Cubicle door grounding interlocking device for switch cabinet and switch cabinet with same

Abstract

The utility model relates to a cabinet door grounding interlocking device for switch cabinet and switch cabinet with it, cabinet door grounding interlocking device includes: locking part, it includes first locking piece and with first locking piece engagement to lock this cabinet door to the closed position second locking piece, transmission part, it includes the first transmission piece that extends transversely to second locking piece and the second transmission piece that extends transversely to first transmission piece and via first transmission piece with second locking piece linkage, limit piece, it is adjacent second transmission piece away from the end of first transmission piece arrangement to limit the movement of second transmission piece, position switch, with the electric operation mechanism electric connection of this grounding switch, wherein limit piece is configured to avoid second transmission piece when moving to grounding position with grounding switch, to allow second transmission piece can move and drive position switch switches to the off state in response to the unlocking action of second locking piece via first transmission piece, thereby limiting the electric operation of electric operation mechanism of grounding switch.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a cabinet door grounding interlock device for switchgear and a switchgear having the same. Background Technology

[0002] Switchgear, such as gas-insulated switchgear, is widely used in medium and high voltage power distribution systems for control and protection due to its advantages of full enclosure, maintenance-free operation, and high reliability. Switchgear typically includes multiple functional modules such as busbar equipment cabinets, busbar section cabinets, and circuit breaker cabinets. The busbar equipment cabinet may integrate critical electrical equipment such as voltage transformers and surge arresters. To ensure the safety of maintenance personnel when performing maintenance work on the equipment inside the busbar equipment cabinet, existing switchgear technology requires that the grounding switch be operated to ground the equipment inside the cabinet before opening the cabinet door, and that the grounding switch be operated to open the cabinet only after the cabinet door is closed, thus energizing the busbar equipment cabinet. However, existing switchgear technology either lacks an interlocking device between the cabinet door and the grounding switch, or the interlocking device has drawbacks such as large space requirements and complex structures.

[0003] Therefore, there is a need in this field for a compact and simple cabinet door grounding interlocking device. Utility Model Content

[0004] The present invention aims to provide a cabinet door grounding interlocking device for switchgear that can at least solve some of the above-mentioned problems.

[0005] This utility model also aims to provide a switch cabinet that applies the above-mentioned improved cabinet door grounding interlocking device.

[0006] According to one aspect of the present invention, a cabinet door grounding interlocking device for a switchgear is provided. The switchgear includes a cabinet body, a cabinet door movably installed to the cabinet body, and a grounding switch. The cabinet door grounding interlocking device includes: a locking component, comprising a first locking member installed to the inside of the cabinet door and a second locking member movably installed to the inside of the cabinet body and engaging with the first locking member to lock the cabinet door to a closed position; a transmission component, comprising a first transmission member extending laterally to the second locking member and a second transmission member extending laterally to the first transmission member and linked with the second locking member via the first transmission member; and a limiting member adjacent to the second locking member. The second transmission member is arranged at its end away from the first transmission member to restrict the movement of the second transmission member. The limiting member is fixedly installed to the grounding switch and can move with the grounding switch. A position switch is fixedly installed in the cabinet and electrically connected to the electric operating mechanism of the grounding switch. The limiting member is configured to avoid the second transmission member when it moves to the grounding position with the grounding switch, so as to allow the second transmission member to move via the first transmission member in response to the unlocking action of the second locking member and drive the position switch to the off state, thereby restricting the electric operation of the electric operating mechanism of the grounding switch.

[0007] Compared with existing technologies, the cabinet door grounding interlocking device provided by this utility model can interlock the cabinet door and the grounding switch, ensuring that various equipment inside the cabinet can only be inspected and maintained after the switch cabinet is grounded, thereby protecting the personal safety of operators. Furthermore, the transmission component of this cabinet door grounding interlocking device, arranged between the locking component and the limiting component, includes a first transmission component and a second transmission component extending in different directions. This allows the cabinet door grounding interlocking device of this utility model to be applied to application scenarios where the grounding switch and the cabinet door are misaligned, thus expanding its applicability.

[0008] Preferably, the cabinet door grounding interlock device further includes a door limiting member arranged on the second transmission member and extending in a direction transverse to the extension direction of the second transmission member. The door limiting member can be driven by the second transmission member to engage with the manual operation mechanism of the grounding switch to restrict the manual operation of the manual operation mechanism of the grounding switch.

[0009] Preferably, the limiting member is designed as a disc structure fixedly sleeved on the operating spindle of the grounding switch, and the outer periphery of the disc is provided with an clearance opening that allows the second transmission member to move in.

[0010] Preferably, the second locking member and the second transmission member extend in the same direction, and both ends of the first transmission member are connected to the second locking member and the second transmission member via crank arms.

[0011] Preferably, the position switch includes a support frame mounted to the cabinet and a switch body mounted to the support frame, wherein the support frame is provided with a guide hole that allows the second transmission member to pass through.

[0012] Preferably, the second transmission member includes a transmission rod extending in a direction transverse to the extension direction of the first transmission member and a switching plate disposed on the transmission rod and extending transversely to the transmission rod, the switching plate engaging the switch body to put the switch body in a conducting state.

[0013] Preferably, the first transmission member is installed to the cabinet via a transmission reset member, so that the first transmission member can overcome the movement of the transmission reset member in response to the unlocking action of the second transmission member.

[0014] Preferably, the locking component further includes a retaining member elastically mounted to the cabinet, the retaining member being biased by the second locking member and engaging with a retaining groove on the second locking member under the action of a reset elastic force after the second locking member moves to the unlock position.

[0015] Preferably, the second locking member is designed as an elongated structure, and the first locking member is designed as a plate-like structure that allows the second locking member to be inserted therein.

[0016] According to another aspect of the present invention, a switch cabinet is also provided, which includes a cabinet body, a cabinet door movably installed to the cabinet body, and a grounding switch. The switch cabinet also includes the aforementioned cabinet door grounding interlocking device.

[0017] Other features and advantages of this invention will partly be apparent to those skilled in the art upon reading this application, and partly will be described below in conjunction with the accompanying drawings in the detailed description. Attached Figure Description

[0018] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings, wherein:

[0019] Figure 1a This is a perspective view of a cabinet door grounding interlocking device for a switchgear according to the present invention, wherein the cabinet body has been removed to show details, the locking component is in the locked state, the cabinet door is in the closed position, the grounding switch is in the grounded position, and the position switch is in the on state.

[0020] Figure 1b yes Figure 1a The first side view of the cabinet door grounding interlock device shown is illustrated in part of the cabinet door.

[0021] Figure 1c yes Figure 1a The second side view of the cabinet door grounding interlock device shown is illustrated in part of the cabinet door.

[0022] Figure 2a This is a perspective view of a cabinet door grounding interlocking device for a switchgear according to the present invention, wherein the cabinet body is removed to show details, the locking component is in the unlocked state, the cabinet door is in the open position, the grounding switch is in the grounded position, and the position switch is in the off state.

[0023] Figure 2b yes Figure 2a The first side view of the cabinet door grounding interlock device shown is illustrated in part of the cabinet door.

[0024] Figure 2c yes Figure 2a The second side view of the cabinet door grounding interlock device shown is illustrated in part of the cabinet door.

[0025] Explanation of reference numerals in the attached drawings: 100-Switch cabinet; 10-Cabinet door grounding interlock device; 11-Locking component; 111-First locking component; 112-Second locking component; 112a-Retaining groove; 113-Mounting part; 114-Retaining component; 12-Transmission component; 121-First transmission component; 122-Second transmission component; 122a-Transmission rod; 122b-Switching plate; 13-Limiting component; 131-Avoidance opening; 14-Position switch; 141-Support frame; 141a-Guide hole; 142-Switch body; 151-Rear crank arm; 16-Door limiting component; 17-Transmission reset component; 20-Cabinet door; 30-Three-position isolating grounding switch. Detailed Implementation

[0026] The schematic scheme of the cabinet door grounding interlock device for switchgear disclosed in this utility model is now described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of this utility model, the drawings are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of this utility model. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0027] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0028] The terms “first,” “first,” “second,” “second,” and similar terms used in this utility model do not indicate any order, quantity, or importance, but are used to distinguish one component from other components.

[0029] The terms "joining", "connection" and similar terms used in this utility model include both indirect connection of two components with the aid of an intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.) and direct connection of two components without the aid of any intermediate layer (e.g., adhesive, welding agent, etc.) or intermediate parts (e.g., connector, transition piece, etc.).

[0030] Figures 1a to 2c The present invention provides a switch cabinet 100, which may include a cabinet body, a cabinet door 20 movably mounted to the cabinet body, a grounding switch, and a cabinet door grounding interlocking device 10. The cabinet body may have multiple compartments, and the cabinet door 20 may cooperate with one of the compartments to form a busbar equipment cabinet. The grounding switch, especially a three-position isolating grounding switch 30, may be arranged in another compartment, especially in the compartments located on the upper and rear sides of the busbar equipment cabinet. The cabinet door grounding interlocking device 10 may interlock between the cabinet door 20 and the grounding switch to meet the electrical safety, insulation performance, and ease of operation requirements of the switch cabinet 100.

