Mould pressing pipeline flange welding pressure test tool

Abstract

The utility model discloses a mould pressing pipeline flange welding pressure test tool, which belongs to the technical field of pipeline detection tools, and comprises a semicircular cover, an air inlet valve, a barometer, a two-way screw rod, a supporting piece and an inner supporting piece, the end face of the semicircular cover abuts against the surface of a flange body, and the barometer and the air inlet valve are both installed on the semicircular cover; the end face of the semicircular cover is pressed on the end face of the flange body, the supporting piece and the inner supporting piece which are connected to the two-way lead screw in a threaded mode abut against the inner wall of the pipeline body, the two-way lead screw is rotated to act on the supporting piece and the inner supporting piece to be close to each other, the inner supporting piece internally supports the supporting piece to deform, and the supporting piece firmly abuts against the inner wall of the pipeline body. A local sealing cavity is formed in the pipeline, air is continuously inflated into the semicircular cover from the air inlet valve, and the change of the barometer is observed after a period of time, so that flange pressure testing can be quickly and conveniently carried out on the pipeline body welded with the flange body in use, and the pipeline gas pressure testing device meets the use requirement of portability.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline detection tooling, in particular to a molded pipeline flange welding pressure test tooling. Background Art

[0002] During the construction of new or expanded projects such as oil refining and coal chemical industry, after the pipeline is installed, medium, high pressure (10MPa≦P﹤100.0MPa) and ultra-high pressure pipelines must be pressure tested before use. That is, the pressure test pipelines are divided into different pressure test packages according to the medium, material, pipe diameter, etc., and each pressure test package is pressure tested separately. During the pressure test, the ends of the pressure test pipelines need to be closed.

[0003] Chinese patent (CN202322193599.2) discloses a pipeline gas pressure test device. In view of the problem that when the pressure test pipeline is pressure tested, it needs to be welded to one end of the pressure test short tube, and the disassembly and installation are very cumbersome, time-consuming and labor-intensive. It can only be pressure tested on pipelines of one size, has a small scope of application, and is inconvenient to use, the following solution is proposed, which includes a bottom plate, a pad is fixedly connected to the top of the bottom plate, a third fixed plate is fixedly connected to the top of the pad, a third sliding plate is slidably connected to one side of the third fixed plate, and the pressure test short tube is fixedly connected to one side of the third sliding plate.

[0004] At present, the existing pipeline gas pressure test device has a relatively bulky structure and is used to test the pressure of finished pipes after pipeline welding. However, some pipelines in use also need to be pressure tested after the flange is replaced, making the pipeline gas pressure test device unable to meet the requirements of light use. Utility Model Content

[0005] The utility model aims to solve the above-mentioned problems and provides a die-pressed pipeline flange welding pressure test tool.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a molded pipe flange welding pressure test tool, which includes a semi-circular cover, an air intake valve, a pressure gauge, a bidirectional screw, a support member and an inner support member, the end face of the semi-circular cover is against the surface of the flange body, the pressure gauge and the air intake valve are both installed on the semi-circular cover, and the pressure gauge and the air intake valve are both connected to the interior of the semi-circular cover, the support member and the inner support member are both against the inner wall of the pipe body, the inner support member is inserted into the support member, the bidirectional screw is connected to the semi-circular cover, and the positive and negative threads on the bidirectional screw are respectively screwed to the support member and the inner support member.

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

[0008] A sealing gasket is arranged between the end surface of the semicircular cover and the flange body.

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

[0010] A conical groove is provided in the support member, and a conical boss is provided on the inner support member. The conical boss is inserted into the conical groove, and the conical boss abuts against the inner wall of the conical groove.

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

[0012] A sealing ring is arranged in the pipeline body, the sealing ring is clamped between the support member and the inner support member, and the sealing ring abuts against the inner wall of the pipeline body.

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

[0014] The bidirectional screw rod is installed on the semicircular cover through a sealed bearing seat.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] In the utility model, the end face of the semicircular cover is pressed on the end face of the flange body, and the support member and the inner support member screwed on the bidirectional screw rod both press against the inner wall of the pipe body. The bidirectional screw rod is rotated to make the support member and the inner support member approach each other, and the inner support member is deformed. The support member firmly presses against the inner wall of the pipe body, so that a local sealed cavity is formed inside the pipe. The semicircular cover is continuously inflated from the air inlet valve, and the air pressure value of the pressure gauge is observed. When the inflation reaches a certain air pressure value, the inflation is stopped, and the changes in the pressure gauge are observed after a period of time. Therefore, the flange pressure test can be quickly and conveniently performed on the pipe body in use with the flange body welded thereon, so that the pipeline gas pressure test device meets the requirements of light use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the overall structure of a molded pipe flange welding pressure test tool.

[0018] Figure 2 A cross-sectional view of a molded pipe flange welding pressure test fixture.

[0019] Figure 3 This is an exploded view of a molded pipe flange welding pressure test tool.

