Sealing device for butt joint of gas pipelines

Abstract

The utility model provides a sealing device for fuel gas pipeline butt joint, which belongs to the technical field of fuel gas pipeline sealing and comprises a first connecting shell, a first sealing ring is mounted in the first connecting shell, a plurality of buffer springs are fixedly connected to the surface of the first connecting shell, and second connecting shells are fixedly connected to two ends of each buffer spring. And third connecting shells are fixedly connected to one ends of the outer sides of the second connecting shells on the two sides, U-shaped shells are arranged on the outer sides of the third connecting shells, and two connecting blocks are installed on the surfaces of the U-shaped shells. According to the gas pipeline sealing device, the U-shaped shell is in butt joint with a gas pipeline, the gas pipeline is attached, then the fixing nut is rotated, at the moment, the two connecting blocks move towards the inner side under the action of the fixing screw, so that the U-shaped shell shrinks towards the inner side, and at the moment, the sealing rack is driven by the U-shaped shell to clamp and seal the gas pipeline; and meanwhile, the first sealing ring can improve the sealing effect of the sealing device.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pipeline sealing, and in particular relates to a sealing device for gas pipeline butt jointing. Background Art

[0002] A gas pipeline is a pipeline system used to transport natural gas, liquefied petroleum gas, and other flammable gases. Gas pipelines are typically constructed of steel, plastic, or other materials, and are used to transport gas from production sites, storage facilities, or gas supply stations to users' residences, factories, or other locations. The design, construction, and operation of gas pipelines must strictly adhere to relevant safety standards and regulations to ensure the safety and reliability of the pipeline system. Pipeline systems typically require regular inspection, maintenance, and monitoring to prevent leaks, accidents, and other safety issues. The sealing devices at the pipe connections are a crucial part of the pipeline system, ensuring that gas does not leak at the pipe joints.

[0003] A search revealed that the existing patent number CN207921435U discloses a sealing device for a gas pipeline valve, including a pipeline, a valve installed on the pipeline, and sliding sleeves fitted on both sides of the pipeline and the valve. A first protective sleeve and a second protective sleeve are respectively fitted on the two sliding sleeves. The first protective sleeve and the second protective sleeve overlap on opposite sides. The upper and lower ends of one side of the second protective sleeve are fixedly connected with locking blocks, and the two locking blocks are respectively fitted into the locking grooves opened at the upper and lower ends of one side of the first protective sleeve. A circular groove is opened on the inner wall of the locking groove on the side opposite to the pipeline.

[0004] Although the above technical solution can improve the first and second protective sleeves, pulling the pull plate upwards and pushing the first and second protective sleeves relative to each other allows the locking block to engage in the locking groove. Then, releasing the pull plate allows the locking rod to be inserted back into the locking plate under the action of the compression spring. At this time, the first and second protective sleeves can be stably connected, thereby sealing the valve and ensuring the safe and stable operation of the pipeline system. However, the sealing performance of the above technical solution is poor, that is, it only seals between two gas pipelines. This leads to problems with the sealing performance between the two gas pipelines after a long period of use, increasing the probability of gas leakage in the gas pipeline. Utility Model Content

[0005] The purpose of the present utility model is to provide a sealing device for gas pipeline butt jointing, aiming to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A sealing device for gas pipeline docking, comprising: a first connecting shell, a first sealing ring is installed inside the first connecting shell, a plurality of buffer springs are fixedly connected to the surface of the first connecting shell, both ends of the buffer springs are fixedly connected to the second connecting shell, one end of the outer side of the second connecting shell on both sides is fixedly connected to the third connecting shell, a U-shaped shell is provided on the outer side of the third connecting shell, two connecting blocks are installed on the surface of the U-shaped shell, a fixing screw is installed on the surface of the connecting block on one side, and a fixing nut is installed on the surface of the connecting block on the other side, and a sealing rack is installed on the inner wall of the U-shaped shell.

