Nitrogen replacement device for natural gas pipeline

Abstract

The utility model provides a nitrogen replacement device for a natural gas pipeline. The nitrogen replacement device comprises a vertical pipe connected to a natural gas main pipeline, one end of the transverse pipe is closed, and the other end of the transverse pipe is connected with a nitrogen injection connector; a bolt is fixed on the hoop on the natural gas main pipeline; a supporting rod is arranged above the hoop, a transverse plate is fixed to the end of the supporting rod, a sliding way is formed in the upper portion of the transverse plate, two sliding blocks are arranged on the sliding way, a supporting plate is arranged above one sliding block, and a balance weight is arranged above the other sliding block. And the supporting plate is supported below the transverse pipe. The supporting rod is matched with the transverse plate, the supporting plate and the balance weight are movably arranged on the transverse plate, the supporting plate can bear the transverse pipe in a position changing mode, deflection force is reduced as much as possible through the balance weight, and stability is enhanced; nitrogen is repeatedly injected into and discharged out of the transverse pipe, natural gas in the pipeline is replaced out, and whether the natural gas in the pipeline is completely discharged or not is determined by detecting the content of the natural gas in the discharged gas for multiple times.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas pipeline detection technical field especially is related to a natural gas pipeline nitrogen replacement device. BACKGROUND

[0002] Natural gas as the important energy of now, use more and more, but natural gas pipeline remains natural gas to be easy to have danger. So whether natural gas remains in natural gas pipeline is the matter concerning safety, and the detection of whether natural gas remains in natural gas pipeline is particularly important.

[0003] Therefore, the natural gas pipeline nitrogen replacement device is urgently needed to determine whether natural gas is completely discharged from the natural gas pipeline. UTILITY MODEL CONTENT

[0004] The utility model embodiment provides a natural gas pipeline nitrogen replacement device to solve the problem that whether natural gas is completely discharged from the natural gas pipeline is not easy to determine.

[0005] In order to overcome the above technical problems, according to the embodiment of the utility model, a natural gas pipeline nitrogen replacement device is provided, which comprises

[0006] The vertical pipe is connected to the natural gas main pipeline, the top of the vertical pipe is communicated with the transverse pipe, one end of the transverse pipe is closed, the other end is connected with the nitrogen injection interface, the diffusing pipe and the detection pipe are also communicated on the transverse pipe, the diffusing ball valve and the flame arrester are sequentially arranged on the diffusing pipe, the detection ball valve is arranged on the detection pipe, and the end of the detection pipe extends downward.

[0007] The clamp is bolted on the natural gas main pipeline, the support rod is arranged above the clamp, the horizontal plate is fixed at the end of the support rod, the slide is formed in the upper portion of the horizontal plate, two sliding blocks are arranged on the slide, the supporting plate is arranged above one of the sliding blocks, and the counterweight is arranged above the other sliding block.

[0008] In some embodiments, the transverse pipe is also provided with a temperature table, a pressure table and a gas flow rate table through pipelines respectively.

[0009] In some embodiments, the pipeline of the pressure table is provided with a needle valve.

[0010] In some embodiments, the temperature table is arranged opposite to the vertical pipe.

[0011] In some embodiments, the nitrogen injection interface is provided with an injection ball valve.

[0012] In some embodiments, the transverse pipe is provided with a grounding point and grounded through a wire.

[0013] In some embodiments, the support rod is supported at a middle position of the horizontal plate.

[0014] In some embodiments, the slide is in a cross state with the horizontal pipe.

[0015] In some embodiments, the supporting plate is rotatably arranged above one of the sliding blocks.

[0016] The technical scheme provided by the embodiment of the utility model can have the following beneficial effects:

[0017] The utility model discloses a vertical pipe and horizontal pipe are connected on the natural gas main pipeline, and the gas in the natural gas main pipeline is led out, and the support rod is used in cooperation with the horizontal plate, the supporting plate and the counterweight are movably arranged on the horizontal plate, the supporting plate can change position and support the horizontal pipe, and the counterweight is used to reduce the deflection force as much as possible and enhance the stability, nitrogen is injected into the horizontal pipe repeatedly, nitrogen is discharged, the natural gas in the pipeline is replaced, the natural gas content in the discharged gas is detected for many times, and whether the natural gas in the pipeline is completely discharged is determined. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings incorporated into the specification and forming a part thereof show embodiments consistent with the utility model and serve to explain the principles of the utility model together with the specification.

[0019] Fig. 1 It is a structure schematic view of a natural gas pipeline nitrogen replacement device disclosed by the embodiment of the utility model,

[0020] Fig. 2 It is a horizontal plate top view disclosed by the embodiment of the utility model,

[0021] Fig. 3 It is a horizontal plate left view disclosed by the embodiment of the utility model.

[0022] In the drawing, 1, vertical pipe, 2, horizontal pipe, 3, nitrogen injection interface, 4, diffusion pipe, 5, detection pipe, 6, diffusion ball valve, 7, flame arrester, 8, detection ball valve, 9, clamp, 10, support rod, 11, horizontal plate, 12, slide, 13, sliding block, 14, supporting plate, 15, counterweight, 16, thermometer, 17, pressure gauge, 18, gas flow rate table, 19, needle valve, 20, injection ball valve, 21, grounding point. DETAILED DESCRIPTION

[0023] The drawings are only used for exemplary illustration, and the representation is only a schematic diagram, not a physical diagram, and cannot be understood as a limitation on the patent; in order to better illustrate the embodiments of the utility model, some components in the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it can be understood that some well-known structures in the drawings and their descriptions can be omitted.

[0024] The same or similar reference numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the terms 'upper', 'lower', 'left', 'right', 'inner', 'outer' and the like indicate the orientation or positional relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] As Figs. 1-3 As shown in one of the specific embodiments of the natural gas pipeline nitrogen replacement device, a vertical pipe 1 is connected to the natural gas main pipeline, the vertical pipe 1 can be connected to the interface position of the original pressure gauge of the natural gas main pipeline, so that the natural gas main pipeline does not need to be re-opened, which depends on the site condition, and the installation of the vertical pipe 1 is a routine technical means for those skilled in the art, which will not be described here. The top of the vertical pipe 1 is communicated with a horizontal pipe 2, one end of the horizontal pipe 2 is closed, and the other end is connected with a nitrogen injection interface 3, which is used for repeatedly injecting nitrogen into the pipeline. A diffusion pipe 4 and a detection pipe 5 are also communicated on the horizontal pipe 2, and the diffusion pipe 4 and the detection pipe 5 extend from bottom to top, so that the diffusion pipe 4 and the detection pipe 5 are vertically installed on the horizontal pipe 2. The diffusion pipe 4 is sequentially provided with a diffusion ball valve 6 and a flame arrester 7 from bottom to top, which are used for opening and closing the diffusion pipe 4 and achieving the requirement of flame arrest. The detection pipe 5 is provided with a detection ball valve 8, which is used for opening and closing the detection pipe 5, and the end of the detection pipe 5 extends downward, which is convenient for collecting and detecting the gas at this position.

[0026] In addition, since a plurality of components are installed on the transverse pipe 2, the transverse pipe 2 is only supported by the vertical pipe 1, and the transverse pipe 2 is prone to be off-set, which causes the interface to be unstable. In order to improve the stability of the transverse pipe 2, the hoop 9 is bolted on the natural gas main pipe. The support rod 10 is welded above the hoop 9, the support rod 10 extends upward, the end of the support rod 10 is welded with the horizontal plate 11, and the support rod 10 is supported at the middle position of the horizontal plate 11. The slide 12 is formed above the horizontal plate 11, and the slide 12 is in a cross state with the transverse pipe 2. The two sliding blocks 13 are installed on the slide 12, the bearing is installed above one of the sliding blocks 13, and the supporting plate 14 is installed above the bearing. The counterweight 15 is bolted above the other sliding block 13. The positions of the supporting plate 14 and the counterweight 15 on the horizontal plate 11 can be moved, and the supporting plate 14 is supported below the transverse pipe 2. Since the transverse pipe 2 is not parallel to the natural gas main pipe due to installation accuracy or various component off-set factors during the installation process, the sliding block 13 with the supporting plate 14 is moved to the lower side of the transverse pipe 2. The supporting plate 14 is rotatably installed above the sliding block 13, the transverse pipe 2 is placed on the supporting plate 14 by rotating the supporting plate 14, the other sliding block 13 is slid to the other side, the counterweight 15 is on the different side of the transverse pipe 2, the off-set force is offset, and the stability is improved.

[0027] In other embodiments, in addition to the above technical features, the temperature meter 16, the pressure meter 17 and the gas flow rate meter 18 are respectively installed on the transverse pipe 2 through pipelines. Specifically, the needle valve 19 is installed on the pipeline of the pressure meter 17, and is used to control the on-off of the pressure meter 17. The temperature meter 16 is installed at a position opposite to the vertical pipe 1, and is used to test the temperature. The injection ball valve 20 is installed at the nitrogen injection interface 3, and is used to inject nitrogen into the transverse pipe 2 repeatedly, and to discharge the nitrogen, so that the natural gas in the pipeline is replaced. The natural gas content in the discharged gas is detected for multiple times, so that whether the natural gas in the pipeline is completely discharged is determined.

[0028] Meanwhile, the grounding point 21 is installed on the transverse pipe 2, and is grounded through a wire, so that some static electricity is eliminated.

[0029] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are considered exemplary only, and the true scope and spirit of the application is indicated by the following claims. Other implementations of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The specification and examples given are considered exemplary only, and the true scope and spirit of the application is indicated by the following claims.

[0030] It should be understood that the present application is not limited to the precise construction which has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the present application. The scope of the present application is limited only by the appended claims.

Claims

1. A nitrogen purging device for a natural gas pipeline, characterized in that, include A vertical pipe (1) is connected to the main natural gas pipeline; a horizontal pipe (2) is connected to the top of the vertical pipe (1), one end of the horizontal pipe (2) is closed, and the other end is connected to a nitrogen injection port (3); a vent pipe (4) and a detection pipe (5) are also connected to the horizontal pipe (2), a vent ball valve (6) and a flame arrester (7) are installed on the vent pipe (4) in sequence, and a detection ball valve (8) is installed on the detection pipe (5); the end of the detection pipe (5) extends downward; A clamp (9) is bolted to the main natural gas pipeline; a support rod (10) is provided above the clamp (9), and a horizontal plate (11) is fixed to the end of the support rod (10). A slide (12) is provided above the horizontal plate (11), and two sliders (13) are provided on the slide (12). A support plate (14) is provided above one slider (13), and a counterweight (15) is provided above the other slider (13). The support plate (14) supports the horizontal pipe (2) below.

2. The nitrogen replacement device for natural gas pipelines according to claim 1, characterized in that, The transverse pipe (2) is also equipped with a thermometer (16), a pressure gauge (17) and a gas flow rate gauge (18) respectively via pipelines.

3. The nitrogen replacement device for natural gas pipelines according to claim 2, characterized in that, A needle valve (19) is installed on the pipeline of the pressure gauge (17).

4. The nitrogen replacement device for natural gas pipelines according to claim 2, characterized in that, The thermometer (16) is positioned directly opposite the vertical pipe (1).

5. The nitrogen replacement device for natural gas pipelines according to claim 1, characterized in that, An injection ball valve (20) is provided at the nitrogen injection port (3).

6. The nitrogen replacement device for natural gas pipelines according to claim 1, characterized in that, The transverse tube (2) is provided with a grounding point (21) and is grounded through a wire.

7. The nitrogen replacement device for natural gas pipelines according to claim 1, characterized in that, The support rod (10) is supported in the middle of the horizontal plate (11).

8. The nitrogen replacement device for natural gas pipelines according to claim 7, characterized in that, The slide (12) intersects with the transverse tube (2).

9. The nitrogen replacement device for natural gas pipelines according to claim 7, characterized in that, The tray (14) is rotatably disposed above one of the sliders (13).

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