CN2781162Y

CN2781162Y - Radio controller for oil gas pipeline control valve

Info

Publication number: CN2781162Y
Application number: CN 200420057740
Authority: CN
Inventors: 喻道远; 李培根; 张铮; 李朝晖
Original assignee: Huazhong University of Science and Technology
Current assignee: Huazhong University of Science and Technology
Priority date: 2004-12-13
Filing date: 2004-12-13
Publication date: 2006-05-17
Anticipated expiration: 2014-12-13

Abstract

The utility model relates to a radio controller for oil gas pipeline control valves, which belongs to the radio controller. Aiming at the special operation environment and control conditions of the oil gas pipeline control valves, the utility model adopts a radio data transmission control mode to satisfy the requirement of a remote monitoring system. An A/D converting module of the utility model is connected with an electrical signal of a PLC module; a data transmission station is connected with the PLC module by a 485 interface module; a switching power supply and a power amplification module are matched with the data transmission station; the A/D converting module controls on-site pressure and temperature signal collection, carries out A/D converting and then input the PLC module to detect and to process; the signal detected by the PLC module is transmitted to a supervisory computer of a monitoring center by the data transmission station which receives control order from the supervisory computer of the monitoring center to control a valve gate station. The utility model intensively manages to dispersive oil-gas pipeline networks, and realizes data collection, reverse control, failure diagnosis and remote actuation to the equipment and the state of the surrounding environment of the oil gas pipeline network; the utility model has the functions of remote measurement, remote control, automatic alarm, etc.

Description

Oil and gas pipes control valve wireless controller

Technical field

The utility model belongs to control device of wireless, is used for oil and gas pipes control valve remote monitoring.

Background technique

The large-caliber gas-oil pipeline valve is the large-scale key foundation equipment of the remote transfer oil of pipeline, rock gas, has by multiple functions such as, unlatching, dispensing and pressure regulation, also is the visual plant that guarantees normal operation of pipe-line and safety protection.Be guaranteeing equipment proper functioning, resource security transportation and personnel's life safety, is a long-term and important job to the complete monitoring of oil and gas pipes and valve.Therefore the large-caliber gas-oil pipeline valve generally all is installed on the countryside away from the city, and physical environment is comparatively abominable, all adopts unmanned basically, the mode of making an inspection tour of regularly dispatching officers.

The oil and gas pipes long distance control system is the system of a cover at the data capture and the valve control of valve state in the oil-gas pipeline and pipe parameter, can handle being sent to the remote monitoring center computer in the parameter sets such as oil gas flow, pressure, temperature in the pipeline, to realize functions such as demonstration, printing, storage, warning, control and drafting historical record curve, a large amount of recorders, digital display meter have been saved, both reduced cost of investment, and can make the data of collection more directly perceived again, accurate, reliable.When system was in the remote monitoring state, the operator can directly carry out remote monitoring and control to each valve station in Surveillance center, in time understands the variation and the development trend of ducted temperature, pressure and other parameters, grasps the influence of each parameter to the oil gas transfer efficiency.Because programmable logic controller (PLC) PLC is built-in with monitor program, when the valve station is in an emergency, PLC can not need Surveillance center instruction directly to open or close valve, has reduced the danger that time delay or communication failure because of the radio station bring, and has strengthened the reliability of system; The automatic record of key parameter in the system is realized automatic open and close valve according to the parameter that is provided with, and reports to the police automatically, avoids manual intervention, significantly reduces the possibility that the operation misoperation causes accident, the Security that improves system.

Long distance control system can adopt a lot of modes, can build private network, draw special line, utilize general packet radio service gprs (General Packer Radio Service) or CDMA CDMA (Code Division Multiple Access), but these modes exist all that initial outlay is big, operating cost is high or problem such as maintainable difference.Through data-searching, find that large-caliber gas-oil pipeline valve remote monitoring did not also adopt the wireless data sending control mode, relatively screen through scheme simultaneously, think that the wireless data sending pattern can satisfy the requirement of system at aspects such as data capture, field control, data updating rates, and investment and operating cost is low, portable good, non-maintaining.

Summary of the invention

The utility model provides a kind of oil and gas pipes control valve wireless controller, at oil and gas pipes control valve special running environment and controlled conditions, adopts the wireless data sending control mode, satisfies the requirement of oil and gas pipes long distance control system.

A kind of oil and gas pipes control valve wireless controller of the present utility model comprises A/D modular converter, PLC module, 485 Interface Modules, data radio station, switch power and power amplifier module; A/D modular converter and PLC modular telecommunications number link to each other, and data radio station links to each other with the PLC module by 485 Interface Modules, and switch power and power amplifier module are disposed at data radio station to satisfy the requirement of the remote data transmission of system; The A/D modular converter is from control collection in worksite pressure, temperature signal and carry out the A/D conversion, imports the PLC module again and detects processing; Data radio station is sent to Surveillance center's upper-position unit with the detected signal of PLC module, receives control command from Surveillance center's upper-position unit simultaneously, and the valve station is controlled.

The utility model is from control collection in worksite pressure, temperature signal and carry out the A/D conversion, detect valve opening, close, reach the position, close put in place, promote put in place, descending puts in place and signals such as moment are crossed in the valve open and close, and detected signal is sent to Surveillance center's upper-position unit by data radio station, also receive control command from Surveillance center's upper-position unit simultaneously, the valve station is controlled by data radio station.

The utility model is optimized data chainning according to the concrete condition of equipment such as upper-position unit, data radio station and PLC, make system have unified numeric data code type, simultaneously determined data transfer rate, guaranteed the stable, reliable of the utility model data transmission according to refresh requirement, data delay and the wireless telecommunications bit error rate of system.

