Switch cabinet

Abstract

The utility model belongs to the field of electrical equipment, and particularly relates to a switch cabinet. The switch cabinet comprises a rear door, a grounding switch, an operation box and a connecting rod assembly, the operation box comprises a pin, different positions of the pin correspond to an operable state or a closing locking state of the operation box to the grounding switch, and in the process that the rear door is opened or closed, the connecting rod assembly moves from a first connecting rod position to a second connecting rod position or moves reversely. When the link assembly is in the first link position, the link assembly allows the pin to move to the first pin position and restricts the link assembly in the first link position to lock the rear door in the closed state, and the pin can move away from the first pin position and release the restriction of the link assembly to release the locking of the rear door, when the link assembly is in the second link position, the pin is blocked by a portion of the link assembly from reaching the first pin position. According to the switch cabinet, forward and reverse interlocking of the rear door and the grounding switch can be realized, and the safety of the switch cabinet is improved.

Description

Technical Field

[0001] The utility model belongs to the field of electrical equipment, and in particular relates to a switch cabinet. Background Art

[0002] Switchgear, such as medium voltage switchgear, is often used in the electrical field. Switchgear needs to have high protection performance. For example, it is expected that the switchgear has five anti-mistake functions commonly known as "five protections". As one of the "five protections", the switchgear is expected to have the function of preventing accidental entry into live compartments.

[0003] Specifically, for the switch cabinet, the rear door should be opened only when the grounding switch is closed, so that the operator can access the interior of the switch cabinet under the grounding protection state, otherwise the operator will operate in an unsafe environment.

[0004] However, some existing switch cabinets still have room for improvement in the "five protections". In particular, the interlocking mechanism of some switch cabinets to prevent accidental entry into live compartments still has room for improvement. Therefore, it is hoped that there will be a switch cabinet with further improved safety. Utility Model Content

[0005] In view of the above problems, according to a first aspect of the utility model, a switch cabinet is proposed, wherein the switch cabinet comprises a housing, a rear door which can be opened and closed relative to the housing, an earthing switch arranged in the housing, and an operating box for operating the earthing switch, wherein a connecting rod assembly is further arranged in the housing, the operating box comprises a pin, the pin is configured to move between a first pin position and a second pin position, when the pin is in the first pin position, the operating box allows the earthing switch to switch between a closed state and an open state, when the pin is in the second pin position, the operating box locks the earthing switch in the closed state, and the connecting rod assembly is configured to move linearly between the first connecting rod position and the second connecting rod position. Wherein, during the process of the rear door being opened, the connecting rod assembly moves from the first connecting rod position to the second connecting rod position, and during the process of the rear door being closed, the connecting rod assembly moves from the second connecting rod position to the first connecting rod position, when the connecting rod assembly is in the first connecting rod position, the connecting rod assembly allows the pin to move to the first pin position, and when the pin is in the first pin position, the pin restricts the connecting rod assembly at the first connecting rod position to lock the rear door in a closed state, when the pin is in the second pin position, the pin releases the restriction on the movement of the connecting rod assembly to release the lock of the rear door, and when the connecting rod assembly is in the second connecting rod position, the pin is partially blocked by the connecting rod assembly and cannot reach the first pin position.

[0006] The switch cabinet according to the utility model can realize the forward and reverse interlocking of the rear door of the switch cabinet and the grounding switch, that is, the rear door can be opened only when the grounding switch is in the closed state, and the grounding switch can be opened only when the rear door is closed. Thus, the function of preventing accidental entry into the live interval in the "five-prevention interlocking" of the switch cabinet is realized, and the safety of the switch cabinet is improved.

[0007] The switch cabinet according to the present invention may have one or more of the following features individually or in combination.

[0008] According to one embodiment, preferably, the connecting rod assembly has opposite first and second ends, the first end is located on one side of the operation box, and the second end is located on one side of the rear door, the connecting rod assembly is provided with a receiving hole at the first end, when the connecting rod assembly is in the first connecting rod position and the pin is in the first pin position, the pin is at least partially located in the receiving hole to restrict the connecting rod assembly at the first connecting rod position, and when the connecting rod assembly is in the first connecting rod position and the pin is in the second pin position, the pin leaves the receiving hole to release the restriction on the movement of the connecting rod assembly. According to the switch cabinet of this embodiment, the receiving hole provided in the connecting rod assembly is used to realize the forward and reverse interlocking of the rear door of the switch cabinet and the grounding switch, the operation is stable, and the component manufacturing cost is low.

[0009] According to one embodiment, preferably, the switch cabinet also includes a locking component, which is configured to be driven by the movement of the connecting rod assembly between the first connecting rod position and the second connecting rod position to convert between a locked position and an unlocked position, wherein the locking component locks the rear door in a closed state in the locked position and unlocks the rear door in the unlocked position.

[0010] According to one embodiment, preferably, the switch cabinet further comprises a biasing component, which is configured to apply a biasing force toward the rear door to the connecting rod assembly, so that when the connecting rod assembly is not restricted by the pin, the connecting rod assembly is biased from the first connecting rod position to the second connecting rod position by the biasing component during the process of the rear door being opened. According to the switch cabinet of this embodiment, the biasing component is used to push the connecting rod assembly toward the rear door, so that the unlocking process of the rear door can be completed more smoothly.

[0011] According to one embodiment, preferably, the locking component is arranged on the housing and can rotate relative to the housing, the movement of the connecting rod assembly drives the rotation of the locking component, a protruding column is fixedly arranged on the locking component, and a hook is fixedly arranged on the rear door on the side facing the connecting rod assembly, so that when the locking component rotates from the unlocked position to the locked position, the column moves into the recess defined by the hook to lock the rear door in a closed state, and when the locking component rotates from the locked position to the unlocked position, the column moves away from the recess to release the lock of the rear door. According to the switch cabinet of this embodiment, the locking and unlocking of the rear door are completed by the cooperation of a single locking component and the connecting rod assembly, so that the execution of the interlocking process is more stable, and the parts manufacturing and assembly costs are reduced.

