Interlocking device and switch equipment

Abstract

The present invention discloses an interlocking device and a switchgear. The interlocking device cooperates with a part to be locked, and includes: a base frame, a driving member, a first connecting rod, and a locking member. The driving member is driven by an external force; the first connecting rod is linked to the driving member, and the first connecting rod is pivotally connected to the base frame; the locking member is connected to the first connecting rod; the driving member has a closing state in which the locking member is driven to move in a direction close to the part to be locked to lock the part to be locked, and an opening state in which the locking member is driven to move in a direction away from the part to be locked to separate from the part to be locked. Under the action of an external force, the driving member drives the first connecting rod to move, and the first connecting rod drives the locking member connected thereto to move, and then the locking member and the part to be locked are locked or separated with each other, thereby realizing the control of the action of the locking member by the opening and closing of the driving member, reducing the influence of the external environment on the locking member, improving the reliability of the interlocking action of the switchgear, and thus meeting the requirements for the five-protection function of the switchgear.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and distribution, and in particular to an interlocking device and a switchgear. Background Art

[0002] To prevent accidents caused by unintentional operator errors, switchgear must have five protections: preventing accidental opening and closing of circuit breakers; preventing opening and closing of disconnectors under load; preventing the connection of live ground wires; preventing power transmission with the ground wire connected; and preventing accidental entry into live compartments.

[0003] As one of the important five-protection interlocks of the central cabinet, when the grounding knife is closed, the circuit breaker trolley is required not to be moved from the test position to the working position. If the trolley reaches the working position, it will cause a short circuit in the main circuit, further causing a safety accident.

[0004] In the existing central cabinet, in order to ensure the realization of the five-protection function, when power is supplied, the grounding switch is first opened, and then the locking plate slides upward in the vertical direction to drive the connecting plate to lock and unlock the trolley guide rail, and the trolley can be swung to the working position; when power is off, the trolley is swung out to the test position, and the locking plate is pressed down to drive the connecting plate to lock and lock the trolley guide rail. At this time, the trolley cannot be swung in, thereby preventing the trolley from being swung from the test position to the working position when the grounding switch is closed, thereby realizing the five-protection function of the switchgear.

[0005] However, during operation, the locking plate is susceptible to external influences, preventing reliable interlocking of the switchgear. This can lead to safety issues. For example, if the locking plate becomes stuck during the downward movement, preventing the trolley rail from locking in place, the trolley's lead screw from being stuck and allowed to continue to swing into the operating position. Closing the grounding switch at this point could cause a short circuit in the main circuit, potentially leading to a safety incident. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is that in the prior art, during the operation of the switchgear, since multiple components of the locking plate are linked and greatly affected by the outside world, it is impossible to achieve reliable interlocking action of the switchgear.

[0007] To this end, the present invention provides an interlocking device, which cooperates with the part to be locked, comprising:

[0008] scaffolding;

[0009] a driving member, wherein the driving member is driven by an external force;

[0010] a first connecting rod, linked to the driving member, and pivotally connected to the base frame;

[0011] a locking member connected to the first connecting rod;

[0012] The driving member has a closing state in which the driving member drives the locking member to move toward the member to be locked to lock the member to be locked, and an opening state in which the driving member drives the locking member to move toward and away from the member to be locked to separate from the member to be locked.

[0013] Optionally, the interlocking device further comprises a second connecting rod, both ends of which are pivotally connected to the driving member and the first connecting rod respectively;

[0014] The first connecting rod and the second connecting rod form a linkage assembly.

[0015] Optionally, in the above-mentioned interlocking device, the first connecting rod has a first pivot end pivotally connected to the base frame;

[0016] The first connecting rod further includes a second pivot end pivotally connected to the second connecting rod and a third pivot end pivotally connected to the locking member;

[0017] The second pivot end and the third pivot end are respectively disposed on both sides of the first pivot end.

[0018] Optionally, in the above-mentioned interlocking device, the second connecting rod has a fourth pivotal end pivotally connected to the driving member and a fifth pivotal end pivotally connected to the second connecting rod;

[0019] The fifth pivot end is connected to the second pivot end via a pivot shaft.

[0020] Optionally, the above-mentioned interlocking device also includes a driving block, which is rotatably arranged relative to the base frame, and the rotating axis of the driving block is eccentrically arranged with respect to the geometric center of the driving block; the driving surface of the driving block abuts against one end of the driving member to drive the driving member to move; the driving block and the driving member constitute a driving assembly.

[0021] Optionally, in the above-mentioned interlocking device, the driving assembly further comprises a driving rod fixedly arranged with the driving block, the driving block is sleeved on the driving rod, and the driving rod is rotatably arranged relative to the base frame.

[0022] Optionally, in the above-mentioned interlocking device, the driving surface includes:

[0023] a first driving surface, wherein in the closed state, the first driving surface abuts against the driving member; and a second driving surface, wherein in the open state, the second driving surface abuts against the driving member;

[0024] The first driving surface and the second driving surface are unequally spaced apart from a perpendicular line of the rotation axis.

[0025] Optionally, the interlocking device further includes a reset component for driving the driving member to reset from the closed position in the closed state to the open position in the open state, the reset component including:

[0026] A positioning plate is fixedly mounted on the base frame and is slidably sleeved on the driving member;

[0027] A biasing member is sleeved on the driving member, and one end of the biasing member abuts against the positioning plate; the other end is fixed to the driving member; when the locking member is in the closing position, the biasing member has a biasing force that drives the driving member to move toward the opening position.

[0028] Optionally, in the above-mentioned interlocking device, the reset assembly further includes a biasing limiter;

[0029] The bias limiting member is fixedly mounted on the driving member, and the bias limiting member has a limiting surface abutting against the biasing member to limit the position of the bias limiting member.

[0030] A switch device comprises: a screw rod and a lock plate, and an interlocking device, wherein the parts to be locked are the screw rod and the lock plate; wherein the driving member has a closing state in which the locking member is driven toward the lock plate to drive the lock plate to lock with the screw rod, and an opening state in which the locking member is driven toward the lock plate to drive the lock plate to separate from the screw rod.

[0031] Optionally, in the above-mentioned switch device, a linkage assembly is further provided between the lock plate and the locking member, and the linkage assembly includes:

[0032] A linkage member is rotatably arranged relative to the base frame, and the linkage member drives the lock plate to move in a direction close to or away from the screw rod through a connecting structure;

[0033] The dial plate rotates synchronously with the linkage member and has an abutting end abutting against the locking member; the abutting end is driven by the locking member to drive the linkage member to drive the locking plate to lock or separate with the screw rod.

[0034] Optionally, the connection structure of the switch device mentioned above includes: a connection hole provided in the linkage member, and a connection rod, wherein the connection rod is fixed to the lock plate and is slidably provided in the connection hole.

[0035] The technical solution provided by the present invention has the following advantages:

[0036] The interlocking device provided by the present invention is adapted for use with a member to be locked and comprises: a base frame, a driving member, a first connecting rod, and a locking member. The driving member is driven by an external force; the first connecting rod is linked to the driving member and pivotally connected to the base frame; the locking member is connected to the first connecting rod; the driving member has a closed state, in which it drives the locking member toward the member to be locked to lock the member to be locked, and an open state, in which it drives the locking member away from the member to be locked to separate from the member to be locked.

[0037] The interlocking device of this structure directly drives the driving member to move the first connecting rod under the action of external force, so that the first connecting rod drives the locking member connected to it to move, and then the locking member and the member to be locked are locked or separated with each other, so that the movement of the locking member can be directly controlled during the opening and closing action of the driving member, thereby ensuring that the opening and closing of the grounding switch corresponds to the locking of the member to be locked, reducing the influence of the external environment on the locking member, improving the reliability of the interlocking action of the switch equipment, and meeting the requirements of the five protection functions of the switch equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 Schematic diagram of the structure of the switch device provided in Example 1 in the open state

[0040] Figure 2 Schematic diagram of the structure of the switch device provided in Example 1 in the closed state

[0041] Figure 3 Schematic diagram of the structure of the interlocking device provided in Example 1

[0042] Figure 4 Schematic diagram of the structural relationship between the screw rod, lock plate, dial plate, linkage member and connecting rod in the switch device provided in Example 1

[0043] Description of reference numerals:

[0044] 11-screw rod; 12-locking plate; 121-locking hole; 13-shift plate; 14-linkage member; 141-connecting hole; 15-connecting rod;

[0045] 21-base frame; 22-driving assembly; 221-driving member; 222-driving block; 2221-first driving surface; 2222-second driving surface; 223-driving rod; 231-first connecting rod; 2311-first pivot end; 2312-second pivot end; 2313-third pivot end; 232-second connecting rod; 2321-fourth pivot end; 2322-fifth pivot end; 24-locking member; 25-reset assembly; 251-positioning plate; 252-biasing member; 253-biasing limit member. DETAILED DESCRIPTION

[0046] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] Example 1

[0051] This embodiment provides a switch device, such as Figures 1 to 4 As shown, it includes: a screw rod 11, a dial plate 13, a linkage member 14, a lock plate 12 and an interlocking device; wherein the interlocking device includes: a base frame 21, a drive assembly 22, a linkage assembly and a locking member 24.

