CN2872756Y - On-site bus valve controller - Google Patents
On-site bus valve controller Download PDFInfo
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- CN2872756Y CN2872756Y CN 200520134573 CN200520134573U CN2872756Y CN 2872756 Y CN2872756 Y CN 2872756Y CN 200520134573 CN200520134573 CN 200520134573 CN 200520134573 U CN200520134573 U CN 200520134573U CN 2872756 Y CN2872756 Y CN 2872756Y
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- valve
- communication interface
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Abstract
The utility model discloses a field bus valve controller, which comprises communication protocol chip circuit, communication interface circuit, feedback signal input circuit, and control signal output circuit all connected with power supply circuit. The communication protocol chip circuit includes protocol chip containing micro-controller circuit. The power supply circuit is also connected with detection circuit of LED indication voltage to provide power. The feedback signal input circuit and control signal output circuit are connected with a protocol chip provided with a corresponding I/O port, and also connected with electric execution mechanisms of electric/pneumatic valves provided with corresponding I/O ports. The communication protocol chip circuit is also respectively connected with restoring circuit, crystal oscillation circuit, and communication address and chip character configuration circuit. The communication interface circuit is connected to the communication protocol chip circuit and two RS485 buses. The utility model has high automation degree and reliability; and can realize remote communication and control capable of monitoring closed/opened state of industrial field valve.
Description
Technical field
The utility model relates to the bus valve positioner, relates in particular to a kind ofly to monitor the communication of industry spot valve open and close state and the fieldbus valve positioner of control by remote mode.
Background technology
Because the leakage of hazardous chemicals or gas, the operation of the technical process in many technical processs, especially chemistry or oil/gas industry all relate to inherent risk.These industry spot relate to final control element, as quick action emergency valve, urgent exhaust-valve, emergency isolation valve, crucial close/open valve etc.These valves require to be still in a certain position, when having only emergency to occur, just need action reliably.Yet the situation that existing artificial mode opens and closes valve may produce dangerous situation like this, causes exploding, fire or fatal chemicals and gas releases in the environment.In order to ensure the reliability and the utilizability of these safety system indispensabilities, must adopt a kind of reliable fashion of automation to control.On the July 31 calendar year 2001 applying date, patent No. ZL 01248916 Chinese utility model patent " valve positioner " discloses a kind of valve positioner, is particularly suitable for the control of gas source.It comprises control box, is equipped with timer on control box, is built-in with control circuit at control box, and the axle head of motor is connected with input shaft of speed reducer, and the output shaft of decelerator is connected with valve, on the housing of decelerator limitation travel switch is set.This valve positioner, valve is in closed condition at ordinary times, when starting timer, valve opening, limitation travel switch limits the limit travel position, and when timer regularly finished, valve closing was in maximum travel position.Have advantages such as easy to use, safe and reliable.But this situation that valve positioner automaticity is low, unfailing performance is not enough.
Summary of the invention
Technical problem to be solved in the utility model is at above-mentioned deficiency, and automaticity height, fieldbus valve positioner that unfailing performance is good are provided.The communication and the control of industry spot valve open and close state is monitored in realization by remote mode.QDF series controller and information transmitter circuit are in conjunction with advanced person's microprocessing, high integrated IC chip and long-life power-ourput device, reception is from the feedback signal of on-the-spot electromagnetically operated valve with by the conditioning signal of PROFIBUS-DP bus reception from upper PC, output " opening " and " pass " signal is realized control and adjusting to valve switch.Can be reliable, stable, adjustment structure such as by-pass valve control accurately.Can be widely used in fields such as generating, metallurgy, oil, chemical industry.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: the fieldbus valve positioner comprises the communications protocol chip circuit, communication interface circuit, time news signal input circuit, the control signal output circuit that are connected with power circuit; The technical measures of taking comprise: the communications protocol chip circuit comprises the protocol chip that contains microcontroller circuit; Power circuit also connects and provides power supply to detecting LED instructed voltage testing circuit; Return the news signal input circuit and be connected protocol chip, and also connect electrically operated valve, operated pneumatic valve electric operator with corresponding input interface and output interface with corresponding input interface and output interface with the control signal output circuit; The communications protocol chip circuit also connects reset circuit, crystal oscillating circuit, address and chip features word configuration circuit respectively; The communication interface circuit is connected to the communications protocol chip circuit and is connected to two-way RS485 bus.
