Double-layer fireproof and anti-condensation plugging device for bottom plate of electrical cabinet and construction method of double-layer fireproof and anti-condensation plugging device

Abstract

The invention belongs to the technical field of electrical cabinets, and relates to a double-layer fireproof and anti-condensation plugging device for a bottom plate of an electrical cabinet, and the device comprises a fireproof module which is located at the lower part of the bottom plate and is connected with the bottom plate, and the middle part of the fireproof module is provided with a first through hole; the first fireproof base plate is located on the lower portion of the bottom plate and connected with the bottom plate, a notch matched with the fireproof module is formed in the middle of the first fireproof base plate, and the fireproof module is arranged in the notch; and the second fireproof base plate is located on the lower portions of the fireproof module and the first fireproof base plate and connected with the fireproof module and the first fireproof base plate, and a second through opening is formed in the middle of the second fireproof base plate. According to the invention, aiming at double defects in fireproof and sealing performance in the prior art, a double-layer protection structure is constructed in the cable area at the lower part of the bottom plate, and a reliable protection scheme with fireproof and anti-condensation functions is provided for the electrical cabinet; a traditional single-layer blocking mode is broken through, and cooperative reinforcement of fireproof and sealing functions is achieved through the structural design of the fireproof module and the double-layer fireproof base plate.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical cabinets, and in particular relates to a double-layer fireproof and anti-condensation sealing device for an electrical cabinet bottom plate and a construction method thereof. Background Art

[0002] In urban power grid systems, electrical cabinets serve as key nodes for power distribution and transmission. Their safe and stable operation is directly related to the continuity and reliability of power supply. Because electrical cabinets are often installed outdoors and exposed to complex environments for long periods of time, drastic fluctuations in temperature and humidity can easily lead to condensation inside the cabinets. According to statistics, approximately 70%-80% of condensation problems in electrical cabinets are caused by defects in the cabinet floor seals. Furthermore, defects in the floor seals can cause component corrosion and degrade insulation performance, shortening equipment lifespan and significantly increasing the risk of fire. Furthermore, external flames can easily penetrate the cabinet through gaps in the floor, further exacerbating safety hazards. Therefore, achieving dual fire and condensation protection for electrical cabinet floors has become a critical issue that needs to be addressed in the field of power equipment safety.

[0003] Currently, there are two main solutions for sealing the bottom panels of electrical cabinets. The first is to add a shelf to the bottom of the cabinet and inject a foamed self-leveling material into the gap between the shelf and the cabinet. While this solution can initially fill the gap, the foamed self-leveling material tends to foam unevenly when injected over a large area, resulting in numerous gaps at the edges and ineffective sealing. Furthermore, the material tends to overflow upward from the cable holes into the cabinet, contaminating and interfering with the normal operation of internal electrical components. The second solution is to install a fireproof board at the bottom of the cabinet. While this can provide a certain degree of fire protection, a single fireproof board cannot fit tightly into the complex gap between the cables and the cabinet bottom panel, resulting in poor sealing, inability to block moisture intrusion, and ineffective anti-condensation effects. Summary of the Invention

[0004] The object of the present invention is to provide a double-layer fireproof and anti-condensation sealing device for the bottom plate of an electrical cabinet and a construction method thereof, so as to solve the technical problems raised in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A double-layer fireproof and condensation-proof sealing device for an electrical cabinet bottom plate, comprising:

[0007] The fireproof module is located at the lower part of the bottom plate and connected to the bottom plate, and has a through opening 1 in the middle thereof;

[0008] a first fireproof pad, located at the lower part of the bottom plate and connected to the bottom plate, with a notch adapted to the fireproof module opened in the middle, and the fireproof module is arranged inside the notch;

[0009] The second fireproof pad is located at the lower part of the fireproof module and the first fireproof pad and is connected to the fireproof module and the first fireproof pad, and a second opening is opened in the middle thereof.

[0010] As a further improvement of the present invention, the connection between the fireproof module and the fireproof pad is filled with fireproof sealant.

[0011] As a further improvement of the present invention, the connections between the fireproof module and the fireproof pad 1 and the base plate and the fireproof pad 2 are all provided with elastic adhesive sealant.

[0012] As a further improvement of the present invention, the outside of the sealing structure is sprayed with a moisture-proof sealant to form a continuous and dense moisture-proof film to block moisture from invading the interior of the cabinet.

[0013] As a further improvement of the present invention, cables are passed through the inside of the first and second openings, and fire-retardant paint is applied on the outer wall of the cables located below the second fire-retardant pad.

[0014] As a further improvement of the present invention, fireproof sealant is provided at the connection between the cable and the first and second openings.

[0015] A construction method for a double-layer fireproof and condensation-proof sealing device for an electrical cabinet bottom plate comprises the following steps:

[0016] Step 1: Apply fireproof sealant on the outer wall of the cable connected to the fireproof module and / or the side wall of the first opening, and apply elastic adhesive sealant on the upper surface of the fireproof module;

[0017] Step 2: Sleeve the fireproof module on the outer wall of the cable, and move the fireproof module to the lower part of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant;

[0018] Step 3: Apply elastic adhesive sealant on the upper surface of the fireproof backing plate;

[0019] Step 4: Place the fireproof backing plate on the outside of the fireproof module, and move the fireproof backing plate to the bottom of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant;

[0020] Step 5: Filling fireproof sealant at the connection between the fireproof backing plate 1 and the fireproof module;

[0021] Step 6: Apply elastic adhesive sealant on the upper surface of the second fireproof backing plate;

[0022] Step 7: Sleeve the second fireproof pad onto the outside of the cable, and at the same time move the second fireproof pad to the lower part of the first fireproof pad and the fireproof module and adhere the first fireproof pad and the fireproof module with an elastic adhesive sealant;

[0023] Step 8: Place a fixing rod under the second fireproof pad, with the top of the fixing rod in contact with the bottom of the second fireproof pad to fix the second fireproof pad;

[0024] Step 9: Filling elastic adhesive sealant into the gaps between the fireproof pad 1 and the bottom plate, the fireproof pad 1 and the fireproof pad 2, and the fireproof pad 2 and the cable;

[0025] Step 10: Apply fire retardant paint on the cable located below the second fireproof pad;

[0026] Step 11: Spray a moisture-barrier sealant on the outside of the block structure.

[0027] As a further improvement of the present invention, step 1s is further included before step 1: cutting the fire protection module and cutting a passage 1 in the middle of the fire protection module.

[0028] As a further improvement of the present invention, step 3s is further included before step 3: cutting a fireproof pad 1, and cutting a notch in the middle of the fireproof pad 1 that is adapted to the size of the fireproof module.

[0029] As a further improvement of the present invention, step 6s is further included before step 6: cutting the second fireproof pad and cutting the second opening in the middle of the second fireproof pad.

[0030] The beneficial effects of adopting the above technical solution are:

[0031] In response to the dual deficiencies of the existing technology in terms of fire prevention and sealing performance, the present invention constructs a double-layer protective structure in the cable area at the bottom of the bottom plate, providing a reliable protection solution for electrical cabinets that has both fire prevention and anti-condensation functions. Specifically, a fireproof module is set on the first floor to wrap the cables, and a fireproof pad 1 is nested on the outside of the fireproof module to achieve efficient fireproof isolation of the cable holes; a fireproof pad 2 is added to the lower layer to fit tightly with the first floor, further strengthening the sealing effect and achieving complete closure of the holes, thereby achieving the purpose of fire prevention and condensation prevention. Breaking through the traditional single-layer sealing method, the three-dimensional structural design of "fireproof module + double-layer fireproof pad" is used to achieve the synergistic enhancement of fire prevention and sealing functions.

[0032] The present invention uses fire-proof sealant to fill the space between the fire-proof module and the fire-proof pad to ensure peripheral sealing; uses elastic adhesive sealant to treat the gap, and uses spray-type moisture-proof sealant for overall protection. Finally, the bottom cable is coated with fire-proof paint, forming a complete protection system from structural design to material application, effectively overcoming the problems of uneven foaming, sealing failure, and insufficient fire protection in the existing technology.

[0033] The present invention avoids the problem of unstable effects caused by the existing technology's reliance on material properties through standardized construction steps and material combinations, and uses structural design to ensure the reliability and long-term effectiveness of protective performance, providing a more efficient and stable technical solution for the safe operation of electrical cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic structural diagram of Example 1 of the present invention;

[0035] Marking instructions in the figure: 1 fireproof module, 2 fireproof pad 1, 3 fireproof pad 2, 4 cable, 5 bottom plate. DETAILED DESCRIPTION

[0036] In order to better understand the purpose, structure and function of the present invention, the present invention is clearly and completely described below with reference to the accompanying drawings.

[0037] Example 1

[0038] like Figure 1 The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet shown in the figure comprises:

[0039] The fireproof module is located at the lower part of the base plate and is connected to the base plate. A through-port 1 is provided in the middle thereof, and the shape and size of the through-port 1 are adapted to the cable. Specifically, an elastic adhesive sealant is provided at the connection between the fireproof module and the base plate, and the module is connected to the base plate through the elastic adhesive sealant. A fireproof sealant is provided at the connection between the through-port 1 and the cable. In this embodiment, the fireproof module is made of an organic fireproof material with high expansion and low thermal conductivity, such as a polyurethane system with a size of 200mm×200mm×20mm. Specifically, Qiyan-QYM fireproof material can be used; the elastic adhesive sealant can be Qiyan-QZJ elastic adhesive sealant, and the fireproof sealant can be Qiyan-QYJ fireproof sealant.

[0040] Fireproof backing plate 1 is located below and connected to the base plate. A notch is defined in its center, compatible with the fireproof module. Fireproof backing plate 1 is made of a semi-rigid polyurethane foam composite, isocyanate, and other materials. The fireproof module is located within the notch, which measures 200mm x 200mm x 20mm. The connection between the fireproof module and fireproof backing plate 1 is filled with fireproof sealant to enhance the seal between the fireproof module and the cable. The connection between fireproof backing plate 1 and the base plate is provided with elastic adhesive sealant, thereby bonding fireproof backing plate 1 to the base plate.

[0041] The second fireproof backing plate is located below and connected to the fireproof module and the first fireproof backing plate. A second opening is defined in the middle thereof. The shape and size of the second opening are adapted to the cable, and a fireproof sealant is applied at the connection between the second opening and the cable. Furthermore, an elastic adhesive sealant is applied at the connection between the fireproof module, the first fireproof backing plate, and the second fireproof backing plate.

[0042] Cables are passed through the inside of the first and second passages, and fire-retardant paint is applied on the outer wall of the cables located below the second fire-retardant pad to form an additional fire-proof protective layer to prevent external flames from spreading to the inside of the cabinet through the cables. The fire-retardant paint can be Qiyan-QTL cable fire-retardant paint.

[0043] In addition, the exterior of this sealing structure is sprayed with a moisture-proof sealant to construct an overall moisture-proof layer, which is used to form a continuous and dense moisture-proof film to block moisture from invading the interior of the cabinet and further improve the anti-condensation performance. The moisture-proof sealant can be Qiyan-QPJ spray-type moisture-proof sealant.

[0044] This invention utilizes a nested double-layer fireproof backing plate structure, combined with an elastic adhesive sealant and fireproof sealant, to form a multi-layered sealing barrier. Compared to traditional foamed self-leveling materials, which are prone to uneven foaming and leaks, this invention seamlessly seals cable holes and gaps in the floor of electrical cabinets, improving condensation prevention by over 80%, effectively blocking moisture intrusion and preventing condensation-induced corrosion of internal cabinet components. Furthermore, a primary fireproof barrier centered around the fireproof module, combined with cable surface fireproof coating and an overall sealing structure, creates a three-dimensional fireproofing system, addressing the lack of fireproofing in traditional foamed materials and the insufficient sealing of fireproof panels.

[0045] The present invention adopts a variety of functional materials such as fireproof sealant, elastic adhesive sealant, moisture-proof sealant and fire-retardant coating, and accurately applies them according to the protection needs of different parts.

[0046] Example 2

[0047] A construction method for a double-layer fireproof and condensation-proof sealing device for an electrical cabinet bottom plate comprises the following steps:

[0048] Step 1s: Cut the fire protection module and cut a passage 1 in the middle of the fire protection module.

[0049] Step 1: Apply fireproof sealant on the outer wall of the cable connected to the fireproof module and / or the side wall of the first opening, and apply elastic adhesive sealant on the upper surface of the fireproof module;

[0050] Step 2: Sleeve the fireproof module on the outer wall of the cable, and move the fireproof module to the lower part of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant;

[0051] Step 3s: Cut the fireproof pad 1, and cut a notch in the middle of the fireproof pad 1 that matches the size of the fireproof module.

[0052] Step 3: Apply elastic adhesive sealant on the upper surface of the fireproof backing plate;

[0053] Step 4: Place the fireproof backing plate on the outside of the fireproof module, and move the fireproof backing plate to the bottom of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant;

[0054] Step 5: Filling fireproof sealant at the connection between the fireproof backing plate 1 and the fireproof module;

[0055] Step 6s: Cut the second fireproof pad, and cut the second opening in the middle of the second fireproof pad.

[0056] Step 6: Apply elastic adhesive sealant on the upper surface of the second fireproof backing plate;

[0057] Step 7: Sleeve the second fireproof pad onto the outside of the cable, and at the same time move the second fireproof pad to the lower part of the first fireproof pad and the fireproof module and adhere the first fireproof pad and the fireproof module with an elastic adhesive sealant;

[0058] Step 8: Place a fixing rod under the second fireproof pad, with the top of the fixing rod in contact with the bottom of the second fireproof pad to fix the second fireproof pad;

[0059] Step 9: Filling elastic adhesive sealant into the gaps between the fireproof pad 1 and the bottom plate, the fireproof pad 1 and the fireproof pad 2, and the fireproof pad 2 and the cable;

[0060] Step 10: Apply fire retardant paint on the cable located below the second fireproof pad;

[0061] Step 11: Spray a moisture-barrier sealant on the outside of the block structure.

[0062] This embodiment utilizes standardized material specifications and construction processes, avoiding the inconsistent sealing effects of traditional foam materials due to improper application. Precisely tailoring the fireproofing modules and backing plates, along with standardized gluing and filling processes, ensures consistent sealing results across diverse construction environments, improving construction efficiency by approximately 50% and effectively preventing material spillage and contamination of cabinet components.

[0063] Implementation Cases

[0064] Case 1: Conventional outdoor electrical cabinet bottom plate sealing

[0065] In the urban distribution network reconstruction project, the bottom plate of the outdoor conventional size electrical cabinet is sealed. The density of 0.8g / cm 3 Cut the fireproof module to 200mm x 200mm x 20mm, and create a central opening with a diameter matching the cable. After cleaning the cable surface, evenly apply fireproof sealant approximately 1mm thick to the interface between the cable and the fireproof module. Also, apply elastic adhesive sealant to the top surface of the fireproof module. Wrap the module tightly around the cable and secure it to the electrical cabinet floor.

[0066] Select a 20mm thick fireproof backing plate, cut out the middle 200mm x 200mm area, apply elastic adhesive sealant to the upper surface of the backing plate, nest it around the fireproof module, and secure it to the electrical cabinet floor. Fill the joint between the fireproof module and the backing plate with fireproof sealant to ensure there is no gap.

[0067] Install the second lower fireproof pad close to the bottom of the first floor, and also open the second opening in the middle to match the cable. After applying elastic adhesive sealant, wrap the cable and fix it under the first floor fireproof pad, and use fixing rods for temporary reinforcement.

[0068] Finally, elastic adhesive sealant was used to seal the gaps between the fireproof backing plate and the cabinet floor, the gaps between the two layers of fireproof backing plates, and the gaps between the fireproof backing plate openings and the cables. A spray-on moisture-proof sealant approximately 0.5mm thick was then applied to the entire cabinet. A fire-retardant coating approximately 1mm thick was applied to the cables below the bottom of the second fireproof backing plate. Testing showed that the internal humidity of the electrical cabinet remained within a safe range even after a week of continuous rain. Furthermore, in a simulated fire test, the fireproof sealant effectively blocked flames for over 120 minutes.

[0069] Case 2: Sealing the bottom plate of an electrical cabinet in a humid area

[0070] In the humid coastal areas of southern China, electrical cabinets exposed to high humidity for extended periods of time underwent floor sealing and renovation. Considering the high humidity, fireproof modules and fireproof backing plates with enhanced moisture resistance were selected. The fireproof modules were made of organic materials that had undergone a special waterproofing treatment.

[0071] The construction process is essentially the same as in Case 1, but during the sealing process, a larger amount of elastic adhesive sealant is used to ensure a complete seal. When spraying the moisture-proof sealant, two coats are applied, totaling a thickness of 1 mm, to further enhance moisture resistance.

[0072] After half a year of operational monitoring, no condensation was found inside the electrical cabinet, and the components remained in good condition. In the external fire simulation test, the fire-proof sealing structure effectively prevented the spread of flames, ensuring the safe operation of the electrical cabinet.

[0073] Case 3: Sealing the bottom plate of an electrical cabinet in a high-temperature area

[0074] In the high-temperature areas of the northwest, fireproof modules and fireproof pads with excellent high-temperature resistance are selected to address the problem of performance degradation of sealing materials that may occur in outdoor electrical cabinets under high-temperature environments.

[0075] During construction, special attention was paid to the high-temperature resistance of fireproof and elastic adhesive sealants, selecting adhesives suitable for high-temperature environments. After completing the double-layer protective structure and gap sealing, the sprayed moisture-proof sealant also exhibited excellent high-temperature resistance and would not melt or fail due to high temperatures.

[0076] After long-term testing in high-temperature environments, the electrical cabinet bottom plate sealing structure still maintains good sealing and fire-proof performance in extremely high-temperature weather in summer, effectively preventing the risk of fire and moisture intrusion caused by high temperature.

[0077] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A double-layer fireproof and anti-condensation sealing device for the bottom plate of an electrical cabinet, characterized by: It includes: The fireproof module is located at the lower part of the bottom plate and connected to the bottom plate, and has a through opening 1 in the middle thereof; a first fireproof pad, located at the lower part of the bottom plate and connected to the bottom plate, with a notch adapted to the fireproof module opened in the middle, and the fireproof module is arranged inside the notch; The second fireproof pad is located at the lower part of the fireproof module and the first fireproof pad and is connected to the fireproof module and the first fireproof pad, and a second opening is opened in the middle thereof.

2. The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet according to claim 1, characterized in that: The connection between the fireproof module and the fireproof pad is filled with fireproof sealant.

3. The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet according to claim 1, characterized in that: The connections between the fireproof module and the first fireproof pad and the bottom plate and the second fireproof pad are all provided with elastic adhesive sealant.

4. The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet according to claim 1, characterized in that: The outside of the sealing structure is sprayed with a moisture-proof sealant to form a continuous and dense moisture-proof film to block moisture from invading the interior of the cabinet.

5. The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet according to claim 1, characterized in that: Cables are passed through the first and second passages, and fire-retardant paint is applied on the outer walls of the cables located below the second fire-retardant pad.

6. The double-layer fireproof and condensation-proof sealing device for the bottom plate of an electrical cabinet according to claim 5, characterized in that: Fireproof sealant is provided at the connection between the cable and the first and second passages.

7. A construction method for a double-layer fireproof and anti-condensation sealing device for an electrical cabinet bottom plate according to any one of claims 1 to 6, characterized in that: It includes the following steps: Step 1: Apply fireproof sealant on the outer wall of the cable connected to the fireproof module and / or the side wall of the first opening, and apply elastic adhesive sealant on the upper surface of the fireproof module; Step 2: Sleeve the fireproof module on the outer wall of the cable, and move the fireproof module to the lower part of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant; Step 3: Apply elastic adhesive sealant on the upper surface of the fireproof backing plate; Step 4: Place the fireproof backing plate on the outside of the fireproof module, and move the fireproof backing plate to the bottom of the bottom plate and adhere it to the bottom plate with elastic adhesive sealant; Step 5: Filling fireproof sealant at the connection between the fireproof backing plate 1 and the fireproof module; Step 6: Apply elastic adhesive sealant on the upper surface of the second fireproof backing plate; Step 7: Sleeve the second fireproof pad onto the outside of the cable, and at the same time move the second fireproof pad to the lower part of the first fireproof pad and the fireproof module and adhere the first fireproof pad and the fireproof module with an elastic adhesive sealant; Step 8: Place a fixing rod under the second fireproof pad, with the top of the fixing rod in contact with the bottom of the second fireproof pad to fix the second fireproof pad; Step 9: Filling elastic adhesive sealant into the gaps between the fireproof pad 1 and the bottom plate, the fireproof pad 1 and the fireproof pad 2, and the fireproof pad 2 and the cable; Step 10: Apply fire retardant paint on the cable located below the second fireproof pad; Step 11: Spray a moisture-barrier sealant on the outside of the block structure.

8. The construction method of the double-layer fireproof and anti-condensation sealing device for the bottom plate of an electrical cabinet according to claim 7, characterized in that: Before step 1, step 1s is also included: cutting the fire protection module and cutting a passage 1 in the middle of the fire protection module.

9. The construction method of the double-layer fireproof and anti-condensation sealing device for the bottom plate of an electrical cabinet according to claim 7, characterized in that: Before step 3, step 3s is also included: cutting the fireproof pad 1, and cutting a notch in the middle of the fireproof pad 1 that is compatible with the size of the fireproof module.

10. The construction method of the double-layer fireproof and anti-condensation sealing device for the bottom plate of an electrical cabinet according to claim 7, characterized in that: The step 6 also includes step 6s before step 6: cutting the second fireproof pad and cutting the second opening in the middle of the second fireproof pad.

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