CN209264882U - Intrinsic safety type electrostatic grounding warning device - Google Patents
Intrinsic safety type electrostatic grounding warning device Download PDFInfo
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- CN209264882U CN209264882U CN201822126917.2U CN201822126917U CN209264882U CN 209264882 U CN209264882 U CN 209264882U CN 201822126917 U CN201822126917 U CN 201822126917U CN 209264882 U CN209264882 U CN 209264882U
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Abstract
A kind of intrinsic safety type electrostatic grounding warning device, to solve, existing electrostatic warning device accuracy rate is low, is not able to satisfy the technical issues of explosion-proof place demand.It includes " non-" logic switch, explosion-proof alarm；For being serially connected in ground line, the load end and explosion-proof alarm of " non-" logic switch are connected in series the control terminal of " non-" logic switch；" non-" logic switch is mounted in armored cassette, and the electric wire outside the armored cassette is explosion-proof electric wire, and at the cable port of the armored cassette, the explosion-proof electric wire is fixed together with the armored cassette.Its alarm accuracy rate is high, can satisfy explosion-proof place demand.
Description
Technical field
The utility model relates to a kind of warning devices, and in particular to a kind of intrinsic safety type electrostatic grounding warning device.
Background technique
Need to consider influence of the electrostatic to equipment, operation safety in certain Code in Hazardous Special Locations, such as in danger areas such as gas stations
Domain, petrol station oiling person need to eliminate the electrostatic of body movement generation when operating programme-controlled.To guarantee safety, the static elimination of ground connection
The ground line of device need be it is intact, according to " fault-safety principle " principle, need equipment being capable of the sending when being grounded damage
Alarm reminds maintenance mans to search failure, prosthetic appliance in time, it is therefore desirable to have electrostatic grounding warning device.
The Chinese patent literature CN104635106A for being disclosed on May 20th, 2015 describes a kind of anti-static grounding alarm
Method, including link circuit detection circuit, earth-return circuit detection circuit, twin-core cable and double ground lines, the twin-core cable
One end and two ports of link circuit detection circuit are respectively connected with, and two clamping plates of the other end and earth clip are respectively connected with, institute
The one end for stating double ground lines is connected with two ports of earth-return circuit detection circuit, and grounding body is respectively connected at the other end and two,
The link circuit detection circuit, earth-return circuit detection circuit are connected with warning circuit respectively.It is grounded by detection
Whether the damage of the determining ground line of resistance, the setting of test point can significantly affect its accuracy rate.
In addition, since these places are to requirement of explosion proof height, it is also desirable to consider the electrostatic grounding alarm for being mounted on these places
Can equipment meet actual needs.
Utility model content
The goal of the invention of the utility model is to provide a kind of intrinsic safety type electrostatic grounding warning device, to solve existing electrostatic
Warning device accuracy rate is low, is not able to satisfy the technical issues of explosion-proof place demand.
In order to solve the above technical problems, the utility model adopts the following technical solution:
Design a kind of intrinsic safety type electrostatic grounding warning device, including " non-" logic switch, explosion-proof alarm；It is described " non-" to patrol
The control terminal of switch is collected for being serially connected in ground line, the load end and explosion-proof alarm of " non-" logic switch are connected in series；Institute
It states " non-" logic switch to be mounted in armored cassette, the electric wire outside the armored cassette is explosion-proof electric wire, in the line of the armored cassette
At cable mouth, the explosion-proof electric wire is fixed together with the armored cassette.
Preferably, described " non-" logic switch is closed type relay.
Preferably, one of terminal of the control terminal of described " non-" logic switch is connected with antistatic by explosion-proof electric wire
It is grounded clamp, another terminal is connected with the earthing pole for ground connection by explosion-proof electric wire.
Further, the anti-static grounding clamp selects the strength ground connection clamp that can abolish paint insulating layer.
Preferably, anti-explosion electric line selection spiral antistatic PU cable.
Preferably, the explosive-proof grade of the armored cassette >=II CT6 explosive-proof grade.
Compared with prior art, the utility model has the beneficial effects that using " non-" logic switch, any ground line open circuit
Afterwards, " non-" logic switch must be triggered, electrostatic warning device alarm accuracy rate is high；" non-" logic switch is arranged in armored cassette,
It can satisfy explosion-proof place demand.
Detailed description of the invention
Fig. 1 is the structure chart of intrinsic safety type electrostatic grounding warning device.
Fig. 2 is the schematic diagram of intrinsic safety type electrostatic grounding warning device.
In figure, 1- explosion-proof alarm, 2- armored cassette, 3- " non-" logic switch, 4- anti-static grounding clamp, 41- abolishes tooth,
5- earthing pole, 6- electric wire, the explosion-proof electric wire of 61-, the explosion-proof electric wire of 62-.
Specific embodiment
Illustrate specific embodiment of the present utility model with reference to the accompanying drawings and examples, but following embodiment only uses
It is described in detail the utility model, does not limit the scope of the utility model in any way.
Embodiment: a kind of intrinsic safety type electrostatic grounding warning device, referring to Fig. 1, including " non-" logic switch 3, anti-explosion alarming
Device 1；The control terminal of " non-" logic switch 3 is for being serially connected in ground line, the load end and explosion-proof alarm 1 of " non-" logic switch
It is connected in series；" non-" logic switch 3 is mounted in armored cassette 2, and the electric wire 6 outside armored cassette 2 is explosion-proof electric wire, in armored cassette 2
Cable port at, explosion-proof electric wire 6 is fixed together with armored cassette 2.Ground line preferably chooses the explosion-proof electric wire of two-conductor line, such to connect
Ground wire is not easy open circuit.
" non-" logic switch 3 selects closed type relay, and selects Y32F-SS-124DM-5 type relay, its coil
Voltage is DC5V, and contact parameter is 5A 30VDC/5A 250VAC.30VDC is human safety voltage, at this moment, " non-" logic switch
The power supply of load end can select DC power supply, such as battery, battery is preferably also secured in armored cassette, when DC power supply is
When outside provides, the electric wire for connecting external dc power also needs to be explosion-proof electric wire.
Referring to Fig. 1, one of terminal of the control terminal of " non-" logic switch 3 is connected with antistatic by explosion-proof electric wire 61
It is grounded clamp 4, another terminal is connected with the earthing pole 4 for ground connection by explosion-proof electric wire 62.Anti-static grounding clamp 4 is prevented
Quick-fried electric wire 61, the control section of " non-" logic switch 3, explosion-proof electric wire 62, earthing pole 4 form ground line above-mentioned.Explosion-proof electric wire
61, explosion-proof electric wire 62 can choose spiral antistatic PU cable.The selection of anti-static grounding clamp 4 can abolish paint insulating layer
Strength be grounded clamp, referring to Fig. 1, at the jaw of anti-static grounding clamp 4, upper clamp part and lower pincers portion are equipped with and abolish tooth
41, paint insulating layer can be destroyed by abolishing tooth 41.The explosive-proof grade of armored cassette 2 is preferably selected >=II CT6 explosive-proof grade.It is explosion-proof
Alarm 1 selects commercially available acousto-optical explosion-proof alarm device.Referring to Fig. 1, explosion-proof alarm 1 is preferably fixed together with armored cassette 2,
It is easy to carry in this way.
Referring to fig. 2, the load end of " non-" logic switch 3 uses 24VDC power supply, and control terminal uses 5VDC power supply, 24VDC electricity
Source, 5VDC power supply can be using batteries so that it is convenient to be arranged in armored cassette 2.When anti-static grounding clamp 4 is clipped on electric conductor
When, two electric wires of tail portion, which are formed, to be shorted, and electric current is by 5VDC anode through protective tube F1, current-limiting resistance R1, " non-" logic
Switch K1 coil, returns to battery cathode, and " non-" logic switch K1 coil obtains electric, normally-closed contact disconnection, explosion-proof alarm power-off
It does not work.When the 5 any place open circuit of anti-static grounding clamp 4 and earthing pole, " non-" logic switch K1 coil losing electricity is normally closed
Contact remains up, and explosion-proof alarm issues sound-light alarm.Control circuit is made of intrinsically safe circuit, and intrinsically safe circuit is by protective tube
F1, voltage-stabiliser tube D1, D2, D3, current-limiting resistance R1 form the intrinsically safe circuit of standard.Three voltage-stabiliser tubes meet intrinsic safety ia class requirement,
When there are two circuits when fault point still can reliably work simultaneously.Voltage-stabiliser tube limits supply voltage as 5.1V, current-limiting resistance
The operating current of 500 Ω of R1/3W, limit static earth clip are no more than 10mA.
The utility model is described in detail above in conjunction with drawings and examples, still, the skill of technical field
Art personnel, can also be to each specific in above-described embodiment it is understood that without departing from the purpose of the present invention
Parameter changes, and forms multiple specific embodiments, is the common variation range of the utility model, no longer detailed one by one herein
It states.
Claims (6)
1. a kind of intrinsic safety type electrostatic grounding warning device, including explosion-proof alarm, which is characterized in that further include that " non-" logic is opened
It closes；The control terminal of " non-" logic switch is for being serially connected in ground line, the load end and anti-explosion alarming of " non-" logic switch
Device is connected in series；" non-" logic switch is mounted in armored cassette, and the electric wire outside the armored cassette is explosion-proof electric wire, in institute
It states at the cable port of armored cassette, the explosion-proof electric wire is fixed together with the armored cassette.
2. intrinsic safety type electrostatic grounding warning device as described in claim 1, which is characterized in that " non-" logic switch is normal
Closed form relay.
3. intrinsic safety type electrostatic grounding warning device as described in claim 1, which is characterized in that the control of " non-" logic switch
One of terminal at end processed is connected with anti-static grounding clamp by explosion-proof electric wire, another terminal is connected by explosion-proof electric wire
There is the earthing pole for ground connection.
4. intrinsic safety type electrostatic grounding warning device as claimed in claim 3, which is characterized in that the anti-static grounding clamp choosing
Clamp is grounded with the strength that can abolish paint insulating layer.
5. intrinsic safety type electrostatic grounding warning device as described in claim 1, which is characterized in that the anti-explosion electric line selection spiral
Antistatic PU cable.
6. intrinsic safety type electrostatic grounding warning device as described in claim 1, which is characterized in that the explosive-proof grade of the armored cassette
>=II CT6 explosive-proof grade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126917.2U CN209264882U (en) | 2018-12-18 | 2018-12-18 | Intrinsic safety type electrostatic grounding warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126917.2U CN209264882U (en) | 2018-12-18 | 2018-12-18 | Intrinsic safety type electrostatic grounding warning device |
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| Publication Number | Publication Date |
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| CN209264882U true CN209264882U (en) | 2019-08-16 |
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| CN201822126917.2U Active CN209264882U (en) | 2018-12-18 | 2018-12-18 | Intrinsic safety type electrostatic grounding warning device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654965A (en) * | 2020-06-22 | 2020-09-11 | 广州特种机电设备检测研究院 | Electrostatic grounding device with self-detection function |
-
2018
- 2018-12-18 CN CN201822126917.2U patent/CN209264882U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654965A (en) * | 2020-06-22 | 2020-09-11 | 广州特种机电设备检测研究院 | Electrostatic grounding device with self-detection function |
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