CN201297423Y - Precision regulation and control mechanism of a valve electric device - Google Patents
Precision regulation and control mechanism of a valve electric device Download PDFInfo
- Publication number
- CN201297423Y CN201297423Y CNU2008201048667U CN200820104866U CN201297423Y CN 201297423 Y CN201297423 Y CN 201297423Y CN U2008201048667 U CNU2008201048667 U CN U2008201048667U CN 200820104866 U CN200820104866 U CN 200820104866U CN 201297423 Y CN201297423 Y CN 201297423Y
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- valve
- motor
- electric device
- contactor
- coil
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Abstract
The utility model discloses a precision regulation and control mechanism of a valve electric device. In the technical proposal, the coil leads of a valve opening potentiometer, a travel limit switch and an AC contactor are respectively connected with an intelligent module correspondingly; a braking resistor is connected with the normally closed auxiliary contact of the AC contactor in series; and the normally closed auxiliary contact is connected with a motor coil and is controlled by the output of the intelligent module. When the technical proposal with the power-consuming brake is used, after the motor has a power failure, the braking resistor and the motor coil can be instantly connected in series to form a loop; the residual magnetism of the motor coil can be used to form a reverse current so as to brake the motor and reduce the errors caused by the inertia of the motor; and the AC contactor can be controlled by an intelligent module. The control precision of the mechanism can reach less than or equal to 0.5 percent, therefore, the utility model can satisfy the requirements of the fluid industrial plant for the control of the medium flow.
Description
Technical field
The utility model belongs to the technical field of fluid industrial automation control, relates to a functional part on the electric device for valve, and the precision that especially relates to electric device for valve is regulated control mechanism.
Background technique
Valve and water, vapour, the industrial development of wet goods fluid have close ties, development along with industrial automation, traditional manual machinery regulative mode is no longer suitable in many occasions, realizing the industrial automation management of pipe network system, is the actuator that be unable to do without in this pipe network system of Electric actuator.
In above-mentioned flow process operation, control technique to valve is not only the control of simple Push And Release, but also the various relations that relate to aperture control and adjusting flow coefficient etc. are controlled, this control performance to electric device for valve is had higher requirement, tend to according to actual needs valve be opened or closed in the application, perhaps reach to a certain degree, even with certain dynamic rule operation.
In traditional analog control mode, the terminal use utilizes the size of input current to represent the opening angle of valve, current signal of opening state position feedback of valve is given terminal use (as Fig. 3 in this Figure of description and shown in Figure 4) simultaneously, because the inertia residual quantity of motor, often make the actual open amount and the input quantity error of valve bigger, generally be difficult to satisfy client's degree of regulation requirement.
The model utility content
At above-mentioned defective, the utility model provides a kind of precision of electric device for valve to regulate control mechanism, its objective is the problem of the inertia residual quantity deficiency that solves existing electric device for valve motor.
To achieve these goals, the technological scheme taked of the utility model is:
The precision of this electric device for valve provided by the utility model is regulated control mechanism, and wherein, the coil lead of valve opening potentiometer, lead limit switch and A.C. contactor is corresponding with intelligent object respectively to link to each other; The normally closed auxiliary contact of braking resistor and described A.C. contactor is connected in series, and described normally closed auxiliary contact links to each other with the coil of motor, by intelligent object output control.
Described valve opening potentiometer, lead limit switch, braking resistor are installed in the casing respectively; Described A.C. contactor, intelligent object are installed in the electric appliance control box respectively.
Main circuit in the described electric device for valve is: the main contact of described A.C. contactor is connected with the coil of described motor.
Secondary circuit in the described electric device for valve is: described braking resistor is series on the coil of motor by described normally closed auxiliary contact.
The utility model adopts the beneficial effect of technique scheme to be, adopts the method for dynamic braking, after the motor outage, braking resistor and motor coil moment are connected into the loop, utilize motor coil remanent magnetism to form a back current, make motor braking, reduce the error that motor inertia is caused.Utilize the main and auxiliary contact control brake resistance of A.C. contactor just in time to satisfy this requirement, by intelligent object control A.C. contactor, solved the problem of the inertia residual quantity deficiency of electric device for valve motor in the prior art, the control accuracy of this mechanism can realize≤0.5% scope, can satisfy the requirement of fluid commercial plant control media flow.
Description of drawings
Each width of cloth accompanying drawing of this specification is respectively:
Fig. 1 is the profile reference drawing of electric device for valve;
Fig. 2 is the profile side projection reference drawing of Fig. 1;
Fig. 3 is the structural representation of the controlling component of commercially available electric device for valve;
Fig. 4 is the circuit diagram of the commercially available electric device for valve of Fig. 3;
Fig. 5 is a structural representation of the present utility model;
Fig. 6 is the circuit diagram of the utility model Fig. 5.
Above-mentioned each figure acceptance of the bid note is respectively:
101, valve opening potentiometer, 102, casing, 103, lead limit switch, 104, A.C. contactor, 105, intelligent object, 106, braking resistor, 107, input/output port, 108, motor, 109, main contact, 110, normally closed auxiliary contact, 201, electric appliance control box.
Embodiment
The utility model provides a kind of precision of electric device for valve and regulates control mechanism, describes in detail below in conjunction with accompanying drawing:
Shown in Figure 1 is the positive facial contour of the electric device for valve in the utility model, wherein, comprises casing (102) and electric appliance control box (201).
Shown in Figure 2 is the side projection of the electric device for valve in the utility model, and the left side among the figure is motor (108).
In Fig. 5 and Fig. 6,
Valve opening potentiometer (101), lead limit switch (103), braking resistor (106), be installed in the casing (102) respectively;
A.C. contactor (104), intelligent object (105) are installed in respectively in the electric appliance control box (201).
Valve opening potentiometer (101), limit switch (103) are taken a sample respectively and the aperture of limit switches, link to each other with the driving mechanism of electric device for valve, and their fixture wire inserts on the corresponding terminal of intelligent object (105), amplifies comparison process.
Main contact (109) two width of cloth of A.C. contactor (104) (commutation is used) parallel connection, an end is connected with motor (108) coil.Corresponding two width of cloth normally closed auxiliary contacts (110) series connection, an end also links to each other with motor (108) coil, braking resistor (106) series connection normally closed auxiliary contact (110) the other end.
Intelligent object (105) output terminal links to each other with A.C. contactor (104) coil, the break-make of control A.C. contactor (104).
In circuit shown in Figure 6, the work loop of main circuit:
User's control signal 4-20mA is by input/output port (107) input, and A.C. contactor (104) moves, main contact (109) adhesive, and main circuit is connected, and drive motor (108) operation opens or closes valve.Normally closed auxiliary contact (110) disconnects simultaneously, makes braking resistor (106) not participate in the work loop.
When the aperture signal of valve opening potentiometer (101) amplifies comparison process and identical with the aperture signal of valve through intelligent object (105); Or the valve open and close are to lead limit switch (103) when action, and A.C. contactor (104) discharges, and disconnection is finished in main circuit work.
When A.C. contactor (104) discharges, secondary circuit is connected, braking resistor (106) is by normally closed auxiliary contact (110) closure, moment is series on motor (108) coil, utilize the remanent magnetism of motor (108) coil, produce a back current, make motor (108) braking, to subdue rotor inertia, reach satisfied consistent with input value.
Claims (4)
1, a kind of precision of electric device for valve is regulated control mechanism, it is characterized in that: the coil lead of valve opening potentiometer (101), lead limit switch (103) and A.C. contactor (104) is corresponding with intelligent object (105) respectively to link to each other; Braking resistor (106) is connected in series with the normally closed auxiliary contact (110) of described A.C. contactor (104), and described normally closed auxiliary contact (110) links to each other with the coil of motor (108), by intelligent object (105) output control.
2, the precision of electric device for valve according to claim 1 is regulated control mechanism, and it is characterized in that: described valve opening potentiometer (101), lead limit switch (103), braking resistor (106) are installed in respectively in the casing (102); Described A.C. contactor (104), intelligent object (105) are installed in respectively in the electric appliance control box (201).
3, regulate control mechanism according to the precision of claim 1 or 2 described electric device for valve, it is characterized in that: the main circuit in the described electric device for valve is: the main contact (109) of described A.C. contactor (104) is connected with the coil of described motor (108).
4, regulate control mechanism according to the precision of claim 1 or 2 described electric device for valve, it is characterized in that: the secondary circuit in the described electric device for valve is: described braking resistor (106) is series on the coil of described motor (108) by described normally closed auxiliary contact (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201048667U CN201297423Y (en) | 2008-04-12 | 2008-04-12 | Precision regulation and control mechanism of a valve electric device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201048667U CN201297423Y (en) | 2008-04-12 | 2008-04-12 | Precision regulation and control mechanism of a valve electric device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297423Y true CN201297423Y (en) | 2009-08-26 |
Family
ID=41043403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201048667U Expired - Fee Related CN201297423Y (en) | 2008-04-12 | 2008-04-12 | Precision regulation and control mechanism of a valve electric device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201297423Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734584A (en) * | 2013-12-20 | 2015-06-24 | 珠海格力电器股份有限公司 | Synchronous motor braking circuit, braking system and braking method |
-
2008
- 2008-04-12 CN CNU2008201048667U patent/CN201297423Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734584A (en) * | 2013-12-20 | 2015-06-24 | 珠海格力电器股份有限公司 | Synchronous motor braking circuit, braking system and braking method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huangshan Liangye Valve Co., Ltd. Assignor: Xiang Meigen Contract record no.: 2011340000110 Denomination of utility model: Precision regulation and control mechanism of a valve electric device Granted publication date: 20090826 License type: Exclusive License Record date: 20110711 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20140412 |