Disconnecting switch locking device and disconnecting switch protection method

Abstract

The invention belongs to the technical field of transformer substations, and discloses an isolating switch locking device and an isolating switch protection method. The disconnecting switch locking device comprises a fixed clamp body, a movable clamp body, a protective cover and a controller, wherein the fixed clamp body comprises a sliding part and a fixed part; the movable clamp body is slidably connected to the sliding part; a movable chuck and a clamping handle are arranged on the movable clamp body, and the cam part can extrude the movable chuck by operating the clamping handle; the movable clamp body is provided with a ratchet wheel, the clamping handle is provided with a pawl, and the pawl can be disengaged from the ratchet wheel by pressing the release switch; the protective cover is rotationally connected to the clamping handle and can cover the release switch; a locking pin is arranged on the protective cover in a penetrating manner and is provided with an electronic lock; the controller is in communication connection with the electronic lock. The disconnecting switch locking device can lock the disconnecting switch under the condition that existing equipment is not affected, the application range is wider, disconnecting switch opening caused by misoperation can be avoided, and the safety during substation maintenance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substations, and in particular to an isolating switch locking device and an isolating switch protection method. Background Art

[0002] An isolating switch is a switch device that is mainly used for "isolating power supply, switching operation, connecting and disconnecting small current circuits" and has no arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance that meets the specified requirements and an obvious disconnection mark between the contacts; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time; since the main feature of the isolating switch is that it has no arc extinguishing ability, the isolating switch can only open and close the circuit when there is no load current.

[0003] Work involving disconnectors in substations is subject to the risk of staff expanding the scope of work without authorization, violating safety regulations, and carrying out construction in a barbaric manner. The current safety measures mainly use the microcomputer five-protection system and maintenance isolation devices to prevent the equipment in the maintenance isolation surface from being energized, but the manual mechanism of the disconnector operating mechanism is not locked. In particular, when the knife switch needs to be tested or the work related to the operating mechanism is involved, the manual mechanism inside the disconnector operating mechanism is not locked. During the maintenance work, the staff may expand the scope of work without authorization and manually operate the knife switch for testing, thereby causing damage to the disconnector and abnormal operation of the substation, and even causing certain safety risks.

[0004] Therefore, there is an urgent need to provide a novel isolating switch locking device and isolating switch protection method to solve the above-mentioned technical problems in the prior art. Summary of the invention

[0005] One object of the present invention is to provide an isolating switch locking device, which can lock the isolating switch without affecting existing equipment, has a wider range of applications, and can also prevent the isolating switch from being opened due to misoperation, thereby improving the safety of substation maintenance.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The isolating switch locking device comprises a fixed clamp body, a movable clamp body, a protective cover and a controller, wherein the fixed clamp body comprises a sliding part and a fixed part fixedly arranged at either end of the sliding part along its own length direction, and the fixed part is perpendicular to the sliding part; the movable clamp body is slidably connected to the sliding part, and the manual operating mechanism of the isolating switch can be clamped and fixed between the movable clamp body and the fixed part; the movable clamp body is provided with a movable clamp head and a clamping handle, and the clamping handle is provided with a cam part, and operating the clamping handle can make the cam part squeeze or move away from the movable clamp head; wherein the movable clamp body The body is provided with a ratchet, the clamping handle is provided with a pawl, the pawl is meshed with the ratchet, the pawl is provided with a release switch, and pressing the release switch can disengage the pawl from the ratchet; the protective cover is rotatably connected to the clamping handle, and the protective cover can cover the release switch; when the protective cover covers the release switch, a locking pin is penetrated by the protective cover, the clamping handle is penetrated in a space enclosed by the protective cover and the locking pin, and the locking pin is provided with an electronic lock; the controller is communicatively connected to the electronic lock and is used to control the electronic lock.

[0008] Optionally, the protective cover includes a rotating part and two protective parts respectively arranged at two ends of the rotating part, and the protective part is provided with a pin hole, and the pin hole is used for passing the locking pin.

[0009] Optionally, a stopper is provided at one end of the locking pin, and a lock hole is opened at the other end, the diameter of the stopper is larger than the pin hole, and the lock hole is used to set the electronic lock.

[0010] Optionally, an elastic member is provided at one end of the pawl away from the ratchet, and the elastic member is fixed to the clamping handle. The elastic member can apply elastic force to the pawl to engage the pawl with the ratchet; pressing the release switch can overcome the elastic force of the elastic member to disengage the pawl from the ratchet.

[0011] Optionally, the clamping handle is provided with an avoidance groove, and the ratchet pawl and the elastic member are both accommodated in the avoidance groove.

[0012] Optionally, a clamping protrusion is provided in the avoidance groove, one end of the elastic member is inserted into the clamping protrusion, and the other end is fixed to the pawl.

[0013] Optionally, the sliding portion is provided with a sliding groove extending along its length direction, and the movable clamping body is provided with a sliding protrusion cooperating with the sliding groove.

[0014] Optionally, a stop block is provided at one end of the slide groove away from the fixing portion.

[0015] Optionally, the fixing portion and the sliding portion are integrally formed.

[0016] Another object of the present invention is to provide a disconnector protection method, which is used to operate the disconnector locking device as described in any of the above schemes, including the following steps: S1, locking the disconnector: placing the manual operating mechanism of the disconnector between the fixed part and the movable clamp, operating the clamping handle so that the cam part squeezes the movable clamp, and the movable clamp and the fixed part clamp the manual operating mechanism of the disconnector; S2, locking protection: the pawl is engaged with the ratchet, the protective cover is rotated so that the protective cover covers the release switch, the locking pin is inserted and the electronic lock is set on the locking pin; S3, networking protection: the controller is communicatively connected with the electronic lock, if the controller sends an unlocking signal, the electronic lock is opened; otherwise, the electronic lock is always in a locked state.

[0017] Beneficial effects:

[0018] The isolating switch locking device of the present invention uses the movable clamping body on the sliding part of the fixed clamping body and the fixed part to clamp and fix the manual operating mechanism of the isolating switch, so as to prevent the operator from accidentally opening the manual operating mechanism of the isolating switch; when locking, first operate and rotate the clamping handle so that the cam part on the clamping handle squeezes the movable clamping head so that the movable clamping head abuts against the manual operating mechanism, and at the same time, the pawl is engaged with the ratchet wheel to achieve the locking and fixing of the clamping handle. When unlocking is required, the release switch needs to be pressed to release the engagement of the pawl with the above-mentioned ratchet wheel, and the release switch is covered by a protective cover, and the protective cover is locked and fixed on the clamping handle through a locking pin and an electronic lock. Only when the controller sends an unlocking signal, the electronic lock can be opened, and then the isolating switch locking device can be removed from the manual operating mechanism of the isolating switch, so as to perform corresponding maintenance and maintenance operations on the isolating switch. The isolating switch locking device can lock the isolating switch without affecting the existing equipment, has a wider range of application, and can also avoid the opening of the isolating switch caused by misoperation, thereby improving the safety of the substation during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an axonometric diagram of an isolation switch locking device provided in a specific embodiment of the present invention;

[0020] Figure 2 It is a longitudinal cross-sectional view of an isolation switch locking device provided in a specific embodiment of the present invention.

[0021] In the figure:

[0022] 100, fixed clamp body; 110, sliding part; 120, fixed part;

[0023] 200, movable clamping body; 210, movable clamping head; 211, ratchet; 220, clamping handle; 221, avoidance groove; 222, clamping protrusion; 223, cam portion; 230, pawl; 231, release switch; 240, elastic member; 300, protective cover; 301, rotating portion; 302, protective portion; 310, locking pin; 320, electronic lock. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0028] like Figure 1 and Figure 2As shown, in this embodiment, the isolating switch locking device includes a fixed clamp body 100, a movable clamp body 200, a protective cover 300 and a controller, wherein the fixed clamp body 100 includes a sliding portion 110 and a fixed portion 120 fixedly arranged at either end of the sliding portion 110 along its own length direction, and the fixed portion 120 is perpendicular to the sliding portion 110; the movable clamp body 200 is slidably connected to the sliding portion 110, and the manual operating mechanism of the isolating switch can be clamped and fixed between the movable clamp body 200 and the fixed portion 120; the movable clamp body 200 is provided with a movable clamp head 210 and a clamping handle 220, and the clamping handle 220 is provided with a cam portion 223, and operating the clamping handle 220 can make the cam portion 223 squeeze or move away from the movable clamp head 210; wherein, the movable clamp body 20 0 is provided with a ratchet 211, the clamping handle 220 is provided with a pawl 230, the pawl 230 is meshed with the ratchet 211, the pawl 230 is provided with a release switch 231, and pressing the release switch 231 can make the pawl 230 disengage from the ratchet 211; the protective cover 300 is rotatably connected to the clamping handle 220, and the protective cover 300 can cover the release switch 231; when the protective cover 300 covers the release switch 231, the protective cover 300 is penetrated with a locking pin 310, the clamping handle 220 is penetrated in the space enclosed by the protective cover 300 and the locking pin 310, and the locking pin 310 is provided with an electronic lock 320; the controller is communicatively connected to the electronic lock 320 and is used to control the electronic lock 320.

[0029] The isolating switch locking device in this embodiment uses the movable clamp body 200 and the fixed part 120 on the sliding part 110 of the fixed clamp body 100 to clamp and fix the manual operating mechanism of the isolating switch to prevent the operator from accidentally opening the manual operating mechanism of the isolating switch; when locking, first operate the rotating clamp handle 220 so that the cam part 223 on the clamp handle 220 squeezes the movable clamp head 210 so that the movable clamp head 210 abuts against the manual operating mechanism, and at the same time, the pawl 230 is used to engage with the ratchet 211 to achieve the locking and fixation of the clamp handle 220. When unlocking is required, the release switch 231 needs to be pressed to release the engagement between the pawl 230 and the ratchet 211, and the release switch 231 is covered by the protective cover 300, which is locked and fixed to the clamping handle 220 through the locking pin 310 and the electronic lock 320. Only when the controller sends an unlocking signal can the electronic lock 320 be opened, and then the isolating switch locking device can be removed from the manual operating mechanism of the isolating switch, so as to perform corresponding inspection and maintenance operations on the isolating switch. The isolating switch locking device can lock the isolating switch without affecting the existing equipment, has a wider range of applications, and can also avoid the opening of the isolating switch caused by misoperation, thereby improving the safety of the substation during maintenance.

[0030] Furthermore, the protective cover 300 includes a rotating part 301 and two protective parts 302 respectively arranged at both ends of the rotating part 301. The protective parts 302 are provided with pin holes, and the pin holes are used to pass the locking pins 310. The protective cover 300 thus arranged can not only protect the release switch 231 from above, but also protect the two sides of the release switch 231 using the protective parts 302 on both sides, thereby covering and protecting the release switch 231 in three directions, and preventing the release switch 231 from being accidentally opened due to the release switch 231 being pressed by mistake.

[0031] In this embodiment, a stopper is provided at one end of the locking pin 310, and a lock hole is provided at the other end. The diameter of the stopper is larger than the pin hole, and the lock hole is used to set the electronic lock 320. When the locking pin 310 in this embodiment is inserted from the pin hole of one protection part 302 into the pin hole of another protection part 302, the stopper can prevent the locking pin 310 from falling off, and the other end is locked and fixed by the electronic lock 320, thereby improving the stability of the locking and fixing.

[0032] In this embodiment, an elastic member 240 is provided at one end of the pawl 230 away from the ratchet 211. The elastic member 240 is fixed to the clamping handle 220. The elastic member 240 can apply elastic force to the pawl 230 so that the pawl 230 is engaged with the ratchet 211. Pressing the release switch 231 can overcome the elastic force of the elastic member 240 so that the pawl 230 is disengaged from the ratchet 211. The setting of the elastic member 240 can apply elastic force to the pawl 230 so that the pawl 230 is firmly engaged with the ratchet 211, preventing the pawl 230 from being disengaged from the ratchet 211, ensuring that the clamping handle 220 is locked, preventing the movable clamp 210 from loosening, and improving the locking effect of the manual operating mechanism of the disconnector.

[0033] Please continue to refer to Figure 2 The clamping handle 220 is provided with an avoidance groove 221, and the ratchet 230 and the elastic member 240 are both accommodated in the avoidance groove 221. The avoidance groove 221 can provide an avoidance function for the ratchet 230 and the elastic member 240, and can also accommodate the release switch 231 to prevent the release switch 231 from being too protruding, thereby protecting the release switch 231.

[0034] Optionally, a clamping protrusion 222 is provided in the avoidance groove 221, and one end of the elastic member 240 is plugged into the clamping protrusion 222, and the other end is fixed to the ratchet 230. The clamping protrusion 222 can limit and fix the elastic member 240, preventing the elastic member 240 from shaking left and right when pressed, so that the elastic member 240 can apply a stable elastic force to the ratchet 230 and the release switch 231.

[0035] In this embodiment, the release switch 231 and the pawl 230 are integrally formed to simplify the production process, which will not be described in detail here.

[0036] Furthermore, the sliding portion 110 is provided with a slide groove (not shown) extending along its length direction, and the movable clamping body 200 is provided with a sliding protrusion matched with the slide groove. The slide groove can guide the movement of the movable clamping body 200, ensuring the smooth movement of the movable clamping body 200, thereby improving the locking protection effect of the manual operating mechanism of the disconnector.

[0037] As a preferred embodiment, a stopper (not shown) is provided at one end of the slide groove away from the fixing portion 120. The stopper can prevent the movable clamp 200 from falling off the sliding portion 110, play a foolproof role, and improve the convenience of operation.

[0038] It should be noted that the fixing portion 120 and the sliding portion 110 are integrally formed. The integrally formed structure can simplify the forming process of the fixing clamp 100, reduce the production difficulty, and thus reduce the production cost.

[0039] The present embodiment also provides a method for protecting an isolating switch, which is used to operate the isolating switch locking device as described in any of the above schemes, and includes the following steps: S1, locking the isolating switch: placing the manual operating mechanism of the isolating switch between the fixed portion 120 and the movable clamp 210, operating the clamping handle 220 so that the cam portion 223 squeezes the movable clamp 210, and the movable clamp 210 and the fixed portion 120 clamp the manual operating mechanism of the isolating switch; S2, locking protection: the pawl 230 is engaged with the ratchet 211, the protective cover 300 is rotated so that the protective cover 300 covers the release switch 231, the locking pin 310 is inserted, and the electronic lock 320 is set on the locking pin 310; S3, networking protection: the controller is connected to the electronic lock 320 for communication, and if the controller sends an unlocking signal, the electronic lock 320 is opened; otherwise, the electronic lock 320 is always in a locked state.

[0040] When locking and protecting the isolating switch, the isolating switch locking device in this example is used. First, the clamping handle 220 is operated and rotated so that the cam portion 223 on the clamping handle 220 squeezes the movable head so that the movable clamping head 210 abuts against the manual operating mechanism, and the pawl 230 is engaged with the ratchet 211 to achieve the locking and fixing of the clamping handle 220. When unlocking is required, the release switch 231 needs to be pressed to release the engagement of the pawl 230 with the ratchet 211, and the release switch 231 is covered by the protective cover 300, and the protective cover is locked and fixed on the clamping handle 220 through the locking pin 310 and the electronic lock 320. Only when the controller sends an unlocking signal can the electronic lock 320 be opened, and then the isolating switch locking device can be removed from the manual operating mechanism of the isolating switch, so as to perform corresponding inspection and maintenance operations on the isolating switch. It can avoid the opening of the isolating switch caused by misoperation and improve the safety of the substation during maintenance. The isolating switch protection method can prevent the isolating switch from being opened due to misoperation, thereby improving the safety during substation maintenance.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Isolation switch locking device, characterized in that: include: A fixed clamp body (100), the fixed clamp body (100) comprising a sliding portion (110) and a fixing portion (120) fixedly arranged at either end of the sliding portion (110) along its length direction, the fixing portion (120) being perpendicular to the sliding portion (110); A movable clamp (200) is slidably connected to the sliding portion (110), and a manual operating mechanism of the disconnector can be clamped and fixed between the movable clamp (200) and the fixing portion (120); a movable clamp head (210) and a clamping handle (220) are provided on the movable clamp (200), and the clamping handle (220) is provided with a cam portion (223), and the cam portion (223) can be moved by operating the clamping handle (220). The movable clamp (200) is provided with a ratchet (211), the clamping handle (220) is provided with a pawl (230), the pawl (230) is meshed with the ratchet (211), and the pawl (230) is provided with a release switch (231), and pressing the release switch (231) can cause the pawl (230) to disengage from the ratchet (211); A protective cover (300), the protective cover (300) is rotatably connected to the clamping handle (220), and the protective cover (300) can cover the release switch (231); when the protective cover (300) covers the release switch (231), the protective cover (300) is provided with a locking pin (310), the clamping handle (220) is provided in a space enclosed by the protective cover (300) and the locking pin (310), and the locking pin (310) is provided with an electronic lock (320); A controller is communicatively connected to the electronic lock (320) and is used to control the electronic lock (320).

2. The isolating switch locking device according to claim 1, characterized in that: The protective cover (300) comprises a rotating part (301) and two protective parts (302) respectively arranged at two ends of the rotating part (301); the protective part (302) is provided with a pin hole, and the pin hole is used to pass the locking pin (310).

3. The isolating switch locking device according to claim 2, characterized in that: The locking pin (310) is provided with a stopper at one end and a lock hole at the other end. The diameter of the stopper is larger than that of the pin hole. The lock hole is used to set the electronic lock (320).

4. The isolating switch locking device according to claim 1, characterized in that: An elastic member (240) is provided at one end of the pawl (230) away from the ratchet (211); the elastic member (240) is fixed to the clamping handle (220); the elastic member (240) can apply an elastic force to the pawl (230) so that the pawl (230) and the ratchet (211) are engaged; pressing the release switch (231) can overcome the elastic force of the elastic member (240) so that the pawl (230) and the ratchet (211) are disengaged.

5. The isolating switch locking device according to claim 4, characterized in that: The clamping handle (220) is provided with an escape groove (221), and the ratchet pawl (230) and the elastic member (240) are both accommodated in the escape groove (221).

6. The isolating switch locking device according to claim 5, characterized in that: A clamping protrusion (222) is provided in the avoidance groove (221); one end of the elastic member (240) is plugged into the clamping protrusion (222), and the other end is fixed to the ratchet (230).

7. The isolating switch locking device according to claim 1, characterized in that: The sliding portion (110) is provided with a sliding groove extending along its length direction, and the movable clamping body (200) is provided with a sliding protrusion cooperating with the sliding groove.

8. The isolating switch locking device according to claim 7, characterized in that: A stop block is provided at one end of the sliding groove away from the fixing portion (120).

9. The isolating switch locking device according to claim 7, characterized in that: The fixing portion (120) and the sliding portion (110) are integrally formed.

10. A method for isolating switch protection, characterized in that: The isolating switch locking device used to operate any one of claims 1 to 9 comprises the steps of: S1. Locking the isolating switch: placing the manual operating mechanism of the isolating switch between the fixed portion (120) and the movable clamp (210), operating the clamping handle (220) so that the cam portion (223) squeezes the movable clamp (210), and the movable clamp (210) and the fixed portion (120) clamp the manual operating mechanism of the isolating switch; S2, locking protection: the pawl (230) is meshed with the ratchet (211), the protective cover (300) is rotated so that the protective cover (300) covers the release switch (231), the locking pin (310) is inserted, and the electronic lock (320) is set on the locking pin (310); S3, network protection: the controller is connected to the electronic lock (320) for communication. If the controller sends an unlocking signal, the electronic lock (320) is opened; otherwise, the electronic lock (320) is always in a locked state.

Images