Self-sealing structure for large-diameter pipeline connection and connecting device

Abstract

The utility model relates to a self-sealing structure and a connecting device for connecting large-pipe-diameter pipelines, the self-sealing structure for connecting the large-pipe-diameter pipelines comprises a pipe fitting, the pipe fitting is provided with at least two communicated pipeline connectors, and the pipeline connectors are connected with the pipelines. A mounting groove is formed in the inner wall of the pipeline connector or the outer wall of the pipeline in the circumferential direction, a U-shaped sealing ring is arranged on the mounting groove, the U-shaped sealing ring is horizontally arranged, an opening of the U-shaped sealing ring faces inwards, the U-shaped sealing ring is fixed in the mounting groove through adhesive glue, the inner diameter of the U-shaped sealing ring is smaller than the outer diameter of the pipeline, and the U-shaped sealing ring is located between the pipe fitting and the pipeline for sealing. After liquid is introduced into the pipeline, the U-shaped sealing ring extends in the radial direction under the action of the liquid, and sealing is enhanced under the action of the mounting groove. The large-diameter pipeline connecting device comprises the self-sealing structure, and a connecting mechanism is arranged between the pipe fitting and the pipeline. The sealing structure is simple, practical, good in sealing effect, convenient to disassemble and assemble, firm and reliable in connection, flexible and efficient in construction and the like.

Description

Technical field:

[0001] The utility model relates to the technical field of pipeline connection, in particular to a self-sealing structure and a connecting device for connecting large-diameter pipelines. Background technology:

[0002] Pipe connection is an essential process in pipeline construction, and pipe fittings are usually used for connection. In the industry, pipes with a diameter less than 50mm are generally called small diameters, 50-100mm are called large diameters, and those above 100mm are called extra-large diameters. For extra-large diameters, pipe fittings are usually locked by threaded connections or clamp connections. For small diameters, most of them are connected by compression fittings, but there is no special design for large diameters, and they are generally connected by threaded connections or compression fittings.

[0003] Although the existing connection methods can meet the connection needs of large-diameter pipelines to a certain extent, they still face many problems in practical applications. First, although the threaded connection has the advantages of firm and reliable connection, the disassembly and assembly are cumbersome, especially during construction, the installation and construction must be carried out in sequence, and the construction cannot be flexibly carried out, resulting in low overall construction efficiency. In addition, the subsequent maintenance is also relatively difficult. Second, although the use of compression fittings has the advantage of quick installation, it has higher requirements on sealing and connection structure for large-diameter pipeline connections, and may not be able to meet the requirements after long-term use. In addition, compression fittings cannot be recycled, and can only be destroyed and replaced during later maintenance, with high later maintenance costs, and cannot be adjusted during construction. In view of the pipeline connection problem, the existing technology has also made corresponding further improvements, such as the pipeline quick connection structure disclosed in the Chinese patent (authorization announcement number CN213776685U). In addition to the pipe fittings, this type of structure requires the use of special-shaped nuts. The pipe fittings and the special-shaped nuts are threadedly connected, and the special-shaped nuts and the pipelines are connected by a detachable clamping (i.e., a limiting structure). Overall, it has the advantages of being detachable and flexible to install. However, in specific analysis, the pipe fittings, pipelines, and special-shaped nuts need to be processed separately, which has many processes and high production costs, which is not conducive to promotion and application. Therefore, it is necessary to design a structure for large-diameter pipeline connections.

[0004] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility model content:

[0005] The purpose of the utility model is to solve the problems existing in the prior art and to provide a self-sealing structure and a connecting device for connecting large-diameter pipes. The sealing structure is simple and practical, the sealing effect is good, the connection structure is easy to disassemble and assemble, the connection is firm and reliable, and the construction is flexible and efficient.

[0006] The utility model achieves the above-mentioned purpose by adopting the following technical solutions:

[0007] A self-sealing structure for connecting large-diameter pipes comprises a pipe fitting, wherein the pipe fitting is provided with at least two mutually connected pipe interfaces, the pipe interfaces are connected to the pipe, an installation groove is provided on the inner wall of the pipe interface or on the outer wall of the pipe along the circumferential direction, a U-shaped sealing ring is provided on the installation groove, the U-shaped sealing ring is horizontally arranged with an opening facing inward, the U-shaped sealing ring is fixed in the installation groove by bonding glue, the inner diameter of the U-shaped sealing ring is smaller than the outer diameter of the pipe, the U-shaped sealing ring is located between the pipe fitting and the pipe for sealing, and after liquid is passed into the pipe, the U-shaped sealing ring radially extends under the action of the liquid and enhances the sealing under the action of the installation groove.

