Throttling pressure regulating device

Abstract

The utility model discloses a throttling pressure regulating device, which relates to the technical field of natural gas transportation and comprises a gas inlet pipe group and a gas outlet pipe group which are symmetrically arranged, the gas inlet pipe group is provided with two gas outlets, and the gas outlet pipe group is provided with two gas inlets corresponding to the gas outlets of the gas inlet pipe group. A first conveying pipeline and a second conveying pipeline which are symmetrically arranged are connected between an air outlet of the air inlet pipe set and an air inlet of the air outlet pipe set, and the air inlet pipe set, the air outlet pipe set, the first conveying pipeline and the second conveying pipeline are all connected to the bottom pry. The first conveying pipeline and the second conveying pipeline are arranged between the air inlet pipe group and the air outlet pipe group, so that higher inlet pressure can be reduced to lower outlet pressure required by a user through pressure control; and the outlet pressure is automatically stabilized in a pressure range required by a user under the conditions of gas consumption change and inlet pressure fluctuation, so that the automatic control of downstream distribution flow is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas transportation, in particular to a pressure regulating device. Background Art

[0002] Natural gas pipeline transportation is the most common, economical, and rational method for long-distance, large-scale, and uninterrupted natural gas transportation. The natural gas pipeline transportation system consists of gas transmission stations, pipelines, and related facilities. Gas transmission stations include purification, compression, pressure regulation, and metering facilities to ensure the quality and safety of natural gas during transportation. Pipelines are constructed of high-strength materials, offering corrosion resistance, high pressure resistance, and a long lifespan. Pipeline operation requires strict adherence to operating procedures and regular equipment maintenance and overhaul to ensure stable and safe pipeline transportation. Furthermore, storage and peak-shaving technologies should be considered during pipeline transportation to ensure a stable natural gas supply. Furthermore, pipeline safety management requires the establishment of a comprehensive pipeline safety management system, clear responsibilities at all levels, and regular pipeline inspection and maintenance. During pipeline transportation, pressure regulation must be tailored to actual transportation conditions. The current common pressure regulation method involves direct adjustment through valves, which imposes high pressure on both the valves and the pipeline. Therefore, pressure regulation should be performed slowly, according to pipeline pressure, to avoid damage to the valves caused by overly rapid adjustments. Utility Model Content

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a throttling pressure regulating device, which solves the problem in the prior art that natural gas pipelines cannot quickly regulate pressure during transportation.

[0004] The technical solution of the utility model is achieved as follows: a throttling and pressure regulating device includes a symmetrically arranged air inlet pipe group and an air outlet pipe group, the air inlet pipe group is provided with two air outlets, the air outlet pipe group is provided with two air inlets corresponding to the air outlets of the air inlet pipe group, a symmetrically arranged first delivery pipeline and a second delivery pipeline are connected between the air outlets of the air inlet pipe group and the air inlet of the outlet pipe group, and the air inlet pipe group, the air outlet pipe group, the first delivery pipeline and the second delivery pipeline are all connected to the bottom skid.

[0005] Further preferably, the air inlet pipe group includes a first equal-diameter tee, the air inlet of the first equal-diameter tee is connected to a first necked butt-welded flange, one air outlet of the first equal-diameter tee is connected to a first seamless elbow, and the other air outlet of the first equal-diameter tee is connected to a first connecting pipe and a second seamless elbow.

[0006] Further preferably, the outlet pipe group includes a second equal-diameter tee, the air inlet of the second equal-diameter tee is connected to a second neck-welded flange, one air outlet of the second equal-diameter tee is connected to a third seamless elbow, and the other air outlet of the second equal-diameter tee is connected to a second connecting pipe and a fourth seamless elbow.

[0007] Further preferably, the first delivery pipeline and the second delivery pipeline both include a forged steel ball valve 1, a self-operated safety shut-off valve, a self-operated regulating valve, an electric regulating valve and a forged steel ball valve 2 arranged in sequence, the forged steel ball valve 1 is connected to the air inlet pipe group, a pressure gauge is provided between the self-operated regulating valve and the self-operated safety shut-off valve and the electric regulating valve, a pressure transmitter is provided between the electric regulating valve and the forged steel ball valve 2, and the forged steel ball valve 2 is connected to the air outlet pipe group.

[0008] Further preferably, the input end of the forged steel ball valve 1 is connected to a third necked butt-welding flange, and the third necked butt-welding flange is connected to a spare pipeline.