Concrete technical measures also comprise:
The communications protocol chip circuit is LSPM2; The communication interface circuit comprises special chip MAX485; Return the news signal input circuit and comprise light lotus root TP521; The control signal output circuit comprises triode S9013; Reset circuit is special chip MAX810; Protocol chip receives control signal from computer through the communication interface circuit, control the switch of electrically operated valve, operated pneumatic valve electric operator by control control signal output circuit, and, its state is fed back to computer by the communication interface circuit through returning the state of news signal input circuit inquiry electrically operated valve, operated pneumatic valve.
2,3, No. 4 pins of protocol chip are connected 1,4, No. 3 pin of communication interface circuit special chip MAX485, and 6, No. 7 pins of protocol chip connect on the RS485 bus by resistance R 22, and No. 3 pin of described protocol chip are the control pin; The resulting input signal of RS485 obtains the high-low level signal by protocol chip, and passes to the protocol chip internal register by No. 4 pins of protocol chip.
The input that returns the news signal input circuit and be photoelectric coupling circuit connects the input of signal by resistance R 18, No. 16 pins of the described protocol chip of output termination of photoelectric coupling circuit, and the high-low level state can be saved in the chip internal register on the pin.
The control signal output circuit is that the PA0 mouth of described protocol chip connects on the input pin of photoelectric coupling circuit U4, and the output pin of light lotus root U4 connects the base stage of triode T1 by diode D4, and T1 amplifies signal through triode, drive controlling relay control output.
The communication interface circuit provides interface to link to each other with outside RS485 bus, and the cross-over connection of bus port place has terminal resistance.
Compared with prior art, circuit part of the present utility model can be divided into three big modules: communication part, control section, time news part.The communications protocol chip circuit that adopts comprises the protocol chip that contains microcontroller circuit; Power circuit also connects and provides power supply to detecting LED instructed voltage testing circuit; Return the news signal input circuit and be connected protocol chip, and also connect electrically operated valve, operated pneumatic valve electric operator with corresponding input interface and output interface with corresponding input interface and output interface with the control signal output circuit; The communications protocol chip circuit also connects reset circuit, crystal oscillating circuit, address and chip features word configuration circuit respectively; The communication interface circuit is connected to the communications protocol chip circuit and is connected to two-way RS485 bus.This specialized protocol conversion chip of LSPM2 is adopted in communication, cooperates corresponding GSD file to be articulated in easily in the PROFIBUS-DP network.Control section adopts the state variation of the delivery outlet line of LSPM2 to realize, mouth line output state is low during valve closing, when receiving the order of opening that PC assigns, the mouth line states is from the low height that becomes, move by triode amplifying signal energy drives electromagnetic relay, make the outside often open node and become closure, the valve power turn-on makes valve be in opening.Valve conducting simultaneously drives valve and returns the news electromagnetic relay and become closure from often opening, and the signal that collects through information transmitter is sent into the input port line of LSPM2 after isolating by photoelectricity.Pass to PC by the PROFIBUS-DP bus again, valve state is reflected in real time.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of Fig. 1;
Fig. 3 is the principal diagram intention of returning the news signal input circuit among Fig. 1, Fig. 2;
Fig. 4 is the principle schematic of control signal output signal among Fig. 1, Fig. 2;
Fig. 5 is the schematic diagram of communication interface circuit among Fig. 1, Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, Fig. 1 is the circuit block diagram of the utility model embodiment, and the fieldbus valve positioner comprises the communications protocol chip circuit, communication interface circuit, time news signal input circuit, the control signal output circuit that are connected with power circuit; The technical measures of taking comprise: the communications protocol chip circuit comprises the protocol chip that contains microcontroller circuit; Power circuit also connects and provides power supply to detecting LED instructed voltage testing circuit; Return the news signal input circuit and be connected protocol chip, and also connect electrically operated valve, operated pneumatic valve electric operator with corresponding input interface and output interface with corresponding input interface and output interface with the control signal output circuit; The communications protocol chip circuit also connects reset circuit, crystal oscillating circuit, address and chip features word configuration circuit respectively; The communication interface circuit is connected to the communications protocol chip circuit and is connected to two-way RS485 bus.The communication interface circuit provides interface to link to each other with outside RS485 bus, and the cross-over connection of bus port place has terminal resistance.
As shown in Figure 2, Fig. 2 is the circuit theory diagrams of Fig. 1, and the communications protocol chip circuit comprises LSPM2; Return the news signal input circuit and comprise photo coupler spare TP521; The control signal output circuit comprises photo coupler spare TP521, triode S9013, diode 1N4001; The communication interface circuit comprises special chip MAX485; Reset circuit comprises special chip MAX810; The signal of the by-pass valve control folding of passing through the transmission of communication interface circuit of protocol chip receiving computer, come the by-pass valve control folding according to driving relay by the control signal output circuit accordingly, return news signals collecting valve signal and send protocol chip to, feed back to computer by the communication interface circuit then.
As shown in Figure 3, Fig. 3 is the principal diagram intention of returning the news signal input circuit among Fig. 1, Fig. 2, return the news signal input circuit and comprise photo coupler that model is TLP521 and resistance R 18, R24, input signal is input to the input of photo coupler by resistance R 18, isolates No. 16 pin that the back output signal arrives protocol chip through TLP521; When external input signal is high level, the conducting of light lotus root, output signal Signal1 is a high level, when external input signal is low level, the light lotus root is a blocking state, and output signal Signal1 is influenced by pull down resistor R24, and level is low, input signal and output state signal are synchronous, finish back the input of news signal.
As shown in Figure 4, Fig. 4 is the principle schematic of control signal output signal among Fig. 1, Fig. 2, and the control signal output circuit comprises photo coupler TLP521, diode 1N4004, triode S9013, resistance R 20, resistance R 16, capacitor C 8; Control signal CON1 is input to optical coupler, when signal is high level, and the photo coupler conducting, diode D4 is input as height, diode current flow, transistor base are high, the triode conducting, relay coil gets electric adhesive, and external valve control motor gets electric, drives valve open; When signal is low level, the optical coupler blocking-up, transistor base is low, relay coil does not have electricity, external valve control motor dead electricity, valve closing.Diode D3 provide damping action, absorbs the relay back electromotive force.
As shown in Figure 5, Fig. 5 is the schematic diagram of communication interface circuit among Fig. 1, Fig. 2, and the communication interface circuit comprises MAX485, resistance R 5, R14, R22; MAX485 links to each other with protocol chip by RXD, TXD, RTS, No. 6, No. 7 pin links to each other with the RS485 bus by resistance R 22, terminal resistance R14 is connected across on the RS485 bus, when protocol chip need instead send data, this moment, RTS was a high level, made MAX485 be in transmit status, and signal condition passes to MAX485 by TXD, be reflected on the RS485 bus through level conversion, send back RTS and be returned to low level state.When there is the signal input outside, carry out level conversion by RS485, be delivered to protocol chip by the RXD pin, finishing communication signal must transmit.
This specialized protocol conversion chip of LSPM2 is adopted in communication, cooperates corresponding GSD file to be articulated in easily in the PROFIBUS-DP network.Control section adopts the state variation of the delivery outlet line of LSPM2 to realize, mouth line output state is low during valve closing, when receiving the order of opening that PC assigns, the mouth line states is from the low height that becomes, move by triode amplifying signal energy drives electromagnetic relay, make the outside often open node and become closure, the valve power turn-on makes valve be in opening.Valve conducting simultaneously drives valve and returns the news electromagnetic relay and become closure from often opening, and the signal that collects through information transmitter is sent into the input port line of LSPM2 after isolating by photoelectricity.Pass to PC by the PROFIBUS-DP bus again, valve state is reflected in real time.
Though the utility model illustrates and describes by the reference preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.
