CN113867433A - Double-channel atmospheric parameter pressure control gas circuit and adjusting method - Google Patents
Double-channel atmospheric parameter pressure control gas circuit and adjusting method Download PDFInfo
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Abstract
The invention discloses a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, belonging to static pressure measurement calibration instruments. The device comprises a pressure sensor and a pressure component which are sequentially connected by a pipeline to form three main parts of an air source system, a static pressure channel and a full pressure channel, wherein a pressure output interface of the static pressure channel and a pressure output interface of the full pressure channel are respectively led out and are used for connecting a calibrated atmospheric parameter instrument. In the pressure adjusting process, the pressure/vacuum integrated air pump provides initial pressure, the pressure is adjusted to fixed pressure through the pressure reducer with reasonable layout, the flow of air entering and discharging the system is controlled by the flow adjusting valve, and the opening and closing time of the passage where the stop valve is arranged is controlled to finally realize accurate pressure control. The double-channel pressure control of the invention adopts a flow control mode, realizes the control of the gas pressure by increasing or reducing the mass of the gas in the closed cavity, can cope with the condition that the object to be corrected has larger load volume, and has less influence on the control speed.
Description
Technical Field
The invention belongs to a static pressure measurement calibration instrument, and relates to a two-channel atmospheric parameter pressure control gas circuit and an adjusting method.
Background
With the development of modern aerospace technology, various aircraft (e.g., military aircraft, drones, missiles, etc.) place more accurate demands on atmospheric parameters measured in flight.
The atmospheric data required by the aircraft generally refers to relative parameters of the atmosphere around the fuselage of the aircraft in the flying process, the atmospheric data testing system is an important system for the aircraft to obtain the flying parameters relative to the external environment in the flying process, and the calculation and output of the flying atmospheric parameters including vacuum speed, Mach number, barometric altitude, field pressure, lifting speed, attack angle, sideslip angle, total atmospheric temperature, static atmospheric temperature, atmospheric density ratio, atmospheric pressure ratio, cabin pressure difference and the like are completed by measuring the pressure (full pressure and static pressure), temperature and airflow angle of the external flow field of the aircraft, so that the atmospheric data testing system is provided for aircraft systems such as flight control, avionics, electromechanics, environmental control, engine control, inertial navigation and the like. The atmospheric data testing system can solve atmospheric parameters according to the atmospheric data testing system, can also be combined with a flight envelope designed in advance by the system to judge the states of airplane stall, overspeed and the like, and triggers a related warning system, so that the real-time performance, reliability and accuracy of the atmospheric data directly influence the flight safety and performance of the airplane.
The altitude is the most basic flight parameter of the airplane, and currently, a pneumatic altimeter is used for measuring the altitude more frequently. The working principle of the air pressure type altimeter is that the altitude is indirectly measured by measuring the static pressure according to the relation between the altitude and the pressure (the static pressure of air is maximum on the sea level and is exponentially reduced along with the increase of the altitude).
The mach number is the ratio of the true airspeed to the sonic speed in flight, related to the ratio of the full pressure to the static pressure.
The true airspeed refers to the speed of movement of the aircraft center of gravity relative to the air, and can be simply solved by Mach number and sonic velocity.
The indicated airspeed refers to the airspeed that the aircraft has, which is related to the difference between full pressure and static pressure, being normalized to the speed of movement of the aircraft relative to the air at standard sea level.
The atmospheric parameter instruments comprise an atmospheric data testing system and various independent air pressure type altimeters, Mach number meters, airspeedmeters and the like, and can be obtained by measuring static pressure and full pressure and resolving through a functional relation, so that the atmospheric parameter instruments are all closely related to pressure values, the static pressure range of the atmospheric parameter instruments and the related atmospheric parameter instruments is generally not more than 135kPa, and the full pressure range is generally not more than 350 kPa. Generally, a pressure higher than atmospheric pressure (about 101.3 kPa) is referred to as positive pressure, a pressure lower than atmospheric pressure is referred to as negative pressure, and the closer the pressure value is to 0Pa, the higher the vacuum degree is.
The invention is generated under the technical background, a pressure/vacuum source is arranged in a double-channel atmospheric parameter pressure control gas circuit system, a static pressure and total pressure double-channel control system is used, each channel can be independently controlled, and the invention provides the functions of measuring and controlling the pressure parameters and the flight parameters by combining a perfect resolving method, and is used for quickly and accurately calibrating and testing the static pressure, the total pressure, an altimeter, an airspeed meter and a Mach number meter. The automatic test function of the aircraft flight safety test platform can obviously reduce the working time and ensure the safety of a tested system no matter in a laboratory, a production line or in the aspects of aircraft ground maintenance guarantee and routine inspection, thereby ensuring the flight safety performance of the aircraft.
Disclosure of Invention
In order to solve the problem that the design of the conventional single-channel pressure control gas circuit cannot meet the calibration requirement of an atmospheric parameter instrument, the invention aims to provide a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, so that the quick and high-precision control of double-channel pressure is realized, and the accurate and reliable tracing of the atmospheric parameter instrument is supported.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a double-channel atmospheric parameter pressure control gas circuit, which comprises a pressure sensor and a pressure component, wherein the pressure sensor and the pressure component are sequentially connected through a pipeline to form three main parts, namely a gas source system, a static pressure channel and a full pressure channel, and a static pressure channel pressure output interface and a full pressure channel pressure output interface are respectively led out and used for being connected with a calibrated atmospheric parameter instrument.
The air source system mainly comprises a pressure sensor A, an air storage tank A, a stop valve A, a pressure/vacuum integrated air pump, a stop valve B, an air storage tank B, a pressure sensor B and a tee joint A; the double channel refers to static pressure and full pressure two independent channels. The static pressure channel consists of a pressure reducer A, a flow regulating valve B, a tee joint B, a stop valve C, a gas storage tank C, a static pressure sensor and a stop valve F; the full-pressure channel consists of a pressure reducer B, a negative pressure switching valve, a positive pressure switching valve, a flow regulating valve C, a flow regulating valve D, a tee joint C, a stop valve D, an air storage tank D, a full-pressure sensor and a stop valve G; and the full-pressure channel and the static-pressure channel control the connection and the closing of the two independent channels through a stop valve E.
The static pressure channel and the full pressure channel are respectively provided with a positive pressure control channel and a negative pressure control channel; the pressure reducer A and the flow regulating valve A mainly undertake a positive pressure control task of the static pressure channel, and the flow regulating valve B undertakes a negative pressure control task of the static pressure channel; the pressure reducer B, the positive pressure switching valve and the flow regulating valve D undertake the positive pressure control task of the full pressure channel; the negative pressure switching valve and the flow regulating valve C undertake the negative pressure control task of the full pressure channel.
The pipeline is mainly used for connecting each pressure component.
The pressure sensor a is mainly used for monitoring the pressure of the air storage tank a.
The main functions of the gas storage tank A are as follows: the gas storage tank A is provided with four external ports which are respectively connected with a pressure sensor A, a stop valve A, a pressure reducer A and a pressure reducer B; the air storage tank A stores preset constant pressure conveyed by the pressure/vacuum integrated air pump and supplies positive pressure to the pressure reducers of the two independent channels;
stop valve A, stop valve B, stop valve C, stop valve D's main function is: controlling the communication and closing of the upper, lower, left and right passages;
the pressure/vacuum integrated air pump has the main functions of: the air source system is used as an important component of an air source system, bears the pressure generating task, can provide positive pressure and negative pressure, can convey positive pressure with preset constant pressure to the air storage tank A, and can convey vacuum pressure with a preset range to the air storage tank B.
The main functions of the gas storage tank B are as follows: the air storage tank B is provided with three external ports which are respectively connected with the pressure sensor B, the stop valve B and the tee joint A, stores the vacuum pressure in a preset range conveyed by the air pump, and supplies negative pressure to the negative pressure control passages of the two independent channels.
The pressure sensor B is used to monitor the pressure of the air reservoir B.
