Temporary plugging device for gas pipeline

Abstract

The utility model discloses a kind of gas pipeline temporary plugging devices, relate to gas pipeline construction technical field.The gas pipeline temporary plugging device, including the plugging disc for plugging gas pipeline mouth and plugging air bag connected on plugging disc.The utility model is provided with hook assembly, after hook assembly is connected with gas pipeline flange, can provide stable tension, when gas pressure promotes plugging mechanism, hook tightly pulls flange, greatly enhances the ability of plugging mechanism resistance pressure, effectively reduces the possibility of being pushed out, guarantee construction safety and pipeline normal operation advantage, to solve actual use, if adjusting mechanism is not adjusted in place, each fixed rod is not closely adhered to gas pipeline inner side wall, possibly leading to plugging mechanism and the connection of gas pipeline is not stable, thus only relying on the friction force of existing plugging mechanism itself and pipe inner wall is fixed, when facing larger pressure, still exist the risk of being pushed out.

Description

Technical Field

[0001] This utility model relates to the field of gas pipeline construction technology, specifically a temporary sealing device for gas pipelines. Background Technology

[0002] During the operation of gas pipeline systems, temporary sealing of specific pipe sections is often required for pipeline inspection, maintenance, and renovation to ensure isolation of the work area from the main gas transmission system, prevent gas leaks, and ensure personnel safety and smooth operation. This device features highly efficient sealing performance, employing sealing elements that can tightly conform to the inner wall of gas pipelines of different diameters, forming a reliable sealing barrier that effectively blocks gas flow.

[0003] For example, patent announcement number CN222479843U discloses a temporary pipeline sealing mechanism for gas engineering construction. By setting an adjustment mechanism and bolt fasteners, in practical applications, the cooperation between the above not only ensures the stability of each component of the device, but also increases the tightness of the device against the inner and outer surfaces of the gas pipeline, thereby preventing the device from being pushed out by gas pressure and ensuring the sealing effect on the gas pipeline.

[0004] In actual use, if the adjustment mechanism is not adjusted properly and the fixing rods are not tightly attached to the inner wall of the gas pipeline, the connection between the sealing mechanism and the gas pipeline may be unstable. As a result, the sealing mechanism may be fixed by friction between itself and the inner wall of the pipeline. Under greater pressure, there is still a risk of it being pushed out. Utility Model Content

[0005] This utility model provides a temporary gas pipeline sealing device, which has a hook assembly connected to the gas pipeline flange, providing a stable pulling force and ensuring construction safety and normal pipeline operation. It solves the problem that in actual use, if the adjustment mechanism is not properly adjusted and the fixing rods are not tightly attached to the inner wall of the gas pipeline, the connection between the sealing mechanism and the gas pipeline may be unstable. As a result, the existing sealing mechanism is fixed only by the friction between itself and the inner wall of the pipeline, and there is still a risk of it being pushed out when facing greater pressure.

[0006] To achieve a stable pulling force when connecting the hook assembly to the gas pipeline flange, ensuring construction safety and normal pipeline operation, this utility model provides the following technical solution: A temporary gas pipeline sealing device, comprising a sealing disc for sealing the gas pipeline opening and a sealing airbag connected to the sealing disc, wherein a gas pipeline flange is provided at the gas pipeline opening, and further comprising: a clamp plate disposed inside the gas pipeline, the clamp plate being disposed on one side of the sealing disc via a driving mechanism, and multiple clamp plates being arranged in a circular array around the central axis of the sealing disc; a hook assembly hooking onto the gas pipeline flange, the hook assembly being adjustablely disposed on the other side of the sealing disc, the number of hook assemblies being adapted to the number of clamp plates; and a limiting component disposed on the sealing disc, the limiting component being connected to the driving mechanism, used to limit the hook assembly while the driving mechanism drives the clamp plate to move.

[0007] Preferably, the drive mechanism includes a throttle, a driving bevel gear, multiple driven bevel gears, a screw, and a drive tube. The throttle is located at the center of the sealing disc and passes through the sealing disc via a sealed bearing. The driving bevel gear is located on the side of the sealing disc near the gas pipeline and is fixedly connected to one end of the throttle. The driven bevel gears are mounted on the surface of the sealing disc via bearing brackets. Multiple driven bevel gears are arranged in an array around the driving bevel gear, and all of the driven bevel gears mesh with the driving bevel gear. The number of the screw and drive tube is matched with the number of driven bevel gears. One end of the screw is fixedly connected to a driven bevel gear, and one end of the drive tube is threaded onto the surface of the other end of the screw. The other end of the drive tube is fixedly connected to a clamping plate. The limiting component guides the drive tube.

[0008] Preferably, the hook assembly includes a fixed hook, a hinge block, and a torsion spring. The hinge block is slidably disposed on the surface of the sealing disc. One end of the fixed hook is sleeved on the hinge shaft of the hinge block, and the other end of the fixed hook is connected to the surface of the gas pipeline flange. The torsion spring is sleeved on the hinge shaft of the hinge block, and both ends of the torsion spring are fixedly connected to the fixed hook and the hinge block, respectively.

[0009] Preferably, the surface of the sealing disc is provided with a sliding groove, the hinge block is slidably connected to the sliding groove, a bolt is inserted into the surface of the hinge block, and multiple threaded holes are provided on the inner sidewall of the sliding groove, with the bolt passing through the hinge block and threadedly connected to the threaded holes.

[0010] Preferably, the limiting assembly includes a connecting plate, a limiting rod, and a sealing shell. The surface of the sealing disc has a through groove. The connecting plate passes through the through groove and is fixedly connected to the surface of the drive tube. The limiting rod is adjustablely disposed on the surface of the connecting plate. The end of the limiting rod away from the connecting plate is in contact with the surface of the fixed hook. The sealing shell is fixedly disposed at the opening of the through groove on the surface of the sealing disc. The sealing shell is used to seal the through groove. The limiting rod passes through the sealing shell through a sealing ring.

[0011] Preferably, the limiting rod includes a sleeve, a lead screw, and a fixing rod. The sleeve is fixedly disposed on the surface of the connecting plate, the lead screw is threaded into the inside of the sleeve, and the fixing rod is fixedly disposed at the other end of the lead screw. The fixing rod is in contact with the surface of the fixing hook, and the surface of the fixing rod is provided with anti-slip texture.

[0012] Preferably, the surface of the sealing disc is provided with a movable groove, and a positioning element is adapted to be inserted into the interior of the movable groove. The positioning element is T-shaped and is inserted into the screw hole of the gas pipeline flange. The positioning element is used to position the sealing disc.

[0013] Compared with the prior art, this utility model provides a temporary gas pipeline sealing device, which has the following beneficial effects:

[0014] This temporary gas pipeline sealing device, through the installation of a hook assembly, provides a stable pulling force after being connected to the gas pipeline flange. When the gas pressure pushes the sealing mechanism, the hook tightly pulls the gas pipeline flange, forming a reverse restraining force, which greatly enhances the sealing mechanism's ability to resist pressure, effectively reducing the possibility of being pushed out, and ensuring construction safety and normal pipeline operation. This addresses the problem that in actual use, if the adjustment mechanism is not properly adjusted or the fixing rods are not tightly fitted to the inner wall of the gas pipeline, the connection between the sealing mechanism and the gas pipeline may be unstable, and the device may rely solely on the friction between the existing sealing mechanism and the inner wall of the pipeline for fixation, which still poses a risk of being pushed out under greater pressure. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0017] Figure 3 This is a schematic diagram showing the fixing hook of this utility model being fixed to a gas pipeline flange;

[0018] Figure 4 This is a schematic diagram of the sealing airbag part of this utility model;

[0019] Figure 5 This is a schematic diagram of the drive mechanism of this utility model.

[0020] Figure 6 This is a schematic diagram of the fixed hook of this utility model when it is opened.

[0021] In the diagram: 1. Sealing disc; 2. Sealing airbag; 3. Clamping plate; 4. Throttle; 5. Driving bevel gear; 6. Driven bevel gear; 7. Screw; 8. Drive tube; 9. Fixed hook; 10. Hinge block; 11. Torsion spring; 12. Slide groove; 13. Bolt; 14. Connecting plate; 15. Limiting rod; 1501. Sleeve; 1502. Lead screw; 1503. Fixed rod; 16. Sealing shell; 17. Through groove; 18. Movable groove; 19. Positioning component. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0023] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-6 The present invention will be further described below.

[0024] This utility model discloses a temporary gas pipeline sealing device, including a sealing disc 1 for sealing the gas pipeline opening and a sealing airbag 2 connected to the sealing disc 1. A gas pipeline flange is provided at the gas pipeline opening. The device also includes: a clamping plate 3 disposed inside the gas pipeline, the clamping plate 3 being disposed on one side of the sealing disc 1 by a driving mechanism, and multiple clamping plates 3 being arranged in a circular array around the central axis of the sealing disc 1; a hook assembly hooked onto the gas pipeline flange, the hook assembly being adjustablely disposed on the other side of the sealing disc 1, the number of hook assemblies being adapted to the number of clamping plates 3; and a limiting component disposed on the sealing disc 1, the limiting component being connected to the driving mechanism, and used to limit the hook assembly while the driving mechanism drives the clamping plate 3 to move.

[0025] Specifically, the drive mechanism includes a throttle 4, a driving bevel gear 5, multiple driven bevel gears 6, a screw 7, and a drive tube 8. The throttle 4 is located at the center of the sealing disc 1 and passes through the sealing disc 1 via a sealed bearing. The driving bevel gear 5 is located on the side of the sealing disc 1 closest to the gas pipeline and is fixedly connected to one end of the throttle 4. The driven bevel gears 6 are mounted on the surface of the sealing disc 1 via bearing brackets. Multiple driven bevel gears 6 are arranged in an array around the driving bevel gear 5, and all of the driven bevel gears 6 mesh with the driving bevel gear 5. The screw 7 and the drive tube 8 are matched with the number of driven bevel gears 6. One end of the screw 7 is fixedly connected to the driven bevel gear 6, and one end of the drive tube 8 is threaded onto the other end surface of the screw 7. The other end of the drive tube 8 is fixedly connected to the clamping plate 3, and the limiting component can guide the drive tube 8.

[0026] In this embodiment, rotating the handle 4 causes the drive bevel gear 5 to rotate. Then, the drive bevel gear 5 drives multiple driven bevel gears 6 around it to rotate. Then, the driven bevel gears 6 drive the screw 7 to rotate. The screw 7 drives the drive tube 8 to move under the guidance of the connecting plate 14, so that the drive tube 8 drives the clamping plate 3 to fit tightly against the inner wall of the gas pipe. This makes the multiple ring-shaped clamping plates 3 fit tightly against the inner wall of the gas pipe, thereby fixing the sealing disc 1 on the gas pipe.

[0027] Specifically, the hook assembly includes a fixed hook 9, a hinge block 10, and a torsion spring 11. The hinge block 10 is slidably disposed on the surface of the sealing disc 1. One end of the fixed hook 9 is sleeved on the hinge shaft of the hinge block 10, and the other end of the fixed hook 9 is connected to the surface of the gas pipeline flange. The torsion spring 11 is sleeved on the hinge shaft of the hinge block 10, and both ends of the torsion spring 11 are fixedly connected to the fixed hook 9 and the hinge block 10, respectively.

[0028] In this embodiment, while the drive pipe 8 moves, the limiting component drives the fixed hook 9 to rotate around the hinge axis of the hinge block 10, and at the same time pulls the torsion spring 11 to stretch elastically, so that the fixed hook 9 hooks onto the surface of the gas pipeline flange. Then the limiting rod 15 limits the fixed hook 9, thereby increasing the stability of the sealing plate 1 and making the fixation more secure.

[0029] Specifically, the surface of the sealing disc 1 is provided with a sliding groove 12, the hinge block 10 is slidably connected to the sliding groove 12, the surface of the hinge block 10 is inserted with a bolt 13, the inner side wall of the sliding groove 12 is provided with multiple threaded holes, and the bolt 13 passes through the hinge block 10 and is threadedly connected to the threaded holes.

[0030] In this embodiment, by tightening the bolt 13, the bolt 13 is disengaged from one of the threaded holes. Then, the hinge block 10 slides along the inner wall of the slide groove 12, thereby driving the fixed hook 9 to move to the position that matches the gas pipeline flange. Then, the bolt 13 is threadedly connected to one of its corresponding threaded holes to fix the hinge block 10, thereby enabling it to adapt to gas pipeline flanges of different sizes.

[0031] Specifically, the limiting assembly includes a connecting plate 14, a limiting rod 15, and a sealing shell 16. A through groove 17 is provided on the surface of the sealing disc 1. The connecting plate 14 passes through the through groove 17 and is fixedly connected to the surface of the drive tube 8. The limiting rod 15 is adjustablely set on the surface of the connecting plate 14. The end of the limiting rod 15 away from the connecting plate 14 is in contact with the surface of the fixed hook 9. The sealing shell 16 is fixedly set at the opening of the through groove 17 on the surface of the sealing disc 1. The sealing shell 16 is used to seal the through groove 17. The limiting rod 15 passes through the sealing shell 16 through a sealing ring.

[0032] In this embodiment, while the drive pipe 8 moves, it drives the connecting plate 14 to move along the inner wall of the through groove 17. The connecting plate 14 drives the limiting rod 15 to move. At this time, the fixed hook 9 is in an inclined open state under the action of the torsion spring 11. Then, during the movement of the limiting rod 15, it will squeeze the inclined fixed hook 9, drive the fixed hook 9 to rotate around the hinge axis of the hinge block 10, and at the same time pull the torsion spring 11 to stretch elastically, so that the fixed hook 9 hooks onto the surface of the gas pipeline flange. Then the limiting rod 15 limits the fixed hook 9, so that the fixed hook 9 can be driven by the power of the drive mechanism, making the fixing more convenient and reducing the operation steps. By setting the sealing shell 16, the through groove 17 can be sealed to ensure the sealing performance of the sealing plate 1.

[0033] Specifically, the limiting rod 15 includes a sleeve 1501, a lead screw 1502, and a fixing rod 1503. The sleeve 1501 is fixedly installed on the surface of the connecting plate 14. The lead screw 1502 is threaded into the inside of the sleeve 1501. The fixing rod 1503 is fixedly installed at the other end of the lead screw 1502. The fixing rod 1503 is in contact with the surface of the fixing hook 9. The surface of the fixing rod 1503 is provided with anti-slip texture.

[0034] In this embodiment, by turning the fixing rod 1503, the fixing rod 1503 drives the lead screw 1502 to rotate, and the lead screw 1502 moves along the inner thread of the sleeve 1501, thereby adjusting the length of the limiting rod 15 according to the position of the fixing hook 9, so that the limiting rod 15 fits the fixing hook 9. The surface of the fixing rod 1503 is provided with anti-slip texture to increase the friction with the hand.

[0035] Specifically, the surface of the sealing disc 1 is provided with a movable groove 18, and a positioning element 19 is adapted to be inserted into the inside of the movable groove 18. The positioning element 19 is T-shaped and is inserted into the screw hole of the gas pipeline flange. The positioning element 19 is used to position the sealing disc 1.

[0036] In this embodiment, the positioning element 19 is inserted into the screw hole of the gas pipeline flange to position the sealing plate 1, which facilitates subsequent fixing operations. The positioning element 19 can slide in the movable groove 18, thereby adapting to gas pipeline flanges of different sizes.

[0037] The working principle and usage process of this utility model are as follows: When in use, the sealing disc 1 is placed at the gas outlet, so that the sealing airbag 2 on the sealing disc 1 is inside the gas pipe. The positioning piece 19 is inserted into the screw hole of the gas pipe flange to position the sealing disc 1. Then, the handle 4 is turned, which drives the driving bevel gear 5 to rotate. Then, the driving bevel gear 5 drives the multiple driven bevel gears 6 around it to rotate. Then, the driven bevel gears 6 drive the screw 7 to rotate. The screw 7 drives the drive pipe 8 to move under the guidance of the connecting plate 14, so that the drive pipe 8 drives the clamping plate 3 to fit tightly against the inner wall of the gas pipe. The multiple ring-shaped clamping plates 3 fit tightly against the inner wall of the gas pipe, thereby fixing the sealing disc 1 on the gas pipe.

[0038] While the drive pipe 8 moves, it drives the connecting plate 14 to move along the inner wall of the through groove 17. The connecting plate 14 can guide the drive pipe 8 and drive the limiting rod 15 to move. At this time, the fixed hook 9 is in an inclined open state under the action of the torsion spring 11. Then, during the movement of the limiting rod 15, it will squeeze the inclined fixed hook 9, drive the fixed hook 9 to rotate around the hinge axis of the hinge block 10, and at the same time pull the torsion spring 11 to stretch elastically, so that the fixed hook 9 hooks onto the surface of the gas pipeline flange. Then the limiting rod 15 limits the fixed hook 9, thereby increasing the stability of the sealing plate 1 and making the fixation more secure. Then, the air pump is connected to the air extraction port on the sealing plate 1 to inflate the sealing airbag 2, so that the sealing airbag 2 expands and fits tightly against the inner wall of the gas pipeline, thereby sealing the gas pipeline.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A temporary gas pipeline sealing device, comprising a sealing disc (1) for sealing the gas pipeline opening and a sealing airbag (2) connected to the sealing disc (1), wherein a gas pipeline flange is provided at the gas pipeline opening, characterized in that, Also includes: A clamp (3) is installed inside the gas pipeline. The clamp (3) is installed on one side of the sealing plate (1) by a driving mechanism. Multiple clamps (3) are arranged in a ring array around the central axis of the sealing plate (1). A hook assembly that hooks onto a gas pipeline flange, the hook assembly being adjustablely positioned on the other side of the sealing disc (1), the number of the hook assembly being matched with the number of clamps (3); A limiting component is provided on the sealing plate (1). The limiting component is connected to the driving mechanism and is used to drive the clamp (3) to move while the limiting component limits the hook component.

