Plugging butt joint device for pipeline pressure bearing test

Abstract

The utility model is applicable to the technical field of pipeline plugging, and provides a plugging butt joint device for a pipeline pressure bearing test, which comprises two support frames, the two support frames are tensioned through a detachable chain, each support frame is provided with a plugging head, the outer ring surface of each plugging head is provided with a step-shaped annular butt joint position, and the annular butt joint position is provided with an annular butt joint groove. The two plugging heads move towards the inner side to plug the two ends of the pipeline and abut against the pipeline. According to the plugging butt joint device for the pipeline pressure bearing test, the two supporting frames capable of being tensioned are arranged, each supporting frame is provided with a conical plugging head with the small front portion and the large rear portion, and when the two supporting frames are pulled close, the two plugging heads move towards the inner side to plug the two ends of a pipeline and abut against the two ends of the pipeline; compared with a traditional pipeline fixing mode, the fixing mode of the device is simpler, and the working time is saved; and a plurality of step-shaped annular butt joint positions of which the outer diameters are gradually increased are formed on the outer ring surface of the plugging head from front to back, so that the plugging head can be adaptive to pipelines with different calibers, and the adaptability of the device is improved.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline plugging technology, and in particular relates to a plugging and docking device for pipeline pressure testing. Background Technology

[0002] As one of the most widely used basic components, pipelines must undergo a water pressure test before they are manufactured and installed. This test verifies the quality of the pipe wall, the strength of the joints, and the airtightness of the entire pipeline. During the test, a specialized water pressure testing machine is used to pressurize the pipeline. One end of the pipeline is sealed inside the water pressure machine, and the other end is mechanically sealed. Water pressure is output into the pipeline through the water pressure machine and held statically for a period of time under certain pressure conditions to verify the quality and service condition of the pipeline.

[0003] Chinese Patent Publication No. CN105546267A discloses a pipe pressure testing and sealing device. This device uses a pipe cap and a pipe fixing clamp. During the pressure test, the pipe fixing clamp is first fixed to the pipe, and then the pipe cap is fitted onto the end of the pipe and secured to the clamp. A sealing ring is used for sealing, effectively preventing leakage when water pressure is applied. The entire testing process requires no welding, thus eliminating the need for subsequent stress relief. This sealing device is quick to install and easy to disassemble, shortening the installation time and reducing testing costs. It also causes minimal damage to the pipe surface and is reusable. However, the pipe cap cannot be fitted to pipes of different diameters, resulting in low compatibility. Furthermore, the method of fixing the pipe cap to the pipe end using multiple screws is time-consuming in actual operation. Utility Model Content

[0004] This utility model provides a sealing and docking device for pipeline pressure testing, aiming to solve the problem that the existing sealing device for internal pipeline water pressure testing cannot be adapted to the ends of pipelines with different diameters, resulting in low adaptability; and that the sealing device in this device fixes the pipeline port by tightening multiple screws, which is time-consuming in actual operation.

[0005] This utility model is implemented as follows: a sealing and docking device for pipeline pressure testing includes two support frames, which are tightened by a detachable chain. Each support frame is provided with a sealing head that can move horizontally. The two sealing heads are arranged horizontally and symmetrically. The sealing head is conical with a smaller front and a larger rear, and the outer ring surface of the sealing head has multiple stepped annular docking positions with gradually increasing outer diameters from front to back. The two sealing heads can be moved inward to seal both ends of the pipeline and press them together. The front end of one sealing head has a first through groove extending to its rear end, and the rear end of the sealing head is connected to a delivery pipe. The front end of the other sealing head has a second through groove extending to its rear end, and the rear end of the sealing head is connected to an output pipe. The front end of the second through groove is connected to a flexible hose, and a pressure gauge connected to a pressure gauge buffer pipe is provided on the sealing head.

[0006] Preferably, each of the support frames is fixedly connected to two sides with retaining rings, and the two retaining rings are connected and tightened by a detachable chain to tighten the two support frames.

