CN101476992A - Load dynamic pretest system for hoisting jack - Google Patents
Load dynamic pretest system for hoisting jack Download PDFInfo
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- CN101476992A CN101476992A CNA2009100960880A CN200910096088A CN101476992A CN 101476992 A CN101476992 A CN 101476992A CN A2009100960880 A CNA2009100960880 A CN A2009100960880A CN 200910096088 A CN200910096088 A CN 200910096088A CN 101476992 A CN101476992 A CN 101476992A
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Abstract
The invention discloses a jack loading dynamic pretesting system, which comprises a testing bench, a hydraulic pressure constant system, a pressure sensor, a displacement sensor and a computer data processing system. The system is characterized in that the hydraulic pressure constant system provides constant pressure to act on the jack in the stroke of the jack; the pressure sensor acquires the data of actual pressure born by the jack in the stroke; the displacement sensor is arranged on and linked with the hydraulic pressure constant system to acquire the stroke position data of the jack; and the computer data processing system processes the acquired pressure data and stroke position data. Compared with a general jack tester, the testing system can precisely test the relation of the pressure bearing situation and the stroke position of the jack on the one hand, and can greatly improve the pretesting speed, reduce labor intensity and greatly improve the jack preventive test level on the other hand.
Description
Technical field
The present invention relates to the apparatus and method of load dynamic pretest system for hoisting jack.
Background technology
Lifting jack is mainly used in work such as lifting, support weight.Its structure is lightly firm, flexibility and reliability, and a people is portability and operation.Lifting jack is to lift part as equipment with rigid top, the light little hoisting device of jacking weight in little stroke by top bracket or bottom claw.Lifting jack is divided into by principle of work:
(1) screw jack: adopt screw rod or lift the lifting jack of part by the jacking sleeve that screw rod promotes as rigid top.
(2) tooth bar lifting jack: adopt tooth bar to lift the lifting jack of part as rigid top.
(3) hydraulic jack: adopt plunger or hydraulic cylinder to lift the lifting jack of part as rigid top.
Lifting jack is widely used in the construction, production, maintenance of power engineering, especially in operations such as equipment installation, lifting, dismounting, debugging, lifting jack is operating personnel's a powerful arm, and the reliability of its carrying will be directly connected to the safety of operating personnel and equipment.
" power construction trouble free service rules " (DL 5009.1-2002, DL 5009.2-2004, DL5009.3-1997) is the mandatory industry standard of power construction safety in production aspect, and it is defined as lifting jack--small-sized construction hand-operated tools, and regulation:
(1) the preventive trial project of lifting jack is the static load test, and the test period is 1 year.
(2) static load that loading end is applied is 1.25 times of the maximum nominal load of lifting jack (new products or after overhaul first) or 1.1 times (routine), and load should keep 10min during test.
At present, lifting jack static load prerun method in common is: lifting jack is placed smooth, on the firm and complete test frame base, push rod is risen to 2/3 specified lifting altitude (multi-level piston bar pattern rises to last emersion level 1/2 stroke height), the lifting jack of adjusting screw rod is arranged, to adjust screw rod rises to the highest, employing from rise method (utilize the jacking of lifting jack and increase the pressure of loading end) or outside platen press (adding counterweight) to increase the pressure of loading end, loading end is applied static load, maintenance 10min (should be slow when loading and unloading, must not impact loading or decline suddenly.)。Adopt when rising method, be no more than 1.0% for qualified if pressure descends; When adopting outer platen press, then be qualified if lifting jack can be braked.
Press lifting jack static load prerun method in common, the structure of lifting jack static load test support equipment is very simple, and it mainly partly is made up of pressure transducer 1, pressure data display instrument 5, test board 4, safety guard net etc.Total as shown in Figure 1.
Wherein, pressure transducer is used to respond to the load of lifting jack; The pressure data display converts the pressure signal that pressure transducer sends to digital signal, is presented on the charactron; Test board is used to lay lifting jack, with the safety guard net protection, meets accident in test process to prevent lifting jack around the test board.