2. The temporary sealing device for a gas pipeline according to claim 1, characterized in that: The drive mechanism includes a throttle (4), a driving bevel gear (5), multiple driven bevel gears (6), a screw (7), and a drive tube (8). The throttle (4) is located at the center of the sealing disc (1). The throttle (4) passes through the sealing disc (1) through a sealed bearing. The driving bevel gear (5) is located on the side of the sealing disc (1) near the gas pipeline. The driving bevel gear (5) is fixedly connected to one end of the throttle (4). The driven bevel gears (6) are located on the surface of the sealing disc (1) through a bearing bracket. Multiple driven bevel gears (6) are arranged in an array around the driving bevel gear (5). All of the multiple driven bevel gears (6) mesh with the driving bevel gear (5). The number of screws (7) and drive tubes (8) is matched with the number of driven bevel gears (6). One end of the screw (7) is fixedly connected to the driven bevel gear (6), one end of the drive tube (8) is threaded onto the surface of the other end of the screw (7), and the other end of the drive tube (8) is fixedly connected to the clamping plate (3). The limiting component can guide the drive tube (8).

3. A temporary gas pipeline sealing device according to claim 2, characterized in that: The hook assembly includes a fixed hook (9), a hinge block (10), and a torsion spring (11). The hinge block (10) is slidably disposed on the surface of the sealing disc (1). One end of the fixed hook (9) is sleeved on the hinge shaft of the hinge block (10), and the other end of the fixed hook (9) is connected to the surface of the gas pipeline flange. The torsion spring (11) is sleeved on the hinge shaft of the hinge block (10), and both ends of the torsion spring (11) are fixedly connected to the fixed hook (9) and the hinge block (10) respectively.

4. A temporary gas pipeline sealing device according to claim 3, characterized in that: The sealing disc (1) has a groove (12) on its surface. The hinge block (10) is slidably connected to the groove (12). A bolt (13) is inserted into the surface of the hinge block (10). The inner sidewall of the groove (12) has multiple threaded holes. The bolt (13) passes through the hinge block (10) and is threadedly connected to the threaded holes.

5. A temporary gas pipeline sealing device according to claim 2, characterized in that: The limiting assembly includes a connecting plate (14), a limiting rod (15), and a sealing shell (16). The surface of the sealing disc (1) is provided with a through groove (17). The connecting plate (14) passes through the through groove (17) and is fixedly connected to the surface of the drive tube (8). The limiting rod (15) is adjustablely set on the surface of the connecting plate (14). The end of the limiting rod (15) away from the connecting plate (14) is attached to the surface of the fixed hook (9). The sealing shell (16) is fixedly set at the opening of the through groove (17) on the surface of the sealing disc (1). The sealing shell (16) is used to seal the through groove (17). The limiting rod (15) passes through the sealing shell (16) through a sealing ring.

6. A temporary gas pipeline sealing device according to claim 5, characterized in that: The limiting rod (15) includes a sleeve (1501), a lead screw (1502) and a fixing rod (1503). The sleeve (1501) is fixedly disposed on the surface of the connecting plate (14). The lead screw (1502) is threaded into the inside of the sleeve (1501). The fixing rod (1503) is fixedly disposed at the other end of the lead screw (1502). The fixing rod (1503) is in contact with the surface of the fixing hook (9). The surface of the fixing rod (1503) is provided with anti-slip texture.

7. A temporary gas pipeline sealing device according to claim 1, characterized in that: The sealing disc (1) has a movable groove (18) on its surface. A positioning element (19) is inserted into the movable groove (18). The positioning element (19) is T-shaped and is inserted into the screw hole of the gas pipeline flange. The positioning element (19) is used to position the sealing disc (1).

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