CN219345140U - Safety diagnosis device for detecting faults of hydraulic equipment through current collection - Google Patents
Safety diagnosis device for detecting faults of hydraulic equipment through current collection Download PDFInfo
- Publication number
- CN219345140U CN219345140U CN202320178736.2U CN202320178736U CN219345140U CN 219345140 U CN219345140 U CN 219345140U CN 202320178736 U CN202320178736 U CN 202320178736U CN 219345140 U CN219345140 U CN 219345140U
- Authority
- CN
- China
- Prior art keywords
- current
- hydraulic
- current collection
- controller
- driving motor
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a safety diagnosis device for detecting faults of hydraulic equipment through current collection, which is applied to a hydraulic system, wherein the hydraulic system comprises a controller and a hydraulic pump driving motor, the diagnosis device comprises a current collection unit and a local server, and the current collection unit is arranged at an outlet end of the hydraulic pump driving motor; the system further comprises a gateway, wherein the gateway is respectively connected with the current acquisition unit and the controller, and the gateway is connected with the local server through an Ethernet switch. The safety diagnosis device provided by the utility model is used for collecting the current of the outlet end of the hydraulic pump driving motor in the hydraulic system by arranging the current collecting unit, transmitting the current change of the hydraulic pump driving motor and the control signal and feedback signal of the controller in the hydraulic system to the local server in real time by the gateway, and carrying out safety diagnosis on the faults of equipment in the hydraulic system by analyzing the information by the local server, so that the diagnosis speed is high, the accuracy is high, and the safety of the hydraulic system is higher.
Description
Technical Field
The utility model relates to the technical field of hydraulic systems, in particular to a safety diagnosis device for detecting faults of hydraulic equipment through current collection.
Background
With the development of industrial automation, hydraulic equipment is increasingly widely used in drilling top drive devices with the unique advantages of the hydraulic equipment. However, hydraulic components and hydraulic systems have their specificity quite different from mechanical devices. The components and the working fluid of the device work in a closed oil way, are not as visual as other mechanical equipment, and can conveniently measure various parameters by using instruments such as universal meters, clamp meters, oscilloscopes and other conventional electricians as electric equipment. The working state of the system is indicated by only a limited number of pressure gauges, flow meters and the like in the hydraulic equipment, and the fault has the characteristics of concealment, diversity, uncertainty, causality complexity and the like, and the cause is not easy to find after the fault occurs. Once the hydraulic system fails, the equipment is damaged and stopped, the whole drilling process is influenced, the personal safety and the equipment safety can be endangered, the environment pollution is caused, and huge economic loss is caused. Therefore, how to ensure the normal operation of the hydraulic system, how to find faults in time and even find symptoms of the faults in advance are urgent problems to be solved.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a safety diagnosis device for detecting faults of hydraulic equipment through current collection, the safety diagnosis device collects current at an outlet end of a hydraulic pump driving motor in a hydraulic system through a current collection unit, and transmits current change of the hydraulic pump driving motor and control signals and feedback signals of a controller in the hydraulic system to a local server in real time through a data service gateway, and the local server performs safety diagnosis on the faults of the equipment in the hydraulic system through analyzing the information, so that the diagnosis speed is high, the diagnosis accuracy is high, and the safety of the hydraulic system is higher.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a safety diagnosis device for detecting faults of hydraulic equipment through current collection, which is applied to a hydraulic system, wherein the hydraulic system comprises a controller and a hydraulic pump driving motor, and comprises a current collection unit and a local server, and the current collection unit is arranged at an outlet end of the hydraulic pump driving motor;
the system also comprises a data service gateway which is respectively connected with the current acquisition unit and the controller, and the data service gateway is connected with the local server through an Ethernet switch.
