A 10kv power distribution cable wall bushing fireproof plugging device
Patent Information
- Application Number
- CN202522300046.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-30
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-30
AI Technical Summary
[0004]本实用新型的目的在于提供一种10kv变配电电缆穿墙板防火封堵装置，以解决上述背景技术提出的目前防火封堵结构中防火隔板与金属桥架外壁之间为刚性接触、密封不严，长期运行后易因材料收缩、热胀冷缩或振动产生缝隙，导致防火性能下降的问题
[0011]与现有技术相比，本实用新型的有益效果是：该10kv变配电电缆穿墙板防火封堵装置能够有效补偿桥架与墙体间的位移变形，提升了封堵部位的密封性和长期稳定性，防止火焰和烟气沿缝隙蔓延，增强了防火隔墙的完整性。该装置通过防火压板与调节压板之间设置橡胶弹性柱的弹性压紧结构，使防火压板始终贴合金属桥架外壁，补偿其热胀冷缩产生的位移，通过在防火压板角部外侧设置弹性缓冲垫，吸收角部应力，防止密封开裂，整体解决了传统封堵方式因刚性接触导致的界面缝隙问题。
Smart Images
Figure CN224790304U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire safety technology in power systems, specifically a fireproof sealing device for 10kV power distribution cable through-wall panels. Background Technology
[0002] In 10kV power distribution systems, cables often need to pass through building structures such as firewalls, floors, or equipment partition walls. To ensure the overall fire-resistant compartmentation function of the building, effective fireproof sealing must be carried out at the cable penetration points to prevent the spread of flames and high-temperature smoke through the cable channels during a fire, thus ensuring the effectiveness of the building's fire compartments.
[0003] Currently, common fireproofing methods often involve filling the exterior of enclosed metal cable trays with fire-resistant putty, fire-resistant bags, or fire-resistant boards. This type of structure typically involves fixing fire-resistant partitions to the outer walls of the metal cable trays on both sides, and filling the annular gap between the cable trays and the wall with fire-resistant material. However, this sealing method has a significant drawback: the fire-resistant partitions and the outer walls of the cable trays are in rigid contact, simply adhering without effective sealing measures. During long-term operation, the filling material is prone to shrinkage or embrittlement due to curing. Furthermore, slight expansion and contraction of the cable trays due to temperature fluctuations caused by load changes, or the effects of building vibrations, can lead to tiny gaps between the sealing material and the outer walls of the cable trays. In the event of a fire, these gaps can become channels for the rapid spread of flames and high-temperature smoke, thus weakening the firewall's isolation function and posing a safety hazard. Utility Model Content
[0004] The purpose of this utility model is to provide a fireproof sealing device for 10kV power distribution cable through-wall panels, in order to solve the problem mentioned in the background art that the fireproof partition and the outer wall of the metal cable tray are in rigid contact and the seal is not tight. After long-term operation, gaps are easily generated due to material shrinkage, thermal expansion and contraction or vibration, which leads to a decrease in fireproof performance.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a fireproof sealing device for 10kV power distribution cable through-wall panels, comprising a wall, a closed metal cable tray for laying cables passing through a perforation in the wall, fireproof pressure plates attached to the outer periphery of the metal cable tray, an adjusting pressure plate provided on the side of the fireproof pressure plate away from the metal cable tray, the adjusting pressure plate being fixed to the wall by an anchor bracket, multiple rubber elastic columns provided between the fireproof pressure plate and the adjusting pressure plate, and fireproof filling material filling the annular gap between the metal cable tray and the wall, and an elastic buffer pad provided on the outer corner of the fireproof pressure plate.
[0006] Preferably, the fireproof pressure plate is composed of two spliced calcium silicate boards, with the splice seam located at the center line of the side of the metal cable tray, and each calcium silicate board of the fireproof pressure plate has an inner layer of nitrile rubber bonded to it.
[0007] Preferably, the rubber elastic columns are evenly distributed along the length of one side of the metal cable tray, and there are 5 of them. Their two ends are embedded in the circular blind holes corresponding to the fireproof pressure plate and the adjusting pressure plate.
[0008] Preferably, the adjusting plate is provided with adjusting bolts, which pass through the adjusting plate and are threadedly connected to the anchor bracket, and there are no less than two adjusting bolts on each side of the adjusting plate.
[0009] Preferably, the anchor bracket is an L-shaped angle steel, the vertical section of which is fixed to the wall by expansion bolts, the horizontal section of which is provided with threaded holes, the adjusting bolts are screwed into the threaded holes, and four anchor brackets are provided on each side of the wall, respectively located at the four corners of the wall through holes.
[0010] Preferably, the elastic buffer pad is made of molded EPDM rubber, with its inner edge abutting the ends of the fireproof pressure plate and the adjusting pressure plate, and the outer side of the elastic buffer pad conforming to the perforated corner area of the wall.
[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: This 10kV power distribution cable through-wall fireproof sealing device can effectively compensate for the displacement deformation between the cable tray and the wall, improve the sealing performance and long-term stability of the sealed part, prevent flames and smoke from spreading along the gaps, and enhance the integrity of the fireproof partition. The device uses an elastic pressing structure with rubber elastic columns between the fireproof pressure plate and the adjusting pressure plate to ensure that the fireproof pressure plate always fits against the outer wall of the metal cable tray, compensating for displacement caused by thermal expansion and contraction. Elastic buffer pads are placed on the outer corners of the fireproof pressure plate to absorb corner stress and prevent seal cracking. Overall, this device solves the interface gap problem caused by rigid contact in traditional sealing methods. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the fireproof sealing device for a 10kV power distribution cable through-wall plate according to the present invention. Figure 2 This is a schematic diagram of the internal side view of the connection between the metal cable tray and the wall of a fireproof sealing device for 10kV power distribution cable through-wall. Figure 3 This is a schematic diagram of the external side view of the connection between the metal cable tray and the wall of a fireproof sealing device for 10kV power distribution cable through-wall.
[0013] In the diagram: 1. Wall; 2. Metal cable tray; 3. Fireproof pressure plate; 4. Adjustable pressure plate; 5. Anchor bracket; 6. Rubber elastic column; 7. Fireproof filling material; 8. Elastic buffer pad; 9. Adjusting bolt. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Please see Figure 1-3This utility model provides a technical solution: a fireproof sealing device for 10kV power distribution cable through-wall panels, including a wall 1, through which a closed metal cable tray 2 for laying cables passes. Fireproof pressure plates 3 are attached to the outer periphery of the metal cable tray 2. An adjusting pressure plate 4 is provided on the side of the fireproof pressure plate 3 away from the metal cable tray 2. The adjusting pressure plate 4 is fixed to the wall 1 by anchor brackets 5. Multiple rubber elastic posts 6 are provided between the fireproof pressure plate 3 and the adjusting pressure plate 4. The annular gap between the metal cable tray 2 and the wall 1 is filled with fireproof filling material 7. An elastic buffer pad 8 is provided on the outer corner of the fireproof pressure plate 3. The elastic buffer pad 8 has an annular structure. This structure allows the metal cable tray 2 to expand or contract axially due to temperature fluctuations caused by changes in cable load. Affected by building vibrations, the fireproof pressure plate 3 maintains a continuous radial clamping force on the outer wall of the metal cable tray 2 through the rubber elastic column 6. This elastic clamping force is transmitted from the adjusting pressure plate 4 to the fireproof pressure plate 3 via the rubber elastic column 6, ensuring that the fireproof pressure plate 3 is tightly fitted to the surface of the metal cable tray 2. This effectively compensates for the interface gap caused by thermal expansion and contraction. At the same time, the elastic buffer pads 8 at the four corners of the wall 1 perforation absorb the local stress concentration during the deformation of the cable tray, preventing the sealing structure from cracking first at the corners. The fireproof filling material 7 in the annular gap maintains a stable shape under the constraint of the fireproof pressure plate 3, avoiding detachment or the formation of through gaps. This ensures that the sealing structure of the entire through-wall area remains intact and sealed for a long time, solving the problem of rigid contact between the fireproof partition and the outer wall of the metal cable tray in the existing technology. The lack of an elastic compensation mechanism leads to shrinkage and debonding of the filling material, creating channels for the spread of flames and high-temperature smoke. This significantly improves the reliability and durability of the fire-stopping device under complex working conditions. The fireproof pressure plate 3 consists of two spliced calcium silicate boards, with the splice located at the center line of the side of the metal cable tray 2. Each calcium silicate board of the fireproof pressure plate 3 has an inner layer of nitrile rubber bonded to it. This structure, by dividing the fireproof pressure plate 3 into two spliced pieces, facilitates rapid assembly and positioning of the metal cable tray 2 on-site, improving construction efficiency. Simultaneously, the nitrile rubber layer bonded to the inner side of the fireproof pressure plate 3 directly adheres to the outer wall of the metal cable tray 2, enhancing interface sealing, effectively blocking smoke penetration, and buffering vibration stress to prevent the calcium silicate board from cracking due to hard contact. Rubber elastic columns 6 run along the metal cable tray 2. Five rubber elastic columns 6 are evenly distributed along the length of one side, with their ends embedded in the corresponding circular blind holes of the fireproof pressure plate 3 and the adjusting pressure plate 4. This structure ensures that the fireproof pressure plate 3 is subjected to balanced force, effectively transmitting the pre-tightening force applied by the adjusting pressure plate 4. At the same time, the compressive deformation capacity of the rubber elastic columns 6 continuously compensates for the expansion and contraction displacement of the metal cable tray 2 caused by temperature changes, ensuring that the fireproof pressure plate 3 is always tightly fitted to the outer wall of the cable tray and maintaining the long-term sealing performance of the sealing system. The adjusting pressure plate 4 is equipped with adjusting bolts 9, which pass through the adjusting pressure plate 4 and are threadedly connected to the anchor bracket 5. There are no less than two adjusting bolts 9 on each side of the adjusting pressure plate 4. This structure forms a threaded connection between the adjusting bolts 9 and the anchor bracket 5, realizing the adjustable and uniform distribution of the clamping force.To facilitate precise control of the contact pressure between the fireproof pressure plate 3 and the metal cable tray 2 during installation, ensuring reliable sealing, and enhancing the overall structural stability and vibration resistance, the anchor bracket 5 is an L-shaped angle steel. Its vertical section is fixed to the wall 1 by expansion bolts, and the horizontal section of the anchor bracket 5 has threaded holes into which adjusting bolts 9 are screwed. Four anchor brackets 5 are installed on each side of the wall 1, located at the four corners of the through-holes in the wall 1. This structure provides stable support by installing the anchor brackets 5 at the four corners of the through-holes in the wall 1, utilizing the firm connection between their vertical sections and the wall 1, and the threaded holes in the horizontal sections working in conjunction with the adjusting bolts 9 to achieve precise... The four-point symmetrical arrangement of the pressure plate effectively disperses the force, ensuring that the adjusting pressure plate 4 and the fireproof pressure plate 3 are evenly compressed around the metal cable tray 2, improving the overall rigidity and long-term stability of the sealing structure. The elastic buffer pad 8 is made of molded EPDM rubber, with its inner edge mating with the ends of the fireproof pressure plate 3 and the adjusting pressure plate 4. The outer side of the elastic buffer pad 8 fits against the perforated corner area of the wall 1. This structure allows the elastic buffer pad 8 to effectively absorb corner stress when the metal cable tray 2 experiences minor displacement or vibration, preventing the sealing structure from cracking in stress concentration areas while maintaining gap closure, ensuring the continuity and integrity of the fireproof sealing under complex working conditions.
[0016] Working principle: When using the 10kV power distribution cable through-wall fireproof sealing device, firstly, the metal cable tray 2 is passed through the perforation of the wall 1. Then, the two halves of the fireproof pressure plate 3 are respectively fitted onto the outer wall of the metal cable tray 2 from both sides, so that they fit circumferentially. Next, the adjusting pressure plate 4 is covered on the outside of the fireproof pressure plate 3. The elastic buffer pad 8 is placed on the outside of the corner of the fireproof pressure plate 3, with the outside fitting against the corner area of the perforation of the wall 1. Then, the anchor bracket 5 is fixed to the four corners on both sides of the wall 1 with expansion bolts. The adjusting bolts 9 are passed through the through holes on the adjusting pressure plate 4 and screwed into the threaded holes of the horizontal section of the anchor bracket 5. The adjusting bolts 9 are tightened one by one, so that the adjusting pressure plate 4 is pushed inward, compressing the rubber elastic column 6. The rubber elastic column 6 transmits the pressure to the fireproof pressure plate 3, so that it continuously presses the outer wall of the metal cable tray 2. At the same time, the annular gap between the metal cable tray 2 and the wall 1 is filled with fireproof filling material 7, thus completing a series of operations.
[0017] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A fireproof sealing device for 10kV power distribution cable through-wall, comprising a wall (1), wherein a closed metal cable tray (2) for laying cables passes through a hole in the wall (1), characterized in that: Fireproof pressure plates (3) are attached to the outer circumferential walls of the metal cable tray (2). An adjusting pressure plate (4) is provided on the side of the fireproof pressure plate (3) away from the metal cable tray (2). The adjusting pressure plate (4) is fixed to the wall (1) by the anchor bracket (5). Multiple rubber elastic columns (6) are provided between the fireproof pressure plate (3) and the adjusting pressure plate (4). The annular gap between the metal cable tray (2) and the wall (1) is filled with fireproof filling material (7). An elastic buffer pad (8) is provided on the outer corner of the fireproof pressure plate (3).
2. The fireproof sealing device for 10kV power distribution cable through-wall plate according to claim 1, characterized in that: The fireproof pressure plate (3) is composed of two spliced calcium silicate boards, with the splice seam located at the center line of the side of the metal cable tray (2), and each calcium silicate board of the fireproof pressure plate (3) has an inner layer of nitrile rubber bonded to it.
3. The fireproof sealing device for 10kV power distribution cable through-wall plate according to claim 1, characterized in that: The rubber elastic columns (6) are evenly distributed along the length of one side of the metal cable tray (2), and there are 5 of them. Their two ends are embedded in the circular blind holes corresponding to the fireproof pressure plate (3) and the adjusting pressure plate (4).
4. The fireproof sealing device for 10kV power distribution cable through-wall plate according to claim 1, characterized in that: The adjusting plate (4) is provided with adjusting bolts (9), which pass through the adjusting plate (4) and are threadedly connected to the anchor bracket (5). There are no fewer than two adjusting bolts (9) on each side of the adjusting plate (4).
5. A fireproof sealing device for 10kV power distribution cable through-wall plate according to claim 4, characterized in that: The anchor bracket (5) is an L-shaped angle steel. Its vertical section is fixed to the wall (1) by expansion bolts. The horizontal section of the anchor bracket (5) is provided with threaded holes. The adjusting bolt (9) is screwed into the threaded holes. There are four anchor brackets (5) on each side of the wall (1), located at the four corners of the through holes in the wall (1).
6. The fireproof sealing device for 10kV power distribution cable through-wall plate according to claim 1, characterized in that: The elastic buffer pad (8) is made of molded EPDM rubber, and its inner edge is connected to the end of the fireproof pressure plate (3) and the adjusting pressure plate (4). The outer side of the elastic buffer pad (8) is attached to the perforated corner area of the wall (1).