[0008] The pipe fitting is provided with two pipe interfaces, three pipe interfaces or four pipe interfaces.

[0009] The cross section of the mounting groove is rectangular.

[0010] The U-shaped sealing ring is internally provided with a U-shaped spring sheet.

[0011] A large-diameter pipe connection device includes the self-sealing structure as described above, a connection mechanism is provided between the pipe fitting and the pipe, the connection mechanism includes a groove A arranged on the inner wall of the pipe interface, a groove B is correspondingly provided on the outer wall of the pipe, a C-shaped retaining ring is provided in the groove A, a plurality of threaded holes are provided at intervals along the circumferential direction at positions corresponding to the groove A on the pipe interface, a screw is provided on the threaded hole, and the screw drives the C-shaped retaining ring part to enter the groove B to realize a locking connection between the pipe fitting and the pipe.

[0012] The utility model adopts the above structure, which can bring the following beneficial effects:

[0013] By designing pipe fittings, pipe interfaces, installation grooves and U-shaped sealing rings, the liquid pressure is fully utilized to act on the U-shaped sealing ring, thereby increasing the extrusion force of the U-shaped sealing ring, thereby significantly enhancing the sealing effect. The entire sealing structure is simple, practical and has a good sealing effect; the connection structure has the advantages of convenient disassembly and assembly, and a firm and reliable connection. Description of the drawings:

[0014] Figure 1 This is a structural schematic diagram of a self-sealing structure and a connecting device for connecting large-diameter pipes according to Embodiment 1 of the utility model;

[0015] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0016] Figure 3 This is a schematic diagram of the structure of a C-type retaining spring in Example 1 of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a U-shaped sealing ring in Example 1 of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the installation groove arranged on the pipeline in Embodiment 2 of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the pipeline in Example 2 of the utility model;

[0020] In the figure, 1. pipe fitting, 2. pipe interface, 3. pipe, 4. mounting groove, 5. U-shaped sealing ring, 6. opening, 7. adhesive glue, 8. U-shaped spring sheet, 9. connecting mechanism, 901. groove A, 902. groove B, 903. C-type retaining ring, 904. threaded hole, 905. screw. Specific implementation method:

[0021] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0022] 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.

[0023] 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.

[0024] Furthermore, the terms “horizontal”, “inner side”, “circumferential direction”, 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.

[0025] 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.

[0026] It should be noted that the self-sealing structure of the present application is mainly suitable for large-diameter pipe connections, and the effect is significant, but this does not mean that the self-sealing structure of the present application is limited to large-diameter pipe connections. It can also be applied to small-diameter pipe connections. The technical effect is not as significant as that applied to large-diameter pipe connections, but it can still be adopted.

[0027] Example 1

[0028] like Figure 1-4 As shown, a self-sealing structure for connecting large-diameter pipes comprises a pipe fitting 1, wherein the pipe fitting 1 is provided with at least two mutually connected pipe interfaces 2, wherein the pipe interface 2 is connected to a pipe 3, wherein a mounting groove 4 is provided on the inner wall of the pipe interface 2 along the circumferential direction, wherein a U-shaped sealing ring 5 is provided in the mounting groove 4, wherein the U-shaped sealing ring 5 is horizontally arranged with an opening 6 facing inward, wherein the U-shaped sealing ring 5 is fixed in the mounting groove 4 by means of adhesive glue 7, wherein the inner diameter of the U-shaped sealing ring 5 is smaller than the outer diameter of the pipe 3, wherein the pipe 3 is inserted into the pipe interface 2, wherein the U-shaped sealing ring 5 is located between the pipe fitting 1 and the pipe 3 for sealing, wherein after liquid (the liquid here is usually water and cannot be a corrosive liquid) is passed into the pipe 3, the U-shaped sealing ring 5 is squeezed and sealed under the action of the liquid. By designing the pipe fitting 1, the pipe interface 2, the installation groove 4 and the U-shaped sealing ring 5, the liquid pressure is fully utilized to act on the U-shaped sealing ring 5 (driving the U-shaped sealing ring 5 to stretch radially), thereby increasing the extrusion force of the U-shaped sealing ring 5, thereby significantly enhancing the sealing effect. The entire sealing structure is simple, practical and has a good sealing effect.

[0029] The pipe fitting 1 is provided with two pipe interfaces 2, three pipe interfaces 2, or four pipe interfaces 2. The corresponding selection is made according to the actual construction requirements. Two pipe interfaces 2 are commonly used, and the angle between the two pipe interfaces 2 can be adjusted according to the requirements. For example, the two pipe interfaces are in a straight line (i.e., the angle is 180°), and the two pipe interfaces can be set vertically (i.e., the angle is 90°).

[0030] The cross section of the mounting groove 4 is rectangular. The rectangular structure is not only easy to process, but also matches the structure of the horizontally arranged U-shaped sealing ring 5.

[0031] The U-shaped sealing ring 5 is internally provided with a U-shaped spring piece 8. The design of the U-shaped spring piece 8 can further improve the elasticity of the U-shaped sealing ring 5, ensuring that it can be normally opened to play a good sealing role.

[0032] A large-diameter pipe connection device includes the self-sealing structure as described above, a connection mechanism 9 is provided between the pipe fitting 1 and the pipe 3, the connection mechanism 9 includes a groove A901 provided on the inner wall of the pipe interface 2, a groove B902 is provided on the corresponding outer wall of the pipe 3, a C-shaped retaining ring 903 is provided in the groove A901, a plurality of threaded holes 904 are provided at intervals along the circumferential direction at the position corresponding to the groove A901 on the pipe interface 2, a screw 905 is provided on the threaded hole 904, and the screw 905 drives the C-shaped retaining ring 903 to partially enter the groove B902 to realize the locking connection between the pipe fitting 1 and the pipe 3. The connection structure not only realizes the rapid disassembly and assembly of the pipe 3 and the pipe fitting 1, but also can further reduce the distance between the pipe 3 and the pipe fitting 1, which is helpful to improve the construction quality. In practical applications, one of the screws 905 can be located at the opening of the C-shaped retaining ring 903, that is, the screw 905 does not act on the C-shaped retaining ring 903, but directly presses against the groove B902 of the pipe 3, thereby preventing the pipe 3 from rotating relative to the pipe fitting 1.

[0033] Example 2

[0034] The difference between this embodiment and embodiment 1 is that:

[0035] like Figure 5-6 As shown, a mounting groove 4 is provided on the outer wall of the pipe 3 along the circumferential direction. The mounting groove 4 can be provided on the outer wall of the pipe 3 according to actual needs.

[0036] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0037] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A self-sealing structure for connecting large diameter pipes, characterized in that: It comprises a pipe fitting, which is provided with at least two mutually connected pipe interfaces, the pipe interfaces are connected to the pipe, an installation groove is provided on the inner wall of the pipe interface or on the outer wall of the pipe along the circumferential direction, a U-shaped sealing ring is provided on the installation groove, the U-shaped sealing ring is horizontally arranged with an opening facing inward, the U-shaped sealing ring is fixed in the installation groove by bonding glue, the inner diameter of the U-shaped sealing ring is smaller than the outer diameter of the pipe, the U-shaped sealing ring is located between the pipe fitting and the pipe for sealing, and after liquid is introduced into the pipe, the U-shaped sealing ring radially extends under the action of the liquid and enhances the sealing under the action of the installation groove.

2. The self-sealing structure for connecting large-diameter pipes according to claim 1, characterized in that: The pipe fitting is provided with two pipe interfaces, three pipe interfaces or four pipe interfaces.

3. The self-sealing structure for connecting large-diameter pipes according to claim 1 or 2, characterized in that: The cross section of the mounting groove is rectangular.

4. The self-sealing structure for connecting large-diameter pipes according to claim 3, characterized in that: The U-shaped sealing ring is internally provided with a U-shaped spring sheet.

5. A large diameter pipe connection device, characterized in that: It includes a self-sealing structure for connecting large-diameter pipes as described in any one of claims 1 to 4 above, a connecting mechanism is provided between the pipe fitting and the pipe, the connecting mechanism includes a groove A arranged on the inner wall of the pipe interface, a groove B is correspondingly provided on the outer wall of the pipe, a C-shaped retaining ring is provided in the groove A, a plurality of threaded holes are provided at intervals along the circumferential direction at positions corresponding to the groove A on the pipe interface, a screw is provided on the threaded hole, and the screw drives the C-shaped retaining ring part to enter the groove B to realize a locking connection between the pipe fitting and the pipe.

Images