Pressure detection device for pressure pipeline production

Abstract

This utility model provides a pressure testing device for pressure pipeline production, relating to the field of pressure testing technology for pressure pipelines. It includes a pipeline with a coaxially distributed movable tube movably installed inside. Both ends of the movable tube are fixedly fitted with discs that fit with the inner wall of the pipeline. Sealing mechanisms are movably installed at opposite ends of the two discs. The movable tube moves within the pipeline, and the upper and side sealing plates on the discs at both ends move to fit against the inner wall of the pipeline. Water is injected near the movable tube, and the pipeline is tested by observing the water pressure and whether there is leakage on the outer wall of the pipeline. The long pipeline can be cut into several short segments for segment-by-segment testing. Regardless of the location of the leak, it will be within the current testing segment, and the pressure drop will be immediately apparent, completely solving the problems of "long distance, small pressure drop, and inability to detect."

Description

Technical Field

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

[0002] Pressure pipelines are typically used to transport high-pressure media, which may be flammable, explosive, toxic, or corrosive. Pressure testing during the production process can help detect potential defects in the pipeline, such as cracks, corrosion, and leaks.

[0003] Therefore, a pressure resistance testing mechanism for special equipment pressure pipelines, with publication number CN223078081U, includes a support component, an adjustment module, and a clamping module. The clamping module includes a screw groove containing two sliders, with each end of the inner side of the screw groove movably connected to one end of a bidirectional screw. This invention uses the adjustment module to move two sealing caps to a height flush with the pressure pipeline, and the clamping module to bring the two sealing caps together, thus clamping the pressure pipeline and forming a relatively sealed space. An external air pump is turned on, allowing external gas to enter the valve and pressure pipeline. The pressure gauge reading is observed simultaneously. When the pressure gauge reaches a certain value, the external air pump is turned off, and after a period of time, the pressure gauge reading is observed again. The current reading is compared with the previous reading to determine the pressure resistance of the pipeline.

[0004] However, for longer pressure pipelines, the distance between the sealing caps at both ends is relatively far, and it is difficult to detect leaks in the middle of the pipeline through the sealing caps at both ends because the leaks may be far from the ends, and the amount of leaked gas is insufficient to be detected by the pressure gauge in a short time. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art by proposing a pressure testing device for pressure pipeline production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a pressure testing device for pressure pipeline production, comprising a pipeline, wherein a coaxially distributed movable tube is movably installed inside the pipeline, and a disc with clearance fit to the inner wall of the pipeline is fixedly installed at both ends of the movable tube. A sealing mechanism is movably installed at one end of each of the two discs facing each other. The sealing mechanism includes two upper sealing plates and two side sealing plates symmetrically distributed about the cross-section of the pipeline and abutting against the inner wall of the pipeline. The sides of the two upper sealing plates and the two side sealing plates form a complete arc and the center of the arc coincides with the center of the pipeline. The upper sealing plates and the side sealing plates are staggered and slidably connected. The edges of the upper sealing plates and the side sealing plates are interference-fitted. A sealing plate is provided at one end of each of the two discs facing each other. The inner sides of the upper sealing plates and the side sealing plates are clearance-fitted, and the sealing plate is inserted into the gap between the upper sealing plate and the side sealing plate on the same side. A valve for connecting a water pump is installed on one of the upper sealing plates.

[0007] Preferably, a plurality of hydraulic rods are fixedly installed on the outer surface of the movable pipe near both ends, arranged in a ring array around the central axis of the pipe, and an electric roller that is rolled and connected to the inner wall of the pipe is fixedly installed on the telescopic end of the hydraulic rod.

[0008] Preferably, each of the two discs has two sliding grooves at one end facing each other. The two sliding grooves on the same disc are distributed at a 90-degree angle and are staggered. Both sliding grooves are rotatably connected to a bidirectional lead screw. A coaxially distributed bevel gear ring is fixedly installed on the surface of the bidirectional lead screw.

[0009] Preferably, one of the grooves on the same disc is arranged along the distribution direction of the two upper sealing plates and is slidably connected to the opposite sides of the two upper sealing plates, and the opposite sides of the two upper sealing plates are respectively threaded to the two ends of the bidirectional lead screw in the groove.

[0010] Preferably, another chute is provided along the distribution direction of the two side sealing plates and is slidably connected to the opposite sides of the two side sealing plates, and the opposite sides of the two side sealing plates are respectively threaded to the two ends of the bidirectional lead screw in the chute.

[0011] Preferably, two dual-axis motors are fixedly installed at the center of the inner wall of the moving tube. The two output shafts of the dual-axis motors are respectively oriented towards the two ends of the moving tube and rotatably connected through the surface of the disc. Two bevel gears are rotatably connected inside the disc. The two bevel gears are respectively meshed with two bevel gear rings inside the same disc and are respectively fixedly installed on the main shafts of the two dual-axis motors.

[0012] Preferably, coaxially distributed electric push rods are fixedly installed at the center of both ends of the moving tube, and the telescopic end of the electric push rod is fixedly installed with a plug that penetrates the surface of the disc and is connected to the surface of the adjacent sealing plate.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, a movable pipe is installed inside the pipeline. The movable pipe moves within the pipeline, and the upper sealing plate and side sealing plate on the discs at both ends of the movable pipe move to fit against the inner wall of the pipeline. By injecting water near the movable pipe, the pipeline is detected by observing the water pressure and whether there is any leakage on the outer wall of the pipeline. The long pipeline is cut into several short sections for inspection. No matter where the leak point is located, it is within the current inspection section, and the pressure drop is immediately apparent, thus completely solving the problems of "long distance, small pressure drop, and inability to detect".

[0014] 2. In this utility model, by setting a sealing plate, the gap between the upper sealing plate and the side sealing plate can be sealed, and by using the extension of the electric push rod, the plug can be used to drive the sealing plate away from the disc and disengage from the gap between the upper sealing plate and the side sealing plate, without hindering the movement of the upper sealing plate and the side sealing plate. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a pressure detection device for pressure pipeline production; Figure 2 This utility model provides a structural schematic diagram of the moving pipe of a pressure detection device for pressure pipeline production; Figure 3 This utility model proposes a pressure testing device for pressure pipeline production. Figure 2 A schematic diagram of the cross-sectional structure; Figure 4 This is a schematic diagram of the cross-sectional structure of the disk; Figure 5 This is a schematic diagram showing the distribution structure of the top sealing plate and the side sealing plate; Figure 6 for Figure 3 Enlarged view of point A in the middle.

[0016] Legend: 1. Pipe; 2. Moving pipe; 3. Hydraulic rod; 4. Electric roller; 5. Sealing plate; 6. Top sealing plate; 7. Side sealing plate; 8. Valve; 9. Disc; 10. Dual-axis motor; 11. Electric push rod; 12. Two-way lead screw; 13. Bevel gear ring; 14. Bevel gear; 15. Slide groove; 16. Insert. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] like Figures 1-6 As shown, a pressure detection device for pressure pipeline production includes a pipeline 1. A movable tube 2 is movably installed coaxially inside the pipeline 1. Both ends of the movable tube 2 are fixedly installed with discs 9 that fit with the inner wall of the pipeline 1 with clearance. Several hydraulic rods 3 are fixedly installed on the outer surface of the movable tube 2 near both ends, arranged in a ring array around the central axis of the pipeline 1. The telescopic ends of the hydraulic rods 3 are fixedly installed with electric rollers 4 that are rolled and connected to the inner wall of the pipeline 1. In actual use, the electric rollers 4 are used to roll along the inner wall of the pipeline 1, which enables the movable tube 2 to move inside the pipeline 1, making it convenient to detect the inner wall of the pipeline 1 in sections and to find the leak point. Two discs 9 are each movably mounted with a sealing mechanism at one end facing each other. The sealing mechanism includes two upper sealing plates 6 and two side sealing plates 7, symmetrically distributed about the cross-section of the pipe 1 and contacting the inner wall of the pipe 1. The sides of the two upper sealing plates 6 and the two side sealing plates 7 form a complete arc, with the center of the arc coinciding with the center of the pipe 1. The upper sealing plates 6 and side sealing plates 7 are staggered and slidably connected, with an interference fit at their edges. Each disc 9 has a sealing plate 5 at one end facing each other. The inner sides of the upper sealing plates 6 and side sealing plates 7 are clearance-fitted, and the sealing plate 5 is inserted into the gap between the upper sealing plates 6 and side sealing plates 7 on the same side. Figure 2 As shown, two upper sealing plates 6 and their arc-shaped outer edges are used to fit against the inner wall of the pipe 1, and the sealing of the fitting edges is ensured by installing sealing gaskets. Furthermore, the sliding contact surfaces between the upper sealing plates 6 and the side sealing plates 7 are also sealed by installing sealing gaskets. Figure 2 and Figure 5 As shown, the gap between the upper sealing plate 6 and the side sealing plate 7 is filled by the sealing plate 5, and the seal is ensured by setting a sealing gasket on the surface of the sealing plate 5. A valve 8 for connecting a water pump is installed on one of the upper sealing plates 6. After the two ends of the moving pipe 2 are sealed by the action of the upper sealing plate 6 and the side sealing plate 7, water is injected into the space between the two discs 9 by the water pump through the open valve 8. The water pressure is used to test the pressure resistance of the pipe 1, and the presence of leaks can be observed on the outer wall of the pipe 1 to help personnel determine the leak point of the pipe 1. In addition, when performing water injection pressure testing, a water pressure sensor can be installed inside one of the discs 9 to monitor water pressure changes.

[0020] Two sliding grooves 15 are opened at opposite ends of two discs 9. The two sliding grooves 15 on the same disc 9 are distributed at a 90-degree angle and are staggered. A bidirectional lead screw 12 is rotatably connected in both sliding grooves 15. A coaxially distributed bevel gear ring 13 is fixedly installed on the surface of the bidirectional lead screw 12. Two dual-axis motors 10 are fixedly installed at the center of the inner wall of the moving tube 2. The two output shafts of the dual-axis motors 10 are respectively facing the two ends of the moving tube 2 and are rotatably connected through the surface of the disc 9. Two bevel gears 14 are rotatably connected in the disc 9. The two bevel gears 14 are respectively meshed with the two bevel gear rings 13 in the same disc 9 and are respectively fixedly installed on the main shafts of the two dual-axis motors 10. In actual use, the bevel gears 14 at both ends of one dual-axis motor 10 rotate, and the corresponding bevel gear ring 13 rotates under the action of meshing connection, so that the bidirectional lead screw 12 in the vertical direction in the two discs 9 can be rotated. Similarly, the other dual-axis motor 10 can be started to make the horizontal bidirectional lead screw 12 in the two discs 9 rotate at the same speed.

[0021] One of the slide grooves 15 on the same disc 9 is arranged along the distribution direction of the two upper sealing plates 6 and is slidably connected to the opposite sides of the two upper sealing plates 6. The opposite sides of the two upper sealing plates 6 are respectively threaded to both ends of the bidirectional lead screw 12 in the slide groove 15, which facilitates the two upper sealing plates 6 on the two discs 9 to move at the same speed and to move relative to or towards each other. The other slide groove 15 is arranged along the distribution direction of the two side sealing plates 7 and is slidably connected to the opposite sides of the two side sealing plates 7. The opposite sides of the two side sealing plates 7 are respectively threaded to both ends of the bidirectional lead screw 12 in the slide groove 15, which facilitates the two side sealing plates 7 on the two discs 9 to move at the same speed and to move relative to or towards each other under the driving action of another dual-axis motor 10. Therefore, it is convenient to realize that the upper sealing plates 6 and side sealing plates 7 on the disc 9 move sequentially to contact or detach from the inner wall of the pipe 1.

[0022] Electric push rods 11 are fixedly installed at the center of both ends of the moving tube 2. The telescopic end of the electric push rod 11 is fixedly installed with a plug 16 that penetrates the surface of the disc 9 and is connected to the surface of the adjacent sealing plate 5. During the movement of the upper sealing plate 6 and the side sealing plate 7, the extension of the electric push rod 11 enables the plug 16 to drive the sealing plate 5 away from the disc 9 and disengage from the gap between the upper sealing plate 6 and the side sealing plate 7, so as not to hinder the movement of the upper sealing plate 6 and the side sealing plate 7.

[0023] The method of using this utility model is as follows; 1. Positioning: Move the entire device to the side of the pipe to be tested 1 using the electric roller 4, so that the moving pipe 2 is coaxial with the pipe 1.

[0024] 2. Sealing: The dual-axis motor 10 drives the bidirectional lead screw 12 to rotate, so that the upper sealing plate 6 and the side sealing plate 7 move towards each other and fit against the inner wall of the pipe 1. The electric push rod 11 retracts to fill and seal the gap between the upper sealing plate 6 and the side sealing plate 7, thereby temporarily sealing both ends of the pipe section.

[0025] 3. Pressurization: The water pump fills the pipe section 1 with water through valve 8 and maintains pressure. Pipe 1 is tested by observing whether there is any leakage outside the pipe.

[0026] 4. Unsealing: Valve 8 is opened and water is pumped out. After the water is pumped out, sealing plate 5 moves away from upper sealing plate 6. Then upper sealing plate 6 and side sealing plate 7 move away from the inner wall of pipe 1 one after the other.

[0027] Segmented forward movement: The electric roller 4 drive device moves the entire section to the next section to be tested, and steps 2-4 are repeated until the entire long pipe 1 is tested.

[0028] The wiring diagrams for the water pump, hydraulic rod 3, electric roller 4, dual-axis motor 10, electric push rod 11, and valve 8 in this utility model are common knowledge in the field, and their working principles are known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring arrangements for the water pump, hydraulic rod 3, electric roller 4, dual-axis motor 10, electric push rod 11, and valve 8 will not be explained in detail.

[0029] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present 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 for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A pressure testing device for pressure pipeline production, comprising a pipeline (1), characterized in that: The pipe (1) is movably installed with a coaxially distributed movable pipe (2). Both ends of the movable pipe (2) are fixedly installed with a disc (9) that fits with the inner wall of the pipe (1) with a clearance. Both discs (9) are movably installed with a sealing mechanism at one end facing each other. The sealing mechanism includes two upper sealing plates (6) and side sealing plates (7) that are symmetrically distributed about the cross-section of the pipe (1) and abut against the inner wall of the pipe (1). The sides of the two upper sealing plates (6) and the two side sealing plates (7) form a complete arc and the arc The center coincides with the center of the pipe (1). The upper sealing plate (6) and the side sealing plate (7) are staggered and slidably connected. The upper sealing plate (6) and the side sealing plate (7) are interference-fitted at their edges. Both of the two discs (9) are provided with sealing plates (5) facing each other. The inner sides of the upper sealing plate (6) and the side sealing plate (7) are fitted with a gap, and the sealing plate (5) is inserted into the gap between the upper sealing plate (6) and the side sealing plate (7) on the same side. A valve (8) for connecting a water pump is installed on one of the upper sealing plates (6).

2. The pressure detection device for pressure pipeline production according to claim 1, characterized in that: Several hydraulic rods (3) are fixedly installed on the outer surface of the moving tube (2) near both ends, arranged in a ring array around the central axis of the pipe (1). The telescopic ends of the hydraulic rods (3) are fixedly installed with electric rollers (4) that are rolled and connected to the inner wall of the pipe (1).

3. The pressure detection device for pressure pipeline production according to claim 1, characterized in that: Two grooves (15) are opened at opposite ends of the two discs (9). The two grooves (15) on the same disc (9) are distributed at a 90-degree angle and are staggered. Both grooves (15) are rotatably connected to a two-way lead screw (12). A coaxially distributed bevel ring (13) is fixedly installed on the surface of the two-way lead screw (12).

4. The pressure detection device for pressure pipeline production according to claim 3, characterized in that: One of the grooves (15) on the same disc (9) is arranged along the distribution direction of the two upper sealing plates (6) and is slidably connected to the opposite sides of the two upper sealing plates (6). The opposite sides of the two upper sealing plates (6) are respectively threaded to the two ends of the bidirectional screw (12) in the groove (15).

5. The pressure testing device for pressure pipeline production according to claim 3, characterized in that: Another chute (15) is arranged along the distribution direction of the two side sealing plates (7) and is slidably connected to the opposite sides of the two side sealing plates (7). The opposite sides of the two side sealing plates (7) are respectively threaded to the two ends of the bidirectional screw (12) in the chute (15).

6. The pressure detection device for pressure pipeline production according to claim 3, characterized in that: Two dual-axis motors (10) are fixedly installed at the center of the inner wall of the moving tube (2). The two output shafts of the dual-axis motors (10) are respectively facing the two ends of the moving tube (2) and are rotatably connected through the surface of the disc (9). Two bevel gears (14) are rotatably connected inside the disc (9). The two bevel gears (14) are respectively meshed with two bevel gear rings (13) inside the same disc (9) and are respectively fixedly installed on the main shafts of the two dual-axis motors (10).

7. The pressure testing device for pressure pipeline production according to claim 1, characterized in that: The moving tube (2) has two coaxially distributed electric push rods (11) fixedly installed at the center of each end. The telescopic end of the electric push rod (11) is fixedly installed with a plug (16) that penetrates the surface of the disc (9) and is connected to the surface of the adjacent sealing plate (5).

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