CN213150645U - Knife switch with locking function - Google Patents

Abstract

The application relates to a knife switch with a locking function, which relates to the technical field of the locking of an isolation knife switch, and the main technical scheme of the knife switch comprises a ceramic base, a movable contact hinged on the ceramic base and a stationary contact fixedly arranged on the ceramic base, wherein a locking component for locking the movable contact is arranged on the ceramic base; therefore, when the movable contact and the fixed contact on one ceramic base are closed, the movable contact and the fixed contact on the other ceramic base cannot be closed, and the possibility of accidents is favorably reduced.

Description

Knife switch with locking function

Technical Field

The application relates to the technical field of isolation switch locking, in particular to a switch blade with a locking function.

Background

The knife switch is one of manual switches of power equipment, also called as a knife switch, and has the advantages of simple working principle and overall structure and high working reliability, so that the knife switch is widely applied to various electrical switches and is applied to a substation and a box-type transformer.

In the related technology, an isolation disconnecting link and a grounding disconnecting link are respectively arranged in the box-type power converters, and when the two box-type power converters are connected to a collecting line, the two box-type power converters share a set of power supply circuit; when the box-type transformer needs to be overhauled, the grounding disconnecting link needs to be closed, the isolation disconnecting link is separated before the grounding disconnecting link is closed, and meanwhile, the isolation disconnecting link of another box-type transformer needs to be kept in a separated state.

In view of the above-mentioned related technologies, the inventor believes that when a box-type transformer needs to be overhauled, a grounding knife switch is not directly associated with an isolation knife switch on another box-type transformer, so that whether the isolation knife switch in another box-type transformer is separated or not cannot be known in time when the grounding knife switch is turned off, which may cause an accident during the overhaul process.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that accidents are easy to happen when a grounding knife switch is closed, the application provides a knife switch with a locking function.

The application provides a plug-in strip with shutting function adopts following technical scheme:

the utility model provides a plug-in strip with shutting function, includes porcelain base, articulates the movable contact on porcelain base and the fixed stationary contact that sets up on porcelain base, establish the shutting subassembly that is used for locking the movable contact on the porcelain base, rotate on the porcelain base and connect the lock core that is used for opening and close the shutting subassembly, the lock core interpolation is equipped with the key, be equipped with on the porcelain base and be used for locking the locking subassembly on the lock core with the key, the locking subassembly with the movable contact is connected.

By adopting the technical scheme, when the transformer is used, the porcelain bases are fixed on the two box-type transformers, the movable contact is fixed through the locking component, when the movable contact and the static contact on one of the porcelain bases are required to be closed, the key is firstly inserted into the corresponding lock cylinder to drive the lock cylinder to rotate, the movable contact is released from being fixed by the locking component, then the movable contact is pulled to rotate towards one side close to the static contact, and the movable contact is closed after being contacted with the static contact; when the movable contact and the fixed contact are closed, the locking assembly fixes the key in the lock cylinder; when the movable contact on the other porcelain base needs to be closed, the same key is used for unlocking the movable contact by the locking component; when the key needs to be taken down, the movable contact and the fixed contact need to be separated firstly, and after the movable contact is fixed by the locking component, the movable contact can release the locking of the locking component on the key, and the key can be taken down from the lock cylinder; therefore, when the movable contact and the fixed contact on one ceramic base are closed, the movable contact and the fixed contact on the other ceramic base cannot be closed, and the possibility of accidents is favorably reduced.

Optionally, the locking assembly includes a driving bevel gear fixedly connected to the lock cylinder, a transmission shaft rotatably connected to the inside of the porcelain base, and a locking shaft rotatably connected to the inside of the porcelain base, the transmission shaft is provided with a driven bevel gear engaged with the driving bevel gear, the locking shaft is connected to the porcelain base in a sliding manner, a driving member connected to the transmission shaft and used for driving the locking shaft to slide is arranged in the porcelain base, the porcelain base is provided with a locking groove for inserting the movable contact, and one end of the locking shaft extends into the locking groove.