[0012] According to one embodiment, preferably, the connecting rod assembly includes a connecting rod body and a push plate, the push plate is fixed to one end of the connecting rod body and forms the second end of the connecting rod assembly, the push plate includes a force-bearing panel extending perpendicular to the moving direction of the connecting rod assembly, and the rear door pushes the force-bearing panel through the hook to push the connecting rod assembly. According to the switch cabinet of this embodiment, by providing the force-bearing panel of the push plate, it is further ensured that the hook and the push plate can stably push each other, so that the execution of the interlocking process is more stable.

[0013] According to one embodiment, preferably, the push plate includes a slide groove extending in the moving direction of the connecting rod assembly to guide the movement of the connecting rod assembly between the first connecting rod position and the second connecting rod position. According to the switch cabinet of this embodiment, by providing the slide groove, it is further ensured that the connecting rod assembly moves only along its predetermined moving direction to prevent its deflection, so that the execution of the interlocking process is more stable.

[0014] According to one embodiment, preferably, the switch cabinet includes a mounting member fixedly mounted to the housing, and the mounting member is provided with an arc-shaped slide groove to receive the column of the locking component. According to the switch cabinet of this embodiment, by providing the arc-shaped slide groove, it is further ensured that the column moves only on a predetermined track, and the locking component rotates only within a predetermined plane and angle, so that the execution of the interlocking process is more stable.

[0015] According to one embodiment, preferably, the connecting rod assembly further comprises an interlocking plate, the interlocking plate is fixed to one end of the connecting rod body and forms the first end of the connecting rod assembly, and the receiving hole is arranged in the interlocking plate. According to the switch cabinet of this embodiment, the interlocking plate can conveniently adjust the shape and structure according to the predetermined installation position of the operating box and the connecting rod assembly, so that the installation position of the operating box and the connecting rod assembly can be more flexibly arranged, and the manufacturing cost of the parts is low.

[0016] According to one embodiment, preferably, the connecting rod body includes a first rod, a second rod and a U-shaped connecting member, wherein the first rod and the second rod are respectively fixed to two opposite arms of the U-shaped connecting member. According to the switch cabinet of this embodiment, the connecting rod body has a double-rod structure, and the opposite ends of the first rod and the second rod can be spaced apart at the U-shaped connecting member, so the length of the entire connecting rod body can be adjusted according to the specific layout in the switch cabinet, thereby effectively eliminating interlocking failure caused by errors caused by processing and assembly.

[0017] According to one embodiment, preferably, the biasing member includes one or more springs, the one or more springs are arranged around the connecting rod body, one end of the spring is mounted on the housing and the other end is mounted on the connecting rod body to apply a biasing force to the connecting rod assembly. According to the switch cabinet of this embodiment, the biasing force is applied to the connecting rod body by the arrangement of the spring around the connecting rod body, which effectively saves space in the switch cabinet and reduces the cost of parts manufacturing and assembly.

[0018] According to one embodiment, preferably, the operating box includes a rotary handle, which can be actuated to rotate between an operable position and a closing position, and one end of the pin is rotatably mounted on the radially outer side of the rotary handle, so that the rotation of the rotary handle between the operable position and the closing position drives the pin to move between a first pin position and a second pin position. According to the switch cabinet of this embodiment, the pin is directly connected to the rotary handle that can be operated by an operator, and the rotation position of the rotary handle directly determines the position of the pin, and then determines the locking or unlocking state of the rear door, which effectively ensures the control of the locking and unlocking states of the rear door.

[0019] According to one embodiment, preferably, the pin can also be moved to a third pin position, and when the pin moves to the third pin position, the operating box locks the grounding switch in the open state, and the pin limits the connecting rod assembly to the first connecting rod position. According to the switch cabinet of this embodiment, the grounding switch can be locked in the open state by the operating box, and the operator cannot change the state of the grounding switch in this case, and the rear door is locked in the closed state by the locking component, thereby ensuring the safety of the switch cabinet while more clearly indicating the state of the grounding switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. The drawings are only used to show some embodiments of the present invention, but not to limit all embodiments of the present invention thereto.

[0021] Figure 1 It is a partial perspective view of a switch cabinet according to the utility model.

[0022] Figure 2A This is a side view of the switch cabinet's operating box and earthing switch. Figure 2B It is a top view of the switch cabinet's operating box and grounding switch.

[0023] Figure 3A This is the front view of the switch cabinet operation box. Figure 3B is a perspective view of an operating tool for operating an earthing switch of a switchgear.

[0024] Figure 4A is a perspective view of a portion of the operation box, Figure 4B It is a perspective view of a part of the operation box from another perspective.

[0025] Figure 5 The linkage assembly, mountings and locking components of a switchgear are shown.

[0026] Figure 6 An interlocking plate of a linkage assembly of a switchgear is shown.

[0027] Figure 7A portion of a connecting rod assembly of a switch cabinet including a U-shaped connection is shown.

[0028] Fig. 8A and Figure 8B A device for locking and unlocking a rear door is shown. Fig. 8A In the locking state, the locking part is in the locked state. Figure 8B In the embodiment, the locking part is in the unlocked state.

[0029] Reference numerals list

[0030] 1 switch cabinet, 10 housing, 110 rear door, 120 hook, 121 recess, 130 side plate, 131 support member, 140 mounting member, 141 arc-shaped slide groove, 145 mounting member body, 146 first bending portion, 147 second bending portion, 200 grounding switch, 210 operating tool, 221 operating rod, 222 crank arm, 223 grounding switch main shaft, 300 operating box, 301 outer side wall of operating box, 310 rotating handle, 311 rotating disk of rotating handle, 315 end of rotating handle, 320 pin, 321 first end of pin, 322 second end of pin, 330 operating hole, 341 screw rod, 342 slider, 351 operable Status indication mark, 352 closing status indication mark, 353 opening status indication mark, 500 connecting rod assembly, 501 first end, 502 second end, 510 interlocking plate, 511 receiving hole, 515 mounting portion, 520 push plate, 521 force panel, 525 slide groove, 550 connecting rod body, 551 first rod member, 552 second rod member, 560 U-shaped connecting member, 561 first arm portion, 562 second arm portion, 600 biasing component, 610 spring, 700 locking component, 701 rotation axis, 720 column, 750 slide groove, R1 first connecting rod position, R2 second connecting rod position, L1 locking position, L2 unlocking position. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the technical solution of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described in combination with the drawings of the specific embodiments of the utility model. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not necessarily indicate quantity restrictions. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to direct connections, but may include indirect connections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] The present invention will be described in detail below by describing exemplary embodiments.

[0034] Figure 1 FIG. 1 shows a partial perspective view of a switch cabinet 1 according to the present invention. The switch cabinet 1 includes a housing 10, and corresponding electrical devices of the switch cabinet 1 can be installed on or inside the housing 10. The switch cabinet 1 also includes a rear door 110 that can be opened and closed relative to the housing 10. When the rear door 110 is opened, an operator can access the interior of the switch cabinet 1. Figure 1 A portion of the housing 10 and a portion of the rear door 110 are shown in FIG. Figure 1 Also shown are the grounding switch 200 disposed in the housing 10 and the operating box 300 for operating the grounding switch 200. Figure 1 In the embodiment, the right side of the operation box 300 is the outside of the switch cabinet 1, and the operator can operate the operation box 300 from the outside to switch the grounding switch 200 between the open state and the closed state. A connecting rod assembly 500 is also provided in the housing 10, and the connecting rod assembly 500 has a first end 501 and a second end 502 opposite to each other, the first end 501 is located at one side of the operation box 300, and the second end 502 is located at one side of the rear door 110.

[0035] Figure 2A and Figure 2B The operating box 300 and the grounding switch 200 are shown separately, and the operating box 300 and the grounding switch 200 are connected through the operating rod 221 and the crank arm 222. Figure 1 When the operator manipulates the operating box 300 outside the switch cabinet 1, the operating box 300 successively manipulates the grounding switch 200 through the operating rod 221, the crank arm 222 and the grounding switch main shaft 223, so that the grounding switch 200 is closed or opened. Figure 2A and Figure 2B The structure in which the operating box 300 is used to operate the grounding switch 200 is only an example. According to the present invention, the operating box 300 can also operate the closing and opening of the grounding switch 200 through other structures.

[0036] Figure 3A 3 is a front view of the operation box 300 as viewed from the outside of the switch cabinet 1. In this front view, the outer side wall 301 of the operation box 300 and the end 315 of the rotary handle 310 of the operation box 300 are shown. The rotary handle 310 has a generally cylindrical structure as a whole (see also FIG. Figure 4A and Figure 4B ), which passes through the outer side wall 301 of the operation box 300, so that the end 315 of the rotary handle 310 is located outside the switch cabinet 1. The end 315 can be configured to be easily operated by an operator, for example, the end 315 can have a flat shape (see also Figure 2A and Figure 2B ), the operator can grasp the end 315 to rotate the rotating handle 310. The end 315 can also be provided with a mark to more clearly indicate the rotation angle of the rotating handle 310. In addition, the flat shape of the end 315 itself can also be used to indicate the rotation angle of the rotating handle 310.

[0037] According to the present invention, by rotating the rotary handle 310 to different angles, the grounding switch 200 can be placed in different operation control states. Figure 3A When the handle 310 is rotated relative to the switch cabinet 1, the internal mechanism of the operating box 300 locks the grounding switch 200 in the closed state, that is, the closed state of the grounding switch 200 cannot be changed from the outside of the switch cabinet 1. Figure 3A When the angle shown is rotated 45 degrees counterclockwise (also called the operable position), the internal mechanism of the operating box 300 puts the grounding switch 200 in an operable state, that is, the state of the grounding switch 200 can be switched between closed and open from the outside of the switch cabinet 1. Figure 3A When the angle shown is rotated counterclockwise by 90 degrees (also referred to as the opening position), the internal mechanism of the operating box 300 locks the grounding switch 200 in the opening state, that is, the opening state of the grounding switch 200 is not allowed to be changed from the outside of the switch cabinet 1. Indication marks corresponding to the structure of the end 315 of the rotating handle 310, such as an operable state indication mark 351, a closing state indication mark 352, and an opening state indication mark 353, can be provided on the surface of the outer side wall 301 of the operating box 300 to intuitively indicate the current rotation position of the rotating handle 310.

[0038] According to the present invention, the outer side wall 301 of the operation box 300 is further provided with a through operation hole 330. For example, the operation hole 330 is provided adjacent to the end 315 of the rotating handle 310. Figure 3A When the angle shown in the figure is rotated 45 degrees counterclockwise (i.e. rotated to the operable position), the operator can Figure 3B One end of the operating tool 210 is inserted into the operating hole 330, and the state of the grounding switch 200 is switched between the closed state and the open state. Figure 3A The angle shown in (i.e. the closed position) and relative to Figure 3A When the angle shown in the figure is rotated counterclockwise by 90 degrees (i.e., the opening position), the operating hole 330 is blocked by the internal mechanism of the operating box 300 (for example, by the part of the rotating handle 310 located inside the operating box 300), so that the operating tool 210 cannot be inserted into the operating hole 330 for operation. At the same time, the internal mechanism of the operating box 300 locks the grounding switch 200 in the closing state or the opening state accordingly.

[0039] Figure 4A is a perspective view of a portion of the operation box 300, Figure 4B is a perspective view of a portion of the operation box 300 from another perspective, Figure 4A and Figure 4B The internal components of the operation box 300 are partially shown. Figure 4A In FIG. 3 , the end portion 315 of the rotating handle 310 located outside the operation box 300, the rotating disk 311 located inside the operation box 300, and the main body 312 are further shown. Figure 4B In FIG. 3 , the rotary disk 311 and the main body 312 are shown from another perspective. The rotary disk 311 of the rotary handle 310 and the end 315 of the rotary handle 310 are fixed to each other, and the two can rotate together across the outer side wall 301 of the operation box 300, so that the rotary disk 311 participates in the interlocking control of the rear door 110 of the switch cabinet 1, which will be described in detail later. The main body 312 of the rotary handle 310 participates in the operation control of the grounding switch 200 as described above, and will not be described in detail later.

