Cable well capable of preventing molten liquid from flowing backwards

Abstract

The utility model belongs to the technical field of electrical engineering in the metallurgical industry, and particularly discloses a cable well capable of preventing molten liquid from flowing backwards, a concave groove is formed in the periphery of an opening in the upper end of a well body, high-temperature-resistant particles are tightly stacked in the groove, a top cover covers the opening in the upper end of the well body, and the top cover is arranged on the bottom of the well body. The bottom of the top cover abuts against and makes contact with the upper opening edge of the well body, the edge of the top cover is bent downwards to form a continuous bent part, the bent part is inserted into the high-temperature-resistant particles tightly stacked in the groove, and under the action of the gravity of the top cover and the friction force between the bent part of the top cover and the particles, the top cover can stably cover the opening in the upper end of the well body. The high-temperature-resistant particles filled in the top cover and the groove can effectively prevent high-temperature liquid such as molten liquid from flowing backwards into the cable well body, and the purpose of protecting the safety of the cable and related equipment is achieved at the lowest cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical engineering in the metallurgical industry, and specifically discloses a cable well for preventing molten liquid from flowing back. Background Art

[0002] In industries such as petroleum, chemical industry, and metallurgy, cable wells, as important facilities for power transmission and communication, their safety is crucial. However, in extreme situations such as fires and explosions, high-temperature liquids such as molten metal may flow back into the well through the gaps or openings of the cable well, causing serious damage to the cables and supporting facilities, and even triggering secondary disasters.

[0003] Currently, in the metallurgical industry, cable wells are mainly divided into two structural types: steel covers and concrete covers. In the use of conventional steel cover cable wells, the edges of the covers often warp. On the one hand, dangerous high-temperature liquids will flow into the cable well from the edges of the covers. On the other hand, if not replaced and maintained in time, it will also pose a safety hazard of no small harm to on-site workers; Concrete cover cable wells are commonly used in heavy-duty floor areas. To prevent dangerous liquids from damaging the cables in the well, the conventional measure is to fill the cable well with sand. However, the sand in the full pit, on the one hand, weakens the heat dissipation effect of the cables, resulting in an increase in the working temperature of the cables, a decrease in the actual current-carrying capacity of the cables, and an acceleration of the aging speed of the sheath insulation layer, which is not conducive to the long-term stable operation of the cables; On the other hand, during the later cable maintenance, compared with the steel cover cable well, the concrete cover cable well requires more manpower and material resources for sand cleaning and cover opening, increasing the maintenance time and labor costs; With the development of society and the progress of science and technology, the wide application of intelligent technologies such as big data and cloud computing in the metallurgical industry, intelligent electrical monitoring equipment cannot be installed in the cable well filled with sand, seriously hindering the pace of intelligent upgrading and transformation of the enterprise's electrical system. Summary of the Invention

[0004] In order to solve the problems in the background art, the utility model discloses a cable well for preventing molten liquid from flowing back, including a top cover and a seal, ensuring the effective sealing of the cable well under extreme conditions and preventing the intrusion of high-temperature liquids such as molten liquid.

[0005] To achieve the above invention purpose, the utility model adopts the following technical solutions:

[0006] A cable well for preventing molten liquid from flowing back includes a well body. A recessed groove is provided on the periphery of the upper opening of the well body. The groove extends along the circumference of the upper opening of the well body. Heat-resistant particles are tightly packed in the groove. A top cover is covered at the upper opening of the well body. The bottom of the top cover is in tight contact with the upper edge of the well body. The edge of the top cover is bent downward to form a continuous bending part, and the bending part is inserted into the heat-resistant particles tightly packed in the groove.

[0007] Further, for the cable well preventing backflow of molten liquid, the depth of the groove is not less than one-third of the depth of the well body.

[0008] Further, for the cable well preventing backflow of molten liquid, a retaining ring is provided at the position corresponding to the upper edge of the well body at the bottom of the top cover. The retaining ring includes a pressing portion that is in tight contact with the upper edge of the well body. The top of the pressing portion is connected to the bottom of the top cover, and the outer edge of the pressing portion extends obliquely downward.

[0009] Further, for the cable well preventing backflow of molten liquid, a sealing member is embedded between the pressing portion of the retaining ring and the upper edge of the well body.

[0010] Further, for the cable well preventing backflow of molten liquid, the height of the bending portion along the axial direction of the well body is 8-9 times the thickness of the top cover.

[0011] Further, for the cable well preventing backflow of molten liquid, the high-temperature resistant particulate matter tightly packed in the groove is quartz sand.

[0012] Further, for the cable well preventing backflow of molten liquid, the groove is continuously laid by a number of corner guard steel bars.

[0013] Further, for the cable well preventing backflow of molten liquid, a number of reinforcing ribs are provided at the bottom of the top cover.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] For the cable well preventing backflow of molten liquid disclosed by the present utility model, a recessed groove is provided on the periphery of the upper end opening of the well body. High-temperature resistant particulate matter is tightly packed in the groove. A top cover is covered at the upper end opening of the well body. The bottom of the top cover is in tight contact with the upper edge of the well body. The edge of the top cover is bent downward to form a continuous bending portion. The bending portion is inserted into the high-temperature resistant particulate matter tightly packed in the groove. Under the action of the gravity of the top cover and the friction between the bending portion of the top cover and the particulate matter, the top cover can be stably covered at the upper end opening of the well body. The top cover and the high-temperature resistant particulate matter filled in the groove can effectively prevent high-temperature liquids such as molten liquid from flowing back into the interior of the cable well body, achieving the purpose of protecting the safety of cables and related equipment at the lowest cost;

[0016] For the cable well preventing backflow of molten liquid disclosed by the present utility model, the structure is reasonably designed and the materials are properly selected, having high durability and reliability, meeting the characteristics of industrial workshops; at the same time, the hollow interior of the cable well body provides convenient conditions for the installation of subsequent automatic monitoring devices, improving the intelligent level of engineering design and reducing the later manual inspection and maintenance costs. Description of the Drawings

[0017] Figure 1 is a schematic cross-sectional structure diagram of the cable well of the present utility model;

[0018] Figure 2 is Figure 1 an enlarged structure diagram of the partial area A in

[0019] In the above figures: 1 - top cover; 2 - first corner guard angle steel; 3 - second corner guard angle steel; 4 - anchor bolt; 5 - well body; 6 - reinforcing rib; 7 - particulate matter; 8 - base; 9 - retaining ring; 10 - seal. Detailed implementation manners

[0020] For a better understanding of the present utility model, the content of the present utility model will be further clarified below in conjunction with embodiments. However, the content of the present utility model is not limited to the following embodiments only.

[0021] Combined with the attached Figure 1 and the attached Figure 2 , a cable well for preventing backflow of molten liquid of the present utility model is elaborated in detail. The cable well includes a well body 5. A recessed groove is provided on the periphery of the upper opening of the well body 5. The groove extends along the circumferential direction of the upper opening of the well body 5. Heat-resistant particulate matter 7 is densely packed in the groove. A top cover 1 is covered at the upper opening of the well body 5. The top cover 1 is square, rectangular, circular or the like that is matched with the well body 5. The material of the top cover 1 is heat-resistant steel plate. The bottom of the top cover 1 is in tight contact with the upper edge of the well body 5. The edge of the top cover 1 is bent downward to form a continuous bent portion. The bent portion is inserted into the heat-resistant particulate matter 7 densely packed in the groove. Under the action of the gravity of the top cover 1 and the friction force between the bent portion of the top cover 1 and the particulate matter 7, the top cover 1 can be stably covered at the upper opening of the well body 5. The butt joints at the edges of the top cover 1 are all welded or fully welded to ensure the design and construction quality. The top cover 1 and the heat-resistant particulate matter 7 filled in the groove can effectively prevent high-temperature liquids such as molten liquid from flowing back into the interior of the cable well body 5, achieving the purpose of protecting the safety of cables and related equipment. The particulate matter 7 is only filled in the grooves around the cable well, greatly reducing the risk of damage to the cables during later maintenance and inspection, providing a cable connection method for engineering design that is simple to manufacture, safe and reliable to use, and convenient to maintain. The structure design is reasonable and the material selection is appropriate, with high durability and reliability, meeting the characteristics of industrial workshops; at the same time, the hollow interior of the cable well body 5 provides convenient conditions for the installation of subsequent automatic monitoring devices, improving the intelligent level of engineering design and reducing the later manual inspection and maintenance costs.

[0022] As an optional design, it is preferred for the cable well for preventing backflow of molten liquid that the depth of the groove is not less than one-third of the depth of the well body 5, and the heat-resistant particulate matter 7 filled in the groove is flush with the top of the top cover 1.

[0023] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, a retaining ring 9 is provided at a position corresponding to the upper edge of the well body 5 at the bottom of the top cover 1. The retaining ring 9 includes a pressing portion that is in tight contact with the upper edge of the well body 5. The top of the pressing portion is connected to the bottom of the top cover 1. The outer edge of the pressing portion extends obliquely downward, and the retaining ring 9 can further prevent molten liquid from entering the cable well body 5.

[0024] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, a seal 10 is embedded between the pressing portion of the retaining ring 9 and the upper edge of the well body 5, and the seal 10 is a high-temperature resistant seal.

[0025] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, the height of the bent portion along the axial direction of the well body 5 is 8 - 9 times the thickness of the top cover 1, and the bending radius is about 1 times the thickness of the steel plate.

[0026] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, the high-temperature resistant particulate matter 7 tightly packed in the groove is quartz sand. The sand that prevents molten liquid from entering the cable well is only filled in the grooves around the cable well, greatly reducing the risk of damage to the cable during later maintenance and inspection, and providing a cable connection method for engineering design that is simple to manufacture, safe and reliable to use, and convenient to maintain.

[0027] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, the groove is formed by continuously laying a number of corner angle steels. The corner angle steels include a number of first corner angle steels 2 with unequal sides and second corner angle steels 3 with equal sides. The long side of the first corner angle steel 2 is closely attached to the outer wall of the upper end of the well body 5, and the short side of the first corner angle steel 2 is arranged at the bottom of the groove. The second corner angle steel 3 is anchored in the base 8 on the outer edge of the well body 5 by anchor bolts 4. One side of the second corner angle steel 3 is arranged parallel to the long side of the first corner angle steel, and the other side of the second corner angle steel 3 is arranged at the outer edge of the groove. The first corner angle steel 2 and the second corner angle steel 3 with equal sides ensure the stability of the groove structure.

[0028] As an alternative design, it is preferable that in the cable well for preventing backflow of molten liquid, a number of raised reinforcing ribs 6 are provided at the bottom of the top cover 1 to improve the overall strength of the top cover 1. The ends of the reinforcing ribs 6 extend to a position adjacent to the retaining ring 9. The reinforcing ribs 6 do not contact the retaining ring 9, and the reinforcing ribs 6 are adapted to the cable well body 5 to ensure that the top cover 1 does not deform or shift during the use of the cable well. It should be noted here that a number of pull rings (not shown in the drawings) are also welded on the top of the top cover 1 to facilitate the opening of the top cover 1.

[0029] The working process of the present utility model is as follows:

[0030] As shown in the atta Figure 1 and atta Figure 2As shown in the figure, a groove with an open upper end is formed around the upper opening of the well body 5 by using several first protective angle steels 2 and equilateral second protective angle steels 3. The edge of the top cover 1 is bent downward, and the splicing part is welded firmly to form a continuous bent part. After the electrical construction is completed, the groove is filled with sand particles 7. Then, the bent part of the customized top cover 1 is inserted into the sand particles 7. Due to the tight packing of the sand particles 7, the friction between the sand particles 7 and the bent part is very large. Under the action of the gravity of the top cover 1 and the friction between the bent part of the top cover 1 and the particles 7, the top cover 1 can be stably covered at the upper opening of the well body 5. The thickness of the top cover 1 should be designed according to the load conditions provided by the main professional, and the bottom plate reinforcement ribs 6 of the top cover 1 are adapted to the cable well body 5 to ensure that the top cover 1 does not deform or shift during the use of the cable well. The cable well for preventing molten liquid backflow disclosed by the present utility model uses high-quality steel plates, angle steels and other materials to form a semi-closed groove around the cable well body 5. Through the comprehensive action of materials such as the top cover 1 and the sand particles 7, it can effectively prevent high-temperature liquids such as molten liquids from backflowing into the cable well interior, achieving the purpose of protecting the safety of cables and related equipment.

[0031] The above description is only the application implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. The scope of rights of the present utility model cannot be limited by this. Any equivalent changes made according to the technical solution of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A cable shaft for preventing backflow of molten liquid, comprising a shaft body, characterized in that: at A groove is provided around the upper opening of the well body, which is recessed and extends circumferentially along the upper opening of the well body. Heat-resistant particulate matter is tightly packed in the groove. A top cover is covered at the upper opening of the well body. The bottom of the top cover is in tight contact with the upper edge of the well body. The edge of the top cover is bent downward to form a continuous bent portion, and the bent portion is inserted into the heat-resistant particulate matter tightly packed in the groove.

2. The cable shaft for preventing backflow of molten liquid according to claim 1, wherein: The depth of the groove is not less than one-third of the depth of the well body.

3. The cable trench for preventing backflow of molten liquid according to claim 1 or 2, characterized in that: in A retaining ring is provided at the position corresponding to the upper edge of the well body at the bottom of the top cover. The retaining ring includes a pressing portion that is in tight contact with the upper edge of the well body. The top of the pressing portion is connected to the bottom of the top cover, and the outer edge of the pressing portion extends obliquely downward.

4. The cable shaft for preventing backflow of molten liquid according to claim 3, characterized in that: A sealing member is embedded between the pressing portion of the retaining ring and the upper edge of the well body.

5. The cable shaft for preventing backflow of molten liquid according to claim 3, characterized in that: The height of the bent portion along the axial direction of the well body is 8-9 times the thickness of the top cover.

6. The cable shaft for preventing backflow of molten liquid according to claim 3, characterized in that: The heat-resistant particulate matter tightly packed in the groove is quartz sand.

7. The cable shaft for preventing backflow of molten liquid according to claim 3, characterized in that: The groove is formed by continuously laying a number of corner guard steel bars.

8. The cable shaft for preventing backflow of molten liquid according to claim 3, characterized in that: A number of reinforcing ribs are provided at the bottom of the top cover.

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