Equal-diameter butt-joint socket and spigot press-fit pipe fitting
By designing the concave structure of the outer convex core sleeve layer in the insertion press-fitting fitting, the problems of poor compatibility and insufficient sealing in the prior art are solved, and higher sealing, tensile strength and stability are achieved, suitable for large-scale production and reduced costs.
Patent Information
- Application Number
- CN202420693492.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-07
AI Technical Summary
现有承插压合管件结构存在外壳层相对于芯套层外壁向外凸出,导致兼容性差,芯套层承插部端部容易塌陷,影响密封效果,并且密封性能、抗拉拔性能和抗震性能有限。
A equal diameter butt and plug-in press fitting is designed, with the outer shell layer convex and the core sleeve layer concave inward to form a double-layer structure socket. The end of the core sleeve layer is longer than the end of the outer shell layer, which enhances structural stability and adopts mechanical pressing during pressing, preferably annular pressure and clamping methods.
By setting the inner concave insertion of the outer convex support part of the outer shell layer, compatibility and sealing are improved, the problem of end collapse of the core sleeve layer is solved, tensile strength and stability are improved, and it is suitable for batch and large-scale production, reducing overall costs.
Smart Images
Figure CN222597078U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline connection devices, in particular to an equal-diameter butt-jointed socket-and-spigot press-fit pipe fitting. Background Art
[0002] Existing socket-and-spigot compression fitting connection structures are as follows: Figure 1 As shown, it includes a core sleeve layer and an outer shell layer 1, one end of the outer shell layer 1 is connected to the outer wall of the core sleeve layer, and the core sleeve layer includes a socket part 22 and a main body part 21 connected to the outer shell layer 1, wherein a double-layer structured socket 3 is formed between the outer shell layer 1 and the socket part 22 of the core sleeve layer. When in use, a pipe 4 is inserted into the socket 3, and then a crimping tool 5 is used to perform crimping to achieve the connection between the pipe fitting and the pipe.
[0003] The current socket-and-spigot compression fitting structure has at least the following defects: ① The outer shell layer 1 of this structure protrudes outward relative to the outer wall of the core sleeve layer. After being crimped with the pipe, it cannot meet the requirement that all components have the nominal outer diameter, and the compatibility is poor; ② One end of the socket part 22 of the core sleeve layer is flush with the end of the outer shell layer 1. After compression, the end of the socket part 22 of the core sleeve layer is prone to collapse, affecting the sealing effect; ③ The sealing performance, pull-out resistance and seismic resistance of this structure are limited and need to be further improved. Summary of the invention
[0004] The purpose of the utility model is to provide an equal-diameter butt-jointed socket-and-spigot press-fit pipe fitting to solve the above-mentioned problem.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: an equal-diameter butt-jointed socket-and-spigot compression fitting, comprising a core sleeve layer and an outer shell layer, one end of the outer shell layer being connected to the outer wall of the core sleeve layer, the core sleeve layer comprising a socket portion, a connecting portion connected to the outer shell layer, and a main body portion, after the outer shell layer is convex outward and the socket portion of the core sleeve layer is concave inward, a double-layer socket is formed between the outer shell layer and the socket portion, and the end of the socket portion of the core sleeve layer is longer than the end of the outer shell layer.
[0006] The socket part of the core sleeve layer extends outward by a certain distance relative to the outer shell layer, and the extending distance is optionally in the range of 2 to 50 mm, preferably 1 / 5 to 1 / 50 of the caliber, and more preferably 1 / 10 of the caliber. This enhances the strength and structural stability of the end of the core sleeve layer, improves the stress state of the end of the socket part of the core sleeve layer of the pipe fitting during pressing, and solves the problem of collapse of the end of the core sleeve layer after pressing. The pressing method adopts mechanical pressing, preferably ring pressing and clamping.
[0007] As a preferred technical solution, the outward convexity of the outer shell layer is similar to the inward concaveness of the socket portion of the core sleeve layer, and preferably the same, so that the structure is symmetrical and the force is better.
[0008] As a preferred technical solution, the main body is an elbow pipe, a straight pipe, a three-way pipe or a four-way pipe.
[0009] As a preferred technical solution, the main body, the connecting part and the socket part of the core sleeve layer are connected to form an integral body, or the main body, the connecting part and the socket part of the core sleeve layer are integrally formed. The core sleeve layer and the outer shell layer are preferably made of stainless steel.
