Gas pipeline connection sealing structure

Abstract

The utility model relates to the technical field of gas pipeline connection, and discloses a gas pipeline connection sealing structure which comprises two gas pipes, a connecting assembly is arranged between the two gas pipes, the connecting assembly comprises a fixed conical cylinder fixed on the outer wall of the left gas pipe, a first sealing gasket is fixed on the inner wall of the fixed conical cylinder, and a second sealing gasket is fixed on the inner wall of the fixed conical cylinder. An abutting conical base is fixed to the outer wall of the right gas pipe, a second sealing gasket is fixed to the outer wall of the abutting conical base, and the outer wall of the right gas pipe is further movably sleeved with a movable conical cylinder. The outer wall of the movable conical cylinder abuts against the inner wall of the first sealing gasket to achieve sealing, the inner wall of the movable conical cylinder abuts against the outer wall of the second sealing gasket to achieve sealing, the sealing area is larger than that of a traditional sealing ring, the sealing effect is better, meanwhile, the movable conical cylinder is connected with the interior of the fixed conical cylinder in an inserted mode, and the sealing effect is better. The compressive strength of the connecting mechanism is improved, and the possibility of gas leakage caused by dislocation of the connecting position of the two gas pipes is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pipeline connection, in particular to a gas pipeline connection sealing structure. Background Art

[0002] A natural gas pipeline is a pipeline that transports natural gas from a mining site or processing plant to a city's gas distribution center or industrial enterprise user. It is also called a gas transmission pipeline. Modern gas gathering pipelines and gas transmission pipelines are made of steel pipes connected by electric welding. There are many types of steel pipes, such as seamless pipes, spiral seam pipes, and straight seam pipes. These solve the defects of rubber pipes that are easy to fall off, easy to age, easy to be bitten by insects, and have a short service life. Gas transmission pipelines are assembled by connecting single pipes one by one. Gas is easy to leak, and is flammable and explosive. Therefore, special connection structures need to be installed for the connection between pipelines.

[0003] An existing gas pipeline connection structure (Announcement No.: CN221323632U) has at least the following disadvantages: although the device increases the sealing of the gas pipe connection through a double sealing structure, the sealing ring of the device is only arranged at the end of the support sleeve, and the end of the support sleeve can be arranged with a small area, which makes the area of the sealing ring small, and thus the final sealing area is small. The sealing effect still has room for improvement. In addition, the gas pipe is buried underground. Under the action of soil settlement, vertical pressure is applied to the connection of the gas pipe. Relying solely on the connection of bolts and nuts may cause slight misalignment of the gas pipe connection due to insufficient strength, resulting in the possibility of gas leakage. For this reason, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a gas pipeline connection sealing structure.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A gas pipeline connection sealing structure comprises two gas pipes, which are spaced apart left and right, and a connecting assembly is provided between the two gas pipes. The connecting assembly comprises a fixed cone cylinder fixed to the outer wall of the left gas pipe, a first sealing gasket is fixed to the inner wall of the fixed cone cylinder, an abutting cone seat is fixed to the outer wall of the right gas pipe, a second sealing gasket is fixed to the outer wall of the abutting cone seat, a movable cone cylinder is also movably sleeved on the outer wall of the right gas pipe, the outer wall of the movable cone cylinder abuts the inner wall of the first sealing gasket, a buffer cylinder is fixed to the right side of the movable cone cylinder, a sealing cone cylinder is fixed to the right side of the buffer cylinder, and the inner wall of the sealing cone cylinder abuts the outer wall of the second sealing gasket.

[0007] As a further solution of the present invention, the taper of the movable cone is equal to that of the first sealing gasket, the taper of the sealing cone is equal to that of the second sealing gasket, and the minimum inner diameter of the movable cone is greater than the maximum outer diameter of the abutting cone seat.

[0008] As a further solution of the present invention, a first flange is fixed to the outer walls of the two gas pipes, a sealing ring is fixed to the right side of the corresponding first flange, the sealing ring abuts against the left side of the other first flange, and a second flange is fixed to the outer wall of the sealing cone and the outer wall of the fixed cone. The two first flanges and the two second flanges are detachably connected by bolts and nuts.

