CN205029296U - Double -deck explosion -proof box - Google Patents
Double -deck explosion -proof box Download PDFInfo
- Publication number
- CN205029296U CN205029296U CN201520673223.4U CN201520673223U CN205029296U CN 205029296 U CN205029296 U CN 205029296U CN 201520673223 U CN201520673223 U CN 201520673223U CN 205029296 U CN205029296 U CN 205029296U
- Authority
- CN
- China
- Prior art keywords
- shell body
- inner housing
- double
- cavity
- proof box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The utility model particularly relates to a double -deck explosion -proof box, including two cavitys through sealing washer fixed connection, the both ends of cavity are constriction portion, and the middle part of cavity forms splicing chamber, the middle part of a cavity lateral wall is opened and is let out the ability hole, the cavity includes the shell body and overlaps the interior casing of establishing in its inside, the middle part of interior casing is the corrugate structure, the lateral wall thickness of interior casing is lighter than the lateral wall thickness of shell body, the joint has conical fire prevention sealing plug in the constriction portion. The utility model has the advantages of under the same condition of NULL, impact toughness is better.
Description
Technical field
The utility model is specifically related to a kind of cable joint explosion-protection equipment, is specifically related to a kind of double-layer explosion-proof box.
Background technology
After cable laying is good, in order to become a continuous print circuit, each section of line must connect as a whole, and these tie points are just called cable joint.Because present most of cable is all embedded in underground, poor working environment, cable joint easily produces sparking, short circuit because of aging and even blasts in Long-Time Service, causes economic heavy losses even to threaten personal life security.Due to current China cable tunnel limited amount, the number of cables in each cable tunnel is more, when after a cable blast on fire, will light other cables, causes subsequent explosion, causes cable tunnel inner cable damage.In order to prevent cable joint place from rear initiation second accident on fire occurring, cable joint place all adopts armored cassette.In order to ensure that armored cassette can bear certain impact, current armored cassette all adopts certain thickness metal foil punch process to form.But when the temperature is low, the deformability of metal reduces, and by easily cracked during blast impulse, broken sheet metal also can cause second accident.If increase wall thickness, not only increase armored cassette deadweight, and be not easy to install.
Utility model content
The utility model is intended to provide a kind of impact toughness better double-layer explosion-proof box.
Double-layer explosion-proof box in this programme, comprise two cavitys be fixedly connected with by sealing ring, the two ends of described cavity are necking section, the formation junction chamber, middle part of cavity, the middle part of a described cavity wall has lets out energy hole, described cavity comprises shell body and sheathed inner housing therein, and the middle part of described inner housing is wave structure; The sidewall thickness of described inner housing is less than the sidewall thickness of shell body; The fire proof seal plug of taper is connected with in described necking section.
The utility model has the advantages that: (1) is set in inner housing outside due to shell body, shell body pressure is balanced, better can disperse the impulsive force of exploding when cable joint is blasted; (2) because cavity adopts double layer design, inner housing is identical with the wall thickness of armored cassette in prior art with the thickness summation of shell body, under identical temperature environment conditions, and thin-walled more yielding, so toughness is high, the ability of resisting shock loading is stronger; (3) because the middle part of inner housing is wave structure, when bearing blast impulse, deformation is larger, prevents inner housing from bursting further; (4) owing to being connected with the fire proof seal plug of taper in necking section, fire proof seal plug is pushed necking section by the air of high-temperature expansion, can prevent the energy of explosion time from going out from necking section, destroy external cable.
Further, described fire proof seal plug comprises the fire prevention packing ring, heat insulating mattress and the sealing plug that set gradually, and the external diameter of described fire prevention packing ring is greater than the diameter of necking section compared with large port, and described sealing plug is pyramidal structure, and sealing plug and heat insulating mattress are all positioned at necking section.When cable joint explosion time, fire prevention packing ring can prevent the cable burnt from heat insulating mattress and sealing plug being ignited, and heat insulating mattress can prevent sealing plug to be subject to high temperature melt.
Further, the middle part of described shell body is provided with the groove of M type.This groove can increase the deformation quantity of shell body when being subject to blast impulse, prevents it from bursting generation fragment.
Further, be provided with thermal insulation layer between described shell body and inner housing, this thermal insulation layer also can play the effect of buffering.
Accompanying drawing explanation
Fig. 1 is the structural representation in the utility model double-layer explosion-proof box embodiment after cavity installation;
Fig. 2 is the structural representation in the utility model double-layer explosion-proof box embodiment before cavity installation;
Fig. 3 is the structural representation of the utility model double-layer explosion-proof box embodiment;
Fig. 4 is the enlarged drawing of A in Fig. 3.
In figure, 1 is inner housing, and 2 is shell body, and 3 for letting out energy hole, and 4 is necking section, and 5 is sealing ring, and 6 is cable, and 7 is sealing plug, and 8 is heat insulating mattress, and 9 is fire prevention packing ring.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
As shown in Figures 1 to 4, cavity comprises shell body 2 and inner housing 1, and the summation of inner housing 1 and shell body 2 wall thickness is suitable with armored cassette wall thickness of the prior art, under identical temperature environment conditions; thin-walled more yielding, so toughness is high, the ability of opposing shock loading is stronger; The sidewall thickness of inner housing 1 is less than the sidewall thickness of shell body 2.Shell body 2 and inner housing 1 both sides are all integrally formed with sealing ring 5, shell body 2 is enclosed within inner housing 1 outside and fits with inner housing 1, two assembly housing bodies 2 and inner housing 1 are bolted to connection, when cable 6 joint is blasted, after the impulsive force that inner housing 1 is exploded, because shell body 2 and inner housing 1 are fitted, shell body 2 pressure is balanced, better can disperse the impulsive force of exploding, reduce the intensity of local assault power, prevent it from bursting.The two ends connecting rear chamber are necking section 4, and middle part forms the junction chamber of hollow.In order to increase the deformation quantity of inner housing 1 and shell body 2, the middle part of inner housing 1 is stamping forming wave structure, and the middle part punch forming of shell body 2 has three cross sections to be the groove of M type.One assembly housing body 2 and inner housing 1 all having two, let out can hole 3, and letting out on shell body 2 can overlap with the letting out energy hole 3 on inner housing 1 in hole 3.
For avoiding the energy of cable 6 joint explosion time to go out from necking section 4, in necking section 4, be connected with the fire proof seal plug of taper.This fire proof seal plug comprises the fire prevention packing ring 9, heat insulating mattress 8 and the sealing plug 7 that set gradually.The external diameter of fire prevention packing ring 9 is greater than the diameter of necking section 4 compared with large port, and sealing plug 7 is that its small end of pyramidal structure is away from junction chamber.Work as explosion time, fire proof seal plug 7 is tightly pressed into necking section 4 by the air of high-temperature expansion, can prevent the energy of explosion time from going out from necking section 4, destroy external cable 6.Packing ring 9 of simultaneously preventing fires can prevent the cable 6 burnt from heat insulating mattress 8 and sealing plug 7 being ignited, and heat insulating mattress 8 can prevent sealing plug 7 by high temperature melt.
In order to ensure shell body 2 uniform force further, thermal insulation layer can be provided with between shell body 2 and inner housing 1, and this thermal insulation layer also can play the effect of buffering.
During use, be first located at by fire proof seal plug sleeve on two cables 6 needing to connect, after being connected by cable 6, be placed in by joint in junction chamber, the position of adjustment fire proof seal plug, makes it be connected to necking section 4.By bolt two assembly housing bodies 2 be connected with inner housing 1 afterwards and fix.
Above-described is only embodiment of the present utility model, and in scheme, the general knowledge such as known concrete structure and characteristic does not do too much description at this.Should be understood that; for a person skilled in the art, under the prerequisite not departing from the utility model structure, some distortion and improvement can also be made; these also should be considered as protection range of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.
Claims (4)
1. double-layer explosion-proof box, comprise two cavitys be fixedly connected with by sealing ring, the two ends of described cavity are necking section, the formation junction chamber, middle part of cavity, the middle part of a described cavity wall has lets out energy hole, it is characterized in that: described cavity comprises shell body and sheathed inner housing therein, the middle part of described inner housing is wave structure; The sidewall thickness of described inner housing is less than the sidewall thickness of shell body; The fire proof seal plug of taper is connected with in described necking section.
2. double-layer explosion-proof box according to claim 1, it is characterized in that: described fire proof seal plug comprises the fire prevention packing ring, heat insulating mattress and the sealing plug that set gradually, the external diameter of described fire prevention packing ring is greater than the diameter of necking section compared with large port, described sealing plug is pyramidal structure, and sealing plug and heat insulating mattress are all positioned at necking section.
3. double-layer explosion-proof box according to claim 1, is characterized in that: the middle part of described shell body is provided with the groove of M type.
4. double-layer explosion-proof box according to claim 1, is characterized in that: be provided with thermal insulation layer between described shell body and inner housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673223.4U CN205029296U (en) | 2015-09-02 | 2015-09-02 | Double -deck explosion -proof box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520673223.4U CN205029296U (en) | 2015-09-02 | 2015-09-02 | Double -deck explosion -proof box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205029296U true CN205029296U (en) | 2016-02-10 |
Family
ID=55261800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520673223.4U Expired - Fee Related CN205029296U (en) | 2015-09-02 | 2015-09-02 | Double -deck explosion -proof box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205029296U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913947A (en) * | 2016-06-03 | 2016-08-31 | 北京华远高科电缆有限公司 | Mineral insulated pre-branch-division fireproof cable possessing aluminum shell |
| CN108599088A (en) * | 2018-04-28 | 2018-09-28 | 国网北京市电力公司 | Cable connector protective device |
| CN112421558A (en) * | 2020-12-01 | 2021-02-26 | 深圳供电局有限公司 | Power cable intermediate head protector |
| CN113889963A (en) * | 2021-10-15 | 2022-01-04 | 重庆长信实业有限公司 | Flame-retardant structure of explosion-proof box |
-
2015
- 2015-09-02 CN CN201520673223.4U patent/CN205029296U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913947A (en) * | 2016-06-03 | 2016-08-31 | 北京华远高科电缆有限公司 | Mineral insulated pre-branch-division fireproof cable possessing aluminum shell |
| CN108599088A (en) * | 2018-04-28 | 2018-09-28 | 国网北京市电力公司 | Cable connector protective device |
| CN112421558A (en) * | 2020-12-01 | 2021-02-26 | 深圳供电局有限公司 | Power cable intermediate head protector |
| CN112421558B (en) * | 2020-12-01 | 2022-06-21 | 深圳供电局有限公司 | Power cable intermediate head protector |
| CN113889963A (en) * | 2021-10-15 | 2022-01-04 | 重庆长信实业有限公司 | Flame-retardant structure of explosion-proof box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160210 Termination date: 20170902 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |