Outgoing cable lap joint structure of centrally installed switchgear and centrally installed switchgear

Abstract

The embodiment of the utility model provides a centrally installed switchgear outgoing cable lap joint structure and a centrally installed switchgear, and relates to the field of centrally installed switchgears. The problem that the height from a cable connecting terminal to the bottom of a cabinet is not enough due to the arrangement of a current transformer in the centrally installed switchgear is solved. The outgoing cable lap joint structure of the centrally installed switchgear comprises a cabinet body and a sinking box, the cabinet body is provided with a bottom plate corresponding to a cable connecting terminal in position, and an opening is formed in the position, corresponding to the cable connecting terminal, of the bottom plate; the sinking box is fixed outside the cabinet body in a sealing mode corresponding to the opening and comprises a cable trench sealing plate corresponding to the opening in position, and a cable hole is formed in the cable trench sealing plate. The height space is increased by adding the sinking box at the bottom of the cabinet body, the operation space of the cable chamber is increased, and the risk of cable insulation skin cutting caused by cable vibration generated by equipment operation is eliminated.

Description

Technical Field

[0001] The utility model relates to the field of central cabinets, and in particular to a central cabinet outlet cable overlapping structure and a central cabinet. Background Art

[0002] According to the requirements of the State Grid, the cable connection terminal of the center cabinet should be no less than 700mm away from the bottom of the switch cabinet. This structural requirement limits the size of the current transformer, resulting in limitations on the transformation ratio, accuracy and capacity of the current transformer.

[0003] The transformation ratio, accuracy and capacity of the current transformer are limited, resulting in some projects that must use high-precision, large-capacity current transformers being unable to meet the requirement that the cable connection terminals of the central cabinet should be no less than 700mm from the bottom of the cabinet. The insufficient height has the following defects: insufficient height makes it inconvenient to install the cable; insufficient height causes the three-core forked cable with the outer insulation layer stripped off to vibrate after the central cabinet is in operation, and avoids friction, creating the risk of the cable insulation layer being cut. Utility Model Content

[0004] The purpose of the utility model includes, for example, providing a cable splicing structure for outgoing cables from a central cabinet, which can improve the problem that the arrangement of the current transformer in the central cabinet easily leads to an insufficient height arrangement from the cable connection terminal to the bottom of the cabinet.

[0005] The purpose of the utility model also includes providing a center cabinet, which can improve the problem that the arrangement of the current transformer in the center cabinet easily leads to insufficient height arrangement from the cable connection terminal to the bottom of the cabinet.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] An embodiment of the utility model provides a cable splicing structure for outlet cables of a central cabinet, comprising a cabinet body and a sinking box, wherein the cabinet body has a bottom plate corresponding to the position of a cable connection terminal, and the bottom plate is provided with an opening corresponding to the position of the cable connection terminal; the sinking box is sealed and fixed to the outside of the cabinet body corresponding to the opening, and the sinking box comprises a cable trench sealing plate corresponding to the opening position, and the cable trench sealing plate is provided with a cable hole.

[0008] In addition, the central cabinet outlet cable splicing structure provided by the embodiment of the utility model may also have the following additional technical features:

[0009] Optionally, the sinking box further comprises a side panel, which is connected end to end along the edge direction of the opening and is fixed between the cable trench sealing plate and the opening.

[0010] Optionally, a side of the side panel close to the opening is folded to form a curled edge, and the curled edge is fitted and fixed to the bottom plate.

[0011] Optionally, the cable connection structure for the central cabinet outlet also includes a plurality of fasteners; the bottom plate is provided with a plurality of fixing holes on the edge of the opening, and the rolled edge is provided with a plurality of fastening holes at positions corresponding to the plurality of fixing holes, and the plurality of fastening holes correspond one-to-one to the plurality of fixing holes and are fixed by the fasteners.

[0012] Optionally, the fastener is a rivet.

[0013] Optionally, the height difference between the cable connection terminal and the cable trench sealing plate is ≥700 mm.

[0014] Optionally, the height difference between the cable trench sealing plate and the bottom plate is ≥200 mm.

[0015] An embodiment of the utility model also provides a central cabinet, which includes a current transformer, a cable connection terminal and a central cabinet outlet cable connection structure; the current transformer and the cable connection terminal are fixed in the cabinet, and the current transformer is connected to the cable connection terminal.

[0016] Optionally, the central cabinet outlet cable splicing structure further includes a zero-sequence transformer, and the zero-sequence transformer is fixed in the sinking box.

[0017] Optionally, the central cabinet outlet cable connection structure further includes a cable clamp, the cable clamp is fixed in the sinking box, and the cable clamp is arranged corresponding to the cable hole.

[0018] The beneficial effects of the cable connection structure for the outlet cables of the central cabinet and the central cabinet of the embodiment of the utility model include, for example:

[0019] The cable splicing structure for outlets of a central cabinet comprises a cabinet body and a sinking box. The cabinet body comprises a bottom plate corresponding to the position of the cable connection terminal, and an opening is provided on the bottom plate corresponding to the position of the cable connection terminal. The sinking box is sealed and fixed to the outside of the cabinet body corresponding to the opening, and the sinking box comprises a cable trench sealing plate corresponding to the opening position, and the cable trench sealing plate is provided with a cable hole.

[0020] By adding a sinking box at the bottom of the cabinet to increase the height space from the cable connection terminal to the cable hole, the operating space of the cable room is increased, which is convenient for construction and maintenance personnel to install cable joints; and the risk of cable insulation being cut due to cable vibration generated by equipment operation is eliminated.

[0021] The center cabinet, including the above-mentioned center cabinet outgoing cable splicing structure, can improve the problem that the arrangement of the current transformer in the center cabinet easily leads to insufficient height arrangement from the cable connection terminal to the bottom of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the cable connection structure for the outgoing cables of the central cabinet provided in this embodiment from a side view;

[0024] Figure 2 This is a schematic diagram of the internal structure of the central cabinet outlet cable splicing structure provided in this embodiment from a main viewing angle.

[0025] Icons: 100-center cabinet; 110-current transformer; 120-cable connection terminal; 130-zero sequence transformer; 140-cable clamp; 200-cabinet; 210-bottom plate; 220-opening; 300-sinking box; 310-cable trench sealing plate; 320-cable hole; 330-side panel; 340-curling; 350-insulation plugging; 400-cable trench. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0030] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0031] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0032] Combine the following Figure 1 and Figure 2 The cable splicing structure for the outgoing cables of the central cabinet provided in this embodiment is described in detail.

[0033] Please refer to Figure 1 and Figure 2 An embodiment of the utility model provides a cable splicing structure for outlet cables of a central cabinet, including a cabinet body 200 and a sinking box 300. The cabinet body 200 has a bottom plate 210 corresponding to the position of a cable connection terminal 120, and an opening 220 is provided on the bottom plate 210 corresponding to the position of the cable connection terminal 120; the sinking box 300 is sealed and fixed to the outside of the cabinet body 200 corresponding to the opening 220, and the sinking box 300 includes a cable trench sealing plate 310 corresponding to the position of the opening 220, and the cable trench sealing plate 310 is provided with a cable hole 320.

[0034] by Figure 2 The relative positions in the figure are introduced as follows: the current transformer 110, the cable connection terminal 120, the base plate 210 and the sinking box 300 are arranged in sequence from top to bottom, the sinking box 300 is fixed below the opening 220, and the cable trench sealing plate 310 is correspondingly arranged below the opening 220.

[0035] A sinking box 300 is added below the opening 220, and the cable hole 320 is moved down to be opened on the cable trench sealing plate 310 of the sinking box 300. This can increase the height space from the cable connection terminal 120 to the cable hole 320. In this way, even if a large-capacity current transformer 110 is installed, sufficient cable installation space can be left between the cable connection terminal 120 and the cable hole 320, which can prevent the insulation layer on the outside of the cable from being stripped off and causing friction and vibration, thereby avoiding the risk of being cut.

[0036] During the construction, a cable trench 400 is excavated at the bottom of the cabinet 200 , and the sinking box 300 is placed in the cable trench 400 . The primary cable passes from the cable trench 400 through the cable hole 320 of the cable trench sealing plate 310 and into the sinking box 300 .

[0037] Specifically, refer to Figure 2 The cable connection structure of the central cabinet outlet also includes an insulating plug 350, and the insulating plug 350 is fixed on the cable hole 320. The insulating plug 350 is a tower-shaped sheath structure.

[0038] Reference Figure 2 In this embodiment, the sinking box 300 further includes a side panel 330, which is connected end to end around the edge direction of the opening 220 and fixed between the cable trench sealing plate 310 and the opening 220. The side panels 330 are connected end to end to form a hollow space, one end of the side panel 330 is fixed to the bottom plate 210, and the other end of the side panel 330 is fixed to the cable trench sealing plate 310.

[0039] by Figure 2 The relative positions in the figure are introduced, and the side panels 330 are arranged vertically. Specifically, there are four side panels 330, and the four side panels 330 are connected end to end to form a square space. The top ends of the four side panels 330 are fixed to the bottom plate 210, and the bottom ends of the four side panels 330 are fixed to the cable trench sealing plate 310. The sinking box 300 is a square box, and the cable trench sealing plate 310 is also square. The height of the side panels 330 is also the height of the cable trench sealing plate 310 sinking, that is, the height of the cable hole 320 sinking. By controlling the height of the side panels 330, the height between the cable connection terminal 120 and the cable hole 320 can be controlled.

[0040] Reference Figure 2 In this embodiment, the side panel 330 is folded at one side close to the opening 220 to form a curling edge 340, and the curling edge 340 is fixedly attached to the bottom plate 210. The curling edge 340 is fixed to the bottom plate 210, which facilitates installation.

[0041] When the sinking box 300 is a square box, the top of each side panel 330 is folded to form a curling edge 340, and each curling edge 340 is attached and fixed to the bottom plate 210 to achieve a firm fixation of the sinking box 300.

[0042] Reference Figure 2 In this embodiment, the cable connection structure of the central cabinet also includes multiple fasteners; the bottom plate 210 is provided with multiple fixing holes at the edge of the opening 220, and the curling edge 340 is provided with multiple fastening holes at the positions corresponding to the multiple fixing holes, and the multiple fastening holes correspond to the multiple fixing holes one by one and are fixed by fasteners.

[0043] A plurality of fixing holes are arranged at intervals along the edge of the opening 220 , and a plurality of fastening holes are arranged at intervals along the length direction of the curling edge 340 . Each fastening hole is fixed by a fastener after corresponding to a fixing hole.

[0044] Reference Figure 2 In this embodiment, the fastener is a rivet. In other embodiments, the fastener can be a bolt.

[0045] Reference Figure 2 In this embodiment, the height difference between the cable connection terminal 120 and the cable trench sealing plate 310 is ≥700 mm. A height space of ≥700 mm is reserved between the cable connection terminal 120 and the cable trench sealing plate 310, which is convenient for cable installation. In addition, after the central cabinet 100 is in operation, the vibration of the three-core bifurcated cable with the outer insulation layer of the cable stripped off will not generate friction, thereby avoiding the risk of cutting the cable insulation layer.

[0046] Reference Figure 2 In this embodiment, the height difference between the cable trench sealing plate 310 and the bottom plate 210 is ≥200 mm. Combined with the side panels 330 described above, that is, the height of the side panels 330 is set to be ≥200 mm, so that the height difference between the cable hole 320 and the cable connection terminal 120 can be greater than 700 mm.

[0047] According to a central cabinet outlet cable splicing structure provided in this embodiment, the working principle of the central cabinet outlet cable splicing structure is: by adding a sinking box 300 at the bottom of the cabinet 200 to increase the height space, the sinking height of the sinking box 300 is ≥200mm, the cable trench sealing plate 310 and the zero-sequence transformer 130 are sunken, and the position of the observation window is adjusted according to the specific position to meet the visual requirements of the cable connection.

[0048] The cable splicing structure for outgoing cables from a central cabinet provided in this embodiment has at least the following advantages:

[0049] A sinking box 300 is added to the bottom of the cabinet 200 to increase the height space between the cable connection terminal 120 and the cable hole 320. The size of the current transformer 110 can be increased to exceed 205*435mm, thereby increasing the operating space in the cable room and facilitating the installation of cable joints by construction and maintenance personnel. The risk of cable insulation being cut due to cable vibration generated by equipment operation is eliminated, and the application scenarios of the central cabinet 100 are also more extensive.

[0050] The cable trench sealing plate 310 and the zero sequence mutual inductor 130 are sunk into the sinking box 300 to meet the cable installation requirements. The position of the observation window is adjusted according to the specific position to meet the visual requirements of the cable connection.

[0051] Reference Figure 1 and Figure 2The embodiment of the utility model further provides a central cabinet 100, which includes a current transformer 110, a cable connection terminal 120 and a central cabinet outlet cable connection structure; the current transformer 110 and the cable connection terminal 120 are fixed in the cabinet body 200, and the current transformer 110 is connected to the cable connection terminal 120. Figure 2 The relative positions in the figure are introduced as follows: the current transformer 110 is fixed on the left side of the cable connection terminal 120, a sinking box 300 is arranged under the bottom plate 210, and the distance between the cable connection terminal 120 and the cable trench sealing plate 310 is greater than 700 mm. The setting of the current transformer 110 in the central cabinet 100 is improved, which easily leads to the problem that the height from the cable connection terminal 120 to the bottom of the cabinet is not set enough.

[0052] Reference Figure 2 In this embodiment, the cable connection structure of the central cabinet outlet also includes a zero-sequence transformer 130, which is fixed in the sinking box 300. The zero-sequence transformer 130 is sunk and fixed in the sinking box 300, which can increase the space between the zero-sequence transformer 130 and the cable connection terminal 120, and facilitate the cable installation.

[0053] Reference Figure 2 In this embodiment, the cable connection structure of the central cabinet outlet also includes a cable clamp 140, which is fixed in the sinking box and arranged corresponding to the cable hole 320. The cable clamp 140 is used to pass the installation cable, and the cable clamp 140 is fixed in the sinking box 300 to facilitate the installation of the cable.

[0054] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A cable splicing structure for outgoing cables from a central cabinet, characterized in that: The invention comprises a cabinet (200) and a sinking box (300), wherein the cabinet (200) has a bottom plate (210) corresponding to the position of a cable connection terminal (120), and the bottom plate (210) is provided with an opening (220) at a position corresponding to the cable connection terminal (120); the sinking box (300) is sealed and fixed to the outside of the cabinet (200) corresponding to the opening (220), and the sinking box (300) comprises a cable trench sealing plate (310) corresponding to the position of the opening (220), and the cable trench sealing plate (310) is provided with a cable hole (320).

2. The cable splicing structure for the outlet of the central cabinet according to claim 1 is characterized in that: The sinking box (300) further comprises a side panel (330), which is connected end to end around the edge direction of the opening (220) and is fixed between the cable trench sealing plate (310) and the opening (220).

3. The cable connection structure for the central cabinet outlet according to claim 2 is characterized in that: One side of the side panel (330) close to the opening (220) is folded to form a curling edge (340), and the curling edge (340) is fitted and fixed to the bottom panel (210).

4. The cable splicing structure for the outlet of the central cabinet according to claim 3 is characterized in that: The central cabinet outlet cable connection structure also includes a plurality of fasteners; the bottom plate (210) is provided with a plurality of fixing holes at the edge of the opening (220); the rolled edge (340) is provided with a plurality of fastening holes at positions corresponding to the plurality of fixing holes; the plurality of fastening holes correspond to the plurality of fixing holes one by one and are fixed by the fasteners.

5. The cable splicing structure for outlets of the central cabinet according to claim 4 is characterized in that: The fastener is a rivet.

6. The cable splicing structure for outlets from a central cabinet according to any one of claims 1 to 5, characterized in that: The height difference between the cable connection terminal (120) and the cable trench sealing plate (310) is ≥700 mm.

7. The cable splicing structure for the outlet of the central cabinet according to claim 6 is characterized in that: The height difference between the cable trench sealing plate (310) and the bottom plate (210) is ≥200 mm.

8. A central cabinet (100), characterized in that: The central cabinet (100) comprises a current transformer (110), a cable connection terminal (120) and a central cabinet outgoing cable connection structure according to any one of claims 1 to 7; the current transformer (110) and the cable connection terminal (120) are fixed in the cabinet body (200), and the current transformer (110) is connected to the cable connection terminal (120).

9. The central cabinet (100) according to claim 8, characterized in that: The central cabinet (100) further comprises a zero-sequence mutual inductor (130), and the zero-sequence mutual inductor (130) is fixed in the sinking box (300).

10. The central cabinet (100) according to claim 8, characterized in that: The central cabinet (100) further comprises a cable clamp (140), wherein the cable clamp (140) is fixed in the lower sinking box, and the cable clamp (140) is arranged corresponding to the cable hole (320).

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