CN220354764U

CN220354764U - External sealing assembly for gas pipe fitting

Info

Publication number: CN220354764U
Application number: CN202322106307.7U
Authority: CN
Inventors: 黄双武; 孙佳奇; 江益峰
Original assignee: Ningbo Hongwu Pipe Industry Co ltd
Current assignee: Ningbo Hongwu Pipe Industry Co ltd
Priority date: 2023-08-07
Filing date: 2023-08-07
Publication date: 2024-01-16
Anticipated expiration: 2033-08-07

Abstract

The utility model relates to the technical field of gas pipe sealing, and discloses a gas pipe fitting external sealing assembly, which is characterized by comprising an external threaded joint, a corrugated pipe, a nut, a fixing part and a sealing part, wherein one end of the corrugated pipe is fixed between the nut and the external threaded joint through the fixing part, a first protective sleeve and a second protective sleeve are arranged, a gap between the nut and a PE coating layer is wrapped through the first protective sleeve, namely, the gap between the nut and the PE coating layer is sealed, the drying of the inside of the pipe fitting is ensured, the service life of the corrugated pipe is greatly prolonged, and the leakage risk is reduced; the second protective sleeve is used for wrapping the first protective sleeve and is used for clamping the first protective sleeve so as to realize fixation.

Description

External sealing assembly for gas pipe fitting

Technical Field

The utility model relates to the technical field of gas pipe sealing, in particular to an external sealing assembly of a gas pipe fitting.

Background

The gas pipe has the characteristics of convenient installation, reliable connection, corrosion resistance and the like, wherein the gas corrugated pipe is a common gas transmission pipeline and is used for connecting a gas cooker with the gas pipeline;

the existing gas pipe fitting comprises a nut, a gap exists between the tail of the nut and the outer surface of the gas pipe coating layer, and other liquids such as water vapor or condensed water can possibly enter from the tail of the nut, so that corrosion is formed on the corrugated pipe.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide an external sealing component of a gas pipe fitting, which is used for sealing the tail part of a nut.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a gas pipe fitting outside seal assembly, includes external screw thread joint, bellows, nut, fixed part and sealing part, the nut with pass through between the external screw thread joint the one end of bellows is fixed, the nut cover is located outside the bellows, and with external screw thread joint threaded connection, PE coating is located outside the bellows, PE coating extends into in the nut, sealing part includes first protective sheath and second protective sheath, first protective sheath cover is located the nut with outside the PE coating, the second protective sheath cover is located outside the first protective sheath.

As a further improvement of the utility model, the first protective sleeve comprises two semicircular sleeves, the second protective sleeve comprises two semicircular buckling sleeves, the two semicircular sleeves are propped against each other, and the two semicircular buckling sleeves are buckled with each other.

As a further improvement of the utility model, the semicircular sleeve is made of silica gel, and the semicircular buckle sleeve is made of nylon plastic.

As a further improvement of the utility model, the fixing part comprises a half-type snap ring, a groove is formed in one end of the external threaded joint, which is close to the corrugated pipe, one end of the corrugated pipe extends into the groove and abuts against the external threaded joint, the half-type snap ring is sleeved on the corrugated pipe, and the nut abuts against the half-type snap ring, so that the corrugated pipe is clamped between the external threaded joint and the half-type snap ring.

As a further improvement of the utility model, a sealing ring is embedded at the bottom of the groove.

As a further improvement of the utility model, the inner side surface of the half-type snap ring is in an uneven shape and is matched with the outer side surface of the corrugated pipe.

As a further improvement of the utility model, the bottom of the groove is provided with an arc-shaped bulge which is propped against the end part of the corrugated pipe.

As a further improvement of the utility model, the novel corrugated pipe comprises a U-shaped elbow, wherein both ends of the U-shaped elbow are connected with the corrugated pipe through the fixing parts, and the sealing parts are arranged on the two ends of the U-shaped elbow.

As a further improvement of the utility model, a connecting port is arranged on the U-shaped elbow.

