Device for testing bearing pressure of natural gas pipeline

Abstract

The utility model relates to the technical field of pressure testing devices, and discloses a natural gas pipeline bearing pressure testing device which comprises a base, a mounting frame, a displacement mechanism, a pipe end plug, a gas filling pipe, a gas filling mechanism, a pipeline supporting mechanism, an external pressure mechanism, a gas pressure sensor and a display. By the adoption of the structure, the overall structure is simple, a large amount of auxiliary fixing equipment does not need to be replaced, the displacement mechanism can drive the pipe end plug to move so as to be matched with natural gas pipelines with different length sizes, the pipe end plug is detachably connected to the inner end of the displacement mechanism, simple replacement of the pipe end plug can be conducted, and the replacement efficiency is improved. Therefore, natural gas pipelines with different inner diameters are matched; meanwhile, air pressure information in the natural gas pipeline can be displayed through the displayer, and observation by an operator is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure testing devices, in particular to a natural gas pipeline pressure bearing testing device. Background Art

[0002] A natural gas pipeline is a pipeline that transports natural gas (including associated gas produced by oil fields) from the mining site or processing plant to the urban gas distribution center or industrial enterprise user. It is also called a gas transmission pipeline. Using a natural gas pipeline to transport natural gas is a way to transport a large amount of natural gas on land. Natural gas pipelines need to undergo safety inspections after production, such as: appearance inspection, wall thickness measurement, non-destructive testing, leak detection, metallographic analysis, corrosion detection, and pressure testing. Existing pressure testing devices have certain disadvantages when used: (1) The existing pressure testing devices are complex in structure when used; (2) When the existing pressure testing devices are used, due to the diversity of natural gas pipeline sizes, a variety of fixed equipment is required to assist, resulting in an increase in the economic cost of the inspection. Utility Model Content

[0003] The utility model mainly provides a natural gas pipeline pressure bearing test device to solve the problems existing in the prior art.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A natural gas pipeline pressure test device includes a base, two mounting frames are arranged on the base, each mounting frame is provided with a displacement mechanism, the inner end of the displacement mechanism is detachably connected with a pipe end plug, and the pipe end plug is displaced by the displacement mechanism, a gas filling pipe is arranged on any of the pipe end plugs, and the gas filling pipe is connected with an air filling mechanism, a pipeline support mechanism is arranged on the base between the two mounting frames, and an external pressure mechanism is arranged at a position above the corresponding pipeline support structure; it also includes an air pressure sensor placed in the pipeline to be tested, and a display arranged on the base and connected to the air pressure sensor signal. Among them, the air filling mechanism can adopt existing technology, as long as it can realize the air delivery in the natural gas pipeline. When in use, the natural gas pipeline to be tested is placed on the pipeline support mechanism, the air pressure sensor is placed in the natural gas pipeline, the pipe end plugs at both ends are driven to move by the displacement mechanism, and the two ends of the natural gas pipeline are inserted to seal, and the gas is transported into the natural gas pipeline by the inflation mechanism, and the transportation is stopped after the air pressure information detected by the air pressure sensor is stable, and then the natural gas pipeline is pressed down by the external pressure mechanism. When the pipeline is damaged, the gas in the natural gas pipeline leaks, and the air pressure information detected by the air pressure sensor will drop, thereby performing a pressure test on the natural gas pipeline. The structure of the present application is simple in overall structure, and does not require a large number of replacements of auxiliary fixed equipment. The pipe end plugs can be driven to move by the displacement mechanism to match natural gas pipelines of different lengths, and the pipe end plugs can be detachably connected to the inner end of the displacement mechanism, and the pipe end plugs can be simply replaced to match natural gas pipelines of different inner diameters; at the same time, the air pressure information in the natural gas pipeline can be displayed on a display, which is convenient for the operator to observe.

[0006] Furthermore, the displacement mechanism includes a displacement screw threadedly connected to the mounting frame, and a displacement guide rod slidably connected to the mounting frame, the inner end of the displacement screw is rotatably connected to a connecting column, the inner end of the connecting column is detachably connected to the pipe end plug, and the inner end of the displacement guide rod is detachably connected to the pipe end plug. With this structure, the displacement screw can be rotated to cooperate with the displacement guide rod and the connecting column to drive the pipe end plug to move, and the end of the natural gas pipeline can be sealed.

[0007] Furthermore, the pipeline support mechanism includes a support seat installed on the base, a lifting screw threadedly connected to the base, and a V-shaped holder rotatably connected to the upper end of the lifting screw; a lifting guide rod is provided on the lower side of the V-shaped holder, the lifting guide rod is slidably connected to the support seat, and the lower end of the lifting screw passes through the outside of the support seat; an operating groove for matching the lifting screw is provided on the base. An observation hole through which the lifting screw passes is provided on the base, and the lower end of the lifting screw passes through the operating groove. With this structure, the height of the V-shaped holder can be adjusted by rotating the lifting screw in coordination with the lifting guide rod, so as to match natural gas pipelines with different outer diameters and thicknesses for testing, and the setting of the V-shaped holder can prevent the natural gas pipeline from moving during testing to ensure the detection effect.

[0008] Furthermore, the external pressure mechanism includes a bracket arranged on the base and a power assembly arranged on the bracket; a push rod is arranged at the output end of the power assembly, a pressure sensor is arranged at the lower end of the push rod, a V-shaped pressure block is arranged at the lower end of the pressure sensor, a limit guide rod is arranged on the V-shaped pressure block, and the limit guide rod is slidably connected to the bracket; the pressure sensor is connected to the display signal. Among them, the power assembly can adopt the existing technology, as long as it can drive the corresponding mechanism to descend and apply external pressure to the natural gas pipeline. With this structure, the corresponding components can be driven to descend by the power assembly, thereby applying pressure to the natural gas pipeline, and the pressure information can be detected by the pressure sensor, and the pressure information can be displayed on the display at the same time, which is convenient for the operator to observe and record.

[0009] Furthermore, the pipe end plug includes a truncated cone rotatably connected to the displacement screw and a rubber sealing ring arranged outside the truncated cone, and the gas filling pipe is arranged on the truncated cone. With this structure, it is easy to connect the end of the natural gas pipeline and can achieve good sealing.

[0010] Beneficial effects: The structure of the present application has a simple overall structure and does not require a large number of replacements of auxiliary fixed equipment. The pipe end plugging head can be driven to move through the displacement mechanism to accommodate natural gas pipelines of different lengths, and the pipe end plugging head can be detachably connected to the inner end of the displacement mechanism, so that the pipe end plugging head can be simply replaced to accommodate natural gas pipelines of different inner diameters; at the same time, the air pressure information in the natural gas pipeline can be displayed on a display, which is convenient for the operator to observe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic front view of the base of this embodiment;

[0012] Figure 2 This is a side-section diagram of your father's base;

[0013] Figure 3 For this embodiment Figure 1 A is an enlarged schematic diagram.

[0014] Figure numerals: base 1, mounting frame 2, gas filling pipe 3, air pressure sensor 4, display 5, displacement screw 6, displacement guide rod 7, connecting column 8, support seat 9, lifting screw 10, V-shaped holder 11, lifting guide rod 12, operating groove 13, bracket 14, power assembly 15, push rod 16, pressure sensor 17, V-shaped pressure block 18, limit guide rod 19, frustum 20, rubber sealing ring 21. DETAILED DESCRIPTION

[0015] The technical solution of a natural gas pipeline pressure testing device involved in the utility model will be further described in detail below in conjunction with embodiments.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] like Figure 1 , Figure 2 , Figure 3As shown, a natural gas pipeline pressure test device of this embodiment includes a base 1, two mounting frames 2 are arranged on the base 1, each of the mounting frames 2 is provided with a displacement mechanism, the inner end of the displacement mechanism is detachably connected with a pipe end plug, and the pipe end plug is displaced by the displacement mechanism, a gas filling pipe 3 is arranged on any of the pipe end plugs, and the gas filling pipe 3 is connected with an inflating mechanism, a pipeline support mechanism is arranged on the base 1 between the two mounting frames 2, and an external pressure mechanism is arranged at a position corresponding to the upper part of the pipeline support structure; it also includes an air pressure sensor 4 placed in the pipeline to be tested, and a display 5 arranged on the base 1 and connected to the signal of the air pressure sensor 4. The displacement mechanism includes a displacement screw 6 threadedly connected to the mounting frame 2, and a displacement guide rod 7 slidably connected to the mounting frame 2, the inner end of the displacement screw 6 is rotatably connected with a connecting column 8, the inner end of the connecting column 8 is detachably connected to the pipe end plug, and the inner end of the displacement guide rod 7 is detachably connected to the pipe end plug. The pipeline support mechanism includes a support seat 9 installed on the base 1, a lifting screw 10 threadedly connected to the base 1, and a V-shaped clamping seat 11 rotatably connected to the upper end of the lifting screw 10; a lifting guide rod 12 is arranged on the lower side of the V-shaped clamping seat 11, and the lifting guide rod 12 is slidably connected to the support seat 9, and the lower end of the lifting screw 10 passes through the outside of the support seat 9; an operating groove 13 is provided on the base 1 to match the lifting screw 10. The external pressure mechanism includes a bracket 14 arranged on the base 1, and a power assembly 15 arranged on the bracket 14; a push rod 16 is arranged at the output end of the power assembly 15, and a pressure sensor 17 is arranged at the lower end of the push rod 16, and a V-shaped pressure block 18 is arranged at the lower end of the pressure sensor 17, and a limit guide rod 19 is arranged on the V-shaped pressure block 18, and the limit guide rod 19 is slidably connected to the bracket 14; the pressure sensor 17 is connected to the display 5 signal. The pipe end plugging head includes a truncated cone 20 rotatably connected to the displacement screw 6, and a rubber sealing ring 21 arranged on the outside of the truncated cone 20, and the gas filling pipe 3 is arranged on the truncated cone 20. When in use, the natural gas pipeline to be tested is placed on the pipeline support mechanism, and the air pressure sensor 4 is placed in the natural gas pipeline. The pipe end plugging heads at both ends are driven to move by the displacement mechanism, and inserted into the two ends of the natural gas pipeline for sealing. The gas is transported in the natural gas pipeline through the inflator, and the transportation is stopped after the air pressure information detected by the air pressure sensor 4 is stable. Then, the natural gas pipeline is pressed down by the external pressure mechanism. When the pipeline is damaged, the gas in the natural gas pipeline leaks, and the air pressure information detected by the air pressure sensor 4 will drop, thereby performing a pressure test on the natural gas pipeline.By adopting the structure of the present application, the overall structure is simple, and there is no need to replace a large number of auxiliary fixed equipment. The pipe end plug can be driven to move through the displacement mechanism to accommodate natural gas pipelines of different lengths, and the pipe end plug can be detachably connected to the inner end of the displacement mechanism, and the pipe end plug can be simply replaced to accommodate natural gas pipelines of different inner diameters; at the same time, the air pressure information in the natural gas pipeline can be displayed through the display 5, which is convenient for the operator to observe.

[0018] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A natural gas pipeline pressure test device, characterized by: It includes a base, on which two mounting frames are arranged, each of which is provided with a displacement mechanism, the inner end of the displacement mechanism is detachably connected with a pipe end plug, and the pipe end plug is displaced by the displacement mechanism, an air filling pipe is arranged on any of the pipe end plugs, and the air filling pipe is connected with an inflation mechanism, a pipeline support mechanism is arranged on the base between the two mounting frames, and an external pressure mechanism is arranged at a position corresponding to the upper part of the pipeline support structure; it also includes an air pressure sensor placed in the pipeline to be tested, and a display arranged on the base and connected with the air pressure sensor signal.

2. A natural gas pipeline pressure test device according to claim 1, characterized in that: The displacement mechanism includes a displacement screw threadedly connected to the mounting frame, and a displacement guide rod slidably connected to the mounting frame, the inner end of the displacement screw is rotatably connected to a connecting column, the inner end of the connecting column is detachably connected to the pipe end plug, and the inner end of the displacement guide rod is detachably connected to the pipe end plug.

3. A natural gas pipeline pressure test device according to claim 1, characterized in that: The pipeline support mechanism includes a support seat installed on the base, a lifting screw threadedly connected to the base, and a V-shaped socket rotatably connected to the upper end of the lifting screw; a lifting guide rod is provided on the lower side of the V-shaped socket, the lifting guide rod is slidably connected to the support seat, and the lower end of the lifting screw passes through the outside of the support seat; an operating groove for cooperating with the lifting screw is opened on the base.

4. A natural gas pipeline pressure test device according to claim 1, characterized in that: The external pressure mechanism includes a bracket arranged on the base and a power assembly arranged on the bracket; a push rod is arranged at the output end of the power assembly, a pressure sensor is arranged at the lower end of the push rod, a V-shaped pressure block is arranged at the lower end of the pressure sensor, a limit guide rod is arranged on the V-shaped pressure block, and the limit guide rod is slidably connected to the bracket; the pressure sensor is connected to the display signal.

5. A natural gas pipeline pressure test device according to claim 2, characterized in that: The pipe end plugging head includes a truncated cone rotatably connected to the displacement screw, and a rubber sealing ring arranged on the outside of the truncated cone, and the air filling pipe is arranged on the truncated cone.

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