Intrinsically safe maintenance box

Abstract

The utility model relates to the technical field of power distribution equipment, in particular to an intrinsically safe maintenance box, which comprises a box body and two partition plates, the two partition plates are arranged in the box body at intervals, and the two partition plates jointly divide the internal space of the box body into a power distribution area, a single-phase maintenance power supply area and a three-phase maintenance power supply area. The power distribution area, the single-phase maintenance power supply area and the three-phase maintenance power supply area are each provided with a box door which can be opened and closed independently, only the box door on the power distribution area is provided with a door lock, a power distribution module with an exposed live part is arranged in the power distribution area, and a single-phase maintenance power supply output module with a hidden live part is arranged in the single-phase maintenance power supply area. A three-phase maintenance power supply output module with a hidden live part is arranged in the three-phase maintenance power supply area, and the power distribution module is electrically connected with the single-phase maintenance power supply output module and the three-phase maintenance power supply output module. The maintenance box can structurally prevent constructors from touching electrified parts by mistake, and intrinsic safety is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power distribution equipment technical field especially relates to an intrinsically safe maintenance box. BACKGROUND

[0002] Maintenance box is indispensable as the power distribution facility of construction, all electrical components of conventional maintenance box are arranged on the same mounting plate in the box, and in order to facilitate use, the box door of conventional maintenance box is provided with only one and is not locked, after the box door is opened, the power distribution equipment and the use socket of conventional maintenance box are directly exposed in front of the construction personnel, and there is a security risk. Therefore, in order to safety, the power distribution equipment needs to be isolated by the isolation plate according to the regulation requirement, and considering the subsequent maintenance of the power distribution equipment, the isolation plate is particularly installed in the detachable mode. But in actual construction, the maintenance personnel of maintenance box will often remove and discard the isolation plate due to convenience or habitual behavior, leading to the mis-touch of the live part of the construction personnel and the occurrence of electric shock accident.

[0003] In addition, referring to Figure 1 , the conventional maintenance box is provided with a plurality of threading holes 14 for conveniently passing in and out of the maintenance cable at the bottom position of the box, the sizes of these threading holes 14 are different, but generally are circular holes or square holes, after the maintenance cable is passed into the maintenance box, the threading holes 14 are covered by the plug-in cover plate 18, and due to the blockage of the cable itself, the plug-in cover plate 18 cannot completely cover the hole, and forcibly closing the plug-in cover plate 18 is easy to damage the cable, which is the congenital defect of the conventional maintenance box in design, causing that the box body and the outside cannot be well isolated, small animals and moisture are easy to enter the box from the threading holes, causing the short circuit of the electrical equipment in the box and the damage of the maintenance box. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the utility model provides an intrinsically safe maintenance box which can avoid the mis-touch of the live part of the construction personnel from the structure.

[0005] The utility model adopts the following technical scheme:

[0006] The utility model provides an intrinsically safe maintenance box, including the box body and the baffle, two baffles are arranged at intervals in the box body, and the two baffles jointly divide the internal space of the box body into the power distribution area, the single-phase maintenance power area and the three-phase maintenance power area, the power distribution area, the single-phase maintenance power area and the three-phase maintenance power area are respectively equipped with one separately opened and closed box door, and only the box door on the power distribution area is provided with a lock, the power distribution module with the live part exposed is arranged in the power distribution area, the single-phase maintenance power output module with the live part hidden is arranged in the single-phase maintenance power area, the three-phase maintenance power output module with the live part hidden is arranged in the three-phase maintenance power area, and the power distribution module is electrically connected with the single-phase maintenance power output module and the three-phase maintenance power output module.

[0007] Preferably, the box is a cuboid with open front and left and right sides, and the interior space of the box is sequentially divided into a three-phase maintenance power supply area, a power distribution area and a single-phase maintenance power supply area from left to right, the box doors of the three-phase maintenance power supply area and the single-phase maintenance power supply area seal the openings of the left and right sides of the box, and the box door of the power distribution area covers the entire front of the box, the installation positions of the power distribution module, the single-phase maintenance power supply output module and the three-phase maintenance power supply output module are all opposite to the box doors of the respective areas.

[0008] Preferably, the power distribution module comprises a knife-fuse switch, a main circuit breaker and a power distribution busbar, the knife-fuse switch is connected to the power distribution busbar through the main circuit breaker, and the power distribution busbar is divided into a plurality of circuits, a part of the circuits being connected to the single-phase maintenance power supply output module and another part of the circuits being connected to the three-phase maintenance power supply output module.

