A high-altitude valve fatigue test equipment with a wide range of tests

Abstract

The present invention discloses a height valve fatigue test equipment with a wide test range in the field of height valve fatigue test equipment, including a vibration table and an action mechanism, wherein the action mechanism includes a base arranged above the vibration table, and a back plate is fixedly connected to the middle part above the base. The vibration table is used to provide vibration working conditions, which can better simulate the actual bumpy working state of the height valve, so that the fatigue test data is closer to the actual working state. During the fatigue test, the height valve can be driven by the rotating mechanism to change the stroke, thereby causing the angle to change, so that the test is closer to the actual working state. By setting four sensors to cooperate with the induction sheet to control the stroke of the lifting cylinder, the corresponding sensors are controlled by the PLC program to adjust the stroke of the lifting cylinder and achieve the purpose of changing the stroke.

Description

Technical Field

[0001] The invention relates to the field of altitude valve fatigue test equipment, in particular to altitude valve fatigue test equipment with a wide testing range. Background Art

[0002] During the operation of rail vehicles or when passengers get on and off, changes in vehicle load will cause changes in the height of the vehicle body relative to the rail surface. In order to keep the vehicle body at a certain height, when the vehicle body load changes, the height of the vehicle body will be adjusted by charging or exhausting air to the air spring through the height valve. Therefore, whether the height valve can work properly will affect the comfort of passengers and the stability of rail vehicles.

[0003] At present, most of the height valves are imported. In order to achieve localization, several domestic companies are currently developing height valves. The developed height valves must be tested for fatigue before being put on the vehicle for testing. However, most of the current fatigue test equipment can only achieve smooth action and the same mode action, and cannot simulate the actual vibration working conditions and variable stroke working conditions. In addition, the current fatigue test equipment has a low action frequency, which does not exceed 40,000 times a day, resulting in a long test cycle. At the same time, the number of height valves that can be installed is also small, and it is impossible to achieve fatigue testing of a large number of height valves at the same time. Therefore, the current height valve fatigue test equipment has the disadvantages of low efficiency, few workstations, single action, and no vibration. Therefore, there is an urgent need for a height valve fatigue test equipment with a wide test range. Summary of the invention

[0004] The purpose of the present invention is to provide a height valve fatigue test equipment with a wide test range to solve the problems raised in the above-mentioned background technology, to achieve self-contained vibration, variable stroke, high frequency, multiple stations, and ultimately achieve variable angle height valve fatigue test through variable stroke.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-valve fatigue test equipment with a wide test range includes a vibration table and an action mechanism, the action mechanism includes a base arranged above the vibration table, a back plate is fixedly connected to the middle part above the base, reinforcing ribs are welded between the bottom of the back plate and the base, sliders are vertically distributed in the middle part of both side walls above the back plate, the sliders are connected to the back plate by bolts, there are four sliders in total, the sliders on both sides are slidably connected to slide rails, a connecting plate is fixedly connected above the slide rails, and the connecting plate and the two slide rails form an inverted U-shaped structure.

[0007] As a further solution of the present invention: a lifting cylinder is fixedly connected to the bottom of the slide rail on one side, and the lifting cylinder is connected to the base by screws; the lifting cylinder provides power for the lifting movement of the slide rail; a sensor is arranged on one side of the bottom end of the slide rail above the back plate, and there are four sensors, and the two middle sensors form a pair, and the upper and lower sensors form another pair; selecting four sensors and pairing them in pairs can enable the lifting cylinder to change the stroke extension and retraction, and the operation of the sensors is controlled by the PLC controller; when the uppermost and lowermost pairs are working, the middle pair of sensors is closed When the sensing plate touches the lowermost sensor, the sensing signal is transmitted to the PLC controller, and the PLC controller controls the lifting cylinder to extend; when the sensing plate touches the uppermost sensor, the sensing signal is transmitted to the PLC controller, and the PLC controller controls the lifting cylinder to retract. At this time, the stroke of the lifting cylinder is the distance between the upper and lower pairs of sensors; similarly, when the two pairs of sensors in the middle are working, the other pair of sensors is closed, and the stroke is the distance between the middle pair of sensors. In this way, by controlling the corresponding sensors to work through the PLC program, the stroke of the lifting cylinder can be realized, thereby achieving the purpose of changing the stroke.

