CN208013764U - A kind of dual-protection circuit of electric control system application - Google Patents
A kind of dual-protection circuit of electric control system application Download PDFInfo
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- CN208013764U CN208013764U CN201820518496.5U CN201820518496U CN208013764U CN 208013764 U CN208013764 U CN 208013764U CN 201820518496 U CN201820518496 U CN 201820518496U CN 208013764 U CN208013764 U CN 208013764U
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- limit switch
- relay
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Abstract
The utility model discloses a kind of dual-protection circuits of electric control system application; including carriage mechanism and its driving motor and motor control loop; the stroke of carriage mechanism is equipped with limit switch; motor control loop is equipped with PLC control unit; limit switch is electrically connected with PLC control unit; a relay is added in the input circuit of electric system; the coil of the relay is connect with limit switch, and one group of normally-closed contact of the relay is connected in series in the control loop of the motor control frequency converter.Increase control condition by the output loop in system; and the detecting elements such as the limit switch of this control condition and physical device are linked; reach the purpose that controls in time of output electric element, and protect the contact element of system, the service life of lift elements and the failure rate for reducing system whereby.Suitable for the electric system of various maturations, need not change programmed logic can greatly reduce equipment in the process of running due to system-down caused by hardware damage, maintenance cost.
Description
Technical field
The utility model is related to the duplicate protections that a kind of electric control system more particularly to a kind of electric control system are applied
Circuit.
Background technology
Currently, the electric logic control system of most industrial equipment has been all made of PLC control system.
The basic control mode of PLC control system is：The external I/O signals acquired are received, logic is carried out in PLC softwares
Control, the operation that final output control electric element is moved or stopped.
The shortcomings that prior art：
In the PLC control system of part, the electrical equipments such as motor that output par, c electric element drives reach designated position
And after triggering stop switch, need after waiting for PLC to be disposed, then is stopped controlling electric element by the output of PLC
Operation.During this, electrical equipment also will continue to a period of time of operation very little, the operation of this period of time may result in
The deformation or damage of element or equipment.Moreover, once stop signal occur and can not enter PLC input points, motor meeting
Continuation is moved to assigned direction always, directly results in equipment damage.
Utility model content
The purpose of this utility model is to provide a kind of dual-protection circuit of electric control system application.
The purpose of this utility model is achieved through the following technical solutions：
The dual-protection circuit of the electric control system application of the utility model, including carriage mechanism and its driving motor and
The stroke of motor control loop, the carriage mechanism is equipped with limit switch, and it is single that the motor control loop is equipped with PLC controls
Member, the limit switch are electrically connected with PLC control unit, and a relay is added in the input circuit of electric system, should be after
The coil of electric appliance is connect with the limit switch, and one group of contact series of the relay connect in the motor control loop.
The electrical control that the utility model embodiment provides it can be seen from above-mentioned technical solution provided by the utility model
The dual-protection circuit of system application increases control condition by the output loop in system, and by this control condition and reality
The detecting elements such as the limit switch of equipment link, reach the purpose that controls in time of output electric element, and protect system whereby
Contact element, the service life of lift elements and the failure rate for reducing system.
Description of the drawings
Fig. 1 is the structural schematic diagram of carriage mechanism monnolithic case in the utility model embodiment.
Fig. 2 is the dual-protection circuit electrical schematic for the electric control system application that the utility model embodiment provides.
Fig. 3 is the electrical schematic of motor control loop in the utility model embodiment.
In figure：
1, carriage mechanism；2, limit switch；3, motor；4, relay；5, relay normally closed contact；6, frequency converter.
Specific implementation mode
The utility model embodiment will be described in further detail below.Do not make in the utility model embodiment in detail
The content of description belongs to the prior art well known to professional and technical personnel in the field.
The dual-protection circuit of the electric control system application of the utility model, preferable specific implementation mode are：
Including carriage mechanism and its driving motor and motor control loop, the stroke of the carriage mechanism is equipped with limit and opens
It closes, the motor control loop is equipped with PLC control unit, and the limit switch is electrically connected with PLC control unit, in electric system
Input circuit in a relay is added, the coil of the relay connect with the limit switch, and one group of the relay is tactile
Point is connected in series in the motor control loop.
One group of normally-closed contact of the relay is connected in series in the motor control loop.
The motor is equipped with frequency converter, and one group of normally-closed contact of the relay is connected in series with the control into the frequency converter
In circuit.
The dual-protection circuit of the electric control system application of the utility model, solves two technical problems：When
In PLC control system, PLC output delays cause equipment to stop lag；Second is that in PLC control system, I/O input signals are lost
Caused equipment can not stop, caused equipment damage.
Specific embodiment：
By taking Beiren's N589A accumulation baler products as an example, accumulation baling press is subsidiary engine after the most newly developed print of Beiren, mainly
Function is that output is collected and be packaged to the signature of printing.In the process, the signature of printing first has to through a bracket
Mechanism is accumulated, and the utility model carries out technological improvement mainly for the carriage mechanism power driven system applied in banking process.
Carriage mechanism monnolithic case figure is as shown in Figure 1, including carriage mechanism 1, limit switch 2, motor 3.
The operation principle introduction of system：
When collecting signature, the carriage mechanism for accumulating baler is driven by a motor, is moved from up to down.
After rack system moves downward, after encountering bracket lower position switch, motor stop motion, carriage mechanism is parked in limit
At switch.
After waiting for that carriage mechanism joins with Zhi Tai mechanisms, carriage mechanism is controlled by motor, bottom-up movement, is returned
To initial position.
According to normal control logic, when carriage mechanism is pressed onto limit switch, electric system action is as follows：
Motor control loop can be firstly received limit switch signal variation, and then exporting control motor by PLC stops
Rotation.
In this time interval, carriage mechanism will continue to move downward a bit of displacement, may be made to lower position switch
At damage.
After carriage mechanism is back and forth run repeatedly, limit switch can be damaged due to excessive compression.
If PLC is not received by limit switch signal, motor will rotate always, cause limit switch and machine
The damage of tool equipment.
In order to avoid such case occurs, the utility model adds a relay in electric system input circuit,
It links together with limit detection switch.And one group of normally-closed contact of this relay is connected in series with to the motor control into output loop
In circuit processed.
As shown in Fig. 2, in figure, limit switch 2, relay 4, relay normally closed contact 5, motor control become electrical schematic
Frequency device 6.
After improving utility model, when carriage mechanism is pressed onto limit switch, electric system action is as follows：
Motor control loop exports control motor stalls when receiving limit switch signal variation, by PLC.
At the same time, the relay coil being connect with limit switch obtains electric actuation, relay after limit switch is triggered to
Normally-closed contact disconnect, contact disconnect after, motor inverter due to operating control blackout, can be immediately controlled motor stop fortune
It is dynamic.
Under the control of dual power-off, motor can be immediately performed stopping action, avoid limit switch by greater strength
It squeezes and leads to deformed damaged.Meanwhile once also PLC can be avoided not receive caused by the signal that limit switch passes over
The hidden danger that motor operates always.
The utility model increases control condition (such as relay normally closed contact, limit switch by the output loop in system
Assist the circuits measures such as normally-closed contact, switch button auxiliary normally-closed contact), and the limit of this control condition and physical device is opened
It the detecting elements linkage such as closes, reaches the purpose that controls in time of output electric element, and protect the contact element of system whereby, carry
It rises the service life of element and reduces the failure rate of system.Suitable for the electric system of various maturations, journey need not be changed
Sequence logic can greatly reduce equipment in the process of running due to system-down caused by hardware damage, maintenance cost.Prolonging
While having grown service life of equipment, reduce equipment failure rate, can be that user saves high repair spending.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
It is confined to this, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should be covered within the scope of the utility model.Therefore, the scope of protection of the utility model should
Subject to the scope of protection of the claims.
Claims (3)
1. a kind of dual-protection circuit of electric control system application, including carriage mechanism and its driving motor and motor control back
The stroke on road, the carriage mechanism is equipped with limit switch, and the motor control loop is equipped with PLC control unit, the limit
Switch be electrically connected with PLC control unit, which is characterized in that in the input circuit of electric system addition one relay, this after
The coil of electric appliance is connect with the limit switch, and one group of contact series of the relay connect in the motor control loop.
2. the dual-protection circuit of electric control system application according to claim 1, which is characterized in that the relay
One group of normally-closed contact is connected in series in the motor control loop.
3. the dual-protection circuit of electric control system application according to claim 2, which is characterized in that the motor is set
There are frequency converter, one group of normally-closed contact of the relay to be connected in series in the control loop of the frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518496.5U CN208013764U (en) | 2018-04-12 | 2018-04-12 | A kind of dual-protection circuit of electric control system application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820518496.5U CN208013764U (en) | 2018-04-12 | 2018-04-12 | A kind of dual-protection circuit of electric control system application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208013764U true CN208013764U (en) | 2018-10-26 |
Family
ID=63892567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820518496.5U Active CN208013764U (en) | 2018-04-12 | 2018-04-12 | A kind of dual-protection circuit of electric control system application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208013764U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634233A (en) * | 2019-10-11 | 2019-12-31 | 北京互视达科技有限公司 | Automatic vending machine with dual-limiting protection function |
| CN111047771A (en) * | 2019-12-19 | 2020-04-21 | 北京互视达科技有限公司 | Automatic vending equipment |
| CN112216555A (en) * | 2020-08-24 | 2021-01-12 | 神华新能源有限责任公司 | Relay protection circuit, relay protection device and wind power generation system |
-
2018
- 2018-04-12 CN CN201820518496.5U patent/CN208013764U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110634233A (en) * | 2019-10-11 | 2019-12-31 | 北京互视达科技有限公司 | Automatic vending machine with dual-limiting protection function |
| CN111047771A (en) * | 2019-12-19 | 2020-04-21 | 北京互视达科技有限公司 | Automatic vending equipment |
| CN112216555A (en) * | 2020-08-24 | 2021-01-12 | 神华新能源有限责任公司 | Relay protection circuit, relay protection device and wind power generation system |
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