Non-gas-stop valve replacing device for gas pipeline

Abstract

The utility model provides a non-gas-stop valve replacing device for a gas pipeline, and relates to the technical field of pipeline valves. Comprising a U-shaped pipe fixed to a gas pipeline through a bolt and a hollow column in threaded connection with the two ends of the U-shaped pipe, the hollow column comprises a column body and a first hexagon head fixedly connected to one end of the column body, an exhaust port is formed in one side of the column body, a first gas inlet and a second gas inlet are formed in the other side of the column body, and the first gas inlet and the exhaust port are coaxially arranged; the second air inlet is formed under the first air inlet and communicated with the horizontal section of the U-shaped pipe, a lead screw is rotationally arranged in the column body, the lead screw is sleeved with a sliding block, the lead screw and the sliding block form threaded transmission, the sliding block is fixedly connected with a sealing block through a supporting rod, and the sealing block is tightly attached to the inner wall of the column body. The U-shaped pipe solves the problem that the disconnection effect of the U-shaped pipe is not stable after the U-shaped pipe is used in the prior art.

Description

Technical Field

[0001] The utility model provides a device for replacing valves in a gas pipeline without stopping the gas flow, and relates to the technical field of pipeline valves. Background Art

[0002] Gas pipelines, also known as transmission pipelines, are the pipes that carry gas from extraction sites or processing plants to urban distribution centers or industrial users. During operation, valves control the flow of gas within these pipelines. For some large gas pipelines, shutting down for maintenance can result in significant economic losses. Therefore, valve or pipeline replacement is often performed under pressure tapping, which requires large equipment such as gate valves, tapping machines, and balloon blockers.

[0003] In the prior art, Chinese patent publication number CN210004023U discloses a device for changing valves under pressure in plastic pipes, such as Figure 1 As shown, when the hollow column 4 is threadedly connected to the inner side of the U-shaped tube 3, the circular blade 42 punctures the plastic water pipe 1, so that the water inlet 44 is connected to the inside of the plastic water pipe 1, and the water outlet 45 is connected to the middle part of the U-shaped tube cavity 34, forming a new diversion channel. When the pipeline valve 4 is replaced and installed, the hollow column 4 can be rotated downward so that the circular blade 42 is on the same horizontal line as the lower side of the plastic water pipe 1, so that the plastic water pipe 1 is connected to the pipeline valve 2, and the U-shaped tube 3 is disconnected from the plastic water pipe 1.

[0004] The above device is also applicable to the situation where gas is transported by plastic pipes. However, after the hollow column is unscrewed a certain distance to allow the plastic pipe to pass through, the hollow column cannot be disassembled from the U-shaped pipe. The two ends of the U-shaped pipe must be sealed by the hollow column. At this time, the hollow column and the U-shaped pipe are not in a tightened state, resulting in an unstable structure of the hollow column and a risk of axial movement, thereby making it impossible to ensure that the U-shaped pipe and the plastic pipe are always disconnected. For this reason, we propose a gas pipeline non-stop valve replacement device. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the U-shaped tube in the prior art has an unstable disconnection effect after use.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model is: a gas pipeline non-stop valve replacement device, comprising a U-shaped tube fixed to the gas pipeline with bolts and a hollow column threadedly connected to both ends of the U-shaped tube, the hollow column comprising a column body and a hexagonal head 1 fixed to one end of the column body, an exhaust port is provided on one side of the column body, and air inlet 1 and air inlet 2 are provided on the other side, the air inlet 1 is coaxially arranged with the exhaust port, the air inlet 2 is arranged directly below the air inlet 1, the air inlet 2 is connected to the horizontal section of the U-shaped tube, a screw is rotatably arranged in the column, the screw outer sleeve is provided with a slider and forms a threaded transmission with the slider, the slider is fixed with a sealing block through a support rod, and the sealing block is tightly attached to the inner wall of the column.

[0007] Preferably, the bottom end of the screw is coaxially fixed with a rotating shaft, the bottom end of the rotating shaft passes through the column and the hexagonal head 1 and is fixed with the hexagonal head 2, the bottom surface of the hexagonal head 1 is provided with a groove, and the hexagonal head 2 is arranged in the groove.

[0008] Preferably, limiting edges are provided on both sides of the sealing block, and limiting sliding grooves cooperating with the limiting edges are provided on the inner wall of the column.