The pressure reducer A is mainly used for reducing the preset constant pressure conveyed by the gas storage tank A to the set pressure and providing the preset constant pressure for the flow electromagnetic valve A;
the main functions of the tee joint A, the tee joint B and the tee joint C are as follows: three ports are arranged and communicated with the three passages;
the pressure reducer B is mainly used for reducing the preset constant pressure conveyed by the gas storage tank A to a set pressure and providing the preset constant pressure to the flow electromagnetic valve D;
the main functions of the negative pressure switching valve are as follows: the negative pressure air source switching device is used for switching a negative pressure air source of a full pressure channel, is a three-way valve, is provided with an opening for directly connecting atmosphere except that two ends of the negative pressure air source are respectively connected to an air storage tank B and a flow electromagnetic valve C, and is characterized in that when the negative pressure switching valve is closed, a passage between the air storage tank B and the flow electromagnetic valve C is cut off, meanwhile, the connection between the atmosphere and the flow electromagnetic valve C and the atmosphere is opened, and at the moment, the negative pressure air source of a negative pressure control passage is provided by atmospheric pressure; when the negative pressure switching valve is opened, the gas storage tank B is connected with the flow electromagnetic valve C, and meanwhile, the connection between the atmosphere and the flow electromagnetic valve C and the atmosphere is cut off, and a negative pressure gas source of the negative pressure control passage is provided by the pressure/vacuum integrated air pump;
the positive pressure switching valve is mainly used for switching the positive pressure gas source of the full pressure channel, is also a three-way valve and has the same function as the negative pressure switching valve.
The flow regulating valves A, B, C and D are mainly used for controlling the flow of gas output and discharged from the downstream gas storage tank and playing a role in controlling the pressure of the passage.
The static pressure sensor is mainly used for accurately measuring the gas pressure of the static pressure channel in real time.
The full-pressure sensor is mainly used for accurately measuring the gas pressure of a full-pressure channel in real time.
The main functions of the gas storage tank C and the gas storage tank D are to store static pressure gas and full pressure gas respectively.
The main functions of the stop valve F and the stop valve G are as follows: the gas discharged from the gas tank C, D to the atmosphere is separately controlled.
The control modes of the full-pressure channel and the static-pressure channel can be controlled simultaneously, and respective target pressure values are met.
The invention discloses a two-channel atmospheric parameter pressure control and regulation method, which is realized based on a two-channel atmospheric parameter pressure control gas circuit and comprises the following steps:
step 1: stop valve C, stop valve D, stop valve G, stop valve E, stop valve F are in the closed condition when control begins, and two independent passageways cut off, mutual noninterference, and control begins, and air supply system begins work, for entire system provides initial pressure, and stop valve F opens, and static pressure passageway and atmosphere intercommunication, static pressure passageway pressure sensor measure atmospheric pressure P0The full-pressure channel full-pressure sensor measures the pressure value P of the current gas storage tank D2And the full pressure target set value P1Comparing, and generating a control signal by using the two pressure difference values to control the opening and closing time of the flow regulating valve and the stop valve D;
step 2: when P is present2Less than P1I.e. the current pressure is less than the target pressure, and P1＞P0The positive pressure switching valve is opened, the pressure reducer B provides preset pressure for a positive pressure source, the stop valve D is opened, the flow regulating valve D starts to work, the pressure-regulated gas enters the gas storage tank D, and the full pressure is increased; p1＜P0The positive pressure switching valve is closed, the positive pressure source is provided by the atmospheric pressure, the gas enters the gas storage tank D after pressure regulation, and the full pressure is increased;
and step 3: when P is present2Greater than P1I.e. the current pressure is greater than the target pressure, and P1＞P0The negative pressure switching valve is closed, the negative pressure source is provided by the atmospheric pressure, and the flow regulating valve C is startedWorking, the gas enters a gas storage tank D after pressure regulation, and the full pressure is reduced; p1＜P0When the negative pressure switching valve is closed, the negative pressure source is provided by the vacuum pressure of the pressure/vacuum integrated air pump, the flow regulating valve C starts to work, the pressure-regulated air enters the air storage tank D, and the full-pressure is reduced;
and 4, step 4: p1＝P0I.e. the target pressure value is required to be the same as the atmospheric pressure, the stop valve G is opened and the full pressure passage is communicated with the atmosphere.
To accurately reach the target pressure value, steps 2 or 3 need to be repeated through a plurality of control cycles.
Preferably, the upper limit of the measurement range of the pressure sensor A is 1000 kPa. The constant pressure of the air storage tank A in storage pressure/vacuum integrated air pump in conveying is about 700kPa, and about 700kPa is determined according to a preset constant pressure range.
The upper limit of the measuring range of the pressure sensor B is 120 kPa. The pressure/vacuum integrated air pump delivers about 200Pa of vacuum pressure to the air storage tank B, and the about 200Pa is determined according to a preset vacuum pressure range.
The pressure reducer A reduces the pressure of 700kPa conveyed by the air storage tank A to 170 kPa.
The pressure reducer B reduces the pressure of 700kPa conveyed by the air storage tank A to 370 kPa.
The static pressure sensor measures the range (5-120) kPa.
The full-pressure sensor measures the range (5-360) kPa.
Has the advantages that:
1. the invention discloses a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, wherein the double-channel pressure control adopts a flow control mode, the control of gas pressure is realized by increasing or reducing the mass of gas in a closed cavity, the condition that a corrected object has larger load volume can be met, and the influence on the control speed is smaller.
2. The invention discloses a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, in the pressure adjusting process, initial pressure is provided by a pressure/vacuum integrated gas pump, the pressure is adjusted to fixed pressure by a pressure reducer in reasonable layout, the gas flow entering and discharging systems is controlled by a flow adjusting valve, and the opening and closing time of a passage where a stop valve is arranged is controlled to finally realize accurate pressure control.
3. The invention discloses a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, which adopt independent control of atmospheric parameter full pressure and static pressure double channels, can realize quick full-automatic control and accurate adjustment of any pressure point within the whole pressure range of 5kPa to 350kPa through mutual matching of the full pressure and the static pressure double channels, and meet the field calibration requirement of an atmospheric parameter instrument.
4. The invention discloses a double-channel atmospheric parameter pressure control gas circuit and an adjusting method, which provide a practicable technical means for the rapid verification of atmospheric parameter instruments used by civil aircrafts, military fighters, helicopters, shipboard aircrafts and the like, thereby reducing the labor intensity of laboratory and field calibration and improving the working efficiency of calibration.
5. According to the double-channel atmospheric parameter pressure control gas circuit and the adjusting method, the double-channel pressure control gas circuit can meet the calibration requirement of an atmospheric parameter instrument, and can also meet the requirement of simultaneous symmetrical pressurization of H, L ends of most differential pressure instruments.
Drawings
FIG. 1 is a schematic diagram of a two-channel atmospheric parameter pressure control gas path structure according to the present invention.
The system comprises a 1-pipeline, a 2-pressure sensor A, a 3-gas storage tank A, a 4-stop valve A, a 5-pressure/vacuum integrated air pump, a 6-stop valve B, a 7-gas storage tank B, a 8-pressure sensor B, a 9-pressure reducer A, a 10-three-way valve A, a 11-pressure reducer B, a 12-negative pressure switching valve, a 13-positive pressure switching valve, a 14-flow regulating valve A, a 15-flow regulating valve B, a 16-flow regulating valve C, a 17-flow regulating valve D, a 18-three-way valve B, a 19-stop valve C, a 20-stop valve D, a 21-three-way valve C, a 22-static pressure sensor, a 23-gas storage tank C, a 24-stop valve E, a 25-gas storage tank D, a 26-full pressure sensor, a 27-static pressure channel pressure output interface, a 28-stop valve F, a 29-full pressure channel pressure output interface and a 30-stop valve G.
Detailed Description
In order to better explain the technical scheme of the invention, the invention is further explained by 1 specific embodiment with reference to the attached drawing 1.
As shown in fig. 1, the two-channel atmospheric parameter pressure control gas circuit disclosed in this embodiment includes pressure components such as a pressure sensor and a stop valve, which are connected in sequence by a pipeline 1 to form three main parts, namely, an air source system, a static pressure channel and a full pressure channel, and finally, a static pressure channel pressure output interface 27 and a full pressure channel pressure output interface 29 are respectively led out to connect to a calibrated atmospheric parameter instrument.
The air source system consists of a pressure sensor A2, an air storage tank A3, a stop valve A4, a pressure/vacuum integrated air pump 5, a stop valve B6, an air storage tank B7, a pressure sensor B8 and a tee joint A10; the double channels refer to static pressure and full pressure two independent channels, and the static pressure channel consists of a pressure reducer A9, a flow regulating valve A14, a flow regulating valve B15, a tee joint B18, a stop valve C19, an air storage tank C23, a static pressure sensor 22 and a stop valve F28; the full-pressure channel consists of a pressure reducer B11, a negative pressure switching valve 12, a positive pressure switching valve 13, a flow regulating valve C16, a flow regulating valve D17, a tee joint C21, a stop valve D20, an air storage tank D25, a full-pressure sensor 26 and a stop valve G30; the full pressure channel and the static pressure channel are connected and closed by a stop valve E24.