[0010] As a preferred technical solution, a socket of the double-layer structure is respectively provided at both ends of the core sleeve layer, and the outer shell layers are two unconnected ones, and the two outer shell layers are respectively connected to the core sleeve layer.
[0011] As a preferred technical solution, a socket of the double-layer structure is respectively provided at both ends of the core sleeve layer, and the outer shell layer is two layers connected to each other as a whole.
[0012] As a preferred technical solution, a socket of the double-layer structure is respectively provided at both ends of the core sleeve layer, and the core sleeve layer is composed of two sections that are not connected to each other.
[0013] The core sleeve layer and the outer shell are preferably integrally formed, and of course, can also be connected by welding. In addition, the connecting portion and the socket portion of the core sleeve layer can also be integrally formed, and then assembled with the outer shell welding mode.
[0014] As a preferred technical solution, a strip-shaped sealing ring is provided between the socket portion of the core sleeve layer and the pipe.
[0015] As a preferred technical solution, a strip-shaped sealing ring is provided between the socket portion of the core sleeve layer and the pipe.
[0016] Compared with the prior art, the advantages of the utility model are: ① The end of the core sleeve layer of the utility model extends out of the outer shell layer by a certain distance, which solves the problem of collapse of the end of the core sleeve layer after pressing, and the sealing is improved by about 30%; ② By setting a convex outer and concave inner structure, the compatibility is improved, and it is compatible with all parts with nominal outer diameters on the market, suitable for batch and large-scale production, and saves more than 20% of the comprehensive cost; ③ It is compatible with all parts with nominal outer diameters on the market. After connection, the other parts of the pipe fitting except the socket part (i.e. the main part and the connecting part) and the center of the wall thickness of the pipe are in a straight line, the stability is improved by more than 20%, and the tensile strength is improved by more than 20%. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a pipe fitting structure diagram of the prior art of the utility model;
[0018] Figure 2 This is a structural diagram of Embodiment 1 of the present utility model;
[0019] Figure 3 This is a connection diagram of Embodiment 1 of the present utility model;
[0020] Figure 4 This is a structural diagram of Embodiment 2 of the present utility model;
[0021] Figure 5 This is a structural diagram of Embodiment 3 of the present utility model;
[0022] Figure 6 This is a structural diagram of Embodiment 4 of the present utility model;
[0023] Figure 7 This is a structural diagram of Embodiment 5 of the present utility model;
[0024] Figure 8 This is a structural diagram of Embodiment 6 of the present utility model;
[0025] Fig. 9 This is a structural diagram of Embodiment 7 of the present utility model;
[0026] Fig.10 This is a structural diagram of Embodiment 8 of the present utility model;
[0027] Fig.11 This is a structural diagram of Embodiment 9 of the present utility model;
[0028] Fig.12 This is a structural diagram of embodiment 10 of the utility model.
[0029] In the figure: 1, outer shell layer; 21, main body; 22, connecting part; 23, socket part; 3, socket; 4, pipe; 5, crimping tool. DETAILED DESCRIPTION
[0030] The utility model will be further described below in conjunction with the accompanying drawings. Example
[0031] See also Figure 2 , an equal-diameter butt-jointed socket-and-spigot compression fitting, comprising a core sleeve layer and an outer shell layer 1, one end of the outer shell layer 1 being connected to the outer wall of the core sleeve layer, the core sleeve layer comprising a socket portion 23, a connecting portion 22 connected to the outer shell layer 1, and a main body portion 21, after the outer shell layer 1 is convex outward and the socket portion 22 of the core sleeve layer is concave inward, a double-layer structured socket 3 is formed between the outer shell layer 1 and the socket portion 23, and the end of the socket portion 23 of the core sleeve layer is longer than the end of the outer shell layer 1;
[0032] In this embodiment, the outward convexity of the outer shell layer 1 is the same as the inward concaveness of the socket portion 22 of the core sleeve layer;
[0033] The utility model sets the outer shell layer 1 as convex and the socket part 23 as concave (referred to as "convex and concave") to meet the size of the socket 3 while making the outer diameter of the welding end of the final assembly stroke of the convex and concave be the same as the nominal outer diameter, that is, Figure 2 The outer diameters of the three parts are all nominal diameter D, thereby improving the compatibility of the welding end with the external connection; if the structure of "the outer wall of the outer shell 1 is protruding outward relative to the outer wall of the core sleeve layer" in the prior art is adopted, only the outer diameter size of other parts of the pipe fitting is the size of the core sleeve layer, which cannot simultaneously meet the requirements of Figure 2 All three parts of the D;
