High-voltage switch cabinet

Abstract

The utility model belongs to the technical field of high-voltage power distribution equipment, and particularly relates to a high-voltage switch cabinet, which comprises a cabinet body and a switch trolley, the switch trolley comprises a trolley main body, a support frame is arranged on the upper surface of the trolley main body, a vacuum circuit breaker is arranged on the support frame, and a contact of the vacuum circuit breaker is a duckbilled contact. According to the utility model, an original low-oil circuit breaker is replaced by the vacuum circuit breaker, so that the defects of failure and potential safety hazards such as failure, difficult closing, high contact resistance of the circuit breaker and the like, high regular maintenance cost and the like in daily operation of the low-oil circuit breaker are overcome; the duckbilled contact is made of a thick conductive material, so that the conductive sectional area of the duckbilled contact is increased, the duckbilled contact can bear larger current in the operation process, and the overcurrent capability during short circuit is improved, so that the possibility of fusion welding under the condition of serious short circuit and overcurrent is reduced, the stability of the contact is improved, and the service life of the contact is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high voltage distribution equipment technical field, specifically related to a high voltage switch cabinet. BACKGROUND

[0002] In the high voltage substation of a chemical of my group, there are 60 switch cabinets, and the load mainly has 15 transformers, 40 high voltage motors, the high voltage motors are different in size, and the control start-stop mode is different. The original full set of high voltage circuit breaker and high voltage cabinet produced in the 1980s, the high voltage circuit breaker adopts a small oil circuit breaker, this small oil circuit breaker often occurs in daily operation, and the closing difficulty and other faults, and the high voltage small oil circuit breaker needs regular maintenance, with the wide application of vacuum circuit breaker, it is urgent to eliminate this type of circuit breaker, in addition, when this circuit breaker runs for a long time or the load capacity is large, it is very easy to affect the safe and stable operation of the system, and the parts of this circuit breaker are difficult to find, the mechanism is complex, and it is difficult to handle the fault, time-consuming and laborious. INVENTION CONTENTS

[0003] The utility model provides a high voltage switch cabinet for above -mentioned problem.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A kind of high voltage switch cabinet, including cabinet and switch trolley, the switch trolley includes trolley main body, support frame is installed on the upper surface of the trolley main body, vacuum circuit breaker is installed on the support frame, and the contact of the vacuum circuit breaker is duckbill type contact.

[0006] Further, frame is installed on the upper surface of the trolley main body, at least two clamping slots are formed in the left and right sides of the frame, inverted L-shaped clamping plate is slidably arranged in the clamping slot, the L-shaped clamping plate is fixedly connected with front panel, the cabinet is provided with the accommodation slot for the L-shaped clamping plate on the front surface, lock catch is arranged in the middle of the left and right sides of the front panel, a first through slot is arranged on the frame for the lock catch to pass through, the cabinet is provided with lock hole corresponding to the lock catch on the front surface, lifting mechanism is installed on the front side of the upper surface of the trolley main body for controlling the lifting of front panel, the lifting mechanism is further transmissionally connected with interlocking mechanism for preventing the closing of circuit breaker when front panel is in the state of lifting, instrument box is further arranged on the support frame, and the instrument box is used to install electrical components for controlling the closing and opening of vacuum circuit breaker.

[0007] Further, the lifting mechanism comprises a rotating shaft, the front part of the rotating shaft is rotatably installed on the first fixed plate, the rear part of the rotating shaft is rotatably installed on the second fixed plate, the first fixed plate and the second fixed plate are installed on the upper surface of the trolley body, the front part of the rotating shaft is provided with a pin hole, the prying bar is inserted into the pin hole to control the rotation of the rotating shaft, a second through slot is formed in the front panel for the rotating shaft to pass through, a control rod is fixedly connected to the rear end of the rotating shaft, a third through slot is formed in the trolley body for the control rod to pass through, two limiting rods are arranged in the third through slot, the two limiting rods are respectively located on the left and right sides of the control rod, and the rotation angle of the rotating shaft is limited, a first connecting rod is fixedly connected to the rotating shaft, a second connecting rod is hingedly connected to the upper end of the first connecting rod, the upper end of the second connecting rod is hingedly connected to the front panel, and the included angle between the first connecting rod and the second connecting rod is greater than 180° when the front panel is in the raised state, so that the front panel is prevented from automatically falling down.

[0008] Further, the interlocking mechanism comprises a third connecting rod hingedly connected to the upper end of the first connecting rod, a first limiting slot is formed in the other side of the third connecting rod, a first limiting column is slidably arranged in the first limiting slot, the first limiting column is fixed to the stand, the stand is fixedly installed on the trolley body, a fourth connecting rod is hingedly connected to the middle part of the third connecting rod, a fifth connecting rod is hingedly connected to the upper end of the fourth connecting rod, the fifth connecting rod is slidably arranged in a limiting sliding groove, the limiting sliding groove is formed in a fixed block, the fixed block is fixedly installed on the side wall of the instrument box, a sixth connecting rod is fixedly connected to the upper end of the fifth connecting rod, a reset spring is fixedly connected to the lower end of the sixth connecting rod, the lower end of the reset spring is fixedly connected to the side wall of the instrument box, a horizontal sliding groove is formed in the upper part of the sixth connecting rod, a second limiting column is slidably arranged in the horizontal sliding groove, the second limiting column is fixedly connected to a seventh connecting rod, an inverted L-shaped sliding groove is formed in the upper part of the seventh connecting rod, a third limiting column is slidably arranged in the L-shaped sliding groove, the third limiting column is fixedly installed on the side wall of the instrument box, the rear side extension end of the seventh connecting rod is hingedly connected to a mechanical driving lever, the lower part of the mechanical driving lever is hingedly connected to the side wall of the instrument box, a closing coil is arranged on one side of the upper end of the mechanical driving lever, the closing coil is used for controlling the working of the mechanical driving lever, thereby realizing the closing work, and the closing coil is fixedly installed in the instrument box.

[0009] Further, a guide channel steel is fixedly arranged at the rear end of the trolley body, and a guide column corresponding to the guide channel steel is arranged at the bottom of the inner cavity of the cabinet body.

[0010] Further, a connecting column is fixedly arranged at the upper end of the second connecting rod, a threaded hole is formed in the front end surface of the connecting column, a screw is threadedly connected in the threaded hole, a through hole for the screw to pass through is formed in the front panel, and the second connecting rod is detachably connected with the front panel through the screw and the connecting column.

[0011] Further, a control sliding groove for controlling the automatic falling of the front panel is arranged on the lower surface of the inner cavity of the cabinet body, and the control sliding groove comprises a straight sliding groove for guiding a control rod and an inclined sliding groove for pushing the control rod.

[0012] Further, a pushing handle is arranged on the left and right sides of the front panel, so as to facilitate the pushing of the switch trolley.

[0013] Further, an observation window is formed in the upper portion of the front panel, and an emergency operation hole is formed in the front panel, so as to manually operate the vacuum circuit breaker in an emergency state.

[0014] Further, the lock catch comprises a lock column, the lock column is slidingly arranged on the front panel, a limiting ring is arranged on the lock column, a compression spring is arranged between the limiting ring and the front panel, the compression spring is sleeved on the lock column, and the front end of the lock column is hingedly connected with the middle portion of the control handle through the front panel.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The original low-oil circuit breaker is replaced by the vacuum circuit breaker, the disadvantages of the low-oil circuit breaker, such as frequent operation, difficult closing, high contact resistance and other fault safety hazards and high periodic maintenance cost, are solved, meanwhile, the contact of the vacuum circuit breaker adopts the duckbill contact, the thick conductive material of the duckbill contact increases the conductive cross-sectional area, the duckbill contact can bear larger current in the operation process, the overcurrent capacity in the short circuit is improved, the possibility of welding in the case of serious short circuit overcurrent is reduced, the stability and service life of the contact are improved, meanwhile, the pressure of the contact static contact can be accurately adjusted by the crimping spring on the duckbill contact, the contact effect can be accurately adjusted during maintenance, secondly, the duckbill contact can be conveniently maintained or replaced by the equipment maintenance personnel, the work efficiency is improved, the maintenance cost and time of the equipment are reduced, and the maintenance performance of the equipment is greatly improved.

[0017] The front panel arranged in the utility model can effectively isolate the operator from the vacuum circuit breaker, prevent personal injury accidents caused by misoperation, and the observation window in front of the panel can observe the running state and running temperature of the circuit breaker at any time.

[0018] The front panel is in the raised state during the transportation process and in the falling state during the working process, so that the movement of the switch trolley is facilitated, and meanwhile, the front panel in the raised state can effectively prevent the vacuum circuit breaker from closing through the interlocking mechanism, thereby ensuring the safety of the workers.

[0019] The automatic falling of the front panel can be realized through the cooperation of the control rod and the control sliding groove, after the falling of the front panel, the switch trolley and the cabinet body can be locked through the cooperation of the control rod and the control sliding groove and the cooperation of the lock catch and the lock hole, namely, when the lock post is inserted into the lock hole, the front panel cannot be lifted and lowered, and on the basis that the front panel cannot be lifted and lowered, the control rod cannot be rotated, so that the control rod is stuck with the control sliding groove, and the switch trolley is prevented from moving out of the cabinet body. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the utility model;

[0021] Figure 2 It is a structural schematic view of the utility model without the cabinet body;

[0022] Figure 3 It is a structural schematic view of the cabinet body of the utility model;

[0023] Figure 4 It is a structural schematic view of the trolley body without the front panel of the utility model;

[0024] Figure 5 It is an installation schematic view of the lifting mechanism of the utility model;

[0025] Figure 6 It is an installation schematic view of the lifting mechanism of the utility model;

[0026] Figure 7 It is a structural schematic view of the interlocking mechanism of the utility model;

[0027] Figure 8 It is a structural schematic view of the front panel of the utility model;

[0028] Figure 9 It is a structural schematic view of the lock catch of the utility model;

[0029] Figure 10 It is a connection schematic view of the first connecting rod and the second connecting rod when the front panel of the utility model is in the raised state;

[0030] Figure 11 It is a connection schematic view of the first connecting rod and the second connecting rod when the front panel of the utility model is in the falling state;

[0031] Figure 12 It is a state view of the control rod in the straight sliding groove;

[0032] Figure 13 The state diagram of the control lever in the inclined sliding groove is shown in the utility model;

[0033] In the figure, cabinet body 1, trolley main body 2, support frame 3, vacuum circuit breaker 4, frame 5, clamping groove 6, L-shaped clamping plate 7, front panel 8, give way slot 9, lock catch 10, first through slot 11, lock hole 12, instrument box 13, rotating shaft 14, first fixed plate 15, second fixed plate 16, pin hole 17, second through slot 18, control lever 19, third through slot 20, limiting rod 21, first connecting rod 22, second connecting rod 23, third connecting rod 24, first limiting slot 25, first limiting column 26, stand column 27, fourth connecting rod 28, fifth connecting rod 29, limiting sliding groove 30, fixed block 31, sixth connecting rod 32, reset spring 33, transverse sliding groove 34, second limiting column 35, seventh connecting rod 36, L-shaped sliding groove 37, third limiting column 38, mechanical pushing lever 39, closing coil 40, guide channel steel 41, guide column 42, connecting column 43, screw 44, fourth through slot 45, control sliding groove 46, pushing handle 47, observation window 48, emergency operation hole 49, lock column 1001, limiting ring 1002, compression spring 1003, control handle 1004. DETAILED DESCRIPTION

[0034] In order to further illustrate the technical scheme of the utility model, the utility model will be further described through examples below.

[0035] As Figures 1 to 13As shown, a high-voltage switch cabinet includes a cabinet body 1 and a switch trolley, the switch trolley includes a trolley body 2, a support frame 3 is installed on the upper surface of the trolley body 2, a vacuum circuit breaker 4 is installed on the support frame 3, the contact of the vacuum circuit breaker 4 is a duckbill contact, a frame 5 is installed on the front surface of the trolley body 2, at least two clamping grooves 6 are formed on the left and right sides of the frame 5, an inverted L-shaped clamping plate 7 is slidably arranged in the clamping groove 6, the L-shaped clamping plate 7 is fixedly connected with a front panel 8, a push handle 47 is arranged on the left and right sides of the front panel 8 to facilitate pushing the switch trolley to move, an observation window 48 is formed on the upper part of the front panel 8 to observe the working condition of the vacuum circuit breaker 4, an emergency operation hole 49 is formed on the front panel 8 to manually operate the vacuum circuit breaker 4 in an emergency state, a clearance groove 9 is arranged on the front surface of the cabinet body 1 to provide a clearance for the L-shaped clamping plate 7, a lock catch 10 is arranged on the middle part of the left and right sides of the front panel 8, a first through groove 11 is arranged on the frame 5 for the lock catch 10 to pass through, a lock hole 12 corresponding to the lock catch 10 is arranged on the front surface of the cabinet body 1, a lifting mechanism is installed on the front side of the upper surface of the trolley body 2 to control the lifting of the front panel 8, the lifting mechanism is further connected with an interlocking mechanism to prevent the circuit breaker from closing when the front panel 8 is lifted, an instrument box 13 is further arranged on the support frame 3, the instrument box 13 is used to install electrical elements for controlling the closing and opening of the vacuum circuit breaker 4. A guide channel steel 41 is fixedly arranged at the rear end of the trolley body 2, a guide column 42 corresponding to the guide channel steel 41 is arranged at the bottom of the inner cavity of the cabinet body 1,

[0036] The lifting mechanism comprises a rotating shaft 14, the front part of the rotating shaft 14 is rotatably installed on a first fixed plate 15, the rear part of the rotating shaft 14 is rotatably installed on a second fixed plate 16, the first fixed plate 15 and the second fixed plate 16 are installed on the upper surface of the trolley main body 2, the front part of the rotating shaft 14 is provided with a pin hole 17 penetrating through the front panel 8, the rotating shaft 14 is controlled to rotate by inserting a crowbar into the pin hole 17, a second through slot 18 for the rotating shaft 14 to penetrate through is formed on the front panel 8, a control rod 19 is fixedly connected to the rear end of the rotating shaft 14, a third through slot 20 for the control rod 19 to penetrate through is formed on the trolley main body 2, two limiting rods 21 are arranged in the third through slot 20, the two limiting rods 21 are respectively located on the left and right sides of the control rod 19, and the limiting rods 21 are used for limiting the rotation angle of the rotating shaft 14, a control sliding groove 46 for controlling the automatic falling of the front panel 8 is arranged on the lower surface of the inner cavity of the cabinet body 1, the control sliding groove 46 comprises a straight sliding groove for guiding the control rod 19 and an inclined sliding groove for pushing the control rod 19, a first connecting rod 22 is fixedly connected to the rotating shaft 14, a second connecting rod 23 is hingedly connected to the upper end of the first connecting rod 22, the upper end of the second connecting rod 23 is hingedly connected to the front panel 8, a connecting column 43 is fixedly arranged on the upper end of the second connecting rod 23, a threaded hole is formed on the front end surface of the connecting column 43, a screw 44 is screwedly connected to the threaded hole, a through hole is formed on the front panel 8 for the screw 44 to penetrate through, the detachable connection between the second connecting rod 23 and the front panel 8 is realized by the screw 44 and the connecting column 43, a fourth through slot 45 for the connecting column 43 to penetrate through is formed on the first fixed plate 15, when the front panel 8 is in the raised state, the included angle between the first connecting rod 22 and the second connecting rod 23 is greater than 180°, so that the front panel 8 is prevented from automatically falling.

[0037] The interlocking mechanism comprises a No. 3 connecting rod 24 hinged to the upper end of the No. 1 connecting rod 22, a No. 1 limiting slot 25 is formed in the other side of the No. 3 connecting rod 24, a No. 1 limiting column 26 is slidingly arranged in the No. 1 limiting slot 25, the No. 1 limiting column 26 is fixed on a stand 27, the stand 27 is fixedly installed on the trolley body 2, a No. 4 connecting rod 28 is hinged to the middle part of the No. 3 connecting rod 24, a No. 5 connecting rod 29 is hinged to the upper end of the No. 4 connecting rod 28, the No. 5 connecting rod 29 is slidingly arranged in a limiting sliding slot 30, the limiting sliding slot 30 is formed in a fixed block 31, the fixed block 31 is fixedly installed on the side wall of the instrument box 13, a No. 6 connecting rod 32 is fixedly connected to the upper end of the No. 5 connecting rod 29, a return spring 33 is fixedly connected to the lower end of the No. 6 connecting rod 32, the lower end of the return spring 33 is fixedly connected to the side wall of the instrument box 13, a horizontal sliding slot 34 is formed in the upper part of the No. 6 connecting rod 32, a No. 2 limiting column 35 is slidingly arranged in the horizontal sliding slot 34, the No. 2 limiting column 35 is fixedly connected with a No. 7 connecting rod 36, an inverted L-shaped sliding slot 37 is formed in the upper part of the No. 7 connecting rod 36, a No. 3 limiting column 38 is slidingly arranged in the L-shaped sliding slot 37, the No. 3 limiting column 38 is fixedly installed on the side wall of the instrument box 13, the rear side extension end of the No. 7 connecting rod 36 is hinged with a mechanical driving lever 39, the lower part of the mechanical driving lever 39 is hinged with the side wall of the instrument box 13, a closing coil 40 is arranged on one side of the upper end of the mechanical driving lever 39, for controlling the working of the mechanical driving lever 39, thereby realizing the closing work, the closing coil 40 is fixedly installed in the instrument box 13.

[0038] The lock 10 comprises a lock post 1001 slidingly arranged on the front panel 8, a limiting ring 1002 is arranged on the lock post 1001, a compression spring 1003 is arranged between the limiting ring 1002 and the front panel 8, the compression spring 1003 is sleeved on the lock post 1001, the front end of the lock post 1001 is hinged with the middle part of the control handle 1004 through the front panel 8.

[0039] The working principle of the lifting mechanism is as follows: when the front panel 8 needs to be lifted up, the crowbar is inserted into the pin hole 12, the rotating shaft 14 is counterclockwise rotated by the crowbar, when the control rod 19 touches the right limiting rod 21, it cannot be continuously rotated, at this time, the left side angle between the No. 1 connecting rod 22 and the No. 2 connecting rod 23 is greater than 180°, which can prevent the No. 1 connecting rod 22 and the No. 2 connecting rod 23 from tilting to the right side, causing the front panel 8 to fall down, at the same time, the rotating shaft 14 cannot be rotated due to the limiting of the limiting rod 21, thereby realizing the keeping of the lifting state of the front panel 8, conversely, when the front panel 8 falls down, the limiting of the control rod 19 by the left limiting rod 21 is combined with the right side angle between the No. 1 connecting rod 22 and the No. 2 connecting rod 23 being greater than 180°, thereby realizing the keeping of the falling height of the front panel 8.

[0040] The working principle of the interlocking mechanism is as follows: when the front panel 8 is lifted, the first connecting rod 22 drives the third connecting rod 24 to move right, the third connecting rod 24 drives the lower end of the fourth connecting rod 28 to move left, and in turn drives the fifth connecting rod 29, the sixth connecting rod 32 and the seventh connecting rod 36 to move up, so that the third limiting column 38 falls into the lower part of the L-shaped sliding groove 37, so that the seventh connecting rod 36 cannot move left and right. Since the seventh connecting rod 36 is hinged with the upper part of the mechanical driving rod 39, it plays a dragging effect on the mechanical driving rod 39. Even if the iron core of the closing coil 40 pushes the mechanical driving rod 39, the mechanical driving rod 39 cannot rotate. When the front panel 8 is in the falling state, the third limiting column 38 is located in the horizontal part of the L-shaped sliding groove 37, so that the seventh connecting rod 36 can move left and right, thereby releasing the interlocking of the mechanical driving rod 39.

[0041] The main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0042] In addition, it should be understood that although the present application is described in the specification, each embodiment only contains one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A high voltage switchgear comprising a cabinet (1) and a switch trolley, characterized in that: The switch trolley comprises a trolley body (2), a support frame (3) is installed on the upper surface of the trolley body (2), a vacuum circuit breaker (4) is installed on the support frame (3), and the contact of the vacuum circuit breaker (4) is a duckbill contact.

2. A high voltage switchgear according to claim 1, characterized in that: A frame (5) is installed on the front surface of the trolley body (2), at least two clamping grooves (6) are formed on the left and right sides of the frame (5), an inverted L-shaped clamping plate (7) is slidably arranged in the clamping groove (6), the L-shaped clamping plate (7) is fixedly connected with a front panel (8), a notching groove (9) for accommodating the L-shaped clamping plate (7) is arranged on the front surface of the cabinet body (1), a lock catch (10) is arranged on the middle part of the left and right sides of the front panel (8), a first through groove (11) for allowing the lock catch (10) to pass through is arranged on the frame (5), a lock hole (12) corresponding to the lock catch (10) is arranged on the front surface of the cabinet body (1), a lifting mechanism is installed on the front side of the upper surface of the trolley body (2) and is used for controlling the lifting of the front panel (8), the lifting mechanism is further transmissionally connected with an interlocking mechanism, which is used for preventing the closing of the circuit breaker when the front panel (8) is in the lifted state, and an instrument box (13) is further arranged on the support frame (3), the instrument box (13) is used for installing electrical elements for controlling the closing and opening of the vacuum circuit breaker (4).

3. A high voltage switchgear according to claim 2, characterized in that: The lifting mechanism comprises a rotating shaft (14), the front part of the rotating shaft (14) is rotationally installed on a first fixed plate (15), the rear part of the rotating shaft (14) is rotationally installed on a second fixed plate (16), the first fixed plate (15) and the second fixed plate (16) are both installed on the upper surface of the trolley body (2), the front part of the rotating shaft (14) is provided with a pin hole (17) penetrating through the front panel (8), the rotation of the rotating shaft (14) is controlled by inserting a crowbar into the pin hole (17), a second through groove (18) for allowing the rotating shaft (14) to pass through is formed on the front panel (8), a control rod (19) is fixedly connected to the rear end of the rotating shaft (14), a third through groove (20) for allowing the control rod (19) to pass through is formed on the trolley body (2), two limiting rods (21) are arranged in the third through groove (20), the two limiting rods (21) are respectively located on the left and right sides of the control rod (19) and are used for limiting the rotation angle of the rotating shaft (14), a first connecting rod (22) is fixedly connected to the rotating shaft (14), a second connecting rod (23) is hingedly connected to the upper end of the first connecting rod (22), the upper end of the second connecting rod (23) is hingedly connected with the front panel (8), when the front panel (8) is in the lifted state, the included angle between the first connecting rod (22) and the second connecting rod (23) is greater than 180°, so as to prevent the front panel (8) from automatically falling down.

4. A high voltage switchgear according to claim 3, characterized in that: The interlocking mechanism comprises a No. 3 connecting rod (24) hinged to the upper end of a No. 1 connecting rod (22), a No. 1 limiting column (26) is slidably arranged in a No. 1 limiting slot (25) formed in the other side of the No. 3 connecting rod (24), the No. 1 limiting column (26) is fixed on a vertical column (27) which is fixedly installed on the trolley body (2), a No. 4 connecting rod (28) is hinged to the middle of the No. 3 connecting rod (24), a No. 5 connecting rod (29) is slidably arranged in a limiting sliding groove (30) formed in a fixing block (31) which is fixedly installed on the side wall of the instrument box (13), a No. 6 connecting rod (32) is fixedly connected to the upper end of the No. 5 connecting rod (29), a return spring (33) is fixedly connected to the lower end of the No. 6 connecting rod (32), the lower end of the return spring (33) is fixedly connected to the side wall of the instrument box (13), a horizontal sliding groove (34) is formed in the upper part of the No. 6 connecting rod (32), a No. 2 limiting column (35) is slidably arranged in the horizontal sliding groove (34), the No. 2 limiting column (35) is fixedly connected with a No. 7 connecting rod (36), an inverted L-shaped sliding groove (37) is formed in the upper part of the No. 7 connecting rod (36), a No. 3 limiting column (38) is slidably arranged in the L-shaped sliding groove (37), the No. 3 limiting column (38) is fixedly installed on the side wall of the instrument box (13), the rear side of the No. 7 connecting rod (36) is hinged to a mechanical driving lever (39), the lower part of the mechanical driving lever (39) is hinged to the side wall of the instrument box (13), a closing coil (40) is arranged on one side of the upper end of the mechanical driving lever (39) for controlling the working of the mechanical driving lever (39) to realize the closing work, the closing coil (40) is fixedly installed in the instrument box (13).

5. A high voltage switchgear according to claim 1, characterized in that: A guide channel steel (41) is fixedly arranged at the rear end of the trolley body (2), a guide column (42) corresponding to the guide channel steel (41) is arranged at the bottom of the inner cavity of the cabinet body (1).

6. A high voltage switchgear according to claim 3, characterized in that: A connecting column (43) is fixedly arranged at the upper end of the No. 2 connecting rod (23), a threaded hole is formed in the front end face of the connecting column (43), a screw (44) is threadedly connected in the threaded hole, a through hole is formed in the front panel (8) for passing through the screw (44), the detachable connection between the No. 2 connecting rod (23) and the front panel (8) is realized through the screw (44) and the connecting column (43), a No. 4 through slot (45) is formed in the No. 1 fixing plate (15) for passing through the connecting column (43).

7. A high voltage switchgear according to claim 3, characterized in that: A control sliding groove (46) for controlling the automatic falling of the front panel (8) is arranged on the lower surface of the inner cavity of the cabinet body (1), the control sliding groove (46) comprises a straight sliding groove for guiding the control lever (19) and an inclined sliding groove for driving the control lever (19).

8. A high voltage switchgear according to claim 2, characterized in that: Pushing handles (47) are arranged on the left and right sides of the front panel (8) to facilitate the pushing of the switch trolley.

9. A high voltage switchgear according to claim 2, characterized in that: An observation window (48) is formed in the upper portion of the front panel (8) for observing the working condition of the vacuum circuit breaker (4), and an emergency operation hole (49) is formed in the front panel (8) for manually operating the vacuum circuit breaker (4) in an emergency state.

10. A high voltage switchgear according to claim 2, characterized in that: The lock catch (10) comprises a lock column (1001) which is slidingly arranged on the front panel (8), a limiting ring (1002) is arranged on the lock column (1001), a compression spring (1003) is arranged between the limiting ring (1002) and the front panel (8), the compression spring (1003) is sleeved on the lock column (1001), and the front end of the lock column (1001) is hingedly connected with the middle portion of the control handle (1004) penetrating through the front panel (8).

Images