The static pressure channel and the full pressure channel are respectively provided with a positive pressure control channel and a negative pressure control channel; the pressure reducer A9 and the flow regulating valve A14 mainly undertake the positive pressure control task of the static pressure channel, and the flow regulating valve B15 undertake the negative pressure control task of the static pressure channel; the pressure reducer B11, the positive pressure switching valve 13 and the flow regulating valve D17 are used for carrying out positive pressure control on the full pressure channel; the negative pressure switching valve 12 and the flow regulating valve C16 undertake the negative pressure control task of the full pressure channel;
the main functions of the circuit 1 are: connecting each pressure component;
the main functions of the pressure sensor a2 are: monitoring the pressure of the air storage tank A3 with the upper limit of the measuring range being 1000 kPa;
the main functions of the air storage tank A3 are: the air storage tank A3 is provided with 4 external ports which are respectively connected with a pressure sensor A2, a stop valve A4, a pressure reducer A9 and a pressure reducer B11, stores the constant pressure of 700kPa transmitted by the air pump and supplies positive pressure to the pressure reducers of two independent channels;
the main functions of the stop valve A4, the stop valve B6, the stop valve C19 and the stop valve D20 are as follows: controlling the communication and closing of the upper, lower, left and right passages;
the main functions of the pressure/vacuum integrated air pump 5 are: the air source system is an important component of an air source system, can bear the pressure generating task, can provide positive pressure and negative pressure, can convey positive pressure of about 700kPa to an air storage tank A3, and can convey vacuum pressure of about 200Pa to an air storage tank B7;
the main functions of the air storage tank B7 are as follows: the air storage tank B7 is provided with 3 external ports which are respectively connected with a pressure sensor B8, a stop valve B6 and a tee joint A10, stores the vacuum pressure of about 200Pa transmitted by the air pump and supplies negative pressure to the negative pressure control passages of two independent channels;
the main functions of the pressure sensor B8 are: monitoring the pressure of the air storage tank B7 with the upper limit of the measuring range being 120 kPa;
the main functions of said pressure reducer a9 are: the pressure of 700kPa delivered by the air storage tank A is reduced to 170kPa and is supplied to a flow electromagnetic valve A14;
the main functions of the tee joint A10, the tee joint B18 and the tee joint C21 are as follows: three ports are arranged and communicated with the three passages;
the main functions of said stress-reducer B11 are: the pressure of 700kPa delivered by the air storage tank A is reduced to 370kPa and is supplied to a flow electromagnetic valve D17;
the main functions of the negative pressure switching valve 12 are: the negative pressure air source switching device is a three-way valve, the two ends of the negative pressure air source switching device are respectively connected to an air storage tank B7 and a flow electromagnetic valve C16, an opening is directly connected with atmosphere, when the negative pressure switching valve is closed, a passage between the air storage tank B7 and the flow electromagnetic valve C16 is cut off, meanwhile, the connection between the atmosphere and the flow electromagnetic valve C16 and the atmosphere is opened, and at the moment, the negative pressure air source of the negative pressure control passage is provided by the atmosphere pressure; when the negative pressure switching valve is opened, the air storage tank B7 is connected with the flow electromagnetic valve C16, meanwhile, the connection between the atmosphere and the flow electromagnetic valve C16 and the atmosphere is cut off, and at the moment, the negative pressure air source of the negative pressure control passage is provided by the pressure/vacuum integrated air pump 5;
the main functions of the positive pressure switching valve 13 are: the positive pressure air source switching device is used for switching a full pressure channel, is also a three-way valve and has the same function as the negative pressure switching valve 12;
the flow regulating valves A14, B15, C16 and D17 have the following main functions: the device is responsible for controlling the flow of the gas output and discharged to the downstream gas storage tank and playing a role in controlling the pressure of the passage;
the main functions of the hydrostatic pressure sensor 22 are: the measuring range is 5-120 kPa, and the gas pressure of the static pressure channel is accurately measured in real time;
the main functions of the full pressure sensor 26 are: the measuring range is 5-360 kPa, and the gas pressure of the full-pressure channel is accurately measured in real time;
the main functions of the air storage tank C23 and the air storage tank D25 are as follows: respectively storing static pressure and full pressure gas;
the main functions of the stop valves F28 and G30 are as follows: the gas discharged from the gas tanks C23 and D25 to the atmosphere was controlled.
