Mechanical interlocking device of switch cabinet

Abstract

The invention discloses a mechanical interlocking device of a switch cabinet, the switch cabinet comprises a cabinet body, a cabinet door, and a circuit breaker mechanism and an isolation mechanism arranged in the cabinet body, the cabinet door is hung on the cabinet body, the isolation mechanism is provided with a grounding shaft and an isolation shaft, the circuit breaker mechanism is provided with a closing button and a circuit breaker main shaft, the grounding shaft is provided with a first cam, and the isolation shaft is provided with a second cam. The isolation shaft is provided with a second cam, the circuit breaker main shaft is provided with a third cam, the mechanical interlocking device comprises a first interlocking assembly, a second interlocking assembly and a third interlocking assembly, one end of the first interlocking assembly is matched with the outline of the first cam, and the other end of the first interlocking assembly is matched with the cabinet door in a hanging mode; one end of the second interlocking assembly is matched with the contour of the second cam, the other end of the second interlocking assembly is in locking fit with the closing button, one end of the third interlocking assembly is matched with the contour of the third cam, and the other end of the third interlocking assembly is in shielding fit with the isolation shaft. Misoperation of the switch cabinet can be prevented, the reliability of the interlocking mechanism can be improved, and the service life of the interlocking mechanism can be prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical switch cabinets, and more specifically, to a mechanical interlocking device for a switch cabinet. Background Art

[0002] The circuit breakers and disconnectors within a switchgear, as core components for controlling circuit on / off, differ significantly in their functionality. Circuit breakers operate in two states: closed and open, while disconnectors can switch between three positions: connected, isolated, and grounded. Together, they form the fundamental architecture for switchgear circuit control. To ensure operator safety during switchgear operation, in addition to requiring an interlock between the circuit breaker and disconnector, the cabinet door must be opened only when the disconnector is in the grounded position.

[0003] However, current technologies generally employ the addition of electrical interlocking components, such as limit switches and electromagnets, to the switchgear cabinet or door to achieve interlocking between the door and the circuit breaker or disconnector. However, this electrical interlocking solution has significant limitations in practical applications. Especially in harsh environments such as high temperature, humidity, and dust, electrical components are susceptible to environmental factors, significantly shortening their service life. Furthermore, the interlocking system's stability is difficult to guarantee, making it unable to meet the operational requirements of high-reliability power equipment.

[0004] Therefore, it is imperative to design a more reliable cabinet door interlocking solution from the perspective of mechanical structure optimization. The primary challenge facing researchers in this field is how to achieve interlocking between components through mechanical design, eliminate reliance on electrical components, improve the interlocking system's adaptability in harsh environments, and fundamentally enhance the reliability and service life of the interlocking mechanism. Summary of the Invention

[0005] In view of this, the present invention innovatively provides a mechanical interlocking device for a switch cabinet, which solves the problems of unreliability and short service life of existing interlocking devices.

[0006] To achieve the above technical objectives, an embodiment of the present invention discloses a mechanical interlocking device for a switch cabinet, which is applied to a switch cabinet, wherein the switch cabinet includes a cabinet body, a cabinet door, and a circuit breaker mechanism and an isolation mechanism arranged in the cabinet body, the cabinet door is hung on the cabinet body from top to bottom, the isolation mechanism is provided with a grounding shaft and an isolation shaft, the circuit breaker mechanism is provided with a closing button and a circuit breaker main shaft, the grounding shaft is provided with a first cam, the isolation shaft is provided with a second cam, and the circuit breaker main shaft is provided with a third cam, the mechanical interlocking device includes a first interlocking component, a second interlocking component and a third interlocking component, one end of the first interlocking component cooperates with the first cam profile, the other end of the first interlocking component cooperates with the cabinet door, and the first interlocking component is provided at the first interlocking component. When a cam is in the isolation position, the cabinet door is pressed against the cabinet body. When the first cam is in the connection position, the first interlock component releases the pressing effect on the cabinet door. One end of the second interlock component cooperates with the second cam profile, and the other end of the second interlock component cooperates with the closing button stop. The second interlock component blocks the closing button from being pressed when the second cam is in the isolation position, and the second interlock component releases the blocking effect on the closing button when the second cam is in the connection position. One end of the third interlock component cooperates with the third cam profile, and the other end of the third interlock component cooperates with the isolation shaft block. The third interlock component blocks the isolation shaft when the third cam is in the closing position, and releases the blocking effect on the isolation shaft when the third cam is in the opening position.

[0007] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the first interlocking assembly includes a support frame, an interlocking rod and a first interlocking plate, the support frame is in the shape of an "X" shape, the two ends of the "X" shape are fixedly connected to the cabinet body, a guide hole is provided in the middle of the "X" shape, the interlocking rod is vertically arranged in the guide hole of the support frame, the lower end of the outer peripheral wall of the interlocking rod is provided with an annular hanging groove, the cabinet door is hung on the hanging groove of the interlocking rod, the upper end of the interlocking rod is fixedly connected to the first interlocking plate, and the first interlocking plate cooperates with the first cam profile.

[0008] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein a pin shaft hole passing through the middle of the interlocking rod is provided, the pin shaft hole is located on the upper side of the support frame, a limit pin is fixed in the pin shaft hole, both ends of the limit pin pass through the two sides of the pin shaft hole, a reset spring is sleeved on the interlocking rod between the limit pin and the support frame, the upper end of the reset spring is against the limit pin, and the lower end of the reset spring is against the upper surface of the support frame.

[0009] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the first interlocking plate includes a connecting portion, a bending portion, a folding portion and a shielding portion, the connecting portion extends from bottom to top and is fixedly connected to the interlocking rod, the bending portion extends from front to back and is vertically connected to the upper end of the connecting portion, the folding portion extends from back to front, the rear half of the folding portion overlaps with the bending portion, the front half of the folding portion exceeds the connecting portion, the upper surface of the folding portion cooperates with the first cam profile, the shielding portion extends from bottom to top, the shielding portion is vertically connected to the front end of the folding portion, and the shielding portion blocks the grounding shaft under the action of a reset spring when the first cam is in the grounding position.

[0010] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the second interlocking assembly includes a second interlocking plate and a first tension spring, the second interlocking plate is slidably arranged between the isolation mechanism and the circuit breaker mechanism, one end of the second interlocking plate cooperates with the second cam profile of the isolation shaft, and the second interlocking plate is pushed to slide by the second cam, one end of the first tension spring is fixed in the middle of the second interlocking plate, and the other end of the first tension spring is fixed on the circuit breaker mechanism, when the second cam is in the isolation position, the second cam pushes the second interlocking plate to slide, so that the second interlocking plate is engaged with the closing button, and the first tension spring is stretched, when the second cam is in the connection position, the first tension spring resets and pulls the second interlocking plate to slide, so that the second interlocking plate is separated from the closing button.

[0011] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the second interlocking plate is provided with a plurality of first guide grooves, and the second interlocking plate is slidably connected to first support columns respectively fixed on the circuit breaker mechanism and the isolation mechanism through the first guide grooves.

[0012] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the third interlocking assembly includes a third interlocking plate and a second tension spring, the third interlocking plate is slidably arranged between the isolation mechanism and the circuit breaker mechanism, one end of the third interlocking plate cooperates with the third cam profile of the circuit breaker main shaft, and the third cam pushes the second interlocking plate to slide, one end of the second tension spring is fixed to the middle of the third interlocking plate, and the other end of the second tension spring is fixed to the circuit breaker mechanism, when the third cam is in the closed position, the third cam pushes the third interlocking plate to slide, so that the third interlocking plate blocks the isolation shaft, and the second tension spring is stretched, when the third cam is in the open position, the second tension spring resets and pulls the third interlocking plate to slide, so that the third interlocking plate releases the blocking effect on the isolation shaft.

