Maintenance power box

Abstract

The invention discloses a maintenance power box which comprises an outer shell, a binding post, a cover plate and an adjusting switch and further comprises an external power-off structure, an air switch is arranged in the outer shell and opened and closed through a handle, a through opening is formed in one end of the outer shell, and the external power-off structure comprises a mounting base embedded in the through opening. A swing cylinder is arranged on the inner side of the mounting seat, a movable clamp is arranged on the side, close to the outer shell, of the swing cylinder, the movable clamp is clamped on the outer side of the handle, and a linkage rod is arranged on the side, away from the outer shell, of the swing cylinder; the inner side wall of the outer shell is further provided with a plurality of wire grooves, the wire grooves are arranged at intervals, the inner expansion structure comprises a stacking frame arranged in the wire grooves, an elastic piece is arranged in the stacking frame, a locking plate is connected to the elastic piece, and an electric appliance element is locked to the locking plate. The strength of the whole box body can be improved on the premise that the thickness of the shell is not increased, and the safety is higher.

Description

Technical Field

[0001] The invention relates to an electric equipment, in particular to a maintenance power box. Background Art

[0002] The maintenance power box is equipped with a main power switch, branch power switches, air switches, terminals, and small circuit breakers. It is an intermediate maintenance equipment that connects the external power supply and the power box to the electrical components to be repaired. It has a simple structure, low cost, high safety, and can meet various power needs at the power maintenance site. It is widely used in various electrical systems.

[0003] The maintenance power box is mostly used for on-site maintenance, and workers operate on-site. However, there is a safety hazard of electric shock when operating the maintenance power box. In addition, the overall box body is too thin, the equipment is crowded, and there are many exposed live parts, which makes the operation more difficult. Some existing maintenance power boxes directly make the shell of the maintenance power box into an explosion-proof shell to improve the strength of the entire shell. However, if the wall thickness is increased at the same volume, the installation space of the internal electrical components is directly compressed. If the volume is increased, the volume of the entire power box is directly expanded, which affects the overall portability. In addition, the thickened metal cannot improve the overall safety, and electric shock will still occur at the leakage point.

[0004] Therefore, this case aims to provide a maintenance power box that can cut off the power with one click when the worker is about to retract the maintenance power box, and improve the strength of the entire box without increasing the thickness of the shell, and allow enough space inside the box to lay cables, thereby greatly improving the safety of the maintenance power box. Summary of the invention

[0005] The present invention provides a maintenance power box, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A maintenance power box, comprising an outer shell for mounting electrical components, the top surface of the outer shell is open, a plurality of terminal posts are provided on the side of the outer shell, a cover plate is provided on the top surface of the outer shell, the side of the cover plate is hinged to the outer shell through a hinge, a handle is provided on the cover plate, and a plurality of adjustment switches are provided on the cover plate, characterized in that the maintenance power box also includes:

[0008] An external power-off structure, wherein an air switch is arranged inside the outer shell, and the air switch is opened and closed by a handle, and a through hole is provided at one end of the outer shell, and the external power-off structure comprises a mounting seat embedded in the through hole, and a swing cylinder is arranged on the inner side of the mounting seat, and a movable clamp is arranged on the side of the swing cylinder close to the outer shell, and the movable clamp is clamped on the outer side of the handle, and a linkage rod is arranged on the side of the swing cylinder away from the outer shell, when the maintenance power box needs to be powered off, the linkage rod is rotated to make the linkage rod drive the swing cylinder to swing, so that the movable clamp drives the handle to rotate, so that the air switch is powered off;

[0009] The inner expansion structure is characterized in that a plurality of wire grooves are also arranged on the inner side wall of the outer shell, and the wire grooves are arranged at intervals. The inner expansion structure includes a stacking frame arranged in the wire groove intervals, and an elastic member is arranged in the stacking frame. A locking plate is connected to the elastic member, and an electrical component is locked on the locking plate. After the wires are laid inside the wire groove, the elastic member is compressed on the side of the locking plate where the electrical component is not installed and locked to the stacking frame.

