Natural gas pipeline airtightness testing device

Abstract

The utility model relates to the technical field of pipeline detection, in particular to a natural gas pipeline airtightness testing device which comprises a base and a supporting plate, a height adjusting mechanism is connected between the base and the supporting plate, the supporting plate is provided with a first half ring, and the first half ring is detachably connected with a second half ring. The base and the supporting plate are arranged, the first semi-ring on the supporting plate is driven by the height adjusting mechanism to be clamped with the natural gas pipeline, the second semi-ring can be installed by means of the fixed first semi-ring, consumption of personnel in the installation process is reduced, meanwhile, the testing device is prevented from falling off from the pipeline, and the testing efficiency is improved. And the safety guarantee of operators is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline detection, in particular to a gas pipeline air tightness testing device. Background Art

[0002] Natural gas pipelines are used to transport natural gas from production sites to consumption sites, including household, industrial and commercial uses. Pipelines are usually welded from several sections, and there is a risk of leakage between sections during use, so it is necessary to conduct air tightness testing on the joints between pipeline sections.

[0003] Chinese patent CN202223466276.8 discloses a gas pipeline weld gas tightness detection device. When in use, the sealing ring is put on the pipeline weld, and the inside of the sealing ring is pressurized. The position of the first piston rod is observed to determine whether there is a gas leak in the pipeline. The above-mentioned device has problems during use: there is no support device under the sealing ring, and multiple people are required to support the sealing ring to install it on the pipeline, which is manpower-consuming and inconvenient to operate. There is also a risk of the sealing ring falling during the installation process, which increases the risk of operation. Utility Model Content

[0004] The invention purpose of the utility model is to provide a natural gas pipeline air tightness detection device to solve the problem that the pipeline air tightness detection device needs the support of multiple persons to be installed, which is labor-consuming and inconvenient to operate and is prone to falling.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A natural gas pipeline air tightness testing device comprises a base and a support plate, wherein a height adjustment mechanism is connected between the base and the support plate, a first half ring is arranged on the support plate, and a second half ring is detachably connected to the first half ring.

[0007] The utility model discloses a gas tightness testing device for a natural gas pipeline. When in use, the base is placed under the natural gas pipeline and located at the pipeline weld, and then the first half ring is installed on a support plate, and the support plate and the first half ring are driven to move upward by a height adjustment mechanism, so that the first half ring is clamped on the bottom of the natural gas pipeline, and then the second half ring is clamped on the top of the natural gas pipeline, and finally the first half ring is connected to the second half ring, thereby realizing the installation of the testing device on the natural gas pipeline.

[0008] As a preferred solution of the utility model, the height adjustment mechanism is a push-type jack. The push-type jack has good load-bearing capacity, and the lifting and lowering of the support plate is achieved by pressing, and the support plate and the first half ring on the support plate do not need to be rotated during the process, which is more convenient to operate.

[0009] As a preferred solution of the utility model, the support plate is provided with two clamping plates, the first half ring is arranged between the two clamping plates, and the two clamping plates are respectively in contact with the two end walls of the first half ring. By arranging two clamping plates on the support plate, placing the first half ring between the two clamping plates, and positioning the first half ring by the two clamping plates, manual support by personnel can be reduced, making the detection operation more convenient.

[0010] As a preferred solution of the utility model, the top of the clamping plate is provided with an arc-shaped slot adapted to the natural gas pipeline. The arc-shaped slot on the top of the clamping plate can be clamped on the wall of the natural gas pipeline, which can increase the limiting height of the clamping plate on the first half ring, thereby improving the stability of the first half ring during use.

[0011] As a preferred solution of the utility model, two pads are provided between the two clamping plates, and the two pads are respectively in contact with the two sides of the first half ring. When the height adjustment mechanism adjusts the height of the support plate and the first half ring, the first half ring has not yet contacted the pipe wall and is prone to rolling between the two clamping plates. By respectively providing pads at the front and rear ends of the rolling direction of the first half ring, the rolling of the first half ring can be restricted.

[0012] As a preferred solution of the utility model, the side of the cushion block close to the first half ring is configured as an arc surface, thereby increasing the contact area between the cushion block and the first half ring and making the cushion block support the first half ring more stable.

[0013] As a preferred solution of the utility model, plug plates are connected to both sides of the first half ring, mounting plates are connected to both sides of the second half ring, and the plug plates and mounting plates are connected by threaded rods. The threaded rods pass through the plug plates and are connected to the mounting plates on the sides of the second half ring, and the plug plates are tightened to the bottom of the mounting plates, thereby realizing a detachable connection between the first half ring and the second half ring.

[0014] As a preferred solution of the utility model, a plug block is provided at the bottom of the mounting plate, a through slot adapted to the plug block is provided on the plug plate, and the threaded rod is connected to the plug block. During installation, the plug block at the bottom of the mounting plate can be first inserted into the through slot on the plug plate, and then the two can be tightened and locked by the threaded rod, so that the plug block can play a role of pre-positioning, avoiding the second half ring from swinging in the process of installing the threaded rod.

[0015] As a preferred solution of the utility model, mounting grooves are respectively provided on both sides of the threaded rod, and a limit block is provided in the mounting groove, and the limit block is connected to the inner wall of the mounting groove through a spring, and the limit block is used to abut the lower end surface of the plug plate. Pressing the limit block can make the limit block embedded in the mounting groove of the side wall of the threaded rod, and the limit block pops out from the mounting groove after being released, and the popped-out limit block abuts against the bottom of the plug plate, realizing the mutual tension between the plug plate and the mounting plate.

[0016] As a preferred solution of the utility model, an air filling pipe and a pressure gauge are provided on the outer wall of the second semi-ring, and both the air filling pipe and the pressure gauge are connected to the inner cavity of the second semi-ring. When in use, the second semi-ring is filled with air through the air filling pipe. When the air pressure reaches a certain height, the filling is stopped and the value of the pressure gauge is observed. If the value of the pressure gauge decreases slowly, it indicates that there is air leakage in the pipeline. In this way, the pipeline leakage situation can be intuitively and accurately obtained through the pressure gauge to avoid misjudgment.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] The present application sets a base and a support plate, and drives the first half ring on the support plate to be clamped on the natural gas pipeline through a height adjustment mechanism. The installation of the second half ring can leverage the first half ring that has been fixed, reducing the consumption of personnel during the installation process, while also preventing the test device from falling from the pipeline, thereby improving the safety of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a daily gas pipeline air tightness test device of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the mounting plate of the utility model;

[0021] Figure 3 It is a schematic diagram of the connection relationship between the mounting plate and the plug board of the utility model;

[0022] Markings in the figure: 1-base, 2-support plate, 21-clamping plate, 211-arc-shaped slot, 22-pad, 3-height adjustment mechanism, 4-first half ring, 41-insert plate, 411-through slot, 5-second half ring, 51-mounting plate, 511-threaded rod, 512-insert block, 513-limiting block, 514-spring, 52-inflatable tube, 53-barometer, 6-natural gas pipeline. DETAILED DESCRIPTION

[0023] The utility model is described in detail below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] Example 1

[0026] like Figure 1As shown, this embodiment is a natural gas pipeline air tightness testing device, including a base 1 and a support plate 2, a height adjustment mechanism 3 is connected between the base 1 and the support plate 2, a first half ring 4 is arranged on the support plate 2, and a second half ring 5 is detachably connected to the first half ring 4.

[0027] When in use, the base 1 is placed under the natural gas pipeline 6 and located at the pipeline weld, and then the first half ring 4 is installed on the support plate 2. The support plate 2 and the first half ring 4 are driven upward by the height adjustment mechanism 3, so that the first half ring 4 is clamped on the bottom of the natural gas pipeline 6, and then the second half ring 5 is clamped on the top of the natural gas pipeline 6. Finally, the first half ring 4 is connected to the second half ring 5, and the installation of the test device on the natural gas pipeline 6 is realized.

[0028] Specifically, the height adjustment mechanism 3 can adopt a push-type jack, a hydraulic cylinder, a cylinder, a screw lifting structure, etc.

[0029] Furthermore, two clamping plates 21 are provided on the support plate 2, and the first half ring 4 is arranged between the two clamping plates 21, and the two clamping plates 21 are respectively abutted against the two end walls of the first half ring 4. By arranging two clamping plates 21 on the support plate 2, the first half ring 4 is placed between the two clamping plates 21, and the first half ring 4 is positioned by the two clamping plates 21, which can reduce manual support by personnel and make the detection operation more convenient; further, a circular arc-shaped groove 211 adapted to the natural gas pipeline 6 is provided on the top of the clamping plate 21, so that the limiting height of the clamping plate 21 to the first half ring 4 can be increased, thereby improving the stability of the first half ring 4 during use; further, two pads 22 are provided between the two clamping plates 21, and the two pads 22 are respectively abutted against the two sides of the first half ring 4, and the side of the pad 22 close to the first half ring 4 is set to an arc surface shape, which fits with the outer wall of the first half ring 4.

[0030] Example 2

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the first half ring 4 is connected to plug plates 41 on both sides, the second half ring 5 is connected to mounting plates 51 on both sides, and the plug plates 41 and the mounting plates 51 are connected by threaded rods 511.

[0032] In this embodiment, the threaded rod 511 passes through the plug plate and is connected to the mounting plate 51 on the side of the second half ring 5, and the plug plate 41 is tightened to the bottom of the mounting plate 51, thereby realizing a detachable connection between the first half ring 4 and the second half ring 5.

[0033] Furthermore, an insert block 512 is provided at the bottom of the mounting plate 51, and a through groove adapted to the insert block 512 is provided on the insert plate 41, and the threaded rod 511 is connected to the threaded hole on the insert block 512. During installation, the insert block 512 at the bottom of the mounting plate 51 can be first embedded in the through groove on the insert plate 41, and then the two can be tightened and locked by the threaded rod 511, so that the insert block 512 can play a role of pre-positioning to avoid the second half ring 5 from positional deviation during the installation of the threaded rod 511.

[0034] Furthermore, mounting grooves are respectively provided on both sides of the threaded rod 511, and a limit block 513 is provided in the mounting groove. The limit block 513 is connected to the inner wall of the mounting groove by a spring 514, and the limit block 513 is used to abut the lower end surface of the plug plate 41. Pressing the limit block 513 can make the limit block 513 embedded in the mounting groove of the side wall of the threaded rod 511. After loosening, the limit block 513 pops out from the mounting groove, and the limit block 513 after popping out abuts against the bottom of the plug plate 41, thereby realizing mutual tension between the plug plate 41 and the mounting plate 51.

[0035] Example 3

[0036] like Figure 1 As shown, in this embodiment, the difference from Embodiment 1 is that an air filling tube 52 and a pressure gauge 53 are provided on the outer wall of the second semi-ring 5 , and both the air filling tube 52 and the pressure gauge 53 are connected to the inner cavity of the second semi-ring 5 .

[0037] In this embodiment, air is inflated into the second half ring 5 through the inflation tube 52. When the air pressure reaches a certain height, the inflation is stopped and the value of the barometer is observed. If the value of the barometer 53 decreases slowly, it indicates that there is an air leak in the pipeline. In this way, the pipeline leakage situation can be intuitively and accurately obtained through the air pressure gauge 53 to avoid misjudgment.

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

Claims

1. A natural gas pipeline air tightness testing device, characterized in that: It comprises a base (1) and a support plate (2), wherein a height adjustment mechanism (3) is connected between the base (1) and the support plate (2), a first half ring (4) is provided on the support plate (2), and a second half ring (5) is detachably connected to the first half ring (4).

2. The natural gas pipeline air tightness testing device according to claim 1, characterized in that: The height adjustment mechanism (3) is a push-type jack.

3. The natural gas pipeline air tightness testing device according to claim 1, characterized in that: Two clamping plates (21) are provided on the support plate (2), the first half ring (4) is arranged between the two clamping plates (21), and the two clamping plates (21) are respectively in contact with the two end walls of the first half ring (4).

4. The gas pipeline air tightness testing device according to claim 3, characterized in that: The top of the clamping plate (21) is provided with an arc-shaped clamping groove (211) adapted to the natural gas pipeline.

5. The gas pipeline air tightness testing device according to claim 3, characterized in that: Two cushion blocks (22) are provided between the two clamping plates (21), and the two cushion blocks (22) are respectively in contact with two sides of the first half ring (4).

6. The gas pipeline air tightness testing device according to claim 5, characterized in that: A side of the cushion block (22) close to the first half ring (4) is configured in an arc shape.

7. The natural gas pipeline air tightness testing device according to claim 1, characterized in that: The first half ring (4) is connected to an insert plate (41) on both sides, and the second half ring (5) is connected to a mounting plate (51) on both sides; the insert plate (41) and the mounting plate (51) are connected via a threaded rod (511).

8. The natural gas pipeline air tightness testing device according to claim 7, characterized in that: An insert block (512) is provided at the bottom of the mounting plate (51), a through slot adapted to the insert block (512) is provided on the insert plate (41), and the threaded rod (511) is connected to the insert block (512).

9. The natural gas pipeline air tightness testing device according to claim 8, characterized in that: The threaded rod (511) is provided with mounting grooves on both sides respectively. A limit block (513) is provided in the mounting groove. The limit block (513) is connected to the inner wall of the mounting groove via a spring (514). The limit block (513) is used to abut against the lower end surface of the plug plate (41).

10. The natural gas pipeline air tightness testing device according to any one of claims 1 to 9, characterized in that: An air filling tube (52) and a pressure gauge (53) are provided on the outer wall of the second half ring (5), and the air filling tube (52) and the pressure gauge (53) are both in communication with the inner cavity of the second half ring (5).

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