CN210128250U - High-stability shared pressure regulating device for multiple air sources - Google Patents

Abstract

The utility model relates to a multiple air supply of high stability pressure regulating device that shares, including heat transfer mechanism and pressure regulating mechanism, pressure regulating mechanism includes the LNG unit, the middling pressure unit, high-pressure unit and stand-by unit, heat transfer mechanism communicates respectively has the LNG pipeline, middling pressure pipeline and high-pressure line, stand-by unit includes reserve second grade regulator group, the intercommunication has first bypass pipe on the LNG pipeline, the intercommunication has the second bypass pipe on the middling pressure pipeline, the intercommunication has the third bypass pipe on the high-pressure line, first bypass pipe, second bypass pipe and third bypass pipe tail end intercommunication have stand-by line simultaneously, the intercommunication has reserve second grade regulator group in the stand-by line, this setting makes when the voltage regulator goes wrong wherein all the way, can carry out the pressure regulating to low reaches through reserve second grade regulator group and use the gas point, guarantee that low reaches use gas is incessant.

Description

High-stability shared pressure regulating device for multiple air sources

Technical Field

The utility model relates to a natural gas pressure regulating equipment field especially relates to a multiple air supply sharing regulator of high stability.

Background

The LNG (liquefied natural gas) has the main component of methane, is known as the cleanest energy on the earth, is colorless, tasteless, nontoxic and noncorrosive, has the volume of about 1/600 of the volume of the same amount of gaseous natural gas, has the weight of about 45 percent of the same volume of water, is prepared by purifying natural gas produced in a gas field, is liquefied at a series of ultralow temperatures, and is transported by a liquefied natural gas ship, so that air is hardly polluted after combustion, and the heat emission is large, so that the liquefied natural gas is one of the well-recognized energy sources. CNG (compressed natural gas), which is a natural gas pressurized and stored in a container in a gaseous state, has the characteristics of low cost, high efficiency, no pollution, safe and convenient use, etc., is increasingly showing a strong development potential, is mainly applied to urban gas industry, particularly to fuel for residents' life, and the demand of most cities for natural gas is obviously increased along with the improvement of the living standard of people and the enhancement of environmental awareness. When multiple air sources supply air for downstream users in the pressure regulating system at the same time, and one of the pressure regulators fails or is annual detected, the whole pressure regulating system needs to be stopped to work to guarantee maintenance, so that the downstream air supply is not continuous, and the normal use of the users is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome exist among the prior art not enough, provide a multiple air supply of high stability regulator that shares.

The utility model discloses a realize through following technical scheme:

the high-stability pressure regulating device shared by multiple air sources is characterized by comprising a heat exchange mechanism and a pressure regulating mechanism, wherein the pressure regulating mechanism comprises an LNG unit, a medium-pressure unit, a high-pressure unit and a standby unit, the heat exchange mechanism is respectively communicated with an LNG pipeline, a medium-pressure pipeline and a high-pressure pipeline, the LNG pipeline is communicated with the LNG unit, the medium-pressure pipeline is communicated with the medium-pressure unit, the high-pressure pipeline is communicated with the high-pressure unit, the tail ends of the LNG pipeline, the medium-pressure pipeline and the high-pressure pipeline are simultaneously communicated with a through pipeline, the standby unit comprises a standby secondary pressure regulator group, the LNG pipeline is communicated with a first bypass pipe, a first valve is arranged on the first bypass pipe, the medium-pressure pipeline is communicated with a second bypass pipe, a second valve is arranged on the second bypass pipe, a third bypass pipe is communicated with the high-pressure pipeline, and a third valve is arranged on the, the tail ends of the first bypass pipe, the second bypass pipe and the third bypass pipe are simultaneously communicated with a standby pipeline, a standby secondary pressure regulator group is communicated in the standby pipeline, and the tail end of the standby pipeline is communicated with a through pipeline.

According to the technical scheme, preferably, the device further comprises a metering mechanism, the metering mechanism comprises an LNG flow meter group, a medium-pressure flow meter group and a high-pressure flow meter group, the through pipeline is respectively communicated with a first branch pipeline, a second branch pipeline and a third branch pipeline, the LNG flow meter group is communicated with the first branch pipeline, the medium-pressure flow meter group is communicated with the second branch pipeline, and the high-pressure flow meter group is communicated with the third branch pipeline.

According to the above technical scheme, preferably, the first branch pipeline is communicated with a fourth bypass pipe, the fourth bypass pipe is provided with a fourth valve, the second branch pipeline is communicated with a fifth bypass pipe, the fifth bypass pipe is provided with a fifth valve, the third branch pipeline is communicated with a sixth bypass pipe, the sixth bypass pipe is provided with a sixth valve, the tail end of the fourth bypass pipe is communicated with the sixth bypass pipe, and the tail end of the fifth bypass pipe is communicated with the sixth bypass pipe.

The utility model has the advantages that:

when the LNG regulator group breaks down, open first valve, then the reserve second grade regulator group of LNG accessible carries out the pressure regulating, when the middle-pressure second grade regulator group breaks down, opens the second valve, then the reserve second grade regulator group of middling pressure CNG accessible carries out the pressure regulating, when the high-pressure second grade regulator group breaks down, opens the third valve, then the reserve second grade regulator group of high-pressure CNG accessible carries out the pressure regulating. When one of them voltage regulator goes wrong, this setting can carry out the pressure regulating to low reaches through reserve second grade voltage regulator group and use the gas point, guarantees that low reaches are used gas and is lastingly incessant, ensures user's normal use.

Drawings

Fig. 1 is a schematic view of the connection of the pipelines of the present invention.

In the figure: 1. an LNG pipeline; 2. a first valve; 3. a second valve; 4. a third valve; 5. a high pressure line; 6. a standby pipeline; 7. a medium pressure pipeline; 8. an LNG pressure regulator bank; 9. a medium-voltage two-stage regulator set; 10. a standby secondary voltage regulator set; 11. a high-voltage secondary voltage regulator set; 12. a pipeline is communicated; 13. a first branch line; 14. a second branch line; 15. a fourth valve; 16. a fifth valve; 17. a third branch line; 18. a sixth valve; 19. a medium voltage flow meter group; 20. a high-pressure flow meter group; 21. LNG flow meter group.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.

As shown in the figure, the utility model comprises a heat exchange mechanism and a pressure regulating mechanism, wherein the pressure regulating mechanism comprises an LNG unit, a medium-pressure unit, a high-pressure unit and a standby unit, the LNG unit comprises an LNG pressure regulator group 8 in the present example, the medium-pressure unit comprises a medium-pressure first-stage pressure regulator group and a medium-pressure second-stage pressure regulator group 9, the high-pressure unit comprises a high-pressure first-stage pressure regulator group and a high-pressure second-stage pressure regulator group 11, the heat exchange mechanism comprises a combined heat exchanger and a high-pressure heat exchanger in the present example, the combined heat exchanger comprises an LNG heat exchange pipe and a medium-pressure heat exchange pipe, the tail end of the LNG heat exchange pipe is communicated with an LNG pipeline 1, the tail end of the medium-pressure heat exchange pipe is communicated with a medium-pressure pipeline 7, the high-pressure heat exchanger comprises a first, the other end of the secondary heat exchange tube is communicated with a high-pressure secondary pressure regulator group 11 through a high-pressure pipeline 5, the heat exchange mechanism is respectively communicated with an LNG pipeline 1, a medium-pressure pipeline 7 and a high-pressure pipeline 5, an LNG unit is communicated in the LNG pipeline 1, a medium-pressure unit is communicated in the medium-pressure pipeline 7, a high-pressure unit is communicated in the high-pressure pipeline 5, the tail ends of the LNG pipeline 1, the medium-pressure pipeline 7 and the high-pressure pipeline 5 are simultaneously communicated with a through pipeline 12, the standby unit comprises a standby secondary pressure regulator group 10, a first bypass pipe is communicated with the LNG pipeline 1 between the LNG heat exchange tube and the LNG pressure regulator group 8, a first valve 2 is arranged on the first bypass pipe, a second bypass pipe is communicated with the medium-pressure pipeline 7 between the medium-pressure primary pressure regulator group and the medium-pressure secondary pressure regulator group 9, a second valve 3 is arranged on the second bypass pipe, and a third bypass pipe is communicated with the high-, be equipped with third valve 4 on the third bypass pipe, first bypass pipe, second bypass pipe and third bypass pipe tail end communicate simultaneously has reserve pipeline 6, the intercommunication has reserve second grade regulator group 10 in the reserve pipeline 6, 6 tail ends of reserve pipeline and the intercommunication that link up pipeline 12. When the LNG regulator group 8 breaks down, open first valve 2, then the reserve second grade regulator group of LNG accessible 10 carries out the pressure regulating, when the middle-pressure second grade regulator group 9 breaks down, opens second valve 3, then the reserve second grade regulator group of middle-pressure CNG accessible 10 carries out the pressure regulating, when the high-pressure second grade regulator group 11 breaks down, opens third valve 4, then the reserve second grade regulator group of high-pressure CNG accessible 10 carries out the pressure regulating. When one of them voltage regulator goes wrong, this setting can carry out the pressure regulating to low reaches through reserve second grade regulator group 10 and use the gas point, guarantees that low reaches are used gas and is lastingly incessant, ensures user's normal use.

According to the technical scheme, preferably, still include metering mechanism, metering mechanism includes LNG flowmeter group 21, medium-pressure flowmeter group 19 and high-pressure flowmeter group 20, link up pipeline 12 and communicate respectively first branch pipeline 13, second branch pipeline 14 and third branch pipeline 17, the intercommunication has LNG flowmeter group 21 in the first branch pipeline 13, second branch pipeline 14 intercommunication has medium-pressure flowmeter group 19, third branch pipeline 17 intercommunication has high-pressure flowmeter group 20, first branch pipeline 13, second branch pipeline 14 and third branch pipeline 17 tail end are parallelly connected simultaneously and are communicated with the low reaches pipeline, supply low reaches to use the gas point gas, connect metering mechanism behind pressure regulating mechanism, when three kinds of air supplies gas simultaneously, can the pressure regulating measurement respectively, be convenient for to charge the control in the user use of low reaches.

According to the above technical solution, preferably, the first branch pipeline 13 is communicated with a fourth bypass pipe, the fourth bypass pipe is provided with a fourth valve 15, the second branch pipeline 14 is communicated with a fifth bypass pipe, the fifth bypass pipe is provided with a fifth valve 16, the third branch pipeline 17 is communicated with a sixth bypass pipe, the sixth bypass pipe is provided with a sixth valve 18, the tail end of the fourth bypass pipe is communicated with the sixth bypass pipe, the tail end of the fifth bypass pipe is communicated with the sixth bypass pipe, when the flow meter fails or is detected annually, the corresponding valve is opened, the flow meter on the other branch pipeline can be used for metering, thereby ensuring uninterrupted air supply for downstream users and ensuring use of the users.

When the LNG regulator group 8 breaks down, open first valve 2, then the reserve second grade regulator group of LNG accessible 10 carries out the pressure regulating, when the middle-pressure second grade regulator group 9 breaks down, opens second valve 3, then the reserve second grade regulator group of middle-pressure CNG accessible 10 carries out the pressure regulating, when the high-pressure second grade regulator group 11 breaks down, opens third valve 4, then the reserve second grade regulator group of high-pressure CNG accessible 10 carries out the pressure regulating. When one of them voltage regulator goes wrong, this setting can carry out the pressure regulating to low reaches through reserve second grade regulator group 10 and use the gas point, guarantees that low reaches are used gas and is lastingly incessant, ensures user's normal use.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (3)

1. The high-stability pressure regulating device shared by multiple air sources is characterized by comprising a heat exchange mechanism and a pressure regulating mechanism, wherein the pressure regulating mechanism comprises an LNG unit, a medium-pressure unit, a high-pressure unit and a standby unit, the heat exchange mechanism is respectively communicated with an LNG pipeline, a medium-pressure pipeline and a high-pressure pipeline, the LNG pipeline is communicated with the LNG unit, the medium-pressure pipeline is communicated with the medium-pressure unit, the high-pressure pipeline is communicated with the high-pressure unit, the tail ends of the LNG pipeline, the medium-pressure pipeline and the high-pressure pipeline are simultaneously communicated with a through pipeline, the standby unit comprises a standby secondary pressure regulator group, the LNG pipeline is communicated with a first bypass pipe, a first valve is arranged on the first bypass pipe, the medium-pressure pipeline is communicated with a second bypass pipe, a second valve is arranged on the second bypass pipe, a third bypass pipe is communicated with the high-pressure pipeline, and a third valve is arranged on the, the tail ends of the first bypass pipe, the second bypass pipe and the third bypass pipe are simultaneously communicated with a standby pipeline, a standby secondary pressure regulator group is communicated in the standby pipeline, and the tail end of the standby pipeline is communicated with a through pipeline.

2. The high-stability pressure regulating device shared by multiple gas sources is characterized by further comprising a metering mechanism, wherein the metering mechanism comprises an LNG flow meter group, a medium-pressure flow meter group and a high-pressure flow meter group, the through pipeline is respectively communicated with a first branch pipeline, a second branch pipeline and a third branch pipeline, the LNG flow meter group is communicated with the first branch pipeline, the medium-pressure flow meter group is communicated with the second branch pipeline, and the high-pressure flow meter group is communicated with the third branch pipeline.

3. The high-stability pressure regulating device shared by multiple gas sources is characterized in that a fourth bypass pipe is communicated with the first branch pipeline, a fourth valve is arranged on the fourth bypass pipe, a fifth bypass pipe is communicated with the second branch pipeline, a fifth valve is arranged on the fifth bypass pipe, a sixth bypass pipe is communicated with the third branch pipeline, a sixth valve is arranged on the sixth bypass pipe, the tail end of the fourth bypass pipe is communicated with the sixth bypass pipe, and the tail end of the fifth bypass pipe is communicated with the sixth bypass pipe.

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