CN2083741U - Dynamic property tester for hydraulic support safety valve - Google Patents
Dynamic property tester for hydraulic support safety valve Download PDFInfo
- Publication number
- CN2083741U CN2083741U CN 90200910 CN90200910U CN2083741U CN 2083741 U CN2083741 U CN 2083741U CN 90200910 CN90200910 CN 90200910 CN 90200910 U CN90200910 U CN 90200910U CN 2083741 U CN2083741 U CN 2083741U
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- valve
- safety valve
- pressure
- high pressure
- piston
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- Safety Valves (AREA)
Abstract
The utility model relates to a dynamic property tester for hydraulic support safety valve for mines, comprising a transient flow generator, a hydraulic control system, a high pressure pump station, pressure, a flow rate measurement system and a computer data collecting and processing system. The utility model can proceed to dynamic performance test to the input transient flow of the tested safety valve, and the maximum transient flow can be up to 0.1666 cubic meters per second, then the using requirements of the existing safety valve of various specifications are satisfied. The computer measuring system can proceed to calculation and unit conversion and can display the testing result or print and output; simultaneously, the testing data can be treated further to obtain the frequency response characteristic curve of the tested safety valve in order to correct the control volume of the safety valve and predict the actual dynamic property of the safety valve.
Description
The utility model relates to the dynamic property test of mine hydraulic bracket safety valve, particularly high-flow safety valve and detects.
Support apparatus in the coal production all need be provided with safety valve as the hydraulic system of hydraulic support, to guarantee the safe handling of equipment.Rock burst and the rock stratum violent mining area of vibrations is being arranged, in the hydraulic system in being provided with, the safety valve of low discharge, also high-flow safety valve need be set.The safety valve of all size all must carry out type approval test and delivery test, with the design objective of confirming that it is reached; In addition, safety valve also must make a service test after using certain hour, to determine its functional reliability.This test mainly is that set pressure is measured and the dynamic property test.Domestic and international existing test unit has two types at present: one, test unit as shown in Figure 4, it is provided with the pressing machine 1 of band large hydraulic accumulator pumping plant, tested safety valve 3 is contained on the hydraulic cylinder 2 of hydraulic support, apply dynamic load with pressing machine column piston then, measure the movement velocity of piston, be converted into transient flow by safety valve, measure the dynamic pressure profile of safety valve import simultaneously, to determine the pressure overshoot amount.This testing equipment is huge, and the lifting installment work during test is very heavy.The PQZ-1092 shock table of connection group Germany promptly belongs to this type of, and its maximum transient flow can only reach 0.0333m
3/ s～0.0416m
3About/s.Its two, as shown in Figure 5, the reversal valve 1 of highly pressurised liquid by driven by motor directly to the impact of exerting pressure of tested safety valve 2, measured safety valve intake pressure and transient flow to determine its dynamic perfromance.The maximum flow that this test unit can reach generally has only 8.33 * 10
-4m
3/ s, the commutating frequency of reversal valve has only 1.33HZ.At present, the maximum transient flow of the design of the high-flow safety valve of design has both at home and abroad reached 0.1666m
3/ s, obviously, above-mentioned two class test units all can not satisfy testing requirements.
The purpose of this utility model provides and a kind ofly can reach 0.1666m to maximum transient flow
3The hydraulic support safety valve of all size of/s carries out the test unit of dynamic test and performance parameter detection, to satisfy the testing requirements of the various safety valve that have specification now.
For achieving the above object, the utility model design hydraulic system, two independently high pressure pumping plant, pressure and Flow Measuring System and microcomputer data acquisition and disposal system that transient flow generator, control process of the test arranged.
