Automatic valve performance detection device

Abstract

The present invention relates to an automatic detection device for valve performance, wherein a feedback rod is fixed on a valve push rod, a target block is fixed on the feedback rod, a base is fixed on the edge of a membrane chamber of a pneumatic actuator, and a laser displacement sensor is installed on the base; a positioner is fixed on a valve bracket, and the positioner is connected to a gas flow sensor; a pressure sensor is installed in a first interface of a membrane chamber three-way joint of the pneumatic actuator, a second interface of the membrane chamber three-way joint is connected to an upper cavity of the pneumatic actuator, a third interface of the membrane chamber three-way joint is connected to an air supply gas path, and a gas flow sensor is connected to the air supply gas path; a laser displacement sensor, a gas flow sensor and a pressure sensor are connected to an input and output port module, the input and output port module is connected to a PLC controller, the PLC controller is connected to a console integrated machine, and the PLC controller is connected to a positioner. The present invention can measure multiple parameters simultaneously and improve test efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of valve manufacturing, in particular to an automatic detection device for valve performance. Background Art

[0002] Valves include on-off valves and regulating valves. On-off valves need to detect the full stroke time and stroke opening of the valve, while regulating valves need to detect various valve performances (basic error, hysteresis, dead zone, etc.), full stroke, full stroke action time, starting pressure, gas consumption, etc. Valves must pass various performance tests before they can leave the factory. At present, one instrument is used to detect one function, and there is a lack of comprehensive testing equipment to detect all valve performances.

[0003] Testing multiple tables is costly, inefficient, and the data cannot be quickly summarized into a test report after the test. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a valve performance automatic detection device which can simultaneously test multiple signals, collect data in real time and automatically generate a test report.

[0005] According to the technical solution provided by the present invention, the automatic valve performance detection device comprises a test bench and a control console, on which a valve to be tested is installed, and the valve to be tested has a valve push rod, a valve bracket and a pneumatic actuator; a PLC controller, an input and output port module and a control console integrated machine are installed in the control console; and the device also comprises a positioner, a target block, a feedback rod, a laser displacement sensor, a gas flow sensor and a pressure sensor;

[0006] A feedback rod is fixed on the valve push rod, a target block is fixed on the feedback rod, a base is fixed on the edge of the membrane chamber of the pneumatic actuator, a laser displacement sensor is installed on the base, and the laser displacement sensor cooperates with the target block;

[0007] The positioner is fixed on the valve bracket, and the positioner is connected to the gas flow sensor through the gas path;

[0008] The pressure sensor is installed in the first interface of the membrane chamber three-way joint of the pneumatic actuator, the second interface of the membrane chamber three-way joint is connected to the upper chamber of the pneumatic actuator, the third interface of the membrane chamber three-way joint is connected to the air supply line, and the gas flow sensor is connected to the air supply line;

[0009] The laser displacement sensor, gas flow sensor and pressure sensor are connected to the input and output port module through signal lines, the input and output port module is connected to the PLC controller through signal lines, the PLC controller is connected to the console integrated machine through signal lines, and the PLC controller is also connected to the positioner through signal lines.

[0010] The feedback rod is arranged vertically to the valve push rod.

[0011] The laser displacement sensor is attracted to the base through a magnetic base.

[0012] The test bench includes a base, a handwheel, a latch, a left frame and a right frame; the left frame and the right frame are fixed on the upper surface of the base, a clamping shaft is installed on the left frame, a handwheel is fixed on the left end of the clamping shaft, a left flange of the test bench is fixed on the right end of the clamping shaft, a right flange of the test bench is fixed on the left end surface of the right frame, a latch is installed on the right frame, the left flange of the test bench presses the left flange of the valve to be tested, the right flange of the test bench presses the right flange of the valve to be tested, and the latch is inserted into the right flange connecting hole of the valve to be tested.

[0013] The console integrated machine is connected with a keyboard and a printer.

[0014] A silent wheel is mounted on the bottom of the console.

[0015] The present invention has the following advantages:

[0016] 1. The present invention has valve assembly and performance detection functions, the valve is quickly installed, multiple sensors are used, multiple parameters are measured at the same time, multiple items are tested, the cost of single measuring instruments is reduced, the test time is shortened, and the test efficiency is improved;

[0017] 2. The laser displacement sensor is used to measure the valve stroke, which changes the old measurement method of tape measure and visual inspection, improves the accuracy and meets the requirements of different stroke ranges; it is easy to install, saving time and effort;

[0018] 3. Use pressure sensors to measure air pressure, and use algorithms to measure valve parameters beyond national standards (such as valve starting pressure, valve packing friction, etc.);

[0019] 4. Use flow sensor to measure gas flow, and measure valve gas consumption and other parameters;

[0020] 5. This detection device performs real-time testing and real-time recording to ensure that the data is authentic and valid and to avoid human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the control console in the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the following will be combined with the attached examples of the present invention. Figure 1, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] A valve performance automatic detection device, comprising a test bench and a control console, wherein a valve to be tested 3 is installed on the test bench, and the valve to be tested 3 has a valve push rod 5, a valve bracket 6 and a pneumatic actuator 13; a PLC controller 15, an input and output port module 16 and a control console integrated machine 17 are installed in the control console; and the device also comprises a positioner 7, a target block 8, a feedback rod 9, a laser displacement sensor 10, a gas flow sensor 11 and a pressure sensor 12;

[0025] A feedback rod 9 is fixed on the valve push rod 5, a target block 8 is fixed on the feedback rod 9, a base is fixed on the edge of the membrane chamber of the pneumatic actuator 13, a laser displacement sensor 10 is installed on the base, and the laser displacement sensor 10 cooperates with the target block 8;

[0026] The positioner 7 is fixed on the valve bracket 6, and the positioner 7 is connected to the gas flow sensor 11 through the gas path;

[0027] The pressure sensor 12 is installed in the first interface of the membrane chamber three-way joint of the pneumatic actuator 13, the second interface of the membrane chamber three-way joint is connected to the upper cavity of the pneumatic actuator 13, the third interface of the membrane chamber three-way joint is connected to the gas supply line, and the gas flow sensor 11 is connected to the gas supply line;

[0028] The laser displacement sensor 10, gas flow sensor 11 and pressure sensor 12 are connected to the input-output port module 16 via signal lines, the input-output port module 16 is connected to the PLC controller 15 via signal lines, the PLC controller 15 is connected to the console all-in-one machine 17 via signal lines, and the PLC controller 15 is also connected to the positioner 7 via signal lines.

[0029] The feedback rod 9 and the valve push rod 5 are arranged vertically.

[0030] The laser displacement sensor 10 is attracted to the base through a magnetic base.

[0031] The test bench includes a base 1, a handwheel 2, a latch 4, a left frame 18 and a right frame 19; the left frame 18 and the right frame 19 are fixed on the upper surface of the base 1, a clamping shaft is installed on the left frame 18, the handwheel 2 is fixed on the left end of the clamping shaft, a left flange of the test bench is fixed on the right end of the clamping shaft, a right flange of the test bench is fixed on the left end surface of the right frame 19, and a latch 4 is installed on the right frame 19, the left flange of the test bench presses the left flange of the valve to be tested 3, the right flange of the test bench presses the right flange of the valve to be tested 3, and the latch 4 is inserted into the right flange connecting hole of the valve to be tested 3 to prevent the valve to be tested 3 from slipping and falling.

[0032] A keyboard 20 and a printer 21 are connected to the integrated console 17 .

[0033] A silent wheel 14 is installed at the bottom of the console.

[0034] In the present invention, the laser displacement sensor 10 measures the actual movement stroke value of the valve 3 to be tested. When the valve 3 to be tested is actuated, the push rod 5 drives the feedback rod 9 to move. The laser displacement sensor 10 measures the movement displacement of the feedback rod 9 and transmits the real-time data to the control console. The PLC controller 15 in the control console calculates the movement stroke of the valve 3 to be tested through an algorithm and displays it on the human-machine interface of the control console all-in-one 17.

[0035] The positioner 7 outputs an air source signal to the pneumatic actuator 13 to drive the valve 3 to be tested to move up and down. The pressure sensor 12 measures the pressure value of the pneumatic actuator 13. The pressure sensor 12 converts the pressure signal into a standard 4~20mA signal and sends it to the PLC controller 15 of the control console. The PLC controller 15 communicates with the monitoring software and displays the actual measured pressure value on the human-machine interface of the console all-in-one 17.

[0036] The gas flow sensor 11 is connected in series in the gas circuit between the positioner 7 and the pneumatic actuator 13 to measure the instantaneous gas flow in the gas circuit. The gas flow sensor 11 converts the instantaneous flow into a standard signal 4-20 mA and sends it to the PLC controller 15 of the control console. The PLC controller 15 communicates with the detection software and displays the actual measured flow value on the human-machine interface of the control console integrated machine 17. The PLC controller 15 calculates the instantaneous flow and the measurement time together to calculate the gas consumption and displays it on the human-machine interface of the control console integrated machine 17.

[0037] The console integrated machine 17 has an independent database that can store and access test data. In the detection software, a test report can be generated and historical test data can be retrieved. The detection software is installed in the console integrated machine 17. On the human-machine interface of the detection software, by touching the operation button, different screens can be switched, different test items can be selected, and parameters of different performances of the valve can be tested to obtain a performance test report of the valve 3 to be tested.

[0038] The working process and principle of the present invention are as follows:

[0039] First, follow Figure 1 Install the valve 3 to be tested between the left frame 18 and the right frame 19 of the test bench, install the positioner 7, the pressure sensor 12 and the gas flow sensor 11, install the laser displacement sensor 10 and the feedback rod 9. Connect the gas path between the positioner 7, the gas flow sensor 11 and the membrane chamber of the pneumatic actuator 13, and connect the signals of the positioner 7 and each sensor to the input and output interface module 16 of the console through cables.