[0040] Figure 4AThe screw rod 341 and the slider 342 are also shown. When the operating hole 330 is not blocked, one end of the operating tool 210 can be inserted into the operating hole 330 to receive the screw rod 341 and rotate the screw rod 341. For example, the end of the operating tool 210 has a non-circular cross section, and the end of the screw rod 341 close to the operating hole 330 has a hole open toward the operating hole 330, and the hole has a cross-sectional shape corresponding to the aforementioned non-circular cross section of the operating tool 210. The slider 342 is arranged on the screw rod 341, and is driven by the rotation of the screw rod 341 to translate, thereby successively driving the corresponding movements of the operating rod 221, the crank arm 222 and the grounding switch main shaft 223, and finally operating the grounding switch 200 (see also Figure 2A and Figure 2B In other words, when the rotary handle 310 is in the operable position, one end of the operating tool 210 passes through the operating hole 330, is inserted into one end of the screw rod 341, and is operated by the operator from the outside to rotate counterclockwise, for example, so that the grounding switch 200 is switched from closed to open, or the operator rotates the operating tool 210 clockwise, so that the grounding switch 200 is switched from open to closed.

[0041] Figure 4A and Figure 4B Also shown is a pin 320 of the operating box 300. The pin 320 has an elongated structure that extends approximately in the vertical direction. A first end 321 of the pin 320 is rotatably mounted on the radially outer side of the rotating disk 311 of the rotating handle 310 so that the rotation of the rotating handle 310 can drive the movement of the pin 320. A second end 322 of the pin 320 extends downwardly out of the housing of the operating box 300. For example, the lower surface of the housing of the operating box 300 has a corresponding through hole so that the pin 320 can pass through.

[0042] Specifically, Figure 4B The display shows that the rotary handle 310 indicates the closing state (i.e. the rotary handle 310 is in the closing position). Figure 4B In the perspective of FIG, the first end 321 of the pin 320 is located at the upper right corner of the rotating disk 311. Accordingly, when the rotating handle 310 indicates an operable state (ie, the rotating handle 310 is in an operable position), Figure 4B In the perspective of , the first end 321 of the pin 320 will be located at the right end of the rotating disk 311. In addition, when the rotating handle 310 indicates the off state (that is, the rotating handle 310 is in the off position), in Figure 4B, the first end 321 of the pin 320 will be located at the lower right corner of the rotating disk 311. Therefore, when the rotating handle 310 indicates the above three different states, the first end 321 of the pin 320 rotates within a range of approximately 90 degrees on the right side of the rotation axis of the rotating disk 311, so the displacement range of the pin 320 in the horizontal direction is small. In the case where the lower surface of the housing of the operation box 300 is provided with a through hole for the pin 320 to pass through, the size of the through hole is larger than the horizontal displacement range of the pin 320.

[0043] On the other hand, when the rotating handle 310 indicates the above three different states, the displacement range of the pin 320 in the vertical direction is larger than its displacement range in the horizontal direction. Among them, when the rotating handle 310 indicates the closed state, the pin 320 is in the highest position in the vertical direction, and the pin 320 is in the second pin position. When the rotating handle 310 indicates the operable state, the pin 320 is in the middle position in the vertical direction, and the pin 320 is in the first pin position. When the rotating handle 310 indicates the open state, the pin 320 is in the lowest position in the vertical direction, and the pin 320 is in the third pin position. The above-mentioned setting of the pin 320 forms a part of the interlocking mechanism of the switch cabinet 1, so that the grounding switch 200 of the switch cabinet 1 forms a forward and reverse interlock with the rear door 110, as described in detail later.

[0044] Figure 5 The connecting rod assembly 500 is shown separately. The connecting rod assembly 500 is in an elongated shape as a whole, and includes a connecting rod body 550, an interlocking plate 510 and a push plate 520. The connecting rod body 550 is a rod-shaped component, and the interlocking plate 510 and the push plate 520 are respectively fixed to the opposite ends of the connecting rod body 550, the interlocking plate 510 forms the first end 501 of the connecting rod assembly 500, and the push plate 520 forms the second end 502 of the connecting rod assembly 500. Further, the connecting rod body 550 includes a first rod 551, a second rod 552 and a U-shaped connecting member 560, and the U-shaped connecting member 560 fixes the first rod 551 and the second rod 552 to each other, as described in detail later. Therefore, in the illustrated embodiment, the interlocking plate 510 is fixed to one end of the first rod 551, and the push plate 520 is fixed to one end of the second rod 552.

[0045] According to an embodiment of the utility model, the connecting rod assembly 500 is configured to move in a straight line between the first connecting rod position R1 and the second connecting rod position R2. The movement from the first connecting rod position R1 to the second connecting rod position R2 is substantially in the direction from the operation box 300 to the rear door 110, and the movement from the second connecting rod position R2 to the first connecting rod position R1 is substantially in the direction from the rear door 110 to the operation box 300. In particular, the straight line movement of the connecting rod assembly 500 between the first connecting rod position R1 and the second connecting rod position R2 is along the elongation direction of the connecting rod assembly 500 itself.

[0046] Figure 6 The interlocking plate 510 is specifically shown. The interlocking plate 510 includes a mounting portion 515 for fixing to the connecting rod body 550, and the fixing is, for example, screw fixing. The receiving hole 511 is provided in the interlocking plate 510. When installed in the switch cabinet 1 (see Figure 1 ), the receiving hole 511 is through in the vertical direction, and receives the pin 320 only when the rotating handle 310 of the operating box 300 indicates the operable state and the open state. Specifically, when the connecting rod assembly 500 is in the first connecting rod position R1, the pin 320 in the first pin position or the third pin position is at least partially located in the receiving hole 511, and the pin 320 in the second pin position is entirely located above the receiving hole 511 and does not extend into the receiving hole 511, as will be described in detail later. Accordingly, the size of the receiving hole 511 is set to be greater than or equal to the range of movement that the pin 320 can reach in the horizontal direction.

[0047] like Figure 6 As shown, the interlocking plate 510 can be made by bending a single plate, so its shape can be flexibly set according to the position of the operating box 300 in the switch cabinet 1, the position of the pin 320 in the operating box 300 and the position of the connecting rod body 550 in the switch cabinet 1, while the structure is stable and the manufacturing cost is reduced.

[0048] Figure 7 A portion of the connecting rod body 550 is shown, specifically showing a U-shaped connecting member 560 and the corresponding ends of the first rod 551 and the second rod 552 connected thereto. The U-shaped connecting member 560 includes two opposite arms 561 and 562, one end of the first rod 551 is fixedly connected to the first arm 561, and one end of the second rod 552 is fixedly connected to the second arm 562, and the connection can be, for example, a screw connection. In other words, the first rod 551 and the second rod 552 are fixedly connected via the U-shaped connecting member 560. Figure 7As shown, the thinner end section of the first rod 551 passes through the through hole on the first arm 561, and the end section is fixed by nuts on both sides relative to the first arm 561. The end section of the first rod 551 can have a slightly longer length, so that it can pass through the first arm 561 at different distances and still be fixed to the first arm 561 by nuts. The thinner end section of the second rod 552 passes through the through hole on the second arm 562, and the end section can have a slightly shorter length, so that it is fixed by nuts only on the side opposite to the main body of the second rod 552 relative to the second arm 562. Through the above arrangement, a distance can be left between the opposite ends of the first rod 551 and the second rod 552, and the distance can be changed according to the internal size of the switch cabinet 1, the specific positions of the operation box 300 and the rear door 110, so as to ensure the accurate installation of the entire connecting rod assembly 500 in the switch cabinet 1. In other words, by connecting the two rods with the U-shaped connector 560, the entire length of the connecting rod body 550 can be adjusted more flexibly, thereby effectively eliminating interlocking failures caused by part processing and assembly errors. According to an embodiment of the utility model not shown, the second rod 552 can also be fixed to the second arm 562 in the manner of the first rod 551 described above, and alternatively, the first rod 551 can be fixed to the first arm 561 in the manner of the second rod 552 described above.

[0049] Figure 7 Two support members 131 are also shown. The support members 131 are both L-shaped, and one arm of the L-shaped member is fixed to the housing 10, for example, to the side plate 130 of the housing 10 (see also Figure 1 ), the other arm of the L-shape extends away from the housing 10 and is provided with a through hole 132 so that the first rod 551 or the second rod 552 can movably pass therethrough. Figure 7 Also shown are springs 610 respectively sleeved on the first rod 551 and the second rod 552. One end of the corresponding spring 610 is mounted on the first rod 551 or the second rod 552, and the other end is mounted on the corresponding support member 131 to apply a biasing force to the connecting rod body 550. For example, one end of the spring 610 is fixed to the first rod 551 or the second rod 552, and the other end is fixed to the arm portion of the support member 131 where the through hole 132 is provided. Therefore, when the first rod 551, the U-shaped connecting member 560 and the second connecting member 552 move integrally relative to the housing 10, the spring 610 applies a biasing force to the connecting rod body 550, that is, the spring 610 serves as a biasing member 600. Alternatively, as Figure 7Specifically, the spring 610 can be arranged so that its two ends are not fixed to the corresponding rod and the support member 131 respectively, and the two ends of the spring 610 only contact the corresponding rod and the support member 131 respectively. Specifically, the spring 610 is restricted between the flange extending radially from the corresponding rod and the arm portion of the support member 131 provided with the through hole 132. The spring 610 arranged in this way can also be compressed to apply a biasing force to the corresponding rod, while also reducing the assembly cost of the device. According to other embodiments of the utility model, the biasing component 600 can also be other components that apply a biasing force to the connecting rod body 550. Among them, the biasing force biases the connecting rod assembly 500 toward one side of the rear door 110.

[0050] According to an unillustrated embodiment of the present invention, one or more than two springs 610 may be provided, which are also arranged around the connecting rod body 550 , and one end of the spring 610 is fixed to the housing 10 and the other end is fixed to the connecting rod body 550 to apply a biasing force to the connecting rod assembly 500 .

[0051] Fig. 8A and Figure 8B The second end 502 of the connecting rod assembly 500 and its adjacent components are shown. Specifically, Fig. 8A and Figure 8B The push plate 520 , the mounting member 140 , the locking member 700 , and the hook 120 are shown, and these components constitute a locking device for locking and unlocking the rear door 110 .

[0052] First, if Fig. 8A and Figure 8B As shown, the push plate 520 is fixed to one end of the second connecting rod 552 to form the second end 502 of the connecting rod assembly 500. The push plate 520 includes a force panel 521 at its end away from the second connecting rod 552, and the force panel 521 extends perpendicular to the moving direction of the connecting rod assembly 500. The push plate 520 forms two slide grooves 525 on its middle section to cooperate with the mounting member 140 to guide the movement of the connecting rod assembly 500 between the first connecting rod position R1 and the second connecting rod position R2. According to an embodiment of the utility model, the push plate 520 may have one or more slide grooves 525 on its middle section.

[0053] The mounting member 140 is fixedly mounted to the housing 10. The mounting member 140 includes a mounting member body 145, a first bent portion 146, and a second bent portion 147. The mounting member body 145 is fixed to the side plate 130 of the housing 10 and extends parallel to the side plate 130 (see also Figure 1), the first bending portion 146 extends from the mounting member body 145 away from the side plate 130, and the second bending portion 147 extends from the first bending portion 146 toward one side of the operation box 300. The first bending portion 146 is provided with an opening, and the second bending portion 147 is provided with an arc-shaped slide groove 141. The above-mentioned mounting member 140 can be an integrally formed component.

[0054] The hook 120 is fixedly disposed on a side of the rear door 110 facing the link assembly 500 and can pass through the opening of the first bent portion 146. When the hook 120 passes through the opening of the first bent portion 146, the hook 120 can contact the force panel 521 of the push plate 520 at its end away from the rear door 110 and be partially located between the mounting member body 145 and the second bent portion 147. Therefore, the rear door 110 can push the entire link assembly 500 by pushing the force panel 521 with the hook 120. In addition, the hook 120 defines a recess 121, and the recess 121 is formed in the rear door 110. Fig. 8A and Figure 8B In the embodiment, the recess 121 is opened vertically upward.