[0008] As a further solution of the present invention: an induction sheet is fixedly connected to one side of the sensor on the side wall of the slide rail, the sensor is fixed to the back plate by a buckle, and one side of the sensor is connected to a PLC controller by a wire; a two-position five-way electromagnetic reversing valve is connected to the PLC controller, and a throttle valve is provided on the two-position five-way electromagnetic reversing valve. When the induction sheet reaches the sensor position, an induction signal is generated, and the induction signal is transmitted to the PLC controller, and the PLC controller controls the reversal of the two-position five-way electromagnetic reversing valve. The long vertical slot of the sensor is fixed on the back plate, and each of the sensors has its own threaded rod. First, a nut is screwed onto the threaded rod of the sensor, and then the threaded rod is passed through the long vertical slot, and then another nut is screwed onto the threaded rod. The two nuts can fix the sensor on the long vertical slot, and the position on the long vertical slot can be adjusted at will. The adjusted position is the stroke of the slide rail, and multiple pairs of sensors can be set on the long vertical slot, and the number of pairs set is the variable number of the stroke.

[0009] As a further solution of the present invention: the slide rail is evenly fixed with connecting rods from top to bottom, there are five connecting rods, height valves are fixedly connected to the back plate on both sides of the connecting rods, and a rotating mechanism is connected between the height valve and the connecting rods; when the slide rail moves up and down, the rotation of the telescopic rotating plate can be ensured, and multiple test stations are provided in a limited space, multiple height valves can be tested at the same time, and more test schemes can be verified at the same time.

[0010] As a further solution of the present invention: a pin shaft is arranged between the rotating mechanism, the height valve and the connecting rod, the rotating mechanism and the height valve are rotatably connected via the pin shaft, a slide groove is provided on the connecting plate at the pin shaft, the rotating mechanism and the connecting rod are rotatably and slidingly connected via the pin shaft and the slide groove; during the fatigue test, the height valve can be driven by the rotating mechanism to change its angle, so that the test is closer to the actual working state.

[0011] As a further solution of the present invention: the height valve is connected with a connecting pipeline for exhaust and air intake, and the connecting pipeline is connected to the height valve through a threaded seal.

[0012] As a further solution of the present invention: a dynamic testing device is fixedly connected to one end of the height valve on the back plate, and the dynamic testing device includes a threaded seat, an adjusting screw arranged inside the threaded seat, a rotating slider fixedly connected to one end of the adjusting screw, a tightening sleeve arranged on the periphery of the rotating slider, and a compression spring arranged on the rotating slider and the bottom end of the tightening sleeve; the dynamic testing device can be used to apply a common reverse force to the action process of the height valve, thereby performing a pressure test on the action of the height valve.

[0013] As a further solution of the present invention: the compression spring is connected to the tightening sleeve and the rotating slider by a clamping manner, the adjusting screw is connected to the threaded seat by a thread, and the rotating slider is slidably connected to the tightening sleeve; the distance between the power testing device and the height valve can be adjusted by rotating the adjusting screw, thereby facilitating the adjustment of the reverse force of the height valve.

[0014] As a further solution of the present invention: the rotating mechanism is a telescopic rotating plate or a rotating rod.

[0015] As a further solution of the present invention: the telescopic rotating plate includes a fixed support plate, a telescopic support plate arranged inside the fixed support plate and a connecting screw arranged on a side wall of the fixed support plate, the fixed support plate is slidably connected to the telescopic support plate, and the fixed support plate is connected to the connecting screw by a thread; the length of the telescopic rotating plate can be adjusted by sliding the telescopic support plate, thereby facilitating the control of the rotation angle of the telescopic rotating plate according to needs, avoiding the interference of the sliding groove on the connecting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The test equipment of the present invention can greatly increase the test action frequency, and can complete about 200,000 tests per day, which greatly shortens the test cycle, and can better simulate the actual bumpy working state of the altitude valve, so that the fatigue test data is closer to the actual working state;

[0018] 2. During the fatigue test, the present invention can realize the variable angle movement of the height valve driven by the rotating mechanism, making the test closer to the actual working state;

[0019] 3. The present invention sets four sensors in cooperation with the induction sheet to control the stroke of the lifting cylinder. The corresponding sensors can be controlled by the PLC program to adjust the stroke of the lifting cylinder and achieve the purpose of changing the stroke.

[0020] 4. The present invention can adjust the distance between the power test device and the height valve by rotating the adjusting screw, thereby facilitating the adjustment of the reverse force of the height valve. The power test device applies a certain reverse force to the action process of the height valve, thereby performing a pressure test on the action of the height valve, and the test range is wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 For the present invention Figure 1 A local enlarged schematic diagram of the middle A;

[0023] Figure 3 For the present invention Figure 1 Schematic diagram of the connection relationship between the medium height valve, the rotating mechanism, the connecting rod, the pin shaft and the slide rail;

[0024] Figure 4 A control system diagram of an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the top view of the structure of the power test device in an embodiment of the present invention;

[0026] Figure 6 It is a schematic front cross-sectional view of the telescopic rotating plate in an embodiment of the present invention.

[0027] In the figure: 1. vibration table; 2. base; 3. back plate; 4. height valve; 41. rotating rod; 5. connecting pipe; 6. connecting rod; 7. pin shaft; 8. connecting plate; 9. slide rail; 10. slider; 11. PLC controller; 12. sensor; 13. lifting cylinder; 14. power testing device; 1401. threaded seat; 1402. adjusting screw; 1403. rotating slider; 1404. tightening sleeve; 1405. compression spring; 1501. telescopic support plate; 1502. fixed support plate; 1503. connecting screw. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figures 1 to 4 In an embodiment of the present invention, a high-valve fatigue test device with a wide test range includes a vibration table 1 and an action mechanism, wherein the action mechanism includes a base 2 arranged above the vibration table 1, a back plate 3 is fixedly connected to the middle of the upper part of the base 2, a reinforcing rib is welded between the bottom of the back plate 3 and the base 2, sliders 10 are vertically distributed in the middle of both side walls above the back plate 3, the sliders 10 are connected to the back plate 3 by bolts, there are four sliders 10 in total, and slide rails 9 are slidably connected to the sliders 10 on both sides, and a connecting plate 8 is fixedly connected above the slide rail 9, and the connecting plate 8 and the two slide rails 9 form an inverted U-shaped structure.

[0031] Among them, a lifting cylinder 13 is fixedly connected to the bottom of the slide rail 9 on one side, and the lifting cylinder 13 is connected to the base 2 by screws; the lifting cylinder 13 provides power for the lifting movement of the slide rail 9, and a sensor 12 is arranged on one side of the bottom end of the slide rail 9 above the back plate 3. There are four sensors 12, and the two middle sensors 12 are a pair, and the upper and lower two sensors 12 are another pair; four sensors 12 are selected and paired in pairs to enable the lifting cylinder 13 to change its stroke, and the sensor 12 is controlled to work by the PLC controller 11, and the two-position five-way electromagnetic reversing valve controls the extension and contraction of the lifting cylinder 13. The throttle valve is installed on the exhaust port of the electromagnetic reversing valve, and the exhaust speed can be adjusted by manually adjusting the opening of the throttle valve, thereby adjusting the extension and contraction speed of the lifting cylinder 13 and adjusting the experimental speed; when the top and bottom pairs of sensors 12 are working, the middle pair of sensors 12 is closed, and when the induction sheet senses the sensor 12 at the bottom, the sensing signal The signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the two-position five-way electromagnetic reversing valve to control the extension of the lifting cylinder 13. When the induction plate senses the uppermost sensor 12, the induction signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the two-position five-way electromagnetic reversing valve and the throttle valve to control the retraction of the lifting cylinder 13. At this time, the stroke of the lifting cylinder 13 is the distance between the upper and lower pairs of sensors 12; similarly, when the two pairs of sensors 12 in the middle are working, the other pair of sensors 12 is closed. At this time, the stroke is the distance between the middle pair of sensors 12. In this way, by controlling the corresponding sensor 12 to work through the PLC program, the stroke of the lifting cylinder 13 can be controlled to achieve the purpose of changing the stroke, thereby realizing the angle change of the height valve test. According to the needs of different tests, the logarithm of the sensor 12 and the distance between the sensors 12 can be changed to meet the tests of different strokes and angles of the height valve.

[0032] A sensing sheet is fixedly connected to one side of the sensor 12 on the side wall of the slide rail 9. The sensor 12 is fixed to the back plate 3 by a buckle. One side of the sensor 12 is connected to the PLC controller 11 by a wire. When the sensing sheet reaches the position of the sensor 12, a sensing signal is generated, and the sensing signal is transmitted to the PLC controller 11. The long vertical slot of the sensor 12 is fixed on the back plate 3. Each sensor 12 has its own threaded rod. First, a nut is screwed onto the threaded rod of the sensor 12, and then the threaded rod is passed through the long vertical slot, and then another nut is screwed onto the threaded rod. The two nuts can fix the sensor 12 in the long vertical slot. The position can be adjusted at will on the long vertical groove, and the adjusted position is the stroke of the slide rail 9. Multiple pairs of sensors 12 can be set on the long vertical groove, and the number of pairs set is the variable number of the stroke. The slide rail 9 is evenly fixed with connecting rods 6 from top to bottom, and there are five connecting rods 6. The back plate 3 is fixedly connected with height valves 4 on both sides of the connecting rods 6, and a rotating rod 41 is connected between the height valve 4 and the connecting rod 6; when the slide rail 9 moves up and down, it can be ensured that the rotating rod 41 rotates, and multiple test stations are provided in a limited space, and multiple height valves 4 can be tested at the same time, and more test schemes can be verified at the same time.

[0033] A pin shaft 7 is arranged between the rotating rod 41, the height valve 4 and the connecting rod 6. The rotating rod 41 and the height valve 4 are rotatably connected through the pin shaft 7. A sliding groove is provided on the connecting plate 8 at the pin shaft 7. The rotating rod 41 and the connecting rod 6 are rotatably and slidingly connected through the pin shaft 7 and the sliding groove. During the fatigue test, the height valve 4 can change its angle under the drive of the rotating rod 41, so that the test is closer to the actual working state. The height valve 4 is connected with a connecting pipe 5, and the connecting pipe 5 is connected to the height valve 4 through a threaded seal.

[0034] The working principle of the present invention is: during the fatigue test, the vibration table 1 is first started to control the vibration of the equipment, and the lifting cylinder 13 pushes the slide rail 9 to move up and down, and then the rotating rod 41 is driven to rotate under the pull of the connecting rod 6, thereby realizing the angle-changing action between the rotating rod 41 and the height valve 4, so that the test is closer to the actual working state. When the induction sheet reaches the position of the sensor 12, an induction signal will be generated, and the induction signal will be transmitted to the PLC controller 11. The PLC controller 11 controls the reversal of the lifting cylinder 13 to perform an angle-changing experiment on the height valve 4. The long vertical slot of the sensor 12 is fixed on the back plate 3. Each sensor 12 has its own threaded rod. First, a nut is screwed onto the threaded rod of the sensor 12, and then the threaded rod is passed through the long vertical slot, and then another nut is screwed onto the threaded rod. The two nuts can fix the sensor 12 on the long vertical slot, and the position on the long vertical slot can be adjusted at will. The adjusted position is the stroke of the slide rail 9. Multiple pairs of sensors 12 can be set on the long vertical slot, and the number of pairs set is The variable number of strokes, four sensors 12 are selected and paired in pairs so that the lifting cylinder 13 can change the stroke extension and extension, and the sensors 12 are controlled by the PLC controller 11; when the top and bottom pairs are working, the middle pair of sensors 12 is closed, and when the sensing plate touches the bottom sensor 12, the sensing signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the height valve 4 to change direction, and the lifting cylinder 13 extends out, and when the sensing plate touches the top sensor 12, the sensing signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the height valve 4 to change direction, and the lifting cylinder 13 retracts. At this time, the stroke of the lifting cylinder 13 is the distance between the upper and lower pairs of sensors; similarly, when the middle two pairs of sensors 12 are working, the other pair of sensors 12 is closed, and the stroke is the distance between the middle pair of sensors 12. In this way, by controlling the corresponding sensors 12 to work through the PLC program, the stroke change of the lifting cylinder 13 can be realized, and the purpose of the variable angle test height valve is achieved.

[0035] Embodiment 2:

[0036] See also Figures 1 to 6 In an embodiment of the present invention, a high-valve fatigue test device with a wide test range includes a vibration table 1 and an action mechanism, wherein the action mechanism includes a base 2 arranged above the vibration table 1, a back plate 3 is fixedly connected to the middle of the upper part of the base 2, a reinforcing rib is welded between the bottom of the back plate 3 and the base 2, sliders 10 are vertically distributed in the middle of both side walls above the back plate 3, the sliders 10 are connected to the back plate 3 by bolts, there are four sliders 10 in total, and slide rails 9 are slidably connected to the sliders 10 on both sides, and a connecting plate 8 is fixedly connected above the slide rail 9, and the connecting plate 8 and the two slide rails 9 form an inverted U-shaped structure.

[0037] Among them, a lifting cylinder 13 is fixedly connected to the bottom of the slide rail 9 on one side, and the lifting cylinder 13 is connected to the base 2 by screws; the lifting cylinder 13 provides power for the lifting movement of the slide rail 9, and a sensor 12 is arranged on one side of the bottom end of the slide rail 9 above the back plate 3. There are four sensors 12, and the two middle sensors 12 are a pair, and the upper and lower two sensors 12 are another pair; four sensors 12 are selected and paired in pairs to enable the lifting cylinder 13 to change its stroke, and the sensor 12 is controlled to work by the PLC controller 11, and the two-position five-way electromagnetic reversing valve controls the extension and contraction of the lifting cylinder 13. The throttle valve is installed on the exhaust port of the electromagnetic reversing valve, and the exhaust speed can be adjusted by manually adjusting the opening of the throttle valve, thereby adjusting the extension and contraction speed of the lifting cylinder 13 and adjusting the experimental speed; when the top and bottom pairs of sensors 12 are working, the middle pair of sensors 12 is closed, and when the induction sheet senses the sensor 12 at the bottom, the sensing signal The signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the two-position five-way electromagnetic reversing valve to control the extension of the lifting cylinder 13. When the induction plate senses the uppermost sensor 12, the induction signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the two-position five-way electromagnetic reversing valve and the throttle valve to control the retraction of the lifting cylinder 13. At this time, the stroke of the lifting cylinder 13 is the distance between the upper and lower pairs of sensors 12; similarly, when the two pairs of sensors 12 in the middle are working, the other pair of sensors 12 is closed. At this time, the stroke is the distance between the middle pair of sensors 12. In this way, by controlling the corresponding sensor 12 to work through the PLC program, the stroke of the lifting cylinder 13 can be controlled to achieve the purpose of changing the stroke, thereby realizing the angle change of the height valve test. According to the needs of different tests, the logarithm of the sensor 12 and the distance between the sensors 12 can be changed to meet the tests of different strokes and angles of the height valve.

[0038] A sensing sheet is fixedly connected to one side of the sensor 12 on the side wall of the slide rail 9. The sensor 12 is fixed to the back plate 3 by a buckle. One side of the sensor 12 is connected to the PLC controller 11 by a wire. When the sensing sheet reaches the position of the sensor 12, a sensing signal is generated, and the sensing signal is transmitted to the PLC controller 11. The PLC controller 11 controls the reversal of the lifting cylinder 13. The long vertical slot of the sensor 12 is fixed on the back plate 3. Each sensor 12 has its own threaded rod. First, a nut is screwed onto the threaded rod of the sensor 12, and then the threaded rod is passed through the long vertical slot, and then another nut is screwed onto the threaded rod. The two nuts can tighten the sensor 12. The sensor 12 is fixed on the long vertical slot, and its position can be adjusted at will on the long vertical slot. The adjusted position is the stroke of the slide rail 9. Multiple pairs of sensors 12 can be set on the long vertical slot, and the number of pairs set is the variable number of the stroke. The slide rail 9 is evenly fixed with connecting rods 6 from top to bottom. There are five connecting rods 6. Height valves 4 are fixedly connected to both sides of the connecting rods 6 on the back plate 3, and a telescopic rotating plate is connected between the height valve 4 and the connecting rod 6. When the slide rail 9 moves up and down, the rotation of the telescopic rotating plate can be ensured. Multiple test stations are provided in a limited space, and multiple height valves 4 can be tested at the same time, and more test schemes can be verified at the same time.

[0039] A pin shaft 7 is arranged between the telescopic rotating plate, the height valve 4 and the connecting rod 6. The telescopic rotating plate and the height valve 4 are rotatably connected through the pin shaft 7. A sliding groove is provided on the connecting plate 8 at the pin shaft 7. The telescopic rotating plate and the connecting rod 6 are rotatably and slidingly connected through the pin shaft 7 and the sliding groove. During the fatigue test, the height valve 4 can change its angle under the drive of the telescopic rotating plate, so that the test is closer to the actual working state. The height valve 4 is connected with a connecting pipe 5, and the connecting pipe 5 is connected to the height valve 4 through a threaded seal.