When the safety diagnosis device for detecting the faults of the hydraulic equipment through current collection is used, the current collection unit detects the current of the outlet end of the hydraulic pump driving motor in the hydraulic system, detects the current change value of the hydraulic pump driving motor in real time, transmits current data to a local server through the data service gateway and the Ethernet switch, and simultaneously, when a controller in the hydraulic system controls each element in the hydraulic system, the transmitted control signal and feedback signal are transmitted to the local server through the data service gateway and the Ethernet switch. In the local server, through the SCADA system to the current variation of hydraulic pump driving motor cooperation controller's signal analysis, the possible trouble that exists in the analysis hydraulic system and demonstrate the man-machine interface at the local server, provide the reference for the technicians, make things convenient for the technicians to discover the trouble fast and locate the trouble fast, have important meaning to promoting hydraulic system's overall security.
The safety diagnosis device is characterized in that the current collection unit is arranged to collect current from the outlet end of the hydraulic pump driving motor in the hydraulic system, and the current change of the hydraulic pump driving motor and the control signal and feedback signal of the controller in the hydraulic system are transmitted to the local server in real time through the data service gateway, and the local server performs safety diagnosis on the faults of equipment in the hydraulic system by analyzing the information, so that the diagnosis speed is high, the accuracy is high, and the safety of the hydraulic system is higher.
In a further embodiment, the controller is a PLC controller with model S7300CPU315-2 DP.
The PLC controller is selected to conveniently control valves and switches in the hydraulic system, meanwhile, control feedback signals can be transmitted outwards, and the S7300CPU315-2DPPLC can be connected with a network interface through an interface conversion module, so that the PLC controller is convenient to connect with a data service gateway, and the requirements for control and signal transmission are met.
In a further technical scheme, the current acquisition unit comprises a current transformer and a current acquisition module, and the current transformer is arranged at the wire outlet end of the hydraulic pump driving motor.
The current of the outlet end of the hydraulic pump driving motor is detected in real time through the current transformer, high-frequency sampling is adopted for current data, periodic calculation is carried out on the data in the current acquisition module, the calculation result is root mean square of the effective value of the current, and the current detection precision is high.
In a further technical scheme, the model of the current acquisition module is HY02-06.
In a further technical scheme, the type of the current transformer is HL47.
HL47 acquisition sensitivity is high, accuracy is high, and current measurement range is 0-15A.
In a further technical scheme, the controller is connected with the data service gateway through a ProfibusDP to ethernet interface module.
In a further technical scheme, the model number of the ProfibusDP to ethernet interface module is BCNET-S7300.
In a further technical scheme, the model of the data service gateway is HY01-02N-04S.
In a further technical scheme, the current acquisition unit is connected with the data service gateway through an RS485 communication cable.
The RS485 communication mode adopts twisted pair, differential signals are adopted for transmission, the field is convenient to arrange, the technology is mature, the stability and the safety are high, the current data transmission period is 500ms, and the data detection response is faster.
The beneficial effects are that:
1. the safety diagnosis device is characterized in that the current collection unit is arranged to collect current from the outlet end of the hydraulic pump driving motor in the hydraulic system, and the current change of the hydraulic pump driving motor and the control signal and feedback signal of the controller in the hydraulic system are transmitted to the local server in real time through the data service gateway, and the local server performs safety diagnosis on the faults of equipment in the hydraulic system by analyzing the information, so that the diagnosis speed is high, the accuracy is high, and the safety of the hydraulic system is higher.
2. The PLC controller is selected to conveniently control valves and switches in the hydraulic system, meanwhile, control feedback signals can be transmitted outwards, and the S7300CPU315-2DPPLC can be connected with a network interface through an interface conversion module, so that the PLC controller is convenient to connect with a data service gateway, and the requirements for control and signal transmission are met.
3. The current of the outlet end of the hydraulic pump driving motor is detected in real time through the current transformer, high-frequency sampling is adopted for current data, periodic calculation is carried out on the data in the current acquisition module, the calculation result is root mean square of the effective value of the current, and the current detection precision is high.
4. HL47 acquisition sensitivity is high, accuracy is high, and current measurement range is 0-15A.
5. The RS485 communication mode adopts twisted pair, differential signals are adopted for transmission, the field is convenient to arrange, the technology is mature, the stability and the safety are high, the current data transmission period is 500ms, and the data detection response is faster.