[0055] like Fig. 8A and Figure 8B As shown, the locking member 700 is rotatably mounted on the mounting member body 145. In other words, the locking member 700 can rotate relative to the housing 10. Fig. 8A and Figure 8B In the embodiment, the locking component 700 is generally C-shaped, and its rotation axis 701 is arranged at a middle position along the C-shaped shape. The locking component 700 is provided with a slide groove 750 at one end closer to the connecting rod assembly 500, and the slide groove 750 cooperates with a part of the push plate 520 (for example, a cylindrical slider fixedly or rotatably arranged on the push plate 520), so that the movement of the connecting rod assembly 500 drives the rotation of the locking component 700. The locking component 700 is provided with a protruding column 720 at one end farther away from the connecting rod assembly 500, and the column 720 moves along the arc segment track as the locking component 700 rotates. The column 720 is received in the arc-shaped slide groove 141 on the second bending portion 147, for example, the end of the column 720 is received in the arc-shaped slide groove 141, so as to better guide the movement of the column 720 and the rotation of the locking component 700 through the arc-shaped slide groove 141. Furthermore, the locking member 700 and the hook 120 are also arranged such that the post 720 can move into and out of the recess 121 as the locking member 700 rotates.

[0056] Fig. 8A The column 720 is shown in the recess 121. Figure 8B The column 720 is shown to be away from the recess 121 and located outside the recess 121. It should be noted that if the column 720 is constrained Fig. 8A , the rear door 110 cannot be opened due to the obstruction of the hook 120 by the column 720. Fig. 8A , the locking member 700 is shown in the locking position L1, and the post 720 is located in the recess 121 defined by the hook 120 to lock the rear door 110 in the closed state. Figure 8B In the position shown, the column 720 does not hinder the opening of the rear door 110. In other words, Figure 8B , the locking member 700 is shown in the unlocking position L2 , and the post 720 leaves the recess 121 to release the lock on the rear door 110 .

[0057] Fig. 8A The situation shown corresponds to the connecting rod assembly 500 being in the first connecting rod position R1, Figure 8B The situation shown corresponds to the connecting rod assembly 500 being in the second connecting rod position R2. Fig. 8A The situation shown is similar to Figure 8B Compared with the situation shown, Fig. 8A The second rod 552 is located further away from the rear door 110. In addition, according to the present invention, Fig. 8A and Figure 8B As shown, the linear movement of the link assembly 500 between the first link position R1 and the second link position R2 corresponds to the rotational position of the locking member 700 between the locking position L1 and the unlocking position L2. In other words, the locking member 700 is configured to be driven by the movement of the link assembly 500 between the first link position R1 and the second link position R2 to switch between the locking position L1 and the unlocking position L2, wherein the locking member 700 locks the rear door 110 in the closed state at the locking position L1 and releases the rear door 110 at the unlocking position L2.

[0058] Next, referring to the accompanying drawings, the interlocking mechanism between the grounding switch 200 and the rear door 110 in the switch cabinet 1 according to the present invention is introduced.

[0059] When the grounding switch 200 in the switch cabinet 1 is in the open state, the rear door 110 should be locked and cannot be opened directly from the outside by the operator. To this end, each device in the switch cabinet 1 is in the following state.

[0060] On the one hand, the grounding switch 200 is in the open state, and the internal mechanism of the operating box 300 is also in the state of locking the grounding switch 200 in the open state. Accordingly, the rotating handle 310 of the operating box 300 is in the open position. Accordingly, the locking pin 320 of the operating box 300 is in the third pin position. On the other hand, the rear door 110 is in the closed state, and the hook 120 fixed to the rear door 110 is in the closed state. Fig. 8AIn the position shown, the link assembly 500 is restricted in the first link position R1 due to the movement restriction of the hook 120 on the force-bearing panel 521. When the link assembly 500 is in the first link position R1, its receiving hole 511 is roughly aligned with the pin 320 along the moving direction of the link assembly 500, so the pin 320 can be in a position passing through the receiving hole 511, specifically, the pin 320 is at least partially located in the receiving hole 511 to be in the third pin position.

[0061] In the above case, since the pin 320 is at least partially located in the receiving hole 511, the link assembly 500 is restricted by the pin 320 at the first link position R1 and cannot move to the second link position R2. Fig. 8A At this time, the locking component 700 is correspondingly in the locking position L1 and cannot be rotated to the unlocking position L2, and the rear door 110 is blocked by the column 720 and cannot be opened.

[0062] If it is desired to open the rear door 110, according to the present invention, it should be ensured that the grounding switch 200 is closed before the rear door 110 is opened. To this end, the following operations are performed to change the states of the devices in the switch cabinet 1.

[0063] First, the operator rotates the rotary handle 310 of the operating box 300, for example, 45 degrees clockwise, to rotate the rotary handle 310 to an operable position. At this time, the internal mechanism of the operating box 300 is changed to a state capable of operating the grounding switch 200. Next, the operator inserts one end of the operating tool 200 into the operating hole 330 of the operating box 300 and rotates it to switch the grounding switch 200 to a closed state.

[0064] Accordingly, when the rotary handle 310 is in the above-mentioned operable position, the locking pin 320 moves to the first pin position. In the first pin position, the locking pin 320 moves up in the vertical direction relative to the third pin position, but the pin 320 is still at least partially located in the receiving hole 511, thereby limiting the connecting rod assembly 500 to the first connecting rod position R1 and unable to move to the second connecting rod position R2. Therefore, the locking component 700 is correspondingly in the locking position L1 and cannot be rotated to the unlocking position L2, and the rear door 110 is blocked by the column 720 and cannot be opened. In other words, when the operator switches the state of the grounding switch 200, the rear door 110 is still unable to be opened, which further ensures the safety of the switch cabinet 1.

