Top waterproof structure of nuclear-grade control cabinet

Abstract

A nuclear grade control cabinet top waterproof structure comprises a cabinet body, the top of the cabinet body is provided with a rectangular hole, the peripheral hole edge of the rectangular hole is provided with an upward folding edge used for retaining water, and the upward folding edge of the periphery of the rectangular hole is provided with a rectangular annular waterproof bottom plate. The waterproof bottom plate is provided with an inner side groove with an upward opening and an outer side groove with a downward opening, a middle partition wall is arranged between the two grooves, the outer side groove of the waterproof bottom plate covers the upward folding edge of the rectangular hole, the waterproof bottom plate and the top of the cabinet body are welded and fixed, and a waterproof top cover is arranged at the upper end of the waterproof bottom plate to cover the rectangular hole. An upward protruding part is arranged in the middle of the waterproof top cover, a plurality of threading holes used for installing cable waterproof connectors are formed in the upward protruding part, and the transverse folding edges of the waterproof top cover are fixedly connected to the upper end face of the groove bottom of the outer side groove of the waterproof bottom plate through screws, so that the waterproof top cover can be replaced according to needs. And a sealing strip is arranged between the upward extending groove wall and the waterproof top cover.

Description

Technical Field

[0001] The utility model relates to the field of control cabinets, in particular to a waterproof structure at the top of a nuclear-grade control cabinet. Background Art

[0002] A control cabinet is a device that assembles switchgear, measuring instruments, protective electrical appliances, and auxiliary equipment in a closed or semi-closed metal cabinet or on a panel according to electrical wiring requirements. Compared with ordinary control cabinets, nuclear-grade control cabinets used in nuclear power plants need to meet special manufacturing requirements such as seismic category I and IP54 dust and water protection, and cable through-holes are arranged at the top of the control cabinet according to the cable routing plan of the control cabinet.

[0003] Chinese Patent CN202857166U discloses an outdoor waterproof control cabinet. A waterproof cap is provided at the top of the cabinet body of this waterproof control cabinet, and an edge connected to the cabinet body is provided at the bottom of the waterproof cap, and the edge extends out of the cabinet body. Although the top slope of this waterproof control cabinet can make water flow away, the top of this waterproof control cabinet cannot be provided with through-holes, which cannot meet the structural requirements of nuclear-grade control cabinets. Even if through-holes are provided in the waterproof control cabinet, when the number of through-holes at the top of the nuclear-grade control cabinet needs to change, the control cabinet with through-holes provided at the top of the cabinet body can only replace the entire cabinet body, resulting in waste of labor and materials and being unfavorable for reducing production costs. Summary of the Invention

[0004] The purpose of the utility model is to solve the problems existing in the prior art, and provide a waterproof structure at the top of a nuclear-grade control cabinet. Through the mutual cooperation among the cabinet body, the waterproof bottom plate, and the waterproof top cover, while meeting the strength and waterproof requirements of the nuclear-grade control cabinet, the generally designed cabinet body and the waterproof bottom plate are applicable to control cabinets with various different incoming line schemes, and the waterproof top cover is of a replaceable design. When the control cabinet is in use, the corresponding waterproof top cover can be replaced according to the cable routing plan of the control cabinet, without replacing the entire cabinet body due to the change of the cable routing plan of the control cabinet, reducing the production materials and labor costs.

[0005] The technical solution of the utility model is realized as follows:

[0006] A waterproof structure for the top of a nuclear-grade control cabinet, comprising a cabinet body. A rectangular hole is provided in the center of the top of the cabinet body. Upward-turning edges for water blocking are provided on the peripheral hole edges of the rectangular hole, and the upward-turning edges around are welded together. A rectangular-ring-shaped waterproof bottom plate is provided on the upward-turning edges around the rectangular hole. An inner groove with an upward opening and an outer groove with a downward opening are respectively provided on the waterproof bottom plate. A middle partition wall is between the inner groove and the outer groove, forming an S-shaped cross-section. The outer groove of the waterproof bottom plate covers the upward-turning edge of the rectangular hole and is welded and fixed to the top of the cabinet body through a downward-extending groove wall and the middle partition wall. A waterproof top cover is provided at the upper end of the waterproof bottom plate to cover the rectangular hole. An upward protrusion is provided in the middle of the waterproof top cover, and a plurality of wire-passing holes for installing cable waterproof connectors are provided on the upward protrusion. Horizontal turning edges for installation are provided around the waterproof top cover. The horizontal turning edges of the waterproof top cover are fixedly connected to the upper end face of the bottom of the outer groove of the waterproof bottom plate by screws, so that the waterproof top cover can be replaced as needed. The upward-extending groove wall of the inner groove of the waterproof bottom plate is located inside the upward protrusion of the waterproof top cover, and a sealing strip is provided between the upward-extending groove wall and the waterproof top cover.

[0007] The top of the cabinet body forms a top plate by bending the side plates on four sides. The top plates are welded to each other, and a central rectangular hole is left.

[0008] The cross-section of the sealing strip is an arc-shaped sealing part at the upper end and a rectangular-shaped installation part at the lower end. The rectangular-shaped installation part is provided with an elastic clamping groove with a downward opening.

[0009] The extending length of the upward-extending groove wall of the inner groove of the waterproof bottom plate is greater than the extending length of the downward-extending groove wall of the outer groove.

[0010] The welding of the downward-extending groove wall and the middle partition wall of the waterproof bottom plate to the top of the cabinet body is fixed by spot welding.

[0011] Each side of the horizontal turning edges around the waterproof top cover is fixed to the waterproof bottom plate by a plurality of screws.

[0012] The wire-passing holes are set according to the number of cables.

[0013] Four lifting rings are provided on the top of the cabinet body.

[0014] With the above solution, through the mutual cooperation of the cabinet body, the waterproof bottom plate, and the waterproof top cover, while meeting the manufacturing requirements of dust and water protection of IP54 and seismic category I for the nuclear-grade control cabinet, a generally designed cabinet body and waterproof bottom plate are adopted. When the number of incoming and outgoing cables of the nuclear-grade control cabinet changes, only the waterproof top cover needs to be replaced to adapt to different incoming and outgoing cable schemes. The waterproof top cover adopts a detachable design and can be replaced with different waterproof top covers according to different incoming and outgoing cable schemes. Especially when adding or reducing internal electrical appliances in a nuclear-grade control cabinet that has already been put into use, only the waterproof top cover needs to be replaced, and there is no need to replace the entire cabinet body. The control cabinet designed in this way can be applicable to a variety of different incoming and outgoing cable schemes, is convenient for production and manufacturing, and greatly reduces the production and use costs. Description of the Drawings

[0015] Figure 1 is a schematic structural diagram of the nuclear-grade control cabinet of the present utility model;

[0016] Figure 2 is an enlarged schematic diagram of the top structure of the cabinet body of the present utility model;

[0017] Figure 3 is a schematic structural diagram of the top of the cabinet body of the present utility model;

[0018] Figure 4 is a schematic structural diagram of the waterproof bottom plate in the present utility model;

[0019] Figure 5 is a schematic structural diagram of the waterproof top cover in the present utility model;

[0020] Figure 6 is an assembly schematic diagram of the waterproof top cover and the waterproof bottom plate. Detailed Embodiment

[0021] See Figures 1 to 6, a waterproof structure for the top of a nuclear-grade control cabinet, including a cabinet body 1. The top of the cabinet body 1 forms a top plate 13 by bending the side plates on four sides. The top plates 13 are welded to each other, and a central rectangular hole 2 is left. A upwardly turned edge 3 for water blocking is provided on the peripheral hole edges of the rectangular hole 2. The upwardly turned edges 3 around are welded together. A rectangular ring-shaped waterproof bottom plate 4 is provided on the upwardly turned edges 3 around the rectangular hole 2. An inner groove 5 with an upward opening and an outer groove 6 with a downward opening are respectively provided on the waterproof bottom plate 4. A middle partition wall 6-2 is between the inner groove 5 and the outer groove 6, forming an S-shaped cross-section. The outer groove 6 of the waterproof bottom plate 4 covers the upwardly turned edge 3 of the rectangular hole 2 and is fixedly welded to the top of the cabinet body 1 through a downward extending groove wall 6-1 and the middle partition wall 6-2. The downward extending groove wall 6-1 and the middle partition wall 6-2 of the waterproof bottom plate 4 are welded to the top of the cabinet body 1 by spot welding. Compared with full welding, spot welding can ensure that the control cabinet has higher structural strength. A waterproof top cover 10 is provided at the upper end of the waterproof bottom plate 4 to cover the rectangular hole 2. A upwardly protruding portion 12 is provided in the middle of the waterproof top cover 10. A plurality of wire passing holes 9 for installing cable waterproof joints are provided on the upwardly protruding portion 12. The wire passing holes 9 are arranged according to the number of cables. A horizontal turned edge 8 for installation is provided around the waterproof top cover 10. The horizontal turned edge 8 of the waterproof top cover 10 is fixedly connected to the upper end face of the bottom of the outer groove 6 of the waterproof bottom plate 4 by screws. Each side of the horizontal turned edge 8 around the waterproof top cover 10 is fixed to the waterproof bottom plate 4 by a plurality of screws. In this embodiment, 3 screws are used on each side. The waterproof top cover 10 can be replaced as needed. The extending length of the upward extending groove wall 5-1 of the inner groove 5 of the waterproof bottom plate 4 is greater than the extending length of the downward extending groove wall 6-1 of the outer groove 6. Therefore, the upward extending groove wall 5-1 of the inner groove 5 of the waterproof bottom plate 4 is located inside the upwardly protruding portion 12 of the waterproof top cover 10. A sealing strip 7 is provided between the upward extending groove wall 5-1 and the waterproof top cover 10. The cross-section of the sealing strip 7 is an arc-shaped sealing portion at the upper end and a rectangular-shaped installation portion at the lower end. The rectangular-shaped installation portion is provided with an elastic card slot with a downward opening. The elastic card slot facilitates the installation of the sealing strip 7 on the upward extending groove wall 5-1 of the waterproof bottom plate 4. The arc-shaped sealing portion at the upper end is squeezed between the waterproof top cover 10 and the waterproof bottom plate 4, playing a role of waterproof sealing between the two. Four lifting rings 11 are provided on the top of the cabinet body 1, facilitating the installation and fixation of the control cabinet.

[0022] During installation, place the waterproof bottom plate 4 above the top plate 13 of the cabinet body 1. Spot-weld the downward extending groove wall 6-1 of the waterproof bottom plate 4 to the top plate 13 of the cabinet body 1 and the middle partition wall 6-2 to the top plate 13 of the cabinet body 1. While meeting the requirements of the cabinet body structure strength, it achieves the waterproof effect. Install the sealing strip 7 on the upward extending groove wall 5-1 of the inner groove 5 of the waterproof bottom plate 4. The sealing strip 7 plays a waterproof and sealing role between the waterproof bottom plate 4 and the waterproof top cover 10. In addition, select the corresponding waterproof top cover 10 according to the cable entry and exit schemes of different control cabinets and install it on the waterproof bottom plate 4.

[0023] For this utility model, a cabinet body and a waterproof bottom plate with a general design are adopted. When the number of incoming and outgoing cables of the nuclear-grade control cabinet changes, only the waterproof top cover needs to be replaced to adapt to different incoming and outgoing cable schemes. On the premise of meeting the manufacturing requirements such as seismic class I and IP54 dust and waterproof of the nuclear-grade control cabinet, this utility model is applicable to a variety of different incoming and outgoing cable schemes, with convenient production and manufacturing, and greatly reduces the production and use costs.

[0024] The above are only the preferred embodiments of this utility model and are not used to limit this utility model. Any modifications made by those skilled in the art to this utility model without departing from the spirit of this utility model fall within the protection scope of this utility model.

Claims

1. A nuclear-grade control cabinet top waterproof structure, comprising a cabinet body (1), characterized in that: A rectangular hole (2) is provided in the center of the top of the cabinet (1). The edges of the rectangular hole (2) are provided with upwardly folded edges (3) for blocking water. The upwardly folded edges (3) are welded together. A rectangular ring-shaped waterproof bottom plate (4) is provided on the upwardly folded edges (3) around the rectangular hole (2). The waterproof bottom plate (4) is provided with an inner groove (5) opening upward and an outer groove (6) opening downward. An intermediate partition wall (6-2) is provided between the inner groove (5) and the outer groove (6), forming an S-shaped cross section. The outer groove (6) of the waterproof bottom plate (4) covers the upwardly folded edge (3) of the rectangular hole (2) and is welded and fixed to the top of the cabinet (1) by means of a groove wall (6-1) extending downward and an intermediate partition wall (6-2). The waterproof bottom plate (4) A waterproof top cover (10) is provided at the upper end to cover the rectangular hole (2); an upward protrusion (12) is provided in the middle of the waterproof top cover (10); a plurality of threading holes (9) for installing a cable waterproof connector are provided on the upward protrusion (12); transverse folding edges (8) for installation are provided around the waterproof top cover (10); the transverse folding edges (8) of the waterproof top cover (10) are fixedly connected to the upper end surface of the groove bottom of the outer groove (6) of the waterproof bottom plate (4) by screws, so that the waterproof top cover (10) can be replaced as needed; the upwardly extending groove wall (5-1) of the inner groove (5) of the waterproof bottom plate (4) is located in the upwardly extending groove wall (12) of the waterproof top cover (10); and a sealing strip (7) is provided between the upwardly extending groove wall (5-1) and the waterproof top cover (10).

2. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: The top of the cabinet (1) is formed by bending four side panels to form a top plate (13), and the top plates (13) are welded to each other, leaving a central rectangular hole (2).

3. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: The cross section of the sealing strip (7) is an arc-shaped sealing portion at the upper end and a rectangular mounting portion at the lower end, wherein the rectangular mounting portion is provided with an elastic slot opening downward.

4. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: The extending length of the upwardly extending groove wall (5-1) of the inner groove (5) of the waterproof bottom plate (4) is greater than the extending length of the downwardly extending groove wall (6-1) of the outer groove (6).

5. The top waterproof structure of a nuclear-grade control cabinet according to claim 1, characterized in that: The downwardly extending groove wall (6-1) and the middle partition wall (6-2) of the waterproof bottom plate (4) are fixed to the top of the cabinet body (1) by spot welding.

6. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: Each of the transverse folded edges (8) around the waterproof top cover (10) is fixed to the waterproof bottom plate (4) by a plurality of screws.

7. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: The threading holes (9) are arranged according to the number of cables.

8. A nuclear-grade control cabinet top waterproof structure as claimed in claim 1, characterized in that: Four hanging rings (11) are provided on the top of the cabinet (1).

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