Insulation joint assembly for gas pipeline

Abstract

The utility model discloses an insulating joint assembly for a gas pipeline, which comprises a metal nut, an upper connecting sleeve body piece and a lower external thread sleeve body piece, the upper connecting sleeve body piece and the lower external thread sleeve body piece are made of metal, and the lower part of the upper connecting sleeve body piece and the upper part of the lower external thread sleeve body piece are fixed in an insulating sleeve body piece; an outer sleeve body part extending upwards is formed on the outer side wall of the upper part of the lower threaded sleeve body part, the outer side wall of the insulating sleeve body part is fixed on the inner side wall of the outer sleeve body part, and the outer sleeve body part covers the outer side wall of the insulating sleeve body part; the upper connecting sleeve body part and the lower external thread sleeve body part are separated through the insulating sleeve body part, insulation is kept, meanwhile, the outer side wall of the insulating sleeve body part is wrapped by the outer sleeve body part, so that the outer sleeve body part can be clamped by a wrench during assembly and disassembly, and due to the fact that the outer sleeve body part is a metal part, the outer sleeve body part is high in strength and good in corrosion-resistant and wear-resistant effect and clamping effect; and after being used for a long time, the tool is not prone to fracture, damage and deformation and can be normally clamped through a wrench, and later normal repair, maintenance and disassembly are facilitated.

Description

Technical field:

[0001] The utility model relates to the technical field of gas pipes, and more specifically to an insulating joint assembly for gas pipelines. Background technology:

[0002] The structure of the traditional pipe joint is metal contact sealing, one end is a movable nut with internal threads, and the other end is a pipe fitting with external threads, which is used for assembly connection between pipe fittings.

[0003] However, in some special applications, the pipes need to be connected to each other and insulated from each other. For example, stove pipes, water heater pipes, and wall-mounted boiler pipes are directly connected to metal bellows, or connected to metal pipes through traditional metal pipe joints. Metal joints and metal nuts are prone to static electricity during the connection process, which affects the safety of pipeline use.

[0004] Similarly, when the connected device is turned on, it will also generate electric current, etc., which poses certain safety issues.

[0005] Some of them directly use all-plastic pipe fittings. However, due to the elastic deformation of plastic materials, they are not strong enough and are prone to deformation or even leakage during connection. They are also poor in firmness and anti-collision effect.

[0006] Therefore, a joint assembly with an insulating function with Chinese patent application number 202220336733.2 is provided, which is used to assemble and connect the pipe fittings on both sides through the setting of an insulating connecting ring, while making the pipe fittings insulated from each other, has better safety and improves the service life of the connected pipe fittings. However, the middle part of the insulating material is on the outside and is formed into an outer wall surface with a regular hexagonal cross-section. It can be clamped at this part with a wrench during installation and rotated to drive the external threaded pipe to rotate. Since this clamping part is an insulating material, ABS plastic and other materials are generally used, and its hardness and strength are limited. After being clamped with a wrench for many times, its surface is easily deformed, affecting the clamping of the wrench. Moreover, its surface is prone to aging and cracking over time, so that during later repair, maintenance and disassembly, it cannot be firmly clamped with a wrench due to surface cracks, affecting subsequent repair, maintenance and disassembly. Utility model content:

[0007] The purpose of the utility model is to address the deficiencies of the prior art and to provide an insulating joint assembly for a gas pipeline. The utility model adopts an insulating sleeve member to separate the upper connecting sleeve member and the lower externally threaded sleeve member to maintain insulation. At the same time, the outer wall of the insulating sleeve member is covered by an outer sleeve body portion, so that when loading and unloading, a wrench can clamp the outer sleeve body portion. The utility model has high strength, good corrosion resistance and wear resistance, and good clamping effect.

[0008] The technical solutions of the utility model are as follows:

[0009] An insulating joint assembly for a gas pipeline comprises a metal nut, an upper connecting sleeve member and a lower externally threaded sleeve member made of metal, wherein the lower part of the upper connecting sleeve member and the upper part of the lower externally threaded sleeve member are fixed in the insulating sleeve member;

[0010] An outer sleeve portion extending upward is formed on the upper outer wall of the lower threaded sleeve member, and the outer wall of the insulating sleeve member is fixed on the inner wall of the outer sleeve portion, and the outer sleeve portion covers the outer wall of the insulating sleeve member; the outer sleeve portion can protect the outer wall of the insulating sleeve member, prevent it from contacting with the outside air and other positions to cause aging and other problems, thereby increasing its service life.

[0011] The upper part of the upper connecting sleeve body part extends out of the top surface of the insulating sleeve body part and is movably mounted with a metal nut.

