping is more secure; therefore, in actual applications, the design of the central angle needs to take into account both the convenience of clamping and the firmness of the clamping. For reference, the central angle of the retaining spring A5 can be designed to be 225°.

[0054] The cross section of the clamping spring A5 is designed to be circular, the cross section of the corresponding clamping groove A4 is designed to be arc-shaped, and the cross section of the limiting groove 6 is designed to be arc-shaped.

[0055] The cross section of the retaining spring B9 is designed to be circular, and the corresponding cross section of the retaining groove B8 is designed to be arc-shaped.

[0056] The card slot B8 is connected to the card slot A4 and adopts a circular and arc design, which has the advantages of easy disassembly and assembly, while also taking into account the firmness of the card connection.

[0057] The pipeline connecting device includes the double spring locking structure as described above, and a sealing groove 13 is provided on the inner wall of the interface 2 along the circumferential direction. The sealing groove 13 is located on the inner side of the limiting groove 6. A sealing ring 14 is provided on the sealing groove 13, and the sealing ring 14 is sealed under the action of the liquid passed into the pipeline 3.

[0058] The sealing ring 14 is designed as an O-type sealing ring, the inner diameter of which is smaller than the outer diameter of the pipe 3, the sealing groove 13 includes an integrally formed limiting portion 1301 and an inclined portion 1302, the limiting portion 1301 is located on the inner side, the inclined portion 1302 is located on the outer side, and the depth of the inclined portion 1302 gradually decreases from the inside to the outside, the limiting portion 1301 is used to prevent the O-type sealing ring from moving inward, the liquid in the pipe 3 drives the O-type sealing ring to move outward and increases the squeezing force of the O-type sealing ring to seal under the action of the inclined portion 1302. The liquid introduced into the pipe 3 is used as the driving force for driving the sealing ring 14 to seal, and cooperates with the inclined portion on the sealing groove 13 to squeeze and seal the sealing ring, that is, to achieve self-sealing of the pipe; the sealing structure is not only simple and practical, with good sealing effect, but also easy to disassemble and assemble, and has low cost.

[0059] A pipeline disassembly and assembly method, comprising the pipeline connection device as described above;

[0060] like Fig.18 As shown, the pipeline installation method includes the following steps:

[0061] S1. Install the O-ring on the sealing groove 13, install the retaining ring A5 on the retaining groove A4, and put the retaining ring B9 on the pipe 3;

[0062] S2, adjust the pipe 3 so that the opening of the upper retaining ring A5 faces the threaded hole 11, and insert the pipe 3 into the interface 2 of the pipe fitting 1 until the retaining ring A5 contacts the limiting groove 6 for limiting;

[0063] S3, adjust the position of the retaining ring B9 so that the notch 10 on it faces the threaded hole 11, and then install the retaining ring B9 on the retaining groove B8 under the guidance of the chamfer 7;

[0064] S4. Install the set screw 12 on the threaded hole 11 and pass it through the notch 10 on the retaining ring B9 to act on the pipe 3 to lock the pipe, thus completing the connection of the pipe 3. After the liquid (usually water) is introduced into the pipe 3, the liquid is pressurized, and the O-ring is driven to move outward under the action of the liquid. Under the joint action of the pipe 3 and the inclined portion 1302 on the sealing groove 13, the O-ring is squeezed (the more the O-ring moves outward, the greater the squeezing force, and the better the sealing effect), thereby squeezing and sealing the gap between the pipe fitting 1 and the pipe 2.

[0065] like Fig.19 As shown, the pipeline disassembly method includes the following steps:

[0066] First, rotate the set screw 12 in the opposite direction to loosen the pipe 3, but do not remove the set screw 12; secondly, use the notch 10 on the retaining ring B9 to rotate it (you can use a simple tool such as a screwdriver or hook to do it) so that the notch 10 on it is misaligned with the threaded hole 11; rotate the set screw 12 forward again to tighten it against the end 15 of the retaining ring B9 and push the end 15 out of the slot B8; then remove the retaining ring B9 from the slot B8 through the pushed-out end 15 (specifically, you can use a screwdriver to act on the pushed-out end 15 to pick out the retaining ring B; or use pliers to pinch the pushed-out end and pull it out); finally, pull the pipe 3 out of the interface 2 to complete the disassembly. Based on the pipeline self-sealing structure and double retaining ring locking structure of the present application, the pipeline connection and disassembly operations are simpler, the connection and disassembly efficiency is higher, and it helps to improve the processing efficiency of the pipe fittings 1 and the pipe 3 and reduce the processing cost. After the pipeline is connected, the sealing effect and the locking effect are good.

