A rear door interlocking mechanism for 35KV armored metal AC switchgear

Abstract

The present invention is applicable to the field of self-locking switches, and provides a rear door interlocking mechanism for a 35KV armored metal AC switchgear, including a containing box installed on a cabinet, a rear door rotatably installed on the cabinet, and a plug plate that penetrates the containing box and can move forward and backward; the plug plate includes a connecting shaft and a wide plate connected thereto and extending downward; a hook plate and two connecting rods located below the hook plate and supporting the hook plate are hinged on the rear door; a containing bin is provided in the rear door, and a driving device for driving the two connecting rods to move is installed in the containing bin. Thus, the present invention can use the two connecting rods at the "dead point" to support the hook plate to maintain the working state. When the rear door needs to be opened urgently, the driving mechanism is used to drive the two connecting rods to avoid the "dead point" state, so that the rotating hook plate cancels the cooperation with the wide plate, and the rapid emergency opening of the rear door is realized.

Description

Technical Field

[0001] The invention relates to the field of self-locking switches, and in particular to a rear door interlocking mechanism for a 35KV armored metal AC switch device. Background Art

[0002] When the high-voltage cabinet is under maintenance, the grounding switch needs to be switched to the closed state before the cabinet door is opened; when the grounding switch needs to be switched to the open state, the cabinet door of the high-voltage cabinet must be in the closed state to ensure the safety of the staff and equipment; however, in the actual operation process, the staff are often careless and mistakenly switch the grounding switch to the open state before the rear cabinet door of the cable room is closed, which is extremely dangerous and seriously threatens the life safety of the staff.

[0003] After the rear door self-locking mechanism in the prior art is locked, in case of an emergency, when the rear door needs to be opened urgently in the locked state, the fastening pin used to fasten the hook plate to the rear door is generally removed, and the hook plate falls and cancels the cooperation with the plug plate. However, this will cause two problems: first, it takes a lot of effort to remove the fastening pin, which is inconvenient. Second, the hook plate will get stuck when it falls, resulting in the hook plate and the plug plate being unable to be completely separated, and ultimately causing the rear door to be unable to be opened urgently.

[0004] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0005] In view of the above-mentioned defects, the purpose of the present invention is to provide a rear door interlocking mechanism for a 35KV armored metal AC switchgear, which can utilize two connecting rods at the "dead point" to support the hook plate to maintain a working state. When the rear door needs to be opened urgently, the driving mechanism is utilized to drive the two connecting rods to avoid the "dead point" state, so that the rotating hook plate cancels the cooperation with the wide plate, thereby realizing the rapid emergency opening of the rear door.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a rear door interlocking mechanism of a 35KV armored metal AC switchgear, comprising a accommodating box installed on a cabinet, a rear door rotatably installed on the cabinet, and a plug plate that penetrates the accommodating box and can move forward and backward; the plug plate comprises a connecting shaft and a wide plate connected thereto and extending downward; the hinge on the rear door is provided with a hook plate that can switch between a mating state and a canceling state, and two connecting rods that are located below the hook plate and support the hook plate; a accommodating bin is provided in the rear door, and a driving device that drives the two connecting rods from the mating state to the canceling state is installed in the accommodating bin; the hook plate in the mating state is in a horizontal state and can be mated with the plug plate, and the two connecting rods are in the same straight line; the hook plate in the canceling state is rotated downward by a predetermined angle, and the hook plate in this state cannot be mated with the hook plate, and a predetermined angle is formed between the two connecting rods.

[0007] According to the rear door interlocking mechanism of the 35KV armored metal AC switchgear of the present invention, the driving device includes a dial wheel rotatably installed in the accommodating compartment, and two levers are provided on the dial wheel, one of which is against the connecting rod, and the other is connected to an emergency dial member capable of driving the dial wheel to rotate; a handle for driving the rear door to rotate is installed on one side of the accommodating compartment; the emergency dial member includes a rotating wheel portion rotatably installed in the handle and a driving rod portion extending upward; the outer edge of the rotating wheel portion is provided with a protrusion capable of cooperating with the lever, and the driving rod portion is fixed to the side wall of the handle by a locking structure.