The method for controlling and adjusting the pressure of the two-channel atmospheric parameter disclosed by the embodiment is realized based on the two-channel atmospheric parameter pressure control gas circuit, and comprises the following steps of:
setting a static pressure target pressure value to P350kPa, the target full pressure value P1＝300kPa。
Step 1: stop valve C19, stop valve D20, stop valve G30, stop valve E24, stop valve F28 are in the closed condition when control begins, and two independent passageways cut off, mutual noninterference, and control begins, and air supply system begins work, for whole system provides initial pressure, and stop valve F28 is opened, and static pressure passageway and atmosphere intercommunication, static pressure passageway pressure sensor 22 measure atmospheric pressure P0101kPa, and a static pressure target pressure value P3Compared with the prior art, the full-pressure channel full-pressure sensor 26 measures the current pressure value P of the air storage tank D252200kPa, and the full pressure target set value P1Comparing, and generating control signals by using the two pressure difference values to control the opening and closing time of the flow regulating valve and the stop valves C19 and D20;
step 2: shut-off valve F28 is closed because of the static pressure target pressure value P3Less than the current atmospheric pressure P0The flow electromagnetic valve B15 works, the static pressure channel is decompressed, the stop valve C19 is opened, the gas which is accurately regulated enters the gas storage tank C23, and the static pressure value is reduced to 50 kPa;
and step 3: while the static pressure channel is working, the full pressure channel is also controlled because P1＞P2＞P0The positive pressure switching valve 13 is opened, the pressure of the positive pressure source is about 370kPa provided by a pressure reducer B11, the stop valve D20 is opened, the flow regulating valve D17 starts to work, the pressure-regulated gas enters the gas storage tank D25, and the full pressure is increased from 200kPa upwards; however, because of control overshoot, the full pressure value after control is 305kPa, at this time, the full pressure channel needs to be depressurized, and the current 305kPa is slightly higher than the full pressure target pressure value P1And the pressure is far higher than the 200Pa negative pressure source provided by the pressure/vacuum integrated air pump 5, in order to prevent unstable control if the negative pressure source pressure is too low when the low pressure is controlled, when the negative pressure switching valve 12 is closed, the passage between the air storage tank B7 and the flow electromagnetic valve C16 is cut off, and meanwhile, the connection between the atmosphere and the flow electromagnetic valve C16 and the atmosphere is opened, at the moment, the negative pressure source of the negative pressure control passage is enough provided by the atmosphere pressure, the flow electromagnetic valve C16 works, the gas after pressure regulation enters the air storage tank D25, the full pressure is reduced to 300kPa, and the target pressure value is realized.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a binary channels atmospheric parameter pressure control gas circuit which characterized in that: the device comprises a pressure sensor and pressure components which are sequentially connected by a pipeline (1) to form three main parts of an air source system, a static pressure channel and a full pressure channel, and a static pressure channel pressure output interface (27) and a full pressure channel pressure output interface (29) are respectively led out and used for connecting a calibrated atmospheric parameter instrument; the air source system consists of a pressure sensor A (2), an air storage tank A (3), a stop valve A (4), a pressure/vacuum integrated air pump (5), a stop valve B (6), an air storage tank B (7), a pressure sensor B (8) and a tee joint A (10); the double channels refer to static pressure and full pressure independent channels, and the static pressure channel consists of a pressure reducer A (9), a flow regulating valve A (14), a flow regulating valve B (15), a tee joint B (18), a stop valve C (19), an air storage tank C (23), a static pressure sensor (22) and a stop valve F (28); the full-pressure channel consists of a pressure reducer B (11), a negative pressure switching valve (12), a positive pressure switching valve (13), a flow regulating valve C (16), a flow regulating valve D (17), a tee joint C (21), a stop valve D (20), an air storage tank D (25), a full-pressure sensor (26) and a stop valve G (30); the connection and closing of the two independent channels are controlled by a stop valve E (24) through a full pressure channel and a static pressure channel.
2. The two-channel atmospheric parameter pressure control gas circuit as claimed in claim 1, wherein: the static pressure channel and the full pressure channel are respectively provided with a positive pressure control channel and a negative pressure control channel; the pressure reducer A (9) and the flow regulating valve A (14) are mainly used for bearing the positive pressure control task of the static pressure channel, and the flow regulating valve B (15) is used for bearing the negative pressure control task of the static pressure channel; the pressure reducer B (11), the positive pressure switching valve (13) and the flow regulating valve D (17) undertake the positive pressure control task of the full pressure channel; the negative pressure switching valve (12) and the flow regulating valve C (16) undertake the negative pressure control task of the full pressure channel.
