CN110873641A - Detection system and test method suitable for gas-fired room front-surface pressure regulator - Google Patents
Detection system and test method suitable for gas-fired room front-surface pressure regulator Download PDFInfo
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- CN110873641A CN110873641A CN201810993166.6A CN201810993166A CN110873641A CN 110873641 A CN110873641 A CN 110873641A CN 201810993166 A CN201810993166 A CN 201810993166A CN 110873641 A CN110873641 A CN 110873641A
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Abstract
A detection system suitable for a gas-fired room front-surface pressure regulator comprises a gas supply system, an experiment gas transmission pipeline, a control pipeline, a telescopic clamp system, an industrial personal computer, a primary pressure control device and a secondary pressure control device; the telescopic clamp system comprises an exhaust ball valve, a telescopic pipe, a measured pressure regulator and a flow controller which are connected in sequence; the primary pressure control device comprises a primary pressure regulating electric proportional pressure regulating valve and a primary main body throttling device; the secondary pressure control device comprises a secondary pressure regulating electric proportional pressure regulating valve, a secondary main body throttling device and a bypass pipeline; the industrial personal computer is connected with the first-stage pressure regulating proportional control valve and the second-stage proportional control valve through the analog quantity output module and the data/signal transmission line, so that the transmission of analog signals is realized, and the regulating valve is controlled through the size of analog quantity to control the output air pressure signals. The system has the advantages of large flow regulation range, high pressure control precision, small minimum flow, convenient installation and integration of gas supply, pressure regulation and display.
Description
Technical Field
The invention relates to the field of gas-room front-surface pressure regulators, in particular to a detection system and a test method suitable for a gas-room front-surface pressure regulator.
Background
With the rapid development of population in large and medium-sized cities in China, residential buildings gradually develop to high-rise buildings, and the additional gas pressure of vertical pipes of the high-rise buildings caused by the height difference is easy to cause insufficient or excessive gas supply pressure in rooms of users. And traditional civilian cooking utensils and water heater, the air feed pressure of front end should be in the scope of 1000 ~ 3000Pa, when surpassing this scope, can lead to burning unstability, and the thermal efficiency descends, forms the potential safety hazard when serious. Therefore, all indoor pressure regulating schemes are adopted by the majority of gas companies, indoor and outdoor pressure regulators are more and more widely used, and meanwhile, huge requirements are generated on relevant inspection equipment.
The indoor meter front pressure regulator has the characteristics of small flow and low pressure. In the testing process, along with the opening or closing of a downstream valve, the front end pressure of the air supply pressure of the tested pressure regulator cannot be ensured. Therefore, higher requirements are put on the pressure control system of the supplied air; in addition, the test system needs to be suitable for front-meter pressure regulators of different models, the experimental working condition is complex, the flow regulation range of the test system is required to be large, the precision is high, and the minimum flow is small; meanwhile, due to different interface forms and sizes of the front voltage regulators of different models, the tested voltage regulator is required to be easily disassembled and assembled by a test system.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a detection system for a front pressure regulator in a gas-fired room, which has a wide flow rate regulation range, a high pressure control accuracy, a small minimum flow rate, and a convenient installation, and can integrate gas supply, pressure regulation, and display.
Another object of the present invention is to provide a testing method of the above detection system for the gas-fired indoor front-meter pressure regulator.
As conceived above, the technical scheme of the invention is as follows: the utility model provides a detecting system suitable for pressure regulator before indoor table of gas, includes gas supply system and pipe-line system, and gas supply system comprises steady voltage buffer tank and compressor, and pipe-line system includes experiment gas transmission pipeline and control line two parts, its characterized in that: the device also comprises a telescopic clamp system, an industrial personal computer and a front pressure control system consisting of a primary pressure control device and a secondary pressure control device;
the telescopic clamp system comprises an exhaust ball valve, a telescopic pipe, a measured pressure regulator and a flow controller which are connected in sequence, and the cylinder drives the telescopic pipe to directly clamp the measured pressure regulator; pressure transmitters are respectively arranged on the connecting pipeline of the exhaust ball valve and the telescopic pipe and the pipeline of the measured pressure regulator connected with the flow controller, sealing parts are respectively arranged at two ends of the measured pressure regulator, and the sealing parts are connected with the air cylinder; the industrial personal computer is connected with the two pressure transmitters through the data acquisition module and the data/signal transmission line, so that the data signal is transmitted and displayed on a display screen of the industrial personal computer;
the primary pressure control device comprises a primary pressure regulating electric proportional pressure regulating valve and a primary main body throttling device, and the primary pressure regulating electric proportional pressure regulating valve is connected with the air cylinder;
the secondary pressure control device comprises a secondary pressure regulating electric proportional pressure regulating valve, a secondary main body throttling device and a bypass pipeline, and the secondary main body throttling device is connected with the bypass pipeline consisting of a ball valve;
the industrial personal computer is connected with the primary pressure regulating proportional regulating valve and the secondary proportional regulating valve through an analog quantity output module and a data/signal transmission line to realize the transmission of analog signals, and the regulating valve is controlled through the magnitude of analog quantity so as to control the output air pressure signal;
the experimental gas transmission pipeline is connected with a gas flowmeter through a stop valve from a pressure stabilizing buffer tank, then enters a primary pressure control device, is decompressed through the primary pressure control device, then enters a secondary pressure control device, enters a telescopic clamp system after being decompressed through the secondary pressure control, then enters a tested pressure regulator, and is discharged to the atmosphere from the tested pressure regulator through a flow control valve;
the control pipeline leads out pneumatic three elements, namely a filter, a pressure regulator and an oil atomizer from the pressure stabilizing buffer tank, the pneumatic three elements are divided into three pipelines, one pipeline enters the first-stage pressure regulating proportional regulating valve for pressure reduction and then enters the first-stage pressure regulating throttling device, the other pipeline enters the second-stage pressure regulating proportional regulating valve for pressure reduction and then enters the second-stage pressure regulating throttling device and the bypass pipeline, and the other pipeline enters the cylinder as a power air source to drive the movable sleeve to compress the pressure regulator to be measured.
And a manual exhaust valve is arranged on a pipeline connecting the secondary pressure control device and an exhaust ball valve in the telescopic clamp system, analog signals are input into the industrial personal computer through an encoder by the manual exhaust valve, and then the industrial personal computer processes the analog signals and then is connected with a flow controller in the telescopic clamp system through an analog output module and a data/signal transmission line.
The test method of the detection system suitable for the gas-chamber indoor meter front pressure regulator comprises the following steps:
① installation of front-meter voltage regulator in the test room:
connecting the tested pressure regulator with a telescopic clamp system to enable the tested pressure regulator to be smoothly clamped, and opening a pneumatic switch to enable an air cylinder to inflate to push a telescopic pipe to clamp the tested pressure regulator;
② setting of experimental pressure:
A. selecting a primary pressure control device or a secondary pressure control device according to the using conditions of the measured pressure regulator, opening a secondary pressure control bypass pipeline when the inlet pressure of the measured pressure regulator is greater than 50kPa, and closing the secondary pressure control bypass pipeline when the inlet pressure of the measured pressure regulator is 5-50 kPa;
B. switching the primary pressure control device and the secondary pressure control device, inputting the pressure required by the experiment into the touch screen, and automatically stabilizing the pressure by a feedback control program;
③ testing of voltage regulator performance:
shaking the manual exhaust valve to change the flow by using a flow controller, gradually increasing the flow to the maximum experimental flow Q, then gradually decreasing the flow to zero, selecting 5 flow increasing points, 4 flow decreasing points and 1 zero flow point, and recording the pressure value and the flow value of the points.
The gas flowmeter is connected with a temperature transmitter, a pressure transmitter and an industrial control unitThe gas flowmeter, the temperature transmitter and the pressure transmitter are connected with the gas flowmeter through the data acquisition module and the data/signal transmission line, so that the data signal is transmitted; the gas flowmeter converts the flow into the gas flow Q under the normal pressure according to the pressure collected by the pressure transmittermAnd the industrial personal computer converts the flow into the flow Q of the inlet gas temperature of the pressure regulator at 15 ℃ according to the temperature collected by the temperature transmitter according to the formula (1) and displays the flow Q on a display screen of the industrial personal computer.
The cylinder adopts a push-pull type cylinder.
The two ends of the measured pressure regulator are respectively provided with a sealing piece.
And a silencer is arranged at the output port of the measured pressure regulator.
