Mechanical interlocking device for switch cabinet and switch cabinet

Abstract

The application discloses a mechanical interlocking device for a switch cabinet and the switch cabinet, and relates to the technical field of interlocking devices, wherein the mechanical interlocking device for the switch cabinet comprises an isolation mechanism, a circuit breaker mechanism and an interlocking assembly. The circuit breaker and the disconnector are respectively operated by the circuit breaker mechanism and the isolation mechanism, the first interlocking unit is directly associated on the first output shaft, there is no intermediate link, and the reliability is high. The slider is driven to move up and down by the connecting rod mechanism, so that the sticking phenomenon of the slider can be effectively avoided; the moving distance of the slider is small, so that the circuit breaker closing operation can be limited or unlocked, and the interlocking reliability is high. Meanwhile, the connecting rod mechanism can realize large space transfer, the action point of force can be conveniently adjusted to a proper position, three-dimensional force can be changed into plane force, energy loss is small, transmission is accurate, and the efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of interlocking devices, and in particular to a mechanical interlocking device for a switch cabinet and the switch cabinet. Background Art

[0002] In the related technology, high-voltage complete switchgear adopts a five-protection interlocking device, but the current mechanical interlocking device is prone to jamming and deformation, which can easily lead to interlocking failure and low reliability. It poses a safety hazard to the safety of operation and maintenance personnel and the prevention of misoperation of high-voltage complete switchgear. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a mechanical interlocking device for a switch cabinet, which can effectively reduce the sticking phenomenon and thus improve the reliability of the interlocking device.

[0004] The present invention also provides a switch cabinet having the above-mentioned mechanical interlocking device for a switch cabinet.

[0005] According to an embodiment of the present invention, a mechanical interlocking device for a switchgear includes: an isolating mechanism including a first output shaft, the first output shaft being used to control the isolating switch to switch between three states: closed, open, and earthed; a circuit breaker mechanism including a closing half-shaft and a closing limit block, the closing half-shaft being used to control the closing of the circuit breaker, the closing limit block being fixedly connected to the closing half-shaft, and the closing limit block moving with the closing half-shaft; and an interlocking assembly including a first interlocking unit, the first interlocking unit including a connecting rod mechanism, a crank, a connecting rod, and a slider, one end of the connecting rod mechanism being fixedly connected to the first output shaft, the other end of the connecting rod mechanism being rotatably connected to the isolating mechanism and fixedly connected to one end of the crank, the other end of the crank being hinged to one end of the connecting rod, and the other end of the connecting rod being hinged to the slider, the slider being movably mounted on the circuit breaker mechanism, the slider being provided with a limit portion cooperating with the closing limit block, the connecting rod mechanism driving the slider to move downward so that the limit portion stops the closing limit block.

[0006] Furthermore, the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is fixedly connected to the first output shaft, the other end of the first connecting rod is connected to one end of the second connecting rod, the other end of the second connecting rod is rotatably connected to the isolation mechanism and fixedly connected to one end of the crank, and the second connecting rod is arc-shaped.

[0007] Further, the sliding block is provided with a first sliding groove in a runway shape, which is in sliding connection with a supporting pin fixedly installed on the circuit breaker mechanism, and the supporting pin is used for bearing the force of the closing limiting block acting on the limiting part.

[0008] Further, when the crank is in a vertical state, the limiting part can stop the closing limiting block, and the direction of the force between the closing limiting block and the limiting part is perpendicular to the sliding direction of the sliding block.

[0009] Further, a second interlocking unit is further included, the second interlocking unit comprises an operating shaft baffle, a reset spring and a top plate, the circuit breaker mechanism comprises a second output shaft, the top plate is fixedly connected with the second output shaft, and rotating the second output shaft can drive the top plate to rotate, so that the operating shaft baffle is lifted to shield the operating shaft of the isolation mechanism.

