CN114755004B - Testing device and testing method for main valve disc lift force of steam release isolation valve - Google Patents
Testing device and testing method for main valve disc lift force of steam release isolation valve Download PDFInfo
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Abstract
A testing device and a testing method for lift force of a main valve disc of a steam release isolating valve belong to the technical field of valve testing and are used for testing the lift force of the valve disc under different air pressures and different valve openings. The whole testing device comprises a gas supply device, a transmission pipeline, a main valve system of the steam release isolation valve, a valve opening adjusting device, a displacement monitoring device, an air pressure monitoring device, a lift force monitoring device and a data acquisition system. The data acquisition system can realize acquisition, processing, storage and real-time data curve display of sensor signal data. The valve opening adjusting device is used for adjusting the opening of the valve, the displacement monitoring device can monitor the displacement of the valve rod, and the adjustment of the valve opening can be more accurate through data feedback. The air pressure detection device can detect the air pressure in the pipeline and at the inlet and the outlet of the valve in real time, and the lift force monitoring device is used for measuring the lift force of the valve disc in real time. The device has the advantages of simple structure and high precision, and provides guarantee for the test of the lift force of the main valve disc of the steam release isolating valve.
Description
Technical Field
The invention belongs to the technical field of valve testing, and relates to a testing device and a testing method for the lift force of a main valve disc of an isolation valve due to steam release.
Background
The steam release isolating valve belongs to one of safety valves, is usually arranged on a pipeline of a steam system, and is an extremely important valve. The steam release isolation valve is mainly applied to the nuclear power industry, and is one of important key devices of a nuclear power plant in order to prevent overpressure of a two-loop main steam system. The steam release isolation valve is generally composed of an electromagnetic pilot valve and a main valve, and the steam release isolation valve utilizes the spring force of a spring in the main valve to realize the sealing and the return seat of the valve. The steam release isolating valve may vibrate and jump in the opening and closing process, so that the abrasion and even deformation of a sealing surface, medium leakage and other serious consequences may be caused.
Because the steam release isolation valve is very important and the valve disc force is an important factor influencing the opening and closing and sealing performance of the spring direct-loading valve, the independent research on the valve disc lifting force of the main valve of the steam release isolation valve has very important significance. Therefore, it is necessary to invent a testing device and a testing method for the lift force of a valve disc of a safety valve.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the device and the method for testing the main valve disc lift force of the steam release isolation valve, which are simple in structure and high in precision. According to the invention, the opening of the valve disc is accurately adjusted by the mutual matching of the depth micrometer feeding mechanism and the laser displacement sensor, and the minimum movement scale is 0.1mm. And the test under the different atmospheric pressure intensity is realized through mutually supporting of air compressor and nitrogen gas jar.
In order to achieve the above object, the present invention provides the following.
The utility model provides a testing arrangement for steam release isolating valve main valve disc lift for measure the lift of valve disc under different atmospheric pressure, different valve opening, testing arrangement include air feeder, transmission line, steam release isolating valve main valve system, valve opening adjusting device, displacement monitoring device, atmospheric pressure monitoring devices, lift monitoring devices and data acquisition system.
The air supply device comprises an air compressor 1, a ball valve A3, a ball valve B4, a ball valve C7, a ball valve D18, a three-way connecting pipe 17, a pressure relief valve 6, a pressure gauge 20 and an air storage tank 19. A through hole for installing a connecting pipe is formed above the gas storage tank 19, the other end of the connecting pipe is connected with a three-way connecting pipe 17 through a ball valve D18, and the three-way connecting pipe 17 is also connected with a ball valve A3 and a ball valve B4 respectively; the ball valve A3 is communicated with the air compressor 1 through another pipeline. The air storage tank 19 is provided with a pressure release valve 6 and a pressure gauge 20. And a through hole is formed below the gas storage tank 19, and a ball valve C7 is installed. The initial end of the transmission pipeline is connected with the ball valve C7 through a flange, the tail end of the transmission pipeline is communicated with the main valve 13 of the steam release isolation valve through an inlet connecting pipe 22, and an air pressure sensor B12 is arranged between the inlet connecting pipe 22 and the transmission pipeline. The transmission pipeline is fixed on the same horizontal plane above the experiment table 21 through a pipeline support 9, and the pipeline support 9 is installed in a sliding groove of the experiment table 21. And an air pressure sensor A10 is arranged in the middle of the transmission pipeline. The main valve system of the steam release isolation valve comprises a main valve 13 of the steam release isolation valve, an outlet connecting pipe 14, a valve body bracket 23 and a silencer 16. The main valve 13 of the steam release isolation valve, the outlet connecting pipe 14 and the valve body bracket 23 are connected together through a double-end stud, and the valve body bracket 23 is arranged in a chute of the experiment table 21; the L-shaped outlet connecting pipe 14 is arranged at the bottom of the main valve 13 of the steam release isolating valve, and the other end of the L-shaped outlet connecting pipe is connected with a silencer 16 through a pressure sensor C15.
