CN213711898U - Valve opening control device - Google Patents
Valve opening control device Download PDFInfo
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- CN213711898U CN213711898U CN202022267611.6U CN202022267611U CN213711898U CN 213711898 U CN213711898 U CN 213711898U CN 202022267611 U CN202022267611 U CN 202022267611U CN 213711898 U CN213711898 U CN 213711898U
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- absolute value
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Abstract
The utility model provides a valve opening control device, which comprises a valve opening detection device, a control device and an execution device; the valve opening degree detection device comprises a pull-line type absolute value encoder, the pull-line type absolute value encoder comprises a pull-line box and an absolute value encoder, the stretching length of a pull line in the pull-line box is in direct proportion to the encoding value of the absolute value encoder, and the stretching end of the pull line is arranged on the valve; the control device comprises a main processor, an input/output module element electrically connected with the main processor and an electric control system connected with the input/output module element; the valve opening detection device is electrically connected with the input and output module element; the actuating device comprises an electric actuating mechanism which is arranged on the valve and controls the rotation direction of the valve, and the electric actuating mechanism is in signal connection with the electric control system. Utilize the utility model discloses can solve the great scheduling problem of actuating mechanism control error of present valve locator with high costs and switch type.
Description
Technical Field
The utility model belongs to the technical field of the valve, more specifically, relate to a valve aperture controlling means.
Background
In the production processes of mining, ore dressing and the like, a plurality of blanking valves are required to adjust the valve opening according to the downstream required material quantity, so that the valves are required to have an automatic adjusting function or a valve opening detecting function, closed-loop control can be formed, and the adjusting precision is improved.
At present, two situations often occur in field application, one is that the valves in mine production are generally heavy valves, the power is high, and the valve positioner is required to be configured for an adjusting type actuating mechanism, so the price is high; the other type is that a switch type actuating mechanism is installed in the past, the switch of the valve is controlled by the experience of an operator, the valve can be judged to be in a full-open state or a full-close state only according to a position switch of the valve, the opening degree of the valve is not accurately controlled between the full-open state and the full-close state, the valve belongs to open-loop control, and the error is large.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a valve opening control device to solve the problems of high cost of the existing valve positioner and large control error of the switch-type actuator.
The utility model provides a valve opening control device, which comprises a valve opening detection device, a control device and an execution device; the valve opening degree detection device comprises a pull-line type absolute value encoder, the pull-line type absolute value encoder comprises a pull-line box and an absolute value encoder, the stretching length of a pull line in the pull-line box is in direct proportion to the encoding value of the absolute value encoder, and the stretching end of the pull line is arranged on the valve; the control device comprises a main processor, an input/output module element electrically connected with the main processor and an electric control system connected with the input/output module element; the valve opening detection device is electrically connected with the input and output module element; the actuating device comprises an electric actuating mechanism which is arranged on the valve and controls the rotation direction of the valve, and the electric actuating mechanism is in signal connection with the electric control system.
In addition, it is preferable that a mounting bracket is provided at one side of the valve; the valve opening degree detection device is arranged on the mounting bracket.
In addition, it is preferable that the stretching end of the pulling rope is fixed to the valve by a fixing member; and when the opening of the valve is positioned on the central axis of the valve, the stretching length of the stretching rope is half of the total stretching length of the stretching rope.
In addition, preferably, the fixing member is a mounting bolt.
In addition, it is preferable that the electric control system includes a main circuit; the main circuit comprises a thermal relay connected with the electric actuating mechanism, and a forward contactor and a reverse contactor which are respectively connected with the thermal relay.
In addition, it is preferable that the electric control system further includes a control circuit connected to the main circuit of the valve; a manual-automatic change-over switch is arranged on the control circuit; the control circuit comprises a manual control circuit and an automatic control circuit which are respectively connected with the manual-automatic change-over switch; a manual forward switch connected with the forward contactor and a manual reverse switch connected with the reverse contactor are arranged on the manual control circuit; the automatic control circuit is provided with a forward rotation signal switch connected with the forward rotation contactor and a reverse rotation signal switch connected with the reverse rotation contactor, the forward rotation signal switch receives a forward rotation signal output by the input and output module element, and the reverse rotation signal switch receives a reverse rotation signal output by the input and output module element.
Preferably, a stop switch is provided in the manual control circuit.
In addition, it is preferable that a maximum limit switch and a minimum limit switch are provided in the control circuit.
