CN111130033B - Fire-resistant cable bridge - Google Patents

Fire-resistant cable bridge Download PDF

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Publication number
CN111130033B
CN111130033B CN201911369984.XA CN201911369984A CN111130033B CN 111130033 B CN111130033 B CN 111130033B CN 201911369984 A CN201911369984 A CN 201911369984A CN 111130033 B CN111130033 B CN 111130033B
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China
Prior art keywords
fire
push rod
bridge
main body
fixed
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Active
Application number
CN201911369984.XA
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Chinese (zh)
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CN111130033A (en
Inventor
朱春雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Huarui Bridge Co ltd
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Anhui Huarui Bridge Co ltd
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Priority to CN201911369984.XA priority Critical patent/CN111130033B/en
Publication of CN111130033A publication Critical patent/CN111130033A/en
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Publication of CN111130033B publication Critical patent/CN111130033B/en
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    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • H02G3/0412—Heat or fire protective means
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/03—Cooling
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • H02G3/0418—Covers or lids; Their fastenings
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0437—Channels
    • 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
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0456—Ladders or other supports

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Special Wing (AREA)

Abstract

The invention discloses a fire-resistant cable bridge, which comprises a bridge main body, wherein a plurality of heat dissipation holes are formed in the side wall of the bridge main body, a fire-resistant layer is fixedly attached to the inner wall of the bridge main body and used for fire resistance and heat insulation, a fire-resistant sliding plate is arranged, the bottom end of the fire-resistant sliding plate is clamped in a sliding groove, a fire-resistant mechanism is arranged, the fire-resistant mechanism comprises a fixed wheel, a temperature-sensing cavity and a push rod, the temperature-sensing cavity is fixed on the bottom wall of the outer side of the bridge main body, a temperature-sensing expansion piece is arranged in the temperature-sensing cavity, the push rod can be pushed through the thermal expansion of the temperature-sensing expansion piece, so that the side face of a cone of the push rod head can push the fixed wheel to drive the fire-resistant sliding plate to slide to seal the heat dissipation holes, and accordingly, when a fire occurs, therefore, the cable bridge has the ventilation, heat dissipation and fire resistance performances, and can be automatically reset so as not to influence repeated use.

