Isolation switch anti-icing device

Abstract

The invention relates to an anti-icing device for an isolating switch. The anti-icing device comprises a moving contact and a static contact which are matched with each other, the pair of moving contacts is arranged on a conductive arm, and the two moving contacts are driven by the conductive arm to be close to or far away from the static contact, so that opening and closing are realized; an anti-icing assembly is further arranged on the side, provided with the moving contact, of the conductive arm, the anti-icing assembly comprises a supporting plate and a pair of anti-icing baffles, one sides of the two anti-icing baffles are hinged to the conductive arm, the two anti-icing baffles are distributed in a V shape, and the other sides of the two anti-icing baffles swing under pushing of the supporting plate. And opening or closing is realized. According to the anti-icing device, when the isolating switch is switched off, the two anti-icing baffles are folded along with opening of the moving contact to cover the moving contact, so that ice cannot be accumulated on the contact surface of the moving contact and the static contact, and when the isolating switch is switched on, the anti-icing baffles are unfolded along with folding of the moving contact, so that the moving contact is exposed to realize smooth switching on.

Description

Technical Field

[0001] The invention relates to the field of isolating switches, and in particular to an anti-icing device for isolating switches. Background Art

[0002] Isolating switch is a switching 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 in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its working principle and structure are relatively simple, but due to its large usage and high working reliability requirements, it has a great impact on the design, construction and safe operation of substations and power plants.

[0003] At present, disconnectors with clamp-type moving contacts are widely used in substations around the world. As global temperatures rise, extreme weather becomes more frequent. Conventional disconnectors with clamp-type moving contacts generally do not have the ability to break ice. Under severe freezing conditions, disconnectors will not be able to close properly due to the influence of the ice layer, causing the moving and static contacts to burn out, which in turn affects the safe operation of the entire power grid. Such disconnectors are bound to threaten the safety of substations. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an anti-icing device for an isolating switch, so as to solve the problem that a vertical telescopic isolating switch with a clamp-type moving contact cannot be fully closed in an open state after the moving contact is covered with ice.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a telescopic transport joist, the innovation of which is: comprising a movable contact and a static contact that cooperate with each other; There is a pair of moving contacts, which are mounted on a conductive arm, and the two moving contacts are driven by the conductive arm to approach or move away from the static contact, thereby realizing opening and closing. The two moving contacts are mounted at the ends of the conductive arm, and are driven by the moving contact pull rod mounted on the conductive arm to approach or move away from each other, thereby clamping or releasing the static contact. An anti-icing assembly is also provided on the side of the conductive arm where the moving contact is installed. The anti-icing assembly includes a support plate and a pair of anti-icing baffles. One side of the two anti-icing baffles are respectively hinged on the conductive arm, and the two anti-icing baffles are distributed in a V shape. The other sides of the two anti-icing baffles swing under the push of the support plate to achieve opening or closing.

[0006] Furthermore, the cooperation between the anti-icing baffle and the support plate is as follows: the two sides of the support plate are respectively connected to the anti-icing baffle through the cooperation of a pull rod, one side of the pull rod is hinged to the support plate, and the other side is hinged to the anti-icing baffle, and the support plate is synchronously driven to move by the moving contact pull rod installed on the conductive arm, thereby realizing the opening or closing of the two anti-icing baffles.

[0007] Furthermore, the hinged connection between the anti-icing baffle and the pull rod is as follows: the anti-icing baffle and the pull rod are hinged by the cooperation of a pin shaft, one side of the pin shaft is fixed to the pull rod, and the pin shaft and the pull rod are connected to form a 7-shaped or L-shaped structure, and a through hole for the pin shaft to pass through is opened on the anti-icing baffle, and the other side of the pin shaft passes through the through hole on the anti-icing baffle and is fixed by a locking pin.

[0008] Furthermore, the through holes on the anti-icing baffle are waist-shaped holes.

[0009] Furthermore, one side edge of the two anti-icing baffles adjacent to each other is an inclined hypotenuse, and the inclination direction of the hypotenuse is gradually inclined from the side where the anti-icing baffle is hinged to the conductive arm toward a direction away from the other anti-icing baffle.