Drawings
FIG. 1 is a circuit diagram of a current collection unit and a hydraulic pump drive motor of a safety diagnostic apparatus for detecting a hydraulic equipment failure by current collection according to an embodiment of the present utility model;
FIG. 2 is a signal transmission line diagram of a safety diagnostic apparatus for detecting a malfunction of a hydraulic device by current collection according to an embodiment of the present utility model;
FIG. 3 is a circuit diagram of a first portion of a digital quantity input module of a controller of a safety diagnostic apparatus for detecting a hydraulic equipment fault through current collection in accordance with an embodiment of the present utility model;
FIG. 4 is a circuit diagram of a second portion of the digital quantity input module of the controller of the safety diagnostic apparatus for detecting a hydraulic equipment fault through current collection in accordance with the embodiment of the present utility model;
FIG. 5 is a circuit diagram of a first portion of a digital quantity output module of a controller of a safety diagnostic apparatus for detecting a hydraulic equipment fault through current collection according to an embodiment of the present utility model;
FIG. 6 is a circuit diagram of a second portion of the digital quantity output module of the controller of the safety diagnostic apparatus for detecting a hydraulic equipment failure through current collection in accordance with the embodiment of the present utility model;
fig. 7 is a circuit diagram of a contactor control portion of a controller of a safety diagnostic apparatus for detecting a malfunction of a hydraulic device through current collection according to an embodiment of the present utility model;
fig. 8 is a schematic diagram of a hydraulic system of an application of a safety diagnostic apparatus for detecting a malfunction of a hydraulic device by current collection according to an embodiment of the present utility model.
Reference numerals:
101. a current collection unit; 102. a data service gateway; 103. a local server; 104. an Ethernet switch; 201. a hydraulic pump driving motor; 202. a power supply; 203. a ground row; 204. and a controller.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
examples:
the safety diagnosis device for detecting the faults of the hydraulic equipment through current collection is applied to a hydraulic system, the hydraulic system comprises a controller 204 and a hydraulic pump driving motor 201, as shown in fig. 1, the safety diagnosis device comprises a current collection unit 101 and a local server 103, and the current collection unit 101 is arranged at an outlet end of the hydraulic pump driving motor 201;
in fig. 1, the power supply 202 of the system is also presented, with the ground of the power supply 202 being connected to the ground bank 203.
As shown in fig. 2, the system further includes a data service gateway 102, where the data service gateway 102 is connected to the current acquisition unit 101 and the controller 204 respectively, the data service gateway 102 is connected to the local server 103 through an ethernet switch 104, specifically, the data service gateway is connected to the current acquisition unit through a Serial1 port, the NET1 interface of the data service gateway 102 is connected to the controller, the NET2 interface of the data service gateway 102 is connected to the switch, and the communication protocol adopts TCP/IP.
When the safety diagnosis device for detecting the faults of the hydraulic equipment through current collection is used, the current collection unit 101 detects the current of the outlet end of the hydraulic pump driving motor 201 in the hydraulic system, detects the current change value of the hydraulic pump driving motor in real time, transmits current data to the local server 103 through the data service gateway 102 and the Ethernet switch 104, simultaneously, when the controller 204 in the hydraulic system controls each element in the hydraulic system, the transmitted control signals and feedback signals are transmitted to the local server 103 through the data service gateway 102 and the Ethernet switch 104, and the local server 103 analyzes possible faults in the hydraulic system and displays a man-machine interaction interface of the local server 103 through the combination of the current change of the hydraulic pump driving motor 201 and the signal analysis of the controller 204, thereby providing reference for technicians, facilitating the technicians to quickly find the faults and quickly locate the faults, and having important significance for improving the overall safety of the hydraulic system.