[0010] Further, the operating shaft baffle comprises a first part and a second part arranged below the first part, and the first part and the second part are connected by a fastener to facilitate adjustment of the overall length of the operating shaft baffle.

[0011] Further, the end of the top plate for abutting against the operating shaft baffle has an inclined surface.

[0012] Further, a third interlocking unit is further included, the third interlocking unit comprises a limiting disc, a first cabinet door interlocking rod, a second cabinet door interlocking rod, a reset compression spring, a guide plate, a connecting plate and a limiting plate, the limiting disc is fixedly connected with the first output shaft, the limiting disc has a notch and an arc segment, one end of the first cabinet door interlocking rod abuts against the limiting disc, the other end of the first cabinet door interlocking rod is connected with the connecting plate, one end of the second cabinet door interlocking rod is connected with the connecting plate, the other end of the second cabinet door interlocking rod is used for being connected with a cabinet door, the guide plate is fixedly installed on the circuit breaker mechanism, the guide plate plays a guiding role on the connecting plate, the reset compression spring drives the first cabinet door interlocking rod to reset, the limiting plate is fixedly connected with the second output shaft, and the limiting plate limits the movement of the connecting plate by abutting against the connecting plate.

[0013] Further, the circuit breaker mechanism further comprises a tripping half shaft and a push plate, the tripping half shaft is used for controlling tripping of the circuit breaker, the push plate is fixedly connected with the tripping half shaft, and the connecting plate limits rotation of the push plate by abutting against the push plate.

[0014] The switch cabinet according to another aspect of the present application comprises the mechanical interlocking device for a switch cabinet as described above.

[0015] The aforementioned mechanical interlocking device for switchgear has at least the following beneficial effects: the circuit breaker and disconnector are operated by the circuit breaker mechanism and the disconnector mechanism, respectively, directly linking the first interlocking unit to the first output shaft without any intermediate links, resulting in high reliability. The use of a connecting rod mechanism to drive the slider up and down effectively prevents slider jamming; the small distance the slider moves can limit or unlock the circuit breaker closing operation, resulting in high interlocking reliability. Furthermore, the connecting rod mechanism enables transfer over a large space, facilitating adjustment of the force application point to an appropriate position, converting three-dimensional force into planar force, resulting in low energy loss, accurate transmission, and high efficiency.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 This is a schematic diagram of the installation of a mechanical interlocking device for a switch cabinet according to an embodiment of one aspect of the present invention;

[0019] Figure 2 for Figure 1 A front view schematic diagram of

[0020] Figure 3 for Figure 1 Schematic diagram of the left side;

[0021] Figure 4 for Figure 3 Middle AA cross-sectional view;

[0022] Figure 5 This is a schematic diagram of the operation of the first interlocking unit in the mechanical interlocking device for a switch cabinet according to one embodiment of the present invention;

[0023] Figure 6 Another working schematic diagram of the first interlocking unit in the mechanical interlocking device for a switch cabinet according to one embodiment of the present invention;

[0024] Figure 7 Another working schematic diagram of the first interlocking unit in the mechanical interlocking device for a switch cabinet according to one embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the operation of the second interlocking unit in the mechanical interlocking device for a switch cabinet according to one embodiment of the present invention;

[0026] Figure 9 Another working schematic diagram of the second interlocking unit in the mechanical interlocking device for a switch cabinet according to one embodiment of the present invention;

[0027] Figure 10 Fig. 3 is a working schematic diagram of the third interlocking unit in the mechanical interlocking device for switch cabinet according to an embodiment of the present application;

[0028] Figure 11 Fig. 4 is another working schematic diagram of the third interlocking unit in the mechanical interlocking device for switch cabinet according to an embodiment of the present application;

[0029] Figure 12 Fig. 5 is another working schematic diagram of the third interlocking unit in the mechanical interlocking device for switch cabinet according to an embodiment of the present application;

[0030] Figure 13 Fig. 6 is a working schematic diagram of the opening half shaft and the push plate in the mechanical interlocking device for switch cabinet according to an embodiment of the present application;

[0031] Figure 14 Fig. 7 is another working schematic diagram of the opening half shaft and the push plate in the mechanical interlocking device for switch cabinet according to an embodiment of the present application.

