Interlocking device of rear sealing plate of switch cabinet

Abstract

The utility model relates to the field of power distribution switch cabinets, in particular to an interlocking device for a rear sealing plate of a switch cabinet, which comprises a fixing hook and a hook plate, the fixing hook is fixedly arranged on one side, facing the inside of the switch cabinet, of the rear sealing plate, the hook plate is arranged in the switch cabinet through a mounting plate, an interlocking rod is arranged on the hook plate, and the interlocking rod is connected with the fixing hook. The interlocking rod is in linkage connection with a grounding switch, the grounding switch is turned on and off to drive the interlocking rod to act, and the interlocking rod acts, so that the hook plate and the fixed hook can be switched between a buckled state and a separated state; the interlocking rod is in linkage connection with the grounding switch in the switch cabinet, the grounding switch is switched off, the interlocking rod drives the hook plate to be buckled with the fixing hook all the time, and it is guaranteed that the rear sealing plate is closed all the time. When the grounding switch is switched on, the cable interval is in a non-power state, the interlocking rod enables the hook plate to be separated from the fixing hook, the whole device is easy to install and produce, operation is simple and reliable, safety interlocking can be well achieved, and mistaken opening of the rear sealing plate is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of power distribution switch cabinets, and specifically provides an interlocking device for a rear sealing plate of a switch cabinet. Background Art

[0002] High-voltage metal switchgear equipment is a three-phase AC indoor complete set of power distribution equipment, which is used to receive and distribute kilovolt network power, and control, protect and monitor it. Metal-enclosed switchgear equipment should have a complete five-protection interlocking "anti-error" and backup electrical interlocking. However, in some special projects, prefabricated warehouses and some plate-type structures, the rear sealing plate cannot be mechanically interlocked, but is directly fixed with bolts, and has no connection with any parts (components) in the cabinet. It is easy to cause the rear sealing plate to be opened by mistake, and there is a risk of accidentally entering the live interval. It cannot meet the requirement of "preventing accidental entry into the live interval" in the five-protection. For this reason, an interlocking device using the rear sealing plate of the switchgear is proposed. Utility Model Content

[0003] The utility model provides an interlocking device for a rear sealing plate of a switch cabinet, which interlocks the action of a grounding switch and ensures the closing of the rear sealing plate when the grounding switch is opened, thereby achieving the requirement of "preventing accidental entry into a live interval".

[0004] The technical solution of the utility model is as follows:

[0005] An interlocking device for a rear cover plate of a switch cabinet comprises a fixing hook and a hook plate, wherein the fixing hook is fixedly arranged on a side of the rear cover plate facing the interior of the switch cabinet, and the hook plate is arranged in the switch cabinet through a mounting plate, and an interlocking rod is arranged on the hook plate, and the interlocking rod is linked to a grounding switch. When the grounding switch is opened and closed, the interlocking rod is driven to move, and the movement of the interlocking rod causes the hook plate and the fixing hook to switch between a buckled state and a separated state.

[0006] In this solution, the interlocking rod is linked to the grounding switch in the switch cabinet. When the grounding switch is opened, the interlocking rod drives the hook plate to always be connected with the fixed hook to ensure that the rear cover is always closed. When the grounding switch is closed, the cable compartment is de-energized, and the interlocking rod separates the hook plate from the fixed hook to open the rear cover, realizing safety interlocking.

[0007] Preferably, the hook plate is rotatably arranged on the interlocking rod, a stopper is arranged on the mounting plate, the opening and closing of the grounding switch is linked to the telescopic action of the interlocking rod, and the interlocking rod pulls the hook plate to make the hook plate contact the stopper and rotate the hook plate.

[0008] In this scheme, the interlocking rod extends when the grounding switch is closed, and retracts when the grounding switch is opened. When the interlocking rod is retracted, the interlocking rod drives the hook plate to move, and one side of the hook plate is resisted by the block. The hook plate rotates on the interlocking rod under force, and the hook teeth of the hook plate are just engaged with the hook teeth of the fixed hook, ensuring the closure of the rear sealing plate and avoiding the accidental opening of the rear sealing plate when the cable interval is connected. At the same time, because the block continuously gives the hook plate a rotational force, the reliable connection between the hook plate and the fixed hook is effectively ensured.

[0009] Preferably, a through slot block is fixedly arranged on the mounting plate, and the interlocking rod is slidably arranged in the through slot block. The sliding direction of the interlocking rod is fixed to ensure the stable sliding of the interlocking rod.