[0007] Preferably, the chain is divided into two sections, and a turnbuckle is provided between the two sections of the chain.

[0008] Preferably, the support frame is provided with a movable plate, and a first threaded rod is connected to the movable plate through a transverse thread. The inner end of the first threaded rod is rotatably connected to the rear end of one of the sealing heads, and a first handwheel is provided at the outer end of the first threaded rod.

[0009] Preferably, a guide rod is fixedly connected to the rear end of the sealing head, and a movable groove is provided inside the movable plate. The other end of the guide rod extends rearward into the movable groove and slides inside it.

[0010] Preferably, the support frame has a hollow structure inside, the movable plate can move up and down along the cavity inside the support frame, and a second threaded rod is vertically threaded to the top of the support frame, with a second handwheel provided at the top of the second threaded rod.

[0011] Preferably, the support frame has vertical grooves on both sides inside, and the movable plate has limiting plates on the front and rear sides that are adapted to the inside of the grooves.

[0012] Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The sealing and docking device for pipeline pressure testing of this utility model is provided by setting two tensionable support frames, each of which is equipped with a conical sealing head that is smaller at the front and larger at the back. When the two support frames are pulled closer, the two sealing heads move inward to seal the two ends of the pipeline and press them together. Compared with the traditional method of fixing the pipeline, the fixing method of this device is simpler and saves working time. In addition, the outer ring surface of the sealing head has multiple stepped annular docking positions with gradually increasing outer diameters from front to back, which can adapt to pipelines of different diameters and improve the adaptability of the device. Attached Figure Description

[0014] Figure 1 This is a front sectional view of the present invention;

[0015] Figure 2 This is the front view of the present invention;

[0016] Figure 3 This is a schematic diagram showing the chain and pipe after they have been removed in this utility model;

[0017] Figure 4 This is a top view of the present invention;

[0018] Figure 5 This is a side view of the present invention;

[0019] Figure 6 This utility model Figure 1 Enlarged view of point A in the image.

[0020] In the diagram: 1-Support frame, 2-Second threaded rod, 3-Second handwheel, 4-Sealing head, 5-Sealing ring, 6-Pipe, 7-Conveying pipe, 8-Output pipe, 9-Chain, 10-Turn screw, 11-First threaded rod, 12-First handwheel, 13-Guide rod, 14-Moving plate, 15-Limiting plate, 16-Snap ring, 17-Hose, 18-Limiting ring, 19-Baffle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] First Embodiment

[0023] Please see Figure 1 , Figure 2 and Figure 4This utility model provides a technical solution: a sealing and docking device for pipeline pressure testing, including two support frames 1, which are tightened by a detachable chain 9. Each support frame 1 is provided with a sealing head 4 that can move horizontally. The two sealing heads 4 are arranged horizontally and symmetrically. The sealing head 4 is conical with a smaller front and a larger rear. The outer ring surface of the sealing head 4 has multiple stepped annular docking positions with gradually increasing outer diameters from front to back. The two sealing heads 4 can be moved inward to seal both ends of the pipeline 6 and press them together. The front end of one sealing head 4 has a first through groove extending to its rear end. The rear end of the sealing head 4 is connected to a delivery pipe 7. The front end of the other sealing head 4 has a second through groove extending to its rear end. The rear end of the sealing head 4 is connected to an output pipe 8. The front end of the second through groove is connected to a flexible hose 17. A pressure gauge connected to a pressure gauge buffer pipe is provided on the sealing head 4.

[0024] In this embodiment, the support frame 1 provides support for the sealing head 4 perpendicular to the ground to ensure that the sealing head 4 does not shift when moving horizontally. When sealing the pipe 6, the front end of the sealing head 4 extends into the inner cavity of the pipe 6, and the end of the pipe 6 gradually abuts against an annular mating position on the sealing head 4 that matches its diameter. A sealing ring 5 is provided at the edge of the annular mating position at the end of the pipe 6. After the sealing head 4 seals the pipe 6, the delivery pipe 7 is used to connect to an external water pipe or gas pipe. Water or gas flows into the first channel through the delivery pipe 7 and into the inner cavity of the pipe 6. Then, the test pressure is set, and the pressure gauge is observed and the pipe 6 is checked for leaks. The output pipe 8 is used to discharge the water or gas in the pipe 6. It should be noted that the outlet end of the output pipe 8 can be connected to an air pump. When the air pump starts working, the test water or gas in the pipe 6 is sucked into the second channel through the hose 17, then flows into the output pipe 8 and finally discharged outside the device.

[0025] Second Embodiment

[0026] Please see Figure 1 , Figure 2 and Figure 3 Each support frame 1 has a retaining ring 16 fixedly connected to both sides. The two retaining rings 16 are connected and tightened by a detachable chain 9, thereby tightening the two support frames 1.

[0027] In this embodiment, the two ends of the chain 9 are respectively provided with locking hooks, which can hook the retaining ring 16. The chain 9 controls the distance between the two support frames 1 and limits the maximum and minimum range of motion of the two sealing heads 4 to adapt to the length of the pipe 6.

[0028] Furthermore, the chain 9 is divided into two sections, with turnbuckles 10 installed between the two sections of the chain 9.

[0029] In this embodiment, the turnbuckle 10 serves as a driving component. By adjusting the turnbuckle 10, the distance between the two support frames 1 can be brought closer. The turnbuckle 10 can also be replaced by a lever hoist.

[0030] Furthermore, a movable plate 14 is provided on the support frame 1, and a first threaded rod 11 is connected to the movable plate 14 by a transverse through thread. The inner end of the first threaded rod 11 is rotatably connected to the rear end of a sealing head 4, and a first handwheel 12 is provided on the outer end of the first threaded rod 11.

[0031] The rear end of the sealing head 4 is fixedly connected to a guide rod 13. The movable plate 14 has a movable groove inside. The other end of the guide rod 13 extends backward into the movable groove and slides inside it.

[0032] In this embodiment, the guide rod 13 serves as a guide to control the horizontal movement of the sealing head 4. It should be noted that a baffle 19 is fixedly connected to the rear end of the guide rod 13, and a limit ring 18 is provided in the inner cavity of the movable plate 14. When the sealing head 4 moves inward to the maximum distance, the baffle 19 is pressed against the rear end face of the limit ring 18. A first threaded hole is opened laterally on the movable plate 14, and the outer surface of the first threaded rod 11 is threadedly connected to the inner cavity of the first threaded hole. Since the inner end of the first threaded rod 11 is rotatably connected to the rear end of the sealing head 4, the sealing head 4 will move horizontally when the first threaded rod 11 rotates. The first handwheel 12 is used as a driving component to drive the first threaded rod 11 to rotate. It should be noted that since the two first threaded rods 11 do not rotate at the same time, the first handwheel 12 is marked with a scale to facilitate control of the two sealing heads 4 to move the same distance.

[0033] Furthermore, the support frame 1 has a hollow internal structure, and the movable plate 14 can move up and down along the cavity inside the support frame 1. The top of the support frame 1 is vertically threaded with a second threaded rod 2, and the top of the second threaded rod 2 is provided with a second handwheel 3.

[0034] In this embodiment, a second threaded hole is vertically provided on the support frame 1, and the outer surface of the second threaded rod 2 is threadedly connected to the inner cavity of the second threaded hole. The bottom end of the second threaded rod 2 is rotatably connected to the top of the movable plate 4. Therefore, when the second threaded rod 2 rotates, the movable plate 4 can move vertically. The second handwheel 3 acts as a driving component to control the rotation of the second threaded rod 2.

[0035] Furthermore, vertical grooves are provided on both sides of the interior of the support frame 1, and limiting plates 15 that are adapted to the interior of the grooves are provided on the front and rear sides of the movable plate 14.

[0036] In this embodiment, with Figure 1The direction shown is defined as the forward direction. In order to prevent the movable plate 14 from shifting in the forward and backward direction when the first threaded rod 11 rotates, limiting plates 15 are provided on both the front and rear sides of the movable plate to limit the forward and backward direction of the limiting plates 15. At the same time, the limiting plates 15 can also serve as a guide to guide the vertical movement of the movable plate 14 within the support frame 1.

[0037] The working principle and usage process of this utility model are as follows: After the utility model is installed, first move the device to both sides of the pipe 6 to be tested, turn the second handwheel 3 to adjust the height of the two sealing heads 4 according to the height of the pipe 6, then hook the locking hooks at both ends of the chain 9 onto the retaining rings 16 on the two support frames 1 respectively, and then tighten the chain 9 with the turnbuckle 10 to adjust the distance between the two support frames 1. Then turn the first handwheel 12 to control the first threaded rod 11 to rotate and push the sealing head 4 to block one end of the pipe 6, and set the sealing ring 5 at the annular joint position between the edge of the pipe 6 end and the sealing head 4. The same operation is performed on the other end. After both ends of the pipe 6 are sealed, water or gas is transported through the delivery pipe 7, and the pressure gauge is observed and the pipe 6 is checked for leakage. After the test is completed, the test water or gas is discharged through the output pipe 8. The pipe pressure test is then completed.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing and docking device for pipeline pressure testing, characterized in that: It includes two support frames (1), which are tightened by a detachable chain (9). Each support frame (1) is provided with a sealing head (4) that can move horizontally. The two sealing heads (4) are arranged horizontally symmetrically. The sealing head (4) is a cone shape with a smaller front and a larger rear. The outer ring surface of the sealing head (4) has a series of stepped annular docking positions with gradually increasing outer diameters from front to back. The two sealing heads (4) can move inward to seal both ends of the pipe (6) and press them together. The front end of one sealing head (4) is provided with a first through groove that extends to its rear end. The rear end of the sealing head (4) is connected to a conveying pipe (7). The front end of the other sealing head (4) is provided with a second through groove that extends to its rear end. The rear end of the sealing head (4) is connected to an output pipe (8). The front end of the second through groove is connected to a hose (17). The sealing head (4) is provided with a pressure gauge that is connected to a pressure gauge buffer pipe.

2. The sealing and docking device for pipeline pressure testing as described in claim 1, characterized in that: Each of the support frames (1) is fixedly connected to two sides with retaining rings (16), and the two retaining rings (16) are connected and tightened by the detachable chain (9) to tighten the two support frames (1).

3. The sealing and docking device for pipeline pressure testing as described in claim 2, characterized in that: The chain (9) is divided into two sections, and turnbuckles (10) are provided between the two sections of the chain (9).

4. The sealing and docking device for pipeline pressure testing as described in claim 1, characterized in that: The support frame (1) is provided with a movable plate (14), and a first threaded rod (11) is connected to the movable plate (14) by a transverse through thread. The inner end of the first threaded rod (11) is rotatably connected to the rear end of a sealing head (4), and a first handwheel (12) is provided at the outer end of the first threaded rod (11).

5. A sealing and docking device for pipeline pressure testing as described in claim 4, characterized in that: The rear end of the sealing head (4) is fixedly connected to a guide rod (13), and the interior of the movable plate (14) is provided with a movable groove. The other end of the guide rod (13) extends rearward into the movable groove and slides inside it.

6. The sealing and docking device for pipeline pressure testing as described in claim 4, characterized in that: The support frame (1) has a hollow structure inside. The movable plate (14) can move up and down along the cavity inside the support frame (1). The top of the support frame (1) is vertically threaded with a second threaded rod (2), and the top of the second threaded rod (2) is provided with a second handwheel (3).

7. A sealing and docking device for pipeline pressure testing as described in claim 6, characterized in that: The support frame (1) has vertical grooves on both sides inside, and the movable plate (14) has limiting plates (15) on the front and rear sides that are adapted to the inside of the grooves.

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