CN102607960B - Measurement and control system for hydraulic test - Google Patents
Measurement and control system for hydraulic test Download PDFInfo
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- CN102607960B CN102607960B CN 201210110588 CN201210110588A CN102607960B CN 102607960 B CN102607960 B CN 102607960B CN 201210110588 CN201210110588 CN 201210110588 CN 201210110588 A CN201210110588 A CN 201210110588A CN 102607960 B CN102607960 B CN 102607960B
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- 238000012360 testing method Methods 0.000 title claims abstract description 78
- 238000005259 measurement Methods 0.000 title abstract 6
- 239000007788 liquid Substances 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000004880 explosion Methods 0.000 claims description 7
- 230000008676 import Effects 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- CUZMQPZYCDIHQL-VCTVXEGHSA-L calcium;(2s)-1-[(2s)-3-[(2r)-2-(cyclohexanecarbonylamino)propanoyl]sulfanyl-2-methylpropanoyl]pyrrolidine-2-carboxylate Chemical compound [Ca+2].N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1.N([C@H](C)C(=O)SC[C@@H](C)C(=O)N1[C@@H](CCC1)C([O-])=O)C(=O)C1CCCCC1 CUZMQPZYCDIHQL-VCTVXEGHSA-L 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention relates to a measurement and control system for a hydraulic test. A system control part is composed of a PLC (programmable logic controller) control cabinet, an industrial personal computer and a printer, a PLC is included in the PLC control cabinet, and the industrial personal computer is used as an upper computer of the PLC and connected with the PLC via a communication cable; a measurement and control pipeline part comprises a gas source supply pipeline, a gas-driving booster pump A, a gas-driving booster pump B, a liquid source supply pipeline, a high hydraulic output pipeline and a liquid unloading pipeline; and the PLC outputs a current control signal to the output end of an electric proportional valve, and the electric proportional valve controls gas pressure and gas flow rate by adjusting the position of a gas inlet valve according to the current control signal and a gas pressure signal which is output in proportion. The measurement and control system can performvarious pressure tests including an intensity test, a burst test for a safety relief device of a container, and a test for the residual deformation rate of the container; automatic control and manualcontrol in the hydraulic test for a fire-fighting product are independent from each other and can be used independently; pressure-boosting speed is adjustable, pressure change and dynamic curve output are detected in time; the measurement and control system is high in pressure control accuracy, small in volume, light in weight and low in energy consumption; multi-level pressure-boosting can be realized; and the measurement and control system has the characteristics of being high in reliability, high in accuracy, easy in operation etc.
Description
Technical field
The present invention relates to the fire product inspection machine, particularly a kind of hydro-test TT﹠C system is used for realizing carrying out manually or automatically multiple hydro-test, explosion bulge test, rate of residual test and is a kind of equipment of purpose.
Background technology:
The hydro-test TT﹠C system is the development of decades at home, technology is ripe gradually, though the part key components still needs import, it is homemade that but some low Press fitting and corresponding software can be realized at present, in addition, because price factor, except the enterprise that possesses certain economic strength used this system, majority all adopted old-fashioned hydraulic pressure TT﹠C system.
Most of old-fashioned hydraulic pressure TT﹠C system exists following problem:
1, can not realize automatic control, need manually control; 2, rate of pressure rise can not be regulated automatically, all adopts same rate of pressure rise test at products of different specifications, does not meet the fire product standard-required; 3, volume is big, noise is big, energy consumption is high.
Summary of the invention
The present invention is directed to the deficiency of old-fashioned hydraulic pressure TT﹠C system, a kind of design proposal of fire product hydro-test TT﹠C system is provided, be used for overcoming the deficiency that prior art exists, realize the automatic controlling level of hydro-test, explosion bulge test, rate of residual test.