[0052] Specifically, the driving assembly 22 is driven by an external force; the linkage assembly is pivotally connected to one end of the driving assembly 22, and the linkage assembly is pivotally connected to the base frame 21; the linkage assembly on one side of the locking member 24 is pivotally connected, and the other end is linked to the dial plate 13; the dial plate 13 and the linkage member 14 are coaxially arranged, and the two are synchronously pivoted relative to the base frame 21, and the linkage member 14 drives the lock plate 12 to move in the direction close to or away from the screw rod 11 through the connecting structure; the driving assembly 22 has a closing state in which the locking member 24 is driven to move toward the direction close to the lock plate 12 to drive the lock plate 12 to lock with the screw rod 11, at this time, the trolley remains stationary; in addition, the driving assembly 22 also has an opening state in which the locking member 24 is driven to move toward the direction away from the lock plate 12 to drive the lock plate 12 to separate from the screw rod 11, at this time the trolley can move back and forth between the working position and the test position.

[0053] Specifically, in this embodiment, a connecting hole is provided on the base frame 21. A locking member 24 is disposed within the connecting hole and slides relative to the connecting hole. The end of the locking member 24, distal from the linkage assembly, abuts the shift plate 13. The connecting hole provides a guide for the connection between the locking member 24 and the shift plate 13. In this embodiment, the connecting hole is a square through-hole. Furthermore, the shift plate 13 has an abutting end that abuts the locking member 24. This abutting end is driven by the locking member 24 to drive the linkage assembly 14 to engage or disengage the locking plate 12 with the screw rod 11.

[0054] like Figure 4 As shown, the aforementioned connection structure includes: a connection hole 141 provided in the linkage member 14, and a connecting rod 15. The connecting rod 15 is fixed to the lock plate 12 and slidably disposed within the connection hole 141. The connection hole 141 is a long, waist-shaped through hole, with one end of the connecting rod 15 inserted into the long, waist-shaped hole. The sidewalls of the long, waist-shaped hole abut against the sidewalls of the connecting rod 15, thereby driving the linkage member 14 to move the connecting rod 15, and thus the lock plate 12.

[0055] like Figure 4 As shown, the cross-section of the dial plate 13 is V-shaped, one side of the V-shape is used to abut against the locking member 24, and the other side of the V-shape is used to be connected and fixed with the rotating shaft of the dial plate 13. The linkage member 14 is coaxially arranged with the dial plate 13. Specifically, the linkage member 14 is sleeved on the rotating shaft, and the dial plate 13 is fixed to the rotating shaft by screws.

[0056] like Figure 4 As shown, a locking hole 121 is provided on the lock plate 12 , and the locking hole 121 and the screw rod 11 are locked with each other, thereby ensuring that the screw rod 11 cannot rotate when locked. In this embodiment, the locking hole 121 is a U-shaped hole.

[0057] In this embodiment, the linkage assembly includes a first link 231 and a second link 232. Specifically, the two ends of the second link 232 are pivotally connected to the driving assembly 22 and the first link 231 respectively; the first link 231 is connected between the second link 232 and the locking member 24, and the first link 231 is pivotally connected to the base frame 21.

[0058] For example, in this embodiment, the first connecting rod 231 has a first pivot end 2311 pivotally connected to the base 21. The first connecting rod 231 also includes a second pivot end 2312 pivotally connected to the second connecting rod 232 and a third pivot end 2313 pivotally connected to the locking member 24. The second pivot end 2312 and the third pivot end 2313 are located on either side of the first pivot end 2311. In this embodiment, the second connecting rod 232 has a fourth pivot end 2321 pivotally connected to the drive assembly 22 and a fifth pivot end 2322 pivotally connected to the second connecting rod 232. The fifth pivot end 2322 is connected to the second pivot end 2312 via a pivot shaft. Specifically, in this embodiment, any pivotal connection can be formed by the pivot shaft mating with two pivot holes.

[0059] like Figure 3 As shown, the drive assembly 22 includes a drive member 221, a drive block 222, and a drive rod 223. The drive block 222 is sleeved on the drive rod 223 and rotatably disposed relative to the base frame 21. The rotation axis of the drive block 222 is eccentrically disposed relative to the geometric center of the drive block 222. The drive block 222 abuts against one end of the drive member 221 to drive the movement of the drive member 221. The drive member 221 is pivotally connected to the second connecting rod 232 to transmit the movement of the drive assembly 22. In this embodiment, the drive rod 223 serves as the grounding shaft of the switchgear.

[0060] like Figure 3 As shown, the driving surface in this embodiment includes: a first driving surface 2221 and a second driving surface 2222. Specifically, in the closed state, the first driving surface 2221 and the driving member 221 abut against each other; in the open state, the second driving surface 2222 abuts against the driving member 221; the first driving surface 2221 and the second driving surface 2222 are unequally spaced from the perpendicular to the rotating shaft. For example, the distance between the first driving surface 2221 is greater than the distance between the second driving surface 2222 and the rotating shaft. The first driving surface 2221 and the second driving surface 2222 are both arc surfaces. Of course, in other optional embodiments, a plane or other curved surface structure may also be used.

[0061] like Figure 2 and Figure 3As shown, the interlocking device further includes a reset assembly 25, which is used to drive the driving member 221 to reset from the closed position in the closed state to the open position in the open state. Specifically, the reset assembly 25 includes a positioning plate 251, a biasing member 252, and a biasing limiter 253. The positioning plate 251 is fixedly mounted on the base frame 21 and slidably sleeved on the driving member 221; the biasing member 252 is sleeved on the driving member 221, and one end of the biasing member 252 abuts against the positioning plate 251, and the other end of the biasing member 252 is fixedly mounted on the driving member 221; when the locking member 24 is in the closed position, the biasing member 252 has a biasing force that drives the driving member 221 to move toward the open position. The biasing limiter 253 is fixedly mounted on the driver 221. The biasing limiter 253 has a limiting surface that abuts against the biasing member 252 to limit the position of the biasing limiter 253. In this embodiment, the biasing member 252 is a spring, and the biasing limiter 253 is a combination of a pin and a flat washer. The pin is inserted through the radial slot of the driver 221. The flat washer is relatively fixed to the pin and moves along the driving direction with the driver 221. In the reset assembly 25, the relative position of the positioning plate 251 and the driver 221 changes, so that the biasing member 252 generates a biasing force. The generation of the biasing force further provides the basis for the force for resetting from the closed position in the closed state to the open position in the open state, further improving the stability of the opening and closing movements.

[0062] In the switch device provided in this embodiment, the driving member 221 drives the first connecting rod 231 to move under the action of external force, so that the first connecting rod 231 drives the locking member 24 connected thereto to move, and then the locking member 24 and the member to be locked are locked or separated with each other, thereby realizing the control of the movement of the locking member 24 by the opening and closing of the driving member 221, reducing the influence of the external environment on the locking member 24, improving the reliability of the interlocking action of the switch device, and thus meeting the requirements of the five protection functions of the switch device.

[0063] Example 2

[0064] This embodiment provides a switch device, which differs from the switch device provided in Example 1 in that:

[0065] The second connecting rod 232 may not be provided, and the first connecting rod 231 may be directly connected to the driving member 221 .

[0066] Of course, in other optional embodiments, a plurality of second connecting rods 232 may be provided between the first connecting rod 231 and the driving member 221 to adapt to actual installation length requirements between the first connecting rod 231 and the driving member 221 .

[0067] Example 3

[0068] This embodiment provides a switch device, which differs from the switch device provided in Embodiment 1 or Embodiment 2 in that:

[0069] The reset assembly 25 may also not be provided, and the position of the first connecting rod 231 may be directly changed only by the position of the driving member 221. Similarly, it can be ensured that when the gate is opened or closed, the locking member 24 is in different positions to achieve different locking or unlocking states with the member to be locked.

[0070] Example 4

[0071] This embodiment provides a switch device, which differs from the switch device provided in any one of Embodiments 1 to 3 in that:

[0072] In this embodiment, the driving assembly 22 only includes the driving member 221, that is, the external force can directly drive the first connecting rod 231 by operating the driving member 221, and then drive the locking member 24 to move, ensuring that operating the grounding knife to open and close the switch can directly drive the locking member 24 to lock or unlock with the locked member.

[0073] At this time, the biasing member 252 in the reset assembly 25 can be specifically a torsion spring, thereby ensuring that a biasing force is provided when the opening and closing positions are switched. Of course, the reset assembly 25 can also be omitted according to the structure in Example 3.

[0074] For example, the driving member 221 is specifically the driving rod 223 in Example 1. The cross-sectional shape of the driving rod 223 can be set to a non-center symmetrical structure, so as to ensure that the position where the driving rod 223 is connected to the first connecting rod 231 will change accordingly when the driving rod 223 rotates, thereby realizing the grounding opening and closing of the switch while also realizing the opening and closing of the locked part on the trolley, specifically the screw rod 11. Obviously, the above embodiments are merely examples for clear explanation and are not limitations on the implementation methods. For ordinary technicians in the field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the invention.

Claims

1. A switch device comprising a screw rod (11) and a locking plate (12), characterized in that: include: Base frame (21); A driving member (221), wherein the driving member (221) is driven by an external force; A first connecting rod (231) is linked to the driving member (221), and the first connecting rod (231) is pivotally connected to the base frame (21); A locking member (24) connected to the first connecting rod (231); The driving member (221) has a closing state in which the locking member (24) is driven to move toward the locking plate (12) to drive the locking plate (12) to lock with the screw rod (11), and an opening state in which the locking member (24) is driven to move toward the locking plate (12) to drive the locking plate (12) to separate from the screw rod (11); There is also provided between the locking plate (12) and the locking member (24): A linkage member (14) is rotatably arranged relative to the base frame (21), and the linkage member (14) drives the locking plate (12) to move in a direction close to or away from the screw rod (11) through a connecting structure; A shift plate (13) rotates synchronously with the linkage member (14) and has an abutting end abutting against the locking member (24); the abutting end is driven by the locking member (24) to drive the linkage member (14) to drive the locking plate (12) to lock or separate with the screw rod (11); It also includes a second connecting rod (232), with two ends of the second connecting rod (232) pivotally connected to the driving member (221) and the first connecting rod (231) respectively; The first connecting rod (231) and the second connecting rod (232) constitute a linkage assembly; It also includes a reset component (25) for driving the driving member (221) to reset from the closed position in the closed state to the open position in the open state, and the reset component (25) includes: A positioning plate (251) is fixedly mounted on the base frame (21), and the positioning plate (251) is slidably mounted on the driving member (221); A biasing member (252) is sleeved on the driving member (221), and one end of the biasing member (252) abuts against the positioning plate (251); one end is fixedly arranged with the driving member (221); when the locking member (24) is in the closing position, the biasing member (252) has a biasing force that drives the driving member (221) to move toward the opening position; The biasing limiting member (253) is fixedly mounted on the driving member (221), and the biasing limiting member (253) has a limiting surface that abuts against the biasing member (252) to limit the position of the biasing limiting member (253).

2. The switchgear according to claim 1, characterized in that The connection structure comprises: a connection hole (141) provided on the linkage member (14), and a connection rod (15), wherein the connection rod (15) is fixedly provided with the lock plate (12), and the connection rod (15) is slidably provided in the connection hole (141).

3. The switchgear according to claim 2, characterized in that The first connecting rod (231) has a first pivot end (2311) pivotally connected to the base frame (21); The first connecting rod (231) further includes a second pivot end (2312) pivotally connected to the second connecting rod (232) and a third pivot end (2313) pivotally connected to the locking member (24); The second pivot end (2312) and the third pivot end (2313) are respectively arranged on both sides of the first pivot end (2311).

4. The switchgear according to claim 3, characterized in that The second connecting rod (232) has a fourth pivot end (2321) pivotally connected to the driving member (221) and a fifth pivot end (2322) pivotally connected to the first connecting rod (231); The fifth pivot end (2322) is connected to the second pivot end (2312) via a pivot axis.

5. The switchgear according to claim 1, characterized in that It also includes a driving block (222) that is rotatably arranged relative to the base frame (21), and the rotation axis of the driving block (222) is eccentrically arranged with respect to the geometric center of the driving block (222); the driving surface of the driving block (222) and one end of the driving member (221) abut against each other to drive the driving member (221) to move; the driving block (222) and the driving member (221) constitute a driving assembly (22); Wherein, the driving surface includes: a first driving surface (2221), in the closed state, the first driving surface (2221) abuts against the driving member (221); a second driving surface (2222), corresponding to the open state, the second driving surface (2222) abuts against the driving member (221); The first driving surface (2221) and the second driving surface (2222) are unequally spaced apart from a perpendicular line to the rotation axis.

6. The switchgear according to claim 5, characterized in that The driving assembly (22) further comprises a driving rod (223) fixedly arranged with the driving block (222), the driving block (222) being sleeved on the driving rod (223), and the driving rod (223) being rotatably arranged relative to the base frame (21).

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