The air pressure monitoring device comprises an air pressure sensor A10, an air pressure sensor B12 and an air pressure sensor C15. The air pressure sensor A10 is used for detecting the air pressure change of the transmission pipeline, the air pressure sensor B12 is used for detecting the pressure of the inlet of the valve, and the air pressure sensor C15 is used for detecting the pressure of the outlet of the valve.
The valve opening adjusting device is used for accurately adjusting the opening of the main valve 13 of the steam release isolating valve and comprises a micrometer feeding mechanism 28, a sleeve 27, a bearing 36, a bearing cover 33, a connecting shaft 34 and a stop block 29. The micrometer feeding mechanism 28 is arranged in a groove of the support frame 26, a moving shaft of the micrometer feeding mechanism 28 penetrates through a round hole of the support frame 26, and the stop block 29 penetrates through the micrometer feeding mechanism 28 and is fixed on the support frame 26 and used for fixedly limiting the overall movement of the micrometer feeding mechanism 28. The sleeve 27 is connected with the tail end of a moving shaft of the micrometer feeding mechanism 28, the bearing 36 is installed in the sleeve 27, the bearing cover 33 is connected with the bearing 36 and used for limiting the up-and-down movement of the bearing 36 in the sleeve 27, the upper end of the connecting shaft 34 is in interference fit with an inner hole of the bearing 36, and the lower end of the connecting shaft is connected with the force sensor 31 and locked by the locking nut A30.
The displacement monitoring device comprises a laser displacement sensor 24, a laser sensor bracket 25 and a support 26 shaped like a Chinese character 'ji'. The laser displacement sensor support 25 is fixed on the inner side of the support frame 26 in a shape like a Chinese character 'ji', and the laser displacement sensor 24 is arranged on the laser displacement sensor support 25 through a double-end stud. The feedback of the valve opening degree is realized by measuring the distance between the circular aluminum sheet 37 and the valve. The support frame 26 is arranged at the upper end of the main valve 13 of the steam release isolation valve and is connected with the main valve 13 of the steam release isolation valve through threads.
The lifting force monitoring device is a force sensor 31 which is arranged on a valve rod 32 and used for detecting the lifting force of the main valve 13 of the steam release isolation valve.
The data acquisition system 51 comprises a data acquisition instrument 43 and an upper computer 48.
Further, the pipe support 9 includes a base 42, a lower fixing seat 41, an upper fixing seat 40, a buckle 38, and a buckle pin 39. The lower fixing seat 41 is connected with the base 42 through threads, the lower fixing seat 41 can move up and down in the base 42 through rotating external threads, and a proper supporting height can be selected through moving up and down similarly to a screw and nut mechanism. The upper fixing seat 40 and the lower fixing seat 41 are tightly buckled by the buckles 38, and the two buckles 38 are locked by the buckle pin 39.
Furthermore, in the lift force monitoring device, the force sensor 31 is connected with the valve rod 32 through threads and is locked by the locking nut B35, the circular aluminum sheet 37 is arranged between the locking nut B35 and the force sensor 31 and is used for receiving laser transmitted by the laser displacement sensor 24, and the laser displacement sensor 24 feeds back the valve opening height of the main valve 13 of the steam release isolation valve by measuring the distance between the laser displacement sensor 24 and the circular aluminum sheet 37.
Further, the data acquisition instrument 43 includes a power module 47, a force signal acquisition card 44, a displacement signal acquisition card 46, an air pressure signal acquisition card 45, and a sensor connection connector 49. The power module 47 mainly converts an external power source into a suitable voltage to supply power to the force signal acquisition card 44, the displacement signal acquisition card 46, the air pressure signal acquisition card 45, the air pressure sensor a10, the air pressure sensor B12, the air pressure sensor C15, the force sensor 31, and the laser displacement sensor 24. The force signal acquisition card 44 is mainly used for acquiring signals of the force sensor 31, the displacement signal acquisition card 46 is mainly used for acquiring signals of the laser displacement sensor 24, and the air pressure signal acquisition card 45 is used for acquiring signals of the air pressure sensor A10, the air pressure sensor B12 and the air pressure sensor C15. The sensor connector 49 may be connected to a connector of a sensor connection line to receive signals collected by the sensor and to supply power to the sensor. The signals collected by the force signal collecting card 44, the displacement signal collecting card 46 and the air pressure signal data collecting card 45 are transmitted to the upper computer 48 through the USB data line, and the upper computer 48 is provided with a matched program which can realize the collection, processing and storage of data.
