Isolation switch contact protection system
By designing a combination of protective covers and protective plates at the contacts of the disconnecting switch, the problem of ice and snow accumulation on the contacts and fingers under extreme weather conditions was solved, thus achieving reliable opening and closing of the disconnecting switch and improving its insulation strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-04-07
AI Technical Summary
Existing high-voltage AC and DC disconnect switches are prone to failure to open or close due to ice or snow accumulation on their contacts and fingers under extreme weather conditions such as low temperatures, freezing rain, and snow, which affects the safe operation of the power grid.
A contact protection system for disconnecting switches was designed, including a protective cover, a movable protective plate, and a fixed protective plate. The electric field is optimized by the protective cover, and the cooperation between the movable and fixed protective plates achieves automatic protection of the moving and stationary contacts, preventing ice and snow from affecting the opening and closing operations.
It effectively protects the moving and stationary contacts from icing and snow accumulation in extreme weather conditions, ensuring smooth opening and closing of the disconnecting switch and improving insulation strength and electric field distribution.
Smart Images
Figure CN121812403A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of isolator protection, in particular to an isolator contact protection system. BACKGROUND
[0002] As an open type outdoor power equipment, the switching operation and running of high-voltage AC and DC isolators are easily affected by the environment. In recent years, the extreme adverse weather such as low temperature, freezing rain, snow and the like frequently occurs, which seriously affects the switching operation of outdoor high-voltage AC and DC isolators and the safe running of power grid. The standards such as GB / T1985 and DL / T486 stipulate that the manufacturer should design and stipulate the ice thickness that the isolator can operate under icing condition. The recommended ice thickness is divided into three levels of 1mm, 10mm and 20mm, and some foreign users even have the demand of 30mm ice thickness.
[0003] At present, most of the isolators applied in the market do not protect the contacts and contact fingers. Such isolators can only be applied in indoor or areas without low temperature, freezing rain, condensation, snow and other extreme weather, and the application area is greatly limited. SUMMARY
[0004] The technical problem to be solved by the present application is to provide an isolator contact protection system to solve the problem that the contacts and contact fingers of high-voltage isolators cannot be switched on or off due to icing and snowing in freezing rain and snow disaster weather.
[0005] To solve the above technical problems, the technical scheme of the present application is as follows: an isolator contact protection system, the innovation point of which is that it comprises a base, a pair of parallelly distributed support insulators are arranged on the base, and a movable contact and a static contact finger matched with each other are respectively installed on the two support insulators; the movable contact is installed on the corresponding support insulator through the cooperation of a conductive rod, and is driven by the conductive rod to approach or move away from the static contact finger to realize switching on or off, the movable contact is installed at the end of the conductive rod, and a protective cover is further connected to the side end of the movable contact away from the conductive rod through the cooperation of a connecting rod; the static contact finger is installed on the corresponding support insulator through the cooperation of a contact finger mounting base, the contact finger mounting base comprises a mounting base, a pair of parallelly distributed side plates are installed on the mounting base, the static contact finger is installed on the mounting base, and a pair of movable protective plates are further connected to the top end of the side plates, and a pair of fixed protective plates are further connected to the side of the side plates away from the movable contact.
[0006] Further, one side of the connecting rod is fixedly connected with the moving contact, and the other side of the connecting rod is movably connected with the protective cover through the cooperation of the nut, a through hole for the connecting rod to pass through is further formed in the middle of the protective cover, a limiting plate located in the protective cover is further arranged on the connecting rod, the limiting plate abuts against the inner side wall of the protective cover after the connecting rod passes through the through hole on the protective cover, the nut is threadedly connected on the connecting rod and located on the outer wall of the protective cover, and the relative fixing between the connecting rod and the protective cover is realized through the cooperation of the limiting plate and the nut.
[0007] Further, the protective cover is in a semispherical shape.
[0008] Further, the connection between the movable protective plate and the side plate is that a first connecting plate is further arranged on the bottom surface of the movable protective plate, a second connecting plate is further arranged on the inner side wall of the side plate, the first connecting plate and the second connecting plate are hingedly connected through the cooperation of a hinge shaft, a reset torsion spring is sleeved on the outer side wall of the hinge shaft, one side of the reset torsion spring abuts against the bottom surface of the movable protective plate, and the other side of the reset torsion spring abuts against the inner side wall of the side plate. The connection between the fixed protective plate and the side plate is that the fixed protective plate is fixedly connected with the side plate, and a gap for the connecting rod to be inserted and move up and down is further formed between the two fixed protective plates.