[0009] Preferably, the single-phase maintenance power supply output module comprises a plurality of single-phase maintenance sockets and a plurality of single-phase residual current switches, the single-phase maintenance sockets are electrically connected to the single-phase residual current switches one by one, and the plurality of circuits of the power distribution busbar connected to the single-phase maintenance power supply output module are electrically connected to the single-phase residual current switches one by one.

[0010] Preferably, the three-phase maintenance power supply output module comprises a plurality of three-phase maintenance sockets and a plurality of three-phase residual current switches, the three-phase maintenance sockets are electrically connected to the three-phase residual current switches one by one, and the plurality of circuits of the power distribution busbar connected to the three-phase maintenance power supply output module are electrically connected to the three-phase residual current switches one by one.

[0011] Preferably, a plurality of wire threading holes are formed in the bottom surface of the box, each wire threading hole is composed of a cable plug avoiding hole and a plurality of cable placing holes, the diameter of the cable plug avoiding hole is larger than the diameter of the cable placing holes, one cable plug avoiding hole is in communication with a plurality of cable placing holes at the same time, an elastic sealing assembly capable of elastically sealing the cable plug avoiding hole is arranged at the cable plug avoiding hole, and a rubber cover is arranged to seal the cable placing holes, and a cutting seam for the cable to pass through is formed on the rubber cover.

[0012] Preferably, the elastic sealing assembly comprises springs and a cover plate, the cable plug avoiding hole is a rectangular hole, the plurality of cable placing holes are in communication with the cable plug avoiding hole at one side of the cable plug avoiding hole, the cover plate can move freely parallel to the bottom surface of the box, the plurality of springs are fixed on the side of the cable plug avoiding hole opposite to the cable placing holes, and the free ends of the plurality of springs are connected to the cover plate.

[0013] Preferably, the top surface of the box is a rainproof box top.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The utility model discloses an intrinsically safe type maintenance box, which separates the internal space of the box body into three independent areas, i.e., a power distribution area, a single-phase maintenance power supply area and a three-phase maintenance power supply area, by two partitions, thereby separating the power distribution module exposed by the live part from other modules, and locking the box door of the power distribution area, so that the construction personnel can only open the box doors of the remaining two areas when using the maintenance box, and use the single-phase maintenance power supply output module or the three-phase maintenance power supply output module hidden by the live part for operation, and the power distribution area is normally locked and unlocked according to the management regulation, and the construction personnel cannot open it, which avoids the construction personnel from touching the live part by mistake from the structure and realizes intrinsic safety. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the covering state schematic view of the threading hole on the conventional maintenance box in the prior art after the maintenance cable is threaded.

[0017] Figure 2 is the front structure schematic view of the intrinsically safe type maintenance box in the utility model embodiment.

[0018] Figure 3 is the right side structure schematic view of the intrinsically safe type maintenance box in the utility model embodiment.

[0019] Figure 4 is the left side structure schematic view of the intrinsically safe type maintenance box in the utility model embodiment.

[0020] Figure 5 is the state schematic view of the cable during the threading of the cable plug on the threading hole of the intrinsically safe type maintenance box in the utility model embodiment.

[0021] Figure 6 is the covering state schematic view of the threading hole on the intrinsically safe type maintenance box in the utility model embodiment after the threading of the cable.

[0022] Among them, the sign explanation of drawing is as follows:

[0023] 1, box body 10, single-phase maintenance socket

[0024] 101, rainproof box top 11, single-phase leakage switch

[0025] 2, partition 12, three-phase maintenance socket

[0026] 3, power distribution area 13, three-phase leakage switch

[0027] 4, single-phase maintenance power supply area 14, threading hole

[0028] 5, three-phase maintenance power supply area 1401, cable plug avoiding hole

[0029] 6. Box door 1402, cable placement hole

[0030] 601, door lock 15, rubber stopper

[0031] 7. Knife fuse switch 16. Spring

[0032] 8. Main circuit breaker 17. Cover

[0033] 9. Distribution busbar 18. Plug-in cover DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integrated connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0037] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0038] See also Figures 2 to 4The embodiment provides an intrinsically safe maintenance box, which comprises a box body 1 and two partitions 2, the two partitions 2 are arranged in the box body 1 at intervals, and the two partitions 2 jointly divide the internal space of the box body 1 into a power distribution area 3, a single-phase maintenance power supply area 4 and a three-phase maintenance power supply area 5, the power distribution area 3, the single-phase maintenance power supply area 4 and the three-phase maintenance power supply area 5 are respectively provided with a box door 6 which can be opened and closed independently, and only the box door 6 on the power distribution area 3 is provided with a door lock 601, a power distribution module with an exposed live part is arranged in the power distribution area 3, a single-phase maintenance power supply output module with a hidden live part is arranged in the single-phase maintenance power supply area 4, and a three-phase maintenance power supply output module with a hidden live part is arranged in the three-phase maintenance power supply area 5, and the power distribution module is electrically connected with the single-phase maintenance power supply output module and the three-phase maintenance power supply output module.

[0039] Referring to Figures 2 to 4 The intrinsically safe maintenance box of the embodiment divides the internal space of the box body 1 into three mutually independent areas, i.e. the power distribution area 3, the single-phase maintenance power supply area 4 and the three-phase maintenance power supply area 5, through the two partitions 2, so that the power distribution module with the exposed live part is separated from other modules, and the box door 6 of the power distribution area 3 is locked, so that when the maintenance box is used by a worker, the box doors 6 of the remaining two areas can only be opened, and the single-phase maintenance power supply output module or the three-phase maintenance power supply output module with the hidden live part is used for work, and the power distribution area 3 is normally locked and unlocked according to management regulations, and the worker cannot open it, so that the worker is structurally prevented from touching the live part by mistake, the intensity of on-site power management is effectively reduced, the change from human defense to technical defense is truly realized, and intrinsic safety is achieved.

[0040] It should be noted that, in actual use, the intrinsically safe maintenance box of the embodiment can make the single-phase maintenance power supply output module and the three-phase maintenance power supply output module live by connecting an external power supply to the power distribution module, if a small-capacity maintenance power supply is needed, the electrical equipment can be directly connected to the single-phase maintenance power supply output module, and if a large-capacity maintenance power supply is needed, the electrical equipment can be directly connected to the three-phase maintenance power supply output module.

[0041] Preferably, referring to Figures 2 to 4 The box body 1 is a cuboid with openings on the front face and the left and right side faces, the internal space of the box body 1 is sequentially provided with the three-phase maintenance power supply area 5, the power distribution area 3 and the single-phase maintenance power supply area 4 from left to right, the box doors 6 of the three-phase maintenance power supply area 5 and the single-phase maintenance power supply area 4 block the openings of the left and right side faces of the box body 1, the box door 6 of the power distribution area 3 covers the entire front face of the box body 1, and the installation positions of the power distribution module, the single-phase maintenance power supply output module and the three-phase maintenance power supply output module are all opposite to the box doors 6 of the respective areas.

[0042] The intrinsically safe maintenance box has one front door and two side doors, the two side doors are the box doors 6 of the single-phase maintenance power supply area 4 and the three-phase maintenance power supply area 5 respectively, and the front door is the box door 6 of the power distribution area 3. Meanwhile, the box door 6 of the power distribution area 3 also covers the entire front of the box body 1, which is conducive to ensuring the coordination of the whole maintenance box. The installation positions of the power distribution module, the single-phase maintenance power supply output module and the three-phase maintenance power supply output module are all opposite to the box doors 6 of the respective areas, which is conducive to the quick use of the internal modules by the construction personnel after opening the box doors 6 of the corresponding areas.

[0043] Preferably, referring to Figure 2 , the power distribution module includes a knife-fuse switch 7, a main circuit breaker 8 and a power distribution busbar 9. The knife-fuse switch 7 is connected to the power distribution busbar 9 through the main circuit breaker 8. The power distribution busbar 9 branches out multiple circuits, a part of which is connected to the single-phase maintenance power supply output module and another part of which is connected to the three-phase maintenance power supply output module.

[0044] The knife-fuse switch 7 is in communication with an external power supply, and after the knife-fuse switch 7 and the main circuit breaker 8 are closed, power is supplied to the single-phase maintenance power supply output module and the three-phase maintenance power supply output module. When the power distribution module is under maintenance, the external power supply can be cut off through the knife-fuse switch 7 to avoid the risk of electric shock.

[0045] Preferably, referring to Figure 3 , the single-phase maintenance power supply output module includes multiple single-phase maintenance sockets 10 and multiple single-phase residual current switches 11. The single-phase maintenance sockets 10 are electrically connected to the single-phase residual current switches 11 one by one, and the multiple circuits of the power distribution busbar 9 connected to the single-phase maintenance power supply output module are electrically connected to the single-phase residual current switches 11 one by one.

[0046] It should be noted that the single-phase maintenance sockets 10 and the single-phase residual current switches 11 only need to maintain consistency in the number of arrangements, and the specific number of arrangements needs to be configured according to the actual situation on site.

[0047] Specifically, in this embodiment, the single-phase maintenance power supply output module is configured with a total of two single-phase maintenance sockets 10, namely CZ-1 and CZ-2, and a total of two single-phase residual current switches 11, namely KG-1 and KG-2. The CZ-1 is electrically connected to the KG-1, and the CZ-2 is electrically connected to the KG-2.

[0048] Preferably, referring to Figure 4 , the three-phase maintenance power supply output module includes multiple three-phase maintenance sockets 12 and multiple three-phase residual current switches 13. The three-phase maintenance sockets 12 are electrically connected to the three-phase residual current switches 13 one by one, and the multiple circuits of the power distribution busbar 9 connected to the three-phase maintenance power supply output module are electrically connected to the three-phase residual current switches 13 one by one.

[0049] It should be noted that the three-phase maintenance socket 12 and the three-phase leakage switch 13 only need to be consistent in the number of arrangements, and the specific number of arrangements needs to be configured according to the actual situation on site.

[0050] Specifically, in the present embodiment, the three-phase maintenance power output module is configured with two three-phase maintenance sockets 12 of CZ-I and CZ-II and two three-phase leakage switches 13 of KG-I and KG-II, and CZ-I is electrically connected with KG-I, and CZ-II is electrically connected with KG-II.

[0051] Preferably, referring to Figure 5 and Figure 6 , a plurality of wire holes 14 are formed on the bottom surface of the box body 1, each wire hole 14 is composed of a cable plug avoiding hole 1401 and a plurality of cable placing holes 1402, the hole diameter of the cable plug avoiding hole 1401 is larger than that of the cable placing hole 1402, and one cable plug avoiding hole 1401 is in communication with a plurality of cable placing holes 1402, and the cable plug avoiding hole 1401 is provided with an elastic sealing assembly capable of elastically sealing the cable plug avoiding hole 1401, and the cable placing hole 1402 is sealed with a rubber cover 15, and the rubber cover 15 is cut with a cut seam for the cable to pass in.

[0052] During the connection of the cable, referring to Figure 5 and Figure 6 , the plug of the cable is first passed into the box from the cable plug avoiding hole 1401, and then the cable on the plug is moved into the cable placing hole 1402 for storage, at this time, since the cable plug avoiding hole 1401 is no longer interfered by the elastic sealing assembly, the elastic sealing assembly will seal the cable plug avoiding hole 1401 under the action of the elastic force, and when the cable is moved into the cable placing hole 1402, it can be sleeved from the cut seam of the rubber cover 15, and the rubber cover 15 can still seal the cable placing hole 1402, thereby ensuring the sealing effect of the wire hole 14 after the cable is passed in, preventing moisture and small animals from entering the box, and improving the performance of the intrinsically safe maintenance box of the present embodiment.

[0053] Preferably, referring to Figure 5 and Figure 6 , the elastic sealing assembly includes a spring 16 and a cover plate 17, the cable plug avoiding hole 1401 is a rectangular hole, a plurality of cable placing holes 1402 are in communication with the cable plug avoiding hole 1401 at one side of the cable plug avoiding hole 1401, the cover plate 17 can move freely parallel to the bottom surface of the box body 1, a plurality of springs 16 are fixed on the side of the cable plug avoiding hole 1401 opposite to the cable placing hole 1402, and the free ends of the plurality of springs 16 are connected and fixed with the cover plate 17. Thus, the elastic sealing assembly can automatically push the cover plate 17 to completely seal the cable plug avoiding hole 1401 by the elastic force of the spring 16.

[0054] It should be noted that the above threading holes 14 are arranged at the bottom of the power distribution area 3, the single-phase maintenance power supply area 4 and the three-phase maintenance power supply area 5, and the number of the threading holes 14 in the three areas is different, and the size of the threading holes 14 in each area is matched with the cable and the cable plug in the corresponding area.

[0055] Preferably, referring to Figures 2 to 4 The top surface of the box 1 is a rainproof box top 101.

[0056] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, and these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. An intrinsically safe service box, characterized in that, The utility model provides a box (1) and baffle (2), two baffle (2) interval setting in the box (1), and two baffle (2) together divide the inside space of box (1) into distribution area (3), single -phase maintenance power area (4) and three -phase maintenance power area (5), distribution area (3), single -phase maintenance power area (4) and three -phase maintenance power area (5) are equipped with a single -phase maintenance power area (4) and three -phase maintenance power area (5) respectively, and only the box door (6) of distribution area (3) is equipped with door lock (601), distribution module with live parts is exposed in distribution area (3), single -phase maintenance power output module with live parts is hidden in single -phase maintenance power area (4), three -phase maintenance power output module with live parts is hidden in three -phase maintenance power area (5), and distribution module is connected with single -phase maintenance power output module, three -phase maintenance power output module respectively.

2. The intrinsically safe service box of claim 1, wherein, The box (1) is the cuboid modeling of front and left and right side opening, the inside space of box (1) is distribution area (3), three -phase maintenance power area (5) and single -phase maintenance power area (4) from left to right in proper order, and the box door (6) of three -phase maintenance power area (5) and single -phase maintenance power area (4) is sealed to the opening of left and right side of box (1), and the box door (6) of distribution area (3) covers the whole front of box (1), and the installation position of distribution module, single -phase maintenance power output module and three -phase maintenance power output module is opposite the box door (6) of respective area.

3. The intrinsically safe service box of claim 1, wherein, The distribution module includes knife melt switch (7), total circuit breaker (8) and distribution busbar (9), the knife melt switch (7) is connected with the distribution busbar (9) through the total circuit breaker (8), and the distribution busbar (9) is divided into multiple circuits, and a part of circuit is connected with single -phase maintenance power output module, and another part of circuit is connected with three -phase maintenance power output module.

4. The intrinsically safe service box of claim 3, wherein, The single -phase maintenance power output module includes multiple single -phase maintenance sockets (10) and multiple single -phase leakage switches (11), the single -phase maintenance socket (10) is electrically connected with the single -phase leakage switch (11) one by one, and the multiple circuits of the single -phase maintenance power output module connected with the distribution busbar (9) are electrically connected with the single -phase leakage switch (11) one by one.

5. The intrinsically safe service box of claim 3, wherein, The three -phase maintenance power output module includes multiple three -phase maintenance sockets (12) and multiple three -phase leakage switches (13), the three -phase maintenance socket (12) is electrically connected with the three -phase leakage switch (13) one by one, and the multiple circuits of the three -phase maintenance power output module connected with the distribution busbar (9) are electrically connected with the three -phase leakage switch (13) one by one.

6. The intrinsically safe service box of claim 2, wherein, The bottom surface of the box (1) is provided with a plurality of wire holes (14), each of which is composed of a cable plug avoiding hole (1401) and a plurality of cable placing holes (1402), the aperture of the cable plug avoiding hole (1401) is larger than that of the cable placing hole (1402), one cable plug avoiding hole (1401) is in communication with a plurality of cable placing holes (1402) at the same time, the cable plug avoiding hole (1401) is provided with an elastic sealing component capable of elastically sealing the cable plug avoiding hole (1401), the cable placing hole (1402) is sealed with a rubber cover (15), and the rubber cover (15) is provided with a cutting seam for the cable to pass in.

7. The intrinsically safe service box of claim 6, wherein, The elastic sealing component comprises a spring (16) and a cover plate (17), the cable plug avoiding hole (1401) is a rectangular hole, a plurality of cable placing holes (1402) are in communication with the cable plug avoiding hole (1401) at one side of the cable plug avoiding hole (1401), the cover plate (17) can freely move parallel to the bottom surface of the box (1), a plurality of springs (16) are fixed on the side of the cable plug avoiding hole (1401) opposite to the cable placing hole (1402), and the free ends of the plurality of springs (16) are connected and fixed with the cover plate (17).

8. The intrinsically safe service box of claim 2, wherein, The top surface of the box (1) is a rainproof box top (101).

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