According to the above technical scheme, the utility model provides a valve opening controlling means, through valve opening detection device, carries out real-time detection to the aperture of valve, because valve opening detection device includes the stay wire formula absolute value encoder, the stay wire formula absolute value encoder includes stay wire box and absolute value encoder, and the tensile length of stay cord is directly proportional with the coded value of absolute value encoder in the stay wire box, and the tensile end of stay cord sets up on the valve; consequently, the in-process at valve switch drives the stay cord motion to obtain the coded value that absolute value encoder and the tensile length of stay cord correspond, rethread input/output module component transmits the coded value for the host processor, compare the analysis to coded value and predetermined coded value through the host processor and generate control valve corotation and reversal's control signal, control signal transmits electrical system through input/output module component, electrical system controls the work of electric actuator, thereby control the aperture of valve, the utility model has the advantages of practice thrift the cost, to the aperture control precision height of valve.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
fig. 1 is a schematic structural view of a valve opening control device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an actuator according to an embodiment of the present invention.
In the figure, 1-stay absolute value encoder, 11-stay box, 12-absolute value encoder, 13-stay rope, 2-electric actuator, 3-control device, 4-electric control system, 41-main circuit, 411-forward contactor, 412-reverse contactor, 413-thermal relay, 42-control circuit, 421-manual change-over switch, 43-manual control circuit, 431-manual forward switch, 432-manual reverse switch, 433-stop switch, 44-automatic control circuit, 441-forward signal switch, 442-reverse signal switch, 5-mounting bracket, 6-fixing piece, 7-maximum limit switch, 8-minimum limit switch, 9-valve.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
The valve opening control device is provided for solving the problems that the valve positioner in the prior art is high in cost, the control error of an on-off actuating mechanism is large and the like.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to explain the valve opening degree control device provided by the present invention, fig. 1 shows the structure of the valve opening degree control device according to the embodiment of the present invention; fig. 2 shows a circuit of an actuator according to an embodiment of the present invention.
As shown in fig. 1, the valve opening control device provided by the present invention comprises a valve opening detection device, a control device 3 and an execution device; the valve opening degree detection device comprises a pull-wire type absolute value encoder 1, the pull-wire type absolute value encoder 1 comprises a pull-wire box 11 and an absolute value encoder 12, the stretching length of a pull rope 13 in the pull-wire box 11 is in direct proportion to the encoding value of the absolute value encoder 12, and the stretching end of the pull rope 13 is arranged on a valve 9; the control device 3 comprises a main processor, an input/output module element electrically connected with the main processor and an electric control system 4 connected with the input/output module element; the valve opening detection device is electrically connected with the input and output module element; the actuating device comprises an electric actuating mechanism 2 which is arranged on a valve 9 and controls the rotation direction of the valve 9, and the electric actuating mechanism 2 is in signal connection with an electric control system 4.
The control device 3 is preferably a PLC control system, which generally includes a processor and an I/O module.
The electric actuator 2 is preferably an electric motor, and may be replaced by other mechanisms capable of driving the valve 9 to rotate forward and backward by receiving a control signal from the electronic control system 4, and is not particularly limited herein.
The opening of the valve is detected in real time through a valve opening detection device, the valve opening detection device comprises a pull-wire type absolute value encoder, the pull-wire type absolute value encoder comprises a pull-wire box and an absolute value encoder, the stretching length of a stretching wire in the pull-wire box is in direct proportion to the encoding value of the absolute value encoder, and the stretching end of the stretching wire is arranged on the valve; consequently, the in-process at valve switch drives the stay cord motion to obtain the coded value that absolute value encoder and the tensile length of stay cord correspond, rethread input/output module component transmits the coded value for the host processor, compare the analysis to coded value and predetermined coded value through the host processor and generate control valve corotation and reversal's control signal, control signal transmits electrical system through input/output module component, electrical system controls the work of electric actuator, thereby control the aperture of valve, the utility model has the advantages of practice thrift the cost, to the aperture control precision height of valve.
As the preferred scheme of the utility model, a mounting bracket 5 is arranged on one side of the valve 9; the valve opening degree detection device is arranged on the mounting bracket 5. The fixed installation of the stay wire type absolute value encoder 1 is facilitated through the installation bracket 5.
As a preferable scheme of the utility model, the stretching end of the pulling rope 13 is fixed on the valve 9 through the fixing piece 6; and when the opening of the valve 9 is located at the central axis of the valve 9, the stretching length of the stretching rope 13 is half of the total stretching length of the stretching rope 13.
