Natural gas pressure regulating system

Abstract

The utility model belongs to the technical field of natural gas conveying, and relates to a natural gas pressure regulating system which comprises a gas collecting pipeline, an industrial pressure regulating branch and a civil pressure regulating branch. The gas collecting pipeline is communicated with a natural gas inlet pipeline; one end of the industrial pressure regulating branch is communicated with the gas collecting pipeline, the other end of the industrial pressure regulating branch is communicated with a natural gas inlet of the industrial park, and a first pressure regulating assembly is arranged on the industrial pressure regulating branch; one end of the civil pressure regulating branch is communicated with the gas gathering pipeline, the other end of the civil pressure regulating branch is communicated with the civil natural gas inlet, and a second pressure regulating assembly is arranged on the civil pressure regulating branch. According to the natural gas pressure regulating system, the natural gas pressure is regulated to the range required by an industrial park through the first pressure regulating assembly, the natural gas pressure is regulated to the range required by civil use through the second pressure regulating assembly, the requirements of industrial natural gas and civil natural gas are both considered, and the application range and flexibility of the natural gas pressure regulating system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas transportation technical field, concretely relates to a natural gas pressure regulating system. BACKGROUND

[0002] The natural gas pressure regulating system is the core link connecting the pipe network and the terminal gas equipment, and its role is to adjust the high-pressure natural gas in the pipe network to the safe pressure value meeting the needs of different scenes through multi-stage pressure reduction. According to the difference of application scenes, the industrial natural gas pressure is usually high, and needs to meet the production needs of large flow and high load, while the domestic natural gas pressure is usually low, which needs to ensure the stable combustion of household equipment such as cookers and needs to be able to monitor the pressure fluctuation in real time through automatic pressure regulating facilities, and automatically cut off the gas source when exceeding the limit, effectively preventing the risk of pipe rupture or leakage.

[0003] The prior art has certain research on the natural gas pressure regulating system, and the patent document with the application number 202320496091.7 discloses a natural gas pressure regulating and metering pry for industrial users, which comprises a natural gas inlet, a metering group, a pressure reducing group, a pressure increasing group and a natural gas outlet. The gas inlet end of the metering group is communicated with the natural gas inlet, and is used for metering the gas from the upstream pipeline, the pressure reducing group and the pressure increasing group are arranged in parallel, the gas outlet end of the metering group is communicated with the gas inlet end of the pressure reducing group and the pressure increasing group respectively, and the gas outlet end of the pressure reducing group and the pressure increasing group is communicated with the natural gas outlet.

[0004] Therefore, the pressure of the pipeline natural gas meets the actual gas demand of the small-flow industrial user, the operation and maintenance are simple, the investment is less, the operation is safe, and the use is convenient. However, the natural gas pressure regulating and metering pry is only optimized for the specific pressure range of industrial natural gas, and the needs of domestic natural gas for low pressure and stable gas supply are not considered, so it cannot be directly applied to the domestic field, and the application range is limited. UTILITY MODEL CONTENT

[0005] In order to solve the technical problems that the natural gas pressure regulating system in the background art cannot simultaneously consider the needs of industrial natural gas and domestic natural gas, and the application range is limited, the utility model provides a natural gas pressure regulating system.

[0006] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0007] The natural gas pressure regulating system comprises a gas collecting pipeline, an industrial pressure regulating branch and a civil pressure regulating branch; the gas collecting pipeline is communicated with a natural gas inlet pipeline; one end of the industrial pressure regulating branch is communicated with the gas collecting pipeline, the other end is communicated with a natural gas inlet of an industrial park, and a first pressure regulating component is arranged on the industrial pressure regulating branch to regulate the natural gas pressure to a required range of the industrial park; one end of the civil pressure regulating branch is communicated with the gas collecting pipeline, the other end is communicated with a civil natural gas inlet, and a second pressure regulating component is arranged on the civil pressure regulating branch to regulate the natural gas pressure to a required range of the civil use.

[0008] In a specific embodiment, the first pressure regulating component comprises a first adjusting member, the first adjusting member comprises a first ball valve, a first pressure regulator and a second ball valve; the first ball valve, the first pressure regulator and the second ball valve are sequentially arranged on the industrial pressure regulating branch along the natural gas flow direction, the first ball valve is used for controlling the natural gas inflow, the first pressure regulator is used for reducing the natural gas pressure, and the second ball valve is used for controlling the natural gas outflow.

[0009] In a specific embodiment, the first adjusting member further comprises a filter; the filter is arranged on the industrial pressure regulating branch and located between the first ball valve and the first pressure regulator, and the filter is used for removing impurities in the natural gas.

[0010] In a specific embodiment, the first adjusting member further comprises a flow meter; the flow meter is arranged on the industrial pressure regulating branch and located between the first pressure regulator and the second ball valve, and the flow meter is used for measuring the natural gas flow.

[0011] In a specific embodiment, the second pressure regulating component comprises a second adjusting member and a second pressure regulator; the second adjusting member is arranged on the civil pressure regulating branch, and the structure of the second adjusting member is the same as that of the first adjusting member; the second pressure regulator is arranged on the civil pressure regulating branch, and the second pressure regulator is located between the first pressure regulator and the flow meter on the civil pressure regulating branch.

[0012] In a specific embodiment, the natural gas pressure regulating system further comprises a safety relief component, the safety relief component comprises a relief main pipe and a relief branch pipe; the relief main pipe is communicated with the gas collecting pipeline, and the industrial pressure regulating branch and the civil pressure regulating branch are both communicated with the relief main pipe, a third ball valve is arranged on the relief main pipe; a fourth ball valve and a safety relief valve are arranged on the relief branch pipe, the fourth ball valve and the safety relief valve are arranged in parallel with the third ball valve, the fourth ball valve is arranged close to the gas collecting pipeline, and the safety relief valve is arranged away from the gas collecting pipeline.

[0013] In a specific embodiment, a stop valve is further arranged on the relief main pipe; the third ball valve is located between the gas collecting pipeline and the stop valve.

[0014] In one specific implementation, the natural gas pressure regulating system further comprises a drainage assembly, the drainage assembly comprising a main drainage pipeline; one end of the main drainage pipeline being in communication with the gas collecting pipeline, and the other end being in communication with a waste water collection tank.

[0015] In one specific implementation, the drainage assembly further comprises a first drainage branch pipeline and a second drainage branch pipeline arranged side by side on the main drainage pipeline; the first drainage branch pipeline being in communication with the industrial pressure regulating branch; and the second drainage branch pipeline being in communication with the civil pressure regulating branch.

[0016] In one specific implementation, the natural gas inlet pipeline is provided with a fifth ball valve and a sixth ball valve in sequence along the flow direction of the natural gas.

[0017] In summary, the natural gas pressure regulating system has the following beneficial technical effects:

[0018] 1. The natural gas pressure regulating system of the present application is provided with an industrial pressure regulating branch and a civil pressure regulating branch arranged side by side on the gas collecting pipeline, the first pressure regulating assembly on the industrial pressure regulating branch is used to adjust the natural gas pressure to the required range for the industrial park, and the second pressure regulating assembly on the civil pressure regulating branch is used to adjust the natural gas pressure to the required range for civil use, so that the requirements for industrial and civil natural gas are met, and the application range and flexibility of the natural gas pressure regulating system are improved.

[0019] 2. The natural gas pressure regulating system of the present application controls the inflow of natural gas through the first ball valve, removes impurities in the natural gas through the filter, accurately reduces the natural gas pressure to the required range through the first-stage pressure regulator, measures the natural gas flow through the flow meter, and controls the outflow of natural gas through the second ball valve; the first ball valve, the filter, the first-stage pressure regulator, the flow meter and the second ball valve cooperate with each other to ensure efficient, stable and safe natural gas pressure regulating process, and improve the reliability and operation efficiency of the natural gas pressure regulating system.

[0020] 3. The natural gas pressure regulating system of the present application is provided with the third ball valve, the fourth ball valve and the safety relief valve, which cooperate with each other to facilitate rapid opening in case of emergency such as overpressure in the natural gas pressure regulating system, safely discharge the excess gas into the atmosphere, and protect the natural gas pressure regulating system from damage. In addition, the stop valve is provided to provide additional safety protection, isolate the discharge main during maintenance or repair of the natural gas pressure regulating system, and improve the safety of the natural gas pressure regulating system.

[0021] 4. The natural gas pressure regulating system of the present application is provided with the drainage assembly, which comprises the main drainage pipeline, the first drainage branch pipeline and the second drainage branch pipeline, so that the accumulated water in the gas collecting pipeline, the industrial pressure regulating branch and the civil pressure regulating branch is discharged in time, and the stability of the natural gas pressure regulating system during long-term operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the overall structure schematic diagram of the natural gas pressure regulating system.

[0023] The specific embodiments of the present application will be further explained with reference to the accompanying drawings, but the present application is not limited to the following embodiments. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be further explained and described below in combination with the accompanying drawings and embodiments, but the present application is not limited to the following described embodiments.

[0025] The natural gas pressure regulating system provided by the present application aims to solve the technical problem that the natural gas pressure regulating system cannot simultaneously meet the needs of industrial natural gas and domestic natural gas and has limited application range. By setting the natural gas inlet pipeline 1, the gas gathering pipeline 2, the industrial pressure regulating branch 3 and the domestic pressure regulating branch 4, accurate regulation of natural gas pressure is realized, and the needs of industrial natural gas and domestic natural gas are met.

[0026] Referring to Figure 1 A natural gas pressure regulating system comprises a natural gas inlet pipeline 1, a gas gathering pipeline 2, an industrial pressure regulating branch 3 and a domestic pressure regulating branch 4. The natural gas inlet pipeline 1 is in communication with an external natural gas pipeline; the gas gathering pipeline 2 is in communication with the natural gas inlet pipeline 1; one end of the industrial pressure regulating branch 3 is in communication with the gas gathering pipeline 2, and the other end is in communication with a natural gas inlet of an industrial park, and a first pressure regulating assembly is arranged on the industrial pressure regulating branch 3 for regulating the natural gas pressure to the required range of the industrial park; one end of the domestic pressure regulating branch 4 is in communication with the gas gathering pipeline 2, and the other end is in communication with a domestic natural gas inlet, and a second pressure regulating assembly is arranged on the domestic pressure regulating branch 4 for regulating the natural gas pressure to the required range of domestic use.

[0027] Specifically, the fifth ball valve 20 and the sixth ball valve 21 are arranged in sequence on the natural gas inlet pipeline 1 along the flow direction of the natural gas, so as to facilitate the control of the flow state of the natural gas in the natural gas inlet pipeline 1.

[0028] More specifically, the number of industrial pressure regulating branch 3 and civil pressure regulating branch 4 is not specifically limited, and the required number of industrial pressure regulating branch 3 and civil pressure regulating branch 4 is set according to actual demand, and it is ensured that the industrial pressure regulating branch 3 and the civil pressure regulating branch 4 are arranged side by side on the gas gathering pipeline 2.

[0029] More specifically, the gas gathering pipeline 2 is provided with a reserved valve to adjust the natural gas flow state in the gas gathering pipeline 2, thereby facilitating the later maintenance requirements and ensuring the flexibility of the natural gas pressure regulating system.

[0030] Referring to Figure 1 , the first pressure regulating assembly includes a first adjusting member, which includes a first ball valve 5, a primary pressure regulator 6, a second ball valve 7, a filter 8, and a flow meter 9. The first ball valve 5, the primary pressure regulator 6, and the second ball valve 7 are arranged in sequence on the industrial pressure regulating branch 3 along the natural gas flow direction, the first ball valve 5 is used to control the inflow of natural gas, the primary pressure regulator 6 is used to reduce the pressure of natural gas, and the second ball valve 7 is used to control the outflow of natural gas. The filter 8 is arranged on the industrial pressure regulating branch 3 and located between the first ball valve 5 and the primary pressure regulator 6, and the filter 8 is used to remove impurities in the natural gas. The flow meter 9 is arranged on the industrial pressure regulating branch 3 and located between the primary pressure regulator 6 and the second ball valve 7, and the flow meter 9 is used to measure the flow of natural gas.

[0031] Referring to Figure 1 , the second pressure regulating assembly includes a second adjusting member and a secondary pressure regulator 10. The second adjusting member is arranged on the civil pressure regulating branch 4, and the structure of the second adjusting member is the same as that of the first adjusting member; the secondary pressure regulator 10 is arranged on the civil pressure regulating branch 4, and the secondary pressure regulator 10 is located between the primary pressure regulator 6 and the flow meter 9 on the civil pressure regulating branch 4.

[0032] Embodiment 2:

[0033] Referring to Figure 1 , the natural gas pressure regulating system of the present embodiment, based on embodiment 1, further comprises a safety relief assembly, the safety relief assembly comprises a relief main pipe 11 and a relief branch pipe 12. The relief main pipe 11 communicates with the gas gathering pipeline 2, and the industrial pressure regulating branch 3 and the civil pressure regulating branch 4 both communicate with the relief main pipe 11, the relief main pipe 11 is provided with a third ball valve 13 and a stop valve 16, and the third ball valve 13 is located between the gas gathering pipeline 2 and the stop valve 16.

[0034] The fourth ball valve 14 and the safety relief valve 15 are arranged on the discharge branch pipe 12, the fourth ball valve 14 and the safety relief valve 15 are arranged in parallel with the third ball valve 13 and the stop valve 16, the fourth ball valve 14 is arranged close to the gas gathering pipeline 2, and the safety relief valve 15 is arranged away from the gas gathering pipeline 2, so that the gas is automatically discharged when the pressure of the natural gas pressure regulating system exceeds the set value.

[0035] In the embodiment, the third ball valve 13, the fourth ball valve 14 and the safety relief valve 15 are matched with each other, so that the excess gas can be safely discharged into the atmosphere when the natural gas pressure regulating system encounters an emergency such as overpressure, and the natural gas pressure regulating system is protected from damage. In addition, the stop valve 16 is arranged, so that additional safety protection is provided, the discharge main pipe is isolated during maintenance or repair of the natural gas pressure regulating system, and the safety of the natural gas pressure regulating system is improved.

[0036] Embodiment 3:

[0037] With reference to Figure 1 , the natural gas pressure regulating system in the embodiment is based on the natural gas pressure regulating system in embodiment 1, and further comprises a drainage assembly, the drainage assembly comprises a main drainage pipeline 17, a first drainage branch pipe 18 and a second drainage branch pipe 19, the first drainage branch pipe 18 and the second drainage branch pipe 19 are arranged side by side on the main drainage pipeline 17; the first drainage branch pipe 18 is in communication with the industrial pressure regulating branch 3 and is used for draining water accumulated in the industrial pressure regulating branch 3; and the second drainage branch pipe 19 is in communication with the civil pressure regulating branch 4 and is used for draining water accumulated in the civil pressure regulating branch 4.

[0038] In the embodiment, the drainage assembly is arranged, so that the water accumulated in the gas gathering pipeline 2, the industrial pressure regulating branch 3 and the civil pressure regulating branch 4 is drained in time, and the stability of long-term operation of the natural gas pressure regulating system is improved.

[0039] The working principle of the natural gas pressure regulating system is as follows: natural gas enters the gas gathering pipeline 2 from a natural gas pipeline outside a station through the natural gas inlet pipeline 1, and the natural gas is branched to the industrial pressure regulating branch 3 or the civil pressure regulating branch 4 according to requirements.

[0040] On the industrial pressure regulating branch 3, the natural gas first flows in through the first ball valve 5; then, the natural gas removes impurities through the filter 8; then, the natural gas enters the primary pressure regulator 6 to reduce the pressure and is adjusted to the required range of the industrial park, and at the same time, the flow meter 9 measures the flow of the natural gas; finally, the natural gas flows out through the second ball valve 7 and enters the natural gas pipeline of the industrial park.

[0041] On the civil pressure regulating branch 4, the natural gas firstly flows into by the first ball valve 5; then, the natural gas removes impurities by the filter 8; then, the natural gas enters the first pressure regulator 6 and the second pressure regulator 10 to reduce pressure, adjusts to the required range of civil, simultaneously, the flow meter 9 measures the natural gas flow; finally, the natural gas flows out by the second ball valve 7, enters the civil natural gas pipeline.

[0042] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A natural gas pressure regulating system, comprising: The natural gas pressure regulating system comprises: a gas gathering pipeline (2) in communication with a natural gas inlet pipeline (1); an industrial pressure regulating branch (3) in communication with the gas gathering pipeline (2) at one end and a natural gas inlet of an industrial park at the other end, and provided with a first pressure regulating assembly for regulating the pressure of the natural gas to a required range for the industrial park; and a civil pressure regulating branch (4) in communication with the gas gathering pipeline (2) at one end and a civil natural gas inlet at the other end, and provided with a second pressure regulating assembly for regulating the pressure of the natural gas to a required range for civil use.

2. The natural gas pressure regulating system of claim 1, wherein: The first pressure regulating assembly comprises a first regulating member, which comprises a first ball valve (5), a primary pressure regulator (6) and a second ball valve (7); The first ball valve (5), the primary pressure regulator (6) and the second ball valve (7) are sequentially arranged on the industrial pressure regulating branch (3) in the flow direction of the natural gas, the first ball valve (5) is used for controlling the inflow of the natural gas, the primary pressure regulator (6) is used for reducing the pressure of the natural gas, and the second ball valve (7) is used for controlling the outflow of the natural gas.

3. The natural gas pressure regulating system of claim 2, wherein: The first regulating member further comprises a filter (8); The filter (8) is arranged on the industrial pressure regulating branch (3) and located between the first ball valve (5) and the primary pressure regulator (6), and is used for removing impurities in the natural gas.

4. The natural gas pressure regulating system of claim 3, wherein: The first regulating member further comprises a flow meter (9); The flow meter (9) is arranged on the industrial pressure regulating branch (3) and located between the primary pressure regulator (6) and the second ball valve (7), and is used for measuring the flow of the natural gas.

5. The natural gas pressure regulating system of claim 4, wherein: The second pressure regulating assembly comprises a second regulating member and a secondary pressure regulator (10); The second regulating member is arranged on the civil pressure regulating branch (4), and the structure of the second regulating member is the same as that of the first regulating member; The secondary pressure regulator (10) is arranged on the civil pressure regulating branch (4) and located between the primary pressure regulator (6) and the flow meter (9) on the civil pressure regulating branch (4).

6. The natural gas pressure regulating system of any one of claims 1 to 5, wherein: The natural gas pressure regulating system further comprises a safety relief assembly, which comprises a relief main pipe (11) and a relief branch pipe (12); The relief main pipe (11) is in communication with the gas gathering pipeline (2), and the industrial pressure regulating branch (3) and the civil pressure regulating branch (4) are both in communication with the relief main pipe (11), and the relief main pipe (11) is provided with a third ball valve (13); The relief branch pipe (12) is provided with a fourth ball valve (14) and a safety relief valve (15), the fourth ball valve (14) and the safety relief valve (15) are arranged in parallel with the third ball valve (13), the fourth ball valve (14) is arranged close to the gas gathering pipeline (2), and the safety relief valve (15) is arranged away from the gas gathering pipeline (2).

7. The natural gas pressure regulating system of claim 6, wherein: The relief main pipe (11) is further provided with a stop valve (16); The third ball valve (13) is located between the gas gathering pipeline (2) and the stop valve (16).

8. The natural gas pressure regulating system of claim 7, wherein: The natural gas pressure regulating system further comprises a drainage assembly, which comprises a main drainage pipeline (17); The main drainage pipeline (17) is communicated with the gas collecting pipeline (2) at one end and communicated with a waste water collecting pool at the other end.

9. The natural gas pressure regulating system of claim 8, wherein: The drainage assembly further comprises a first drainage branch pipeline (18) and a second drainage branch pipeline (19) arranged side by side on the main drainage pipeline (17). The first drainage branch pipeline (18) is communicated with the industrial pressure regulating branch (3). The second drainage branch pipeline (19) is communicated with the civil pressure regulating branch (4).

10. The natural gas pressure regulating system of claim 1, wherein: The fifth ball valve (20) and the sixth ball valve (21) are arranged on the natural gas inlet pipeline (1) in sequence along the flow direction of the natural gas.

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