[0012] A vertical stepped through hole with a large diameter hole section at the upper part and a small diameter hole section at the lower part is formed in the middle part of the insulating sleeve body, the top end of the vertical stepped through hole extends out of the top surface of the insulating sleeve body, and the bottom end of the vertical stepped through hole extends out of the bottom surface of the insulating sleeve body, the lower part of the upper connecting sleeve body is in the large diameter hole section, the lower outer side wall of the upper connecting sleeve body is fixed on the inner side wall of the large diameter hole section, and the bottom surface of the upper connecting sleeve body is pressed against the bottom end surface of the large diameter hole section;

[0013] An upwardly extending annular groove is formed in the middle of the bottom surface of the insulating sleeve body, the upper part of the lower externally threaded sleeve body is inserted into the annular groove, the outer side wall and the inner side wall of the upper part of the lower externally threaded sleeve body are fixed on the side walls at the inner and outer sides of the annular groove, and an external thread is formed on the lower outer side wall of the lower externally threaded sleeve body.

[0014] The middle outer wall of the lower external threaded sleeve is formed with a horizontal radial extension edge, the top surface of the outer wall edge of the horizontal radial extension edge is formed with an outer sleeve body portion extending upward, and the top surface of the horizontal radial extension edge is fixed on the bottom end surface of the insulating sleeve

[0015] A thickened portion is formed on the outer wall of the outer casing, and the cross section of the outer wall of the thickened portion is a regular hexagon, which can be conveniently clamped by a wrench, has high strength and strong anti-deformation ability.

[0016] The beneficial effects of the utility model are:

[0017] It uses an insulating sleeve part to separate the upper connecting sleeve part and the lower external threaded sleeve part to maintain insulation. At the same time, the outer wall of the insulating sleeve part is covered by the outer sleeve part. The outer wall of the insulating sleeve part is not easily contacted by foreign substances, so it is not easy to age. Moreover, when loading and unloading, a wrench can clamp the outer sleeve part. Since the outer sleeve part is a metal part, it has high strength, good corrosion resistance and wear resistance, good clamping effect, and is not easy to break, damage or deform after long-term use. It can be clamped normally with a wrench, which is convenient for normal repair, maintenance and disassembly in the later stage. Description of the drawings:

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a partial bottom view of the utility model;

[0020] Figure 3 yes Figure 1 A partial enlarged view of . Specific implementation method:

[0021] Example: See Figures 1 to 3 As shown, an insulating joint assembly for a gas pipeline includes a metal nut 10, an upper connecting sleeve body 20 and a lower externally threaded sleeve body 30 made of metal. The metal nut 10, the upper connecting sleeve body 20 and the lower externally threaded sleeve body 30 in this embodiment are all made of copper metal material or stainless steel metal material, which has good corrosion resistance and high strength.

[0022] The lower part of the upper connecting sleeve body part 20 and the upper part of the lower externally threaded sleeve body part 30 are fixed in the insulating sleeve body part 40;

[0023] An outer sleeve portion 31 extending upward is formed on the upper outer side wall of the lower threaded sleeve member 30, and the outer side wall of the insulating sleeve member 40 is fixed on the inner side wall of the outer sleeve portion 31, and the outer sleeve portion 31 covers the outer side wall of the insulating sleeve member 40;

[0024] The upper portion of the upper connecting sleeve member 20 extends out of the top surface of the insulating sleeve member 40 and is movably mounted with a metal nut 10 .

[0025] Furthermore, a vertical stepped through hole with a large diameter hole section at the upper part and a small diameter hole section at the lower part is formed in the middle part of the insulating sleeve body 40, the top end of the vertical stepped through hole extends out of the top surface of the insulating sleeve body 40, and the bottom end of the vertical stepped through hole extends out of the bottom surface of the insulating sleeve body 40, the lower part of the upper connecting sleeve body 20 is in the large diameter hole section, and a tooth-shaped portion is formed on the lower outer wall of the upper connecting sleeve body 20, so that when it is fixed to the inner side wall of the large diameter hole section of the insulating sleeve body 40, it is firmly fixed and not easy to be separated, the lower outer wall of the upper connecting sleeve body 20 is fixed on the inner side wall of the large diameter hole section, and the bottom surface of the upper connecting sleeve body 20 is pressed against the bottom end surface of the large diameter hole section;

[0026] An upwardly extending annular groove 41 is formed in the middle of the bottom surface of the insulating sleeve body 40, and the upper part of the lower externally threaded sleeve body 30 is inserted into the annular groove 41. The outer side wall and the inner side wall of the upper part of the lower externally threaded sleeve body 30 are fixed on the side walls at the inner and outer sides of the annular groove 41. The outer side wall of the upper part of the lower externally threaded sleeve body 30 is formed with a toothed portion, which can increase the connection area between the side wall at the outer side of the annular groove 41, so that it is firmly fixed and not easy to loosen or detach.

