CN112345233A - Multifunctional ventilation valve flexibility test system and test method - Google Patents
Multifunctional ventilation valve flexibility test system and test method Download PDFInfo
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- CN112345233A CN112345233A CN202011347465.6A CN202011347465A CN112345233A CN 112345233 A CN112345233 A CN 112345233A CN 202011347465 A CN202011347465 A CN 202011347465A CN 112345233 A CN112345233 A CN 112345233A
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- G—PHYSICS
- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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Abstract
The invention belongs to a flexible test system and a test method of a multifunctional ventilation valve, comprising a static pressure box of the flexible test system of the ventilation valve, which is characterized in that a pore plate flow equalizer is arranged in a cavity of the static pressure box, the front end of the static pressure box passes through a detection port arranged in the middle of the front wall of the static pressure box, and a gas detection control valve II is arranged in the middle of a detection pipeline; the gas access pipeline I is provided with a gas detection control valve I and an MF5700 thermal flowmeter; a three-way sliding rail is provided with a sliding rail lock, and the end of a displacement sensor support is provided with an MC-HGC1000 displacement sensor; the other end of the orifice plate flow equalizer is provided with a detection port in the middle of the rear wall of the static pressure box, and a first flange is arranged on the detection port; and an ELM110-OAC differential pressure sensor I and an ELM112-OAC differential pressure sensor II are arranged at the middle upper part of the right wall of the static pressure tank. The invention can flexibly select and detect the performance parameters of the air valves with different calibers, thereby ensuring the detection precision and effectiveness and solving the problem of difficult detection of the large-caliber valves.
Description
Technical Field
The invention belongs to a test system and a test method of a ventilation valve, and particularly relates to a flexible test system and a flexible test method of a multifunctional ventilation valve.
Background
The key technical parameters of the ventilation valve (hereinafter referred to as an air valve) are valve sheet air leakage quantity, valve body air leakage quantity and valve sheet deflection. At present, the performance detection of the air valve mainly depends on a detection mechanism for detection, the detection is difficult to be completed for a large-caliber valve detection mechanism, high transportation cost needs to be paid when the large-caliber valve is transported to the detection mechanism, and few enterprises with detection capability exist. Due to the limitation of the measuring range and the precision of the detection equipment, the patent with the patent number of CN110108647U granted by the national patent office can detect other parameters except the flexibility of the blade, but the air supply system and the measurement system are single, and the detection task of the wide-caliber air valve cannot be completed. The patent with the authorization number of CN208831874U can only detect the air leakage rate of the valve plate of the air valve, and can not detect the deflection of the valve plate.
Disclosure of Invention
The invention aims to solve the technical defects and provides a multifunctional ventilation valve flexibility test system and a test method, wherein the test system adopts a square static pressure box, a reducing upper cover with a cavity in the middle is arranged on the square static pressure box, a flow equalizer is arranged in the cavity, and a flow stabilizing reducer, a flow stabilizing pipe and other parts are arranged in front of the static pressure box.