[0013] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein the third interlocking plate is provided with a plurality of second guide grooves, and the third interlocking plate is slidably connected to second support columns respectively fixed on the circuit breaker mechanism and the isolation mechanism through the second guide grooves.

[0014] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, which also includes an electromagnetic lock and a fourth interlock plate. The electromagnetic lock includes an electromagnetic lock body, a shift block and a push rod. The electromagnetic lock body is electrically connected to the outlet bushing in the cabinet body, one end of the push rod is connected to the shift block, and the other end of the push rod is connected to the fourth interlock plate. When the electromagnetic lock body is energized, the shift block cannot be moved, and the fourth interlock plate blocks the grounding shaft. When the electromagnetic lock body is not energized, the shift block can be moved to pull the fourth interlock plate through the push rod to release the blocking effect on the grounding shaft.

[0015] Furthermore, the present invention provides a mechanical interlocking device for a switch cabinet, wherein a hanging plate is provided on the cabinet door, the hanging plate is in a "F" shape, a side through groove is provided in the middle of the hanging plate for engaging with the hanging groove of the interlocking rod, and a plurality of mounting grooves for hanging cabinet doors are provided on both side panels of the cabinet body, and the mounting grooves extend forward from the side openings of the side panels and then extend downward to form an inverted L-shaped groove.

[0016] The beneficial effects of the present invention are as follows: interlocking control between the circuit breaker mechanism and the isolation mechanism, and between the isolation mechanism and the cable compartment door is realized through the mechanical interlocking device, which fundamentally ensures operational safety. The switch cabinet meets the "five protection" requirements and forms triple safety protection through the mechanical transmission structure: blocking the malfunction sequence of the circuit breaker and the isolation mechanism; locking the operational association between the cable compartment door and the isolation mechanism; and constructing a misoperation barrier at the mechanical structure level to effectively prevent safety hazards caused by misoperation. The mechanical transmission logic is optimized to make the operation process simpler, taking into account the operational efficiency of the operation and maintenance personnel, and forming safety protection through the interlocking mechanism. When the isolation mechanism is in a non-fully grounded state, the cabinet door cannot be opened, thereby eliminating the risk of maintenance personnel mistakenly entering the energized area, and the present invention can be widely applied to switch cabinets and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of a mechanical interlocking device of a switch cabinet according to the present invention;

[0018] Figure 2 This is a schematic diagram of the right side structure of a mechanical interlocking device of a switch cabinet according to the present invention;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of a mechanical interlocking device of a switch cabinet according to the present invention;

[0020] Figure 4 The figure is a schematic diagram of the three-dimensional structure of a first interlocking plate in a mechanical interlocking device of a switch cabinet according to the present invention. DETAILED DESCRIPTION

[0021] The mechanical interlocking device of a switch cabinet of the present invention is explained and illustrated in detail below with reference to the accompanying drawings.