[0027] An external thread is formed on the lower outer side wall of the lower external thread sleeve body 30 .

[0028] An inner sleeve body portion 42 extending downward is formed in the middle of the bottom surface of the insulating sleeve body 40, and the outer side wall of the inner sleeve body portion 42 is fixed to the inner side wall of the lower externally threaded sleeve body 30. The bottom end surface of the inner sleeve body portion 42 is flush with the bottom end surface of the lower externally threaded sleeve body 30. The inner sleeve body portion 42 extends vertically downward from the lower end of the small diameter hole section of the insulating sleeve body 40, so that it can cover the inner side wall of the entire lower externally threaded sleeve body 30.

[0029] The lower external threaded sleeve body 30 has a horizontal radial extension edge 32 formed on the middle outer wall, and an outer sleeve body portion 31 extending upward is formed on the top surface of the outer wall edge of the horizontal radial extension edge 32. The top surface of the horizontal radial extension edge 32 is fixed on the bottom end surface of the insulating sleeve body 40.

[0030] The top surface of the insulating sleeve body 40 is flush with the top surface of the outer sleeve body 31. The insulating sleeve body 40 can be made of various corresponding corrosion-resistant plastic materials such as PP and ABS.

[0031] The insulating sleeve member 40 in this embodiment is manufactured by injection molding, and is fixed to the upper connecting sleeve member 20 and the lower externally threaded sleeve member 30 during the injection molding.

[0032] Furthermore, a thickened portion 311 is formed on the outer wall of the outer casing 31, and the cross section of the outer wall of the thickened portion 311 is a regular hexagon. The thickened portion 311 is used for wrench clamping, and because it is made of metal material, it has high strength, good corrosion resistance and wear resistance, good clamping effect, and is not easy to break, damage or deform after long-term use. It can be clamped normally with a wrench, which is convenient for normal repair, maintenance and disassembly in the later stage.

[0033] A radially extending edge portion 210 is formed on the inner side wall of the bottom end of the upper connecting sleeve body 20, and the bottom surface of the radially extending edge portion 210 is fixed to the bottom end surface of the large diameter hole section.

[0034] The upper part of the upper connecting sleeve member 20 extends out of the top surface of the insulating sleeve member 40, and an insulating rubber layer 1 is fixed on the outer side wall thereof (it can be fixed by wrapping the outer wall surface of the portion of the upper connecting sleeve member 20 extending out of the top surface of the insulating sleeve member 40 with a rubber belt), an upper radial extension edge 22 is formed on the top outer side wall of the upper connecting sleeve member 20, the top end of the upper connecting sleeve member 20 is inserted into the lower part of the middle through hole of the metal nut 10, an internal thread is formed on the inner side wall of the middle through hole of the metal nut 10, and a first radial extension edge 11 is formed on the inner side wall of the bottom end of the middle through hole of the metal nut 10. 1 is located below the upper radially extending edge 22, a lower insulating gasket 2 is inserted in the top end of the upper connecting sleeve body 20, the upper part of the insulating rubber layer 1 is inserted in the middle through hole of the lower insulating gasket 2, the bottom surface of the lower insulating gasket 2 is pressed against the top surface of the first radially extending edge 11, the top surface of the lower insulating gasket 2 is pressed against the bottom surface of the upper radially extending edge 22, the upper annular sealing gasket 3 is pressed against the top surface of the upper radially extending edge 22, the bottom surface of the edge of the upper annular sealing gasket 3 is formed with an annular sleeve portion 4 extending downward, the upper radially extending edge 22 is located in the annular sleeve portion 4, and the inner side wall of the annular sleeve portion 4 is pressed against the outer side wall of the upper radially extending edge 22.

[0035] The insulation between the upper connecting sleeve 20 and the metal nut 10 is achieved through the insulating rubber layer 1 , the lower insulating gasket 2 and the upper annular sealing gasket 3 . Multiple insulation is adopted to achieve better insulation effect between the lower external threaded sleeve 30 and the metal nut 10 .

