A fireproof cable tray

Abstract

This application provides a fireproof cable tray, belonging to the field of cable tray technology. It includes a frame and a cover plate, and further includes several strip-shaped shells, each containing a closing plate and a heat-sensitive glass body. The bottom of each strip-shaped shell has a discharge port corresponding to one of the closing plates, and one side of the closing plate is hinged to the strip-shaped shell. A vent is located opposite the hinged side of the closing plate on each strip-shaped shell, and a sealing plate is inserted into the vent. Several heat-sensitive glass bodies correspond to the closing plates and are connected to the bottom of the strip-shaped shells via support frames. Both ends of the heat-sensitive glass bodies abut against the closing plates and the support frames, respectively. The outer side of the sealing plate is connected to the corresponding closing plate via a fireproof rope. After the heat-sensitive glass body breaks, the closing plate rotates around the hinge axis to open the discharge port and vent, allowing the extinguishing agent inside the strip-shaped shell to fall. Through the above-mentioned design, the extinguishing agent can fall downwards from the discharge port, covering the fire area and providing timely fire suppression.

Description

Technical Field

[0001] This application belongs to the field of cable tray technology, specifically relating to a fireproof cable tray. Background Technology

[0002] Cable trays are devices used to carry and protect cables, and are generally classified into trough type, tray type, and ladder type. In the existing technology, cable trays usually hold multiple cables, and the distance between adjacent cables is relatively close. When a cable fire occurs, it is impossible to extinguish the fire in time. Summary of the Invention

[0003] This application provides a fireproof cable tray, which aims to solve the problem that existing cable trays cannot extinguish fires in a timely manner when cables catch fire.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] A fire-resistant cable tray is provided, comprising a frame and a cover plate. The fire-resistant cable tray further includes several strip-shaped housings connected to the cover plate and corresponding one-to-one with the cables. Each strip-shaped housing includes:

[0006] Several opening and closing plates are spaced apart at the bottom of the strip shell along its length; the bottom of the strip shell has a discharge port corresponding to each opening and closing plate, and one side of the opening and closing plate is hinged to the strip shell; the strip shell has a vent at the position opposite to the hinged side of the opening and closing plate, and a sealing plate is inserted into the vent.

[0007] Several thermosensitive glass bodies correspond one-to-one with the opening and closing plate and are connected to the bottom of the strip-shaped shell through a support frame. The two ends of the thermosensitive glass bodies abut against the opening and closing plate and the support frame, respectively.

[0008] The outer side of the sealing plate is connected to the corresponding opening and closing plate by a fireproof rope; after the heat-sensitive glass body breaks, the opening and closing plate rotates around the hinge axis to open the discharge port and the vent, allowing the extinguishing agent inside the strip shell to fall out.

[0009] In one possible implementation, the vent is located on the side of the strip housing near the top, and the strip housing has a guide plate at the bottom of the vent. The fireproof rope passes around the outside of the guide plate and is connected to the opening and closing plate below.

[0010] When the opening and closing plate rotates around the hinge axis, the fireproof rope provides outward tension to the sealing plate under the steering action of the guide plate.

[0011] In one possible implementation, the bottom of the opening and closing plate has a connecting rod, and the other end of the fireproof rope is tied to the connecting rod; or, the bottom of the opening and closing plate has a threaded hole, and the other end of the fireproof rope is tied to a bolt, the bolt being threadedly engaged with the threaded hole on the opening and closing plate.

[0012] In one possible implementation, the strip-shaped housing has an insertion hole on the outside of the vent, the size of which is larger than the size of the vent, and a sealing plate is inserted into the insertion hole; wherein the depth of the insertion hole is one-quarter of the depth of the vent, and the thickness of the sealing plate is the same as the depth of the insertion hole.

[0013] In one possible implementation, the support frame includes:

[0014] A sleeve is located directly below the opening and closing plate; connecting rods are connected to both sides of the sleeve, and the other ends of the two connecting rods are respectively connected to the opposite side walls of the strip-shaped housing; the inner diameter of the sleeve is larger than the maximum diameter of the thermosensitive glass body so that the thermosensitive glass body can pass through the sleeve.

[0015] An insert is connected to the opening and closing plate; the opening of the insert faces downward, and the insert is inserted into the top of the thermosensitive glass body.

[0016] A clamping cylinder is inserted into the bottom of the thermosensitive glass; the outer peripheral wall of the clamping cylinder has external threads, and the inner peripheral wall of the sleeve has internal threads.

[0017] Specifically, the thermosensitive glass body is pressed against the position between the insert and the clamping cylinder by the threaded engagement of the clamping cylinder and the sleeve; the distance between the sleeve and the opening and closing plate is greater than the radius of rotation of the opening and closing plate around the hinge axis.

[0018] In one possible implementation, the top of the strip-shaped shell is a feed inlet, which is closed by a top plate;

[0019] The top plate has a plug-in component at its bottom, the outer peripheral wall of which contacts the inner peripheral wall of the strip-shaped housing; the outer peripheral wall of the plug-in component has several threaded holes, and the strip-shaped housing has through holes aligned with the threaded holes on the plug-in component; the strip-shaped housing and the plug-in component are connected by bolts.

[0020] In one possible implementation, the cover plate is provided with L-shaped baffles on both sides of the top plate, and slots are formed between the L-shaped baffles and the cover plate, with the two sides of the top plate respectively engaging with the two slots.

[0021] The L-shaped baffle has several threaded holes at its bottom, and the top plate has through holes aligned with the threaded holes of the L-shaped baffle. After the top plate is installed in place, it is fixed to the L-shaped baffle with bolts.

[0022] In one possible implementation, the frame has a receiving cavity for placing cables, and the bottom of the receiving cavity has several partitions to separate adjacent cables; the partitions are conical in shape, with the top of the partition being a small end and the bottom being a large end.

[0023] When the extinguishing agent falls into the accommodating cavity from the strip-shaped shell, the partition allows the extinguishing agent to accumulate at the location of the burning cable.

[0024] In one possible implementation, the discharge port is a stepped hole, and the opening and closing plate abuts against the bottom wall of the stepped hole.

[0025] In one possible implementation, the hinge side of the opening and closing plate has a through hole, and the strip housing also has a through hole at the hinge position of the opening and closing plate; after the hinge side of the opening and closing plate is placed into the corresponding position of the stepped hole, a hinge shaft is inserted from the outside of the strip housing, and the hinge shaft is engaged with the through hole of the opening and closing plate.

[0026] This application provides a fireproof cable tray, which, compared with the prior art, features strip-shaped shells on the cover plate corresponding to each cable. After a fire occurs, the temperature inside the cable tray rises. When the temperature reaches the limit of the heat-sensitive glass, the glass shatters. At this point, the opening and closing plate loses its supporting function and swings outward under its own weight and the pressure of the extinguishing agent inside the strip-shaped shell. The extinguishing agent can then fall from the discharge port, covering the fire area and providing timely fire suppression. During the outward swinging process, the opening and closing plate provides tension to the sealing plate via fire-resistant ropes. Under the tension of the fire-resistant ropes, the sealing plate detaches from the strip-shaped shell, opening the vent and balancing the air pressure inside and outside the strip-shaped shell, allowing the extinguishing agent to fall more smoothly from the discharge port. Attached Figure Description

[0027] Figure 1 A schematic diagram of a fireproof cable tray provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 Enlarged diagram of section A in the middle;

[0029] Figure 3 for Figure 2 Enlarged diagram of section B;

[0030] Figure 4 A cross-sectional view of a strip-shaped housing for a fireproof cable tray provided in an embodiment of this application;

[0031] Figure 5 A schematic diagram of the discharge port portion of a fireproof cable tray provided in an embodiment of this application;

[0032] Figure 6 for Figure 5 Enlarged diagram of section C;

[0033] Figure 7 A schematic diagram of the vent portion of a fireproof cable tray provided in an embodiment of this application;

[0034] Figure 8 A side view of a fireproof cable tray provided in an embodiment of this application;

[0035] Figure 9 A schematic diagram of the cover plate portion of a fireproof cable tray provided in an embodiment of this application;

[0036] Figure 10 for Figure 9 Enlarged schematic diagram of section D in the middle;

[0037] Figure 11 This is a schematic diagram of the top plate portion of a fireproof cable tray provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Receiving cavity; 12. Partition; 2. Cover plate; 21. L-shaped baffle; 3. Strip-shaped shell; 31. Discharge port; 32. Vent; 321. Insertion hole; 33. Sealing plate; 34. Support frame; 341. Sleeve; 342. Insertion cylinder; 343. Clamping cylinder; 344. Connecting rod; 345. Cross-shaped groove; 35. Fireproof rope; 36. Guide plate; 37. Roller; 38. Feed port; 4. Opening and closing plate; 41. Connecting rod; 5. Thermosensitive glass body; 6. Top plate; 61. Insertion component. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] Please refer to the following: Figures 1 to 11This application describes a fireproof cable tray. The fireproof cable tray includes a frame 1 and a cover plate 2. The fireproof cable tray also includes several strip-shaped housings 3 connected to the cover plate 2 and corresponding to the cables. Each strip-shaped housing 3 includes several opening and closing plates 4 and several heat-sensitive glass bodies 5. The opening and closing plates 4 are spaced apart along the length of the strip-shaped housing 3 at its bottom. The bottom of the strip-shaped housing 3 has a discharge port 31 corresponding to each opening and closing plate 4. One side of each opening and closing plate 4 is hinged to the strip-shaped housing 3. The hinged side of the strip-shaped housing 3 and the opening and closing plate 4 are... The corresponding position has a vent 32, and a sealing plate 33 is inserted into the vent 32; several heat-sensitive glass bodies 5 correspond one-to-one with the opening and closing plates 4, and are connected to the bottom of the strip shell 3 through a support frame 34. The two ends of the heat-sensitive glass bodies 5 abut against the opening and closing plates 4 and the support frame 34 respectively; wherein, the outer side of the sealing plate 33 is connected to the corresponding opening and closing plate 4 through a fireproof rope 35; after the heat-sensitive glass body 5 is broken, the opening and closing plate 4 rotates around the hinge axis to open the discharge port 31 and the vent 32, so that the extinguishing agent in the strip shell 3 falls out.

[0041] This application provides a fireproof cable tray. Compared with the prior art, by setting strip-shaped shells 3 on the cover plate 2 that correspond one-to-one with the cables, after a fire occurs in the cables, the temperature inside the cable tray rises. When the temperature reaches the limit temperature that the heat-sensitive glass body 5 can withstand, the heat-sensitive glass body 5 will shatter. At this time, the opening and closing plate 4 loses its supporting function. Under the action of its own weight and the pressure of the extinguishing agent inside the strip-shaped shell 3, the opening and closing plate 4 swings outward. The extinguishing agent can fall down from the discharge port 31 to cover the fire area and play a role in timely fire extinguishing. During the outward swinging process, the opening and closing plate 4 provides tension to the sealing plate 33 through the fireproof rope 35. At this time, the sealing plate 33 detaches from the strip-shaped shell 3 under the tension of the fireproof rope 35, opens the vent 32, balances the air pressure inside and outside the strip-shaped shell 3, and allows the extinguishing agent to fall more smoothly from the discharge port 31. In the event of a fire, one or more heat-sensitive glass bodies 5 located in the fire area shatter, causing the opening and closing plate 4 to swing downwards and open the discharge port 31. The extinguishing agent inside the strip-shaped housing 3 can then fall from the discharge port 31 in the fire area, covering the fire area and extinguishing the fire. It should be noted that the extinguishing agent above the opening and closing plate position within the strip-shaped housing 3, which is in a closed state, will also flow towards the discharge port 31 in the fire area as the extinguishing agent falls, i.e., it flows laterally within the strip-shaped housing 3. This allows most of the extinguishing agent inside the strip-shaped housing 3 to fall from the discharge port 31 in the fire area, facilitating the coverage of the fire area.

[0042] The thermosensitive glass body 5 includes a glass shell and a heat-sensitive liquid filled inside the glass shell. The heat-sensitive liquid is an expanding liquid, such as kerosene, ether, alcohol, acetone, glycerin and other organic solutions. These liquids have a high coefficient of thermal expansion and are sensitive to temperature changes. In order to improve the performance of the heat-sensitive liquid, some additives can be added, such as tetrachloroethylene, ketone carboxylic acid esters and simple low ketones. In this application, the maximum temperature that the thermosensitive glass body can withstand is 68°C or 79°C.

[0043] Working principle of the thermal glass body 5: Under normal circumstances, the thermal glass body 5 is located between the opening and closing plate 4 and the support frame 34, and supports the opening and closing plate 4; the heat-sensitive liquid inside the thermal glass body 5 is in an unexpanded state, and the glass shell of the thermal glass body 5 can withstand a certain supporting force to ensure that the opening and closing plate 4 is in a closed state; when a fire occurs, the temperature of the cable tray rises, and the heat-sensitive liquid inside the corresponding thermal glass body 5 expands rapidly with the temperature rise, and the volume gradually increases; when the ultimate pressure that the glass shell can withstand is reached, the thermal glass body 5 breaks, at which point the opening and closing plate 4 loses its support, and the opening and closing plate 4 can swing downward around the hinge axis to open the discharge port 31.

[0044] The extinguishing agent inside the strip-shaped shell 3 can be either dry powder or dry sand. When the extinguishing agent inside the strip-shaped shell 3 is dry powder, it needs to be replaced regularly.

[0045] The fire-resistant rope 35 can be made of aramid fiber. The purpose of connecting the sealing plate 33 and the opening / closing plate 4 with the fire-resistant rope 35 is to reduce the possibility of the fire-resistant rope 35 burning out. If the fire-resistant rope 35 burns out, the opening / closing plate 4 will swing downwards and will not be able to pull off the sealing plate 33, making the extinguishing agent's fall from the discharge port 31 less smooth. It should be noted that even when the sealing plate 33 is not open, the extinguishing agent inside the strip-shaped housing 3 will still fall downwards.

[0046] In some embodiments, such as Figures 1 to 11 As shown, the frame 1 has a receiving cavity 11 for placing cables. The bottom of the receiving cavity 11 has several partitions 12 to separate adjacent cables. The partitions 12 have a conical structure, with the top of the partition 12 being the small end and the bottom being the large end. When the extinguishing agent in the strip shell 3 falls into the receiving cavity 11, the partitions 12 can cause the extinguishing agent to accumulate at the location of the burning cable.

[0047] It should be noted that separating adjacent cables by partition 12 reduces contact between them, thereby reducing the rapid spread of fire between different cables and helping to control the fire's range. In the event of a fire, the extinguishing agent inside the strip-shaped housing 3 falls onto the area where the cable is on fire to extinguish the fire. When the extinguishing agent falls onto partition 12, it can slide along the slope of partition 12 and eventually accumulate around the cable, thus covering the area where the cable is on fire. By setting partition 12 into a conical structure, it can guide the extinguishing agent and improve its extinguishing effect.

[0048] In some embodiments, such as Figures 1 to 11 As shown, the vent 32 is located on the side of the strip-shaped housing 3 near the top. A guide plate 36 is located on the outer side of the strip-shaped housing 3 at the bottom of the vent 32. A fireproof rope 35 passes over the outer side of the guide plate 36 and connects to the lower opening / closing plate 4. When the opening / closing plate 4 rotates around its hinge axis, the fireproof rope 35, under the steering action of the guide plate 36, provides an outward pulling force to the sealing plate 33. The upper surface of the guide plate 36 is coplanar with the lower surface of the sealing plate 33. The fireproof rope 35 is perpendicular to the sealing plate 33. When the fireproof rope 35 provides a horizontal pulling force to the sealing plate 33, it can pull the sealing plate 33 away from the vent 32.

[0049] It should be noted that by setting the vent 32 near the top of the strip shell 3, during the process of the extinguishing agent in the strip shell 3 being discharged from the discharge port 31, external air can enter the interior of the strip shell 3 through the vent 32, balance the air pressure inside and outside the strip shell 3, and ensure that the extinguishing agent in the strip shell 3 can be smoothly discharged from the discharge port 31.

[0050] By setting a guide plate 36 on the strip shell 3, the direction of the tension of the fireproof rope 35 on the sealing plate 33 can be reversed; when the opening and closing plate 4 swings downward, the tension of the fireproof rope 35 on the sealing plate 33 is in an outward pulling state, thereby pulling the sealing plate 33 out from the vent 32 position.

[0051] For example, a roller 37 is rotatably provided on the outer side of the guide plate 36, and the top of the roller 37 is at the same height as the top of the guide plate 36. The fireproof rope 35 is rotatably engaged with the roller 37. When the fireproof rope 35 pulls the sealing plate 33 outward, there is rolling friction between the fireproof rope 35 and the roller 37, which can reduce the frictional resistance between the fireproof rope 35 and the guide plate 36. There are two guide plates 36, which are respectively provided at both ends of the roller 37. Each of the two guide plates 36 has a through hole for the rotating shaft of the roller 37 to pass through. The diameter of the rotating shaft of the roller 37 is smaller than the diameter of the roller 37, so the roller 37 can be confined between the two guide plates 36.

[0052] For example, in the initial state, the fireproof rope 35 does not provide tension to the sealing plate 33; after the opening and closing plate 4 swings downward, the fireproof rope 35 is tightened and provides tension to the sealing plate 33, pulling the sealing plate 33 away from the vent 32.

[0053] In some embodiments, such as Figures 1 to 11 As shown, the bottom of the opening and closing plate 4 has a connecting rod 41, and the other end of the fireproof rope 35 is tied to the connecting rod 41; or, the bottom of the opening and closing plate 4 has a threaded hole, and the other end of the fireproof rope 35 is tied to a bolt, with the bolt threaded into the threaded hole on the opening and closing plate 4.

[0054] When the connecting rod 41 is fixedly installed at the bottom of the opening and closing plate 4, the other end of the fireproof rope 35 can be directly tied to the connecting rod 41; when the opening and closing plate 4 closes the discharge port 31, the fireproof rope 35 does not provide tension to the sealing plate 33; when the opening and closing plate 4 rotates downward, the fireproof rope 35 provides tension to the sealing plate 33 so that the sealing plate 33 is removed from the vent 32.

[0055] When the bottom of the opening and closing plate 4 is provided with a threaded hole, the other end of the fireproof rope 35 can be tied to the bolt. Through the threaded engagement between the bolt and the opening and closing plate 4, the other end of the fireproof rope 35 can be connected to the opening and closing plate 4. When the opening and closing plate 4 swings downward, the fireproof rope 35 can pull the sealing plate 33 away from the vent 32.

[0056] In some embodiments, such as Figures 1 to 11 As shown, the strip-shaped housing 3 has an insertion hole 321 on the outside of the vent 32. The size of the insertion hole 321 is larger than the size of the vent 32. The sealing plate 33 is inserted into the insertion hole 321. The depth of the insertion hole 321 is one-quarter of the depth of the vent 32. The thickness of the sealing plate 33 is the same as the depth of the insertion hole 321.

[0057] It should be noted that the thickness of the sealing plate 33 is the same as the depth of the insertion hole 321. Therefore, the thickness of the sealing plate 33 is equivalent to one-fifth of the thickness of the side wall of the strip shell 3. With the above arrangement, the insertion depth of the sealing plate 33 is not deep. Therefore, after the fireproof rope 35 provides outward pulling force to the sealing plate 33, it is easy for the sealing plate 33 to separate from the insertion hole 321.

[0058] Since the size of the jack 321 is larger than the size of the vent 32, the sealing plate 33 can be confined within the jack 321, reducing the insertion depth of the sealing plate 33; and the sealing plate 33 can be easily pulled out when pulled outward.

[0059] In some embodiments, such as Figures 1 to 11As shown, the support frame 34 includes a sleeve 341, an insert 342, and a clamping cylinder 343; the sleeve 341 is located directly below the opening and closing plate 4; connecting rods 344 are connected to both sides of the sleeve 341, and the other ends of the two connecting rods 344 are respectively connected to the opposite side walls of the strip-shaped housing 3; the inner diameter of the sleeve 341 is larger than the maximum diameter of the thermosensitive glass body 5, so that the thermosensitive glass body 5 can pass through the sleeve 341; the insert 342 is connected to the opening and closing plate 4; the opening of the insert 342 faces downward, and the insert 342 and the thermosensitive glass body 5 are... The top is inserted into the sleeve; the bottom of the clamping cylinder 343 is inserted into the sleeve; the outer peripheral wall of the clamping cylinder 343 has external threads, and the inner peripheral wall of the sleeve 341 has internal threads; wherein, through the threaded engagement of the clamping cylinder 343 and the sleeve 341, the thermosensitive glass body 5 is pressed against the position between the insert cylinder 342 and the clamping cylinder 343; the distance between the sleeve 341 and the opening and closing plate 4 is greater than the radius of rotation of the opening and closing plate 4 around the hinge axis, so the sleeve 341 will not interfere with the opening and closing plate 4 during the swinging process.

[0060] It should be noted that when the opening and closing plate 4 is rotated to the horizontal position, the discharge port 31 at the bottom of the strip housing 33 of the opening and closing plate 4 is closed. At this time, the thermal glass body 5 can be passed through the sleeve 341 and the top of the thermal glass body 5 can be inserted into the insert 342 on the opening and closing plate 4. Through the threaded engagement between the clamping cylinder 343 and the sleeve 341, and the insertion engagement between the clamping cylinder 343 and the bottom of the thermal glass body 5, the thermal glass body 5 can be limited while gradually being installed into the position of clamping the opening and closing plate 4.

[0061] The bottom of the clamping cylinder 343 has a cross-shaped groove 345. The operator inserts the cross-shaped plate into the cross-shaped groove 345 and rotates the cross-shaped plate, which can drive the clamping cylinder 343 to rotate, thereby rotating the clamping cylinder 343 into position. At this time, the thermal glass body 5 is in the state of clamping the opening and closing plate 4.

[0062] In some embodiments, such as Figures 1 to 11 As shown, the top of the strip-shaped housing 3 is a feed inlet 38, which is closed by the top plate 6; the bottom of the top plate 6 has a plug-in component 61, the outer peripheral wall of the plug-in component 61 is in contact with the inner peripheral wall of the strip-shaped housing 3; the outer peripheral wall of the plug-in component 61 has several threaded holes, and the strip-shaped housing 3 has through holes aligned with the threaded holes on the plug-in component 61; the strip-shaped housing 3 and the plug-in component 61 are connected by bolts.

[0063] It should be noted that after the discharge port 31 at the bottom of the strip shell 3 is closed by the opening and closing plate 4, the extinguishing agent is poured into the strip shell 3 from the inlet 38 at the top of the strip shell 3. The height of the extinguishing agent is lower than the height of the vent 32. After the extinguishing agent is poured in, the plug-in component 61 is plugged into the inlet 38 and the plug-in component 61 and the strip shell 3 are fixed with bolts. After the top plate 6 is fixed on the strip shell 3, the top plate 6 is then fixed on the cover plate 2. The length of the strip shell 3 is the same as the length of the cover plate 2. The frame 1 is provided with multiple cover plates 2 to close the top of the frame 1.

[0064] In some embodiments, such as Figures 1 to 11 As shown, L-shaped baffles 21 are provided on both sides of the top plate 6 on the cover plate 2, and slots are formed between the L-shaped baffles 21 and the cover plate 2. The two sides of the top plate 6 are respectively inserted into the two slots. The bottom of the L-shaped baffles 21 has several threaded holes, and the top plate 6 has through holes aligned with the threaded holes of the L-shaped baffles 21. After the top plate 6 is installed in place, the top plate 6 is fixed to the L-shaped baffles 21 by bolts.

[0065] It should be noted that the top plate 6 is inserted into the slots on both sides, and the through hole on the top plate 6 is aligned with the threaded hole at the bottom of the L-shaped baffle 21. At this time, the top plate 6 can be fixed on the L-shaped baffle 21 by bolts, thus completing the operation of fixing the strip shell 3 on the cover plate 2.

[0066] In some embodiments, such as Figures 1 to 11 As shown, the discharge port 31 is a stepped hole, and the opening and closing plate 4 abuts against the bottom wall of the stepped hole; the hinge side of the opening and closing plate 4 has a through hole, and the strip housing 3 also has a through hole at the hinge position of the opening and closing plate 4; after the hinge side of the opening and closing plate 4 is placed into the corresponding position of the stepped hole, the hinge shaft is inserted from the outside of the strip housing 3, and the hinge shaft is engaged with the through hole of the opening and closing plate 4.

[0067] It should be noted that by setting the discharge port 31 as a stepped hole and placing the opening and closing plate 4 into the stepped hole, the opening and closing plate 4 can be limited, reducing the possibility of displacement. By setting through holes on the opening and closing plate 4 and the strip housing 3, after the opening and closing plate 4 is placed in place, the hinge shaft can be inserted into the through hole on the strip housing 3, allowing the hinge shaft to pass through the through hole on the opening and closing plate 4, thereby enabling the opening and closing plate 4 to rotate around the hinge shaft. After the extinguishing agent in the strip housing 3 is used, if the strip housing 3 is not burned, the strip housing 3 can be reused.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fireproof cable tray, comprising a frame and a cover plate, characterized in that, Fire-resistant cable trays also include several strip-shaped housings connected to the cover plate and corresponding to the cables one by one. Each strip-shaped housing includes: Several opening and closing plates are spaced apart at the bottom of the strip shell along its length; the bottom of the strip shell has a discharge port corresponding to each opening and closing plate, and one side of the opening and closing plate is hinged to the strip shell; the strip shell has a vent at the position opposite to the hinged side of the opening and closing plate, and a sealing plate is inserted into the vent. Several thermosensitive glass bodies correspond one-to-one with the opening and closing plate and are connected to the bottom of the strip-shaped shell through a support frame. The two ends of the thermosensitive glass bodies abut against the opening and closing plate and the support frame, respectively. The outer side of the sealing plate is connected to the corresponding opening and closing plate by a fireproof rope; after the heat-sensitive glass body breaks, the opening and closing plate rotates around the hinge axis to open the discharge port and the vent, allowing the extinguishing agent inside the strip shell to fall out. The frame has a cavity for placing cables, and the bottom of the cavity has several partitions to separate adjacent cables; the partitions are conical in shape, with the top of the partition being the smaller end and the bottom being the larger end. When the extinguishing agent falls into the accommodating cavity from the strip-shaped shell, the partition allows the extinguishing agent to accumulate at the location of the burning cable.

2. A fireproof cable tray as described in claim 1, characterized in that, The vent is located on the side of the strip housing near the top. The strip housing has a guide plate at the bottom of the vent. The fireproof rope passes around the outside of the guide plate and connects to the opening and closing plate below. When the opening and closing plate rotates around the hinge axis, the fireproof rope provides outward tension to the sealing plate under the steering action of the guide plate.

3. A fireproof cable tray as described in claim 1, characterized in that, The bottom of the opening and closing plate has a connecting rod, and the other end of the fireproof rope is tied to the connecting rod; or, the bottom of the opening and closing plate has a threaded hole, and the other end of the fireproof rope is tied to a bolt, with the bolt threaded into the threaded hole on the opening and closing plate.

4. A fireproof cable tray as described in claim 1, characterized in that, The strip-shaped housing has an insertion hole on the outside of the vent, the size of which is larger than that of the vent, and the sealing plate is inserted into the insertion hole; wherein, the depth of the insertion hole is one-quarter of the depth of the vent, and the thickness of the sealing plate is the same as the depth of the insertion hole.

5. A fireproof cable tray as described in claim 1, characterized in that, The support frame includes: A sleeve is located directly below the opening and closing plate; connecting rods are connected to both sides of the sleeve, and the other ends of the two connecting rods are respectively connected to the opposite side walls of the strip-shaped housing; the inner diameter of the sleeve is larger than the maximum diameter of the thermosensitive glass body so that the thermosensitive glass body can pass through the sleeve. An insert is connected to the opening and closing plate; the opening of the insert faces downward, and the insert is inserted into the top of the thermosensitive glass body. A clamping cylinder is inserted into the bottom of the thermosensitive glass body; the outer peripheral wall of the clamping cylinder has external threads, and the inner peripheral wall of the sleeve has internal threads; Specifically, the thermosensitive glass body is pressed against the position between the insert and the clamping cylinder by the threaded engagement of the clamping cylinder and the sleeve; the distance between the sleeve and the opening and closing plate is greater than the radius of rotation of the opening and closing plate around the hinge axis.

6. A fireproof cable tray as described in claim 1, characterized in that, The top of the strip-shaped shell is the feed inlet, which is sealed by the top plate; The top plate has a plug-in component at its bottom, the outer peripheral wall of which contacts the inner peripheral wall of the strip-shaped housing; the outer peripheral wall of the plug-in component has several threaded holes, and the strip-shaped housing has through holes aligned with the threaded holes on the plug-in component; the strip-shaped housing and the plug-in component are connected by bolts.

7. A fireproof cable tray as described in claim 6, characterized in that, The cover plate is provided with L-shaped baffles on both sides of the top plate, and slots are formed between the L-shaped baffles and the cover plate. The two sides of the top plate are respectively inserted into the two slots. The L-shaped baffle has several threaded holes at its bottom, and the top plate has through holes aligned with the threaded holes of the L-shaped baffle. After the top plate is installed in place, it is fixed to the L-shaped baffle with bolts.

8. A fireproof cable tray as described in claim 1, characterized in that, The discharge port is a stepped hole, and the opening and closing plate abuts against the bottom wall of the stepped hole.

9. A fireproof cable tray as described in claim 8, characterized in that, The hinge side of the opening and closing plate has a through hole, and the strip housing also has a through hole at the hinge position of the opening and closing plate; after the hinge side of the opening and closing plate is placed into the corresponding position of the stepped hole, the hinge shaft is inserted from the outside of the strip housing, and the hinge shaft is engaged with the through hole of the opening and closing plate.

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