The present invention realizes by such technical scheme: hydro-test TT﹠C system, its sign are, comprise that systems control division divides and the observing and controlling pipeline portions;
Described systems control division divides and is made up of PLC switch board, industrial computer and printer, comprises PLC in the PLC switch board, and industrial computer connects by telecommunication cable between them as the host computer of PLC;
Electric Proportion valve, solenoid directional control valve A, solenoid directional control valve B and pressure transducer are installed in respectively on the observing and controlling pipeline;
PLC connects pressure transducer by its analog quantity input port, gathers line pressure signal;
PLC connects the electric Proportion valve control end by its analog quantity output port; The output current control signal;
PLC connects solenoid directional control valve A, solenoid directional control valve B by its digital quantity output port; Output digital switch signal;
Described observing and controlling pipeline portions comprises source of the gas supply line, gas drive supercharge pump A, gas drive supercharge pump B, liquid source supply line, high hydraulic pressure output pipe and liquid off-load pipeline;
Described source of the gas supply line comprises from source of the gas to gas drive supercharge pump A intake interface and one section pipeline of gas drive supercharge pump B intake interface, and air strainer, electric Proportion valve, manual three-way valve, driving rain glass, oil sprayer and solenoid directional control valve A are installed on this pipeline successively;
Branch road in parallel between filtrator and the manual three-way valve is installed a driving pressure regulator valve, the gas outlet of filtrator on the branch road
Connect the air intake opening that drives pressure regulator valve, the gas outlet that drives pressure regulator valve connects an interface of manual three-way valve;
Two interfaces of giving vent to anger of solenoid directional control valve A connect the intake interface of gas drive supercharge pump A and the intake interface of gas drive supercharge pump B respectively; By the control of the PLC in PLC switch board solenoid directional control valve A, switch the gas flow outlet, determine that gas enters gas drive supercharge pump A or enters gas drive supercharge pump B;
PLC in the PLC switch board is to electric Proportion valve control end output current control signal, and electric Proportion valve is then according to current controling signal, and Shu Chu air pressure signal is controlled air pressure and gas flow by adjusting the air inlet valve position in proportion;
Described liquid source supply line comprises from the liquid source installs water tank and filtrator successively to one section pipeline of gas drive supercharge pump A feed liquor interface and gas drive supercharge pump B feed liquor interface on this pipeline; The interface in liquid source connects the water tank import, and the water tank outlet connects filter inlet, and filter outlet connects gas drive supercharge pump A feed liquor interface and gas drive supercharge pump B feed liquor interface;
Described high hydraulic pressure output pipe comprises from gas drive supercharge pump A and goes out the pipeline that liquid interface and gas drive supercharge pump B fluid are interfaced to test lead;
The drain pipe of gas drive supercharge pump A drain pipe and gas drive supercharge pump B is incorporated on the person in charge after being attempted by same node;
Gas drive supercharge pump A drain pipe to and connect blowout-back pressure gauge be installed between the node;
Gas drive supercharge pump B(131) drain pipe to and connect retaining valve be installed between the node;
The person in charge of high hydraulic pressure output pipe goes up setting pressure sensors A, some test stop valves and corresponding some high pressure delivery outlets with it;
Test stop valve A connects high pressure delivery outlet A, on the pipeline between test stop valve A and the high pressure delivery outlet A accumulator, safety overflow valve and pressure transducer B is installed;
Test stop valve B connects high pressure delivery outlet B;
The test shutoff valve C connects high pressure delivery outlet C;
Test stop valve D connects high pressure delivery outlet D;
Test stop valve E connects high pressure delivery outlet E, and high pressure delivery outlet E connects Steel Tube Special, connects container to be tried by Steel Tube Special, and container to be tried is seated in the explosion-proof tank water jacket;
