Nitrogen confluence gas replacement device of gas pipeline

Abstract

The utility model discloses a nitrogen confluence gas replacement device of a gas pipeline, which comprises a pipeline framework, the pipeline framework comprises a gas inlet pipeline, a gas outlet pipeline and at least one connecting pipeline, and the connecting pipeline is arranged between the gas inlet pipeline and the gas outlet pipeline and is respectively communicated with the gas inlet pipeline and the gas outlet pipeline. The gas inlet pipeline is provided with at least one gas inlet valve, the gas outlet pipeline is provided with at least one gas outlet valve and a flow control assembly, the gas outlet valve is arranged behind the flow control assembly, and the flow control assembly is used for controlling the flowing-out speed of nitrogen; a fixing assembly is arranged on the connecting pipeline and used for fixing a nitrogen cylinder. The gas pipeline can be communicated with a plurality of nitrogen cylinders at the same time, the nitrogen supply amount during pipeline flushing is guaranteed, and the flow control assembly of the gas outlet pipeline reads the filling replacement amount of nitrogen in the gas pipeline, so that whether natural gas in the gas pipeline is completely replaced or not can be clearly judged, the operation efficiency is improved, and the maintenance safety of the gas pipeline is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of natural gas pipeline cleaning, and in particular relates to a nitrogen converging gas replacement device for a gas pipeline. Background Art

[0002] Natural gas is an indispensable and common energy source in today's society. Natural gas access to households is also a basic requirement for urban development. During the transportation process, gas needs to be transported to households through dedicated natural gas transmission pipelines. Natural gas main pipelines are usually buried deep underground, and inspection ports are usually set at pipeline joints. Natural gas pipelines need to be frequently inspected and maintained. If rust is found, the pipeline needs to be cut and then reconnected. Since natural gas is a flammable gas, even if the pipeline valve is closed, a small amount of natural gas will remain in the pipeline. Cutting is an open flame operation, so the flammable natural gas in the natural gas pipeline must be replaced to avoid accidents. The traditional operation method is to directly flush the gas pipeline with a nitrogen bottle connection hose when replacing gas in the gas pipeline, and then judge whether the replacement is thorough based on experience. It is impossible to read the amount of nitrogen introduced into the gas pipeline through clear data; in addition, if the pipeline is thick and a large amount of nitrogen needs to be introduced, after a bottle of nitrogen is used up, another new bottle of nitrogen needs to be connected, which is cumbersome and inefficient. Utility Model Content

[0003] The purpose of the utility model is to provide a nitrogen converging gas replacement device for a gas pipeline, which can be connected to multiple nitrogen cylinders through a pipeline skeleton, thereby ensuring the nitrogen supply during pipeline flushing, and can read the charging and replacement amount of nitrogen in the gas pipeline through a flow control component, so as to clearly judge whether the natural gas in the gas pipeline is completely replaced.

[0004] The utility model is realized by the following technical solutions:

[0005] A nitrogen converging gas replacement device for a gas pipeline comprises a pipeline skeleton, wherein the pipeline skeleton comprises an inlet pipeline, an outlet pipeline and at least one connecting pipeline, wherein the inlet pipeline and the outlet pipeline are both annular passage structures, wherein the inlet pipeline and the outlet pipeline are arranged at intervals, wherein the connecting pipeline is arranged between the inlet pipeline and the outlet pipeline and is respectively connected to the inlet pipeline and the outlet pipeline, wherein at least one inlet valve is arranged on the inlet pipeline, wherein at least one outlet valve and a flow control component are arranged on the outlet pipeline, wherein the outlet valve is arranged behind the flow control component, wherein the flow control component is used to control the speed and pressure of nitrogen outflow; wherein a fixing component is arranged on the connecting pipeline, wherein the fixing component is used to fix a nitrogen cylinder.

[0006] Furthermore, two connecting pipelines are arranged between the air inlet pipeline and the air outlet pipeline, and the two connecting pipelines are arranged in parallel and at intervals in the upper and lower parts.

[0007] Furthermore, a first pressure gauge is provided on the air intake pipeline.

[0008] Furthermore, the fixing assembly includes a clamping member and a locking buckle, wherein the clamping member is used to clamp the nitrogen cylinder, and the locking buckle is used to lock the clamping member.

[0009] Furthermore, the flow control component includes a throttling stop valve, and the throttling stop valve is used to control the outflow rate of nitrogen.

[0010] Furthermore, the flow control component includes a flow meter and a second pressure gauge, both of which are arranged between the throttling stop valve and the outlet valve, the flow meter is used to read the flow data of nitrogen, and the second pressure gauge is used to read the pressure of the nitrogen after confluence.

[0011] Furthermore, reinforcing beams are provided on both the air inlet pipeline and the air outlet pipeline.

[0012] Furthermore, a wheel set is arranged below the pipeline skeleton.

[0013] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0014] In the utility model, an air inlet pipeline, an air outlet pipeline and a connecting pipeline which are interconnected are arranged on the pipeline skeleton; a plurality of air inlet valves are arranged on the air inlet pipeline, and a plurality of nitrogen bottles can be connected at the same time, thereby ensuring the nitrogen supply during pipeline flushing; a flow control component is arranged on the air outlet pipeline, and the filling and replacement amount of nitrogen in the gas pipeline can be read through the flow control component, so that it can be clearly judged whether the natural gas in the gas pipeline is completely replaced, thereby improving the working efficiency and ensuring the safety of gas pipeline maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a side view of the nitrogen converging gas replacement device of the gas pipeline of the utility model.

[0017] Figure 2 It is a top view of the nitrogen converging gas replacement device for the gas pipeline of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the air intake pipeline in the nitrogen converging gas replacement device of the gas pipeline of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the gas outlet pipeline in the nitrogen converging gas replacement device of the gas pipeline of the utility model.

[0020] Among them: 1-intake pipeline, 11-intake valve, 12-first pressure gauge, 2-outlet pipeline, 21-outlet valve, 22-second pressure gauge, 23-throttle stop valve, 24-flow meter, 3-connecting pipeline, 31-hoop, 4-reinforcement beam, 5-wheel assembly, 6-nitrogen cylinder. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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.

[0022] Embodiment 1:

[0023] The main structure of this embodiment is a nitrogen converging gas replacement device for a gas pipeline, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a pipeline skeleton, the pipeline skeleton includes an air intake pipeline 1, an air outlet pipeline 2 and at least one connecting pipeline 3, the air intake pipeline 1 and the air outlet pipeline 2 are both annular passage structures, the air intake pipeline 1 and the air outlet pipeline 2 are arranged at intervals, the connecting pipeline 3 is arranged between the air intake pipeline 1 and the air outlet pipeline 2 and is communicated with the air intake pipeline 1 and the air outlet pipeline 2 respectively, the air intake pipeline 1 is provided with at least one air intake valve 11, the air outlet pipeline 2 is provided with at least one air outlet valve 21 and a flow control component, the air outlet valve 21 is arranged behind the flow control component, and the flow control component Used to control the speed and pressure of nitrogen outflow; a fixing component is arranged on the connecting pipeline 3, and the fixing component is used to fix the nitrogen bottle 6; reinforcing beams 4 are arranged on the air inlet pipeline 1 and the air outlet pipeline 2; a wheel group 5 is arranged under the pipeline skeleton; two connecting pipelines 3 are arranged between the air inlet pipeline 1 and the air outlet pipeline 2, and the two connecting pipelines 3 are distributed parallel and spaced apart from each other in the upper and lower parts; the fixing component includes a hoop 31 and a lock buckle, the hoop 31 is used to clamp the nitrogen bottle 6, and the lock buckle is used to lock the hoop 31, and a first pressure gauge 12 is arranged on the air inlet pipeline 1.

[0024] The pipeline skeleton includes an air inlet pipeline 1, an air outlet pipeline 2 and two connecting pipelines 3. The air inlet pipeline 1 and the air outlet pipeline 2 are both rectangular structures, and a reinforcing beam 4 is arranged in the middle. The reinforcing beam 4 is used to stabilize the air inlet pipeline 1 and the air outlet pipeline 2 so that the air inlet pipeline 1 and the air outlet pipeline 2 can maintain stable support. Two connecting pipelines 3 are arranged between the air inlet pipeline 1 and the air outlet pipeline 2. The connecting pipelines 3 are respectively arranged above and below the air inlet pipeline 1 and the air outlet pipeline 2, and are used to connect the air inlet pipeline 1 and the air outlet pipeline 2, and can Provide stable support to keep the air inlet pipeline 1 and the air outlet pipeline 2 stable. The two connecting pipelines 3 are spaced apart and arranged in parallel. Six air inlet valves 11 are arranged on the air inlet pipeline 1. The six air inlet valves 11 are spaced apart. Six nitrogen bottles 6 can be connected at the same time to ensure sufficient supply of nitrogen. In addition, when the nitrogen in some nitrogen bottles 6 is used up, the nitrogen bottles 6 can be replaced in time to ensure continuous supply of nitrogen. At the same time, six groups of hoop parts 31 are correspondingly arranged on the upper and lower connecting pipelines 3. The upper connecting pipeline 3 and the lower connecting pipeline 3 are connected to each other. The same side of the square connecting pipeline 3 is respectively provided with three groups of hoop members 31, each of which is provided with a lock buckle. The hoop member 31 is used to hold the nitrogen bottle 6 tightly, fix the nitrogen bottle 6 on the connecting pipeline 3, and support the nitrogen bottle 6 by using the inlet pipeline 1 and the outlet pipeline 2, and make the nitrogen converge at the same time; two outlet valves 21 are provided on the outlet pipeline 2, and the two outlet valves 21 are arranged at intervals. A flow control component is also provided between the outlet valve 21 and the outlet pipeline 2, and the flow control component can control and read The nitrogen output volume and speed are measured to more intuitively judge whether the amount of replacement nitrogen filled into the gas pipeline is sufficient, thereby avoiding nitrogen waste and ensuring the safety of subsequent cutting operations; in order to facilitate the movement of the nitrogen bottle 6, a wheel group 5 is provided under the air inlet pipeline 1 and the air outlet pipeline 2, which can push the pipeline skeleton to move, save manpower, and reduce the number of times the nitrogen bottle 6 is transported and disassembled; a first pressure gauge 12 is provided on the air inlet pipeline 1, and the first pressure gauge 12 can observe the outflow pressure of nitrogen from the nitrogen bottle 6.

[0025] Embodiment 2:

[0026] Based on the above embodiments, the present embodiment further defines a flow control component, which includes a throttling stop valve 23, and the throttling stop valve 23 is used to control the outflow speed of nitrogen; the flow control component includes a flow meter 24 and a second pressure gauge 22, and the flow meter 24 and the second pressure gauge 22 are both arranged between the throttling stop valve 23 and the outlet valve 21, the flow meter 24 is used to read the flow data of nitrogen, and the second pressure gauge 22 is used to read the pressure of nitrogen after confluence.

[0027] The flow control assembly includes a second pressure gauge 22, a throttling stop valve 23 and a flow meter 24. The pressure of a nitrogen bottle 6 is 15Mpa. After the pressure is reduced by the self-contained pressure reducing device, the output pressure of the nitrogen is about 0.4Mpa. Then the nitrogen passes through the cut-off valve, and the flow of the nitrogen is controlled by the throttling stop valve 23. The total outflow data of the nitrogen is displayed by the flow meter 24, and the pressure value of the nitrogen after the confluence is displayed by the second pressure gauge 22. The nitrogen is finally output through the outlet valve 21 and enters the gas pipeline for gas replacement. The other parts of this embodiment are the same as the above embodiment, and will not be repeated here.

[0028] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when used. They are only for the convenience of describing the present utility model and simplifying the description, and do 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 utility model.

[0029] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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.

[0031] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A nitrogen converging gas replacement device for a gas pipeline, characterized in that: It comprises a pipeline skeleton, the pipeline skeleton comprises an air inlet pipeline, an air outlet pipeline and at least one connecting pipeline, the air inlet pipeline and the air outlet pipeline are both annular passage structures, the air inlet pipeline and the air outlet pipeline are arranged at intervals, the connecting pipeline is arranged between the air inlet pipeline and the air outlet pipeline and is communicated with the air inlet pipeline and the air outlet pipeline respectively, at least one air inlet valve is arranged on the air inlet pipeline, at least one air outlet valve and a flow control component are arranged on the air outlet pipeline, the air outlet valve is arranged behind the flow control component, and the flow control component is used to control the speed and pressure of nitrogen outflow; a fixing component is arranged on the connecting pipeline, and the fixing component is used to fix the nitrogen cylinder.

2. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: Two connecting pipelines are arranged between the air inlet pipeline and the air outlet pipeline, and the two connecting pipelines are arranged in parallel and at intervals in the upper and lower parts.

3. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: The air intake pipeline is provided with a first pressure gauge.

4. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: The fixing assembly comprises a hoop and a lock, wherein the hoop is used to hold the nitrogen cylinder tightly, and the lock is used to lock the hoop.

5. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: The flow control component comprises a throttling stop valve, and the throttling stop valve is used to control the outflow speed of nitrogen.

6. The nitrogen converging gas replacement device for a gas pipeline according to claim 5, characterized in that: The flow control component includes a flow meter and a second pressure gauge, both of which are arranged between the throttling stop valve and the air outlet valve. The flow meter is used to read the flow data of nitrogen, and the second pressure gauge is used to read the pressure of nitrogen after confluence.

7. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: The air inlet pipeline and the air outlet pipeline are both provided with reinforcement beams.

8. The nitrogen converging gas replacement device for a gas pipeline according to claim 1, characterized in that: A wheel set is arranged below the pipeline skeleton.

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