CN113741559A - Gas flow pressure regulating device - Google Patents
Gas flow pressure regulating device Download PDFInfo
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- CN113741559A CN113741559A CN202110953325.1A CN202110953325A CN113741559A CN 113741559 A CN113741559 A CN 113741559A CN 202110953325 A CN202110953325 A CN 202110953325A CN 113741559 A CN113741559 A CN 113741559A
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- regulating valve
- pressure regulating
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a gas flow pressure regulating device, which comprises a first module and a second module, wherein the first module comprises a first main pipeline, two first collecting pipes and a plurality of first branch pipelines, the plurality of first branch pipelines are parallel to the first main pipeline, a main flow regulating valve and a one-way valve are arranged on the first main pipeline, and a secondary flow regulating valve and a one-way valve are arranged on the first branch pipelines; the second module comprises a second main pipeline, two second collecting pipes and a plurality of second branch pipelines, the plurality of second branch pipelines are parallel to the second main pipeline, a main pressure regulating valve is arranged on the second main pipeline, and a secondary pressure regulating valve is arranged on the second branch pipelines; the air inlet of the air using device is communicated with the first main pipeline of the first module, and the air outlet of the air using device is communicated with the second main pipeline of the second module. Compared with the prior art, the invention has the advantages of realizing stepped precise regulation of flow and pressure, expanding the flow/pressure range, ensuring each regulating valve to be in the best control opening degree and the like.
Description
Technical Field
The invention relates to the field of industrial equipment production, in particular to a gas flow pressure regulating device.
Background
The accurate control of gas flow and pressure has extensive demand in fields such as fuel cell, hydrogen, natural gas, air compressor machine, chemical industry, energy-conservation, environmental protection, has the valve of multiform and can realize gas flow and pressure control to satisfy general industrial field demand. However, in the fields of fuel cells, aerospace and the like, due to the fact that the working conditions are complex, the gas flow and working pressure change ranges are wide, and conventional mass flow controllers and pressure regulating valves have applicable range ranges, and the requirement for high-precision control in wide flow and pressure regulating ranges is difficult to meet. For example: the control range ratio of a gas mass flow controller is generally 1: 100, respectively; the regulating valve is selected according to the Kv value of the valve, the opening regulating range of the valve is 10-90%, the optimal control effect is in the range of 20-90% opening, the optimal range is exceeded, and the control precision is greatly reduced. Therefore, the market needs a device suitable for large flow and pressure range working conditions and high-precision control so as to meet the requirements of special flow and pressure control of fuel cells, air compressors and the like.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned deficiencies of the prior art and providing a gas flow pressure regulating device.
The purpose of the invention can be realized by the following technical scheme:
a gas flow pressure regulating device comprising a first module and a second module, wherein:
the first module comprises a first main pipeline, two first collecting pipes and a plurality of first branch pipelines, the two first collecting pipes are vertically communicated with the first main pipeline, two ends of the plurality of first branch pipelines are respectively communicated with the two first collecting pipes and are parallel to the first main pipeline, a main flow regulating valve and a one-way valve are arranged on the first main pipeline, and a secondary flow regulating valve and a one-way valve are arranged on the first branch pipeline;
the second module comprises a second main pipeline, two second collecting pipes and a plurality of second branch pipelines, the two second collecting pipes are vertically communicated with the second main pipeline, two ends of the plurality of second branch pipelines are respectively communicated with the two second collecting pipes and are parallel to the second main pipeline, a main pressure regulating valve is arranged on the second main pipeline, and a secondary pressure regulating valve is arranged on the second branch pipeline;
the air inlet of the air using device is communicated with the first main pipeline of the first module, and the air outlet of the air using device is communicated with the second main pipeline of the second module.
Furthermore, the maximum controllable flow of the main flow regulating valve is 2-3 times of that of the secondary flow regulating valve.
Furthermore, the kv value of the main pressure regulating valve is 5-8 times of that of the secondary pressure regulating valve.
Further, the pipe diameter of the first main pipeline is 2 times that of the first branch pipeline.
Further, the pipe diameter of the second main pipeline is 3 times that of the second branch pipeline.
Further, the two first collecting pipes and the first main pipeline have the same pipe diameter; and the pipe diameters of the two second collecting pipes and the second main pipeline are the same.
Furthermore, a first pressure sensor is arranged at the air outlet of the first main pipeline, and a second pressure sensor is arranged at the air inlet of the second main pipeline.
Further, the air inlet end of the first main pipeline is connected with a pressure reducing valve.
Further, the device also comprises a control module which is used for connecting the main flow regulating valve, the secondary flow regulating valve, the main pressure regulating valve and the secondary pressure regulating valve.
Further, the number of the first branch pipelines is 2-6; the number of the second branch pipelines is 2-6.
Compared with the prior art, the invention has the following beneficial effects:
the invention designs two modules which are respectively arranged at the air inlet and the air outlet of the gas-using equipment, then each module adopts a mode that a main pipeline is connected with a plurality of branch pipelines in parallel, and the flow and the pressure can be accurately regulated in a stepped manner by arranging a flow regulating valve and a pressure regulating valve on the pipelines; meanwhile, the invention expands the flow/pressure range by opening different numbers of first branch pipelines and second branch pipelines and arranging and combining, ensures that each regulating valve is in the optimum control opening degree, realizes high-precision control and meets the special control requirements in the fields of fuel cells, air compressors and the like.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Reference numerals: 1-a first module; 11-a first main line; 12-a first branch line; 13-a first manifold; 14-main flow regulating valve; 15-time flow regulating valve; 2-a second module; 21-a second main line; 22-a second branch line; 23-a second manifold; 24-a main pressure regulating valve; 25-secondary pressure regulating valve; 3-a one-way valve; 4-a first pressure sensor; 5-a second pressure sensor; 6-a control module.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the present embodiment provides a gas flow rate pressure regulating device, including a first module 1, a second module 2, and a control module 6, wherein:
the first module 1 comprises a first main pipe 11, two first manifolds 13 and a plurality of first branch pipes 12. The two ends of the first main pipeline 11 are respectively provided with an air inlet and an air outlet, and the two first collecting pipes 13 are respectively vertically communicated with the two ends of the first main pipeline 11 through a three-way pipe. Two ends of the first branch pipelines 12 are respectively communicated with the two first collecting pipes 13 and are parallel to the first main pipeline 11. The pipe diameter of the first main pipeline 11 is 2 times of that of the first branch pipeline 12; the two first collecting pipes 13 and the first main pipeline 11 have the same pipe diameter. The number of the first branch pipes 12 is generally 2-6, and preferably 4. A main flow regulating valve 14 and a one-way valve 3 are arranged on the first main pipeline 11, and a secondary flow regulating valve 15 and the one-way valve 3 are arranged on the first branch pipeline 12; the maximum controllable flow of the main flow regulating valve 14 is generally 2-3 times of that of the secondary flow regulating valve 15.
The second module 2 comprises a second main pipe 21, two second manifolds 23 and a plurality of second branch pipes 22. Two ends of the second main pipeline 21 are respectively provided with an air inlet and an air outlet, and the two second collecting pipes 23 are respectively vertically communicated with two ends of the second main pipeline 21 through three-way pipes. The two ends of the second branch pipes 22 are respectively communicated with the two second collecting pipes 23 and are parallel to the second main pipe 21. The pipe diameter of the second main pipeline 21 is 3 times that of the second branch pipeline 22; the two second collecting pipes 23 and the second main pipeline 21 have the same pipe diameter. The number of the second branch pipes 22 is generally 2-6, and preferably 4 in this embodiment. A main pressure regulating valve 24 is arranged on the second main pipeline 21, and a secondary pressure regulating valve 25 is arranged on the second branch pipeline 22; the kv value of the main pressure regulating valve 24 is 5-8 times of that of the secondary pressure regulating valve 25.
The control module 6 is a conventional computer system for connecting the primary flow control valve 14, the secondary flow control valve 15, the primary pressure control valve 24 and the secondary pressure control valve 25, and executing a preset software program to achieve precise regulation.
When in use, the air inlet of the air using equipment is communicated with the air outlet of the first main pipeline 11 of the first module 1; the air outlet of the air using device is communicated with the air inlet of the main pipeline of the second module 2. To ensure the operational stability, a pressure reducing valve is also connected to the intake end of first main line 11. A first pressure sensor 4 is arranged at an air outlet of the first main pipeline 11, a second pressure sensor 5 is arranged at an air inlet of the second main pipeline 21, and the first pressure sensor 4 and the second pressure sensor 5 are both connected with the control module 6. The control module 6 adjusts the opening degrees of the main flow regulating valve 14 and the main pressure regulating valve 24 according to the target flow rate and pressure of the gas in the main pipe, and adjusts the sub flow regulating valve 15 and the sub pressure regulating valve 25 of the branch pipe arranged in parallel with the main pipe according to the flow rate.
The working principle of the embodiment is as follows:
the main flow regulating valve 14 and the secondary flow regulating valve 15 have different flow ranges, and the flow ranges between the secondary flow regulating valves 15 can be the same or different; meanwhile, the main pressure regulating valve 24 and the secondary pressure regulating valve 25 have different pressure ranges, and the pressure ranges of the secondary flow regulating valves 15 can be the same or different; therefore, the range can be greatly expanded through different setting ratios, and the flow and the pressure of the gas can be adjusted in high precision according to requirements.
The control module 6 specifically includes an arithmetic unit and a controller. The first pressure sensor 4 collects the pressure of the air flow at the inlet of an application object, such as a fuel cell stack, and feeds the pressure back to the arithmetic unit; the second pressure sensor 5 collects the airflow pressure at the outlet of the application object and feeds the airflow pressure back to the arithmetic unit. Meanwhile, each flow regulating valve in the pipeline can be used for controlling the gas flow and feeding back the actual flow to the arithmetic unit. And the controller selects a flow regulating valve and a pressure regulating valve which meet the high-precision control requirement under the appropriate target flow according to the target value and the feedback data of the arithmetic unit, and performs selection and opening control on opening and closing. The flow regulating valve and the pressure regulating valve are preferably linear throttle valves, and the opening regulating range is in the optimal range. Under the working condition of small flow, high-precision pressure control is realized through the secondary regulating valve in the branch pipeline, under the working condition of large flow, the high-precision pressure control is realized through the quick regulation of the main regulating valve in the main pipeline, 80% -90% of target flow is realized, and the residual small flow realizes high-precision control through the secondary regulating valve in the branch pipeline, so that the flow and the pressure of finally output gas meet target requirements.
In the present embodiment, the air supply, humidification and pressure control of a certain humidification tank are exemplified as follows:
the gas equipment in the embodiment is a humidifying tank with a heating function. In the first module 1, a main flow regulating valve 14(MFC) in a first main pipeline 11 can control the maximum flow 5000SLPM, and the range ratio is 100: 1, 2 standard units of pipe diameter; the controllable maximum flow of the secondary flow regulating valve 15(MFC) in the branch pipeline is 2000SLPM, and the range ratio is 100: 1, 1 standard unit of pipe diameter. In the second module 2, the main pressure regulating valve 24 in the second main pipeline adopts a proportional regulating valve with a kv value of 40, and the diameter of a matched pipeline is 3 standard units; the secondary pressure regulating valve 25 in the branch pipeline adopts a proportional regulating valve with a kv value of 6.3, and the diameter of the matched pipeline is 1 standard unit.
The first main pipeline 11 is connected with an air source which is regulated to 6barg through a primary pressure reducing valve, and the opening degree of a main flow regulating valve 14 and the opening degree of a secondary flow regulating valve 15 are controlled by a control module 6 according to a set requirement; when both are fully open, a maximum controllable flow of (5000+2000 x n) SLPM may be achieved, where n is the number of first branch lines 12. And when only one of the sub flow rate adjustment valves 15 of the first branch pipe 12 is opened, the high-precision control of the minimum gas flow rate 2000SLPM is achieved below this flow rate control precision drop.
Deionized water is filled in the humidifying tank, and the passing gas can be humidified by heating and controlling the temperature. The second module 2 at the rear end thereof is used to control the humidification tank inlet/outlet pressure. According to the data acquisition of the first pressure sensor 4 and the second pressure sensor 5 and the measurement of an arithmetic unit, the opening and closing and the opening of the main pressure regulating valve 24 and the secondary pressure regulating valve 25 are regulated by the controller according to the actual inlet flow of the humidifying tank and the required control pressure, the pressure control range is 5 kPag-400 kPag, and the control precision is less than or equal to +/-2 kPa.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. Gas flow pressure regulating device, characterized by comprising a first module (1) and a second module (2), wherein:
the first module (1) comprises a first main pipeline (11), two first collecting pipes (13) and a plurality of first branch pipelines (12), wherein the two first collecting pipes (13) are vertically communicated with the first main pipeline (11), two ends of each of the plurality of first branch pipelines (12) are respectively communicated with the two first collecting pipes (13) and are parallel to the first main pipeline (11), a main flow regulating valve (14) and a one-way valve (3) are arranged on the first main pipeline (11), and a secondary flow regulating valve (15) and the one-way valve (3) are arranged on the first branch pipeline (12);
the second module (2) comprises a second main pipeline (21), two second collecting pipes (23) and a plurality of second branch pipelines (22), the two second collecting pipes (23) are vertically communicated with the second main pipeline (21), two ends of the plurality of second branch pipelines (22) are respectively communicated with the two second collecting pipes (23) and are parallel to the second main pipeline (21), a main pressure regulating valve (24) is arranged on the second main pipeline (21), and a secondary pressure regulating valve (25) is arranged on the second branch pipelines (22);
the air inlet of the air using device is communicated with a first main pipeline (11) of the first module (1), and the air outlet is communicated with a second main pipeline (21) of the second module (2).
2. A gas flow pressure regulating device according to claim 1, characterized in that the maximum controllable flow of the primary flow regulating valve (14) is 2-3 times that of the secondary flow regulating valve (15).
3. A gas flow pressure regulating device according to claim 1, characterized in that the kv value of the primary pressure regulating valve (24) is 5-8 times that of the secondary pressure regulating valve (25).
4. A gas flow pressure regulating device according to claim 1, characterized in that the first main conduit (11) has a pipe diameter 2 times larger than the pipe diameter of the first branch conduit (12).
5. A gas flow pressure regulating device according to claim 1, characterized in that the second main conduit (21) has a pipe diameter 3 times larger than that of the second branch conduit (22).
6. A gas flow pressure regulating device according to claim 1, characterized in that the two first manifolds (13) and the first main line (11) have the same pipe diameter; the two second collecting pipes (23) and the second main pipeline (21) have the same pipe diameter.
7. A gas flow pressure regulating device according to claim 1, characterized in that a first pressure sensor (4) is provided at the gas outlet of the first main line (11) and a second pressure sensor (5) is provided at the gas inlet of the second main line (21).
8. A gas flow pressure regulating device according to claim 1, characterized in that a pressure reducing valve is connected to the inlet end of the first main line (11).
9. A gas flow pressure regulating device according to claim 1, characterized by further comprising a control module (6) for connecting the primary flow regulating valve (14), the secondary flow regulating valve (15), the primary pressure regulating valve (24) and the secondary pressure regulating valve (25).
10. A gas flow pressure regulating device according to claim 1, wherein the number of said first branch lines (12) is 2-6; the number of the second branch pipelines (22) is 2-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110953325.1A CN113741559A (en) | 2021-08-19 | 2021-08-19 | Gas flow pressure regulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110953325.1A CN113741559A (en) | 2021-08-19 | 2021-08-19 | Gas flow pressure regulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113741559A true CN113741559A (en) | 2021-12-03 |
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ID=78731801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110953325.1A Pending CN113741559A (en) | 2021-08-19 | 2021-08-19 | Gas flow pressure regulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113741559A (en) |
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2021
- 2021-08-19 CN CN202110953325.1A patent/CN113741559A/en active Pending
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