CN203500178U - Hydraulic system for large-flow-rate hydraulic-control check valve test bed - Google Patents
Hydraulic system for large-flow-rate hydraulic-control check valve test bed Download PDFInfo
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- CN203500178U CN203500178U CN201320540040.6U CN201320540040U CN203500178U CN 203500178 U CN203500178 U CN 203500178U CN 201320540040 U CN201320540040 U CN 201320540040U CN 203500178 U CN203500178 U CN 203500178U
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- check valve
- valve
- pilot operated
- hydraulic
- operated check
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Abstract
The utility model discloses a hydraulic system for a large-flow-rate hydraulic-control check valve test bed. The hydraulic system comprises a hydraulic pump unit, a working oil cylinder and a hydraulic-control check valve, wherein a reversing valve 3 is connected with a reversing valve 1 in parallel on a pipeline between a rodless cavity of the working oil cylinder and an outlet of the hydraulic pump unit after being in serial connection with the hydraulic-control check valve, a pipeline between a rod cavity of the working oil cylinder and the outlet of the hydraulic pump unit is provided with a reversing valve 2, a hydraulic control port of the hydraulic-control check valve is communicated with the rod cavity of the working oil cylinder, external pipelines of the rod cavity and the rodless cavity of the working oil cylinder are respectively provided with a pressure sensor 1 and a pressure sensor 2, and an inlet pipeline of the hydraulic-control check valve is provided with a flow-rate sensor. The hydraulic system has the characteristics that the hydraulic system is suitable for measuring the performance of the large-flow-rate hydraulic-control check valve, by integrating the machine, electricity and liquid, the automation degree is high, the measurement precision is high, the sensitivity is good, the test performance is stable and reliable, the test process is stable, and the service life of the system is long.
Description
Technical field
The utility model belongs to hydraulics field, relates to a kind of hydraulic test system, is specifically related to a kind of large flow pilot operated check valve test stand hydraulic system.
Background technique
Comprehensive mechanical coal mining technology is efficient, safe coal-mining method.From 1954 Nian Britain, be born first fully mechanized mining face, combined the technology of adopting just constantly developed and perfect, be worldwide widely used, become the direction of coal industry technical development.The constituent element of complete fully-mechanized mining equipment is broadly divided into support apparatus, coal excavation apparatus and haulage device.Hydraulic support is one of key equipment of support apparatus, accounts for 70% of fully mechanized coal face investment.During coal mining, numerous hydraulic supports are arranged in a row, and according to the length of mining face under mine, a fully mechanized mining face approximately needs 100 to 150 left and right of support.
Due to the requirement of burn-proof and explosion prevention under mine, in hydraulic pressure system of hydraulic support, the medium general choice of transmission of pressure is high-water-based emulsion.By emulsified liquid, in the pipeline of a fixed structure and the system of control unit composition, flow, realize transmission and the conversion of energy.Control valve, safety valve and Pilot operated check valve coal winning technology in accordance with regulations requires to realize the action of each step, to meet the needs of mechanical coal mining.Hydraulic support not only maintains certain working space when normal work, and when running into the burst accidents such as roof fall, can also play the important function of protection staff and device security
Pilot operated check valve is one of hydraulic support major control adjusting part.In the process rising at hydraulic support, Pilot operated check valve forward is opened, and the high-water-based emulsion with certain pressure rises hydraulic support by Pilot operated check valve.When hydraulic support is normally worked, Pilot operated check valve plays reverse cut-off effect, the pressure of keeping system.When hydraulic support declines, Pilot operated check valve reverse opening, flows out the high-water-based emulsion in system in a large number and fast, realizes the unloading of system.According to the functional requirement of hydraulic bracket system, the characteristic such as Pilot operated check valve should have little, the reverse good airproof performance of forward cracking pressure in hydraulic bracket system, compression shock is little while oppositely opening, noise is little.And while declining due to hydraulic support, the emulsified liquid of oil hydraulic cylinder inner high voltage is at short notice by Pilot operated check valve off-load, through-current capacity can reach 480L/min, in this process, system tends to produce impact shock, therefore at hydraulic support, realize in the process of action, the dynamic performance that Pilot operated check valve is good is very important.For improving the dynamic performance of optimizing hydraulic support Pilot operated check valve, researchers have done various improvement to hydraulic support Pilot operated check valve, but due to the large flow of hydraulic support Pilot operated check valve, for the feature of hyperbaric environment, conventional common Pilot operated check valve test system can not well be simulated its environment when hydraulic support moves, and has affected the test result of dynamic performance.