[0065] After the operator has switched the grounding switch 200 from the open state to the closed state, the operating tool 210 is removed from the operating hole 330 of the operating box 300, and the operator then rotates the rotary handle 310 to Figure 3AThe closing position shown. At this time, the internal mechanism of the operating box 300 locks the grounding switch 200 in the closing state. Accordingly, the locking pin 320 is in the second pin position, which is further moved up in the vertical direction relative to the first pin position, and the pin 320 is completely moved out of the receiving hole 511, that is, it leaves the receiving hole 511. As a result, the restriction of the pin 320 on the movement of the connecting rod assembly 500 is released, that is, the movement of the connecting rod assembly 500 from the first connecting rod position R1 to the second connecting rod position R2 and the rotation of the locking component 700 from the locking position L1 to the unlocking position L2 are no longer restricted by the pin 320.

[0066] Therefore, after the operator rotates the rotary handle 310 to the closing position, the operator can open the rear door 110 from the outside of the rear door 110. Fig. 8A and Figure 8B In the process of opening the rear door 110, that is, in the process of the hook 120 fixed to the rear door 110 moving to the left, the force-bearing panel 521 of the push plate 520 always abuts against the hook 120 due to the biasing force applied to the connecting rod body 550 by the spring 610, and accordingly, the connecting rod assembly 500 is biased leftward from the first connecting rod position R1 to the second connecting rod position R2, and at the same time, the locking member 700 rotates clockwise from the locking position L1 to the unlocking position L2, and the column 720 moves out of the recess 121 of the hook 120. It should be noted that in the process of opening the rear door 110, the grounding switch 200 is always in the closed state.

[0067] On the other hand, when the connecting rod assembly 500 reaches the second connecting rod position R2, the size of the receiving hole 511 and its position on the interlocking plate 510 should ensure that the receiving hole 511 and the pin 320 are no longer aligned in the moving direction of the connecting rod assembly 500, so that the rotating handle 310 can no longer be rotated to the operable position or further rotated to the opening position, because the pin 320 will be blocked by a part of the connecting rod assembly 500 (for example, blocked by a part of the interlocking plate 510) and cannot reach the first pin position and the third pin position. In some embodiments, when the connecting rod assembly 500 moves away from the first connecting rod position R1 and has not yet reached the second connecting rod position R2, the size of the receiving hole 511 and its position on the interlocking plate 510 ensure that the receiving hole 511 and the pin 320 are no longer aligned in the moving direction of the connecting rod assembly 500. In other words, when the rear door 110 is opened, the operating box 300 cannot be operated to switch the grounding switch 200 to the opening state.

[0068] When the rear door 110 is open, if you want to close the rear door 110 and put the grounding switch 200 in the off state. As can be seen from the above, the rear door 110 can only be closed first, and the state of the grounding switch 200 cannot be changed when the rear door 110 is open. In the process of closing the rear door 110, the hook 120 pushes the force-bearing panel 521 of the push plate 520, thereby moving the connecting rod assembly 500 from the second connecting rod position R2 to the first connecting rod position R1. At the same time, the locking component 700 is driven by the connecting rod assembly 500 to move from the unlocking position L2 to the locking position L1, and the column 720 locks the hook 120. After the connecting rod assembly 500 reaches the first connecting rod position R1, the operator rotates the rotating handle 310 to the operable position, at which time the pin 320 can extend into the receiving hole 511 to reach the first pin position, and the rear door 110 can no longer be opened. Next, the operator inserts one end of the operating tool 210 into the operating hole 330 and switches the grounding switch 200 to the off position, then moves the operating tool 210 out of the operating hole 330, and finally further rotates the rotary handle 310 to the off position. As described above, when the rotary handle 310 is in the off position, the rear door 110 cannot be opened.

[0069] Therefore, through the above-mentioned components and settings of the switch cabinet 1, the forward and reverse interlocking between the rear door 110 of the switch cabinet 1 and the grounding switch 200 can be achieved, that is, the rear door 110 can only be opened when the grounding switch 200 is in the closed state, and the grounding switch 200 can only be opened when the rear door 110 is closed, thereby realizing the "five-protection interlocking" of the switch cabinet to prevent accidental entry into the energized interval, and improving the safety of the switch cabinet.

[0070] According to another embodiment of the utility model, the operating handle 310 of the operating box 300 may not be provided with a separate opening position, and the internal mechanism of the operating box 300 is correspondingly not provided with a state for locking the grounding switch 200 in the opening state. In this case, when the grounding switch 200 is switched to the opening state, the operating handle 310 stays in the operable position, at which time the pin 320 locks the connecting rod assembly 500, so that the rear door 110 is still locked and cannot be opened. Therefore, this embodiment can still achieve the forward and reverse interlocking between the rear door 110 of the switch cabinet 1 and the grounding switch 200.

[0071] According to another embodiment of the utility model, the spring 610 may not be provided on the connecting rod body 550. In this case, the hook 120 fixed to the rear door 110 and the column 720 of the locking member 700 are configured so that when the connecting rod assembly 500 is not restricted by the pin 320, by pulling the rear door 110 outward, the specific shape of the recess 121 of the hook 120 can push the column 720 to slide away from the recess 121, thereby unlocking the rear door 110. For example, the side surface of the recess 121 is configured to be inclined relative to the vertical direction so that the normal direction of the side surface has a vertical upward component. In other words, the opening of the recess 121 can be gradually expanded in the upward direction. In this further embodiment, the movement process of each component caused by closing the rear door 110 is the same as that of the above-mentioned embodiment. The switch cabinet according to this embodiment can have a smaller number of components, and in the embodiment provided with the spring 610, the spring 610 can also make the opening and closing of the rear door 110 smoother. For example, during the opening process of the rear door 110, the spring 610 can indirectly push the rear door 110 and cause the locking component 700 to unlock. During the closing process of the rear door 110, the spring 610 also prevents the connecting rod assembly 500 from being pushed beyond the first connecting rod position R1 by the rear door 110 due to inertia and other reasons.

[0072] The exemplary implementation of the switch cabinet proposed in the present invention is described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present invention, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present invention can be combined in various ways without exceeding the protection scope of the present invention.

Claims

1. A switch cabinet, characterized in that: The switch cabinet (1) comprises a housing (10), a rear door (110) that can be opened and closed relative to the housing, an earthing switch (200) arranged in the housing, and an operating box (300) for operating the earthing switch. A connecting rod assembly (500) is also arranged in the housing (10). The operating box (300) comprises a pin (320), wherein the pin (320) is configured to move between a first pin position and a second pin position. When the pin (320) is in the first pin position, the operating box (300) allows the grounding switch (200) to switch between a closed state and an open state. When the pin (320) is in the second pin position, the operating box (300) locks the grounding switch (200) in the closed state. The link assembly (500) is configured to move linearly between a first link position (R1) and a second link position (R2), wherein when the rear door (110) is opened, the link assembly (500) moves from the first link position (R1) to the second link position (R2), and when the rear door (110) is closed, the link assembly (500) moves from the second link position (R2) to the first link position (R1). When the link assembly (500) is in the first link position (R1), the link assembly (500) allows the pin (320) to move to the first pin position, and when the pin (320) is in the first pin position, the pin (320) restricts the link assembly in the first link position (R1) to lock the rear door (110) in a closed state, when the pin (320) is in the second pin position, the pin (320) releases the restriction on the movement of the link assembly to release the lock of the rear door (110), and when the link assembly (500) is in the second link position (R2), the pin (320) is partially blocked by the link assembly (500) and cannot reach the first pin position.

2. The switch cabinet according to claim 1, characterized in that: The connecting rod assembly has a first end (501) and a second end (502) opposite to each other, the first end (501) is located on one side of the operation box, and the second end (502) is located on one side of the rear door. The connecting rod assembly (500) is provided with a receiving hole (511) at the first end (501). When the connecting rod assembly (500) is in a first connecting rod position (R1) and the pin (320) is in a first pin position, the pin (320) is at least partially located in the receiving hole (511) to limit the connecting rod assembly to the first connecting rod position. When the connecting rod assembly (500) is in the first connecting rod position (R1) and the pin (320) is in the second pin position, the pin (320) leaves the receiving hole (511) to release the restriction on the movement of the connecting rod assembly.

3. The switch cabinet according to claim 1, characterized in that: The switch cabinet (1) also includes a locking component (700), which is configured to be driven by the movement of the connecting rod assembly (500) between the first connecting rod position (R1) and the second connecting rod position (R2) to switch between a locking position (L1) and an unlocking position (L2), wherein the locking component (700) locks the rear door (110) in a closed state in the locking position (L1) and unlocks the rear door (110) in the unlocking position (L2).

4. The switch cabinet according to claim 1, characterized in that: The switch cabinet (1) also includes a biasing component (600), which is configured to apply a biasing force toward the rear door (110) to the connecting rod assembly (500), so that when the connecting rod assembly (500) is not restricted by the pin (320), the connecting rod assembly (500) is biased from the first connecting rod position (R1) to the second connecting rod position (R2) by the biasing component (600) during the process of opening the rear door (110).

5. The switch cabinet according to claim 4, characterized in that: The locking component (700) is disposed on the housing (10) and is rotatable relative to the housing (10), and the movement of the connecting rod assembly (500) drives the rotation of the locking component (700). A protruding column (720) is fixedly provided on the locking component (700), and a hook (120) is fixedly provided on the side of the rear door (110) facing the connecting rod assembly (500), so that when the locking component (700) rotates from the unlocking position (L2) to the locking position (L1), the column (720) moves into a recess (121) defined by the hook (120) to lock the rear door (110) in a closed state, and when the locking component (700) rotates from the locking position (L1) to the unlocking position (L2), the column (720) moves away from the recess (121) to release the lock on the rear door (110).

6. The switch cabinet according to claim 5, characterized in that: The connecting rod assembly (500) includes a connecting rod body (550) and a push plate (520), wherein the push plate (520) is fixed to one end of the connecting rod body (550) and forms a second end portion (502) of the connecting rod assembly, and the push plate (520) includes a force-bearing panel (521) extending perpendicular to the moving direction of the connecting rod assembly (500), and the rear door (110) pushes the force-bearing panel (521) through the hook (120) to push the connecting rod assembly (500).

7. The switch cabinet according to claim 6, characterized in that: The push plate (520) includes a slide groove (525) extending in the moving direction of the connecting rod assembly (500) to guide the movement of the connecting rod assembly (500) between the first connecting rod position (R1) and the second connecting rod position (R2).

8. The switch cabinet according to claim 7, characterized in that: The switch cabinet (1) comprises a mounting member (140) fixedly mounted to a housing (10), wherein the mounting member (140) is provided with an arc-shaped sliding groove (141) for receiving a column (720) of a locking member (700).

9. The switch cabinet according to claim 6, characterized in that: The connecting rod assembly (500) further includes an interlocking plate (510) fixed to one end of the connecting rod body (550) and forming a first end portion (501) of the connecting rod assembly (500), and a receiving hole (511) is provided in the interlocking plate (510).

10. The switch cabinet according to claim 9, characterized in that: The connecting rod body (550) includes a first rod (551), a second rod (552) and a U-shaped connecting member (560), wherein the first rod (551) and the second rod (552) are respectively fixed to two opposite arms of the U-shaped connecting member (560).

11. The switch cabinet according to claim 10, characterized in that: The biasing member (600) includes one or more springs (610) arranged around the connecting rod body (550), one end of the spring (610) being mounted on the housing (10) and the other end being mounted on the connecting rod body (550) to apply a biasing force to the connecting rod assembly (500).

12. The switch cabinet according to claim 1, characterized in that: The operating box (300) includes a rotating handle (310) which can be actuated to rotate between an operable position and a closing position. One end (321) of a pin (320) is rotatably mounted on the radial outer side of the rotating handle (310), so that the rotation of the rotating handle (310) between the operable position and the closing position drives the pin (320) to move between a first pin position and a second pin position.

13. The switch cabinet according to claim 1, characterized in that: The pin (320) can also move to a third pin position (P3). When the pin (320) moves to the third pin position, the operating box (300) locks the grounding switch (200) in an open state, and the pin (320) limits the connecting rod assembly (500) to the first connecting rod position (R1).

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