[0022] like Figure 1As shown, an embodiment of the present invention discloses a mechanical interlocking device for a switch cabinet, which is applied to a switch cabinet. The switch cabinet includes a cabinet body 1, a cabinet door 4, and a circuit breaker mechanism 2 and an isolation mechanism 3 arranged in the cabinet body 1. The cabinet door 4 is hung on the cabinet body 1 from top to bottom. The isolation mechanism 3 is provided with a grounding shaft and an isolation shaft. The grounding shaft is used for the grounding and isolation operation of the isolation switch, and the isolation shaft is used for the connection and isolation operation of the isolation switch. The circuit breaker mechanism 2 is provided with a closing button 21, a circuit breaker main shaft (i.e., an energy storage shaft), and an opening button, etc. A first cam 31 is provided on the grounding shaft, a second cam 32 is provided on the isolating shaft, and a third cam 22 is provided on the circuit breaker main shaft. This means that the first cam 31 rotates with the grounding shaft, the second cam 32 rotates with the isolating shaft, and the third cam 22 rotates with the circuit breaker main shaft. The grounding shaft has a grounding position and an isolating position, and the first cam 31 also has a grounding position and an isolating position. The isolating shaft has an isolating position and an on position, and the second cam 32 also has an isolating position and an on position. The circuit breaker main shaft has an open position and a closed position, and the third cam 22 also has an open position and a closed position. The mechanical interlocking device that cooperates with the isolating mechanism 3 and the circuit breaker mechanism 2 includes a first interlocking assembly 5, a second interlocking assembly 6, and a third interlocking assembly 7. In actual use, the cabinet door 4 is hung on the cabinet body 1 from top to bottom, and one end of the first interlock component 5 cooperates with the contour of the first cam 31, that is, the first interlock component 5 can be interlocked due to the rotation of the first cam 31, and the other end of the first interlock component 5 is hung and cooperated with the cabinet door 4. The first interlock component 5 presses the cabinet door 4 against the cabinet body 1 when the first cam 31 is in the isolation position, so that the cabinet door 4 cannot be removed from the cabinet body 1, thereby preventing personnel from entering the switch cabinet during the switching operation or when the switch cabinet is energized. The first interlock component 5 releases the tightening effect on the cabinet door 4 when the first cam 31 is in the grounding position. At this time, the isolating switch is in a reliably grounded state, and the mechanism room and cable room in the switch cabinet are not energized. The first interlock component 5 will not hinder the cabinet door 4 from being pulled upward to complete the disassembly, which can fully ensure the safety of the maintenance personnel's operation. One end of the second interlocking assembly 6 cooperates with the contour of the second cam 32, that is, the second interlocking assembly 6 can be interlocked due to the rotation of the second cam 32, and the other end of the second interlocking assembly 6 cooperates with the closing button 21 stop. The second interlocking assembly 6 blocks the closing button 21 from being pressed when the second cam 32 is in the isolation position, thereby preventing the disconnector from accidentally closing the circuit breaker in the isolation position. The second interlocking assembly 6 releases the blocking effect on the closing button 21 when the second cam 32 is in the connection position, thereby ensuring that the circuit breaker can be closed only when the disconnector is in the closed state, thereby preventing the circuit breaker from being accidentally opened and closed.One end of the third interlocking component 7 cooperates with the contour of the third cam 22, that is, the third interlocking component 7 can be interlocked due to the rotation of the third cam 22, and the other end of the third interlocking component 7 cooperates with the isolation shaft shielding. The third interlocking component 7 blocks the isolation shaft when the third cam 22 is in the closed position, so as to ensure that the isolation mechanism 3 cannot be operated when the circuit breaker is closed, thereby preventing the disconnector from being opened incorrectly. The third interlocking component 7 releases the shielding effect on the isolation shaft when the third cam 22 is in the open position, so that the disconnecting operation from the connected position to the isolated position of the disconnector can be performed only when the circuit breaker is in the open state, thereby effectively preventing the disconnector from being opened and closed incorrectly.

[0023] In this embodiment, interlocking control between the circuit breaker mechanism 2 and the isolation mechanism 3, and between the isolation mechanism 3 and the cable compartment door is achieved through a mechanical interlocking device, which fundamentally ensures operational safety. The switch cabinet meets the "five protection" requirements and forms a triple safety protection through the mechanical transmission structure: blocking the erroneous operation sequence of the circuit breaker and the isolation mechanism 3; locking the operational association between the cable compartment door and the isolation mechanism 3; and constructing a misoperation barrier at the mechanical structure level to effectively prevent safety hazards caused by misoperation. The mechanical transmission logic is optimized to make the operation process simpler, taking into account the operational efficiency of the operation and maintenance personnel, and forming safety protection through the interlocking mechanism. When the isolation mechanism 3 is in a non-fully grounded state, the cabinet door 4 cannot be opened, thereby eliminating the risk of maintenance personnel mistakenly entering the energized area, and the present invention can be widely applied to switch cabinets and has a long service life.