According to the safety diagnosis device, the current collection unit 101 is arranged to collect the current of the outlet end of the hydraulic pump driving motor 201 in the hydraulic system, the current change of the hydraulic pump driving motor 201 and the control signal and feedback signal of the controller 204 in the hydraulic system are transmitted to the local server 103 in real time through the data service gateway 102, the local server 103 performs safety diagnosis on the faults of equipment in the hydraulic system by analyzing the information, the diagnosis speed is high, the accuracy is high, and the safety of the hydraulic system is higher.
In another embodiment, as shown in FIG. 2, the controller 204 is a PLC controller 204 model S7300CPU315-2 DP.
The PLC 204 is selected to conveniently control valves and switches in the hydraulic system, and simultaneously, control feedback signals can be transmitted outwards, and the S7300CPU315-2DPPLC can be connected with a network interface through an interface conversion module, so that the PLC is convenient to connect with a data service gateway, and the requirements for control and signal transmission are met.
The local server reads and writes the PLC internal register data through the network interface.
In another embodiment, the current collection unit 101 includes a current transformer and a current collection module, and the current transformer is installed at an outlet end of the hydraulic pump driving motor.
The current of the outlet end of the hydraulic pump driving motor 201 is detected in real time through the current transformer, high-frequency sampling is adopted for current data, periodic calculation is carried out on the data in the current acquisition module, the calculation result is root mean square of the effective value of the current, and the current detection precision is high.
In this embodiment, the analysis process is further described, first, the hydraulic system applied by the device is shown in fig. 8, where the hydraulic system is hydraulic equipment of the drilling top drive device, where the schematic of the braking portion is shown at a position a, the schematic of the balancing portion is shown at B, the schematic of the turret portion is shown at C, the schematic of the back-up wrench portion is shown at D, the schematic of the hydraulic elevator portion is shown at E, the schematic of the tilt cylinder portion is shown at F, and the schematic of the IBOP valve portion of the blowout preventer is shown at G in fig. 8.
As shown in fig. 3, the hydraulic pump start switch SB1 is connected to the I0.0 port of the controller 204, the hydraulic pump stop switch SB2 is connected to the I0.1 port of the controller 204, the blowout preventer IBOP valve left switch SA1 is connected to the I0.3 port of the controller 204, the blowout preventer IBOP valve right switch SA2 is connected to the I0.4 port of the controller 204, the left tilt switch SB3 is connected to the I0.6 port of the controller 204, and the right tilt switch SB4 is connected to the I0.7 port of the controller 204.
As shown in fig. 4, the back-up clamp switch SB5 is connected to the I1.0 port of the controller 204, the back-up clamp release switch SB6 is connected to the I1.1 port of the controller 204, the turret forward switch SB7 is connected to the I1.2 port of the controller 204, the turret reverse switch SB8 is connected to the I1.3 port of the controller 204, the up-jump switch SB9 is connected to the I1.4 port of the controller 204, the brake switch SB10 is connected to the I1.5 port of the controller 204, the brake release switch SB11 is connected to the I1.6 port of the controller 204, and the brake pump start signal feedback contactor KM1 is connected to the I1.7 port of the controller 204.
As shown in fig. 5, the Q0.0 port of the controller 204 is connected to the contactor control relay KA1, the Q0.1 and Q0.2 ports of the controller 204 are respectively connected to the YV1 and YV2 solenoid valves of the blowout preventer IBOP valve, the Q0.3 and Q0.5 ports of the controller 204 are respectively connected to the YV3 and YV4 solenoid valves of the tilt control valve, and the Q0.6 and Q0.7 ports of the controller 204 are respectively connected to the YV5 and YV6 solenoid valves of the back-up clamp control valve.
As shown in fig. 6, the Q1.0 and Q1.1 ports of the controller 204 are respectively connected to the YV7 solenoid valve and the YV8 solenoid valve of the turret control valve, the Q1.2 port of the controller 204 is connected to the YV9 solenoid valve of the skip control valve, and the Q1.4 and Q1.5 ports of the controller 204 are respectively connected to the YV11 solenoid valve and the YV12 solenoid valve of the brake control valve.
