CN212433647U - Wide-range high-precision gas pressure and flow quick adjusting device - Google Patents
Wide-range high-precision gas pressure and flow quick adjusting device Download PDFInfo
- Publication number
- CN212433647U CN212433647U CN202021930896.0U CN202021930896U CN212433647U CN 212433647 U CN212433647 U CN 212433647U CN 202021930896 U CN202021930896 U CN 202021930896U CN 212433647 U CN212433647 U CN 212433647U
- Authority
- CN
- China
- Prior art keywords
- flow
- pressure
- valve
- quick
- throttling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a gas flow adjusts technical field, specifically be a wide range high accuracy gas pressure and flow quick adjustment device, be difficult to satisfy the high pressure to current flow control device, it is quick, a wide range, the defect of high accuracy regulation is proposed, adjusting device includes the main governing valve, multichannel quick adjustment valve and feedback control system, the main governing valve is parallelly connected with multichannel quick adjustment valve, the main governing valve that sets up on the main line adjusts high-pressure gas flow's flow as required, the flow that sets up multichannel quick adjustment valve on the secondary line adjusts high-pressure gas flow fast and with high accuracy, feedback control system control main governing valve realizes the large-traffic control to high-pressure gas flow, the simultaneous control multichannel quick adjustment valve realizes the little flow to high-pressure gas flow, and is quick, accurate control. The utility model discloses be favorable to shortening the air supply consumption of whole flow calibration process, save the calibration cost, improve work efficiency.
Description
The technical field is as follows:
the utility model belongs to the technical field of gas flow adjusts, concretely relates to wide range high accuracy gas pressure and flow quick adjustment device.
Background art:
the accurate control of the gas flow has wide requirements in the fields of petroleum, natural gas, chemical industry, energy conservation, environmental protection, aerospace and the like, and valves in various forms can realize the gas flow control and meet the requirements of general industrial fields. However, in the field of flow meter measurement and calibration, the working condition range of the calibrated flow device is wide, and particularly, the flow rate of the calibrated flow device in the aerospace industry is increasingly large, and the flow rate is from several grams per second to several kilograms per second; the working pressure has wide variation range from negative pressure to positive pressure, resulting in more pressure variation working conditions. Thus, the need for calibration of the combined flow and pressure conditions is addressed. In order to meet the calibration requirements, a wide-range high-precision gas pressure and flow quick adjusting system suitable for the flow metering field is needed, and the required flow and pressure are provided for a flow calibration device so as to match the objective condition of wide variation range of the flow and pressure working conditions of the calibrated flow device. One difficulty of the system is that the flow needs to be accurately controlled in the whole measuring range, and the minimum flow regulation resolution can be within 0.5 g/s; another difficulty is how to make the calibrated flow device within such a wide range of flow and pressure operating ranges to ensure that the system can quickly adjust the flow and pressure, which means that a large number of high-pressure air sources can be saved, the calibration efficiency can be improved, and objective economic costs can be saved. The current pure independent valve type flow control device is difficult to simultaneously meet the requirements of the rapid adjustment of the gas flow under the working conditions of high pressure and large flow range and high precision. For example: the utility model provides a fluid flow control valve and utility model name are flow control valve, have announced the governing valve of the same type, and can both realize stable high accuracy flow control, nevertheless are limited in the aspect of flow control scope and control speed. Therefore, the utility model provides a be applicable to high pressure, large-traffic scope operating mode, high accuracy gas flow quick control device has the important function to some special pressure and flow control demands.
The invention content is as follows:
the utility model discloses a solve current flow control device and be difficult to satisfy high pressure, large-traffic scope operating mode, high accuracy gas flow, quick adjustment's defect, provide a wide range high accuracy gas pressure and flow quick adjustment device, through setting up different regulation pipeline, shorten the air supply consumption of whole flow calibration process, and then save the calibration cost, improve work efficiency.
The utility model discloses a technical scheme lie in: a wide range high precision gas pressure and flow quick adjustment device comprising:
the main regulating valve is arranged on the main pipeline and used for regulating the flow of the high-pressure airflow according to the requirement; the feedback control system is used for controlling the opening of the main regulating valve according to the flow target or the pressure target of the high-pressure airflow in the main pipeline, and also comprises a multi-channel quick regulating valve which is connected with the main regulating valve in parallel, wherein the multi-channel quick regulating valve is arranged on a secondary pipeline which is connected with the main pipeline in parallel and is used for regulating the flow of the high-pressure airflow; the multi-channel quick regulating valve comprises a plurality of throttling nozzles arranged in parallel and quick valves respectively connected with the throttling nozzles in series, and the feedback control system is used for controlling the opening and closing of each quick valve.