[0024] In one embodiment of the present invention, the first interlocking assembly 5 includes a support frame 51, an interlocking rod 52, and a first interlocking plate 53. The support frame 51 is in the shape of an "X" (a cross), with both ends of the "X" (a cross) fixedly connected to the cabinet body 1. A guide hole is provided in the middle of the "X" (i.e., the center of the "X"-shaped protrusion), and the interlocking rod 52 is vertically arranged in the guide hole of the support frame 51. The lower end of the outer peripheral wall of the interlocking rod 52 is provided with an annular hanging groove 521, and the cabinet door 4 is hung on the hanging groove 521 of the interlocking rod 52. The upper end of the interlocking rod 52 is fixedly connected to the first interlocking plate 53, and the first interlocking plate 53 matches the contour of the first cam 31. In actual use, the interlocking rod 52 is lifted upward so that the cabinet door 4 is hooked on the lower end of the interlocking rod 52 through the hanging slot 521. When the first cam 31 is switched from the connected position to the isolated position, the profile of the first cam 31 cooperates with the upper surface of the first interlocking plate 53, and the first cam 31 pushes the first interlocking plate 53 downward, causing the interlocking rod 52 to move downward, pressing the cabinet door 4 against the cabinet body 1. The cabinet door 4 cannot move upward, so the cabinet door 4 cannot be removed, achieving the purpose of preventing the cabinet door 4 from being removed when the switch cabinet is not grounded. When the first cam 31 is switched from the isolated position to the connected position, the first cam 31 applies a tightening force to the cabinet door 4, allowing the cabinet door 4 to move upward, so that the cabinet door 4 can be removed, achieving the purpose of ensuring that the switch cabinet is reliably grounded before the cabinet door 4 can be removed.

[0025] To reduce manual operation and simplify the operation process, a pin hole is provided in the middle of the interlocking rod 52, which runs through the rod. The pin hole is located on the upper side of the support frame 51. A limit pin 54 is fixed in the pin hole, with both ends of the limit pin 54 extending from either side of the pin hole. A return spring 55 is sleeved on the interlocking rod 52 between the limit pin 54 and the support frame 51. The upper end of the return spring 55 abuts against the limit pin 54, while the lower end of the return spring 55 abuts against the upper surface of the support frame 51. In the natural state, the cabinet door 4 is just hooked to the lower end of the interlocking rod 52 through the hanging groove 521. When the first cam 31 switches from the engagement position to the isolation position, the return spring 55 is compressed. When the first cam 31 switches from the isolation position to the engagement position, the return spring 55 returns to its natural state, waiting for the next hooking of the cabinet door 4. This simplifies the operation process of first lifting the interlocking rod 52 and then hooking the cabinet door 4.

[0026] Based on the above embodiments, Figure 4 As shown, the first interlocking plate 53 includes a connecting portion 531, a bent portion 532, a folded portion 533, and a shielding portion 534. The connecting portion 531 extends from bottom to top and is fixedly connected to the interlocking rod 52. The bent portion 532 extends from front to back and is perpendicularly connected to the upper end of the connecting portion 531. The folded portion 533 extends from back to front, with the rear half of the folded portion 533 overlapping the bent portion 532, so that the bent portion 532 provides support for the rear half of the folded portion 533. The front half of the folded portion 533 extends beyond the connecting portion 531, and the upper surface of the folded portion 533 aligns with the contour of the first cam 31. The shielding portion 534 extends from bottom to top and is perpendicularly connected to the front end of the folded portion 533. When the first cam 31 is in the grounding position, the shielding portion 534, under the action of the return spring 55, shields the grounding shaft. The above arrangement can achieve the purpose of being unable to operate the grounding shaft without installing the cabinet door 4, being unable to operate the grounding shaft after the cabinet door 4 is removed, and being unable to remove the cabinet door 4 when the switch cabinet is not grounded.

[0027] like Figure 3As shown, in one embodiment of the present invention, the second interlock assembly 6 includes a second interlock plate 61 and a first tension spring 62. The second interlock plate 61 is slidably disposed between the isolation mechanism 3 and the circuit breaker mechanism 2. One end of the second interlock plate 61 mates with the contour of the second cam 32 of the isolation shaft, and the second cam 32 pushes the second interlock plate 61 to slide. One end of the first tension spring 62 is fixed to the middle of the second interlock plate 61, and the other end of the first tension spring 62 is fixed to the circuit breaker mechanism 2. When the second cam 32 is in the isolation position, the second cam 32 pushes the second interlock plate 61 to slide, causing the second interlock plate 61 to engage with the closing button 21. The front end of the closing button 21 is provided with a circular plate similar to a boss. After the second interlock plate 61 engages with the closing button 21, the second interlock plate 61 is located behind the circular plate, so that the closing button 21 cannot be pressed. This prevents the circuit breaker from being accidentally closed when the isolation switch is in the off state. When the second cam 32 is in the isolation position, the first tension spring 62 is stretched. When the second cam 32 is in the connection position, the first tension spring 62 resets, pulling the second interlock plate 61 to slide, separating the second interlock plate 61 from the closing button 21. This ensures that the circuit breaker can only be closed when the disconnector is in the connection position. The second interlock plate 61 is provided with a plurality of first guide slots 611. These first guide slots 611 allow the second interlock plate 61 to be slidably connected to the first support posts 63, respectively fixed to the circuit breaker mechanism 2 and the isolation mechanism 3. The provision of multiple first guide slots 611 ensures the stability of the sliding connection of the second interlock plate 61.

[0028] like Figure 3 As shown, in one embodiment of the present invention, the third interlock assembly 7 includes a third interlock plate 71 and a second tension spring 72. The third interlock plate 71 is slidably disposed between the isolation mechanism 3 and the circuit breaker mechanism 2. One end of the third interlock plate 71 mates with the contour of the third cam 22 on the circuit breaker main shaft, and the third cam 22 pushes the second interlock plate 61 to slide. One end of the second tension spring 72 is fixed to the middle of the third interlock plate 71, and the other end of the second tension spring 72 is fixed to the circuit breaker mechanism 2. When the third cam 22 is in the closed position, the third cam 22 pushes the third interlock plate 71 to slide, causing it to block the isolation shaft. This prevents the disconnector from accidentally opening when under load. When the third cam 22 is in the closed position, the second tension spring 72 is stretched. When the third cam 22 is in the open position, the second tension spring 72 resets, pulling the third interlock plate 71 to slide, releasing its blocking effect on the isolation shaft. This ensures that the disconnector can be opened only when the circuit breaker is open. In addition, a plurality of second guide grooves 711 are provided on the third interlocking plate 71, and the third interlocking plate 71 is slidably connected to the second support columns 73 respectively fixed on the circuit breaker mechanism 2 and the isolation mechanism 3 through the second guide grooves 711. By providing a plurality of second guide grooves 711, the stability of the sliding connection of the third interlocking plate 71 can be ensured.

[0029] like Figure 3As shown, in one embodiment of the present invention, an electromagnetic lock 8 and a fourth interlock plate 9 are further included. The electromagnetic lock 8 includes an electromagnetic lock body 81, a dial block 82 and a push rod 83. The electromagnetic lock body 81 is electrically connected to the outlet bushing in the cabinet 1. One end of the push rod 83 is connected to the dial block 82, and the other end of the push rod 83 is connected to the fourth interlock plate 9. When the electromagnetic lock body 81 is energized, the dial block 82 cannot be moved. The fourth interlock plate 9 blocks the grounding shaft. When the electromagnetic lock body 81 is not energized, the dial block 82 cannot be moved. When the switch cabinet is energized (i.e. the outlet bushing is energized), the grounding shaft is blocked by the fourth interlocking plate 9. After that, the switch cabinet can be de-energized only when the switch cabinet is de-energized and the push rod 83 is used to pull the fourth interlocking plate 9 to release the blocking effect on the grounding shaft. Therefore, the above arrangement can prevent the grounding shaft from being operated accidentally when the isolating shaft and the circuit breaker mechanism 2 are operated, thereby achieving the purpose of preventing power from being supplied in the grounding state.

[0030] like Figure 2 As shown, in one embodiment of the present invention, a hanging plate 41 is provided on the cabinet door 4, and the hanging plate 41 is in a "F" shape. The middle part of the hanging plate 41 is provided with a side through groove 411 that is engaged with the hanging groove 521 of the interlocking rod 52. Both side panels of the cabinet body 1 are provided with a plurality of mounting grooves 11 for hanging the cabinet door 4. The mounting groove 11 extends forward from the side opening of the side panel and then extends downward to form an inverted L-shaped groove. Through the above structure, the cabinet door 4 cannot be easily removed after being pressed, thereby achieving the purpose of preventing electric power from entering the internal space of the switch cabinet and protecting the safety of maintenance personnel.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and simple improvements made to the essential contents of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical interlocking device for a switch cabinet, applied to a switch cabinet, comprising a cabinet body, a cabinet door, and a circuit breaker mechanism and an isolation mechanism disposed within the cabinet body. The cabinet door is hung from top to bottom on the cabinet body. The isolation mechanism is provided with a grounding shaft and an isolation shaft. The circuit breaker mechanism is provided with a closing button and a circuit breaker main shaft. The device is characterized in that: A first cam is provided on the grounding shaft, a second cam is provided on the isolation shaft, and a third cam is provided on the circuit breaker main shaft. The mechanical interlock device includes a first interlock assembly, a second interlock assembly, and a third interlock assembly. One end of the first interlock assembly cooperates with the first cam profile, and the other end of the first interlock assembly cooperates with the cabinet door. The first interlock assembly presses the cabinet door against the cabinet body when the first cam is in the isolation position, and releases the pressing effect on the cabinet door when the first cam is in the connection position. One end of the second interlock assembly cooperates with the second cam profile, and the other end of the second interlock assembly cooperates with the closing button stop. The second interlock assembly blocks the closing button from being pressed when the second cam is in the isolation position, and releases the blocking effect on the closing button when the second cam is in the connection position. One end of the third interlock assembly cooperates with the third cam profile, and the other end of the third interlock assembly cooperates with the isolation shaft to block the isolation shaft. The third interlock assembly blocks the isolation shaft when the third cam is in the closing position, and releases the blocking effect on the isolation shaft when the third cam is in the opening position.

2. The mechanical interlocking device of a switch cabinet according to claim 1, characterized in that: The first interlocking assembly includes a support frame, an interlocking rod and a first interlocking plate. The support frame is in the shape of an "X" shape, and the two ends of the "X" shape are fixedly connected to the cabinet body. A guide hole is provided in the middle of the "X" shape. The interlocking rod is vertically arranged in the guide hole of the support frame. The lower end of the outer peripheral wall of the interlocking rod is provided with an annular hanging groove. The cabinet door is hung on the hanging groove of the interlocking rod. The upper end of the interlocking rod is fixedly connected to the first interlocking plate, and the first interlocking plate cooperates with the first cam profile.

3. The mechanical interlocking device of a switch cabinet according to claim 2, characterized in that: The middle part of the interlocking rod is provided with a pin shaft hole passing through it, and the pin shaft hole is located on the upper side of the support frame. A limit pin is fixed in the pin shaft hole, and both ends of the limit pin pass through the two sides of the pin shaft hole. A reset spring is sleeved on the interlocking rod between the limit pin and the support frame, and the upper end of the reset spring is against the limit pin, and the lower end of the reset spring is against the upper surface of the support frame.