Claims (6)
1, fieldbus valve positioner comprises the communications protocol chip circuit, communication interface circuit, time news signal input circuit, the control signal output circuit that are connected with power circuit; It is characterized in that: described communications protocol chip circuit comprises the protocol chip that contains microcontroller circuit; Described power circuit also connects and provides power supply to detecting LED instructed voltage testing circuit; Described time the news signal input circuit is connected the protocol chip with corresponding input interface and output interface with the control signal output circuit, and also connects electrically operated valve, the operated pneumatic valve electric operator with corresponding input interface and output interface; Described communications protocol chip circuit also connects reset circuit, crystal oscillating circuit, address and chip features word configuration circuit respectively; Described communication interface circuit is connected to described communications protocol chip circuit and is connected to two-way RS485 bus.
2, fieldbus valve positioner according to claim 1 is characterized in that: described communications protocol chip circuit is LSPM2; Described communication interface circuit comprises special chip MAX485; Described time the news signal input circuit comprises light lotus root TP521; Described control signal output circuit comprises triode S9013; Described reset circuit is special chip MAX810; Described protocol chip receives control signal from computer through described communication interface circuit, control the switch of electrically operated valve, operated pneumatic valve electric operator by controlling described control signal output circuit, and inquire about the state of described electrically operated valve, operated pneumatic valve through described time news signal input circuit, by the communication interface circuit its state is fed back to computer.
3, fieldbus valve positioner according to claim 1 and 2, it is characterized in that: 2,3, No. 4 pins of described protocol chip connect 1,4, No. 3 pin of described communication interface circuit special chip MAX485,6, No. 7 pins of described protocol chip connect on the RS485 bus by resistance R 22, and No. 3 pin of described protocol chip are the control pin; The resulting input signal of described RS485 obtains the high-low level signal by described protocol chip, and passes to the protocol chip internal register by No. 4 pins of described protocol chip.
4, fieldbus valve positioner according to claim 2, it is characterized in that: described time the news signal input circuit is the input of photoelectric coupling circuit connects signal by resistance R 18 input, No. 16 pins of the described protocol chip of output termination of photoelectric coupling circuit, the high-low level state can be saved in the chip internal register on the pin.
5, fieldbus valve positioner according to claim 2, it is characterized in that: the PAO mouth that described control signal output circuit is described protocol chip connects on the input pin of photoelectric coupling circuit U4, the output pin of light lotus root U4 connects the base stage of triode T1 by diode D4, T1 amplifies signal through triode, drive controlling relay control output.
6, fieldbus valve positioner according to claim 1 is characterized in that: described communication interface circuit provides interface to link to each other with outside RS485 bus, and the cross-over connection of bus port place has terminal resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520134573 CN2872756Y (en) | 2005-12-31 | 2005-12-31 | On-site bus valve controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520134573 CN2872756Y (en) | 2005-12-31 | 2005-12-31 | On-site bus valve controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2872756Y true CN2872756Y (en) | 2007-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520134573 Expired - Fee Related CN2872756Y (en) | 2005-12-31 | 2005-12-31 | On-site bus valve controller |
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| Country | Link |
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| CN (1) | CN2872756Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359638A (en) * | 2011-08-13 | 2012-02-22 | 黄山良业阀门有限公司 | Valve electric device for field bus and wireless control |
| CN101719922B (en) * | 2009-12-04 | 2012-11-14 | 上海交通大学 | Device and method of protocol conversion between PROFIBUS-DP industrial fieldbus and wireless ZIGBEE |
| CN107688306A (en) * | 2016-08-04 | 2018-02-13 | 重庆节节高科技发展有限公司 | A kind of remote control module for safety means detection |
-
2005
- 2005-12-31 CN CN 200520134573 patent/CN2872756Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719922B (en) * | 2009-12-04 | 2012-11-14 | 上海交通大学 | Device and method of protocol conversion between PROFIBUS-DP industrial fieldbus and wireless ZIGBEE |
| CN102359638A (en) * | 2011-08-13 | 2012-02-22 | 黄山良业阀门有限公司 | Valve electric device for field bus and wireless control |
| CN107688306A (en) * | 2016-08-04 | 2018-02-13 | 重庆节节高科技发展有限公司 | A kind of remote control module for safety means detection |
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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 |