CN208998953U - 0 area's application structure of explosion isolation type thermal couple - Google Patents
0 area's application structure of explosion isolation type thermal couple Download PDFInfo
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- CN208998953U CN208998953U CN201821705670.3U CN201821705670U CN208998953U CN 208998953 U CN208998953 U CN 208998953U CN 201821705670 U CN201821705670 U CN 201821705670U CN 208998953 U CN208998953 U CN 208998953U
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Abstract
The utility model relates to a kind of 0 area's application structures of explosion isolation type thermal couple, and thermocouple body, casing including protection level for Gb, casing are fixedly connected with 0 area equipment boundary, and thermocouple body insertion casing is located in the set body of 0 area's equipment, and is fixedly connected with casing；Thermocouple body is isolated with equipment protection rank for Ga grades of place and low danger zone by casing.The utility model realizes explosion isolation type thermal couple (resistance) products application of current maturation in the purpose in 0th area by casing connection.The explosion isolation type thermal couple (resistance) for being mistakenly installed on 0th area at present is enabled to continue to use safely by this structure, without being adjusted in large quantities in structure.The needs of simplifying equipment and install and use requirement, economy is also met while meeting safety condition.Meanwhile the application range of explosion isolation type thermal couple (resistance) product has been expanded, it solves the problems, such as that current 0th area temperature instrumentation relies on intrinsic safety type equipment, new thinking is provided for anti-explosion temperature measuring instrument field.
Description
Technical field
The utility model relates to a kind of explosion isolation type thermal couple, it is especially a kind of by equipment protection rank be Gb (the explosion-proof skill in 1st area
Art) explosion isolation type thermal couple (resistance) be applied to 0th area structure.
Background technique
Hazardous area is precisely due to there is gas flammable and explosive, steam, liquid, combustible dust or flammable fibres
It ties up and there is the place for causing fire or explosion danger.Typical hazardous area, such as explosive substance in petrochemical industry
Production, environment, underground coal mine formed in processing and storage process (due to the methane gas that is constantly penetrated in coal seam and
The working environment of formation) etc..It is wanted according to GB 3836.14-2014 (3836.14 standard of GB is equal to IEC 60079-10)
It asks, the three layers of concept in available categories region and group illustrate the division of hazardous area.
By dangerous substance in place, there are the length of time, and the hazardous area under two class difference states of matters is divided into three
Area, it may be assumed that be 0th area, 1st area and 2nd area to explosive gas atmosphere；It is 20th area, 21st area and 22nd area to combustible dust environment.Its
In, for explosive gas atmosphere, chinese national standard provides in GB3836.14-2014:
(1) 0 area: explosive gas atmosphere continuously occur or long-time existing for place.
(2) 1 areas: when operating normally, in fact it could happen that the place of explosive gas atmosphere.
(3) 2 areas: operate normally when, it is impossible to there is explosive gas atmosphere, if there is be also once in a while occur and
It is only place existing for the short time.
In industrial thermometric instrument field, thermocouple, thermal resistance are a kind of extremely extensive process temperature measuring equipments of application,
The temperature parameter of measured medium can be transformed into electric signal and pass to secondary meter, so as to read corresponding temperature number
Value.But due to being often accompanied by various inflammable, explosive explosive mixture environment in industrial site, so being applied to the environment
Thermocouple (resistance) must also have corresponding explosion-proof performance.Currently on the market the type of explosion proof construc tion of most of thermocouple (resistance) for every
Quick-fried type, equipment protection rank are Gb, that is to say, that can be only applied to risk zontation according to this kind of equipment of national Specification
In 1st area or 2nd area, be not directly applicable 0th area.But still with the presence of substantial portion of 0th area in industrial site, and mistake
The particularity of process control thermocouple (resistance) that will necessarily be used for 0 area place to be contacted with medium to carry out temperature measurement.
In fact, it is various should be only used for 1st area, the explosion isolation type thermal couple (resistance) in 2nd area is all mistakenly used in 0th area
Institute, considerably increases security risk.Therefore, it is necessary to a kind of special structures and method, and explosion isolation type thermal couple (resistance) to be made to meet 0
The condition of area's application, so that explosion isolation type thermal couple (resistance) can safely be applied to 0 area place.
Utility model content
In order to meet the requirement of 0th area of explosion isolation type thermal couple (resistance) application, the utility model provides a kind of flame-proof type thermoelectricity
0 even area's application structure, the structure structure is simple, easy for installation, can be used cooperatively explosion isolation type thermal couple (resistance) and this structure
Thermometric operation is carried out applied to 0th area, cumbersome wiring and installation procedure is avoided, solves the limitation in equipment application region, is increased
Safety is added.
To realize above-mentioned mesh, the technical solution of the utility model is: a kind of 0 area's application structure of explosion isolation type thermal couple, packet
Including protection level is the thermocouple body of Gb, casing, and described sleeve pipe is fixedly connected with 0 area equipment boundary, the thermocouple body
Insertion casing is located in the set body of 0 area's equipment, and is fixedly connected with casing；By casing by thermocouple body and equipment protection rank
It is isolated for Ga grades of places and low danger zone.
Further, the thermocouple body can be explosion isolation type thermal couple or flame-proof type thermal resistance.
Further, the thermocouple body is cooperatively connected with casing by screw thread or flange.
Further, the casing is closely connect by screw thread or flange with 0 area equipment boundary, forms sufficiently tight connect
Conjunction face meets the IP67 degree of protection of 4208 standard requirements of GB/T.
Further, described sleeve pipe material is corrosion resistant metal, and can bear pressure medium and temperature influences.
Further, there is gap, it is ensured that gravity-flow ventilation between the thermocouple body and casing.
The beneficial effects of the utility model are:
The utility model realizes explosion isolation type thermal couple (resistance) products application of current maturation by the connection of cannula structure
Purpose in 0th area.The explosion isolation type thermal couple (resistance) for being mistakenly installed on 0th area at present is enabled to continue to make safely by this structure
With without being adjusted in large quantities in structure.And required guard grating, letter when installation intrinsic safety type appliance applications are not needed
The needs of having changed equipment and installed and used requirement, economy is also met while meeting safety condition.Meanwhile the utility model
The application range for having expanded explosion isolation type thermal couple (resistance) product solves current 0th area temperature instrumentation and relies on asking for intrinsic safety type equipment
Topic, new thinking is provided for anti-explosion temperature measuring instrument field.
Detailed description of the invention
Fig. 1 is 0 area's schematic diagram of application structure of the explosion isolation type thermal couple of the utility model.
Specific embodiment
This patent is described further with reference to the accompanying drawing.
With reference to Fig. 1,0 area's application structure of the explosion isolation type thermal couple of the utility model, including thermocouple body 1, casing 2.
Thermocouple body 1 can be explosion isolation type thermal couple or flame-proof type thermal resistance.Thermocouple body 1 and casing 2 pass through screw thread or flange knot
Structure is coupled, and the area of casing 2 and 0 equipment boundary is coupled by sufficiently tight joint surface.The area of casing 2 and 0
Equipment meets the requirement in GB3836.20-2010 to transregional connection after the assembly is completed, is by equipment protection rank using casing 2
Ga grades of place and lower danger zone are isolated, and casing 2 is installed in boundary wall.Casing 2 should have screw thread or flange knot
Structure is assembled with 0 area equipment boundary, forms sufficiently tight joint surface after the assembly is completed, meets 4208 standard requirements of GB/T
IP67 degree of protection.
2 material of casing is corrosion resistant metal, and portion in contact with the electrolyte can insulating materials such as coated with PTFE, PFA as needed；Casing 2
Thickness should there are certain requirements (for example being more than or equal to 1mm), and should be able to bear pressure medium and temperature influences；Thermocouple body 1 and set
There is gap, for guaranteeing gravity-flow ventilation between pipe 2.
In diagram by taking explosion isolation type thermal couple (resistance) measures oil storage tank medium temperature as an example, by risk zontation principle, tank
It is 0th area inside body 4, it is desirable that the equipment protection rank of used equipment is Ga, and the equipment protection rank of flame-proof type equipment is Gb,
It is unsatisfactory for requiring, is not directly applicable to the measurement of oil storage tank medium temperature.After increasing by 2 structure of casing, transregional connection is realized
It is required that equipment protection rank becomes Ga/Gb, explosion isolation type thermal couple (resistance) is met for 0 region measurement oil storage tank medium temperature
Condition.
It is detected on the screw thread or flange arrangement of mouth in use, the utility model is installed on tank body 4, casing 2 and 1 shape of tank body
At sufficiently tight joint surface, it is fixed using bolt 3 or screw thread.Explosion isolation type thermal couple (resistance) and casing 2 pass through spiral shell simultaneously
Line or flange arrangement are cooperated.Meet the requirement for the antiknock device that standard applies 0th area.
Claims (6)
1. a kind of 0 area's application structure of explosion isolation type thermal couple, thermocouple body, casing including protection level for Gb, feature
Be: described sleeve pipe is fixedly connected with 0 area equipment boundary, and the thermocouple body insertion casing is located in the set body of 0 area's equipment,
And it is fixedly connected with casing；Thermocouple body and equipment protection rank are carried out for Ga grades of place and low danger zone by casing
Isolation.
2. 0 area's application structure of explosion isolation type thermal couple according to claim 1, it is characterised in that: the thermocouple body
It can be explosion isolation type thermal couple or flame-proof type thermal resistance.
3. 0 area's application structure of explosion isolation type thermal couple according to claim 1, it is characterised in that: the thermocouple body
It is cooperatively connected with casing by screw thread or flange.
4. 0 area's application structure of explosion isolation type thermal couple according to claim 1, it is characterised in that: the casing passes through
Screw thread or flange are closely connect with 0 area equipment boundary, are formed sufficiently tight joint surface, are met 4208 standard requirements of GB/T
IP67 degree of protection.
5. 0 area's application structure of explosion isolation type thermal couple according to claim 1, it is characterised in that: described sleeve pipe material is
Corrosion resistant metal, can bear pressure medium and temperature influences.
6. 0 area's application structure of explosion isolation type thermal couple according to claim 1, it is characterised in that: the thermocouple body
There is gap between casing, it is ensured that gravity-flow ventilation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821705670.3U CN208998953U (en) | 2018-10-19 | 2018-10-19 | 0 area's application structure of explosion isolation type thermal couple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821705670.3U CN208998953U (en) | 2018-10-19 | 2018-10-19 | 0 area's application structure of explosion isolation type thermal couple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208998953U true CN208998953U (en) | 2019-06-18 |
Family
ID=66804310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821705670.3U Active CN208998953U (en) | 2018-10-19 | 2018-10-19 | 0 area's application structure of explosion isolation type thermal couple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208998953U (en) |
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2018
- 2018-10-19 CN CN201821705670.3U patent/CN208998953U/en active Active
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