A test method for the lift force of a main valve disc of a steam release isolation valve based on the test device comprises the following steps:
in the first step, the system is started, the opening of the main valve 13 of the steam release isolating valve is adjusted by the valve opening adjusting device, and the laser displacement sensor 24 is used for feeding back the adjusted distance to enable the steam release isolating valve to reach the required opening. And determining the height of the test pressure, inflating by using a nitrogen tank when performing the pressure test of 1-5MPA, inflating by using the air compressor 1 when performing the pressure test of 0-1MPA, and judging whether the pressure in the air storage tank 19 reaches the set pressure or not by using the pressure gauge 20 until the set pressure is reached, thereby completing inflation.
And secondly, opening the ball valve C7 and the gas storage tank 19 to start to convey gas outwards, starting to discharge gas outwards from the main valve 13 of the steam release isolation valve, starting to collect signals of the force sensor 31 by using the force signal acquisition card 44, starting to collect data of the laser displacement sensor 24 by using the displacement signal acquisition card 46, starting to collect data of the air pressure sensor A10, the air pressure sensor B12 and the air pressure sensor C15 by using the air pressure signal acquisition card 45, and transmitting the collected data to the upper computer 48 through the USB data line.
And thirdly, the upper computer 48 processes the transmitted data, displays the lift curve, the air pressure curve and the displacement curve in real time and stores the processed data. And changing the opening height of the valve or changing the pressure, and inflating again for experimental test. And (5) performing all the experimental tests of different parameters, closing the test system and finishing the test. After all experiments are finished, research and analysis are carried out according to the collected data and a data curve displayed by the upper computer 48, and the lifting force characteristic of the valve disc of the main valve 13 of the steam release isolating valve is obtained, and other subsequent performances related to the lifting force characteristic are obtained.
The technical scheme of the invention is mainly embodied as follows:
(1) The testing device is suitable for testing the valve disc lift force of the valve similar to the main valve of the steam release isolation valve, and the whole testing device is simple in structure and easy to realize.
(2) This testing arrangement passes through valve opening adjusting device and can then change the aperture of steam release isolation valve main valve through removing the valve rod to thereby the laser displacement sensor can feed back the distance that the valve rod removed and know the aperture of steam release isolation valve main valve, can adjust 0.1mm at every turn minimum, makes the regulation of valve opening more accurate.
(3) This testing arrangement's pipeline bracket can reciprocate down the fixing base through the external screw thread of fixing base under rotating to realize pipeline bracket's holding height, pipeline bracket convenient to install is dismantled moreover, and upper and lower fixing base blocks through the buckle and compresses tightly, and two buckles pin through the buckle and pin to pin.
(4) This test dress can carry out the experimental test of different parameters, can adjust different valve openness through valve opening adjusting device, tests different little pressure test through air compressor, aerifys through the nitrogen cylinder and carries out the test of higher pressure.
(5) The testing device adopts the acquisition card to acquire signals of the displacement sensor, the air pressure sensor and the force sensor, and has higher acquisition precision and convenient acquisition. The upper computer is provided with a matched program for processing and storing data and displaying a data curve in real time, and the data visualization effect is good.
Drawings
FIG. 1 is a general block diagram of a test set for the lift of a main valve disc of a vapor release isolation valve;
FIG. 2 is a schematic structural view of a valve opening adjusting device and a force and displacement monitoring device;
FIG. 3 is a schematic structural view of a pipe rack;
FIG. 4 is a schematic diagram of the data system acquisition system;
FIG. 5 is a signal flow diagram of a data acquisition system;
FIG. 6 is a flow chart of the operation of the main valve disc lift test device of the steam release isolation valve;
in the figure: 1 an air compressor; 2, connecting a pipe A;3, a ball valve A;4, a ball valve B;5, connecting the pipe B;6, a pressure relief valve; 7, a ball valve C;8, conveying a pipeline A;9, a pipeline bracket; 10, an air pressure sensor A;11 a conveying pipeline B;12 air pressure sensor B;13 a main valve of a steam release isolation valve; 14 an outlet connecting tube; 15, a gas pressure sensor C;16 a muffler; 17, a three-way connecting pipe; 18 a ball valve D;19 an air storage tank; 20 pressure gauge; 21, a test bed; 22 an inlet connecting pipe; 23 a valve body support; 24 laser displacement sensors; 25 laser displacement sensor support; 26 support in a shape of Chinese character 'ji'; 27 a sleeve; a 28 micrometer feed mechanism; 29, a stop block; 30, locking a nut A;31 a force sensor; a 32-valve stem; 33 a bearing cap; 34 connecting the shafts; 35 locking nut B;36 bearings; 37 round aluminum sheet; 38, buckling; 39 a bayonet pin; 40, fixing a base; 41 lower fixed seats; 42 a base; 43 a data acquisition instrument; 44 force signal acquisition card; 45 air pressure signal acquisition card; 46 displacement signal acquisition card; 47 a power supply module; 48, an upper computer; 49 sensor connection joints; 50USB connector; 51 a data acquisition system.
Detailed Description
The invention is described in more detail below with reference to the accompanying drawings:
the general structure diagram of a valve disc force testing device for a main valve of a steam release isolation valve is shown in figure 1, and the device comprises a gas supply device, a transmission pipeline, a main valve system of the steam release isolation valve, a valve opening adjusting device, a displacement monitoring device, an air pressure monitoring device, a lift force monitoring device and a data acquisition system.
The air supply device comprises an air compressor 1, a connecting pipe A2, a ball valve A3, a three-way connecting pipe 17, a ball valve B4, a ball valve D18, a connecting pipe B5, an air storage tank 19, a pressure release valve 6, a ball valve C7 and a pressure gauge 20. Air compressor 1 be connected with ball valve A3 through connecting pipe A2 (air compressor 1 passes through threaded connection with connecting pipe A2, connecting pipe A2 passes through threaded connection with ball valve A3), ball valve A3 passes through threaded connection with tee junction pipe 17, ball valve B4's one end passes through threaded connection with tee junction pipe 17, ball valve D18 passes through the screw thread with tee junction pipe 17, connecting pipe B5 passes through threaded connection with ball valve D18, connecting pipe B5 passes through threaded connection with gas holder 19, relief valve 6, manometer 20 passes through threaded connection with gas holder 19, relief valve 6 is used for protecting gas holder 19's safety. The pressure gauge 20 can monitor the gas pressure in the gas storage tank 19, and one end of the ball valve C7 is connected with the gas storage tank 19 through threads. When carrying out little pressure test, aerify with air compressor 1, when carrying out great pressure test, utilize the nitrogen cylinder to aerify, the nitrogen cylinder is connected with the other end of ball valve B4 and is aerifyd, and air compressor generally can not provide great pressure.
The transmission pipeline comprises a transmission pipeline A8, a transmission pipeline B11, a pipeline bracket 9 and an inlet connecting pipe 22. One end of the transmission pipeline A8 is connected with the other end of the ball valve C7 through a flange, the transmission pipeline A8 and the transmission pipeline B11 are connected together through an air pressure sensor A10, the transmission pipeline B11 and the inlet connecting pipe 22 are connected together through an air pressure sensor B12, the pipeline support 9 is used for supporting the transmission pipeline, and the pipeline support 9 is installed in a sliding groove of the experiment table 21.
The main valve system of the steam release isolation valve comprises a main valve 13 of the steam release isolation valve, an outlet connecting pipe 14, a valve body bracket 23 and a silencer 16. The main valve 13 of the steam release isolation valve, the outlet connecting pipe 14 and the valve body support 23 are connected together through a double-end stud, the valve body support 23 is installed in a chute of the experiment table 21, and the silencer 16 is connected with the outlet connecting pipe 14 through a pressure sensor C15. The silencer 16 can attenuate the noise generated when the gas is discharged, especially when high pressure experiments are performed.
The structure schematic diagram of the valve opening adjusting device and the force and displacement monitoring device is shown in fig. 2. Specifically, the method comprises the following steps:
the valve opening adjusting device comprises a micrometer feeding mechanism 28, a sleeve 27, a bearing 36, a bearing cover 33, a connecting shaft 34 and a stop block 29. The valve opening adjusting means may be used to precisely adjust the opening of the main valve 13 of the steam release isolation valve. The micrometer feeding mechanism 28 is arranged in a groove of the support frame 26, a moving shaft of the micrometer feeding mechanism 28 penetrates through a round hole of the support frame 26, and the stop block 29 penetrates through the micrometer feeding mechanism 28 and is fixed on the support frame 26 through screws for fixing and limiting the whole movement of the micrometer feeding mechanism 28. The sleeve 27 is connected with the tail end of a moving shaft of the micrometer feeding mechanism 28 through threads, the bearing 36 is installed in the sleeve 27, the bearing cover 33 is connected with the bearing 36 through threads to limit the up-and-down movement of the bearing 36 in the sleeve 27, the upper end of the connecting shaft 34 is in interference fit with an inner hole of the bearing 36, and the lower end of the connecting shaft is connected with the force sensor 31 through threads and is locked through the locking nut A30. When the valve opening adjusting device works, the upper end knob of the micrometer feeding mechanism 28 is rotated, the moving shaft of the micrometer feeding mechanism 28 rotates around the axis and moves up and down, so that the valve rod 32 is driven to move up and down, and the main valve 13 of the steam release isolating valve is opened at different openings.
The displacement monitoring device comprises a laser displacement sensor 24, a laser sensor bracket 25 and a support 26 shaped like a Chinese character 'ji'. The laser displacement sensor support 25 is fixed on the inner side of the support 26 in a shape like a Chinese character 'ji' by screws, and the laser displacement sensor 24 is installed on the laser displacement sensor support 25 by a stud. Laser displacement sensor 24's laser shines on circular aluminum sheet 37, can measure self and circular aluminum sheet 37's distance, because circular aluminum sheet 37 links together with valve rod 32, when micrometer feed mechanism 28 governing valve aperture, circular aluminum sheet 37 moves up and down along with valve rod 32, laser displacement sensor 24 also changes with circular aluminum sheet 37's distance, can know through the feedback of laser displacement sensor 24 data whether the aperture of the valve of micrometer feed mechanism 28 regulation is correct, make the regulation of the valve aperture of steam release isolating valve main valve 13 more accurate.
The air pressure monitoring device comprises an air pressure sensor A10, an air pressure sensor B12 and an air pressure sensor C15. The air pressure sensor A10 is connected with the transmission pipeline A8 and the transmission pipeline B11 through screws and used for detecting air pressure change of the transmission pipeline, the air pressure sensor B12 is connected with one end of the inlet connecting pipe 22 through a screw and used for detecting pressure of the inlet of the valve, and the air pressure sensor C15 is connected with one end of the outlet connecting pipe 14 through a screw and used for detecting pressure of the outlet of the valve.
The lifting force monitoring device is a force sensor 31 arranged on a valve rod 32 and used for detecting the lifting force of the main valve 13 of the steam release isolation valve. The method comprises the following specific steps: the force sensor 31 is screwed to the valve stem 32 and is secured by a retaining nut B35, between which B35 and the force sensor 31 is a circular aluminium sheet 37. When the valve disc of the main valve 13 of the steam release isolation valve is acted by exhaust gas, the valve disc is acted on the force sensor 31 through the valve rod 32, and therefore the lift force of the valve disc is measured.
The schematic structural diagram of the data acquisition system is shown in fig. 4, and includes a data acquisition instrument 43 and an upper computer 48. The data acquisition instrument 43 comprises a power module 47, a force signal acquisition card 44, a displacement signal acquisition card 46, an air pressure signal acquisition card 45, a sensor connecting joint 49 and a USB interface 50. The power module 47 mainly converts an external power source into a suitable voltage to supply power to the force signal acquisition card, the displacement signal acquisition card 46, the air pressure signal acquisition card 45, the air pressure sensor a10, the air pressure sensor B12, the air pressure sensor C15, the force sensor 31, and the laser displacement sensor 24. The force signal acquisition card 44 is mainly used for acquiring signals of the force sensor 31, the displacement signal acquisition card 46 is mainly used for acquiring signals of the laser displacement sensor 24, and the air pressure signal acquisition card 45 is used for acquiring signals of the air pressure sensor A10, the air pressure sensor B12 and the air pressure sensor C15. The sensor connector 49 may be connected to a connector of a sensor connection line to receive signals collected by the sensor and to supply power to the sensor. Signals acquired by the force signal acquisition card 44, the displacement signal acquisition card 46 and the air pressure signal data acquisition card 45 are transmitted to the upper computer 48 through the USB data line, and the upper computer 48 is provided with a matched program which can realize the acquisition, processing and storage of data and display a data curve in real time. The signal flow chart of the data acquisition system is that the 220V power supply voltage shown in FIG. 5 is converted into 24 voltage through the power supply module to supply power for the laser displacement sensor 24, the force sensor 31 and the air pressure sensor. The signal data of the laser displacement sensor 24, the force sensor 31 and the air pressure sensor are respectively transmitted to a displacement signal acquisition card 46, a force signal acquisition card 44 and an air pressure signal acquisition card 45 through sensor connecting wires, a USB data wire connects an upper computer 48 and a data acquisition instrument 43 through a USB connector 50, and the data acquisition card transmits the data to the upper computer together through the USB data wire.
The structural schematic diagram of the pipe support is shown in fig. 3, and includes a base 42, a lower fixing seat 41, an upper fixing seat 40, a buckle 38, and a buckle pin 39. Base 42 installs in the spout of laboratory bench 21, and lower fixing base 41 passes through threaded connection with the base, goes up fixing base 40 and aligns after the lock with lower fixing base 41 and detains through buckle 38 and compress tightly, and in buckle pin 39 was used for the pinhole of disect insertion buckle 38, it is specific: the lower fixing seat 41 is connected with the base 42 through threads, the lower fixing seat 41 can move up and down in the base 42 through rotating external threads, and a proper supporting height can be selected through moving up and down similarly to a screw and nut mechanism. The upper fixing seat 40 and the lower fixing seat 41 are tightly buckled by the buckles 38, and the two buckles 38 are locked by the buckle pin 39. The novel structure not only facilitates the adjustment of the supporting height, but also facilitates the disassembly, and only the buckling pin 39 needs to be pulled out, and the buckling pin 38 needs to be removed.
A test method for the lift force of a main valve disc of a steam release isolating valve is characterized in that a data acquisition system is started when a test is started, the opening degree of the valve is adjusted, then test pressure is determined, an air compressor 1 is used for inflation in a small pressure test, a nitrogen cylinder is used for inflation in a large pressure test, a ball valve C7 is opened after the inflation is completed, an acquisition card starts to acquire signal data of air pressure, displacement and force sensors, an upper computer 48 starts to process and store the signal data, the data are displayed in real time, parameters are changed for re-experiment, if the opening degree of the valve is selected according to the parameters, the experiment is started again from the opening degree of an adjusting valve, if the air pressure is selected according to the parameters, the experiment is started again after the test pressure is determined, all the experiments are completed, and the test is finished, and the method specifically comprises the following steps:
firstly, starting the system, adjusting the opening of the main valve 13 of the steam release isolating valve through a valve opening adjusting device, and feeding back the adjusted distance by using a laser displacement sensor 24 to enable the steam release isolating valve to reach the required opening. The pressure testing method comprises the steps of determining the height of testing pressure, inflating by adopting a nitrogen tank when a large pressure test is carried out, inflating by only using an air compressor 1 when a small pressure test is carried out, judging whether the pressure in an air storage tank 19 reaches the set pressure through a pressure gauge 20, and completing inflation until the set pressure is reached.
And secondly, opening the ball valve C7 and the gas storage tank 19 to start to convey gas outwards, starting to discharge gas outwards from the main valve 13 of the steam release isolation valve, starting to collect signals of the force sensor 31 by the force signal collection card 44, starting to collect data of the laser displacement sensor 24 by the displacement signal collection card 46, starting to collect data of the air pressure sensor A10, the air pressure sensor B12 and the air pressure sensor C15 by the air pressure signal collection card 45, and transmitting the collected data to the upper computer 48 through the USB data line.
And thirdly, the upper computer 48 processes the transmitted data, displays the lift curve, the air pressure curve and the displacement curve in real time and stores the processed data. And changing the opening height of the valve or changing the excrement pressure, and inflating again for experimental testing. And (5) performing all the experimental tests of different parameters, closing the test system and finishing the test.
The description is only intended to illustrate the implementation of the technical solution, and the protection scope of the invention should not be limited to the specific form described in the embodiment, and the equivalent technical means should be designed by those skilled in the art according to the technical method.
Claims (4)
1. A testing device for the lift force of a valve disc of a main valve of a steam release isolation valve is used for measuring the lift force of the valve disc under different air pressures and different valve openings and is characterized in that the testing device comprises an air supply device, a transmission pipeline, a main valve system of the steam release isolation valve, a valve opening adjusting device, a displacement monitoring device, an air pressure monitoring device, a lift force monitoring device and a data acquisition system;
the air supply device comprises an air compressor (1), a ball valve A (3), a ball valve B (4), a ball valve C (7), a ball valve D (18), a three-way connecting pipe (17), a pressure relief valve (6), a pressure gauge (20) and an air storage tank (19); a through hole for installing a connecting pipe is formed above the gas storage tank (19), the other end of the connecting pipe is connected with a three-way connecting pipe (17) through a ball valve D (18), and the three-way connecting pipe (17) is also connected with a ball valve A (3) and a ball valve B (4) respectively; the ball valve A (3) is communicated with the air compressor (1) through another pipeline; a pressure relief valve (6) and a pressure gauge (20) are arranged on the air storage tank (19); a through hole is arranged below the gas storage tank (19), and a ball valve C (7) is installed; the starting end of the transmission pipeline is connected with the ball valve C (7) through a flange, the tail end of the transmission pipeline is communicated with a main valve (13) of the steam release isolation valve through an inlet connecting pipe (22), and an air pressure sensor B (12) is arranged between the inlet connecting pipe (22) and the transmission pipeline; the transmission pipeline is fixed at the same horizontal plane above the experiment table (21) through a pipeline support (9), and the pipeline support (9) is arranged in a sliding groove of the experiment table (21); an air pressure sensor A (10) is arranged in the middle of the transmission pipeline; the main valve system of the steam release isolation valve comprises a main valve (13) of the steam release isolation valve, an outlet connecting pipe (14), a valve body bracket (23) and a silencer (16); the main valve (13) of the steam release isolation valve, the outlet connecting pipe (14) and the valve body bracket (23) are connected together through a double-end stud, and the valve body bracket (23) is arranged in a sliding groove of the experiment table (21); the outlet connecting pipe (14) is arranged at the bottom of a main valve (13) of the steam release isolation valve, and the other end of the outlet connecting pipe is connected with a silencer (16) through an air pressure sensor C (15);
the air pressure monitoring device comprises an air pressure sensor A (10), an air pressure sensor B (12) and an air pressure sensor C (15); the air pressure sensor A (10) is used for detecting air pressure change of a transmission pipeline, the air pressure sensor B (12) is used for detecting the pressure of an inlet of the valve, and the air pressure sensor C (15) is used for detecting the pressure of an outlet of the valve;
the valve opening adjusting device is used for accurately adjusting the opening of a main valve (13) of the steam release isolating valve and comprises a micrometer feeding mechanism (28), a sleeve (27), a bearing (36), a bearing cover (33), a connecting shaft (34) and a stop block (29); the micrometer feeding mechanism (28) is arranged in a groove of the support frame (26), a moving shaft of the micrometer feeding mechanism (28) penetrates through a round hole of the support frame (26), and a stop block (29) penetrates through the micrometer feeding mechanism (28) and is fixed on the support frame (26) and used for fixedly limiting the integral movement of the micrometer feeding mechanism (28); the micrometer feeding mechanism is characterized in that the sleeve (27) is connected with the tail end of a moving shaft of the micrometer feeding mechanism (28), a bearing (36) is installed in the sleeve (27), a bearing cover (33) is connected with the bearing (36) and used for limiting the up-and-down movement of the bearing (36) in the sleeve (27), the upper end of a connecting shaft (34) is in interference fit with an inner hole of the bearing (36), and the lower end of the connecting shaft is connected with a force sensor (31) and locked by a locking nut A (30);
the displacement monitoring device comprises a laser displacement sensor (24), a laser displacement sensor bracket (25) and a support frame (26) shaped like a Chinese character 'ji'; the laser displacement sensor support (25) is fixed on the inner side of the support frame (26) in a shape like a Chinese character 'ji', and the laser displacement sensor (24) is arranged on the laser displacement sensor support (25) through a double-end stud;
in the lift force monitoring device, a force sensor (31) is connected with a valve rod (32) through threads and locked by a locking nut B (35), a round aluminum sheet (37) is arranged between the locking nut B (35) and the force sensor (31) and used for receiving laser transmitted by a laser displacement sensor (24), and the laser displacement sensor (24) feeds back the valve opening height of a main valve (13) of a steam release isolating valve by measuring the distance between the laser displacement sensor and the round aluminum sheet (37) so as to realize the feedback of the valve opening degree; the support frame (26) is arranged at the upper end of the main valve (13) of the steam release isolation valve and is connected with the main valve (13) of the steam release isolation valve;
the lifting force monitoring device is a force sensor (31) which is arranged on the valve rod (32) and used for detecting the lifting force of the main valve (13) of the steam release isolating valve;
the data acquisition system (51) comprises a data acquisition instrument (43) and an upper computer (48).
2. The device for testing the lift force of the main valve disc of the steam release isolation valve is characterized in that the pipeline bracket (9) comprises a base (42), a lower fixed seat (41), an upper fixed seat (40), a buckle (38) and a buckle pin (39); the lower fixing seat (41) is connected with the base (42) through threads, the lower fixing seat (41) moves up and down in the base (42) through rotating external threads, and a proper supporting height is selected through moving up and down similarly to a screw and nut mechanism; the upper fixing seat (40) and the lower fixing seat (41) are pressed and buckled through the buckles (38), and the two buckles (38) are locked through the buckle pin (39).
3. The device for testing the lift force of the main valve disc of the steam release isolation valve is characterized in that the data acquisition instrument (43) comprises a power supply module (47), a force signal acquisition card (44), a displacement signal acquisition card (46), an air pressure signal acquisition card (45) and a sensor connecting joint (49); the power supply module (47) mainly converts an external power supply into proper voltage to supply power to the force signal acquisition card (44), the displacement signal acquisition card (46), the air pressure signal acquisition card (45), the air pressure sensor A (10), the air pressure sensor B (12), the air pressure sensor C (15), the force sensor (31) and the laser displacement sensor (24); the force signal acquisition card (44) is mainly used for acquiring signals of the force sensor (31), the displacement signal acquisition card (46) is mainly used for acquiring signals of the laser displacement sensor (24), and the air pressure signal acquisition card (45) is used for acquiring signals of the air pressure sensor A (10), the air pressure sensor B (12) and the air pressure sensor C (15); the sensor connecting joint (49) is connected with a joint of a sensor connecting wire so as to receive the acquisition signal of the sensor and transmit power to the sensor; signals acquired by the force signal acquisition card (44), the displacement signal acquisition card (46) and the air pressure signal acquisition card (45) are transmitted to an upper computer (48) through a USB data line, and the upper computer (48) is provided with a matched program to realize data acquisition, processing and storage.
4. A method for testing the lift of a main valve disc of a steam release isolation valve based on the testing device of claim 3, comprising the steps of:
the method comprises the following steps that firstly, a system is started, the opening of a main valve (13) of a steam release isolation valve is adjusted through a valve opening adjusting device, and a laser displacement sensor (24) is used for feeding back an adjusted distance to enable the adjusted distance to reach the required opening; determining the height of the test pressure, inflating by using a nitrogen tank when performing a pressure test of 1-5MPA, inflating by using an air compressor (1) when performing a pressure test of 0-1MPA, judging whether the pressure in an air storage tank (19) reaches the set pressure through a pressure gauge (20), and completing inflation until the set pressure is reached;
secondly, opening a ball valve C (7) and a gas storage tank (19) to start to convey gas outwards, starting to discharge gas outwards from a main valve (13) of the steam release isolation valve, starting to collect signals of a force sensor (31) by a force signal collection card (44), starting to collect data of a laser displacement sensor (24) by a displacement signal collection card (46), starting to collect data of a pressure sensor A (10), a pressure sensor B (12) and a pressure sensor C (15) by a pressure signal collection card (45), and transmitting the collected data to an upper computer (48) through a USB data line;
thirdly, the upper computer (48) processes the transmitted data, displays a lift curve, an air pressure curve and a displacement curve in real time and stores the processed data; changing the opening height of the valve or changing the pressure, and inflating again for experimental testing; after all the experimental tests of different parameters are finished, the testing device is closed, and the test is finished; after all experiments are finished, research and analysis are carried out according to the collected data and a data curve displayed by the upper computer (48) to obtain the lift force characteristic of the valve disc of the main valve (13) of the steam release isolating valve and carry out subsequent analysis on other performances related to the valve disc.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210425179.XA CN114755004B (en) | 2022-04-22 | 2022-04-22 | Testing device and testing method for main valve disc lift force of steam release isolation valve |
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| CN202210425179.XA CN114755004B (en) | 2022-04-22 | 2022-04-22 | Testing device and testing method for main valve disc lift force of steam release isolation valve |
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| CN103852245B (en) * | 2012-12-04 | 2016-09-14 | 华东理工大学 | A kind of assay device testing safety valve thermal mechanical performance and test method |
| DE102018111010B3 (en) * | 2018-05-08 | 2019-07-25 | WESA-Control GmbH & Co. KG | Method for setting a closing force of a fitting and fitting measurement method |
| CN109084972B (en) * | 2018-07-26 | 2019-08-09 | 大连理工大学 | A kind of test device and test method for safety valve valve disc lift |
| CN108801626B (en) * | 2018-09-11 | 2019-08-13 | 大连理工大学 | A kind of test device and test method for spring loaded safety valve dynamic characteristic |
| CN112728417A (en) * | 2020-12-25 | 2021-04-30 | 中核武汉核电运行技术股份有限公司 | Online diagnosis device and method for main steam isolation valve of nuclear power plant |
| CN113945376B (en) * | 2021-10-28 | 2022-06-28 | 大连理工大学 | Device and method for testing dynamic performance of pilot-operated steam release isolation valve for nuclear power |
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