4. The mechanical interlocking device of a switch cabinet according to claim 3, characterized in that: The first interlocking plate includes a connecting portion, a bending portion, a folding portion and a shielding portion, the connecting portion extends from bottom to top and is fixedly connected to the interlocking rod, the bending portion extends from front to back and is vertically connected to the upper end of the connecting portion, the folding portion extends from back to front, the rear half of the folding portion overlaps with the bending portion, the front half of the folding portion exceeds the connecting portion, the upper surface of the folding portion cooperates with the first cam profile, the shielding portion extends from bottom to top, the shielding portion is vertically connected to the front end of the folding portion, and the shielding portion blocks the grounding shaft under the action of the reset spring when the first cam is in the grounding position.

5. The mechanical interlocking device of a switch cabinet according to claim 4, characterized in that: The second interlock component includes a second interlock plate and a first tension spring. The second interlock plate is slidably disposed between the isolating mechanism and the circuit breaker mechanism. One end of the second interlock plate cooperates with the second cam profile of the isolating shaft, and the second cam pushes the second interlock plate to slide. One end of the first tension spring is fixed to the middle of the second interlock plate, and the other end of the first tension spring is fixed to the circuit breaker mechanism. When the second cam is in the isolating position, the second cam pushes the second interlock plate to slide, so that the second interlock plate is clamped with the closing button, and the first tension spring is stretched. When the second cam is in the closed position, the first tension spring resets and pulls the second interlock plate to slide, so that the second interlock plate is separated from the closing button.

6. The mechanical interlocking device of a switch cabinet according to claim 5, characterized in that: A plurality of first guiding grooves are provided on the second interlock plate, and the second interlock plate is slidably connected to the first support columns respectively fixed on the circuit breaker mechanism and the isolating mechanism through the first guiding grooves.

7. The mechanical interlocking device of a switch cabinet according to claim 6, characterized in that: The third interlock component includes a third interlock plate and a second tension spring. The third interlock plate is slidably disposed between the isolating mechanism and the circuit breaker mechanism. One end of the third interlock plate cooperates with the third cam profile of the main shaft of the circuit breaker, and the third cam pushes the third interlock plate to slide. One end of the second tension spring is fixed to the middle of the third interlock plate, and the other end of the second tension spring is fixed to the circuit breaker mechanism. When the third cam is in the closing position, the third cam pushes the third interlock plate to slide, so that the third interlock plate blocks the isolating shaft, and the second tension spring is stretched. When the third cam is in the opening position, the second tension spring resets and pulls the third interlock plate to slide, so that the third interlock plate releases the blocking effect on the isolating shaft.

8. The mechanical interlocking device of a switch cabinet according to claim 7, characterized in that: A plurality of second guiding grooves are provided on the third interlock plate, and the third interlock plate is slidably connected to the second support columns respectively fixed on the circuit breaker mechanism and the isolating mechanism through the second guiding grooves.

9. The mechanical interlocking device of a switch cabinet according to claim 8, characterized in that: It further includes an electromagnetic lock and a fourth interlock plate. The electromagnetic lock includes an electromagnetic lock body, a dial block and a push rod. The electromagnetic lock body is electrically connected to the outgoing line sleeve in the cabinet. One end of the push rod is connected to the dial block, and the other end of the push rod is connected to the fourth interlock plate. When the electromagnetic lock body is charged, the dial block cannot be toggled, and the fourth interlock plate blocks the grounding shaft. When the electromagnetic lock body is not charged, the dial block can be toggled to pull the fourth interlock plate through the push rod to release the blocking effect on the grounding shaft.

10. The mechanical interlocking device of a switch cabinet according to claim 9, characterized in that: A hanging plate is provided on the cabinet door. The hanging plate is in a U-shape. A side through groove for engaging with the hanging groove of the interlock rod is provided in the middle of the hanging plate. A plurality of mounting grooves for hanging the cabinet door are provided on both side plates of the cabinet. The mounting groove extends forward first and then downward from the side opening of the side plate to form an inverted L-shaped groove.

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