Comprise water jacket vent valve, bleed valve, explosion bolt, water intaking valve and liquid source interface on the explosion-proof tank water jacket;
The delivery pipe mouth of pipe underlying that is connected with bleed valve is cup high-volume, and measuring cup is seated on the Precision Electronics Balance;
High hydraulic pressure output pipe is responsible for and is connected liquid off-load pipeline;
Described liquid off-load pipeline comprises that liquid off-load pipeline is installed pressure regulator valve, unloader, solenoid directional control valve B, Pneumatic valve and unloader successively from the pipeline between the paramount hydraulic pressure output pipe person in charge of the filter outlet of source of the gas supply line;
Solenoid directional control valve B is subjected to the control of PLC in the PLC switch board that systems control division divides;
The step that the hydro-test TT﹠C system is tested comprises:
A) at first container to be tried is installed on the interface of associated Steel Tube Special in the explosion-proof tank water jacket;
B) regulate corresponding test stop valve then, guarantee to test pipeline and be in unimpeded state, other not test (N.T.) pipeline is in closed condition;
C) open the hydro-test TT﹠C system: open liquid source and source of the gas, bleed pressure is set at hydraulic pressure TT﹠C system working pressure;
D) preestablish the safety relief device test pressure, make the supercharging simultaneously of two gas drive supercharge pumps, and set the switching pressure of two gas drive supercharge pumps; When reaching the switching force value, cutting off low-lift pump under PLC control is gas drive supercharge pump B, and B is out of service for source of the gas gas drive supercharge pump; High-pressure pump is that gas drive supercharge pump A continues operation, regulates electric Proportion valve by PLC, and the output pressure signal is adjusted the air inlet valve position in proportion, control air pressure and gas flow;
E) by industrial computer set the gas drive supercharge pump the startup original pressure, set rate of pressure rise, set time parameter, the pressure parameter of display interface, after parameter configures, preserve the parameter setting, confirm that the back start-up system tests.
Reinstall test specimen after the test and carry out test next time.
The invention has the beneficial effects as follows: owing to adopted this hydro-test TT﹠C system technical scheme, realized to carry out multiple pressure test: strength test, vessel safety bleeder explosion test and the test of container rate of residual; Automatic (manually) control in the fire product hydro-test, the two is independent mutually, can use separately; Rate of pressure rise is adjustable, and detected pressures changes in real time, performance graph output; Pressure control precision height, volume is little, in light weight, noise is little, energy consumption is little; Can carry out multistage pressurization; Computer shows test process and printing test result; Have high reliability, high precision, characteristics such as easy to operate.
Description of drawings
Fig. 1 is structural drawing of the present invention;
Among the figure: 1. liquid source, 2. source of the gas, 3. air strainer, 4. electric Proportion valve, 5. driving pressure regulator valve, 6. manual three-way valve 7. drives rain glass, 8. oil sprayer, 9. solenoid directional control valve A, 10. PLC switch board, 11. industrial computers, 12. printers, 13. gas drive supercharge pump A, 131. gas drive supercharge pump B, 14. blowout-back pressure gauges, 15. retaining valves, 16. pressure transducer A, 17. Pneumatic valves, 18. unloaders, 19. test stop valve A, 20. accumulator, 21. safety overflow valves, 22. high pressure delivery outlet A, 23. pressure transducer B, 24. test stop valve B, 25. high pressure delivery outlet B, 26. the test shutoff valve C, 27. high pressure delivery outlet C, 28. test stop valve D, 29. high pressure delivery outlet D, 30. test stop valve E, 31. high pressure delivery outlet E, 32. Steel Tube Special, 33. water jacket vent valves, 34. measuring cups, 35. Precision Electronics Balance, 36. bleed valves, 37. explosion-proof tank water jackets, 38. the explosion bolt, 39. containers to be tried, 40. water intaking valves, 41. the liquid source interface, 42. solenoid directional control valve B, 43. filtrators, 44. unloader, 45. water tanks, 46. pressure regulator valves.
Embodiment
For a more clear understanding of the present invention, describe in detail in conjunction with the accompanying drawings and embodiments:
As shown in Figure 1, a kind of hydro-test TT﹠C system comprises that systems control division divides and the observing and controlling pipeline portions; Systems control division divides and is made up of PLC switch board 10, industrial computer 11 and printer 12, comprises PLC in the PLC switch board 10, and industrial computer 11 connects by telecommunication cable between them as the host computer of PLC;
Electric Proportion valve 4, solenoid directional control valve A9, solenoid directional control valve B42 and pressure transducer 16 are installed in respectively on the observing and controlling pipeline;
PLC connects pressure transducer 16 by its analog quantity input port, gathers line pressure signal;
PLC connects electric Proportion valve 4 control ends by its analog quantity output port; The output current control signal;
PLC connects solenoid directional control valve A9, solenoid directional control valve B42 by its digital quantity output port; Output digital switch signal;
Electric Proportion valve 4, solenoid directional control valve A9, solenoid directional control valve B42 and pressure transducer 16 are installed in respectively on the observing and controlling pipeline;
The observing and controlling pipeline portions comprises source of the gas supply line, gas drive supercharge pump A13, gas drive supercharge pump B131, liquid source supply line, high hydraulic pressure output pipe and liquid off-load pipeline;
The source of the gas supply line comprises from source of the gas 2 to gas drive supercharge pump A13 intake interface and one section pipeline of gas drive supercharge pump B131 intake interface, air strainer 3, electric Proportion valve 4, manual three-way valve 6 is installed on this pipeline successively, is driven rain glass 7, oil sprayer 8 and solenoid directional control valve A9;
Branch road in parallel between filtrator 3 and the manual three-way valve 6 is installed a driving pressure regulator valve 5 on the branch road, the gas outlet of filtrator 3 connects the air intake opening that drives pressure regulator valve 5, drive pressure regulator valve 5 the gas outlet connect an interface of manual three-way valve 6;
Two interfaces of giving vent to anger of solenoid directional control valve A9 connect the intake interface of gas drive supercharge pump A13 and the intake interface of gas drive supercharge pump B131 respectively; By the control of the PLC in the PLC switch board 10 solenoid directional control valve A9, switch the gas flow outlet, determine that gas enters gas drive supercharge pump A13 or enters gas drive supercharge pump B131;
PLC in the PLC switch board 10 is to electric Proportion valve 4 control end output current control signals, and 4 of electric Proportion valves are according to current controling signal, and Shu Chu air pressure signal is controlled air pressure and gas flow by adjusting the air inlet valve position in proportion;
Liquid source supply line comprises the one section pipeline that is interfaced to gas drive supercharge pump A13 feed liquor interface and gas drive supercharge pump B131 feed liquor interface from liquid source 1, and water tank 45 and filtrator 43 are installed on this pipeline successively; The liquid source interface connects water tank 45 imports, and water tank 45 outlets connect filtrator 43 imports, and filtrator 43 outlets connect gas drive supercharge pump A13 feed liquor interface and gas drive supercharge pump B131 feed liquor interface;
High hydraulic pressure output pipe comprises from gas drive supercharge pump A13 and goes out the pipeline that liquid interface and gas drive supercharge pump B131 fluid are interfaced to test lead;
The drain pipe of gas drive supercharge pump A13 drain pipe and gas drive supercharge pump B131 is incorporated on the person in charge after being attempted by same node;
Gas drive supercharge pump A13 drain pipe to and connect between the node blowout-back pressure gauge 14 be installed;
Gas drive supercharge pump B131 drain pipe to and connect between the node retaining valve 15 be installed;
High hydraulic pressure output pipe is responsible for and is gone up setting pressure sensors A 16, some test stop valves and corresponding some high pressure delivery outlets with it;
Test stop valve A19 connects high pressure delivery outlet A22, and accumulator 20, safety overflow valve 21 and pressure transducer B23 are installed on the pipeline between test stop valve A19 and the high pressure delivery outlet A22;
Test stop valve B24 connects high pressure delivery outlet B25;
Test shutoff valve C 26 connects high pressure delivery outlet C27;
Test stop valve D28 connects high pressure delivery outlet D29;
Test stop valve E30 connects high pressure delivery outlet E31, and high pressure delivery outlet E31 connects Steel Tube Special 32, connects by Steel Tube Special 32 and waits to try container 39, waits to try container 39 and is seated in the explosion-proof tank water jacket 37;