[0009] Further, the outer side of the movable protective plate further has a flange structure extending out of the side plate, and the flange structure cooperates with the outer wall of the side plate to realize one-way limiting of the upward movement of the movable protective plate.
[0010] The protective system in the application can effectively protect the moving contact and the static contact finger of the isolating switch from icing and snowing under extreme weather conditions through the cooperation of the protective cover, the movable protective plate and the fixed protective plate.
[0011] The protective cover at the moving contact is in a semispherical structure, which can optimize the electric field and improve the insulation strength while protecting the moving contact.
[0012] For the protection of the static contact finger, the movable protective plate and the fixed protective plate are cooperated, which can be automatically opened and closed with the opening and closing of the isolating switch, does not affect the smooth opening and closing of the isolating switch, and can well protect the static contact finger.
[0013] The protective system in the application can well protect the moving contact and the static contact finger whether the isolating switch is in the opening and closing state or the closed state. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 FIG. 1 is a schematic view of the isolating switch contact protection system of the application.
[0015] Figure 2 is an enlarged schematic view of part A of Figure 1
[0016] Figure 3 is an enlarged schematic view of part B of Figure 1
[0017] Figure 4 is a schematic view of the closing state of the isolating switch in the present application.
[0018] Figure 5 is an enlarged schematic view of part C of Figure 4
[0019] Figure 6 is a schematic view of the connection between the movable protection plate and the side plate in the present application.
[0020] Figure 7 is a state view of the movable protection plate when the isolating switch is in the closing state in the present application.
[0021] Figure 8 is a state view of the movable protection plate when the isolating switch is in the opening state in the present application. DETAILED DESCRIPTION
[0022] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.
[0023] As shown in the isolating switch contact protection system in the present application, the system comprises Figures 1-8 a base 1, a pair of parallelly distributed support insulators 2 are arranged on the base 1, and a movable contact 3 and a static contact finger 4 that cooperate with each other are respectively installed on the two support insulators 2. The movable contact 3 is installed on the corresponding support insulator 2 through the cooperation of a conductive rod 31, and the movable contact 3 is driven by the conductive rod 31 to approach or move away from the static contact finger 4 to realize opening and closing. The movable contact 3 is installed at the end of the conductive rod 31, and a protection cover 33 is connected to the side end of the movable contact 3 away from the conductive rod 31 through the cooperation of a connecting rod 32, and the protection cover 33 is in a hemispherical shape. The protection cover 33 in a hemispherical structure at the movable contact can not only protect the movable contact 3, but also optimize the electric field, improve the electric field distribution in the area of the movable contact 3, reduce the discharge risk, and improve the insulation strength.
[0024]
[0025] One side of the connecting rod 32 is fixedly connected with the moving contact 3, and the other side of the connecting rod 32 is movably connected with the protective cover 33 through the cooperation of the nut 35. The protective cover 33 has a through hole in the middle part for the connecting rod 32 to pass through. A limiting plate 34 is arranged on the connecting rod 32 and located in the protective cover 33. After the connecting rod 32 passes through the through hole of the protective cover 33, the limiting plate 34 abuts against the inner side wall of the protective cover 33. The nut 35 is threadedly connected with the connecting rod 32 and located on the outer wall of the protective cover 33. The relative fixation between the connecting rod 32 and the protective cover 33 is realized through the cooperation of the limiting plate 34 and the nut 35.
[0026] The static contact finger 4 is installed on the corresponding post insulator 2 through the cooperation of a finger mounting seat. The finger mounting seat comprises a mounting base 41. A pair of side plates 42 are arranged on the mounting base 41 in parallel. The static contact finger 4 is installed on the mounting base 41. A pair of movable protective plates 43 are connected to the top ends of the side plates 42. A pair of fixed protective plates 48 are connected to the side of the side plates 42 away from the moving contact 3.
[0027] The connection between the movable protective plate 43 and the side plate 42 is as shown in the schematic view. Figure 6 As shown in the schematic view, a first connecting plate 44 is arranged on the bottom surface of the movable protective plate 43. A second connecting plate 45 is arranged on the inner side wall of the side plate 42. The first connecting plate 44 and the second connecting plate 45 are hingedly connected through the cooperation of a hinge shaft 46. A reset torsional spring 47 is sleeved on the outer side wall of the hinge shaft 46. One side of the reset torsional spring 47 abuts against the bottom surface of the movable protective plate 43. The other side of the reset torsional spring 47 abuts against the inner side wall of the side plate 42.
[0028] The movable protective plate 43 has a flange structure 431 extending out of the side plate. The flange structure 431 cooperates with the outer wall of the side plate 42 to realize one-way limiting of the upward movement of the movable protective plate 43. The design of the flange structure 431 is to limit the upward movement of the movable protective plate 43 and effectively avoid the situation that the movable protective plate 43 cannot be reset after being opened.
[0029] The connection between the fixed protective plate 48 and the side plate 42 is that the fixed protective plate 48 is fixedly connected with the side plate 42. A gap is left between the two fixed protective plates 48 for the connecting rod 32 to pass through and move up and down. An inclined guide slope is arranged on the upper end of the side of the two fixed protective plates 48 adjacent to each other. The guide slopes on the two fixed protective plates 48 are in V-shaped distribution. The cooperation of the two guide slopes can guide the connecting rod 32 when the moving contact 3 is closed. The existence of the gap between the two fixed protective plates 48 is to provide a space for the movement of the connecting rod 32 and ensure that the protective cover 33 does not affect the closing of the disconnector when the moving contact 3 is closed.
[0030] For the protection of the static contact finger 4, the cooperation of the movable protection plate 43 and the fixed protection plate 48 can be automatically opened and closed with the opening and closing of the disconnecting switch, without affecting the smooth opening and closing of the disconnecting switch, and can achieve good protection for the static contact finger 4.
[0031] The disconnecting switch contact protection system in the application can effectively protect the disconnecting switch moving contact 3 and the static contact finger 4 from icing and snowing under extreme weather conditions through the cooperation of the protection cover 33, the movable protection plate 43 and the fixed protection plate 48.
[0032] The above is only a preferred embodiment of the application, and does not limit the application in any form. Although the application has been disclosed as above with a preferred embodiment, it is not intended to limit the application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the application. Any modification, change and modification of the above embodiments according to the technical essence of the application are still within the scope of the technical solution of the application.
Claims
1. A contact protection system for disconnecting switches, characterized in that: include A base, on which a pair of parallel post insulators are installed, and on the two post insulators are respectively a moving contact and a stationary contact finger that cooperate with each other; The moving contact is installed on the corresponding post insulator through the cooperation of a conductive rod, and moves closer to or further away from the stationary contact finger under the action of the conductive rod to realize the opening and closing of the circuit. The moving contact is installed at the end of the conductive rod, and a protective cover is connected to the end of the moving contact away from the conductive rod through the cooperation of a connecting rod. The stationary contact finger is mounted on the corresponding post insulator through a contact finger mounting base. The contact finger mounting base includes a mounting base, on which a pair of side plates are mounted. The stationary contact finger is mounted on the mounting base. A pair of movable protective plates are also connected to the top of the side plates. A pair of fixed protective plates are also connected to the side of the side plates away from the moving contact.
2. The disconnector contact protection system according to claim 1, characterized in that: One side of the connecting rod is fixedly connected to the moving contact, and the other side of the connecting rod is movably connected to the protective cover through the engagement of a nut. A through hole is opened in the middle of the protective cover to allow the connecting rod to pass through. A limiting plate is also provided on the connecting rod and located inside the protective cover. After the connecting rod passes through the through hole on the protective cover, the limiting plate abuts against the inner wall of the protective cover. The nut is threaded onto the connecting rod and located on the outer wall of the protective cover. The relative fixation between the connecting rod and the protective cover is achieved through the joint engagement of the limiting plate and the nut.
3. The disconnector contact protection system according to claim 1, characterized in that: The protective cover is hemispherical in shape.
4. The disconnector contact protection system according to claim 1, characterized in that: The connection between the movable protective plate and the side plate is as follows: a first connecting plate is provided on the bottom surface of the movable protective plate, and a second connecting plate is provided on the inner side wall of the side plate. The first connecting plate and the second connecting plate are hinged by a hinge shaft. A return torsion spring is fitted on the outer side wall of the hinge shaft, and one side of the return torsion spring abuts against the bottom surface of the movable protective plate, and the other side abuts against the inner side wall of the side plate. The connection between the fixed protective plate and the side plate is as follows: the fixed protective plate and the side plate are fixedly connected, and a gap is left between the two fixed protective plates to allow the connecting rod to be inserted and move up and down.
5. The disconnector contact protection system according to claim 4, characterized in that: The outer side of the movable protective plate also has a flange structure that extends out of the side plate, and the flange structure cooperates with the outer wall of the side plate to achieve a one-way limit on the upward movement of the movable protective plate.