[0032] Reference signs:

[0033] 1, lower cabinet door; 10, air tank; 11, switch;

[0034] 100, isolation mechanism; 110, first output shaft; 120, operation shaft;

[0035] 200, circuit breaker mechanism; 210, closing half shaft; 220, closing limit block; 230, second output shaft; 240, opening half shaft; 250, push plate;

[0036] 300, interlocking assembly; 311, first connecting rod; 312, second connecting rod; 313, third connecting rod; 314, mounting plate; 315, rotating shaft; 320, crank; 321, operation shaft stopper; 3211, first part; 3212, second part; 3213, jacking part; 322, reset spring; 323, top plate; 3231, inclined surface; 324, limit plate; 330, connecting rod; 340, sliding block; 341, second sliding groove; 342, sliding rod; 343, first sliding groove; 344, limit part; 345, support pin; 331, limit disc; 3311, notch; 3312, circular segment; 332, first cabinet door interlocking rod; 333, second cabinet door interlocking rod; 334, reset compression spring; 335, guide plate; 336, connecting plate; 3361, stop part. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described below in the detailed description and illustrated in the accompanying drawings by which like or similar elements, structures and / or functions have been given the same reference numerals and functionalities (which are known to those skilled in the art) are not described in detail. The embodiments described below are exemplary only and are not intended to be limiting of the present application.

[0038] In the description of the present application, if the orientation description such as up, down, front, back, left, right and the like is referred to, the orientation or position relationship based on the orientation or position relationship shown in the drawings is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0040] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0041] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] Referring to Figures 1 to 4 As shown in the drawings, an embodiment of the present application discloses a mechanical interlocking device for switch cabinet, which comprises an isolation mechanism 100, a circuit breaker mechanism 200 and an interlocking assembly 300.

[0043] As shown in the drawings, Figure 1 and Figure 2As shown, the isolating mechanism 100 comprises a first output shaft 110 for controlling the isolating switch to switch among the three states of closing, opening and grounding closing. The isolating mechanism 100 drives the isolating switch to switch among the three states of closing, opening and grounding closing through the first output shaft 110.

[0044] As shown, the circuit breaker mechanism 200 comprises a closing half shaft 210 for controlling the closing of the circuit breaker and a closing limit block 220 fixedly connected with the closing half shaft 210 and moving with the closing half shaft 210. Specifically, rotating the closing half shaft 210 can control the closing operation of the circuit breaker. The closing limit block 220 is fixedly connected with the closing half shaft 210, and when the closing half shaft 210 rotates, the closing limit block 220 rotates with the closing half shaft 210. When the rotation of the closing limit block is blocked, the closing half shaft 210 is also blocked. Figure 4 As shown, the interlocking assembly 300 comprises a first interlocking unit comprising a connecting rod mechanism, a crank 320, a connecting rod 330 and a sliding block 340. One end of the connecting rod mechanism is fixedly connected with the first output shaft 110, the other end of the connecting rod mechanism is rotatably connected with the isolating mechanism 100 and fixedly connected with one end of the crank 320, the other end of the crank 320 is hingedly connected with one end of the connecting rod 330, the other end of the connecting rod 330 is hingedly connected with the sliding block 340, the sliding block 340 is movably installed on the circuit breaker mechanism 200, the sliding block 340 is provided with a limiting portion 344 matched with the closing limit block 220, and the connecting rod mechanism is used to drive the sliding block 340 to move up and down.

[0045] Figure 4 The closing half shaft 210 and the closing limit block 220 are both below the sliding block 340. The sliding block 340 comprises a first station and a second station. When the sliding block 340 is in the first station, the limiting portion 344 stops the closing limit block 220, and at this time, the limiting portion 344 of the sliding block 340 can limit the rotation of the closing half shaft 210, as shown in

[0046] When the sliding block 340 is in the second station, i.e. the position of the sliding block 340 after the connecting rod mechanism drives the sliding block 340 to move upward, at this time, the limiting portion 344 of the sliding block 340 cannot stop the closing limit block 220, and the closing half shaft 210 can rotate counterclockwise, as shown in Figure 4 Figure 6 Figure 5 Figure 7

[0047] Referring to Figure 4 ​​​​​As shown, a plurality of second sliding grooves 341 are arranged on the slider 340, and each of the second sliding grooves 341 is in the shape of a waist circle. A sliding rod 342 is arranged in each of the second sliding grooves 341, and the sliding rod 342 guides the slider 340 to move up and down relative to the circuit breaker mechanism 200.

[0048] Referring to Figures 5 to 7 As shown, the connecting rod mechanism comprises a first connecting rod 311, a second connecting rod 312 and a third connecting rod 313. One end of the first connecting rod 311 is fixedly connected with the first output shaft 110, and the other end of the first connecting rod 311 is connected with one end of the second connecting rod 312. The other end of the second connecting rod 312 is hingedly connected with one end of the third connecting rod 313. The other end of the third connecting rod 313 is rotatably connected with the isolating mechanism 100 and fixedly connected with one end of the crank 320. The second connecting rod 312 is in the shape of an arc. In this embodiment, the angle between the connecting rod 330 and the vertical direction is θ, and the angle θ is small according to the illustration. That is, the connecting rod mechanism and the crank 320 drive the connecting rod 330 to swing in a small angle range, and the connecting rod 330 drives the slider 340 to move up and down in the swinging process. The connecting rod 330 swings in a small angle θ, so that the connecting rod mechanism and the crank 320 can easily drive the slider 340 to move up and down, thereby effectively avoiding the phenomenon that the slider 340 is stuck. In use, only a small distance of the slider 340 needs to be moved upward, so that the limiting portion 344 can release the blocking effect on the closing limiting block 220, and then the closing operation of the circuit breaker is limited or unlocked. Therefore, the reliability of the interlocking is high.

[0049] Please continue to refer to Figure 4 and Figure 5 As shown, the connecting rod mechanism further comprises a mounting plate 314. One end of the mounting plate 314 is fixedly mounted on the isolating mechanism 100, and the other end of the mounting plate 314 extends downward. The closing half shaft 210 is located on the extension line of the mounting plate 314. A rotating shaft 315 is arranged on the mounting plate 314. The right end of the third connecting rod 313 is rotatably mounted on the rotating shaft 315, and the upper end of the crank 320 is also rotatably mounted on the rotating shaft 315. The upper end of the crank 320 is fixedly connected with the right end of the third connecting rod 313, so that the connecting rod mechanism can drive the crank 320 to swing around the rotating shaft 315, and the crank 320 drives the connecting rod 330 to swing to move the slider 340 up and down. When the crank 320 and the connecting rod 330 are in the vertical direction, the slider 340 is at the lowest position, and at this time, the limiting portion 344 limits the closing limiting block 220 to rotate counterclockwise, as shown in Figure 6 When the connecting rod 330 swings to the left or to the right, the slider 340 is at the highest position, and at this time, the closing limiting block 220 can rotate counterclockwise, as shown in Figure 5 and Figure 7The connecting rod mechanism can realize large distance space conversion, adjusts the action point to a proper position, changes three-dimensional space stress into plane stress, and has small energy loss, accurate transmission and high efficiency.

[0050] The connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example, Figures 5 to 7 As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example, Figure 5 As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example, Figure 6 As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example, Figure 7 As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example,

[0051] As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example, Figures 5 to 7 As shown in the figure, the connecting rod 330 corresponds to the grounding closing position, the opening position and the closing position of the disconnector in the left, middle and right positions respectively, and can realize the first interlocking function, that is, when the disconnector is in the opening state, the closing limiting block 220 abuts against the limiting portion 344, and the closing limiting block 220 and the closing half shaft 210 cannot be counterclockwise rotated, so that the circuit breaker cannot be closed, for example,

[0052] In some embodiments, as shown in Figure 8 and Figure 9As shown, the mechanical interlocking device further comprises a second interlocking unit, the second interlocking unit comprising an operating shaft baffle 321, a reset spring 322 and a top plate 323, the circuit breaker mechanism 200 comprising a second output shaft 230, the top plate 323 being fixedly connected with the second output shaft 230, rotating the second output shaft 230 can drive the top plate 323 to rotate so as to lift the operating shaft baffle 321, so that the operating shaft baffle 321 shields the operating shaft 120 of the isolating mechanism 100. Specifically, the operating shaft baffle 321 can move up and down, the reset spring 322 providing a vertically downward force to the operating shaft baffle 321, so that the operating shaft baffle 321 can move downward after losing the action of the top plate 323, so that the operating shaft 120 of the isolating mechanism 100 is exposed, as shown in Figure 9 .

[0053] In this embodiment, as shown in Figure 8 and Figure 9 , wherein, Figure 8 a position diagram of the operating shaft baffle 321 when the circuit breaker is in the closed state is shown; Figure 9 a position diagram of the operating shaft baffle 321 when the circuit breaker is in the open state is shown. When the circuit breaker is in the closed state, as shown in Figure 8 , the bottom of the operating shaft baffle 321 is provided with a lifting part 3213, the top plate 323 lifts the operating shaft baffle 321 by lifting the lifting part 3213, at this time, the operating shaft baffle 321 shields the operating shaft 120, so that the operating handle of the disconnecting switch cannot be inserted, and the disconnecting switch cannot be operated; when the circuit breaker is in the open state, as shown in Figure 9 , the top plate 323 no longer lifts the operating shaft baffle 321, the operating shaft baffle 321 is pulled down by the reset spring, the operating shaft baffle 321 no longer shields the operating shaft 120 of the isolating mechanism 100, so that the operating handle of the disconnecting switch can be inserted, thereby realizing the operation of the disconnecting switch.

[0054] Based on the foregoing arrangement, the mechanical interlocking device of the present embodiment can realize a second interlocking function, that is, when the circuit breaker is in the closed state, the operating shaft baffle 321 shields the operating shaft 120, the operating handle of the disconnecting switch cannot be inserted into the operating shaft 120, therefore, the disconnecting switch cannot be operated, as shown in Figure 8 .

[0055] In some embodiments, the operating shaft baffle 321 includes a first portion 3211 and a second portion 3212 disposed below the first portion 3211. The first portion 3211 and the second portion 3212 are connected by fasteners to facilitate adjustment of the overall length of the operating shaft baffle 321. In this embodiment, the operating shaft baffle 321 is a split structure, divided into upper and lower sections, which are fastened together with screws to facilitate adjustment and installation. This eliminates the adverse effects on the operating shaft baffle 321 caused by the large distance between the disconnector mechanism and the circuit breaker mechanism 200 and deformation of the switchgear gas box 10, thereby improving the reliability of the interlocking mechanism.

[0056] Furthermore, one end of the top plate 323 for contacting the operating shaft baffle 321 has a slope 3231 to facilitate lifting the operating shaft baffle 321 .

[0057] In some embodiments, see Figures 10 to 12 As shown, the interlocking device also includes a third interlocking unit, which includes a limiting disc 331, a first cabinet door interlocking rod 332, a second cabinet door interlocking rod 333, a reset compression spring 334, a guide plate 335, a connecting plate 336 and a limiting plate 324. The limiting disc 331 is fixedly connected to the first output shaft 110, and the limiting disc 331 has a notch 3311 and an arc segment 3312. One end of the first cabinet door interlocking rod 332 abuts against the limiting disc 331, and the other end of the first cabinet door interlocking rod 332 abuts against the connecting plate 336 is connected, one end of the second cabinet door interlock rod 330 is connected to the connecting plate 336, and the other end of the second cabinet door interlock rod 330 is used to connect to the cabinet door. The guide plate 335 is fixedly installed on the circuit breaker mechanism 200, and the guide plate 335 guides the connecting plate 336. The reset compression spring 334 drives the first cabinet door interlock rod 332 to reset, and the limit plate 324 is fixedly connected to the second output shaft 230. When the circuit breaker is in the open state, the limit plate 324 abuts against the connecting plate 336 to limit the movement of the connecting plate 336.

[0058] The second cabinet door interlocking rod 333 moves up and down to restrict and unlock the lifting of the lower cabinet door 1. A hook is provided on the side of the lower cabinet door 1. If the lower cabinet door 1 cannot be lifted, the side hook cannot be disengaged and the lower cabinet door 1 cannot be opened; if the lower cabinet door 1 can be lifted, the side hook can be disengaged and the lower cabinet door 1 can be opened.

[0059] When the circuit breaker is in the open state, the circuit breaker mechanism 200 is in Figure 11 Position, the limit plate 324 presses the connecting plate 33614 so that the second cabinet door interlocking rod 333 cannot move upward. Regardless of whether the isolating switch is in the closed or open state, the isolation mechanism 100 is respectively in Figure 10 and Figure 12 At this time, the limiting disc 331 presses the first cabinet door interlocking rod 332, so that the second cabinet door interlocking rod 333 cannot move upward.Figure 10 or Figure 12 When the lower cabinet door 1 is in the position, the lower cabinet door 1 cannot move upward, and the side hook of the lower cabinet door 1 cannot be separated from the cabinet body. At this time, the lower cabinet door 1 cannot be opened.

[0060] When the circuit breaker is in the closed state, the circuit breaker mechanism 200 is in Figure 10 Position, the limit plate 324 no longer presses the connecting plate 336, and the second cabinet door interlocking rod 333 can move upward, thereby releasing a restriction on the upward lifting of the lower cabinet door 1; when the isolating switch is in the grounding closed state, the isolation mechanism 100 is in Figure 10 At this point, the notch 3311 of the limiting disc 331 is aligned with the end of the first cabinet door interlocking rod 332, and the arc segment 3312 of the limiting disc 331 does not restrict the upward movement of the first cabinet door interlocking rod 332. Therefore, the first cabinet door interlocking rod 332 can move upward, thereby removing the other restriction on the upward movement of the lower cabinet door 1. At this point, both restrictions are removed, and the lower cabinet door 1 can be lifted and moved upward. The side hook is disengaged from the cabinet body, and the lower cabinet door 1 can be opened.

[0061] The direction of the lifting force of the lower cabinet door 1 is limited by acting on the center of the second output shaft 230 through the second cabinet door interlocking rod 333, and acting on the center of the first output shaft 110 through the first cabinet door interlocking rod 332 to avoid bending and torsional deformation, and the interlocking reliability is high.

[0062] Based on the aforementioned mechanical interlocking device for switch cabinet, the mechanical interlocking device for switch cabinet can realize the third interlocking function, that is, the lower cabinet door 1 can be opened only when the circuit breaker is in the closed state and the disconnector is also in the grounded closed state. Figures 10 to 11 As shown. Figure 10 As shown, when the circuit breaker is in the closed state, the limit plate 324 no longer restricts the upward movement of the connecting plate 336; and when the disconnector is in the grounded closed state, the notch 3311 of the limit disc 331 is aligned with the first cabinet door interlocking rod 332. The first cabinet door interlocking rod 332 can move upward under the action of the return compression spring 334. Therefore, when the lower cabinet door 1 is lifted, it can be opened.