[0040] Secondly, a given value is input into the detection software interface on the console all-in-one machine 17 to control the PLC controller 15 in the console chassis. The PLC controller 15 converts the given value into a corresponding current signal and outputs it to the positioner 7. The positioner 7 converts the input current signal into a corresponding gas signal and outputs it to the membrane chamber of the pneumatic actuator 13. The membrane chamber of the pneumatic actuator 13 converts the input gas pressure change into a thrust to drive the valve stem 5 to move. The valve stem 5 and the feedback rod 9 connected thereto perform a linear displacement movement up and down. The laser displacement sensor 10 measures the up and down displacement value of the feedback rod 9 in real time through the target block 8, and converts the displacement value into a standard current signal and then sends it to the PLC controller 15 of the console through a cable. The PLC controller 15 of the console performs data calculation processing on the displacement value and the given value, and sends the displacement value and the calculation result to the detection software interface on the console all-in-one machine 17 for display.

[0041] At the same time, the gas flow sensor 11 measures the gas flow value in the gas circuit in real time, and the gas flow sensor 11 converts the gas flow value into a corresponding current signal, and the current signal is sent to the PLC controller 15 in the control console through a cable. The PLC controller 15 processes and calculates the flow value current signal, and sends the calculation result to the detection software interface on the control console integrated machine 17 for display.

[0042] At the same time, the pressure sensor 12 measures the pressure value of the membrane chamber of the pneumatic actuator 13 in real time, and the pressure sensor 12 converts the pressure value into a current signal, and sends the current signal to the PLC controller 15 in the console chassis through a cable. The PLC controller 15 processes the current signal and performs data calculations, and sends the calculation results to the detection software interface on the console integrated machine 17 for display.

[0043] Finally, the detection software on the console all-in-one machine 17 displays data, queries data and performs report processing. Different test items can be selected on the interface of the detection software, and automatic or manual testing can be performed, and the results can be displayed in accordance with national standards. The detection software can be developed and customized according to the test items to meet different experimental requirements.

Claims

1. A valve performance automatic detection device, characterized by: It comprises a test bench and a control console. A valve to be tested (3) is installed on the test bench. The valve to be tested (3) comprises a valve push rod (5), a valve bracket (6) and a pneumatic actuator (13). A PLC controller (15), an input / output port module (16) and a control console integrated machine (17) are installed in the control console. The control console also comprises a positioner (7), a target block (8), a feedback rod (9), a laser displacement sensor (10), a gas flow sensor (11) and a pressure sensor (12). A feedback rod (9) is fixed on the valve push rod (5), a target block (8) is fixed on the feedback rod (9), a base is fixed on the edge of the membrane chamber of the pneumatic actuator (13), a laser displacement sensor (10) is installed on the base, and the laser displacement sensor (10) cooperates with the target block (8); The positioner (7) is fixed on the valve bracket (6), and the positioner (7) is connected to the gas flow sensor (11) through a gas path; The pressure sensor (12) is installed in a first interface of a membrane chamber three-way joint of a pneumatic actuator (13); a second interface of the membrane chamber three-way joint is connected to an upper chamber of the pneumatic actuator (13); a third interface of the membrane chamber three-way joint is connected to an air supply line; and the gas flow sensor (11) is connected to the air supply line; The laser displacement sensor (10), the gas flow sensor (11) and the pressure sensor (12) are connected to the input / output port module (16) via signal lines, the input / output port module (16) is connected to the PLC controller (15) via signal lines, the PLC controller (15) is connected to the console integrated machine (17) via signal lines, and the PLC controller (15) is also connected to the positioner (7) via signal lines.

2. The automatic valve performance detection device according to claim 1, characterized in that: The feedback rod (9) and the valve push rod (5) are arranged vertically.

3. The automatic valve performance detection device according to claim 1, characterized in that: The laser displacement sensor (10) is attracted to the base via a magnetic base.

4. The automatic valve performance detection device according to claim 1, characterized in that: The test bench comprises a base (1), a hand wheel (2), a latch (4), a left frame (18) and a right frame (19); the left frame (18) and the right frame (19) are fixed on the upper surface of the base (1); a clamping shaft is installed on the left frame (18); the hand wheel (2) is fixed to the left end of the clamping shaft; a left flange of the test bench is fixed to the right end of the clamping shaft; a right flange of the test bench is fixed to the left end surface of the right frame (19); the latch (4) is installed on the right frame (19); the left flange of the test bench presses the left flange of the valve to be tested (3); the right flange of the test bench presses the right flange of the valve to be tested (3); and the latch (4) is inserted into the right flange connection hole of the valve to be tested (3).

5. The automatic valve performance detection device according to claim 1, characterized in that: A keyboard (20) and a printer (21) are connected to the console all-in-one machine (17).

6. The automatic valve performance detection device according to claim 1, characterized in that: A silent wheel (14) is mounted on the bottom of the console.

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