The transient flow generator is made up of high pressure cylinder, loading piston cylinder, small oil tank, seal etc.Be provided with high pressure chest and low-pressure cavity in the high pressure cylinder, separate with cone valve between two chambers; Tensimeter is housed on high pressure cylinder; One end of high pressure cylinder links with loading piston cylinder, and the other end and small oil tank link.The loading piston and the low-pressure cavity that load in the piston cylinder are adjacent, and acceleration transducer is equipped with in the end that loads piston rod.Connecting elongated elastic prestress bar on the cone valve, an end of this bar small oil tank piston that is being connected has a removable thin metal film sheet in the bottom of small oil tank, and this diaphragm is fixed with the diaphragm set bolt, and the end of small oil tank is the draining lid.The point of attachment of each parts of transient flow generator is provided with seal element.
The hydraulic system of control process of the test includes 4 retaining valves, 3 reversal valves, 2 surplus valves, 2 parts such as tensimeter, charge valve, hand-operated direction valve and pressure switch, links by petroleum pipeline between each parts.
Pressure, Flow Measuring System and microcomputer data acquisition, disposal system are made up of peripherals such as acceleration transducer, charge amplifier, wave filter, pressure transducer, prime amplifier, A/D converter, microcomputer and printers.
The high pressure pumping plant is made up of motor, oil pump, retaining valve, surplus valve, fuel tank etc.
The utility model carries out the dynamic property test by the transient flow generator to tested safety valve input transient flow, and maximum transient flow can reach 0.1666m
3/ s, thus satisfied the request for utilization of present all size safety valve; Flow and pressure-measuring system can be measured the intake pressure of corresponding transient flow and the following safety valve of 150MPa, by high precision (12Bit) high-speed a/d interface data are sent into microcomputer, carry out corresponding calculated and unit conversion, and test findings (comprising transient pressure, flow curve and characteristic parameter) is presented on the computer display perhaps printout; Simultaneously, system can be for further processing to experimental data, obtains the Frequency Response curve of tested safety valve, so that carry out the correction of safety valve control volume, thereby predicts that this valve installs to the actual dynamic perfromance on the hydraulic support.
Below in conjunction with accompanying drawing the utility model being done one describes in detail.
Fig. 1 is a hydraulic support safety valve dynamic characteristic test schematic diagram of device.Among the figure: 1, tested safety valve 2, load piston 3, low-pressure cavity 4, high pressure chest 5, cone valve 6, tensimeter 7, elastic prestress bar 8, small oil tank piston 9, explosion chamber 10, thin metal film sheet 11, draining lid 12,15,18,21, retaining valve 13,14,23, reversal valve 16,22, surplus valve 17,20, tensimeter 19, charge valve 24, hand-operated direction valve 25,26, high pressure pumping plant 27, acceleration transducer 28, pressure transducer 29, prime amplifier 30, A/D converter 31, charge amplifier 32, wave filter 33, microcomputer, 34, peripherals such as printer 35, pressure switch.
Fig. 2 is the pilot system electrical schematic;
Fig. 3 is transient flow generator architecture figure.
Hydraulic support safety valve dynamic characteristic test device shown in Figure 1 comprises the transient flow generator, the hydraulic system of control process of the test, two high pressure pumping plants independently, pressure, Flow Measuring System and microcomputer data acquisition and disposal system five major parts.
The structure of transient flow generator as shown in Figure 3, it mainly by high pressure cylinder 43, load piston cylinder 37, small oil tank 49, O- ring seal 38,39,41,44,45,47 etc. and form.Be provided with the high pressure chest 4 of full of liquid in the high pressure cylinder 43 and be the low-pressure cavity 3 of low pressure before on-test, separate with cone valve 5 between two chambers, elastic prestress bar 7 followed in cone valve 5 first line of a couplet, tensimeter 6(is housed on high pressure cylinder sees Fig. 1), an end of high pressure cylinder 43 is to load piston cylinder 37, the two is fixing with bolt 36, load the piston 2 of loading is arranged in the piston cylinder 37, it is adjacent with low-pressure cavity 3, and the connection place is provided with valve pocket 40 and valve seat 42, and by O- ring seal 38,39,41 sealings.The other end of high pressure cylinder 43 is small oil tanks 49, one end of elastic prestress bar 7 is connected with small oil tank piston 8, fluid pressure by explosion chamber 9 loads bar 7, make its compression, produce precompression stress, removable thin metal film sheet 10 is housed in the bottom of small oil tank, this diaphragm is fixing with diaphragm set bolt 48, the end of small oil tank is a draining lid 11, and its connection place is respectively by O-ring seal 44,45,47 and sealing shroud 46 sealings.
The hydraulic system of control process of the test includes retaining valve 12,15,18,21, reversal valve 13,14,23, surplus valve 16,22, tensimeter 17,20, charge valve 19, parts such as hand-operated direction valve 24 and pressure switch 35.Hand-operated direction valve 24 connects with pumping plant 26, retaining valve 12, reversal valve 23 respectively; Reversal valve 23 connects with reversal valve 14, retaining valve 21 and pressure switch 35; Reversal valve 14 is connected with retaining valve 15,21 reversal valves 13; Retaining valve 15 connects with the explosion chamber 9 of tensimeter 17, surplus valve 16, small oil tank; Retaining valve 21 connects with tensimeter 20, charge valve 19, surplus valve 22; Charge valve 19 connects with retaining valve 18, and retaining valve 18 connects with high pressure pumping plant 25 and high pressure cylinder 43 again.The import of tested safety valve 1 links with the chamber that loads piston cylinder 37 left sides.
Pressure, Flow Measuring System comprise elements such as acceleration transducer 27, pressure transducer 28, prime amplifier 29, charge amplifier 31, wave filter 32.The tailpiece of the piston rod that loads piston 2 is being adorned acceleration transducer 27, enters microcomputer 33 by anti-mixed low-pass filter 32 and converter 30 with acceleration signal after charge amplifier 31 amplifies, and finishes flow measurement.The intake pressure of tested safety valve 1 enters microcomputer 33 by pressure transducer 28 through prime amplifier 29 and converter 30, finishes pressure survey.
Microcomputer data acquisition and disposal system include peripherals 34 such as 12 high-speed a/d converters 30, microcomputer 33 and printer.
25,26 of high pressure pumping plants are made up of motor, oil pump, retaining valve, surplus valve, fuel tank etc.
When pumping plant 26 passes through hydraulic valve 24 → valve 23 → valve 14 → valve 15 to explosion chamber 9 fuel feeding, pressure rises, the compression stress of elastic prestress bar 7 increases gradually, when the yield that increases near bar 7 materials, thin metal film sheet 10 breaks, pressure in the chamber 9 drops sharply to atmospheric pressure, elastic rod 7 unloads suddenly, elastic wave is with the axial propagation of the velocity of sound along bar 7, when arriving rod end cone valve 5 is opened fast, the pressure that causes high pressure chest 4 opens it by loading the tested valve 1 of hydraulic shock that piston 2 and its left chamber are full of in advance, produces very big drawoff discharge.The tailpiece of the piston rod that loads piston 2 is equipped with acceleration transducer 27, the acceleration signal of this acceleration transducer is after charge amplifier 31 amplifies, by the anti-low-pass filter 32 that mixes, A/D converter 30 enters microcomputer 33, after digital filtering and integral operation, multiply by the annulus area that loads piston 2 left sides then, obtain the transient flow data.The intake pressure of tested safety valve 1 is measured by pressure transducer 28, enters microcomputer 33 through prime amplifier 29 and 12 high-speed a/d converters 30.The highest set pressure of tested safety valve is 63MPa, high pressure chest 4 is by high pressure pumping plant 25 feed flows, and top pressure is 80MPa, changes the difference of high pressure chest pressure and tested minimum setting pressure of relief valve, can make tested safety valve by different transient flows, the maximal value of transient flow can reach 0.1666m
3/ s.The pressure, flow measurement, the data acquisition and processing (DAP) system that form by acceleration transducer 27, pressure transducer 28, prime amplifier 29, charge amplifier 31, A/D converter 30 and peripherals such as microcomputer 33 and printer 34 etc., the measurement, data acquisition, transient pressure and the flow curve that are used for realizing transient pressure and flow signal show the expansion of part segment of curve; Read the numerical value of any point on the curve with double vernier; The characteristic point data of selecting on the curve and the opening pressure of tested valve, the automatic printout of measurement results such as maximum transient flow, the highest transient pressure, pressure overshoot rate.Simultaneously, system software has the forecast function that safety valve is contained in the actual working characteristics on the support, promptly according to the pressure, the flow signal that record, through fast Fourier transformation and other corresponding computing, draw the frequency response data of tested safety valve, these data obtain the frequency response curve of safety valve under actual working state after the correction of safety valve working control volume, predict actual working characteristics thus.
Narrate processes and operations method of the present utility model below in conjunction with Fig. 1 and Fig. 2.Original state: load piston 2 and be in the right side, finish changing new diaphragm 10, the electromagnet of whole motors of system and solenoid directional control valve all is in off-position, and the set pressure of pressure switch 35 is lower than the burst pressure of diaphragm 10.The course of work: make hand-operated direction valve 24 be in the right side state, by switch S a, pumping plant 26 starts, it the fluid of confession through valve 23,14,13 oil returns.By switch S
2, K
2Energising, K
2The normally opened contact closure, the ZDT energising, to explosion chamber 9 fuel feeding, piston 8 moves to left pumping plant 26 through retaining valve 15, by elastic prestress bar 7 cone valve 5 cuts out, when the pressure of chamber 9 and corresponding pipeline rises to the set pressure of pressure switch 35, K
2Disconnect, the ZDT outage, the oil of pumping plant 26 outputs is through valve 13 oil returns, and retaining valve 15 keep-ups pressure chamber 9, and cone valve 5 continues to cut out; Pumping plant 25 starts simultaneously, and the fluid of getting is through retaining valve 18 and charge valve 19 oil returns, and this moment, pumping plant 25,26 all was in unloading condition.Handle hand-operated direction valve 24, make it be in leftward position, pumping plant 26 rises its pressure through the snout cavity fuel feeding of retaining valve 12 to tested valve 1, the original pressure of tested valve 1 in the time of can measuring the opening pressure of tested valve 1 this moment or set dynamic test.Then hand-operated direction valve 24 is got back to right positions, by switch S
3, make K
3, 3DT energising, will cut off through the oil return line of reversal valve 13, the plunger shaft that pressure oil enters charge valve 19 through retaining valve 21 is closed this valve, pumping plant 25 rises its pressure to high pressure chest 4 fuel feeding.The set pressure of surplus valve 22 is lower than the set pressure of pressure switch 35, so pressure switch 35 resets.Observe tensimeter 6, when pressure rises to the required pressure of test, by switch S
b, pumping plant 25 quits work, and is kept the pressure of high pressure chest 4 by retaining valve 18.When pressing switch S
2The time, K
2, 2DT energising, pumping plant 26 is to explosion chamber 9 fuel feeding, cavity pressure rises, until diaphragm 10 explosions.The diaphragm explosion, the 7 unexpected off-loads of elastic prestress bar, because stress wave reflection, cone valve 5 valve seat that speeds away is opened, so load the percussive action that piston 2 is subjected to high pressure chest 4 pressure, this compression shock arrives the import of tested valve 1 by the liquid transfer that loads piston 2 left sides, valve 1 is opened, liquid is released by tested valve 1, loads piston 2 and moves to left, and its chamber, left and right sides and high pressure chest 4 pressure descend, when pressure drops to the closing presure of tested valve 1, tested valve cuts out, and loads piston 2 and stops to move to left, and process of the test finishes.By switch S
2, 2DT outage, by switch S
3, 3DT outage; By switch S
1, 1DT energising, hydraulic control one-way valve 21 is opened, high pressure chest 4 is by charge valve 19 releases.Handle hand valve 24, make it be in the left side state, the hydraulic oil of pumping plant 26 enters the chamber, left side that loads piston 2 through retaining valve 12, and loading piston 2 is moved to right, and right chamber fluid is got back to high pressure chest 4 through cone valve 5, loads piston 2 and moves on to the least significant, gets back to initial state.Here pumping plant 25 only could start under the situation of pumping plant 26 operations.Automatic data collection in process of the test after the off-test shows the result, printout or do secondary treating.
