A natural gas transmission pipeline with two-way gas mixing function

Abstract

The utility model discloses a natural gas transmission pipeline with a two-way gas mixing function, comprising: a first-phase first gas supply pipe, a first-phase second gas supply pipe, and a second-phase gas supply pipe, wherein one end of the first-phase first gas supply pipe is connected to a first valve assembly, one end of the first-phase first gas supply pipe away from the first valve assembly is connected to a second valve assembly, the second-phase gas supply pipe is located on one side of the first valve assembly and is connected to a third valve assembly, the first-phase second gas supply pipe is connected to the third valve assembly, and the first-phase first gas supply pipe and the second-phase gas supply pipe are both connected to a pressure reducer. The utility model has the following advantages: by optimizing the configuration of the two-way gas source, it can be ensured that the gas is not reversely supplied to the other pipeline during single-way gas supply, and the unique pressure reducing unit setting can ensure the stability of the pressure when the two-way gas sources are supplying gas at the same time, and the first-phase and second-phase natural gas interconnection design is cleverly adopted, and the two-way natural gas pipelines of the first phase are used to supply gas to the second phase, and the natural gas flow of the first phase pipeline is actively coordinated to be expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of gas supply in power plants, in particular to a natural gas transmission pipeline with a two-way gas mixing function. Background Art

[0002] At present, for power plants with natural gas access and transportation conditions, it is foresighted to consider the possibility of delay in the construction of DN500 gas supply dedicated pipelines. In order to improve the reliability and flexibility of gas use, it is urgent to adopt a unique design method for natural gas transportation to achieve both separate gas supply and dual-source mixed supply. Therefore, a natural gas transmission pipeline with a two-way gas mixing function is provided to solve the above problems. Utility Model Content

[0003] In order to solve the problems in the above background technology, the technical solution adopted by the utility model to solve the technical problems is: a natural gas transmission pipeline with a two-way gas mixing function, which includes: a first-phase first gas supply pipe, a second-phase gas supply pipe, and a second-phase gas supply pipe, one end of the first-phase first gas supply pipe is connected to a first valve assembly, the end of the first-phase first gas supply pipe away from the first valve assembly is connected to the second valve assembly, the second-phase gas supply pipe is located on one side of the first valve assembly and is connected to a third valve assembly, the first-phase second gas supply pipe is connected to the third valve assembly, and the first-phase first gas supply pipe and the second-phase gas supply pipe are both connected to a pressure reducer.

[0004] As a preferred technical solution of the utility model, one end of the second-phase air supply pipe is connected to a fourth valve assembly, and the fourth valve assembly is connected to the air inlet end of the air storage tank through a pipeline.

[0005] As a preferred technical solution of the utility model, the gas outlet end of the gas storage tank is connected to a gas collecting pipe through a pipeline, and the gas collecting pipe is connected to the gas inlet end of the pressure reducer.

[0006] As a preferred technical solution of the utility model, the air outlet of the pressure reducer is connected with a fifth valve assembly, and the fifth valve assembly and the second valve assembly are both connected with a heater through a pipeline.

[0007] As a preferred technical solution of the utility model, the second valve assembly and the fifth valve assembly are respectively connected to a medium-pressure discharge pipe and a low-pressure discharge pipe through one end of the heater.

[0008] As a preferred technical solution of the present utility model, the first valve assembly, the second valve assembly, the third valve assembly, the fourth valve assembly and the fifth valve assembly have the same structure, and the first valve assembly includes a throttle regulating valve, a check valve and a manual valve, and the throttle regulating valve, the check valve and the manual valve are connected in sequence.

[0009] The utility model has the following advantages: by optimizing the configuration of the dual-path gas source, it can ensure that the gas does not flow back to the other pipeline when the single-path gas is supplied, and the unique decompression unit setting can ensure the stability of the pressure when the dual-path gas sources supply gas at the same time;

[0010] Through the clever design of the natural gas interconnection between Phases 1 and 2, the two natural gas pipelines of Phase 1 are used to supply gas to Phase 2, and active coordination is made to expand the natural gas flow of the Phase 1 pipeline. The expanded natural gas flow can meet the gas demand for simultaneous power generation by the units. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the connection of the first phase first air supply pipe, the first phase second air supply pipe and the second phase air supply pipe of the preferred embodiment of the utility model.

[0012] Explanation of the reference numerals: 1. First air supply pipe of the first phase; 2. Second air supply pipe of the first phase; 3. Air supply pipe of the second phase; 4. First valve assembly; 5. Second valve assembly; 6. Third valve assembly; 8. Fourth valve assembly; 9. Air storage tank; 10. Air collecting pipe; 11. Pressure reducer; 12. Fifth valve assembly; 13. Heater; 14. Medium-pressure discharge pipe; 15. Low-pressure discharge pipe. DETAILED DESCRIPTION

[0013] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" 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 an indirect connection 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.