As shown in fig. 1, a main breaker QF1 is disposed at the outlet end of the main power supply 202, an air switch QF2, a contactor KM1 and a protection relay FR1 are also connected to the outlet end of the hydraulic pump driving motor 201, and as shown in fig. 8, a relay KA1, a protection relay FR1 and a contactor KM1 connected to the controller 204 are sequentially disposed on a circuit controlled by the contactor.
The specific analytical procedure is exemplified as follows: when the top drive does not have hydraulic action, the pump runs in a low-pressure state, the current is the lowest at the moment, when the hydraulic action exists, the pressure is built through reversing of the electromagnetic valve of the blowout preventer, the pump runs in a high-pressure state, and the current is the highest at the moment;
normally, when there is an operation, the current increases from 8A to 10A, the current increases to 12A after stopping, the Q point has an output (Q0.1/Q0.2=1), the Q point corresponding to each system is shown in the following graph, and the Q point after 15S decreases to 8A, if the current does not change, but the Q point output is present, the blowout preventer hydraulic failure is reported, Q1.0/Q1.1 is checked, Q1.0/Q1.1 output is obtained according to I0.3 and I0.4=1 blowout preventer on signals, and if the Q1.0/Q1.1 is not connected with blowout preventer off signals, the blowout preventer electromagnetic valve is checked.
If the current is directly increased from 8A to 12A, Q1.0/Q1.1=1 and Q1.0/Q1.1=1, the solenoid valve of the rotary head is judged to be non-operated at the moment, the hydraulic fault of the rotary head is reported, and the solenoid valve YV7/YV8 (inside positive and outside negative) is checked.
If the current is directly increased from 8A to 12A, Q0.5/Q0.3=1 and Q1.0/Q1.1=1, the tilting solenoid valve is judged to be not operated at the moment, and the hydraulic fault of the rotary head is reported to check YV3/YV4 (front inside and rear outside).
It will be appreciated that the above example is only one example, and that the utility model is applicable to other hydraulic systems and analysis processes are not identical.
In another embodiment, the current collection module is model HY02-06.
In another embodiment, the current transformer is model HL47.
HL47 acquisition sensitivity is high, accuracy is high, and current measurement range is 0-15A.
In another embodiment, as shown in fig. 1 and 2, the current collection unit 101 is connected to the data service gateway 102 through an RS485 communication cable, and the communication protocol adopts ModbusRTU.
The RS485 communication mode adopts twisted pair, differential signals are adopted for transmission, the field is convenient to arrange, the technology is mature, the stability and the safety are high, the current data transmission period is 500ms, and the data detection response is faster.
In another embodiment, as shown in fig. 2, the controller 204 is connected to the data service gateway 102 through a profibus dp to ethernet interface module.
In another embodiment, the ProfibusDP to ethernet interface module model BCNET-S7300.
In another embodiment, the data service gateway is of a model HY01-02N-04S, and supports ModbusRTU, modbusTCP/IP protocol and TCP/IP conversion and communication data forwarding.
The PLC is connected with the gateway through a ProfibusDP-Ethernet interface module. The gateway data are transmitted to a local server through an NET2 interface and an Ethernet switch, the communication protocol adopts TCP/IP, the communication data comprise root mean square of current effective values and real-time states of I/O points of the PLC, the local server reads internal registers of the PLC through installing an SCADA system, the states and logic relations of the hydraulic elements of the current equipment are reflected, data analysis is carried out on the current data and logic states of a PLC controller, and the current operation and fault states of the hydraulic system are reflected through a display interface.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (9)
1. The safety diagnosis device is applied to a hydraulic system, and the hydraulic system comprises a controller and a hydraulic pump driving motor and is characterized by comprising a current acquisition unit and a local server, wherein the current acquisition unit is arranged at an outlet end of the hydraulic pump driving motor;
the system also comprises a data service gateway which is respectively connected with the current acquisition unit and the controller, and the data service gateway is connected with the local server through an Ethernet switch.
2. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device through electric current collection according to claim 1, wherein the controller is a PLC controller of model S7300CPU315-2 DP.
3. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device through current collection according to claim 1, wherein the current collection unit comprises a current transformer and a current collection module, the current transformer being installed at an outlet terminal of a hydraulic pump driving motor.
4. A safety diagnostic apparatus for detecting a malfunction of a hydraulic device by electric current collection according to claim 3, wherein the model of the electric current collection module is HY02-06.
5. A safety diagnostic apparatus for detecting a malfunction of a hydraulic device by current collection according to claim 3, wherein the current transformer is model HL47.
6. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device through current collection according to claim 2, wherein the controller is connected to a data service gateway through a profibus dp to ethernet interface module.
7. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device via electrical current collection according to claim 6, wherein said ProfibusDP to ethernet interface module model BCNET-S7300.
8. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device through electric current collection according to claim 1, wherein the model number of the data service gateway is HY01-02N-04S.
9. The safety diagnostic apparatus for detecting a malfunction of a hydraulic device through current collection according to claim 1, wherein the current collection unit is connected to a data service gateway through an RS485 communication cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320178736.2U CN219345140U (en) | 2023-02-01 | 2023-02-01 | Safety diagnosis device for detecting faults of hydraulic equipment through current collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320178736.2U CN219345140U (en) | 2023-02-01 | 2023-02-01 | Safety diagnosis device for detecting faults of hydraulic equipment through current collection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219345140U true CN219345140U (en) | 2023-07-14 |
Family
ID=87106048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320178736.2U Active CN219345140U (en) | 2023-02-01 | 2023-02-01 | Safety diagnosis device for detecting faults of hydraulic equipment through current collection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219345140U (en) |
-
2023
- 2023-02-01 CN CN202320178736.2U patent/CN219345140U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111638051B (en) | On-line monitoring and fault pre-judging method for state of disconnecting link | |
| CN202794979U (en) | Intelligent supercharging water supply remote monitoring system | |
| CN106571689B (en) | Multi-data-source comparison technology diagnosis substation telemetry fault online monitoring system | |
| CN101661080B (en) | Power transformer on load tap changer contact fall off failure diagnosis method | |
| CN201134815Y (en) | Ethernet data acquisition and transmission system | |
| CN219345140U (en) | Safety diagnosis device for detecting faults of hydraulic equipment through current collection | |
| CN109116225A (en) | A kind of circuit breaker multichannel Durable test system | |
| KR101171884B1 (en) | Mornitoring device for serial communication interface | |
| CN111578145A (en) | Branching metering control device and system capable of reducing natural gas metering transmission difference | |
| CN218209055U (en) | Remote testing device and system for gas early warning system | |
| CN208723925U (en) | A kind of PROFINET on-Line Monitor Device | |
| CN108563189B (en) | Machine tool electrical fault diagnosis system | |
| CN203930476U (en) | A kind of engine room orders transmission peculiar to vessel and actuating unit | |
| CN200982991Y (en) | A detection device for motorcar electronic product | |
| CN116668227A (en) | Wiring method of field bus | |
| CN2717569Y (en) | Intelligent semisolid die forging hydraulic press complete equipment control system | |
| CN212840734U (en) | Controller and control system for natural gas branching measurement | |
| CN206348649U (en) | A kind of pneumoelectric Automated condtrol platform | |
| CN1354539A (en) | Intelligent remote monitoring system of transformer of distribution system | |
| CN113267711A (en) | On-line monitoring system and monitoring method for insulation state of high-voltage electrical equipment of transformer substation | |
| CN216772257U (en) | PLC cement mill multisensor inspection device | |
| CN113175552A (en) | Electric gate valve opening control system and method based on displacement | |
| CN112676023A (en) | Network construction method for coal mill control system | |
| CN219552639U (en) | Electric energy meter detection device | |
| CN110764483A (en) | Valve wireless measurement and control method and system based on cloud SCADA |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |