A compact switch cabinet with a new earthing switch transmission device

Abstract

The present application relates to a compact switch cabinet with a novel grounding switch transmission device, wherein the cabinet body is divided into a busbar room, a trolley room and a cable room by a detachable metal partition; the grounding switch assembly is fixed in the cable room, the grounding switch assembly includes a grounding switch coupling, a grounding spring and a grounding knife, the grounding switch transmission assembly includes a grounding drive main shaft and a grounding switch transmission device, and a rotating drive member is provided at one end of the grounding drive main shaft located in the trolley room, the grounding switch transmission device and the grounding drive main shaft are rotatably matched, one end of the grounding switch coupling is rotatably fixed on the grounding switch transmission device, and the grounding switch transmission device rotates the original large-angle connecting rod through two continuous mechanical steering conversions of the grounding guide rail, and is improved into a mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet body, and still maintaining a safe high-voltage isolation distance in the compact switch cabinet, which is conducive to the miniaturization and compactness of the overall switch cabinet design.

Description

Technical Field

[0001] The present application relates to the field of switch cabinets, and in particular to a compact switch cabinet with a novel grounding switch transmission device. Background Art

[0002] Switchgear is a common complete set of switchgear. The key components such as circuit breaker trolleys, grounding switches, transformers and contact boxes used in the current indoor medium-voltage complete switchgear are technical products introduced in the 1990s, and the technology is relatively conservative. Under the overall trend of compactness and modularization of the technology trend in the switchgear industry, it is very necessary for the grounding switches and their transmission devices to be highly reliable and more compact.

[0003] The Chinese patent document with patent number CN202111466392.7 discloses a switch cabinet, which includes a cabinet body and a grounding switch transmission mechanism. The grounding switch transmission mechanism includes an operating lever, a transmission crank arm, a fixed seat, a worm, a worm wheel and a worm wheel shaft. The transmission crank arm drives the switch main shaft crank arm connected to the grounding switch main shaft to move by swinging to realize the opening and closing of the grounding switch. The transmission crank arm is stopped to drive the transmission crank arm to swing.

[0004] After the width of the conventional 12kV switch cabinet is transformed from 800mm to a compact 550mm, or the width of the conventional 24KV switch cabinet is changed from 1000mm to a compact 800mm, the transmission mechanism of the above-mentioned grounding switch, including multiple rotating transmission rods such as the transmission crank arm, the screw rod, and the switch main shaft crank arm, can ensure a safe distance when rotating in a large box. However, after the box is miniaturized, the above-mentioned rotating grounding switch transmission device appears bloated, and the driving method of the above-mentioned grounding switch is no longer suitable for a compact box. Moreover, the rotation of the long rod body cannot completely and safely complete the on and off of the grounding switch when power is on, and the safety cannot be guaranteed. Therefore, it is necessary to design a new transmission structure of the grounding switch, which can be applied to compact switch cabinets and conventional switch cabinets.

[0005] Therefore, in some places with limited space, a switch cabinet with a smaller overall structure that meets the above safety regulations is needed. Summary of the invention

[0006] Based on this, it is necessary to propose a compact switch cabinet with a new type of grounding switch transmission device to address the problems of large rotation range and unsafe transmission process of the grounding switch transmission device in the traditional switch cabinet.

[0007] The present application provides a compact switch cabinet with a novel earthing switch transmission device, comprising:

[0008] A cabinet body, wherein the cabinet body is divided into a busbar room, a trolley room and a cable room by a detachable metal partition, and the cable room is provided with external cables and insulation components;

[0009] A grounding switch assembly, the grounding switch assembly is fixed in the cable room, the grounding switch assembly comprises a grounding switch coupling, a grounding spring and a grounding knife, one end of the grounding knife is fixed on the grounding switch coupling, the grounding switch coupling rotates to drive the grounding knife, so that the grounding knife is connected to or separated from the external cable;

[0010] The grounding switch transmission assembly includes a grounding drive main shaft and a grounding switch transmission device. The grounding drive main shaft passes through the trolley chamber and the cable chamber in sequence. A rotating drive member is provided at one end of the grounding drive main shaft located in the trolley chamber. The grounding switch transmission device and the grounding drive main shaft are rotationally matched. One end of the grounding switch connecting shaft is rotationally fixed to the grounding switch transmission device.