[0020] Legend:

[0021] 1. Semicircular cover; 2. Inlet valve; 3. Air pressure gauge; 4. Bidirectional screw; 5. Support; 6. Inner support; 7. Flange body; 8. Pipe body; 9. Sealing gasket; 11. Conical groove; 12. Conical boss; 13. Sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a technical solution: a molded pipe flange welding pressure test tool, comprising a semicircular cover 1, an air intake valve 2, a pressure gauge 3, a bidirectional screw rod 4, a support member 5 and an inner support member 6, the end face of the semicircular cover 1 is against the surface of a flange body 7, the pressure gauge 3 and the air intake valve 2 are both installed on the semicircular cover 1, and the pressure gauge 3 and the air intake valve 2 are both connected to the interior of the semicircular cover 1, the support member 5 and the inner support member 6 are both against the inner wall of the pipe body 8, the inner support member 6 is inserted into the support member 5, the bidirectional screw rod 4 is connected to the semicircular cover 1, and the positive and negative threads on the bidirectional screw rod 4 are respectively screwed to the support member 5 and the inner support member 6;

[0024] A sealing gasket 9 is provided between the end surface of the semicircular cover 1 and the flange body 7 to ensure the sealing of the space covered by the semicircular cover 1;

[0025] A conical groove 11 is provided in the support member 5, and a conical boss 12 is provided on the inner support member 6. The conical boss 12 is inserted into the conical groove 11, and the conical boss 12 abuts against the inner wall of the conical groove 11, so that when the inner support member 6 is close to the support member 5, the inner support member 6 acts on the support member 5 to elastically deform, so that the support member 5 squeezes the inner wall of the pipe body 8 more firmly, thereby ensuring the sealing inside the pipe;

[0026] A sealing ring 13 is provided in the pipe body 8, and the sealing ring 13 is sandwiched between the support member 5 and the inner support member 6, and the sealing ring 13 abuts against the inner wall of the pipe body 8. When the support member 5 and the inner support member 6 are close to each other, the sealing ring 13 is squeezed and deformed, and after the deformation, the sealing ring 13 firmly abuts against the inner wall of the pipe body 8, thereby ensuring the sealing inside the pipe;

[0027] The bidirectional screw rod 4 is installed on the semicircular cover 1 through a sealed bearing seat, and the sealing inside the semicircular cover 1 is ensured under the premise that the bidirectional screw rod 4 can rotate flexibly.

[0028] Working principle: First, cut the flange body 7 of the used pipe body 8, weld the new flange body 7 to the pipe body 8, clean the inner wall of the pipe body 8, screw the support 5 and the inner support 6 to the positive and negative threads of the two-way screw 4, respectively, so that the conical boss 12 extends into the conical groove 11, and the sealing ring 13 is clamped between the support 5 and the inner support 6. Secondly, partially send the support 5 and the inner support 6 into the pipe body 8, the support 5, the inner support 6 and the sealing ring 13 are initially against the inner wall of the pipe body 8, and the sealing gasket 9 is attached to the end face of the semicircular cover 1, so that the sealing gasket 9 is against the end face of the flange body 7. Then, under the support of the sealing bearing seat, rotate The bidirectional screw 4, the inner support member 6 and the support member 5 are close to each other, and the conical boss 12 slides along the conical groove 11. The inner support member 6 acts on the support member 5 to elastically deform, so that the support member 5 squeezes the inner wall of the pipeline body 8 more firmly. At this time, the sealing ring 13 is squeezed and deformed. After the sealing ring 13 is deformed, it firmly presses against the inner wall of the pipeline body 8 to ensure the sealing inside the pipeline. Finally, the semicircular cover 1 is continuously inflated from the air inlet valve 2, and the air pressure value of the barometer 3 is observed. When the inflation reaches a certain air pressure value, the inflation is stopped, and the changes in the barometer 3 are observed after a period of time. Then, the flange pressure test can be quickly and conveniently performed on the pipeline body 8 in use with the flange body 7 welded on it, so that the pipeline gas pressure test device meets the requirements of light use.

[0029] 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 within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A molded pipe flange welding pressure test tool, characterized in that: The invention comprises a semicircular cover (1), an air intake valve (2), a barometer (3), a bidirectional screw rod (4), a support member (5) and an inner support member (6); the end face of the semicircular cover (1) abuts against the surface of a flange body (7); the barometer (3) and the air intake valve (2) are both mounted on the semicircular cover (1), and the barometer (3) and the air intake valve (2) are both connected to the interior of the semicircular cover (1); the support member (5) and the inner support member (6) abut against the inner wall of a pipeline body (8); the inner support member (6) is inserted into the support member (5); the bidirectional screw rod (4) is connected to the semicircular cover (1), and the positive and negative threads on the bidirectional screw rod (4) are respectively screwed to the support member (5) and the inner support member (6).

2. A molded pipe flange welding pressure test tool according to claim 1, characterized in that: A sealing gasket (9) is provided between the end surface of the semicircular cover (1) and the flange body (7).

3. The molded pipe flange welding pressure test tool according to claim 1, characterized in that: The support member (5) is provided with a conical groove (11), and the inner support member (6) is provided with a conical boss (12). The conical boss (12) is inserted into the conical groove (11), and the conical boss (12) abuts against the inner wall of the conical groove (11).

4. The molded pipe flange welding pressure test tool according to claim 1, characterized in that: A sealing ring (13) is arranged inside the pipe body (8), the sealing ring (13) is clamped between the support member (5) and the inner support member (6), and the sealing ring (13) abuts against the inner wall of the pipe body (8).

5. The molded pipe flange welding pressure test tool according to claim 1, characterized in that: The bidirectional screw rod (4) is mounted on the semicircular cover (1) via a sealed bearing seat.

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