A natural gas pipeline connection sealing detection device

Abstract

The present invention discloses a natural gas pipeline connection sealing detection device, which belongs to the field of sealing detection technology, and comprises two sealing hoops arranged opposite to each other, and one end of the adjacent sealing hoops is hinged by a hinge plate, and the inner cavity of the sealing hoop is detachably installed with an inner sealing sleeve. In the present invention, after the sealing hoop is set on the outside of the natural gas pipeline, the side gap can be filled by setting filling airbags on both sides, and the full contact angle with the inner sealing sleeve can be improved by the separated filling airbags to adapt to the processing error, and when the driving motor of the traction mechanism is working, the driving motor can drive the winding rod to rotate, and the rotation of the winding rod can tighten the traction belt, and the tightened traction belt can move the limit block inward after the filling ring arc groove is tightened, so that the closed ring can fully abut the inner closed sleeves on both sides and the filling airbag, and the detection gap is fully closed by the closed ring that can move inward, which is conducive to improving the test effect.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing detection, and in particular relates to a natural gas pipeline connection sealing detection device. Background Art

[0002] The sealing test of natural gas pipelines is an important step to ensure pipeline safety and gas quality. In order to ensure the safety of natural gas pipeline transportation, it is necessary to conduct sealing tests on the welding interfaces or leak repair locations of natural gas pipelines.

[0003] The invention patent of Chinese patent application publication number: CN113532766B discloses a pipeline sealing detection device and pipeline sealing detection method, wherein the pipeline sealing detection device includes: a mounting seat; an airbag, the airbag has a connection end arranged in the mounting seat, and a measuring end protruding from the mounting seat, the airbag is provided with an inflation port, and the measuring end is used to extend into the pipeline to be tested; a hydraulic injection structure is arranged at two ends of the airbag that are arranged oppositely in the length direction and is sealed with the airbag, the hydraulic injection structure has an input end and an output end, the output end is arranged near the measuring end, and is used to fill the pipeline to be tested with fluid; and a pressure detector is arranged on the hydraulic injection structure, and is used to detect the fluid pressure in the hydraulic injection structure. The pipeline sealing detection device and pipeline sealing detection method provided by the invention improve the efficiency of the sealing test, but in actual use, the independently arranged airbag can only perform insertion sealing on the pipeline with a smaller diameter, and after testing at the pipeline connection end position, it cannot fit well with the corresponding positions on both sides of the pipeline interface, which affects the sealing detection efficiency, and there is room for improvement. Summary of the invention

[0004] The purpose of the present invention is to propose a natural gas pipeline connection sealing detection device to solve the problem that after testing at the pipeline connection end, the corresponding positions on both sides of the pipeline interface cannot be well fitted, affecting the sealing detection efficiency.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A natural gas pipeline connection sealing detection device comprises two sealing hoops arranged opposite to each other, and one end of adjacent sealing hoops is hinged by a hinge plate, an inner sealing sleeve is detachably installed in the inner cavity of the sealing hoop, a plurality of limit and inflation components are equidistantly distributed along the axis of the sealing hoop inner cavity, and a traction mechanism is fitted between the plurality of limit and inflation components, a filling ring is connected to the rear side of the traction mechanism, and an arc groove for accommodating the limit and inflation component is provided on the inner side of the filling ring, gap filling components are provided at positions on both sides of the axis of the sealing hoop corresponding to the limit and inflation component and the sealing sleeve, and the ends of the sealing hoops on both sides away from the hinge plate are detachably connected by a connecting mechanism, a sliding support mechanism is connected to the end face side of the sealing hoop, and the sliding support mechanisms on both sides are arranged opposite to each other, and are used for filling the gap by the gap filling component to perform a sealing test.

[0007] As a further description of the above technical solution:

[0008] The limit inflation assembly includes a limit block, which is accommodated in an arc groove, and a traction mechanism is located between the limit block and the arc groove, a closed ring is installed on one side of the limit block, and the cross-sectional shape of the closed ring is an arc, and the closed ring is an elastic plastic part, and multiple closed rings form a semi-arc, and a penetration rod is connected to the side of the limit block away from the closed ring, and the penetration rod is penetrated in a through hole opened through the sealing hoop and the filling ring, and the other end of the penetration rod is connected to a threaded column through a telescopic rod, and the threaded column is threadedly connected to the outer peripheral side of the sealing hoop, and a first spring is provided on the outer wall of the telescopic rod, and both ends of the first spring are respectively connected to the threaded column and the corresponding positions on one side of the penetration rod.

[0009] As a further description of the above technical solution:

[0010] The shape of the limit block is arc-shaped, and the arc shape of the limit block matches the arc-shaped groove of the filling ring. The outer wall of the threaded column is threadedly connected to a threaded barrel, and the outer side of the threaded barrel is rotatably connected to a mounting plate through a bearing. The mounting plate is connected to the outside of the sealing hoop through connecting columns at both ends of one side, and a turntable is connected to the outer side of the threaded barrel for disassembly by moving the threaded column in the threaded barrel.

[0011] As a further description of the above technical solution:

[0012] A plurality of gas delivery nozzles are embedded inside the closed ring, and the gas delivery nozzles are connected to interfaces through pipelines and extend to the outside of the threaded column for connecting to sealing test gas delivery equipment.

[0013] As a further description of the above technical solution:

[0014] The gap filling assembly includes a plurality of filling airbags and a support ring, wherein the support ring is embedded between the sealing hoop and the filling ring, and the filling airbag is located on one side of the arc groove of the filling ring, the plurality of filling airbags form an arc portion matching the sealing hoop, and the end face of the filling airbag is connected with a slide plate, and the slide plate is slidably connected in a slide groove opened at a corresponding position on one side of the support ring, both ends of the support ring are connected with a snap seat, both ends of the inner sealing sleeve are connected with a snap, and the inner closing seat is detachably connected to the snap seat through the snap.

[0015] As a further description of the above technical solution:

[0016] A force-bearing ball is connected to one side of the slide away from the slide groove, and the force-bearing ball is located at the bottom side of the closed ring. The closed ring moves inward to push the force-bearing ball and the filling airbag to close the gap between the inner sealing sleeve and the sealing hoop.

[0017] As a further description of the above technical solution:

[0018] The traction mechanism includes a traction belt, which is embedded between the filling ring and the limit block, and the end of the traction belt is wound and connected with a winding rod, and the other end of the traction belt is connected to one side of the end of the inner cavity of the filling ring, one end of the winding rod is transmission-connected with a driving motor, and the driving motor is installed on one side of the inner cavity of the sealing hoop, and one side of the traction belt is provided with a accommodating groove for the penetration of the penetration rod, which is used for the winding rod to rotate and wind the traction belt.

[0019] As a further description of the above technical solution:

[0020] The connecting mechanism includes a clamping seat and an insert block, and the clamping seat is connected to one side of the side wall of the sealing hoop, and the insert block is connected to one side of the side wall of the other side of the sealing hoop. The insert block and the clamping seat are clamped, and a threaded cap is embedded in the inner cavity of the clamping seat, and a fastening column is connected in the threaded cap, and the fastening column is limitedly connected to one side of the insert block.

[0021] As a further description of the above technical solution:

[0022] The sliding support mechanism includes a support seat, the support seat is connected to the corresponding position on the end face side of the sealing ring away from the hinge plate, a roller is slidably connected to the inner cavity of the support seat, one end of the roller is connected to a sliding rod, the sliding rod is slidably connected in a sliding hole opened on one side of the support seat, a second spring is sleeved on the outer wall of the sliding rod, and two ends of the second spring are respectively connected to the roller and the corresponding positions on one side of the inner cavity of the support seat.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0024] 1. In the present invention, the gap filling component is designed, and after being arranged on the outside of the natural gas pipeline through the sealing hoop, the side gaps can be filled by arranging filling airbags on both sides. The separate filling airbags can improve the full contact angle with the inner sealing sleeve and adapt to the processing error. When the driving motor of the traction mechanism is working, the driving motor can drive the winding rod to rotate, and the rotation of the winding rod can tighten the traction belt. The tightened traction belt can move the limit block inward after the arc groove of the filling ring is tightened, and make the closed ring fully abut the inner closing sleeves on both sides and the filling airbags. The detection gap is fully closed by the closed ring that can move inward, which is beneficial to improve the test effect.

[0025] 2. In the present invention, through the designed limit block and threaded column, the arc-shaped limit block can press the traction belt into the arc-shaped groove inside the filling ring. When the traction belt is tightened, the limit block can be separated from the arc-shaped groove by controlling the expansion of the traction belt in the arc-shaped groove. The push rod penetration rod moves in the sealing hoop through the telescopic rod. The movement can adapt to the slight changes in the diameter of the natural gas pipeline caused by temperature changes or installation reasons. The corresponding limit inflation resistance piece is replaced after the threaded barrel is screwed out through the threaded column to improve applicability. After connecting the barometer and the external pressurized gas transmission equipment, gas is transmitted into the sealing hoop, and the air tightness of the pipeline is judged by the pressure value of the barometer to meet the requirements.

[0026] 3. In the present invention, the closing ring can squeeze the side wall force ball when moving inward, and the force ball can drive the filling airbag and the slide plate to slide in the inner slide groove of the support ring after being squeezed. When the slide plate moves, it can drive the filling airbag to move along the axial direction of the sealing hoop. After the filling airbag moves, it can fully fill the gap between the inner closing sleeve and the sealing hoop. The conical setting of the inner closing sleeve improves the sealing effect of the filling airbag after displacement, and improves the stability of the natural gas pipeline sealing detection.

[0027] 4. In the present invention, when the sealing hoop is sleeved on the outside of the natural gas pipeline, the sealing hoop is rotated around the hinged plate and then inserted into the card seat at the corresponding position through the plug block. When the plug block is coupled with the card seat, the bottom end of the fastening column can be fully fitted with the plug block by tightening the threaded fastening column, thereby improving the stability of the sealing hoop connection. When the gap filling component is not in sufficient contact with the natural gas pipeline, the sealing hoop can be pulled to drive one side roller to move on the surface of the natural gas pipeline, and the sealing hoop can be pulled to adjust the position outside the natural gas pipeline, which is conducive to meeting the detection and processing needs at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0029] Figure 2This is a schematic diagram of the lateral structure of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0030] Figure 3 The present invention proposes Figure 2 The structural diagram of the enlarged part A in the middle;

[0031] Figure 4 This is a schematic diagram of the disassembled structure of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the disassembled structure of a gap filling component of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0033] Figure 6 This is a schematic diagram of the overall structure of a limit-filling assembly of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0034] Figure 7 A schematic diagram of the lateral structure of a limit-filling assembly of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0035] Figure 8 A schematic diagram of a transverse half-section structure of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0036] Fig. 9 The present invention proposes Figure 8 The enlarged structural diagram of part B in the middle;

[0037] Fig.10 A schematic diagram of a side half-section structure of a natural gas pipeline connection sealing detection device proposed by the present invention;

[0038] Fig.11 This is a schematic diagram of the inner side assembly structure of a sealing hoop of a natural gas pipeline connection sealing detection device proposed by the present invention.

[0039] Legend:

[0040] 1. Sealing hoop; 2. Inner sealing sleeve; 3. Gap filling assembly; 301. Filling airbag; 302. Slide plate; 303. Force ball; 304. Support ring; 305. Slide groove; 306. Buckle seat; 4. Traction mechanism; 401. Traction belt; 402. Accommodation groove; 403. Winding rod; 404. Driving motor; 5. Filling ring; 6. Limiting inflation assembly; 601. Limiting block; 602. Closing ring; 603. Wearing rod; 604. Mounting plate; 605. Connecting column; 606. Turntable; 607. Threaded column; 608. Gas delivery nozzle; 7. Connecting mechanism; 701. Snap-fit ​​seat; 702. Insert block; 703. Fastening column; 8. Sliding support mechanism; 801. Support seat; 802. Roller; 803. Second spring; 804. Sliding rod; 9. Articulated plate. DETAILED DESCRIPTION

[0041] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 11 The present invention provides a technical solution: a natural gas pipeline connection sealing detection device, comprising two sealing hoops 1 arranged opposite to each other, and one end of the adjacent sealing hoops 1 is hinged by a hinge plate 9, an inner sealing sleeve 2 is detachably installed in the inner cavity of the sealing hoop 1, a plurality of limit-inflatable components 6 are equidistantly distributed in the inner cavity of the sealing hoop 1 along the axis, and a traction mechanism 4 is fitted between the plurality of limit-inflatable components 6, a filling ring 5 is connected to the rear side of the traction mechanism 4, and an arc groove for accommodating the limit-inflatable component 6 is opened on the inner side of the filling ring 5, gap filling components 3 are arranged at positions corresponding to both sides of the axis of the sealing hoop 1 between the limit-inflatable component 6 and the sealing sleeve, and the ends of the sealing hoops 1 on both sides away from the hinge plate 9 are detachably connected by a connecting mechanism 7, a sliding support mechanism 8 is connected to the end face side of the sealing hoop 1, and the sliding support mechanisms 8 on both sides are arranged opposite to each other, and are used to fill the gap through the gap filling component 3 for sealing test;

[0043] The limiting inflation assembly 6 includes a limiting block 601, which is accommodated in an arc groove, and the traction mechanism 4 is located between the limiting block 601 and the arc groove, a closed ring 602 is installed on one side of the limiting block 601, and the cross-sectional shape of the closed ring 602 is an arc, and the closed ring 602 is an elastic plastic part, and multiple closed rings 602 form a semi-arc, and a penetration rod 603 is connected to the side of the limiting block 601 away from the closed ring 602, and the penetration rod 603 is penetrated in the through hole opened through the sealing hoop 1 and the filling ring 5, and the other end of the penetration rod 603 is connected to a threaded column 607 through a telescopic rod, and the threaded column 607 is threadedly connected to the outer peripheral side of the sealing hoop 1, and a first spring is provided on the outer wall of the telescopic rod, and the two ends of the first spring are respectively connected to the corresponding positions of the threaded column 607 and one side of the penetration rod 603.

[0044] The shape of the limit block 601 is arc-shaped, and the arc shape of the limit block 601 matches the arc-shaped groove of the filling ring 5. The outer wall of the threaded column 607 is threadedly connected to a threaded barrel, and the outer side of the threaded barrel is rotatably connected to a mounting plate 604 through a bearing. The mounting plate 604 is connected to the outside of the sealing hoop 1 through connecting columns 605 at both ends of one side, and a turntable 606 is connected to the outer side of the threaded barrel for disassembly by moving the threaded column 607 in the threaded barrel. A plurality of gas delivery nozzles 608 are embedded on the inner side of the closing ring 602, and the gas delivery nozzles 608 are connected to an interface through a pipeline and extend to the outside of the threaded column 607 for connecting to a sealing test gas delivery device.

[0045] Specifically, through the designed limit block 601 and threaded column 607, the arc-shaped limit block 601 can press the traction belt 401 into the arc-shaped groove inside the filling ring 5. Therefore, when the traction belt 401 is tightened, the limit block 601 can be separated from the arc-shaped groove by controlling the expansion of the traction belt 401 in the arc-shaped groove, so that the push rod piercing rod 603 can move in the sealing hoop 1 through the telescopic rod, and can adapt to slight changes in the diameter of the natural gas pipeline due to temperature changes or installation reasons through movement. Moreover, through the designed telescopic rod and the first spring, after the piercing rod 603 moves, the first spring can pull the piercing rod 603 to return to its original position when the traction belt 401 is relaxed. , and through the designed threaded column 607, the threaded column 607 can be adjusted to the corresponding position on the inner side of the sealing hoop 1 through the threaded tube, which is conducive to adjusting and matching the changes in the pipeline size. At the same time, the threaded tube can be screwed out through the threaded column 607 to replace the corresponding limit-filling resistance component, thereby improving applicability. In addition, through the designed buckle seat 306 and the inner sealing sleeve, the inner sealing sleeve can be replaced to adjust the inner diameter size to match the natural gas pipeline. In addition, through the designed gas delivery nozzle 608, gas can be delivered to the sealing hoop 1 after connecting a barometer and an external pressurized gas delivery device, and the air tightness of the pipeline can be judged by the pressure value of the barometer whether it meets the requirements.

[0046] See also Figure 4-Figure 5The gap filling component 3 includes a plurality of filling airbags 301 and a support ring 304. The support ring 304 is embedded between the sealing hoop 1 and the filling ring 5, and the filling airbag 301 is located on one side of the arc groove of the filling ring 5. The plurality of filling airbags 301 form an arc portion matching the sealing hoop 1, and the end surface of the filling airbag 301 is connected with a slide plate 302, and the slide plate 302 is slidably connected in a slide groove 305 opened at a corresponding position on one side of the support ring 304. Both ends of the support ring 304 are connected with a buckle seat 306, both ends of the inner sealing sleeve 2 are connected with buckles, and the inner closing seat is detachably connected to the buckle seat 306 through the buckle, and the side of the slide plate 302 away from the slide groove 305 is connected with a force-bearing ball 303, and the force-bearing ball 303 is connected to the inner sealing sleeve 2. 03 is located at the bottom side of the closed ring 602, and the closed ring 602 moves inward to push the force-bearing ball 303 and the filling airbag 301 to close the gap between the inner sealing sleeve 2 and the sealing hoop 1. The traction mechanism 4 includes a traction belt 401, and the traction belt 401 is embedded between the filling ring 5 and the limit block 601, and the end of the traction belt 401 is wound and connected with a winding rod 403, and the other end of the traction belt 401 is connected to one side of the end of the inner cavity of the filling ring 5, one end of the winding rod 403 is transmission-connected with a driving motor 404, and the driving motor 404 is installed on one side of the inner cavity of the sealing hoop 1, and a accommodating groove 402 for the penetration of the penetration rod 603 is opened on one side of the traction belt 401, which is used for the winding rod 403 to rotate and wind the traction belt 401.

[0047] Specifically, the gap filling component 3 is designed, and after being sleeved on the outside of the natural gas pipeline through the sealing hoop 1, the side gaps can be filled by setting filling airbags 301 on both sides. The separate filling airbags 301 can improve the full contact angle with the inner sealing sleeve 2 and adapt to the processing error. When the driving motor 404 of the traction mechanism 4 is working, the driving motor 404 can drive the winding rod 403 to rotate. The rotation of the winding rod 403 can tighten the traction belt 401. The tightened traction belt 401 can move the limit block 601 inward after the arc groove of the filling ring 5 is tightened, and the closed ring 602 can fully abut the inner closed sleeves on both sides and the filling airbags 301, so that the detection gap can be fully closed by the closed ring 602 that can move inward, which is conducive to improving the test effect. In addition, the designed flexible closed ring 602 can cause the closed ring 602 to collapse and fit when moving inward due to its own flexibility, thereby improving the driving effect of the tightened traction belt 401 on the penetration rod 603 and the closed rod.

[0048] Furthermore, the closing ring 602 can squeeze the side wall force ball 303 when moving inward, and the force ball 303 can drive the filling airbag 301 and the slide plate 302 to slide in the inner slide groove 305 of the support ring 304 after being squeezed. When the slide plate 302 moves, it can drive the filling airbag 301 to move along the axial direction of the sealing hoop 1. After the filling airbag 301 moves, it can fully fill the gap between the inner closing sleeve and the sealing hoop 1. In another embodiment, the conical setting of the inner closing sleeve is used to improve the sealing effect of the filling airbag 301 after displacement, thereby further improving the stability of the natural gas pipeline sealing detection.

[0049] See also Figure 8 The connecting mechanism 7 includes a clamping seat 701 and an insert block 702, and the clamping seat 701 is connected to one side of the side wall of the sealing hoop 1, and the insert block 702 is connected to one side of the side wall of the sealing hoop 1 on the other side. The insert block 702 and the clamping seat 701 are clamped, and a threaded cap is embedded in the inner cavity of the clamping seat 701, and a fastening column 703 is connected in the threaded cap, and the fastening column 703 is limitedly connected to one side of the insert block 702. The sliding support mechanism 8 includes a support seat 801, and the support seat 801 is connected to the corresponding position of the end face side of the sealing hoop 1 away from the hinge plate 9, and the inner cavity of the support seat 801 is slidably connected with a roller 802, and one end of the roller 802 is connected to a sliding rod 804, and the sliding rod 804 is slidably connected to a sliding hole opened on one side of the support seat 801. The outer wall of the sliding rod 804 is provided with a second spring 803, and the two ends of the second spring 803 are respectively connected to the corresponding positions of the roller 802 and the inner cavity of the support seat 801.

[0050] Specifically: through the designed connecting mechanism 7, when the sealing hoop 1 is sleeved on the outside of the natural gas pipeline, the sealing hoop 1 can be rotated around the hinged plate 9 and then inserted into the corresponding position of the clamping seat 701 through the plug block 702. When the plug block 702 is coupled with the clamping seat 701, the bottom end of the fastening column 703 can be fully fitted with the plug block 702 by tightening the threaded fastening column 703, thereby improving the stability of the connection of the sealing hoop 1. Moreover, through the designed sliding support mechanism 8, when the gap filling component 3 is not in sufficient contact with the natural gas pipeline, the sealing hoop 1 can be pulled to drive one side roller 802 to move on the surface of the natural gas pipeline, thereby pulling the sealing hoop 1 to adjust the position outside the natural gas pipeline, which is conducive to adapting to the detection and processing needs of different positions.

[0051] Working principle: When in use, the arc-shaped limit block 601 presses the traction belt 401 into the arc-shaped groove inside the filling ring 5. Therefore, when the traction belt 401 is tightened, the limit block 601 is separated from the arc-shaped groove by the expansion control of the traction belt 401 in the arc-shaped groove, so that the push rod penetration rod 603 moves in the sealing hoop 1 through the telescopic rod, and adapts to the slight changes in the diameter of the natural gas pipeline due to temperature changes or installation reasons through movement. Through the designed telescopic rod and the first spring, after the penetration rod 603 moves, when the traction belt 401 is relaxed, the first spring pulls the penetration rod 603 to reset. Through the designed threaded column 607, the threaded column 607 is adjusted to the corresponding position on the inner side of the sealing hoop 1 through the threaded tube to match the change in the pipeline size. After the threaded tube is screwed out through the threaded column 607, the corresponding limit inflatable resistance is replaced;

[0052] After the sealing hoop 1 is sleeved on the outside of the natural gas pipeline, the side gaps are filled by setting filling airbags 301 on both sides. The separate filling airbags 301 increase the full contact angle with the inner sealing sleeve 2 to adapt to the processing error. When the driving motor 404 of the traction mechanism 4 is working, the driving motor 404 drives the winding rod 403 to rotate, and the rotation of the winding rod 403 tightens the traction belt 401. The tightened traction belt 401 moves the limit block 601 inward after the arc groove of the filling ring 5 is tightened, so that the closed ring 602 fully abuts against the inner closed sleeves on both sides and the filling airbags 301, and the closed ring 602 moving inward fully closes the detection gap;

[0053] When the closed ring 602 moves inward, it squeezes the side wall force ball 303. After being squeezed, the force ball 303 drives the filling airbag 301 and the slide plate 302 to slide in the inner slide groove 305 of the support ring 304. When the slide plate 302 moves, it drives the filling airbag 301 to move along the axis direction of the sealing hoop 1. After the filling airbag 301 moves, it fully fills the gap between the inner closed sleeve and the sealing hoop 1.

[0054] When the sealing hoop 1 is sleeved on the outside of the natural gas pipeline, the sealing hoop 1 is rotated around the hinge plate 9 and then inserted into the corresponding position of the clamping seat 701 through the plug block 702. When the plug block 702 is coupled with the clamping seat 701, the threaded fastening column 703 is tightened to make the bottom end of the fastening column 703 fully fit with the plug block 702. When the gap filling component 3 is not in sufficient contact with the natural gas pipeline, the sealing hoop 1 is pulled to drive one side roller 802 to move on the surface of the natural gas pipeline, thereby pulling the sealing hoop 1 to adjust the position outside the natural gas pipeline.

[0055] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A natural gas pipeline connection sealing detection device, comprising two sealing hoops (1) arranged opposite to each other, wherein one end of adjacent sealing hoops (1) is hingedly connected via a hinge plate (9), characterized in that: The inner cavity of the sealing hoop (1) is detachably provided with an inner sealing sleeve (2), the inner cavity of the sealing hoop (1) is equidistantly provided with a plurality of limit-inflatable components (6) circumferentially, and a traction mechanism (4) is fitted between the plurality of limit-inflatable components (6), the rear side of the traction mechanism (4) is connected with a filling ring (5), and the inner side of the filling ring (5) is provided with an arc groove for accommodating the limit-inflatable component (6), gap filling components (3) are provided at positions corresponding to both sides of the axis of the sealing hoop (1) between the limit-inflatable component (6) and the sealing sleeve, and the ends of the sealing hoops (1) on both sides away from the hinge plate (9) are detachably connected via a connecting mechanism (7), the end face side of the sealing hoop (1) is connected with a sliding support mechanism (8), and the sliding support mechanisms (8) on both sides are arranged opposite to each other and are used to fill the gap through the gap filling component (3) for sealing testing; The limit inflation assembly (6) comprises a limit block (601), the limit block (601) is accommodated in the arc groove, and the traction mechanism (4) is located between the limit block (601) and the arc groove, a closed ring (602) is installed on one side of the limit block (601), and the cross-sectional shape of the closed ring (602) is an arc, and the closed ring (602) is an elastic plastic part, and the plurality of closed rings (602) form a semi-arc, and the limit block (601) is away from the closed ring (602). ) is connected to one side of the sealing ring (1) with a penetration rod (603), and the penetration rod (603) is penetrated in a through hole formed through the sealing ring (1) and the filling ring (5), and the other end of the penetration rod (603) is connected to a threaded column (607) via a telescopic rod, and the threaded column (607) is threadedly connected to the outer peripheral side of the sealing ring (1), and a first spring is sleeved on the outer wall of the telescopic rod, and the two ends of the first spring are respectively connected to the threaded column (607) and corresponding positions on one side of the penetration rod (603); The shape of the limit block (601) is arc-shaped, and the arc shape of the limit block (601) matches the arc-shaped groove of the filling ring (5); the outer wall of the threaded column (607) is threadedly connected to a threaded barrel, and the outer side of the threaded barrel is rotatably connected to a mounting plate (604) via a bearing; the mounting plate (604) is connected to the outside of the sealing hoop (1) via connecting columns (605) at both ends of one side, and a rotary disk (606) is connected to the outer side of the threaded barrel for disassembly by moving the threaded column (607) in the threaded barrel; A plurality of gas delivery nozzles (608) are embedded inside the closed ring (602), and the gas delivery nozzles (608) are connected to interfaces through pipelines and extend to the outside of the threaded column (607) for connecting to a sealing test gas delivery device; The gap filling assembly (3) comprises a plurality of filling airbags (301) and a support ring (304); the support ring (304) is embedded between the sealing hoop (1) and the filling ring (5), and the filling airbag (301) is located on one side of the arc groove of the filling ring (5); the plurality of filling airbags (301) form an arc portion matching the sealing hoop (1), and the end surface of the filling airbag (301) is connected to a slide plate (302); the slide plate (302) is slidably connected to a slide groove (305) provided at a corresponding position on one side of the support ring (304); both ends of the support ring (304) are connected to buckle seats (306); both ends of the inner sealing sleeve (2) are connected to buckles, and the inner sealing seat is detachably connected to the buckle seat (306) via the buckle; A force-bearing ball (303) is connected to the side of the slide plate (302) away from the slide groove (305), and the force-bearing ball (303) is located at the bottom side of the closed ring (602). The closed ring (602) moves inward to push the force-bearing ball (303) and the filling airbag (301) to close the gap between the inner sealing sleeve (2) and the sealing hoop (1); The traction mechanism (4) comprises a traction belt (401), the traction belt (401) being embedded between the filling ring (5) and the limit block (601), and the end of the traction belt (401) being wound and connected with a winding rod (403), and the other end of the traction belt (401) being connected to one side of the end of the inner cavity of the filling ring (5), one end of the winding rod (403) being transmission-connected with a driving motor (404), and the driving motor (404) being installed on one side of the inner cavity of the sealing hoop (1), and a receiving groove (402) for the penetration of the penetration rod (603) being provided on one side of the traction belt (401), so as to be used for the winding rod (403) to rotate and wind the traction belt (401).

2. A natural gas pipeline connection sealing detection device according to claim 1, characterized in that: The connecting mechanism (7) comprises a clamping seat (701) and an insert block (702), wherein the clamping seat (701) is connected to one side of a side wall of the sealing hoop (1), and the insert block (702) is connected to the other side of a side wall of the sealing hoop (1), the insert block (702) and the clamping seat (701) are clamped together, and a threaded cap is embedded in the inner cavity of the clamping seat (701), and a fastening column (703) is connected inside the threaded cap, and the fastening column (703) is limit-connected to one side of the insert block (702).

3. A natural gas pipeline connection sealing detection device according to claim 1, characterized in that: The sliding support mechanism (8) comprises a support seat (801), the support seat (801) being connected to a corresponding position on the end face side of the sealing hoop (1) away from the hinge plate (9), a roller (802) being slidably connected to the inner cavity of the support seat (801), one end of the roller (802) being connected to a sliding rod (804), the sliding rod (804) being slidably connected to a sliding hole opened on one side of the support seat (801), a second spring (803) being sleeved on the outer wall of the sliding rod (804), and two ends of the second spring (803) being respectively connected to the roller (802) and corresponding positions on one side of the inner cavity of the support seat (801).

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