CN201990985U - Dam double cylinder hydraulic gate intelligent control system - Google Patents
Dam double cylinder hydraulic gate intelligent control system Download PDFInfo
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- CN201990985U CN201990985U CN2010206763615U CN201020676361U CN201990985U CN 201990985 U CN201990985 U CN 201990985U CN 2010206763615 U CN2010206763615 U CN 2010206763615U CN 201020676361 U CN201020676361 U CN 201020676361U CN 201990985 U CN201990985 U CN 201990985U
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Abstract
The utility model discloses a dam double cylinder hydraulic gate intelligent control system, belonging to the field of reservoir dam headstock gear equipment control. The system is used for controlling gate pressure building and on-off directional valve blocks, gate rectification and speed regulation valve blocks, and oil pump motors. The signals of the hydraulic pipeline rod cavity pressure switch and pressure transmitter set, the oil level detection switch of an oil return case, the temperature switch of the oil return case, and a gate opening detection means are needed to be detected. The system is subject to the control of the plant monitoring system of a hydropower station by means of communication and hard contact redundancy, and the information of the system is transmitted to the plant monitoring system and the dam hydrologic forecast system to realize the data exchange with the plant monitoring system. The system provided overcomes the defects of low detection precision, low reliability and difficult maintenance of a traditional double cylinder hydraulic gate and plays an important role in the safe operation of dams and the uniform power generation of a power station.
Description
Technical field
The utility model relates to reservoir dam headstock gear equipment control technology field, is specifically related to a kind of dam double-cylinder hydraulic gate intelligence control system.
Background technology
Dam double-cylinder hydraulic sluice control system is the important component part of big-and-middle-sized key water control project, be the control system of the dash equipment and the main escape way of reservoir flood discharge in flood season of reservoir effective storage, the reliability service of dam double-cylinder hydraulic sluice control system is to regulating and control reservoir level, guaranteeing that even generating, dam safety operation etc. play an important role.
At present, based on traditional dam double-cylinder hydraulic sluice control system is low because of measurement mechanism link precision, the node link is many, or the disposal ability of the miniature PLC of unity logic processing is limited, the pump start protection is not thorough, reasons such as control loop complexity cause system effectively gate correction, job insecurity, poor reliability easily, can not satisfy the needs of current double-cylinder hydraulic gate Based Intelligent Control; The development need of power station and dam regimen station " few people on duty, unmanned " also requires system to realize the Large Volume Data exchange with distant place monitoring power station and hydrological telemetry system simultaneously.Traditional dam double-cylinder hydraulic sluice control system human-computer dialogue is single, operation conditions and query history service data that can not real-time display system, the also quick needs of safeguarding of incompatibility equipment.
In order to solve the above-mentioned problems in the prior art, this patent provides a kind of new solution.
Summary of the invention
In order to overcome the problem of above-mentioned the deficiencies in the prior art and existence, the utility model provides a kind of dam double-cylinder hydraulic gate intelligence control system, the direct collection site gatage of the PLC of this system module sensor signal, possess perfect multi-protocol communication pattern, simple in structure, perfect in shape and function, easy to learn, easy to maintenance, really reliable, stable, the safe operation for the dam headstock gear provides assurance.
To achieve the above object of the invention, the technical scheme that the utility model adopted is: a kind of dam double-cylinder hydraulic gate intelligence control system is provided, it is characterized in that: comprising that dam double-cylinder hydraulic gate intelligence controlling device, Oil pump electrical machinery group, gate are built presses and opens and closes reversal valve group, gate correction valve group, pressure switch group, pressure transmitter, oil sump tank oil level transmitter, oil sump tank temperature converter and gatage checkout gear; Described Oil pump electrical machinery group, gate are built pressure and are opened and closed the reversal valve group and be connected with the signal output part of dam double-cylinder hydraulic gate intelligence controlling device respectively with gate correction valve group, and pressure switch group, pressure transmitter, oil sump tank oil level transmitter, oil sump tank temperature converter and gatage checkout gear are connected with the signal input part of dam double-cylinder hydraulic gate intelligence controlling device respectively; Be provided with motor main circuit, control power circuit, simulated measurement input circuit, switching value input circuit, switching value output circuit in the described dam double-cylinder hydraulic gate intelligence controlling device, be used to detect on the SSI modular circuit of the left and right sides stroke of gate, the hard contact switch amount and send and display circuit and solenoid valve control circuit; Described dam double-cylinder hydraulic gate intelligence controlling device is by sending on the hard contact switch amount and display circuit is connected with full factory monitoring system with the clear measuring and reporting system of dam water respectively.
Described motor main circuit comprises two air-breaks, two soft initiators, soft initiator control electric power loop and miniature circuit breakers; Described two air-breaks upper end is connected with AC power respectively, and two air-break lower ends are connected with two soft initiators respectively; Described two soft initiators are connected with two motors respectively; Described soft initiator control electric power loop is connected with the air-break lower end by little line breaker respectively.
Described control power circuit comprises and exchanges air switch, two Switching Power Supplies, direct current air switch, two power monitoring relays, two bridges heaps and miniature circuit breaker; The input of described interchange air switch links to each other with AC power, and the output that exchanges air switch links to each other with the power input of Switching Power Supply; The input of described direct current air switch links to each other with dc source, and the output of direct current air switch links to each other with the power input of Switching Power Supply; The output of described Switching Power Supply is the parallel connection power supply supervisory relay respectively, is parallel to together behind the cascaded bridges heap respectively again; Output circuit after the parallel connection is to be connected to PLC and HMI electric power loop and to show the control operation loop by miniature circuit breaker respectively.
At least contact is selected in the automatic/distant place that includes the gate control mode in the described switching value input circuit, the finger contact of operating gate mode, emergency stop push button, the automatic selection contact of Oil pump electrical machinery, the normal opened contact of Oil pump electrical machinery running status relay, the parallel connection input of control power monitoring relay, the major loop line breaker auxiliary contact of Oil pump electrical machinery, the too high contact of system pressure, system pressure is crossed low contact, left and right sides rod chamber hypotony contact, rodless cavity pressure hangs down contact, oil suction and oil return oil filter stop up contact, gate full open contact and gate complete shut-down contact; Described simulated measurement input circuit comprises system pressure input contact, oil sump tank oil level input contact and oil sump tank temperature input contact at least.
Described SSI modular circuit adopts 15D type needle connector to link to each other with outside encoder.
Described switching value output circuit includes Oil pump electrical machinery control relay control output contact, gate opening/closing control relay control output contact, gate left and right sides speed governing correction control relay control output contact, gate standard-sized sheet/complete shut-down state relay control output contact, the unusual relay control of oil pressure output contact, the unusual relay control of oil level output contact, PLC fault output relay control output contact and system alarm output buzzer output contact at least.
Give on the described hard contact switch amount and display circuit comprise at least control power failure contact, plant failure contact, oil pump fault/operation contact, the unusual contact of oil pressure, the unusual contact of oil level, gate standard-sized sheet/complete shut-down relay tip, gate opening/closed relay contact, gate control mode automatically/effective secondary status contact of the automatic selection contact of distant place selection contact, Oil pump electrical machinery; Also be provided with on the described dam double-cylinder hydraulic gate intelligence controlling device be used to show each oil pump operation and malfunction, power monitoring, system and device fault, oil pressure is unusual, oil level is unusual, gate opens/close state, the status indicator lamp of a gate left side/right side correction speed governing state, gate standard-sized sheet/complete shut-down state.
The constant open contact of described solenoid valve control circuit by the gate control relay respectively regulating gate opens solenoid valve, close electromagnetic valve, left speed governing correction electromagnetic valve, right speed governing correction electromagnetic valve and system and build pressure electromagnetic valve; Be parallel with corresponding state on each described electromagnetic valve respectively and show indicator lamp.
In sum, dam double-cylinder hydraulic gate intelligence control system provided by the utility model has following advantage:
1, adopt high-performance PLC control, fast operation is handled in time; Has the data communication interface more than 2; Realize and computer control for hydropower station system and the exchange of dam hydrological telemetry system Large Volume Data; Realization has big picture, many contents, omnibearing human-computer dialogue.
2, adopt the start and stop of soft initiator control Oil pump electrical machinery, reduce the pressure drop that causes because of electric motor starting, effectively prevent water hammer effect and reduce mechanical shock pipeline and gate valve.
3, internal system is simple in structure, component moduleization, and working service is simple and convenient, and the control power supply is DC24V, and maintenance safe is reliable.
4, adopt PLC functional module SSI module directly to gather the left and right sides run-length encoding device of gate, reduced the intermediate link of aperture device, simplified system architecture, guarantee that the correct of gatage shows in real time, makes the correction of gate that correct foundation arranged.
Description of drawings
Fig. 1 moves towards sketch for the signal of dam double-cylinder hydraulic gate intelligence control system;
Fig. 2 is the schematic diagram of motor main circuit;
Fig. 3 is the schematic diagram of control power circuit;
Fig. 4 is the input contact schematic diagram of first DI module of switching value input circuit;
Fig. 5 is the input contact schematic diagram of second DI module of switching value input circuit;
Fig. 6 is the schematic diagram of SSI modular circuit;
Fig. 7 is the schematic diagram of simulated measurement input circuit;
Fig. 8 is the schematic diagram of switching value output circuit;
Fig. 9 is for sending on the hard contact switch amount and the schematic diagram of display circuit;
Figure 10 is the schematic diagram of solenoid valve control circuit.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in detail:
As shown in Figure 2,2 road AC380 power supplys of three-phase four-wire system are respectively through power wiring terminal XD:1/XD:2/XD:3 and XD:8/XD:9/XD:10 access dish cabinet, the end of incoming cables that connects air-break QM1 and QM2 again, the air-break leading-out terminal connects the major loop input terminal 1L1/3L2/5L3 of soft initiator AG1/AG2, the C of two air-break leading-out terminals little disconnected QF7/QF8 that is in parallel, the outlet of soft initiator major loop is connected to dish cabinet power through terminal 2T1/4T2/6T3 and terminal XD:5/XD:6/XD:7 and XD:11/XD:12/XD:13 occur.The control power supply of soft initiator is AC220V, introduces CL1 through QF7/QF8, and the N line directly inserts CL2.The start and stop of the soft initiator control mode of connection: RUN and STOP terminal normal opened contact in parallel and that insert PLC output control relay KA1/KA2 is connected on soft initiator+24V.The state output of soft initiator picks out by R2A/R2C and R1A/R1C terminal, R2A/R1A Access Control power supply 201 in parallel, R2C and R1C receive respectively on the coil pin 14 of KC1/KC3 and KC2/KC4, the 0V of the coil pin 13 Access Control power supplys in parallel of KC1～KC4.The pin of the breaking coil 1QFM/2QFM of soft initiator control electric power loop QM1/QM2 in parallel in the gate operation in emergency circumstances, disconnects the main contacts of main circuit breaker.
Control power supply as shown in Figure 3 is: the input that exchanges air switch QF1 links to each other with N with the B2 of AC power respectively, and output links to each other with the power input of Switching Power Supply US1; The input of direct current air switch QF2 links to each other with DC220-with dc source DC220+ respectively, and output links to each other with the power input of Switching Power Supply US2.The output of power supply US1 and US2 is parallel connection power supply supervisory relay KE1 and KE2 respectively, cascaded bridges is piled VD1 and VD2 respectively again, final two power supplys are parallel to together, circuit after the parallel connection is by the branch road of miniature circuit breaker QF3/QF4 to each electricity consumption place: link to each other with the HMI electric power loop with PLC behind the QF3, link to each other with display operation and power of electromagnetic valve loop behind the QF4.
