High-voltage isolating switch with fully-sealed structure

Abstract

The utility model discloses a high-voltage isolating switch with a full-sealed structure, which is characterized in that through a Y-shaped insulating frame body fixedly arranged on a mounting base and an isolating knife assembly and a static contact assembly correspondingly arranged on the Y-shaped insulating frame body, the conductive part of the isolating switch is completely sealed in an insulating part, so that a conductor is prevented from being polluted by the environment, and the service life of the high-voltage isolating switch is prolonged. Especially for a rotating part and a cut-in part, conditions influencing normal operation of a circuit occur. The insulation support is of a Y-shaped structure, and the isolation knife assembly and the static contact assembly are arranged on the two branch parts of the Y-shaped insulation support at intervals, so that the problem of failure of the isolation switch caused by deformation of the base is avoided.

Description

Technical Field

[0001] The invention belongs to the field of electrical technology, and in particular relates to a high-voltage isolating switch with a fully sealed structure. Background Art

[0002] Isolating switches are suitable for installation on outdoor high-voltage power distribution equipment lines. They are mainly used in conjunction with circuit breakers or load switches to provide them with visible breaks and improve the safety of equipment operation and maintenance. When there is voltage but no load, the operating lever is used for opening and closing operations.

[0003] Normally, the disconnector terminals and blade are completely exposed to the air, which makes them susceptible to environmental influences, corrosion, and inconvenient operation. In addition, falling debris or branches overlapping the exposed conductive parts can easily cause short circuits, including frequent power outages caused by various foreign objects, affecting people's production and life; in addition, the deformation of the bracket can easily cause the two pillars of the disconnector to be misaligned, resulting in the inability to close the blade.

[0004] The invention with announcement number CN218676914U discloses a fully sealed structure disconnector, the key points of its technical solution include the overall adoption of a three-phase box structure, high-voltage bushing inlet and outlet lines, a fully sealed shell, SF6 gas filled inside, the disconnector is located in the middle of the tank body, with a horizontal fracture, and an opening and closing indicator on the outside. Grounding switch modules are optional at both ends of the tank body to achieve single and double grounding requirements, and mutual inductors, lightning arresters and other equipment can be added according to user requirements to form an open combination electrical appliance; the disconnector is equipped with an electric / manual operating mechanism to achieve opening and closing operations. Although the fully sealed structure disconnector can solve the problems of abnormal heating of the conductive part of the traditional open disconnector that is easily affected by the environment and the jamming of the transmission part, and improve the operating reliability of the disconnector, the simplicity of sealing needs to be further improved. Summary of the invention

[0005] The purpose of the present invention is to provide a high-voltage disconnector with a fully sealed structure to address the deficiencies of the above-mentioned prior art, so as to seal all the conductive parts of the disconnector inside the insulating member to avoid contamination of the conductor and to avoid deformation of the base causing the disconnector to fail to close normally.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A high-voltage disconnector with a fully sealed structure, comprising a mounting base, a Y-shaped insulating frame fixedly mounted on the mounting base, and an isolating knife assembly and a static contact assembly correspondingly mounted on the Y-shaped insulating frame; the isolating knife assembly is rotatably mounted on the left branch of the Y-shaped insulating frame and its conductive part is sealed by a sleeved insulating telescopic tube, and the static contact assembly is correspondingly mounted on the right branch of the Y-shaped insulating frame;

[0008] When the isolating knife assembly rotates to the right branch of the Y-shaped insulating frame, the isolating knife assembly is connected to the static contact assembly by snapping and is locked by a correspondingly arranged self-locking device.

[0009] The isolation knife assembly includes a conductive rod and a first conductive member fixed thereto, and the conductive rod is arranged in the insulating telescopic tube and is rotatably connected to the second conductive member on the left branch of the Y-shaped insulating frame, and a sealing insulating member is also sleeved outside the conductive rod and the first conductive member;

[0010] An insulating connecting rod is also fixedly provided at the end of the conductive rod, and a first self-locking device is installed on the insulating connecting rod.

[0011] The stationary contact assembly comprises a flat contact mounted on the outlet terminal and an insulating bracket sleeved on the outside of the flat contact, and the insulating bracket is also provided with a second self-locking device matched with the first self-locking device.

[0012] The second conductive member sealed and installed on the left branch is set as an L-shaped conductive member, one end of which is connected to the incoming terminal, and the other end is located in the insulating telescopic tube and rotatably connected to the conductive rod;

[0013] A T-shaped outlet terminal is sealed and installed on the right branch, and a flat contact is fixed on the T-shaped outlet terminal. The conductive sheets are tightened by a spring inside the flat contact and the flat contact has a self-guiding function.

[0014] The first self-locking device and the second self-locking device adopt the self-locking of a lock tongue and a lock buckle.

[0015] The first self-locking device includes a connecting plate fixed to the insulating connecting rod and a locking tongue rotatably connected to the connecting plate, and a hook hole is opened at the core of the connecting plate, and a locking hook is provided at the upper end of the locking tongue. The lower end flange of the locking tongue is located in the hook hole and, under the action of the operating rod, synchronously drives the locking hook to rotate and disengage from the second self-locking device.

[0016] When the isolating blade assembly is engaged with the stationary contact assembly, a corresponding sealing cover of the sealing insulating member is arranged on the insulating bracket.

[0017] The Y-shaped insulating frame is also provided with embedded nuts, and is fixedly connected to the mounting base through provided connecting bolts.

[0018] The beneficial effects of the present invention are:

[0019] (1) The fully sealed high-voltage disconnector has a Y-shaped insulating frame fixed on the mounting base and an isolating knife assembly and a static contact assembly correspondingly arranged on the Y-shaped insulating frame, so that all the conductive parts of the disconnector are sealed inside the insulating parts, thereby preventing the conductors from being polluted by the environment, especially the rotating parts and the cutting parts, which may affect the normal operation of the circuit; the insulating bracket adopts a Y-shaped structure, and the isolating knife assembly and the static contact assembly are arranged at intervals on the two branches of the Y-shaped insulating frame, thereby avoiding the problem of disconnector failure caused by deformation of the base.

[0020] (2) The isolating knife assembly can reduce the additional isolating knife limit assembly, reducing the overall size of the isolating knife after the switch is opened, which is more conducive to current installation and reduces production costs.

[0021] (3) The conductive part of the isolating blade assembly is sealed by an insulating telescopic tube, which solves the problem of difficulty in sealing when the isolating blade rotates; and an insulating bracket is provided on the outside of the flat contact. When the switch is closed, the corresponding sealing cover of the sealing insulating part is arranged on the insulating bracket. The two are closely matched, which improves the sealing performance of the closing part.

[0022] (4) The stationary contact assembly is set as a flat contact structure to ensure that when the isolating knife is closed, the first conductive part is in reliable contact with the flat contact, and the flat contact is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the disconnecting state of the isolating switch;

[0024] Figure 2 yes Figure 1 A cross-sectional view of

[0025] Figure 3 It is a structural diagram of the isolating switch in the closed state;

[0026] Figure 4 It is a schematic diagram of the structure of a Y-type insulating frame;

[0027] Figure 5 It is a structural schematic diagram of the isolation knife assembly;

[0028] Figure 6 is a schematic structural diagram of a first self-locking device;

[0029] Figure 7 It is a structural schematic diagram of the second self-locking device. DETAILED DESCRIPTION

[0030] The following is an explanation of the implementation of the present invention by specific specific examples, and those familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] The present invention provides a high-voltage isolating switch with a fully sealed structure, such as Figures 1 to 7 shown.

[0032] A high-voltage disconnector with a fully sealed structure comprises a mounting base 1, a Y-shaped insulating frame 2 fixedly mounted on the mounting base 1, and an isolating knife assembly 4 and a static contact assembly correspondingly arranged on the Y-shaped insulating frame 2; the isolating knife assembly 4 is rotatably arranged on the left branch of the Y-shaped insulating frame 2 and its conductive part is sealed by a sleeved insulating telescopic tube 3, and the static contact assembly 4 is correspondingly arranged on the right branch of the Y-shaped insulating frame 2.

[0033] When the isolating knife assembly 4 rotates to the right branch of the Y-shaped insulating frame 2, the isolating knife assembly 4 is connected to the static contact assembly by snapping and is locked by a correspondingly provided self-locking device.

[0034] The isolation knife assembly 4 includes a conductive rod 41 and a first conductive member 45 fixedly connected thereto, and the conductive rod 41 is arranged in the insulating telescopic tube 3 and is rotatably connected to the second conductive member 22 on the left branch of the Y-shaped insulating frame, and a sealing insulating member 42 is also sleeved on the conductive rod 41 and the first conductive member 45; an insulating connecting rod 44 is also fixedly provided at the end of the conductive rod 41, and a first self-locking device is installed on the insulating connecting rod 44.

[0035] During installation, the conductive rod 41, the first conductive member 45 and the insulating connecting rod 44 are first fixed with the connecting bolts 43, and then the sealing insulating member 42 is injection-molded on the outer side thereof by mold injection molding.

[0036] The stationary contact assembly includes a flat contact 6 mounted on the outlet terminal 24 and an insulating bracket 9 sleeved on the outside of the flat contact 6, and a fixing piece 23 is also provided on the insulating bracket 9 for installing a second self-locking device 7 that cooperates with the first self-locking device 5.

[0037] The second conductive member 22 sealedly mounted on the left branch is configured as an L-shaped conductive member, and one end of the L-shaped conductive member is connected to the incoming terminal 26, and the other end is located in the insulating telescopic tube 3 and is rotatably connected to the conductive rod 41; a T-shaped outgoing terminal 24 is sealedly mounted on the right branch, and the flat contact 6 is fixed on the T-shaped outgoing terminal 24, and each conductive sheet is tightened by a spring inside the flat contact 6 and has its own guiding function.

[0038] In this embodiment, the first self-locking device 5 and the second self-locking device 7 adopt self-locking by a lock tongue and a lock buckle, and the first self-locking device 5 includes a connecting plate 51 fixed to the insulating connecting rod 44 and a lock tongue 52 rotatably connected to the connecting plate 51, and the core of the connecting plate 51 is provided with a hook hole, and the upper end of the lock tongue is provided with a locking hook, and the lower end flange of the lock tongue 52 is located in the hook hole and synchronously drives the locking hook to rotate under the force of the insulating operating rod. When the staff applies force to the operating rod to drag the lower end flange of the lock tongue 52 backward, it will synchronously drive the locking hook on the upper end of the lock tongue fixed integrally to rotate downward, disengage from the lock buckle equipped with the second self-locking device 7, and complete the unlocking.

[0039] When the staff hooks the first self-locking device 5 with the insulating operating rod and pushes it upward obliquely, the first conductive member 45 on the isolation knife assembly 4, i.e. the moving contact, is driven to cut into the flat contact 6 of the static contact assembly to achieve the closed state, such as Figure 3 As shown, the sealing insulating member 42 and the corresponding sealing cover are arranged on the insulating bracket 9, the sealing insulating member 42 on the isolation blade assembly 4 is closely matched with the insulating bracket 9 to achieve a sealing effect, and the insulating telescopic tube 3 can be naturally bent through the umbrella skirt, and the insulating telescopic tube 3 solves the problem that the isolation blade is not easy to seal when rotating. During installation, the Y-shaped insulating frame 2 is fixed with an embedded nut 25, and is fixedly connected to the mounting base 1 through the provided bolts.

[0040] The high-voltage disconnector with a fully sealed structure has a Y-shaped insulating frame fixed on the mounting base and an isolating knife assembly and a static contact assembly correspondingly arranged on the Y-shaped insulating frame, so that all the conductive parts of the disconnector are sealed inside the insulating parts, thereby preventing the conductors from being polluted by the environment, especially the rotating parts and the cutting parts, which may affect the normal operation of the circuit; at the same time, the isolating knife assembly and the static contact assembly are arranged at intervals on the Y-shaped insulating frame, thereby preventing the disconnector from being unable to close normally due to deformation of the base.

[0041] If the words "first", "second" and the like are used in this patent to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description, and the above words have no special meaning.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the invention claimed for protection. The scope of protection claimed for the present invention is defined by the attached claims and their equivalents.

[0043] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "left", "right", "center", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the protection content of the present invention.

Claims

1. A high-voltage isolating switch with a fully sealed structure, characterized in that: It comprises a mounting base, a Y-shaped insulating frame fixed on the mounting base, and an isolating knife assembly and a static contact assembly correspondingly arranged on the Y-shaped insulating frame; the isolating knife assembly is rotatably arranged on the left branch of the Y-shaped insulating frame and its conductive part is sealed by a sleeved insulating telescopic tube, and the static contact assembly is correspondingly arranged on the right branch of the Y-shaped insulating frame; When the isolating knife assembly rotates to the right branch of the Y-shaped insulating frame, the isolating knife assembly is connected to the static contact assembly by snapping and is locked by a correspondingly arranged self-locking device.

2. A fully sealed high voltage disconnector according to claim 1, characterized in that: The isolation knife assembly includes a conductive rod and a first conductive member fixed thereto, and the conductive rod is arranged in the insulating telescopic tube and is rotatably connected to the second conductive member on the left branch of the Y-shaped insulating frame, and a sealing insulating member is also sleeved outside the conductive rod and the first conductive member; An insulating connecting rod is also fixedly provided at the end of the conductive rod, and a first self-locking device is installed on the insulating connecting rod.

3. A high-voltage isolating switch with a fully sealed structure according to claim 1, characterized in that: The stationary contact assembly comprises a flat contact mounted on the outlet terminal and an insulating bracket sleeved on the outside of the flat contact, and the insulating bracket is also provided with a second self-locking device matched with the first self-locking device.

4. A high-voltage isolating switch with a fully sealed structure according to claim 2, characterized in that: The second conductive member sealed and installed on the left branch is set as an L-shaped conductive member, one end of which is connected to the incoming terminal, and the other end is located in the insulating telescopic tube and rotatably connected to the conductive rod; A T-shaped outlet terminal is sealed and installed on the right branch, and a flat contact is fixed on the T-shaped outlet terminal. The conductive sheets are tightened by a spring inside the flat contact and the flat contact has a self-guiding function.

5. The high-voltage isolating switch with a fully sealed structure according to claim 3, characterized in that: The first self-locking device and the second self-locking device adopt the self-locking of a lock tongue and a lock buckle.

6. A high-voltage disconnector with a fully sealed structure according to claim 5, characterized in that: The first self-locking device includes a connecting plate fixed to the insulating connecting rod and a locking tongue rotatably connected to the connecting plate, and a hook hole is opened at the core of the connecting plate, and a locking hook is provided at the upper end of the locking tongue. The lower end flange of the locking tongue is located in the hook hole and, under the action of the operating rod, synchronously drives the locking hook to rotate and disengage from the second self-locking device.

7. A fully sealed high voltage disconnector according to any one of claims 1 to 6, characterized in that: When the isolating blade assembly is engaged with the static contact assembly, a corresponding sealing cover of the sealing insulating member is arranged on the insulating bracket.

8. The high-voltage disconnector with a fully sealed structure according to claim 7, characterized in that: The Y-shaped insulating frame is also provided with embedded nuts, and is fixedly connected to the mounting base through provided connecting bolts.

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