[0009] As a further solution of the present invention, the length of the movable cone is half of the length of the fixed cone, the length of the abutting cone seat is half of the length of the sealing cone, and the outer diameter of the buffer cylinder is equal to the maximum diameter of the movable cone.

[0010] As a further solution of the present invention, the two first flanges are both located inside the buffer cylinder.

[0011] As a further solution of the present invention, a positioning rod is fixed to the left side of the second flange, and a positioning hole is opened on the left side of the other second flange, and the positioning rod is slidably inserted into the interior of the positioning hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The sealing is achieved by abutting the outer wall of the movable cone against the inner wall of the first sealing gasket, and the sealing is achieved by abutting the inner wall of the movable cone against the outer wall of the second sealing gasket, thereby achieving sealing of the connection between the two gas pipes. The sealing area is larger than that of the traditional sealing ring, and the sealing effect is better. At the same time, the movable cone and the fixed cone are connected in an internal plug-in manner, so that when the connection between the two gas pipes is subjected to vertical pressure, the auxiliary bolts of the movable cone and the fixed cone bear the pressure, thereby increasing the compressive strength of the connection mechanism and effectively reducing the possibility of gas leakage caused by misalignment of the connection between the two gas pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a gas pipeline connection sealing structure proposed by the present invention;

[0015] Figure 2 This is a schematic diagram of a three-dimensional split structure of a gas pipeline connection sealing structure proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the abutting cone seat of a gas pipeline connection sealing structure proposed by the present invention;

[0017] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the movable cone, buffer cylinder and sealing cone of a gas pipeline connection sealing structure proposed by the utility model.

[0018] In the figure: 1. gas pipe; 2. fixed cone; 201. first sealing gasket; 202. abutting cone seat; 203. second sealing gasket; 204. movable cone; 205. buffer cylinder; 206. sealing cone; 3. first flange; 301. sealing ring; 302. second flange; 4. positioning rod; 401. positioning hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1-Figure 4As shown, a gas pipeline connection sealing structure includes two gas pipes 1, the two gas pipes 1 are arranged at intervals on the left and right, and a connecting component is provided between the two gas pipes 1. The connecting component includes a fixed cone 2 fixed to the outer wall of the left gas pipe 1, and a first sealing gasket 201 is fixed to the inner wall of the fixed cone 2. The outer wall of the right gas pipe 1 is fixed with an abutting cone seat 202, and the outer wall of the abutting cone seat 202 is fixed with a second sealing gasket 203. The outer wall of the right gas pipe 1 is also movably sleeved with a movable cone 204, and the outer wall of the movable cone 204 abuts against the inner wall of the first sealing gasket 201. A buffer cylinder 205 is fixed to the right side of the movable cone 204, and a sealing cone 206 is fixed to the right side of the buffer cylinder 205. The sealing cone The inner wall of 206 abuts against the outer wall of the second sealing gasket 203, and sealing is achieved by utilizing the outer wall of the movable cone 204 to abut against the inner wall of the first sealing gasket 201. The inner wall of the movable cone 204 abuts against the outer wall of the second sealing gasket 203 to achieve sealing, thereby achieving sealing treatment of the connection between the two gas pipes 1, and the sealing area is larger than that of the traditional sealing ring, and the sealing effect is better. At the same time, the movable cone 204 is connected to the fixed cone 2 by internal plugging, so that when the connection between the two gas pipes 1 is subjected to vertical pressure, the movable cone 204 and the fixed cone 2 auxiliary bolts bear the pressure, thereby increasing the compressive strength of the connection mechanism, and effectively reducing the possibility of gas leakage caused by misalignment of the connection between the two gas pipes 1.