[0010] Generally, the rear sealing plate interlocking mechanism is close to the rear sealing plate, and is far away from the grounding switch in the cabinet. Since the actions of the two are linked only by the interlocking rod, a safety structure is provided to avoid failure of the linkage. A tension spring is provided between the through slot block and the interlocking rod. The tension spring provides a force to the interlocking rod to move away from the fixed hook. When the linkage connection fails, the interlocking rod can be retracted under the linkage of the grounding switch, thereby ensuring the buckling of the hook plate and the fixed hook, thereby avoiding accidental start-up of the rear sealing plate.

[0011] Preferably, the fixing hook comprises a hook body and a hook body mounting portion, the hook body mounting portion is fixedly arranged on a surface of the rear sealing plate facing away from the interior of the switch cabinet, the hook body is detachably connected to the hook body mounting portion, and the hook body extends from outside the rear sealing plate into the switch cabinet.

[0012] In this solution, the fixed hook is divided into two parts, which is convenient for installation and can also correspond to the position of the mounting plate of the hook plate when it is installed; at the same time, when the linkage between the interlocking rod and the grounding switch fails, the hook body of the fixed hook can be removed through the hook body mounting plate outside the rear sealing plate, and the contact and hook plate are buckled, so that the rear sealing plate can be opened smoothly.

[0013] Preferably, the interlocking rod includes a first part and a second part, the first part is linked to the grounding switch, the second part is provided with a sliding hole, the first part is slidably arranged in the sliding hole, a closing end is provided at the opening of the sliding hole to prevent the first part and the second part from being separated, and a second elastic component is provided in the sliding hole, and the second elastic component abuts against the first part.

[0014] In this scheme, in order to cope with the associated structures of grounding switches with different travels of different switch cabinets, the interlocking rod is provided with two sections of sliding connection. When the grounding switch is closed, the first part of the interlocking rod extends forward, so that the second elastic member abuts against the second part, and the second part drives the hook plate to rotate for separation. At the same time, when the separation action is completed but the first part continues to extend forward, the second elastic member is compressed, which plays a certain buffering role, avoiding the second part from abutting against the fixed hook, and also avoiding damage to the hook plate structure or the associated structure of the interlocking rod and the grounding switch. It should be noted that when the grounding switch is opened, the first part of the interlocking rod abuts against the closing of the sliding hole of the second part, and has moved the second part to the required formation, ensuring the buckling of the hook plate and the fixed plate.

[0015] Preferably, a positioning hole is provided on the rear sealing plate, and the positioning hole includes two connected parts of small aperture and large aperture, a latch is fixedly provided on the mounting plate, the small aperture of the positioning hole is larger than the rod diameter of the latch and smaller than the head diameter of the latch, and the large aperture of the positioning hole is larger than the head diameter of the latch, and when the rear sealing plate is closed, the head of the latch extends into the rear sealing plate and out of the positioning hole; when the hook plate is buckled with the fixed hook, the rod portion of the latch is located at the small aperture portion of the positioning hole.

[0016] In this solution, the freedom of the rear sealing plate is completely limited by double locking of the latch and the hook plate. When the rear sealing plate needs to be opened, in addition to releasing the lock between the hook plate and the fixed hook, the rear sealing plate needs to be translated so that the rod of the latch on the rear sealing plate is located at the positioning hole with a large aperture, so that the head of the latch can pass through the positioning hole, thereby releasing the latch from positioning the rear sealing plate, and then opening the rear sealing plate. This double-limited rear sealing plate structure can effectively ensure the perfect five-prevention measures and avoid accidental opening of the rear sealing plate.

[0017] Beneficial effects of the utility model:

[0018] The utility model is linked to the grounding switch in the switch cabinet through an interlocking rod. When the grounding switch is opened, the interlocking rod drives the hook plate to always be connected with the fixed hook to ensure that the rear sealing plate is always closed. When the grounding switch is closed, the cable interval is in a powerless state, and the interlocking rod separates the hook plate from the fixed hook. At the same time, the rear sealing plate needs to be translated to release the limit of the rear sealing plate by the latch before the rear sealing plate can be opened; the entire device structure is easy to install and produce, simple and reliable to operate, can well realize safety interlocking, and effectively avoid the accidental opening of the rear sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the buckling of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the interlocking rod of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the latch limiter of the utility model.

[0024] In the above drawings, the corresponding reference numerals are as follows:

[0025] 1-fixed hook, 11-hook body, 12-hook body mounting part, 13-cover plate, 14-bolt, 2-hook plate, 3-rear sealing plate, 31-positioning hole, 4-mounting plate, 5-interlocking rod, 51-first part, 52-second part, 53-second elastic member, 54-sliding hole, 6-stop block, 7-through slot block, 8-latch pin. DETAILED DESCRIPTION

[0026] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through the specific implementation methods of the embodiments of the present invention.

[0027] Embodiment 1:

[0028] like Figures 1 to 3 An interlocking device for a rear cover plate 3 of a switch cabinet is shown, comprising a fixing hook 1 and a hook plate 2, wherein the fixing hook 1 is fixedly arranged on a side of the rear cover plate 3 facing the inside of the switch cabinet, and the hook plate 2 is arranged in the switch cabinet through a mounting plate 4, and an interlocking rod 5 is arranged on the hook plate 2, and the interlocking rod 5 is linked to the grounding switch. When the grounding switch is opened and closed, the interlocking rod 5 is driven to move, and the interlocking rod 5 moves, so that the hook plate 2 and the fixing hook 1 can be switched between a buckled state and a separated state.

[0029] The specific connection between the interlocking rod 5 and the grounding switch includes but is not limited to the interlocking rod 5 and the grounding switch shaft forming a crank slide mechanism, the grounding switch shaft rotates to drive the interlocking shaft to slide and retract; the grounding switch shaft is provided with a gear rack structure, and the interlocking rod 5 is controlled by the rack to retract and retract, etc. The interlocking rod 5 is linked to the grounding switch in the switch cabinet, and the grounding switch is opened. The interlocking rod 5 drives the hook plate 2 to always be buckled with the fixed hook 1 to ensure that the rear sealing plate 3 is always closed. When the grounding switch is closed, the cable interval is in a non-powered state, and the interlocking rod 5 separates the hook plate 2 from the fixed hook 1, so that the rear sealing plate 3 can be opened to achieve safety interlocking.

[0030] Furthermore, the hook plate 2 is rotatably set on the interlocking rod 5, and a block 6 is provided on the mounting plate 4. The opening and closing of the grounding switch is linked to the telescopic action of the interlocking rod 5. The interlocking rod 5 pulls the hook plate 2, so that the hook plate 2 contacts the block 6 and rotates.

[0031] Specifically, a driving structure for the interlocking rod 5 to be extended and retracted in linkage with the contact switch is selected. When the grounding switch is closed, the interlocking rod 5 is extended; when the grounding switch is opened, the interlocking rod 5 is retracted. When the interlocking rod 5 is retracted, the interlocking rod 5 drives the hook plate 2 to move, and one side of the hook plate 2 is abutted by the block 6. The hook plate 2 is forced to rotate on the interlocking rod 5, and the hook teeth of the hook plate 2 are just engaged with the hook teeth of the fixed hook 1, ensuring the closure of the rear sealing plate 3 and avoiding the accidental opening of the rear sealing plate 3 when the cable is spaced. At the same time, because the block 6 continuously gives the hook plate 2 a rotational force, the reliable engagement of the hook plate 2 and the fixed hook 1 is effectively ensured.

[0032] Furthermore, a through slot block 7 is fixedly provided on the mounting plate 4, and the interlocking rod 5 is slidably provided in the through slot block 7. At the same time, the stopper 6 and the through slot block 7 can be provided as an integral structure, fixedly provided on the mounting plate 4, and the sliding direction of the interlocking rod 5 is determined by the through slot with a given fixed direction, so as to ensure the stable sliding of the interlocking rod 5.

[0033] Furthermore, if Figure 3 As shown, the interlocking rod 5 includes a first part 51 and a second part 52, the first part 51 is linked to the grounding switch, the second part 52 is provided with a sliding hole 54, the first part 51 is slidably set in the sliding hole 54, and the opening of the sliding hole 54 is provided with a closing end to prevent the first part 51 and the second part 52 from being separated, and a second elastic member 53 is provided in the sliding hole 54, and the second elastic member 53 abuts against the first part 51.

[0034] Specifically, in order to cope with the associated structures of grounding switches with different travels of different switch cabinets, the interlocking rod 5 is provided with two sections of sliding connection. When the grounding switch is closed, the first part 51 of the interlocking rod 5 extends forward, so that the second elastic member 53 abuts against the second part 52, and the second part 52 drives the hook plate 2 to rotate and separate. At the same time, when the separation action is completed but the first part 51 continues to extend forward, the second elastic member 53 is compressed, which plays a certain buffering role, avoiding the second part 52 from abutting against the fixed hook 1, and also avoiding damage to the structure of the hook plate 2 or the associated structure of the interlocking rod 5 and the grounding switch. It should be noted that when the grounding switch is opened, the first part 51 of the interlocking rod 5 abuts against the closing of the sliding hole 54 of the second part 52, and the second part 52 has moved the required formation to ensure the buckling of the hook plate 2 and the fixed plate.

