Cable well capable of preventing molten liquid from flowing backwards

Abstract

The invention belongs to the technical field of electrical engineering in the metallurgical industry, and particularly discloses an electric 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, and a top cover covers the opening in the upper end 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 invention 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 the petroleum, chemical, metallurgical and other industries, cable wells are important facilities for power transmission and communication, and their safety is of vital importance. However, in extreme cases such as fire and explosion, molten metal and other high-temperature liquids 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 causing secondary disasters.

[0003] At present, in the metallurgical industry, cable wells are mainly divided into two structural types: steel cover and concrete cover. Conventional steel cover cable wells often have warped edges during use. On the one hand, dangerous high-temperature liquids will flow into the cable well from the edge of the cover. On the other hand, if they are not replaced and maintained in time, they will also bring considerable safety hazards to on-site workers. Concrete cover cable wells are often used in heavy-loaded floor areas. In order to prevent dangerous liquids from damaging the cables in the well, the conventional measure is to fill the cable well with sand. However, the full pit of sand weakens the heat dissipation effect of the cable, causing the operating temperature of the cable to increase, reducing the actual current carrying capacity of the cable, and accelerating the aging of the sheath insulation layer, which is not conducive to the long-term stable operation of the cable. On the other hand, in the later cable maintenance, compared with steel cover cable wells, concrete cover cable wells require more manpower and material support when cleaning sand and opening the cover, which increases maintenance time and labor costs. With the development of society and the advancement of science and technology, big data, cloud computing, and other intelligent technologies are widely used in the metallurgical industry. Intelligent electrical monitoring equipment cannot be installed in sand-filled cable wells, which seriously hinders the pace of intelligent upgrading and transformation of corporate electrical systems. Summary of the invention

[0004] In order to solve the problem in the background technology, the present invention discloses a cable well for preventing backflow of molten liquid, including a top cover and a seal, which ensures effective sealing of the cable well under extreme conditions and prevents the intrusion of high-temperature liquids such as molten liquid.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A cable well for preventing backflow of molten liquid comprises a well body, wherein a recessed groove is provided on the periphery of an opening at the upper end of the well body, the groove extends circumferentially along the opening at the upper end of the well body, high temperature resistant particles are tightly packed in the groove, a top cover is covered on the opening at the upper end 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 tightly packed high temperature resistant particles in the groove.

[0006] Furthermore, in the cable well for preventing the backflow of molten liquid, the depth of the groove is not less than one third of the depth of the well body.

[0007] Furthermore, the cable well for preventing the backflow of molten liquid is provided with a retaining ring at a position corresponding to the bottom of the top cover and the upper edge of the well body, and 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.

[0008] Furthermore, in the cable well for preventing the backflow of molten liquid, a sealing member is embedded between the abutting portion of the retaining ring and the upper edge of the well body.

[0009] Furthermore, in the cable well for preventing backflow of molten liquid, the height of the bent portion along the axial direction of the well body is 8-9 times the thickness of the top cover.

[0010] Furthermore, in the cable well for preventing backflow of molten liquid, the high-temperature resistant particles tightly packed in the groove are quartz sand.

[0011] Furthermore, in the cable well for preventing the backflow of molten liquid, the groove is formed by continuously laying a plurality of edge protection angle steels.

[0012] Furthermore, the cable well for preventing the backflow of molten liquid is provided with a plurality of reinforcing ribs at the bottom of the top cover.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The cable well for preventing molten liquid from flowing back is provided with a concave groove at the periphery of the opening at the upper end of the well body, and high-temperature resistant particles are tightly stacked in the groove. A top cover is covered at the opening at the upper end of the well body, and the bottom of the top cover is in close contact with the upper edge of the well body. The edge of the top cover is bent downward to form a continuous bending portion, and the bending portion is inserted into the high-temperature resistant particles tightly stacked 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 particles, the top cover can stably cover the opening at 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 liquids such as molten liquid from flowing back into the interior of the cable well body, thereby achieving the purpose of protecting the safety of cables and related equipment at the lowest cost. The cable well for preventing backflow of molten liquid disclosed in the present invention has a reasonable structural design, appropriate material selection, high durability and reliability, and meets the characteristics of industrial workshops; at the same time, the interior of the hollow cable well body provides convenient conditions for the installation of subsequent automatic monitoring devices, improves the intelligence level of engineering design, and reduces the subsequent manual inspection and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the cable well of the present invention; Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the local A in the middle; In the above figure: 1-top cover; 2-first edge protection angle steel; 3-second edge protection angle steel; 4-anchor nail; 5-well body; 6-reinforcement ribs; 7-particles; 8-base; 9-retaining ring; 10-seal. DETAILED DESCRIPTION

[0015] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0016] Combined with Figure 1 and attached Figure 2 , the present invention is a cable well for preventing molten liquid from backflowing, comprising a well body 5, a concave groove is provided on the periphery of the upper opening of the well body 5, the groove extends along the circumference of the upper opening of the well body 5, and high-temperature resistant particles 7 are tightly stacked in the groove, and a top cover 1 is covered at the upper opening of the well body 5, and the top cover 1 is a square, rectangular or circular shape that matches the well body 5. The material of the top cover 1 is a high-temperature resistant steel plate, and the bottom of the top cover 1 is in close contact with the upper edge of the well body 5. The edge of the top cover 1 is bent downward to form a continuous bending portion, and the bending portion is inserted into the high-temperature resistant particles 7 tightly stacked in the groove. Under the action of the gravity of the top cover 1 and the friction between the bending portion of the top cover 1 and the particles 7, the top cover 1 can stably cover the upper opening of the well body 5, and the top The joints on the edges of the cover 1 are welded or fully welded to ensure the design and construction quality. The high-temperature resistant particles 7 filled in the top cover 1 and the grooves can effectively prevent high-temperature liquids such as molten liquid from flowing back into the cable well 5, thereby protecting the safety of cables and related equipment. The particles 7 are only filled in the grooves around the cable well, which greatly reduces the risk of damage to the cables during subsequent maintenance and inspections, and provides a cable switching method for engineering design that is simple to make, safe and reliable to use, and convenient to maintain. The structural design is reasonable, the materials are appropriately selected, and it has high durability and reliability, which meets the characteristics of industrial workshops. At the same time, the interior of the hollow cable well 5 provides convenient conditions for the installation of subsequent automated monitoring devices, improves the intelligence level of engineering design, and reduces the cost of subsequent manual inspections and maintenance.

[0017] As an optional design, the cable well for preventing the backflow of molten liquid is preferably such that the depth of the groove is not less than one third of the depth of the well body 5 , and the high temperature resistant particles 7 filled in the groove are flush with the top of the top cover 1 .

[0018] As an optional design, the cable well that prevents the backflow of molten liquid is preferably provided with a retaining ring 9 at a position corresponding to the bottom of the top cover 1 and the upper edge of the well body 5, the retaining ring 9 includes a tightening portion that is in tight contact with the upper edge of the well body 5, the top of the tightening portion is connected to the bottom of the top cover 1, and the outer edge of the tightening portion extends downward at an angle, so that the retaining ring 9 can further prevent the molten liquid from entering the cable well body 5.

[0019] As an optional design, the cable well for preventing the backflow of molten liquid is preferably provided with a seal 10 embedded between the abutment 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.

[0020] As an optional design, the cable well for preventing the backflow of molten liquid is preferably such that the height of the bending 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.

[0021] As an optional design, the cable well that prevents the backflow of molten liquid is preferably, and the high-temperature resistant particles 7 tightly stacked in the groove are quartz sand. The sand that blocks the molten liquid from entering the cable well is only filled in the grooves around the cable well, which greatly reduces the risk of damage to the cable during subsequent maintenance and inspection, and provides a cable switching method for engineering design that is simple to manufacture, safe and reliable to use, and convenient to maintain.

[0022] As an optional design, the cable well for preventing the backflow of molten liquid is preferred, and the groove is formed by continuously laying a plurality of edge protection angles, and the edge protection angles include a plurality of unequal first edge protection angles 2 and equal second edge protection angles 3, the long sides of the first edge protection angles 2 are close to the upper outer wall of the well body 5, the short sides of the first edge protection angles 2 are arranged at the bottom of the groove, the second edge protection angles 3 are anchored in the base 8 at the outer edge of the well body 5 by anchor nails 4, one side of the second edge protection angle 3 is arranged parallel to the long side of the first edge protection angle, and the other side of the second edge protection angle 3 is arranged at the outer edge of the groove, the first edge protection angle 2 and the equal second edge protection angle 3 ensure the stability of the groove structure.

[0023] As an optional design, the cable well that prevents the backflow of molten liquid is preferably provided with a plurality of raised reinforcing ribs 6 at the bottom of the top cover 1 to improve the overall strength of the top cover 1, and the ends of the reinforcing ribs 6 extend to the 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 of the cable well does not deform or shift during use. It should be noted here that a plurality of pull rings (not shown in the drawings) are welded on the top of the top cover 1 to facilitate the opening of the top cover 1.

[0024] The working process of the present invention is as follows: As attached Figure 1 and attached Figure 2As shown, a plurality of first edge protection angle steels 2 and equilateral second edge protection angle steels 3 are used to surround the outer periphery of the upper opening of the well body 5 to form an open groove at the upper end, the edge of the top cover 1 is bent downward, and the joints are welded firmly to form a continuous bending portion. After the electrical construction is completed, the groove is filled with sand particles 7, and then the bent portion of the customized top cover 1 is inserted into the sand particles 7. Since the sand particles 7 are closely packed, the friction between the sand particles 7 and the bent components is very large. Under the action of the gravity of the top cover 1 and the friction between the bent portion of the top cover 1 and the particles 7, the top cover 1 can be stably The cover is closed on 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 body, and the bottom 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 the backflow of molten liquid disclosed in the present invention adopts high-quality steel plates, angle steels and other materials to form a semi-closed groove around the cable well body 5. Through the combined effect of the top cover 1, sand particles 7 and other materials, it can effectively prevent the backflow of high-temperature liquids such as molten liquid into the interior of the cable well, thereby achieving the purpose of protecting the safety of cables and related equipment.

[0025] The above description is only an application implementation mode of the present invention, but the protection scope of the present invention is not limited to this, and the scope of rights of the present invention cannot be limited thereto. Any equivalent changes made according to the technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A cable well for preventing molten liquid from flowing back, comprising a well body, characterized in that: A recessed groove is provided on the periphery of the opening at the upper end of the well body, and the groove extends circumferentially along the opening at the upper end of the well body. High-temperature resistant particles are tightly stacked in the groove. A top cover is covered on the opening at the upper end of the well body, and 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, and the bending portion is inserted into the tightly stacked high-temperature resistant particles in the groove.

2. The cable well for preventing molten liquid backflow according to claim 1 is characterized in that: The depth of the groove is not less than one third of the depth of the well body.

3. The cable well for preventing molten liquid from flowing back according to claim 1 or 2, characterized in that: A retaining ring is provided at a position corresponding to the bottom of the top cover and the upper edge of the well body. The retaining ring includes a pressing portion that is in close 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 downwardly at an angle.

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

5. The cable well for preventing molten liquid from flowing back according to claim 3 is 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 well for preventing molten liquid from flowing back according to claim 3 is characterized in that: The high temperature resistant particles tightly packed in the groove are quartz sand.

7. The cable well for preventing molten liquid backflow according to claim 3 is characterized in that: The groove is formed by continuously laying a plurality of edge protection angle steels.

8. The cable well for preventing molten liquid from flowing back according to claim 3 is characterized in that: A plurality of reinforcing ribs are arranged at the bottom of the top cover.

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