Isolating switch intrinsic safety locking device

Abstract

The application discloses an isolating switch intrinsic safety locking device, which comprises a lock body, a limiting hole for penetrating the operating rod base, and a limiting fit with the operating rod base in the circumferential direction of the operating rod base; a fixed top screw, and an operating rod base provided with a top screw hole, the fixed top screw is adapted to be penetrated in the lock body and the top screw hole to lock the lock body and the isolating switch. The isolating switch intrinsic safety locking device can lock the isolating switch, limit the rotation and closing operation of the isolating switch, effectively prevent the energy medium locking failure caused by unsafe behavior of personnel or other reasons, and reduce the safety hazards during the maintenance of personnel.

Description

Technical Field

[0001] This application relates to the field of disconnector switch technology, and in particular to an intrinsically safe locking device for disconnectors. Background Technology

[0002] Currently, there are two common models of low-voltage distribution cabinets with disconnecting switches. One type has the disconnecting switch and its downstream circuit breaker separated, with an independent disconnecting switch compartment and separate doors for the disconnecting switch and circuit breaker, with the operating handle located outside the doors. The other type has the disconnecting switch and its downstream circuit breaker integrated together, without a separate disconnecting switch compartment. The disconnecting switch and circuit breaker are housed within a single low-voltage distribution cabinet door. In accordance with the principles for power-on and power-off operations of the disconnecting switch and circuit breaker, the operating handle for the disconnecting switch must be located inside the cabinet door.

[0003] According to existing intrinsically safe requirements for electrical equipment maintenance, effective isolation of energy media and implementation of intrinsically safe lockout and tagging systems are necessary. For distribution cabinets with operating handles located inside the cabinet, existing intrinsically safe locks cannot restrict the rotation of the handles, making intrinsically safe lockout and tagging impossible and failing to effectively isolate the electrical energy media, thus posing safety hazards during personnel maintenance. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes an intrinsically safe locking device for disconnecting switches, capable of locking the disconnecting switches to effectively prevent energy medium locking failure caused by unsafe human actions or other reasons, thereby reducing safety hazards during maintenance.

[0005] According to an embodiment of this application, the intrinsically safe locking device for a disconnecting switch includes an operating lever base. The intrinsically safe locking device for the disconnecting switch comprises: a lock body, the lock body having a limiting hole for passing through the operating lever base and having a limiting fit with the operating lever base in the circumferential direction; and a fixing screw, the operating lever base having a fixing screw hole, the fixing screw being adapted to pass through the lock body and the fixing screw hole to lock the lock body with the disconnecting switch.

[0006] The intrinsically safe locking device for disconnecting switches according to the embodiments of this application can lock the disconnecting switch to restrict its rotation and closing operations, thereby effectively preventing energy medium locking failure caused by unsafe human behavior or other reasons, and reducing safety hazards during maintenance.

[0007] According to some embodiments of the present application, in the intrinsically safe locking device for disconnecting switches, the fixing set screw is threadedly engaged with the set screw hole.

[0008] According to some embodiments of the present application, the intrinsically safe locking device for disconnecting switches includes a nut on the fixing screw.

[0009] According to some embodiments of the present application, the intrinsically safe locking device for the disconnecting switch has a mating groove on the outer peripheral wall of the set screw hole, and the nut is adapted to extend into the mating groove.

[0010] The intrinsically safe locking device for a disconnecting switch according to some embodiments of this application further includes: a stop block, wherein the disconnecting switch is provided with a slot, the stop block engages with the slot and is limited to the operating rod base in the circumferential direction.

[0011] According to some embodiments of the present application, the intrinsically safe locking device for disconnecting switches includes an operating lever base with a set screw for connecting to the operating lever handle, a stop block with a clearance groove, and the set screw retracted into the clearance groove.

[0012] The intrinsically safe locking device for disconnecting switches according to some embodiments of this application further includes: a drawer-type baffle, which is movably connected to the lock body, and the drawer-type baffle is used to block or open the fixing screw.

[0013] According to some embodiments of the present application, the drawer-type baffle of the isolation switch is slidably engaged with the lock body.

[0014] According to some embodiments of the present application, the intrinsically safe locking device for disconnecting switches has a first locking hole for installing a life lock.

[0015] According to some embodiments of the present application, the intrinsically safe locking device for the disconnecting switch has a drawer-type baffle with a second locking hole. When the drawer-type baffle blocks the fixing screw, the second locking hole is positioned opposite to the first locking hole.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the intrinsically safe locking device for disconnecting switches according to some embodiments of this application. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the intrinsically safe locking device for disconnecting switches according to some embodiments of this application. Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the intrinsically safe locking device for disconnecting switches according to some embodiments of this application. Figure 3 .

[0021] Figure label:

[0022] Intrinsic safety interlocking device 10 for disconnecting switches;

[0023] The lock body 101 includes a limiting hole 1, a stop block 2, a top screw hole 3, a mating groove 31, a fixing top screw 4, and a nut 41; a drawer-type baffle 5, a locking hole 6, a first locking hole 7, and a second locking hole 8. Detailed Implementation

[0024] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0025] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0026] Currently, there are two common models of low-voltage distribution cabinets with disconnecting switches. One type has the disconnecting switch and its downstream circuit breaker separated, with an independent disconnecting switch compartment and separate doors for the disconnecting switch and circuit breaker, with the operating handle located outside the doors. The other type has the disconnecting switch and its downstream circuit breaker integrated together, without a separate disconnecting switch compartment. The disconnecting switch and circuit breaker are housed within a single low-voltage distribution cabinet door. In accordance with the principles for power-on and power-off operations of the disconnecting switch and circuit breaker, the operating handle for the disconnecting switch must be located inside the cabinet door.

[0027] According to existing intrinsically safe requirements for electrical equipment maintenance, effective isolation of energy media and implementation of intrinsically safe lockout and tagging systems are necessary. For distribution cabinets with operating handles located inside the cabinet, existing intrinsically safe locks cannot restrict the rotation of the handles, making intrinsically safe lockout and tagging impossible and failing to effectively isolate the electrical energy media, thus posing safety hazards during personnel maintenance.

[0028] In related technologies, existing locks restrict the rotation of the handle by fixing the base of the disconnect switch to the door of the low-voltage distribution cabinet. However, for disconnect switches with the operating handle inside the low-voltage distribution cabinet, the base of the disconnect switch does not have a fixed point. After locking, pressing the button will cause the linkage mechanism to rotate the operating handle rod along with the base, which cannot restrict the opening and closing operation of the disconnect switch and does not achieve the purpose of energy isolation locking and tagging.

[0029] In response, this application proposes an intrinsically safe locking device 10 for disconnecting switches.

[0030] It is understandable that the disconnecting switch is equipped with an operating rod base, which is used to connect to the operating rod. The operating rod can drive the disconnecting switch to rotate in order to realize the opening and closing operation of the disconnecting switch.

[0031] like Figure 1 As shown, the intrinsically safe locking device 10 for the disconnecting switch according to an embodiment of this application includes: a lock body 101, as shown in the figure. Figure 2 As shown, the lock body 101 is provided with a limiting hole 1 for the operating rod base to pass through, and it is in a limiting fit with the operating rod base in the circumferential direction. In this way, after the lock body 101 is sleeved on the operating rod base, the lock body 101 can restrict the rotation of the operating rod base, thereby restricting the opening and closing operation of the disconnecting switch.

[0032] In some implementations, the limiting hole 1 is determined according to the length and width dimensions of the operating handle base of the disconnect switch, so that the lock body 101 can be placed on the operating handle base. For example, the limiting hole 1 can be a square hole, a triangular hole or a polygonal hole, which is not limited here.

[0033] In some implementations, the lock body 101 can be made of bakelite material, which facilitates the improvement of the insulation performance of the lock body 101.

[0034] Furthermore, such as Figure 2As shown, the operating lever base is provided with a set screw hole 3. The fixing set screw 4 is adapted to pass through the lock body 101 and the set screw hole 3 to lock the lock body 101 with the disconnecting switch. In this way, the lock body 101 can be further locked with the disconnecting switch, thereby restricting the rotation of the operating lever base, and thus restricting the opening and closing operation of the disconnecting switch. This securely locks the disconnecting switch, preventing it from being rotated or operated, effectively preventing the accidental release of energy medium, ensuring personal safety during subsequent maintenance work, and preventing electric shock accidents.

[0035] The intrinsically safe locking device 10 for disconnecting switches according to the embodiments of this application can lock the disconnecting switch to restrict its rotation and closing operation, thereby effectively preventing the energy medium locking failure caused by unsafe human behavior or other reasons, and thus reducing safety hazards during personnel maintenance.

[0036] According to some embodiments of this application, the intrinsically safe locking device 10 for the disconnecting switch has a fixed set screw 4 that is threadedly engaged with the set screw hole 3.

[0037] In this way, the fixing screw 4 can be rotated to enter or protrude from the screw hole 3, which helps to enhance the stability of the fit between the fixing screw 4 and the screw hole 3.

[0038] In some embodiments, such as Figure 2 As shown, the fixing screw 4 is equipped with a nut 41. This allows the operator to easily rotate the fixing screw 4 by holding the nut, thereby reducing the difficulty of adjusting the fixing screw 4.

[0039] In some embodiments, such as Figure 2 As shown, the outer peripheral wall of the set screw hole 3 is provided with a mating groove 31, and the nut 41 is adapted to extend into the mating groove 31.

[0040] Understandably, the outer peripheral wall of the set screw hole 3 can be sloped to form a mating groove 31. This allows the nut 41 to be embedded into the mating groove 31, thereby concealing the nut 41.

[0041] In some embodiments, such as Figure 1 and Figure 3 As shown, the intrinsically safe locking device 10 of the disconnecting switch also includes: a stop block 2, the disconnecting switch is provided with a slot, the stop block 2 engages with the slot and is limited to the operating rod base in the circumferential direction.

[0042] It is understandable that the stop block 2 can engage with the slot, simultaneously limiting its position on the operating rod base in the circumferential direction. That is, the stop block 2 engages with the slot, preventing it from rotating relative to the disconnector switch, and the stop block 2, connected to the operating rod base, also prevents the operating rod base from rotating relative to the disconnector switch. This further restricts the rotation of the operating rod base, thereby limiting the opening and closing operations of the disconnector switch, and ultimately locking the disconnector switch securely, preventing rotation, manipulation, and closing operations. This effectively prevents the accidental release of energy media, ensuring personal safety during subsequent maintenance work and preventing electric shock accidents.

[0043] In some embodiments, the operating lever base is provided with a set screw for connecting to the operating lever handle, and the stop block 2 is provided with a clearance groove, in which the set screw is housed. This prevents interference between the set screw and the stop block 2.

[0044] In some embodiments, the intrinsically safe locking device 10 for the disconnecting switch further includes a drawer-type baffle 5, which is movably connected to the lock body 101 and is used to cover or open the fixing screw 4. In this way, the fixing screw 4 can be hidden by covering it with the drawer-type baffle 5.

[0045] In some embodiments, the drawer-type baffle 5 is slidably engaged with the lock body 101. This reduces the difficulty of engaging the drawer-type baffle 5 with the lock body 101, and the slidable engagement enhances the stability of their engagement.

[0046] In some embodiments, such as Figure 2 and Figure 3 As shown, the lock body 101 is provided with a first locking hole 7 for installing a life lock. In this way, the life lock or other rigging can be passed through the first locking hole 7 to securely lock the disconnect switch, effectively preventing the accidental release of energy medium, ensuring personal safety during subsequent maintenance work, and preventing electric shock accidents.

[0047] In some embodiments, the drawer baffle 5 is provided with a second locking hole 8. When the drawer baffle 5 blocks the fixing screw 4, the second locking hole 8 is arranged opposite to the first locking hole 7.

[0048] It is understandable that, such as Figure 2 As shown, the second locking hole 8 is positioned opposite to the first locking hole 7 and the second locking hole 8 communicates with the first locking hole 7 to form a locking hole 6 (as shown). Figure 1 The locking hole 6 in the middle allows the life lock or other rigging to be passed through the first locking hole 7 and the second locking hole 8 in sequence to securely lock the disconnect switch, effectively preventing the accidental release of energy medium, ensuring personal safety during subsequent maintenance operations, and preventing electric shock accidents.

[0049] The following describes a specific embodiment of the use of the intrinsically safe locking device 10 for the disconnecting switch of this application:

[0050] Before maintenance, switch the disconnector to the open position. Align the limiting hole 1 in the middle of the lock body with the operating rod base of the disconnector and insert it. The stop block 2 will submerge the set screw of the operating rod base and fall completely into the slot of the disconnector. Secure the fixing set screw 4 in the mating hole of the operating rod base through the set screw hole 3 on the lock body 101, making the lock body 101 firmly fixed. Then push the drawer-type baffle 5 to completely cover the fixing set screw 4. At this time, the first locking hole 7 of the lock body 101 and the second locking hole 8 of the drawer-type baffle 5 are perfectly aligned. Pass the life lock or other rigging through the locking hole 6. Now the disconnector will be firmly locked, cannot be rotated or operated, effectively preventing the accidental release of energy medium, ensuring personal safety during subsequent maintenance work, and preventing electric shock accidents.

[0051] After the maintenance work is completed and confirmed by all three parties, the operator can remove the life lock and remove the fixing screw 4, after which the device can be taken off and the disconnect switch can be restored to normal use.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0053] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An intrinsically safe locking device (10) for a disconnecting switch, wherein the disconnecting switch is provided with an operating rod base, characterized in that, include: The lock body (101) is provided with a limiting hole (1) for passing through the operating rod base, and is limited to the operating rod base in the circumferential direction; A fixing screw (4) is provided on the base of the operating lever, and the fixing screw (4) is adapted to pass through the lock body (101) and the fixing screw hole (3) so that the lock body (101) is locked with the disconnecting switch.

2. The intrinsically safe locking device (10) for the disconnecting switch according to claim 1, characterized in that, The fixing screw (4) is threaded into the screw hole (3).

3. The intrinsically safe locking device (10) for the disconnecting switch according to claim 2, characterized in that, The fixing screw (4) is provided with a nut (41).

4. The intrinsically safe locking device (10) for the disconnecting switch according to claim 3, characterized in that, The outer peripheral wall of the top screw hole (3) is provided with a mating groove (31), and the nut (41) is adapted to extend into the mating groove (31).

5. The intrinsically safe locking device (10) for the disconnecting switch according to claim 1, characterized in that, Also includes: The stop block (2) is provided with a slot in the disconnect switch. The stop block (2) engages with the slot and is limited to the operating rod base in the circumferential direction.

6. The intrinsically safe locking device (10) for the disconnecting switch according to claim 5, characterized in that, The base of the operating lever is provided with a set screw for connecting to the handle of the operating lever, and the stop block (2) is provided with a clearance groove, in which the set screw is housed.

7. The intrinsically safe locking device (10) for a disconnecting switch according to any one of claims 1-6, characterized in that, Also includes: A drawer-type baffle (5) is movably connected to the lock body (101), and the drawer-type baffle (5) is used to cover or open the fixing screw (4).

8. The intrinsically safe locking device (10) for the disconnecting switch according to claim 7, characterized in that, The drawer-type baffle (5) is slidably engaged with the lock body (101).

9. The intrinsically safe locking device (10) for a disconnecting switch according to claim 7, characterized in that, The lock body (101) is provided with a first locking hole (7) for installing a life lock.

10. The intrinsically safe locking device (10) for a disconnecting switch according to claim 9, characterized in that, The drawer-type baffle (5) is provided with a second locking hole (8). When the drawer-type baffle (5) covers the fixing screw (4), the second locking hole (8) is arranged opposite to the first locking hole (7).

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