[0035] Embodiment 2:

[0036] Generally, the interlocking mechanism of the rear sealing plate 3 is close to the rear sealing plate 3, and is far away from the grounding switch in the cabinet. Since the actions of the two are linked only by the interlocking rod 5, in order to avoid failure of the linkage, a safety structure is provided on the basis of Example 1, and a first elastic component is provided between the through slot block 7 and the interlocking rod 5. The first elastic component provides a force for the interlocking rod 5 to move away from the fixed hook 1. When the linkage connection fails, it can ensure that the interlocking rod 5 can be retracted under the linkage of the grounding switch, thereby ensuring the buckling of the hook plate 2 and the fixed hook 1, and avoiding accidental start-up of the rear sealing plate 3.

[0037] Further, such as Figure 2 As shown, the fixing hook 1 includes a hook body 11 and a hook body mounting portion 12. The hook body mounting portion 12 is fixedly arranged on the side of the rear sealing plate 3 facing away from the interior of the switch cabinet. The hook body 11 is detachably connected to the hook body mounting portion 12. The hook body 11 extends from the outside of the rear sealing plate 3 into the switch cabinet.

[0038] Specifically, the fixing hook 1 is divided into two parts, the hook body installation part 12 is fixedly arranged on the surface of the rear sealing plate 3, and the bolt 14 structure is extended from the rear sealing plate 3 into the switch cabinet, and the hook body 11 can be detachably installed on the bolt 14 structure. At the same time, the hook body installation part 12 is also provided with a cover plate 13 to cover the internal structure of the hook body installation part 12 to prevent the internal bolt 14 structure from being dusty, damp, and rusted.

[0039] At the same time, the detachable distribution structure is also convenient for corresponding the installation position of the mounting plate 4 of the hook plate 2 during installation; at the same time, when the linkage between the interlocking rod 5 and the grounding switch fails, the hook body 11 of the fixed hook 1 can be removed through the mounting plate 4 of the hook body 11 outside the rear sealing plate 3, and the contact with the hook plate 2 can be buckled, so that the rear sealing plate 3 can be opened smoothly.

[0040] Embodiment three:

[0041] In order to facilitate the installation of the plate-type rear sealing plate 3, and also to cope with the problem that there is no installation groove or other structure between some switch cabinets and the rear sealing plate 3, this plate-type rear sealing plate 3 is directly "covered" behind the switch cabinet. In this case, the structures of the first and second embodiments can only limit the displacement of the rear sealing plate 3 in the direction of approaching or moving away from the switch cabinet. In order to limit the movement of all degrees of freedom of the rear sealing plate 3, such as Figure 4 As shown, a positioning hole 31 is provided on the rear sealing plate 3, and the positioning hole 31 includes two connected parts of small aperture and large aperture. A latch 8 is fixedly provided on the mounting plate 4, and the small aperture of the positioning hole 31 is larger than the rod diameter of the latch 8 and smaller than the head diameter of the latch 8, and the large aperture of the positioning hole 31 is larger than the head diameter of the latch 8. When the rear sealing plate 3 is closed, the head of the latch 8 extends into the rear sealing plate 3 and extends out from the positioning hole 31; when the hook plate 2 is buckled with the fixing hook 1, the rod of the latch 8 is located at the small aperture part of the positioning hole 31.

[0042] When the rear sealing plate 3 needs to be opened, in addition to releasing the lock between the hook plate 2 and the fixing hook 1, the rear sealing plate 3 needs to be translated so that the rod of the latch 8 on the rear sealing plate 3 is located at the positioning hole 31 with a large aperture, so that the head of the latch 8 can pass through the positioning hole 31, thereby releasing the positioning of the latch 8 on the rear sealing plate 3, and then opening the rear sealing plate 3. This double-limited rear sealing plate 3 structure can effectively ensure the perfect five-prevention measures and avoid the rear sealing plate 3 from being opened by mistake.

[0043] It should be noted that the buckling method of the hook plate 2 and the fixed hook 1 in the first and second embodiments can generally limit the movement of the fixed hook 1 on the rear sealing plate 3 in the direction of the hook opening, so the direction from the small aperture to the large aperture of the positioning hole 31 on the rear sealing plate 3 is opposite to the direction of the hook opening of the fixed hook 1. Figure 2 In the figure, the content is regarded as the side view of the device. The fixed hook 1 and the hook plate 2 limit the displacement of the rear sealing plate 3 forward and backward and downward. At this time, the positioning hole 31 on the rear sealing plate 3 should be with the small aperture at the bottom and the large aperture at the top. The rod of the latch 8 is located at the small aperture part of the positioning hole 31. At this time, only by moving the rear sealing plate 3 downward can the latch 8 be in the large aperture position, but the movement of the rear sealing plate 3 is completely restricted by the buckling of the fixed hook 1 and the hook plate 2. Only when the grounding card is closed and the fixed hook 1 is in contact with the hook plate 2, can the rear sealing plate 3 be moved downward to release the limit of the latch 8.

[0044] Specifically, the mounting plate 4 of the latch 8 can be separately provided from the mounting plate 4 of the hook plate 2, and multiple mounting plates can be provided inside the switch cabinet. Meanwhile, the positioning holes 31 are also provided accordingly to ensure the stability of the installation and closure of the rear sealing plate 3.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An interlocking device for a rear cover plate of a switch cabinet, characterized in that: The invention comprises a fixing hook (1) and a hook plate (2), wherein the fixing hook (1) is fixedly arranged on a side of a rear sealing plate (3) facing the inside of a switch cabinet, and the hook plate (2) is arranged in the switch cabinet through a mounting plate (4). An interlocking rod (5) is arranged on the hook plate (2), and the interlocking rod (5) is linked to a grounding switch. When the grounding switch is turned on and off, the interlocking rod (5) is driven to move, and the interlocking rod (5) is moved, so that the hook plate (2) and the fixing hook (1) are switched between a buckled state and a separated state.

2. The interlocking device of the rear cover of a switch cabinet according to claim 1, characterized in that: The hook plate (2) is rotatably mounted on the interlocking rod (5), a stopper (6) is mounted on the mounting plate (4), the opening and closing of the grounding switch is linked to the telescopic movement of the interlocking rod (5), and the interlocking rod (5) pulls the hook plate (2), causing the hook plate (2) to contact the stopper (6) and rotate the hook plate (2).

3. The interlocking device of the rear cover of a switch cabinet according to claim 2, characterized in that: A through slot block (7) is fixedly arranged on the mounting plate (4), and the interlocking rod (5) is slidably arranged in the through slot block (7).

4. The interlocking device for the rear cover of a switch cabinet according to claim 3, characterized in that: A first elastic component is provided between the through-slot block (7) and the interlocking rod (5), and the first elastic component provides the interlocking rod (5) with a force to move away from the fixing hook (1).

5. The interlocking device of the rear cover of a switch cabinet according to claim 4, characterized in that: The fixing hook (1) comprises a hook body (11) and a hook body mounting portion (12); the hook body mounting portion (12) is fixedly arranged on a surface of the rear sealing plate (3) facing away from the interior of the switch cabinet; the hook body (11) and the hook body mounting portion (12) are detachably connected; the hook body (11) extends from the outside of the rear sealing plate (3) into the switch cabinet.

6. An interlocking device for a rear cover plate of a switch cabinet according to any one of claims 2 to 5, characterized in that: The interlocking rod (5) comprises a first part (51) and a second part (52), the first part (51) being linked to the grounding switch, the second part (52) being provided with a sliding hole (54), the first part (51) being slidably arranged in the sliding hole (54), a closing end being arranged at the opening of the sliding hole (54) to prevent the first part (51) and the second part (52) from being separated, an elastic component (53) being arranged in the sliding hole (54), the elastic component (53) being in contact with the first part (51).

7. The interlocking device of the rear cover of a switch cabinet according to claim 6, characterized in that: A positioning hole (31) is provided on the rear sealing plate (3), and the positioning hole (31) comprises two parts of a small aperture and a large aperture which are connected. A latch pin (8) is fixedly provided on the mounting plate (4), and the small aperture of the positioning hole (31) is larger than the rod diameter of the latch pin (8) and smaller than the head diameter of the latch pin (8), and the large aperture of the positioning hole (31) is larger than the head diameter of the latch pin (8). When the rear sealing plate (3) is closed, the head of the latch pin (8) extends into the rear sealing plate (3) and extends out of the positioning hole (31); when the hook plate (2) is buckled with the fixing hook (1), the rod of the latch pin (8) is located at the small aperture part of the positioning hole (31).

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