The test process of this lifting jack load testing machine is: tested lifting jack is placed on the test board suitable parallels on pad below the lifting jack.Shake jack handle (electronic then starter motor), the rising lifting jack is up to lifting jack is pushed up on the pressure transducer.Then continue the rising lifting jack, the pressure that this moment, pressure transducer was subjected to is exactly the load of lifting jack output, and this pressure is presented on the pressure data display.Observe the pressure data display, do not test needed nominal load, then continue the rising lifting jack, reach till the needed load always if pressure reaches lifting jack.If reached test pressure, illustrate that lifting jack can bear specified load, whether observe lifting jack then has oil leakage phenomenon.If shake handle howsoever, lifting jack does not all reach rated pressure, illustrates that lifting jack can not bear nominal load.
In whole test process, the ejection stroke of lifting jack is fixed, if want to change ejection stroke, then will change the thickness that is placed in the lifting jack lower padding iron, and then the lifting jack that raises again, observes pressure again and changes.
And to the best prerun of lifting jack be: can all realize the detection of full load under different strokes, i.e. load dynamic test prevents that the pressure that lifting jack is exported from not reaching requirement under some stroke.General lifting jack prerun testing machine can only choose several travel point and test, and test process is loaded down with trivial details, needs repeatedly lifting lifting jack, and particularly during the testing large lifting jack, labour intensity is very big.
Summary of the invention
What the present invention will solve is the problems referred to above that prior art exists, aim to provide a kind of load dynamic pretest system for hoisting jack of novelty, in test process, the lifting jack that only need once raise just can be finished global test, and the test data of complete pressure and stroke can be provided by computing machine.
For addressing the above problem, the present invention by the following technical solutions: load dynamic pretest system for hoisting jack, comprise test board, hydraulic constant pressure system, pressure transducer, displacement transducer and computer data processing system, it is characterized in that:
Described test board is used to place tested lifting jack;
Described hydraulic constant pressure system is arranged on the top of described test board, provides constant compression force to act on lifting jack in the stroke of lifting jack;
Described pressure transducer is arranged in the hydraulic constant pressure system and over against described test board, gathers the actual pressure data that lifting jack is born in stroke;
Described displacement transducer be arranged in the described hydraulic constant pressure system and with its interlock, the travel position data of gathering lifting jack;
Described computer data processing system and described pressure transducer and displacement transducer electrically connect, and the result is handled and exported to the pressure data and the travel position data that collect.
Load dynamic pretest system for hoisting jack of the present invention, the hydraulic constant pressure system provides a constant compression force to act on the lifting jack, and no matter where the stroke of lifting jack is, and the hydraulic constant pressure system always can guarantee that the constant pressure on the lifting jack is constant; The actual pressure that pressure transducer is used to test on the lifting jack and is born; Displacement transducer is used to measure the travel position of lifting jack; Pressure data and run-length data collect in the computing machine by data collecting card, are carried out the processing of data by computing machine.
The present invention also will provide a kind of lifting jack load dynamically pre-method for testing, it is characterized in that carrying out according to the following steps: tested lifting jack is placed on the test board, and sets required test pressure on computer data processing system; Open the hydraulic constant pressure system, the hydraulic constant pressure system moves to pressure transducer the top of lifting jack automatically, then lifting jack is applied pressure to required value; Lifting jack is ejected; Under different strokes, the hydraulic constant pressure system keeps constant compression force automatically, up to end of test (EOT); Computer data processing system will be handled from the pressure data and the travel position data of pressure transducer and displacement transducer, write down the pressure of lifting jack in whole elevation process and the variation of stroke automatically.
This test macro is compared with general lifting jack test machine, can test the relation of lifting jack pressurized situation and travel position on the one hand accurately, can accelerate prerun speed greatly on the other hand, reduce labour intensity, greatly improve lifting jack preventive trial level.
As a further improvement on the present invention, be provided with safety guard net around the described test board, in test process, meet accident to prevent lifting jack.
Description of drawings
Fig. 1 is the structural representation of the pre-test-run a machine of jack pressure of prior art.
Fig. 2 is the structural representation of load dynamic pretest system for hoisting jack of the present invention.
Fig. 3 is a load dynamic pretest system for hoisting jack master menu synoptic diagram of the present invention.
Fig. 4 is a load dynamic pretest system for hoisting jack stroke of the present invention menu synoptic diagram at interval.
Fig. 5 is that load dynamic pretest system for hoisting jack stroke of the present invention is provided with synoptic diagram at interval.
Fig. 6 is that load dynamic pretest system for hoisting jack pressure of the present invention is provided with synoptic diagram.