Claims (1)
1, a kind of mine hydraulic bracket safety valve dynamic characteristic test device, its pressure, flow measurement and microcomputer data acquisition, disposal system comprise:
Peripherals 34 such as → A/D converter 30 → microcomputer 33 and printer is characterized in that: the hydraulic system, two that this design of test has transient flow generator, a control process of the test be the high pressure pumping plant independently;
A, the transient flow generator includes high pressure cylinder, the loading piston cylinder that links with the high pressure cylinder two ends respectively, the seal that small oil tank and each cylinder body point of attachment are set etc., be provided with high pressure chest and low-pressure cavity in the high pressure cylinder, separate with cone valve between two chambers, tensimeter is housed on the high pressure cylinder, the loading piston and the low-pressure cavity that load in the piston cylinder are adjacent, the end that loads piston rod is an acceleration transducer, connecting the elastic prestress bar on the cone valve, one end of this bar connects with the small oil tank piston, one removable thin metal film sheet is arranged in the bottom of small oil tank, this diaphragm bolt, the end of small oil tank are the draining lids;
The hydraulic system of b, control process of the test comprises retaining valve, reversal valve, surplus valve, tensimeter, charge valve, hand-operated direction valve and pressure switch etc., links by petroleum pipeline between each parts, and its connecting mode is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90200910 CN2083741U (en) | 1990-01-20 | 1990-01-20 | Dynamic property tester for hydraulic support safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90200910 CN2083741U (en) | 1990-01-20 | 1990-01-20 | Dynamic property tester for hydraulic support safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2083741U true CN2083741U (en) | 1991-08-28 |
Family
ID=4882625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90200910 Withdrawn CN2083741U (en) | 1990-01-20 | 1990-01-20 | Dynamic property tester for hydraulic support safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2083741U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557395C (en) * | 2008-01-07 | 2009-11-04 | 浙江大学 | Ultra-high pressure air-actuated clearance-dimension-pressure characteristic test apparatus |
| CN101886647A (en) * | 2010-06-20 | 2010-11-17 | 无锡市海航电液伺服***有限公司 | Servo water pressure control device |
| CN103573753A (en) * | 2013-11-05 | 2014-02-12 | 中联重科股份有限公司 | Transient test loop of hydraulic valve |
| CN103900810A (en) * | 2014-04-16 | 2014-07-02 | 江苏二马液压元件有限公司 | Durability test table for safety valve |
| CN104285067A (en) * | 2012-03-15 | 2015-01-14 | 费斯托股份有限两合公司 | Fluid system and method for operating a fluid system |
| CN104695987A (en) * | 2015-02-13 | 2015-06-10 | 煤炭科学技术研究院有限公司 | Hydraulic control check valve for hydraulic support |
| CN105090172A (en) * | 2014-12-19 | 2015-11-25 | 华北水利水电大学 | Pressure distribution measuring device for cavity sidewall and valve core wall surface of hydraulic cone valve |
| CN105605032A (en) * | 2014-10-30 | 2016-05-25 | 北京精密机电控制设备研究所 | Dynamic loading device for dynamic pressure feedback test of servo valve |
