A variable-diameter self-sealing transition joint for gas pipelines

Abstract

The utility model relates to pipeline reducing transition joint technical field, especially disclose a kind of gas pipeline reducing self-sealing transition joint, including flange one and flange two, hold flange one and flange two make joint shorten, slide gauge is slid in the inside of adjusting frame, the position of slide gauge on adjusting frame is observed, the distance change condition between flange one and flange two is determined, then rotate screw until screw end portion is fixed the relative position between flange one and flange two outside slide gauge, the joint of fixed distance is moved to between two pipelines to be connected, the joint is moved to between the pipeline to be connected, after inserting one end, reversely rotate screw, the abutting force of screw slide gauge disappears at this time reversely rotating screw, the other end is inserted pipeline due to the elasticity of joint, thus do not need to continuously press joint, reduce operation difficulty and labour intensity, avoid rubber body partial uneven stress deformation, sealing layer breakage, guarantee sealing performance, further avoid burying gas leakage hidden danger.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe diameter change transition joints, and in particular to a self-sealing transition joint for gas pipeline diameter change. Background Technology

[0002] In gas transmission and distribution systems, reducing self-sealing transition joints are key components for connecting pipes of different diameters and ensuring stable gas transmission. Taking rubber reducing joints as an example, they are mainly composed of an elastic rubber body and two flanges of different specifications. By relying on the flexibility of the rubber material and the fastening effect of the flanges, a sealed connection between pipes is achieved.

[0003] In practical engineering applications, due to factors such as pipeline installation errors and spatial layout limitations, the length of the rubber reducer joint is often less than the distance between the pipes on both sides.

[0004] At this point, the construction workers need to continuously press the joint to deform it before it can be inserted into the gap between the two pipes. Then, the two ends of the joint are inserted into the pipe ports to complete the seal. On the one hand, the rubber reducer is made of soft material and has a large mass. Pressing it for a long time not only consumes physical strength but also increases the difficulty of operation. On the other hand, the rubber body is prone to local stress concentration under uneven external force, which can cause damage such as twisting and deformation of the rubber body and tearing of the sealing lip, thereby destroying the integrity of the sealing layer and creating a potential gas leak. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a self-sealing transition joint for gas pipeline diameter reduction. This solves the problem that when the length of the rubber reducing joint is less than the distance between the two pipelines, construction workers must continuously press the joint to deform it before it can be inserted into the gap between the two pipelines, and then insert both ends of the joint into the pipeline ports to complete the seal. On the one hand, the rubber reducing joint is made of a relatively soft material and is quite heavy; prolonged pressing not only consumes physical strength but also increases the difficulty of operation. On the other hand, the rubber body is prone to localized stress concentration under uneven external forces, leading to damage such as twisting and deformation of the rubber body and tearing of the sealing lip, thus compromising the integrity of the sealing layer and creating a potential gas leakage hazard.

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

[0007] A gas pipeline reducing self-sealing transition joint includes a flange one and a flange two. Two adjusting mechanisms for adjusting the distance between flange one and flange two are provided between flange one and flange two. Each adjusting mechanism includes a base block, a measuring plate, and an adjusting frame. The base block is located outside flange one, the end of the measuring plate is located outside the base block, and the adjusting frame is located outside flange two. The end of the measuring plate away from the base block is slidably connected to the inner side of the adjusting frame. Each adjusting frame is provided with a fixing mechanism for fixing the position of flange two. Each fixing mechanism includes a threaded hole and a screw. The threaded hole communicates with the inner side of the adjusting frame, and the screw is threadedly connected to the inside of the threaded hole.

[0008] Preferably, both ends of flange one are provided with slots, the end of the base block is engaged in the inside of the slots, both ends of each base block are provided with limit springs, both ends of each base block are provided with deformation grooves, one end of the limit spring is fixedly connected to the inside of the deformation groove, and the other end extends outward.

[0009] Preferably, both ends of flange one are provided with mounting grooves, the end of the adjusting bracket is snapped into the inside of the mounting groove, both ends of each adjusting bracket are provided with fixing springs, both ends of each adjusting bracket are provided with grooves, one end of the fixing spring is fixedly connected to the inside of the groove, and the other end extends outward.

[0010] Preferably, each base block has a screw hole on its exterior, and each screw hole has a threaded rod threadedly connected to its interior. The threaded rod is fixedly installed on the exterior of the measuring plate.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] Hold flange one and flange two to shorten the joint. The measuring plate slides smoothly along the preset sliding direction on the inside of the adjusting frame. By observing the position of the measuring plate on the adjusting frame, determine the change in distance between flange one and flange two. Then, rotate the screw until the end of the screw abuts against the outside of the measuring plate, fixing the relative position between flange one and flange two. Move the joint with the fixed distance between the two pipes to be connected. After inserting one end of the joint, rotate the screw in the opposite direction. At this time, rotating the screw in the opposite direction will make the clamping force of the screw and measuring plate disappear. Due to the elasticity of the joint, the other end will be inserted into the pipe. Therefore, there is no need to continuously press the joint, reducing the difficulty of operation and labor intensity, thereby shortening the diameter change construction time, avoiding uneven deformation of the rubber body and damage to the sealing layer, ensuring sealing performance, and thus avoiding the hidden danger of gas leakage. Attached Figure Description

[0013] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This utility model Figure 1 Structural diagram of flange 1;

[0016] Figure 3 This utility model Figure 2 Structural diagram of the central base block;

[0017] Figure 4 This utility model Figure 3 Exploded view of the middle block.