[0010] The advantages of the present invention are: when the isolating switch is opened, the two anti-icing baffles of the present invention close as the moving contact opens, covering the moving contact, so that ice will not form on the contact surface between the moving contact and the static contact; when the isolating switch is closed, the anti-icing baffles open as the moving contact closes, exposing the moving contact so that it can be closed smoothly, which will not affect the smooth opening and closing of the isolating switch and can well protect the moving contact and the static contact.

[0011] The movement of the support plate is achieved by relying on the moving contact pull rod that drives the moving contact of the isolating switch itself. There is no need to equip an additional active driving part, which simplifies the structure. At the same time, it can cooperate with the moving contact to achieve synchronous movement during opening and closing. There is no need to set up additional detection switches and other components to achieve synchronous movement of the anti-icing baffle and the moving contact, and the structure is simpler.

[0012] The anti-icing device for disconnecting switches of the present invention can be applied to vertically telescopic disconnecting switches with clamp-type moving contacts, has a simple structure, reliable operation, and is convenient for adding modified stations and installing new stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the anti-icing device for the isolating switch of the present invention.

[0014] Figure 2 The figure is a schematic diagram of the installation of the anti-icing device for the isolating switch of the present invention. DETAILED DESCRIPTION

[0015] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0016] like Figure 1 , Figure 2 The illustrated isolating switch anti-icing device comprises a movable contact 7 and a stationary contact which cooperate with each other.

[0017] There is a pair of moving contacts 7, which are mounted on a conductive arm 6, and the two moving contacts 7 are driven by the conductive arm 6 to approach or move away from the static contact, thereby realizing opening and closing. The two moving contacts 7 are mounted at the ends of the conductive arm 6, and are driven by the moving contact pull rod 5 mounted on the conductive arm 6 to approach or move away from each other, thereby clamping or releasing the static contact. The structure and operation principle of the moving contact 7 and the static contact to realize opening and closing are existing conventional technologies, and will not be described in detail in this embodiment.

[0018] An anti-icing assembly is also provided on the side of the conductive arm 6 where the moving contact 7 is installed. The anti-icing assembly includes a support plate 2 and a pair of anti-icing baffles 1. One side of the two anti-icing baffles 1 is respectively hinged on the conductive arm 6, and the two anti-icing baffles 1 are distributed in a V shape. The other side of the two anti-icing baffles 1 swings under the push of the support plate 2 to achieve opening or closing.

[0019] The cooperation between the anti-icing baffle 1 and the support plate 2 is as follows: the support plate 2 is a long strip, and the two sides of the long axis direction of the support plate 2 are respectively connected to the anti-icing baffle 1 through a pull rod 3, one side of the pull rod 3 is hinged to the support plate 2, and the other side of the pull rod 3 is hinged to the anti-icing baffle 1, and the support plate 2 is synchronously driven to move by the moving contact pull rod 5 installed on the conductive arm 6, thereby realizing the opening or closing of the two anti-icing baffles 1.

[0020] The hinged connection between the anti-icing baffle 1 and the pull rod 3 is as follows: the anti-icing baffle 1 and the pull rod 3 are hinged through the cooperation of the pin shaft 4, one side of the pin shaft 4 is fixed to the pull rod 3, and the pin shaft 4 and the pull rod 3 are connected to form a 7-shaped or L-shaped structure, and a through hole for the pin shaft to pass through is opened on the anti-icing baffle 1, and the other side of the pin shaft 4 passes through the through hole on the anti-icing baffle 1 and is fixed by a locking pin.

[0021] The through hole on the anti-icing baffle 1 is a waist-shaped hole, so that the pin shaft 4 can rotate within a certain range, which is convenient for the anti-icing baffle 1 to swing, thereby protecting the moving contact.

[0022] One side edge of the two anti-icing baffles 1 adjacent to each other is an inclined hypotenuse, and the inclination direction of the hypotenuse is from the side where the anti-icing baffle 1 is hinged to the conductive arm 6 and gradually inclines away from the other anti-icing baffle 1.

[0023] Working principle: During the closing process, the moving contact rod 5 pushes the contact 7 upward and clamps it inward. At this time, the anti-icing baffle 1 moves upward, pushing the rod 3 to move upward as well. The pin shaft 4 on the rod 3 moves a certain distance in the waist-shaped hole of the anti-icing baffle 1 and then pushes the anti-icing baffle 1 apart, so that the moving contact 7 can contact the static contact and be clamped, while the anti-icing baffle 1 does not contact the static contact. When opening the switch, the moving contact rod 5 pulls the moving contact 7 downward and separates it. At this time, the anti-icing baffle 1 moves downward, pulling the rod 3 to move downward. The pin shaft 4 on the rod 3 moves a certain distance in the waist-shaped hole of the anti-icing baffle 1 and then pulls the anti-icing baffle 1 to close, thereby ensuring that the ice layer will not form on the contact surface between the moving contact 7 and the static contact when ice forms, thereby eliminating the phenomenon of ice forming on the surface of the moving contact 7.

[0024] According to the anti-icing device of the present invention, when the isolating switch is opened, the two anti-icing baffles close as the moving contact opens, covering the moving contact to prevent ice from forming on the contact surface between the moving contact and the static contact; when the isolating switch is closed, the anti-icing baffles open as the moving contact closes, exposing the moving contact to enable smooth closing, which will not affect the smooth opening and closing of the isolating switch and can well protect the moving contact and the static contact.

[0025] The anti-icing device for disconnecting switches of the present invention can be applied to vertically telescopic disconnecting switches with clamp-type moving contacts, has a simple structure, reliable operation, and is convenient for adding modified stations and installing new stations.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-icing device for an isolating switch, characterized in that: It includes moving contacts and static contacts that cooperate with each other; There is a pair of moving contacts, which are mounted on a conductive arm, and the two moving contacts are driven by the conductive arm to approach or move away from the static contact, thereby realizing opening and closing. The two moving contacts are mounted at the ends of the conductive arm, and are driven by the moving contact pull rod mounted on the conductive arm to approach or move away from each other, thereby clamping or releasing the static contact. An anti-icing assembly is also provided on the side of the conductive arm where the moving contact is installed. The anti-icing assembly includes a support plate and a pair of anti-icing baffles. One side of the two anti-icing baffles are respectively hinged on the conductive arm, and the two anti-icing baffles are distributed in a V shape. The other sides of the two anti-icing baffles swing under the push of the support plate to achieve opening or closing.

2. The anti-icing device for disconnector according to claim 1 is characterized in that: The cooperation between the anti-icing baffle and the support plate is as follows: the two sides of the support plate are respectively connected to the anti-icing baffle through the cooperation of a pull rod, one side of the pull rod is hinged to the support plate, and the other side is hinged to the anti-icing baffle, and the support plate is synchronously driven to move by the moving contact pull rod installed on the conductive arm, thereby realizing the opening or closing of the two anti-icing baffles.

3. The anti-icing device for disconnector according to claim 2 is characterized in that: The hinged connection between the anti-icing baffle and the pull rod is as follows: the anti-icing baffle and the pull rod are hinged through the cooperation of a pin shaft, one side of the pin shaft is fixed to the pull rod, and the pin shaft and the pull rod are connected to form a 7-shaped or L-shaped structure, and a through hole for the pin shaft to pass through is opened on the anti-icing baffle, and the other side of the pin shaft passes through the through hole on the anti-icing baffle and is fixed by a locking pin.

4. The anti-icing device for disconnector according to claim 1 is characterized in that: The through hole on the anti-icing baffle is a waist-shaped hole.

5. The anti-icing device for disconnector according to claim 1 is characterized in that: One side edge of the two anti-icing baffles adjacent to each other is an inclined hypotenuse, and the inclination direction of the hypotenuse is gradually inclined from the side where the anti-icing baffle is hinged to the conductive arm to the direction away from the other anti-icing baffle.

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