[0008] As a preferred solution of this embodiment, two protrusions are provided on the surface of the second connecting shell, and the protrusions of the two second connecting shells are staggered.

[0009] As a preferred embodiment, a second sealing ring is provided inside the second connecting shell, and a sealing ring is provided on one side of the second sealing ring.

[0010] As a preferred embodiment, the surface of the first connecting shell is equipped with a plurality of fixing bolts for fixing the first sealing ring, and the surfaces of the two second connecting shells are provided with sliding grooves adapted to the fixing bolts.

[0011] As a preferred solution of this embodiment, a sealing half ring is provided inside the U-shaped shell, and the sealing half ring is located outside the sealing rack.

[0012] As a preferred solution of this embodiment, the inner wall of the sealing half ring gradually becomes smaller from the outside to the inside, and the size of the inner wall inside the sealing half ring is the same as that of the third connecting shell and the first sealing ring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention connects the U-shaped shell to the gas pipeline and fits the gas pipeline. Then, by rotating the fixing nut, the two connecting blocks move inward under the action of the fixing screw, causing the U-shaped shell to contract inward. At this time, the U-shaped shell drives the sealing toothed rack to clamp and seal the gas pipeline. Meanwhile, the first sealing ring improves the sealing effect of the sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached figure:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is an exploded view of the overall structure of this utility model;

[0019] Figure 3 This is an exploded view of a portion of the structure of this utility model;

[0020] Figure 4 This is an exploded view of a portion of the structure of this utility model.

[0021] The figure shows: 1. First connecting shell; 2. First sealing ring; 3. Buffer spring; 4. Second connecting shell; 5. Second sealing ring; 6. Sealing ring; 7. Fixing bolt; 8. Sliding groove; 9. Third connecting shell; 10. U-shaped shell; 11. Fixing screw; 12. Fixing nut; 13. Sealing rack; 14. Sealing half ring; 15. Connecting block. Detailed Implementation

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Please see Figures 1 to 4 As shown, this embodiment of the utility model provides a sealing device for gas pipeline connection, specifically including a first connecting shell 1. A first sealing ring 2 is installed inside the first connecting shell 1. Multiple buffer springs 3 are fixedly connected to the surface of the first connecting shell 1. Second connecting shells 4 are fixedly connected to both ends of the buffer springs 3. Third connecting shells 9 are fixedly connected to one end of the outer side of each of the two second connecting shells 4. A U-shaped shell 10 is provided on the outer side of the third connecting shell 9. Two connecting blocks 15 are installed on the surface of the U-shaped shell 10. A fixing screw 11 is installed on the surface of one connecting block 15, and a fixing nut 12 is installed on the surface of the other connecting block 15. A sealing toothed rack 13 is installed on the inner wall of the U-shaped shell 10. In this specific embodiment, the U-shaped shell 10 is connected to the gas pipeline to make the gas pipeline fit together. Then, the fixing nut 12 is rotated. At this time, under the action of the fixing screw 11, the two connecting blocks 15 move inward, thereby causing the U-shaped shell 10 to contract inward. At this time, the U-shaped shell 10 drives the sealing toothed rack 13 to clamp and seal the gas pipeline. At the same time, the first sealing ring 2 will improve the sealing effect of the sealing device.

[0024] Please see Figures 1 to 4As shown, the surface of the second connecting shell 4 has two protrusions, which are staggered. The protrusions on the surface of the second connecting shell 4 increase the sealing effect of the second connecting shell 4 on the gas pipeline, and also enhance the protection effect of the buffer spring 3 when it contracts. A second sealing ring 5 is provided inside the second connecting shell 4, and a sealing ring 6 is provided on one side of the second sealing ring 5. The cooperation of the second sealing ring 5 and the sealing ring 6 reduces the gap between the second connecting shell 4 and the first sealing ring 2, thereby increasing the sealing effect of the sealing device.

[0025] Please see Figures 1 to 4 As shown, the surface of the first connecting shell 1 is equipped with multiple fixing bolts 7 for fixing the first sealing ring 2, and the surfaces of the two second connecting shells 4 are each provided with sliding grooves 8 that are adapted to the fixing bolts 7. In this specific embodiment, the fixing bolts 7 facilitate the fixing of the first connecting shell 1 and the first sealing ring 2, and also facilitate the disassembly and replacement of the first sealing ring 2. The sliding grooves 8 facilitate the movement of the second connecting shell 4 under the action of the buffer spring 3, and reduce the probability of the second connecting shell 4 deviating from its trajectory due to movement. The U-shaped shell 10 is provided with a sealing half-ring 14 inside, and the sealing half-ring 14 is located outside the sealing rack 13. The inner wall of the sealing half-ring 14 gradually decreases in size from the outside to the inside, and the size of the inner wall of the sealing half-ring 14 is the same as that of the third connecting shell 9 and the first sealing ring 2. The sealing half-ring 14 facilitates the clamping of the gas pipe onto the inner wall of the U-shaped shell 10, and increases the sealing between the U-shaped shell 10 and the gas pipe.

[0026] The specific working principle of this utility model is as follows: the U-shaped shell 10 is connected to the gas pipeline and the gas pipeline is fitted together. Then, the fixing nut 12 is rotated. At this time, under the action of the fixing screw 11, the two connecting blocks 15 move inward, thereby causing the U-shaped shell 10 to shrink inward. At this time, the U-shaped shell 10 drives the sealing rack 13 to clamp and seal the gas pipeline. At the same time, the first sealing ring 2 will improve the sealing effect of the sealing device. The sealing half ring 14 makes it easy to clamp the gas pipeline onto the inner wall of the U-shaped shell 10. The fixing bolt 7 fixes the first connecting shell 1 and the first sealing ring 2, and at the same time, it is easy to disassemble and replace the first sealing ring 2. The sliding groove 8 facilitates the movement of the second connecting shell 4 under the action of the buffer spring 3.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sealing device for gas pipeline butt joint, characterized in that: The invention comprises a first connecting shell (1), wherein a first sealing ring (2) is installed inside the first connecting shell (1), a plurality of buffer springs (3) are fixedly connected to the surface of the first connecting shell (1), both ends of the buffer springs (3) are fixedly connected to a second connecting shell (4), one end of the outer side of the second connecting shell (4) on both sides is fixedly connected to a third connecting shell (9), a U-shaped shell (10) is arranged on the outer side of the third connecting shell (9), two connecting blocks (15) are installed on the surface of the U-shaped shell (10), a fixing screw (11) is installed on the surface of the connecting block (15) on one side, and a fixing nut (12) is installed on the surface of the connecting block (15) on the other side, and a sealing rack (13) is installed on the inner wall of the U-shaped shell (10).

2. The sealing device for gas pipeline connection according to claim 1, characterized in that: The surface of the second connecting shell (4) is provided with two protrusions, and the protrusions of the two second connecting shells (4) are arranged in a staggered manner.

3. The sealing device for gas pipeline connection according to claim 1, characterized in that: A second sealing ring (5) is arranged inside the second connecting shell (4), and a sealing ring (6) is arranged on one side of the second sealing ring (5).

4. The sealing device for gas pipeline connection according to claim 1, characterized in that: A plurality of fixing bolts (7) for fixing the first sealing ring (2) are installed on the surface of the first connecting shell (1), and sliding grooves (8) adapted to the fixing bolts (7) are provided on the surfaces of the two second connecting shells (4).

5. The sealing device for gas pipeline connection according to claim 1, characterized in that: A sealing half ring (14) is arranged inside the U-shaped shell (10), and the sealing half ring (14) is located outside the sealing rack (13).

6. The sealing device for gas pipeline connection according to claim 5, characterized in that: The inner wall of the sealing half ring (14) gradually becomes smaller from the outside to the inside, and the size of the inner wall inside the sealing half ring (14) is the same as the size of the third connecting shell (9) and the first sealing ring (2).

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