[0011] Preferably, the grounding switch transmission device includes a support plate and a grounding rail, the support plate is fixed on the side wall of the cable chamber, the lower end of the grounding rail is rotatably connected to a lower adapter device, the upper end of the grounding rail is connected to an upper adapter device, the lower adapter device is fixed to the grounding drive main shaft, and the end of the grounding switch connecting shaft is rotatably connected to the upper adapter device. When the grounding drive main shaft rotates, the lower adapter device rotates to drive the grounding rail to move, and the grounding rail drives the upper adapter device and the grounding switch connecting shaft to rotate, so that the grounding knife rotates.

[0012] Preferably, the lower transfer device includes a lower rotating gear and a gear clamp, the lower rotating gear is sleeved on the grounding drive main shaft and rotates coaxially with the grounding drive main shaft, a lower rack is provided at the lower end of the grounding guide rail, and the lower rotating gear cooperates with the lower rack gear.

[0013] Preferably, two gear clamps are provided, the bottom end of each gear clamp is fixed on the support plate, each gear clamp is provided with a through hole, and the two ends of the lower rotating gear are respectively rotatably clamped on the two through holes.

[0014] Preferably, positioning grooves are further provided on both side walls of the lower rack, and two symmetrically arranged positioning plates are further provided on the support plate, and an end portion of each positioning plate abuts against a corresponding positioning groove.

[0015] Preferably, a sliding groove is provided on the support plate, and one side of the grounding rail is slidably engaged in the sliding groove.

[0016] Preferably, the upper transfer device includes an upper rotating gear and a gear mounting plate, the upper rotating gear is rotatably clamped on the gear mounting plate, the upper end side wall of the grounding guide rail is provided with an upper rack, the upper rotating gear and the upper rack gear cooperate, and the upper rotating gear is sleeved on one end of the grounding switch connecting shaft.

[0017] Preferably, both ends of the gear mounting plate are fixed to the support plate by screws, an upper limit slot is provided on the side of the top of the grounding guide rail away from the upper rotating gear, a limit wheel is provided on the screw close to the limit slot, and the limit wheel is rotatably engaged with the upper limit slot.

[0018] Preferably, a grounding opening and closing indicator is further provided at one end of the grounding drive main shaft close to the rotating drive member, and an opening indication mark and a closing indication mark are coated on the grounding opening and closing indicator.

[0019] Preferably, the end of the grounding drive shaft close to the grounding switch transmission assembly is also connected to a rear door interlock device, the rear door interlock device includes a rear door lock handle and a rear door lock connecting rod, the door lock connecting rod is provided with a limit slot, and the end of the grounding drive shaft close to the limit slot is connected to a grounding fan-shaped positioning plate, and when the grounding drive shaft rotates to drive the grounding fan-shaped positioning plate to abut against the limit slot, the rear door lock handle can be rotated.

[0020] Technical advantages of this application:

[0021] 1. First, by setting a grounding rail, the lower adapter drives the grounding rail to move up and down in its length direction, and then the upper adapter drives the grounding switch shaft, thereby triggering the grounding spring, so that the grounding knife is disconnected or connected to the external cable, to achieve safe grounding or disconnection of grounding. The grounding switch transmission device is attached to the side wall of the cabinet. The grounding switch transmission device rotates the original large-angle connecting rod through two continuous mechanical steering conversions of the grounding rail, and is improved to a mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet. In the compact switch cabinet, a safe high-voltage isolation distance is still maintained, which is conducive to the miniaturization and compactness of the overall switch cabinet.

[0022] 2. At the same time, the lower rack and the lower rotating gear are matched with each other, and the upper rack and the upper rotating gear are matched with each other. Through the mechanical transmission of the gears, not only can the transmission angle be more accurate, but the operation of the switch grounding knife can be achieved by only rotating the main shaft by 90 degrees or 180 degrees, thus avoiding the problem of inaccurate existing connecting rod transmission and no fixed rotation angle. In addition, the gear transmission has high transmission efficiency, which is more labor-saving than the existing connecting rod principle that requires a lever. The overall control method through two gear transmissions is more accurate, labor-saving and reliable.

[0023] 3. The sliding groove can limit the grounding rail to slide only up and down. The positioning groove and the upper limit groove can limit the moving direction and up and down moving distance of the grounding rail, thereby improving accuracy and safety;

[0024] 4. The grounding drive spindle and the rear door interlock device are synchronously connected to prevent the rear door from being opened when the ground is connected. Only after the grounding drive spindle rotates and the grounding knife is connected to the external cable, the entire circuit is grounded, that is, the grounding fan-shaped positioning plate is engaged with the limit slot, can the rear door be opened through the rear door lock handle, which plays a role in safety interlocking protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0026] Figure 1 A schematic diagram of the overall structure of a compact switch cabinet provided in one embodiment of the present application.

[0027] Figure 2 A schematic diagram of the internal three-dimensional structure of a compact switch cabinet provided in one embodiment of the present application.

[0028] Figure 3 In one embodiment of this application Figure 2 A partial enlarged view of the structure.

[0029] Figure 4 It is an assembly structure diagram of the grounding switch transmission assembly in one embodiment of the present application.

[0030] Figure 5 A three-dimensional structural diagram of a grounding switch transmission assembly provided in one embodiment of the present application.

[0031] Figure 6 A structural diagram of a rotating drive component and a grounding opening and closing indicator provided in one embodiment of the present application.

[0032] Figure 7 A schematic diagram of the back structure of a grounding switch transmission assembly provided in one embodiment of the present application.

[0033] Figure 8 A partial structural three-dimensional diagram of a grounding switch transmission assembly provided in an embodiment of the present application Figure 1 .

[0034] Fig. 9 A partial structural three-dimensional diagram of a grounding switch transmission assembly provided in an embodiment of the present application Figure 2 .

[0035] Reference numerals: cabinet 1; busbar room 11; trolley room 12; cable room 13; external cable 14; insulation assembly 15; grounding switch assembly 2; grounding switch coupling 21; grounding spring 22; grounding knife 23;

[0036] Grounding switch transmission assembly 3; grounding drive main shaft 4; rotation drive member 41; grounding opening and closing indicator 42;

[0037] Grounding switch transmission device 5; support plate 51; sliding groove 510; positioning plate 511;

[0038] Ground rail 52; lower rack 521; upper rack 522; positioning groove 523;

[0039] Lower adapter 53; lower rotating gear 531; gear clamping plate 532; through hole 533;

[0040] Upper adapter 54; upper rotating gear 541; gear mounting plate 542; screw 543; upper limit slot 540; limit wheel 544; rear door interlock device 6; rear door lock handle 61; rear door lock connecting rod 62; limit slot 621; grounding sector positioning plate 63. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] For compact 550mm 12kV switchgear or compact 800mm 24KV switchgear, due to the reduction in the volume of the overall box, the positions and spacings of various components need to be arranged with reduced spacings while ensuring safety. As an important safety facility of the switchgear, the earthing switch has a transmission mechanism that includes multiple rotating transmission rods such as a transmission crank arm, a screw rod, and a switch spindle crank arm. When rotating in a large box, a safe distance can be guaranteed. In a compact switchgear, the crank arm, the screw rod, and the switch spindle crank arm not only occupy a large volume during use, but also because the rotation of the screw rod and the switch spindle crank arm requires a large rotation radius, the safety isolation distance from the high-voltage live body in the switchgear is insufficient, and there is a risk of conduction and energization. When energized, the earthing switch cannot be turned on and off completely and safely, and safety cannot be guaranteed.

[0046] The present application provides a compact switch cabinet with a novel grounding switch transmission device, which is used to solve the problem that the original grounding switch transmission device is large in size and the unsafe process of the transmission device disconnecting the grounding switch is solved, and the entire grounding switch transmission device is kept outside a safe isolation distance.

[0047] like Figures 1 to 9 As shown, in one embodiment, a compact switch cabinet with a novel grounding switch transmission device includes a cabinet body 1, in which a grounding switch assembly 2 and a grounding switch transmission assembly 3 are arranged. By applying a rotational force to the grounding switch transmission assembly 3, the grounding knife of the grounding switch assembly 2 is engaged or separated through the internal transmission of the grounding switch transmission assembly 3, so that the grounding knife is opened or closed.

[0048] like Figure 1 As shown: the cabinet 1 of the compact switch cabinet of the present invention is divided into a busbar room 11, a trolley room 12 and a cable room 13 by a detachable metal partition. The busbar room 11 is connected with a high-voltage three-phase transmission point cable. The trolley is placed in the trolley room 12 for connecting and controlling the circuit breaker. The cable room 13 is provided with an external cable 14 and an insulating assembly 15. Three external cables 14 are respectively connected to three output ends of the circuit breaker. The insulating assembly 15 is used to isolate and protect the three external cables.

[0049] like Figure 2-Figure 5 As shown: the grounding switch assembly 2 of the present invention is of conventional design. The entire grounding switch assembly 2 is fixed in the cable chamber 13. The grounding switch assembly 2 includes a grounding switch coupling 21, a grounding spring 22 and a grounding knife 23. One end of the grounding knife 23 is fixed on the grounding switch coupling 21. The grounding spring 22 serves as an energy storage element. When the grounding switch coupling 21 rotates, the grounding knife 23 is driven to quickly connect and disconnect the grounding knife 23 with the external cable 14.

[0050] like Figure 3 As shown: the end of the grounding drive main shaft 4 close to the grounding switch transmission assembly 3 is also connected to the rear door interlock device 6, the rear door interlock device 6 includes a rear door lock handle 61 and a rear door lock connecting rod 62, the door lock connecting rod 62 is provided with a limit slot 621, and the end of the grounding drive main shaft 4 close to the limit slot 621 is connected to a grounding fan-shaped positioning plate 63. When the grounding drive main shaft 4 rotates and drives the grounding fan-shaped positioning plate 63 to abut against the limit slot 621, the rear door lock handle 61 can rotate. .

[0051] The grounding drive spindle 4 and the rear door interlock device 6 are synchronously connected to prevent the rear door from being opened in a charged state. Only after the grounding drive spindle 4 rotates and connects the grounding knife 23 to the external cable 14, and the entire circuit is grounded, that is, after the grounding fan-shaped positioning plate 63 engages with the limit slot 621, can the rear door be opened through the rear door lock handle 61, thereby playing the role of safety interlocking protection.

[0052] like Figure 3-9 As shown: The present invention is to reduce the size of the grounding switch transmission assembly and reduce the operating radius of the grounding switch transmission assembly during operation to maintain a safe high-voltage isolation distance.

[0053] The grounding switch transmission assembly 3 designed in the present invention includes a grounding drive main shaft 4 and a grounding switch transmission device 5. The grounding drive main shaft 4 passes through the trolley chamber 12 and the cable chamber 13 in sequence. A rotating drive member 41 is provided at one end of the grounding drive main shaft 4 located in the trolley chamber 12. The grounding switch transmission device 5 and the grounding drive main shaft 4 are rotatably matched, and one end of the grounding switch connecting shaft 21 is rotatably fixed to the grounding switch transmission device 5.

[0054] like Figure 6 As shown: a rotating drive member 41 is arranged at one end of the grounding drive main shaft 4, and a grounding opening and closing indicator 42 is also arranged at one end of the grounding drive main shaft 4 close to the rotating drive member 41, and the grounding opening and closing indicator 42 is coated with an opening indicator mark and a closing indicator mark, which are red and green respectively, red for being energized and not grounded, and green for being grounded.

[0055] The external operator only needs to fix 90 degrees or 180 degrees on the rotating drive member 41 through the rocker arm. The specific rotation angle is adjusted according to the size of the gear and the size of the switch cabinet. At the same time, the grounding drive main shaft 4 rotates to drive the grounding opening and closing indicator 42 to display the change of status and indicate that it has been safely closed.

[0056] like Figure 8-Figure 9 The grounding switch transmission device 5 includes a support plate 51 and a grounding rail 52, wherein the support plate 51 is fixed on the side wall of the cable chamber 13, the lower end of the grounding rail 52 is rotatably connected to a lower adapter 53, the upper end of the grounding rail 52 is connected to an upper adapter 54, the lower adapter 53 is fixed to the grounding drive main shaft 4, and the end of the grounding switch connecting shaft 21 is rotatably connected to the upper adapter 54. When the grounding drive main shaft 4 rotates, the lower adapter 53 rotates to drive the grounding rail 52 to move, and the grounding rail 52 drives the upper adapter 54 and the grounding switch connecting shaft 21 to rotate, so that the grounding knife 23 rotates.

[0057] By setting the grounding rail 52, the lower adapter 53 drives the grounding rail 52 to move up and down in its length direction, and then drives the grounding switch connecting shaft 21 through the upper adapter 54, thereby triggering the grounding spring 22, so that the grounding knife 23 is disconnected or connected to the external cable 14, and safe grounding or disconnection of grounding is achieved. The grounding switch transmission device 3 is close to the side wall of the cabinet 1. The grounding switch transmission device 3 rotates the original large-angle connecting rod through two continuous mechanical steering conversions of the grounding rail 52, and is improved to a mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet. In the compact switch cabinet, a safe high-voltage isolation distance is still maintained, which is conducive to the miniaturization and compactness of the overall switch cabinet.

[0058] The lower adapter 53 includes a lower rotating gear 531 and a gear clamp 532. The lower rotating gear 531 is sleeved on the grounding drive main shaft 4 and rotates coaxially with the grounding drive main shaft 4. A lower rack 521 is provided at the lower end of the grounding guide rail 52. The lower rotating gear 531 and the lower rack 521 are gear-matched.

[0059] like Figure 3 and Figure 8As shown: in order to ensure that the position of the lower rotating gear 531 is always matched with the gear of the lower rack 521, two gear clamping plates 532 are set to clamp the lower rotating gear 531 respectively, and the two gear clamping plates 532 are symmetrically arranged. The bottom end of each gear clamping plate 532 is fixed to the support plate 51, and each gear clamping plate 532 is provided with a through hole 533. The two ends of the lower rotating gear 531 are respectively rotatably clamped on the two through holes 533, and positioning grooves 523 are also provided on the two side walls of the lower rack 521. The support plate 51 is also provided with two symmetrically arranged positioning plates 511, and the end of each positioning plate 511 rests on the corresponding positioning groove 523.

[0060] The support plate 51 is provided with a sliding groove 510 , and one side of the grounding rail 52 is slidably engaged in the sliding groove 510 . The sliding groove 510 can limit the grounding rail 52 to slide only up and down.

[0061] The upper transfer device 54 involved in the present invention includes an upper rotating gear 541 and a gear mounting plate 542. The upper rotating gear 541 is rotatably clamped on the gear mounting plate 542. The upper end side wall of the grounding guide rail 52 is provided with an upper rack 522. The upper rotating gear 541 and the upper rack 522 are gear-matched. The upper rotating gear 541 is sleeved on one end of the grounding switch connecting shaft 21.

[0062] The lower rack 521 and the lower rotating gear 531 cooperate with each other in gear transmission, and the upper rack 522 and the upper rotating gear 541 cooperate with each other in gear transmission. Through the mechanical transmission of the gears, not only can the transmission angle be more accurate, but the operation of the switch grounding knife 23 can be achieved by only rotating the grounding drive main shaft by a fixed 90 degrees or 180 degrees, thereby avoiding the problems of inaccurate existing connecting rod transmission methods and no fixed rotation angle. In addition, the gear transmission has high transmission efficiency, which is more labor-saving than the principle that the existing connecting rod requires a lever. The overall control method through the two gear transmissions is more accurate, labor-saving and reliable.

[0063] like Figure 8-9 As shown: In order to stably fix the upper rotating gear 541 and the upper rack 522, the two ends of the gear mounting plate 542 are fixed to the support plate 51 by screws 543, and an upper limit groove 540 is provided on the side of the top of the grounding guide rail 52 away from the upper rotating gear 541, and a limit wheel 544 is provided on the screw 543 close to the limit groove 540, and the limit wheel 544 is rotatably clamped on the upper limit groove 540.

[0064] The positioning groove 523 and the upper limit groove 540 can limit the moving direction and the vertical moving distance of the grounding rail 52, thereby improving accuracy and safety.

[0065] In summary: the switch cabinet designed by the present invention, the grounding switch transmission device is based on gear transmission, and the original three-dimensional transmission is transformed into a plane lifting gear transmission. Under the premise of ensuring a safe spacing distance, the volume of the entire switch cabinet is further reduced and compact, which can save switch cabinet space and materials and reduce costs.

[0066] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A compact switch cabinet with an earthing switch transmission device, characterized in that: include: A cabinet (1), the cabinet (1) being divided into a busbar chamber (11), a trolley chamber (12) and a cable chamber (13) by a detachable metal partition, wherein an external cable (14) and an insulating assembly (15) are arranged in the cable chamber (13); A grounding switch assembly (2), the grounding switch assembly (2) being fixed in a cable chamber (13), the grounding switch assembly (2) comprising a grounding switch coupling (21), a grounding spring (22) and a grounding knife (23), one end of the grounding knife (23) being fixed on the grounding switch coupling (21), the grounding switch coupling (21) rotating to drive the grounding knife (23), so that the grounding knife (23) is connected to or separated from the external cable (14); An earthing switch transmission assembly (3) comprises an earthing drive main shaft (4) and an earthing switch transmission device (5), wherein the earthing drive main shaft (4) sequentially passes through a trolley chamber (12) and a cable chamber (13), and a rotating drive member (41) is provided at one end of the earthing drive main shaft (4) located in the trolley chamber (12). The earthing switch transmission device (5) and the earthing drive main shaft (4) are rotationally matched, and one end of the earthing switch coupling shaft (21) is rotationally fixed to the earthing switch transmission device (5); The end of the grounding drive main shaft (4) close to the grounding switch transmission assembly (3) is also connected to a rear door interlock device (6), and the rear door interlock device (6) comprises a rear door lock handle (61) and a rear door lock connecting rod (62), and the door lock connecting rod (62) is provided with a limit slot (621). The end of the grounding drive main shaft (4) close to the limit slot (621) is connected to a grounding fan-shaped positioning plate (63), and when the grounding drive main shaft (4) rotates to drive the grounding fan-shaped positioning plate (63) to abut against the limit slot (621), the rear door lock handle (61) can be rotated; The grounding drive spindle (4) and the rear door interlock device (6) are synchronously connected. The rear door can be opened by the rear door lock handle (61) only after the grounding drive spindle (4) rotates and the grounding knife (23) is connected to the external cable (14), and the entire circuit is grounded, that is, after the grounding fan-shaped positioning plate (63) is engaged with the limit card slot (621).

2. The compact switch cabinet with earthing switch transmission device according to claim 1, characterized in that: The grounding switch transmission device (5) comprises a support plate (51) and a grounding rail (52), wherein the support plate (51) is fixed on the side wall of the cable chamber (13), the lower end of the grounding rail (52) is rotatably connected to a lower transfer device (53), the upper end of the grounding rail (52) is connected to an upper transfer device (54), the lower transfer device (53) is fixed to the grounding drive main shaft (4), and the end of the grounding switch connecting shaft (21) is rotatably connected to the upper transfer device (54), when the grounding drive main shaft (4) rotates, the lower transfer device (53) rotates to drive the grounding rail (52) to move, and the grounding rail (52) drives the upper transfer device (54) and the grounding switch connecting shaft (21) to rotate, so that the grounding knife (23) rotates.

3. The compact switch cabinet with earthing switch transmission device according to claim 2, characterized in that: The lower transfer device (53) comprises a lower rotating gear (531) and a gear clamping plate (532); the lower rotating gear (531) is sleeved on the grounding drive main shaft (4) and rotates coaxially with the grounding drive main shaft (4); a lower rack (521) is provided at the lower end of the grounding guide rail (52); the lower rotating gear (531) and the lower rack (521) are gear-matched.

4. The compact switch cabinet with earthing switch transmission device according to claim 3, characterized in that: The gear clamping plates (532) are provided in two numbers, the bottom end of each gear clamping plate (532) is fixed on the support plate (51), each gear clamping plate (532) is provided with a through hole (533), and the two ends of the lower rotating gear (531) are respectively rotatably clamped on the two through holes (533).

5. The compact switch cabinet with earthing switch transmission device according to claim 4, characterized in that: Positioning grooves (523) are also provided on both side walls of the lower rack (521), and two symmetrically arranged positioning plates (511) are also provided on the support plate (51), with the end of each positioning plate (511) resting against the corresponding positioning groove (523).

6. The compact switch cabinet with earthing switch transmission device according to claim 5, characterized in that: The support plate (51) is provided with a sliding groove (510), and one side of the grounding rail (52) is slidably engaged in the sliding groove (510).

7. The compact switch cabinet with earthing switch transmission device according to claim 2, characterized in that: The upper transfer device (54) comprises an upper rotating gear (541) and a gear mounting plate (542); the upper rotating gear (541) is rotatably clamped on the gear mounting plate (542); an upper rack (522) is provided on the upper side wall of the grounding guide rail (52); the upper rotating gear (541) and the upper rack (522) are gear-matched; the upper rotating gear (541) is sleeved on one end of the grounding switch connecting shaft (21).

8. The compact switch cabinet with earthing switch transmission device according to claim 7, characterized in that: The two ends of the gear mounting plate (542) are fixed to the support plate (51) by means of screws (543); an upper limit slot (540) is provided on the top of the grounding rail (52) on a side away from the upper rotating gear (541); a limit wheel (544) is provided on the screw (543) close to the limit slot (540); and the limit wheel (544) is rotatably engaged with the upper limit slot (540).

9. The compact switch cabinet with earthing switch transmission device according to claim 1, characterized in that: A grounding opening and closing indicator (42) is also provided at one end of the grounding drive main shaft (4) close to the rotating drive member (41), and an opening indicator mark and a closing indicator mark are applied to the grounding opening and closing indicator (42).

Images