[0018] Legend: 1. Flange 1; 2. Flange 2; 3. Base block; 4. Measuring plate; 5. Adjusting bracket; 6. Threaded hole; 7. Screw; 8. Slot; 9. Limiting spring; 10. Deformation groove; 11. Mounting groove; 12. Fixing spring; 13. Groove; 14. Screw hole; 15. Threaded rod. Detailed Implementation

[0019] This application provides a gas pipeline reducing self-sealing transition joint, which effectively solves the problem that when the length of the rubber reducing joint is less than the distance between the two pipelines, construction personnel need to continuously press the joint to deform it before it can be inserted into the gap between the two pipelines, and then insert both ends of the joint into the pipeline ports to complete the seal. On the one hand, the rubber reducing joint is made of soft material and has a large mass. Long-term pressing operation not only consumes physical strength but also increases the difficulty of operation. On the other hand, the rubber body is prone to local stress concentration under uneven external force, which leads to damage such as twisting and deformation of the rubber body and tearing of the sealing lip, thereby destroying the integrity of the sealing layer and creating a potential gas leakage hazard.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in this application effectively solves the problem that when the length of the rubber reducing joint is less than the distance between the two pipes, construction workers need to continuously press the joint to deform it before it can be inserted into the gap between the two pipes, and then insert both ends of the joint into the pipe ports to complete the seal. On the one hand, the rubber reducing joint is made of a relatively soft material and has a large mass, and long-term pressing operation is not only physically demanding but also increases the difficulty of operation. On the other hand, the rubber body is prone to local stress concentration under uneven external force, which leads to damage such as twisting deformation of the rubber body and tearing of the sealing lip, thereby destroying the integrity of the sealing layer and creating a potential gas leakage hazard. The overall idea is as follows:

[0021] To address the problems existing in the prior art, this utility model provides a gas pipeline reducing self-sealing transition joint, including flange 1 and flange 2. Two adjusting mechanisms are provided between flange 1 and flange 2 for adjusting the distance between flange 1 and flange 2. Each adjusting mechanism includes a base block 3, a measuring plate 4, and an adjusting frame 5. The base block 3 is located outside flange 1, and the end of the measuring plate 4 is located outside the base block 3. The measuring plate 4 has scale lines on its outside, allowing workers to measure the distance between the two pipes and then ensure that the length of the joint is less than this distance. The adjusting frame 5 is located outside flange 2, and the end of the measuring plate 4 away from the base block 3 is slidably connected to the inside of the adjusting frame 5. Each adjusting frame 5 has a fixing mechanism on its outside for fixing the position of flange 2. Each fixing mechanism includes a threaded hole 6 and a screw 7. The threaded hole 6 is opened on the outside of the adjusting frame 5 and communicates with the inside of the adjusting frame 5. The screw 7 is threadedly connected to the inside of the threaded hole 6.

[0022] Both ends of flange 1 are provided with slots 8. The end of base block 3 is engaged inside the slot 8. Each end of base block 3 is provided with a limiting spring 9. Each end of base block 3 is provided with a deformation groove 10. One end of the limiting spring 9 is fixedly connected inside the deformation groove 10, and the other end extends outward. When base block 3 is inserted into the slot 8, the outward part of the limiting spring 9 undergoes elastic deformation under force. When the end of base block 3 is fully inserted into the slot 8, the limiting spring 9 adheres to the inner wall of the slot 8 under its own elastic action, thereby increasing the stability of the connection between base block 3 and slot 8.

[0023] Both ends of flange 1 are provided with mounting grooves 11. The end of the adjusting bracket 5 is snapped into the inside of the mounting groove 11. Each adjusting bracket 5 is provided with a fixing spring piece 12 at both ends. Each adjusting bracket 5 is provided with a groove 13 at both ends. One end of the fixing spring piece 12 is fixedly connected to the inside of the groove 13, and the other end extends outward. When the adjusting bracket 5 is inserted into the inside of the mounting groove 11, the outward part of the fixing spring piece 12 undergoes elastic deformation under force. When the end of the adjusting bracket 5 is fully inserted into the mounting groove 11, the fixing spring piece 12 adheres to the inner wall of the mounting groove 11 under its own elastic action, thereby increasing the stability of the connection between the adjusting bracket 5 and the mounting groove 11.

[0024] Each base block 3 has a screw hole 14 on its exterior, and a threaded rod 15 is threadedly connected inside each screw hole 14. The threaded rod 15 is fixedly installed on the exterior of the measuring plate 4, which facilitates the disconnection between the base block 3 and the measuring plate 4 and reduces the space occupied by the adjustment mechanism when it is stored.

[0025] Example 1

[0026] The operator holds flange 1 and flange 2 with both hands and applies pressure to gradually shorten the distance between them. As flange 1 and flange 2 approach each other, the measuring plate 4 slides smoothly along the preset sliding direction inside the adjusting frame 5. By observing the position of the measuring plate 4 on the adjusting frame 5, the change in distance between flange 1 and flange 2 can be visually determined. When flange 1 and flange 2 move to the appropriate position, i.e., the length of the joint is less than the length between the two different pipe diameters to be connected, the operator aligns the screw 7 with the threaded hole 6 and rotates the screw 7 to slowly screw it in along the internal thread of the threaded hole 6 until the end of the screw 7 abuts against the outside of the measuring plate 4. Because the end of the screw 7 is in close contact with the measuring plate 4, it prevents the measuring plate 4 from sliding further, thus fixing the relative position between flange 1 and flange 2. At this point, the distance between flange 1 and flange 2 is stabilized and fixed. Next, the joint and fuel... For the installation and connection of the gas pipeline, the joint with the fixed distance is moved to the space between the two pipelines to be connected. Then, one end of the joint with flange 1 is inserted into the interior of one of the pipelines. At this time, the screw 7 is rotated in the opposite direction to gradually unscrew along the threaded hole 6. As the screw 7 is unscrewed, the clamping force on the measuring plate 4 disappears, and the measuring plate 4 returns to a free sliding state. Then, due to the elasticity of the joint, the other end with flange 2 moves and is inserted into the interior of the other pipeline. Finally, flange 1 and flange 2 are connected to the corresponding pipelines using bolts and nuts, thereby ensuring the stable installation of the entire transition joint in the gas pipeline system. The joint is fixed by the adjustment mechanism and the fixing mechanism, which facilitates the quick connection between the joint and the pipeline without the need for continuous pressing of the joint, reducing the difficulty of operation and labor intensity, thereby shortening the construction time for diameter change, avoiding uneven deformation of the rubber body and damage to the sealing layer, ensuring sealing performance, and thus avoiding the hidden danger of gas leakage.

[0027] Example 2

[0028] After the joint is installed, pull the base block 3 and the adjusting bracket 5 to disconnect them from the slot 8 and the mounting slot 11. At this time, the adjusting mechanism is disassembled. The reducing transition joint retains only the necessary flange connection structure in the gas pipeline system, avoiding interference that the adjusting mechanism may cause. This ensures that the joint can freely expand and contract and move during pipeline operation, effectively adapting to the displacement of the gas pipeline caused by factors such as temperature changes and pressure fluctuations, and ensuring the safe and stable operation of the gas pipeline system.

[0029] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A gas pipeline reducing self-sealing transition joint, comprising flange one (1) and flange two (2), characterized in that, Two adjustment mechanisms are provided between flange one (1) and flange two (2) for adjusting the distance between flange one (1) and flange two (2). Each adjustment mechanism includes a base block (3), a measuring plate (4) and an adjustment frame (5). The base block (3) is located outside flange one (1), the end of the measuring plate (4) is located outside the base block (3), and the adjustment frame (5) is located outside flange two (2). The end of the measuring plate (4) away from the base block (3) is slidably connected to the inside of the adjustment frame (5). Each adjusting frame (5) is provided with a fixing mechanism for fixing the position of flange 2 (2) on the outside. Each fixing mechanism includes a threaded hole (6) and a screw (7). The threaded hole (6) is connected to the inside of the adjusting frame (5), and the screw (7) is threaded into the inside of the threaded hole (6).

2. The gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Both ends of flange 1 (1) are provided with slots (8); The base block (3) is engaged with the inside of the slot (8) at its end.

3. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Each of the base blocks (3) is provided with limit springs (9) at both ends.

4. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Each of the base blocks (3) has deformation grooves (10) at both ends; One end of the limiting spring (9) is fixedly connected to the inside of the deformation groove (10), and the other end extends outward.

5. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Both ends of the flange (1) are provided with mounting grooves (11); The end of the adjustment bracket (5) is engaged inside the mounting slot (11).

6. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Each of the adjustment frames (5) is provided with a fixing spring (12) at both ends.

7. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Each of the adjustment brackets (5) has a groove (13) at both ends; One end of the fixing spring (12) is fixedly connected to the inside of the groove (13), and the other end extends outward.

8. A gas pipeline reducing self-sealing transition joint as described in claim 1, characterized in that, Each of the base blocks (3) has a screw hole (14) on its exterior, and each screw hole (14) has a threaded rod (15) threaded inside, which is fixedly installed on the exterior of the measuring plate (4).

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