A high-voltage switch cabinet with convenient maintenance

Abstract

The application relates to the technical field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet convenient to maintain, which comprises a cabinet body and a cabinet door arranged on the cabinet body, a through hole extending along the arrangement direction of the cabinet door and the cabinet body is arranged on the cabinet door, an observation window, a shielding plate with mesh holes and a shielding net are arranged on the cabinet door, the mesh holes of the shielding plate and the shielding net are different in size, the observation window, the shielding net and the shielding plate are sequentially arranged along the arrangement direction of the cabinet door and the cabinet body, and the observation window, the shielding plate and the shielding net are all located on the surface of the cabinet door close to the cabinet body and cover the through hole. The shielding plate with mesh holes and the shielding net are arranged to form a multilayer electromagnetic shielding structure, the shielding plate and the shielding net can filter electromagnetic interference of different frequencies in a synergistic manner, and the electromagnetic compatibility is significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of high-voltage switch cabinets, in particular to a high-voltage switch cabinet convenient to maintain. BACKGROUND

[0002] The high-voltage switch cabinet is a key power distribution equipment in the power system, and is widely used in power distribution and control of power plants, substations and industrial and mining enterprises, and mainly undertakes functions of power distribution, line protection and equipment control.

[0003] In the prior art, the high-voltage switch cabinet includes a cabinet body and a cabinet door, and an observation window is arranged on the cabinet door. In order to prevent electromagnetic pulse interference caused by internal fault arc from affecting external equipment, a shielding mesh plate with mesh holes is further arranged on the observation window. However, the shielding mesh in the prior art is relatively single, and cannot be applied to electromagnetic pulses of different frequencies, and the shielding effect is general. SUMMARY

[0004] In order to improve the shielding effect of the high-voltage switch cabinet, the present application provides a high-voltage switch cabinet convenient to maintain.

[0005] The high-voltage switch cabinet convenient to maintain provided by the present application adopts the following technical scheme:

[0006] The high-voltage switch cabinet convenient to maintain includes a cabinet body and a cabinet door arranged on the cabinet body, a through hole extending along the arrangement direction of the cabinet door and the cabinet body is arranged through the cabinet door, an observation window, a shielding plate with mesh holes and a shielding mesh are arranged on the cabinet door, the mesh holes of the shielding plate and the shielding mesh are different in size, the observation window, the shielding mesh and the shielding plate are arranged in sequence along the arrangement direction of the cabinet door and the cabinet body, and the observation window, the shielding plate and the shielding mesh are all located on the surface of the cabinet door close to the cabinet body and cover the through hole.

[0007] By adopting the above technical scheme, the observation window, the shielding plate with mesh holes and the shielding mesh are arranged to form a multi-layer electromagnetic shielding structure. The observation window provides visual monitoring, and the shielding plate and the shielding mesh with different mesh hole sizes can filter electromagnetic interference (such as high-frequency arc pulse and low-frequency magnetic field) of different frequencies, thereby significantly improving electromagnetic compatibility. At the same time, all components are integrated on the inner surface of the cabinet door and cover the through hole, which simplifies the structure layout, avoids external protruding components, and facilitates safe operation during daily maintenance.

[0008] Optionally, the shielding plate is detachably connected with the cabinet door, each side edge of the shielding plate is bent to form a bent edge, the bent edge and the surface of the shielding plate close to the cabinet door enclose a containing cavity, and the observation window and the shielding mesh are arranged in the containing cavity.

[0009] By adopting the technical scheme, the detachable shielding plate forms a containing cavity through the bent edge, and the observation window and the shielding net are built-in the containing cavity. The design makes the three constitute a modular unit, and only the shielding plate needs to be removed to simultaneously take away the observation window and the shielding net, which greatly simplifies the cleaning or replacement process. The bent edge also enhances the structural strength of the shielding plate, ensuring long-term shielding stability.

[0010] Optionally, the locking assembly, the locking component, and the key are further included. The cabinet door is rotatably arranged on the cabinet body. The rotation axis of the cabinet door extends in the vertical direction. The locking assembly is used for relatively locking the cabinet door on the cabinet body. The surface of the cabinet door away from the cabinet body is provided with a handle. The handle is rotatably arranged on the cabinet door through a rotating shaft. The rotating shaft extends in a direction perpendicular to the rotation axis of the cabinet door and perpendicular to the arrangement direction of the cabinet door and the cabinet body. The handle is used for rotating to unlock the cabinet door. The locking component is used for relatively locking the handle on the cabinet door. The key is used for unlocking the handle.

[0011] By adopting the technical scheme, when the cabinet body and the cabinet door are installed, the cabinet body needs to be transported to a specific place for installation of internal components. If the cabinet door is not locked during transportation, the cabinet door will be randomly opened and closed and will impact the cabinet body due to external factors such as shaking, which can easily cause the cabinet door or the cabinet body to be damaged. If the cabinet door is locked by the key, the operation is troublesome. The locking assembly is designed in addition to the locking component and the key, so that the cabinet door is locked by the locking assembly before transportation, without the need for key locking. The locking structure is also suitable for the case of temporarily closing and locking the cabinet door during maintenance. Specifically, the handle rotating shaft is arranged perpendicular to the rotation axis of the cabinet door and the door-cabinet arrangement direction, so that when the handle is rotated away from the cabinet body, the cabinet door can be opened naturally, realizing a natural operation posture of opening the cabinet door with one hand. This layout converts the rotary motion of the handle to the outside of the cabinet body into an unlocking action, which can lock the cabinet door by the locking assembly and unlock the locking component when the handle is rotated. Only one direction of action can achieve the unlocking and opening of the cabinet door, which is convenient and fast, and facilitates the maintenance and repair of the high-voltage switch cabinet.

[0012] Optionally, the locking assembly includes a transmission block, a locking rod, and a locking plate. The transmission block is fixedly arranged on the rotating shaft. The locking rod is slidably arranged on the surface of the cabinet door close to the cabinet body in the vertical direction. The locking plate is fixedly arranged on the surface of the cabinet body close to the cabinet door. A locking groove extending in the vertical direction is formed in the lower surface of the locking plate for the locking rod to insert. The transmission block is used for abutting the locking rod to drive the locking rod to slide downward and exit the locking groove.

[0013] By adopting the technical scheme, when the locking rod is inserted into the locking groove, the cabinet door is locked, the rotating shaft drives the transmission block to rotate when rotating, the transmission block rotates to abut against the locking rod, and the locking rod is pushed to move downward to exit the locking groove, thereby completing the unlocking of the cabinet door. The transmission block converts the rotary motion of the handle rotating shaft into the vertical sliding motion of the locking rod, and mechanical unlocking is realized by the locking rod exiting the locking groove. The locking plate is fixed to the cabinet body, which ensures that the force is directly transmitted to the cabinet body frame when the cabinet is locked, improves the anti-vibration capability, and prevents accidental opening. The locking structure has a simple overall structure, is convenient to process, does not require a driving source, saves energy, realizes locking and unlocking by relying on a mechanical structure, and has high stability.

[0014] Optionally, a reset elastic member for sliding the locking rod upward is connected between the locking rod and the cabinet door, an inclined guide slope is formed on the surface of the locking plate close to the cabinet door, the distance between the guide slope and the cabinet body decreases in the vertical downward direction, and the locking rod is used for slidingly abutting against the guide slope.

[0015] By adopting the technical scheme, the reset elastic member automatically resets the locking rod to slide upward, the guide slope forces the locking rod to slide into the locking groove along the guide slope against the elastic force of the reset elastic member when the door is closed, and the door is automatically locked when it is closed. This design eliminates the manual locking step and improves the operation efficiency; the inclined guide slope can also compensate for the assembly error to ensure reliable locking under different conditions.

[0016] Optionally, the locking assembly comprises a locking block slidingly arranged on the surface of the cabinet door away from the cabinet body along the axial direction of the rotating shaft, a locking slot extending in the sliding direction of the locking block is formed in the handle for inserting the locking block, and the key is used for driving the locking block to insert into the locking slot.

