An isolating switch and fuse adjustable interlocking protection structure

Abstract

The utility model relates to a kind of adjustable interlock protection structure of disconnecting switch and fuse, disconnecting switch includes disconnecting switch shell;Main shaft being arranged in disconnecting switch shell;Fuse mechanism includes fuse cover;With the rotation connection of fuse cover protective door;The protection structure includes: interlock shaft pin, eccentric in main shaft end portion;Locking mechanism, it penetrates fuse cover upper end surface, it includes with the rotation connection of fuse cover rotating buckle, is arranged between rotating buckle and fuse cover elastic reset piece, third connecting rod passing through rotating buckle upper end surface, is arranged in the lock slot of protective door inner side;First connecting rod, one end is connected with the interlock shaft pin being arranged on disconnecting switch, the other end is equipped with the second connecting rod penetrating first connecting rod, second connecting rod is just above third connecting rod;The utility model is driven interlock structure action by disconnecting switch opening and closing action, ensure that disconnecting switch closing, line live, cannot carry out fuse replacement operation.

Description

Technical Field

[0001] This utility model relates to the field of adjustable interlocking protection structure of disconnecting switch and fuse. Background Technology

[0002] A disconnecting switch is an electrical device used for isolation in power distribution systems to ensure the safety of other electrical equipment during maintenance. Currently, disconnecting switch-fuse groups are widely used in new energy applications to protect lines and systems. When a short-circuit current occurs in the line, the fuse melts quickly, and the disconnecting switch is used to disconnect the circuit when the fuse is replaced, thus providing isolation.

[0003] If the disconnecting switch is in the closed position and the line is energized during fuse replacement, a serious accident will occur.

[0004] Chinese patent CN200610096620.5 discloses a disconnecting switch fuse assembly, including a disconnecting switch body and a fuse body. The disconnecting switch body includes a housing, a rotating shaft, and moving and stationary contacts. The moving and stationary contacts close and open with the rotation of the rotating shaft. The fuse body includes a base and a cover. The cover is characterized by a locking hook, and a locking rod is provided at a corresponding position on the housing, which is linked to the rotating shaft. The locking rod locks and separates with the locking hook as the rotating shaft rotates, forming an interlocking mechanism. A through groove is provided at a corresponding position on the housing and the locking hook, allowing the locking rod to slide within the through groove. A cam is provided on the rotating shaft relative to the locking rod, engaging with it. A boss is provided on the locking rod near the rotating shaft, and a compression spring is provided between the boss and the end face of the through groove to drive the locking rod against the cam surface. The interlocking function in this structure prevents misoperation and avoids serious safety accidents. However, it uses a rotating shaft to drive the locking rod, and the locking rod and spring work together to insert or release the locking hook, thereby restricting the opening of the cover. The structure is relatively complex, the locking rod and locking hook require high precision to work together, and the cover is prone to shaking when opened. Utility Model Content

[0005] To prevent the disconnector switch from being in the closed position during fuse replacement, this invention provides an adjustable interlocking protection structure between the disconnector switch and the fuse. This invention uses the opening and closing action of the disconnector switch to activate the interlocking structure, ensuring that fuse replacement cannot be performed when the disconnector switch is closed and the line is energized. When the disconnector switch is open, it automatically unlocks, without affecting fuse replacement. Furthermore, the interlocking protection structure has a certain adjustment range in three dimensions: front-back, left-right, and up-down, according to site conditions and customer requirements. This interlocking protection structure can be installed on both the left and right sides of the switch.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] An adjustable interlocking protection structure for a disconnecting switch and a fuse is provided for safety interlocking between the disconnecting switch and the fuse. The disconnecting switch includes a disconnecting switch housing; a main shaft disposed within the disconnecting switch housing; the fuse includes a fuse cover; and a protective door rotatably connected to the fuse cover. The adjustable interlocking protection structure includes:

[0008] An interlocking pin is eccentrically located at the end of the main shaft;

[0009] The locking mechanism extends through the upper end face of the fuse cover and includes a rotating latch piece rotatably connected to the fuse cover, an elastic reset member disposed between the rotating latch piece and the fuse cover, a third connecting rod passing through the upper end face of the rotating latch piece, and a latching groove disposed on the inner side of the protective door.

[0010] The first link has one end connected to the interlocking pin on the disconnect switch, and the other end has a second link that passes through the first link. The second link is located directly above the third link.

[0011] When the main shaft rotates counterclockwise, it drives the first connecting rod to move downward, and the second connecting rod presses the third connecting rod to move downward, thereby driving the rotating fastener to rotate downward until the rotating fastener is inserted into the locking groove, thereby locking the fuse cover and the protective door.

[0012] Furthermore, a connector is provided between the interlocking pin and the main shaft, with one end of the connector connected to the interlocking pin and the other end connected to the main shaft; optionally, the connection between the connector, the interlocking pin, and the main shaft is a screw connection.

[0013] Furthermore, the first connecting rod is sleeved on the interlocking pin.

[0014] Furthermore, the rotating fastener includes a first fastener portion and a second fastener portion connected together; the second fastener portion is provided with a limiting angle and a locking angle on the side opposite to the first fastener portion, the limiting angle is used to limit the rotation range of the rotating fastener, and the locking angle is used to lock with the locking groove.

[0015] Furthermore, a limiting boss is provided on one side of the second latch portion near the locking angle, one end of the elastic reset member is connected to the limiting boss and the other end is connected to the elastic reset member mounting hole provided on the upper end face of the fuse cover.

[0016] Furthermore, the intersection of the first and second latching parts is rotatably connected to the fuse cover.

[0017] Furthermore, the upper end face of the fuse cover is provided with a rotating latching groove, the limiting angle is located in the rotating latching groove, and the locking angle can pass through the bottom of the rotating latching groove and lock with the locking groove.

[0018] Furthermore, the adjustable interlocking protection structure also includes a side plate, which is disposed on the outer wall of the disconnector housing and below the interlocking pin. The side plate is provided with a limiting groove located directly below the interlocking pin, and the first connecting rod passes through the limiting groove.

[0019] Furthermore, the elastic reset element is a spring.

[0020] Furthermore, there are two locking slots that are symmetrically distributed on the inside of the protective door.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) This utility model provides an adjustable interlocking protection structure for disconnecting switch and fuse. When the disconnecting switch is closed, the locking mechanism is in a locked state, and the fuse protection door cannot be opened to replace the fuse. When the disconnecting switch is open, the locking mechanism is released, and the protection door can be opened to perform operations such as replacing the fuse, thus protecting personnel safety.

[0023] (2) This utility model provides an adjustable interlocking protection structure for disconnecting switches and fuses. The structure is adjustable and can be adjusted in three dimensions: front and back, left and right, and up and down, according to the on-site working conditions and customer requirements.

[0024] (3) This utility model provides an adjustable interlocking protection structure for disconnecting switch and fuse. This structure can be installed in two positions: the left side or the right side of the switch. At the same time, the rotating latch of the fuse interlocking protection structure can also be installed in a symmetrical position as needed. When the disconnecting switch and fuse interlocking protection structure is installed on the left side of the switch, the rotating latch is installed facing left inside the fuse housing. When the disconnecting switch and fuse interlocking protection structure is installed on the right side of the switch, the rotating latch is installed facing right inside the fuse housing. Attached Figure Description

[0025] Figure 1 This is the first assembly form of the adjustable interlocking protection structure of the disconnecting switch and fuse in this invention;

[0026] Figure 2 This is the second assembly form of the adjustable interlocking protection structure of the disconnecting switch and fuse in this invention;

[0027] Figure 3 This is a partial detail view of the assembly of the adjustable interlocking protection structure of the disconnecting switch and fuse and the fuse mechanism in this invention;

[0028] Figure 4 This is a schematic diagram of the disconnecting switch in this invention;

[0029] Figure 5 This is a diagram showing the internal structure of the disconnector switch in this invention;

[0030] Figure 6 This is a side view of the disconnecting switch in this invention;

[0031] Figure 7 This is an assembly diagram of the first connecting rod and the interlocking pin in this invention;

[0032] Figure 8 This is a schematic diagram of the rotating fastener in this invention;

[0033] Figure 9 This is a schematic diagram of the protective door in the fuse mechanism of the present invention;

[0034] Figure 10 This is an exploded view of the fuse cover and the rotating latch in this invention;

[0035] Figure 11 This is a schematic diagram of the fuse cover in this invention;

[0036] Figure 12 This is an assembly diagram of the fuse cover and the rotating fastener in this invention;

[0037] The numbers in the diagram indicate: 1-Disconnecting switch; 11-Interlocking pin; 12-Side plate; 1201-Limiting groove; 13-Main shaft of the mechanism; 14-Disconnecting switch mechanism; 2-Adjustable interlocking protection structure; 21-First connecting rod; 2101-Adjustable position hole; 22-Second connecting rod; 23-Rotating fastener; 2301-Rotation center hole; 2302-Limiting angle; 2303-Spring limiting boss; 2304-Lock angle; 2305-Second connecting rod mounting hole; 24-Elastic reset component; 25-Third connecting rod; 26-Shaft sleeve; 27-Limiting sleeve; 3 - Fuse mechanism; 31- Protective door; 3101- Clearance groove; 3102- Edge reinforcing rib; 3103- Locking groove; 3104- Rotary positioning shaft; 32- Fuse; 33- Fuse cover; 3301- Rotary latching groove; 3302- Protective door mounting hole; 3303- Protective door padlock structure; 3304- Rotary latching mounting hole; 3305- Heat dissipation groove; 3306- Handling handle; 3307- Busbar clearance groove; 3308- Angle iron mounting hole; 3309- Elastic reset component mounting hole; 34- Angle iron; 35- Busbar. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0039] Example

[0040] To prevent the disconnector switch from being in the closed position during fuse replacement, this embodiment provides an adjustable interlocking protection structure between the disconnector switch 1 and the fuse mechanism 3 for safety interlocking. See the specific structure below. Figure 1-12 .

[0041] The disconnect switch 1 includes a disconnect switch housing; a main shaft 13 disposed within the disconnect switch housing; the fuse mechanism 3 includes a fuse cover 33; and a protective door 31 rotatably connected to the fuse cover 33. Specifically, the fuse cover 33 and the protective door 31 are rotatably connected as one unit through the protective door mounting hole 3302.

[0042] The adjustable interlocking protection structure includes an interlocking pin 11, a locking mechanism, and a first connecting rod 21.

[0043] The interlocking pin 11 is eccentrically located at the end of the main shaft 13;

[0044] The locking mechanism penetrates the upper end face of the fuse cover 33 and includes a rotating fastener 23 rotatably connected to the fuse cover 33, an elastic reset member 24 disposed between the rotating fastener 23 and the fuse cover 33, a third connecting rod 25 passing through the upper end face of the rotating fastener 23, and a locking groove 3103 disposed inside the protective door 31.

[0045] One end of the first connecting rod 21 is connected to the interlocking pin 11 provided on the disconnecting switch 1, and the other end is provided with a second connecting rod 22 that passes through the first connecting rod 21. The second connecting rod is located directly above the third connecting rod 25.

[0046] When the main shaft 13 rotates counterclockwise, it drives the first connecting rod 21 to move downwards, and the second connecting rod 22 presses the third connecting rod 25 to move downwards, thereby driving the rotating fastener 23 to rotate downwards until the rotating fastener 23 is inserted into the locking groove 3103, thereby locking the fuse cover 33 and the protective door 31. In this embodiment, the counterclockwise rotation of the main shaft 13 is a conventional technique in the art, and the rotation structure can refer to the structure described in existing patent 202411525234.8.

[0047] In this utility model, a connector is provided between the interlocking pin 11 and the main shaft 13. One end of the connector is connected to the interlocking pin 11 and the other end is connected to the main shaft 13. Optionally, the connection between the connector and the interlocking pin 11 and the main shaft 13 is a screw connection.

[0048] Please refer to the following: Figure 7 In this invention, the first connecting rod 21 is sleeved on the interlocking pin 11. Preferably, the upper end of the first connecting rod 21 is fixed to the interlocking pin 11 by screws, bushing 26, and limiting sleeve 27.

[0049] In this invention, the rotating fastener 23 includes a first fastener portion and a second fastener portion connected together. The second fastener portion, on the side opposite to the first fastener portion, is provided with a limiting angle 2302 and a locking angle 2304. The limiting angle 2302 is used to limit the rotation range of the rotating fastener 23, and the locking angle 2304 is used to lock with the locking groove 3103. The included angle between the first fastener portion and the second fastener portion is less than 90°, the included angle between the second fastener portion and the limiting angle 2302 is 90°, and the included angle between the second fastener portion and the locking angle 2304 is greater than or equal to 90°.

[0050] Please participate again. Figure 8 In this utility model, a limiting boss 2303 is provided on the side of the second fastener portion near the locking angle 2304. One end of the elastic reset member 24 is connected to the limiting boss 2303 and the other end is connected to the elastic reset member mounting hole 3309 provided on the upper surface of the fuse cover 33.

[0051] Please see again. Figure 10-12 In this invention, the intersection of the first and second fastening tabs is rotatably connected to the fuse housing 33. Specifically, the intersection of the first and second fastening tabs is provided with a rotating tab rotation center hole 2301, and the rotating tab 23 is assembled into the rotating tab groove 3301 by screws through the rotating tab rotation center hole 2301 and the rotating tab mounting hole 3304 of the fuse housing 33.

[0052] In this utility model, the upper end face of the fuse cover 33 is provided with a rotating latching groove 3301, the limiting angle 2302 is located in the rotating latching groove 3301, and the locking angle 2304 can pass through the bottom of the rotating latching groove 3301 and lock with the locking groove 3103.

[0053] Please see Figure 4In this utility model, the adjustable interlocking protection structure further includes a side plate 12, which is disposed on the outer wall of the disconnector housing and below the interlocking pin 11. The side plate 12 is provided with a limiting groove 1201 located directly below the interlocking pin 11, and the first connecting rod 21 passes through the limiting groove 1201.

[0054] In this invention, the elastic reset member 24 is a spring.

[0055] Please see Figure 9 In this utility model, there are two locking grooves 3103, which are symmetrically distributed on the inner side of the protective door 31.

[0056] Working principle:

[0057] When the disconnector switch 1 is closed, the disconnector switch mechanism 14 performs a closing action, causing the main shaft 13 to rotate counterclockwise. The interlocking pin 11 fixed on it also rotates counterclockwise at the same time, causing the first link 21 of the adjustable interlocking protection structure 2 to move downward. The second link 22 installed on the first link 21 moves downward synchronously, hitting the third link 25 on the rotating latch 23 in the adjustable interlocking protection structure 2 and continuously pressing it downward, causing the rotating latch 23 to rotate. Finally, the front locking angle 2304 of the rotating latch 23 is inserted into the locking groove 3103 of the protective door 31 and reaches the locking position. At this time, the fuse protective door 31 cannot be opened, and the fuse 32 cannot be replaced. When the disconnector switch 1 is tripped, the main shaft interlocking pin 11 rotates clockwise, causing the first link 21 and the second link 22 of the interlocking protection device 2 to move upward. The downward pressure of the second link 22 on the third link 25 on the rotating latch 23 gradually disappears. A compression elastic reset component 24 is installed under the limiting boss 2303 of the rotating latch 23. The compression spring force is released, pushing the rotating latch 23 to gradually reset, and the locking effect disappears. At this time, the fuse protection door 31 can be opened to perform relevant operations.

[0058] The upper end of the first connecting rod 21 is fixed to the interlocking pin 11 by screws, bushing 26, and limiting sleeve 27. Figure 7 The first connecting rod 21 passes through the limiting groove 1201 of the side plate 12, see Figure 1-2Therefore, when the switch is opened or closed, it drives the first connecting rod 21 and the second connecting rod 22 above it to move up and down. The lower end of the first connecting rod 21 has an adjustable position hole 2101, and the lower end of the first connecting rod 21 is connected to the second connecting rod 22. The second connecting rod 22 can be installed on either side of the first connecting rod 21 as needed. An elastic reset element 24 is installed in the elastic reset element mounting hole 3309 of the fuse cover 33. The rotating latch 23 is assembled into the rotating latch slot 3301 by screws through the rotating latch rotation center hole 2301 and the rotating latch mounting hole 3304 of the fuse cover 33. When the disconnecting switch 1 is closed, the third connecting rod 25 connected to the rotating latch 23 is impacted by the second connecting rod 22 of the first connecting rod 21. The rotating latch 23 rotates clockwise and reaches the locking position. The locking angle 2304 of the rotating latch 23 is inserted into the locking slot 3103 of the protective door 31. The locking cannot open the protective door 31. When the disconnecting switch 1 is opened, the rotating latch 23 rotates clockwise and reaches the locking position. The pressure on the latching piece 23 and its third link 25 disappears. Under the compressive force of the elastic reset member 24, the rotating latching piece 23 rotates counterclockwise. Finally, the limiting angle 2302 of the rotating latching piece 23 touches the bottom of the rotating latching piece groove 3301 of the fuse cover 33. The rotating latching piece 23 reaches the limiting position, preventing the rotating latching piece 23 and the elastic reset member 24 from over-rotating. This improves the reliability of the engagement between the rotating latching piece 23 and its third link 25 and the first link 21 and its second link 22. The rotating latching piece 23 can be selected to be installed on the left or right side of the rotating latching piece groove 3301 of the fuse cover 33 as needed. See Figure 12 The dotted line in the diagram indicates the installation configuration on the left side of the rotating fastener slot 3301. The third connecting rod 25 mounted on the rotating fastener 23 can be installed in any direction of the rotating fastener 23 as needed. Figure 3 The fuse housing 33 has a slotted top and a hollowed-out bottom design to facilitate the assembly of the fuse and busbar 35. The fuse housing 33 has heat dissipation grooves 3305 on its sides and back. A protective door padlock structure 3303 is provided on the fuse housing 33. Handles 3306 are provided on both sides of the fuse housing 33. The busbar 35 is inserted into the fuse housing 33 through a busbar clearance groove 3307. The fuse 32 is connected to the busbar 35 with screws. The fuse housing 33 connects and fixes the angle iron 34 to the busbar 35 through angle iron mounting holes 3308. The protective door 31 contains two locking grooves 3103, used to accommodate the left and right installation methods of the rotating latch 23. See [link to relevant documentation]. Figure 9 .

[0059] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An adjustable interlocking protection structure for a disconnector switch and a fuse, used for safety interlocking between a disconnector switch (1) and a fuse mechanism (3), wherein the disconnector switch (1) includes a disconnector switch housing; a main shaft (13) disposed within the disconnector switch housing; the fuse mechanism (3) includes a fuse cover (33); and a protective door (31) rotatably connected to the fuse cover (33); characterized in that, The adjustable interlocking protection structure includes: Interlocking pin (11), which is eccentrically located at the end of the main shaft (13); The locking mechanism extends through the upper end face of the fuse cover (33) and includes a rotating latch (23) rotatably connected to the fuse cover (33), an elastic reset member (24) disposed between the rotating latch (23) and the fuse cover (33), a third connecting rod (25) passing through the upper end face of the rotating latch (23), and a locking groove (3103) disposed inside the protective door (31); The first link (21) has one end connected to the interlocking pin (11) on the disconnecting switch (1), and the other end is provided with a second link (22) that passes through the first link (21). The second link is located directly above the third link (25). When the main shaft (13) rotates counterclockwise, it drives the first connecting rod (21) to move downward, and the second connecting rod (22) presses the third connecting rod (25) to move downward, thereby driving the rotating fastener (23) to rotate downward until the rotating fastener (23) is inserted into the locking groove (3103), thereby locking the fuse cover (33) and the protective door (31).

2. The isolating switch and fuse adjustable interlocking protection structure according to claim 1, characterized in that, A connector is provided between the interlocking pin (11) and the main shaft (13), with one end of the connector connected to the interlocking pin (11) and the other end connected to the main shaft (13).

3. The isolator and fuse adjustable interlock protection structure according to claim 1, characterized in that, The first connecting rod (21) is sleeved on the interlocking pin (11).

4. The isolator and fuse adjustable interlock protection structure according to claim 1, characterized in that, The rotating fastener (23) includes a first fastener portion and a second fastener portion connected together; The second fastener portion is provided with a limiting angle (2302) and a locking angle (2304) on the side opposite to the first fastener portion. The limiting angle (2302) is used to limit the rotation range of the rotating fastener (23), and the locking angle (2304) is used to lock with the locking groove (3103).

5. The isolating switch and fuse adjustable interlock protection structure according to claim 4, characterized in that, The second latch portion has a limiting boss (2303) on one side near the locking angle (2304). One end of the elastic reset member (24) is connected to the limiting boss (2303) and the other end is connected to the elastic reset member mounting hole (3309) on the upper surface of the fuse cover (33).

6. The separable connector adjustable interlock protection structure of claim 4, wherein, The intersection of the first and second fastening parts is rotatably connected to the fuse cover (33).

7. The separable connector adjustable interlock protection structure of claim 4, wherein, The upper end face of the fuse cover (33) is provided with a rotating latching groove (3301), the limiting angle (2302) is located in the rotating latching groove (3301), and the locking angle (2304) can pass through the bottom of the rotating latching groove (3301) and lock with the locking groove (3103).

8. The isolator and fuse adjustable interlock protection structure according to claim 1, wherein, The adjustable interlocking protection structure also includes a side plate (12), which is located on the outer wall of the disconnector housing and below the interlocking pin (11). The side plate (12) has a limiting groove (1201) located directly below the interlocking pin (11), and the first connecting rod (21) passes through the limiting groove (1201).

9. The isolator and fuse adjustable interlock protection structure according to claim 1, wherein, The elastic reset element (24) is a spring.

10. The isolator and fuse adjustable interlock protection structure according to claim 1, wherein, There are two locking slots (3103) that are symmetrically distributed on the inside of the protective door (31).

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