| CN106369004A (en) * | 2016-09-12 | 2017-02-01 | 天津大学 | Integrated motor-pump-control single-piston rod symmetrical hydraulic cylinder with built-in displacement sensor |
| CN107165877A (en) * | 2017-06-14 | 2017-09-15 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN107727374A (en) * | 2017-05-05 | 2018-02-23 | 太原理工大学 | Mine pipeline liquid conveys water valve simulator stand |
| CN109632232A (en) * | 2019-01-08 | 2019-04-16 | 煤炭科学技术研究院有限公司 | A kind of column valve unloading impact test apparatus |
| CN109653779A (en) * | 2019-01-09 | 2019-04-19 | 天地科技股份有限公司 | A kind of fully-mechanized mining working coal mining recycles the dynamic prediction method of interior hydraulic support load |
-
1990
- 1990-01-20 CN CN 90200910 patent/CN2083741U/en not_active Withdrawn
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100557395C (en) * | 2008-01-07 | 2009-11-04 | 浙江大学 | Ultra-high pressure air-actuated clearance-dimension-pressure characteristic test apparatus |
| CN101886647A (en) * | 2010-06-20 | 2010-11-17 | 无锡市海航电液伺服***有限公司 | Servo water pressure control device |
| CN101886647B (en) * | 2010-06-20 | 2012-07-04 | 无锡市海航电液伺服***股份有限公司 | Servo water pressure control device |
| CN104285067A (en) * | 2012-03-15 | 2015-01-14 | 费斯托股份有限两合公司 | Fluid system and method for operating a fluid system |
| CN103573753B (en) * | 2013-11-05 | 2016-02-03 | 中联重科股份有限公司 | Transient test loop of hydraulic valve |
| CN103573753A (en) * | 2013-11-05 | 2014-02-12 | 中联重科股份有限公司 | Transient test loop of hydraulic valve |
| CN103900810A (en) * | 2014-04-16 | 2014-07-02 | 江苏二马液压元件有限公司 | Durability test table for safety valve |
| CN105605032A (en) * | 2014-10-30 | 2016-05-25 | 北京精密机电控制设备研究所 | Dynamic loading device for dynamic pressure feedback test of servo valve |
| CN105090172A (en) * | 2014-12-19 | 2015-11-25 | 华北水利水电大学 | Pressure distribution measuring device for cavity sidewall and valve core wall surface of hydraulic cone valve |
| CN104695987A (en) * | 2015-02-13 | 2015-06-10 | 煤炭科学技术研究院有限公司 | Hydraulic control check valve for hydraulic support |
| CN106369004A (en) * | 2016-09-12 | 2017-02-01 | 天津大学 | Integrated motor-pump-control single-piston rod symmetrical hydraulic cylinder with built-in displacement sensor |
| CN106369004B (en) * | 2016-09-12 | 2018-03-13 | 天津大学 | Inbuilt displacement sensor integrated electric pump control list rod symmetrical hydraulic cylinder |
| CN107727374A (en) * | 2017-05-05 | 2018-02-23 | 太原理工大学 | Mine pipeline liquid conveys water valve simulator stand |
| CN107165877A (en) * | 2017-06-14 | 2017-09-15 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN107165877B (en) * | 2017-06-14 | 2018-07-27 | 燕山大学 | A kind of big orifice extra-high voltage liquid proportional inserted valve dynamic performance and testing |
| CN109632232A (en) * | 2019-01-08 | 2019-04-16 | 煤炭科学技术研究院有限公司 | A kind of column valve unloading impact test apparatus |
| CN109653779A (en) * | 2019-01-09 | 2019-04-19 | 天地科技股份有限公司 | A kind of fully-mechanized mining working coal mining recycles the dynamic prediction method of interior hydraulic support load |
| CN109653779B (en) * | 2019-01-09 | 2020-05-22 | 天地科技股份有限公司 | Dynamic prediction method for hydraulic support load in fully mechanized mining face coal mining cycle |
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| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |