CN208062770U - A kind of protection circuit - Google Patents
A kind of protection circuit Download PDFInfo
- Publication number
- CN208062770U CN208062770U CN201820489566.9U CN201820489566U CN208062770U CN 208062770 U CN208062770 U CN 208062770U CN 201820489566 U CN201820489566 U CN 201820489566U CN 208062770 U CN208062770 U CN 208062770U
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- safety box
- power supply
- switch
- coupling cock
- connection
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Abstract
The utility model is related to circuit structure fields; disclose a kind of protection circuit; including the first safety box; it is connected with power supply on first safety box, control power cord is provided on power supply, the first relay is provided between the first safety box and control power cord; first relay includes first coil and the first control switch; the both ends of first coil are connect with the first safety box and power supply respectively, cpu signal line are equipped on the first safety box, the utility model has the following advantages and effect：This programme utilizes new mechanical structure, by the way that the first safety box and the first relay is arranged, first the first relay of safety box pair controls, and when device fails, the first safety box makes the first relay power off control power cord, the transmission of cpu signal is interrupted simultaneously, so that equipment is stopped in time, when needing to restart equipment, needs that control power cord is made to reconnect, cpu signal transmits again, and equipment is made to be not easy to be damaged since failure is not repaired.
Description
Technical field
The utility model is related to a kind of circuit structures, more specifically, it relates to a kind of protection circuit.
Background technology
As intellectualization of factories requirement is higher and higher, unmanned factory is more and more universal, and the equipment in unmanned factory is mostly
It is controlled using PLC, the CPU inside PLC is monitored the working condition of equipment, and when device fails, CPU makes
Reaction, arrestment.
Currently, common equipment protection circuit timely can carry out cut-out in device fails to circuit makes equipment
It no longer works, when worker, which repairs, to complete, circuit is closed by worker again, and equipment is allow to continue to run with, but is set when one
For when breaking down, failure may lead to chain reaction, make not only there was only failure at one in equipment, when worker has repaired at one
Failure starts equipment, and another place's failure can damage equipment.
Utility model content
In view of the deficienciess of the prior art, the utility model lies in that providing a kind of protection circuit, has and reduce equipment damage
Bad effect.
To achieve the above object, the utility model provides following technical solution：A kind of protection circuit, it is characterized in that：Packet
The first safety box is included, power supply is connected on first safety box, control power cord, institute are provided on the power supply
It states and is provided with the first relay between the first safety box and the control power cord, first relay includes mounted on described
First coil on first safety box, the first control on the control power cord for carrying out break-make to control power cord
System switchs, and is equipped on first safety box and is used for transmission signal to the cpu signal line of CPU, first safety box includes
First coupling cock and the 4th coupling cock, the both ends of first coupling cock respectively with the power supply and described first
Coil connects, and the both ends of the first coil are connect with first coupling cock and power supply respectively, the 4th connection
The both ends of switch are connect with the power supply and cpu signal line respectively.
By using above-mentioned technical proposal, when device fails, first switch and the 4th switch disconnect, and keep power supply electric
Source is separated with first coil, and no electric current passes through in first coil, at this time first coil can not to first control switch into
Row absorption controls power cord and is not powered to equipment, while in cpu signal line not at this time to make control power cord disconnect
Have at signal transmission to CPU again, to make equipment shut down；After the completion of worker repairs, worker is by first switch and the 4th
Switch is closed, and makes have electric current to flow through in first coil, has signal transmission, the magnetism of first coil to make the first control in cpu signal line
System switch re-closes, and CPU receives signal and re-starts work, to make equipment remain in operation；Only in control power cord
Equipment can just work on after inside having electric current and CPU to receive signal, i.e., equipment can just work on after the faulty solution of institute, subtract
The damage of equipment is lacked.
The utility model is further arranged to：Be provided between first safety box and the control power cord second after
Electric appliance, second relay include the second coil being mounted on first safety box, are mounted on the control power cord
On for control power cord carry out break-make second control switch, first safety box further includes the second coupling cock, institute
The both ends for stating the second coupling cock are connect with the power supply and the second coil respectively, the both ends of second coil respectively with
Second coupling cock is connected with power supply.
By using above-mentioned technical proposal, when device fails, the second coupling cock disconnects, and makes the second coil not to the
Two control switches are adsorbed, and keep control power cord breaking, the second relay provides another heavy guarantee for equipment, reduces and set
Standby damaged probability.
The utility model is further arranged to：The second safety is provided between the power supply and first safety box
Box, is also equipped with the cpu signal line on second safety box, second safety box include the first conducting switch, second
Conducting switch and the 4th conducting switch, and the both ends of the first conducting switch are connected to the power supply and described first respectively
The both ends of switch connection, the second conducting switch are connect with the power supply and second coupling cock respectively, described
The both ends of 4th conducting switch are connect with the power supply and cpu signal line respectively.
By using above-mentioned technical proposal, when device fails, the first conducting switch, the second conducting switch and the 4th
Conducting switch disconnects, and to make that open circuit occurs between the first safety box and power supply, makes CPU that can not receive signal, equipment
It is stopped, if the first safety box breaks down, the second safety box can continue to provide protection for equipment, and it is impaired to reduce equipment
Probability.
The utility model is further arranged to：First safety box further includes third connecting switch, second safety
Box further includes third conducting switch, and switch is connected with the third and is connected with each other for the third connecting switch.
By using above-mentioned technical proposal, third connecting switch and third conducting switch are safe by the first safety box and second
Box links together, and enables the first safety box and the second safety box synchronous operation, but when device fails, third conducting
Switch and third connecting switch disconnect, and reduce influencing each other between the first safety box and the second safety box.
The utility model is further arranged to：4th coupling cock is connect by the first connecting line with power supply,
The 4th conducting switch is connect by the second connecting line with the power supply, and second connecting line is led far from the described 4th
The one end for opening up pass is connect with the control power cord, first connecting line one end and institute far from the 4th coupling cock
State the connection of the second connecting line.
By using above-mentioned technical proposal, the first connecting line and the second connecting line are attached with power supply, and first connects
Wiring and the second connecting line will interconnect between the 4th coupling cock and the 4th conducting switch again, and cpu signal line is made to convey
Signal is more identical, reduces the probability of false triggering.
The utility model is further arranged to：Pass through connection between first coupling cock and the first conducting switch
Conducting wire connects, and is connected also by the connecting wire between second coupling cock and the second conducting switch, the company
It connects and fuse is installed on conducting wire.
By using above-mentioned technical proposal, when the first safety box or the second safety box break down, fuse can and
Shi Fasheng fuses, and makes the generation open circuit between the first safety box and the second safety box, makes the first safety box or the second safety box not
It is vulnerable to influence.
In conclusion the utility model has the advantages that：
1, by being arranged the first safety box, the second safety box, the first relay and the second relay, the first safety box and the
Two the first relays of safety box pair and the second relay control, when device fails, the first safety box and the second peace
Full box can make the first relay and the second relay power off control power cord in time, while interrupt the biography of cpu signal
It is defeated, so that equipment is stopped in time, when needing to restart equipment, needs that control power cord is made to reconnect, cpu signal passes again
It is defeated, to make equipment be not easy to be damaged since failure is not repaired.
Description of the drawings
Fig. 1 is the internal wiring figure of the utility model.
Reference numeral：1, the first safety box；11, the first coupling cock；12, the second coupling cock；13, third connecting is opened
It closes；14, the 4th coupling cock；2, the second safety box；21, the first conducting switch；22, the second conducting switch；23, third conducting is opened
It closes；24, the 4th conducting switch；3, power supply；31, power cord is controlled；4, cpu signal line；41, the first connecting line；42, second
Connecting line；51, first coil；52, the first control switch；61, the second coil；62, the second control switch；7, connecting wire；71,
Fuse.
Specific implementation mode
The utility model is described further with reference to attached drawing.
As shown in Figure 1, a kind of protection circuit, including the first safety box 1 and the second safety box 2, the first safety box 1 includes the
One coupling cock 11, the second coupling cock 12, third connecting switch 13 and the 4th coupling cock 14, the second safety box 2 include the
Switch 22 is connected in one conducting switch 21, second, switch 24 is connected in third conducting switch 23 and the 4th.First coupling cock 11 and
One conducting switch 21 between be electrically connected by connecting wire 7, the second coupling cock 12 and second conducting switch 22 between also by
Connecting wire 7 is electrically connected to each other, and fuse 71 is equipped in connecting wire 7, and switch 23 is connected with third for third connecting switch 13
Between be electrically connected to each other.The one end of first coupling cock 11 and first conducting switch 21 away from each other is electrically connected with power supply
3, the second coupling cock 12 is also electrically connected with power supply 3 with the one end of the second conducting switch 22 away from each other.On power supply 3
It is electrically connected with control power cord 31, the first conducting switch 21 and second is connected switch 22 and is electrically connected with control power cord 31.The
One end of four conducting switches 24 is electrically connected by the second connecting line 42 with control power cord 31, and the other end is electrically connected with cpu signal
One end of line 4, the 4th coupling cock 14 is electrically connected by the first connecting line 41 with the second connecting line 42, and the other end is also electrically connected with
Cpu signal line 4.It is provided with the first relay and the second relay, the first relay between first safety box 1 and control power cord 31
Device includes that first coil 51 and first controls switch 52, and the second relay includes that the second coil 61 and second controls switch 62, the
One coil 51 is mounted on the one end of the first coupling cock 11 far from the first conducting switch 21, and the second coil 61 is mounted on the second connection
The one end of switch 12 far from the second conducting switch 22, the first control switch 52 and second control switch 62 and are mounted on control power cord
It is in series on 31 and mutually.
In conclusion when device fails, the first coupling cock 11, the second coupling cock 12, third connecting switch
13 and the 4th coupling cock 14 disconnect, first conducting switch 21, second be connected switch 22, third be connected switch 23 and the 4th conducting
Switch 24 also disconnects, and no current passes through in first coil 51 and the second coil 61 at this time, 61 nothing of first coil 51 and the second coil
Method generates magnetism, and the first control switch 52 and second controls switch 62 and opens, to make control power cord 31 disconnect, control power supply
Line 31 can not be powered equipment, simultaneously because the 4th coupling cock 14 and the 4th conducting switch 24 disconnects, make signal can not
It is transmitted at CPU by cpu signal line 4, equipment shuts down due to not receiving signal, ensures that equipment in failure
When can be stopped faster；After the completion of worker repairs, worker is by the first coupling cock 11, the second coupling cock 12, third
Coupling cock 13 and the 4th coupling cock 14 are closed, by switch 22 is connected in the first conducting switch 21, second, switch 23 is connected in third
It is closed with the 4th conducting switch 24, there is electric current to pass through in first coil 51 and the second coil 61 at this time, have letter in cpu signal line 4
Number transmission, first control switch 52 and second control switch 62 re-closes, CPU receives signal and re-starts work, at this time
There are electric current and CPU to receive signal in control power cord 31, equipment works on, i.e., equipment could be after after institute's faulty solution
Continuous work.
The above is only the preferred embodiment of the utility model, and the scope of protection of the utility model is not limited merely to
Above-described embodiment, technical solution belonging to the idea of the present invention belong to the scope of protection of the utility model.It should refer to
Go out, for those skilled in the art, it is without departing from the principle of the utility model it is several improvement and
Retouching, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (6)
1. a kind of protection circuit, it is characterized in that：Including the first safety box（1）, first safety box（1）On be connected with power supply electricity
Source（3）, the power supply（3）On be provided with control power cord（31）, first safety box（1）With the control power cord
（31）Between be provided with the first relay, first relay includes being mounted on first safety box（1）On First Line
Circle（51）, be mounted on the control power cord（31）On for control power cord（31）Carry out the first control switch of break-make
（52）, first safety box（1）On be equipped with and be used for transmission signal to the cpu signal line of CPU（4）, first safety box
（1）Including the first coupling cock（11）With the 4th coupling cock（14）, first coupling cock（11）Both ends respectively with institute
State power supply（3）With the first coil（51）Connection, the first coil（51）Both ends be connected to respectively with described first
Switch（11）And power supply（3）Connection, the 4th coupling cock（14）Both ends respectively with the power supply（3）With
Cpu signal line（4）Connection.
2. a kind of protection circuit according to claim 1, it is characterized in that：First safety box（1）With control electricity
Source line（31）Between be provided with the second relay, second relay includes being mounted on first safety box（1）On
Two coil（61）, be mounted on the control power cord（31）On for control power cord（31）The second control for carrying out break-make is opened
It closes（62）, first safety box（1）It further include the second coupling cock（12）, second coupling cock（12）Both ends difference
With the power supply（3）With the second coil（61）Connection, second coil（61）Both ends be connected to respectively with described second
Switch（12）And power supply（3）Connection.
3. a kind of protection circuit according to claim 2, it is characterized in that：The power supply（3）With first safety
Box（1）Between be provided with the second safety box（2）, second safety box（2）On the cpu signal line is also installed（4）, described
Second safety box（2）Including the first conducting switch（21）, second conducting switch（22）With the 4th conducting switch（24）, described first
Conducting switch（21）Both ends respectively with the power supply（3）With first coupling cock（11）Connection, described second leads
Open up pass（22）Both ends respectively with the power supply（3）With second coupling cock（12）Connection, the 4th conducting
Switch（24）Both ends respectively with the power supply（3）With cpu signal line（4）Connection.
4. a kind of protection circuit according to claim 3, it is characterized in that：First safety box（1）Further include that third connects
Open up pass（13）, second safety box（2）It further include third conducting switch（23）, the third connecting switch（13）With it is described
Third conducting switch（23）It is connected with each other.
5. a kind of protection circuit according to claim 4, it is characterized in that：4th coupling cock（14）Connect by first
Wiring（41）With power supply（3）Connection, the 4th conducting switch（24）Pass through the second connecting line（42）With power supply electricity
Source（3）Connection, second connecting line（42）Far from the 4th conducting switch（24）One end and the control power cord
（31）Connection, first connecting line（41）Far from the 4th coupling cock（14）One end and second connecting line（42）
Connection.
6. a kind of protection circuit according to claim 4, it is characterized in that：First coupling cock（11）With described first
Conducting switch（21）Between pass through connecting wire（7）Connection, second coupling cock（12）It is switched with second conducting
（22）Between also by the connecting wire（7）Connection, the connecting wire（7）On fuse is installed（71）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820489566.9U CN208062770U (en) | 2018-04-08 | 2018-04-08 | A kind of protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820489566.9U CN208062770U (en) | 2018-04-08 | 2018-04-08 | A kind of protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208062770U true CN208062770U (en) | 2018-11-06 |
Family
ID=63984724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820489566.9U Active CN208062770U (en) | 2018-04-08 | 2018-04-08 | A kind of protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208062770U (en) |
-
2018
- 2018-04-08 CN CN201820489566.9U patent/CN208062770U/en active Active
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