[0034] See also Figure 3 When connecting, before the pipe 4 is inserted, the sealant can be injected into the inner side of the socket 3, and then the connection is completed by pressing with the crimping tool 5. Alternatively, before the pipe 4 is inserted into the socket 3, the sealant can be applied to the inner and outer surfaces of the pipe 4, and then the pipe 4 with the sealant is inserted into the socket 3, and then the connection is completed by pressing. Example
[0035] See also Figure 4 Compared with Example 1, this embodiment has a socket 3 of the double-layer structure at both ends of the core sleeve layer, and the outer shell layers 1 are two unconnected ones, and the two outer shell layers 1 are respectively connected to the core sleeve layer, and the rest is the same as Example 1. Example
[0036] See also Figure 5 Compared with Example 2, the main body of the core sleeve layer in this embodiment is a curved tube, and the rest is the same as Example 2. Example
[0037] See also Figure 6 Compared with Example 3, the main body of the core sleeve layer in this embodiment is another form of curved pipe, and the rest is the same as Example 3. Example
[0038] See also Figure 7 Compared with Example 2, the two outer shell layers 1 of this embodiment are interconnected as a whole, and the rest is the same as Example 2. Example
[0039] See also Figure 8 Compared with Example 5, the two outer shell layers 1 of this embodiment are interconnected as a whole, and the rest is the same as Example 5. Example
[0040] See also Fig. 9 Compared with Example 6, the two outer shell layers 1 of this embodiment are interconnected as a whole, and the rest is the same as Example 6. Example
[0041] See also Fig.10 Compared with Example 5, the core sleeve layer of this embodiment is divided into two sections that are not connected to each other, and the rest is the same as Example 5. Example
[0042] See also Fig.11 Compared with Example 6, the core sleeve layer of this embodiment is divided into two sections that are not connected to each other, and the rest is the same as Example 6. Example
[0043] See also Fig.12 Compared with Example 7, the core sleeve layer of this embodiment is divided into two sections that are not connected to each other, and the rest is the same as Example 7. Example
[0044] Compared with Example 1, in this embodiment, a strip sealing ring is arranged between the socket part 23 of the core sleeve layer and the pipe 4, and the longitudinal section of the strip sealing ring is rectangular; when the equal-diameter butt fitting is crimped with the pipe 4, the width of the strip sealing ring is less than, greater than or equal to the effective total width of the crimping tool 5. When it is greater than the effective total width of the crimping tool 5, it has a positioning function, and the widest width of the transition piece 4 can reach the total length of the socket part 23.
[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. An equal diameter butt-jointed socket-and-spigot compression fitting, comprising a core sleeve layer and an outer shell layer, wherein one end of the outer shell layer is connected to the outer wall of the core sleeve layer, characterized in that: The core sleeve layer includes a socket part, a connecting part connected to the outer shell layer, and a main body part. When the outer shell layer is convex outward and the socket part of the core sleeve layer is concave inward, a double-layer socket is formed between the outer shell layer and the socket part, and the end of the socket part of the core sleeve layer is longer than the end of the outer shell layer.
2. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1, characterized in that: The outward convexity of the outer shell layer is similar to the inward concaveness of the socket portion of the core sleeve layer.
3. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: The main body is an elbow pipe, a straight pipe, a three-way pipe or a four-way pipe.
4. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: The main body, the connecting part and the socket part of the core sleeve layer are connected to form a whole, or the main body, the connecting part and the socket part of the core sleeve layer are integrally formed.
5. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: A socket of the double-layer structure is respectively arranged at both ends of the core sleeve layer, and the outer shell layers are two unconnected ones, and the two outer shell layers are respectively connected to the core sleeve layer.
6. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: A socket of the double-layer structure is respectively arranged at both ends of the core sleeve layer, and the outer shell layer is composed of two mutually connected as a whole.
7. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: A socket of the double-layer structure is respectively arranged at both ends of the core sleeve layer, and the core sleeve layer is composed of two sections which are not connected to each other.
8. The equal diameter butt-jointed socket-and-spigot compression fitting according to claim 1 or 2, characterized in that: A belt-shaped sealing ring is arranged between the socket part of the core sleeve layer and the pipe.