[0067] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0068] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A double-circlip locking structure, comprising a pipe fitting, wherein the pipe fitting is provided with a plurality of interfaces interconnected with each other, each of the interfaces corresponding to a pipeline, characterized in that: A groove A is provided on the outer wall of the pipe along the circumferential direction, and a retaining spring A is provided on the groove A. A limiting groove is provided on the inner wall of the interface along the circumferential direction, and the limiting groove limits the retaining spring A from moving inward. A groove B is provided on the inner wall of the interface along the circumferential direction, and the groove B is located on the outside of the groove A. A retaining spring B is provided on the groove B, and the retaining spring B limits the retaining spring A from moving outward. A notch is provided on the retaining spring B. A threaded hole connected with the groove B is provided on the pipe fitting, and a set screw is provided on the threaded hole, and the set screw passes through the notch to act on the pipe.

2. The double-circlip locking structure according to claim 1, characterized in that: The pipe fitting is provided with two interfaces, three interfaces or four interfaces.

3. The double-circlip locking structure according to claim 1 or 2, characterized in that: A chamfer is provided on the inner wall of the interface from the end to the card slot B.

4. The double-circlip locking structure according to claim 3, characterized in that: The retaining spring A is designed to be C-shaped.

5. The double-circlip locking structure according to claim 4, characterized in that: The cross section of the retaining spring A is designed to be circular, the cross section of the corresponding retaining groove A is designed to be arc-shaped, and the cross section of the limiting groove is designed to be arc-shaped.

6. The double-circlip locking structure according to claim 5, characterized in that: The cross section of the clamping spring B is designed to be circular, and the corresponding cross section of the clamping slot B is designed to be arc-shaped.

7. The double-circlip locking structure according to claim 6, characterized in that: The card slot B is designed to be connected to the card slot A.

8. A pipe connection device, comprising the double spring locking structure according to any one of claims 1 to 7, characterized in that: A sealing groove is provided on the inner wall of the interface along the circumferential direction, the sealing groove is located on the inner side of the limiting groove, a sealing ring is provided on the sealing groove, and the sealing ring performs sealing under the action of the liquid introduced into the pipeline.

9. The pipeline connection device according to claim 8, characterized in that: The sealing ring is designed as an O-ring, the inner diameter of the O-ring is smaller than the outer diameter of the pipeline, the sealing groove includes an integrally formed limiting portion and an inclined portion, the limiting portion is located on the inner side, the inclined portion is located on the outer side, and the depth of the inclined portion gradually decreases from the inside to the outside, the limiting portion is used to prevent the O-ring from moving inward, the liquid in the pipeline drives the O-ring to move outward and the squeezing force of the O-ring is increased under the action of the inclined portion to perform sealing.

10. A pipeline disassembly and assembly method, characterized in that: The pipe connecting device comprises the pipe connecting device according to claim 9; The pipeline installation method includes the following steps: S1. Install the O-ring on the sealing groove, install the retaining ring A on the retaining groove A, and put the retaining ring B on the pipe; S2. Adjust the pipe so that the opening of the upper retaining ring A faces the threaded hole, and then insert the pipe into the interface of the pipe fitting until the retaining ring A contacts the limiting groove for limiting; S3. Adjust the position of the retaining ring B so that the notch on it faces the threaded hole, and then install the retaining ring B on the retaining groove B under the guidance of the chamfer; S4. Install the set screw on the threaded hole and pass it through the notch on the retaining ring B to act on the pipe to complete the pipe connection; The pipeline disassembly method includes the following steps: First, rotate the set screw in the opposite direction to loosen the pipe, but do not remove the set screw; secondly, use the notch on the retaining ring B to rotate it so that the notch on it is misaligned with the threaded hole; again, rotate the set screw in the forward direction to tighten it against the end of the retaining ring B and push the end out of the slot B; then, remove the retaining ring B from the slot B through the pushed-out end; finally, pull the pipe out of the interface to complete the disassembly.

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