[0040] A power test device 14 is fixedly connected to one end of the height valve 4 on the back plate 3, and the power test device 14 includes a threaded seat 1401, an adjusting screw 1402 arranged inside the threaded seat 1401, a rotating slider 1403 fixedly connected to one end of the adjusting screw 1402, a top tightening sleeve 1404 arranged on the periphery of the rotating slider 1403, and a compression spring 1405 arranged at the bottom end of the rotating slider 1403 and the top tightening sleeve 1404; the power test device 14 can be used to apply a total reverse force to the action process of the height valve 4, thereby pressurizing the action of the height valve 4 Test, the compression spring 1405 and the tightening sleeve 1404 and the rotating slider 1403 are connected by clamping, the adjusting screw 1402 is connected to the threaded seat 1401 by threads, and the rotating slider 1403 is slidingly connected to the tightening sleeve 1404; the distance between the power test device 14 and the height valve 4 can be adjusted by rotating the adjusting screw 1402, so as to facilitate the adjustment of the reverse force of the height valve 4, and the power test device 14 applies pressure to the height valve fixed on the back plate to test the fatigue test of the height valve under the working condition of external pressure, and the test working condition range is wider.

[0041] The telescopic rotating plate includes a fixed support plate 1502, a telescopic support plate 1501 arranged inside the fixed support plate 1502, and a connecting screw 1503 arranged on a side wall of the fixed support plate 1502. The fixed support plate 1502 is slidably connected to the telescopic support plate 1501, and the fixed support plate 1502 and the connecting screw 1503 are connected by threads; the length of the telescopic rotating plate can be adjusted by sliding the telescopic support plate 1501, so as to facilitate the control of the rotation angle of the telescopic rotating plate according to needs, and avoid the interference of the sliding groove on the connecting rod 6.

[0042] The working principle of the present invention is: during the fatigue test, the vibration table 1 is started, and the lifting cylinder 13 pushes the slide rail 9 to move up and down, and then the telescopic rotating plate is driven to rotate under the pull of the connecting rod 6, and then the height valve 4 is pulled to rotate, so that the height valve 4 can change the angle under the drive of the telescopic rotating plate, so that the test is closer to the actual working state. When the induction sheet reaches the position of the sensor 12, a sensing signal will be generated, and the sensing signal will be transmitted to the PLC controller 11. The long vertical slot of the sensor 12 is fixed on the back plate 3. Each sensor 12 has its own threaded rod. First, a nut is screwed onto the threaded rod of the sensor 12, and then the threaded rod is passed through the long vertical slot. Then use another nut to screw onto the threaded rod, and the two nuts can fix the sensor 12 on the long vertical slot. The position on the long vertical slot can be adjusted at will. The adjusted position is the stroke of the slide rail 9. Multiple pairs of sensors 12 can be set on the long vertical slot. The number of pairs set is the variable number of the stroke. Selecting four sensors 12 and pairing them in pairs can make the lifting cylinder 13 able to change the stroke extension and contraction, and the PLC controller 11 controls the operation of the sensors 12; when the top and bottom pairs are working, the middle pair of sensors 12 is closed, and when the induction sheet touches the bottom sensor 12, the induction signal is transmitted to the PLC controller 11, and the PLC controller 11 controls the height The valve 4 is reversed, and the lifting cylinder 13 extends. When the induction plate touches the uppermost sensor 12, the induction signal is transmitted to the PLC controller 11, causing the lifting cylinder 13 to retract. At this time, the stroke of the lifting cylinder 13 is the distance between the upper and lower pairs of sensors; similarly, when the two pairs of sensors 12 in the middle are working, the other pair of sensors 12 is closed. At this time, the stroke is the distance between the middle pair of sensors 12. In this way, the stroke of the lifting cylinder 13 can be realized by controlling the corresponding sensors 12 to work through the PLC program, so as to achieve the purpose of changing the stroke. The distance between the power test device 14 and the height valve can be adjusted by turning the adjusting screw. It is convenient to adjust the reverse force of the height valve. The power test device 14 applies a total reverse force to the action process of the height valve, and then the action of the height valve can be pressure tested. The test range is wider. The distance between the power test device 14 and the height valve 4 can be adjusted by rotating the adjusting screw 1402, so as to facilitate the adjustment of the reverse force of the height valve 4. The power test device 14 applies a total reverse force to the action process of the height valve 4, and then the height valve 4 can be tested under pressure to simulate the working state of the height valve under actual pressure conditions, so as to make the test range wider.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-valve fatigue test equipment with a wide range of tests, including a vibration table and an action mechanism, characterized in that: The action mechanism includes a base arranged above the vibration table, a back plate is fixedly connected to the middle part of the upper part of the base, a reinforcing rib is welded between the bottom of the back plate and the base, sliders are vertically distributed in the middle part of the two side walls above the back plate, the sliders are connected to the back plate by bolts, there are four sliders in total, the sliders on both sides are slidably connected to the slide rails, a connecting plate is fixedly connected above the slide rails, and the connecting plate and the two slide rails form an inverted U-shaped structure; A lifting cylinder is fixedly connected to the bottom of the slide rail on one side, and the lifting cylinder is connected to the base by screws; a sensor is arranged on one side of the bottom end of the slide rail above the back plate, and there are four sensors, and the two middle sensors form a pair, and the upper and lower sensors form another pair; A sensing sheet is fixedly connected to the side wall of the slide rail at one side of the sensor, the sensor is fixed to the back plate by a buckle, one side of the sensor is connected to a PLC controller by a wire, the PLC controller is connected to a two-position five-way electromagnetic reversing valve, and a throttle valve is provided on the two-position five-way electromagnetic reversing valve; When the upper and lower sensors are working, the two middle sensors are closed. When the sensing plate touches the lowermost sensor, the sensing signal is transmitted to the PLC controller. The PLC controller controls the reversal of the height valve and the lifting cylinder extends. When the sensing plate touches the uppermost sensor, the sensing signal is transmitted to the PLC controller. The PLC controller controls the reversal of the height valve and the lifting cylinder retracts. At this time, the stroke of the lifting cylinder is the distance between the upper and lower sensors. When the two middle sensors are working, the upper and lower sensors are closed. At this time, the stroke of the lifting cylinder is the distance between the two middle sensors. The corresponding sensors are controlled by the PLC program to realize the change of the stroke of the lifting cylinder and the variable angle test of the height valve.

2. A high-valve fatigue test equipment with a wide test range according to claim 1, characterized in that: The slide rails are evenly fixed with connecting rods from top to bottom, and height valves are fixedly connected to the back plate at both sides of the connecting rods, and a rotating mechanism is connected between the height valve and the connecting rods.

3. The high-valve fatigue test equipment with a wide test range according to claim 2, characterized in that: A pin shaft is provided between the rotating mechanism, the height valve and the connecting rod, the rotating mechanism and the height valve are rotationally connected via the pin shaft, a sliding groove is provided on the connecting plate at the pin shaft, and the rotating mechanism and the connecting rod are rotationally and slidingly connected via the pin shaft and the sliding groove.

4. The high-valve fatigue test equipment with a wide test range according to claim 3, characterized in that: The height valve is connected with a connecting pipeline for exhaust and intake, and the connecting pipeline is connected to the height valve through a threaded seal.

5. The high-valve fatigue test equipment with a wide test range according to claim 2, characterized in that: A dynamic testing device is fixedly connected to one end of the height valve on the back plate, and the dynamic testing device includes a threaded seat, an adjusting screw arranged inside the threaded seat, a rotating slider fixedly connected to one end of the adjusting screw, a tightening sleeve arranged on the periphery of the rotating slider, and a compression spring arranged on the rotating slider and the bottom end of the tightening sleeve.

6. The high-valve fatigue test equipment with a wide test range according to claim 5, characterized in that: The compression spring is connected to the tightening sleeve and the rotating slide block by clamping, the adjusting screw is connected to the threaded seat by threads, and the rotating slide block is slidably connected to the tightening sleeve.

7. The high-valve fatigue test equipment with a wide test range according to claim 2, characterized in that: The rotating mechanism is a telescopic rotating plate or a rotating rod.

8. The high-valve fatigue test equipment with a wide test range according to claim 7, characterized in that: The telescopic rotating plate includes a fixed support plate, a telescopic support plate arranged inside the fixed support plate and a connecting screw arranged on a side wall of the fixed support plate. The fixed support plate is slidably connected to the telescopic support plate, and the fixed support plate is connected to the connecting screw by threads.

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