Self-cleaning isolating switch

Abstract

According to the technical scheme, the self-cleaning disconnecting switch is characterized in that the self-cleaning disconnecting switch comprises a switch blade seat, a contact seat and a switch blade rod, a protective cover is arranged on the contact seat, the switch blade rod is provided with a movable joint, the switch blade seat comprises a placement groove, symmetrical friction protrusions extending upwards are arranged on the placement groove, and the contact seat is provided with a contact. The friction protrusion is provided with a cavity, the cavity is provided with a friction device, the friction device comprises a spring, a pressing screw, a cushion block and a friction block, the friction block extends out of the friction protrusion and is close to the center line of the knife switch rod, the friction block is in contact with the spring, the pressing screw is arranged on the outer side of the friction protrusion, and the cushion block is arranged on the cushion block. And a cushion block is arranged between the spring tightening screws. According to the utility model, through the arrangement of the friction protrusions, when the knife switch rod is placed in or taken out of the placing groove, the friction blocks can generate friction with the surface of the knife switch rod, stains attached to the knife switch rod and scorching oxidation generated by electric arcs are cleaned, and the occurrence of dangers is reduced.

Description

Technical Field

[0001] This utility model relates to the field of disconnector technology, and more specifically to a self-cleaning disconnector. Background Technology

[0002] Currently, disconnect switches are one of the important pieces of equipment in power distribution networks. There are many types of disconnect switches available. They are mainly used to reliably isolate the parts of high-voltage power distribution equipment that need to be de-energized from the energized parts, so as to ensure the safety of maintenance work.

[0003] However, the above-mentioned existing technologies still have some defects. When in use, dust, oil and other dirt will adhere to the switch blades. When opening and closing, an electric arc may be generated, causing the switch blades to burn. If not cleaned in time, it may lead to poor contact, causing it to heat up, which poses certain safety hazards. It may also cause the transmission rod to jam, affecting the normal use of the disconnect switch. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a self-cleaning disconnect switch.

[0005] To achieve the above objectives, this utility model provides the following technical solution: It includes a knife gate seat, a contact seat, a knife gate rod, and a stationary contact. The knife gate rod is provided with a movable joint. The knife gate seat includes an inclined placement groove. Symmetrical friction protrusions extending upward are provided on the placement groove. Each friction protrusion has a cavity. A friction device is provided in the cavity. The friction device includes a spring, a clamping screw, a pad, and a friction block. The friction block extends from the friction protrusion and is close to the centerline of the knife gate rod. The friction block is in contact with the spring. The clamping screw is located on the outside of the friction protrusion. A pad is provided between the spring and the clamping screw.

[0006] The present invention is further configured such that the friction protrusion is provided with a guide protrusion having an inclined surface.

[0007] The present invention is further configured such that: the guide protrusion is provided with a chip removal groove, and the chip removal groove is provided with a chip removal inclined surface.

[0008] The present invention is further configured such that: the cavity is provided with a limit block, and the friction block is provided with an inclined protrusion.

[0009] The present invention is further configured such that: a spring is provided in the placement groove, and the spring is close to the knife lever.

[0010] The present invention is further configured such that a plurality of clamping screws are provided on one side of the friction protrusion.

[0011] The present invention is further configured such that the movable joint is provided with a limiting pad.

[0012] The present invention is further configured such that: a protective cover is provided on the contact seat, the protective cover is movably connected to the contact seat, a return spring B is provided on the outer side of the connection, and a trigger plate extends into the stationary contact on the inner side of the connection.

[0013] The present invention is further configured such that: the protective cover is provided with an unfolding device, the unfolding device includes a transmission rod with an inclined surface, an action rod that fits with the inclined surface, an unfolding plate, a drive rod, and a return spring A, the drive rod is movably connected to the transmission rod, the transmission rod contacts the action rod, the action rod is connected to the unfolding plate, and the return spring A is disposed on the action rod.

[0014] In summary, this utility model has the following beneficial effects: the friction protrusions allow the friction block to rub against the surface of the switch rod when it is placed into or removed from the slot. This friction cleans the dirt and burnt oxidation from the electric arc on the switch rod, improving the electrical contact effect during closing, reducing abnormal heating of the switch rod, and minimizing the risk of danger.

[0015] The protective cover that automatically closes when the switch is closed protects the switch arm, reduces the adhesion of dirt and keeps the switch arm clean. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0017] Figure 2 This is a side sectional view at point A in this embodiment;

[0018] Figure 3 This is a cross-sectional view at point B in this embodiment.

[0019] Reference numerals: 1. Knife seat; 11. Knife rod; 111. Movable joint; 112. Limiting pad; 2. Protective cover; 21. Unfolding device; 211. Transmission rod; 212. Actuating rod; 213. Unfolding plate; 214. Drive rod; 215. Return spring A; 22. Return spring B; 23. Trigger plate; 3. Placement slot; 31. Spring; 4. Friction protrusion; 41. Friction device; 411. Spring; 412. Clamping screw; 413. Pad; 414. Friction block; 4141. Inclined protrusion; 42. Guide protrusion; 43. Limiting block. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] This embodiment discloses a self-cleaning disconnect switch, such as... Figures 1 to 3As shown, the device includes a knife switch seat 1, a contact seat, a knife switch rod 11, and a stationary contact. The knife switch rod 11 is provided with a movable joint 111. The movable joint 111 allows the knife switch rod 11 to achieve a larger opening degree within a smaller opening range, making this invention more convenient. The knife switch seat 1 includes an inclined placement groove 3, on which symmetrical friction protrusions 4 extending upward are provided. The friction protrusions 4 are provided with cavities, and friction devices 41 are provided in the cavities. The friction devices 41 include a spring 411, a clamping screw 412, a pad 413, and a friction block 414. The friction block 414 extends from the friction protrusions 4 and is close to the centerline of the knife switch rod 11. The friction block 414 can form a barrier to block dirt, making it difficult for external dirt to adhere to the knife switch rod 11. When the knife switch rod 11 passes through the friction protrusions 4, the friction block 414... 4. A contact gate lever 11 extends from the friction protrusion 4. Sliding friction occurs between the friction block 414 and the gate lever 11, wiping away dust, oil, and other dirt adhering to the gate lever 11. The friction block contacts the spring 411, and the spring force of the spring 411 acts on the friction block 414, allowing the friction block 414 to obtain greater friction when in contact with the gate lever 11, resulting in better cleaning. The clamping screw 412 is located on the outside of the friction protrusion 4. A pad 413 is provided between the spring 411 and the clamping screw 412. The clamping screw 412 is located on the outside to adjust the compression of the spring 411, making it easy and convenient to adjust the spring force of the spring 411 on the friction block 414 to obtain a more suitable friction cleaning effect. The inclined placement groove 3 allows the debris generated during cleaning to fall out along the inclined direction of the placement groove 3, which is very convenient.

[0022] To further improve the design, the friction protrusion 4 is provided with a guide protrusion 42 with an inclined surface. The guide protrusion 42 guides the switch rod 11 into the placement groove 3, making the process of the switch rod 11 entering the placement groove 3 and achieving conduction simpler and more efficient.

[0023] To further improve the design, the cavity is equipped with a limiting block 43. The limiting block 43 is used to restrict the extension of the friction block 414. When the knife lever 11 enters the placement groove 3, the process is smooth and will not be obstructed by the friction block 414. The friction block 414 is equipped with a sloping protrusion 4141. The sloping protrusion 4141 of the friction block 414 ensures that the knife lever 11 contacts the sloping surface when entering and exiting the placement groove 3, making the contact between the knife lever 11 and the friction block 414 smooth. The sloping protrusion 4141 ensures that when the knife lever 11 leaves the placement groove 3, the process is smooth and unobstructed.

[0024] Furthermore, the placement groove 3 is provided with a spring 31, which is close to the knife switch rod 11. The spring 31 is elastic; when the knife switch rod 11 enters the placement groove, the spring 31 deforms, and the elastic force generated by the spring 31 clamps the knife switch rod 11, so that the knife switch rod can be reliably placed in the placement groove 3.

[0025] To further improve the design, the friction protrusion 4 is provided with a plurality of clamping screws 412 on one side. The plurality of clamping screws 412 makes the force on the pad 413 more uniform, and the force on the pad 413 compresses the spring 411, making the compression of the spring 411 uniform, and thus making the friction received by the gate lever 11 more uniform.

[0026] To further improve the design, the movable joint 111 is provided with a limiting pad 112. The limiting pad 112 prevents the switch lever 11 from opening excessively during the opening process, allowing the switch lever 11 to be placed in the slot 3 simply and reliably.

[0027] like Figure 3 As shown, a protective cover 2 is provided on the contact seat. The protective cover 2 is movably connected to the contact seat. A return spring B22 is provided on the outer side of the connection. The setting of the return spring B22 ensures that the protective cover 2 is in the open state when the circuit is open. A trigger plate 23 extends into the stationary contact on the inner side of the connection. When the circuit breaker 11 is closed, it will press down the trigger plate 23. The protective cover 2 covers the circuit breaker 11 when the circuit breaker is closed, overcoming the elastic force of the return spring B22, thus protecting the circuit breaker 11 and making it less likely for dirt to adhere to the circuit breaker 11 when it is closed. The protective cover 2 is provided with an unfolding device 21. The unfolding device 21 includes a transmission rod 211 with an inclined surface, an action rod 212 that fits with the inclined surface, an unfolding plate 213, a drive rod 214, and a return spring A215. The drive rod 214 is movably connected to the transmission rod 211. The transmission rod 211 contacts the action rod 212. The action rod 212 is connected to the unfolding plate 213. The return spring A215 is provided on the action rod 212. When the switch lever 11 closes, it contacts and presses down the drive rod 214. The drive rod 214 pushes the transmission rod 211. The moving transmission rod 211 overcomes the elastic force of the return spring A215, causing the actuating rod 212 to move. When the actuating rod 212 moves, it drives the unfolding plate 213, which unfolds, increasing the protection range of the protective cover 2 and improving the protection effect. When the switch lever 11 opens, the unfolding device 21 will retract under the elastic force of the return spring A215.

[0028] Working principle of this utility model

[0029] When the circuit breaker is opened, the knife lever 11 leaves the knife holder 1. Guided by the guide protrusion 42, the knife lever 11 smoothly enters the placement groove 3. As the knife lever 11 enters the knife holder 1, it passes over the friction protrusion 4, causing the friction block 414 to rub against the knife lever 11. This cleans the dust, oil, and other contaminants, as well as any burnt parts. Furthermore, the knife lever 11 in the placement groove 3 is less prone to contamination, ensuring a clean and efficient electrical contact when the circuit breaker is closed next time.

[0030] When the knife bar leaves, the placement groove 3 passes through the friction protrusion 4 and rubs against the friction block 414 to clean the attached dirt. The inclined protrusion 4141 makes the process of the knife bar 11 leaving the placement groove 3 smooth, and the generated debris can fall out along the inclined angle of the placement groove without accumulating.

[0031] When the circuit breaker is closed, as the knife lever 11 closes and presses down, it will press down the trigger plate 23, causing the protective cover 2 to unfold as the knife lever 11 closes. The knife lever 11 will also press down the drive rod 214, causing the unfolding device 21 to unfold, thus giving the protective cover 2 superior protective performance. The protective cover 2 protects the knife lever 11 and prevents dirt from adhering when the knife lever 11 is closed.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-cleaning disconnector, comprising a knife block seat (1), a contact block seat, a knife block stem (11), and a stationary contact, characterized in that: The knife lever (11) is provided with a movable joint (111), the knife seat (1) includes an inclined placement groove (3), the placement groove (3) is provided with symmetrical friction protrusions (4), the friction protrusions (4) are provided with cavities, the cavities are provided with friction devices (41), the friction devices (41) include a spring (411), a clamping screw (412), a pad (413), and a friction block (414), the friction block extends from the friction protrusions (4) and is close to the centerline of the knife lever (11), the friction block is in contact with the spring (411), the clamping screw (412) is provided on the outside of the friction protrusions (4), and a pad (413) is provided between the spring (411) and the clamping screw (412).

2. The self-cleaning disconnect switch according to claim 1, characterized in that: The friction protrusion (4) is provided with a guide protrusion (42) with an inclined surface.

3. The self-cleaning disconnect switch according to claim 1, characterized in that: The cavity is provided with a limit block (43), and the friction block is provided with a sloping protrusion.

4. The self-cleaning disconnect switch according to claim 1, characterized in that: The placement slot (3) is provided with a spring (31), which is close to the knife lever (11).

5. A self-cleaning disconnect switch according to claim 1, characterized in that: The friction protrusion (4) is provided with a plurality of tight screws (412) on one side.

6. A self-cleaning disconnector according to claim 1, characterized in that: The movable joint (111) is provided with a limiting pad (112).

7. A self-cleaning disconnect switch according to claim 1, characterized in that: The contact seat is provided with a protective cover (2), which is movably connected to the contact seat. A reset spring B (22) is provided on the outside of the connection, and a trigger plate (23) extends into the contact on the inside of the connection.

8. A self-cleaning disconnect switch according to claim 7, characterized in that: The protective cover (2) is provided with an unfolding device (21). The unfolding device (21) includes a transmission rod (211) with an inclined surface, an action rod (212) that fits with the inclined surface, an unfolding plate (213), a drive rod (214), and a return spring A (215). The drive rod (214) is movably connected to the transmission rod (211). The transmission rod (211) contacts the action rod (212). The action rod (212) is connected to the unfolding plate (213). The return spring A (215) is disposed on the action rod (212).

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