The technical scheme adopted by the invention for solving the technical problem is as follows: a flexible test system and test method of the ventilation valve, including the static pressure case of the flexible test system of the ventilation valve, characterized by that to equip with the upper cover for the taper reducing of four sides on the upper end of the static pressure case, there are cavities in the middle, the four outside walls of the static pressure case distribute and fix multiple strengthening ribs evenly; an air valve connecting flange is fixed on the upper surface of the upper cover; a hole plate current equalizer is arranged in the cavity, a plurality of round holes are uniformly distributed on the circumference of the hole plate current equalizer, the front end of the hole plate current equalizer penetrates through a detection port arranged in the middle of the front wall of the static pressure box, a first flange is fixed on the detection port, a steady flow pipeline is fixed on the first flange by using the same flange, a second flange is arranged at the other end of the steady flow pipeline, a steady flow reducing conical pipe is arranged on a second flange by using the same flange, a third flange is arranged at the right end of the steady flow reducing conical pipe, a detection pipeline is arranged on the third flange by using the same flange, and a second flow meter is arranged; a gas detection control valve II is arranged in the middle of the detection pipeline; a compressed air inlet is arranged at the lower part of the rear end of the right wall of the static pressure box and communicated with a first gas access pipeline, a first gas access pipeline is communicated with a second gas regulating valve, the second gas regulating valve is communicated with a second gas access pipeline below, a first gas regulating valve is arranged at the end of the first gas regulating valve, and a first gas detection control valve and an MF5700 thermal flowmeter are arranged on a first gas access pipeline above; sliding rail seats are arranged on the upper parts of two sides of the left side wall of the static pressure box, a three-way sliding rail is arranged between the sliding rail seats, a sliding rail lock is arranged on the three-way sliding rail, a displacement sensor support is fixed on the sliding rail lock, and an MC-HGC1000 displacement sensor is arranged at the end head of the displacement sensor support; the other end of the orifice plate flow equalizer is provided with a detection port in the middle of the rear wall of the static pressure box, and the detection port is also provided with a flange I; and an ELM110-OAC differential pressure sensor I and an ELM112-OAC differential pressure sensor II are arranged at the middle upper part of the right wall of the static pressure tank.
The multifunctional ventilation valve flexibility test system and the test method adopt the following steps:
a. the method comprises the steps that a detected air valve is installed on an air valve connecting flange, a valve plate needs to be completely closed, gas can be directly accessed to detect leakage quantity and deflection of the valve plate of the air valve after the sealing of a connecting part is ensured, if the leakage quantity of a valve body of the air valve is detected, a flange on one side of the air valve needs to be sealed by a blind plate, and the sealing performance is ensured;
b. the air enters the fan through two paths after passing through a compressed air inlet, a large-flow air regulating valve II is opened when a large-diameter air valve is detected, a gas detection control valve II is opened to enable the air to enter the fan through a gas inlet pipeline I, the air speed is reduced through a constant-flow reducing tapered pipe after passing through a detection pipeline, the air enters a cavity in a static pressure box after passing through a constant-flow pipeline and being equalized through a current equalizer, and the equalized air applies pressure to a valve plate and a valve body of the detected valve;
c. adjusting a gas adjusting valve II to enable the differential pressure sensor I or the differential pressure sensor II to be selected according to the adjusting pressure range, and recording the flow value of the flow meter II after the pressure reaches a preset value to obtain the valve plate leakage amount or the valve body leakage amount of the air valve under the preset pressure; when the air valve with the caliber of less than 1200mm is detected, a first gas regulating valve is opened, a first gas detection control valve is opened, gas enters from a first gas access pipeline, the wind speed is reduced by a constant-flow reducing conical pipe after passing through a detection pipeline, the gas flows through a constant-flow pipeline and then enters a static pressure box after being equalized by a flow equalizer, and the equalized gas applies pressure to a valve plate and a valve body of the detected valve;
d. adjusting the first gas regulating valve to enable the first differential pressure sensor or the second differential pressure sensor to select pressure to reach a preset value according to a pressure adjusting range, and then recording the flow value of the MF5700 thermal flowmeter to obtain the valve plate leakage rate or the valve body leakage rate of the air valve under the preset pressure; when the deflection of the valve plate is detected, firstly unlocking X, Y, Z directions of the slide rail locks, selecting according to the required adjustment direction, driving the three-way slide rail to move the displacement sensor to the outer edge of the axial center of the detected valve plate, then locking the slide rail locks, then adjusting the pressure to a preset value according to the pressurization mode, recording the displacement value of the measured point of the valve plate before and after pressurization under the preset pressure, and finally calculating the deflection of the valve plate under the preset pressure according to the length of the blade;
e. if two sets of current flow access pipelines and two flow detection meters still can not meet the flow demand, the detection interface with the access flow rate of more than 1000m for heavy year/h is accessed to the detection system meeting the actual demand so as to meet the detection demand.
The invention has the beneficial effects that: the air valve with wide caliber and different shapes can be detected in terms of valve plate air leakage quantity, valve body air leakage quantity and blade deflection; and for the air valves with different calibers, detection equipment can be flexibly selected according to performance parameters of the air valves, so that the detection precision and effectiveness are ensured. The problem that a large-diameter valve is difficult to detect is solved, and some detection systems cannot meet the requirements of all key parameter detection tasks of the air valve.
Drawings
The following description is made in detail by way of example with reference to the accompanying drawings.
FIG. 1 is a front three-dimensional view of a multi-functional vent valve flexibility test system and test method;
fig. 2 is a rear three-dimensional view of fig. 1.
In the figure: 1-static pressure box; 1-1-chamber; 1-2-reinforcing ribs; 2-covering the upper cover; 3-a slide rail seat; 4-three-way sliding rail; 5-sliding rail lock; 6-displacement sensor support; 7-MC-HGC1000 displacement transducer; 8-an air valve connecting flange; 9-compressed air inlet; 10-gas access line one; 11-a gas regulating valve I; 12-gas regulating valve II; 13-gas access pipe II; 14-a first gas detection control valve; 15-gas detection control valve II; 16-ELM110-OAC differential pressure sensor I; a second 17-ELM110-OAC differential pressure sensor; 18-a detection line; 19-MF5700 thermal flow meter; 20-flow meter two; 21-detecting the pipeline; 22-steady flow reducing taper pipe; 23-a steady flow pipeline; 24-orifice plate flow equalizer; 24-1-round hole; 25-flange one; 26-a control box; 27-ground feet; 28-flange two; 29-flange three; 30-detection port.
Detailed Description
The embodiment refers to the attached drawings, and discloses a ventilation valve flexibility testing system and a testing method, which comprise a static pressure box 1 of the ventilation valve flexibility testing system, and are characterized in that an upper cover 2 with conical reducing diameters on four sides is arranged at the upper end of the static pressure box 1, a cavity 1-1 is arranged in the middle of the static pressure box 1, and sixteen reinforcing ribs 1-2 are distributed and fixed outside four walls of the static pressure box 1; a wind valve connecting flange 8 is fixed on the upper cover 2; a pore plate current equalizer 24 is arranged in the cavity 1-1, a plurality of circular holes 24-1 are uniformly distributed on the circumference of the pore plate current equalizer 24, the front end of the pore plate current equalizer passes through a detection port 30 arranged in the middle of the front wall of the static pressure box 1, a first flange 25 is fixed on the detection port 30, a steady flow pipeline 23 is fixed on the first flange 25 by using the same flange, a second flange 28 is arranged at the other end of the steady flow pipeline 23, a steady flow reducing tapered pipe 22 is arranged on the second flange 28 by using the same flange, a third flange 29 is arranged at the right end of the steady flow reducing tapered pipe 22, a detection pipeline 21 is arranged on the same flange, and a second flow meter 20 is arranged on the detection pipeline 21 between the two; a second gas detection control valve 15 is arranged in the middle of the detection pipeline 21; a compressed air inlet 9 is arranged at the lower part of the rear end of the right wall of the static pressure box 1, the compressed air inlet 9 is communicated with a first gas inlet pipeline 10, the first gas inlet pipeline 10 is communicated with a second gas regulating valve 12, the second gas regulating valve 12 is communicated with a second gas inlet pipeline 13 below, a first gas regulating valve 11 is arranged at the end, and a first gas detection control valve 14 and an MF5700 thermal flowmeter 19 are arranged on the first gas inlet pipeline 10 above; the upper parts of two sides of the left side wall of the static pressure box 1 are provided with slide rail seats 3, three-way slide rails 4 are arranged between the slide rail seats 3, a slide rail lock 5 is arranged on the three-way slide rail 4, a displacement sensor support 6 is fixed on the slide rail lock 5, and the end of the displacement sensor support 6 is provided with an MC-HGC1000 displacement sensor 7; the other end of the orifice plate flow equalizer 24 is provided with a detection port 30 in the middle of the rear wall of the static pressure box 1, and a flange I25 is also arranged on the detection port 30; and a first ELM110-OAC differential pressure sensor 16 and a second ELM112-OAC differential pressure sensor 17 are arranged at the middle upper part of the right wall of the static pressure box 1.