The utility model has the beneficial effects that: according to the utility model, the first protective sleeve and the second protective sleeve are arranged, and the gap between the nut and the PE coating layer is wrapped through the first protective sleeve, namely, the gap between the nut and the PE coating layer is sealed, so that the drying of the inside of the pipe fitting is ensured, the service life of the corrugated pipe is greatly prolonged, and the leakage risk is also reduced; the second protective sleeve is used for wrapping the first protective sleeve and is used for clamping the first protective sleeve so as to realize fixation.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present utility model;

fig. 3 is an exploded view of the present utility model.

Reference numerals: 1. an external threaded joint; 11. a groove; 12. a seal ring; 13. arc-shaped bulges; 2. a bellows; 3. a sealing part; 31. a first protective sleeve; 32. a second protective sleeve; 4. a PE coating layer; 5. a half-type clasp; 6. u-shaped elbow; 61. a connection port; 7. and (3) a nut.

Detailed Description

The utility model will now be described in further detail with reference to the drawings and examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Referring to fig. 1, 2 and 3, the external seal assembly for a gas pipe fitting of the present embodiment includes an external threaded joint 1, a corrugated pipe 2, a nut 7, a fixing portion and a sealing portion 3, wherein the corrugated pipe 2 is made of metal, one end of the corrugated pipe 2 is fixed between the nut 7 and the external threaded joint 1 through the fixing portion, the nut 7 is sleeved outside the corrugated pipe 2 and is in threaded connection with the external threaded joint 1, and a PE coating layer 4 is arranged outside the corrugated pipe 2, wherein the PE coating layer 4 is used for protecting the corrugated pipe 2 from exposure of the corrugated pipe 2;

the PE coating layer extends into the nut 7, the sealing part 3 comprises a first protective sleeve 31 and a second protective sleeve 32, the first protective sleeve 31 is sleeved outside the nut 7 and the PE coating layer 4, the second protective sleeve 32 is sleeved outside the first protective sleeve 31, a first step is formed on the inner ring of the first protective sleeve 31 and is propped against one end of the nut 7, which is far away from the external threaded joint 1, the minimum diameter of the inner ring of the first protective sleeve 31 is attached to the PE coating layer 4, and under the action of the second protective sleeve 32, the first protective sleeve 31 and the PE coating layer 4 are in a clamping state, so that water vapor or condensed water and other liquid are prevented from entering from the tail part of the nut 7;

the gap between the nut 7 and the PE coating layer 4 is wrapped through the first protective sleeve 31, namely, the gap between the nut 7 and the PE coating layer 4 is sealed, so that the drying of the inside of the pipe fitting is ensured, the service life of the corrugated pipe 2 is greatly prolonged, and the leakage risk is also reduced;

the second protective sleeve 32 is used for wrapping the first protective sleeve 31, and is used for clamping the first protective sleeve 31 so as to realize fixation.

Referring to fig. 3, the first protective sleeve 31 includes two semicircular sleeves, the second protective sleeve 32 includes two semicircular snap sleeves, the two semicircular sleeves are abutted against each other, the two semicircular snap sleeves are buckled with each other, the first protective sleeve 31 and the second protective sleeve 32 can be more conveniently installed, after the corrugated pipe 2 and the fixing portion are installed, the first protective sleeve 31 and the second protective sleeve 32 can be installed, the two semicircular sleeves are abutted against each other, and the two semicircular snap sleeves are abutted against each other to buckle, so that the installation is completed, and the installation is convenient and fast.

The semicircular sleeve is made of silica gel, and the semicircular buckle sleeve is made of nylon plastic.

Referring to fig. 3, the fixing portion includes a half-type snap ring 5, a groove 11 is provided at one end of the external screw joint 1 near the corrugated pipe 2, one end of the corrugated pipe 2 extends into the groove 11 and abuts against the external screw joint 1, the half-type snap ring 5 is sleeved on the corrugated pipe 2, the nut 7 abuts against the half-type snap ring 5, so that the corrugated pipe 2 is clamped between the external screw joint 1 and the half-type snap ring 5, the half-type snap ring 5 is pushed towards the inner side of the groove 11 in a manner of screwing the nut 7 and the external screw joint 1, a function of clamping the end of the corrugated pipe 2 between the external screw joint 1 and the half-type snap ring 5 is achieved, the installation manner is simple, and the installation efficiency is improved.

Referring to fig. 1 and 2, a sealing ring 12 is embedded at the bottom of the groove 11, and the sealing ring 12 increases the tightness among the half-type clamping ring 5, the corrugated pipe 2 and the groove 11, so as to prevent the corrugated pipe 2 from leaking.

The inner side surface of the half type snap ring 5 is provided with a concave-convex shape which is matched with the outer side surface of the corrugated pipe 2, the corrugated pipe 2 is provided with a corrugated shape which is matched with the concave-convex shape, so that the degree of fit between the corrugated pipe 2 and the half type snap ring 5 is higher, and the corrugated pipe 2 can be stably driven to move in the moving process of the half type snap ring 5, and the half type snap ring 5 has a certain clamping force on the corrugated pipe 2.

The bottom of recess 11 is provided with arcuation arch 13, and arcuation arch 13 offsets with the tip of bellows 2, increases the laminating area between recess 11 department and the bellows 2, and arcuation arch 13 offsets with the concavity department of half snap ring 5, has increased the clamp range to bellows 2 to make the fixed of bellows 2 more stable.

Referring to fig. 1 and 3, the corrugated pipe is further provided with a U-shaped elbow 6, two ends of the U-shaped elbow 6 are connected with corrugated pipes 2 through fixing parts, sealing parts 3 are provided, two corrugated pipes 2 are arranged in the whole pipe fitting, external threaded connectors 1 can be respectively arranged at two ends of each corrugated pipe 2, then the corrugated pipes are connected with the U-shaped elbow 6 through the external threaded connectors 1, in the embodiment, one external threaded connector 1 on a single corrugated pipe 2 is omitted, and the corrugated pipes are directly connected with the U-shaped elbow 6, so that cost is saved.

The U-shaped elbow 6 is provided with a connecting port 61, wherein the connecting port 61 is arranged in the middle of the U-shaped elbow 6 to form a three-way shape.

The above is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. A gas pipe fitting external seal assembly, characterized in that: including external screw thread joint (1), bellows (2), nut (7), fixed part and sealing part (3), nut (7) with pass through between external screw thread joint (1) will the one end of bellows (2) is fixed, nut (7) cover is located outside bellows (2) and with external screw thread joint (1) threaded connection, bellows (2) are equipped with PE coating (4) outward, PE coating extends into in the nut, sealing part (3) include first protective sheath (31) and second protective sheath (32), first protective sheath (31) cover is located nut (7) and outside PE coating (4), second protective sheath (32) cover is located outside first protective sheath (31).

2. The gas tube external seal assembly of claim 1, wherein: the first protective sleeve (31) comprises two semicircular sleeves, the second protective sleeve (32) comprises two semicircular buckling sleeves, the two semicircular sleeves are propped against each other, and the two semicircular buckling sleeves are buckled with each other.

3. The gas tube external seal assembly of claim 2, wherein: the semicircular sleeve is made of silica gel, and the semicircular buckle sleeve is made of nylon plastic.

4. The gas tube external seal assembly of claim 1, wherein: the fixing part comprises a half-type clamping ring (5), a groove (11) is formed in one end, close to the corrugated pipe (2), of the external threaded connector (1), one end of the corrugated pipe (2) stretches into the groove (11) and abuts against the external threaded connector (1), the half-type clamping ring (5) is sleeved on the corrugated pipe (2), and the nut (7) abuts against the half-type clamping ring (5), so that the corrugated pipe (2) is clamped between the external threaded connector (1) and the half-type clamping ring (5).

5. The gas tube external seal assembly of claim 4, wherein: a sealing ring (12) is embedded at the bottom of the groove (11).

6. The gas tube external seal assembly of claim 4, wherein: the inner side surface of the half-type clamping ring (5) is provided with an uneven shape and is matched with the outer side surface of the corrugated pipe (2).

7. The gas tube external seal assembly of claim 4, wherein: the bottom of the groove (11) is provided with an arc-shaped bulge (13), and the arc-shaped bulge (13) is propped against the end part of the corrugated pipe (2).

8. A gas tube external seal assembly according to any one of claims 1 to 7, wherein: the corrugated pipe is characterized by further comprising a U-shaped elbow (6), wherein two ends of the U-shaped elbow (6) are connected with the corrugated pipe (2) through the fixing parts, and the sealing parts (3) are arranged.

9. The gas tube external seal assembly of claim 8, wherein: a connecting port (61) is formed in the U-shaped elbow (6).