By adopting the technical scheme, when the movable contact is unlocked, when the lock cylinder rotates, the lock cylinder drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the transmission shaft to rotate, the transmission shaft drives the locking shaft to slide through the driving part, the locking shaft leaves the locking groove and extends into the porcelain base, and the movable contact smoothly rotates and leaves the locking groove, so that the movable contact is smoothly unlocked.

Optionally, the driving piece comprises a locking worm fixedly connected to the transmission shaft, a locking worm wheel is connected to the ceramic base in a rotating mode, one end, far away from the locking groove, of the locking shaft penetrates through the locking worm wheel, the locking shaft is in threaded connection with the locking worm wheel, a limiting block is fixedly connected to the ceramic base, and the limiting block is connected with the locking shaft in a sliding mode.

By adopting the technical scheme, when the transmission shaft rotates, the locking worm is driven to rotate, the locking worm drives the locking worm wheel to rotate, when the locking worm rotates, the locking shaft starts to slide due to the fact that the limiting block limits the rotation of the locking shaft, the locking shaft is driven to rotate smoothly, meanwhile, the self-locking of the worm wheel and the worm is kept away, and after the key is pulled out of the lock cylinder, the possibility that the locking shaft slides automatically is reduced.

Optionally, an insulating ceramic handle is fixedly connected to the moving contact, the insulating ceramic handle is inserted into the locking groove, and a locking hole into which the locking shaft is inserted is formed in the insulating ceramic handle.

By adopting the technical scheme, the locking shaft is inserted into the locking groove and then inserted into the locking hole, so that the connection strength of the locking shaft to the movable contact is increased, and the fixing effect of the movable contact is improved.

Optionally, the locking subassembly is including sliding ejector pin, the inserted bar of fixed connection on the ejector pin of connection on the porcelain base and the locking lever of connection on the porcelain base that slides, the end wall of ejector pin stretches into the locking inslot, the one end that the ejector pin is located the porcelain base is equipped with locking spring, locking spring's end wall is inconsistent with the inside wall of porcelain base, the end wall of locking lever stretches into in the porcelain base, the porcelain base stretches into the one end in the porcelain base and is equipped with and supplies inserted bar male jack, the one end fixedly connected with locking block of locking lever is kept away from to the locking lever, the locking block with the lock core sets up relatively.

By adopting the technical scheme, when the insulating ceramic handle is positioned in the locking groove, the insulating ceramic handle extrudes the ejector rod, and the ejector rod drives the locking spring to deform; after the key is inserted into the lock cylinder, the locking rod is inserted into the ceramic base, the locking block is attached to the key, and after the insulating ceramic handle leaves the locking groove, the locking spring recovers deformation, so that the ejector rod is pulled to move, the ejector rod pulls the insertion rod to be inserted into the insertion hole, the locking rod is fixed on the ceramic base, and the key is smoothly fixed in the lock cylinder.

Optionally, one side of the locking block close to the lock cylinder is rotatably connected with a rotary disc.

Through adopting above-mentioned technical scheme, after the locking piece offseted with the key, when rotating the key, the key drives the carousel and rotates to conveniently rotate the key.

Optionally, one end of the insertion rod inserted into the insertion hole is provided with a tip.

By adopting the technical scheme, the cross sectional area of the tip is smaller than that of the jack, so that the inserted rod can be conveniently and smoothly inserted into the jack.

Optionally, a flip cover is arranged on the porcelain base and covers the lock cylinder.

By adopting the technical scheme, after the key is taken down, the lock cylinder is closed by the turnover cover, so that the possibility of entering foreign matters in the lock cylinder is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when in use, a porcelain base is arranged in each of the two box-type transformers, when a movable contact and a static contact on one of the porcelain bases are required to be closed, a key is firstly inserted into the lock cylinder, the lock core is driven by the key to rotate to release the locking of the locking component to the movable contact, the movable contact is driven to rotate to close with the static contact, meanwhile, the key is fixed in the lock cylinder by using the locking assembly, when the movable contact and the fixed contact in another box-type transformer need to be closed, the same key is used, when the key is taken down, the movable contact and the fixed contact on the porcelain base are separated firstly, then the key is utilized to drive the lock core to rotate so as to lock the movable contact, the movable contact releases the locking of the locking component to the key, the key is smoothly taken down and inserted into the lock cylinder on the other ceramic base to release the fixation of the locking assembly on the movable contact, so that the movable contact and the fixed contact on the other ceramic base are closed; therefore, the possibility of simultaneous closing of the movable contact and the fixed contact on the two ceramic bases is reduced, and the possibility of accidents is reduced.

2. When the movable contact is locked, the locking shaft is inserted into the locking hole, so that the connection strength between the locking shaft and the movable contact is increased, and the movable contact is fixed;

3. when the locking block is attached to the key and the key is rotated, the key drives the turntable to rotate, so that resistance applied to the rotation of the key is reduced, and the key is convenient to rotate.

Drawings

Fig. 1 is a schematic view of the overall structure of a knife blade with a locking function in the embodiment of the present application.

FIG. 2 is a cross-sectional view of the porcelain base, the locking hole, the locking assembly and the locking assembly with the key inserted into the lock cylinder in an embodiment of the present application.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 3.

Description of reference numerals: 1. a porcelain base; 11. a movable contact; 111. an insulating ceramic handle; 112. a locking hole; 12. a stationary contact; 13. a locking block; 131. a locking groove; 132. a locking cavity; 14. a lock cylinder; 15. a key; 16. an indicator light; 17. a cover is turned; 2. a locking assembly; 21. a drive bevel gear; 22. a drive shaft; 221. a driven bevel gear; 23. a latching shaft; 231. a limiting groove; 24. a drive member; 241. locking the worm; 242. locking the worm gear; 243. a limiting block; 3. a locking assembly; 31. a top rod; 311. a locking spring; 32. inserting a rod; 321. a tip; 33. a locking lever; 331. a jack; 332. a locking block; 333. a turntable.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses plug-in strip with shutting function.

According to the drawing 1, the knife switch with the locking function comprises two ceramic bases 1, a movable contact 11 is hinged to the top wall of each ceramic base 1, a fixed contact 12 opposite to the movable contact 11 is fixedly connected to the top wall of each ceramic base 1 through a bolt, an insulating ceramic handle 111 is inserted into one end, away from the ceramic base 1, of the movable contact 11, the insulating ceramic handle 111 is fixedly connected with the movable contact 11, a locking block 13 is integrally manufactured on each ceramic base 1, the locking block 13 is made of ceramic, and a locking groove 131 for the insulating ceramic handle 111 to insert is formed in the locking block 13.

Referring to fig. 2 and 3, a locking assembly 2 for fixing an insulating porcelain handle 111 in a locking groove 131 is arranged on a locking block 13, a lock cylinder 14 for opening and closing the locking assembly 2 is rotatably connected in the locking block 13, a key 15 is inserted into the lock cylinder 14, only one key 15 is arranged on the key 15, a locking assembly 3 for fixing the key 15 on the lock cylinder 14 is arranged on a porcelain base 1, and the locking assembly 3 is connected with the insulating porcelain handle 111; when the isolating switch is required to be closed, a key 15 is firstly inserted into the lock cylinder 14, the lock cylinder 14 is driven to rotate by screwing the key 15, the lock cylinder 14 unlocks the insulating ceramic handle 111 from the locking component 2, the insulating ceramic handle 111 is pulled to leave the locking groove 131, the insulating ceramic handle 111 is rotated, the movable contact 11 and the stationary contact 12 are driven to be closed, the closing of the isolating switch is completed, and meanwhile the key 15 is fixed in the lock cylinder 14 by utilizing the locking component 3.

Referring to fig. 1, when it is necessary to close the grounding switch in another box-type transformer, the key 15 inserted into the isolating switch must be used, when the key 15 is removed, the insulating ceramic handle 111 is pushed first, so that the movable contact 11 on the isolating switch is separated from the stationary contact 12, the insulating ceramic handle 111 is pushed into the locking groove 131, the key 15 is used to rotate the lock cylinder 14, so that the insulating ceramic handle 111 is fixed in the locking groove 131 by the locking component 2, after the insulating ceramic handle 111 is fixed in the locking groove 131, the insulating ceramic handle 111 releases the fixing of the key 15 by the locking component 3, the key 15 is removed from the isolating switch, the key 15 is inserted into the grounding switch, and the above steps are repeated, so that the grounding switch can be closed; therefore, the possibility of simultaneous closing of the grounding disconnecting link and the isolating disconnecting link is reduced, and the possibility of accidents in the process of overhauling the box-type transformer is reduced

Referring to fig. 2, an indicator light 16 is arranged on the porcelain base 1, and the indicator light 16 is electrically connected with the other porcelain base 1; when the movable contact 11 and the fixed contact 12 on the porcelain base 1 are closed, whether the movable contact 11 and the fixed contact 12 on the other porcelain base 1 are closed or not is judged through the on-off of the indicator light 16, so that an operator can conveniently judge the closing condition of the other porcelain base 1.

Referring to fig. 1 and 3, a flip cover 17 is hinged to the side of the locking block 13, and the flip cover 17 covers the lock cylinder 14; after the key 15 is removed, the flip cover 17 is flipped over to close the lock cylinder 14, thereby reducing the possibility of foreign objects entering the lock cylinder 14 to jam the lock cylinder 14.

Referring to fig. 3, the locking assembly 2 includes a driving bevel gear 21, a transmission shaft 22, a locking shaft 23 and a driving member 24 for driving the locking shaft 23 to move, a locking cavity 132 is formed in the locking block 13, the driving bevel gear 21 is welded on the outer side wall of the lock cylinder 14, the driving bevel gear 21 is located in the locking cavity 132, the transmission shaft 22 is rotatably connected in the locking cavity 132, a driven bevel gear 221 meshed with the driving bevel gear 21 is welded on the transmission shaft 22, the driving member 24 is disposed in the locking cavity 132, the driving member 24 is connected with one end of the transmission shaft 22 away from the driven bevel gear 221, the locking shaft 23 is slidably connected in the locking cavity 132, the end wall of the locking shaft 23 extends into the locking groove 131, and a locking hole 112 for inserting the locking shaft.

Referring to fig. 3 and 4, the driving member 24 includes a locking worm 241 welded on the end wall of the transmission shaft 22, a locking worm wheel 242 is rotatably connected in the locking block 13, the end wall of the locking shaft 23 passes through the locking worm wheel 242, the locking shaft 23 is in threaded connection with the locking worm wheel 242, a limiting block 243 is welded on the inner side wall of the locking block 13, a limiting groove 231 for the limiting block 243 to slide is arranged on the side surface of the locking shaft 23, and the limiting groove 231 is arranged along the axial direction of the locking shaft 23; when the fixing of the insulating ceramic handle 111 is released, firstly, the key 15 is inserted into the lock cylinder 14, the lock cylinder 14 is driven to rotate by screwing the key 15, the lock cylinder 14 drives the driving bevel gear 21 to rotate when rotating, the driving bevel gear 21 drives the driven bevel gear 221 to rotate, the driven bevel gear 221 drives the transmission shaft 22 to rotate, the transmission shaft 22 drives the locking worm 241 to rotate, the locking worm 241 drives the locking worm wheel 242 to rotate, the limit block 243 is arranged in the limit groove 231 to limit the rotation of the locking shaft 23, when the locking worm wheel 242 rotates, the locking shaft 23 is driven to slide, and the locking shaft 23 is separated from the locking hole 112 and gradually extends into the locking cavity 132, so that the fixing of the insulating ceramic handle 111 is successfully released; after the insulating ceramic handle 111 is fixed in the locking groove 131, the locking worm 241 and the locking worm wheel 242 are self-locked after the key 15 is taken down, so that the possibility of automatic sliding of the locking shaft 23 is reduced, and the fixing effect of the insulating ceramic handle 111 is improved.

Referring to fig. 3, the locking assembly 3 includes a carrier rod 31, the locking device comprises an insert rod 32 and a locking rod 33, wherein the ejector rod 31 is connected in the locking block 13 in a sliding manner, one end of the ejector rod 31 extends into the locking groove 131, the axis of the ejector rod 31 is perpendicular to the axis of the locking shaft 23, one end of the ejector rod 31 extending into the locking groove 131 is arranged opposite to the insulating ceramic handle 111, one end of the ejector rod 31 located in the locking block 13 is welded with a locking spring 311, the locking spring 311 is sleeved on the ejector rod 31, the end wall of the locking spring 311 is welded on the inner side wall of the locking block 13, the insert rod 32 is welded at one end of the ejector rod 31 far away from the insulating ceramic handle 111, the axis of the insert rod 32 is parallel to the axis of the ejector rod 31, the locking rod 33 is connected in the locking block 13 in a sliding manner, the axis of the locking rod 33 is perpendicular to the axis of the insert rod 32, the insert.

Referring to fig. 3, one end of the locking rod 33, which is far away from the insert rod 32, extends out of the locking block 13, one end of the locking rod 33, which extends out of the porcelain base 1, is welded with a locking block 332, the locking block 332 and the locking rod 33 are manufactured integrally, the locking block 332 is arranged opposite to the lock cylinder 14, and one side of the locking block 332, which is close to the lock cylinder 14, is rotatably connected with a rotating disc 333; when the insulating ceramic handle 111 is located in the locking groove 131, the insulating ceramic handle 111 extrudes the ejector rod 31, the ejector rod 31 pulls the locking spring 311 to generate stretching deformation, after the key 15 is inserted into the lock cylinder 14, the locking rod 33 is pushed into the ceramic base 1, the locking block 332 pushes the rotary disc 333 to extrude the key 15, then the key 15 is rotated, after the locking groove 131 is opened and closed in the insulating ceramic handle 111, the locking spring 311 recovers deformation, the ejector rod 31 is pulled to move, the ejector rod 31 drives the inserting rod 32 to move, the inserting rod 32 is inserted into the inserting hole 331, the cross-sectional area of the tip 321 is smaller than that of the inserting hole 331, and the inserting rod 32 can be conveniently and smoothly inserted into the inserting hole 331.

Referring to fig. 3, after the insert rod 32 is inserted into the insert hole 331, the locking rod 33 is fixed in the porcelain base 1, the moving range of the key 15 is limited by the rotary disc 333, the key 15 is smoothly fixed in the lock cylinder 14, and when the key 15 needs to be rotated, the key 15 drives the rotary disc 333 to rotate together, so that the resistance applied when the key 15 is rotated is reduced, and the key 15 is convenient to rotate; one side of the ejector rod 31 extending into the locking groove 131 can be provided with an inclined surface, and the inclined surface is arranged towards the insulating ceramic handle 111, so that the ejector rod 31 can be smoothly pushed to move when the insulating ceramic handle 111 is inserted into the locking groove 131.

The implementation principle of a knife switch with a locking function in the embodiment of the application is as follows: when the transformer is used, the porcelain bases 1 are arranged in two box-type transformers, when a movable contact 11 and a fixed contact 12 on the porcelain base 1 in one box-type transformer need to be closed, a key 15 is inserted into the lock cylinder 14, the lock cylinder 14 is rotated by the key 15, so that the movable contact 11 is released from the locking component 2, the movable contact 11 is rotated to be closed with the fixed contact 12, when the movable contact 11 and the fixed contact 12 are closed, the key 15 is locked in the lock cylinder 14 by the locking component 3, and when the movable contact 11 and the fixed contact 12 on the porcelain base 1 in the other box-type transformer are closed, the same key 15 needs to be used; when the key 15 is taken down, the movable contact 11 and the fixed contact 12 on the porcelain base 1 need to be separated firstly, the key 15 is utilized to reversely rotate the lock cylinder 14, the movable contact 11 is fixed on the porcelain base 1, the movable contact 11 releases the locking of the locking component 3 on the key 15, the key 15 is taken down, and then the movable contact 11 and the fixed contact 12 on the porcelain base 1 in another box-type transformer are closed by the key 15; therefore, after the movable contact 11 and the fixed contact 12 on one porcelain base 1 are closed, the movable contact 11 and the fixed contact 12 on the other porcelain base 1 cannot be closed, and the possibility of accidents is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a plug-in strip with shutting function which characterized in that: including porcelain base (1), articulate movable contact (11) on porcelain base (1) and fixed stationary contact (12) of setting on porcelain base (1), establish locking subassembly (2) that are used for locking movable contact (11) on porcelain base (1), rotate on porcelain base (1) and connect lock core (14) that are used for opening and close locking subassembly (2), lock core (14) interpolation is equipped with key (15), be equipped with on porcelain base (1) and be used for locking subassembly (3) on lock core (14) with key (15), locking subassembly (3) with movable contact (11) are connected.

2. The blade with locking function according to claim 1, characterized in that: the locking assembly (2) comprises a driving bevel gear (21) fixedly connected to the lock cylinder (14), a transmission shaft (22) rotatably connected to the inside of the porcelain base (1) and a locking shaft (23) rotatably connected to the inside of the porcelain base (1), a driven bevel gear (221) meshed with the driving bevel gear (21) is arranged on the transmission shaft (22), the locking shaft (23) is connected with the porcelain base (1) in a sliding manner, a driving piece (24) which is connected with the transmission shaft (22) and used for driving the locking shaft (23) to slide is arranged in the porcelain base (1), a locking groove (131) for inserting the movable contact (11) is formed in the porcelain base (1), and one end of the locking shaft (23) extends into the locking groove (131).

3. The blade with locking function according to claim 2, characterized in that: the driving piece (24) comprises a locking worm (241) fixedly connected to the transmission shaft (22), a locking worm wheel (242) is connected to the porcelain base (1) in a rotating mode, the locking worm wheel (242) is passed through by one end, far away from the locking groove (131), of the locking shaft (23), the locking shaft (23) is in threaded connection with the locking worm wheel (242), a limiting block (243) is fixedly connected to the porcelain base (1), and the limiting block (243) is connected with the locking shaft (23) in a sliding mode.

4. The blade with locking function according to claim 2, characterized in that: an insulating porcelain handle (111) is fixedly connected to the movable contact (11), the insulating porcelain handle (111) is inserted into the locking groove (131), and a locking hole (112) for inserting the locking shaft (23) is formed in the insulating porcelain handle (111).

5. The blade with locking function according to claim 1, characterized in that: locking Assembly (3) are including sliding ejector pin (31), the inserted bar (32) of connection on porcelain base (1) and the locking lever (33) of connection on porcelain base (1) of sliding on ejector pin (31), the end wall of ejector pin (31) stretches into in locking groove (131), the one end that ejector pin (31) are located porcelain base (1) is equipped with locking spring (311), the end wall of locking spring (311) is inconsistent with the inside wall of porcelain base (1), the end wall of locking lever (33) stretches into in porcelain base (1), the one end that porcelain base (1) stretched into in porcelain base (1) is equipped with and supplies inserted bar (32) male jack (331), the one end fixedly connected with locking block (332) of locking lever (33) are kept away from in locking lever (33), locking block (332) with lock core (14) set up relatively.

6. The blade with locking function according to claim 5, characterized in that: and a rotary disc (333) is rotatably connected to one side of the locking block (332) close to the lock cylinder (14).

7. The blade with locking function according to claim 5, characterized in that: one end of the insertion rod (32) inserted into the insertion hole (331) is provided with a tip (321).

8. The blade with locking function according to claim 1, characterized in that: be equipped with flip (17) on porcelain base (1), flip (17) cover lock core (14).

Images