Preferably, the size of each throttling nozzle is different, the throat areas of the nozzles of different throttling nozzles are arranged according to a multiple relation, and the minimum throat area of the throttling nozzle is arranged according to the requirement of adjusting precision.
Preferably, the main regulating valve is a linear throttling valve which comprises a linear throttling head and a driving device used for driving the linear throttling head to move, and the feedback control system realizes the adjustment of the throttling area of the pipeline by the linear throttling head by controlling the driving device.
Preferably, the feedback control system comprises a controller, an arithmetic unit, a first sensor and a second sensor, wherein the first sensor is used for acquiring a total pressure value P01 and a total temperature value T01 of the high-pressure airflow at the inlet of the device and feeding back the total pressure value P01 and the total temperature value T01 to the arithmetic unit; the second sensor is used for acquiring a total pressure value P02 and a gas mass flow m3 of high-pressure air flow at the outlet of the device after the main pipeline and the secondary pipeline are adjusted and mixed, and feeding back the total pressure value P02 and the gas mass flow m3 to the arithmetic unit, and the controller controls the opening of the main adjusting valve and the opening and closing of the multi-channel quick adjusting valve according to feedback data of the arithmetic unit.
The utility model has the advantages that:
1. the utility model adopts a multi-channel parallel connection form, installs the linear throttle valve in the main pipeline, and utilizes the characteristics of larger size of the linear throttle valve, higher air flow pressure and larger flow range to realize the rapid adjustment of the large flow range of the main pipeline; simultaneously install multichannel quick adjustment valve on the secondary line parallelly connected with the main line, utilize the throttle nozzle to realize little flow, quick high accuracy pressure and flow stability and adjust, realize the high accuracy quick adjustment of flow and pressure in the overall process through main line and secondary line combination, this structure is favorable to shortening the air supply consumption of whole flow calibration process, saves the calibration cost, improves work efficiency.
2. The utility model discloses when carrying out large-traffic high accuracy rapid draing, feedback control system calculates the restriction area of wide-range in advance to carry out rapid draing by linear choke valve, realize the 80-90% of flow target, the surplus low discharge then realizes high accuracy rapid draing through the secondary line way quick adjustment valve that leads to the fact on the way, makes the gas flow of final output satisfy target flow value, and whole accommodation process cost time is few, and the regulation precision is high.
Description of the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
wherein: the device comprises a high-pressure air flow 1, a device inlet 2, a main pipeline 3, a main regulating valve 4, a linear throttling head 5, a driving device 6, a feedback control system 7, a controller 8, a calculator 9, a first sensor 10, a second sensor 11, a pipeline 12, a multi-channel quick regulating valve 13, a branch pipeline 14, a throttling nozzle 15, a quick valve 16, a device outlet 17 and a regulated air flow 18.
The specific implementation mode is as follows:
example 1
As shown in fig. 1 and 2, the utility model relates to a wide-range high-precision gas pressure and flow quick adjusting device, the high-pressure air current in the main pipeline 3 enters from the device inlet 2 of the adjusting device, and the adjusted air current 18 flows out from the device outlet 17.
The adjusting device comprises a main adjusting valve 4, a feedback control system 7 and a multi-channel quick adjusting valve 13, wherein the main adjusting valve 4 is installed on the main pipeline 3 and used for adjusting the high flow of the high-pressure air flow. The main regulating valve 4 adopts a linear throttling valve and comprises a linear throttling head 5 and a driving device 6, the driving device 6 can drive the linear throttling head 5 to move back and forth so as to change the flow area of the pipeline, the characteristics that the size of the linear throttling valve is larger, the air flow pressure is higher, and the flow range is larger are utilized, so that the large-range flow regulation of the main pipeline 3 is realized, and the regulation of the pressure of the regulated air flow 18 is finally realized by the conversion of the flow regulation.
