CN106872155B - exhaust valve performance test system and test method - Google Patents

exhaust valve performance test system and test method Download PDF

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Publication number
CN106872155B
CN106872155B CN201710041529.1A CN201710041529A CN106872155B CN 106872155 B CN106872155 B CN 106872155B CN 201710041529 A CN201710041529 A CN 201710041529A CN 106872155 B CN106872155 B CN 106872155B
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valve
pipeline
exhaust
pressure
gas storage
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CN106872155A (en
Inventor
张继伟
黄健
王剑
彭林
范宜霖
雷艳
张绍华
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Hefei General Machinery Research Institute Co Ltd
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Hefei General Machinery Research Institute Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts

Abstract

The invention relates to a system and a method for testing performance of an exhaust valve. The testing system comprises a compressor, a gas storage section pipeline, a flow measuring section pipeline and a testing container which are sequentially connected along the gas flowing direction, and a first main valve is arranged between the compressor and the gas storage section pipeline; a plurality of parallel air storage tanks are connected to the air storage section pipeline, and a first switch valve is arranged between each air storage tank and the corresponding air storage section pipeline; the flow measurement section pipeline comprises a plurality of branch pipelines which have different calibers and are arranged in parallel, the inlet of each branch pipeline is provided with a switch valve II, the outlet of each branch pipeline is provided with a switch valve III, and the branch pipelines are also provided with a pressure regulating valve and a flow meter; the testing container is connected with a mounting pipe for mounting the tested valve, and a first pressure sensor is arranged at the inlet of the tested valve. The exhaust valve performance test system has expandability, and can support the subsequent test of the exhaust valve with larger specification by increasing the number of the gas storage tanks or the number of the branch pipelines.

Description

Exhaust valve performance test system and test method
Technical Field
The invention belongs to the field of exhaust valves, and particularly relates to an exhaust valve performance testing system and a testing method.
Background
The exhaust valve is usually installed at the highest point of the water supply pipeline and used for discharging gas separated out in water in the pipeline so as to avoid head loss caused by gas accumulation in the pipeline, and the exhaust valve is a key component for ensuring smooth exhaust and safe operation of the water supply pipeline. The measuring range of the flowmeter in the existing exhaust valve performance testing device is single, and the flowmeter can only test the exhaust valve with specific caliber specification. Therefore, it is desirable to provide a system that is scalable and capable of performing performance tests for exhaust valves with multiple diameters.
Disclosure of Invention
in order to solve the above technical problems, the present invention provides a system and a method for testing exhaust valve performance with expandability.
In order to realize the purpose of the invention, the invention adopts the following technical scheme:
A performance test system for an exhaust valve comprises a compressor, a gas storage section pipeline, a flow measurement section pipeline and a test container which are sequentially connected along the gas flow direction, wherein a first main valve is arranged between the compressor and the gas storage section pipeline; the gas storage section pipeline is connected with a plurality of gas storage tanks arranged in parallel, and a first switch valve is arranged between each gas storage tank and the corresponding gas storage section pipeline; the flow measurement section pipeline comprises a plurality of branch pipelines which have different calibers and are arranged in parallel, each branch pipeline inlet is provided with a switch valve II, each branch pipeline outlet is provided with a switch valve III, and the branch pipelines are also provided with a pressure regulating valve and a flowmeter; the testing container is connected with a mounting pipe for mounting a tested valve, and a first pressure sensor is arranged at an inlet of the tested valve.
Furthermore, a second main valve is arranged between the gas storage section pipeline and the flow measurement section pipeline, and a second pressure sensor and a temperature sensor are further arranged on the testing container.
Furthermore, the test container is connected with installation pipes with various pipe diameters, and the installation pipes are respectively installed in a matching mode with exhaust valves with various calibers.
Furthermore, a pressure gauge, a first safety valve and a first blow-off valve are arranged on the gas storage tank, and the test container is connected with a second safety valve and a second blow-off valve.
furthermore, the system further comprises a control unit and a data acquisition unit, wherein the control unit is connected with the first main valve, the first switch valve, the second main valve, the second switch valve, the pressure regulating valve and the third switch valve in a control mode, the data acquisition unit is connected with the flowmeter, the first pressure sensor, the second pressure sensor and the temperature sensor, and the data acquisition unit is further connected with a computer terminal.
A test method based on the exhaust valve performance test system comprises the following steps:
S1, closing the second main valve, opening the first main valve and the first switch valve, starting the compressor, inflating each air storage tank through the compressor, and closing the first switch valve and the first main valve after each air storage tank is full;
S2, determining the number of air storage tanks, the number of branch pipelines and the caliber required by the test according to the caliber parameters of the tested valve;
S3, opening the main valve II and the switch valves I of the gas storage tanks required by the test, opening the inlet end switch valve II, the pressure regulating valve and the outlet end switch valve III of the required branch pipeline, enabling a medium to flow out of the gas storage tanks and then enter the branch pipeline and then flow into the test container, and meanwhile, acquiring data of the flowmeter, the pressure sensor I, the temperature sensor and the pressure sensor II by the data acquisition unit;
And S4, changing the pressure in the branch pipeline by adjusting the pressure regulating valve, measuring multiple groups of data under different exhaust pressure differences, inputting the acquired data into a computer terminal by the data acquisition unit for processing, and obtaining an exhaust pressure difference-exhaust volume curve of the measured valve.
The invention has the beneficial effects that:
(1) According to the invention, air is used as a test medium, a pipeline of an air storage section in the test system is connected with a plurality of air storage tanks connected in parallel, the number of the required air storage tanks can be selected during performance test according to the caliber of a valve to be tested, and the waste of resources is avoided; in addition, the flow measurement section pipeline is formed by connecting a plurality of branch pipelines with different calibers in parallel, each branch pipeline is provided with a flowmeter with different ranges, and the flow measurement branch pipelines can be selectively opened during testing, so that the combination of the flowmeters with different ranges is realized, and the performance test of all calibers of the exhaust valve is met. Compared with the common test pipeline, the test container can accurately simulate the process of air gathering and then discharging, is more consistent with the real running state of the exhaust valve in the pipeline, and ensures the test accuracy. The opening and closing actions of each main valve and each switch valve are remotely controlled by the control unit, and the measurement data of the flow meter, the pressure sensor I, the pressure sensor II and the temperature sensor are acquired by the data acquisition unit, so that the measurement accuracy and the measurement precision of the system operation are ensured. The exhaust valve performance test system has expandability, and can support the subsequent test of the exhaust valve with larger specification by increasing the number of the gas storage tanks or the number of the branch pipelines.
(2) the first pressure sensor can detect the pressure P1 at the inlet of the measured valve, the pressure P2 at the outlet of the measured valve is the atmospheric pressure, the pressure difference delta P between the inlet and the outlet of the measured valve, which is P1-P2, can be finally obtained through the detection of the first pressure sensor, and the pressure difference delta P between the inlet and the outlet is the exhaust pressure difference of the measured valve. The flowmeter can detect the gas flow in the pipeline of the flow measurement test section, so that the exhaust quantity Q of the tested valve is obtained. The pressure regulating valve can regulate the pressure in each branch pipeline, so that the exhaust volume corresponding to a plurality of groups of exhaust pressure differences in the process that the exhaust valve is changed from the state that the exhaust hole is opened to the state that the exhaust hole is closed is obtained.
(3) when the performance test of the exhaust valve is carried out, one installation pipe with the pipe diameter matched with the caliber of the tested valve is selected to install the tested valve, namely, the installation pipes with various pipe diameters are arranged to meet the requirements of the performance test process of the exhaust valve with various calibers, the application range is wide, and the characteristic of expandability of the exhaust valve is reflected.
(4) The safety valve I and the safety valve II ensure the safety of the test pipeline. The first blow-off valve and the second blow-off valve can respectively discharge sundries in the gas storage tank and the test container before the test is carried out, so that the accuracy of the performance test of the tested valve is improved, and meanwhile, the function of protecting a test pipeline is also achieved. The temperature sensor can detect the temperature in the test container in real time, so that the influence degree of the temperature on the performance of the tested valve is tested, and the temperature sensor has an instructive effect on the use temperature of the exhaust valve under the real condition. The second pressure sensor can detect the pressure change in the test container.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
the designations in the drawings have the following meanings:
11-compressor 12-gas storage section pipeline 121-main valve one 122-main valve two
13-flow measuring section pipeline 131-branch pipeline 132-switching valve II 133-switching valve III
134-pressure regulating valve 135-flowmeter 14-testing container 141-installation pipe
142-pressure sensor one 143-pressure sensor two 144-temperature sensor
145-blowdown valve II 146-safety valve II 15-gas storage tank 151-switch valve I
152-pressure gauge 153-safety valve 154-blowdown valve 16-tested valve
17-control unit 18-data acquisition unit 19-computer terminal
Detailed Description
The technical scheme of the invention is more specifically explained by combining the following embodiments:
Example 1
As shown in fig. 1, the system for testing the performance of the exhaust valve comprises a compressor 11, a gas storage section pipeline 12, a flow measurement section pipeline 13 and a testing container 14 which are sequentially connected along a gas flow direction, wherein a first main valve 121 is arranged between the compressor 11 and the gas storage section pipeline 12; the gas storage section pipeline 12 is connected with a plurality of gas storage tanks 15 which are arranged in parallel, and a first switch valve 151 is arranged between each gas storage tank 15 and the corresponding gas storage section pipeline 12; the flow measurement section pipeline 13 comprises a plurality of branch pipelines 131 which have different calibers and are arranged in parallel, an inlet of each branch pipeline 131 is provided with a second switch valve 132, an outlet of each branch pipeline 131 is provided with a third switch valve 133, and the branch pipelines 131 are also provided with a pressure regulating valve 134 and a flow meter 135; the test container 14 is connected with a mounting pipe 141 for mounting the valve 16 to be tested, and a first pressure sensor 142 is arranged at the inlet of the valve 16 to be tested.
A second main valve 122 is arranged between the gas storage section pipeline 12 and the flow measurement section pipeline 13, and a second pressure sensor 143 and a temperature sensor 144 are further arranged on the test container 14.
the test container 14 is connected with installation pipes 141 with various pipe diameters, and the installation pipes 141 are respectively installed in a matching manner with tested valves 16 with various calibers.
The gas storage tank 15 is provided with a pressure gauge 152, a safety valve 153 and a drain valve 154, and the test container 14 is connected with a safety valve II 146 and a drain valve II 145.
The system further comprises a control unit 17 and a data acquisition unit 18, wherein the control unit 17 is in control connection with the first main valve 121, the first switch valve 151, the second main valve 122, the second switch valve 132, the pressure regulating valve 134 and the third switch valve 133, the data acquisition unit 18 is connected with the flow meter 135, the first pressure sensor 142, the second pressure sensor 143 and the temperature sensor 144, and the data acquisition unit 18 is further connected with the computer terminal 19.
According to the invention, air is used as a test medium, the pipeline 12 of the gas storage section in the test system is connected with the plurality of gas storage tanks 15 connected in parallel, the number of the required gas storage tanks 15 can be selected according to the caliber size of the tested valve 16 during performance test, and the waste of resources is avoided; in addition, the flow measurement section pipeline 13 is formed by connecting a plurality of branch pipelines 131 with different calibers in parallel, each branch pipeline 131 is provided with a flowmeter 135 with different ranges, and the flow measurement branch pipeline 131 can be selectively opened during testing, so that the combination of the flowmeters 135 with different ranges is realized, and the performance test of the tested valve 16 with all calibers is met. Compared with the common test pipeline, the test container 14 can accurately simulate the process of air gathering and then discharging, is more consistent with the real running state of the tested valve in the pipeline, and ensures the test accuracy. The opening and closing actions of the main valves and the switch valves are remotely controlled by the control unit 17, and the measurement data of the flow meter 135, the pressure sensor I142, the pressure sensor II 143 and the temperature sensor 144 are acquired by the data acquisition unit 18, so that the measurement accuracy and the measurement precision of the system operation are ensured. The exhaust valve performance test system has expandability, and can support the subsequent test of the exhaust valve with larger specification by increasing the number of the gas storage tanks 15 or the number of the branch pipelines 131.
The first pressure sensor 142 can detect the pressure P1 at the inlet of the measured valve 16, the pressure P2 at the outlet of the measured valve 16 is the atmospheric pressure, the pressure difference Δ P between the inlet and the outlet of the measured valve 16, which is P1-P2, can be finally obtained through the detection of the first pressure sensor 142, and the pressure difference Δ P between the inlet and the outlet is the exhaust pressure difference of the measured valve. The flow meter 135 can detect the gas flow in the pipeline of the flow measurement test section, so as to obtain the gas displacement Q of the measured valve. The pressure regulating valve 134 may regulate the gas pressure in each branch line 131 to obtain a gas pressure required for the exhaust valve to change from the state in which the exhaust hole is opened to the state in which the exhaust hole is closed, compare the detected exhaust pressure difference when the exhaust hole of the exhaust valve is closed with the designed exhaust pressure difference, and if the detected exhaust pressure difference is matched with the designed exhaust pressure difference, it is determined that the performance of the exhaust valve is reliable.
When the performance test of the exhaust valve is carried out, one installation pipe 141 with the pipe diameter matched with the 16-caliber of the tested valve is selected to install the tested valve, namely, the installation pipes 141 with various pipe diameters are arranged to meet the requirements of the performance test process of the exhaust valve with various calibers, the application range is wide, and the characteristic of expandability of the exhaust valve is reflected.
The safety valve I153 and the safety valve II 146 ensure the safety of the test pipeline. The first blowoff valve 154 and the second blowoff valve 145 can respectively discharge sundries in the air storage tank 15 and the test container 14 before the test is carried out, so that the accuracy of the performance test of the tested valve 16 is improved, and meanwhile, the function of protecting a test pipeline is also achieved. The temperature sensor 144 can detect the temperature in the test container 14 in real time to test the temperature effect on the performance of the valve 16, which is instructive on the actual operating temperature of the exhaust valve. The second pressure sensor 143 may detect pressure changes within the test container 14.
Example 2
The testing method of the exhaust valve performance testing system comprises the following steps:
S1, closing the second main valve 122, opening the first main valve 121 and the first switch valve 151, starting the compressor 11, inflating the air storage tanks 15 through the compressor 11, and closing the first switch valve 151 and the first main valve 121 after the air storage tanks 15 are full;
S2, determining the number of the air storage tanks 15, the number of the branch pipelines 131 and the caliber required by the test according to the caliber parameters of the tested valve 16;
s3, opening the second main valve 122 and the first switch valves 151 of the respective air tanks 15 required for the test, opening the second inlet switch valve 132, the pressure regulating valve 134 and the third outlet switch valve 133 of the required branch line 131, after the medium flows out of the air tanks 15, the medium enters the branch line 131 and then flows into the test container 14, and the data acquisition unit 18 acquires data of the flow meter 135, the first pressure sensor 142, the temperature sensor 144 and the second pressure sensor 143;
S4, the pressure in the branch line 131 is changed by adjusting the pressure regulating valve 134, and a plurality of sets of data are measured under different pressure differences, and the data collecting unit 18 inputs the collected data into the computer terminal 19 for processing and obtaining the exhaust pressure difference-exhaust volume curve of the valve 16 to be measured.
The 16-caliber DN100 of the tested valve and the exhaust pressure difference of 0.035MPa are respectively selected 2 10m 3 air storage tanks with the pressure of 2.5MPa, DN100 branch pipelines are selected, and the flow meter range on the branch pipelines is 448 and 12483Nm 3/hr.
the aperture DN150 of the tested valve 16 and the exhaust pressure difference 0.07MPa, 4 air storage tanks with the pressure of 10m 3 are correspondingly selected, the pressure of the air storage tank is 2.5MPa, DN150 branch pipelines are selected, and the flow meter range on the branch pipelines is 1016 and 28331Nm 3/hr.
The number and diameter of the branch pipes can be selected according to the requirements of the test by specifically selecting the number of air tanks and the pressure of the air tanks according to the caliber of the tested valve 16 and the designed exhaust pressure difference.
The testing method is simple to operate, high in safety coefficient and accurate in performance testing of the tested valve.

Claims (6)

1. The utility model provides an exhaust valve capability test system which characterized in that: the device comprises a compressor (11), a gas storage section pipeline (12), a flow measurement section pipeline (13) and a test container (14) which are sequentially connected along the gas flowing direction, wherein a first main valve (121) is arranged between the compressor (11) and the gas storage section pipeline (12); the gas storage section pipeline (12) is connected with a plurality of gas storage tanks (15) which are arranged in parallel, and a first switch valve (151) is arranged between each gas storage tank (15) and the gas storage section pipeline (12); the flow measurement section pipeline (13) comprises a plurality of branch pipelines (131) which have different calibers and are arranged in parallel, an inlet of each branch pipeline (131) is provided with a second switch valve (132), an outlet of each branch pipeline (131) is provided with a third switch valve (133), and the branch pipelines (131) are also provided with a pressure regulating valve (134) and a flow meter (135); the testing container (14) is connected with an installation pipe (141) used for installing the tested valve (16), and a first pressure sensor (142) is arranged at the inlet of the tested valve (16).
2. The exhaust valve performance testing system of claim 1, wherein: a second main valve (122) is arranged between the gas storage section pipeline (12) and the flow measurement section pipeline (13), and a second pressure sensor (143) and a temperature sensor (144) are further arranged on the testing container (14).
3. The exhaust valve performance testing system of claim 1, wherein: the testing container (14) is connected with mounting pipes (141) with various pipe diameters, and the mounting pipes (141) are respectively matched with tested valves (16) with various calibers for mounting.
4. The exhaust valve performance testing system of claim 2, wherein: the gas storage tank (15) is provided with a pressure gauge (152), a first safety valve (153) and a first blow-off valve (154), and the test container (14) is connected with a second safety valve (146) and a second blow-off valve (145).
5. The exhaust valve performance testing system of claim 4, wherein: the system further comprises a control unit (17) and a data acquisition unit (18), wherein the control unit (17) is in control connection with the first main valve (121), the first switch valve (151), the second main valve (122), the second switch valve (132), the pressure regulating valve (134) and the third switch valve (133), the data acquisition unit (18) is connected with the flowmeter (135), the first pressure sensor (142), the second pressure sensor (143) and the temperature sensor (144), and the data acquisition unit (18) is further connected with a computer terminal (19).
6. A testing method based on the exhaust valve performance testing system of claim 5, comprising the steps of:
S1, closing the second main valve (122), opening the first main valve (121) and the first switch valve (151), starting the compressor (11), inflating each air storage tank (15) through the compressor (11), and closing the first switch valve (151) and the first main valve (121) after each air storage tank (15) is full;
S2, determining the number of the air storage tanks (15), the number of the branch pipelines (131) and the caliber required by the test according to the caliber parameters of the tested valve (16);
s3, opening the second main valve (122) and a first switch valve (151) of each air storage tank (15) required by the test, opening a second inlet switch valve (132), a pressure regulating valve (134) and a third outlet switch valve (133) of a required branch pipeline (131), enabling a medium to flow out of the air storage tanks (15), then enabling the medium to enter the branch pipeline (131) and then flow into the test container (14), and meanwhile, acquiring data of the flow meter (135), the first pressure sensor (142), the temperature sensor (144) and the second pressure sensor (143) by the data acquisition unit (18);
s4, changing the pressure in the branch pipeline (131) by adjusting the pressure regulating valve (134), measuring a plurality of groups of data under different exhaust pressure differences, inputting the collected data into a computer terminal (19) by the data collecting unit (18) for processing, and obtaining an exhaust pressure difference-exhaust volume curve of the measured valve (16).
CN201710041529.1A 2017-01-20 2017-01-20 exhaust valve performance test system and test method Active CN106872155B (en)

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