Comprise water jacket vent valve 33, bleed valve 36, explosion bolt 38, water intaking valve 40 and liquid source interface 41 on the explosion-proof tank water jacket 37;
The delivery pipe mouth of pipe underlying that is connected with bleed valve 36 is cup 34 high-volume, and measuring cup 34 is seated on the Precision Electronics Balance 35;
High hydraulic pressure output pipe is responsible for and is connected liquid off-load pipeline;
Liquid off-load pipeline comprises from the pipeline between the paramount hydraulic pressure output pipe person in charge of filtrator 3 outlets of source of the gas supply line, pressure regulator valve 46, unloader 44, solenoid directional control valve B42, Pneumatic valve 17 and unloader 18 is installed on the liquid off-load pipeline successively;
Solenoid directional control valve B42 is subjected to the control of PLC in the PLC switch board 10 that systems control division divides;
When testing, at first will wait to try on the interface that container 39 is installed in associated Steel Tube Specials 32 in the explosion-proof tank water jacket 37;
Regulate corresponding test stop valve then, guarantee to test pipeline and be in unimpeded state, other not test (N.T.) pipeline is in closed condition;
Open the hydro-test TT﹠C system: open liquid source 1 and source of the gas 2, source of the gas 2 pressure are set at hydraulic pressure TT﹠C system working pressure;
Preestablish the safety relief device test pressure, make the supercharging simultaneously of two gas drive supercharge pumps, and set the switching pressure of two gas drive supercharge pumps;
When reaching the switching force value, cutting off low-lift pump under PLC control is gas drive supercharge pump B131, and B131 is out of service for source of the gas gas drive supercharge pump; High-pressure pump is that gas drive supercharge pump A13 continues operation, regulates electric Proportion valve 4 by PLC, and the output pressure signal is adjusted the air inlet valve position in proportion, control air pressure and gas flow;
By industrial computer 11 set the gas drive supercharge pumps the startup original pressure, set rate of pressure rise, set time parameter, the pressure parameter of display interface, after parameter configures, preserve the parameter setting, confirm that the back start-up system tests; Reinstall test specimen after the test and carry out test next time.
The above; only be the preferable embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
According to the above description, can realize the solution of the present invention in conjunction with art technology.
Claims (1)
1. hydro-test TT﹠C system is characterized in that, comprises that systems control division divides and the observing and controlling pipeline portions;
Described systems control division divides and is made up of PLC switch board (10), industrial computer (11) and printer (12), and the PLC switch board comprises PLC in (10), and industrial computer (11) connects by telecommunication cable between them as the host computer of PLC;
Electric Proportion valve (4), solenoid directional control valve A(9), solenoid directional control valve B(42) and pressure transducer A(16) be installed in respectively on the observing and controlling pipeline;
PLC connects pressure transducer A(16 by its analog quantity input port), gather line pressure signal;
PLC connects electric Proportion valve (4) control end by its analog quantity output port; The output current control signal;
PLC connects solenoid directional control valve A(9 by its digital quantity output port), solenoid directional control valve B(42); Output digital switch signal;
Described observing and controlling pipeline portions comprises source of the gas supply line, gas drive supercharge pump A(13), gas drive supercharge pump B(131), liquid source supply line, high hydraulic pressure output pipe and liquid off-load pipeline;
Described source of the gas supply line comprises from source of the gas (2) to gas drive supercharge pump A(13) intake interface and gas drive supercharge pump B(131) one section pipeline of intake interface, air strainer (3), electric Proportion valve (4), manual three-way valve (6) are installed on this pipeline successively, are driven rain glass (7), oil sprayer (8) and solenoid directional control valve A(9);
Branch road in parallel between air strainer (3) and the manual three-way valve (6), a driving pressure regulator valve (5) is installed on the branch road, the gas outlet of air strainer (3) connects the air intake opening that drives pressure regulator valve (5), and the gas outlet that drives pressure regulator valve (5) connects an interface of manual three-way valve (6);
Solenoid directional control valve A(9) two interfaces of giving vent to anger connect gas drive supercharge pump A(13 respectively) intake interface and gas drive supercharge pump B(131) intake interface; By the control of the PLC in the PLC switch board (10) solenoid directional control valve A(9), switch the gas flow outlet, determine that gas enters gas drive supercharge pump A(13) or enter gas drive supercharge pump B(131);