The aperture square valve of the gas access pipeline I10 is 3000mm multiplied by 3000mm, the diameter of the circular valve is within 3000mm, and the pressure detection range is 0-1000 Pa; the control range of the gas regulating valve I11 is 0.1-600 m/h; carrying out dry year/h within the control range of 500-1000m on the gas regulating valve II 12; the pressure detection range of the detection port 30 is 0-10000 Pa. The MC-HGC1000 displacement sensor 7 is used for accurately measuring the deformation of the valve blade, and X, Y, Z three directions are added to move the slide rail lock 5, so that the MC-HGC1000 displacement sensor 7 moves and stops in the whole measurement static pressure box 1 to meet the measurement requirement.
The multifunctional ventilation valve flexibility test system and the test method adopt the following steps:
a. the detected air valve is arranged on an air valve connecting flange 8, the valve plate needs to be completely closed, and after the sealing of the connecting part is ensured, gas can be directly accessed to detect the leakage quantity and the deflection of the valve plate of the air valve, if the leakage quantity of the valve body of the air valve is detected, the flange on one side of the air valve needs to be sealed by a blind plate, and the sealing property is ensured;
b. the gas enters the wind turbine through the compressed air inlet 9 and then is divided into two paths, when a large-caliber wind valve is detected, a large-flow gas regulating valve II 12 is opened, a gas detection control valve II 15 is opened, the gas enters the wind turbine through a gas inlet pipeline I10, the wind speed is reduced through a flow stabilizing tapered pipe 22 after passing through a detection pipeline 21, the flow is equalized through a flow stabilizing pipeline 23 and a pore plate flow equalizer 24, the gas enters a cavity 1-1 in the static pressure box 1, and the equalized gas applies pressure to a valve plate and a valve body of the detected valve;
c. adjusting the gas regulating valve II 12 to enable the ELM110-OAC differential pressure sensor I16 or the ELM110-OAC differential pressure sensor II 17 to be selected according to the pressure regulating range, and recording the flow value of the flow meter II 20 after the pressure reaches a preset value to obtain the valve plate leakage amount or the valve body leakage amount of the air valve under the preset pressure; when the air valve with the caliber of less than 1200mm is detected, the first gas regulating valve 11 is opened, the first gas detection control valve 11 is opened, so that gas enters from the first gas access pipeline 10, the wind speed is reduced by the constant-flow reducing tapered pipe 22 after passing through the detection pipeline 18, the flow is equalized by the flow equalizer 24 after passing through the constant-flow pipeline 23, the equalized gas enters the static pressure box 1, and the equalized gas applies pressure to a valve plate and a valve body of the detected valve;
d. adjusting the gas regulating valve I11 to enable the ELM110-OAC differential pressure sensor I16 or the ELM110-OAC differential pressure sensor II 17 to select pressure to reach a preset value according to a pressure adjusting range, and then recording the flow value of the MF5700 thermal flowmeter 19 to obtain the valve plate leakage rate or the valve body leakage rate of the air valve under the preset pressure; when the deflection of the valve plate is detected, firstly unlocking X, Y, Z directions of the slide rail lock 5, selecting according to the required adjustment direction, driving the three-way slide rail 4 to move the MC-HGC1000 displacement sensor 7 to the outer edge of the axial center of the detected valve plate, then locking the slide rail lock 5, then regulating the pressure to a preset value according to the pressurization mode, recording the displacement value of the measured point of the valve plate before and after pressurization under the preset pressure, and finally calculating according to the length of the blade to obtain the deflection of the valve plate under the preset pressure;
e. if two sets of current flow access pipelines and two flow detection meters still can not meet the flow demand, detection ports 30 with access flow more than 1000m for heavy planting/h can be accessed to connect a detection and supply system meeting the actual demand so as to meet the detection demand.