3. The two-channel atmospheric parameter pressure control gas circuit as claimed in claim 2, wherein:
the pipeline (1) is mainly used for connecting each pressure component;
the pressure sensor A (2) is mainly used for monitoring the pressure of the air storage tank A (3);
the gas storage tank A (3) is provided with four external ports which are respectively connected with a pressure sensor A (2), a stop valve A (4), a pressure reducer A (9) and a pressure reducer B (11); the air storage tank A (3) is mainly used for storing preset constant pressure conveyed by the pressure/vacuum integrated air pump (5) and supplying positive pressure to the pressure reducers of the two independent channels;
the main functions of the stop valve A (4), the stop valve B (6), the stop valve C (19) and the stop valve D (20) are as follows: controlling the communication and closing of the upper, lower, left and right passages;
the pressure/vacuum integrated air pump (5) has the main functions of: the air source system is used as an important component of an air source system, bears a pressure generating task, can provide positive pressure and negative pressure, can convey positive pressure with preset constant pressure to the air storage tank A (3), and can convey vacuum pressure with a preset range to the air storage tank B (7);
the gas storage tank B (7) is provided with three external ports which are respectively connected with a pressure sensor B (8), a stop valve B (6) and a tee joint A (10). The air storage tank B (7) is mainly used for storing vacuum pressure in a preset range conveyed by an air pump and supplying negative pressure to the negative pressure control passages of the two independent channels;
the pressure sensor B (8) is mainly used for monitoring the pressure of the air storage tank B (7);
the main functions of the stress-reducer a (9) are: reducing the preset constant pressure delivered by the air storage tank A to a set pressure and providing the preset constant pressure to a flow electromagnetic valve A (14);
the main functions of the tee joint A (10), the tee joint B (18) and the tee joint C (21) are as follows: three ports are arranged and communicated with the three passages;
the main functions of the stress-reducer B (11) are: reducing the preset constant pressure delivered by the air storage tank A to the set pressure and providing the preset constant pressure to a flow electromagnetic valve D (17);
the main functions of the negative pressure switching valve (12) are: the negative pressure air source switching device is used for switching a negative pressure air source of a full pressure channel, is a three-way valve, is provided with an opening for directly connecting atmosphere except that two ends of the negative pressure air source switching device are respectively connected to an air storage tank B (7) and a flow electromagnetic valve C (16), and is characterized in that when the negative pressure switching valve is closed, a channel between the air storage tank B (7) and the flow electromagnetic valve C (16) is cut off, meanwhile, the connection between the atmosphere and the flow electromagnetic valve C (16) and the atmosphere is opened, and the negative pressure air source of a negative pressure control channel is provided by the atmospheric pressure; when the negative pressure switching valve is opened, the air storage tank B (7) is connected with the flow electromagnetic valve C (16), meanwhile, the connection between the atmosphere and the flow electromagnetic valve C (16) and the atmosphere is cut off, and a negative pressure air source of the negative pressure control passage is provided by the pressure/vacuum integrated air pump (5);
the positive pressure switching valve (13) is mainly used for switching a positive pressure gas source of a full pressure channel, is also a three-way valve and has the same function as the negative pressure switching valve (12);
the main functions of the flow regulating valve A (14), the flow regulating valve B (15), the flow regulating valve C (16) and the flow regulating valve D (17) are as follows: the device is responsible for controlling the flow of the gas output and discharged to the downstream gas storage tank and playing a role in controlling the pressure of the passage;
the static pressure sensor (22) is mainly used for accurately measuring the gas pressure of the static pressure channel in real time;
the full-pressure sensor (26) is mainly used for accurately measuring the gas pressure of a full-pressure channel in real time;
the gas storage tank C (23) and the gas storage tank D (25) are mainly used for storing static pressure gas and full pressure gas respectively;
the shutoff valves F (28) and G (30) are mainly used to control the gas discharged from the gas tanks C (23) and D (25) to the atmosphere, respectively.
4. The two-channel atmospheric parameter pressure control gas circuit as claimed in claim 3, wherein:
the upper limit of the measuring range of the pressure sensor A (2) is 1000 kPa; the constant pressure of the stored pressure/vacuum air delivered by the air storage tank A (3) and the constant pressure delivered by the vacuum integrated air pump (5) is about 700kPa, and about 700kPa is determined according to a preset constant pressure range;
the upper limit of the measuring range of the pressure sensor B (8) is 120 kPa; the pressure/vacuum integrated air pump (5) is used for delivering vacuum pressure of about 200Pa to the air storage tank B (8), and the pressure of about 200Pa is determined according to a preset vacuum pressure range;
the pressure reducer A (9) reduces the pressure of 700kPa conveyed by the air storage tank A (3) to 170 kPa;
the pressure reducer B (11) reduces the pressure of 700kPa conveyed by the air storage tank A (3) to 370 kPa;
the static pressure sensor (22) measures the range (5-120) kPa;
the full-pressure sensor (26) measures the range (5-360) kPa.
5. A two-channel atmospheric parameter pressure control adjusting method is realized based on the two-channel atmospheric parameter pressure control gas circuit as claimed in claim 2, 3 or 4, and is characterized in that: the method comprises the following steps:
the control modes of the full-pressure channel and the static-pressure channel can be controlled simultaneously to meet respective target pressure values;
step 1: stop valve C (19), stop valve D (20), stop valve G (30), stop valve E (24), stop valve F (28) are in the closed condition when control begins, and two independent passageways cut off, mutual noninterference, and control begins, and air supply system begins work, for whole system provides initial pressure, and stop valve F (28) are opened, and static pressure passageway and atmosphere intercommunication, static pressure passageway pressure sensor (22) measure atmospheric pressure P0The full-pressure channel full-pressure sensor (26) measures the current pressure value P of the air storage tank D (25)2And the full pressure target set value P1Comparing, and generating a control signal by using the two pressure difference values to control the opening and closing time of the flow regulating valve and the stop valve D (20);
step 2: when P is present2Less than P1I.e. the current pressure is less than the target pressure, and P1＞P0The positive pressure switching valve (13) is opened, a pressure reducer B (11) provides preset pressure for a positive pressure source, a stop valve D (20) is opened, a flow regulating valve D (17) starts to work, gas after pressure regulation enters a gas storage tank D (25), and full pressure is increased; p1＜P0The positive pressure switching valve (13) is closed, a positive pressure source is provided by atmospheric pressure, the gas after pressure regulation enters a gas storage tank D (25), and the full pressure is increased;
and step 3: when P is present2Greater than P1I.e. the current pressure is greater than the target pressure, and P1＞P0The negative pressure switching valve (12) is closedThe negative pressure source is provided by atmospheric pressure, the flow regulating valve C (16) starts to work, the gas enters the gas storage tank D (25) after pressure regulation, and the full pressure is reduced; p1＜P0When the negative pressure switching valve (12) is closed, the negative pressure source is provided by the vacuum pressure of the pressure/vacuum integrated air pump, the flow regulating valve C (16) starts to work, the air after pressure regulation enters the air storage tank D (25), and the full pressure is reduced;
and 4, step 4: p1＝P0I.e., the required target pressure value is the same as the atmospheric pressure, the stop valve G (30) is opened, and the full-pressure passage is communicated with the atmosphere.
To accurately reach the target pressure value, steps 2 or 3 need to be repeated through a plurality of control cycles.
6. The pressure regulating method of the two-channel atmospheric parameter pressure control gas circuit as claimed in claim 5, wherein: the upper limit of the measuring range of the pressure sensor A (2) is 1000 kPa; the constant pressure of the stored pressure/vacuum air delivered by the air storage tank A (3) and the constant pressure delivered by the vacuum integrated air pump (5) is about 700kPa, and about 700kPa is determined according to a preset constant pressure range;
the upper limit of the measuring range of the pressure sensor B (8) is 120 kPa; the pressure/vacuum integrated air pump (5) is used for delivering vacuum pressure of about 200Pa to the air storage tank B (8), and the pressure of about 200Pa is determined according to a preset vacuum pressure range;
the pressure reducer A (9) reduces the pressure of 700kPa conveyed by the air storage tank A (3) to 170 kPa;
the pressure reducer B (11) reduces the pressure of 700kPa conveyed by the air storage tank A (3) to 370 kPa;
the static pressure sensor (22) measures the range (5-120) kPa;
the full-pressure sensor (26) measures the range (5-360) kPa.
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| JPH05344950A (en) * | 1992-06-17 | 1993-12-27 | Nagano Keiki Seisakusho Ltd | Gas flow device and anomaly judging method therefor |
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