Testing method of flexible testing system for multifunctional ventilation valves

Abstract

The present invention belongs to a testing method of a multifunctional ventilation valve flexible testing system, which is characterized in that the air valve to be tested is installed on the air valve connecting flange, the gas is divided into two ways to enter after passing through the compressed air inlet of the fan, and the gas regulating valve 2 is adjusted to make ELM110-OAC differential pressure sensor 1 or ELM110-OAC differential pressure sensor 2 selected according to the adjustment pressure range, and the gas regulating valve 1 is adjusted to make ELM110-OAC differential pressure sensor 1 or ELM110-OAC differential pressure sensor 2 selected according to the adjustment pressure range. After the pressure reaches the preset value, the flow value of the MF5700 thermal flow meter is recorded to obtain the air valve plate leakage or valve body leakage under the preset pressure. If the existing two sets of flow access pipelines and two flow detectors still cannot meet the flow demand, the detection port with a flow rate of more than 1000m³ / h is connected. The invention can flexibly select and test air valves of different calibers according to their performance parameters, ensure the detection accuracy and effectiveness, and solve the difficulty of large-caliber valve detection.

Description

Technical Field

[0001] The invention belongs to a testing method for a ventilation valve testing system, and in particular relates to a testing method for a multifunctional ventilation valve flexible testing system. Background Art

[0002] The key technical parameters of ventilation valves (hereinafter referred to as air valves) include valve plate air leakage, valve body air leakage and valve plate deflection. At present, these performance tests of air valves mainly rely on testing agencies, and it is difficult for testing agencies to complete the test for large-diameter valves. In addition, it costs a lot to transport large-diameter valves to testing agencies, and there are very few companies with testing capabilities. Due to the range and accuracy limitations of the testing equipment, the patent number CN110108647U authorized by the State Intellectual Property Office can detect other parameters except blade deflection, but the air supply system and measurement system are single and cannot complete the testing task of wide-diameter air valves. The patent with authorization number CN208831874U can only detect the air leakage of the air valve, but cannot detect the deflection of the valve. Summary of the invention

[0003] The purpose of the present invention is to solve the above-mentioned technical deficiencies and to provide a testing method for a multifunctional ventilation valve flexible testing system which adopts a square static pressure box in the testing system, on which is installed a reducing cover with a cavity in the middle, in which is installed a flow equalizer, and in front of the static pressure box are installed a flow-stabilizing reducing pipe, a flow-stabilizing pipe and other components.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a testing method of a ventilation valve flexibility testing system, characterized by taking the following steps:

[0005] a. Install the air valve to be tested on the air valve connecting flange, make sure the valve plate is completely closed, and ensure the connection is sealed. Then, directly connect the gas to test the air valve plate leakage and valve plate deflection. If testing the air valve body leakage, the flange on one side of the air valve needs to be sealed with a blind plate and ensure the sealing performance.

[0006] b. The gas enters through the compressed air inlet through the fan and is divided into two routes. When testing the large-diameter air valve, open the large-flow gas regulating valve 2 and the gas detection control valve 2 to allow the gas to enter from the gas access pipeline 1. After passing through the detection pipeline, the wind speed is reduced by the flow-stabilizing variable-diameter conical pipe. After passing through the flow-stabilizing pipeline, the flow is evenly distributed by the flow equalizer and then enters the cavity in the static pressure box. The evenly distributed gas exerts pressure on the valve plate and valve body of the valve being tested.

[0007] c. Adjust the gas regulating valve 2, so that the differential pressure sensor 1 or the differential pressure sensor 2 is selected according to the adjustment pressure range. After the pressure reaches the preset value, record the flow value of the flow meter 2 to obtain the leakage of the air valve plate or the valve body under the preset pressure; when detecting the air valve with a diameter below 1200mm, open the gas regulating valve 1, open the gas detection control valve 1, and let the gas enter from the gas access pipeline 1. After passing through the detection pipeline, the wind speed is reduced by the flow-stabilizing variable-diameter conical pipe, and after passing through the flow-stabilizing pipeline, the flow is equalized by the flow equalizer and then enters the static pressure box. The equalized gas exerts pressure on the valve plate and valve body of the valve being detected;

[0008] d. Adjust the gas regulating valve 1, so that the pressure difference sensor 1 or the pressure difference sensor 2 reaches the preset value according to the adjustment pressure range, and then record the flow value of the MF5700 thermal flow meter to obtain the leakage of the air valve plate or the valve body under the preset pressure; when detecting the deflection of the valve plate, first unlock the slide rail lock in the X, Y, and Z directions, and according to the required adjustment direction, drive the three-way slide rail to move the displacement sensor to the outer edge of the axial center of the valve plate to be detected, and then lock the slide rail lock, and then according to the above-mentioned pressurization method, adjust the pressure to the preset value and record the displacement value of the measured point of the valve plate before and after pressurization under the preset pressure, and finally calculate the deflection of the valve plate under the preset pressure according to the blade length;

[0009] e. If the existing two sets of flow access pipelines and two flow detectors still cannot meet the flow demand, then the detection interface with a flow rate of more than 1000m³ / h is connected to a detection system that meets the actual needs to meet the detection needs; the ventilation valve flexibility test system includes a static pressure box for the ventilation valve flexibility test system, an upper cover with conical reducers on four sides is installed at the upper end of the static pressure box, a cavity is provided in the middle, and a plurality of reinforcing ribs are distributed and fixed on the outside of the four walls of the static pressure box; a damper connecting flange is fixed on the upper cover; an orifice plate flow equalizer is installed in the cavity, a plurality of circular holes are evenly distributed on the circumference of the orifice plate flow equalizer, and the front end passes through the detection port provided in the middle of the front wall of the static pressure box, and flange one is fixed on the detection port, a flow stabilizing pipeline is fixed on flange one with the same flange, flange two is installed on the other end of the flow stabilizing pipeline, flange two is installed with a flow stabilizing reducing conical tube with the same flange, flange three is installed on the right end of the flow stabilizing reducing conical tube, a detection pipeline is installed on it with the same flange, and two same A flow meter 2 is installed between flange 3; a gas detection control valve 2 is installed in the middle of the detection pipeline; a compressed air access port is installed at the lower rear end of the right wall of the static pressure box, the compressed air access port is connected to the gas access pipeline 1, the gas access pipeline 1 is connected to the gas regulating valve 2, the gas regulating valve 2 is connected to the gas access pipeline 2 below, the end is equipped with a gas regulating valve 1, and the upper gas access pipeline 1 is equipped with a gas detection control valve 1 and a MF5700 thermal flow meter; slide rail seats are installed on the upper parts of both sides of the left side wall of the static pressure box, a three-way slide rail is installed between the slide rail seats, a slide rail lock is installed on the three-way slide rail, a displacement sensor support is fixed on the slide rail lock, and an MC-HGC1000 displacement sensor is installed on the end 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 a flange 1 is also installed on the detection port; ELM110-OAC differential pressure sensor 1 and ELM112-OAC differential pressure sensor 2 are installed in the upper middle part of the right wall of the static pressure box.

[0010] The beneficial effects of the present invention are: it can detect the air leakage of valve disc, air leakage of valve body and blade deflection of air valves with wide diameters and different shapes; for air valves with different diameters, the detection equipment can be flexibly selected according to their performance parameters to ensure the detection accuracy and effectiveness. It solves the difficulty of detecting large-diameter valves, and some detection systems cannot meet the requirements of all key parameter detection tasks of air valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The following is a detailed description of the embodiments with reference to the accompanying drawings.

[0012] Figure 1 It is a main three-dimensional diagram of the test method of the multifunctional ventilation valve flexibility test system;

[0013] Figure 2 yes Figure 1 3D rear view.

[0014] In the figure: 1-static pressure box; 1-1-cavity; 1-2-reinforcement rib; 2-upper cover; 3-slide rail seat; 4-three-way slide rail; 5-slide rail lock; 6-displacement sensor support; 7-MC-HGC1000 displacement sensor; 8-air valve connection flange; 9-compressed air inlet; 10-gas access pipeline 1; 11-gas regulating valve 1; 12-gas regulating valve 2; 13-gas access pipeline 2; 14-gas detection control valve 1; 15-gas detection control valve 2; 16-ELM110-OAC differential pressure sensor 1; 17-ELM110-OAC differential pressure sensor 2; 18-detection pipeline; 19-MF5700 thermal flowmeter; 20-flowmeter 2; 21-detection pipeline; 22-steady flow variable diameter tapered tube; 23-steady flow pipeline; 24-orifice plate flow equalizer; 24-1-round hole; 25-flange 1; 26-control box; 27-ground anchor; 28-flange 2; 29-flange 3; 30-detection port. DETAILED DESCRIPTION

[0015] Embodiment, with reference to the accompanying drawings, a test method for a ventilation valve flexibility test system is characterized by taking the following steps:

[0016] a. Install the air valve to be tested on the air valve connecting flange 8. The valve plate must be completely closed and the connection must be sealed. Then the gas can be directly connected to detect the leakage of the air valve plate and the deflection of the valve plate. If the leakage of the air valve body is to be tested, the flange on one side of the air valve must be sealed with a blind plate and the sealing must be ensured.

[0017] b. The gas enters through the compressed air inlet 9 through the fan and is divided into two routes. When testing the large-diameter air valve, the large-flow gas regulating valve 12 is opened, and the gas detection control valve 15 is opened to allow the gas to enter from the gas access pipeline 10. After passing through the detection pipeline 21, the wind speed is reduced by the steady-flow variable-diameter conical pipe 22. After passing through the steady-flow pipeline 23, the gas enters the cavity 1-1 in the static pressure box 1 after being evenly flowed by the orifice plate equalizer 24. The evenly flowed gas applies pressure to the valve plate and valve body of the valve being tested;

[0018] c. Adjust the gas regulating valve 12, so that the ELM110-OAC differential pressure sensor 16 or the ELM110-OAC differential pressure sensor 17 is selected according to the adjustment pressure range. After the pressure reaches the preset value, record the flow value of the flow meter 20 to obtain the leakage of the air valve plate or the valve body under the preset pressure; when detecting the air valve with a diameter below 1200mm, open the gas regulating valve 11, open the gas detection control valve 11, and let the gas enter from the gas access pipeline 10, and after passing through the detection pipeline 18, the wind speed is reduced by the steady flow reducing tapered pipe 22, and after passing through the steady flow pipeline 23, the flow is equalized by the flow equalizer 24 and then enters the static pressure box 1. The equalized gas applies pressure to the valve plate and valve body of the detected valve;

[0019] d. Adjust the gas regulating valve 11, so that the ELM110-OAC differential pressure sensor 16 or the ELM110-OAC differential pressure sensor 2 17, after the pressure reaches the preset value according to the adjustment pressure range, record the flow value of the MF5700 thermal flowmeter 19 to obtain the leakage of the air valve valve plate or the valve body under the preset pressure; when detecting the deflection of the valve plate, first unlock the slide rail lock 5 in the X, Y, and Z directions, and according to the required adjustment direction selection, drive the three-way slide rail 4 to move the MC-HGC1000 displacement sensor 7 to the outer edge of the axial center of the valve plate to be detected, and then lock the slide rail lock 5, and then according to the above-mentioned pressurization method, adjust the pressure to the preset value and record the displacement value of the measured point of the valve plate before and after pressurization under the preset pressure, and finally calculate the deflection of the valve plate under the preset pressure according to the blade length;

[0020] e. If the existing two sets of flow access pipelines and two flow detectors still cannot meet the flow demand, the detection port 30 with a flow rate of more than 1000m³ / h is connected to the detection and supply system that meets the actual needs to meet the detection needs; the ventilation valve flexibility test system includes a static pressure box 1 of the ventilation valve flexibility test system, an upper cover 2 with four conical diameters is installed on the upper end of the static pressure box 1, and a cavity 1-1 is arranged in the middle, and sixteen reinforcing ribs 1-2 are distributed and fixed on the outside of the four walls of the static pressure box 1; a damper connecting flange 8 is fixed on the upper cover 2; in the cavity 1 -1 is equipped with an orifice plate flow equalizer 24, and a plurality of circular holes 24-1 are evenly distributed on the circumference of the orifice plate flow equalizer 24. The front end passes through the detection port 30 set in the middle of the front wall of the static pressure box 1. A flange 1 25 is fixed to the detection port 30. A flow stabilizing pipeline 23 is fixed to the flange 1 25 with the same flange. A flange 28 is installed at the other end of the flow stabilizing pipeline 23. A flow stabilizing variable-diameter conical pipe 22 is installed on the flange 28 with the same flange. A flange 3 29 is installed on the right end of the flow stabilizing variable-diameter conical pipe 22, and a detection pipeline 21 is installed on it with the same flange. The detection pipeline 21 is fixed with the same two flanges. A flow meter 20 is installed between the flanges 29; a gas detection control valve 15 is installed in the middle of the detection pipeline 21; a compressed air inlet 9 is installed at the lower part of the rear end of the right wall of the static pressure box 1, the compressed air inlet 9 is connected to the gas access pipeline 10, the gas access pipeline 10 is connected to the gas regulating valve 12, the gas regulating valve 12 is connected to the lower gas access pipeline 13, the end is equipped with a gas regulating valve 11, the upper gas access pipeline 10 is equipped with a gas detection control valve 14 and a MF5700 thermal flow meter 19; in the static pressure box 1 Slide rail seats 3 are installed on the upper parts of both sides of the left side wall, three-way slide rails 4 are installed between the slide rail seats 3, slide rail locks 5 are installed on the three-way slide rails 4, displacement sensor holders 6 are fixed on the slide rail locks 5, and MC-HGC1000 displacement sensor 7 is installed on the end of the displacement sensor holder 6; the other end of the orifice 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 25 is also installed on the detection port 30; ELM110-OAC differential pressure sensor 16 and ELM112-OAC differential pressure sensor 2 17 are installed in the upper middle part of the right wall of the static pressure box 1.

[0021] The square valve of the gas access pipeline 10 has a diameter of 3000mm×3000mm, the diameter of the circular valve is within 3000mm, and the pressure detection range is 0-1000Pa; the control range of the gas regulating valve 11 is 0.1-600m³ / h; the control range of the gas regulating valve 2 12 is 500-1000m³ / h; the pressure detection range of the detection port 30 is 0-10000Pa. The MC-HGC1000 displacement sensor 7 can be used to accurately measure the deformation of the valve blade, and the slide rail lock 5 is added in the three directions of X, Y, and Z to make the MC-HGC1000 displacement sensor 7 move and stop in the entire measurement static pressure box 1 to meet the measurement requirements.

[0022] A control box 26 is installed on the left side of the front wall of the static pressure box 1. The control box 26 is equipped with an electrical control circuit, which is connected to various electrical components by wires. A panel is installed in front to display various detection data. The control circuit is automatically controlled by PLC according to programming. The four corners of the bottom of the static pressure box 1 are equipped with feet 27.

[0023] The MF5700 thermal flowmeter 19 in the present invention can also be an orifice flowmeter or a vortex flowmeter; the MC-HGC1000 displacement sensor 7 can also be measured using a dial indicator. All of the above belong to the protection scope of the present invention.

Claims

1. A testing method for a multifunctional ventilation valve flexibility testing system, characterized in that Take the following steps: a. Install the damper to be tested on the damper connection flange (8), make sure the valve plate is completely closed, and ensure the connection is sealed. Then, directly connect the gas to test the damper plate leakage and deflection. If the damper body leakage is to be tested, the flange on one side of the damper needs to be sealed with a blind plate and ensure the sealing performance. b. The gas enters through the compressed air inlet (9) through the fan and is divided into two paths. When testing a large-diameter air valve, the large-flow gas regulating valve 2 (12) is opened, and the gas detection control valve 2 (15) is opened to allow the gas to enter through the gas access pipeline 1 (10). After passing through the detection pipeline (21), the gas velocity is reduced by the flow-stabilizing variable-diameter conical pipe (22). After passing through the flow-stabilizing pipeline (23), the gas is evenly distributed through the orifice plate equalizer (24) and then enters the cavity (1-1) in the static pressure box (1). The evenly distributed gas exerts pressure on the valve plate and valve body of the valve being tested. c. Adjust the gas regulating valve 2 (12) so that the ELM110-OAC differential pressure sensor 1 (16) or the ELM110-OAC differential pressure sensor 2 (17) is selected according to the adjustment pressure range. After the pressure reaches the preset value, record the flow value of the flow meter 2 (20) to obtain the leakage of the air valve plate or the valve body under the preset pressure; when detecting an air valve with a diameter below 1200mm, open the gas regulating valve 1 (11), open the gas detection control valve 1 (11), and allow the gas to enter from the gas access pipeline 1 (10), and after passing through the detection pipeline (18), the wind speed is reduced by the flow-stabilizing variable-diameter conical pipe (22), and after passing through the flow-stabilizing pipeline (23), the flow is equalized by the orifice plate flow equalizer (24) and then enters the static pressure box (1). The equalized gas exerts pressure on the valve plate and valve body of the valve being detected; d. Adjust the gas regulating valve 1 (11) so that the ELM110-OAC differential pressure sensor 1 (16) or the ELM110-OAC differential pressure sensor 2 (17) reaches the preset value according to the pressure range, and then record the flow value of the MF5700 thermal flow meter (19) to obtain the leakage of the air valve plate or the valve body under the preset pressure; when detecting the deflection of the valve plate, first unlock the slide rail lock (5) in the X, Y, and Z directions, and according to the required adjustment direction, drive the three-way slide rail (4) to move the MC-HGC1000 displacement sensor (7) to the outer edge of the axial center of the valve plate to be detected, and then lock the slide rail lock (5); then, according to the above-mentioned pressurization method, adjust the pressure to the preset value and record the displacement value of the valve plate before and after the pressurization at the preset pressure. Finally, calculate the deflection of the valve plate under the preset pressure based on the blade length; e. If the existing two sets of flow access pipelines and two flow detectors still cannot meet the flow demand, the detection port (30) with a flow rate of more than 1000m³ / h is connected to a detection system that meets the actual demand to meet the detection demand; the multifunctional ventilation valve flexibility test system comprises a static pressure box (1) of the ventilation valve flexibility test system, an upper cover (2) with four conical diameters is installed at the upper end of the static pressure box (1), a cavity (1-1) is provided in the middle, and a plurality of reinforcing ribs (1-2) are distributed and fixed on the outside of the four walls of the static pressure box (1); a damper connecting flange (8) is fixed on the upper cover (2); an orifice plate flow equalizer ( 24), a plurality of circular holes (24-1) are evenly distributed on the circumference of the orifice plate flow equalizer (24), the front end of which passes through a detection port (30) provided in the middle of the front wall of the static pressure box (1), a flange 1 (25) is fixed on the detection port (30), a flow stabilizing pipe (23) is fixed on the flange 1 (25) by the same flange, a flange 2 (28) is installed on the other end of the flow stabilizing pipe (23), a flow stabilizing reducing conical pipe (22) is installed on the flange 2 (28) by the same flange, a flange 3 (29) is installed on the right end of the flow stabilizing reducing conical pipe (22), a detection pipe (21) is installed on the flange 3 by the same flange, and two flanges 3 (29) are installed on the detection pipe (21) by the same flange. ) is provided between the two ends of the static pressure box (1); a flow meter 2 (20) is provided between the two ends of the static pressure box (1); a gas detection control valve 2 (15) is provided in the middle of the detection pipeline (21); a compressed air inlet (9) is provided at the lower part of the rear end of the right wall of the static pressure box (1); the compressed air inlet (9) is connected to the gas access pipeline 1 (10); the gas access pipeline 1 (10) is connected to the gas regulating valve 2 (12); the gas regulating valve 2 (12) is connected to the gas access pipeline 2 (13) below; a gas regulating valve 1 (11) is provided at the end; a gas detection control valve 1 (14) and a MF5700 thermal flow meter (19) are provided on the upper gas access pipeline 1 (10); on the left side of the static pressure box (1) Slide rail seats (3) are installed at the upper part of both sides of the wall, three-way slide rails (4) are installed between the slide rail seats (3), slide rail locks (5) are installed on the three-way slide rails (4), displacement sensor holders (6) are fixed on the slide rail locks (5), and MC-HGC1000 displacement sensors (7) are installed at the ends of the displacement sensor holders (6); 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 1 (25) is also installed on the detection port (30); ELM110-OAC differential pressure sensor 1 (16) and ELM112-OAC differential pressure sensor 2 (17) are installed in the middle upper part of the right wall of the static pressure box (1).

Images