PLC in the PLC switch board (10) is to electric Proportion valve (4) control end output current control signal, and electric Proportion valve (4) is then according to current controling signal, and Shu Chu air pressure signal is controlled air pressure and gas flow by adjusting the air inlet valve position in proportion;
Described liquid source supply line comprises from liquid source (1) to gas drive supercharge pump A(13) feed liquor interface and gas drive supercharge pump B(131) one section pipeline of feed liquor interface, water tank (45) and filtrator (43) are installed on this pipeline successively; The interface in liquid source (1) connects water tank (45) import, and water tank (45) outlet connects filtrator (43) import, and filtrator (43) outlet connects gas drive supercharge pump A(13) feed liquor interface and gas drive supercharge pump B(131) the feed liquor interface;
Described high hydraulic pressure output pipe comprises from gas drive supercharge pump A(13) go out liquid interface and gas drive supercharge pump B(131) fluid is interfaced to the pipeline of test lead;
Gas drive supercharge pump A(13) drain pipe and gas drive supercharge pump B(131) drain pipe be incorporated on the person in charge after being attempted by same node;
Gas drive supercharge pump A(13) drain pipe to and connect blowout-back pressure gauge (14) be installed between the node;
Gas drive supercharge pump B(131) drain pipe to and connect retaining valve (15) be installed between the node;
The person in charge of high hydraulic pressure output pipe goes up setting pressure sensors A (16), some test stop valves and corresponding some high pressure delivery outlets with it;
Test stop valve A(19) connect high pressure delivery outlet A(22), test stop valve A(19) and high pressure delivery outlet A(22) between pipeline on accumulator (20), safety overflow valve (21) and pressure transducer B(23 are installed);
Test stop valve B(24) connects high pressure delivery outlet B(25);
Test shutoff valve C (26) connects high pressure delivery outlet C(27);
Test stop valve D(28) connects high pressure delivery outlet D(29);
Test stop valve E(30) connect high pressure delivery outlet E(31), high pressure delivery outlet E(31) connect Steel Tube Special (32), connect container to be tried (39) by Steel Tube Special (32), container to be tried (39) is seated in the explosion-proof tank water jacket (37);
Comprise water jacket vent valve (33), bleed valve (36), explosion bolt (38), water intaking valve (40) and liquid source interface (41) on the explosion-proof tank water jacket (37);
The delivery pipe mouth of pipe underlying that is connected with bleed valve (36) is cup (34) high-volume, and measuring cup (34) is seated on the Precision Electronics Balance (35);
High hydraulic pressure output pipe is responsible for and is connected liquid off-load pipeline;
Described liquid off-load pipeline comprises the pipeline between being responsible for from the paramount hydraulic pressure output pipe of the air strainer (3) of source of the gas supply line outlet, and liquid off-load pipeline is installed pressure regulator valve (46), unloader (44), solenoid directional control valve B(42 successively), Pneumatic valve (17) and unloader (18);
Solenoid directional control valve B(42) is subjected to the control of PLC in the PLC switch board (10) that systems control division divides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210110588 CN102607960B (en) | 2012-04-16 | 2012-04-16 | Measurement and control system for hydraulic test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201210110588 CN102607960B (en) | 2012-04-16 | 2012-04-16 | Measurement and control system for hydraulic test |
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| CN102607960A CN102607960A (en) | 2012-07-25 |
| CN102607960B true CN102607960B (en) | 2013-10-02 |
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| CN 201210110588 Expired - Fee Related CN102607960B (en) | 2012-04-16 | 2012-04-16 | Measurement and control system for hydraulic test |
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2012
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323180A (en) * | 2007-06-11 | 2008-12-17 | 天津北通工贸有限公司 | Hydraulic press control system based on PLC |
| CN201548837U (en) * | 2009-09-28 | 2010-08-11 | 浙江雷博司电器有限公司 | Hydraulic press control system based on PLC |
| CN202554795U (en) * | 2012-04-16 | 2012-11-28 | 公安部天津消防研究所 | Test-control system for hydraulic test |
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Address after: No. 110 Wei Jinnan Road, Nankai District, Tianjin Patentee after: TIANJIN FIRE Research Institute OF MEM Address before: 300 382 No. 110 Weijin South Road, Nankai District, Tianjin Patentee before: TIANJIN FIRE Research Institute |
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