[0008] According to the rear door interlocking mechanism of the 35KV armored metal AC switchgear of the present invention, the locking structure comprises a positioning hole provided on the driving rod portion and a positioning pin installed in the positioning hole;

[0009] The positioning pin passes through the handle side wall and extends outside the handle.

[0010] According to the rear door interlocking mechanism of the 35KV armored metal AC switchgear of the present invention, the rotating parts of the thumbwheel and the emergency thumbwheel are both provided with torsion springs for resetting the driving member.

[0011] According to the rear door interlocking mechanism of the 35KV armored metal AC switchgear of the present invention, a starting mechanism for preventing the positioning pin from being accidentally pulled out is installed in the accommodating compartment; the starting mechanism comprises a sleeve arranged horizontally in the accommodating compartment and a positioning rod installed in the sleeve; an inwardly recessed positioning groove is provided on the side wall of the positioning pin; one end of the positioning rod is an annular structure capable of cooperating with the positioning groove, and the other end can abut against the wide plate; a spring is provided between the sleeve and the positioning rod to provide a pre-tightening force to the positioning rod.

[0012] The present invention provides a rear door interlocking mechanism of a 35KV armored metal AC switchgear, comprising a containing box installed on a cabinet, a rear door rotatably installed on the cabinet, and a plug plate that penetrates the containing box and can move forward and backward; the plug plate comprises a connecting shaft and a wide plate and a narrow plate connected thereto and extending downward; the hinge on the rear door is provided with a hook plate that can switch between a matching state and a canceling state, and two connecting rods located below the hook plate and supporting the hook plate; a containing bin is provided in the rear door, the hook plate in the matching state is in a horizontal state and can match with the plug plate, and the two connecting rods are in the same straight line; in normal operation, the hook plate is always in the matching state (the hook plate is always in the horizontal state). When the two connecting rods are in the same straight line, the two connecting rods enter the "dead point" state, and the hook plate in this state cannot change its angle. When the electric cabinet is in the power supply state, the plug plate moves so that the wide plate moves into the containing box and matches with the hook plate (the hook plate on the rear door is blocked by the wide plate, and the rear door cannot be opened). When the electric cabinet is in the maintenance state, the plug plate moves so that the narrow plate moves to the accommodating box, and the narrow plate cannot cooperate with the hook plate (due to the narrow width of the narrow plate, the hook plate cannot be hooked by the narrow plate, and the rear door can be opened normally at this time). When an emergency occurs in the electric cabinet and the rear door needs to be opened urgently, the hook plate will be driven to enter the cancellation state; the hook plate in the cancellation state rotates downward by a predetermined angle, and the hook plate in this state cannot cooperate with the hook plate, and a predetermined angle is formed between the two connecting rods. At this time, when the hook plate rotates by a predetermined angle, the hook plate cannot cooperate with the wide plate, and the hook plate after the angle change cannot be blocked by the wide plate, and the rear door can be opened. The present invention can use two connecting rods at the "dead point" to support the hook plate to maintain the working state. When the rear door needs to be opened urgently, the driving mechanism is used to drive the two connecting rods to avoid the "dead point" state, so that the rotating hook plate cancels the cooperation with the wide plate, and the rear door can be opened quickly and urgently. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a connection diagram between the accommodating box and the plug board;

[0014] Figure 2 It is a schematic diagram of the structure of the present invention;

[0015] Figure 3 yes Figure 2 A half-section view of

[0016] Figure 4 yes Figure 3 A magnified top view of part A;

[0017] Figure 5 It is a structural diagram of a ring structure;

[0018] In the figure, 1-accommodating box, 2-insertion plate, 21-wide plate, 22-narrow plate, 3-rear door, 31-handle, 4-hook plate, 51-connecting rod, 52-dial, 53-emergency dial, 511-rotating wheel part, 512-driving rod part, 513-protrusion, 514-positioning groove, 515-protrusion, 521-dial rod, 61-sleeve, 62-positioning rod, 63-spring, 64-ring structure. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0020] See also Figure 1 , Figure 2 and Figure 3 The present invention provides a rear door interlocking mechanism of a 35KV armored metal AC switchgear, which comprises a housing box 1 installed on a cabinet, a rear door 3 rotatably installed on the cabinet, and a plug plate 2 that penetrates the housing box 1 and can move forward and backward; the plug plate 2 comprises a connecting shaft and a wide plate 21 and a narrow plate 22 connected thereto and extending downward; the rear door 3 is hinged with a hook plate 4 that can switch between a mating state and a canceling state, and two connecting rods 51 located below the hook plate 4 and supporting the hook plate 4; a housing compartment is provided in the rear door 3, and the hook plate 4 in the mating state is in a horizontal state and can be mated with the plug plate 2, and the two connecting rods 51 are in the same straight line; in normal operation, the hook plate 4 is always in the mating state (the hook plate 4 is always in the horizontal state). When the two connecting rods 51 are in the same straight line, the two connecting rods 51 enter the "dead point" state, and the hook plate 4 in this state cannot change its angle.

[0021] When the electric cabinet is in the power supply state, the plug board 2 moves so that the wide board 21 moves into the receiving box 1 and cooperates with the hook board 4 (the hook board 4 on the rear door 3 is blocked by the wide board 21, and the rear door 3 cannot be opened). When the electric cabinet is in the maintenance state, the plug board 2 moves so that the narrow board 22 moves to the receiving box 1, and the narrow board 22 cannot cooperate with the hook board 4 (because the narrow board 22 is narrow, the hook board 4 cannot be hooked by the narrow board 22, and the rear door 3 can be opened normally at this time).

[0022] When an emergency occurs in the electric cabinet and the rear door 3 needs to be opened urgently, the hook plate 4 will be driven to enter the cancel state; the hook plate 4 in the cancel state rotates downward by a predetermined angle, and the hook plate 4 in this state cannot cooperate with the hook plate 4, and a predetermined angle is formed between the two connecting rods 51. At this time, when the hook plate 4 rotates by a predetermined angle, the hook plate 4 cannot cooperate with the wide plate 21, and the hook plate 4 after the angle change cannot be blocked by the wide plate 21, and the rear door 3 can be opened.

[0023] The accommodating compartment is provided with a driving device for driving the two connecting rods 51 from the matching state to the canceling state;

[0024] Since the hook plate 4 in the mating state is supported by the two connecting rods 51 in the "dead point" state, it is only necessary to drive the two connecting rods 51 to avoid the "dead point" state, and the hook plate 4 can enter the rotatable cancellation state.

[0025] The driving device includes a dial wheel 52 rotatably installed in the accommodating compartment, and two levers 521 are provided on the dial wheel 52, one of which is against the connecting rod 51, and the other is connected to an emergency dial member 53 that can drive the dial wheel 52 to rotate. When driving, the emergency dial member 53 is driven to rotate the dial wheel 52, and the rotated dial wheel 52 uses the lever 521 to push the connecting rod 51 to change its angle. When the angle of one of the connecting rods 51 changes, the two connecting rods 51 avoid the "dead point" state.

[0026] A handle 31 for driving the rear door 3 to rotate is installed on one side of the storage compartment; the emergency toggle member 53 includes a wheel portion 511 rotatably installed in the handle 31 and a driving rod portion 512 extending upward;

[0027] The outer edge of the rotating wheel portion 511 is provided with a protrusion 515 that can cooperate with the lever 521, and the driving rod portion 512 is fixed to the side wall of the handle 31 through a locking structure. When the emergency toggle member 53 is driven to move, the locking of the locking structure is first canceled, and the driving rod portion 512 is pushed to realize the rotation of the rotating wheel portion 511. The rotating rotating wheel portion 511 uses the protrusion 515 to push the dial wheel 52 to rotate (the rotating protrusion 515 pushes the lever 521 to rotate).