The left side of the front wall of the static pressure box 1 is provided with a control box 26, an electric control circuit is arranged in the control box 26 and is communicated with each electric device by an electric wire, and the front side of the static pressure box is provided with a panel for displaying various detection data. The control circuit adopts PLC to carry out automatic control according to the programming. Feet 27 are arranged at the four corners of the bottom of the static pressure box 1.
The MF5700 thermal flowmeter 19 in the invention can also adopt a pore plate flowmeter or a vortex shedding flowmeter; the MC-HGC1000 displacement sensor 7 can also be measured using a dial gauge. All of which are within the scope of the present invention.
Claims (2)
1. A flexible test system and test method of multi-functional ventilation valve, including the static pressure case (1) of the flexible test system of the ventilation valve, characterized by that to equip with the upper cover (2) for the conical reducing of four sides on the upper end of the static pressure case (1), there are cavities (1-1) in the middle, the four outside of wall of the static pressure case (1) distribute and fix multiple strengthening ribs (1-2); an air valve connecting flange (8) is fixed on the upper cover (2); a pore plate current equalizer (24) is arranged in the cavity (1-1), a plurality of circular holes (24-1) are uniformly distributed on the circumference of the pore plate current equalizer (24), the front end of the pore plate current equalizer passes through a detection port (30) arranged in the middle of the front wall of the static pressure box (1), a first flange (25) is fixed on the detection port (30), a steady flow pipeline (23) is fixed on the first flange (25) by using the same flange, a second flange (28) is arranged at the other end of the steady flow pipeline (23), a steady flow reducing conical pipe (22) is arranged on the second flange (28) by using the same flange, a third flange (29) is arranged at the right end of the steady flow reducing conical pipe (22), a detection pipeline (21) is arranged on the third flange by using the same flange, and a second flowmeter (20) is arranged between the two third; a second gas detection control valve (15) is arranged in the middle of the detection pipeline (21); a compressed air inlet (9) is arranged at the lower part of the rear end of the right wall of the static pressure box (1), the compressed air inlet (9) is communicated with a first gas inlet pipeline (10), the first gas inlet pipeline (10) is communicated with a second gas regulating valve (12), the second gas regulating valve (12) is communicated with a second gas inlet pipeline (13) below, the first gas regulating valve (11) is arranged at the end, and a first gas detection control valve (14) and an MF5700 thermal flowmeter (19) are arranged on the first gas inlet pipeline (10) above; the upper parts of two sides of the left side wall of the static pressure box (1) are provided with slide rail seats (3), three-way slide rails (4) are arranged between the slide rail seats (3), a slide rail lock (5) is arranged on the three-way slide rails (4), a displacement sensor support (6) is fixed on the slide rail lock (5), and the end of the displacement sensor support (6) is provided with an MC-HGC1000 displacement sensor (7); the other end of the orifice plate flow equalizer (24) is provided with a detection port (30) in the middle of the rear wall of the static pressure box (1), and a first flange (25) is also arranged on the detection port (30); an ELM110-OAC differential pressure sensor I (16) and an ELM112-OAC differential pressure sensor II (17) are arranged at the middle upper part of the right wall of the static pressure tank (1).
2. A method of testing a multi-functional vent valve flexibility testing system in accordance with claim 1, comprising the steps of:
a. the detected air valve is arranged on an air valve connecting flange (8), the valve plate needs to be completely closed, and after the sealing of the connecting position is ensured, gas can be directly accessed to detect the leakage quantity and the deflection of the valve plate of the air valve, if the leakage quantity of the valve body of the air valve is detected, the flange on one side of the air valve needs to be sealed by a blind plate, and the sealing property is ensured;
b. the method comprises the following steps that gas enters a fan through a compressed air inlet (9) and then enters the fan in two ways, a large-flow gas regulating valve II (12) is opened when a large-diameter air valve is detected, a gas detection control valve II (15) is opened, the gas enters the fan through a gas inlet pipeline I (10), the wind speed is reduced through a flow stabilizing tapered pipe (22) after passing through a detection pipeline (21), the flow is equalized through a flow stabilizing pipeline (23) and a pore plate flow equalizer (24), the gas enters a cavity (1-1) in a static pressure box (1), and the equalized gas applies pressure to a valve plate and a valve body of the detected valve;
c. adjusting a gas regulating valve II (12) to enable an ELM110-OAC differential pressure sensor I (16) or the ELM110-OAC differential pressure sensor II (17) to be selected according to a pressure regulating range, and recording the flow value of a flow meter II (20) after the pressure reaches a preset value to obtain the valve plate leakage amount or the valve body leakage amount of the air valve under the preset pressure; when an air valve with the caliber of less than 1200mm is detected, a first gas regulating valve (11) is opened, a first gas detection control valve (11) is opened, gas enters from a first gas access pipeline (10), the wind speed is reduced by a constant-flow reducing tapered pipe (22) after passing through a detection pipeline (18), the flow is equalized by a pore plate current equalizer (24) after passing through a constant-flow pipeline (23), the equalized gas enters a static pressure box (1), and the pressure of the equalized gas is applied to a valve plate and a valve body of the detected valve;
d. adjusting a gas regulating valve I (11) to enable an ELM110-OAC differential pressure sensor I (16) or an ELM110-OAC differential pressure sensor II (17) to select pressure to reach a preset value according to a pressure adjusting range, and then recording the flow value of an MF5700 thermal flowmeter (19) to obtain the valve plate leakage amount or the valve body leakage amount of the air valve under the preset pressure; when the deflection of the valve plate is detected, firstly unlocking X, Y, Z directions of the slide rail lock (5), selecting according to the required adjustment direction, driving the three-way slide rail (4) to move the MC-HGC1000 displacement sensor (7) to the outer edge of the axial center of the detected valve plate, then locking the slide rail lock (5), then regulating the pressure to a preset value according to the pressurization mode, recording displacement values of a measured point of the valve plate before and after pressurization under preset pressure, and finally calculating the deflection of the valve plate under the preset pressure according to the length of the blade;
e. if two sets of current flow access pipelines and two flow detection meters still can not meet the flow demand, a detection port (30) with the access flow more than 1000m for plantation/h is accessed to a detection system meeting the actual demand so as to meet the detection demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347465.6A CN112345233A (en) | 2020-11-26 | 2020-11-26 | Multifunctional ventilation valve flexibility test system and test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011347465.6A CN112345233A (en) | 2020-11-26 | 2020-11-26 | Multifunctional ventilation valve flexibility test system and test method |
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| CN202011347465.6A Pending CN112345233A (en) | 2020-11-26 | 2020-11-26 | Multifunctional ventilation valve flexibility test system and test method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092095A (en) * | 2021-04-13 | 2021-07-09 | 泰州华业管道设备制造有限公司 | Blast gate pressure multifunctional test platform for air valve leakage amount |
| CN113155441A (en) * | 2021-04-06 | 2021-07-23 | 郭堂培 | Durability detection system and method for air valve for chemical industry |
-
2020
- 2020-11-26 CN CN202011347465.6A patent/CN112345233A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113155441A (en) * | 2021-04-06 | 2021-07-23 | 郭堂培 | Durability detection system and method for air valve for chemical industry |
| CN113155441B (en) * | 2021-04-06 | 2023-04-18 | 云南祥丰石化有限公司 | Durability detection system and method for air valve for chemical industry |
| CN113092095A (en) * | 2021-04-13 | 2021-07-09 | 泰州华业管道设备制造有限公司 | Blast gate pressure multifunctional test platform for air valve leakage amount |
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