CN113125145A - Gas valve testing device and testing method - Google Patents
Gas valve testing device and testing method Download PDFInfo
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- CN113125145A CN113125145A CN202110376073.0A CN202110376073A CN113125145A CN 113125145 A CN113125145 A CN 113125145A CN 202110376073 A CN202110376073 A CN 202110376073A CN 113125145 A CN113125145 A CN 113125145A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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Abstract
The invention is suitable for the technical field of gas valve detection, and provides a gas valve testing device and a testing method, wherein the testing device comprises a gas supply system, and the gas supply system comprises a low-pressure gas supply pipeline, a high-pressure gas supply pipeline, a gas source part and a first exhaust pipeline; wherein, be provided with low pressure gas pitcher and high-pressure gas pitcher respectively on low pressure air supply pipeline, the high-pressure air supply pipeline, the inlet end of low pressure gas pitcher, high-pressure gas pitcher and gas valve is provided with first pressure sensor, second pressure sensor and third pressure sensor respectively. According to the invention, on one hand, automatic measurement of low pressure/high pressure closing performance of the valve is realized; on the other hand, the gas is stored and then supplied to the gas valve, so that the fluctuation of the gas is reduced, and the stability of the gas pressure during gas supply is ensured; the realization is to the pressure monitoring of low pressure gas pitcher and high-pressure gas pitcher, closes the capability test for the valve and provides reliable low pressure/high pressure, the pressure value when the valve of being convenient for acquire the gas valve is closed to know whether qualified of the quality of gas valve.
Description
Technical Field
The invention relates to the technical field of gas valve detection, in particular to a gas valve testing device and a gas valve testing method.
Background
The gas self-closing valve for pipeline is installed on the pipeline of low-pressure gas system, is a gas safety protection product, and has the functions of automatic closing under pressure, overpressure and decompression and manual reset. When the conditions of air stopping, abnormal air supply, rubber tube falling and the like occur, the automatic closing can be realized without electricity or any external power, and the leakage is prevented.
The basic principle of the pipeline gas self-closing valve is that permanent magnetic materials are magnetized according to design requirements to manufacture a permanent memory multi-pole permanent magnetic linkage mechanism, changes of gas pressure parameters passing through the permanent magnetic linkage mechanism are identified, and when the gas pressure parameters exceed a safety set value, the valve is automatically closed, and a gas source is cut off.
In the prior art, the overpressure and underpressure performance test of the pipeline gas self-closing valve usually adopts a manual or semi-automatic test mode, and the following technical problems also exist: (1) the manual testing mode is adopted, so that the testing efficiency is low, and the labor cost is high; (2) the measuring equipment part adjusts the gas pressure regulating valve by an electric control valve to give different pressures to the valve, the measuring time is long, the operation is complex, and the performance of the pressure regulating valve is seriously depended; (3) partial equipment relies on setting for a plurality of intraductal pressures, makes the intraductal pressure just be in regulation pressure upper and lower scope, relies on switching over the pipeline to realize providing different pressures, can not accurately measure closing pressure, especially when carrying out the low pressure test, is difficult to guarantee the stability of pressure, and the measuring result is inaccurate.
Disclosure of Invention
In order to solve the technical problems of low gas valve testing efficiency, high labor cost, complex operation, unstable gas supply pressure, incapability of accurately measuring valve closing pressure and the like in the prior art, the first aspect of the invention provides a gas valve testing device, which comprises a gas supply system, wherein the gas supply system comprises a low-pressure gas supply pipeline, a high-pressure gas supply pipeline, a gas source part and a first exhaust pipeline, first ends of the low-pressure gas supply pipeline and the high-pressure gas supply pipeline are connected with the gas source part, second ends of the low-pressure gas supply pipeline and the high-pressure gas supply pipeline are connected with a gas inlet end of a gas valve, and a gas outlet end of the gas valve is connected with the first exhaust pipeline;
the low-pressure air supply pipeline is sequentially provided with a first pressure regulating valve, a first air inlet valve, a low-pressure air tank and a first control valve;
the high-pressure air supply pipeline is sequentially provided with a second pressure regulating valve, a second air inlet valve, a high-pressure air tank and a second control valve;
the gas inlet ends of the low-pressure gas tank, the high-pressure gas tank and the gas valve are respectively provided with a first pressure sensor, a second pressure sensor and a third pressure sensor;
and a first exhaust valve is arranged on the first exhaust pipe.
According to the invention, the gas supply system and the first exhaust pipeline which are connected with the gas valve are arranged, so that on one hand, the automatic measurement of the low-pressure closing performance of the gas valve and the high-pressure closing performance of the gas valve is realized; on the other hand, the gas is supplied to the gas valve after the gas is stored in the low-pressure gas tank and the high-pressure gas tank, so that the stability of gas pressure during gas supply is ensured, and the fluctuation of the gas is reduced; the first pressure sensor and the second pressure sensor are respectively arranged on the low-pressure gas tank and the high-pressure gas tank, so that the pressure monitoring of the low-pressure gas tank and the high-pressure gas tank is realized, and reliable low-pressure or high-pressure is provided for valve closing performance testing of a gas valve; in addition, set up third pressure sensor at the inlet end of gas valve, the accurate pressure value when acquireing the valve of gas valve and closing of being convenient for to know whether qualified of quality of gas valve.
Further, the low-pressure gas supply pipeline is connected with the first exhaust pipeline, and the first exhaust pipeline is connected with a pipeline which is located between the first control valve and the third pressure sensor.
According to the invention, the low-pressure gas supply pipeline is connected with the first exhaust pipeline, so that the pressure of the low-pressure gas tank can be automatically adjusted conveniently, and the pressure in the low-pressure gas tank can meet the pressure requirement of a gas valve low-pressure test.
Further, a first needle valve is arranged on the low-pressure gas supply pipeline and is positioned between the first gas inlet valve and a gas inlet of the low-pressure gas tank;
a second needle valve is arranged on the high-pressure gas supply pipeline and is positioned between the second gas inlet valve and a gas inlet of the high-pressure gas tank; and/or
And a third needle valve is arranged on the first exhaust pipeline.