Model utility content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of large flow pilot operated check valve test stand hydraulic system is provided, it is suitable for the measurement of large flow pilot operated check valve performance, adopt mechanical, electrical, liquid integrated design, automaticity is high, measuring accuracy is high, sensitivity good, test performance is reliable and stable, and test process is steady, system long service life.
For achieving the above object, the technical solution adopted in the utility model is: a kind of large flow pilot operated check valve test stand hydraulic system, the system of being included as provides the oil hydraulic pump group of high-pressure emulsion, drive the operating cylinder of load movement, for the Pilot operated check valve tested and for system, provide the selector valve one of jump signal, selector valve two and selector valve three, it is characterized in that: described selector valve three and described Pilot operated check valve are connected afterwards and described selector valve one is connected in parallel on the pipeline between described operating cylinder rodless cavity and the outlet of described oil hydraulic pump group, on pipeline between described operating cylinder rod chamber and the outlet of described oil hydraulic pump group, be provided with described selector valve two, the hydraulic control mouth of described Pilot operated check valve is communicated with described operating cylinder rod chamber, on the external pipe of described operating cylinder rod chamber and rodless cavity, be respectively arranged with pressure transducer one and pressure transducer two, on described Pilot operated check valve inlet pipe, be provided with flow transducer.
Above-mentioned large flow pilot operated check valve test stand hydraulic system, it is characterized in that: described oil hydraulic pump group comprises a plurality of oil hydraulic pumps, on pipeline described in each between oil hydraulic pump entrance and fuel tank, be all disposed with stop valve and oil purifier, described in each, on the outlet conduit of oil hydraulic pump, be provided with one-way valve and pilot operated compound relief valve.
Above-mentioned large flow pilot operated check valve test stand hydraulic system, is characterized in that: described selector valve one is two two electric change valves, and described selector valve two and described selector valve three are two position, three-way electromagnetic change valve.
Above-mentioned large flow pilot operated check valve test stand hydraulic system, is characterized in that: described pressure transducer one and described pressure transducer two are thin-film pressure sensor, described flow transducer is photoelectric flow rate transducer.
Above-mentioned large flow pilot operated check valve test stand hydraulic system, is characterized in that: on the pipeline between described one-way valve and described pilot operated compound relief valve, be provided with pressure gauge.
The utility model compared with prior art has the following advantages:
(1) this large flow pilot operated check valve test stand, with being provided with pump group in hydraulic system, opens oil hydraulic pumps different in pump group, can survey the performance of Pilot operated check valve under different flows, is suitable for the measurement of large flow pilot operated check valve performance.
(2) hydraulic system adopts mechanical, electrical, liquid integrated design for this large flow pilot operated check valve test stand, and working procedure can control system automatic operation, and automaticity is very high.
(3) this large flow pilot operated check valve test stand adopts DG1300-BZ-A-2-50 type thin-film pressure sensor and photoelectric flow rate transducer by hydraulic system, thereby its measuring accuracy is high, sensitivity good, test performance is reliable and stable.
(4) this large flow pilot operated check valve test stand is steady with hydraulic system test process, system long service life.
Below by drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Description of reference numerals:
1-fuel tank; 2-oil purifier; 3-stop valve;
4-oil hydraulic pump; 5-selector valve two; 6-selector valve one;
7-operating cylinder; 8-load; 9-pressure transducer one;
10-pressure transducer two; 11-Pilot operated check valve; 12-flow transducer;
13-selector valve three; 14-one-way valve; 15-pressure gauge;
16-pilot operated compound relief valve.
Embodiment
A kind of large flow pilot operated check valve test stand hydraulic system as shown in Figure 1, the system of being included as provides the oil hydraulic pump group of high-pressure emulsion, operating cylinder 7 with dynamic load 8 motions, for the Pilot operated check valve 11 tested and for system, provide the selector valve 1 of jump signal, selector valve 25 and selector valve 3 13, described selector valve 3 13 and described Pilot operated check valve 11 are connected afterwards and described selector valve 1 is connected in parallel on the pipeline between described operating cylinder 7 rodless cavities and the outlet of described oil hydraulic pump group, on pipeline between described operating cylinder 7 rod chambers and the outlet of described oil hydraulic pump group, be provided with described selector valve 25, the hydraulic control mouth of described Pilot operated check valve 11 is communicated with described operating cylinder 7 rod chambers, on the external pipe of described operating cylinder 7 rod chambers and rodless cavity, be respectively arranged with pressure transducer 1 and pressure transducer 2 10, described pressure transducer 1 and described pressure transducer 2 10 are DG1300-BZ-A-2-50 type thin-film pressure sensor.On described Pilot operated check valve 11 inlet pipes, be provided with flow transducer 12, described flow transducer 12 is photoelectric flow rate transducer.
As shown in Figure 1, described oil hydraulic pump group comprises a plurality of oil hydraulic pumps 4, on pipeline described in each between oil hydraulic pump 4 entrances and fuel tank 1, be all disposed with stop valve 3 and oil purifier 2, described in each, on the outlet conduit of oil hydraulic pump 4, be provided with one-way valve 14 and pilot operated compound relief valve 16.
As shown in Figure 1, described selector valve 1 is two two electric change valves, and described selector valve 25 and described selector valve 3 13 are two position, three-way electromagnetic change valve.
As shown in Figure 1, on the pipeline between described one-way valve 14 and described pilot operated compound relief valve 16, be provided with pressure gauge 15.
The large flow pilot operated check valve test stand of the utility model by the working procedure of hydraulic system is: as shown in Figure 1, regulator solution press pump group makes it export suitable flow.When the right position of selector valve 1, the left position of selector valve 25 and 3 13 right connecting systems of selector valve, high-pressure emulsion enters operating cylinder 7 rodless cavities by the right position of selector valve 3 13 and the right bit stream of selector valve 1, when the pressure in operating cylinder 7 rodless cavities is greater than the weight of pressure in operating cylinder 7 rod chambers and load 8, emulsified liquid in operating cylinder 7 rod chambers is entered in fuel tank 1 by the left bit stream of selector valve 25, now load 8, by operating cylinder 7 jack-up upwards, can obtain corresponding test result by pressure transducer 1, pressure transducer 2 10 and flow transducer 12.
When the left position of selector valve 1, the left position of selector valve 25 and 3 13 left connecting systems of selector valve, now Pilot operated check valve 11 is closed, system is in packing state, now can make oil hydraulic pump group quit work, operating cylinder 7 load-supportings 8 keep static, can obtain corresponding test result by pressure transducer 1, pressure transducer 2 10 and flow transducer 12.
When the left position of selector valve 1, the right position of selector valve 25 and 3 13 left connecting systems of selector valve, high-pressure emulsion enters operating cylinder 7 rod chambers by the right bit stream of selector valve 25, now the hydraulic control mouth of Pilot operated check valve 11 is communicated with oil hydraulic pump group, when the pressure of the hydraulic control mouth of Pilot operated check valve 11 is increased to can promote control piston and small valve core time, Pilot operated check valve 11 is oppositely opened, emulsified liquid in operating cylinder 7 rodless cavities enters in fuel tank 1 through Pilot operated check valve 11 and the left bit stream of selector valve 3 13, load 8 moves downward with operating cylinder 7, can be by pressure transducer 1, pressure transducer 2 10 and flow transducer 12 obtain corresponding test result.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every any simple modification, change and equivalent structure transformation of above embodiment being done according to the utility model technical spirit, all still belongs in the protection domain of technical solutions of the utility model.