[0031] Understandably, the "upper" side and "lower" side mentioned in this article are respectively attached... Figure 1a The top and bottom sides of the page, the "front" side and the "back" side are respectively attached. Figure 1c The right and left sides of the page are respectively attached. Figure 1b The left and right sides of the page.

[0032] like Figures 1a to 1c As shown, the cabinet door grounding interlock device 10 may include a locking component 11, a transmission component 12, a limiting component 13, and a position switch 14.

[0033] Specifically, the locking component 11 may include a first locking member 111 and a second locking member 112. The first locking member 111 may be fixedly installed to the inside of the cabinet door 20, for example, designed as a plate-like structure with a through hole therein. The second locking member 112 may be movably installed, for example, slidably installed to the inside of the cabinet and arranged adjacent to the first locking member 111, for example, designed as a slender structure extending in the vertical direction. When the cabinet door 20 is in the closed position as shown in the figure, the second locking member 112 may pass through the through hole on the first locking member 111 in the vertical direction, thereby restricting the cabinet door 20 from moving forward relative to the cabinet body. The cabinet door 20 is thus locked to the closed position by means of the interlocking first locking member 111 and the second locking member 112.

[0034] The transmission component 12 may include a first transmission member 121 and a second transmission member 122. The first transmission member 121 extends in the front-to-back direction, and the second transmission member 122 extends in the vertical direction. The two ends of the first transmission member 121 are movably connected to the second locking member 112 and the second transmission member 122, respectively, so that the second transmission member 122 moves synchronously with the second locking member 112 via the first locking member 111. By arranging the first transmission member 121 and the second transmission member 122 extending in different directions, not only can the space occupied by the cabinet door grounding interlocking device 10 in the cabinet be greatly reduced, but it can also be applied to the situation where the grounding switch and the busbar equipment room are misaligned, thereby expanding its applicability.

[0035] For example, the front and rear ends of the first transmission member 121 can be connected to the lower ends of the second locking member 112 and the second transmission member 122 via crank arms, respectively. The up and down movement of the second locking member 112 can be converted into the rotation of the first transmission member 121 via the front crank arm. The rotation of the first transmission member 121 is then converted into the up and down movement of the second transmission member 122 via the rear crank arm 151. Thus, the second transmission member 122 can move up and down synchronously with the second locking member 112 via the first transmission member 121.

[0036] The limiting member 13 can be fixedly installed on the upper side of the second transmission member 122 to the three-position isolating grounding switch 30, so as to follow the three-position isolating grounding switch 30 to switch to different positions, such as the isolation position, the closing position, and the grounding position. When the limiting member 13 moves with the three-position isolating grounding switch 30 to the non-grounding position, i.e., the isolation position or the closing position, the limiting member 13 prevents the second transmission member 122 from moving upward. Only when the limiting member 13 moves with the three-position isolating grounding switch 30 to the grounding position as shown in the figure, the limiting member 13 avoids the second transmission member 122 and allows the second transmission member 122 to move upward.

[0037] For example, the limiting member 13 may be designed as a disc structure fixedly sleeved to the operating drive shaft of the three-position disconnecting switch mechanism, and its outer periphery may be provided with a radially opening clearance opening 131. When the limiting member 13 moves to the non-grounded position, the outer periphery of the limiting member 13 abuts against the upper end of the second drive member 122, preventing the second drive member 122 from moving upward. When the limiting member 13 moves to the grounded position, the clearance opening 131 of the limiting member 13 rotates to be opposite to the second drive member 122, so as to allow the second drive member 122 to move upward into the clearance opening 131.

[0038] Position switch 14 can be fixedly installed inside the cabinet and electrically connected to the electric operating mechanism of the three-position isolating grounding switch 30. As shown in the figure, position switch 14 is in the conducting state, thereby allowing the electric operation of the three-position isolating grounding switch 30. Position switch 14 engages with the second transmission component 122, which not only makes reasonable use of the space inside the cabinet, but also allows the position switch 14 to switch between the conducting and disconnected states by the up and down movement of the second transmission component 122.

[0039] Therefore, when maintenance is required on the equipment inside the busbar equipment cabinet, the three-position isolating grounding switch 30 can be switched to the grounding position first. The limiting member 13 will move accordingly to the grounding position, and the clearance opening 131 of the limiting member 13 will move to be opposite to the second transmission member 122. At this time, the second locking member 112 can be unlocked by external force, that is, from the... Figures 1a to 1b The locked position shown is moved upwards as follows: Figures 2a to 2c The unlock position shown indicates that the first transmission component 121 is in the unlock position. Figure 1a The clockwise rotation shown in the diagram causes the second transmission member 122 to move upwards into the clearance opening 131 of the limiting member 13. Simultaneously, the upward movement of the second transmission member 122 disengages it from the position switch 14, thus switching the position switch 14 to the off state. Figures 2a to 2c As shown, this allows operators to open the cabinet door 20 to inspect and maintain the equipment inside the cabinet while the three-position isolation grounding switch 30 is in the grounded state, and avoids accidental electric operation of the three-position isolation grounding switch 30 during inspection and maintenance, thus greatly improving safety.

[0040] After maintenance is completed, the operator can close the cabinet door 20. The second locking member 112 can be locked by external force. Only after the cabinet door 20 is closed and in place can the second locking member 112 move downward to the through hole inserted into the first locking member 111 and engage with it. The second transmission member 122 moves downward along with the second locking member 112 via the first transmission member 121 to move out of the clearance opening 131 of the limiting member 13 and drive the position switch 14 to switch to the conducting state again. Thus, the cabinet door grounding interlocking device 10 provided by this utility model can ensure that the three-position isolation grounding switch 30 can be electrically operated again only after the cabinet door 20 is closed and locked, thereby enabling the equipment in the busbar equipment cabinet to be powered on and operated.

[0041] Optionally, such as Figures 1a to 1cAs shown, the cabinet door grounding interlock device 10 may further include a door restrictor 16. As shown, the door restrictor 16 can be fixedly installed to the second transmission member 122 and extends to the left of the second transmission member 122 away from it until it is generally arranged opposite to the manual operating mechanism of the three-position isolating grounding switch 30. When the second transmission member 122 moves upward, the door restrictor 16 moves upward with the second transmission member 122 and engages with the manual operating mechanism of the three-position isolating grounding switch 30, for example, engaging with the door of the manual operating mechanism. This restricts the manual operation of the manual operating mechanism by limiting the insertion of the manual operating handle. Figures 2a to 2c As shown. Therefore, with the help of the cabinet door grounding interlock device 10 provided by this utility model, operators can prevent the manual and electric operation of the three-position isolation grounding switch 30 from leaving the grounding position when inspecting and maintaining the equipment in the busbar equipment cabinet, which greatly protects the personal safety of the operators.

[0042] Optionally, such as Figures 1a to 1c As shown, the position switch 14 may include a support frame 141 and a switch body 142. The support frame 141 may be fixedly mounted to a cabinet, and the switch body 142 is fixed relative to the cabinet by being mounted to the generally upper end of the support frame 141. The generally lower part of the support frame 141 may be provided with a guide hole 141a that allows the second transmission member 122 to pass through, so as to ensure the stability of the second transmission member 122 when it moves upward within the guide hole 141a.

[0043] Furthermore, such as Figures 1a to 1c As shown, the second transmission member 122 may include a transmission rod 122a extending vertically and passing through a guide hole 141a in the support frame 141, and a switching plate 122b extending to the right of the transmission rod 122a away from it. The switching plate 122b engages with the upper end of the switch body 142, forcing the switch body 142 to remain in the OFF state. When the transmission rod 122a moves upward via the first transmission member 121 following the second locking member 112, the switching plate 122b disengages from the upper end of the switch body 142, allowing the switch body 142 to be switched to the OFF state.

[0044] Optionally, such as Figures 1a to 1c As shown, the cabinet door grounding interlock device 10 may further include a transmission reset member 17. The transmission reset member 17 may be designed as a torsion spring with both ends connected to the cabinet body and the first transmission member 121 respectively, so that the second transmission member 122, under the push of the second locking member 112, must overcome the force of the transmission reset member 17 and rotate clockwise to... Figures 2a to 2c As shown, the first transmission component 121 can return to its original position under the reset force of the transmission reset component 17 after maintenance work is completed. Figures 1a to 1c The position can also drive the second transmission component 122 and the second locking component 112 back to their original positions.

[0045] Optionally, such as Figures 1a to 1c As shown, the locking component 11 may further include a mounting portion 113 and a retaining member 114. The mounting portion 113 can be fixedly mounted to the cabinet body, the second locking member 112 can be slidably mounted to the mounting portion 113, and the retaining member 114 can be elastically mounted to the mounting portion 113. The outer periphery of the second locking member 112 may be provided with a retaining groove 112a extending axially. As shown, the area on the outer periphery of the second locking member 112 located above the retaining groove 112a abuts against the retaining member 114 and holds the retaining member 114 in an offset state.

[0046] When the second locking element 112 performs the unlocking action and moves upwards... Figures 2a to 2c When the position is shown, the retaining groove 112a of the second locking member 112 moves upward and aligns with the retainer 114. The second locking member 112 no longer biases against the retainer 114, and the retainer 114 can engage with the retaining groove 112a on the second locking member 112 under the action of elastic force, thereby keeping the second locking member 112 in the unlocked position. After the maintenance work is completed, the second locking member 112 performs a locking action and moves downward. The retaining groove 112a of the second locking member 112 disengages from the retainer 114, and the outer periphery of the second locking member 112 biases against the retainer 114 again.

[0047] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0048] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A cabinet door grounding interlock device (10) for a switchgear (100), the switchgear (100) comprising a cabinet body and a cabinet door (20) movably installed to the cabinet body and a grounding switch, characterized in that, The cabinet door grounding interlock device (10) includes: The locking component (11) includes a first locking member (111) installed to the inside of the cabinet door (20) and a second locking member (112) movably installed to the inside of the cabinet and engaged with the first locking member (111) to lock the cabinet door (20) to the closed position; The transmission component (12) includes a first transmission component (121) extending laterally to the second locking component (112) and a second transmission component (122) extending laterally to the first transmission component (121) and linked with the second locking component (112) via the first transmission component (121); A limiting member (13) is arranged near the end of the second transmission member (122) away from the first transmission member (121) to limit the movement of the second transmission member (122). The limiting member (13) is fixedly installed to the grounding switch and can move with the grounding switch. Position switch (14), which is fixedly installed in the cabinet and electrically connected to the electric operating mechanism of the grounding switch; The limiting member (13) is configured to avoid the second transmission member (122) when the grounding switch moves to the grounding position, so as to allow the second transmission member (122) to move via the first transmission member (121) in response to the unlocking action of the second locking member (112) and drive the position switch (14) to switch to the off state, thereby restricting the electric operation of the electric operating mechanism of the grounding switch.

2. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 1, characterized in that, The cabinet door grounding interlock device (10) further includes a door restrictor (16) arranged on the second transmission member (122) and extending in a direction transverse to the extension direction of the second transmission member (122). The door restrictor (16) can be driven by the second transmission member (122) to engage with the manual operation mechanism of the grounding switch to restrict the manual operation of the manual operation mechanism of the grounding switch.

3. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 1 or 2, characterized in that, The limiting member (13) is designed as a disc structure that is fixedly sleeved on the operating transmission shaft of the grounding switch. The outer periphery of the disc is provided with an avoidance opening (131) that allows the second transmission member (122) to move in.

4. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 3, characterized in that, The second locking member (112) and the second transmission member (122) extend in the same direction, and both ends of the first transmission member (121) are connected to the second locking member (112) and the second transmission member (122) via crank arms.

5. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 3, characterized in that, The position switch (14) includes a support frame (141) mounted to the cabinet and a switch body (142) mounted to the support frame (141). The support frame (141) is provided with a guide hole (141a) that allows the second transmission member (122) to pass through.

6. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 5, characterized in that, The second transmission member (122) includes a transmission rod (122a) extending in a direction transverse to the extension direction of the first transmission member (121) and a switching plate (122b) disposed on the transmission rod (122a) and extending transversely to the transmission rod (122a), the switching plate (122b) engaging the switch body (142) to put the switch body (142) in a conducting state.

7. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 4, characterized in that, The first transmission member (121) is installed to the cabinet via the transmission reset member (17) so that the first transmission member (121) can overcome the movement of the transmission reset member (17) in response to the unlocking action of the second transmission member (122).

8. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 1, characterized in that, The locking component (11) further includes a retainer (114) elastically mounted to the cabinet, the retainer (114) being biased by the second locking component (112) and engaging with the retaining groove (112a) on the second locking component (112) under the action of a reset elastic force after the second locking component (112) moves to the unlock position.

9. The cabinet door grounding interlock device (10) for a switchgear (100) according to claim 1, characterized in that, The second locking member (112) is designed as an elongated structure, and the first locking member (111) is designed as a plate-like structure that allows the second locking member (112) to be inserted therein.

10. A switch cabinet (100), comprising a cabinet body, a cabinet door (20) movably mounted to the cabinet body, and a grounding switch, characterized in that, The switch cabinet (100) further includes a cabinet door grounding interlock device (10) according to any one of claims 1 to 9.

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