A pipe structure for transporting deep coal seam gas

Abstract

The utility model discloses a pipeline structure of conveying deep coal seam gas, including straight pipe section, the tail end of straight pipe section is connected with three -way valve, one export end of three -way valve is installed with the ball valve, and another export end is fixedly connected with the single -end thread short pipe, and the tail end of single -end thread short pipe is connected with the threaded pipe cap through the threaded connection mode. The ball valve is connected with the collecting pipe through the elbow, and the collecting pipe is communicated with the external equipment, and the inlet end of straight pipe section is installed with the regulating valve, the utility model discloses adopt single -end thread short pipe and threaded pipe cap with threaded connection mode, can realize quick assembly disassembly threaded pipe cap, improves the speed and safety of inspection maintenance, reduces the replacement material and manual cost, and avoids the environmental pollution caused by the dynamic welding.

Description

Technical Field

[0001] This utility model relates to chemical pipelines, specifically a pipeline structure for transporting deep coalbed methane. Background Technology

[0002] Because the produced gas from deep coalbed methane test wells contains corrosive media such as chloride ions and carbon dioxide, and the pressure of the metering skid is high and the medium flow rate is fast, the produced gas inlet and the end of the corner tee valve are severely eroded, and the pipe cap thickness is reduced rapidly, which seriously affects the commissioning and maintenance progress of the unit and the maintenance frequency.

[0003] Traditional pipe caps are connected by welding or with flanged elbows. When welding, if the pipe cap corrodes, thins, or perforates, it needs to be cut off and a new pipe cap welded on. After multiple cuts, the straight pipe length may be shortened, and welding a new pipe cap will change the overall pipe size. When reinstalling the pipe, the upstream section of the pipe that meets the size requirements needs to be replaced, which increases the workload of maintenance and commissioning and seriously affects the normal operation of the entire system. When using flange connections, flanged elbow connections are not only susceptible to corrosion thinning or perforation, but also to leakage at the flange due to thermal expansion and contraction during commissioning, or leakage caused by gasket failure. Utility Model Content

[0004] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a pipeline structure for transporting deep coalbed methane, which adopts a single-ended threaded short pipe and a threaded pipe cap for threaded connection, which can realize quick disassembly and assembly of the threaded pipe cap, improve the speed and safety of inspection and maintenance, reduce the cost of replacing materials and labor, and avoid environmental pollution caused by dynamic welding.

[0005] Specifically, a pipeline structure for transporting deep coalbed methane includes a straight pipe section. A three-way valve is connected to the end of the straight pipe section. A ball valve is installed at one outlet of the three-way valve, and a single-threaded short pipe is fixedly connected to the other outlet. A threaded cap is connected to the end of the single-threaded short pipe via a threaded connection. The ball valve is connected to a manifold via a bend, and this manifold is connected to external equipment. A regulating valve is installed at the inlet end of the straight pipe section.

[0006] Optionally, one end of the threaded cap is an open end with threads, and the other end is a sealed end, with the inner wall of the sealed end being spherical.

[0007] Optionally, a sealing gasket is provided between the single-threaded short pipe and the threaded pipe cap, or a seal is achieved by using a threaded fastening connection.

[0008] This utility model has the following advantages:

[0009] This utility model is a pipeline structure for transporting deep coalbed methane. It adopts a single-ended threaded short pipe and a threaded cap for threaded connection, which can realize quick disassembly and assembly of the threaded cap. Compared with flange or welded installation of the cap, it improves the speed and safety of inspection and maintenance, reduces the cost of replacement materials and labor, and avoids environmental pollution caused by dynamic welding. In addition, the cap replacement speed is fast, has little impact on the operation of the equipment, and is safer. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the pipeline structure for transporting deep coalbed methane as described in this utility model;

[0011] Figure 2 This is a schematic diagram of the connection between a single-threaded short pipe and a threaded pipe cap;

[0012] Figure 3 This is a schematic diagram of the pipeline structure for transporting deep coalbed methane.

[0013] In the diagram: 1. Straight pipe section; 2. Three-way valve; 3. Single-threaded short pipe; 31. External thread; 4. Threaded pipe cap; 41. Internal thread; 5. Ball valve; 6. Manifold; 7. Control valve; 8. Sealing gasket. Detailed Implementation

[0014] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0015] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0016] As described in the background section, traditional pipe caps are connected by welding or with flanged elbows. When welding, if the pipe cap corrodes, thins, or perforates, it needs to be cut off and a new pipe cap re-welded. After multiple cuts, the straight pipe length may be shortened, and welding a new pipe cap will change the overall pipe size. When reinstalling the pipe, the upstream section needs to be replaced to meet the size requirements, increasing the workload of maintenance and commissioning, and seriously affecting the normal operation of the entire system. When using flange connections, flanged elbow connections are susceptible to corrosion thinning or perforation, and there is also the risk of leakage at the flange due to thermal expansion and contraction during commissioning, or leakage caused by gasket failure.

[0017] To address the aforementioned problems, this utility model provides a pipeline structure for transporting deep coalbed methane, comprising a straight pipe section 1, with a three-way valve 2 connected to the tail end of the straight pipe section 1. A ball valve 5 is installed at one outlet end of the three-way valve 2, and a single-threaded short pipe 3 is fixedly connected (by welding) to the other outlet end. A threaded cap 4 is connected to the tail end of the single-threaded short pipe via a threaded connection. The ball valve 5 is connected to a manifold 6 via a bend, and this manifold is connected to external equipment. A regulating valve 7 is installed at the inlet end of the straight pipe section 1.

[0018] Among the aforementioned technical features, the use of a single-threaded short pipe and a threaded cap for threaded connection enables rapid disassembly and assembly of the threaded cap, improving maintenance speed and safety, reducing material and labor costs, and avoiding environmental pollution caused by dynamic welding. Furthermore, the cap replacement is fast, has minimal impact on device operation, and is safer. For example, the connection between the single-threaded short pipe and the threaded cap is an external thread 31, and the threaded cap is an internal thread 41.

[0019] To improve the sealing performance between the threaded cap and the single-threaded short pipe, in one embodiment, a sealing gasket 8 is provided between the single-threaded short pipe and the threaded cap; the sealing performance is improved by the sealing gasket, reducing the risk of media leakage; or the sealing is achieved by using a threaded fastening connection.

[0020] To reduce wear inside the threaded cap, in one embodiment, the threaded cap has one end as an open end with threads and the other end as a sealed end. The inner wall of the sealed end is spherical. Compared to a plane, the impact wear of the medium on the spherical surface is relatively small. The spherical surface can guide the medium within a small range, reducing impact.

[0021] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pipeline structure for transporting deep coalbed methane, comprising a straight pipe section, wherein a three-way valve is connected to the tail end of the straight pipe section, characterized in that, A ball valve is installed at one outlet end of the three-way valve, and a single-threaded short pipe is fixedly connected to the other outlet end. A threaded cap is connected to the tail end of the single-threaded short pipe by a threaded connection.

2. The pipeline structure for transporting deep coalbed methane according to claim 1, characterized in that, The ball valve is connected to a manifold via a bend, and the manifold is connected to an external device.

3. The pipeline structure for transporting deep coalbed methane according to claim 1, characterized in that, A regulating valve is installed at the inlet end of the straight pipe section.

4. The pipeline structure for transporting deep coalbed methane according to claim 1, characterized in that, The threaded cap has a threaded open end at one end and a sealed end at the other end, with the inner wall of the sealed end being spherical.

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