[0023] like Figure 2-Figure 4 As shown, in this embodiment, the taper of the movable cone cylinder 204 is equal to the taper of the first sealing gasket 201, the taper of the sealing cone cylinder 206 is equal to the taper of the second sealing gasket 203, and the minimum inner diameter of the movable cone cylinder 204 is greater than the maximum outer diameter of the abutting cone seat 202. By setting the taper of the movable cone cylinder 204 to be equal to the taper of the first sealing gasket 201, and the taper of the sealing cone cylinder 206 to be equal to the taper of the second sealing gasket 203, the outer wall of the movable cone cylinder 204 and the inner wall of the first sealing gasket 201, and the inner wall of the sealing cone cylinder 206 and the outer wall of the second sealing gasket 203 can better fit and abut, ensuring that the contact area between the two is maximized and the sealing effect is guaranteed. By making the minimum inner diameter of the movable cone cylinder 204 greater than the maximum outer diameter of the abutting cone seat 202, it is convenient for the abutting cone seat 202 to not hinder the movement of the movable cone cylinder 204 when the gas pipe 1 is disassembled.

[0024] like Figure 2-Figure 4As shown, in this embodiment, a first flange 3 is fixed to the outer wall of the two gas pipes 1, and a sealing ring 301 is fixed to the right side of the corresponding first flange 3. The sealing ring 301 abuts against the left side of the other first flange 3. The outer wall of the sealing cone 206 and the outer wall of the fixed cone 2 are fixed with a second flange 302. The two first flanges 3 and the two second flanges 302 are detachably connected by bolts and nuts. The two gas pipes 1 are detachably connected by providing the two first flanges 3 and bolts, thereby ensuring perfect docking of the two gas pipes 1 and avoiding misalignment between the two gas pipes 1 due to process differences, thereby causing gas leakage. The sealing ring 301 can further seal the connection of the gas pipe 1. The detachable connection between the second flange 302 and the bolts between the sealing cone 206 and the fixed cone 2 is convenient for disassembly and maintenance by staff.

[0025] like Figure 2-Figure 4 As shown, in this embodiment, the length of the movable cone cylinder 204 is half the length of the fixed cone cylinder 2, the length of the abutting cone seat 202 is half the length of the sealing cone cylinder 206, and the outer diameter of the buffer cylinder 205 is equal to the maximum diameter of the movable cone cylinder 204. Through the above arrangement, it can be ensured that the movable cone cylinder 204 still has movable space inside the fixed cone cylinder 2 and the sealing cone cylinder 206 on the outer wall of the abutting cone seat 202. When the first sealing gasket 201 and the second sealing gasket 203 soften and the sealing effect deteriorates due to long-term use, the movable cone cylinder 204 and the sealing cone cylinder 206 can be further moved inside the fixed cone cylinder 2 and on the outer wall of the abutting cone seat 202, so that the movable cone cylinder 204 and the sealing cone cylinder 206 abut the first sealing gasket 201 and the second sealing gasket 203 more closely, thereby ensuring the sealing performance and increasing the service life of the device.

[0026] like Figure 2-Figure 4 As shown, in this embodiment, the two first flanges 3 are both located inside the buffer cylinder 205. Through the above arrangement, it can be ensured that when the staff installs the two first flanges 3, they will not be hindered by the fixed cone 2, resulting in the inability to install the bolts and nuts.

[0027] like Figure 2-Figure 4 As shown, in this embodiment, a positioning rod 4 is fixed to the left side of the second flange 302, and a positioning hole 401 is opened on the left side of the other second flange 302. The positioning rod 4 and the positioning hole 401 are slidably inserted inside. By setting the positioning rod 4 and the positioning hole 401, a positioning function can be played when installing the two second flanges 302.