The multi-channel quick adjusting valve 13 is arranged in parallel with the main adjusting valve 4, and the multi-channel quick adjusting valve 13 is arranged on the secondary pipeline 12 which is arranged in parallel with the main pipeline 3 and used for realizing small-flow, quick and high-precision adjustment of high-pressure air flow in the secondary pipeline 12.
The multi-channel quick adjusting valve 13 comprises a plurality of throttling nozzles 15 arranged in parallel and quick valves 16 respectively connected with the throttling nozzles 15 in series, each throttling nozzle 15 is communicated with the secondary pipeline 12 through the sub-pipeline 14, the sub-pipeline 14 can be quickly opened or closed by controlling the quick valves 16, the quick adjusting function and the throttling area changing function of flow are achieved, and the adjusting time of the quick valves 16 can reach millisecond level. The sizes of the throttling nozzles 15 arranged in different passages side by side are different, and the throat areas of the nozzles among the different throttling nozzles 15 are arranged according to a multiple relation and can be increased or reduced in multiples, wherein the throat area of the smallest nozzle determines the minimum flow resolution of the secondary pipeline 12. The multi-channel quick adjusting valve 13 is provided with the specific number of the branch pipelines 14 side by side, and the specific design can be carried out according to the flow proportion of the whole measuring range and the required small flow.
The increment of the flow control of the secondary pipeline 12 is determined by the required number of the throttling nozzles 15 and the nozzle throat area of the minimum throttling nozzle 15, and the control precision is determined by the flow rate of the minimum throttling nozzle 15. The multi-channel quick regulating valve 13 has limited flow capacity, is mainly used for improving precision and quick regulation, plays a role in fine adjustment and supplement for large flow regulation, and can also be independently used for regulating small flow.
The feedback control system 7 determines the opening of the linear throttle valve in the main pipeline 3 according to the required flow or pressure, and determines the number of the throttle nozzles 15 to be opened and the adaptive throat area of the throttle nozzles 15 according to the requirement of flow precision, so that the multi-channel quick regulating valve 13 in the secondary pipeline 12 realizes small-flow, quick and high-precision regulation, and further realizes stable control on the outlet flow and pressure of the regulating device.
The feedback control system 7 comprises a controller 8, an arithmetic unit 9, a first sensor 10 and a second sensor 11, the controller 8 is connected with the arithmetic unit 9, the first sensor 10 is connected with the inlet 2 of the acquisition device, the second sensor 11 is connected with the outlet 17 of the acquisition device, the first sensor 10 and the second sensor 11 are also connected with the arithmetic unit 9, and the controller 8 is also connected with the driving device 6 and the quick valve 16; the first sensor is used for acquiring a total pressure value P01 and a total temperature value T01 of the high-pressure air flow at the inlet 2 of the device and feeding back the total pressure value P01 and the total temperature value T01 to the arithmetic unit; the second sensor 11 comprises a pressure sensor and a gas mass flowmeter, and is used for acquiring a total pressure value P02 and a gas mass flow m3 of the high-pressure gas flow after the mixed gas is regulated by the main pipeline and the secondary pipeline respectively and feeding back the total pressure value P02 and the gas mass flow m3 to the arithmetic unit. The controller 8 controls the driving device 6 in the main regulating valve 4 according to data fed back by the arithmetic unit 9 to realize the regulating opening degree of the linear throttling head 5 on the pipeline flow area, the actuating speed of the driving device 6 can ensure the actuating precision within 0.1mm and the actuating speed of 1-2m/s, and simultaneously, the multi-channel quick regulating valve 13 can realize the quick regulation on the millisecond order of the throttling area of the secondary pipeline 12 by opening or closing the quick valve 16 in each branch pipeline 14, and the regulation of the pressure is finally realized by the conversion of the regulation of the flow.
Example 2
step 1, the required flow target m comprises a main regulating valve 4 in a main pipeline 3The method comprises the steps of achieving a large-range flow target m1 and adjusting a multi-channel quick adjusting valve 13 in a secondary pipeline 12 to achieve a quick, accurate and small-range flow target m2, wherein 80% -90% of the flow targets m are flow targets m1, the flow targets m1 are adjusted by a main adjusting valve 4, m1 is k m, the value range of k is 0.8-0.9, and the throttle area formed by a linear throttle valve is calculated and obtained according to the flow targets m1 of a main pipeline 3, the total pressure value P01 and the total temperature value T01 of high-pressure air flow at an inlet 2 of a device
According to a linear change formula A of the throttle area and the opening of the linear throttle valve, wherein C is a linear change coefficient, the opening of the linear throttle valve is determined through inverse calculation, namely L is A/C, and then the feedback control system 7 controls the driving device 6 to achieve the required opening, so that a flow value close to a flow target m1 is obtained.
And 3, comparing the gas mass flow m3 acquired by the second sensor 11 at the device outlet 17 with a required flow target m by the arithmetic unit 9 of the feedback control system 7, and adjusting only the multi-channel quick adjusting valve 13 according to the comparison result without adjusting the opening of the main adjusting valve 4. The specific adjusting process is as follows:
when the collected gas mass flow m3 is greater than the flow target m, the arithmetic unit 9 rapidly closes the throttle nozzles 15 with the adaptive number through the controller 8, so as to achieve the purpose of rapidly and accurately reducing the flow; when the collected gas mass flow m3 is smaller than the flow target m, the arithmetic unit 9 rapidly opens the throttling nozzles 15 in an adaptive number through the controller 8, so as to achieve the purpose of rapidly and accurately increasing the flow, and the gas mass flow m3 is adjusted for multiple times until the gas mass flow m3 reaches the required flow target m.
Example 3
the high-pressure airflow at the inlet 2 of the device is total pressure value P01, and the high-pressure airflow at the outlet 17 of the device is total pressure P02, namely the total pressure of the airflow after the airflow of the main pipeline 3 flows through the linear throttle valve and the airflow of the secondary pipeline 12 flows through the multi-channel quick adjusting valve 13. When the total pressure ratio σ is P02/P01 is less than 0.77 (namely, the existing parameters which need to be met when the linear throttling head needs to be in a throttling state), the high-pressure airflow in the main pipeline 3 can reach the throttling state by flowing through the main regulating valve 4 and the multi-channel quick regulating valve 13, the total pressure P02 acquired by the second sensor 11 at the device outlet 17 is compared with the required pressure target P0 by the arithmetic unit 9 of the feedback control system 7, and when the total pressure P02 is greater than the pressure target P0, the arithmetic unit 9 quickly closes the throttling nozzles 15 with the adaptive number through the controller 8, so that the purpose of quickly and accurately reducing the flow is achieved; when the total pressure P02 is less than the pressure target P0, the arithmetic unit 9 rapidly opens an appropriate number of throttling nozzles 15 through the controller 8, so as to achieve the purpose of rapidly and accurately increasing the flow rate, by adjusting the high-pressure airflow at the device outlet 17 for a plurality of times until the total pressure P02 reaches the required pressure target P0.
The above description is only the preferred embodiments of the present invention, and these embodiments are all based on the present invention, and the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A wide range high precision gas pressure and flow quick adjustment device comprising:
the main regulating valve (4) is arranged on the main pipeline (3) and is used for regulating the flow of the high-pressure airflow according to the requirement;
a feedback control system (7) for controlling the opening of the main regulating valve (4) in accordance with a flow target or a pressure target of the high-pressure gas flow in the main line (3),
the method is characterized in that: also comprises a multi-channel quick adjusting valve (13) which is connected with the main adjusting valve (4) in parallel,
the multi-channel quick adjusting valve (13) is arranged on a secondary pipeline (12) which is connected with the main pipeline (3) in parallel and is used for adjusting the flow of high-pressure air flow; the multi-channel quick adjusting valve (13) comprises a plurality of throttling nozzles (15) which are arranged in parallel and quick valves (16) which are respectively connected with the throttling nozzles (15) in series, and the feedback control system (7) is used for controlling the opening and closing of each quick valve (16).
2. A wide range high precision rapid gas pressure and flow regulating device as claimed in claim 1, wherein: the sizes of the nozzles of the throttling nozzles (15) are different, the throat areas of the nozzles of the throttling nozzles (15) are arranged according to a multiple relation, and the minimum throat area of the throttling nozzle (15) is arranged according to the requirement of adjusting precision.
3. A wide-range high-precision gas pressure and flow rate quick-adjustment device as claimed in claim 1 or 2, characterized in that: the main regulating valve (4) is a linear throttling valve and comprises a linear throttling head (5) and a driving device (6) for driving the linear throttling head (5) to move, and the feedback control system (7) realizes the regulation of the throttling area of the pipeline by the linear throttling head (5) by controlling the driving device (6).
4. A wide range high accuracy rapid gas pressure and flow regulator as defined in claim 3, wherein: the feedback control system (7) comprises a controller (8), an arithmetic unit (9), a first sensor (10) and a second sensor (11), wherein the first sensor (10) is used for acquiring a total pressure value P01 and a total temperature value T01 of the high-pressure airflow at the inlet (2) of the device and feeding back the total pressure value P01 and the total temperature value T01 to the arithmetic unit (9); the second sensor (11) is used for collecting a total pressure value P02 and a gas mass flow m3 of high-pressure gas flow at the position of an outlet (17) of the device after the main pipeline (3) and the secondary pipeline (12) are adjusted and mixed, and feeding back to the arithmetic unit (9), and the controller (8) controls the opening degree of the main adjusting valve (4) and the opening and closing of the multi-channel quick adjusting valve (13) according to data fed back by the arithmetic unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021930896.0U CN212433647U (en) | 2020-09-07 | 2020-09-07 | Wide-range high-precision gas pressure and flow quick adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021930896.0U CN212433647U (en) | 2020-09-07 | 2020-09-07 | Wide-range high-precision gas pressure and flow quick adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212433647U true CN212433647U (en) | 2021-01-29 |
Family
ID=74274278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021930896.0U Active CN212433647U (en) | 2020-09-07 | 2020-09-07 | Wide-range high-precision gas pressure and flow quick adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212433647U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448397A (en) * | 2022-09-29 | 2022-12-09 | 中国科学院武汉病毒研究所 | Continuous wastewater treatment device and method with accurate and stable temperature control |
-
2020
- 2020-09-07 CN CN202021930896.0U patent/CN212433647U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115448397A (en) * | 2022-09-29 | 2022-12-09 | 中国科学院武汉病毒研究所 | Continuous wastewater treatment device and method with accurate and stable temperature control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112000160A (en) | Wide-range high-precision gas pressure and flow rapid adjusting device and adjusting method thereof | |
| KR101690583B1 (en) | Gas diversion supply device and gas diversion supply method | |
| CN107180984B (en) | Fuel cell system and its control method | |
| CN102863074A (en) | Intelligent control method of blast aeration system of municipal sewage plant | |
| CN212433647U (en) | Wide-range high-precision gas pressure and flow quick adjusting device | |
| CN113311881B (en) | Mass flow controller and flow control method | |
| CN114784342B (en) | Anti-surge fuel cell air supply control method, system and device | |
| CN113008507A (en) | High-flow high-stability Mach number wind tunnel rapid adjusting system and method based on temporary flushing gas source | |
| US6494047B2 (en) | Airflow sharing | |
| CN110319509A (en) | A kind of air conditioner cold-heat water system constant flow matter adjustable type energy-saving control device | |
| CN105066341B (en) | Suitable for the change water temperature control system of air-conditioning Primary pump system | |
| CN106765520B (en) | Automatic control method for realizing optimal initial pressure operation of heat supply unit | |
| CN103334799B (en) | Method and system for controlling air inflow of double air inflow condensation-type turbine | |
| CN114464848A (en) | Hydrogen flow load matching control method and device for vehicle-mounted hydrogen supply system | |
| CN104375529B (en) | A kind of control pressurer system of engine nozzle experiment | |
| CN109237111A (en) | A kind of pressure-regulating hydraulic system and its control method of self-balancing pressure regulator valve | |
| CN202705569U (en) | Pressure control system for silicon carbide single crystal growing furnace | |
| CN112327602A (en) | Variable cycle engine gas path component fault gain scheduling fault-tolerant controller | |
| CN204830333U (en) | Become water temperature control system suitable for air conditioner two stage pump system | |
| CN217473189U (en) | High-precision fuel gas follow-up flow heat value control system | |
| RU2319126C1 (en) | Method and device for pressure control in space | |
| CN112764437A (en) | Automatic control method for air flow regulation of test bed based on pneumatic regulating valve | |
| CN212180747U (en) | Gas divider | |
| CN219800935U (en) | Fuel cell air loop back pressure control device | |
| CN110442155B (en) | Method for accurately adjusting liquid oxygen flow of variable-ratio heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |