Leakage-proof insulating joint

Abstract

The utility model relates to the technical field of gas joints, in particular to a leakage-proof insulating joint which comprises outer lining plastic, an outer wire is arranged at the upper end of the outer lining plastic, inner lining plastic is arranged at the position of an inner channel of an opening in the upper end of the outer wire and located on the inner side of the outer wire, and the inner lining plastic is a whole and penetrates to the bottom of an opening in the lower end of the outer lining plastic. An inner thread is arranged in an opening in the lower end of the outer lining plastic, a sealing gasket is arranged at the bottom of the opening in the lower end of the outer lining plastic, fuel gas is guided to directly pass through an inner channel of the outer thread by directly adding the integral neck bush in the outer thread, the risk of fuel gas leakage is directly and effectively avoided, the structure is simple, an existing connector structure does not need to be greatly changed, and the cost is reduced. The production and maintenance cost is reduced, and the installation is convenient without additional adjustment.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas joint technical field, concretely is a kind of leakproof insulation joint. BACKGROUND

[0002] Gas meter is widely used in civilian life, as the main control component in residential water supply, heating, gas supply pipeline system, gas meter joint is used to connect gas source pipeline and the gas meter between user, to use gas meter to measure and count the gas consumption of user, it is generally connected with gas source pipeline using thread.

[0003] Reference Fig. 1 In prior art, the outer thread is metal material, and the position of the combination surface of the outer thread and the outer lining plastic will leak gas due to slipping or aging during installation, resulting in serious safety problems such as gas leakage.

[0004] Based on the above reasons, the utility model discloses a kind of leakproof insulation joints, by increasing the inner lining plastic that is penetrated to the bottom of joint in the inside of outer thread, make gas pass through inner lining plastic, gas will not be leaked due to the crack that may appear in combination surface, damage, ensure the safety of gas use. SUMMARY

[0005] The utility model discloses a kind of leakproof insulation joints, which overcomes the shortcomings of the prior art, by increasing the inner lining plastic that is penetrated to the bottom of joint in the inside of outer thread, make gas pass through inner lining plastic, gas will not be leaked due to the crack that may appear in combination surface, damage, ensure the safety of gas use.

[0006] To achieve the above object, the utility model provides a kind of leakproof insulation joints, including outer lining plastic, the upper end of outer lining plastic is provided with outer thread, the inside passage of the upper end opening of outer thread and the inside of outer thread are provided with inner lining plastic, inner lining plastic is an entirety and is penetrated to the bottom of outer lining plastic lower end opening, inner lining plastic is provided with inner thread in outer lining plastic lower end opening, the bottom of outer lining plastic lower end opening is provided with sealing pad.

[0007] The upper end of outer lining plastic and the periphery of outer thread are provided with outer thread protection cover.

[0008] The bottom of outer thread protection cover is located at the position of the combination surface of outer thread bottom and outer lining plastic connection.

[0009] Inner lining plastic lower end opening is provided with inner thread protection cover for thread connection with inner thread.

[0010] Outer lining plastic is the structure of upper narrow and lower wide.

[0011] Outer thread is the outer thread of metal material.

[0012] The diameter of the channel inside the inner plastic lining is smaller than the diameter of the inner thread inside the lower end opening of the outer plastic lining.

[0013] The outer plastic lining is integrally designed with the inner plastic lining.

[0014] The inner side end of the sealing gasket is inwardly concave.

[0015] The inner concave angle of the sealing gasket is 145°.

[0016] Compared with the prior art, the utility model discloses a kind of gas joint based on prior art, from the problem encountered in reality itself, from the connection of outer thread and pipeline, inner plastic lining structure channel is set in outer thread inside to make gas pass smoothly, directly circumvents the problem that gas leaks from outside outer thread due to installation slip or aging in prior art.In addition, the sealing ring designed in the utility model is inwardly concave, which can effectively prevent the sealing ring from being extruded and moving during installation of the product and the installed product, thereby affecting the sealing property.

[0017] The utility model directly and effectively improves the problem point, and can achieve more stringent and stable gas leakage prevention effect without making big structural size changes to the joint, which also reduces the design pressure and production cost to some extent.In addition, since the inner plastic lining and the outer plastic lining are both plastic materials, they also have insulation effect, which avoids potential electrical safety risks. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a schematic view of the cross section of the joint structure in the prior art.

[0019] Fig. 2 It is a schematic view of the cross section of the joint structure of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1 outer plastic lining, 2 outer thread, 3 inner thread, 4 sealing gasket, 5 outer thread protection cover, 6 inner thread protection cover, 7 inner plastic lining, 8 joint surface. DETAILED DESCRIPTION

[0022] The utility model will be further described in combination with the drawings.

[0023] Referring to Figs. 1-2 , the utility model provides a kind of leak-proof insulation joint, including outer plastic lining 1, the upper end of outer plastic lining 1 is provided with outer thread 2, the upper end opening inside passage place and located the inner side of outer thread 2 is provided with inner plastic lining 7, inner plastic lining 7 is an entirety and penetrates to the bottom of outer plastic lining 1 lower end opening, and inner thread 3 is provided in the lower end opening of outer plastic lining 1, and the bottom of the lower end opening of outer plastic lining 1 is provided with sealing gasket 4.

[0024] The upper end of the outer plastic 1 and the outer periphery of the outer wire 2 are provided with an outer wire protection cover 5.

[0025] The bottom of the outer wire protection cover 5 is located at the position of the joint surface 8 connected with the outer plastic 1 at the bottom of the outer wire 2.

[0026] The lower end opening of the outer plastic 1 is provided with an inner wire protection cover 6 which is threadedly connected with the inner wire 3.

[0027] The outer plastic 1 has a structure of being narrow at the upper end and wide at the lower end.

[0028] The outer wire 2 is made of metal material.

[0029] The diameter of the channel in the inner plastic 7 is smaller than the diameter of the inner wire 3 in the lower end opening of the outer plastic 1.

[0030] The outer plastic 1 and the inner plastic 7 are designed as a whole.

[0031] The inner side end of the sealing gasket 4 is inwardly concave.

[0032] The inner concave angle of the sealing gasket 4 is 145°.

[0033] Working principle:

[0034] Referring to Figs. 1-2 The present application does not need excessive debugging, and the inner plastic 7 is arranged in the inner portion of the outer wire 2 without affecting the threaded connection of the outer wire 2 and the gas pipeline. After the installation is completed, the gas in the pipeline can directly flow through the overall channel formed by the inner plastic 7. Even if the outer wire 2 and the pipeline appear to be installed to slip, or the joint surface 8 appears to be cracked due to aging, since the outermost end of the inner plastic 7 is flush with the outer wire 2, at this time, the gas can flow through the inner plastic 7 from the outermost end of the outer wire 2, and will not pass through the slipping position or the aging position of the joint surface 8, thereby avoiding the risk of gas leakage.

[0035] The above is only the preferred embodiment of the present application, which is only used to help understand the method and the core idea of the present application. The protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution belonging to the idea of the present application shall be considered as the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principle of the present application shall be considered as the protection scope of the present application.

[0036] The utility model from overall solution existing technology in gas joint because metal outer silk is in the pipeline installation and leads to the skid installation not tight, and the metal outer silk and the outer lining plastic aging and appear the joint surface crack thereby make the leakproofness of joint appear the loophole lead to the gas leakage etc. safety problem, through directly in the outer silk inside increased the integral type lining sleeve's way, guide gas directly from the outer silk inside passage, directly effectively avoided the risk of gas leakage, and simple structure, need not make big change to the existing joint structure, reduced the production, maintenance cost, and the installation is convenient and need not do the additional adjustment.

Claims

1. A leak-proof insulating joint, comprising an outer plastic liner (1), characterized in that, The upper end of the outer plastic liner (1) is provided with an outer thread (2), and the inner plastic liner (7) is provided at the inner channel of the upper opening of the outer thread (2) and located inside the outer thread (2). The inner plastic liner (7) is a whole and extends to the bottom of the lower opening of the outer plastic liner (1). The lower opening of the outer plastic liner (1) is provided with an inner thread (3), and the bottom of the lower opening of the outer plastic liner (1) is provided with a sealing gasket (4).

2. The leak-proof insulating joint according to claim 1, characterized in that, An outer wire protective cover (5) is provided at the upper end of the outer plastic liner (1) and around the outer wire (2).

3. The leak-proof insulating joint according to claim 2, characterized in that, The bottom of the outer wire protective cover (5) is located at the joint surface (8) where the bottom of the outer wire (2) is connected to the outer lining plastic (1).

4. The leak-proof insulating joint according to claim 1, characterized in that, An inner thread protective cover (6) is provided in the lower opening of the outer plastic liner (1) and is threadedly connected to the inner thread (3).

5. The leak-proof insulating joint according to claim 1, characterized in that, The outer plastic lining (1) has a structure that is narrow at the top and wide at the bottom.

6. The leak-proof insulating joint according to claim 5, characterized in that, The outer wire (2) is made of metal.

7. The leak-proof insulating joint according to claim 1, characterized in that, The diameter of the channel inside the inner lining plastic (7) is smaller than the diameter of the inner filament (3) inside the lower opening of the outer lining plastic (1).

8. The leak-proof insulating joint according to claim 1, characterized in that, The outer plastic lining (1) and the inner plastic lining (7) are designed as a single unit.

9. The leak-proof insulating joint according to claim 1, characterized in that, The inner end of the sealing gasket (4) is concave towards the center.

10. The leak-proof insulating joint according to claim 9, characterized in that, The concave angle of the sealing gasket (4) is 145°.

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