A cable shaft smoke evacuation device

Abstract

This utility model relates to a smoke extraction device for cable wells, belonging to the technical field of cable wells. It includes a cable well body and a smoke extraction well. The cable well body has multiple fireproof partitions along a vertical direction, each with a fireproof pressure plate above it. Multiple corresponding cable perforations are provided on the fireproof partitions and pressure plates, and fireproof sealant is placed inside the cable perforations. Smoke extraction pipes are installed on the cable well body between adjacent fireproof partitions, and smoke extraction fire dampers are installed on the smoke extraction pipes. This utility model's cable well body is divided by multiple fireproof partitions and pressure plates. Combined with the fireproof sealant inside the cable perforations, the cable well body can be segmented for fire protection. Furthermore, the smoke extraction pipes on the cable well body between adjacent fireproof partitions allow for segmented smoke extraction, preventing the formation of a "chimney effect" and better preventing the rapid spread of fire. The fireproof sealant is conical, and the fireproof pressure plate cooperates with the fireproof partitions to ensure the fireproof sealant adheres tightly to the cables.

Description

Technical Field

[0001] This utility model belongs to the field of cable well technology, specifically relating to a smoke exhaust device for cable wells. Background Technology

[0002] In modern urban construction, the number of high-rise buildings has increased dramatically. These buildings have complex functions and high population density, making fire safety paramount. Cable shafts, as crucial channels for power transmission in high-rise buildings, play an indispensable role. However, cable shafts have also gradually become areas prone to fires and posing significant risks, bringing serious challenges to the safety of high-rise buildings. Once a fire breaks out in a cable shaft, the consequences are extremely severe. Due to the vertical structure of cable shafts, they are highly susceptible to the "chimney effect," where, without obstruction, dense smoke from a fire spreads upwards within the shaft, causing the fire to expand rapidly and drastically increasing the difficulty of rescue operations. Utility Model Content

[0003] Therefore, it is necessary to provide a smoke extraction device for cable wells to address the existing technical problems.

[0004] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows:

[0005] A smoke exhaust device for cable wells includes a cable well body and a smoke exhaust manhole. The cable well body is provided with multiple fireproof partitions along the vertical direction. Each fireproof partition is provided with a fireproof pressure plate above it. The fireproof partitions and the fireproof pressure plate are provided with multiple corresponding cable through holes. The cable through holes of the fireproof partitions are conical with a lower diameter smaller than the upper diameter. Fireproof putty is provided inside the cable through holes. Smoke exhaust pipes are provided on the cable well bodies between adjacent fireproof partitions. Smoke exhaust fire dampers are provided on the smoke exhaust pipes.

[0006] As a preferred embodiment, a smoke sensor is installed on the cable shaft body between adjacent fireproof partitions. The smoke sensor is connected to a controller, and a smoke exhaust fan is installed at the top of the smoke exhaust shaft. The controller is connected to the smoke exhaust fire damper and the smoke exhaust fan. The smoke sensor can monitor the smoke situation in the shaft in real time. When smoke is detected, the controller automatically controls the smoke exhaust fire damper to open and the smoke exhaust fan to start, realizing automated linkage between smoke detection and smoke exhaust without manual operation, thus improving the timeliness and reliability of smoke exhaust.

[0007] As a preferred option, the cable well body has a multi-segment connection structure. This multi-segment design allows for flexible assembly of the cable well body according to the length requirements of the actual installation scenario, reducing transportation and installation difficulties and adapting to the size requirements of different projects.

[0008] As a preferred embodiment, each fireproof partition has a supporting boss on the cable well body beneath it. The fireproof partition and fireproof pressure plate are fixed to the supporting boss by fixing bolts. The supporting boss provides a stable support foundation for the fireproof partition, while the fixing bolts further securely fix the fireproof partition and fireproof pressure plate, ensuring that the fireproof partition is not easily displaced in special circumstances such as fire, thus enhancing structural stability.

[0009] As a preferred embodiment, the fireproof partition has a raised support ring on the outer side of the top of the cable perforation, and the fireproof pressure plate has a support recess that mates with the support ring. The mate between the support ring and the support recess allows for more precise positioning of the fireproof partition and the fireproof pressure plate during connection, and also makes the filling of fireproof sealant more convenient.

[0010] As a preferred embodiment, each cable well body above a fireproof partition is equipped with an access panel, which is hinged to an access door. The access door has a handle, and a fireproof sealing gasket is installed between the access door and the access panel. The access panel provides convenient access for the inspection, maintenance, and replacement of components inside the well; the handle facilitates the opening and closing of the access door; and the fireproof sealing gasket ensures the fireproof seal of the access panel when the access door is closed.

[0011] As a preferred option, the end of the exhaust pipe extending into the exhaust shaft is connected to an exhaust elbow via a flange, with the outlet of the exhaust elbow facing upwards. The flange connection facilitates the installation and disassembly of the exhaust pipe and exhaust elbow, making future maintenance and replacement easier. The upward-facing outlet of the exhaust elbow guides the smoke upwards into the exhaust shaft, ensuring smooth smoke entry and upward discharge, optimizing the exhaust path and improving exhaust efficiency.

[0012] The advantages of this utility model compared with the prior art are:

[0013] The cable well body is divided into sections by multiple fireproof partitions and fireproof pressure plates. Combined with fireproof putty inside the cable perforations, the cable well body can be divided into sections for fire prevention. Smoke exhaust pipes are installed on the cable well body between adjacent fireproof partitions to exhaust smoke in sections, preventing the formation of a "chimney effect" and better preventing the rapid spread of fire. The fireproof putty is conical, and the fireproof pressure plates work together with the fireproof partitions to ensure that the fireproof putty adheres tightly to the cable and prevents the fireproof putty from being carried out of the cable perforations when the cable moves up and down, thus affecting the fireproof effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Enlarged structural diagram at point A;

[0016] Figure 3 This is a structural diagram of the access door area;

[0017] Figure 4 This is a structural diagram of the smoke exhaust elbow;

[0018] The numbers on the map are:

[0019] 1. Smoke exhaust shaft; 2. Smoke exhaust pipe; 3. Cable well body; 4. Support ring platform; 5. Smoke sensor; 6. Fireproof putty; 7. Fireproof pressure plate; 8. Smoke exhaust fire damper; 9. Support boss; 10. Fireproof partition; 11. Cable; 12. Cable hole; 13. Handle; 14. Inspection door; 15. Smoke exhaust elbow; 16. Support recess; 17. Fixing bolt. Detailed Implementation

[0020] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0021] Example 1, Reference Figures 1 to 4 This utility model is a smoke exhaust device for cable wells, including a cable well body 3 and a smoke exhaust well 1. The cable well body 3 is provided with multiple fireproof partitions 10 along the vertical direction. Each fireproof partition 10 is provided with a fireproof pressure plate 7 above it. The fireproof partitions 10 and the fireproof pressure plate 7 are provided with multiple corresponding cable through holes 12. The cable through holes 12 of the fireproof partitions 10 are conical with a lower diameter smaller than the upper diameter. Fireproof putty 6 is provided inside the cable through holes 12. Smoke exhaust pipes 2 are provided on the cable well body 3 between adjacent fireproof partitions 10. Smoke exhaust fire dampers 8 are provided on the smoke exhaust pipes 2.

[0022] When installing cable 11, cable 11 passes through cable hole 12, fireproof putty 6 is inserted into cable hole 12 of fireproof partition 10, and fireproof pressure plate 7 presses down on fireproof partition 10. The fireproof putty 6 is squeezed and can tightly wrap cable 11, effectively preventing fire and smoke from spreading between different areas through cable hole 12. When there is a fire in cable well body 3, due to fireproof partition 10, fireproof pressure plate 7 and fireproof putty 6, and the bend setting of smoke exhaust pipe 2, smoke is exhausted in sections to prevent the formation of "chimney effect". Smoke enters smoke exhaust well 1 from smoke exhaust pipe 2 and is discharged.

[0023] In Example 2, based on Example 1, a smoke sensor 5 is installed on the cable well body 3 between adjacent fireproof partitions 10. The smoke sensor 5 is connected to a controller. A smoke exhaust fan is installed at the top of the smoke exhaust well 1. The controller is connected to the smoke exhaust fire damper 8 and the smoke exhaust fan. When the smoke sensor 5 detects smoke, it transmits a signal to the controller, which is a PLC controller. The controller then controls the smoke exhaust fire damper 8 to open and starts the smoke exhaust fan to achieve automatic smoke exhaust. Furthermore, the smoke exhaust fire damper 8 will open periodically to exhaust air and remove dust, keeping the inside of the cable well body 3 dry and clean.

[0024] The cable well body 3 is a multi-segment connected structure. This structural design facilitates flexible assembly according to the needs of the actual installation scenario, reducing the overall installation difficulty.

[0025] Each fireproof partition 10 has a support boss 9 on the cable well body 3 below it. The fireproof partition 10 and the fireproof pressure plate 7 are fixed to the support boss 9 by fixing bolts 17. When installing the fireproof partition 10 and the fireproof pressure plate 7, the fixing bolts 17 pass through the mounting holes on the fireproof partition 10 and the fireproof pressure plate 7 and are fixed to the support boss 9.

[0026] The fireproof partition 10 has a raised support ring 4 on the outer side of the top of the cable hole 12, and the fireproof pressure plate 7 has a support recess 16 that cooperates with the support ring 4. When the fireproof partition 10 and the fireproof pressure plate 7 are installed, the support ring 4 is inserted into the support recess 16, and the fireproof putty 6 is squeezed to tightly wrap the cable 11.

[0027] Each fireproof partition 10 has an inspection port on the cable well body 3 above it. The inspection port is hinged to an inspection door 14, which has a handle 13. A fireproof sealing gasket is provided between the inspection door 14 and the inspection port. The inspection door 14 can be opened periodically to facilitate the inspection and maintenance of the internal components of the cable well body 3.

[0028] The exhaust pipe 2 extends into the exhaust shaft 1 and is connected to an exhaust elbow 15 via a flange at one end. The outlet of the exhaust elbow 15 is set upwards.

[0029] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A smoke extraction device for a cable well, comprising a cable well body (3) and a smoke extraction well (1), characterized in that: The cable well body (3) is provided with multiple fireproof partitions (10) in the vertical direction. Each fireproof partition (10) is provided with a fireproof pressure plate (7) above it. The fireproof partitions (10) and the fireproof pressure plate (7) are provided with multiple corresponding cable holes (12). The cable holes (12) of the fireproof partitions (10) are conical with a lower diameter smaller than the upper diameter. Fireproof putty (6) is provided inside the cable holes (12). Smoke exhaust pipes (2) are provided on the cable well body (3) between adjacent fireproof partitions (10). Smoke exhaust fire dampers (8) are provided on the smoke exhaust pipes (2).

2. The smoke extraction device for a cable well according to claim 1, characterized in that, A smoke sensor (5) is installed on the cable well body (3) between adjacent fireproof partitions (10). The smoke sensor (5) is connected to a controller. A smoke exhaust fan is installed at the top of the smoke exhaust well (1). The controller is connected to the smoke exhaust fire damper (8) and the smoke exhaust fan.

3. The smoke extraction device for a cable well according to claim 1, characterized in that, The cable well body (3) is a multi-segment connection structure.

4. The smoke extraction device for a cable well according to claim 1, characterized in that, Each fireproof partition (10) has a support boss (9) on the cable well body (3) below it. The fireproof partition (10) and the fireproof pressure plate (7) are fixed to the support boss (9) by fixing bolts (17).

5. A smoke extraction device for a cable well according to claim 1, characterized in that, The cable perforation (12) of the fireproof partition (10) is provided with an upwardly protruding support ring platform (4) on the outer side of the top, and the fireproof pressure plate (7) is provided with a support recess (16) that cooperates with the support ring platform (4).

6. A smoke extraction device for a cable well according to claim 3, characterized in that, Each fireproof partition (10) has an inspection port on the cable well body (3) above it. The inspection port is hinged with an inspection door (14). The inspection door (14) has a handle (13). A fireproof sealing gasket is provided between the inspection door (14) and the inspection port.

7. A smoke extraction device for a cable well according to claim 1, characterized in that, The exhaust pipe (2) extends into the exhaust well (1) and is connected to an exhaust elbow (15) by a flange at one end. The outlet of the exhaust elbow (15) is set upward.

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