Pipeline pressure testing and plugging device

Abstract

The present invention relates to the technical field of pipeline water pressure test plugging, and specifically to a pipeline pressure test plugging device, a pipeline pressure test plugging device, comprising a base, a left plugging component and a right plugging component, the left plugging component is arranged inside the left end of the pressure test pipeline, the right plugging component is arranged inside the right end of the pressure test pipeline, the base supports the left plugging component, the right plugging component and the pressure test pipeline; the left plugging component comprises a first blind plate, a first water bag, a first control pipe and an exhaust pipe, the first blind plate is arranged inside the pressure test pipeline, the first water bag is arranged on the inner side of the first blind plate, and the first water bag is made of elastic material; the present invention can form a better full sealing effect, will not form constraints on the pressure test pipeline, and the pressure test pipeline does not have the problem of incoordination of deformation; and the pressure test pipeline only bears radial force, this force mode is closer to the force state of the buried long straight pipeline, is more in line with the actual project, and can obtain more accurate pressure test test results.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline water pressure test plugging, and in particular to a pipeline pressure test plugging device. Background Art

[0002] Pipelines used in oil transportation usually need to undergo a water pressure test to detect the pressure resistance of the pipeline. During the water pressure test, a plugging device is required to seal both ends of the pipeline, and then water is injected into the pipeline for a water pressure test. Currently, the commonly used plugging device is a flange joint with a blind plate for plugging; the flange joint is sleeved on the outside of the pipeline end face, and the flange joint and the blind plate are usually fixed by welding or threaded connection. If the blind plate is fixed by welding, the plugging device needs to be disassembled by cutting in a destructive manner after the water pressure test, which is complicated to operate and costly, and the reuse rate of the plugging device is low; if the blind plate is fixed by threaded connection, the sealing performance is insufficient, and due to the constraint of the end blind plate, the pipeline deformation is not coordinated, making it difficult to conduct a blasting experiment. In addition, in the existing plugging device, the way to discharge the air in the pipeline is to open an upward exhaust pipe on the blind plate; due to structural limitations, the exhaust pipe interface cannot be set at the highest position of the inner wall of the pipeline, so the exhaust requires the auxiliary pipeline to be tilted, which makes it difficult to test the pressure of large-diameter pipelines.

[0003] Chinese patent CN203743715U discloses a plastic water supply pipe plugging and pressure testing device, including a fastening tenon fixedly mounted on the pressure testing pipe fitting, a force-added flange mounted on the pressure testing pipe fitting and located on the side of the fastening tenon away from the end of the pressure testing pipe fitting, and a pipe end plugging device for plugging the end of the pressure testing pipe fitting, wherein the pipe end plugging device includes a force-bearing blind plate, a pipe end plugging structure for plugging the pressure testing pipe fitting is provided on the force-bearing blind plate, and a force-added bolt for pressing and fixing the pipe end plugging structure to the end of the pressure testing pipe fitting is provided between the force-bearing blind plate and the force-added flange. By setting a fastening tenon fixedly mounted on the pressure testing pipe fitting, the force-added bolt can be used to tighten and fix the force-added flange and the force-blind plate, and provide pressure for the pipe end plugging structure to plug the end of the pressure testing pipe fitting, thereby finally achieving the plugging of the end of the pressure testing pipe fitting; by using the plastic water supply pipe plugging and pressure testing device of the utility model, after the pipeline pressure test is completed, it is only necessary to remove the various mechanical components, without causing material waste. During the test of the device, the sealing pressure comes from the friction between the fastening tenon and the outer wall of the pipe, causing wear on the outer wall of the pipe.

[0004] Chinese patent CN213394122U discloses a pipeline water pressure test plugging device, including a blind plate, a pressure test pipeline is arranged on the left side of the blind plate, a high valve is arranged on the upper end of the right side of the blind plate, a low valve is arranged on the lower end of the right side of the blind plate, a recovery pipeline is arranged on the right end of the low valve, a high discharge channel is arranged on the upper end of the blind plate, a low discharge channel is arranged on the lower end of the blind plate, a pipe wall is arranged inside the pressure test pipeline, a first thread is arranged inside the low discharge channel, a second thread is arranged inside the high discharge channel, a sealing ring is arranged between the pressure test pipeline and the blind plate, and a flange bolt is arranged inside the sealing ring. The utility model can discharge the gas above the pressure test pipeline in the experiment by setting a high valve, so as to avoid the gas in the pipeline affecting the system pressure stabilization during the pressure test; and can discharge the pressure test medium in the pressure test pipeline after the test by setting a low valve, so as to prevent waste of resources. The sealing of the plugging device relies on the threaded connection between the blind plate and the pipeline, and it is necessary to open a threaded hole on the end face of the pipeline. This method is not suitable for situations with strict requirements on the pipeline.

[0005] Therefore, there is an urgent need to design a pipeline pressure test plugging device that does not require destroying the pipeline and can provide higher sealing performance. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a pipeline pressure test plugging device, in which the plugging part is built into the pipeline and does not need to rely on the pipeline and provide the axial force required for sealing.

[0007] To achieve the above object, the technical solution of the present invention is as follows:

[0008] A pipeline pressure test plugging device comprises a base, a left plugging assembly and a right plugging assembly, wherein the left plugging assembly is arranged inside the left end of the pressure test pipeline, the right plugging assembly is arranged inside the right end of the pressure test pipeline, and the base supports the left plugging assembly, the right plugging assembly and the pressure test pipeline;

[0009] The left plugging assembly includes a first blind plate, a first water bag, a first control pipe and an exhaust pipe, wherein the first blind plate is arranged inside the pressure test pipe, the first water bag is arranged inside the first blind plate, and the first water bag is made of elastic material; a first annular hollow area is arranged inside the first water bag, a first through hole is arranged at the center of the first water bag, a first water injection hole is arranged on one side of the first through hole of the first water bag, and the first water injection hole is connected to the first annular hollow area; the first control pipe is arranged outside the first blind plate, the first control pipe is connected to the first water injection hole, and the exhaust pipe is passed through the first through hole;

[0010] The right blocking assembly includes a second blind plate, a second water bag, a second control pipe and a water injection pipe. The second blind plate is arranged inside the pressure test pipe. The second water bag is arranged inside the second blind plate, and the second water bag is made of elastic material. A second annular hollow area is arranged inside the second water bag, a second through hole is arranged at the center of the second water bag, and a second water injection hole is arranged on one side of the second through hole of the second water bag, and the second water injection hole is connected to the second annular hollow area. The second control pipe is arranged outside the second blind plate, the second control pipe is connected to the second water injection hole, and the water injection pipe is passed through the second through hole.

[0011] Furthermore, the first water bag includes a first flange, a first neck and a first water bag area, the first water bag area is arranged on the inner side of the first blind plate, and the first annular hollow area is arranged inside the first water bag area; a first fixing hole corresponding to the first neck is arranged on the first blind plate, and the first neck is fixed in the first fixing hole; the first flange is arranged on the outer side of the first blind plate, and the outer diameter of the first flange is larger than the outer diameter of the first neck.

[0012] Furthermore, a first pressing plate is arranged on the outer side of the first flange, and the first pressing plate is connected to the first blind plate by bolts.

[0013] Furthermore, the second water bag includes a second flange, a second neck and a second water bag area, the second water bag area is arranged on the inner side of the second blind plate, and the second annular hollow area is arranged inside the second water bag area; a second fixing hole corresponding to the second neck is arranged on the second blind plate, and the second neck is fixed in the second fixing hole; the second flange is arranged on the outer side of the second blind plate, and the outer diameter of the second flange is larger than the outer diameter of the second neck.

[0014] Furthermore, a second pressing plate is arranged on the outer side of the second flange, and the second pressing plate is connected to the second blind plate by bolts.

[0015] Furthermore, the first blind plate is a disc-shaped structure, and the single-sided gap between the outer wall of the first blind plate and the inner wall of the pressure test pipe is 0.5-1.5mm; the second blind plate is a disc-shaped structure, and the single-sided gap between the outer wall of the second blind plate and the inner wall of the pressure test pipe is 0.5-1.5mm.

[0016] Furthermore, the first water bag is made of rubber material, and the second water bag is made of rubber material.

[0017] Furthermore, the portion of the exhaust pipe after entering the first water bag is bent upward into an arc shape.

[0018] Furthermore, the base includes a bottom plate, and a plurality of first support columns are arranged above the middle of the bottom plate, and the first support columns are used to support the pressure test pipeline; second support columns are arranged above both sides of the bottom plate, and the second support columns are used to support the left plugging assembly and the right plugging assembly.

[0019] Furthermore, a reinforcement column inclined at a certain angle is arranged on the outer side of the second support column.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention arranges blind plates at both ends of the pressure test pipe, arranges water bags inside the blind plates, and arranges a gap between the blind plates and the inner wall of the pressure test pipe. On the premise of ensuring that the sealing component is not skewed, the blind plates do not contact the pressure test pipe, thereby avoiding friction of the inner wall of the pressure test pipe. During the pressure test, the water bags are filled with water to expand, and the expanded water bags are in sealing contact with the pressure test pipe. Since the water bags are made of elastic material, a good full sealing effect can be formed between the water bags and the pressure test pipe. Moreover, since there is a certain gap between the blind plates and the pressure test pipe, the sealing component will not constrain the pressure test pipe, and the pressure test pipe will not have the problem of incoordination in deformation.

[0022] 2. The present invention arranges an exhaust pipe in the water bag, and the exhaust pipe is bent upward into an arc shape after passing into the pressure test pipe. After the pressure test pipe is filled with water, the air in the pressure test pipe can be discharged from the exhaust pipe, thereby avoiding the influence of the air in the pressure test pipe on the pressure test.

[0023] 3. In the present invention, a base is provided, and second support columns are provided at both ends of the base. The second support columns support the left plugging assembly and the right plugging assembly. During the pressure test, the left plugging assembly and the right plugging assembly are respectively subjected to outward axial forces. The second support columns are used to offset the axial force, and the pressure test pipeline only bears radial force. This force bearing mode is closer to the stress state of the buried long straight pipeline, is more consistent with the actual project, and can obtain more accurate pressure test test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention.

[0025] Description of reference numerals:

[0026] 1-first control pipe; 2-exhaust pipe; 3-first pressure plate; 4-first blind plate; 5-first water bag; 6-pressure test pipe; 7-water injection pipe; 8-base; 801-first support column; 802-second support column; 803-reinforcement column; 9-second blind plate; 10-second water bag; 11-second control pipe; 12-second pressure plate. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] like Figure 1 As shown, the present invention provides a pipeline pressure test plugging device, including a base 8, a left plugging assembly and a right plugging assembly, wherein the left plugging assembly is arranged inside the left end of the pressure test pipeline 6, and the right plugging assembly is arranged inside the right end of the pressure test pipeline 6, and the base 8 supports the left plugging assembly, the right plugging assembly and the pressure test pipeline 6;

[0029] The left plugging assembly includes a first blind plate 4, a first water bag 5, a first control pipe 1 and an exhaust pipe 2. The first blind plate 4 is arranged inside the pressure test pipe 6. The first water bag 5 is arranged inside the first blind plate 4. The first water bag 5 is made of elastic material. A first annular hollow area is arranged inside the first water bag 5. A first through hole is arranged at the center of the first water bag 5. The first water bag 5 is provided with a first water injection hole on one side of the first through hole. The water inlet end of the first water injection hole is flared. The first water injection hole is connected to the first annular hollow area. The first control pipe 1 is arranged outside the first blind plate 4. The first control pipe 1 is connected to the first water injection hole. The exhaust pipe 2 is passed through the first through hole.

[0030] The right plugging assembly includes a second blind plate 9, a second water bag 10, a second control pipe 11 and a water injection pipe 7. The second blind plate 9 is arranged inside the pressure test pipe 6. The second water bag 10 is arranged inside the second blind plate 9. The second water bag 10 is made of elastic material. A second annular hollow area is arranged inside the second water bag 10. A second through hole is arranged at the center of the second water bag 10. The second water bag 10 is provided with a second water injection hole on one side of the second through hole. The second water injection hole is connected to the second annular hollow area. The second control pipe 11 is arranged outside the second blind plate 9. The second control pipe 11 is connected to the second water injection hole. The water injection pipe 7 is passed through the second through hole.

[0031] Preferably, the first water bag 5 is an axisymmetric structure, and the first water bag 5 includes a first flange, a first neck and a first water bag area, the first water bag area is arranged on the inner side of the first blind plate 4, and the first annular hollow area is arranged inside the first water bag area; a first fixing hole corresponding to the first neck is arranged on the first blind plate 4, and the first neck is fixed in the first fixing hole; the first flange is arranged on the outer side of the first blind plate 4, and the outer diameter of the first flange is larger than the outer diameter of the first neck; the first flange is clamped on the outer side of the first blind plate 4 for fixing the first water bag 5.

[0032] Preferably, a first pressure plate 3 is arranged outside the first flange, and the first pressure plate 3 is connected to the first blind plate 4 by bolts; the bolts pass through the first pressure plate 3, the first flange and the first blind plate 4 in sequence to further fix the first water bag 5.

[0033] Preferably, the second water bag 10 is an axisymmetric structure, and the second water bag 10 includes a second flange, a second neck and a second water bag area. The second water bag area is arranged on the inner side of the second blind plate 9, and the second annular hollow area is arranged inside the second water bag area; a second fixing hole corresponding to the second neck is arranged on the second blind plate 9, and the second neck is fixed in the second fixing hole; the second flange is arranged on the outer side of the second blind plate 9, and the outer diameter of the second flange is larger than the outer diameter of the second neck.

[0034] Preferably, a second pressing plate 12 is arranged outside the second flange, and the second pressing plate 12 is connected to the second blind plate 9 by bolts, and the bolts pass through the second pressing plate 12, the second flange and the second blind plate 9 in sequence.

[0035] Preferably, the first blind plate 4 is a disc-shaped structure, and the single-sided gap between the outer wall of the first blind plate 4 and the inner wall of the pressure test pipe 6 is 0.5-1.5mm; the second blind plate 9 is a disc-shaped structure, and the single-sided gap between the outer wall of the second blind plate 9 and the inner wall of the pressure test pipe 6 is 0.5-1.5mm; since there is a certain gap between the first blind plate 4 and the second blind plate 9 and the inner wall of the pressure test pipe 6, it is relatively easy to insert the left plugging assembly and the right plugging assembly without damaging the pressure test pipe 6.

[0036] Preferably, the first water bag 5 is made of rubber material, and the second water bag 10 is made of rubber material; the first water bag 5 and the second water bag 10 can also be made of other elastic materials as long as the requirements for injection and expansion are met.

[0037] Preferably, the portion of the exhaust pipe 2 after entering the first water bag 5 is bent upward into an arc shape. When water is injected into the pressure test pipe 6, the air in the pressure test pipe 6 is located above the inside of the pressure test pipe 6, and the internal air is discharged through the exhaust pipe 2; a control valve can be set outside the exhaust pipe 2. When the pressure test pipe 6 is filled with water, the control valve is closed to prevent water from flowing out of the exhaust pipe 2.

[0038] Preferably, the base 8 includes a bottom plate, and a plurality of first support columns 801 are arranged above the middle part of the bottom plate, and the first support columns 801 are used to support the pressure test pipe 6; second support columns 802 are arranged above both sides of the bottom plate, and the upper end of the second support column 802 on the left side is connected to the first pressure plate 3, which is used to limit the axial displacement of the left plugging assembly; the upper end of the second support column 802 on the right side is connected to the second pressure plate 12, which is used to limit the axial displacement of the right plugging assembly.

[0039] Preferably, a reinforcing column 803 inclined at a certain angle is provided on the outer side of the second supporting column 802 to enhance the supporting strength of the second supporting column 802 .

[0040] The above specific implementation methods are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to examples, a person skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A pipeline pressure test plugging device, comprising a base, a left plugging assembly and a right plugging assembly, wherein the left plugging assembly is arranged inside the left end of the pressure test pipeline, and the right plugging assembly is arranged inside the right end of the pressure test pipeline, and the base supports the left plugging assembly, the right plugging assembly and the pressure test pipeline; Features: The left plugging assembly includes a first blind plate, a first water bag, a first control pipe and an exhaust pipe, wherein the first blind plate is arranged inside the pressure test pipe, the first water bag is arranged inside the first blind plate, and the first water bag is made of elastic material; a first annular hollow area is arranged inside the first water bag, a first through hole is arranged at the center of the first water bag, a first water injection hole is arranged on one side of the first through hole of the first water bag, and the first water injection hole is connected to the first annular hollow area; the first control pipe is arranged outside the first blind plate, the first control pipe is connected to the first water injection hole, and the exhaust pipe is passed through the first through hole; The right plugging assembly includes a second blind plate, a second water bag, a second control pipe and a water injection pipe, wherein the second blind plate is arranged inside the pressure test pipe, the second water bag is arranged inside the second blind plate, and the second water bag is made of elastic material; a second annular hollow area is arranged inside the second water bag, a second through hole is arranged at the center of the second water bag, a second water injection hole is arranged on one side of the second through hole of the second water bag, and the second water injection hole is connected to the second annular hollow area; the second control pipe is arranged outside the second blind plate, the second control pipe is connected to the second water injection hole, and the water injection pipe is passed through the second through hole; The base comprises a bottom plate, a plurality of first support columns are arranged above the middle of the bottom plate, and the first support columns are used to support the pressure test pipe; second support columns are arranged above both sides of the bottom plate, and the second support columns are used to support the left plugging assembly and the right plugging assembly; The first water bag comprises a first flange, a first neck and a first water bag area, the first water bag area is arranged on the inner side of the first blind plate, and the first annular hollow area is arranged inside the first water bag area; a first fixing hole corresponding to the first neck is arranged on the first blind plate, and the first neck is fixed in the first fixing hole; the first flange is arranged on the outer side of the first blind plate, and the outer diameter of the first flange is greater than the outer diameter of the first neck; The second water bag comprises a second flange, a second neck and a second water bag area, the second water bag area is arranged on the inner side of the second blind plate, and the second annular hollow area is arranged inside the second water bag area; a second fixing hole corresponding to the second neck is arranged on the second blind plate, and the second neck is fixed in the second fixing hole; the second flange is arranged on the outer side of the second blind plate, and the outer diameter of the second flange is greater than the outer diameter of the second neck; The first blind plate is a disc-shaped structure, and the single-side gap between the outer wall of the first blind plate and the inner wall of the pressure test pipe is 0.5-1.5mm; the second blind plate is a disc-shaped structure, and the single-side gap between the outer wall of the second blind plate and the inner wall of the pressure test pipe is 0.5-1.5mm.

2. The pipeline pressure testing and plugging device according to claim 1, characterized in that: A first pressing plate is arranged outside the first flange, and the first pressing plate is connected to the first blind plate through bolts.

3. The pipeline pressure testing and plugging device according to claim 1, characterized in that: A second pressing plate is arranged outside the second flange, and the second pressing plate is connected to the second blind plate through bolts.

4. The pipeline pressure testing and plugging device according to claim 1, characterized in that: The first water bag is made of rubber material, and the second water bag is made of rubber material.

5. The pipeline pressure testing and plugging device according to claim 1, characterized in that: The portion of the exhaust pipe after entering the first water bag is bent upward into an arc shape.

6. The pipeline pressure testing and plugging device according to claim 5, characterized in that: A reinforcement column inclined at a certain angle is arranged outside the second support column.

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