Compared with the prior art, the invention has the advantages that:
in view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a testing device for a pressure regulator in front of an indoor meter, which has a large flow regulation range, high pressure control precision, small minimum flow, is convenient to install, and integrates air supply, pressure regulation and display.
1. The pressure control range is wide: the device adopts a two-stage pressure stabilizing method, and can detect the pressure regulator with the inlet pressure from 0.4MPa to 5 kPa.
2. The pressure control precision is high: the pressure control adopts a closed-loop electric-pressure signal pressure control method, so that the signal pressure input into the pressure stabilizing device is stable. The input pressure signal is balanced with the pressure signal collected at the rear end through a mechanical structure, and the opening of the valve port is controlled, so that the outlet pressure is controlled.
3. The operation and installation are quick: the scheme of compressing by the air cylinder is adopted, the problem that the joint of the detected pressure regulator is various in types is solved, and the work of installing a bolt or screwing threads is omitted. The pressure and the flow are controlled by adopting a touch screen and a manual exhaust valve, so that the device is convenient and quick.
Drawings
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the automatic pressure control principle of the present invention.
Wherein: 1-a compressor; 2-a pressure stabilizing buffer tank; 3-a gas flow meter; 4-a temperature transmitter; 5-a pressure transmitter; 6-first-stage pressure regulating proportional control valve; 7-a first-stage pressure regulating throttling device; 8-two-stage pressure regulating throttling device; 9-two-stage pressure regulating proportional control valve; 10-ball valve; 11-a ball valve; 12-manual exhaust valve; 13-a vent ball valve; 14-a pressure transmitter; 15-a telescopic tube; 16-a cylinder; 17-a seal; 18-the pressure regulator under test; 19-a pressure transmitter; 20-a flow controller; 21-a signal transmission line; 22-ball valve; 23-a silencer; 24-an industrial personal computer; 25-a stop valve; 26-a filter; 27-a voltage regulator; 28-oil atomizer.
Detailed Description
The invention is described in further detail below with reference to fig. 1.
As shown in fig. 1, the detection system suitable for the gas-chamber front-meter pressure regulator comprises a gas supply system and a pipeline system, wherein the gas supply system comprises a pressure-stabilizing buffer tank and a compressor, the pipeline system comprises an experiment gas pipeline and a control pipeline, and the detection system further comprises a telescopic clamp system, an industrial personal computer and a front-pressure control system consisting of a primary pressure control device and a secondary pressure control device.
The telescopic clamp system comprises an exhaust ball valve, a telescopic pipe, a measured pressure regulator and a flow controller which are connected in sequence, and the cylinder drives the telescopic pipe to directly clamp the measured pressure regulator; pressure transmitters are respectively arranged on the connecting pipeline of the exhaust ball valve and the telescopic pipe and the pipeline of the measured pressure regulator connected with the flow controller, sealing parts are respectively arranged at two ends of the measured pressure regulator, and the sealing parts are connected with the air cylinder; the industrial personal computer is connected with the two pressure transmitters through the PLC data acquisition module and the data/signal transmission line, so that data signals are transmitted and displayed on a display screen of the industrial personal computer.
A compressor 1 for providing an air source, wherein the compressor 1 compresses air and presses the air into a pressure stabilizing buffer tank 2, and the pressure stabilizing buffer tank 2 is communicated with two gas transmission pipelines; the experiment gas transmission pipeline provides a gas source for the experiment, and the control pipeline provides the gas source for the pressure control system and the cylinder. The control line passes through the shut-off valve into the pneumatic three elements, filter 26, pressure regulator 27 and mist 28. The filter 26 is used to clean the air supply and filter the water in the compressed air to prevent water from entering the device with the air. The pressure regulator 27 can stabilize the pressure of the air source, so that the air source is in a constant state, and the damage to hardware such as a valve or an actuator and the like due to sudden change of the air pressure of the air source can be reduced. The oil atomizer 28 can lubricate moving parts of the machine body, can lubricate parts which are inconvenient to be lubricated with lubricating oil, and prolongs the service life of the machine body. The control pipeline is divided into three paths through a pneumatic three element, and one path of the control pipeline enters a primary pressure regulating proportional regulating valve 6 for pressure reduction and then enters a primary pressure regulating throttling device 7; one path enters a secondary pressure regulating proportional regulating valve 9 for pressure reduction and then enters a secondary pressure regulating throttling device 8; one path enters the air cylinder 16 to be used as a power air source to drive the movable sleeve to tightly press the pressure regulator to be measured.