[0010] As a further improvement, the mounting seat includes a connecting ring embedded in the through-opening position, the connecting ring is connected to an inner guide cylinder on the side close to the outer shell, and is connected to an outer guide cylinder on the side away from the outer shell, the length of the outer guide cylinder is smaller than that of the inner guide cylinder, and the swing cylinder passes through the outer guide cylinder, the connecting ring, and the inner guide cylinder.

[0011] As a further improvement, the inner guide cylinder is located within the projection range of the outer edge of the cover plate.

[0012] As a further improvement, a plurality of guide ribs are fixed on the inner side of the connecting ring, a convex rib is provided on the inner side of the guide rib, a plurality of rib grooves are provided on the outer side of the swing cylinder, and a groove is provided in the middle section of the rib groove, so that the swing cylinder can rotate along the connecting ring and slide back and forth along the connecting ring at the same time.

[0013] As a further improvement, the movable clamp includes a connecting arm axially connected to the swing cylinder, a U-shaped clamping handle is connected to the connecting arm, the opening of the U-shaped clamping handle is adapted to the handle of the air switch, and a soft pad is provided on the inner side of the U-shaped clamping handle.

[0014] As a further improvement, heat-transmitting holes are provided on the side of the soft pad facing the handle and on both sides of the soft pad.

[0015] As a further improvement, the stacking frame includes a plurality of stacked sheets arranged in the intervals between the wire grooves, the height of the stacked sheets is higher than the wire grooves, and both sides of all the stacked sheets are locked and fixed by a series connection plate.

[0016] As a further improvement, the elastic member comprises a plurality of spring seats arranged on the outer side of the laminate, and a plurality of springs higher than the laminate are arranged on the spring seats, and the top ends of the springs are connected to the locking plate.

[0017] As a further improvement, the locking plate includes a support plate for installing components, the back of the support plate is provided with guide ribs corresponding to the number of stacking sheets, a plurality of threaded holes are provided on the support plate, and the support plate is locked to the stacking sheets and the serial connection plate through the threaded holes, and a plurality of through grooves are also provided on the support plate, and the through grooves are used to make way for cables in the wire trough.

[0018] The beneficial effects of the present invention are:

[0019] In order to improve convenience and maneuverability, the shell of the existing maintenance power box is usually very thin, which sacrifices the shell strength of the maintenance power box. Therefore, many explosion-proof maintenance power boxes have appeared on the market. Most of the explosion-proof maintenance power boxes use thicker explosion-proof shells to improve strength, and the thick shell directly reduces the layout space in the box. Therefore, the present invention can also set a locking plate on the wire trough after the conventional wire trough wiring through the additional internal expansion structure. First, the connection and closing relationship between the locking plate and the stacking frame is unlocked, and the locking plate is allowed to droop naturally through the elastic member. The wiring is first carried out in the wire trough. When the wire trough is finished, the locking plate is locked to the stacking frame, so that wiring can be done again or electrical components can be installed on the locking plate, thereby achieving the effect of double-layer wiring, and the utilization rate of the entire space is higher. At the same time, the stacking frame with a raised cushion can directly increase the side wall strength of the outer shell, thereby improving the strength of the entire maintenance power box, without occupying the use space of the entire box, and without increasing the thickness, the corresponding protection effect can also be achieved.

[0020] When setting up the stacking frame, if it is set in the wire trough, it will directly hinder the arrangement of the cables and occupy the original space of the cables. Therefore, the present invention sets the stacking sheets of the stacking frame in the intervals between the wire troughs to avoid the wire troughs and makes the height of the stacking sheets higher than the wire troughs, so that the setting of the stacking sheets does not affect the arrangement of the cables in the wire troughs, thereby achieving the effect of having installation space on both planes, thereby improving the space utilization rate inside the maintenance power box.

[0021] During the wiring process of the wire trough, it is necessary to form a connection with the electrical components arranged on the locking plate. Therefore, if the locking plate is separated from the entire structure at this time, a person is required to assist in the installation. Therefore, the present invention provides an elastic member on the basis of the stacking frame and the locking plate. Through the design of the spring seat and the spring, the locking plate can be linked to avoid its direct split setting without connection. In addition, the connection of the spring can also play a certain temporary connection role when the locking plate and the partial connection nodes of the stacking frame are separated, thereby improving the practical effect of the present invention.

[0022] When installing the locking plate, since there are multiple stacking sheets, in order to improve the coordination between the locking plate and the stacking sheets, guide ribs corresponding to the number of stacking sheets are provided on the back of the locking plate to clamp the stacking sheets, and then the support plate is locked to the stacking sheets and the series connection plate, thereby overcoming the repulsive force of the spring on the support plate and balancing the entire internal expansion structure.

[0023] Although the strength is not reduced after the shell is made thinner, the overall leakage problem cannot be solved. Once leakage occurs, the shell will be directly charged, which makes it unsafe for personnel to operate when the maintenance is completed. Therefore, the present invention sets an external power-off structure. When the power needs to be turned off after the maintenance is completed, there is no need to open the cover. It is only necessary to rotate the linkage rod to drive the swing cylinder to rotate, so that the swing cylinder drives the movable clamp to rotate, and the movable clamp drives the handle to rotate, so that the air switch is directly turned off and the power is cut off. At this time, the staff opens the cover again and disconnects the corresponding terminal, so as to safely disconnect the maintenance power box from the power cabinet or electrical equipment.

[0024] When setting up an external power-off structure, in order to avoid electric shock, the structure needs to be mechanical and insulating, so that the staff does not need to touch the outer shell and the cover plate when they need to cut off the power with one button. Therefore, the mounting seat of the present invention is divided into inner and outer connecting parts, and the guidance of the outer guide cylinder, the connecting ring, and the inner guide cylinder is used to guide the swing cylinder, so that the swing cylinder can be kept within a fixed range regardless of whether it is rotating or shrinking and expanding.

[0025] In the process of cooperating with the swing cylinder, the connecting ring needs to realize not only forward and backward movement but also circumferential rotation. Therefore, the present invention arranges guide ribs and convex ribs on the connecting ring, and arranges rib grooves, grooves and guide ribs and convex ribs in the swing cylinder to cooperate with each other, so as to realize the rotation of the rib grooves and guide ribs and the lateral movement of the convex ribs and grooves, and realize the position change in two dimensions, so as to achieve the effect of opening and closing the air switch, and retract into the outer edge of the cover plate, so as to facilitate the transportation of the entire box.

[0026] In order to better match the movable clamp with the handle, a U-shaped clamping handle that matches the shape of the handle is provided at the end position of the movable clamp of the present embodiment. The U-shaped clamping handle itself is made of plastic and can be insulated. The soft pad inside the U-shaped clamping handle is made of rubber and can also play an insulating role. Even if there is a leakage, it will not be transmitted to the linkage rod, and the rotation angle of the U-shaped clamping handle is consistent with the rotation angle of the handle, so that the handle will only rotate when the U-shaped clamping handle rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0030] Figure 3 The present invention Figure 3 Cross-section view at AA in the middle.

[0031] Figure 4 It is a schematic diagram of the structure of the present invention after the cover plate is peeled off (electrical components have not yet been assembled).

[0032] Figure 5 It is a structural schematic diagram of the mounting seat of the present invention.

[0033] Figure 6 It is a structural schematic diagram of the external power-off structure of the present invention.

[0034] Figure 7 It is a structural schematic diagram of the expanded structure in the present invention.

[0035] Figure 8 It is a schematic diagram of the structure of the expansion structure of the present invention (with the locking plate removed).

[0036] In the figure:

[0037] Outer shell 10, wire groove 11, terminal 20, cover plate 30, regulating switch 40, external power-off structure 50, mounting seat 51, connecting ring 511, guide rib 5111, convex rib 5112, inner guide cylinder 512, outer guide cylinder 513, swing cylinder 52, rib groove 521, groove 522, movable clamp 53, connecting arm, U-shaped clamping handle 532, cushion 533, linkage rod 54, inner expansion structure 60, stacking frame 61, stacking plate 611, series connection plate 612, elastic member 62, spring seat 621, spring 622, locking plate 63, support plate 631, guide rib 632. DETAILED DESCRIPTION

[0038] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. 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 invention claimed for protection, but merely represents the 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 belong to the scope of protection of the present invention.

[0039] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] Reference Figures 1 to 8As shown, a maintenance power box comprises an outer shell 10 for installing electrical components, the top surface of the outer shell 10 is open, and a plurality of terminal posts 20 are provided on the side of the outer shell 10, a cover plate 30 is provided on the top surface of the outer shell 10, and the side of the cover plate 30 is hinged to the outer shell 10 by a hinge, a handle is provided on the cover plate 30, and a plurality of adjustment switches 40 are provided on the cover plate 30, and the maintenance power box also includes: an external power-off structure 50, an air switch is provided inside the outer shell 10, and the air switch is opened and closed by a handle, and a through opening is provided at one end of the outer shell 10, and the external power-off structure 50 comprises a mounting seat 51 embedded in the through opening position, a swing cylinder 52 is provided on the inner side of the mounting seat 51, and a movable clamp 53 is provided on the side of the swing cylinder 52 close to the outer shell 10, and the movable The movable clamp 53 is clamped on the outside of the handle, and a linkage rod 54 is provided on the side of the swing cylinder 52 away from the outer shell 10. When the power box needs to be powered off for maintenance, the linkage rod 54 is rotated to allow the linkage rod 54 to drive the swing cylinder 52 to swing, so that the movable clamp 53 drives the handle to rotate, so that the air switch is powered off; the inner expansion structure 60, the inner side wall of the outer shell 10 is also provided with a plurality of wire grooves 11, and the wire grooves 11 are arranged at intervals. The inner expansion structure 60 includes a stacking frame 61 arranged in the intervals of the wire grooves 11, and an elastic member 62 is provided in the stacking frame 61. A locking plate 63 is connected to the elastic member 62, and an electrical component is locked to the locking plate 63. After the wire groove 11 is wired, the side of the locking plate 63 where the electrical component is not installed is compressed with the elastic member 62 and locked to the stacking frame 61.

[0041] In this embodiment, it is necessary to set up the necessary air switches, circuit breakers, cables and other structures in the maintenance power box. Therefore, in the early wiring stage, it is necessary to consider the leakage problem that may occur later.

[0042] For the convenience and mobility of the existing maintenance power box, the shell is usually very thin, sacrificing the shell strength of the maintenance power box. Therefore, many explosion-proof maintenance power boxes have appeared on the market. Most of the explosion-proof maintenance power boxes use thicker explosion-proof shells to improve the strength, and the thick shell directly reduces the layout space in the box. Therefore, the present invention can set a locking plate 63 on the wire trough 11 after the conventional wire trough 11 is wired by adding an internal expansion structure 60. First, the connection and closing relationship between the locking plate 63 and the stacking frame 61 is unlocked. , let the locking plate 63 droop naturally through the elastic member 62, and wire the wires in the wire trough 11 first. When the wire trough 11 is finished wiring, the locking plate 63 is locked to the stacking frame 61, so that wiring can be done again or electrical components can be installed on the locking plate 63, thereby achieving the effect of double-layer wiring, and the utilization rate of the entire space is higher. At the same time, the raised stacking frame 61 can directly increase the side wall strength of the outer shell 10, thereby improving the strength of the entire maintenance power box, without occupying the use space of the entire box body, and without increasing the thickness, it can also achieve the corresponding protection effect.

[0043] When setting the stacking frame 61, if it is set in the wire trough 11, it will directly hinder the arrangement of the cables and occupy the original space of the cables. Therefore, the stacking frame 61 of this embodiment includes a plurality of stacking sheets 611 arranged in the intervals of the wire troughs 11, and the height of the stacking sheets 611 is higher than the wire troughs 11. Both sides of all the stacking sheets 611 are locked and fixed by a series plate 612. By setting the stacking frame 611 in the intervals between the wire troughs 11, avoiding the wire troughs 11, and making the height of the stacking sheets 611 higher than the wire troughs 11, the setting of the stacking sheets 611 does not affect the arrangement of the cables in the wire troughs 11, thereby achieving the effect of having installation space on both planes, thereby improving the space utilization rate inside the power box for maintenance.

[0044] During the wiring process of the wire trough 11, it needs to form a connection with the electrical components arranged on the locking plate 63. Therefore, if the locking plate 63 is separated from the entire structure at this time, a person is required to assist in the installation. Therefore, the elastic member 62 of this embodiment includes a plurality of spring seats 621 arranged on the outer side of the stack 611, and a plurality of springs 622 higher than the stack 611 are arranged on the spring seat 621. The top of the spring 622 is connected to the locking plate 63. On the basis of the stacking frame 61 and the locking plate 63, an elastic member 62 is arranged. Through the design of the spring seat 621 and the spring 622, the locking plate 63 can be linked to avoid its direct split setting without connection. In addition, the connection of the spring 622 can also play a certain temporary linking role when the locking plate 63 and the partial connection nodes of the stacking frame 61 are separated, thereby improving the practical effect of the present invention.

[0045] When installing the locking plate 63, since there are multiple stacking sheets 611, in order to improve the matching effect between the locking plate 63 and the stacking sheets 611, the locking plate 63 includes a support plate 631 for installing components, and the back of the support plate 631 is provided with guide ribs 632 corresponding to the number of stacking sheets 611, and a plurality of threaded holes are provided on the support plate 631, through which the support plate 631 is locked to the stacking sheets 611 and the series-connecting plate 612, and a plurality of through grooves are also provided on the support plate 631, and the through grooves are used to make way for the cables in the wire trough 11, so that the guide ribs 632 corresponding to the number of stacking sheets 611 are provided on the back of the locking plate 63 to clamp the stacking sheets 611, and then the support plate 631 is locked to the stacking sheets 611 and the series-connecting plate 612, so as to overcome the repulsive force of the spring 622 on the support plate 631 and balance the entire inner expansion structure 60.

[0046] Although the strength is not reduced after the shell is made thinner, the overall leakage problem cannot be solved. Once leakage occurs, the shell will be charged directly, which makes it unsafe for personnel to operate when the maintenance is completed. Therefore, the present invention sets an external power-off structure 50. When the power needs to be turned off after the maintenance is completed, there is no need to open the cover 30. It is only necessary to rotate the linkage rod 54 to allow the linkage rod 54 to drive the swing cylinder 52 to rotate, so that the swing cylinder 52 drives the movable clamp 53 to rotate, and the movable clamp 53 drives the handle to rotate, so that the air switch is directly turned off and the power is cut off. At this time, the staff will open the cover 30 again and disconnect the corresponding terminal 20, so as to safely disconnect the maintenance power box from the power cabinet or electrical equipment.

[0047] When setting up the external power-off structure 50, in order to avoid electric shock, the structure needs to be mechanical and insulating, so that the staff does not need to touch the outer shell 10 and the cover plate 30 when they need to cut off the power with one button. Therefore, the mounting seat 51 of this embodiment includes a connecting ring 511 embedded in the through-port position, and the side of the connecting ring 511 close to the outer shell 10 is connected to the inner guide cylinder 512, and the side of the connecting ring 511 away from the outer shell 10 is connected to the outer guide cylinder 513, and the length of the outer guide cylinder 513 is smaller than the inner guide cylinder 512. The swing cylinder 52 passes through the outer guide cylinder 513, the connecting ring 511, and the inner guide cylinder 512. The mounting seat 51 is divided into inner and outer connecting parts, and the guidance of the outer guide cylinder 513, the connecting ring 511, and the inner guide cylinder 512 is used to guide the swing cylinder 52, so that the swing cylinder 52 can be kept within a fixed range whether it is rotating or shrinking and expanding.

[0048] In order to avoid expanding the lateral area of ​​the entire box after the inner guide cylinder 512 is set, the inner guide cylinder 512 is located within the projection range of the outer edge of the cover plate 30, and the swing cylinder 52 is also located within the projection range of the outer edge of the cover plate 30 after being retracted into the inner guide cylinder 512.

[0049] In the process of cooperating with the swing cylinder 52, the connecting ring 511 needs to realize not only forward and backward movement but also circumferential rotation. Therefore, a plurality of guide ribs 5111 are fixed to the inner side of the connecting ring 511 of the present embodiment, and a convex rib 5112 is provided on the inner side of the guide rib 5111. A plurality of rib grooves 521 are provided on the outer side of the swing cylinder 52, and a groove 522 is provided in the middle section of the rib groove 521, so that the swing cylinder 52 can rotate along the connecting ring 511 and move along the connecting ring 512 at the same time. 1 slides forward and backward, by arranging guide ribs 5111 and convex ribs 5112 on the connecting ring 511, and arranging rib grooves 521 and concave grooves 522 in the swing cylinder 52 to cooperate with the guide ribs 5111 and the convex ribs 5112, so as to realize the turnover of the rib grooves 521 and the guide ribs 5111 and the lateral movement of the convex ribs 5112 and the concave grooves 522, and realize the position change in two dimensions, so as to achieve the effect of opening and closing the air switch, and retract into the outer edge of the cover plate 30, so as to facilitate the transportation of the whole box.

[0050] In order to better match the movable clamp 53 with the handle, the movable clamp 53 of this embodiment includes a connecting arm axially connected to the swing cylinder 52, and a U-shaped clamping handle 532 is connected to the connecting arm. The opening of the U-shaped clamping handle 532 is adapted to the handle of the air switch, and a soft pad 533 is provided on the inner side of the U-shaped clamping handle 532. The end position of the movable clamp 53 is provided with a U-shaped clamping handle 532 adapted to the shape of the handle. The U-shaped clamping handle 532 itself is made of plastic and can be insulated, and the soft pad 533 in the U-shaped clamping handle 532 is made of rubber, which can also play an insulating effect. Even if there is a leakage, it will not be transmitted to the linkage rod 54, and the turnover angle of the U-shaped clamping handle 532 is consistent with the rotation angle of the handle, so that the handle will be driven to rotate only when the U-shaped clamping handle 532 rotates.

[0051] The air switch will generate heat when in use. In order to prevent the soft pad 533 from affecting the heat dissipation effect of the handle after it is matched with the handle, heat-transmitting holes are provided on the side of the soft pad 533 facing the handle and on both sides of the soft pad 533, so that heat dissipation at the handle position can be achieved, and the setting of the movable clip 53 does not affect the normal use of the air switch.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A maintenance power box, comprising an outer shell (10) for mounting electrical components, the top surface of the outer shell (10) is open, a plurality of terminal posts (20) are provided on the side of the outer shell (10), a cover plate (30) is provided on the top surface of the outer shell (10), the side of the cover plate (30) is hinged to the outer shell (10) through a hinge, a handle is provided on the cover plate (30), and a plurality of adjustment switches (40) are provided on the cover plate (30), characterized in that: The maintenance power box also includes: An external power-off structure (50), wherein an air switch is arranged inside the outer shell (10), and the air switch is opened and closed by a handle. A through hole is provided at one end of the outer shell (10), and the external power-off structure (50) comprises a mounting seat (51) embedded in the through hole, and a swing cylinder (52) is arranged on the inner side of the mounting seat (51), and a movable clamp (53) is arranged on the side of the swing cylinder (52) close to the outer shell (10), and the movable clamp (53) is clamped on the outer side of the handle, and a linkage rod (54) is arranged on the side of the swing cylinder (52) away from the outer shell (10). When the maintenance power box needs to be powered off, the linkage rod (54) is rotated to allow the linkage rod (54) to drive the swing cylinder (52) to swing, so that the movable clamp (53) drives the handle to rotate, so that the air switch is powered off; The inner expansion structure (60) is provided with a plurality of wire grooves (11) on the inner side wall of the outer shell (10), and the wire grooves (11) are arranged at intervals. The inner expansion structure (60) includes a stacking frame (61) arranged in the intervals of the wire grooves (11), and an elastic member (62) is arranged in the stacking frame (61), and a locking plate (63) is connected to the elastic member (62), and an electrical component is locked to the locking plate (63). After the wires are laid inside the wire groove (11), the side of the locking plate (63) where the electrical component is not installed is compressed by the elastic member (62) and locked to the stacking frame (61).

2. A maintenance power box according to claim 1, characterized in that: The mounting seat (51) comprises a connecting ring (511) embedded in the through-opening position; the side of the connecting ring (511) close to the outer shell (10) is connected to an inner guide cylinder (512); the side of the connecting ring (511) away from the outer shell (10) is connected to an outer guide cylinder (513); the length of the outer guide cylinder (513) is shorter than that of the inner guide cylinder (512); and the swing cylinder (52) passes through the outer guide cylinder (513), the connecting ring (511), and the inner guide cylinder (512).

3. A maintenance power box according to claim 2, characterized in that: The inner guide cylinder (512) is located within the projection range of the outer edge of the cover plate (30).

4. A maintenance power box according to claim 2, characterized in that: A plurality of guide ribs (5111) are fixed on the inner side of the connecting ring (511), a convex rib (5112) is provided on the inner side of the guide rib (5111), a plurality of rib grooves (521) are provided on the outer side of the swing cylinder (52), and a groove (522) is provided in the middle section of the rib groove (521), so that the swing cylinder (52) can rotate along the connecting ring (511) and slide forward and backward along the connecting ring (511) at the same time.

5. The maintenance power box according to claim 1, characterized in that: The movable clamp (53) comprises a connecting arm axially connected to the swing cylinder (52), and a U-shaped clamping handle (532) is connected to the connecting arm. The opening of the U-shaped clamping handle (532) is adapted to the handle of the air switch, and a soft pad (533) is provided on the inner side of the U-shaped clamping handle (532).

6. The maintenance power box according to claim 5, characterized in that: Heat-transmitting holes are provided on the side of the soft pad (533) facing the handle and on both sides of the soft pad (533).

7. The maintenance power box according to claim 1, characterized in that: The stacking frame (61) comprises a plurality of stacked sheets (611) arranged in the intervals of the wire trough (11), the height of the stacked sheets (611) being higher than the wire trough (11), and both sides of all the stacked sheets (611) being locked and fixed by a series connection plate (612).

8. The maintenance power box according to claim 7, characterized in that: The elastic member (62) comprises a plurality of spring seats (621) arranged on the outer side of the laminate (611), and a plurality of springs (622) higher than the laminate (611) are arranged on the spring seats (621), and the top ends of the springs (622) are connected to the locking plate (63).

9. The maintenance power box according to claim 7, characterized in that: The locking plate (63) comprises a support plate (631) for mounting components, the back side of the support plate (631) is provided with guide ribs (632) corresponding to the number of the stacked sheets (611), the support plate (631) is provided with a plurality of threaded holes, and the support plate (631) is locked to the stacked sheets (611) and the series connection plate (612) through the threaded holes, and the support plate (631) is also provided with a plurality of through grooves, and the through grooves are used to make way for cables in the wire trough (11).

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