CN103674096A - Explosive-proof device - Google Patents
Explosive-proof device Download PDFInfo
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- CN103674096A CN103674096A CN201210334514.1A CN201210334514A CN103674096A CN 103674096 A CN103674096 A CN 103674096A CN 201210334514 A CN201210334514 A CN 201210334514A CN 103674096 A CN103674096 A CN 103674096A
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- explosion
- proof casing
- proof
- end cap
- isolation device
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Abstract
The invention belongs to the field of explosive-proof electrical equipment, and in particular relates to an explosive-proof device (1) with double explosive-proof shells. The explosive-proof device comprises a first explosive-proof shell (2) used for accommodating electrical equipment, and a second explosive-proof shell (3), wherein the first explosive-proof shell (2) is arranged in the internal space of the second explosive-proof shell (3). The explosive-proof performance of electrical equipment such as a transmitter, provided with the explosive-proof device is greatly improved, so that the explosive-proof device can be used in a using environment with high requirements on explosive-proof performance. When the first explosive-proof shell (2) fails partially or completely, the explosive-proof function can be further performed through the second explosive-proof shell (3); therefore, sparks or explosion in the electrical equipment can be prevented from leaking to an external application environment.
Description
Technical field
The present invention relates to a kind of explosion isolation device.
Background technology
At present, transmitter is more and more extensive in the application of industrial control field, and it is mainly used in converting the physical quantitys such as the temperature of measured target, pressure, concentration, flow, liquid level to available standards signal.Transmitter is widely used in fields such as oil, chemical industry, weavings, because oils, chemicals and fibrous material etc. are mostly to have flammable dangerous goods, and transmitter generally need to be supplied with electric current, the inside of transmitter there will be electric fault unavoidably thus, the situation that may occur spark or short circuit, therefore the transmitter that is applied to these fields must have explosion insulation performance, thereby the unsafe factors such as the inner spark producing of transmitter or short circuit are fully enclosed in housing, make it can not leak into the outside of transmitter.
Flame proof transmitter of the prior art generally has single explosion-proof casing, and it can only require for flame proof is not too high environment, such as can only be for 1st district or 2nd district of the hazardous location classification grade of dividing according to International Electrotechnical Commission.And require in very high applied environment at explosion insulation performance, in 0th district in the hazardous location classification grade dividing according to International Electrotechnical Commission, when the in use explosion of single explosion-proof casing or while there is partial failure, concerning surrounding environment, will be breakneck.Therefore, this transmitter with single explosion-proof casing can not meet the high standard requirement of applied environment to explosion insulation performance sometimes.
Therefore, in prior art, need a kind of can improve explosion insulation performance for being for example the explosion isolation device of the electrical equipment of transmitter, electrical equipment be can be used in the stricter applied environment of explosion insulation performance requirement.
Summary of the invention
Goal of the invention of the present invention is, a kind of explosion isolation device that is intended to solve or at least alleviate existing at least one shortcoming in above-mentioned prior art is provided.
According to an aspect of the present invention, provide a kind of explosion isolation device, it comprises: the first explosion-proof casing, and it is for holding electrical equipment; And second explosion-proof casing, the first explosion-proof casing is arranged in the inner space of the second explosion-proof casing.
Employing according to above-mentioned explosion isolation device of the present invention for example for the electrical equipment of transmitter is owing to having double layer flame-proof housing, therefore there is the explosion insulation performance of raising, can be used in explosion-proof is required in very high environment, even still can provide explosion prevention function by the second explosion-proof casing in the situation that of the first explosion-proof casing explosion-proof performance partial failure, thus its can be used in general electrical apparatus for explosive atmospheres not in the environment of applicable high requirement of explosion proof.Therefore, adopting can be for carrying out collection and the transmission of various data and information in the explosion insulation performances such as oil, chemical industry, weaving require strict field according to the electrical equipment such as for transmitter of explosion isolation device of the present invention.
Accompanying drawing explanation
By referring to accompanying drawing, provide to according to the description of the specific embodiment of the present invention part, will more easily understand the features and advantages of the present invention, in the accompanying drawings:
Fig. 1 is the skeleton view illustrating according to the decomposition of explosion isolation device of the present invention;
Fig. 2 is the longitudinal sectional view illustrating according to explosion isolation device of the present invention.
Embodiment
With reference to the accompanying drawings exemplary embodiment of the invention is described in detail.To the description of illustrative embodiments, be only for demonstration object, and be never the restriction to the present invention and application or usage.
As shown in Figure 1, explosion isolation device 1 according to the present invention comprises the first explosion-proof casing 2 and the second explosion-proof casing 3, the inside of the first explosion-proof casing 2 has accommodation space, for holding the electrical equipment etc. that need to carry out flame proof, such as likely produce the electronic unit of spark or short circuit for containment circuit board, connecting part etc., the first explosion-proof casing 2 is arranged in the inner space of the second explosion-proof casing 3.The first explosion-proof casing 2 comprises housing section 21 and is arranged on the front end cap 22 on the top of housing section 21, wherein, housing section 21 parts that can be formed in one, this will be conducive to keep globality and the sealing of explosion-proof casing.In addition, according to preferred embodiment of the present invention, housing section 21 can be comprised of two parts, i.e. the circumferential wall part of housing section 21 and be arranged on the rear end cap 23 of the bottom of circumferential wall part, as clearlying show that in Fig. 2.Housing section 21 is arranged to two ingredients can be conducive to such as the electrical equipment for circuit board, connecting part etc. to the installation in the first explosion-proof casing 2, particularly when the first explosion-proof casing 2 has the darker degree of depth, the explosion-proof casing of integral type will be difficult to approach the bottom of its inner chamber, thereby is difficult to circuit board, connecting part etc. to be installed on the bottom of housing.Adopt split type the first explosion-proof casing 2 can before the electrical equipments such as mounting circuit boards, connecting part, rear end cap 23 and the circumferential wall of housing section 21 be taken apart, after the installation of electrical equipment such as for circuit board, connecting part etc. is to rear end cap 23, more circumferential wall part is assembled on rear end cap 23, thereby can realizes circuit board, connecting part etc. to the installation with the bottom of deep explosion-proof casing of spending.
According in the preferred embodiment of first explosion-proof casing 2 with Split type casing portion 21 of the present invention, front end cap 22 and rear end cap 23 are all threaded connection the circumferential wall that mode is mounted to housing section 21.In order to ensure the sealing of the first explosion-proof casing 2, at rear end cap 23 and the joint of the circumferential wall of housing section 21, be provided with seal 26.Equally, joint between front end cap 22 and housing section 21 is provided with seal 25, thereby guarantee the tight seal between front end cap 22 and housing section 21, and between the circumferential wall of front end cap 22, housing section 21 and rear end cap 23, limited hermetic space thus, for electrical equipments such as accommodating circuit board, connecting parts.Wherein, seal 25 and seal 26 can be preferably the sealing rings of being made by materials such as rubber, teflon, or can be fluid sealants.When the electrical equipments such as the circuit board in being contained in the first explosion-proof casing 2, connecting part produce spark or blast, first the first explosion-proof casing 2 is enclosed in its inside by spark or blast, avoid spark or blast to external diffusion, thereby guarantee the outside security of the first explosion-proof casing 2.
The front end cap 22 of the first explosion-proof casing 2 can be integral type end cap, also can screwed staged connecting portion 221, top board 222 and 223 assemblings of top board shackle member, consist of as illustrated in fig. 2.The lower end of staged connecting portion 221 is threaded connection the circumferential wall to housing section 21, the upper end of staged connecting portion 221 fits together by screw thread and base plate shackle member 223, and the top board 222 at the top of order of covering ladder type connecting portion 221 is arranged between staged connecting portion 221 and top board shackle member 223 hermetically.Good sealing in order to ensure front end cap 22, can at the joint between staged connecting portion 221 and top board shackle member 223 and the joint between top board shackle member 223 and top board 222, seal 224 and seal 225 be set respectively, at this, seal 224 and seal 225 can be made by the material identical with seal 26 with seal 25.
Further, the first explosion-proof casing 2 is also provided with cable and introduces parts 24, cable is introduced on the circumferential wall of front end cap 22, rear end cap 23 or housing section 21 that parts 24 can be arranged on the first explosion-proof casing 2, and this can optionally arrange according to the needs of practical application.In preferred embodiment according to the present invention, two cables are introduced on the circumferential wall of housing section 21 that parts 24 are arranged on the first explosion-proof casing 2, and stretch out from the outer wall of the circumferential wall of housing section 21.Cable is introduced parts 24 can be for the electrical equipment access cables such as circuit board, connecting part to being positioned at the first explosion-proof casing 2, thereby power supply are provided or transmit signal for it.Special-purpose cable is introduced parts 24 can provide good sealing for cable introducing portion, thereby for adopting the electrical equipment such as for circuit board, connecting part etc. of the first explosion-proof casing 2 that better explosion insulation performance is provided.
As shown in Figure 2, the explosion isolation device 1 for transmitter according to the present invention also comprises that the second explosion-proof casing 3, the second explosion-proof casings 3 have than the larger volume of the first explosion-proof casing 2, and the first explosion-proof casing 2 is contained in its inner space.The second explosion-proof casing 3 can have the structure identical with the first explosion-proof casing 2, and certainly, its structure also can be different from the first explosion-proof casing 2.In embodiment as illustrated in fig. 1 and 2 according to the present invention, the second explosion-proof casing 3 comprises enclosure body 31 and anterior end cap 32, and anterior end cap 32 is monolithic construction, by injection moulding or molded one-shot forming.Certainly, anterior end cap 32 also can have the structure as the front end cap 22 of the first explosion-proof casing 2.Anterior end cap 32 is threaded connection and is mounted to enclosure body 31, in like manner, in order to ensure the good sealing of the second explosion-proof casing 3, can seal be set at anterior end cap 32 and the joint of enclosure body 31.In addition, the enclosure body 31 of the second explosion-proof casing 3 also can have the structure identical with the housing section 21 of the first explosion-proof casing 2, be that enclosure body 31 can consist of circumferential wall part and rear portion end cap, rear portion end cap can be threaded connection on the circumferential wall part that mode is assembled to enclosure body 31, and preferably can between the circumferential wall part of enclosure body 31 and rear portion end cap, seal be set.The enclosure body 31 by setting with rear portion end cap, can operate by the various electrical equipments that rear portion end cap is pulled down being arranged in the second explosion-proof casing 3, and is conducive to wiring and other associative operations of the second explosion-proof casing 3.
As illustrated in fig. 1 and 2, the second explosion-proof casing 3 also comprises the cable introducing portion 34 being arranged in anterior end cap 32 or enclosure body 31, cable introducing portion 34 stretches out from the outer wall of anterior end cap 32 or enclosure body 31, for the inside that cable is introduced to the second explosion-proof casing 3, thereby provide power supply or signal transmission for being positioned at the electrical equipments such as transmitter of the second explosion-proof casing 3.It should be noted that, being arranged on cable introducing portion 34 on the second explosion-proof casing 3 should introduce parts 24 and adapt with being arranged on cable on the first explosion-proof casing 2, so that cable can be smoothly through the electrical equipment that the second explosion-proof casing 3 and the first explosion-proof casing 2 are connected to explosion-proof casing inside.In an embodiment according to the present invention, two cable introducing portions 34 are arranged on the circumferential wall of enclosure body 31 of the second explosion-proof casing 3.When the first explosion-proof casing 2 is contained in the second explosion-proof casing 3 when interior, cable on the first explosion-proof casing 2 is introduced parts 24 and is generally aimed at the cable introducing portion 34 on the second explosion-proof casing 3, thus be convenient to cable from outside, be introduced directly into be positioned at the first explosion-proof casing 2 such as the electrical equipment that is circuit board, connecting part etc.The first explosion-proof casing 2 can be arranged in the second explosion-proof casing 3 by variety of way known in the art, such as fixing by bonding, welding, bolt and the connected mode such as clamping is installed, thereby forms the shell of transducer with double flame-proof housing.Having can be in the very high environment of requirement of explosion proof according to the electrical equipment of double flame-proof housing of the present invention.Even if there is the first explosion-proof casing 2 of flame proof function in use procedure inner generation spark or blast, first by the first explosion-proof casing 2 isolation spark or blasts, even if having part spark or blast to leak from the first explosion-proof casing 2, the second explosion-proof casing 3 can also be enclosed in spark and blast in the second explosion-proof casing 3 further.Therefore, the transmitter with double flame-proof housing can improve the explosion insulation performance of transmitter widely, can be in the very high field of requirement of explosion proof.
Although embodiment shown in the drawings according to the present invention has adopted columnar explosion isolation device 1, and the first explosion-proof casing 2 of explosion isolation device 1 has substantially similar shape with the second explosion-proof casing 3, but those of ordinary skills can expect, explosion isolation device 1 can adopt other shapes, such as, it can be cube, cone, the shapes such as spheroid, and the first explosion-proof casing 2 of explosion isolation device 1 and the second explosion-proof casing 3 can have different shapes, such as, the second explosion-proof casing 3 can be cylindrical shape, and the first explosion-proof casing 2 can be cube or rectangular shape, now only the cable on the first explosion-proof casing 2 need to be introduced to basic aligning of cable introducing portion 34 on parts 24 and the second explosion-proof casing 3.
In addition, in the description of above-described embodiment, explosion isolation device 1 for transmitter comprises double housing, i.e. the first explosion-proof casing 2 and the second explosion-proof casing 3, but the explosion isolation device 1 for transmitter according to the present invention can comprise triple or more multiple housing, the installation relation of each housing is as according to the installation relation of the first explosion-proof casing 2 of the present invention and the second explosion-proof casing 3, and multiple housing is set in together, and can meet thus flame proof is required to higher applied environment.User can select according to concrete application demand shell tuple or the number of plies of transmitter.
Although in the process that present invention is described, take transmitter as example, can be for other electrical equipments according to explosion isolation device of the present invention, such as can be for the flame proof of some sensor, electronic circuit and similar device.In addition,, in explosion isolation device according to the present invention, for the ease of the electrical equipment being contained in explosion isolation device is observed, can the anterior end cap 32 of the front end cap 22 of the first explosion-proof casing 2 or the second explosion-proof casing 3 be arranged to transparent.Further, in the situation that adopt split type front end cap 22 as shown in Figure 2, can top board 222 be arranged to transparent.
Below to making according to a preferred embodiment of the invention brief overview.
According to an aspect of the present invention, on the first explosion-proof casing, be provided with cable and introduce parts, and on the second explosion-proof casing, be provided with cable introducing portion.Owing to being provided with respectively cable on the first explosion-proof casing and the second explosion-proof casing, introduce parts and cable introducing portion, can will be used to the electrical equipment in explosion isolation device to provide the cable of power supply and transmission signal to be incorporated into the inside of the first explosion-proof casing and the second explosion-proof casing easily thus, and can provide tight sealing for special-purpose cable path, thereby guarantee the explosion insulation performance of the first explosion-proof casing and the second explosion-proof casing.
Preferably, the first explosion-proof casing comprises housing section and front end cap, and the second explosion-proof casing comprises enclosure body and anterior end cap.By explosion-proof casing being arranged to have the form of lid, can be so that the manufacture of explosion isolation device and assembling.
According to a further aspect of the invention, cable is introduced on the circumferential wall of housing section that parts are arranged on the first explosion-proof casing, and cable introducing portion is arranged on the circumferential wall of enclosure body of the second explosion-proof casing.The cable introducing parts and the cable introducing portion that are arranged on circumferential wall can make the access of cable convenient, and are more conducive to the stability of anti-electrical equipment.
Preferably, in the time of in the first explosion-proof casing is arranged on the second explosion-proof casing, cable is introduced parts and cable introducing portion rough alignment.The cable introducing portion that cable on the first explosion-proof casing of formation rough alignment is introduced on parts and the second explosion-proof casing can make cable have the shortest length between the first explosion-proof casing and the second explosion-proof casing, can save cable consumption thus, and be conducive to provide good sealing for cable access place.
According to a further aspect of the present invention, the housing section of the first explosion-proof casing also comprises rear end cap.Preferably, rear end cap is threaded connection on the circumferential wall that mode is assembled to housing section.The housing section of the first explosion-proof casing is arranged to rear end cap to be more conducive to the installation of the electrical equipments such as circuit board, connecting part and to fix with circumferential wall two parts, this is more favourable for first explosion-proof casing with the larger degree of depth, because the shell of transducer that the degree of depth is too large will be not easy to approach from inside the diapire of shell of transducer, thereby is difficult to the installation of electrical equipments such as circuit board, connecting part to be fixed on the diapire of housing.Can be by pulling down diapire according to shell of transducer of the present invention, so by installation of electrical equipments such as circuit board, connecting parts to diapire.
According to an also aspect of the present invention, the housing section of the first explosion-proof casing and front end cap are threaded connection mode and are assembled together.This connected mode of housing section and front end cap can be guaranteed sealing between the two effectively, can guarantee thus the explosion insulation performance of transmitter itself.Preferably, the joint between housing section and front end cap is provided with seal, thereby between provides tighter sealing, and the explosion insulation performance of further raising is provided for flame proof the first explosion-proof casing thus.Further preferably, seal can be sealing ring or fluid sealant.
According to another aspect of the present invention, the front end cap of the first explosion-proof casing comprises screwed staged connecting portion, top board and top board shackle member, the bottom of staged connecting portion is threaded connection the housing section that mode is assembled to the first explosion-proof casing, the top of staged connecting portion and top board shackle member are threaded connection mode and are assembled together, and top board is assemblied between staged connecting portion and top board shackle member.In the time can not meeting some high-level requirement of explosion proof by die casting or stamping forming monomer-type end cap due to moulding process, can adopt according to the split type front end cap described in the present embodiment, between each ingredient of front end cap, adopt to be threaded to meet the requirement of shell of transducer to explosion-proof performance.In addition, each ingredient of split type front end cap can adopt different materials, such as adopting the material that intensity is larger being subject to the top that potential impact is large, and the sidewall that is subject to the front end cap that potential impact is less can adopt intensity less material relatively, can adopt according to actual needs thus different materials to manufacture each building block of front end cap, thereby can save material cost.
According to another aspect of the present invention, at the joint between staged connecting portion and housing section, be respectively arranged with seal at the joint between staged connecting portion and top board shackle member and the joint between top board and top board shackle member.At each, be threadedly engaged with position the sealing effectiveness that seal can improve thread seal is set, thereby the explosion insulation performance of enhancing shell of transducer promotes its explosive-proof grade thus.Preferably, seal can be sealing ring or fluid sealant.
According to an also aspect of the present invention, the enclosure body of the second explosion-proof casing also comprises rear portion end cap.Preferably, rear portion end cap is threaded connection on the circumferential wall that mode is assembled to enclosure body.Enclosure body comprises that the second explosion-proof casing of rear portion end cap can, by rear portion end cap is pulled down from enclosure body, then operate the electronic component of the second explosion-proof casing inside, thereby make more convenient to operate.In addition, can also to cable access section, operate by dismounting rear portion end cap, such as cable access section is installed and arranged, by cable access section access cable and cable access section is sealed etc.
According to a further aspect of the invention, explosion isolation device also comprises one deck or the more multi-layered explosion-proof casing being positioned at outside the second explosion-proof casing.According to the explosion isolation device of this technical scheme of the present invention, there is multiple explosion-proof casing, what can further improve thus this explosion isolation device of employing is for example the explosive-proof grade of the electrical equipment of transmitter, can be for explosion-proof performance is required to higher environment for use.User can have according to concrete requirement of explosion proof selection the explosion isolation device of the explosion-proof casing of suitable tuple or the number of plies.
Further preferably, can be for various electrical equipments such as the accommodating circuit board for transmitter, connecting parts according to explosion isolation device of the present invention.Employing can be used in flame proof is required in very high environment according to the transmitter of explosion isolation device of the present invention, its can in use effectively prevent spark, burning or blast to external diffusion, thereby play extraordinary explosion-proof.
Although with reference to illustrative embodiments, invention has been described, but be to be understood that, the present invention is not limited to the specific embodiment of describing in detail and illustrating in literary composition, in the situation that not departing from claims limited range, those skilled in the art can make various improvement or modification to described exemplary embodiment.
Claims (18)
1. an explosion isolation device (1), comprising:
The first explosion-proof casing (2), for holding electrical equipment; And
The second explosion-proof casing (3), described the first explosion-proof casing (2) sets within it in portion space.
2. explosion isolation device as claimed in claim 1 (1) wherein, is provided with cable and introduces parts (24), and on described the second explosion-proof casing (3), be provided with cable introducing portion (34) on described the first explosion-proof casing (2).
3. explosion isolation device as claimed in claim 2 (1), wherein, described the first explosion-proof casing (2) comprises housing section (21) and front end cap (22).
4. explosion isolation device as claimed in claim 3 (1), wherein, described the second explosion-proof casing (3) comprises enclosure body (31) and anterior end cap (32).
5. explosion isolation device as claimed in claim 4 (1), wherein, described cable is introduced on the circumferential wall of described housing section (21) that parts (24) are arranged on described the first explosion-proof casing (2), and described cable introducing portion (34) is arranged on the circumferential wall of described enclosure body (31) of described the second explosion-proof casing (3).
6. explosion isolation device as claimed in claim 5 (1), wherein, in the time of in described the first explosion-proof casing (2) is arranged on described the second explosion-proof casing (3), described cable is introduced parts (24) and described cable introducing portion (34) rough alignment.
7. explosion isolation device as claimed in claim 4 (1), wherein, the described housing section (21) of described the first explosion-proof casing (2) also comprises rear end cap (23).
8. explosion isolation device as claimed in claim 7 (1), wherein, described rear end cap (23) mode of being threaded connection is assembled on the circumferential wall of described housing section (21).
9. explosion isolation device as claimed in claim 4 (1), wherein, the described housing section (21) of described the first explosion-proof casing (2) is assembled together with described front end cap (22) mode of being threaded connection.
10. explosion isolation device as claimed in claim 9 (1), wherein, the joint between described housing section (21) and described front end cap (22) is provided with seal (25).
11. explosion isolation devices as claimed in claim 10 (1), wherein, described seal is sealing ring or fluid sealant.
12. explosion isolation devices as claimed in claim 4 (1), wherein, the described front end cap (22) of described the first explosion-proof casing (2) comprises screwed staged connecting portion (221), top board (222) and top board shackle member (223), the bottom of described staged connecting portion (221) is threaded connection the described housing section (21) that mode is assembled to described the first explosion-proof casing (2), the top of described staged connecting portion (221) and described top board shackle member (223) mode of being threaded connection are assembled together, described top board (222) is assemblied between described staged connecting portion (221) and described top board shackle member (223).
13. explosion isolation devices as claimed in claim 12 (1), wherein, at the joint between described staged connecting portion (221) and described housing section (21), be respectively arranged with seal (25,224,225) at the joint between described staged connecting portion (221) and described top board shackle member (223) and the joint between described top board (222) and described top board shackle member (223).
14. explosion isolation devices as claimed in claim 13 (1), wherein, described seal (25,224,225) is sealing ring or fluid sealant.
15. explosion isolation devices as claimed in claim 4 (1), wherein, the described enclosure body (31) of described the second explosion-proof casing (3) also comprises rear portion end cap.
16. explosion isolation devices as claimed in claim 15 (1), wherein, described rear portion end cap is threaded connection on the circumferential wall that mode is assembled to described enclosure body (31).
17. explosion isolation devices (1) as described in any one in claim 1-16, wherein, described explosion isolation device (1) also comprises one deck or the more multi-layered explosion-proof casing being positioned at outside described the second explosion-proof casing (3).
18. explosion isolation devices (1) as described in any one in claim 1-16, wherein, described electrical equipment is for transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334514.1A CN103674096B (en) | 2012-09-11 | 2012-09-11 | Explosion isolation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210334514.1A CN103674096B (en) | 2012-09-11 | 2012-09-11 | Explosion isolation device |
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| Publication Number | Publication Date |
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| CN103674096A true CN103674096A (en) | 2014-03-26 |
| CN103674096B CN103674096B (en) | 2017-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210334514.1A Active CN103674096B (en) | 2012-09-11 | 2012-09-11 | Explosion isolation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108705983A (en) * | 2018-05-08 | 2018-10-26 | 苏州博众机器人有限公司 | A kind of explosion isolation device and AGV |
| CN109061604A (en) * | 2018-08-29 | 2018-12-21 | 燕山大学 | A kind of explosion-proof casing of laser range finder |
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| Publication number | Publication date |
|---|---|
| CN103674096B (en) | 2017-09-29 |
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