The experimental gas transmission pipeline is connected with the gas flowmeter 3 through a stop valve, then sequentially enters the first-stage pressure regulating throttling device 7, the second-stage pressure regulating throttling device 8 and the bypass pipeline 10, passes through the exhaust ball valve 13, the cylinder 16 drives the telescopic pipe 15 and the sealing piece 17 to compress the measured pressure regulator 18, and is exhausted into the atmosphere through the flow controller 20 and the silencer 23.
The front pressure control system is composed of a primary pressure control device and a secondary pressure control device. The primary pressure control device comprises a primary pressure regulating electric proportional pressure regulating valve and a primary main body throttling device, and the primary pressure regulating electric proportional pressure regulating valve is connected with the air cylinder; the second-stage pressure control device comprises a second-stage pressure regulating electric proportional pressure regulating valve, a second-stage main body throttling device and a bypass pipeline, the second-stage main body throttling device is connected with the bypass pipeline formed by the ball valve, when a pressure regulator with higher inlet pressure is tested, the bypass pipeline is opened to only use one-stage pressure regulation, and when a pressure regulator with lower inlet pressure is tested, the bypass pipeline is closed to use one-stage and second-stage pressure regulation. The two-stage pressure regulator can reduce the pressure to 5-50 kPa.
The primary electric proportional control valve is connected with the PLC data acquisition module of the industrial personal computer through a signal transmission line, 4-20mA current is input, the pressure of a 1MPa air source of the pressure buffer tank is reduced to 50-400kPa by adjusting the opening degree of the primary electric proportional control valve, and the pressure is input to the primary main body throttling device as a pressure signal. The downstream of the first-stage main body throttling device is connected with a signal pipe to input the pressure after pressure reduction into the second-stage main body throttling device, and the opening of the throttling device is adjusted according to the difference of two pressure signals, so that the pressure of the second-stage pressure regulator can be reduced to 50-400 kPa.
The industrial personal computer 24 is connected with the gas flowmeter 3 and the temperature transmitter 4 and the pressure transmitter 5 which are attached to the gas flowmeter through a PLC data acquisition module and a data/signal transmission line, so that data signals are transmitted. The gas flowmeter 3 converts the flow rate into a gas flow rate Q under normal pressure according to the pressure collected by the pressure transmitter 5m. The industrial personal computer converts the flow into the flow Q of the inlet gas temperature of the pressure regulator at 15 ℃ according to the temperature collected by the temperature transmitter 4 according to the formula (1), and the flow Q is displayed on a display screen of the industrial personal computer.
The industrial personal computer 24 is connected with the pressure transmitter 14 and the pressure transmitter 19 through a data acquisition module and a data/signal transmission line, so that data signals are transmitted and displayed on a display screen of the industrial personal computer.
The industrial personal computer 24 is connected with the first-stage pressure regulating proportional control valve 6 and the second-stage proportional control valve 7 through an analog output module and a data/signal transmission line, so that the transmission of analog signals is realized, and the control valves are controlled through the size of analog quantity so as to control the output air pressure signals.
The manual exhaust valve 12 inputs an analog signal into the industrial personal computer 24 through the encoder, and then the industrial personal computer processes the analog signal and then is connected with the flow controller 20 through the analog quantity output module and the data/signal transmission line to realize the transmission of the analog signal, and the opening of the flow controller is controlled through the size of the analog quantity so as to control the flow flowing through the measured pressure regulator 18. The manual vent valve 12 is primarily used to prevent leakage from the flow controller during use and to shut the valve off during testing of the closing pressure.
The test method of the detection system suitable for the gas-chamber indoor meter front pressure regulator comprises the following steps:
1. and (3) mounting a front voltage regulator of the indoor meter to be tested:
connecting the tested pressure regulator with a telescopic clamp system to enable the tested pressure regulator to be clamped smoothly, and opening a pneumatic switch to enable an air cylinder 16 to inflate to push a telescopic pipe 15 to clamp a tested pressure regulator 18;
2. setting of the Experimental pressure
(1) And selecting to use the primary control voltage or the secondary control voltage according to the using condition of the measured pressure regulator. When the inlet pressure of the measured pressure regulator is greater than 50kPa, the secondary pressure control bypass pipeline ball valve 10 is opened, the primary pressure regulating proportion regulating valve 6 keeps working, the secondary proportion regulating valve 7 is closed, and gas enters the measured pressure regulator through a bypass pipeline; when the inlet pressure of the measured pressure regulator is 5-50kPa, the secondary pressure control bypass pipeline ball valve 10 is closed, the primary pressure regulating proportional regulating valve 6 and the secondary pressure regulating valve 7 are kept working, and the gas enters the measured pressure regulator 18 through the primary pressure regulating throttling device 7 and the secondary pressure regulating throttling device 8.
(2) Selecting a primary pressure control program and a secondary pressure control program to obtain the minimum value P of the inlet pressure of the measured pressure regulator1minAnd the voltage is input into the touch screen and is automatically stabilized by a feedback control program.
3. Testing of voltage regulator performance
(1) The exhaust ball valve 13 is closed and the pipeline cut-off valve 25 is opened to allow gas to enter the pressure regulator to be measured. The automatic pressure stabilizing system is based on the input pressure set value P1The pressure adjustment is performed. After the air supply pressure stabilized to the inlet pressure of the pressure regulator, the test was started.
(2) Shaking the manual exhaust valve to change the flow rate using the flow controller 20, first gradually increasing to the maximum experimental flow rate QmaxAnd then gradually decreases to zero. Selecting 5 flow increasing points and 4 flow decreasing points, and recording their pressure values P2minSum flow rate value Qmin。
(3) Shaking the manual purge valve 12 closes the flow control 20 and manually slowly closes the ball valve 22. Recording the closing pressure value P2。
(4) Selecting a primary pressure control program and a secondary pressure control program to obtain an intermediate value P of the inlet pressure of the measured pressure regulator 181intAnd the voltage is input into the touch screen and is automatically stabilized by a feedback control program. Repeating the stepsStep (1), step (2) and step (3), 5 flow increasing points and 4 flow decreasing points are obtained, and pressure values P of the flow increasing points and the flow decreasing points are recorded2intSum flow rate value Qint。
(5) Selecting a primary pressure control program and a secondary pressure control program to measure the maximum value P of the inlet pressure of the pressure regulator 181maxAnd the voltage is input into the touch screen and is automatically stabilized by a feedback control program. Repeating the steps (1), (2) and (3) to obtain 5 flow increasing points and 4 flow decreasing points, and recording the pressure values P of the flow increasing points and the flow decreasing points2maxSum flow rate value Qmax。
(6) The line stop valve 25 is closed, the exhaust ball valve 13 is opened, the manual exhaust valve 12 is swung to open the flow rate monitor 20, and the ball valve 22 is opened. Allowing the gas to vent to the atmosphere. The air cylinder 16 is contracted by pressing the pneumatic switch to drive the telescopic pipe 15 to retract, and the tested pressure regulator is taken down.
(7) According to experimental data, the gas flow Q is taken as an X-axis independent variable, and the outlet pressure P of the measured pressure regulator2As a dependent variable of Y axis, a rectangular plane coordinate system is established to obtain P under different inlet pressures1min，P1int，P1maxThe outlet pressure P of the measured pressure regulator2And calculating the stabilized pressure accuracy AC, the closing pressure SG and the closing pressure zone level SZ of the measured pressure regulator along with the gas flow graph.
The pressure control scheme of the present invention is described in further detail below with reference to FIG. 2.
The control system belongs to a composite control system, and a feedforward path is added into a feedback control loop of the system to form a system combining feedforward control and feedback control. The secondary circuit contains disturbances outside the primary circuit (the closed loop of the regulator itself) within the secondary circuit. The secondary circuit directly selects the outlet pressure as a control variable to achieve a precise regulation of the outlet pressure.
The selection of the control law is an important link of system design. For the first-order pure lag link, the control law of the controller can be selected according to the ratio of the pure lag time to the time constant. And when the ratio is less than 0.2, selecting a P or PI control rule. And from the process characteristics: the P control rule can quickly overcome disturbance influence to stabilize the system, but residual difference exists; the PI control rule can eliminate the residual error and is widely applied; the PD control law is suitable for occasions with large control channel time constant or capacity lag, can improve the stability of the system and reduce the dynamic deviation, but is not suitable for systems with large pure lag and noisy or periodic disturbance of measurement signals; the PID control law introduces integration on the basis of proportional control, can eliminate residual difference, adds differential action, can improve the stability of the system, is suitable for occasions with larger time constant or capacity lag of a control channel and higher control requirements, but has more complex parameter setting.
In the invention, because the pressure control precision and stability are the most concerned indexes and larger interference factors exist in the system, the electric-air controller adopts PID control and is realized by PLC. The computer programming implements the algorithm as follows.
When e (k) <100,
u(k+1)＝u(k)+Kp×e(k)+Kp×T0/Ti×∑e(k)+Kp×Td/T0×(e(k)–e(k-1))；
when e is more than 100 (k) < CHEM >,
u(k+1)＝u(k)+Kp×e(k)+Kp×Td/T0×(e(k)–e(k-1))；
in order to improve the performance of the system, PID parameters are adjusted in real time according to the deviation value and the change speed of the deviation so as to adapt to the adjusting effect under different conditions.
When the system is in steady state, the pressure is maintained at the set point P1SAt which time pressure control is disabled. When the pressure deviation Δ P is equal to P1－P1SWhen the pressure is larger than a certain threshold value, the outlet pressure of the pipeline system is considered to be changed at the moment, and the pressure control takes effect. And the pressure controller adjusts the proportional control P (PI control) according to the size of the delta P until the delta P is smaller than a specified threshold value, and the pressure control is forbidden. The adjustment process is schematically shown in fig. 2. The threshold value determines the accuracy of the pressure control that the system can provide. In the range of 10kPa to 300kPa, the pressure precision is controlled within 1%, and the pressure control deviation is not more than 0.01kPa under the low pressure condition (less than or equal to 10 kPa).
Claims (6)
1. The utility model provides a detecting system suitable for pressure regulator before indoor table of gas, includes gas supply system and pipe-line system, and gas supply system comprises steady voltage buffer tank and compressor, and pipe-line system includes experiment gas transmission pipeline and control line two parts, its characterized in that: the device also comprises a telescopic clamp system, an industrial personal computer and a front pressure control system consisting of a primary pressure control device and a secondary pressure control device;
the telescopic clamp system comprises an exhaust ball valve, a telescopic pipe, a measured pressure regulator and a flow controller which are connected in sequence, and the cylinder drives the telescopic pipe to directly clamp the measured pressure regulator; pressure transmitters are respectively arranged on the connecting pipeline of the exhaust ball valve and the telescopic pipe and the pipeline of the measured pressure regulator connected with the flow controller, and the measured pressure regulator is connected with the cylinder; the industrial personal computer is connected with the two pressure transmitters through the data acquisition module and the data/signal transmission line, so that the data signal is transmitted and displayed on a display screen of the industrial personal computer;
the primary pressure control device comprises a primary pressure regulating electric proportional pressure regulating valve and a primary main body throttling device, and the primary pressure regulating electric proportional pressure regulating valve is connected with the air cylinder;
the secondary pressure control device comprises a secondary pressure regulating electric proportional pressure regulating valve, a secondary main body throttling device and a bypass pipeline, and the secondary main body throttling device is connected with the bypass pipeline consisting of a ball valve;
the industrial personal computer is connected with the primary pressure regulating proportional regulating valve and the secondary proportional regulating valve through an analog quantity output module and a data/signal transmission line to realize the transmission of analog signals, and the regulating valve is controlled through the magnitude of analog quantity so as to control the output air pressure signal;
the experimental gas transmission pipeline is connected with a gas flowmeter through a stop valve from a pressure stabilizing buffer tank, then enters a primary pressure control device, enters a secondary pressure control device after being subjected to pressure reduction by the primary pressure control device, enters a telescopic clamp system after being subjected to secondary pressure reduction, then enters a tested pressure regulator, and is discharged to the atmosphere from the tested pressure regulator through a flow control device;
the control pipeline leads out pneumatic three elements, namely a filter, a pressure regulator and an oil atomizer, from the pressure stabilizing buffer tank, the pneumatic three elements are divided into three pipelines, one pipeline enters the primary pressure regulating proportional regulating valve for pressure reduction and then enters the primary pressure regulating throttling device, the other pipeline enters the secondary pressure regulating proportional regulating valve for pressure reduction and then enters the secondary pressure regulating throttling device and the bypass pipeline, and the other pipeline enters the cylinder as a power air source to drive the movable sleeve to compress the pressure regulator to be measured;
and a manual exhaust valve is arranged on a pipeline connecting the secondary pressure control device and an exhaust ball valve in the telescopic clamp system, analog signals are input into the industrial personal computer through an encoder by the manual exhaust valve, and then the industrial personal computer processes the analog signals and then is connected with a flow controller in the telescopic clamp system through an analog output module and a data/signal transmission line.
