CN2738287Y - Electrical control equipment of hydraulic headstock gear with correcting function - Google Patents
Electrical control equipment of hydraulic headstock gear with correcting function Download PDFInfo
- Publication number
- CN2738287Y CN2738287Y CN 200420027988 CN200420027988U CN2738287Y CN 2738287 Y CN2738287 Y CN 2738287Y CN 200420027988 CN200420027988 CN 200420027988 CN 200420027988 U CN200420027988 U CN 200420027988U CN 2738287 Y CN2738287 Y CN 2738287Y
- Authority
- CN
- China
- Prior art keywords
- interface module
- programmable controller
- controlled
- 24vdc
- controller circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 239000012208 gear oil Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 5
- 101000765037 Mus musculus Class E basic helix-loop-helix protein 40 Proteins 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101000713575 Homo sapiens Tubulin beta-3 chain Proteins 0.000 description 1
- 102100036790 Tubulin beta-3 chain Human genes 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Landscapes
- Programmable Controllers (AREA)
Abstract
The utility model relates to the electrical control equipment of a hydraulic headstock gear with correcting function. The structure of the electrical control equipment of a hydraulic headstock gear with correcting function is that the output end of the hydraulic headstock gear is connected with the input end of the control return circuit of the programmable controller; the output ends of a left anchor gate opening sensor and a right anchor gate opening sensor are respectively connected with the other two input ends of the control circuit of the programmable controller; the output end of an electric motor control return circuit is connected with the input end of the hydraulic headstock gear. The output end of the programmable controller control circuit is connected with the input end of the electric motor control return circuit; the other two output ends/input ends of the programmable controller control return circuit are respectively connected with the input ends/output ends of an anchor gate opening display and a communication interface. The advantages of the electrical control equipment of a hydraulic headstock gear with correcting function are that the utility model can automatically realize correcting control by respectively measuring the left anchor gate opening and the right anchor gate opening and adopting the programmable controller PLC mode. When the anchor gate ascends or descends, the output current signals of the analog quantity output module of the programmable controller are changed when the left and right openings generate errors, and then the utility model automatically regulates an electro-hydraulic proportional regulating valve to make the left and right openings keep consistent.
Description
Technical field
The utility model relates to a kind of electrical control equipment that is used for reservoir, power station hydraulic headstock gear keying gate.Belong to technical field of automation.
Background technology
The electrical control equipment of reservoir, gate of hydropower station hydraulic headstock gear, when adopting two bar hydraulic pressure to advance the gate opening/closing lifting, when left and right sides oil cylinder working-pressure was uneven, deflection took place in gate easily, conventional method is by the solenoid valve in the manual adjustments oil circuit, makes left and right sides oil cylinder working-pressure balance.This manual adjustment method is untimely, and efficient is not high, and is also dangerous.
Summary of the invention
The purpose of this utility model is the defective at above-mentioned existence, proposes a kind of hydraulic headstock gear electrical control equipment that adopts Programmable Logic Controller PLC mode to realize automatically and rectify a deviation and control.Technical solution of the present utility model: its structure is first input end in the output termination Controlled by Programmable Controller electricity loop of hydraulic headstock gear, left side gatage sensor, the output terminal of right gatage sensor connects second of Controlled by Programmable Controller circuit respectively, three input ends, the input end of the output termination hydraulic headstock gear in Motor Control loop, the input end in the output termination Motor Control loop of Controlled by Programmable Controller circuit is exported/is gone into end and connect the gatage display respectively for other two of Controlled by Programmable Controller electricity loop, the input of communication interface MODIBUS/go out to hold.Advantage of the present utility model: two gatage sensors are installed respectively on the hydraulic pressure pushing ram of the left and right sides, measure left gatage and right gatage, and adopt Programmable Logic Controller PLC mode to realize correction control automatically, when gate rises or descend, if left and right sides aperture produces deviation, the output current signal of the analog output module among the Programmable Logic Controller PLC changes, and regulates the electric-hydraulic proportion variable valve automatically, and left and right sides aperture is consistent.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model.
Fig. 2 is the circuit diagram in Motor Control loop, and wherein Fig. 2-1, Fig. 2-2 is respectively 1
#, 2
#The Motor Control loop circuit figure of motor, Fig. 2-the 3rd, the Motor Control loop circuit figure of accumulator motor.