The stay wire type absolute value encoder 1 consists of a stay wire box 11 and a plurality of circles of absolute value encoders 12, the stay wire box 11 and the plurality of circles of absolute value encoders are required to be matched for use, the length of the stay wire 13 is in direct proportion to the encoding value of the absolute value encoders 12, the absolute value encoders 12 with certain resolution are selected, if the total length is 8192 and the resolution of each circle is 1024, the encoders are 8 circles, 4-20 mA signals are correspondingly drawn out from 0-8192, the stay wire 13 is drawn out to be connected with the proper position of the valve 9, when the valve 9 is positioned on the central axis of the valve 9, namely the opening of the valve 9 is 50%, the corresponding encoder has a value of 4096 and a corresponding current of 12mA, as the stay wire is arranged on the edge of the valve 9 and has a certain distance from the valve 9, the length of the stay wire 13 of the valve 9 cannot be equal to zero even in a fully closed state, therefore, a certain dead zone value is reserved when the installation position of the stay wire, for example, 1024, a certain dead zone value is also reserved at the fully opened position of the valve 9, and is equal to 1024, so that in the process that the valve 9 is fully opened to fully closed, the value of the stay wire type absolute value encoder 1 changes from 1024 to 7168, corresponding to 6-18 mA analog quantity signals, and when the value of the stay wire type absolute value encoder 1 is 4096, 12mA is output, corresponding to 50% of the opening degree of the valve 9. The stay wire type absolute value encoder 1 is connected to an I/O module of a PLC control system through a cable, and a detection signal of the opening degree of the valve 9 can be acquired in real time.
As the preferred scheme of the utility model, mounting 6 is the construction bolt. The mounting bolts are welded at appropriate positions of the valve 9 to facilitate connection of the pull rope 13 with the valve 9.
As shown in fig. 2, as a preferred embodiment of the present invention, the electronic control system 4 includes a main circuit 41; the main circuit 41 includes a thermal relay 413 connected to the electric actuator 2, and a normal rotation contactor 411 and a reverse rotation contactor 412 connected to the thermal relay 413, respectively.
The thermal relay 413 controls the load of the main circuit, and the forward contactor 411 and the reverse contactor 412 respectively drive the valve 9 to rotate forward and reverse by controlling the electric actuator 2.
As a preferred embodiment of the present invention, the electric control system 4 further includes a control circuit 42 connected to the main circuit 41 of the valve 9; a manual-automatic change-over switch 421 is provided on the control circuit 42; the control circuit 42 comprises a manual control circuit 43 and an automatic control circuit 44 which are respectively connected with the manual-automatic change-over switch 421; a manual forward switch 431 connected to the forward contactor 411 and a manual reverse switch 432 connected to the reverse contactor 412 are provided on the manual control circuit 43; the automatic control circuit 44 is provided with a forward rotation signal switch 441 connected to the forward rotation contactor 411 and a reverse rotation signal switch 442 connected to the reverse rotation contactor 412, the forward rotation signal switch 441 receives a forward rotation signal output from the input/output module element, and the reverse rotation signal switch 442 receives a reverse rotation signal output from the input/output module element.
Through the above design of the manual control circuit 43 and the automatic control circuit 44, the opening of the valve 9 can be manually controlled on site and the opening of the valve 9 can be automatically controlled remotely. When the manual-automatic change-over switch 421 is connected to the manual control circuit 43, the valve 9 is operated to rotate forward and backward by the manual forward switch 431 and the manual backward switch 432 in a local control mode; when the manual/automatic transfer switch 421 is connected to the automatic control circuit 44, an automatic control mode is adopted, and a signal capable of controlling the electric actuator 2 to drive the valve 9 to rotate in the forward direction and a signal capable of controlling the electric actuator 2 to drive the valve 9 to rotate in the reverse direction are generated through an output instruction from the control device 3, wherein the forward rotation signal switch 441 and the reverse rotation signal switch 442 are respectively a signal switch for controlling the electric actuator 2 to drive the valve 9 to rotate in the forward direction and a signal switch for controlling the electric actuator 2 to drive the valve 9 to rotate in the reverse direction, and the forward rotation signal switch 441 and the reverse rotation signal switch 442 are used for automatically controlling the forward rotation and the reverse rotation of the valve 9.
As a preferred embodiment of the present invention, the manual control circuit 43 is provided with a stop switch 433. The opening and closing of the manual control circuit 43 are controlled by a stop switch 433.
As a preferred embodiment of the present invention, the control circuit 42 is provided with a maximum limit switch 7 and a minimum limit switch 8. When the valve is rotated to the maximum limit position or the minimum limit position, the maximum limit switch 7 or the minimum limit switch 8 is actuated, thereby cutting off the circuit.
As a preferable scheme of the utility model, an operation box is arranged near the valve 9; the manual normal rotation switch 431, the manual reverse rotation switch 432, and the stop switch 433 are provided in the operation box. The operation box has the protective action to internal switch.
According to the specific embodiment, the valve opening detection device is used for detecting the opening of the valve in real time, the valve opening detection device comprises a pull-line type absolute value encoder, the pull-line type absolute value encoder comprises a pull-line box and an absolute value encoder, the stretching length of a pull rope in the pull-line box is in direct proportion to the encoding value of the absolute value encoder, and the stretching end of the pull rope is arranged on the valve; consequently, the in-process at valve switch drives the stay cord motion to obtain the coded value that absolute value encoder and the tensile length of stay cord correspond, rethread input/output module component transmits the coded value for the host processor, compare the analysis to coded value and predetermined coded value through the host processor and generate control valve corotation and reversal's control signal, control signal transmits electrical system through input/output module component, electrical system controls the work of electric actuator, thereby control the aperture of valve, the utility model has the advantages of practice thrift the cost, to the aperture control precision height of valve.
The valve opening control device according to the present invention is described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the valve opening control device provided in the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (8)
1. A valve opening control device is characterized by comprising a valve opening detection device, a control device and an execution device; wherein the content of the first and second substances,
the valve opening degree detection device comprises a pull-line type absolute value encoder, the pull-line type absolute value encoder comprises a pull-line box and an absolute value encoder, the stretching length of a pull line in the pull-line box is in direct proportion to the encoding value of the absolute value encoder, and the stretching end of the pull line is arranged on the valve;
the control device comprises a main processor, an input/output module element electrically connected with the main processor and an electric control system connected with the input/output module element; the valve opening detection device is electrically connected with the input and output module element;
the actuating device comprises an electric actuating mechanism which is arranged on the valve and controls the rotation direction of the valve, and the electric actuating mechanism is in signal connection with the electric control system.
2. The valve opening control apparatus according to claim 1,
a mounting bracket is arranged on one side of the valve;
the valve opening degree detection device is arranged on the mounting bracket.
3. The valve opening control apparatus according to claim 1,
the stretching end of the pull rope is fixed on the valve through a fixing piece;
and when the opening of the valve is positioned on the central axis of the valve, the stretching length of the stretching rope is half of the total stretching length of the stretching rope.
4. The valve opening control apparatus according to claim 3,
the fixing piece is a mounting bolt.
5. The valve opening control apparatus according to claim 1,
the electric control system comprises a main circuit;
the main circuit comprises a thermal relay connected with the electric actuating mechanism, and a forward contactor and a reverse contactor which are respectively connected with the thermal relay.
6. The valve opening control apparatus according to claim 5,
the electric control system also comprises a control circuit connected with the main circuit of the valve;
a manual-automatic change-over switch is arranged on the control circuit;
the control circuit comprises a manual control circuit and an automatic control circuit which are respectively connected with the manual-automatic change-over switch;
a manual forward switch connected with the forward contactor and a manual reverse switch connected with the reverse contactor are arranged on the manual control circuit;
the automatic control circuit is provided with a forward rotation signal switch connected with the forward rotation contactor and a reverse rotation signal switch connected with the reverse rotation contactor, the forward rotation signal switch receives a forward rotation signal output by the input and output module element, and the reverse rotation signal switch receives a reverse rotation signal output by the input and output module element.
7. The valve opening control apparatus according to claim 6,
and a stop switch is arranged on the manual control circuit.
8. The valve opening control apparatus according to claim 7,
and a maximum limit switch and a minimum limit switch are arranged on the control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022267611.6U CN213711898U (en) | 2020-10-13 | 2020-10-13 | Valve opening control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022267611.6U CN213711898U (en) | 2020-10-13 | 2020-10-13 | Valve opening control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213711898U true CN213711898U (en) | 2021-07-16 |
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ID=76797902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022267611.6U Active CN213711898U (en) | 2020-10-13 | 2020-10-13 | Valve opening control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213711898U (en) |
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2020
- 2020-10-13 CN CN202022267611.6U patent/CN213711898U/en active Active
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