[0063] in, Figure 10 It shows the coordination diagram of various mechanisms when the circuit breaker is in the closed state and the disconnector is in the grounded state;

[0064] Figure 11 This is a schematic diagram of the coordination of various mechanisms when the circuit breaker and the disconnector are in the open state; Figure 12 This is a schematic diagram of the coordination of various mechanisms when the circuit breaker is in the closed state and the disconnector is in the closed state.

[0065] In some embodiments, see Figure 13 and Figure 14As shown, the circuit breaker mechanism 200 further comprises a tripping half shaft 240 for controlling the tripping of the circuit breaker and a push plate 250 fixedly connected with the tripping half shaft 240. After the lower cabinet door 1 is opened, the connecting plate 336 is used to abut against the push plate 250 to limit the rotation of the push plate 250. Through the up-down movement of the connecting plate 336, the rotation of the tripping half shaft 240 of the circuit breaker mechanism 200 is limited and unlocked, and whether the circuit breaker can be tripped is realized. After the lower cabinet door 1 is opened, the second cabinet door interlocking rod 333 is no longer restricted by the lower cabinet door 1 and moves upward under the action of the reset spring 334. The connecting plate 336 moves upward together with the first cabinet door interlocking rod 332 to a position as shown in Figure 14 Fig. 6, at which time the connecting plate 336 is staggered with the push plate 250, the connecting plate 336 blocks the push plate 250, thereby limiting the counterclockwise rotation of the tripping half shaft 240. At this time, the circuit breaker cannot be tripped. In the embodiment, the force limiting the torque of the tripping half shaft 240 is designed to be horizontally directed to the connecting plate 336 and directly acts on the guide plate 335, and the mechanical performance is reasonable. The force acting on the guide plate 335 can eliminate the jamming phenomenon caused by the bending deformation of the first cabinet door interlocking rod 332 or the first cabinet door interlocking rod 332, and the interlocking reliability is high.

[0066] Based on the foregoing mechanical interlocking device, a fourth interlocking function can be realized, that is, after the lower cabinet door 1 is opened, the circuit breaker cannot be tripped, as shown in Figure 13 and Figure 14 . Among them, Figure 13 Fig. 6 shows that the connecting plate 336 is at the bottom, that is, the position of the connecting plate 336 when the lower cabinet door 1 is closed. At this time, the stop portion 3361 of the connecting plate 336 is not moved upward, so the stop portion 3361 cannot limit the counterclockwise rotation of the push plate 250. At this time, the circuit breaker can be tripped; Figure 14 Fig. 7 shows the position diagram of the connecting plate 336 after moving upward (that is, after the lower cabinet door 1 is opened). At this time, the stop portion 3361 is staggered with the push plate 250, and the stop portion 3361 can limit the counterclockwise rotation of the push plate 250. Therefore, the circuit breaker cannot be tripped.

[0067] Referring to Figure 1 , another aspect of the embodiment of the present application discloses a switch cabinet, which comprises the mechanical interlocking device for switch cabinet as described above, and further comprises an air tank 10, a disconnector and a circuit breaker switch. By adopting the foregoing mechanical interlocking device for switch cabinet, the safety hidden danger existing in the maintenance of the operating personnel and the anti-misoperation of the high-voltage complete switch equipment can be effectively reduced, and the safety of the operating personnel is provided, which meets the mechanical interlocking requirements of the high-voltage complete switch equipment. Among them, the switch 11 includes but is not limited to the disconnector and the circuit breaker switch.

[0068] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. Furthermore, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A mechanical interlocking device for a switchgear, characterized by, The utility model relates to an isolating mechanism, a circuit breaker mechanism and an interlocking assembly. The isolating mechanism comprises a first output shaft for controlling the isolating switch to switch among the three states of closing, opening and grounding closing. The circuit breaker mechanism comprises a closing half shaft for controlling the circuit breaker to close and a closing limit block fixedly connected with the closing half shaft. The interlocking assembly comprises a first interlocking unit, which comprises a connecting rod mechanism, a crank, a connecting rod and a sliding block. One end of the connecting rod mechanism is fixedly connected with the first output shaft, the other end of the connecting rod mechanism is rotatably connected with the isolating mechanism and fixedly connected with one end of the crank, the other end of the crank is hingedly connected with one end of the connecting rod, the other end of the connecting rod is hingedly connected with the sliding block, the sliding block is movably installed on the circuit breaker mechanism, the sliding block is provided with a limit part matched with the closing limit block, and the connecting rod mechanism drives the sliding block to move downward to make the limit part stop the closing limit block.

2. The mechanical interlocking device for switchgear according to claim 1, characterized by, The connecting rod mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod.

3. The mechanical interlocking device for switchgear according to claim 2, characterized in that, One end of the first connecting rod is fixedly connected with the first output shaft, the other end of the first connecting rod is connected with one end of the second connecting rod, the other end of the second connecting rod is rotatably connected with one end of the third connecting rod, and the other end of the third connecting rod is fixedly connected with the crank through a rotating shaft.

4. The mechanical interlocking device for switchgear according to claim 1, characterized by, The second connecting rod is in an arc shape.

5. The mechanical interlocking device for switchgear according to claim 4, characterized in that, The sliding block is provided with a first sliding groove in a runway shape, the first sliding groove is slidably connected with a supporting pin fixedly installed on the circuit breaker mechanism, and the supporting pin is used to bear the force of the closing limit block acting on the limit part.

6. The mechanical interlocking device for switchgear according to claim 5, characterized in that, When the crank is in a vertical state, the limit part can stop the closing limit block, and the direction of the force between the closing limit block and the limit part is perpendicular to the sliding direction of the sliding block. The utility model further comprises a second interlocking unit, which comprises an operating shaft baffle, a return spring and a top plate. The circuit breaker mechanism comprises a second output shaft, the top plate is fixedly connected with the second output shaft, and rotating the second output shaft can drive the top plate to rotate to lift the operating shaft baffle, so that the operating shaft baffle blocks the operating shaft of the isolating mechanism. The operating shaft baffle comprises a first part and a second part arranged below the first part, the first part and the second part are connected through fasteners to facilitate adjusting the overall length of the operating shaft baffle. The end of the top plate for abutting against the operating shaft baffle has an inclined surface.

7. The mechanical interlocking device for switchgear according to claim 4, wherein The third interlocking unit comprises a limiting disc, a first cabinet door interlocking rod, a second cabinet door interlocking rod, a reset compression spring, a guide plate, a connecting plate and a limiting plate, the limiting disc is fixedly connected with the first output shaft, the limiting disc has a notch and an arc segment, one end of the first cabinet door interlocking rod is abutted with the limiting disc, the other end of the first cabinet door interlocking rod is connected with the connecting plate, one end of the second cabinet door interlocking rod is connected with the connecting plate, the other end of the second cabinet door interlocking rod is used for being connected with a cabinet door, the guide plate is fixedly installed on the circuit breaker mechanism, the guide plate plays a guiding role on the connecting plate, the reset compression spring drives the first cabinet door interlocking rod to reset, the limiting plate is fixedly connected with the second output shaft, and the limiting plate limits the movement of the connecting plate by abutting with the connecting plate.

8. The mechanical interlocking device for switchgear according to claim 7, characterized in that, The circuit breaker mechanism further comprises an opening half shaft and a push plate, the opening half shaft is used for controlling opening of the circuit breaker, the push plate is fixedly connected with the opening half shaft, and the connecting plate limits rotation of the push plate by abutting with the push plate.

9. Switchgear cabinet, characterized in that The mechanical interlocking device for switch cabinet comprises the mechanical interlocking device for switch cabinet as claimed in any one of claims 1 to 8.

Images