Description

Fire-resistant cable bridge
Technical Field
The invention relates to the field of bridge equipment, in particular to a fire-resistant cable bridge.
Background
The cable bridge is a device for fixing cables, can be independently erected, can also be attached to various buildings and pipe gallery supports, and has the characteristics of simple structure, attractive appearance, flexible configuration, convenient maintenance and the like, the cable bridge can adopt a closed or semi-closed structure, because the cables can generate heat during the operation and use process, the closed design is not favorable for ventilation and heat dissipation, but when encountering fire, the cable bridge of the semi-closed structure can not play a good role of fire prevention and heat insulation, the cables are easy to cause fire and spread, the safety of power transmission is seriously influenced, aiming at the situation, the existing cable bridge can pass through internal spraying of the fireproof coating, the fireproof coating layer expands when encountering fire and blocks the heat dissipation holes so as to realize the fire prevention and heat insulation, but the fireproof coating is generally thinner, the fire resistance is limited, and the fireproof coating layer after expansion and foaming blocks the heat dissipation holes and is difficult to recover, there is a problem in repeated use.
Disclosure of Invention
In view of the above, the present invention is directed to a fire-resistant cable tray, so as to achieve the ventilation, heat dissipation and fire resistance of the cable tray, and the cable tray can be automatically reset so as not to affect the repeated use.
Based on the above purpose, the invention designs a fire-resistant cable bridge, which comprises:
the side wall of the bridge frame body is provided with a plurality of heat dissipation holes;
the cover plate is used for covering and sealing the upper end of the bridge frame main body;
the fireproof layer is fixedly attached to the inner wall of the bridge frame main body and used for fire resistance and heat insulation, and a first through hole is correspondingly formed in the radiating hole of the fireproof layer;
the sliding chute is fixed at the bottom end of the outer side wall of the bridge frame main body;
the bottom end of the fireproof sliding plate is clamped in the sliding groove and can slide along the sliding groove, and a second through hole is correspondingly formed in the heat dissipation hole of the fireproof sliding plate;
the baffle is fixed on the outer side wall of one end of the bridge frame main body;
the return spring is connected between the baffle and the fireproof sliding plate;
a firestop mechanism comprising:
the fixed wheel is axially fixed with a wheel shaft which is fixed on the outer side wall of the fireproof sliding plate;
the temperature sensing cavity is fixed on the bottom wall of the outer side of the bridge frame main body, and a temperature sensing expansion piece is arranged in the temperature sensing cavity;
one end of the push rod is fixedly connected with the temperature sensing expansion piece, and the other end of the push rod penetrates through the temperature sensing cavity;
the push rod head is fixed at one end of the push rod penetrating out of the temperature sensing cavity and is designed into a cone;
through the thermal expansion piece thermal expansion, can promote the push rod to drive the outside motion of push rod head, so that the cone side of push rod head can promote the tight pulley, so that drive the fire prevention slide and slide, in order to seal the louvre, through reset spring, can make the fire prevention slide reset.
Preferably, louvre, first through-hole, second through-hole, spout, fire prevention slide, baffle, reset spring, tight pulley, shaft, push rod, putter head all locate the both sides of crane span structure main part relatively.
Preferably, the cross-section of the cover plate is "U" shaped.
Preferably, a fire-resistant layer is also attached and fixed on the inner wall of the cover plate.
Preferably, the outer walls of the bridge body and the cover plate are coated with fireproof coatings for flame retardance and heat insulation.
Preferably, the number of fire retarding mechanisms provided is no less than two.
Preferably, the fixed wheel can be designed as one of a circular wheel, an oval wheel, a triangular wheel and a square wheel.
Preferably, the bridge frame main body and the cover plate are made of one or more of stainless steel, aluminum alloy and glass fiber reinforced plastics.
Preferably, the thickness of the bridge main body and the cover plate is not less than 5 mm.
From the above, the fire-resistant cable bridge designed by the invention is provided with the bridge main body, the side wall of the bridge main body is provided with a plurality of heat dissipation holes for ventilation and heat dissipation, the upper end of the bridge main body is sealed and covered with the cover plate which can play a role of protection and can be conveniently detached for placing in a cable, the inner wall of the bridge main body is fixedly attached with the fire-resistant layer for fire resistance and heat insulation, the fire-resistant sliding plate is arranged, the bottom end of the fire-resistant sliding plate is clamped in the chute, the fire-resistant mechanism is arranged and comprises the fixed wheel, the temperature-sensing cavity and the push rod, the temperature-sensing cavity is fixed on the bottom wall outside the bridge main body, the temperature-sensing expansion piece is arranged in the temperature-sensing cavity and is used for expanding under heat to push the push rod, and as the cable bridge is generally erected at a high position, the temperature-sensing cavity is arranged, the push rod head design is the cone, be heated the inflation through temperature sensing inflation piece, can promote the push rod, in order to drive the outside motion of push rod head, because the cone side of push rod head can conflict the tight pulley, and the cross section diameter of the cone side of conflicting constantly increases, so that the cone side of push rod head can promote the tight pulley, in order to drive the fire prevention slide and slide, in order to seal the louvre, in order to realize meeting the conflagration, but the automatic sensing high temperature is in order to seal the cable testing bridge, and through the flame retardant coating in the crane span structure main part, be used for the back-fire relief, it is thermal-insulated, collapsible in order to drive the push rod to move inwards and reset when temperature sensing inflation piece sensing temperature descends, thereby can stimulate the fire prevention slide through reset spring elastic force, in order to make the fire prevention slide reset, thereby realize that the cable testing bridge has ventilation.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a side view of an embodiment of the present invention.
In the figure: 1 crane span structure main part, 2 louvres, 3 apron, 4 flame retardant coatings, 41 first through-holes, 5 spouts, 6 fire prevention slides, 61 second through-holes, 7 baffles, 8 reset spring, 9 back-fire relief mechanism, 91 fixed wheel, 911 shaft, 92 temperature sensing chamber, 921 temperature sensing inflation spare, 93 push rods, 931 push rod head.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
A fire-resistant cable bridge comprises a bridge main body 1, a plurality of heat dissipation holes 2 are arranged on the side wall of the bridge main body 1, a cover plate 3 is hermetically covered at the upper end of the bridge main body 1, a fire-resistant layer 4 is fixedly attached to the inner wall of the bridge main body 1 and used for fire resistance and heat insulation, a first through hole 41 is correspondingly arranged at the heat dissipation hole 2 of the fire-resistant layer 4, a chute 5 is fixed at the bottom end of the outer side wall of the bridge main body 1, a fire-resistant sliding plate 6 is arranged, the bottom end of the fire-resistant sliding plate 6 is clamped in the chute 5 and can slide along the chute 5, a second through hole 61 is correspondingly arranged at the heat dissipation hole 2 of the fire-resistant sliding plate 6, a baffle 7 is fixed on the outer side wall of one end of the bridge main body 1, a reset spring 8 is connected between the baffle 7 and the fire-resistant sliding plate 6, a fire-resistant mechanism 9 is, shaft 911 is fixed on the 6 lateral walls of fire prevention slide, temperature sensing cavity 92 is fixed on the diapire in the 1 outside of crane span structure main part, be equipped with temperature sensing inflation piece 921 in the temperature sensing cavity 92, push rod 93 one end and temperature sensing inflation piece 921 fixed connection, the other end runs through out temperature sensing cavity 92, the one end that push rod 93 runs through out temperature sensing cavity 92 is fixed with push rod 931, push rod 931 design is the cone, be heated the inflation through temperature sensing inflation piece 921, can promote push rod 93, in order to drive push rod 931 outward movement, so that push rod 931's cone side can promote fixed wheel 91, slide in order to drive fire prevention slide 6, in order to seal louvre 2, through reset spring 8, can make fire prevention slide 6 slide reset.
