CN113889963A - Flame-retardant structure of explosion-proof box - Google Patents
Flame-retardant structure of explosion-proof box Download PDFInfo
- Publication number
- CN113889963A CN113889963A CN202111204983.7A CN202111204983A CN113889963A CN 113889963 A CN113889963 A CN 113889963A CN 202111204983 A CN202111204983 A CN 202111204983A CN 113889963 A CN113889963 A CN 113889963A
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- shell
- cylindrical shell
- annular plate
- ring
- explosion
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 239000000919 ceramic Substances 0.000 claims description 12
- 238000004880 explosion Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims 8
- 238000010276 construction Methods 0.000 claims 7
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention relates to a flame-retardant structure of an explosion-proof box, which comprises a cylindrical shell, wherein a cavity for accommodating a cable connector is arranged in the cylindrical shell, two ends of the cylindrical shell are necking parts, a plurality of pressure relief holes are formed in the necking parts, and balance valves are arranged in the pressure relief holes; a plurality of annular plate bodies arranged in the edges are arranged in the middle of the cylindrical shell, an annular groove is formed between the annular plate bodies, and a thermal expansion material is arranged in the annular groove; a sealing ring is arranged in the necking part; when the cable joint in the cylindrical shell explodes or burns, the temperature in the cylindrical shell rises sharply, and heat is conducted through the annular plate body, so that the thermal expansion material is heated and expanded, the thermal expansion material quickly reaches the cable joint along the expansion of the annular plate body to cover, and the cable joint and air are isolated to perform fire extinguishing treatment for the first time; the invention can effectively and actively carry out flame retardance in the explosion-proof box at the first time and can effectively prevent the cable joint from burning and diffusing.
Description
Technical Field
The invention relates to the field of explosion-proof boxes, in particular to a flame-retardant structure of an explosion-proof box.
Background
At present, after the cable intermediate joint is installed on site, the operation is affected by the surrounding environment, and the breakdown and explosion accidents of the cable intermediate joint are caused by the inevitable damage of insulation caused by external factors such as moisture invasion and mechanical stress. To above-mentioned problem, the explosion-proof box of cable joint arises in due charge, and it protects the lock with cable joint in the casing, in case cable joint takes place to puncture the explosion accident, can carry out effectual protection to other facilities of periphery under the protection of the explosion-proof box of cable, prevents the emergence of secondary damage.
When a cable joint explodes or burns, the existing cable explosion-proof box can only ensure that the generated sparks are not leaked through a sealed space inside the cable explosion-proof box, passively ensure that the fire does not spread, and cannot actively extinguish the fire.
Disclosure of Invention
In view of the above, the present invention provides a flame retardant structure of an explosion-proof box, which can actively extinguish the internal flame when the cable joint explodes or burns, thereby controlling the fire.
The flame-retardant structure of the explosion-proof box comprises a cylindrical shell, wherein a cavity for accommodating a cable connector is arranged in the cylindrical shell, two ends of the cylindrical shell are necking parts, a plurality of pressure relief holes are formed in the necking parts, and balance valves are arranged in the pressure relief holes; a plurality of annular plate bodies arranged in the middle of the cylindrical shell are arranged in the middle of the cylindrical shell, annular grooves are formed among the annular plate bodies, and thermal expansion materials are arranged in the annular grooves; a sealing ring is arranged in the necking part.
Further, the balance valve includes metal pipe body, spring and piston, and the bottom setting of metal pipe body is in on the pressure release hole, the side of metal pipe body is equipped with the through-hole, and piston and spring setting are in the metal pipe body, the one end of spring and the top fixed connection of metal pipe body, the other end and the piston fixed connection of spring, and the spring shelters from the through-hole just when being in balanced state, is equipped with a plurality of air grooves on the lateral wall of the upper segment of piston.
Furthermore, the main part of piston is the ceramic block, is equipped with the rubber ring on the side of ceramic block, the rubber ring with the inner wall contact of metal pipe body.
As an option of the invention, the cylindrical shell comprises an upper shell and a lower shell which are connected in a buckling manner, and the annular plate body comprises an upper plate body and a plate body which are respectively arranged at corresponding positions of the upper shell and the lower shell and are semi-annular; the opening edges of the upper shell and the lower shell are provided with connecting plates, and the two connecting plates are fixed by bolts after being in butt joint.
As an option of the present invention, the cylindrical housing includes two cylindrical first and second housings fixed in a butt joint manner, and a first annular plate and a second annular plate are respectively arranged in the first and second housings; the opening parts of the first shell and the second shell are connected through a buckle.
A plurality of L-shaped grooves are formed in the inner wall of the opening of the first shell, and one ends of the L-shaped grooves are radially arranged from the inner wall of the opening of the first shell to the inside; a plurality of bulges corresponding to the L-shaped grooves are arranged on the outer wall of the opening of the second shell; the opening of the second housing is inserted into the opening of the second housing and is rotationally locked.
Furthermore, the thermal expansion material is an expanded graphite layer, the expanded graphite layer is fixed by a thin film layer in the annular groove, the thickness of the expanded graphite layer is at least one tenth of the inner diameter of the cylindrical shell, the annular plate body and the inner wall of the cylindrical shell are integrally formed, the distance between the annular plate body and a cable joint is not more than 3CM, and a plurality of uniformly distributed overflow openings are radially formed in the annular plate body from the inner ring edge as a starting point.
Further, the sealing ring comprises a rubber ring, a ceramic heat insulation ring and a metal ring which are fixedly connected in sequence, and the outer ring size of the rubber ring is larger than that of the metal ring.
The invention has the beneficial effects that: the invention relates to a flame-retardant structure of an explosion-proof box, which is characterized in that an annular groove is arranged on the inner side of the middle part of a cylindrical shell, a thermal expansion material is arranged in the annular groove, and simultaneously, necking parts at two ends of the cylindrical shell are provided with pressure relief holes and balance valves, when a cable joint in the cylindrical shell explodes or burns, the temperature in the cylindrical shell rises sharply and is conducted through an annular plate body, so that the thermal expansion material is heated and expands, the thermal expansion material firstly expands along the annular plate body and quickly reaches the cable joint to cover, the cable joint and air are isolated to conduct fire extinguishing treatment for the first time, then the continuously expanded thermal expansion material is diffused to two ends along a gap between the cable joint and the annular plate body, high-pressure hot air in the shell is gathered at the necking parts at the two ends and is exhausted from the pressure relief holes and the balance valves, and the combustion is prevented from being diffused to an insulating rubber of a cable after most of the air is exhausted, the balance valve is used for balancing the internal and external air pressure of the cylindrical shell to avoid foreign matters from entering; the invention can effectively and actively carry out flame retardance in the explosion-proof box at the first time and can effectively prevent the cable joint from burning and diffusing.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without creative effort:
FIG. 1 is a schematic structural diagram according to a first embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view illustrating a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a leaf balance valve according to a first embodiment of the present invention;
FIG. 4 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view illustrating a second embodiment of the present invention;
the reference numbers are as follows: 1-upper shell, 2-lower shell, 3-sealing ring, 4-expanded graphite layer, 5-first shell, 6-second shell, 11-balance valve, 12-connecting plate, 13-upper plate, 21-lower plate, 31-metal ring, 32-ceramic heat-insulating ring, 33-rubber ring, 51-L-shaped groove, 61-protrusion, 111-metal tube, 112-spring, 113-piston, 211-opening, 1111-through hole, 1131-rubber ring, 1132-vent groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
As shown in fig. 1-5: the flame-retardant structure of the explosion-proof box comprises a cylindrical shell and a flame-retardant structure arranged inside the cylindrical shell; the cylindrical shell comprises an upper shell 1 and a lower shell 2 which are buckled up and down, the upper shell 1 and the lower shell 2 are both provided with a connecting plate 12 arranged along an opening 211, the connecting plate 12 is provided with a plurality of through holes 1111, and the upper connecting plate 12 and the lower connecting plate 12 are fixed by bolts and nuts after being aligned with the through holes 1111;
a plurality of semi-annular upper plate bodies 13 are arranged on the inner wall of the middle part of the upper shell 1, a plurality of semi-annular lower plate bodies 21 corresponding to the upper plate bodies 13 are arranged on the inner wall of the middle part of the lower shell 2, after the upper shell 1 and the lower shell 2 are buckled and connected, the upper plate bodies 13 and the lower plate bodies 21 are correspondingly spliced into a plurality of complete annular plate bodies, an annular groove is formed between adjacent annular plate bodies, a powdery expanded graphite layer 4 is filled in the annular groove, and the expanded graphite layer 4 is fixed by a film fixedly arranged in the annular groove;
two ends of the cylindrical shell formed by buckling are cone-frustum-shaped necking parts, the end parts of the two cables respectively penetrate through the necking parts and are connected inside the cylindrical shell to form a cable joint, and the cable joint is opposite to the expanded graphite layer 4; the expanded graphite can expand to more than 10 times of the original volume when the temperature exceeds 100 ℃, so that the thickness of the expanded graphite layer 4 is at least one tenth of the inner diameter of the cylindrical shell, and the expanded graphite can expand to completely cover the cable joint when high-temperature combustion is generated in the cylindrical shell;
the annular plate body and the inner wall of the cylindrical shell are integrally formed, and the distance between the annular plate body and the cable joint is not more than 3CM, so that the heat conduction between the annular plate body and the cable joint is ensured; the annular plate body is provided with a plurality of uniformly distributed overflow openings 211 from the inner ring edge as a starting point, and because the expansion volume of the expanded graphite is related to the temperature, if the temperature in the cylindrical shell is not too high, the expanded graphite directionally expands along the annular groove to cover the cable joint; if the temperature rises further, expansion continues and overflows from the opening 211 to completely cover the end of the cable and the interior of the cylindrical housing;
a pressure relief hole is formed in a necking part of the cylindrical shell, a balance valve 11 is arranged on the pressure relief hole, a sealing ring 3 is arranged in the necking part, the sealing ring 3 comprises a rubber ring 33, a ceramic heat insulation ring 32 and a metal ring 31 which are fixedly connected in sequence, the outer ring size of the rubber ring 33 is larger than that of the metal ring 31, and a cable is sleeved in the inner ring of the sealing ring 3, wherein the metal ring 31 and the ceramic heat insulation ring 32 can play a role in flame retardance, and meanwhile, when explosion and combustion are generated in the cylindrical shell, the internal air pressure is increased, the rubber ring 33 on the sealing ring 3 is in contact with the necking part and is sealed, so that the leakage of high-temperature other sparks from a gap between the necking part and the cable is avoided, and the external cable is combusted;
the balance valve 11 comprises a metal tube 111, a spring 112 and a piston 113, the bottom end of the metal tube 111 is arranged on a pressure relief hole, the side surface of the metal tube 111 is provided with a through hole 1111, the piston 113 and the spring 112 are arranged in the metal tube 111, the main body of the piston 113 is a ceramic block, the side surface of the ceramic block is provided with a rubber ring 1131, the rubber ring 1131 is in contact with the inner wall of the metal tube 111, the ceramic block is used for heat insulation, and the rubber ring 1131 is prevented from being deformed directly by heat transferred inside the cylindrical shell; one end of the spring 112 is fixedly connected with the top end of the metal tube 111, the other end of the spring 112 is fixedly connected with the piston 113, the through hole 1111 is just shielded when the spring 112 is in a balanced state, and a plurality of vent grooves 1132 are formed in the side wall of the upper section of the piston 113; the balance valve 11 is used for balancing the air pressure inside and outside the cylindrical shell, when a cable joint inside the cylindrical shell explodes or burns, the air pressure inside the cylindrical shell rises sharply to push the piston 113 to move upwards and leak out of the through hole 1111, and the gas inside leaks from the through hole 1111 until the air pressure inside and outside is almost the same, and then the through hole 1111 is blocked again; when the inside of the cylindrical housing is cooled, the air pressure is reduced, the piston 113 moves downward, and air enters the inside of the cylindrical housing along the through hole 1111 and the vent groove 1132; when the internal and external air pressures are balanced, the through hole 1111 is sealed to prevent external impurities from entering the cylindrical shell.
Example two
As shown in fig. 3 to 4, the flame retardant structure of an explosion-proof case of the present embodiment includes a cylindrical housing and a flame retardant structure disposed inside the cylindrical housing; the cylindrical shell comprises a first cylindrical shell 5 and a second cylindrical shell 6, and a first annular plate and a second annular plate are respectively arranged in the first shell 5 and the second shell 6;
a plurality of L-shaped grooves 51 are arranged on the inner wall of the opening 211 of the first shell 5, and one ends of the L-shaped grooves 51 are radially opened to the inside from the inner wall of the opening 211 of the first shell 5; the outer wall of the second housing 6 at the opening 211 is provided with a plurality of projections 61 corresponding to the L-shaped grooves 51; the opening 211 of the second housing 6 is inserted into the opening 211 of the second housing 6 and is rotationally locked;
the first annular plate and the second annular plate in the middle of the first shell 5 and the second shell 6 which are butted form an annular groove, the annular groove is filled with an annular expanded graphite layer 4 which is formed by pressing and molding a film in advance, two ends of the cylindrical shell which is formed by butting are respectively provided with a conical necking part, the necking part is provided with a pressure relief hole and a balance valve 11, and a sealing ring 3 is arranged in the necking part (the structure is consistent with that of the first embodiment, and is not described again);
two cables respectively penetrate through the necking parts of the first shell 5 and the second shell 6, the first shell 5 and the second shell 6 are fixedly butted after being connected to form a joint, and the joint just corresponds to the expanded graphite layer 4.
In summary, in the flame retardant structure of an explosion-proof box in this embodiment, an annular groove is disposed at the inner side of the middle portion of a cylindrical housing, a thermal expansion material is disposed in the annular groove, and meanwhile, the necking portions at the two ends of the cylindrical housing are provided with pressure relief holes and balance valves 11, when a cable joint inside the cylindrical housing explodes or burns, the temperature inside the cylindrical housing rises sharply and conducts heat through the annular plate body, so that the thermal expansion material expands by heat, the thermal expansion material expands along the annular plate body and quickly reaches the cable joint to cover the cable joint, the cable joint and air are isolated to perform a first time of fire extinguishing treatment, then the expanding thermal expansion material is diffused to the two ends along the gap between the cable joint and the annular plate body, high-pressure hot air inside the thermal expansion material is collected at the necking portions at the two ends and exhausted from the pressure relief holes and the balance valves 11, and the expansion of the insulation rubber of the cable is avoided after most of the air is exhausted, the balance valve 11 is used for balancing the internal and external air pressure of the cylindrical shell to avoid foreign matters from entering; the invention can effectively and actively carry out flame retardance in the explosion-proof box at the first time and can effectively prevent the cable joint from burning and diffusing.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (8)
1. The utility model provides a fire-retardant structure of explosion-proof box which characterized in that: the cable connector comprises a cylindrical shell, wherein a cavity for accommodating a cable connector is arranged in the cylindrical shell, two ends of the cylindrical shell are necking parts, a plurality of pressure relief holes are formed in the necking parts, and balance valves are arranged in the pressure relief holes; a plurality of annular plate bodies arranged in the edges are arranged in the middle of the cylindrical shell, an annular groove is formed between the annular plate bodies, and a thermal expansion material is arranged in the annular groove; a sealing ring is arranged in the necking part.
2. A fire retardant construction for an explosion proof enclosure according to claim 1, further comprising: the balance valve comprises a metal pipe body, a spring and a piston, the bottom end of the metal pipe body is arranged on the pressure relief hole, a through hole is formed in the side face of the metal pipe body, the piston and the spring are arranged in the metal pipe body, one end of the spring is fixedly connected with the top end of the metal pipe body, the other end of the spring is fixedly connected with the piston, the through hole is just shielded by the spring when the spring is in a balance state, and a plurality of vent grooves are formed in the side wall of the upper section of the piston.
3. A fire retardant construction for an explosion proof enclosure according to claim 2, further comprising: the main body of the piston is a ceramic block, a rubber ring is arranged on the side face of the ceramic block, and the rubber ring is in contact with the inner wall of the metal pipe body.
4. A fire retardant construction for an explosion proof enclosure according to claim 1, further comprising: the cylindrical shell comprises an upper shell and a lower shell which are connected in a buckling manner, and the annular plate body comprises a semicircular upper plate body and a semicircular plate body which are respectively arranged at corresponding positions of the upper shell and the lower shell; the opening edges of the upper shell and the lower shell are provided with connecting plates, and the two connecting plates are fixed by bolts after being in butt joint.
5. A fire retardant construction for an explosion proof enclosure according to claim 1, further comprising: the cylindrical shell comprises a first shell and a second shell which are fixedly butted in a cylindrical manner, and a first annular plate and a second annular plate are respectively arranged in the first shell and the second shell; the opening parts of the first shell and the second shell are connected through a buckle.
6. A fire retardant construction for an explosion proof enclosure according to claim 1, further comprising: the thermal expansion material is an expanded graphite layer, the expanded graphite layer is fixed by a thin film layer in the annular groove, the thickness of the expanded graphite layer is at least one tenth of the inner diameter of the cylindrical shell, the annular plate body and the inner wall of the cylindrical shell are integrally formed, the distance between the annular plate body and the cable joint is not more than 3CM, and a plurality of uniformly distributed overflow openings are radially formed in the annular plate body from the inner ring edge as a starting point.
7. A fire retardant construction for an explosion proof enclosure according to claim 1, further comprising: the sealing ring comprises a rubber ring, a ceramic heat insulation ring and a metal ring which are fixedly connected in sequence, and the outer ring size of the rubber ring is larger than that of the metal ring.
8. A fire retardant construction for an explosion proof enclosure according to claim 5, further comprising: a plurality of L-shaped grooves are formed in the inner wall of the opening of the first shell, and one ends of the L-shaped grooves are radially arranged from the inner wall of the opening of the first shell to the inside; a plurality of bulges corresponding to the L-shaped grooves are arranged on the outer wall of the opening of the second shell; the opening of the second housing is inserted into the opening of the second housing and is rotationally locked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204983.7A CN113889963A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant structure of explosion-proof box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111204983.7A CN113889963A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant structure of explosion-proof box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113889963A true CN113889963A (en) | 2022-01-04 |
Family
ID=79003048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111204983.7A Pending CN113889963A (en) | 2021-10-15 | 2021-10-15 | Flame-retardant structure of explosion-proof box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113889963A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115192940A (en) * | 2021-04-02 | 2022-10-18 | 中国石油化工股份有限公司 | Flame arrester with deformation unit component |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434320A (en) * | 1982-02-22 | 1984-02-28 | Eaton Corporation | Contractible conduit sealing connector |
| CN204578052U (en) * | 2015-04-03 | 2015-08-19 | 重庆大业电气有限责任公司 | Cable joint explosion-proof box |
| CN204578049U (en) * | 2015-04-03 | 2015-08-19 | 重庆大业电气有限责任公司 | The fire-retardant box of cable joint |
| CN205029296U (en) * | 2015-09-02 | 2016-02-10 | 重庆大业电气有限责任公司 | Double -deck explosion -proof box |
| CN105889562A (en) * | 2016-05-27 | 2016-08-24 | 王永球 | Piston type explosion-proof and water-proof ventilation valve |
| CN211183234U (en) * | 2019-12-31 | 2020-08-04 | 南京瑞铎电气有限公司 | Cable flame-retardant explosion-proof box capable of actively extinguishing fire |
| CN213519347U (en) * | 2020-12-28 | 2021-06-22 | 广东五羊实业发展有限公司 | High fire-resistant high flame retardant electric wire and cable |
| CN113161975A (en) * | 2021-05-08 | 2021-07-23 | 河南四达电力设备股份有限公司 | Flexible fireproof and explosion-proof blanket for cable intermediate joint |
-
2021
- 2021-10-15 CN CN202111204983.7A patent/CN113889963A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4434320A (en) * | 1982-02-22 | 1984-02-28 | Eaton Corporation | Contractible conduit sealing connector |
| CN204578052U (en) * | 2015-04-03 | 2015-08-19 | 重庆大业电气有限责任公司 | Cable joint explosion-proof box |
| CN204578049U (en) * | 2015-04-03 | 2015-08-19 | 重庆大业电气有限责任公司 | The fire-retardant box of cable joint |
| CN205029296U (en) * | 2015-09-02 | 2016-02-10 | 重庆大业电气有限责任公司 | Double -deck explosion -proof box |
| CN105889562A (en) * | 2016-05-27 | 2016-08-24 | 王永球 | Piston type explosion-proof and water-proof ventilation valve |
| CN211183234U (en) * | 2019-12-31 | 2020-08-04 | 南京瑞铎电气有限公司 | Cable flame-retardant explosion-proof box capable of actively extinguishing fire |
| CN213519347U (en) * | 2020-12-28 | 2021-06-22 | 广东五羊实业发展有限公司 | High fire-resistant high flame retardant electric wire and cable |
| CN113161975A (en) * | 2021-05-08 | 2021-07-23 | 河南四达电力设备股份有限公司 | Flexible fireproof and explosion-proof blanket for cable intermediate joint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115192940A (en) * | 2021-04-02 | 2022-10-18 | 中国石油化工股份有限公司 | Flame arrester with deformation unit component |
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