Embodiment
With reference to Fig. 2, load dynamic pretest system for hoisting jack of the present invention comprises test board 4, hydraulic constant pressure system 6, pressure transducer 1, displacement transducer 7 and computer data processing system 8.
Described test board 4 is used to place tested lifting jack 2, is provided with safety guard net around the described test board 4, meets accident in test process to prevent lifting jack.
Described hydraulic constant pressure system 6 is arranged on the top of described test board 4, provides constant compression force to act on lifting jack in the stroke of lifting jack; This hydraulic system is made up of parts such as ram pump, solenoid directional control valve, automatically controlled proportional pressure control valves.Automatically controlled proportional pressure control valve is the key element of hydraulic system, the DBEM10-30/31.5Y/2 pilot proportional surplus valve that we select for use Shanghai upright new hydraulic pressure company to produce, this valve is made up of small-sized DC proportion electro-magnet and direct-acting overflow valve, have be quick on the draw, precision height, the linearity be good.
Described pressure transducer 1 is arranged in the hydraulic constant pressure system 6 and over against described test board 4, gathers the actual pressure data that lifting jack is born in stroke; The C-100t load sensor of selecting for use ZheJiang LanJian weight Technology Co., Ltd to produce, accuracy class reaches 0.1 grade.
Described displacement transducer 7 be arranged in the described hydraulic constant pressure system 6 and with its interlock, the travel position data of gathering lifting jack; Select the linear displacement transducer of U.S. BEI DUNCAN company for use, this sensor adopts ultraprecision conductive plastics substrate and platinum brush to assemble.
Be used to gather the data collecting card of displacement transducer and pressure sensor signal, select 16 AD cards of American National Instrument Instruments company for use, this jig has higher performance.
Described computer data processing system 8 electrically connects with described pressure transducer 1 and displacement transducer 7, and the pressure data and the travel position data that collect are handled.Adopt the high-accuracy data acquisition plate, physical quantitys such as the pressure in the system, displacement are measured, and directly data are sent into computer data processing system by pci bus.Utilize the powerful operational performance of computer data processing system 8 machines, data are handled, and drawn a diagram, generate database, realize the remote data visit.
The dynamically pre-method for testing of lifting jack load of the present invention, carry out according to the following steps:
(1), before starting, load dynamic pretest system for hoisting jack must check in order to ensure safety:
1) whether the protection ground wire is connected;
2) whether the connection line of the sensor of mechanical-hydraulic test board and motor incoming line and computer console is reliable.
(2) the 380V power supply of three-phase four-wire system is input to the terminal row of computer console.
(3) according to test specimen (lifting jack) body height and stretching, extension height, adjust the required height of cushion block.
(4) total power switch that closes, voltage table shows 380V on the computer console; This moment, hydraulic pressure stop button pilot lamp was bright, expression input power connection; Restart hydrostatic control button and Computer power sources switch.
(5) main interface appears in computer monitor, enters master menu (as shown in Figure 3) interface by mouse selected (lifting jack test macro).
(6) can set the lifting jack stroke as requested at interval, by the stroke in " setting " hurdle at interval, the interface notices that the unit of stroke is a millimeter as shown in Figure 4, shows 1=1mm as shown in Figure 5, if each test line range request is identical, then need not each setting.
(7) test according to lifting jack load-bearing capacity (kN) necessary first set pressure (kN), interface as shown in Figure 6 at every turn; As: lifting jack load-bearing capacity 500 (kN) is worth by mouse set pressure 500 (kN).
(8) press in the computer screen (beginning test) button by mouse, and keep a close eye on test specimen (lifting jack) situation, till required test pressure.In test specimen (lifting jack) process of the test, during as the generation leakage of oil, should press (stopping test) button immediately.
(9) finish test after, will show test results on the screen, and printable test data.
What should be understood that is: the foregoing description is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.
Claims (3)
1, load dynamic pretest system for hoisting jack comprises test board (4), hydraulic constant pressure system (6), pressure transducer (1), displacement transducer (7) and computer data processing system (8), it is characterized in that:
Described test board (4) is used to place tested lifting jack (2);
Described hydraulic constant pressure system (6) is arranged on the top of described test board (4), provides constant compression force to act on lifting jack in the stroke of lifting jack;
The hydraulic constant pressure system (6) that is arranged on described pressure transducer (1) goes up and over against described test board (4), gathers the actual pressure data that lifting jack is born in stroke;
The described hydraulic constant pressure system (6) that is arranged on described displacement transducer (7) go up and with its interlock, the travel position data of gathering lifting jack;
Described computer data processing system (8) electrically connects with described pressure transducer (1) and displacement transducer (7), and the result is handled and exported to the pressure data and the travel position data that collect.
2, load dynamic pretest system for hoisting jack as claimed in claim 1 is characterized in that described test board (4) is provided with safety guard net on every side.
3, the dynamically pre-method for testing of lifting jack load is characterized in that carrying out according to the following steps: tested lifting jack (2) is placed on the test board (4), and sets required test pressure on computer data processing system (8); Open hydraulic constant pressure system (6), hydraulic constant pressure system (6) moves to pressure transducer (1) top of lifting jack (2) automatically, then lifting jack (2) is applied pressure to required value; Lifting jack (2) is ejected; Under different strokes, hydraulic constant pressure system (6) keeps constant compression force automatically, up to end of test (EOT); Computer data processing system (8) will be handled from the pressure data and the travel position data of pressure transducer (1) and displacement transducer (7), write down the pressure of lifting jack in whole elevation process and the variation of stroke automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100960880A CN101476992A (en) | 2009-02-09 | 2009-02-09 | Load dynamic pretest system for hoisting jack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100960880A CN101476992A (en) | 2009-02-09 | 2009-02-09 | Load dynamic pretest system for hoisting jack |
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| CN101476992A true CN101476992A (en) | 2009-07-08 |
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| CNA2009100960880A Pending CN101476992A (en) | 2009-02-09 | 2009-02-09 | Load dynamic pretest system for hoisting jack |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829986A (en) * | 2011-06-17 | 2012-12-19 | 南京梅山冶金发展有限公司 | Jack detection device |
| CN103033384A (en) * | 2012-12-21 | 2013-04-10 | 佛山市质量计量监督检测中心 | Smart lifting jack verification indication device based on embedded platform and verification method thereof |
| CN106500898A (en) * | 2017-01-13 | 2017-03-15 | 岳阳市永金起重永磁铁有限公司 | A kind of top-opening type detects the method and device of magnetic force crane gear pulling-out force |
| CN109668749A (en) * | 2018-12-29 | 2019-04-23 | 莱茵技术（上海）有限公司 | It is a kind of to decline the equipment for following test for jack |
| CN110220729A (en) * | 2019-06-12 | 2019-09-10 | 安徽通润汽车零部件有限公司 | The very heavy very useful decline of one kind follows test device |
| CN113820112A (en) * | 2021-09-16 | 2021-12-21 | 常州格林电力机械制造有限公司 | Performance test method of valve pin type bolt stretching leveling device |
-
2009
- 2009-02-09 CN CNA2009100960880A patent/CN101476992A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102829986A (en) * | 2011-06-17 | 2012-12-19 | 南京梅山冶金发展有限公司 | Jack detection device |
| CN103033384A (en) * | 2012-12-21 | 2013-04-10 | 佛山市质量计量监督检测中心 | Smart lifting jack verification indication device based on embedded platform and verification method thereof |
| CN103033384B (en) * | 2012-12-21 | 2015-10-21 | 佛山市质量计量监督检测中心 | A kind of calibration method of the intelligent lifting jack calibrating indicating device based on embedded platform |
| CN106500898A (en) * | 2017-01-13 | 2017-03-15 | 岳阳市永金起重永磁铁有限公司 | A kind of top-opening type detects the method and device of magnetic force crane gear pulling-out force |
| CN106500898B (en) * | 2017-01-13 | 2022-04-29 | 岳阳市永金起重永磁铁有限公司 | Method and device for detecting pulling-out force of magnetic hoisting equipment in top-open mode |
| CN109668749A (en) * | 2018-12-29 | 2019-04-23 | 莱茵技术（上海）有限公司 | It is a kind of to decline the equipment for following test for jack |
| CN110220729A (en) * | 2019-06-12 | 2019-09-10 | 安徽通润汽车零部件有限公司 | The very heavy very useful decline of one kind follows test device |
| CN113820112A (en) * | 2021-09-16 | 2021-12-21 | 常州格林电力机械制造有限公司 | Performance test method of valve pin type bolt stretching leveling device |
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Open date: 20090708 |