At bad working environment, the utility model has carried out particular design aspect structure and heat radiation, and the sensor at control scene, the explosive-proof grade of position limit switch are Exed II CT4, and security level is more than IP56.

The point-to-multipoint wireless data sending mode that adopts the utility model has realized collection, supervision and the control to valve station teledata.The method that the utility model provides can also press the station to realize centralized management to the oil gas pipe network, base station, the commentaries on classics that extremely disperse, interchange high and low pressure controller switching equipment to the oil gas pipe network, control cabinet, intelligent instrument, air compressor, antitheft, the overvoltage of equipment such as valve sets and surrounding environment, leakage, power down mode carry out data capture, oppositely control, fault diagnosis, remote activation, make it to have remote measurement, remote control, function such as warning automatically.

Description of drawings

Fig. 1 is an oil and gas pipes long distance control system block diagram;

Fig. 2 is the utility model theory diagram;

Fig. 3 is embodiment's wiring diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

Figure 1 shows that oil and gas pipes long distance control system block diagram, this system is made up of Surveillance center's (upper-position unit), Surveillance center's digital transmission module, on-the-spot digital transmission module, control unit, input/output module, sensor groups and valve actuator, system adopts point-to-multipoint, multiaddress wireless network, forms a complete device monitoring and data capture SCADA (Supervisory Control AndData Acquisition) system.

Fig. 2 is the utility model theory diagram.The utility model belongs to lower-position unit in the oil and gas pipes long distance control system, constitute by A/D modular converter, PLC, 485 Interface Modules, data radio station, switch power and 25W power amplifier module, add peripheral temperature, pressure, torque transducer, limit switch group, valve driving circuit and antenna have just constituted a complete distant control subtense angle.

As shown in Figure 3, the utility model is selected the FX of Mitsubishi for use _2N-32MR type programmable controller is done the PLC control unit, and has expanded the 485BD communication interface module.Data radio station is selected the 2710C type data radio station of MDS company for use, setting emissino frequency TX is 230MHz, receive frequency RX is 235MHz, bandwidth 25kHz, and other is furnished with the built-in 25W power amplifier module of 2710P type and TDJ-230Y7 type directional antenna to satisfy the requirement of the remote data transmission of system.Data radio station links to each other with PLC by 232 ← → 485 transducers, because adopt the serial data chain pattern, all devices all should have identical data format in the chain, and 2710C type data radio station is not supported 7N1,8E2 and 802 these three kinds of sign indicating number types, so selected speed 9600bps, sign indicating number type 7E1.Messaging parameter register D8120 among the PLC is set to 8058, detailed meanings is as follows: agreement: Link, data bit: 7, verification: even parity check, position of rest: 1, Transmission bit rate: 9600, hardware: RS-485, number is checked: yes, and control: format4, and in station number register D8121, set the device address of PLC.

In the utility model, PLC passes through FX _2NThe CH1 of-4AD D/A converter module, CH2 link to each other with HT-806 type pressure transmitter with HT-130 type temperature transmitter respectively, gather the variation of oil and gas pipes temperature and pressure.Temperature, pressure transmitter operating voltage are DC24V, are output as 4～20mA, temperature measurement range-20～70 ℃, pressure measurement range 0～6MPa.For satisfying the harsh requirement of environment, temperature, pressure transmitter are all selected the flame-proof type product for use, and explosive-proof grade is Exed II CT4, and security level is IP56.

SA is the control mode selector switch among the figure, PLC of the present utility model detects the state of X0 and X1 input port, judge and carry out on the spot that control program still is the instruction of Surveillance center, but under two kinds of patterns, PLC is sent to Surveillance center with the state and the data at scene, and PLC will carry out the emergency treatment program when overtemperature, overvoltage occurring and cross urgency such as moment.PLC receives the control signal of Surveillance center's instruction or local SB1～SB3, detect simultaneously that valve reaches a SOD, closes the SOC that puts in place, promotes the SOD1 that puts in place, position limit switch such as SOC1 and valve were opened moment STD, closed moment STC, air door operation BL and pressure, the temperature transducer of putting in place descends, signaling lamp HL1～HL6 indicates corresponding working state, and finishes corresponding task by contactor KMO, KMC actuating valve door motor.Among Fig. 3, COM is the input common port of PLC, and COM0, COM1, COM2 are the output common port of PLC, and PE is the protective grounding of PLC.

The utility model working environment is comparatively harsh, and the heating of 2710C type data radio station is bigger, and heat dissipation problem is related to the stable operation of system, and the utility model has carried out special design aspect structure and fan control for this reason.Cabinet of the present utility model adopts the double fan design, two temp controller PCT1, the PCT2 of control fan FAN1, FAN2 are respectively 40 ℃ and 55 ℃, wind field influences radiating effect in order to avoid producing fixedly, the utility model in cabinet both sides rear design the butterfly radiation hole, the butterfly radiation hole has good turbulence effect, good through the experimental test radiating effect, satisfied the requirement of system.

Claims

1. an oil and gas pipes control valve wireless controller comprises A/D modular converter, PLC module, it is characterized in that it also comprises 485 Interface Modules, data radio station, switch power and power amplifier module; A/D modular converter and PLC modular telecommunications number link to each other, and data radio station links to each other with the PLC module by 485 Interface Modules, and switch power and power amplifier module are disposed at data radio station to satisfy the requirement of the remote data transmission of system; The A/D modular converter is from control collection in worksite pressure, temperature signal and carry out the A/D conversion, imports the PLC module again and detects processing; Data radio station is sent to Surveillance center's upper-position unit with the detected signal of PLC module, receives control command from Surveillance center's upper-position unit simultaneously, and the valve station is controlled.