The invention has the advantages that the bridge frame main body 1 is arranged, the side wall of the bridge frame main body 1 is provided with a plurality of heat dissipation holes 2 for ventilation and heat dissipation, the upper end of the bridge frame main body 1 is sealed and covered with the cover plate 3, the protection effect can be achieved, and simultaneously, the cable can be conveniently disassembled and placed, the inner wall of the bridge frame main body 1 is fixedly attached with the fireproof layer 4 for fire resistance and heat insulation, the fireproof sliding plate 6 is arranged, the bottom end of the fireproof sliding plate 6 is clamped in the chute 5, the fireproof mechanism 9 is arranged, the fire resistance mechanism 9 comprises a fixed wheel 91, a temperature sensing cavity 92 and a push rod 93, the temperature sensing cavity 92 is fixed on the bottom wall of the outer side of the bridge frame main body 1, the temperature sensing expansion piece 921 is arranged in the temperature sensing cavity 92 and is used for expanding by heating to push the push rod 93, and because the cable bridge frame is generally erected at a high position, the temperature, the pushing rod head 931 is designed as a cone, and the pushing rod 93 can be pushed by the thermal expansion of the temperature-sensitive expansion element 921 to drive the pushing rod head 931 to move outwards, since the side of the cone of the putter head 931 may abut the fixed pulley 91, and the cross-sectional diameter of the side of the cone that abuts the side of the cone is continuously increased, so that the side surface of the cone of the pushing rod head 931 can push the fixed wheel 91 to drive the fireproof sliding plate 6 to slide to seal the heat dissipation hole 2, thereby realizing that the high temperature can be automatically sensed to seal the cable bridge frame when encountering fire, and the fire-resistant layer 4 in the bridge frame main body 1 is passed through, used for fire resistance and heat insulation, the temperature sensing expansion piece 921 can contract when sensing temperature reduction to drive the push rod 93 to move inwards for resetting, thereby the fireproof sliding plate 6 can be pulled by the elastic force action of the return spring 8 to ensure that the fireproof sliding plate 6 slides and returns, therefore, the cable bridge has the ventilation, heat dissipation and fire resistance performances, and can be automatically reset so as not to influence repeated use.
In the embodiment of the invention, the heat dissipation holes 2, the first through hole 41, the second through hole 61, the sliding groove 5, the fireproof sliding plate 6, the baffle 7, the return spring 8, the fixed wheel 91, the wheel shaft 911, the push rod 93 and the push rod head 931 are oppositely arranged on two sides of the bridge frame main body 1, so that both sides of the bridge frame main body 1 can be ventilated and cooled, and the heat dissipation holes 2 on two sides of the bridge frame main body 1 can be sealed through the thermal expansion piece 921 in the thermal sensing cavity 92 to expand by heating, so as to prevent fire and insulate heat, and the automatic return can be realized through the return springs 8 on two sides.
In the embodiment of the present invention, the cross section of the cover plate 3 is "U" shaped to facilitate the snap-fit covering of the upper end of the bridge main body 1.
In the embodiment of the invention, the inner wall of the cover plate 3 is also fixedly attached with the fire-resistant layer 4, so that better fire resistance and heat insulation at the upper end of the bridge frame main body 1 are facilitated.
In the embodiment of the invention, the outer walls of the bridge frame body 1 and the cover plate 3 are coated with fireproof coatings to play roles of flame retardance and heat insulation.
In the embodiment of the invention, the number of the fire retardant mechanisms 9 is not less than two, so that the temperatures of different positions can be sensed through the temperature sensing cavities 92, as long as one of the temperature sensing cavities 92 expands when heated, the push rod 93 can be pushed to seal the whole cable bridge to retard fire and insulate heat, and only when all the temperature sensing cavities 92 sense the temperature drop and contract to drive the push rod 93 to move inwards to reset, the reset spring 8 can drive the fireproof sliding plate 6 to reset, so that the cable bridge has a better fireproof effect.
In the embodiment of the present invention, the fixed wheel 91 may be designed as one of a circular wheel, an oval wheel, a triangular wheel, and a square wheel to facilitate flexibility of design.
In the embodiment of the present invention, the bridge body 1 and the cover plate 3 may be made of one or more of stainless steel, aluminum alloy, and glass fiber reinforced plastic.
In the embodiment of the invention, the thickness of the bridge frame main body 1 and the cover plate 3 is not less than 5mm, so that better fire resistance and flame retardance are facilitated.
In the fire-resistant cable bridge disclosed by the invention, the bridge main body 1 is arranged, a plurality of heat dissipation holes 2 are arranged on the side wall of the bridge main body 1, the inner wall of the bridge main body 1 is fixedly attached with a fire-resistant layer 4 for fire resistance and heat insulation, a temperature sensing cavity 92 is fixed on the bottom wall of the outer side of the bridge main body 1, a temperature sensing expansion piece 921 is arranged in the temperature sensing cavity 92, and the push rod 93 can be pushed to drive the push rod head 931 to move outwards through the thermal expansion piece 921 to enable the side surface of the cone of the push rod head 931 to push the fixed wheel 91 to drive the fire-resistant sliding plate 6 to slide so as to seal the heat dissipation holes 2 through thermal expansion, so that when a fire occurs, the high temperature can be automatically sensed to seal the cable bridge, and when the temperature is sensed to fall through the fire-resistant layer 4 in the bridge main body 1 for fire resistance and heat insulation, the temperature sensing expansion piece 921 can be contracted to drive the, so that the fireproof sliding plate 6 is reset in a sliding manner, the cable bridge has ventilation, heat dissipation and fire resistance, and can be automatically reset so as not to affect repeated use, wherein the heat dissipation holes 2, the first through holes 41, the second through holes 61, the sliding chute 5, the fireproof sliding plate 6, the baffle 7, the reset spring 8, the fixed wheel 91, the wheel shaft 911, the push rod 93 and the push rod head 931 are oppositely arranged at two sides of the bridge main body 1, the cross section of the cover plate 3 is U-shaped so as to be beneficial to clamping and covering the upper end of the bridge main body 1, the inner wall of the cover plate 3 is also fixedly provided with a fireproof layer 4 in a fitting manner so as to be beneficial to better fire resistance and heat insulation at the upper end of the bridge main body 1, the outer walls of the bridge main body 1 and the cover plate 3 are coated with fireproof coatings so as to play a role in fire resistance and heat insulation, the number of the fireproof mechanisms 9 is not less than two, the fixed, the bridge main body 1 and the cover plate 3 can be made of one or more of stainless steel, aluminum alloy and glass fiber reinforced plastic, and the thickness of the bridge main body 1 and the thickness of the cover plate 3 are not less than 5mm, so that better fire resistance and flame retardance are facilitated.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also technical features in the above embodiments or in different embodiments may be combined and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (9)