2. A method for testing a detection system suitable for a front pressure regulator in a gas-fired indoor meter according to claim 1, characterized in that: the method comprises the following steps:
① installation of front-meter voltage regulator in the test room:
connecting the tested pressure regulator with a telescopic clamp system to enable the tested pressure regulator to be smoothly clamped, and opening a pneumatic switch to enable an air cylinder to inflate to push a telescopic pipe to clamp the tested pressure regulator;
② setting of experimental pressure:
A. selecting a primary pressure control device or a secondary pressure control device according to the using conditions of the measured pressure regulator, opening a secondary pressure control bypass pipeline when the inlet pressure of the measured pressure regulator is greater than 50kPa, and closing the secondary pressure control bypass pipeline when the inlet pressure of the measured pressure regulator is 5-50 kPa;
B. switching the primary pressure control device and the secondary pressure control device, inputting the pressure required by the experiment into the touch screen, and automatically stabilizing the pressure by a feedback control program;
③ testing of voltage regulator performance:
shaking the manual exhaust valve to change the flow by using a flow controller, gradually increasing the flow to the maximum experimental flow Q, then gradually decreasing the flow to zero, selecting 5 flow increasing points, 4 flow decreasing points and 1 zero flow point, and recording the pressure value and the flow value of the points.
3. The detection system for the front pressure regulator in the gas room is characterized in that: the gas flowmeter is connected with a temperature transmitter and a pressure transmitter, and the industrial personal computer is connected with the gas flowmeter and the temperature transmitter and the pressure transmitter attached to the gas flowmeter through a data acquisition module and a data/signal transmission line to realize the transmission of data signals; the gas flowmeter converts the flow into the gas flow Q under the normal pressure according to the pressure collected by the pressure transmittermAnd the industrial personal computer converts the flow into the flow Q of the inlet gas temperature of the pressure regulator at 15 ℃ according to the temperature collected by the temperature transmitter according to the formula (1) and displays the flow Q on a display screen of the industrial personal computer.
4. The detection system for the front pressure regulator in the gas room is characterized in that: the cylinder adopts a push-pull type cylinder.
5. The detection system for the front pressure regulator in the gas room is characterized in that: and two ends of the measured pressure regulator are respectively provided with a sealing piece, and the sealing pieces are connected with the cylinder.
6. The detection system for the front pressure regulator in the gas room is characterized in that: and a silencer is arranged at the output port of the measured pressure regulator.
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| CN201810993166.6A CN110873641A (en) | 2018-08-29 | 2018-08-29 | Detection system and test method suitable for gas-fired room front-surface pressure regulator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693276A (en) * | 2020-06-23 | 2020-09-22 | 四川凯德源科技有限公司 | High-efficiency pressure regulating box test method |
| CN113899399A (en) * | 2021-09-18 | 2022-01-07 | 深圳市宏智智能装备有限公司 | High-voltage regulator testing method for intelligent micro-pipe network ecological chain |
-
2018
- 2018-08-29 CN CN201810993166.6A patent/CN110873641A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693276A (en) * | 2020-06-23 | 2020-09-22 | 四川凯德源科技有限公司 | High-efficiency pressure regulating box test method |
| CN111693276B (en) * | 2020-06-23 | 2022-04-01 | 四川凯德源科技有限公司 | High-efficiency pressure regulating box test method |
| CN113899399A (en) * | 2021-09-18 | 2022-01-07 | 深圳市宏智智能装备有限公司 | High-voltage regulator testing method for intelligent micro-pipe network ecological chain |
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