[0017] By adopting the technical scheme, the key drives the locking block to insert into the locking slot of the handle, and the physical locking function is realized. The locking assembly is independent of the locking assembly, and the handle can be forcibly locked by the key when the high-voltage switch cabinet is normally working, so as to prevent the risk of equipment power-on caused by accidental operation. The sliding locking block structure is compact, and the interference problem of the external padlock is avoided.

[0018] Optionally, the locking assembly further comprises a rotating member rotatably arranged on the surface of the cabinet door away from the cabinet body, the rotating axis of the rotating member extends along the arrangement direction of the cabinet door and the cabinet body, a rotating groove is formed in the surface of the rotating member, the key is used for inserting into the rotating groove and rotating to drive the rotating member to rotate, an inclined locking slope is formed on the surface of the rotating member, the rotating member is used for rotating to abut against the locking slope and push the locking block to insert into the locking slot, and an unlocking elastic member for making the locking block exit the locking slot is connected between the locking block and the cabinet door.

[0019] By adopting the technical scheme, the key rotates the rotating member by rotating the groove, so that the rotating member rotates to the locking slope abutting against the locking block, and the locking block is pushed into the locking groove to realize the locking of the handle. When the key is reversed, the rotating member rotates to the locking slope disengaging from the locking block, and the locking block exits the locking groove under the elastic force of the unlocking elastic member to complete the unlocking of the handle. The inclined locking slope converts the rotary motion of the rotating member into the linear sliding of the locking block to realize "small-angle rotation triggering large-stroke locking". The unlocking elastic member ensures that the locking block is automatically reset after the key is pulled out, avoiding jamming. The mechanism reduces the operation strength in a mechanical force amplification manner and improves the locking reliability.

[0020] Optionally, the cabinet body is provided with a shape memory alloy element on the surface close to the cabinet door, the shape memory alloy element extends in the direction close to or away from the cabinet body when heated, and the shape memory alloy element is used to extend to shield the locking slot.

[0021] By adopting the technical scheme, when the cabinet abnormally heats (such as arc fault or fire), the shape memory alloy element extends under heating to automatically shield the locking slot, so that even if the key unlocks the handle, the handle cannot rotate to drive the locking rod to exit the locking slot. This design makes the cabinet door unable to be unlocked, and forces the cabinet door to remain locked to prevent high-temperature gas or arc from being sprayed out to cause damage to external structures or personnel, thereby gaining time for fault handling. The element directly responds to the temperature signal without the need for external circuit, and has strong anti-interference performance.

[0022] Optionally, the cabinet door is provided with a button on the surface close to the cabinet body, the shape memory alloy element is used to extend to trigger the button, the cabinet body is provided with a heat dissipation hole, the outer wall of the cabinet body is provided with a shielding drive source and a baffle, the shielding drive source is used to drive the baffle to move to shield the heat dissipation hole, and the button is used to control the shielding drive source to work.

[0023] By adopting the technical scheme, after the shape memory alloy extends to trigger the button, the shielding drive source is started in linkage to drive the baffle to close the heat dissipation hole, thereby forming a closed compartment. This active isolation mechanism can inhibit the oxygen supply in the cabinet, delay the spread of the arc, and block the high-temperature gas from leaking out.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. By providing the shielding plate with mesh holes and the shielding net, a multi-layer electromagnetic shielding structure is formed, and the shielding plate and the shielding net cooperate to filter electromagnetic interference of different frequencies, thereby significantly improving electromagnetic compatibility;

[0026] 2. The locking assembly is designed outside the lock assembly and the key, so that the cabinet door is locked by the locking assembly before transportation, without the need for key locking. The locking structure is also suitable for temporary closing and locking of the cabinet door during maintenance process. When the handle is turned, the cabinet door can be opened naturally, realizing the natural operation posture of single-handed opening of the cabinet door.

[0027] 3. When the cabinet abnormally heats up, the cabinet door is forced to remain locked to prevent high-temperature gas or arc from spewing out to cause harm to external structures or personnel. The shape memory alloy element directly responds to the temperature signal without the need for external circuits, and has strong anti-interference performance. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of embodiment 1 of the present application.

[0029] Figure 2 is a structural schematic diagram of the cabinet door in embodiment 1 of the present application.

[0030] Figure 3 is an exploded view of the cabinet door, observation window, shielding net and shielding plate in embodiment 1 of the present application.

[0031] Figure 4 is a structural schematic diagram of embodiment 2 of the present application.

[0032] Figure 5 is a side view of embodiment 2 of the present application.

[0033] Figure 6 is a front view of the handle and mounting seat in embodiment 2 of the present application.

[0034] Figure 7 is a structural schematic diagram of the key, handle and mounting seat in embodiment 2 of the present application.

[0035] Figure 8 is an exploded view of the key, handle and mounting seat in embodiment 2 of the present application.

[0036] Figure 9 is a structural schematic diagram of the heat dissipation hole in embodiment 2 of the present application.

[0037] Figure 10 is a structural schematic diagram of the cabinet door in embodiment 2 of the present application.

[0038] Explanation of reference signs: 1, cabinet body; 11, heat dissipation hole; 2, cabinet door; 21, through hole; 3, observation window; 4, shielding plate; 41, bent edge; 42, containing cavity; 5, shielding net; 6, locking assembly; 61, transmission block; 62, locking rod; 63, locking plate; 631, locking groove; 632, guide inclined surface; 7, locking assembly; 71, locking block; 72, rotating piece; 721, rotating groove; 722, locking inclined surface; 8, key; 9, handle; 91, rotating shaft; 92, locking groove; 93, insertion hole; 100, reset elastic piece; 110, unlocking elastic piece; 120, shape memory alloy element; 130, button; 140, shielding driving source; 150, baffle; 160, mounting seat; 170, limiting piece; 180, sealing ring. DETAILED DESCRIPTION

[0039] The following will be described in detail below with reference to the accompanying drawings. Figures 1-10 The application is further described in detail.

[0040] Embodiment 1

[0041] Embodiment 1 of the application discloses a high-voltage switch cabinet convenient to maintain. Referring to Figure 1 With Figure 2 With Figure 3 The high-voltage switch cabinet convenient to maintain comprises a cabinet body 1 and a cabinet door 2 mounted on the cabinet body 1, a front-rear direction is arranged from front to back, a through hole 21 extending along the front-rear direction is provided through a surface of the cabinet door 2 away from the cabinet body 1 (hereinafter referred to as an outer surface), an observation window 3 (made of transparent glass material), a shielding plate 4 with mesh holes and a shielding net 5 are arranged on a surface of the cabinet door 2 close to the cabinet body 1 (hereinafter referred to as an inner surface), the shielding plate 4 and the shielding net 5 have different mesh hole sizes, in this embodiment, the mesh hole size of the shielding plate 4 is larger than that of the shielding net 5, the observation window 3, the shielding net 5 and the shielding plate 4 are arranged in sequence along the front-rear direction, and the observation window 3, the shielding plate 4 and the shielding net 5 all cover the through hole 21.

[0042] Referring to Figure 2 With Figure 3 The shielding plate 4 is detachably connected to the cabinet door 2 through a bolt assembly. The shielding plate 4 is a square plate, four side edges of the shielding plate 4 are bent to form bent edges 41 towards the inner surface of the cabinet door 2, the bent edges 41 and the inner surface of the cabinet door 2 enclose a containing cavity 42, the observation window 3 and the shielding net 5 are placed in the containing cavity 42, and the shielding plate 4 is used to abut the shielding net 5 and the observation window 3 against the inner surface of the cabinet door 2.

[0043] The installation principle of the high-voltage switch cabinet convenient to maintain in the embodiment 1 is as follows: first, the observation window 3 is placed on the inner surface of the cabinet door 2, so that the observation window 3 covers the through hole 21; then, the shielding net 5 is placed on the observation window 3; finally, the shielding plate 4 is covered on the observation window 3 and the shielding net 5, so that the observation window 3 and the shielding net 5 are accommodated in the accommodation cavity 42, and the shielding plate 4 is fixed through the bolt assembly.

[0044] Embodiment 2

[0045] With reference to Figure 4 With Figure 5 Different from the embodiment 1, the high-voltage switch cabinet convenient to maintain in the embodiment further comprises a locking assembly 6, which is used for locking the cabinet door 2 on the cabinet body 1. The cabinet door 2 is rotationally installed on the cabinet body 1, and the rotation axis of the cabinet door 2 extends in the vertical direction. One side of the cabinet door 2 is rotationally installed on the cabinet body 1, and the outer surface of the cabinet door 2 away from the side is fixedly provided with a mounting seat 160, and a handle 9 is mounted on the mounting seat 160. The handle 9 is fixedly provided with a rotating shaft 91 extending in a direction perpendicular to the vertical direction and perpendicular to the front-rear direction, and the handle 9 is rotationally installed on the mounting seat 160 through the rotating shaft 91. The handle 9 is used for unlocking the cabinet door 2 by rotating.

[0046] With reference to Figure 5 The locking assembly 6 comprises a transmission block 61, a locking rod 62 and a locking plate 63. The transmission block 61 is fixedly installed on the rotating shaft 91, the locking rod 62 is slidingly installed on the inner surface of the cabinet door 2 in the vertical direction, and the transmission block 61 is used for rotating to abut against the locking rod 62. The locking plate 63 is fixedly installed on the surface of the cabinet body 1 close to the cabinet door 2, and the lower surface of the locking plate 63 is provided with a locking slot 631 extending in the vertical direction for inserting the locking rod 62. The transmission block 61 is located above the locking rod 62, when the handle 9 is pulled outward to rotate the handle 9 away from the cabinet door 2, the transmission block 61 is driven to rotate downward, the transmission block 61 abuts against the locking rod 62, the locking rod 62 is pushed to slide downward and exit the locking slot 631, and at this time, the handle 9 is continuously pulled outward to open the cabinet door 2.

[0047] With reference to Figure 5 The locking rod 62 and the cabinet door 2 are connected with a reset elastic member 100, the reset elastic member 100 is a compression spring, and the reset elastic member 100 is used for pushing the locking rod 62 to slide upward and drive the handle 9 to rotate to reset.

[0048] With reference to Figure 5The locking plate 63 has an inclined guide slope 632 on its surface away from the cabinet body 1. The distance between the guide slope 632 and the surface of the cabinet body 1 near the cabinet door 2 decreases vertically downwards. The locking rod 62 is used to slide against the guide slope 632. When the cabinet door 2 is closed, the locking rod 62 slides against the guide slope 632, causing the locking rod 62 to slide downwards against the elastic force of the reset elastic member 100, continuing to close the cabinet door 2. Under the action of the elastic force of the reset elastic member 100, the locking rod 62 inserts into the locking groove 631 to lock the cabinet door 2.

[0049] Reference Figure 6 The high-voltage switchgear for easy maintenance also includes a locking assembly 7, which locks the handle 9 onto the mounting base 160. The locking assembly 7 includes a locking block 71 slidably mounted on the mounting base 160 in an axial direction parallel to the rotating shaft 91. The handle 9 has a locking groove 92 extending along the sliding direction of the locking block 71, into which the locking block 71 is inserted. An unlocking elastic element 110, which is a tension spring, connects the locking block 71 to the mounting base 160 and pulls the locking block 71 out of the locking groove 92.

[0050] Reference Figure 5 and Figure 6 and Figure 7 The locking assembly 7 also includes a rotating member 72 rotatably mounted on the mounting base 160. The rotation axis of the rotating member 72 extends in the front-rear direction, and the rotation axis of the rotating member 72 is arranged in a direction perpendicular to both the vertical and front-rear directions with the locking block 71. An inclined locking ramp 722 is formed on the surface of the rotating member 72 near the locking block 71, and the rotating member 72 is used to rotate until the locking ramp 722 slides against the locking block 71. A limiting member 170 is fixedly mounted on the mounting base 160 for contact with the rotating member 72. When the rotating member 72 rotates to a horizontal position, the rotating member 72 contacts the limiting member 170 and the locking block 71.

[0051] Reference Figure 6 and Figure 8The high-voltage switch cabinet convenient to maintain further comprises a key 8, and a handle 9 and the mounting seat 160 are both provided with a hole 93 for inserting and penetrating the key 8. The rotating member 72 is provided with a rotating groove 721 for inserting and driving the rotating member 72 to rotate. When the key 8 is inserted into the rotating groove 721, the key 8 is rotated to drive the rotating member 72 to rotate, the rotating member 72 is rotated to the locking inclined surface 722 and the locking block 71 abut, the rotating member 72 is continuously rotated, the locking inclined surface 722 drives the locking block 71 to slide, and the locking block 71 slides into the locking groove 92, so that the handle 9 is locked on the mounting seat 160. When the key 8 is reversed, the rotating member 72 is reversed, the rotating member 72 is separated from the locking block 71, and the locking block 71 is withdrawn from the locking groove 92 under the elastic force of the unlocking elastic member 110, so that the handle 9 is unlocked.

[0052] With reference to Figure 5 and Figure 9 The surface of the cabinet body 1 close to the cabinet door 2 is fixedly provided with a shape memory alloy element 120, and the shape memory alloy element 120 is located below the locking plate 63. The outer wall of the cabinet body 1 is provided with a heat dissipation hole 11. The inner surface of the cabinet door 2 is fixedly provided with a button 130. The outer wall of the cabinet body 1 is fixedly provided with a shielding driving source 140, and the shielding driving source 140 is fixedly provided with a shielding plate 150 on the telescopic rod. The shielding driving source 140 is used to drive the shielding plate 150 to move to shield the heat dissipation hole 11. The button 130 is wirelessly connected with the shielding driving source 140, and the button 130 is used to control the shielding driving source 140 to work. When the temperature in the cabinet body 1 rises due to failure or fire, the shape memory alloy element 120 is heated and extends away from the cabinet body 1, the shape memory alloy element 120 extends to shield the locking groove 631, and triggers the button 130, starts the shielding driving source 140, drives the shielding plate 150 to move to shield the heat dissipation hole 11, and isolates air.

[0053] With reference to Figure 9 and Figure 10 The inner surface of the cabinet door 2 is fixedly provided with a sealing ring 180, and the sealing ring 180 is used to seal the inner cavity of the cabinet body 1. The above-mentioned locking assembly 6, locking assembly 7 and related structures are all located outside the sealing ring 180, that is, not communicated with the inner cavity of the cabinet body 1.

[0054] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-voltage switchgear that is easy to maintain, characterized in that: The cabinet includes a cabinet body (1) and a cabinet door (2) on the cabinet body (1). The cabinet door (2) has a through hole (21) extending along the arrangement direction of the cabinet door (2) and the cabinet body (1). The cabinet door (2) is provided with an observation window (3), a mesh shielding plate (4) and a shielding mesh (5). The mesh sizes of the shielding plate (4) and the shielding mesh (5) are different. The observation window (3), the shielding mesh (5) and the shielding plate (4) are arranged sequentially along the arrangement direction of the cabinet door (2) and the cabinet body (1). The observation window (3), the shielding plate (4) and the shielding mesh (5) are all located on the surface of the cabinet door (2) near the cabinet body (1) and cover the through hole (21). It also includes a locking component (6), a locking component (7), and a key (8). The cabinet door (2) is rotatably mounted on the cabinet body (1). The rotation axis of the cabinet door (2) extends vertically. The locking component (6) is used to lock the cabinet door (2) relative to the cabinet body (1). A handle (9) is provided on the surface of the cabinet door (2) away from the cabinet body (1). A pivot (91) is provided on the handle (9). The handle (9) is rotatably mounted on the cabinet door (2) through the pivot (91). The pivot (91) extends in a direction perpendicular to the rotation axis of the cabinet door (2) and perpendicular to the arrangement direction of the cabinet door (2) and the cabinet body (1). The handle (9) is used to rotate to unlock the cabinet door (2), the locking assembly (7) is used to lock the handle (9) relative to the cabinet door (2), and the key (8) is used to unlock the handle (9); the locking assembly (6) includes a transmission block (61), a locking rod (62) and a locking plate (63), the transmission block (61) is fixedly mounted on the rotating shaft (91), the locking rod (62) is slidably mounted on the surface of the cabinet door (2) near the cabinet body (1) in the vertical direction, and the locking plate (63) is fixedly mounted on the surface of the cabinet body (1) near the cabinet door (2), and the lower surface of the locking plate (63) has a vertically mounted opening. A locking groove (631) extending in the direction for the locking rod (62) to be inserted, the transmission block (61) is used to abut against the locking rod (62) and drive the locking rod (62) to slide downward out of the locking groove (631); a reset elastic element (100) is connected between the locking rod (62) and the cabinet door (2) for the locking rod (62) to slide upward; a guide slope (632) is formed on the surface of the locking plate (63) near the cabinet door (2) and is inclined; the distance between the guide slope (632) and the cabinet (1) decreases in the vertical downward direction; the locking rod (62) is used to slide against the guide slope (632).

2. The high-voltage switchgear for easy maintenance according to claim 1, characterized in that: The shielding plate (4) is detachably connected to the cabinet door (2). Each side of the shielding plate (4) is bent to form a bent edge (41). The bent edge (41) and the surface of the shielding plate (4) near the cabinet door (2) enclose to form a receiving cavity (42). The observation window (3) and the shielding mesh (5) are both located in the receiving cavity (42).

3. The high-voltage switchgear for easy maintenance according to claim 1, characterized in that: The locking assembly (7) includes a locking block (71) that is slidably disposed on the surface of the cabinet door (2) away from the cabinet body (1) along an axial direction parallel to the pivot (91). The handle (9) has a locking groove (92) extending along the sliding direction of the locking block (71) for the locking block (71) to be inserted. The key (8) is used to drive the locking block (71) to be inserted into the locking groove (92).

4. The high-voltage switchgear for easy maintenance according to claim 3, characterized in that: The locking assembly (7) further includes a rotating member (72) rotatably disposed on the surface of the cabinet door (2) away from the cabinet body (1). The rotation axis of the rotating member (72) extends along the arrangement direction of the cabinet door (2) and the cabinet body (1). A rotating groove (721) is provided on the rotating member (72). The key (8) is used to insert into the rotating groove (721) and rotate to drive the rotating member (72) to rotate. A locking inclined surface (722) is formed on the surface of the rotating member (72). The rotating member (72) is used to rotate until the locking inclined surface (722) abuts against the locking block (71) and pushes the locking block (71) into the locking groove (92). An unlocking elastic member (110) is connected between the locking block (71) and the cabinet door (2) to make the locking block (71) exit the locking groove (92).

5. The high-voltage switchgear for easy maintenance according to claim 1, characterized in that: The cabinet (1) has a shape memory alloy element (120) on its surface near the cabinet door (2). When heated, the shape memory alloy element (120) extends in a direction closer to and away from the cabinet (1). The shape memory alloy element (120) is used to extend to the blocking locking groove (631).

6. The high-voltage switchgear for easy maintenance according to claim 5, characterized in that: A button (130) is provided on the surface of the cabinet door (2) near the cabinet body (1). The shape memory alloy element (120) is used to extend to the trigger button (130). A heat dissipation hole (11) is provided on the cabinet body (1). A shielding drive source (140) and a baffle (150) are provided on the outer wall of the cabinet body (1). The shielding drive source (140) is used to drive the baffle (150) to move to shield the heat dissipation hole (11). The button (130) is used to control the shielding drive source (140) to work.

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