Fig. 3 is the execution control circuit figure in the Controlled by Programmable Controller circuit.
Fig. 4 is the gatage sensor input circuit figure in the Controlled by Programmable Controller circuit.
Fig. 5 is knob input and solenoid valve output control circuit figure in the Controlled by Programmable Controller circuit.
Fig. 6 is headstock gear state-detection and the indicating circuit figure in the Controlled by Programmable Controller circuit.
Fig. 7 is the correction control circuit figure in the Controlled by Programmable Controller circuit.
Fig. 8 is the input/output interface module arrangement plan in the Controlled by Programmable Controller circuit.
Among the figure 1 " being hydraulic headstock gear, 2 " is that left gatage sensor, 3 " being right gatage sensor, 4 " is that Motor Control loop, 5 " being Controlled by Programmable Controller circuit, 6 " is the gatage display.
Embodiment
Contact point signals such as master controller input to Controlled by Programmable Controller circuit 5 ".Left and right sides gate jaw opening sensor output signal is sent into control circuit 5 ".Control circuit 5 " by Motor Control loop 3 " control electric-hydraulic proportion variable valve and oil pump motor start and stop." output left and right sides gate opening value, " numeral shows Controlled by Programmable Controller circuit 5 to show 6 by gatage." the serial communication interface end is communicated by letter with host computer through Controlled by Programmable Controller circuit 5 for running status, gatage signal." serial communication interface end communication that the control signal that host computer sends is also passed through Controlled by Programmable Controller circuit 5.Controlled by Programmable Controller circuit 5 " with the serial communication protocol of host computer be fieldbus MODIBUS agreement, traffic rate is that 9.6Kbps～1Mbps is selected arbitrarily.Connect Programmable Logic Controller PLC direct supply and control circuit power supply.With change-over switch SA1, get to " terrain " position, accumulator change-over switch SA3 puts automated location.The aperture of gate shows and parameter is provided with the employing graphic control panel, parameter setting, modification, and accident record and aperture, state show to be finished by touch-screen, easy to operate, and the graphic presentation image comes into plain view.Touch-screen provides assigned address, and gate promotes, descends, stops and will working automatically according to programmable controller program.
When oil circuit decompression, superpressure, gate downslide 200mm, motor overload, Programmable Logic Controller is according to program work, stopping alarm, and corresponding pilot lamp is bright.During as system's generation emergency condition, should press reset button SB5 rapidly, system's emergency stop is also reported to the police.
SA1 gets to remote location with change-over switch, and accumulator change-over switch SA3 puts automated location.Risen door, fall door, shut down control signal by what host computer sent, (DO, model: MODIBUS serial communication interface termination IC693 MDL645) is received through the central processor CPU of Programmable Logic Controller PLC.Programmable Logic Controller PLC carries out automatic control program.The running status that Programmable Logic Controller PLC uploads, gatage signal etc. are also communicated by letter with host computer through Programmable Logic Controller PLC serial communication interface end.
Contrast Fig. 2, circuit breaker Q F1～QF3 connects the 380VAC power supply.Relay tip KM1～KM3 connects motor M 1～M3 by electrothermal relay KT1～KT3.A wherein phase L1 of 380VAC power supply is through isolating switch SF1, and SF2 exports the 220VAC power supply.Mutual inductor TA1, TA2 and reometer PA1, PA2 is corresponding to be connected.
Contrast Fig. 3, relay line bag KA1, KM4 connect 220VAC power supply 1N2,1U3 end respectively, and relay tip KM401 connects transformer TC1.The end of relay line bag KM5 connects 220VAC power supply 2N2, and the other end connects relay tip KA01.Relay tip KM501 connects transformer TC2.The inferior limit of transformer TC1 and fuse F3, pilot lamp HL7, HL8, direct supply EIP1 corresponding connection respectively.The inferior limit of transformer TC2 is by fuse F5 and relay line bag KA2, KM1, KM2, KM3, electric bell DL, relay tip K1, K2, K3, K10 and direct supply EIP2 corresponding connection respectively.The 2L+ of direct supply EIP2 holds corresponding connection with relay tip K4～K9.2L-end and solenoid valve Y21, Y22, Y1, Y3, the corresponding connection of Y4, Y5 of direct supply EIP2.
Contrast Fig. 4, the outputting data signals of left gatage sensor ZL is through adapter (model; ML-100) the corresponding Controlled by Programmable Controller circuit 5 that inserts " in input interface module D1 (model; SM321) the 2nd～9,12～17 ends, the 1st the end of input interface module D1 is connected the corresponding connection with the 24VDC negative terminal of the 20th end of input interface module D1 with the 24VDC anode.The outputting data signals of right gatage sensor ZR is through adapter (model; MR-100) the corresponding Controlled by Programmable Controller circuit 5 that inserts " in input interface module D2 (model; SM321) the 2nd～9,12～17 ends, the 1st end of input interface module D2 is connected with the 24VDC anode, the corresponding connection with the 24VDC negative terminal of the 20th end of input interface module D2.
The contrast Fig. 5, Controlled by Programmable Controller circuit 5 " in input interface module D3 (model: the 1st end IC693MDL645) is connected with the 24VDC negative terminal.The 2nd～6 end of input interface module D3 is connected with the 24VDC anode through start button SB1, stop button SB2, lifting button SB3, decline button SB4, fault reset button SB5 respectively.The 7th～12 end of input interface module D3 is connected with the 24VDC anode through change-over switch SA1, selector switch SA2, accumulator change-over switch SA3.The 13rd end of input interface module D3 connects relay tip KM502, and the 14th end of input interface module D3 connects relay tip KA202.The corresponding connection of the 20th end of output interface module D4 in the Controlled by Programmable Controller circuit 5 " in output interface module D4 (model: the 1st end IC693MDL741) is connected with the 24VDC anode, Controlled by Programmable Controller electricity loop 5 " with the 24VDC negative terminal.The 12nd～14 end of output interface module D4 in the Controlled by Programmable Controller circuit 5 " in the 2nd～9 end of output interface module D4 through corresponding with the 24VDC anode respectively connection of relay line bag K1～K8, Controlled by Programmable Controller circuit 5 " is through the corresponding connection with the 24VDC anode of relay line bag K9～K11.
The contrast Fig. 6, Controlled by Programmable Controller circuit 5 " in input interface module D5 (model: the 1st end IC693MDL645) is connected with the 24VDC negative terminal.The 2nd～7 end of input interface module D5 is connected with the 24VDC anode respectively through contact SM4, gate fully open position contact SM5, the gate complete shut-down position contact SM6 of contact SM3, the gate downslide H2 of gate full open contact SM1, gate complete shut-down contact SM2, gate downslide H1 respectively.Controlled by Programmable Controller circuit 5 " in the 8th～12 end of input interface module D5 be connected with the 24VDC anode respectively through the too high contact SP1～SP3 of headstock gear oil pressure, contact SP4, SP5, KT102～KT302 respectively.The corresponding connection of the 20th end of output interface module D6 in the Controlled by Programmable Controller circuit 5 " in output interface module D6 (model: the 1st end IC693MDL741) is connected with the 24VDC anode, Controlled by Programmable Controller circuit 5 " with the 24VDC negative terminal.The 2nd～7 end of output interface module D6 is through corresponding with the 24VDC anode respectively connection of pilot lamp HL1～HL6, and the 17th, 18 end of output interface module D6 passes through the corresponding connection with the 24VDC anode of relay tip K1102 through resistance R 1, R2.
The contrast Fig. 7, Controlled by Programmable Controller circuit 5 " in analog output interface circuit module D7 (model: the 3rd, 5,7,9 ends SM332) are respectively through switch SA4, amplification driver AQ1/AQ2 and the corresponding connection of electric-hydraulic proportion variable valve LF, RF.When gate rises
Or when descending, if left and right sides aperture produces deviation, the output of Programmable Logic Controller PLC analog quantity changes, and through amplification driver output, regulates left electric-hydraulic proportion variable valve LF and right electric-hydraulic proportion variable valve RF automatically, and left and right sides aperture is consistent.The 1st end of output interface module D7 is connected with power supply 1L+ end, and the 20th end of output interface module D7 is connected with power supply 1L-end.
Contrast Fig. 8,
Components and parts detail list among table 1 Fig. 2
| Sequence number | Components and parts title/code name | Components and parts model and |
| 1 | Current transformer/TA1, TA2 | LMEJ6-0.38300/5 |
| 2 | Reometer/PA1, PA2 | SS-4/1 |
| 3 | Isolating switch/QF1, QF2, QF3 | DE20Y-400N/330 |
| 4 | Relay/KM | CJ20-160 |
| 5 | Electrothermal relay/KT1, KT2, KT3 | JR16-150/ |
| 6 | Isolating switch/SF1, SF2 | DE20Y-100/130 |
| 7 |
Components and parts detail list among table 2 Fig. 3
| Sequence number | Components and parts title/code name | Components and parts model and |
| 1 | Pilot lamp/HL7, HL8 | AD11-25/21- |
| 2 | Relay K A1, KM4, KM5 | MK3PD-5- |
| 3 | Relay/KA2, KM1, KM2, KM3 | MK3PD-5- |
| 4 | Solenoid valve Y21, Y22, Y1, Y3, Y4, Y5 | QLA18-500 |
| 5 | Stabilized voltage supply/EIP1, EIP1 | E24/5220V/ |
| 6 | Transformer TC1, TC2 | 220VAV/220VAV- |
| 7 | Electric bell/DL1 | φ75AC220V |
| 8 | Fuse/F1～F5 | RL6-25/4A |
Components and parts detail list among table 3 Fig. 4～Fig. 8
| Sequence number | Components and parts title/code name | Components and parts model and | |
| 1 | Pilot lamp/HL1-HL6 | AD11-25/21- | |
| 2 | Button/SB1, SB2, SB4, SB5, | LA18-22 (green) | |
| 3 | Relay/K1～K11 | MK3PD-5- | |
| 4 | Adapter/ML, MR | ML-100/MR-100 | |
| 5 | Gatage sensor/SS1 | DG-40 | |
| 6 | PLC-power module/P1 | IC693PWR321 | |
| 7 | PLC-CPU module/D0 | IC693MDL741 | |
| 8 | PLC-communication module/D8 | IC693CMM311 | |
| 9 | PLC-load module/D1, D2 | SM321 (16 in) | |
| 10 | PLC-load module/D3, D5, | IC693MDL645 | |
| 11 | PLC-output module D4, D6 | IC693MDL741 | |
| 12 | PLC-analog output module D7 | SM332 | |
| 13 | Touch display screen/ | LCD | |
| 14 | Stabilized voltage supply/EIP3 | E24/5220V/ | |
| 15 | Switch SA4 | LW12-16/4.0724.3W |
Claims (5)
1, the hydraulic headstock gear electrical control equipment of band deviation-correcting function, first input end that it is characterized in that the output termination Controlled by Programmable Controller circuit (5 ") of hydraulic headstock gear (1 "), left side gatage sensor (export/go into end and connect gatage display (6 ") respectively for other two of Controlled by Programmable Controller circuit (5 "); the input of communication interface (MODIBUS)/go out end by 2 "); the output terminal of right gatage sensor (3 ") connects second of Controlled by Programmable Controller circuit (5 ") respectively; three input ends; the input end of the output termination hydraulic headstock gear of Motor Control loop (4 ") (1 "); the input end of the output termination Motor Control loop of Controlled by Programmable Controller circuit (5 ") (4 ").
2, the hydraulic headstock gear electrical control equipment of band deviation-correcting function according to claim 1, it is characterized in that (" 1 " end of the input interface module (D3) in 5 ") is connected with the 24VDC negative terminal Controlled by Programmable Controller circuit; " 2～6 " end of input interface module (D3) is respectively through start button (SB1); stop button (SB2); promote button (SB3); decline button (SB4); fault reset button (SB5) is connected with the 24VDC anode, " 7～12 " end of input interface module (D3) is through change-over switch (SA1), selector switch (SA2), accumulator change-over switch (SA3) is connected with the 24VDC anode, " 13 " end of input interface module (D3) connects relay tip (KM502), " 14 " end of input interface module (D3) connects relay tip (KA202), (" 1 " end of the output interface module (D4) in 5 ") is connected with the 24VDC anode Controlled by Programmable Controller circuit; (the corresponding connection with the 24VDC negative terminal of " 20 " end of the output interface module (D4) in 5 ") of Controlled by Programmable Controller circuit, ((K1～K8) corresponding with the 24VDC anode respectively connection, (" 12～14 " end of the output interface module (D4) in 5 ") is through relay line bag (K9～K11) corresponding connection with the 24VDC anode for the Controlled by Programmable Controller circuit through relay line bag for " 2～9 " end of the output interface module (D4) in 5 ") for the Controlled by Programmable Controller circuit.
