CN207184050U - A kind of anti-explosion safety grid - Google Patents
A kind of anti-explosion safety grid Download PDFInfo
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- CN207184050U CN207184050U CN201721220921.4U CN201721220921U CN207184050U CN 207184050 U CN207184050 U CN 207184050U CN 201721220921 U CN201721220921 U CN 201721220921U CN 207184050 U CN207184050 U CN 207184050U
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- voltage
- safety grid
- explosion safety
- explosion
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Abstract
The utility model discloses a kind of anti-explosion safety grid, including input, output port, fuse protection unit, voltage regulation unit, the current limiting unit being connected in turn between input, output port；Wherein, voltage regulation unit includes the parallel circuit being made up of different voltage-regulator diodes.Too high voltage is prevented, electric current inputs the access control equipment in hazardous area.Lasting high power supply voltage excessively can trigger the quick fuse defencive function of guard grating so that guard grating quickly can disconnect with electrical equipment.Function and the use of existing explosion-proof access control equipment are not influenceed.By this anti-explosion safety grid, explosion-proof gate inhibition's equipment fault in hazardous area will not produce electric spark.
Description
Technical field
The utility model belongs to the explosion-proof gate inhibition field of petrochemical industry explosion gas environment, and in particular to a kind of anti-explosion safety
Grid.
Background technology
Guard grating is also known as safety holder.The safe interface in intrinsic safety loop, it can be in place of safety (non-intrinsically safe safety) and danger
Bi-directional electric signal between danger zone (essential safety), and place of safety caused by barrier for some reason can be limited and turned to the energy in hazardous area
Pass.Generally Recognized as safe grid have Zener type and isolated.
Intrinsic safety type guard grating is applied in the design of intrinsic safe explosion-proof system, and it is mounted to harbor and containing intrinsic safety electricity
Road and the device of non-intrinsically safe circuit, the energy for being sent to live intrinsic safety loop is limited by current limliting and pressure limiting circuit in circuit, from
And preventing that the danger energy of non-intrinsically safe circuit from sealing in intrinsically safe circuit, it is referred to as associate device in intrinsic safe explosion-proof system, is intrinsic safety
The important component of system.
The interface for a limitation energy being designed to due to guard grating between field apparatus and control room equipment, because
No matter control room equipment is in normal or malfunction, the energy that guard grating can ensure to send field apparatus to by it for this
Essential safety.
China national instrument and meter anti-explosion safety supervisory station is the explosion-proof production of People's Republic of China's head knocker production safety
The authoritative institution of product, there are strict, science, detailed regulation to intrinsic safety type guard grating product, only pass through the supervisory station certification
Enterprise and its product of institute's Development and Production just possess standard compliant security performance, otherwise may give user equipment,
Personnel and production cause beyond measure infringement.
Its model is must take into consideration when selecting guard grating to be adapted with field instrument type, must also consider guard grating and essence
Safety instrument requires the problem of the essence safety system middle impedance matching that is mutually compatible and being formed.
At present, the equipment used in some inflammable and explosive environment, it is the type that guard grating is selected according to device type mostly
Number installed, do not had such as specifically for the Special safety grid of specific explosion-proof environment design, existing explosion protection system guard grating
Lower shortcoming：
On the one hand, existing guard grating is installed during installation by the binding post with screw, what it was installed
Process is more complicated, it is necessary to first turns on screw, after then carefully connecting the wire, then screw is screwed on, add the flow of installation；
On the other hand, after existing guard grating is encased in explosion protection system, due to factors such as element matchings so that guard grating exists
Easily generated heat during use, and low pressure and low power deficiency, certain potential safety hazard be present.
The content of the invention
Technical problem to be solved in the utility model is：A kind of anti-explosion safety grid are provided, solves and prevents in the prior art
The problem of quick-fried guard grating easily generates heat, low pressure and low power deficiency.
The utility model uses following technical scheme to solve above-mentioned technical problem：
A kind of anti-explosion safety grid, including input, output port, the fusing being connected in turn between input, output port are protected
Protect unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes the parallel circuit being made up of different voltage-regulator diodes.
The anti-explosion safety grid are gate inhibition's signal anti-explosion safety grid, and its voltage regulation unit includes two identical parallel branches, often
Individual parallel branch is connected in series including two pressure-resistant identical voltage-regulator diodes.
The pressure-resistant of the voltage-regulator diode is 3.6V.
The anti-explosion safety grid are gate inhibition's power supply anti-explosion safety grid, and its voltage regulation unit includes two identical parallel branches, often
Individual parallel branch includes a voltage-regulator diode.
The pressure-resistant of the voltage-regulator diode is 11V.
The anti-explosion safety grid are gate inhibition's door lock power supply anti-explosion safety grid, and its voltage regulation unit includes two identicals branch in parallel
Road, each parallel branch are connected in series including two pressure-resistant different voltage-regulator diodes.
Voltage-regulator diode in same parallel branch, it is 6.2V that one pressure-resistant, and it is 8.2V that another is pressure-resistant.
Input, output port have the binding post with buckle.
Compared with prior art, the utility model has the advantages that：
1st, too high voltage is prevented, electric current inputs the access control equipment in hazardous area.
2nd, lasting high power supply voltage excessively can trigger the quick fuse defencive function of guard grating so that guard grating can be quick
Disconnected with electrical equipment.
3rd, function and the use of existing explosion-proof access control equipment are not influenceed.
4th, electric spark will not be produced by this anti-explosion safety grid, explosion-proof gate inhibition's equipment fault in hazardous area.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model gate inhibition's signals security grid.
Fig. 2 is the circuit theory diagrams of the utility model gate inhibition's power supply anti-explosion safety grid.
Fig. 3 is the circuit theory diagrams of the utility model gate inhibition's door lock power supply anti-explosion safety grid.
Fig. 4 is the utility model input, the structural representation of output port.
Embodiment
Structure of the present utility model and the course of work are described further below in conjunction with the accompanying drawings.
A kind of anti-explosion safety grid, including input, output port, the fusing being connected in turn between input, output port are protected
Protect unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes the parallel circuit being made up of different voltage-regulator diodes.
Specific embodiment one, as shown in Figure 1：
A kind of gate inhibition's signal anti-explosion safety grid, including input, output port, are connected in turn between input, output port
Fuse protection unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes two identical parallel branches, each in parallel
Branch road is connected in series including two pressure-resistant identical voltage-regulator diodes, one of branch routing zener D1 and D3 series connection
Composition, another branch routing zener D2 and D4 are composed in series, specifically as illustrated, the positive pole and fuse of input port
F1 one end connection, the negative electrode with voltage-regulator diode D1, D2, current-limiting resistance R1 one end connect the fuse F1 other end respectively
Connect, the positive pole of the other end of current-limiting resistance and output port connects, input, the negative pole of output port, voltage-regulator diode D3, D4
Anode is grounded.
The circuit of the present embodiment is mainly used in, gate inhibition's data-signal in hazardous area, switching signal, 485 signals, 3V voltages letter
Number, 4.5V voltage signals, 5V voltage signals, the control of 6V voltage signals, therefore, all selection 3.6V is pressure-resistant for voltage-regulator diode,
Each branch road selects two series connection, it is therefore an objective to and below 7.2V signal can be quickly through, increases the scope of signal transmission,
Flexibility is higher.
Based on foregoing circuit application, the fuse F1 selection 350ma of the embodiment, optimal effectiveness resistance is 36 Europe.
Do not influenceing various gate inhibition's signal transmission under normal circumstances, the overload voltage and current that can limit place of safety is passed to
On the access control equipment in hazardous area, it can start quick fuse mode more than explosion-proof guard grating after the equipment in itself carrying of maximum and protect danger
The access control equipment of danger zone is perfectly safe, and the access control equipment in hazardous area, which runs into failure and short circuit, will not also produce any electric spark.
The circuit parameter of the embodiment is as follows：
Output voltage Uo:7.5V, output current Io：295mA, power output Po：0.56W, external capacitive Co:11.1 outside
Portion inductance Lo:0.3.
Specific embodiment two, as shown in Figure 2：
A kind of gate inhibition's power supply anti-explosion safety grid, including input, output port, are connected in turn between input, output port
Fuse protection unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes two identical parallel branches, each in parallel
Branch road includes a voltage-regulator diode, and two voltage-regulator diodes are respectively D5 and D6, it is specific as illustrated, input port just
Pole is connected with fuse F2 one end, the fuse F2 other end negative electrode with voltage-regulator diode D5, D6, current-limiting resistance R2 respectively
One end connection, the positive pole of the current-limiting resistance R2 other end and output port connects, input, the negative pole of output port, voltage stabilizing two
The anode of pole pipe D5, D6 is grounded.
The circuit of the present embodiment is mainly used in：Gate inhibition's host supplying power in hazardous area, the pressure-resistant selection 11V of voltage-regulator diode.
Do not influenceing gate inhibition's main frame under normal circumstances, the overload voltage and current that can limit place of safety is passed to hazardous area
On gate inhibition's main frame, the door that quick fuse mode protects hazardous area can be started more than explosion-proof guard grating after equipment in itself maximum carrying
Prohibit main frame to be perfectly safe, gate inhibition's main frame in hazardous area, which runs into failure and short circuit, will not also produce any electric spark.
Based on foregoing circuit application, the fuse F2 selection 350ma of the embodiment, optimal effectiveness resistance is 120 Europe.
The circuit parameter of the embodiment is as follows：
Output voltage Uo:12V, output current Io：102mA, power output Po：0.316W, external capacitive Co:1.411 outside
Portion inductance Lo:3.
Specific embodiment three, as shown in Figure 3：
A kind of gate inhibition's signal anti-explosion safety grid, including input, output port, are connected in turn between input, output port
Fuse protection unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes two identical parallel branches, each in parallel
Branch road is connected in series including two pressure-resistant different voltage-regulator diodes, one of branch routing zener D7 and D9 series connection
Composition, another branch routing zener D8 and D10 are composed in series, specifically as illustrated, positive pole and the fusing of input port
Device F3 one end connection, the negative electrode with voltage-regulator diode D7, D8, current-limiting resistance R3 one end connect the fuse F3 other end respectively
Connect, the positive pole of the current-limiting resistance R3 other end and output port connects, input, the negative pole of output port, voltage-regulator diode D9,
D10 anode is grounded.
The circuit of the embodiment is mainly used in：Gate inhibition's electric lock in hazardous area is powered, the pole of voltage stabilizing two in same parallel branch
Pipe, it is 6.2V that one pressure-resistant, and it is 8.2V that another is pressure-resistant.
Do not influenceing electric lock under normal circumstances, the overload voltage and current that can limit place of safety is passed to the gate inhibition in hazardous area
On electric lock, it can start quick fuse mode more than explosion-proof guard grating after the equipment in itself carrying of maximum and protect the gate inhibition in hazardous area electric
Lock is perfectly safe, and gate inhibition's electric lock in hazardous area, which runs into failure and short circuit, will not also produce any electric spark.
Based on foregoing circuit application, the fuse F3 selection 350ma of the embodiment, optimal effectiveness resistance is 95 Europe.
The circuit parameter of the embodiment is as follows：
Output voltage Uo:15V, output current Io：160mA, power output Po：0.60W, external capacitive Co:0.58, it is outside
Inductance Lo:1.2.
The operation principle and application process of this programme anti-explosion safety grid are as follows：
Input, output port there is the binding post with buckle, as shown in figure 4, using when, anti-explosion safety grid are arranged on
Place of safety, input port positive pole 1 and input port negative pole 2 connect input signal, and output port positive pole 3 and output port negative pole 4 connect
Load positioned at hazardous area, for anti-explosion safety grid in order to increase security, shell has earth terminal.
This programme is also equipped with following advantage：
1st, anti-explosion safety grid use the modes such as pressure limiting, current limliting, quick fuse to protect hazardous area electrical equipment.
2nd, the circuit board of anti-explosion safety grid is sealed using epoxide-resin glue.
3rd, electric spark will not be produced during the electrical equipment malfunction short circuit in anti-explosion safety grid energy absolute guarantee hazardous area.
The system design is designed using multiple security, the access control equipment normal work in hazardous area is not influenceed, in petrochemical industry
Gate inhibition's main frame in the explosion-proof hazardous area of explosion gas environment, electric lock, switching signal, data-signal in use, will overload energy
The incoming hazardous area of amount, using the grid pressure limiting of this anti-explosion safety, the multi-protective function of current limliting and quick fuse circuit, it is ensured that hazardous area
Gate control system safety and normal use the problem of.
Claims (8)
- A kind of 1. anti-explosion safety grid, it is characterised in that：Including input, output port, it is connected in turn between input, output port Fuse protection unit, voltage regulation unit, current limiting unit；Wherein, voltage regulation unit includes the parallel connection being made up of different voltage-regulator diodes Circuit.
- 2. anti-explosion safety grid according to claim 1, it is characterised in that：The anti-explosion safety grid are gate inhibition's signal anti-explosion safety Grid, its voltage regulation unit include two identical parallel branches, and each parallel branch includes two pressure-resistant poles of identical voltage stabilizing two Pipe is connected in series.
- 3. anti-explosion safety grid according to claim 2, it is characterised in that：The pressure-resistant of the voltage-regulator diode is 3.6V.
- 4. anti-explosion safety grid according to claim 1, it is characterised in that：The anti-explosion safety grid are gate inhibition's power supply anti-explosion safety Grid, its voltage regulation unit include two identical parallel branches, and each parallel branch includes a voltage-regulator diode.
- 5. anti-explosion safety grid according to claim 4, it is characterised in that：The pressure-resistant of the voltage-regulator diode is 11V.
- 6. anti-explosion safety grid according to claim 1, it is characterised in that：The anti-explosion safety grid are that gate inhibition's door lock power supply is explosion-proof Guard grating, its voltage regulation unit include two identical parallel branches, and each parallel branch includes two pressure-resistant different voltage stabilizings Diode series connect.
- 7. anti-explosion safety grid according to claim 6, it is characterised in that：Voltage-regulator diode in same parallel branch, one It is individual it is pressure-resistant be 6.2V, it is 8.2V that another is pressure-resistant.
- 8. anti-explosion safety grid according to claim 1, it is characterised in that：Input, output port have the wiring with buckle Terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721220921.4U CN207184050U (en) | 2017-09-22 | 2017-09-22 | A kind of anti-explosion safety grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721220921.4U CN207184050U (en) | 2017-09-22 | 2017-09-22 | A kind of anti-explosion safety grid |
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| Publication Number | Publication Date |
|---|---|
| CN207184050U true CN207184050U (en) | 2018-04-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721220921.4U Active CN207184050U (en) | 2017-09-22 | 2017-09-22 | A kind of anti-explosion safety grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265969A (en) * | 2019-07-25 | 2019-09-20 | 重庆光可巡科技有限公司 | A kind of ia type power safety grid circuit of dual-protection circuit |
-
2017
- 2017-09-22 CN CN201721220921.4U patent/CN207184050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110265969A (en) * | 2019-07-25 | 2019-09-20 | 重庆光可巡科技有限公司 | A kind of ia type power safety grid circuit of dual-protection circuit |
| CN110265969B (en) * | 2019-07-25 | 2021-06-29 | 重庆光可巡科技有限公司 | Ia type power supply safety barrier circuit of double protection circuit |
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