According to the invention, the first needle valve is arranged on the low-pressure gas supply pipeline, and when the pressure of the low-pressure gas tank is low, the gas inlet speed of the low-pressure gas tank is adjusted through the first needle valve, so that the influence of gas source fluctuation on the detection of the first pressure value of the first pressure sensor of the low-pressure gas tank is avoided, and the detection accuracy of the first pressure value of the first pressure sensor is improved; on one hand, when the valve of the gas valve executes a high-pressure closing performance test, the speed of high-pressure gas inlet is adjusted, so that the influence of gas source fluctuation on the closing pressure of the valve is avoided, and accurate valve closing overpressure pressure is obtained; on the other hand, when the pressure of the high-pressure gas tank is low, the air inlet speed of the high-pressure gas tank is adjusted through the second needle valve, so that the influence of air source fluctuation on the detection of a second pressure value of a second pressure sensor of the high-pressure gas tank is avoided, and the detection accuracy of the second pressure value of the second pressure sensor is improved; on one hand, when the valve of the gas valve executes a low-pressure closing performance test, the speed of low-pressure exhaust is adjusted, so that the influence of air source fluctuation on the closing pressure of the valve is avoided, and accurate valve closing under-pressure is obtained; on the other hand, when the pressure of low pressure gas pitcher is high, adjust the admission speed of high pressure gas pitcher through the third needle valve to avoid the influence of the fluctuation of air supply to the detection of the first pressure value of the first pressure sensor of low pressure gas pitcher, improve the detection accuracy of the first pressure value of first pressure sensor.
Further, still include the second exhaust pipe way, the second exhaust pipe way with be located the gas outlet of high pressure gas pitcher with between the second control valve the high pressure gas supply pipe way links to each other, be provided with second discharge valve on the second exhaust pipe way.
According to the invention, the high-pressure gas supply pipeline is connected with the second gas exhaust pipeline, so that the pressure of the high-pressure gas tank can be automatically adjusted conveniently, and the pressure in the high-pressure gas tank can meet the pressure requirement of a gas valve high-pressure test.
Further, a fourth needle valve is arranged on the second exhaust pipeline.
According to the invention, the fourth needle valve is arranged on the second exhaust pipeline, and when the pressure of the high-pressure gas tank is high, the exhaust speed of the high-pressure gas tank is adjusted through the fourth needle valve, so that the influence of gas source fluctuation on the detection of the second pressure value of the second pressure sensor of the high-pressure gas tank is avoided, and the detection accuracy of the second pressure value of the second pressure sensor is improved.
Further, the gas valve testing device comprises a box body and at least one testing station, wherein the testing station is arranged on the box body, a clamp is arranged on the testing station, and the clamp is used for clamping the gas valve.
The clamp is arranged to clamp the gas valve, so that the gas valve does not need to be held by hands when being tested, and the labor intensity of an operator is reduced; in addition, set up at least one test station, improve the efficiency of software testing of gas valve.
Further, the clamp comprises a supporting seat, a positioning block and a clamping part, the supporting seat comprises a first supporting seat and a second supporting seat which are oppositely arranged, grooves are formed in the first supporting seat and the second supporting seat, and the grooves can be matched with a shell of the gas valve; the positioning block can be abutted against the first end face of the gas valve, a first gas flow pipeline is arranged in the positioning block, and the first gas flow pipeline can be communicated with one of the gas inlet end or the gas outlet end of the gas valve; the clamping part comprises a mounting seat, a driving part and a butt joint block, the fixed end of the driving part is connected with the mounting seat, the free end of the driving part is connected with the butt joint block, the butt joint block can be in butt joint with the second end of the gas valve, a second gas flow pipeline is arranged in the butt joint block, and the second gas flow pipeline can be communicated with the gas inlet end of the gas valve or the other one of the gas outlet ends.
Further, the test station still includes support and correlation type photoelectric sensor, the support sets up first supporting seat with between the second supporting seat, correlation type photoelectric sensor install in on the support for detect the opening or closing of the valve of gas valve.
The correlation type photoelectric sensor is arranged at the test station and used for automatically detecting the opening or closing of the valve of the gas valve, so that the automatic detection of the performance of the valve is realized.
A second aspect of the present invention provides a gas valve testing method applied to the gas valve testing apparatus described above, the method including the steps of:
controlling a valve of the gas valve to open;
detecting a first pressure value of the first pressure sensor on the low pressure gas tank;
judging the magnitude relation between the first pressure value and a first preset pressure value, if the first pressure value is larger than or equal to the first preset pressure value, performing a valve low-pressure closing performance test on the gas valve, otherwise, controlling and adjusting the first pressure value of the low-pressure gas tank;
judging whether the valve low-pressure closing performance test is qualified or not, and if so, further detecting a second pressure value of the second pressure sensor on the high-pressure gas tank;
and judging the magnitude relation between the second pressure value and a second preset pressure value and a third preset pressure value, if the second preset pressure value is not more than the second pressure value and is less than the third preset pressure value, carrying out a valve high-pressure closing performance test on the gas valve, otherwise, controlling and adjusting the second pressure value of the high-pressure gas tank.
According to the invention, by judging the first pressure value of the low-pressure gas tank, when the first pressure value meets the requirement, the valve low-pressure closing performance test is executed on the gas valve, otherwise, the first pressure value of the low-pressure gas tank is controlled and adjusted; after the low-pressure closing performance test is qualified, by judging a second pressure value of the high-pressure gas tank, when the second pressure value meets the requirement, performing the valve high-pressure closing performance test on the gas valve, otherwise, controlling and adjusting the second pressure value of the high-pressure gas tank; the automatic adjustment of low pressure or high pressure is realized, certain pressure is provided for the gas valve test, the accuracy of the gas valve test is improved, the automatic measurement of the low pressure closing performance or the high pressure closing performance of the valve of the gas valve is realized, the efficiency of the gas valve test is improved, and the burden of an operator is lightened.
Further, the step of performing the valve low-pressure closing performance test on the gas valve specifically includes the following steps:
controlling the first control valve to be opened to provide the first pressure value;
when the valve of the gas valve is detected to be in an open state, after a first preset time interval, controlling the first exhaust valve to be opened;
when the valve of the gas valve is detected to be in a closed state, collecting a pressure value of the third pressure sensor;
judging whether the pressure value of the third pressure sensor falls into a preset low-pressure range or not, if so, indicating that the valve low-pressure closing performance test of the gas valve is qualified, and controlling the first control valve to close and the first exhaust valve to close after a second preset time interval; and otherwise, the valve low-pressure closing performance test of the gas valve is unqualified.
According to the invention, when the low-pressure closing performance of the valve is tested, whether the gas valve is qualified or not and the low-pressure closing pressure value when the gas valve is unqualified can be known by judging whether the pressure value of the third pressure sensor falls into the preset low-pressure range or not.
Further, if the pressure value of the third pressure sensor is larger than the preset low-pressure range, it indicates that the gas valve is under-pressure and too high;
and if the pressure value of the third pressure sensor is smaller than the preset low-pressure range, indicating that the gas valve is too low in underpressure.
According to the invention, the pressure value of the third pressure sensor and the size of the preset low-pressure range are judged to determine whether the gas valve is under-pressure too high or under-pressure too low, and unqualified gas valves are classified as under-pressure too high or under-pressure too low, so that subsequent processing is facilitated.
Further, the step of performing the valve high pressure closing performance test on the gas valve specifically comprises the following steps:
controlling the second control valve to be opened to provide the second pressure value;
when the valve of the gas valve is detected to be in an open state, after a third preset time interval, controlling the second air inlet valve to be opened;
when the valve of the gas valve is detected to be in a closed state, collecting a pressure value of the third pressure sensor;
and judging whether the pressure value of the third pressure sensor falls into a preset high-pressure range, if so, indicating that the valve high-pressure closing performance test of the gas valve is qualified, and after a fourth preset time interval, controlling the second control valve to close and controlling the second air inlet valve to close, otherwise, indicating that the valve high-pressure closing performance test of the gas valve is unqualified.
According to the invention, when the high-pressure closing performance of the valve is tested, whether the gas valve is qualified or not and the high-pressure closing pressure value when the gas valve is unqualified can be known by judging whether the pressure value of the third pressure sensor falls into the preset high-pressure range or not.
Further, if the pressure value of the third pressure sensor is larger than the preset high-pressure range, the overpressure of the gas valve is over-high;
and if the pressure value of the third pressure sensor is smaller than the preset high-pressure range, indicating that the overpressure of the gas valve is too low.
According to the method, the overpressure value of the third pressure sensor and the preset high-pressure range are judged, the fact that the gas valve is over-high in overpressure or over-low in overpressure is determined, and unqualified gas valves are classified into over-high in overpressure or over-low in overpressure, so that subsequent processing is facilitated.
Further, the step of controlling and adjusting the first pressure value of the low-pressure gas tank is specifically as follows: controlling the first air inlet valve to be opened until the first pressure value is larger than or equal to the first preset pressure value, and controlling the first air inlet valve to be closed; and/or the presence of a gas in the gas,
the step of controlling and adjusting the second pressure value of the high-pressure gas tank specifically comprises the following steps: if the second pressure value is larger than or equal to the third preset pressure value, controlling a second exhaust valve of a second exhaust pipeline to be opened, and controlling the second exhaust valve to be closed until the second pressure value is smaller than the third preset pressure value;
and if the second pressure value is smaller than the second preset pressure value, controlling the second air inlet valve to be opened, and controlling the second air inlet valve to be closed until the second pressure value is larger than or equal to the second preset pressure value.
Further, the step of controlling the opening of the valve of the gas valve specifically comprises: and controlling the second control valve to be opened, and controlling the second control valve to be closed after the valve of the gas valve is opened.
According to the invention, the second control valve of the high-pressure gas supply pipeline is opened, so that the valve of the gas valve is opened to perform the low-pressure closing performance test, the labor burden of an operator is reduced, the opening control mode is simple, an additional operating device is not required to be added, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or in the description of the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a gas circuit diagram of a gas supply system in a gas valve testing device provided by the present invention;
FIG. 2 is a schematic structural diagram of a gas valve testing device provided by the present invention;
FIG. 3 is an enlarged, fragmentary view of the encircled portion of FIG. 2;
FIG. 4 is a schematic view showing a structure of a clamp portion in the gas valve testing apparatus according to the present invention;
FIG. 5 is a schematic flow chart of a gas valve testing method provided by the present invention;
FIG. 6 is a schematic flow chart of a portion of a test for low pressure valve closing performance of a gas valve in a gas valve testing method provided by the present invention;
FIG. 7 is a schematic flow chart of a portion of a gas valve high pressure shut-off performance test performed on a gas valve in a gas valve testing method provided by the present invention;
FIG. 8 is a schematic flow chart illustrating the control and regulation of a first pressure value of a low-pressure gas tank in the gas valve testing method provided by the invention;
FIG. 9 is a schematic flow chart illustrating the control and adjustment of a second pressure value of the high-pressure gas tank in the gas valve testing method provided by the invention;
description of reference numerals:
100-an air supply system;
110-low pressure gas supply line; 111-a first pressure regulating valve; 112-a first intake valve; 113-a low pressure gas tank; 114-a first control valve; 115-a first needle valve; 116-a first pressure transmitter;
120-high pressure gas supply line; 121-a second pressure regulating valve; 122-a second intake valve; 123-a high pressure gas tank; 124-a second control valve; 125-second needle valve; 126-a second pressure transmitter;
130-a gas source component; 131-a gas source; 132-a pressure relief valve;
140-a first exhaust line; 141-a first exhaust valve; 142-a third needle valve;
150-a second exhaust line; 151-second exhaust valve; 152-a fourth needle valve;
200-a gas valve; 201-a third pressure sensor;
300-a box body;
310-a test station; 301-display screen; 302-indicator light; 303-a button;
320-a clamp; 330-a support seat; 331-a first support; 332-a second support seat; 333-groove;
340-a positioning block; 341-a first gas flow conduit; 350-a clamping member; 351-a mounting seat; 352-a drive member; 353-a butting block; 354-a second gas flow conduit;
360-bracket; 370-correlation type photoelectric sensor;
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the invention. The particular examples set forth below are illustrative only and are not intended to be limiting.
Referring to fig. 1, a first aspect of the present invention provides a gas valve testing apparatus, including a gas supply system 100, where the gas supply system 100 includes a low pressure gas supply pipeline 110, a high pressure gas supply pipeline 120, a gas source unit 130, and a first exhaust pipeline 140, first ends of the low pressure gas supply pipeline 110 and the high pressure gas supply pipeline 120 are both connected to the gas source unit 130, second ends of the low pressure gas supply pipeline 110 and the high pressure gas supply pipeline 120 are both connected to a gas inlet end of a gas valve 200, and a gas outlet end of the gas valve 200 is connected to the first exhaust pipeline 140;
the low pressure gas supply pipeline 110 is provided with a first pressure regulating valve 111, a first gas inlet valve 112, a low pressure gas tank 113 and a first control valve 114 in sequence;
the high pressure air supply line 120 is provided with a second pressure regulating valve 121, a second air inlet valve 122, a high pressure air tank 123 and a second control valve 124 in sequence;
wherein, the air inlet ends of the low pressure air tank 113, the high pressure air tank 123 and the gas valve 200 are respectively provided with a first pressure sensor 116, a second pressure sensor 126 and a third pressure sensor 201;
the first exhaust pipe is provided with a first exhaust valve 141.
It should be noted that the low-pressure gas supply line 110 is used for supplying low-pressure gas for testing the gas valve 200, and the high-pressure gas supply line 120 is used for supplying high-pressure gas for testing the gas valve 200; the first pressure sensor 116 is used to detect the pressure of the low pressure gas tank 113, the second pressure sensor 126 is used to detect the pressure of the high pressure gas tank 123, and the third pressure sensor 201 is used to detect the pressure when the gas valve 200 is tested in the closed state.
The gas source 131 assembly includes a gas source 131 and a pressure relief valve 132, the pressure relief valve 132 having a compressed air oil water separator.
Therefore, the gas supply system 100 and the first exhaust pipeline 140 which are connected with the gas valve 200 are arranged, so that on one hand, the automatic measurement of the valve low-pressure closing performance of the gas valve 200 and the automatic measurement of the valve high-pressure closing performance of the gas valve 200 are realized; on the other hand, the gas is stored in the low-pressure gas tank 113 and the high-pressure gas tank 123, and then the gas is supplied to the gas valve 200, so that the stability of gas pressure during gas supply is ensured, and the fluctuation of the gas is reduced; the first pressure sensor 116 and the second pressure sensor 126 are respectively arranged on the low-pressure gas tank 113 and the high-pressure gas tank 123, so that the pressure monitoring of the low-pressure gas tank 113 and the high-pressure gas tank 123 is realized, and reliable low-pressure or high-pressure is provided for valve closing performance testing of the gas valve 200; in addition, set up third pressure sensor 201 at the inlet end of gas valve 200, the pressure value when the accurate valve that acquires gas valve 200 of being convenient for is closed to know whether the quality of gas valve 200 is qualified.
Preferably, referring to fig. 1, the low pressure gas supply line 110 is connected to a first gas exhaust line 140, the first gas exhaust line 140 is connected to a line connecting the first control valve 114 and the third pressure sensor 201, and the first gas exhaust line 140 is used for exhausting gas through the first gas exhaust line 140 to enable a first pressure value to meet the test requirement when the first pressure value of the first pressure sensor 116 of the low pressure gas tank 113 is high.
Therefore, the present invention facilitates automatic adjustment of the pressure of the low pressure gas tank 113 by connecting the low pressure gas supply line 110 to the first exhaust line 140, so that the pressure in the low pressure gas tank 113 meets the pressure requirement of the low pressure test of the gas valve 200.
Preferably, referring to fig. 1, the low pressure gas supply line 110 is provided with a first needle valve 115, the first needle valve 115 is located between the first gas inlet valve 112 and a gas inlet of the low pressure gas tank 113, and the first needle valve 115 is used for adjusting a gas inlet speed of the low pressure gas tank 113.
Therefore, the present invention improves the accuracy of detecting the first pressure value of the first pressure sensor 116 by providing the first needle valve 115 on the low pressure gas supply line 110, and adjusting the gas intake speed of the low pressure gas tank 113 through the first needle valve 115 when the pressure of the low pressure gas tank 113 is low, thereby avoiding the influence of the fluctuation of the gas source 131 on the detection of the first pressure value of the first pressure sensor 116 of the low pressure gas tank 113.
Preferably, referring to fig. 1, the high pressure gas supply line 120 is provided with a second needle valve 125, the second needle valve 125 is located between the second gas inlet valve 122 and the gas inlet of the high pressure gas tank 123, and the first needle valve 115 is used for adjusting the gas inlet speed of the high pressure gas tank 123.
It should be noted that the second needle valve 125 is used to raise the pressure of the high-pressure gas tank 123 by slow gas intake, so as to implement a high-pressure closing test of the valve of the gas valve 200.
Therefore, according to the present invention, by providing the second needle valve 125 on the high-pressure gas supply line 120, on one hand, when the valve of the gas valve 200 performs a high-pressure closing performance test, the high-pressure gas intake speed is adjusted, so as to avoid the influence of the fluctuation of the gas source 131 on the valve closing pressure, and obtain an accurate valve closing overpressure pressure; on the other hand, when the pressure of the high pressure gas tank 123 is low, the air intake speed of the high pressure gas tank 123 is adjusted by the second needle valve 125, so that the influence of the fluctuation of the air source 131 on the detection of the second pressure value of the second pressure sensor 126 of the high pressure gas tank 123 is avoided, and the detection accuracy of the second pressure value of the second pressure sensor 126 is improved.
Preferably, referring to fig. 1, a third needle valve 142 is provided on the first exhaust line 140, and the third needle valve 142 is used to adjust the exhaust speed.
It should be noted that the third needle valve 142 is used for reducing the pressure of the low-pressure gas tank 113 by slow exhaust, so as to realize the low-pressure closing test of the valve of the gas valve 200; or when the pressure of the low pressure gas tank 113 is high, the pressure of the low pressure gas tank 113 is lowered by slowly exhausting gas.
Therefore, according to the invention, the third needle valve 142 is arranged on the first exhaust pipeline 140, on one hand, when the valve of the gas valve 200 performs a low-pressure closing performance test, the speed of low-pressure exhaust is adjusted, so that the influence of the fluctuation of the gas source 131 on the closing pressure of the valve is avoided, and the accurate closing under-pressure of the valve is obtained; on the other hand, when the pressure of the low pressure gas tank 113 is high, the air intake speed of the high pressure gas tank 123 is adjusted by the third needle valve 142, so that the influence of the fluctuation of the air source 131 on the detection of the first pressure value of the first pressure sensor 116 of the low pressure gas tank 113 is avoided, and the detection accuracy of the first pressure value of the first pressure sensor 116 is improved.
Preferably, referring to fig. 1, a second exhaust pipeline 150 is further included, the second exhaust pipeline 150 is connected to the high-pressure gas supply pipeline 120 between the gas outlet of the high-pressure gas tank 123 and the second control valve 124, and a second exhaust valve 151 is disposed on the second exhaust pipeline 150.
It should be noted that the second exhaust pipeline 150 is configured to exhaust air through the second exhaust pipeline 150 to enable the second pressure value to meet the test requirement when the second pressure value of the second pressure sensor 126 of the high-pressure air tank 123 is high.
Therefore, the present invention facilitates automatic pressure adjustment of the high pressure gas tank 123 by connecting the high pressure gas supply line 120 with the second gas exhaust line 150, so that the pressure in the high pressure gas tank 123 meets the pressure requirement of the high pressure test of the gas valve 200.
Preferably, referring to fig. 1, the second exhaust line 150 is provided with a fourth needle valve 152, and the first needle valve 115 is used for adjusting the exhaust speed of the high pressure gas tank 123.
Therefore, according to the present invention, by providing the fourth needle valve 152 on the second exhaust pipeline 150, when the pressure of the high-pressure gas tank 123 is high, the exhaust speed of the high-pressure gas tank 123 is adjusted by the fourth needle valve 152, so as to avoid the influence of the fluctuation of the gas source 131 on the detection of the second pressure value of the second pressure sensor 126 of the high-pressure gas tank 123, and improve the accuracy of the detection of the second pressure value of the second pressure sensor 126.
Preferably, referring to fig. 2, the gas valve testing apparatus includes a case 300 and at least one testing station 310, the testing station 310 being disposed on the case 300, the testing station 310 being provided with a jig 320, the jig 320 being for holding the gas valve 200.
Therefore, the clamp 320 is arranged to clamp the gas valve 200, so that the gas valve 200 does not need to be held by hands when the gas valve 200 is tested, and the labor intensity of an operator is reduced; in addition, at least one test station 310 is provided to improve the efficiency of testing the gas valve 200.
Preferably, the gas valve testing device further includes a third control valve electrically connected to the jig 320.
Therefore, the present invention realizes the automatic clamping and releasing of the gas valve 200 by the clamp 320 by providing the third control valve electrically connected to the clamp 320.
Preferably, referring to fig. 3 and 4, the clamp 320 includes a support base 330, a positioning block 340 and a clamping member 350, the support base 330 includes a first support base 331 and a second support base 332, the first support base 331 and the second support base 332 are provided with a groove 333, and the groove 333 is capable of being matched with the housing of the gas valve 200; the positioning block 340 can be abutted against the first end face of the gas valve 200, a first gas flow pipeline 341 is arranged in the positioning block 340, and the first gas flow pipeline 341 can be communicated with one of the gas inlet end or the gas outlet end of the gas valve 200; the clamping member 350 comprises a mounting seat 351, a driving member 352 and an abutting block 353, wherein a fixed end of the driving member 352 is connected with the mounting seat 351, a free end of the driving member 352 is connected with the abutting block 353, the abutting block 353 can abut against a second end of the gas valve 200, a second gas flow pipeline 354 is arranged in the abutting block 353, and the second gas flow pipeline 354 can be communicated with the other one of the gas inlet end or the gas outlet end of the gas valve 200.
It should be noted that the driving member 352 may be a cylinder or an electric push rod.
Preferably, the testing station 310 further comprises a bracket 360 and a correlation type photoelectric sensor 370, wherein the bracket 360 is disposed between the first supporting seat 331 and the second supporting seat 332, and the correlation type photoelectric sensor 370 is mounted on the bracket 360 for detecting the opening or closing of the valve of the gas valve 200.
The opposite-type photosensor 370 may be a light-emitting diode opposite-type photosensor or a laser diode opposite-type photosensor.
Therefore, the present invention realizes the automatic detection of the valve performance by providing the correlation type photoelectric sensor 370 at the test station 310 for automatically detecting the opening or closing of the valve of the gas valve 200.
Preferably, referring to fig. 2, the gas valve testing apparatus further includes a display screen 301 and an indicator light 302 for displaying a test status of the gas valve 200.
Preferably, referring to fig. 2, the gas valve testing apparatus further comprises a button 303, the button 303 being used to control the start or stop of the test of the gas valve 200.
Preferably, the gas valve testing device further comprises a controller, and the first pressure regulating valve 111, the second pressure regulating valve 121, the first air inlet valve 112, the second air inlet valve 122, the first control valve 114, the second control valve 124, the third control valve, the first exhaust valve 141, the second exhaust valve 151, the first needle valve 115, the second needle valve 125, the third needle valve 142, the fourth needle valve 152, the first pressure sensor 116, the second pressure sensor 126, the third pressure sensor 201, the correlation type photoelectric sensor 370, the pressure reducing valve 132, the display screen 301, the indicator light 302 and the button 303 are all electrically connected with the controller.
The first pressure regulating valve 111, the second pressure regulating valve 121, the first intake valve 112, the second intake valve 122, the first control valve 114, the second control valve 124, the third control valve, the first exhaust valve 141, and the second exhaust valve 151 are solenoid valves.
Referring to fig. 5, a second aspect of the present invention provides a gas valve testing method applied to the above gas valve testing apparatus, the method comprising the steps of:
controlling the valve of the gas valve 200 to open;
detecting a first pressure value of the first pressure sensor 116 on the low pressure gas tank 113;
judging the magnitude relation between the first pressure value and a first preset pressure value, if the first pressure value is larger than or equal to the first preset pressure value, performing a valve low-pressure closing performance test on the fuel valve 200, otherwise, controlling and adjusting the first pressure value of the low-pressure gas tank 113;
judging whether the valve low-pressure closing performance test is qualified, if so, further detecting a second pressure value of a second pressure sensor 126 on the high-pressure gas tank 123;
and judging the magnitude relation between the second pressure value and the second preset pressure value and the third preset pressure value, if the second preset pressure value is not more than the second pressure value and is less than the third preset pressure value, performing a valve high-pressure closing performance test on the fuel valve 200, otherwise, controlling and adjusting the second pressure value of the high-pressure gas tank 123.
Therefore, according to the invention, by judging the first pressure value of the low-pressure gas tank 113, when the first pressure value meets the requirement, the valve low-pressure closing performance test is executed on the fuel valve 200, otherwise, the first pressure value of the low-pressure gas tank 113 is controlled and adjusted; after the low-pressure closing performance test is qualified, by judging a second pressure value of the high-pressure gas tank 123, when the second pressure value meets the requirement, performing a valve high-pressure closing performance test on the gas valve 200, otherwise, controlling and adjusting the second pressure value of the high-pressure gas tank 123; the automatic adjustment of low pressure or high pressure is realized, certain pressure is provided for the test of the gas valve 200, the test accuracy of the gas valve 200 is improved, the automatic measurement of the low-pressure closing performance or the high-pressure closing performance of the valve of the gas valve 200 is realized, the test efficiency of the gas valve 200 is improved, and the burden of an operator is lightened.
Preferably, referring to fig. 6, the step of performing the valve low pressure closing performance test on the gas valve 200 specifically includes the following steps:
controlling the first control valve 114 to open to provide a first pressure value;
when the valve of the gas valve 200 is detected to be in the open state, after a first preset time interval, the first exhaust valve 141 is controlled to be opened;
when the valve of the gas valve 200 is detected to be in a closed state, collecting a pressure value of a third pressure sensor 201;
judging whether the pressure value of the third pressure sensor 201 falls into a preset low-pressure range, if so, indicating that the valve low-pressure closing performance test of the gas valve 200 is qualified, and after a second preset time interval, controlling the first control valve 114 to close and controlling the first exhaust valve 141 to close; otherwise, the valve low-pressure closing performance test of the gas valve 200 is not qualified.
It should be noted that the value range of the first preset time is between 0.3s and 1s, and preferably, the value of the first preset time is 0.5 s; the value range of the second preset time is between 0.3s and 1s, and preferably, the value of the second preset time is 0.5 s.
Therefore, in the invention, by judging whether the pressure value of the third pressure sensor 201 falls within the preset low-pressure range or not when the valve low-pressure closing performance test is performed, whether the gas valve 200 is qualified or not and the low-pressure closing pressure value when the gas valve 200 is unqualified can be known.
Specifically, referring to fig. 6, the unqualified valve low-pressure closing performance test of the gas valve 200 includes an under-pressure over-high condition and an under-pressure over-low condition, and if the pressure value of the third pressure sensor 201 is greater than the preset low-pressure range, it indicates that the gas valve 200 is under-pressure over-high;
if the pressure value of the third pressure sensor 201 is smaller than the preset low-pressure range, it indicates that the gas valve 200 is under-pressure and too low.
Therefore, the invention determines whether the gas valve 200 is under-pressure too high or under-pressure too low by judging the pressure value of the third pressure sensor 201 and the preset low-pressure range, and classifies the unqualified gas valve 200 as under-pressure too high or under-pressure too low, thereby facilitating subsequent processing.
Preferably, when the gas valve 200 is under-pressure and too high, the gas valve 200 is put into the under-pressure and too high failing frame; when the gas valve 200 is under-pressure and too low, the gas valve 200 is put into an under-pressure and too low fail frame.
Preferably, referring to fig. 7, the step of performing the valve high pressure closing performance test on the gas valve 200 specifically includes the following steps:
controlling the second control valve 124 to open to provide a second pressure value;
when the valve of the gas valve 200 is detected to be in the open state, after a third preset time interval, controlling the second air inlet valve 122 to be opened;
when the valve of the gas valve 200 is detected to be in a closed state, collecting a pressure value of a third pressure sensor 201;
and judging whether the pressure value of the third pressure sensor 201 falls into a preset high-pressure range, if so, indicating that the valve high-pressure closing performance test of the gas valve 200 is qualified, and after a fourth preset time interval, controlling the second control valve 124 to close and controlling the second air inlet valve 122 to close, otherwise, indicating that the valve high-pressure closing performance test of the gas valve 200 is unqualified.
It should be noted that the value range of the third preset time is between 0.3s and 1s, and preferably, the value of the third preset time is 0.5 s; the value range of the fourth preset time is between 0.3s and 1s, and preferably, the value of the fourth preset time is 0.5 s.
Therefore, in the invention, when the valve high-pressure closing performance test is performed, whether the gas valve 200 is qualified or not and the high-pressure closing pressure value when the gas valve 200 is not qualified can be known by judging whether the pressure value of the third pressure sensor 201 falls within the preset high-pressure range or not.
Specifically, referring to fig. 7, the unqualified valve high-pressure closing performance test of the gas valve 200 includes overpressure too high and overpressure too low, and if the pressure value of the third pressure sensor 201 is greater than the preset high-pressure range, the overpressure too high of the gas valve 200 is indicated;
if the pressure value of the third pressure sensor 201 is less than the preset high pressure range, it indicates that the overpressure of the gas valve 200 is too low.
Therefore, the invention determines that the gas valve 200 is over-high overpressure or over-low overpressure by judging the pressure value of the third pressure sensor 201 and the preset high pressure range, and classifies the unqualified gas valve 200 as over-high overpressure or over-low overpressure, thereby facilitating subsequent processing.
Preferably, when the overpressure of the gas valve 200 is too high, the gas valve 200 is put into the frame which is not qualified when the overpressure is too high; when the overpressure of the gas valve 200 is too low, the gas valve 200 is placed in an overpressure too low fail box.
Preferably, referring to fig. 8, the step of controlling and adjusting the first pressure value of the low pressure gas tank 113 is specifically: and controlling the first air inlet valve 112 to open until the first pressure value is greater than or equal to the first preset pressure value, and controlling the first air inlet valve 112 to close.
The value range of the first preset pressure value is between 1.8kpa and 2.2kpa, and preferably, the value of the first preset pressure value is 2 kpa.
Preferably, referring to fig. 9, the step of controlling and adjusting the second pressure value of the high pressure gas tank 123 is specifically: if the second pressure value is greater than or equal to a third preset pressure value, controlling the second exhaust valve 151 to open, and controlling the second exhaust valve 151 to close until the second pressure value is less than the third preset pressure value;
and if the second pressure value is smaller than the second preset pressure value, controlling the second air inlet valve 122 to open, and controlling the second air inlet valve 122 to close until the second pressure value is larger than or equal to the second preset pressure value.
The value range of the second preset pressure value is between 4.5kpa and 5.5kpa, and preferably, the value of the second preset pressure value is 5 kpa; the value range of the third preset pressure value is between 6.3kpa and 7.7kpa, and preferably, the value of the second preset pressure value is 7 kpa.
It should be noted that the opening manner of the gas valve 200 may be: manually or by other mechanical hand or by gas supply through the high pressure gas supply line 120.
Preferably, the step of controlling the valve opening of the gas valve 200 is performed by: the second control valve 124 is controlled to be opened, and after the valve of the gas valve 200 is opened, the second control valve 124 is controlled to be closed.
Therefore, the second control valve 124 of the high-pressure gas supply pipeline 120 is opened, so that the valve of the gas valve 200 is opened to perform the low-pressure closing performance test, the labor burden of an operator is reduced, the opening control mode is simple, an additional operating device is not required to be added, and the cost is saved.
Preferably, if the gas valve 200 is not qualified, an alarm signal is sent out so that an operator can know that the gas valve 200 is not qualified and perform corresponding operation.
Preferably, if the valve low-pressure closing performance test of the gas valve 200 is qualified or the valve high-pressure closing performance test of the gas valve 200 is qualified, a qualified prompt signal is sent.
Preferably, the step of controlling the valve opening of the gas valve 200 is preceded by the steps of: the clamping member 350 is controlled to clamp the gas valve 200.
Preferably, the step of judging that the valve low-pressure closing performance test fails further comprises the following steps: controlling the clamping mechanism to release the detected gas valve 200; or after the step of performing the valve high pressure closing performance test on the gas valve 200, the method further comprises the following steps: the clamping member 350 is controlled to release the detected gas valve 200.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. The gas valve testing device is characterized by comprising a gas supply system (100), wherein the gas supply system (100) comprises a low-pressure gas supply pipeline (110), a high-pressure gas supply pipeline (120), a gas source part (130) and a first exhaust pipeline (140), first ends of the low-pressure gas supply pipeline (110) and the high-pressure gas supply pipeline (120) are connected with the gas source part (130), second ends of the low-pressure gas supply pipeline (110) and the high-pressure gas supply pipeline (120) are connected with a gas inlet end of a gas valve (200), and a gas outlet end of the gas valve (200) is connected with the first exhaust pipeline (140);
the low-pressure air supply pipeline (110) is sequentially provided with a first pressure regulating valve (111), a first air inlet valve (112), a low-pressure air tank (113) and a first control valve (114);
the high-pressure air supply pipeline (120) is sequentially provided with a second pressure regulating valve (121), a second air inlet valve (122), a high-pressure air tank (123) and a second control valve (124);
wherein the air inlet ends of the low-pressure air tank (113), the high-pressure air tank (123) and the gas valve (200) are respectively provided with a first pressure sensor (116), a second pressure sensor (126) and a third pressure sensor (201);
the first exhaust pipe is provided with a first exhaust valve (141).
2. Gas valve test unit according to claim 1, characterized in that the low pressure gas supply line (110) is connected to the first exhaust line (140), the first exhaust line (140) being connected to the line connecting the first control valve (114) and the third pressure sensor (201).
3. The gas valve testing device according to claim 1 or 2, characterized in that a first needle valve (115) is provided on the low pressure gas supply line (110), the first needle valve (115) being located between the first gas inlet valve (112) and an inlet of the low pressure gas tank (113);
a second needle valve (125) is arranged on the high-pressure air supply pipeline (120), and the second needle valve (125) is positioned between the second air inlet valve (122) and an air inlet of the high-pressure air tank (123); and/or
And a third needle valve (142) is arranged on the first exhaust pipeline (140).
4. The gas valve testing device according to claim 1, further comprising a second exhaust line (150), wherein the second exhaust line (150) is connected to the high-pressure gas supply line (120) between the outlet of the high-pressure gas tank (123) and the second control valve (124), and a second exhaust valve (151) is disposed on the second exhaust line (150).
5. The gas valve testing device according to claim 4, characterized in that a fourth needle valve (152) is provided on the second exhaust line (150).
6. Gas valve testing device according to claim 1, comprising a box (300) and at least one testing station (310), the testing station (310) being arranged on the box (300), the testing station (310) being provided with a clamp (320), the clamp (320) being adapted to clamp the gas valve (200).
7. The gas valve testing device according to claim 6, wherein the clamp (320) comprises a supporting seat (330), a positioning block (340) and a clamping component (350), the supporting seat (330) comprises a first supporting seat (331) and a second supporting seat (332) which are oppositely arranged, a groove (333) is arranged on the first supporting seat (331) and the second supporting seat (332), and the groove (333) can be matched with the shell of the gas valve (200); the positioning block (340) can be abutted against a first end face of the gas valve (200), a first gas flow pipeline (341) is arranged in the positioning block (340), and the first gas flow pipeline (341) can be communicated with one of a gas inlet end or a gas outlet end of the gas valve (200); the clamping component (350) comprises a mounting seat (351), a driving piece (352) and an abutting block (353), wherein the fixed end of the driving piece (352) is connected with the mounting seat (351), the free end of the driving piece (352) is connected with the abutting block (353), the abutting block (353) can abut against the second end of the gas valve (200), a second gas flow pipeline (354) is arranged in the abutting block (353), and the second gas flow pipeline (354) can be communicated with the other one of the gas inlet end or the gas outlet end of the gas valve (200).
8. The gas valve testing device according to claim 7, wherein the testing station (310) further comprises a holder (360) and a correlation type photo sensor (370), the holder (360) being disposed between the first support seat (331) and the second support seat (332), the correlation type photo sensor (370) being mounted on the holder (360) for detecting opening or closing of a valve of the gas valve (200).
9. A gas valve testing method, applied to the gas valve testing apparatus of any one of claims 1 to 8, comprising the steps of:
controlling a valve opening of the gas valve (200);
detecting a first pressure value of the first pressure sensor (116) on the low pressure gas tank (113);
judging the magnitude relation between the first pressure value and a first preset pressure value, if the first pressure value is larger than or equal to the first preset pressure value, performing a valve low-pressure closing performance test on the gas valve (200), otherwise, controlling and adjusting the first pressure value of the low-pressure gas tank (113);
judging whether the valve low-pressure closing performance test is qualified, and if so, further detecting a second pressure value of the second pressure sensor (126) on the high-pressure gas tank (123);
and judging the magnitude relation between the second pressure value and a second preset pressure value and a third preset pressure value, if the second preset pressure value is not more than the second pressure value and is less than the third preset pressure value, executing a valve high-pressure closing performance test on the gas valve (200), otherwise, controlling and adjusting the second pressure value of the high-pressure gas tank (123).
10. A gas valve testing method as claimed in claim 9, characterized in that said step of performing a valve low pressure closure performance test on said gas valve (200) comprises in particular the steps of:
controlling the first control valve (114) to open, providing the first pressure value;
when the valve of the gas valve (200) is detected to be in an open state, after a first preset time interval, controlling the first exhaust valve (141) to be opened;
when the valve of the gas valve (200) is detected to be in a closed state, collecting the pressure value of the third pressure sensor (201);
judging whether the pressure value of the third pressure sensor (201) falls into a preset low-pressure range or not, if so, indicating that the valve low-pressure closing performance test of the gas valve (200) is qualified, and controlling the first control valve (114) to close and the first exhaust valve (141) to close after a second preset time interval; otherwise, the valve low-pressure closing performance test of the gas valve (200) is not qualified.
11. The gas valve testing method as claimed in claim 10, characterized in that if the pressure value of the third pressure sensor (201) is greater than the preset low pressure range, it indicates that the gas valve (200) is under-pressure and too high;
if the pressure value of the third pressure sensor (201) is smaller than the preset low-pressure range, the gas valve (200) is indicated to be undervoltage and too low.
12. A gas valve test method as claimed in claim 9, characterized in that said step of performing a valve high pressure closing performance test on said gas valve (200) comprises in particular the steps of:
controlling the second control valve (124) to open, providing the second pressure value;
when the valve of the gas valve (200) is detected to be in an open state, after a third preset time interval, controlling the second air inlet valve (122) to be opened;
when the valve of the gas valve (200) is detected to be in a closed state, collecting the pressure value of the third pressure sensor (201);
and judging whether the pressure value of the third pressure sensor (201) falls into a preset high-pressure range, if so, indicating that the valve high-pressure closing performance test of the gas valve (200) is qualified, and after a fourth preset time interval, controlling the second control valve (124) to close and controlling the second gas inlet valve (122) to close, otherwise, indicating that the valve high-pressure closing performance test of the gas valve (200) is unqualified.
13. A gas valve testing method according to claim 12, characterized in that if the pressure value of the third pressure sensor (201) is > the preset high pressure range, it indicates that the gas valve (200) is overpressured;
if the pressure value of the third pressure sensor (201) is smaller than the preset high-pressure range, the overpressure of the gas valve (200) is too low.
14. The gas valve testing method as claimed in claim 9, characterized in that said step of controlling the regulation of the first pressure value of the low pressure gas tank (113) is embodied as: controlling the first air inlet valve (112) to be opened until the first pressure value is larger than or equal to the first preset pressure value, and controlling the first air inlet valve (112) to be closed; and/or the presence of a gas in the gas,
the step of controlling and adjusting the second pressure value of the high-pressure gas tank (123) is specifically as follows: if the second pressure value is larger than or equal to the third preset pressure value, controlling a second exhaust valve (151) of a second exhaust pipeline (150) to be opened, and controlling the second exhaust valve (151) to be closed until the second pressure value is smaller than the third preset pressure value;
and if the second pressure value is smaller than the second preset pressure value, controlling the second air inlet valve (122) to open, and controlling the second air inlet valve (122) to close until the second pressure value is larger than or equal to the second preset pressure value.
15. A gas valve test method as claimed in claim 9, characterized in that the step of controlling the valve opening of the gas valve (200) is in particular: and controlling the second control valve (124) to be opened, and controlling the second control valve (124) to be closed after the valve of the gas valve (200) is opened.
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