As shown in Figure 4 and Figure 5, power supply 101 leading-in ends of the switching input module of PLC are 17 and 19 terminals of module, and the 0V leading-in end is 18 and 20 terminals of module.The input contact 1～15 (16 is standby) that inserts first DI module of PLC comprises successively: contact is selected in automatic/distant place of gate control mode SA3, the constant open contact of the finger contact SB5/SB7/SB6 of operating gate mode (remote operation signal in parallel), emergency stop push button SB8 constant open contact, the automatic selection contact SA1 of 1# Oil pump electrical machinery, the automatic selection contact SA2 of 2# Oil pump electrical machinery, the constant open contact of 1# Oil pump electrical machinery running status relay K C1, the constant open contact of 2# Oil pump electrical machinery running status relay K C3, the constant open contact of 1# Oil pump electrical machinery malfunction relay K C2, the constant open contact of 2# Oil pump electrical machinery running status relay K C4, the parallel connection input of control power monitoring relay K E1/KE2 constant close contact, the major loop circuit breaker Q M1 auxiliary contact of 1# Oil pump electrical machinery, the major loop circuit breaker Q M2 auxiliary contact of 2# Oil pump electrical machinery etc.The input contact 1～10 (11～16 is standby) that inserts second DI module of PLC comprises successively: system pressure too high, low with excessivelying, left and right sides rod chamber hypotony, the low equal pressure switch of rodless cavity pressure often drive node, oil suction and oil return oil filter obstruction switch often open node, gate standard-sized sheet, complete shut-down state contact etc.Outward element inserts PLC and connects by the terminal X:26～X:35 that coils cabinet, and the common port that outward element inserts is terminal X:2, X:5, the X:6 of dish cabinet.
PLC as shown in Figure 6 detects the left and right sides stroke of gate with the SSI interface shape.The SSI special module of PLC adopts 15D type needle connector to link to each other with outside encoder, the signal that need to insert comprises: signal+, signal-, clock+, clock-, 24V, 0V, encoder power supply feedback etc., 1/2/6/14/7/8/13 of AM access module two SSI interface 15D draws the hole respectively.
The 0V leading-in end of the analog quantity input module of PLC as shown in Figure 7 is 2,7,12,17 terminals of module, and 1,6,11, No. 16 terminal connects signal ground.The analog quantity input contact that inserts PLC comprises: system pressure, oil sump tank oil level, oil sump tank temperature etc.External system pressure transducer signal access dish cabinet terminal X5:1, oil sump tank oil level transducer signal access dish cabinet terminal X5:3, oil sump tank temperature transmitter signal access dish cabinet terminal X5:5.The DC24V power supply of sensor is provided by the terminal X5:11/12/13 of dish cabinet.
PLC switching value output loop as shown in Figure 8, power supply 101 leading-in ends are 18 and 20 terminals of module, and the 0V leading-in end is 17 and 19 terminals of module.No. 1 terminal of PLC output module is received on No. 7 pins of SA1, the normal opened contact of No. 8 pin series connection KC2 of SA1, the normal opened contact of KC6, coil 14 pins of KA1; No. 2 terminals of PLC output module are received on No. 7 pins of SA2, the normal opened contact of No. 8 pin series connection KC4 of SA2, the normal opened contact of KC6, coil 14 pins of KA2; No. 3 terminal serial connection KC5 constant open contacts of PLC output module, the constant close contact of KA7/KA4/KC7, coil 14 pins of KA3; No. 4 terminal serial connection KC5 constant open contacts of PLC output module, the constant close contact of KA8/KA3/KC8, coil 14 pins of KA4; No. 5 terminal serial connection KC5 constant open contacts of PLC output module, the constant close contact of KA6, coil 14 pins of KA5; No. 6 terminal is connected in series KC5 constant open contact, the constant close contact of KA5, coil 14 pins of KA6; 7～No. 11 terminals of PLC output module connect coil 14 pins of KA7～KA11 respectively, No. 12 terminals connection buzzer HA1 of PLC output module+end.No. 13 pins of all output relay pins, buzzer HA1-end Access Control power supply in parallel 0V.
Send circuit as shown in Figure 9 on the hard contact switch amount of system: the parallel connection of the normally closed point of control power failure KE1/KE2 is one the tunnel, plant failure KA11 constant open contact, the constant open contact of 1# and 2# oil pump fault/operation KC1-KC4, the unusual KA9 constant open contact of oil pressure, the unusual KA10 constant open contact of oil level, gate standard-sized sheet/complete shut-down relay K A7/KA8 constant open contact, gate opening/closed relay KA3/KA4 constant open contact, the contact is selected in automatic/distant place of gate control mode SA3, effective secondary status contact of the automatic selection contact SA1/SA2 of Oil pump electrical machinery etc.Native system comprises by the state that indicator lamp HL1～HL14 shows: the operation of 1# oil pump HL2,1# oil pump fault HL9,2# oil pump operation HL3,1# oil pump fault HL10, power monitoring HL1, system and device fault HL8, the unusual HL7 of oil pressure, the unusual HL14 of oil level, gate open HL4/ and close HL11 state, the right HL12 correction of gate left side HL5/ speed governing state, gate standard-sized sheet HL6/ complete shut-down HL13 state etc.Each indicator lamp connects the corresponding relays contact respectively.
Electromagnetic valve loop as shown in figure 10, he comprises by system manually or the automatic gate control relay in terrain/distant place: the constant open contact of gate opening KA3, closing gate KA4, gate left side speed governing correction KA5, the right speed governing correction of gate KA6 respectively regulating gate unlatching, close, the electromagnetic valve of functions such as left speed governing correction, right speed governing correction, system builds pressure electromagnetic valve by KA3 and KA4 Parallel Control; And corresponding state in parallel respectively shows indicator lamp HL4, HL11, HL5, HL12 on the On/Off of gate/left speed governing correction/right speed governing correction electromagnetic valve; Voltage stabilizing all in parallel of all electromagnetic valves and fly-wheel diode guarantee the electromagnetic valve regular event and reduce the impact of electromagnetic valve action to system's control voltage.
It below only is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also carry out some improvement and distortion to the utility model, these improvement and distortion also fall in the protection domain of the present utility model.
Claims (8)
1. dam double-cylinder hydraulic gate intelligence control system is characterized in that: comprising that dam double-cylinder hydraulic gate intelligence controlling device, Oil pump electrical machinery group, gate are built presses and opens and closes reversal valve group, gate correction valve group, pressure switch group, pressure transmitter, oil sump tank oil level transmitter, oil sump tank temperature converter and gatage checkout gear; Described Oil pump electrical machinery group, gate are built pressure and are opened and closed the reversal valve group and be connected with the signal output part of dam double-cylinder hydraulic gate intelligence controlling device respectively with gate correction valve group, and pressure switch group, pressure transmitter, oil sump tank oil level transmitter, oil sump tank temperature converter and gatage checkout gear are connected with the signal input part of dam double-cylinder hydraulic gate intelligence controlling device respectively; Be provided with motor main circuit, control power circuit, simulated measurement input circuit, switching value input circuit, switching value output circuit in the described dam double-cylinder hydraulic gate intelligence controlling device, be used to detect on the SSI modular circuit of the left and right sides stroke of gate, the hard contact switch amount and send and display circuit and solenoid valve control circuit; Described dam double-cylinder hydraulic gate intelligence controlling device is by sending on the hard contact switch amount and display circuit is connected with full factory monitoring system with the clear measuring and reporting system of dam water respectively.
2. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: described motor main circuit comprises two air-breaks, two soft initiators, soft initiator control electric power loop and miniature circuit breakers; Described two air-breaks upper end is connected with AC power respectively, and two air-break lower ends are connected with two soft initiators respectively; Described two soft initiators are connected with two motors respectively; Described soft initiator control electric power loop is connected with the air-break lower end by little line breaker respectively.
3. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: described control power circuit comprises and exchanges air switch, two Switching Power Supplies, direct current air switch, two power monitoring relays, two bridges heaps and miniature circuit breaker; The input of described interchange air switch links to each other with AC power, and the output that exchanges air switch links to each other with the power input of Switching Power Supply; The input of described direct current air switch links to each other with dc source, and the output of direct current air switch links to each other with the power input of Switching Power Supply; The output of described Switching Power Supply is the parallel connection power supply supervisory relay respectively, is parallel to together behind the cascaded bridges heap respectively again; Output circuit after the parallel connection is to be connected to PLC and HMI electric power loop and to show the control operation loop by miniature circuit breaker respectively.
4. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: contact is selected in the automatic/distant place that includes the gate control mode in the described switching value input circuit at least, the finger contact of operating gate mode, emergency stop push button, the automatic selection contact of Oil pump electrical machinery, the normal opened contact of Oil pump electrical machinery running status relay, the parallel connection input of control power monitoring relay, the major loop line breaker auxiliary contact of Oil pump electrical machinery, the too high contact of system pressure, system pressure is crossed low contact, left and right sides rod chamber hypotony contact, rodless cavity pressure hangs down contact, oil suction and oil return oil filter stop up contact, gate full open contact and gate complete shut-down contact; Described simulated measurement input circuit comprises system pressure input contact, oil sump tank oil level input contact and oil sump tank temperature input contact at least.
5. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: described SSI modular circuit adopts 15D type needle connector to link to each other with outside encoder.
6. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: described switching value output circuit includes Oil pump electrical machinery control relay control output contact at least, gate opening/closing control relay control output contact, gate left and right sides speed governing correction control relay control output contact, gate standard-sized sheet/complete shut-down state relay control output contact, the unusual relay control of oil pressure output contact, the unusual relay control of oil level output contact, PLC fault output relay control output contact and system alarm output buzzer output contact.
7. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: give on the described hard contact switch amount and display circuit comprise at least control power failure contact, plant failure contact, oil pump fault/operation contact, the unusual contact of oil pressure, the unusual contact of oil level, gate standard-sized sheet/complete shut-down relay tip, gate opening/closed relay contact, gate control mode automatically/effective secondary status contact of the automatic selection contact of distant place selection contact, Oil pump electrical machinery; Also be provided with on the described dam double-cylinder hydraulic gate intelligence controlling device be used to show each oil pump operation and malfunction, power monitoring, system and device fault, oil pressure is unusual, oil level is unusual, gate opens/close state, the status indicator lamp of a gate left side/right side correction speed governing state, gate standard-sized sheet/complete shut-down state.
8. dam double-cylinder hydraulic gate intelligence control system according to claim 1 is characterized in that: the constant open contact of described solenoid valve control circuit by the gate control relay respectively regulating gate opens solenoid valve, close electromagnetic valve, left speed governing correction electromagnetic valve, right speed governing correction electromagnetic valve and system and build pressure electromagnetic valve; Be parallel with corresponding state on each described electromagnetic valve respectively and show indicator lamp.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206763615U CN201990985U (en) | 2010-12-23 | 2010-12-23 | Dam double cylinder hydraulic gate intelligent control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010206763615U CN201990985U (en) | 2010-12-23 | 2010-12-23 | Dam double cylinder hydraulic gate intelligent control system |
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| CN201990985U true CN201990985U (en) | 2011-09-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889413A (en) * | 2012-10-21 | 2013-01-23 | 上海恳工自动化设备有限公司 | Intelligent electric control system and method of redundancy actuator for valve |
| CN103669295A (en) * | 2012-09-05 | 2014-03-26 | 江苏晨光盛得液压设备有限公司 | Intelligent hydraulic hoist |
| CN105955330A (en) * | 2014-12-04 | 2016-09-21 | 熊达煜 | Automatic control dam water pressure detection device and monitoring method thereof |
| CN109083105A (en) * | 2018-09-10 | 2018-12-25 | 佛山市金净创环保技术有限公司 | A kind of intermittent Water valve control device adjusted by liquid |
| CN115453924A (en) * | 2022-04-28 | 2022-12-09 | 天地(榆林)开采工程技术有限公司 | Disc brake control system and control method |
-
2010
- 2010-12-23 CN CN2010206763615U patent/CN201990985U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103669295A (en) * | 2012-09-05 | 2014-03-26 | 江苏晨光盛得液压设备有限公司 | Intelligent hydraulic hoist |
| CN102889413A (en) * | 2012-10-21 | 2013-01-23 | 上海恳工自动化设备有限公司 | Intelligent electric control system and method of redundancy actuator for valve |
| CN105955330A (en) * | 2014-12-04 | 2016-09-21 | 熊达煜 | Automatic control dam water pressure detection device and monitoring method thereof |
| CN105955330B (en) * | 2014-12-04 | 2018-09-25 | 齐齐哈尔市水利勘测设计研究院有限责任公司 | One kind automatically controlling dam hydraulic pressure force checking device and its monitoring method |
| CN109083105A (en) * | 2018-09-10 | 2018-12-25 | 佛山市金净创环保技术有限公司 | A kind of intermittent Water valve control device adjusted by liquid |
| CN115453924A (en) * | 2022-04-28 | 2022-12-09 | 天地(榆林)开采工程技术有限公司 | Disc brake control system and control method |
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Granted publication date: 20110928 Termination date: 20151223 |
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