3, the hydraulic headstock gear electrical control equipment of band deviation-correcting function according to claim 1, it is characterized in that (" 1 " end of the input interface module (D5) in 5 ") is connected with the 24VDC negative terminal Controlled by Programmable Controller circuit; " 2～7 " end of input interface module (D5) is respectively through gate full open contact (SM1); gate complete shut-down contact (SM2); the contact (SM3) of gate downslide (H1) contact; the contact (SM4) of trolley under the gate (H2); gate fully open position contact (SM5), gate complete shut-down position contact (SM6) is connected with the 24VDC anode respectively, (" 8～12 " of the input interface module (D5) in 5 ") end is respectively through the too high contact of headstock gear oil pressure (SP1～SP5); (KT102～KT302) is connected with the 24VDC anode respectively; the Controlled by Programmable Controller circuit (hold and be connected with the 24VDC anode by " 1 " of the output interface module (D6) in 5 ") for the Controlled by Programmable Controller circuit, (the corresponding connection of " 20 " end of the output interface module (D6) in 5 "); " 2～7 " end of output interface module (D6) is through pilot lamp (HL1～HL6) corresponding with the 24VDC anode respectively connection, the " 17 of output interface module (D6) of Controlled by Programmable Controller circuit with the 24VDC negative terminal, 18 " end is through resistance (R1; R2) by the corresponding connection with the 24VDC anode of relay tip (K1102).
4, the hydraulic headstock gear electrical control equipment of band deviation-correcting function according to claim 1, the outputting data signals that it is characterized in that the left gatage sensor (ZL) in the Controlled by Programmable Controller circuit (5 ") is through corresponding " 2～9; 12～17 " end that inserts the input interface module (D1) in the Controlled by Programmable Controller electricity loop (5 ") of adapter, " 1 " end of input interface module (D1) is connected with the 24VDC anode, the corresponding connection of " 20 " end of input interface module (D1) with the 24VDC negative terminal, the outputting data signals of right gatage sensor (ZR) is through corresponding Controlled by Programmable Controller electricity loop (the " 2～9 of the input interface module (D2) in 5 ") that inserts of adapter, 12～17 " end; " 1 " end of input interface module (D2) is connected with the 24VDC anode, the corresponding connection of " 20 " end of input interface module (D2) with the 24VDC negative terminal.
5, the hydraulic headstock gear electrical control equipment of band deviation-correcting function according to claim 1, (" 3,5,7,9 " end of the analog output interface circuit module (D7) in 5 ") is respectively through switch (SA4), amplification driver (AQ1/AQ2) and the corresponding connection of electric-hydraulic proportion variable valve (LF, RF); " 1 " end of output interface module (D7) is connected with power supply (1L+) end, and " 20 " end of output interface module (D7) is connected with power supply (1L-) end to it is characterized in that the Controlled by Programmable Controller circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420027988 CN2738287Y (en) | 2004-06-16 | 2004-06-16 | Electrical control equipment of hydraulic headstock gear with correcting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420027988 CN2738287Y (en) | 2004-06-16 | 2004-06-16 | Electrical control equipment of hydraulic headstock gear with correcting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2738287Y true CN2738287Y (en) | 2005-11-02 |
Family
ID=35348192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420027988 Expired - Fee Related CN2738287Y (en) | 2004-06-16 | 2004-06-16 | Electrical control equipment of hydraulic headstock gear with correcting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2738287Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608957A (en) * | 2011-04-19 | 2012-07-25 | 河海大学 | Industrial network type two-stage combined control system and method |
| CN102722134A (en) * | 2012-06-05 | 2012-10-10 | 昆明理工大学 | Gate opening and angle coded value curve fitting method |
| CN103352448A (en) * | 2013-06-14 | 2013-10-16 | 山东省水利勘测设计院 | Layered water intake gate |
| CN104499461A (en) * | 2014-12-16 | 2015-04-08 | 长江勘测规划设计研究有限责任公司 | Method for adjusting electrical control parameters of proportioning valves of double-cylinder hydraulic gate hoist |
| CN107121966A (en) * | 2017-06-21 | 2017-09-01 | 肇庆市贺江电力发展有限公司 | Gate control system and method |
| CN110593214A (en) * | 2019-08-06 | 2019-12-20 | 贵州乌江水电开发有限责任公司思林发电厂 | Automatic leveling system for lifting gate and gate |
-
2004
- 2004-06-16 CN CN 200420027988 patent/CN2738287Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102608957A (en) * | 2011-04-19 | 2012-07-25 | 河海大学 | Industrial network type two-stage combined control system and method |
| CN102722134A (en) * | 2012-06-05 | 2012-10-10 | 昆明理工大学 | Gate opening and angle coded value curve fitting method |
| CN103352448A (en) * | 2013-06-14 | 2013-10-16 | 山东省水利勘测设计院 | Layered water intake gate |
| CN104499461A (en) * | 2014-12-16 | 2015-04-08 | 长江勘测规划设计研究有限责任公司 | Method for adjusting electrical control parameters of proportioning valves of double-cylinder hydraulic gate hoist |
| CN104499461B (en) * | 2014-12-16 | 2016-03-30 | 长江勘测规划设计研究有限责任公司 | The method of adjustment of double-cylinder hydraulic gate hoist ratio adjusting valve electrical control parameter |
| CN107121966A (en) * | 2017-06-21 | 2017-09-01 | 肇庆市贺江电力发展有限公司 | Gate control system and method |
| CN110593214A (en) * | 2019-08-06 | 2019-12-20 | 贵州乌江水电开发有限责任公司思林发电厂 | Automatic leveling system for lifting gate and gate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101560741B (en) | Method for controlling flow of transmission control system of paper machine | |
| CN2884175Y (en) | Electric cylinder testing platform | |
| CN201436280U (en) | Multi-point synchronization hydraulic lifting system | |
| CN2738287Y (en) | Electrical control equipment of hydraulic headstock gear with correcting function | |
| CN202521031U (en) | Single-channel digital proportional valve amplifier | |
| CN108561346B (en) | Precise pressure control system of servo pump control hydraulic machine and hydraulic machining method | |
| CN204591851U (en) | Multistage flow pressure compound control system | |
| CN202579464U (en) | Intelligent pressure gage hydraulic system of roller-changing trolley | |
| CN206530575U (en) | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press | |
| CN203614479U (en) | Tundish lifting hydraulic device with high synchronization accuracy | |
| CN205001610U (en) | Cell -phone remote control executor | |
| CN205028093U (en) | Water injection remote control current stabilizer | |
| CN204215247U (en) | A kind of UHV (ultra-high voltage) plate forming hydraulic press control system | |
| CN101829751A (en) | Pressure machine closed height adjusting device and control system thereof | |
| CN203362685U (en) | Electric hydraulic control device for lifting supporting bridge | |
| CN103343762A (en) | Power-driven hydraulic control device for lifting support bridge and control method of power-driven hydraulic control device | |
| CN211730402U (en) | Hydraulic structure of bus punching machine | |
| CN201196176Y (en) | Liquid filling device of hydraulic cylinder controlled by reversal valve | |
| CN2585200Y (en) | Automatic weighing equipment for large structure article | |
| CN2700928Y (en) | Combined type programmable automatic measurement and electrical control screen | |
| CN201408336Y (en) | Programmable multiple-channel impulse control device | |
| CN211715425U (en) | Efficient potential energy recovery system of lifting equipment | |
| CN205013442U (en) | Single servo motor double pump closed loop control system | |
| CN106122186B (en) | A kind of hydraulic system for realizing the stepless accurate speed governing of hydraulic press | |
| CN102241156A (en) | Enclosed height adjustment device for press machine and control system of enclosed height adjustment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |