CN207603199U - A kind of guard grating protector - Google Patents
A kind of guard grating protector Download PDFInfo
- Publication number
- CN207603199U CN207603199U CN201721634996.7U CN201721634996U CN207603199U CN 207603199 U CN207603199 U CN 207603199U CN 201721634996 U CN201721634996 U CN 201721634996U CN 207603199 U CN207603199 U CN 207603199U
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- triode
- current
- rectifier bridge
- control circuit
- base stage
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- 230000001012 protector Effects 0.000 title claims abstract description 17
- 230000009466 transformation Effects 0.000 claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 4
- 239000002360 explosive Substances 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001755 vocal effect Effects 0.000 description 1
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Abstract
The utility model is related to a kind of guard grating protectors, and including polarity transformation circuits and current-limiting control circuit, polarity transformation circuits input terminal is connect with command communication host, and output terminal is connected to scene words station through current-limiting control circuit；Polarity transformation circuits include the first rectifier bridge, the first adjustable regulator circuit, the second adjustable regulator circuit and the first triode, wherein the first rectifier bridge input terminal receives the direct current signal of command communication host, one output pin of the first rectifier bridge is connected to the collector of the first triode through the first adjustable regulator circuit, and another output pin is connected to the base stage of the first triode through the second adjustable regulator circuit；The transmitting of first triode extremely output terminal is connected to multiple scene words stations.For combustible and explosive area safety accident easily occurs for the utility model, installs guard grating protective device additional and voltage, the electric current in circuit are dropped to safe range, so as to avoid the generation of accident.
Description
Technical field
The utility model is related to a kind of safety features, specially a kind of guard grating protector.
Background technology
Guard grating protector is applied in the design of intrinsic safe explosion-proof system, is installed on harbor and is contained intrinsically safe circuit
With the device of non-intrinsically safe circuit, the energy for being sent to live intrinsically safe circuit is limited by current limliting and pressure limiting circuit in circuit, so as to
It prevents the danger energy of non-intrinsically safe circuit from sealing in intrinsically safe circuit, is the important component of the essence safety system.
Guard grating protector be with the matching used equipment of SCZ sound-amplification intercommunication systems, for SCZ sound-amplification intercommunication systems scene
The inflammable and explosive environment at installation words station, there are security risks if withouyt guard grating protector.
Utility model content
For the words station of SCZ sound-amplification intercommunication systems in-site installation in the prior art there are the deficiencies of security risk, this practicality is new
Type will solve the problems, such as to be to provide the peace that a kind of voltage and current that can send host system at scene words station drops to safe range
Full grid protector.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of guard grating protector of the utility model, including polarity transformation circuits and current-limiting control circuit, reversal electricity
Road input terminal is connect with command communication host, and output terminal is connected to scene words station through current-limiting control circuit.
Current-limiting control circuit is multiple, and each current-limiting control circuit connects the signal feedback end of an extension set.
Polarity transformation circuits include the first rectifier bridge, the first adjustable regulator circuit, the second adjustable regulator circuit and first
Triode, wherein the first rectifier bridge input terminal receives the direct current signal of command communication host, an efferent duct of the first rectifier bridge
Foot is connected to the collector of the first triode through the first adjustable regulator circuit, and another output pin is connected to through the second adjustable regulator circuit
The base stage of first triode；The transmitting of first triode extremely output terminal is connected to multiple scene words stations.
Zener diode is equipped between the second adjustable circuit output end of pressure-stabilizing and the base stage of the first triode.
Current-limiting control circuit includes the second rectifier bridge, the second triode and third transistor, wherein the second triode is PNP
Type, third transistor are NPN type, and the second triode and third transistor base stage talk about the electricity at station through divider resistance with each scene respectively
Interface is connected, and the collector of the second triode and the base stage of third transistor connect, the collector of third transistor and the two or three
The base stage connection of pole pipe, the emitter of the second triode and third transistor are connected to the DC output end of the second rectifier bridge, and second
The input terminal of rectifier bridge is connected with the base stage of the first triode and emitter in polarity transformation circuits.
The utility model has the advantages that and advantage：
1. for combustible and explosive area safety accident easily occurs for the utility model, guard grating protective device is installed additional in circuit
Voltage, electric current drop to safe range, so as to avoid the generation of accident.
2. the utility model is simple in structure, easy-to-connect, it is easy to extend, it is of low cost, it can be widely applied to large scale industry
In workshop.
Description of the drawings
Fig. 1 is the block diagram of the utility model；
Fig. 2 is the utility model electrical schematic diagram.
Specific embodiment
The utility model is further elaborated with reference to the accompanying drawings of the specification.
As shown in Figure 1, a kind of guard grating protector of the utility model, including polarity transformation circuits and current-limiting control circuit,
Polarity transformation circuits input terminal is connect with command communication host, and output terminal is connected to scene words station through current-limiting control circuit.
In the present embodiment, current-limiting control circuit is multiple, and each current-limiting control circuit connects the signal feedback end of an extension set.
As shown in Fig. 2, polarity transformation circuits include the first rectifier bridge 1B1, the first adjustable regulator circuit 1Q2, second adjustable
Regulator circuit 1Q1 and the first triode 1Q5, wherein the first rectifier bridge 1B1 input terminals receive the direct current letter of command communication host
Number, an output pin of the first rectifier bridge 1B1 is connected to the collector of the first triode 1Q5 through the first adjustable regulator circuit 1Q2,
Another output pin is through the second adjustable regulator circuit 1Q1 to the first triode 1Q5 base stages；The transmitting of first triode 1Q5 is extremely
Output terminal is connected to multiple scene words stations.
Current-limiting control circuit includes the second rectifier bridge 1B2, the second triode 1Q3 and third transistor 1Q4, wherein the two or three
Pole pipe 1Q3 is positive-negative-positive, and third transistor 1Q4 is NPN type, and the base stage of the second triode 1Q3 and third transistor 1Q4 pass through respectively
Divider resistance is connected with the electrical interface at each scene words station, and the collector of the second triode 1Q3 connects with the base stage of third transistor 1Q4
It connects, the collector of third transistor 1Q4 is connect with the base stage of the second triode 1Q3, the second triode 1Q3 and third transistor
The emitter of 1Q4 is connected to the DC output end of the second rectifier bridge, input terminal one end and the first triode of the second rectifier bridge 1B2
The emitter of 1Q5 is connected, and the other end is connected with regulator circuit IQ1 output terminals.
Zener diode is equipped between the second adjustable circuit output end of pressure-stabilizing and the base stage of the first triode.
In the present embodiment, 1 guard grating protector has the input of 8 tunnels, 8 tunnels to export, every all limited flow control circuit in 1 tunnel,
That is 1 guard grating protector has 8 current-limiting control circuits.Polarity transformation circuits ensure in wiring, it is not necessary to consider circuit
Electric power polarity；The effect of current-limiting control circuit is that the DC current of output is kept to be no more than most under normal and malfunction
Big permissible value, to meet intrinsic safety requirement.Polarity transformation circuits and current-limiting control circuit collectively form safety protective circuit, by non-
Peace electric current is converted to the electric current of intrinsic safety type, simultaneously bi-directionally transmits speech and signaling signal.
In the present embodiment, when DC voltage is inputted for 48V, through the first rectifier bridge 1B1 rectifications, the first adjustable regulator circuit
After 1Q2, the second adjustable regulator circuit 1Q1 (using LM317) decompression, drop stream, output safety voltage 36V drops to safe voltage model
It encloses, then through the first triode 1Q5 and the further current limlitings of zener diode 1V1, voltage stabilizing.Peace is equipped in SCZ sound-amplification intercommunication systems
Full grid protector, the voltage and current that can thus send host system to scene words station are dropped in DC36V safe rangies.
The utility model application current-limiting control circuit, when each scene words station feedback signal electric current is excessive or overtension,
When, the second triode 1Q3 and third transistor 1Q4 make two triodes cut-offs, are equivalent to electricity since base stage has input high voltage
Road disconnects, and plays the role of insulation blocking.
The utility model be and ZPF-2027 essential safe type ordinary instruction extension sets and ZKF-2026 essential safe type anti-noises
Vocal command extension set matches product, and an AB-2 guard gratings protector can realize that 8 tunnels input, 8 tunnels output, with instructing host phase
Connect the broadcast that can be completed under factory's particular surroundings, the intercommunication that amplifies, dispatching communication；In the letter that combustible and explosive area exports system
Number voltage, electric current drop to safe range, avoid the generation of accident.
Claims (3)
1. a kind of guard grating protector, it is characterised in that：Including polarity transformation circuits and current-limiting control circuit, polarity transformation circuits
Input terminal is connect with command communication host, and output terminal is connected to scene words station through current-limiting control circuit；
Polarity transformation circuits include the first rectifier bridge, the first adjustable regulator circuit, the second adjustable regulator circuit and the one or three pole
Pipe, wherein the first rectifier bridge input terminal receives the direct current signal of command communication host, the output pin warp of the first rectifier bridge
First adjustable regulator circuit is connected to the collector of the first triode, and another output pin is connected to first through the second adjustable regulator circuit
The base stage of triode；The transmitting of first triode extremely output terminal is connected to multiple scene words stations；
Current-limiting control circuit includes the second rectifier bridge, the second triode and third transistor, wherein the second triode is positive-negative-positive,
Third transistor is NPN type, and the second triode and third transistor base stage connect respectively through divider resistance and the electricity at each scene words station
Mouth is connected, and the collector of the second triode and the base stage of third transistor connect, the collector of third transistor and the two or three pole
The emitter of the base stage connection of pipe, the second triode and third transistor is connected to the DC output end of the second rectifier bridge, and second is whole
The input terminal of stream bridge is connected with the base stage of the first triode and emitter in polarity transformation circuits.
2. guard grating protector according to claim 1, it is characterised in that：Current-limiting control circuit is multiple, each current limliting
Control circuit connects the signal feedback end of an extension set.
3. guard grating protector according to claim 1, it is characterised in that：In the second adjustable circuit output end of pressure-stabilizing and
Zener diode is equipped between the base stage of one triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634996.7U CN207603199U (en) | 2017-11-29 | 2017-11-29 | A kind of guard grating protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721634996.7U CN207603199U (en) | 2017-11-29 | 2017-11-29 | A kind of guard grating protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207603199U true CN207603199U (en) | 2018-07-10 |
Family
ID=62762607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721634996.7U Active CN207603199U (en) | 2017-11-29 | 2017-11-29 | A kind of guard grating protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207603199U (en) |
-
2017
- 2017-11-29 CN CN201721634996.7U patent/CN207603199U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210720 Address after: 121004 No.188, dongtaipingli, Taihe District, Jinzhou City, Liaoning Province Patentee after: Liaoning Shengbei Communication Technology Co.,Ltd. Address before: 121004 No.188, dongtaipingli, Taihe District, Jinzhou City, Liaoning Province Patentee before: JINZHOU COMMUNICATION EQUIPMENT AND ELECTRONIC ENGINEERING Co.,Ltd. |