[0009] Further preferably, the backup pipeline includes a quick connector and a fourth necked butt-welding flange, the fourth necked butt-welding flange is connected to a low-temperature cast steel ball valve, and the low-temperature cast steel ball valve is connected to the quick structure.

[0010] Further preferably, a transition pipe is connected between the electric regulating valve and the second forged steel ball valve, and a vent pipe is connected between the transition pipe of the first delivery pipeline and the transition pipe of the second delivery pipeline.

[0011] Further preferably, the vent pipeline includes two symmetrically arranged fifth necked butt-welded flanges, and the fifth necked butt-welded flanges are sequentially provided with a forged steel ball valve three and a throttling stop vent valve, and the upper parts of the two throttling stop vent valves are connected to a horizontally arranged connecting pipeline, and a vent port is provided at the end of the connecting pipeline.

[0012] Further preferably, the skid includes a bottom support frame, to which are connected vertical support columns respectively cooperating with the air inlet pipe group, the air outlet pipe group, the first delivery pipeline and the second delivery pipeline, and the top of the vertical support column is connected with a clamp.

[0013] Further preferably, the clamp comprises a double-head clamp or a single-head clamp, and the upper portion of the double-head clamp or the single-head clamp is connected to a connecting plate, and the connecting plate is provided with a bottom plate connected to the vertical support column.

[0014] The beneficial effects of the present invention are as follows: the first delivery pipeline and the second delivery pipeline are arranged between the air inlet pipe group and the air outlet pipe group of the present invention, which can realize the higher inlet pressure through pressure control to reduce the incoming gas pressure to the lower outlet pressure required by the user, and automatically stabilize the outlet pressure within the pressure range required by the user when the gas consumption changes and the inlet pressure fluctuates, thereby realizing automatic control of the downstream distribution flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross section of AA;

[0018] Figure 3 for Figure 1 Schematic cross-section of the middle BB;

[0019] Figure 4 This is a schematic diagram of the cooperation between double clamps and pipes;

[0020] Figure 5 This is a schematic diagram of the coordination between a single clamp and a pipe.

[0021] In the figure: 1. First butt-weld neck flange, 2. First equal-diameter tee, 3. Pipe 1, 4. Second seamless elbow, 5. First seamless elbow, 6. Third butt-weld neck flange, 7. First forged steel ball valve, 8. Self-operated safety shut-off valve, 9. Pressure gauge, 10. Self-operated regulating valve, 11. Electric regulating valve, 12. Transition pipe, 13. Second forged steel ball valve, 14. Third seamless elbow, 15. Second equal-diameter tee, 16. Second butt-weld neck flange, 17. Pipe 2, 18. Fourth seamless elbow, 19. Fifth butt-weld neck flange, 20. Third forged steel ball valve, 21. Throttle stop and vent valve, 22. Connecting pipe, 23. Fourth butt-weld neck flange, 24. Low-temperature cast steel ball valve, 25. Quick connector, 26. Skid, 27. Vertical support column, 28. Bottom plate, 29. Connecting plate, 30. Hoop. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1As shown, Example 1 is a throttling and pressure regulating device comprising a symmetrically arranged inlet pipe group and an outlet pipe group, the inlet pipe group being provided with two outlets, the outlet pipe group being provided with two inlets corresponding to the outlets of the inlet pipe group, a symmetrically arranged first delivery pipeline and a second delivery pipeline being connected between the outlets of the inlet pipe group and the inlet of the outlet pipe group, and the inlet pipe group, the outlet pipe group, the first delivery pipeline, and the second delivery pipeline are all connected to a skid 26. The provision of the first delivery pipeline and the second delivery pipeline between the inlet pipe group and the outlet pipe group of this device enables pressure control to reduce a higher inlet pressure to a lower outlet pressure required by the user. Furthermore, the outlet pressure is automatically stabilized within the pressure range required by the user in the event of changes in gas usage and fluctuations in inlet pressure, thereby achieving automatic control of the downstream distribution flow rate.

[0024] In this embodiment, the inlet pipe assembly includes a first equal-diameter tee 2, the inlet of which is connected to a first butt-weld flange 1. A first seamless elbow 5 is connected to one outlet of the first equal-diameter tee 2, and the other outlet of the first equal-diameter tee 2 is connected to a first pipe 3 and a second seamless elbow 4. The outlet pipe assembly includes a second equal-diameter tee 15, the inlet of which is connected to a second butt-weld flange 16. A third seamless elbow 14 is connected to one outlet of the second equal-diameter tee 15, and the other outlet of the second equal-diameter tee 15 is connected to a second pipe 17 and a fourth seamless elbow 18. Both the first equal-diameter tee 2 and the second equal-diameter tee 15 are provided with pipes, which increase the length of the outlet pipes of the equal-diameter tees by one. This allows the entire outlet and inlet pipe assembly to deviate from the center position of the skid 26, resulting in center position adjustment. This ensures the stability of the device according to the actual installation structure during use.

[0025] like Figures 1 to 5As shown, Example 2 is a throttling pressure regulating device. The difference from the technical solution of Example 1 is that the first and second delivery pipelines each include a forged steel ball valve 1 7, a self-operated safety shut-off valve 8, a self-operated regulating valve 10, an electric regulating valve 11, and a forged steel ball valve 2 13, which are arranged in sequence. The forged steel ball valve 1 7 is connected to the air inlet pipe group. A pressure gauge 9 is provided between the self-operated regulating valve 10, the self-operated safety shut-off valve 8, and the electric regulating valve 11. A pressure transmitter is provided between the electric regulating valve 11 and the forged steel ball valve 2 13. The forged steel ball valve 2 13 is connected to the air outlet pipe group. Preferably, the safety shut-off valve is a Q50 series self-operated safety shut-off valve 8, the self-operated regulating valve 10 is a T80 series product, and the electric regulating valve 11 is a TG120S series axial flow type pressure regulating valve, which has excellent performance, stable operation, long maintenance cycle, convenient maintenance, and few spare parts. Both the first and second delivery pipelines are equipped with several connecting pipes and necked butt-weld flanges to connect the valves, or the valves to the connecting pipes, ensuring tight seals when the pipelines are connected. If the working pressure regulating valve fails, it will be in the current or fully open position. If the monitoring pressure regulating valve fails, the valve port will be closed. This fully ensures the safe and stable operation of downstream equipment.

[0026] In this embodiment, the input end of the forged steel ball valve 7 is connected to a third butt-weld flange 6, to which a backup pipeline is connected. This backup pipeline comprises a quick connector 25 and a fourth butt-weld flange 23. A low-temperature cast steel ball valve 24 is connected to the fourth butt-weld flange 23, which is then connected to the quick-release mechanism. The backup pipelines are located near the intake manifold, further enhancing the safety of the device.

[0027] In this embodiment, a transition pipe 12 is connected between the electric regulating valve 11 and the second forged steel ball valve 13. A vent pipe is connected between the transition pipe 12 of the first delivery pipeline and the transition pipe 12 of the second delivery pipeline. The vent pipe includes two symmetrically arranged fifth-neck butt-weld flanges 19. The fifth-neck butt-weld flanges 19 are sequentially provided with a third forged steel ball valve 20 and a throttle stop vent valve 21. The upper portions of the two throttle stop vent valves 21 are connected to a transversely arranged connecting pipe 22, with a vent port provided at the end of the connecting pipe 22. The vent pipe can discharge gas, preventing the problem of gas occupying pipeline space and generating resistance, which affects pipeline flow rate, thereby improving pipeline transportation efficiency.

[0028] In this embodiment, the skid 26 includes a bottom support frame, connected to which are vertical support columns 27 corresponding to the inlet and outlet pipes, the first and second transport pipelines, respectively. A clamp 30 is attached to the top of each vertical support column 27. The vertical support columns 27, in conjunction with the bottom support frame, adjust the height of the entire transport pipeline, improving its adaptability. The clamp 30 can be either a double-ended or single-ended clamp. Connected to the top of each clamp is a connecting plate 29, which is equipped with a bottom plate 28 that connects to the vertical support columns 27. The clamp 30 is positioned according to actual conditions to ensure a stable installation of the transport pipeline on the skid 26.

[0029] Specifically, the two delivery pipelines of this device are a safety monitoring pressure regulating system (pressure regulating train) composed of a safety shut-off valve, a monitoring pressure regulating valve, and a working pressure regulating valve connected in series in order from upstream to downstream. The safety shut-off valve, the monitoring pressure regulating valve, and the working pressure regulating valve should be independent devices. Under normal circumstances, the safety shut-off valve and the monitoring pressure regulating valve are in the fully open position, and the working pressure regulating valve controls the downstream pressure. When the controller receives a signal from the station control system and the gas supply flow exceeds the set value, the controller and the working pressure regulating valve switch to the flow control state. At this time, the controller output controls the distribution flow. When the working pressure regulating valve fails and cannot control the downstream pressure, the monitoring pressure regulating valve starts to work to maintain a safe range downstream. If the monitoring pressure regulating valve also fails and cannot control the downstream pressure, the safety shut-off valve automatically cuts off the gas source, and at the same time, the full-screen controller B opens the backup circuit to ensure the safety of the downstream pipeline and equipment.

[0030] The other structures are the same as those in Example 1.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A throttling and pressure regulating device, characterized in that: The air inlet pipe group and the air outlet pipe group are symmetrically arranged. The air inlet pipe group is provided with two air outlets. The air outlet pipe group is provided with two air inlets corresponding to the air outlets of the air inlet pipe group. A symmetrically arranged first delivery pipeline and a second delivery pipeline are connected between the air outlets of the air inlet pipe group and the air inlet of the air outlet pipe group. The air inlet pipe group, the air outlet pipe group, the first delivery pipeline and the second delivery pipeline are all connected to the bottom skid (26).

2. The throttling and pressure regulating device according to claim 1, characterized in that: The air inlet pipe group comprises a first equal-diameter tee (2), an air inlet of the first equal-diameter tee (2) is connected to a first neck-welded flange (1), an air outlet of the first equal-diameter tee (2) is connected to a first seamless elbow (5), and another air outlet of the first equal-diameter tee (2) is connected to a first connecting pipe (3) and a second seamless elbow (4).

3. The throttling and pressure regulating device according to claim 2, characterized in that: The outlet pipe group includes a second equal-diameter tee (15), the air inlet of the second equal-diameter tee (15) is connected to a second neck-welded flange (16), one air outlet of the second equal-diameter tee (15) is connected to a third seamless elbow (14), and the other air outlet of the second equal-diameter tee (15) is connected to a second connecting pipe (17) and a fourth seamless elbow (18).

4. The throttling and pressure regulating device according to any one of claims 1 to 3, characterized in that: The first delivery pipeline and the second delivery pipeline both include a forged steel ball valve (7), a self-operated safety shut-off valve (8), a self-operated regulating valve (10), an electric regulating valve (11) and a forged steel ball valve (13) which are arranged in sequence. The forged steel ball valve (7) is connected to the air inlet pipe group. A pressure gauge (9) is provided between the self-operated regulating valve (10), the self-operated safety shut-off valve (8) and the electric regulating valve (11). A pressure transmitter is provided between the electric regulating valve (11) and the forged steel ball valve (13). The forged steel ball valve (13) is connected to the air outlet pipe group.

5. The throttling and pressure regulating device according to claim 4, characterized in that: The input end of the forged steel ball valve (7) is connected to a third necked butt-welding flange (6), and a spare pipeline is connected to the third necked butt-welding flange (6).

6. The throttling and pressure regulating device according to claim 5, characterized in that: The spare pipeline includes a quick connector (25) and a fourth neck butt-welding flange (23). The fourth neck butt-welding flange (23) is connected to a low-temperature cast steel ball valve (24), and the low-temperature cast steel ball valve (24) is connected to the quick structure.

7. The throttling and pressure regulating device according to claim 5 or 6, characterized in that: A transition pipe (12) is connected between the electric regulating valve (11) and the second forged steel ball valve (13), and a vent pipe is connected between the transition pipe (12) of the first delivery pipeline and the transition pipe (12) of the second delivery pipeline.

8. The throttling and pressure regulating device according to claim 7, characterized in that: The vent pipeline comprises two symmetrically arranged fifth neck butt-welded flanges (19), on which a forged steel ball valve (20) and a throttle stop vent valve (21) are sequentially arranged, and the upper parts of the two throttle stop vent valves (21) are connected to a transversely arranged connecting pipeline (22), and a vent port is provided at the end of the connecting pipeline (22).

9. The throttling and pressure regulating device according to claim 5, 6 or 8, characterized in that: The bottom skid (26) comprises a bottom support frame, to which are connected vertical support columns (27) respectively matched with the air inlet pipe group, the air outlet pipe group, the first delivery pipeline, and the second delivery pipeline, and a clamp (30) is connected to the top of the vertical support column (27).

10. The throttling and pressure regulating device according to claim 9, characterized in that: The hoop (30) comprises a double-head hoop or a single-head hoop, and a connecting plate (29) is connected to the upper portion of the double-head hoop or the single-head hoop, and a bottom plate (28) connected to the vertical support column (27) is provided on the connecting plate (29).

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