CN215262362U - Pressure alternation testing machine - Google Patents
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- CN215262362U CN215262362U CN202120911231.3U CN202120911231U CN215262362U CN 215262362 U CN215262362 U CN 215262362U CN 202120911231 U CN202120911231 U CN 202120911231U CN 215262362 U CN215262362 U CN 215262362U
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- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 230000006837 decompression Effects 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000003921 oil Substances 0.000 description 35
- 239000007788 liquid Substances 0.000 description 18
- 238000001816 cooling Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model relates to the field of railway equipment testing, and provides a pressure alternation tester, which comprises an environment box, a medium input device and an alternating pressure source device; the medium input device comprises a medium groove, a medium pump and a first one-way valve; the alternating pressure source equipment comprises an oil tank, an oil pump, a first servo valve, a second servo valve, a third servo valve, a decompression cylinder, a first boosting cylinder, a second boosting cylinder and an output pipeline, wherein the output ends of the decompression cylinder, the first boosting cylinder and the second boosting cylinder are coupled with the output pipeline; the output end of the first one-way valve is connected with the output pipeline, the tail end of the output pipeline is connected with a tested workpiece contained in the environment box, and the rated output pressure of the first pressure cylinder is smaller than the rated output pressure of the second pressure cylinder. The pressure reducing cylinder, the first pressure increasing cylinder and the second pressure increasing cylinder are matched with the servo valve to work to achieve different testing requirements, and equipment cost is saved.
Description
Technical Field
The utility model relates to a railway equipment test field particularly, relates to a pressure alternation testing machine.
Background
In recent years, with the rapid development of high-speed rail industry in China, new models of motor train unit traction systems are continuously emerging, and the products of novel traction transformer cooling units and traction converter cooling units are rapidly increased, on one hand, because foreign suppliers start to locally produce at home, and on the other hand, because domestic enterprises accelerate new product development. The semi-finished radiator of the cooling unit and the accessory parts thereof, such as a water-cooling substrate, a ferrule type pipe joint, a high-pressure oil pipe, a pressure sensor, a pressure gauge and the like, need to perform a pressure alternation test according to the product standard requirements, so that the use requirement of the pressure alternation tester is greatly increased. In the prior art, a pressure alternating tester is often used for testing a certain device and a certain performance independently, and various types of pressure alternating testers need to be prepared according to various testing requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pressure alternation tester, which comprises an environment box, a medium input device and an alternating pressure source device, for solving the problems of single function and low reuse rate of the pressure alternation tester in the prior art; the environment box is used for accommodating a workpiece to be tested and setting a test temperature; the medium input device comprises a medium groove, a medium pump coupled with the medium groove and a first one-way valve coupled with the output end of the medium pump; the alternating pressure source equipment comprises an oil tank, an oil pump connected with the oil tank, a first servo valve, a second servo valve and a third servo valve connected with the oil pump, a decompression cylinder connected with the output end of the first servo valve, a first boosting cylinder connected with the output end of the second servo valve, a second boosting cylinder connected with the output end of the third servo valve and an output pipeline, wherein the output ends of the decompression cylinder, the first boosting cylinder and the second boosting cylinder are coupled with the output pipeline; the output end of the first one-way valve is connected with the output pipeline, the tail end of the output pipeline is connected with a tested workpiece contained in the environment box, and the rated output pressure of the first pressure cylinder is smaller than the rated output pressure of the second pressure cylinder.
Further, the alternating pressure source equipment further comprises a first pneumatic control valve, a first electromagnetic valve, a second pneumatic control valve, a second electromagnetic valve, a third pneumatic control valve and a third electromagnetic valve, wherein the input end of the first pneumatic control valve is connected with the output end of the decompression cylinder, the output end of the first pneumatic control valve is connected with the output pipeline, the output end of the first electromagnetic valve is connected with the control end of the first pneumatic control valve, and the input end of the first electromagnetic valve is connected with a compressed air source; the input end of the second pneumatic control valve is connected with the output end of the first booster cylinder, the output end of the second pneumatic control valve is connected with the output pipeline, the output end of the second electromagnetic valve is connected with the control end of the second pneumatic control valve, and the input end of the second electromagnetic valve is connected with a compressed air source; the input end of the third pneumatic control valve is connected with the output end of the second pressure cylinder, the output end of the third pneumatic control valve is connected with the output pipeline, the output end of the third electromagnetic valve is connected with the control end of the third pneumatic control valve, and the input end of the third electromagnetic valve is connected with a compressed air source.
Further, in the alternating pressure source device, a pressure reducing valve is arranged on a pipeline between the oil pump and the input end of the first servo valve.
Further, the alternating pressure source device further comprises a cold oil machine connected with the oil tank.
Further, the medium input device further comprises a cooler, the output end of the medium pump is connected with the cooler, and the input end of the first one-way valve is connected with the cooler.
Further, the medium input device further comprises a fourth electromagnetic valve, a fourth pneumatic control valve and a manual pressure relief valve, wherein the input end of the fourth pneumatic control valve is connected with the output pipeline, the output end of the fourth pneumatic control valve is connected with the medium groove, the output end of the fourth electromagnetic valve is connected with the control end of the fourth pneumatic control valve, and the input end of the fourth electromagnetic valve is connected with a compressed air source; the input end of the manual pressure relief valve is connected with the output pipeline, and the output end of the manual pressure relief valve is connected with the medium groove.
Further, the pressure alternating tester also comprises an alternating air pressure source device, and the alternating air pressure source device is used for inputting alternating air pressure gas to the workpiece to be tested; the alternating air pressure source equipment comprises an air storage pump connected with a compressed air source, a first electric proportional valve connected with the air storage pump, and a fifth electromagnetic valve connected with the output end of the first electric proportional valve, the output end of the fifth electromagnetic valve is connected with an alternating air source output pipeline, and the tail end of the alternating air source output pipeline is connected with the workpiece to be detected.
Further, the alternating air pressure source equipment further comprises a vacuum pump, a vacuum tank connected with the vacuum pump, and a second electric proportional valve connected with the vacuum tank, wherein the output end of the second electric proportional valve is connected with a fifth electromagnetic valve, the output end of the first electric proportional valve is connected with the first input end of the fifth electromagnetic valve, the output end of the second electric proportional valve is connected with the second input end of the fifth electromagnetic valve, and the fifth electromagnetic valve is used for communicating the output end of the second electric proportional valve or the output end of the first electric proportional valve with the alternating air source output pipeline.
Furthermore, the alternating air pressure source equipment further comprises a digital display meter and a pressure sensor, the pressure sensor is connected with the alternating air source output pipeline, and the digital display meter is electrically connected with the pressure sensor.
Further, the medium tank contains water or oil therein.
The pressure alternation tester in the utility model realizes different testing requirements by arranging the decompression cylinder, the first pressure cylinder and the second pressure cylinder to work together with the servo valve, adopts the medium input device to fill the tested workpiece with the medium liquid conveniently, is convenient and quick to operate, and simultaneously fills the output pipeline, the decompression cylinder, the first pressure cylinder and the second pressure cylinder with the medium liquid by the medium input device; and then different electric signals are conducted to the servo valve, so that the decompression cylinder, the first pressure cylinder and the second pressure cylinder output different pressures, and meanwhile, the first one-way valve blocks pressure liquid from flowing into the medium pump, so that the medium pump is protected.
Drawings
The features and advantages of the invention will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be understood as imposing any limitation on the invention, in which:
fig. 1 is a schematic hydraulic schematic diagram of a pressure alternating tester according to some embodiments of the present invention;
fig. 2 is a schematic structural layout diagram of the pressure alternation tester in some embodiments of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The pressure alternation test is an important test item in a cooling unit type test of the motor train unit and is important for ensuring the safe and reliable operation of a traction system of the motor train unit.
The railway locomotive power device often needs to be provided with a radiator, the performance of the radiator influences the service life of the power device, in order to increase the effect of the radiator, a fluid pipeline is often arranged in the radiator, and the efficiency of heat exchange is improved. Meanwhile, aiming at the ferrule type pipe joint on the railway locomotive, in order to ensure reliable use and reach the use times, the ferrule type pipe joint needs to be subjected to alternating pressure test.
The auxiliary parts of the cooling unit semi-finished radiator, such as a water-cooling substrate, a pressure gauge and the like, also need to be subjected to a pressure alternation test according to the product standard requirements, so that the use requirement of the pressure alternation testing machine is greatly increased. In the prior art, test equipment is often designed for a certain tested workpiece independently, the reuse rate is low, multiple sets of equipment need to be set for multiple tested workpieces, and for complex tests, equipment needs to be switched for testing, so that the operation is complex.
As shown in fig. 1 and fig. 2, the embodiment of the present invention provides a pressure alternating tester 1000 capable of implementing a composite test, which includes an environmental chamber 100, a medium input device 200, and an alternating pressure source device 300; the environment box 100 is used for accommodating the workpiece 500 to be tested and setting a test temperature, the environment box 100 can be a sealed box body, and a corresponding heating device and a corresponding cooling device can be arranged to control the temperature of the environment inside the environment box 100; the medium input device 200 includes a medium tank 210, a medium pump 220 coupled to the medium tank 210, and a first check valve 230 coupled to an output terminal of the medium pump 220; the alternating pressure source apparatus 300 includes an oil tank 301, an oil pump 302 connected to the oil tank 301, a first servo valve 303, a second servo valve 304, and a third servo valve 305 connected to the oil pump 302, a pressure reducing cylinder 306 connected to an output end of the first servo valve 303, a first pressure increasing cylinder 307 connected to an output end of the second servo valve 304, a second pressure increasing cylinder 309 connected to an output end of the third servo valve 305, and an output pipe 310, output ends of the pressure reducing cylinder 306, the first pressure increasing cylinder 307, and the second pressure increasing cylinder 309 being coupled to the output pipe 310; the output end of the first check valve 230 is connected with the output pipeline 310, the tail end of the output pipeline 310 is connected with the workpiece 500 to be tested which is accommodated in the environment box 100, and the rated output pressure of the first pressurizing cylinder 307 is smaller than the rated output pressure of the second pressurizing cylinder 309.
By inputting different voltage signals to the first servo valve 303, the second servo valve 304, and the third servo valve 305, the pressure reducing cylinder 306, the first pressure increasing cylinder 307, and the second pressure increasing cylinder 309 are controlled to output different pressures corresponding to the first servo valve 303, the second servo valve 304, and the third servo valve 305, thereby realizing alternating pressure output, and the pressure reducing cylinder 306, the first pressure increasing cylinder 307, and the second pressure increasing cylinder 309 can be operated individually or in combination. The embodiment of the utility model provides a pressure alternation tester 1000, during the experiment, a port of measured work piece 500 with output pipeline 310 connects, medium pump 220 among medium input device 200 draws medium liquid from medium groove 210 and injects into in output pipeline 310, thereby is full of measured work piece 500 and output pipeline 310, only medium liquid in order to guarantee output pipeline 310, decompression cylinder 306, first pressure cylinder 307, second pressure cylinder 309 can carry out the liquid extraction at medium input device 200 during operation for medium liquid is full of decompression cylinder 306, first pressure cylinder 307, second pressure cylinder 309, works as after decompression cylinder 306, first pressure cylinder 307, second pressure cylinder 309, measured work piece 500 are full of medium liquid, can right other ports of measured work piece seal, close medium pump 220, then right first servo valve 303, Second servo valve 304 and third servo valve 305 input different voltage signals so that output line 310 outputs different pressures. The first check valve 230 blocks the liquid flowing to the medium pump 220 to prevent pressure release.
In order to isolate the mutual influence of the output pressures of the decompression cylinder 306, the first pressurization cylinder 307 and the second pressurization cylinder 309, the alternating pressure source device 300 further includes a first pneumatic control valve 311, a first electromagnetic valve 312, a second pneumatic control valve 313, a second electromagnetic valve 314, a third pneumatic control valve 315 and a third electromagnetic valve 316, an input end of the first pneumatic control valve 311 is connected with an output end of the decompression cylinder 306, an output end of the first pneumatic control valve 311 is connected with the output pipeline 310, an output end of the first electromagnetic valve 312 is connected with a control end of the first pneumatic control valve 311, and an input end of the first electromagnetic valve 312 is connected with a compressed air source; the input end of the second pneumatic control valve 313 is connected with the output end of the first pressure cylinder 307, the output end of the second pneumatic control valve 313 is connected with the output pipeline 310, the output end of the second electromagnetic valve 314 is connected with the control end of the second pneumatic control valve 313, and the input end of the second electromagnetic valve 314 is connected with a compressed air source; the input end of the third pneumatic control valve 315 is connected with the output end of the second pressure cylinder 209, the output end of the third pneumatic control valve 315 is connected with the output pipeline 310, the output end of the third electromagnetic valve 316 is connected with the control end of the third pneumatic control valve 315, and the input end of the third electromagnetic valve 316 is connected with a compressed air source. The first, second, and third solenoid valves 312, 314, 316 may be normally closed solenoid valves. By energizing the first solenoid valve 312, the second solenoid valve 314, and the third solenoid valve 316, the gas in the compressed gas source reaches the control ends of the corresponding first pneumatic valve 311, the second pneumatic valve 313, and the third pneumatic valve 315, and the pressures output by the decompression cylinder 306, the first pressure cylinder 307, and the second pressure cylinder 309 are transmitted to the output pipeline 310. The first pneumatic control valve 311, the second pneumatic control valve 313 and the third pneumatic control valve 315 can be opened individually according to the requirement of the test in each test, or can be opened in a single test according to the requirement of the test, so that complex test conditions are realized.
In order to reduce the pressure output from the pressure reducing cylinder 306, a pressure reducing valve 317 is provided in the line between the oil pump 302 and the input end of the first servo valve 303 in the alternating pressure source apparatus 300.
The return lines of the first 303, second 304 and third 305 servo valves are connected to the tank 301.
In order to cool the hydraulic oil in the oil tank 301, the alternating pressure source device 300 further includes a cold oil machine 318 connected to the oil tank 301.
In order to reduce the temperature of the medium liquid initially flowing into the workpiece 500 to avoid scalding of workers, the medium input device 200 further includes a cooler 240, an output end of the medium pump 220 is connected to the cooler 240, an input end of the first check valve 230 is connected to the cooler 240, and the medium liquid is output from the medium pump 220, passes through the cooler 240, and flows to the first check valve 230.
In order to facilitate timely pressure relief and liquid leakage of the liquid in the output pipeline 310, the medium input device 200 further includes a fourth electromagnetic valve 250, a fourth pneumatic control valve 260 and a manual pressure relief valve 270, an input end of the fourth pneumatic control valve 260 is connected with the output pipeline 310, an output end of the fourth pneumatic control valve 260 is connected with the medium tank 210, an output end of the fourth electromagnetic valve 250 is connected with a control end of the fourth pneumatic control valve 260, and an input end of the fourth electromagnetic valve 250 is connected with a compressed air source; the input end of the manual pressure relief valve 270 is connected to the output pipeline 310, and the output end of the manual pressure relief valve 270 is connected to the medium tank 210. When the medium output device 200 fills the liquid into the workpiece 500 and the output pipeline 310, the manual pressure relief valve 270 and the fourth pneumatic valve 260 are opened to facilitate the discharge of the gas in the output pipeline 310, and after the output pipeline 310 is determined to be filled with the liquid, the manual pressure relief valve 270 and the fourth pneumatic valve 260 can be closed. The fourth solenoid valve 250 may be a normally closed solenoid valve, and is powered on when working, so that the gas of the compressed gas source reaches the control end of the fourth pneumatic control valve 260 through the fourth solenoid valve 250.
In order to adapt to the air pressure fatigue test condition, the pressure alternating tester 1000 in the embodiment of the present invention further includes an alternating air pressure source device 400, wherein the alternating air pressure source device 400 is used for inputting alternating air pressure gas to the workpiece 500 to be tested; the alternating air pressure source device 400 comprises an air storage pump 401 connected with a compressed air source, a first electric proportional valve 402 connected with the air storage pump 401, and a fifth electromagnetic valve 403 connected with an output end of the first electric proportional valve 402, wherein an output end of the fifth electromagnetic valve 403 is connected with an alternating air source output pipeline 404, and a tail end of the alternating air source output pipeline 404 is connected with the workpiece 500 to be tested. The fifth electromagnetic valve 403 may be a normally closed electromagnetic valve, and when an alternating air pressure needs to be input to the workpiece 500 to be processed, the fifth electromagnetic valve 403 may be energized. When the output air pressure needs to be regulated, the input voltage of the first electric proportional valve is regulated, and the input voltage of the first electric proportional valve can be controlled by outputting different voltages through a position changer according to the change of the output air pressure.
The embodiment of the utility model provides an alternating air pressure source equipment 400, not only can export the positive pressure that changes, also can export the negative pressure that changes, specifically, alternating air pressure source equipment 400 still include vacuum pump 405, with vacuum tank 406 that vacuum pump 405 connects, with the second electric proportional valve 407 that vacuum tank 406 is connected, the output of second electric proportional valve 407 with fifth solenoid valve 403 is connected, the output of first electric proportional valve 402 with the first input of fifth solenoid valve 403 is connected, the output of second electric proportional valve 407 with the second input of fifth solenoid valve 403 is connected, fifth solenoid valve 403 be used for with the output of second electric proportional valve 407 or the output of first electric proportional valve 402 with alternating air supply output pipeline 404 UNICOM. The second electric proportional valve 407 regulates the output negative pressure value, and the fifth electromagnetic valve 403 switches between positive pressure and negative pressure, so as to realize different pressure test conditions. The fifth solenoid valve 403 may be a pilot solenoid valve. When the output air pressure needs to be regulated, the input voltages of the first electric proportional valve and the second electric proportional valve are adjusted, and the input voltages of the first electric proportional valve and the second electric proportional valve are controlled by outputting different voltages through the position changer according to the change of the output air pressure
In order to visually display the pressure on the alternating air source output pipeline 404, the alternating air pressure source equipment 400 further comprises a digital display meter 408 and a pressure sensor 409, the pressure sensor 409 is connected with the alternating air source output pipeline 404, and the digital display meter 408 is electrically connected with the pressure sensor 409.
The embodiment of the utility model provides an in pressure alternation testing machine both can do water pressure alternation test, also can do oil pressure alternation test, specifically, hold water or oil in the medium groove 210.
The embodiment of the utility model provides an in pressure alternation testing machine 1000 utilizes alternation air pressure source equipment 400 can carry out the air pulse test to profit radiator, and pressure range is: -0.05MPa to 0.5 MPa; the alternating pressure source equipment 300 can be used for realizing an oil low-pressure pulse test, and the decompression cylinder 306 can be used for outputting alternating pressure, wherein the output pressure is 0.1-1 MPa; the oil medium pressure pulse test can also be realized by using an alternating pressure source device 300, and alternating pressure is output by using the first pressure cylinder 307, wherein the output pressure is 1-6 MPa; the oil high-pressure pulse test can also be realized by using an alternating pressure source device 300, and alternating pressure is output by using the second pressure cylinder 309, wherein the output pressure is 6-90 MPa; the water low pressure pulse test can also be realized by using the alternating pressure source equipment 300, and the alternating pressure can be output by using the decompression cylinder 306, wherein the output pressure is 0.1 MPa-1 MPa. The pressure reducing cylinder 306, the first pressure cylinder 307, and the second pressure cylinder 309 are provided with different pressure area ratios to realize the functions of pressure increase or pressure reduction.
The embodiment of the utility model provides an in pressure alternation testing machine 1000, still be provided with equipment such as conventional filter, valve, energy storage ware, pressure sensor, manometer on the pipeline, specifically, still be provided with oil return filter 319 between cold oil machine 318 and the oil tank 301, the output of oil pump 302 is connected with second check valve 320, the output of second check valve 320 is connected with high-pressure filter 321, high-pressure filter 321's output is connected with the input of each servo valve, high-pressure filter 321's output still is connected with proportional overflow valve 322, proportional overflow valve 322's output with oil tank 301 is connected, the output of oil pump 302 still is provided with relief valve 323, relief valve 323's output with oil tank 301 connects. The output end of the high-pressure filter 321 may also be connected to the accumulator 324, the reversing solenoid valve 325 may be a normally open solenoid valve, and the hydraulic oil output by the oil pump 302 may flow back to the oil tank 301 through the reversing solenoid valve 325. The output of each servo valve is also provided with a servo valve accumulator 326 for stabilizing the output pressure. The embodiment of the utility model provides an in pressure alternation testing machine 1000 in still be provided with compressed air source interface 601 for be connected with compressed air source, insert compressed gas, compressed gas's atmospheric pressure 5 ~ 7bar, compressed air source interface 601 is connected with pressure regulating filter oil fog ware 602, and compressed gas utilizes after filtering.
As shown in fig. 2, the utility model provides a pressure alternation tester 1000 overall arrangement is as follows, and pulse control cabinet 701 next door sets up control cabinet 702, and the control cabinet 702 next door sets up high low temperature oil groove 211, and high low temperature oil groove next door sets up high low temperature basin 212, compressed air source 600, and compressed air source 600 next door is provided with pulse equipment cabinet 703, compressed air source 600 is used for providing compressed gas, the main part setting of medium input device 200, alternating pressure source equipment 300 and alternating pressure source equipment 400 is in pulse equipment cabinet 703, high low temperature basin 212 next door sets up cold oil machine 318, pulse equipment cabinet 703 sets up insulation can 100. The pulse control cabinet 701 is used for outputting electric signals and power to each of the medium input device 200, the alternating pressure source device 300 and the alternating air pressure source device 400. In some embodiments, the pressure tester can work without a control cabinet, and alternating pressure tests can be performed by manually powering on each device according to test requirements.
The utility model provides a pressure alternation testing machine realizes different test demands through setting up decompression cylinder, first pressure cylinder, the work of second pressure cylinder cooperation servo valve, has practiced thrift equipment cost. The medium input equipment is adopted, so that the medium liquid can be conveniently filled into the workpiece to be detected, the operation is convenient and quick, and meanwhile, the medium input equipment also fills the medium liquid into the output pipeline, the decompression cylinder, the first pressure cylinder and the second pressure cylinder; and then different electric signals are conducted to the servo valve, so that the decompression cylinder, the first pressure cylinder and the second pressure cylinder output different pressures, and meanwhile, the first one-way valve blocks pressure liquid from flowing into the medium pump, so that the medium pump is protected.
In the present application, the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "plurality" means two or more unless expressly limited otherwise.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pressure alternation tester is characterized by comprising an environment box, a medium input device and an alternating pressure source device; the environment box is used for accommodating a workpiece to be tested and setting a test temperature; the medium input device comprises a medium groove, a medium pump coupled with the medium groove and a first one-way valve coupled with the output end of the medium pump; the alternating pressure source equipment comprises an oil tank, an oil pump connected with the oil tank, a first servo valve, a second servo valve and a third servo valve connected with the oil pump, a decompression cylinder connected with the output end of the first servo valve, a first boosting cylinder connected with the output end of the second servo valve, a second boosting cylinder connected with the output end of the third servo valve and an output pipeline, wherein the output ends of the decompression cylinder, the first boosting cylinder and the second boosting cylinder are coupled with the output pipeline; the output end of the first one-way valve is connected with the output pipeline, the tail end of the output pipeline is connected with a tested workpiece contained in the environment box, and the rated output pressure of the first pressure cylinder is smaller than the rated output pressure of the second pressure cylinder.
2. The pressure alternation tester as claimed in claim 1, wherein the alternating pressure source device further comprises a first pneumatic control valve, a first electromagnetic valve, a second pneumatic control valve, a second electromagnetic valve, a third pneumatic control valve and a third electromagnetic valve, wherein the input end of the first pneumatic control valve is connected with the output end of the decompression cylinder, the output end of the first pneumatic control valve is connected with the output pipeline, the output end of the first electromagnetic valve is connected with the control end of the first pneumatic control valve, and the input end of the first electromagnetic valve is connected with a compressed air source; the input end of the second pneumatic control valve is connected with the output end of the first booster cylinder, the output end of the second pneumatic control valve is connected with the output pipeline, the output end of the second electromagnetic valve is connected with the control end of the second pneumatic control valve, and the input end of the second electromagnetic valve is connected with a compressed air source; the input end of the third pneumatic control valve is connected with the output end of the second pressure cylinder, the output end of the third pneumatic control valve is connected with the output pipeline, the output end of the third electromagnetic valve is connected with the control end of the third pneumatic control valve, and the input end of the third electromagnetic valve is connected with a compressed air source.
3. The pressure alternation tester as claimed in claim 1, wherein a pressure reducing valve is provided in the line between the oil pump and the input end of the first servo valve in the alternating pressure source device.
4. The pressure alternation tester as claimed in claim 1, wherein the alternating pressure source device further comprises a cold oil machine connected to the oil tank.
5. The pressure alternation tester as claimed in claim 1, wherein the medium input device further comprises a cooler, an output end of the medium pump is connected to the cooler, and an input end of the first check valve is connected to the cooler.
6. The pressure alternation tester as claimed in claim 1, wherein the medium input device further comprises a fourth solenoid valve, a fourth pneumatic control valve and a manual pressure relief valve, wherein the input end of the fourth pneumatic control valve is connected with the output pipeline, the output end of the fourth pneumatic control valve is connected with the medium tank, the output end of the fourth solenoid valve is connected with the control end of the fourth pneumatic control valve, and the input end of the fourth solenoid valve is connected with the compressed air source; the input end of the manual pressure relief valve is connected with the output pipeline, and the output end of the manual pressure relief valve is connected with the medium groove.
7. The pressure alternation tester as claimed in any one of claims 1 to 6, further comprising an alternating air pressure source device for inputting alternating air pressure gas to the workpiece to be tested; the alternating air pressure source equipment comprises an air storage pump connected with a compressed air source, a first electric proportional valve connected with the air storage pump, and a fifth electromagnetic valve connected with the output end of the first electric proportional valve, the output end of the fifth electromagnetic valve is connected with an alternating air source output pipeline, and the tail end of the alternating air source output pipeline is connected with the workpiece to be detected.
8. The pressure alternation tester as claimed in claim 7, wherein the alternating air pressure source device further comprises a vacuum pump, a vacuum tank connected to the vacuum pump, and a second electric proportional valve connected to the vacuum tank, wherein an output end of the second electric proportional valve is connected to the fifth electromagnetic valve, an output end of the first electric proportional valve is connected to a first input end of the fifth electromagnetic valve, an output end of the second electric proportional valve is connected to a second input end of the fifth electromagnetic valve, and the fifth electromagnetic valve is used for communicating an output end of the second electric proportional valve or an output end of the first electric proportional valve with the alternating air source output pipeline.
9. The pressure alternation tester as claimed in claim 7, wherein the alternating air pressure source device further comprises a digital display meter and a pressure sensor, the pressure sensor is connected with the alternating air source output pipeline, and the digital display meter is electrically connected with the pressure sensor.
10. A pressure alternation tester as claimed in any one of claims 1 to 6, wherein the medium tank contains water or oil.
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| CN202120911231.3U CN215262362U (en) | 2021-04-29 | 2021-04-29 | Pressure alternation testing machine |
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| CN202120911231.3U CN215262362U (en) | 2021-04-29 | 2021-04-29 | Pressure alternation testing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453034A (en) * | 2021-12-24 | 2022-05-10 | 天津航天瑞莱科技有限公司 | Multipurpose positive and negative pressure environment test box device and using method thereof |
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2021
- 2021-04-29 CN CN202120911231.3U patent/CN215262362U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114453034A (en) * | 2021-12-24 | 2022-05-10 | 天津航天瑞莱科技有限公司 | Multipurpose positive and negative pressure environment test box device and using method thereof |
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