Leaking stoppage structure for pipeline under pressure in chemical plant

Abstract

The invention belongs to the technical field of pipeline leaking stoppage, and discloses a chemical plant under-pressure pipeline leaking stoppage structure which comprises a first clamping ring and a second clamping ring, two threaded rods are connected between the first clamping ring and the second clamping ring in a penetrating mode, and nuts are connected to the positions, corresponding to the top end of the first clamping ring and the bottom end of the second clamping ring, of the outer sides of the two threaded rods through threads. Sealing gaskets are adhered to the opposite surfaces of the clamping ring I and the clamping ring II; an air pressure type detection mechanism is fixedly installed in the sealing gasket and comprises an air bag fixedly installed between the sealing gasket and the first clamping ring, and a connecting pipe penetrating through the first clamping ring is installed at the top end of the air bag in an embedded mode, so that the pressure intensity of the air bag on the damaged position of the pipeline can be conveniently monitored, and the unpredictable leakage problem is avoided; therefore, the requirement for emergency maintenance is reduced, the maintenance cost is reduced, the downtime is shortened, high reliability and stability of a pipeline system can be guaranteed, and the working efficiency of the whole system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipeline plugging, and in particular relates to a plugging structure for pressurized pipelines in chemical plants. Background Art

[0002] Pipeline transportation is widely used in people's lives and production. During use, pipelines often crack and break due to material corrosion, external force impact and other reasons, resulting in pipeline leakage. If not repaired in time, it will cause waste of resources, environmental pollution, and even life-threatening.

[0003] The pressurized piping systems of existing chemical plants usually use traditional plugging methods, such as:

[0004] Welding repair: Suitable for when the pipeline is broken or damaged, but the welding process requires production suspension, the operation is complicated and the safety risk is high.

[0005] Use mastic or epoxy resin: suitable for small holes or cracks in pipes, but the bonding strength is limited and it is difficult to withstand high-pressure environments.

[0006] Pipeline insertion repair: suitable for pipelines with severe internal corrosion or wear, but requires the replacement of longer pipeline sections, which is more expensive;

[0007] For this purpose, a pipeline leak-proof structure is required. The pipeline leak-proof structure uses two clamping rings to drive an object to block the leak point. However, the internal pressure is not easy to detect after blocking, which causes the pressure to be too high or too low during extrusion sealing, further affecting its sealing effect. Summary of the invention

[0008] The present invention aims at the problem that the internal pressure of the plug is difficult to detect after being blocked in the prior art, which causes the pressure to be too high or too low during the extrusion seal, further affecting the seal, and proposes the following technical solution:

[0009] A leak plugging structure for a pressurized pipeline in a chemical plant, comprising a first clamp ring and a second clamp ring: two threaded rods are connected through the first clamp ring and the second clamp ring, nuts are connected through threads at the outer sides of the two threaded rods corresponding to the top end of the first clamp ring and the bottom end of the second clamp ring, and sealing gaskets are bonded to the opposite surfaces of the first clamp ring and the second clamp ring;

[0010] A pneumatic detection mechanism is fixedly installed inside the sealing gasket, and the pneumatic detection mechanism includes an airbag fixedly installed between the sealing gasket and the clamp ring, a connecting tube that passes through the clamp ring is embedded in the top of the airbag, a one-way valve is fixedly installed at one end of the connecting tube, an air pressure gauge is fixedly installed on the outside of the connecting tube, a connecting cover is fixedly installed at one end of the one-way valve, guide tubes are symmetrically embedded on both sides of the connecting cover, an arc strip is fixedly installed at one end of the guide tube, and an extrusion strip is movably connected inside the arc strip.

[0011] As a preferred embodiment of the above technical solution, the arc strip is fixedly installed inside a retaining ring, the shape of the extruded strip is an I-shaped strip, a slide groove is provided inside the arc strip, and the length and width of one end face of the extruded strip are equal to the length and width of the slide groove.

[0012] As a preferred embodiment of the above technical solution, a guide ring is fixedly installed at one end of the extrusion strip at equal distances, a cylinder is slidably connected inside the guide ring, a disk is clamped and installed at one end of the cylinder, columns are clamped and installed at equal distances at the position of the disk corresponding to one end of the guide ring, and an abutment disk is clamped and installed at the other end of the cylinder.

[0013] As a preferred embodiment of the above technical solution, the abutment disk and the circular disk have the same shape, and arc grooves are provided on the back surfaces of the abutment disk and the circular disk.

[0014] As a preferred embodiment of the above technical solution, circular holes are equidistantly formed at one end of the guide ring, and the center lines of the circular holes and the center lines of the columns are interlaced.

[0015] As a preferred embodiment of the above technical solution, spring rods are symmetrically mounted on both sides of an inner wall of the clamping ring, a clamping block is fixedly mounted on the outer side of the spring rod, and a second magnet is fixedly mounted on the bottom end of the clamping block.

[0016] As a preferred embodiment of the above technical solution, limiting grooves are symmetrically provided on both sides of the top end of the second snap ring, and a first magnet is fixedly installed inside the limiting groove at the top end of the second snap ring.

[0017] As a preferred embodiment of the above technical solution, a positioning groove is provided inside the clamping ring at a position corresponding to the outer side of the clamping block, and the inner wall of the positioning groove and the outer side of the clamping block are in contact with each other.

[0018] As a preferred embodiment of the above technical solution, the shape of the limiting groove and the shape of the bottom end of the clamping block are both isosceles trapezoids, the top size of the limiting groove is larger than the bottom size, and the bottom size of the clamping block is smaller than the middle size.

[0019] The beneficial effects of the present invention are:

[0020] (1) It is easy to monitor the pressure of the airbag on the damaged part of the pipeline to avoid unforeseen leakage problems, thereby reducing the need for emergency repairs, reducing maintenance costs and downtime, ensuring the high reliability and stability of the pipeline system, and improving the working efficiency of the entire system;

[0021] (2) It can replenish the inside of the airbag, ensuring the continuous sealing effect of the airbag, avoiding the risk of leakage again due to pressure drop, and ensuring the stability of the pipeline during operation, while preventing the problem of insufficient gas inside the airbag resulting in unsatisfactory sealing effect;

[0022] (3) It can facilitate the positioning between the snap ring 1 and the snap ring 2, and then facilitate the installation between the snap ring 1 and the snap ring 2 and the threaded rod, thereby changing the installation difficulty between the snap ring 1 and the snap ring 2 and the threaded rod, thereby improving the installation efficiency between the snap ring 1 and the snap ring 2, and effectively preventing the problem of misalignment between the snap ring 1 and the snap ring 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The structure diagram of a leak plugging structure for a pressurized pipeline in a chemical plant in Example 1 is shown;

[0024] Figure 2 The rear view of a leak plugging structure for a pressurized pipeline in a chemical plant in Example 1 is shown;

[0025] Figure 3 The cross-sectional view of a leak plugging structure for a pressurized pipeline in a chemical plant in Example 1 is shown;

[0026] Figure 4 What is shown is a schematic diagram of the structure of the pneumatic detection mechanism in Example 1;

[0027] Figure 5 The example 1 is shown Figure 4 Schematic diagram of the structure of the middle A area;

[0028] Figure 6 The figure shows a schematic diagram of the installation structure of the extrusion strip in Example 1;

[0029] Figure 7 The example 1 is shown Figure 6 Schematic diagram of the structure of area B.

[0030] In the figure: 1. Snap ring 1; 2. Snap ring 2; 3. Threaded rod; 4. Nut; 5. Sealing gasket; 6. Pneumatic detection mechanism; 61. Air bag; 62. Connecting pipe; 63. Pressure gauge; 64. One-way valve; 65. Connecting cover; 66. Guide pipe; 67. Arc strip; 68. Extrusion strip; 69. Guide ring; 610. Cylinder; 611. Disc; 612. Column; 613. Abutment disc; 7. Spring rod; 8. Connecting block; 9. First magnet; 10. Second magnet; 11. Positioning groove; 12. Limiting groove. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0032] Example 1

[0033] The present invention provides a leak-proof structure for pressurized pipelines in chemical plants, such as Figures 1 to 7 As shown, it includes a snap ring 1 and a snap ring 2: two threaded rods 3 are connected between the snap ring 1 and the snap ring 2, nuts 4 are connected by threads at the outer sides of the two threaded rods 3 corresponding to the top end of the snap ring 1 and the bottom end of the snap ring 2, and sealing gaskets 5 are bonded to the opposite surfaces of the snap ring 1 and the snap ring 2;

[0034] A pneumatic detection mechanism 6 is fixedly installed inside the sealing gasket 5, and the pneumatic detection mechanism 6 includes an air bag 61 fixedly installed between the sealing gasket 5 and the retaining ring 1, a connecting tube 62 penetrating the retaining ring 1 is embedded in the top of the air bag 61, a one-way valve 64 is fixedly installed at one end of the connecting tube 62, an air pressure gauge 63 is fixedly installed on the outside of the connecting tube 62, a connecting cover 65 is fixedly installed at one end of the one-way valve 64, guide tubes 66 are symmetrically embedded on both sides of the connecting cover 65, an arc strip 67 is fixedly installed at one end of the guide tube 66, and an extrusion strip 68 is movably connected inside the arc strip 67.

[0035] like Figure 3 and Figure 4 As shown, the arc strip 67 is fixedly installed inside the clamping ring 1, the shape of the extrusion strip 68 is an I-type, a slide groove is opened inside the arc strip 67, and the length and width of one end face of the extrusion strip 68 are equal to the length and width of the slide groove, which can facilitate the movement of the extrusion strip 68 and limit the extrusion strip 68 to prevent the extrusion strip 68 from being offset.

[0036] like Figure 6 and Figure 7As shown, a guide ring 69 is fixedly installed at one end of the extrusion strip 68 at equal distances, a cylinder 610 is slidably connected inside the guide ring 69, a disc 611 is clamped and installed at one end of the cylinder 610, and a column 612 is clamped and installed at equal distances at the position of the disc 611 corresponding to one end of the guide ring 69, and an abutment plate 613 is clamped and installed at the other end of the cylinder 610, so that the guide ring 69 is blocked when the extrusion strip 68 moves, and when the extrusion strip 68 moves in the opposite direction, the disc 611 cannot block the guide ring 69, so that the gas cannot enter the extrusion strip 68.

[0037] like Figure 6 and Figure 7 As shown, the abutment plate 613 and the disc 611 have the same shape, and arc grooves are provided on the back sides of the abutment plate 613 and the disc 611 to facilitate blocking, thereby facilitating the movement of the abutment plate 613 and the disc 611 and changing the difficulty of moving the abutment plate 613 and the disc 611, thereby achieving a sealing state when one end of the extrusion strip 68 moves, and allowing the gas to enter the interior of the arc strip 67 when the other end moves.

[0038] like Figure 6 and Figure 7 As shown, circular holes are equidistantly provided at one end of the guide ring 69, and the center lines of the circular holes and the center lines of the columns 612 are staggered to prevent the columns 612 from entering the circular holes and causing blockage inside the circular holes, thereby facilitating the flow of gas.

[0039] like Figure 2 and Figure 3 As shown, spring rods 7 are symmetrically installed on both sides of the inner wall of the clamping ring 1, and a clamping block 8 is fixedly installed on the outside of the spring rod 7. A second magnet 10 is fixedly installed on the bottom end of the clamping block 8, which can facilitate the clamping block 8 to be fixed in mid-air, thereby changing the difficulty of fixing the clamping block 8 in mid-air. Limiting grooves 12 are symmetrically arranged on both sides of the top of the clamping ring 2, and a first magnet 9 is fixedly installed inside the limiting groove 12 at the top of the clamping ring 2. The first magnet 9 and the second magnet 10 have the same magnetic poles. Through the principle that two magnetic poles attract each other and opposite magnetic poles repel each other, the clamping block 8 enters the inside of the clamping ring 2, thereby limiting the position between the clamping ring 2 and the clamping ring 1, and a positioning groove 11 is arranged inside the clamping ring 1 at the position corresponding to the outside of the clamping block 8. The inner wall of the positioning groove 11 and the outside of the clamping block 8 fit together, which is convenient for guiding the clamping block 8, thereby changing the difficulty of guiding the clamping block 8.

[0040] like Figure 2 and Figure 3As shown, the shape of the limit groove 12 and the shape of the bottom end of the clamping block 8 are both isosceles trapezoids, the top size of the limit groove 12 is larger than the bottom size, and the bottom size of the clamping block 8 is smaller than the middle size, which facilitates the connection between the clamping ring 1 and the clamping ring 2, changes the connection difficulty between the clamping ring 1 and the clamping ring 2, and indirectly facilitates the fixation between the clamping ring 1 and the clamping ring 2.

[0041] Working principle: During the actual use of the device, the user assembles the clamping ring 1 and the clamping ring 2. At this time, the suction force between the first magnet 9 and the second magnet 10 causes the clamping block 8 to move, thereby driving the spring rod 7 to stretch. Since the clamping block 8 enters the limiting groove 12 when moving, the clamping ring 1 and the clamping ring 2 are limited, and then the clamping ring 1 and the clamping ring 2 are limited. Then the threaded rod 3 is installed, and then the nut 4 is installed between the threaded rod 3, which can facilitate the positioning between the clamping ring 1 and the clamping ring 2, and then facilitate the installation between the clamping ring 1 and the clamping ring 2 and the threaded rod 3, changing the installation difficulty between the clamping ring 1 and the clamping ring 2 and the threaded rod 3, thereby improving the installation efficiency between the clamping ring 1 and the clamping ring 2, and effectively preventing the problem of misalignment between the clamping ring 1 and the clamping ring 2.

[0042] Then the personnel rotate the nut 4, and the nut 4 moves along the outer side of the threaded rod 3 when rotating. At this time, the clamp ring 1 and the clamp ring 2 are in contact with the outer side of the pipe, and the sealing gasket 5 is driven to seal the damaged part of the pipe. At the same time, the sealing gasket 5 is subjected to the compression force of the pipe, which causes the airbag 61 to deform. After the airbag 61 is deformed, the internal pressure changes. When the pressure changes, it enters the inside of the pressure gauge 63 along the connecting pipe 62, so that it is easy to monitor the pressure of the airbag 61 on the damaged part of the pipe, avoiding unforeseen leakage problems, thereby reducing the need for emergency repairs, reducing maintenance costs and downtime, ensuring the high reliability and stability of the pipeline system, and improving the working efficiency of the entire system;

[0043] Then, when the barometer 63 shows that the pressure is insufficient, the personnel pulls the extrusion strip 68, and the extrusion strip 68 moves along the inside of the arc strip 67, and simultaneously drives the abutment disk 613 and one end of the extrusion strip 68 to fit together under the action of the gas, so that a seal is formed between the extrusion strip 68 and the inside of the arc strip 67. At this time, the gas inside the arc strip 67 enters the inside of the connecting cover 65 along the guide tube 66, and enters the inside of the one-way valve 64 through the connecting cover 65, and finally enters the inside of the airbag 61 along the one-way valve 64, so that the inside of the airbag 61 is pressurized, and when pulling in the opposite direction, the disc 611 drives the column 612 to fit on the surface of the extrusion strip 68, and the circular hole of the guide ring 69 cannot be blocked, so that the outside gas enters the inside of the arc strip 67, so that the outside gas can always replenish the inside of the airbag 61, ensuring the continuous sealing effect of the airbag 61, avoiding the risk of leakage again due to pressure drop, and ensuring the stability of the pipeline during operation.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them.

Claims

1. A leak-proof structure for a pressurized pipeline in a chemical plant, characterized in that: It comprises a snap ring 1 (1) and a snap ring 2 (2): two threaded rods (3) are connected through the snap ring 1 (1) and the snap ring 2 (2), nuts (4) are connected through threads at the outer sides of the two threaded rods (3) corresponding to the top end of the snap ring 1 (1) and the bottom end of the snap ring 2 (2), and sealing pads (5) are bonded to the opposite surfaces of the snap ring 1 (1) and the snap ring 2 (2); A pneumatic detection mechanism (6) is fixedly installed inside the sealing gasket (5), and the pneumatic detection mechanism (6) comprises an air bag (61) fixedly installed between the sealing gasket (5) and the clamping ring (1). A connecting pipe (62) penetrating the clamping ring (1) is embedded and installed at the top of the air bag (61). A one-way valve (64) is fixedly installed at one end of the connecting pipe (62). A pressure gauge (63) is fixedly installed on the outside of the connecting pipe (62). A connecting cover (65) is fixedly installed at one end of the one-way valve (64). Guide pipes (66) are symmetrically embedded and installed on both sides of the connecting cover (65). An arc strip (67) is fixedly installed at one end of the guide pipe (66), and an extrusion strip (68) is movably connected inside the arc strip (67).

2. A leak-proof structure for pressurized pipelines in chemical plants according to claim 1, characterized in that: The arc strip (67) is fixedly installed inside the clamp ring (1), the shape of the extrusion strip (68) is an I-shaped strip, a slide groove is provided inside the arc strip (67), and the length and width of one end surface of the extrusion strip (68) are equal to the length and width of the slide groove.

3. A leak-proof structure for pressurized pipelines in chemical plants according to claim 2, characterized in that: A guide ring (69) is fixedly installed at one end of the extrusion strip (68) at equal distances, a cylinder (610) is slidably connected inside the guide ring (69), a disc (611) is clamped and installed at one end of the cylinder (610), a column (612) is clamped and installed at equal distances at the position of the disc (611) corresponding to one end of the guide ring (69), and an abutment disk (613) is clamped and installed at the other end of the cylinder (610).

4. A leak-proof structure for pressurized pipelines in chemical plants according to claim 2, characterized in that: The abutment disc (613) and the circular disc (611) have the same shape, and arc grooves are provided on the opposite back surfaces of the abutment disc (613) and the circular disc (611).

5. A leak-proof structure for pressurized pipelines in chemical plants according to claim 2, characterized in that: One end of the guide ring (69) is provided with circular holes at equal intervals, and the center lines of the circular holes and the center line of the column (612) are intersected.

6. A leak-proof structure for pressurized pipelines in chemical plants according to claim 1, characterized in that: The inner wall of the clamping ring (1) is symmetrically clamped with spring rods (7), the outer side of the spring rods (7) is fixedly mounted with a clamping block (8), and the bottom end of the clamping block (8) is fixedly mounted with a second magnet (10).

7. A leak-proof structure for pressurized pipelines in chemical plants according to claim 1, characterized in that: Limiting grooves (12) are symmetrically provided on both sides of the top of the second clamping ring (2), and a first magnet (9) is fixedly installed inside the limiting groove (12) at the top of the second clamping ring (2).

8. The leak-proof structure for pressurized pipelines in chemical plants according to claim 1, characterized in that: A positioning groove (11) is provided inside the clamping ring (1) at a position corresponding to the outer side of the clamping block (8), and the inner wall of the positioning groove (11) and the outer side of the clamping block (8) are in contact with each other.

9. A leak-proof structure for pressurized pipelines in chemical plants according to claim 7, characterized in that: The shape of the limiting groove (12) and the shape of the bottom end of the clamping block (8) are both isosceles trapezoids, the top end size of the limiting groove (12) is larger than the bottom end size, and the bottom end size of the clamping block (8) is smaller than the middle size.

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