[0009] Preferably, the rotating shaft is also coaxially fixed with a rotating block, the outer wall of the rotating block is fixed with a rubber layer, the hexagonal head is provided with a rotating cavity that cooperates with the rotating block, and a side wall of the hexagonal head is provided with a hidden groove, and a locking bolt is threadedly connected to the hidden groove, and the end of the locking bolt is tightened against the side wall of the rotating block.

[0010] Preferably, a circular knife groove is provided on the top of the column.

[0011] Beneficial effects of the utility model:

[0012] After the valve is replaced, the hollow column does not need to be unscrewed and always remains tightened with the U-tube. The connection or disconnection between the U-tube and the gas pipeline can be adjusted by moving the sealing block up and down. The position of the sealing block can be locked by the locking bolt, which greatly improves the overall stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the prior art structure.

[0014] Figure 2 This is a schematic diagram of the overall structure of a gas pipeline non-stop valve replacement device of the utility model.

[0015] Figure 3 This is a schematic diagram of the hollow column structure of a gas pipeline non-stop valve replacement device of the utility model.

[0016] Figure 4 This is a bottom view of a hollow column of a device for replacing valves in gas pipelines without gas shut-off according to the utility model.

[0017] Figure 5 This is a cross-sectional view of a hollow column of a device for replacing valves in a gas pipeline without stopping the gas supply according to the utility model.

[0018] Figure 6 This is a schematic diagram of the sealing block structure of a device for replacing valves in gas pipelines without gas shut-off according to the utility model.

[0019] (1. Column; 2. Circular Slot; 3. Exhaust Port; 4. Hexagon Head 1; 5. Hidden Slot; 6. Locking Bolt; 7. Air Inlet 1; 8. Air Inlet 2; 9. Groove; 10. Hexagon Head 2; 11. Lead Screw; 12. Slider; 13. Sealing Block; 14. Support Rod; 15. Rotating Shaft; 16. Rotating Block; 17. Limiting Edge; 18. U-Shaped Tube; 19. Hollow Column) DETAILED DESCRIPTION

[0020] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 2 to 6 The present invention provides a device for replacing a valve in a gas pipeline without stopping gas, comprising a U-shaped tube 18 fixed to the gas pipeline by bolts and a hollow column 19 threadedly connected to both ends of the U-shaped tube 18. The hollow column 19 comprises a column body 1 and a hexagonal head 4 fixed to one end of the column body 1. The U-shaped tube 18 adopts the same structure as the prior art, so it will not be described in detail. The column body 1 and the hexagonal head 4 adopt an integrated molding technology. A circular knife groove 2 is provided on the top of the column 1. The circular knife groove 2 is used to make a hole in the gas pipeline. The pipeline fragments generated by the hole making can be directly left on the inner side of the circular knife groove 2. After the hollow column 19 is tightened, the circular knife groove 2 is pressed tightly against the top of the U-shaped tube 18.

[0022] Furthermore, if Figure 4 、 Figure 5 As shown, an exhaust port 3 is provided on one side of the column 1, and an air inlet 1 7 and an air inlet 2 8 are provided on the other side. The air inlet 1 7 is coaxially arranged with the exhaust port 3, and the air inlet 2 8 is arranged directly below the air inlet 1 7. The air inlet 2 8 is connected to the horizontal section of the U-shaped tube 18. Specifically, after the hollow column 19 is screwed into the U-shaped tube 18, the air inlet 1 7 and the exhaust port 3 are connected to the gas pipeline, and the air inlet 2 8 is connected to the horizontal section of the U-shaped tube 18. When the air inlet 1 7 is blocked, natural gas can only be transmitted through the U-shaped tube 18. At this time, the valve can be replaced without stopping the gas; when the air inlet 2 8 is blocked, the U-shaped tube 18 and the gas pipeline are cut off. At this time, the gas pipeline is unblocked again and the valve is used normally.

[0023] Furthermore, if Figure 5 、 Figure 6As shown, a screw 11 is provided for rotation in the cylinder 1, and a slider 12 is provided on the outer sleeve of the screw 11 to form a threaded transmission with the slider 12. The slider 12 is fixedly connected to a sealing block 13 through a support rod 14. The sealing block 13 is in close contact with the inner wall of the cylinder 1. Limiting ribs 17 are provided on both sides of the sealing block 13, and a limiting groove cooperating with the limiting rib 17 is opened on the inner wall of the cylinder 1. Specifically, the cross-section of the limiting rib 17 is I-shaped. The sealing block 13 is limited by the cooperation between the limiting rib 17 and the limiting groove so that it can only move up and down. The sealing block 13 limits the slider 12 through the support rod 14, so that the slider 12 can only move up and down, thereby forming a threaded transmission between the slider 12 and the screw 11. The rotation of the screw 11 drives the slider 12 to move up and down, thereby driving the sealing block 13 to move up and down, respectively blocking the air inlet 7 and the air inlet 2 8.

[0024] Furthermore, if Figure 5 As shown, the bottom end of the lead screw 11 is coaxially fixed with a rotating shaft 15. The bottom end of the rotating shaft 15 passes through the column 1 and the hexagonal head 1 4 and is fixed to the hexagonal head 2 10. The bottom surface of the hexagonal head 1 4 has a groove 9, and the hexagonal head 2 10 is disposed in the groove 9. Specifically, the rotating shaft 15 is connected to the column 1 and the hexagonal head 1 4 through sealed bearings, and the rotating shaft 15 can be rotated by the hexagonal head 2 10.

[0025] Furthermore, if Figure 3 、 Figure 5 As shown, the rotating shaft 15 is coaxially fixed to a rotating block 16. A rubber layer is fixed to the outer wall of the rotating block 16. A rotating cavity is defined within the hexagonal head 4, which mates with the rotating block 16. A hidden groove 5 is defined in the side wall of the hexagonal head 4. A locking bolt 6 is threadedly connected to the hidden groove 5. The end of the locking bolt 6 is pressed against the side wall of the rotating block 16. Specifically, by tightening the locking bolt 6, the end of the locking bolt 6 presses against the side wall of the rotating block 16, preventing the rotating block 16 from rotating. This restricts the rotating shaft 15 from rotating, preventing the screw 11 from rotating, and locking the sealing block 13.

[0026] Working Principle: Hexagonal head 1 (4) is used to screw column 1 into U-shaped tube 18. Circular groove 2 creates a hole in the gas pipeline, allowing column 1 to penetrate the pipeline. Initially, sealing block 13 blocks inlet 1 (7), restricting gas transmission to U-shaped tube 18. Valve replacement can now be performed without interrupting the flow of gas. After valve replacement, hexagonal head 2 (10) is rotated, driving screw 11 via shaft 15. This drives sealing block 13 downward, sealing inlet 2 (8). This disconnects U-shaped tube 18 from the gas pipeline, allowing the pipeline to flow freely again and the valve to function normally. Furthermore, screw 11 and sealing block 13 can be locked in place by tightening locking bolt 6, maintaining stability.

[0027] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. A device for replacing a valve in a gas pipeline without shutting down the gas pipeline, comprising a U-shaped tube bolted to the gas pipeline and a hollow column threadedly connected to both ends of the U-shaped tube, the hollow column comprising a column body and a hexagonal head fixed to one end of the column body, characterized in that: An exhaust port is provided on one side of the column, and an air inlet 1 and an air inlet 2 are provided on the other side. The air inlet 1 is coaxially arranged with the exhaust port, and the air inlet 2 is arranged directly below the air inlet 1. The air inlet 2 is connected to the horizontal section of the U-shaped tube. A screw is rotatably provided in the column, and a slider is provided on the outer sleeve of the screw to form a threaded transmission with the slider. The slider is fixed with a sealing block through a support rod, and the sealing block is tightly attached to the inner wall of the column.

2. The device for replacing a valve in a gas pipeline without shutting down the gas supply according to claim 1, characterized in that: The bottom end of the lead screw is coaxially fixed with a rotating shaft, the bottom end of the rotating shaft passes through the column and the hexagonal head and is fixed with the second hexagonal head, the bottom surface of the first hexagonal head is provided with a groove, and the second hexagonal head is arranged in the groove.

3. The device for replacing a valve in a gas pipeline without shutting down the gas supply according to claim 1, characterized in that: Limiting edges are arranged on both sides of the sealing block, and limiting sliding grooves matching with the limiting edges are opened on the inner wall of the column.

4. The device for replacing a valve in a gas pipeline without shutting down the gas supply according to claim 2, characterized in that: The rotating shaft is also coaxially fixed with a rotating block, the outer wall of the rotating block is fixed with a rubber layer, a rotating cavity is opened in the hexagonal head to match the rotating block, a hidden groove is opened on one side wall of the hexagonal head, a locking bolt is threadedly connected in the hidden groove, and the end of the locking bolt is tightened against the side wall of the rotating block.

5. The device for replacing a valve in a gas pipeline without shutting down the gas supply according to claim 1, characterized in that: A circular knife groove is provided on the top of the column.

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