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An insulating joint assembly for a gas pipeline, comprising a metal nut (10), an upper connecting sleeve member (20) made of metal and a lower externally threaded sleeve member (30), characterized in that: The lower part of the upper connecting sleeve member (20) and the upper part of the lower externally threaded sleeve member (30) are fixed in the insulating sleeve member (40); An outer sleeve portion (31) extending upward is formed on the upper outer side wall of the lower externally threaded sleeve member (30), the outer side wall of the insulating sleeve member (40) is fixed on the inner side wall of the outer sleeve portion (31), and the outer side wall of the outer sleeve portion (31) covers the outer side wall of the insulating sleeve member (40); The upper part of the upper connecting sleeve member (20) extends out of the top surface of the insulating sleeve member (40) and is movably mounted with a metal nut (10).

2. The insulating joint assembly for a gas pipeline according to claim 1, characterized in that: The middle part of the insulating sleeve (40) is formed with a vertical stepped through hole with a large diameter hole section at the top and a small diameter hole section at the bottom. The top end of the vertical stepped through hole extends out of the top surface of the insulating sleeve (40), and the bottom end of the vertical stepped through hole extends out of the bottom surface of the insulating sleeve (40). The lower part of the upper connecting sleeve (20) is located in the large diameter hole section. The lower outer side wall of the upper connecting sleeve (20) is fixed to the inner side wall of the large diameter hole section, and the bottom surface of the upper connecting sleeve (20) is pressed against the bottom end surface of the large diameter hole section. An annular groove (41) extending upward is formed in the middle of the bottom surface of the insulating sleeve (40), the upper part of the lower externally threaded sleeve (30) is inserted into the annular groove (41), the outer side wall and the inner side wall of the upper part of the lower externally threaded sleeve (30) are fixed to the side walls at the inner and outer sides of the annular groove (41), and an external thread is formed on the lower outer side wall of the lower externally threaded sleeve (30).

3. The insulating joint assembly for a gas pipeline according to claim 2, characterized in that: An inner sleeve portion (42) extending downward is formed in the middle of the bottom surface of the insulating sleeve member (40), and the outer side wall of the inner sleeve portion (42) is fixed to the inner side wall of the lower externally threaded sleeve member (30).

4. The insulating joint assembly for a gas pipeline according to claim 3, characterized in that: The bottom end surface of the inner sleeve body portion (42) is flush with the bottom end surface of the lower externally threaded sleeve body component (30).

5. The insulating joint assembly for a gas pipeline according to claim 2, characterized in that: A horizontal radial extension edge (32) is formed on the middle outer wall of the lower externally threaded sleeve member (30), an outer sleeve member (31) extending upward is formed on the top surface of the outer wall edge of the horizontal radial extension edge (32), and the top surface of the horizontal radial extension edge (32) is fixed to the bottom end surface of the insulating sleeve member (40).

6. The insulating joint assembly for a gas pipeline according to claim 5, characterized in that: The top surface of the insulating sleeve body (40) is flush with the top surface of the outer sleeve body portion (31).

7. The insulating joint assembly for a gas pipeline according to claim 1, characterized in that: A thickened portion (311) is formed on the outer side wall of the outer casing portion (31), and the cross section of the outer side wall of the thickened portion (311) is a regular hexagon.

8. The insulating joint assembly for a gas pipeline according to claim 1, characterized in that: A radially extending edge portion (210) is formed on the inner side wall of the bottom end of the upper connecting sleeve body (20), and the bottom surface of the radially extending edge portion (210) is fixed to the bottom end surface of the large-diameter hole section.

9. The insulating joint assembly for a gas pipeline according to claim 1, characterized in that: The upper part of the upper connecting sleeve member (20) extends out of the top surface of the insulating sleeve member (40), and an insulating rubber layer (1) is fixed on its outer wall. An upper radial extension edge (22) is formed on the outer wall of the top end of the upper connecting sleeve member (20). The top end of the upper connecting sleeve member (20) is inserted into the lower part of the middle through hole of the metal nut (10). An internal thread is formed on the inner wall of the middle through hole of the metal nut (10). A first radial extension edge (11) is formed on the inner wall of the bottom end of the middle through hole of the metal nut (10). The first radial extension edge (11) is located at the upper radial extension edge (22). At the bottom, a lower insulating gasket (2) is inserted into the top of the upper connecting sleeve body (20), the bottom surface of the lower insulating gasket (2) is pressed against the top surface of the first radially extending edge (11), the top surface of the lower insulating gasket (2) is pressed against the bottom surface of the upper radially extending edge (22), the upper annular sealing gasket (3) is pressed against the top surface of the upper radially extending edge (22), the bottom surface of the edge of the upper annular sealing gasket (3) is formed with an annular sleeve (4) extending downward, the upper radially extending edge (22) is in the annular sleeve (4), and the inner side wall of the annular sleeve (4) is pressed against the outer side wall of the upper radially extending edge (22).

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