Claims (5)
1. a large flow pilot operated check valve test stand hydraulic system, the system of being included as provides the oil hydraulic pump group of high-pressure emulsion, the operating cylinder (7) of band dynamic load (8) motion, for the Pilot operated check valve (11) tested and for system, provide the selector valve one (6) of jump signal, selector valve two (5) and selector valve three (13), it is characterized in that: described selector valve three (13) and described Pilot operated check valve (11) are connected afterwards and described selector valve one (6) is connected in parallel on the pipeline between described operating cylinder (7) rodless cavity and the outlet of described oil hydraulic pump group, on pipeline between described operating cylinder (7) rod chamber and the outlet of described oil hydraulic pump group, be provided with described selector valve two (5), the hydraulic control mouth of described Pilot operated check valve (11) is communicated with described operating cylinder (7) rod chamber, on the external pipe of described operating cylinder (7) rod chamber and rodless cavity, be respectively arranged with pressure transducer one (9) and pressure transducer two (10), on described Pilot operated check valve (11) inlet pipe, be provided with flow transducer (12).
2. according to large flow pilot operated check valve test stand hydraulic system claimed in claim 1, it is characterized in that: described oil hydraulic pump group comprises a plurality of oil hydraulic pumps (4), on pipeline between (4) entrance of oil hydraulic pump described in each and fuel tank (1), be all disposed with stop valve (3) and oil purifier (2), on the outlet conduit of oil hydraulic pump described in each (4), be provided with one-way valve (14) and pilot operated compound relief valve (16).
3. according to large flow pilot operated check valve test stand hydraulic system claimed in claim 1, it is characterized in that: described selector valve one (6) is two two electric change valves, described selector valve two (5) and described selector valve three (13) are two position, three-way electromagnetic change valve.
4. according to large flow pilot operated check valve test stand hydraulic system claimed in claim 1, it is characterized in that: described pressure transducer one (9) and described pressure transducer two (10) are thin-film pressure sensor, and described flow transducer (12) is photoelectric flow rate transducer.
5. according to large flow pilot operated check valve test stand hydraulic system claimed in claim 2, it is characterized in that: on the pipeline between described one-way valve (14) and described pilot operated compound relief valve (16), be provided with pressure gauge (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540040.6U CN203500178U (en) | 2013-08-31 | 2013-08-31 | Hydraulic system for large-flow-rate hydraulic-control check valve test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320540040.6U CN203500178U (en) | 2013-08-31 | 2013-08-31 | Hydraulic system for large-flow-rate hydraulic-control check valve test bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203500178U true CN203500178U (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320540040.6U Expired - Fee Related CN203500178U (en) | 2013-08-31 | 2013-08-31 | Hydraulic system for large-flow-rate hydraulic-control check valve test bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203500178U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454748A (en) * | 2014-12-05 | 2015-03-25 | 宁波恒力液压股份有限公司 | Reliable comprehensive energy-saving hydraulic test device for gear pumps, overflow valves and one-way valves |
| CN105840584A (en) * | 2016-05-20 | 2016-08-10 | 四川长江液压天成机械有限公司 | Pump testing unit and testing method used for multi-tandem valve test bed |
| CN106228887A (en) * | 2016-08-04 | 2016-12-14 | 天地科技股份有限公司 | Roof timbering similarity simulation experiment system |
| CN111648949A (en) * | 2020-05-27 | 2020-09-11 | 中国煤炭科工集团太原研究院有限公司 | Emulsion pump and pump station testing system and method for realizing energy circulation |
-
2013
- 2013-08-31 CN CN201320540040.6U patent/CN203500178U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454748A (en) * | 2014-12-05 | 2015-03-25 | 宁波恒力液压股份有限公司 | Reliable comprehensive energy-saving hydraulic test device for gear pumps, overflow valves and one-way valves |
| CN104454748B (en) * | 2014-12-05 | 2017-01-25 | 宁波恒力液压股份有限公司 | Reliable comprehensive energy-saving hydraulic test device for gear pumps, overflow valves and one-way valves |
| CN105840584A (en) * | 2016-05-20 | 2016-08-10 | 四川长江液压天成机械有限公司 | Pump testing unit and testing method used for multi-tandem valve test bed |
| CN106228887A (en) * | 2016-08-04 | 2016-12-14 | 天地科技股份有限公司 | Roof timbering similarity simulation experiment system |
| CN111648949A (en) * | 2020-05-27 | 2020-09-11 | 中国煤炭科工集团太原研究院有限公司 | Emulsion pump and pump station testing system and method for realizing energy circulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20140831 |
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| EXPY | Termination of patent right or utility model |