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Please refer to Figure 1The utility model is a natural gas transmission pipeline with a two-way gas mixing function, comprising: a first-phase first gas supply pipe 1, a first-phase second gas supply pipe 2, and a second-phase gas supply pipe 3. One end of the first-phase first gas supply pipe 1 is connected to a first valve assembly 4, and the end of the first-phase first gas supply pipe 1 away from the first valve assembly 4 is connected to a second valve assembly 5. The second-phase gas supply pipe 3 is located on one side of the first valve assembly 4 and is connected to a third valve assembly 6. The first-phase second gas supply pipe 2 is connected to the third valve assembly 6, and the first-phase first gas supply pipe 1 and the second-phase gas supply pipe 3 are both connected to a pressure reducer 11.

[0017] One end of the second-phase gas supply pipe 3 is connected to a fourth valve assembly 8, which is connected to the gas inlet end of a gas storage tank 9 through a pipeline, and the gas outlet end of the gas storage tank 9 is connected to a gas collecting pipe 10 through a pipeline, and the gas collecting pipe 10 is connected to the gas inlet end of a pressure reducer 11, and the gas outlet end of the pressure reducer 11 is connected to a fifth valve assembly 12, and the fifth valve assembly 12 and the second valve assembly 5 are both connected to a heater 13 through pipelines.

[0018] The second valve assembly 5 and the fifth valve assembly 12 are respectively connected to a medium-pressure discharge pipe 14 and a low-pressure discharge pipe 15 through one end of the heater 13. The first valve assembly 4, the second valve assembly 5, the third valve assembly 6, the fourth valve assembly 8, and the fifth valve assembly 12 have the same structure. The first valve assembly 4 includes a throttling regulating valve, a check valve, and a manual valve, which are connected in sequence.

[0019] Specifically, when the utility model is used, the first gas supply pipe 1 of the first phase passes through the first valve assembly 4 and the second valve assembly 5 and then passes through the heater 13. The gas of the second gas supply pipe 2 of the first phase and the gas supply pipe 3 of the second phase both flow to the fourth valve assembly 8 and the fifth valve assembly 12 through the third valve assembly 6. The gas passing through the fourth valve assembly 8 enters the gas storage tank 9 through the pipeline. Then the gas in the gas storage tank 9 enters the gas collecting pipe 10 through the pipeline. The gas entering the gas collecting pipe 10 enters the pressure reducer 11 through the pipeline. Then the gas after passing through the pressure reducer 11 passes through the fifth valve assembly 12 through the pipeline and is then transported to the heater 13. After being preheated by the heater 13, it is finally transported to the medium-pressure discharge pipe 14 and the low-pressure discharge pipe 15. It is designed with a two-way gas mixing function to flexibly dispatch the upstream gas. After the technical solution of the pressure regulating station is optimized, the system is more optimized and the space is more saved.

[0020] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

[0021] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A natural gas transmission pipeline with two-way gas mixing function, characterized in that: include: A first-phase first air supply pipe (1), a second-phase second air supply pipe (2), and a second-phase air supply pipe (3); one end of the first-phase first air supply pipe (1) is connected to a first valve assembly (4); one end of the first-phase first air supply pipe (1) away from the first valve assembly (4) is connected to a second valve assembly (5); the second-phase air supply pipe (3) is located on one side of the first valve assembly (4) and is connected to a third valve assembly (6); the first-phase second air supply pipe (2) is connected to the third valve assembly (6); and the first-phase first air supply pipe (1) and the second-phase air supply pipe (3) are both connected to a pressure reducer (11).

2. A natural gas transmission pipeline with two-way gas mixing function as claimed in claim 1, characterized in that: One end of the second-stage air supply pipe (3) is connected to a fourth valve assembly (8), and the fourth valve assembly (8) is connected to the air inlet end of the air storage tank (9) via a pipeline.

3. A natural gas transmission pipeline with two-way gas mixing function as claimed in claim 2, characterized in that: The gas outlet end of the gas storage tank (9) is connected to a gas collecting pipe (10) via a pipeline, and the gas collecting pipe (10) is connected to the gas inlet end of the pressure reducer (11).

4. A natural gas transmission pipeline with two-way gas mixing function as claimed in claim 3, characterized in that: The gas outlet end of the pressure reducer (11) is connected to a fifth valve assembly (12), and the fifth valve assembly (12) and the second valve assembly (5) are both connected to a heater (13) via a pipeline.

5. The natural gas transmission pipeline with two-way gas mixing function as claimed in claim 1, characterized in that: The second valve assembly (5) and the fifth valve assembly (12) are respectively connected to a medium-pressure discharge pipe (14) and a low-pressure discharge pipe (15) through one end of the heater (13).

6. A natural gas transmission pipeline with two-way gas mixing function as claimed in claim 1, characterized in that: The first valve assembly (4), the second valve assembly (5), the third valve assembly (6), the fourth valve assembly (8) and the fifth valve assembly (12) have the same structure. The first valve assembly (4) comprises a throttle regulating valve, a check valve and a manual valve. The throttle regulating valve, the check valve and the manual valve are connected in sequence.

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