[0028] From the above description, it can be seen that the above embodiment of the present invention achieves the following technical effects: in use, the two gas pipes 1 are butted, and then the two first flanges 3 are installed together with bolts and nuts. At this time, the movable cone 204 is slid, and the positioning rod 4 is inserted into the interior of the positioning hole 401. By inserting the movable cone 204 into the interior of the fixed cone 2, the outer wall of the movable cone 204 is abutted and sealed against the inner wall of the first sealing gasket 201, and the movable cone 204 synchronously drives the sealing cone 206 to be sleeved on the outer wall of the abutting cone seat 202, so that the movable cone 204 The inner wall of the second gasket 203 is abutted and sealed, and then the two second flanges 302 are installed together with bolts and nuts to connect and seal the two gas pipes 1. By setting the taper of the movable cone 204 to be equal to the taper of the first gasket 201, and the taper of the sealing cone 206 to be equal to the taper of the second gasket 203, the outer wall of the movable cone 204 and the inner wall of the first gasket 201, and the inner wall of the sealing cone 206 and the outer wall of the second gasket 203 are better abutted, ensuring that the contact area between the two is maximized and the sealing effect is guaranteed. The minimum inner diameter of the movable cone 204 is larger than the maximum outer diameter of the abutting cone seat 202, so that when the gas pipe 1 is disassembled, the abutting cone seat 202 will not hinder the movement of the movable cone 204. The length of the movable cone 204 is half of the length of the fixed cone 2, the length of the abutting cone seat 202 is half of the length of the sealing cone 206, and the outer diameter of the buffer cylinder 205 is equal to the maximum diameter of the movable cone 204. It can be ensured that the movable cone 204 still has movable space inside the fixed cone 2 and the sealing cone 206 still has movable space on the outer wall of the abutting cone seat 202, which can be used in the first sealing gasket 201. When the second sealing gasket 203 softens after long-term use, resulting in a deteriorated sealing effect, the movable cone 204 and the sealing cone 206 are further moved inside the fixed cone 2 and on the outer wall of the abutment cone seat 202, so that the movable cone 204 and the sealing cone 206 are more tightly abutted against the first sealing gasket 201 and the second sealing gasket 203, ensuring the sealing and increasing the service life of the device. Since the two first flanges 3 are both located inside the buffer cylinder 205, it can be ensured that when the staff installs the two first flanges 3, they will not be hindered by the fixed cone 2, resulting in the inability to install the bolts and nuts.

[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements shall fall within the scope of the present invention as claimed.

Claims

1. A gas pipeline connection sealing structure, comprising two gas pipes (1), characterized in that: The two gas pipes (1) are arranged at intervals on the left and right sides, and a connecting assembly is provided between the two gas pipes (1). The connecting assembly comprises a fixed cone (2) fixed to the outer wall of the left gas pipe (1), a first sealing gasket (201) is fixed to the inner wall of the fixed cone (2), an abutting cone seat (202) is fixed to the outer wall of the right gas pipe (1), a second sealing gasket (203) is fixed to the outer wall of the abutting cone seat (202), a movable cone (204) is movably sleeved on the outer wall of the right gas pipe (1), the outer wall of the movable cone (204) abuts against the inner wall of the first sealing gasket (201), a buffer cylinder (205) is fixed to the right side of the movable cone (204), a sealing cone (206) is fixed to the right side of the buffer cylinder (205), and the inner wall of the sealing cone (206) abuts against the outer wall of the second sealing gasket (203).

2. A gas pipeline connection sealing structure according to claim 1, characterized in that: The taper of the movable cone (204) is equal to that of the first sealing gasket (201), the taper of the sealing cone (206) is equal to that of the second sealing gasket (203), and the minimum inner diameter of the movable cone (204) is greater than the maximum outer diameter of the abutting cone seat (202).

3. A gas pipeline connection sealing structure according to claim 2, characterized in that: A first flange (3) is fixed to the outer wall of each of the two gas pipes (1), a sealing ring (301) is fixed to the right side of the corresponding first flange (3), the sealing ring (301) abuts against the left side of the other first flange (3), a second flange (302) is fixed to the outer wall of the sealing cone (206) and the outer wall of the fixed cone (2), and the two first flanges (3) and the two second flanges (302) are detachably connected by bolts and nuts.

4. A gas pipeline connection sealing structure according to claim 3, characterized in that: The length of the movable cone (204) is half the length of the fixed cone (2), the length of the abutting cone seat (202) is half the length of the sealing cone (206), and the outer diameter of the buffer cylinder (205) is equal to the maximum diameter of the movable cone (204).

5. A gas pipeline connection sealing structure according to claim 4, characterized in that: The two first flanges (3) are both located inside the buffer cylinder (205).

6. A gas pipeline connection sealing structure according to claim 5, characterized in that: A positioning rod (4) is fixed on the left side of the corresponding second flange (302), and a positioning hole (401) is opened on the left side of the other second flange (302). The positioning rod (4) is slidably inserted into the interior of the positioning hole (401).

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