1. A fire-resistant cable bridge, comprising:
the side wall of the bridge body is provided with a plurality of heat dissipation holes;
the cover plate is used for covering and closing the top end of the bridge frame main body;
the fireproof layer is fixedly attached to the inner wall of the bridge main body and used for fire resistance and heat insulation, and a first through hole is correspondingly formed in the radiating hole of the fireproof layer;
the sliding groove is fixed at the bottom end of the outer side wall of the bridge main body;
the bottom end of the fireproof sliding plate is clamped in the sliding groove and can slide along the sliding groove, and a second through hole is correspondingly formed in the position, where the heat dissipation hole is formed, of the fireproof sliding plate;
the baffle is fixed on the outer side wall of one end of the bridge frame main body;
the return spring is connected between the baffle and the fireproof sliding plate;
a firestop mechanism comprising:
the fixed wheel is axially fixed with a wheel shaft, and the wheel shaft is fixed on the outer side wall of the fireproof sliding plate;
the temperature sensing cavity is fixed on the bottom wall of the outer side of the bridge frame main body, and a temperature sensing expansion piece is arranged in the temperature sensing cavity;
one end of the push rod is fixedly connected with the temperature sensing expansion piece, and the other end of the push rod penetrates out of the temperature sensing cavity;
the push rod head is fixed at one end of the push rod penetrating through the temperature sensing cavity and is designed into a cone;
through temperature sensing inflation piece is heated the inflation, can promote the push rod, in order to drive the outside motion of push rod head, so that the cone side of push rod head can promote the tight pulley, in order to drive the fire prevention slide slides, in order to seal the louvre, through reset spring can make the fire prevention slide slides and resets.
2. The fire-resistant cable tray according to claim 1, wherein the heat dissipation holes, the first through holes, the second through holes, the sliding grooves, the fire-resistant sliding plates, the baffles, the return springs, the fixed wheels, the wheel shafts, the push rods, and the push rod heads are disposed on two sides of the tray body.
3. The flame-resistant cable tray of claim 1, wherein the cover plate is "U" shaped in cross-section.
4. The flame-retardant cable bridge stand of claim 1, wherein the flame-retardant layer is also fixedly attached to the inner wall of the cover plate.
5. The fire-resistant cable tray of claim 1, wherein the outer walls of the tray body and the cover plate are coated with a fire-resistant coating for fire-resistance and thermal insulation.
6. The fire resistant cable tray of claim 1, wherein the number of fire retardant mechanisms provided is no less than two.
7. The flame-resistant cable tray of claim 1, wherein the fixed wheel is configured as one of a round wheel, an oval wheel, a triangular wheel, and a square wheel.
8. The fire-resistant cable tray of claim 1, wherein the tray body and the cover plate are made of one or more of stainless steel, aluminum alloy and glass fiber reinforced plastic.
9. The flame-resistant cable tray of claim 1, wherein the thickness of each of the tray body and the cover is not less than 5 mm.
CN201911369984.XA 2019-12-26 2019-12-26 Fire-resistant cable bridge Active CN111130033B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911369984.XA CN111130033B (en) 2019-12-26 2019-12-26 Fire-resistant cable bridge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911369984.XA CN111130033B (en) 2019-12-26 2019-12-26 Fire-resistant cable bridge

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Publication Number Publication Date
CN111130033A CN111130033A (en) 2020-05-08
CN111130033B true CN111130033B (en) 2020-11-27

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112490964A (en) * 2020-11-10 2021-03-12 安徽富悦达电子有限公司 Fire prevention nonmetal cable testing bridge
CN112688251B (en) * 2021-01-21 2022-05-13 浙江桥母电气有限公司 Composite fire-resistant corrosion-resistant cable bridge
CN113241691B (en) * 2021-06-01 2022-05-24 南京讴歌机械制造有限公司 Cable support
CN113572102B (en) * 2021-09-28 2021-11-30 江苏翌强能源设备有限公司 Self-falling plate heat insulation type cable bridge
CN114597831B (en) * 2022-03-09 2024-04-16 烟台金润核电材料股份有限公司 Cable heat dissipation type protection structure
CN116247581B (en) * 2022-12-15 2024-05-07 安徽瑞科电气有限公司 Breathable fire-resistant cable bridge

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FR2684306A1 (en) * 1991-11-28 1993-06-04 Electricite De France FIRE-RESISTANT VENTILATION DEVICE WITH STATIC ELEMENTS.
DE19653963C2 (en) * 1996-10-28 1999-09-23 Reinhold Drosselmeyer Fire protection cable housing
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