[0028] Preferably, the rotating part of the dial wheel 52 and the rotating wheel part 511 of the emergency dial member 53 is provided with a torsion spring (not shown in the figure) for driving the member to reset. The external force drives the rotating wheel part 511 of the emergency dial member 53 to rotate, and the rotating rotating wheel part 511 drives the dial wheel 52 to rotate. After the rotation, the dial wheel 52 and the emergency dial member 53 are reset by the torsion spring.

[0029] The locking structure includes a positioning hole provided on the driving rod 512 and a positioning pin 513 installed in the positioning hole; the positioning pin 513 penetrates the side wall of the handle 31 and extends outside the handle 31. When the locking structure is in the locked state, the driving rod 512 is locked by the positioning pin 513, and the driving rod 512 cannot be driven to rotate by external force. When the emergency toggle member 53 needs to be rotated, the positioning pin 513 is pulled out, and the driving rod 512 is in a toggleable state.

[0030] See also Figure 3 , Figure 4 and Figure 5 , a starting mechanism is installed in the storage compartment to prevent the positioning pin 513 from being pulled out by mistake; the starting mechanism includes a sleeve 61 arranged horizontally in the storage compartment and a positioning rod 62 installed in the sleeve 61, and the positioning rod 62 can move along the axial direction of the sleeve 61; a positioning groove 514 is provided on the side wall of the positioning pin 513; one end of the positioning rod 62 is an annular structure 64 that can cooperate with the positioning groove 514 (the inner edge of one side of the annular structure 64 can be inserted into the positioning groove 514), and the other end can be against the wide plate 21; a spring 63 that provides pre-tightening force to the positioning rod 62 is provided between the sleeve 61 and the positioning rod 62. When the positioning rod 62 can achieve that the positioning pin 513 cannot be pulled out when the rear door 3 is in the open state, and the positioning pin 513 can be pulled out when the electric cabinet is in the power supply state.

[0031] When the electrical cabinet is in the power supply state, the wide plate 21 cooperates with the positioning rod 62 (the wide plate 21 pushes the positioning rod 62 to move to the left), and the annular structure moving to the left cancels the cooperation with the positioning groove 514 (at this time, the positioning pin 513 is completely placed inside the annular structure and the inner edge of one side of the annular structure cannot be inserted into the positioning groove 514). At this time, the positioning pin 513 can be pulled out.

[0032] When in the inspection state, the wide plate 21 cannot cooperate with the positioning rod 62. Under the pushing action of the spring 63, the positioning rod 62 is at the right end position. At this time, the inner edge of one side of the annular structure cannot be inserted into the positioning groove 514, and the positioning pin 513 cannot be pulled out. Since the rear door 3 is in the inspection state and can be opened, there is no need to pull out the positioning pin 513 for emergency start.

[0033] In this instance, when the backdoor needs to be activated urgently;

[0034] First, the positioning pin 513 is pulled out, and the emergency toggle member is in an active state;

[0035] Then, the external force drives the emergency toggle 53 to rotate, and the rotating emergency toggle 53 drives the dial wheel 52 to rotate, and the dial wheel 52 drives the two connecting rods 51 to avoid the "dead point" state, and then continues to drive the hook plate 4 to rotate downward. The rotating hook plate 4 cancels the cooperation with the wide plate 21, and the rear door can be opened.

[0036] In summary, the present invention provides a rear door interlocking mechanism of a 35KV armored metal AC switchgear, including a accommodating box installed on a cabinet, a rear door rotatably installed on the cabinet, and a plug plate that penetrates the accommodating box and can move forward and backward; the plug plate includes a connecting shaft and a wide plate and a narrow plate connected thereto and extending downward; the hinge on the rear door is equipped with a hook plate that can switch between a matching state and a canceling state, and two connecting rods located below the hook plate and supporting the hook plate; a accommodating bin is provided in the rear door, the hook plate in the matching state is in a horizontal state and can match with the plug plate, and the two connecting rods are in the same straight line; in normal operation, the hook plate is always in the matching state (the hook plate is always in a horizontal state). When the two connecting rods are in the same straight line, the two connecting rods enter the "dead point" state, and the hook plate in this state cannot change its angle. When the electric cabinet is in the power supply state, the plug plate moves so that the wide plate moves into the accommodating box and matches with the hook plate (the hook plate on the rear door is blocked by the wide plate, and the rear door cannot be opened). When the electric cabinet is in the maintenance state, the plug plate moves so that the narrow plate moves to the accommodating box, and the narrow plate cannot cooperate with the hook plate (due to the narrow width of the narrow plate, the hook plate cannot be hooked by the narrow plate, and the rear door can be opened normally at this time). When an emergency occurs in the electric cabinet and the rear door needs to be opened urgently, the hook plate will be driven to enter the cancellation state; the hook plate in the cancellation state rotates downward by a predetermined angle, and the hook plate in this state cannot cooperate with the hook plate, and a predetermined angle is formed between the two connecting rods. At this time, when the hook plate rotates by a predetermined angle, the hook plate cannot cooperate with the wide plate, and the hook plate after the angle change cannot be blocked by the wide plate, and the rear door can be opened. The present invention can use two connecting rods at the "dead point" to support the hook plate to maintain the working state. When the rear door needs to be opened urgently, the driving mechanism is used to drive the two connecting rods to avoid the "dead point" state, so that the rotating hook plate cancels the cooperation with the wide plate, and the rear door can be opened quickly and urgently.

[0037] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A rear door interlocking mechanism for a 35KV armored metal AC switchgear. It is characterized in that It includes a containing box installed on the cabinet, a rear door rotatably installed on the cabinet, and a plug board that penetrates the containing box and can move forward and backward; the plug board includes a connecting shaft and a wide board connected to the connecting shaft and extending downward; The hinge on the rear door is equipped with a hook plate that can switch between a mating state and a canceling state and two connecting rods located below the hook plate and supporting the hook plate; a storage bin is provided in the rear door, and a driving device for driving the two connecting rods from the mating state to the canceling state is installed in the storage bin; The hook plate in the mating state is in a horizontal state and can be mated with the plug plate, and the two connecting rods are in the same straight line; the hook plate in the canceling state is rotated downward by a predetermined angle, and the hook plate in this state cannot be mated with the hook plate, and a predetermined angle is formed between the two connecting rods; the driving device includes a dial wheel rotatably mounted in the accommodating compartment, and the dial wheel is provided with two levers, one of which is against the connecting rod, and the other is connected to an emergency dial member that can drive the dial wheel to rotate; A handle for driving the rear door to rotate is installed on one side of the storage compartment; the emergency toggle member includes a rotating wheel portion rotatably installed in the handle and a driving rod portion extending upward; a protrusion capable of cooperating with the toggle rod is provided on the outer edge of the rotating wheel portion, and the driving rod portion is fixed to the side wall of the handle through a locking structure; The locking structure comprises a positioning hole provided on the driving rod and a positioning pin installed in the positioning hole; the positioning pin passes through the side wall of the handle and extends outside the handle; a starting mechanism for preventing the positioning pin from being pulled out by mistake is installed in the accommodating compartment; The starting mechanism comprises a sleeve arranged horizontally in the accommodating bin and a positioning rod installed in the sleeve; a positioning groove recessed inwardly is provided on the side wall of the positioning pin; one end of the positioning rod is a ring structure capable of cooperating with the positioning groove, and the other end can abut against the wide plate; A spring is provided between the sleeve and the positioning rod to provide a pre-tightening force to the positioning rod.

2. The rear door interlocking mechanism of the 35KV armored metal AC switchgear according to claim 1, It is characterized in that The rotating parts of the dial wheel and the emergency dial part are both provided with torsion springs for driving the components to reset.

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