CN117664471A - Main regulating valve assembly testing equipment and testing method - Google Patents
Main regulating valve assembly testing equipment and testing method Download PDFInfo
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- CN117664471A CN117664471A CN202311678122.1A CN202311678122A CN117664471A CN 117664471 A CN117664471 A CN 117664471A CN 202311678122 A CN202311678122 A CN 202311678122A CN 117664471 A CN117664471 A CN 117664471A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a testing technology of a valve assembly, in particular to a testing device and a testing method of a main regulating valve assembly, which aim at the simulation working environment requirement of the main regulating valve assembly to perform standard testing of various important performance indexes of the main regulating valve assembly and complete pressure configuration adjustment of the main regulating valve assembly through customized verification equipment and a verification gas circuit system; the device comprises an operation table, wherein an input gas port, an output gas port and a pre-control output gas port are respectively arranged on the operation table, a plurality of clamping cylinders are also respectively arranged on the operation table, and clamping arms are arranged at the telescopic ends of the clamping cylinders; the air channel control system comprises a total air source, and one path of the total air source is communicated with the corresponding clamping cylinder through an electromagnetic valve A1 and an electromagnetic valve A2 respectively; one path of the total air source is communicated with the input air passage after passing through the pressure regulating valve R1, the pressure gauge M1, the cut-off plug valve H1, the air storage cylinder, the cut-off plug valve H2, the cut-off plug valve H3 and the pressure sensor AUS.
Description
Technical Field
The invention relates to a testing technology of a valve assembly, in particular to testing equipment and a testing method of a main regulating valve assembly.
Background
The main regulating valve assembly is used in a brake system of a urban rail transit vehicle, is used for brake control and flow amplification, has the function of electronic weighing after being assembled with an air charging and discharging electromagnetic valve, and has the following functions to be completed as shown in a gas circuit schematic diagram of the main regulating valve as shown in fig. 1: the pressure adjustment is carried out by adjusting the main regulating valve C1, namely, the pressure value Pe1 is set by adjusting an adjusting bolt on the main regulating valve C1; the adjusting method comprises the following steps: the adjusting bolt is rotated clockwise, and the value of the outlet pressure PV1 of the port 2 is increased; the adjusting bolt is rotated anticlockwise, and the outlet pressure PV1 of the port 2 is reduced; the pressure of PV1 is reduced for a plurality of times through the stopper, then the stopper is closed, when the pressure value is stable, the pressure PV1 value is Pe1+/-10 kPa, then the pressure regulating valve C2 is required to be regulated, and the pressure Pe2 is set by regulating the regulating bolt on the regulating valve.
The adjusting method comprises the following steps: solenoid valve A5 and solenoid valve A6 are energized. The adjusting bolt is rotated clockwise, and the value of the outlet pressure sensor PV1 is increased; the adjusting bolt is rotated anticlockwise, and the value of the outlet pressure sensor PV1 is reduced; then the electromagnetic valve A6 is powered off, part of pressure air at the outlet end of the pressure regulating valve is discharged, then the electromagnetic valve A6 is powered on, and the value when the outlet pressure sensor PV1 is stable is seen. The adjustment is repeated according to the above method until the outlet pressure PV1 has a value of Pe2.+ -.10 kPa.
In order to check the functions of the main regulating valve described above, the following tests are generally required: including output characteristic tests, leakage tests, unidirectional function tests, etc., the prior art currently lacks testing equipment and testing methods for the main regulator valve.
Disclosure of Invention
In order to solve the problem, the invention provides a main regulating valve assembly test device and a test method, which are used for carrying out standard tests on various important performance indexes of the main regulating valve assembly according to the simulation working environment requirement of the main regulating valve assembly and completing pressure configuration adjustment of the main regulating valve assembly through customized verification equipment and verification gas circuit systems.
In order to solve the technical problems, the invention adopts the following technical scheme: the main regulating valve assembly testing equipment comprises an operation table, wherein an input gas outlet port, an output gas outlet port and a pre-control output gas outlet port are respectively arranged on the operation table, a plurality of clamping cylinders are also respectively arranged on the operation table, and clamping arms are arranged at the telescopic ends of the clamping cylinders;
the air channel control system comprises a total air source, and one path of the total air source is communicated with the corresponding clamping cylinder through an electromagnetic valve A1 and an electromagnetic valve A2 respectively;
one path of the total air source is communicated with an input air port (2) after passing through a pressure regulating valve R1, a pressure gauge M1, a cut-off plug valve H1, an air storage cylinder, a cut-off plug valve H2, a cut-off plug valve H3 and a pressure sensor AUS;
one path of the total air source is communicated with a pre-control output air passage after passing through a pressure regulating valve R2, a pressure gauge M2, a cut-off plug valve H7, a cut-off plug valve H6 and a pressure sensor PV 3;
the output gas circuit port is communicated with the load air cylinder after passing through the pressure sensor PV1 and the cut-off plug valve H4.
Preferably, a cut-off plug H5 is further arranged between the cut-off plug H2 and the cut-off plug H3, and the cut-off plug H5 is respectively communicated with the one-way throttle valve TJ1 and the cut-off plug H8.
Preferably, the load reservoir is also connected to a pressure sensor PV2 via a pressure gauge M3.
In order to solve the technical problems, the invention adopts the following technical scheme: a testing method of a main regulating valve assembly comprises the following steps,
placing a main regulating valve assembly on an operation table, and enabling 4-port pre-control output of the main regulating valve assembly to be communicated with a pre-control output gas port on the operation table, wherein 2-port output of the main regulating valve assembly is communicated with an output gas port on the operation table, and 1-port input of the main regulating valve assembly is communicated with an input gas port on the operation table;
step two, opening the electromagnetic valve A1 and the electromagnetic valve A2, and supplying air to the corresponding clamping air cylinders through a total air source, so that the clamping air cylinders drive the clamping arms to move, and the main regulating valve assembly on the operating platform is clamped;
step three, performing an output characteristic test of the main regulating valve assembly, wherein the output characteristic test of the main regulating valve assembly is used for testing the characteristic that the pressure of the main regulating valve assembly changes along with the change of the pre-control pressure;
specifically, the electromagnetic valves A5 and A6 are powered on, the pressure of the pre-control pressure sensor PV3 is increased, and when the pressure exceeds the preset Pe1 pressure, the measured value of PV2 is increased; when the electromagnetic valve A5 is powered off, the pressure is maintained in a pre-control pressure section; when the electromagnetic valve A5 is powered on and the electromagnetic valve A6 is powered off, the pre-control air channel is exhausted, the pressure value of the PV3 is reduced, the pressure of the outlet end PV2 is reduced, and when the pressure of the PV2 tends to the preset Pe1 pressure, the pressure value of the PV2 is not reduced;
recording the process of increasing and decreasing the pressure values of PV3 and PV 2;
according to the above pressure adjustment method, pe2=450 kpa±10kPa, pe1=250 kpa±10kPa is set;
before the test starts, the pipeline pressure is 0, and all the cut-off plugs are in a closed state;
the test process comprises the following steps:
1) The cut-off plug door H6 is closed; simultaneously closing the cut-off plug door H2, opening the cut-off plug door H1 and the cut-off plug door H4, setting the pressure value of the pressure regulating valve R1 to 900 kPa+/-10 kPa, then opening the cut-off plug door H2 and the cut-off plug door H3, wherein the output pressure of the PV2 is Pe1, and the electromagnetic valve A5 and the electromagnetic valve A6 are in a power-off state; closing and opening the cut-off plug door H4 three times, and recording the value of the pressure regulating valve R1 and the value A1 of the Pe1 at the moment after stabilizing for 10 seconds;
2) Firstly, the electromagnetic valve A5 is powered on, then the electromagnetic valve A6 is powered on, after the power on lasts for 20 seconds, the pressure value B1 of the pressure sensor PV2 and the pressure value B2 of the sensor PV3 at the moment are recorded, the difference value B1-B2 is calculated,
3) The electromagnetic valve A6 is powered off, the pressure of the sensor PV3 starts to continuously decrease, the pressure value of the sensor PV2 is decreased, the pressure value A2 of the sensor PV2 is recorded 20s after the sensor PV2 starts to decrease, and a difference value A2-A1 is calculated;
4) If the A2 value of the step 3) is not satisfactory, the main regulating valve in the assembly is considered to be disqualified;
5) In the pressure curves recorded in the test processes 1) to 3), the time from 0 to 405kPa of the rising of the PV3 value of the pre-control sensor is between 5 and 7.2s, and the time from the highest point to 45kPa of the PV3 value is between 7 and 10 s;
step four, performing leakage test of the main regulating valve assembly, and performing leakage test in the test step following the step three:
1) Powering the electromagnetic valve A6 until the PV2 pressure value is stable;
2) The electromagnetic valve A5 is powered off, and then the electromagnetic valve A6 is powered off, so that the control pressure is in a pressure maintaining state;
3) Closing the blocking door H4, and emptying a 6L air cylinder load;
4) Closing the blocking doors H3 and H2, opening the blocking doors H5 and H8, cutting off the air supply and discharging the pressure in the middle section of the pipeline;
5) After the pressure is stabilized for 20 seconds, observing the pressure values of the pressure sensors PV1, PV3 and AUS, wherein the pressure value change of the pressure sensors PV1 and PV3 in 1min is not more than 5kPa; the pressure value of AUS should not vary by more than 6kPa;
step five, carrying out unidirectional function test on the main regulating valve assembly, and carrying out unidirectional function test on the main regulating valve assembly in the test step following the step four:
1) The electromagnetic valve A5 is powered on, and the pre-control pressure is emptied, so that PV3 is 0kPa;
2) Closing the blocking door H8, opening the blocking door H3, and slowly opening the one-way throttle valve TJ1, wherein the blocking door H2 is in a closed state, and the blocking door H5 is in an open state at the moment, so that the pressure value of the pressure sensor AUS is reduced;
3) When the pressure value of the pressure sensor AUS is reduced to be lower than the pressure value of the pressure sensor PV1, observing the pressure value of the pressure sensor PV1, and when the pressure value of the pressure sensor PV1 begins to be reduced, recording the pressure value of the pressure sensor PV1 and the pressure value of the pressure sensor AUS at the moment, wherein the difference value between PV1 and AUS is between 0 and 65 kPa;
step six, according to the pressure adjusting method in the step three, setting the pressure values of the main regulating valve C1 and the pressure regulating valve C2, ensuring that the value of the pressure sensor PV2 at the outlet meets the requirements of Pe1 and Pe2, and evacuating air in the pipeline after setting is completed, so as to complete the test.
Preferably, the difference B1-B2 in the third step should be maintained at 20-35 KPa or 5-20 KPa.
Preferably, the difference A2-A1 in the third step should be maintained at-10 to 40KPa or 20 to 70KPa.
The invention has the beneficial effects that: the main regulating valve assembly testing equipment and the testing method are characterized in that the design of the structure customization and verification method of special testing equipment is carried out on the pressure regulating characteristic and the internal structure design of the main regulating valve assembly, the installation and use environment of the main regulating valve assembly is simulated, the stable gas supply of an input gas port is carried out, the pressure regulation setting of the main regulating valve assembly is completed through the pressure feedback and the measurement of an output gas port and a pre-control output gas port, the output characteristic test, the leakage test and the unidirectional function test are respectively carried out on the main regulating valve assembly after the regulation setting are completed, and the verification of the main regulating valve assembly is formed into corresponding specifications through the standardized design and flow.
Drawings
FIG. 1 is a schematic diagram of the gas circuit of a main regulator valve;
FIG. 2 is a schematic structural view of a main regulator valve assembly test apparatus of the present invention;
FIG. 3 is a schematic illustration of a partial construction of a main regulator valve assembly test apparatus of the present invention;
FIG. 4 is a schematic diagram showing a part of a main regulator valve assembly test apparatus according to the present invention;
FIG. 5 is a schematic air circuit diagram of the main regulator valve assembly test apparatus of the present invention;
FIG. 6 is a partial view of the gas circuit principle of the main regulator valve assembly test apparatus of the present invention;
FIG. 7 is a partial view of the air circuit principle of the main regulator valve assembly test apparatus of the present invention;
FIG. 8 is a schematic diagram of an experimental operator interface according to the present invention;
FIG. 9 is a pressure curve page diagram of the present invention;
fig. 10 is a schematic diagram of statistical form data and curve data.
Description of the drawings: 1. an operation table; 2. inputting an air port; 3. an output gas outlet port; 4. pre-controlling an output gas outlet port; 5. a clamping cylinder; 6. a clamp arm; 7. a main regulator valve assembly.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention. The main regulating valve assembly is used in a brake system of a urban rail transit vehicle, is used for brake control and flow amplification, and has an electronic weighing function after being provided with an air charging and discharging electromagnetic valve; the design of the invention is used for routine testing after the assembly of the main regulating valve assembly is completed, and the standard requirements are formed by standardized design and flow to verify the main regulating valve assembly, and the main regulating valve assembly takes the model numbers TKQ602-BC01-02-03, TKD605A-BC01-01-00 and TKQ600RL06 as examples;
after the main regulator valve assembly (TKQ 600RL04 or TKQ600RL 04A), the main regulator valve connecting plate (TKQ 600SE 22), and the pressure reducing valve (TKQ 600RD 03) are assembled, the solenoid valve A5 (TKQ 600MG13 or TKQ600MG 13A) and the solenoid valve A6 (TKQ 600MG09 or TKQ600MG 09A) are installed to the corresponding positions as described in fig. 5 according to the drawing sheet requirements. TKQ600RL06 is integrated product, need not the equipment, tests after the installation solenoid valve. The assembly time is necessary to check whether the sealing element is assembled completely, and the working voltage of the electromagnetic valve is DC24V.
When the test is performed, the pressure of the supplied compressed air of the total air source is not less than 1000kPa, and the test equipment is provided with the cut-off plugs H1, H2, H3, H4, H5, H6, H7 and H8; pressure regulating valves R1 and R2; three M1-3, grade 0.4 or above of the pressure gauge; one-way throttle valve TJ1; a reservoir 40L; a load reservoir 6L;
as shown in fig. 2 to 7, the main regulating valve assembly testing equipment comprises an operation table 1, wherein an input air port 2, an output air port 3 and a pre-control output air port 4 are respectively arranged on the operation table 1, a plurality of clamping cylinders 5 are respectively arranged on the operation table 1, and clamping arms 6 are arranged at telescopic ends of the clamping cylinders 5;
the device also comprises a gas path control system, wherein the gas path control system comprises a total gas source, and one path of the total gas source is communicated with the corresponding clamping cylinder 5 through a solenoid valve A1 and a solenoid valve A2 respectively;
one path of the total air source is communicated with the input air port 2 after passing through the pressure regulating valve R1, the pressure gauge M1, the cut-off plug valve H1, the air storage cylinder, the cut-off plug valve H2, the cut-off plug valve H3 and the pressure sensor AUS;
one path of the total air source is communicated with the pre-control output air port 4 after passing through the pressure regulating valve R2, the pressure gauge M2, the cut-off plug valve H7, the cut-off plug valve H6 and the pressure sensor PV 3;
the output gas port 3 is communicated with the load reservoir after passing through the pressure sensor PV1 and the cut-off cock H4.
A cutoff plug door H5 is further arranged between the cutoff plug door H2 and the cutoff plug door H3, and the cutoff plug door H5 is respectively communicated with the one-way throttle valve TJ1 and the cutoff plug door H8; the load reservoir is also connected to a pressure sensor PV2 via a pressure gauge M3.
The main regulating valve assembly test method of the present invention includes the steps of,
placing a main regulating valve assembly 7 on an operation table 1, and enabling 4-port pre-control output of the main regulating valve assembly 7 to be communicated with a pre-control output gas port 4 on the operation table 1, wherein 2-port output of the main regulating valve assembly 7 is communicated with an output gas port 3 on the operation table 1, and 1-port input of the main regulating valve assembly is communicated with an input gas port 2 on the operation table 1;
step two, opening the electromagnetic valve A1 and the electromagnetic valve A2, and supplying air to the corresponding clamping air cylinders 5 through a total air source, so that the clamping air cylinders 5 drive the clamping arms 6 to move, and the main regulating valve assembly 7 on the operating platform 1 is clamped;
step three, performing an output characteristic test of the main regulating valve assembly 7, wherein the output characteristic test of the main regulating valve assembly 7 is used for testing the characteristic that the pressure of the main regulating valve assembly 7 changes along with the change of the pre-control pressure;
specifically, the electromagnetic valves A5 and A6 are powered on, the pressure of the pre-control pressure sensor PV3 is increased, and when the pressure exceeds the preset pressure Pe1, the measured value of PV2 is increased; when the electromagnetic valve A5 is powered off, the pressure is maintained in a pre-control pressure section; when the electromagnetic valve A5 is powered on and the electromagnetic valve A6 is powered off, the pre-control air channel is exhausted, the pressure value of the PV3 is reduced, the pressure of the outlet end PV2 is reduced, and when the pressure of the PV2 tends to the preset Pe1 pressure, the pressure value of the PV2 is not reduced;
recording the process of increasing and decreasing the pressure values of PV3 and PV 2;
according to the above pressure adjustment method, pe2=450 kpa±10kPa, pe1=250 kpa±10kPa is set;
before the test starts, the pipeline pressure is 0, and all the cut-off plugs are in a closed state;
the experimental procedure is as follows, wherein the schematic diagrams of the experimental operation interface and the pressure curve page are shown in fig. 8 and 9:
1) The cut-off plug door H6 is closed; simultaneously closing the cut-off plug door H2, opening the cut-off plug door H1 and the cut-off plug door H4, setting the pressure value of the pressure regulating valve R1 to 900 kPa+/-10 kPa, then opening the cut-off plug door H2 and the cut-off plug door H3, wherein the output pressure of the PV2 is Pe1, and the electromagnetic valve A5 and the electromagnetic valve A6 are in a power-off state; closing and opening the cut-off plug door H4 three times, and recording the value of the pressure regulating valve R1 and the value A1 of the Pe1 at the moment after stabilizing for 10 seconds;
2) Firstly, the electromagnetic valve A5 is powered on, then the electromagnetic valve A6 is powered on, after the power on lasts for 20 seconds, the pressure value B1 of the pressure sensor PV2 and the pressure value B2 of the sensor PV3 at the moment are recorded, the difference value B1-B2 is calculated,
3) The electromagnetic valve A6 is powered off, the pressure of the sensor PV3 starts to continuously decrease, the pressure value of the sensor PV2 is decreased, the pressure value A2 of the sensor PV2 is recorded 20s after the sensor PV2 starts to decrease, and a difference value A2-A1 is calculated;
tolerance requirements are shown in the following table
4) If the A2 value of the step 3) is not satisfactory, the main regulating valve in the assembly is considered to be disqualified;
5) In the pressure curves recorded in the test processes 1) to 3), the time from 0 to 405kPa of the rising of the PV3 value of the pre-control sensor is between 5 and 7.2s, and the time from the highest point to 45kPa of the PV3 value is between 7 and 10 s;
step four, performing a leak test of the main regulator valve assembly 7, followed by a leak test performed in the test step three:
1) Powering the electromagnetic valve A6 until the PV2 pressure value is stable;
2) The electromagnetic valve A5 is powered off, and then the electromagnetic valve A6 is powered off, so that the control pressure is in a pressure maintaining state;
3) Closing the blocking door H4, and emptying a 6L air cylinder load;
4) Closing the blocking doors H3 and H2, opening the blocking door H5, and cutting off air supply;
5) After the pressure is stabilized for 20 seconds, observing the pressure values of the pressure sensors PV1, PV3 and AUS, wherein the pressure value change of the pressure sensors PV1 and PV3 in 1min is not more than 5kPa; the pressure value of AUS should not vary by more than 6kPa;
step five, performing unidirectional function test of the main regulating valve assembly 7, and performing unidirectional function test in the following test steps:
1) The electromagnetic valve A5 is powered on, and the pre-control pressure is emptied, so that PV3 is 0kPa;
2) Closing the blocking door H8, opening the blocking door H3, and slowly opening the one-way throttle valve TJ1, wherein the blocking door H2 is in a closed state, and the blocking door H5 is in an open state at the moment, so that the pressure value of the pressure sensor AUS is reduced;
3) When the pressure value of the pressure sensor AUS is reduced to be lower than the pressure value of the pressure sensor PV1, observing the pressure value of the pressure sensor PV1, and when the pressure value of the pressure sensor PV1 begins to be reduced, recording the pressure value of the pressure sensor PV1 and the pressure value of the pressure sensor AUS at the moment, wherein the difference value between PV1 and AUS is between 0 and 65 kPa;
step six, according to the pressure adjustment method in the step three, setting the pressure values of the main regulating valve C1 and the pressure regulating valve C2, ensuring that the value of the pressure sensor PV2 at the outlet meets the requirements of Pe1 and Pe2, and evacuating air in the pipeline after setting is completed, so as to complete the test;
the test data were counted, and the data of the counted form are shown in fig. 10.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (6)
1. The main regulating valve assembly testing equipment is characterized by comprising an operation table (1), wherein an input air port (2), an output air port (3) and a pre-control output air port (4) are respectively arranged on the operation table (1), a plurality of clamping cylinders (5) are respectively arranged on the operation table (1), and clamping arms (6) are arranged at telescopic ends of the clamping cylinders (5);
the device also comprises a gas path control system, wherein the gas path control system comprises a total gas source, and one path of the total gas source is communicated with a corresponding clamping cylinder (5) through a solenoid valve A1 and a solenoid valve A2 respectively;
one path of the total air source is communicated with an input air port (2) after passing through a pressure regulating valve R1, a pressure gauge M1, a cut-off plug valve H1, an air storage cylinder, a cut-off plug valve H2, a cut-off plug valve H3 and a pressure sensor AUS;
one path of the total air source is communicated with a pre-control output air port (4) after passing through a pressure regulating valve R2, a pressure gauge M2, a cut-off plug valve H7, a cut-off plug valve H6 and a pressure sensor PV 3;
the output air outlet port (3) is communicated with the load air cylinder after passing through the pressure sensor PV1 and the cut-off cock H4.
2. The main regulator valve assembly test apparatus according to claim 1, wherein a shut-off plug H5 is further provided between the shut-off plug H2 and the shut-off plug H3, the shut-off plug H5 being in communication with the one-way throttle valve TJ1 and the shut-off plug H8, respectively.
3. The main regulator valve assembly test apparatus of claim 1, wherein the load reservoir is further coupled to a pressure sensor PV2 via a pressure gauge M3.
4. A method for testing a main regulating valve assembly is characterized by comprising the following steps,
placing a main regulating valve assembly (7) on an operation table (1) and enabling 4-port pre-control output of the main regulating valve assembly (7) to be communicated with a pre-control output air port (4) on the operation table (1), enabling 2-port output of the main regulating valve assembly (7) to be communicated with an output air port (3) on the operation table (1), and enabling 1-port input of the main regulating valve assembly to be communicated with an input air port (2) on the operation table (1);
step two, opening the electromagnetic valve A1 and the electromagnetic valve A2, and supplying air to the corresponding clamping cylinder (5) through a total air source, so that the clamping cylinder (5) drives the clamping arm (6) to move, and the main regulating valve assembly (7) on the operating platform (1) is clamped;
step three, performing an output characteristic test of the main regulating valve assembly (7), and using the output characteristic test of the main regulating valve assembly (7) to test the characteristic that the pressure of the main regulating valve assembly (7) changes along with the change of the pre-control pressure;
specifically, the electromagnetic valves A5 and A6 are powered on, the pressure of the pre-control pressure sensor PV3 is increased, and when the pressure exceeds the preset Pe1 pressure, the measured value of PV2 is increased; when the electromagnetic valve A5 is powered off, the pressure is maintained in a pre-control pressure section; when the electromagnetic valve A5 is powered on and the electromagnetic valve A6 is powered off, the pre-control air channel is exhausted, the pressure value of the PV3 is reduced, the pressure of the outlet end PV2 is reduced, and when the pressure of the PV2 tends to the preset Pe1 pressure, the pressure value of the PV2 is not reduced;
recording the process of increasing and decreasing the pressure values of PV3 and PV 2;
according to the above pressure adjustment method, pe2=450 kpa±10kPa, pe1=250 kpa±10kPa is set;
before the test starts, the pipeline pressure is 0, and all the cut-off plugs are in a closed state;
the test process comprises the following steps:
1) The cut-off plug door H6 is closed; simultaneously closing the cut-off plug door H2, opening the cut-off plug door H1 and the cut-off plug door H4, setting the pressure value of the pressure regulating valve R1 to 900 kPa+/-10 kPa, then opening the cut-off plug door H2 and the cut-off plug door H3, wherein the output pressure of the PV2 is Pe1, and the electromagnetic valve A5 and the electromagnetic valve A6 are in a power-off state; closing and opening the cut-off plug door H4 three times, and recording the value of the pressure regulating valve R1 and the value A1 of the Pe1 at the moment after stabilizing for 10 seconds;
2) Firstly, the electromagnetic valve A5 is powered on, then the electromagnetic valve A6 is powered on, after the power on lasts for 20 seconds, the pressure value B1 of the pressure sensor PV2 and the pressure value B2 of the sensor PV3 at the moment are recorded, the difference value B1-B2 is calculated,
3) The electromagnetic valve A6 is powered off, the pressure of the sensor PV3 starts to continuously decrease, the pressure value of the sensor PV2 is decreased, the pressure value A2 of the sensor PV2 is recorded 20s after the sensor PV2 starts to decrease, and a difference value A2-A1 is calculated;
4) If the A2 value of the step 3) is not satisfactory, the main regulating valve in the assembly is considered to be disqualified;
5) In the pressure curves recorded in the test processes 1) to 3), the time from 0 to 405kPa of the rising of the PV3 value of the pre-control sensor is between 5 and 7.2s, and the time from the highest point to 45kPa of the PV3 value is between 7 and 10 s;
step four, performing a leak test of the main regulator valve assembly (7), followed by a leak test performed in the test step three:
1) Powering the electromagnetic valve A6 until the PV2 pressure value is stable;
2) The electromagnetic valve A5 is powered off, and then the electromagnetic valve A6 is powered off, so that the control pressure is in a pressure maintaining state;
3) Closing the blocking door H4, and emptying a 6L air cylinder load;
4) Closing the blocking doors H3 and H2, opening the blocking doors H5 and H8, cutting off the air supply and discharging the pressure in the middle section of the pipeline;
5) After the pressure is stabilized for 20 seconds, observing the pressure values of the pressure sensors PV1, PV3 and AUS, wherein the pressure value change of the pressure sensors PV1 and PV3 in 1min is not more than 5kPa; the pressure value of AUS should not vary by more than 6kPa;
step five, carrying out unidirectional function test of the main regulating valve assembly (7), and carrying out unidirectional function test in the following test steps:
1) The electromagnetic valve A5 is powered on, and the pre-control pressure is emptied, so that PV3 is 0kPa;
2) Closing the blocking door H8, opening the blocking door H3, and slowly opening the one-way throttle valve TJ1, wherein the blocking door H2 is in a closed state, and the blocking door H5 is in an open state at the moment, so that the pressure value of the pressure sensor AUS is reduced;
3) When the pressure value of the pressure sensor AUS is reduced to be lower than the pressure value of the pressure sensor PV1, observing the pressure value of the pressure sensor PV1, and when the pressure value of the pressure sensor PV1 begins to be reduced, recording the pressure value of the pressure sensor PV1 and the pressure value of the pressure sensor AUS at the moment, wherein the difference value between PV1 and AUS is between 0 and 65 kPa;
step six, according to the pressure adjusting method in the step three, setting the pressure values of the main regulating valve C1 and the pressure regulating valve C2, ensuring that the value of the pressure sensor PV2 at the outlet meets the requirements of Pe1 and Pe2, and evacuating air in the pipeline after setting is completed, so as to complete the test.
5. The method of testing a main regulator valve assembly according to claim 4, wherein the difference B1-B2 in the third step should be maintained at 20 to 35KPa or 5 to 20KPa.
6. The method of testing a main regulator valve assembly according to claim 4, wherein the difference A2-A1 in the third step should be maintained at-10 to 40KPa or 20 to 70KPa.
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| CN202311678122.1A CN117664471A (en) | 2023-12-08 | 2023-12-08 | Main regulating valve assembly testing equipment and testing method |
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