Primary and secondary fusion pole-mounted vacuum circuit breaker

Abstract

The utility model discloses a primary and secondary fusion pole-mounted vacuum circuit breaker, which comprises a base, a vacuum circuit breaker body is fixed above the base, an insulating cylinder is sleeved on the outer wall of the vacuum circuit breaker body, a fixing frame is fixed on one side of the insulating cylinder, a current transformer is mounted in the fixing frame, and a secondary current transformer is mounted in the fixing frame. One end of the current transformer is connected with an isolation knife rest; according to the utility model, the water baffle and the V-shaped elastic sheet are arranged, so that the water baffle can be tightly pressed above the top block, the water baffle protects the joint of the isolation knife rest of the vacuum circuit breaker on the primary and secondary fusion column and the current transformer, and the water baffle can be manually lifted upwards, thereby facilitating maintenance of the joint of the isolation knife rest and the current transformer; by arranging the dehumidification structure, one end of the isolation knife rest is kept dry, condensation or water vapor is evaporated through hot air, the primary and secondary fusion column vacuum circuit breaker works more stably, and the abnormal discharge phenomenon is not likely to occur.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, in particular to a primary-secondary fusion column mounted vacuum circuit breaker. Background Art

[0002] The integrated primary and secondary circuit breaker equipment is used for the segmentation and communication functions of the 10kv distribution network trunk line. It is a pole-mounted circuit breaker equipment that integrates industry-leading electronic voltage sensors, electronic current sensors, electric energy metering modules, high-speed fault transient recording and other advanced technologies. This complete set of equipment can realize the "adaptive comprehensive local automation" function without relying on the distribution automation master station and communication. Through short-circuit / grounding fault detection technology, no-pressure disconnection, fault path adaptive delay power closing and other control logic, adaptive multi-branch multi-connection distribution network structure, it can realize the local line selection, regional positioning and isolation of single-phase grounding faults, and realize the isolation of fault areas and the restoration of power supply to non-fault areas through two reclosings. It adopts a fully sealed and fully insulated design. The circuit breaker body and the three-remote feeder terminals are sprayed with plastic to meet the anti-condensation requirements; all aviation connectors are military-grade accessories, and the cables and aviation plugs are fully sealed, with a very high protection level; it has the function of calculating active power, reactive power, power factor, frequency and electric energy.

[0003] Chinese patent CN112233932A discloses a primary-secondary integrated pole-mounted vacuum circuit breaker, which includes a circuit breaker body and a bracket. The circuit breaker body includes a shell with an operating mechanism arranged inside, and the shell and the bracket are connected by a plurality of mounting bolts. When the shell and the fixing plate extend into the mounting groove, a positioning groove with an upper opening is formed between the side wall of the mounting groove and the shell. A water baffle plate for closing the opening of the positioning groove is hinged on the bracket. A stopper for positioning the water baffle plate in a state of closing the opening of the positioning groove is connected to the shell. A moving part for separating the stopper and the water baffle plate is connected to the water baffle plate.

[0004] The device sets a water baffle protection structure to prevent the mounting bolts of the bracket from rusting, thereby improving the stability of the circuit breaker body. However, when the vacuum circuit breaker is used outdoors, condensation water vapor on the isolation knife holder may cause arcing in the equipment, affecting its stability performance. Utility Model Content

[0005] The utility model aims to provide a primary and secondary fusion column mounted vacuum circuit breaker to solve the problem mentioned in the background technology that the primary and secondary fusion column vacuum circuit breaker isolation tool holder in the prior art is prone to arc reversal, which affects its stable performance.

[0006] To achieve the above object, the utility model provides the following technical solution: a primary-secondary fusion column mounted vacuum circuit breaker, comprising a base, a vacuum circuit breaker body is fixed above the base, an insulating cylinder is sleeved on the outer wall of the vacuum circuit breaker body, a fixing frame is fixed on one side of the insulating cylinder, a current transformer is installed in the fixing frame, an isolation knife holder is connected to one end of the current transformer, and a protective structure for protecting the connection between the isolation knife holder and the current transformer is arranged above the fixing frame;

[0007] The protection structure includes a bracket and a water baffle. The bracket is fixed on the top of the fixing frame by screws. A rotation clamping structure for limiting the rotation of the water baffle is arranged in the bracket. A dehumidification structure for dehumidifying one end of the isolation tool holder is arranged above the water baffle.

[0008] Preferably, the dehumidification structure includes a main air duct and a fan that supplies air to the main air duct. An arc-shaped cover is provided on the outside of the isolation knife holder. A branch air duct is fixed on the top of the arc-shaped cover. The branch air duct passes through a water baffle and is fixedly connected to the water baffle. One end of the branch air duct is connected to the inner cavity of the arc-shaped cover, and the other end of the branch air duct is connected to the main air duct.

[0009] Preferably, the dehumidification structure further comprises a heating wire, wherein the heating wire is fixed in the main air duct, and an air slot for exhausting heated air is provided on the inner wall of the arc-shaped cover.

[0010] Preferably, a plurality of the arc-shaped covers and the air distribution ducts are provided, and the plurality of the arc-shaped covers are arranged in a linear manner.

[0011] Preferably, the rotating clamping structure includes a spring sheet, which is arranged in a V shape, and the bracket is arranged in an inverted L shape. One end of the spring sheet is fixedly connected to the lower surface of the horizontal plate of the bracket, and the other end of the spring sheet is fixedly connected to the upper surface of the stop block.

[0012] Preferably, the rotating and clamping structure further comprises a rotating rod, the rotating rod is rotatably connected in the bracket, and the water baffle is fixed to the outer wall of the rotating rod.

[0013] Preferably, the rotating pressing structure further includes a top block, the exterior of the current transformer is wrapped with an insulating sleeve, the top block is fixed to the exterior of the insulating sleeve, two top blocks are provided, and the two top blocks are respectively located at both ends of the water retaining plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model provides a water baffle and a V-shaped spring piece so that the water baffle can be pressed above the top block, and the water baffle protects the connection between the isolation knife holder and the current transformer of the vacuum circuit breaker on the primary and secondary fusion column, and the water baffle can be manually flipped upwards, which is convenient for maintenance of the connection between the isolation knife holder and the current transformer; by providing a dehumidification structure, one end of the isolation knife holder is kept dry, and arcing of the isolation knife holder due to water vapor or condensation is avoided; by providing an arc cover, hot air is blown from all sides to the outside of the isolation knife holder, and the condensation or water vapor is evaporated by the hot air, so that the vacuum circuit breaker of the primary and secondary fusion column works more stably and is not prone to abnormal discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an axonometric drawing of the utility model;

[0017] Figure 2 It is a schematic diagram of the position of the rotating pressing structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the moisture removal structure of the utility model;

[0019] Figure 4 This utility model Figure 2 The enlarged view of point A in the middle;

[0020] Figure 5 It is a schematic diagram of the internal structure of the main air duct of the utility model.

[0021] In the figure: 1. base; 2. vacuum circuit breaker body; 3. insulating cylinder; 4. fixing frame; 5. current transformer; 6. isolating knife holder; 7. protective structure; 701. bracket; 702. water baffle; 8. rotating pressing structure; 9. dehumidification structure; 901. main air duct; 902. fan; 903. arc cover; 904. branch air duct; 905. heating wire; 906. air trough; 907. spring; 908. rotating rod; 909. top block; 910. insulating sleeve. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5The utility model provides a technical solution: a primary-secondary fusion column mounted vacuum circuit breaker, comprising a base 1, a vacuum circuit breaker body 2 is fixed above the base 1, an insulating tube 3 is sleeved on the outer wall of the vacuum circuit breaker body 2, a fixing frame 4 is fixed on one side of the insulating tube 3, a current transformer 5 is installed in the fixing frame 4, one end of the current transformer 5 is connected to an isolation knife frame 6, and a protective structure 7 for protecting the connection between the isolation knife frame 6 and the current transformer 5 is arranged above the fixing frame 4;

[0024] By providing the protection structure 7, it is not easy for the isolation tool holder 6 and the current transformer 5 to generate arc due to moisture, thereby improving the working stability of the vacuum circuit breaker.

[0025] The protective structure 7 includes a bracket 701 and a water baffle 702. The bracket 701 is fixed on the top of the fixing frame 4 by screws. A rotating clamping structure 8 for limiting the rotation of the water baffle 702 is arranged in the bracket 701. A dehumidification structure 9 for dehumidifying one end of the isolation tool holder 6 is arranged above the water baffle 702.

[0026] The dehumidification structure 9 includes a main air duct 901 and a fan 902 for supplying air to the main air duct 901. An arc cover 903 is provided on the outside of the isolation knife holder 6. A branch air duct 904 is fixed on the top of the arc cover 903. The branch air duct 904 passes through the water baffle 702 and is fixedly connected to the water baffle 702. One end of the branch air duct 904 is connected to the inner cavity of the arc cover 903, and the other end of the branch air duct 904 is connected to the main air duct 901.

[0027] The dehumidification structure 9 further includes a heating wire 905 , which is fixed in the main air duct 901 . The inner wall of the arc-shaped cover 903 is provided with an air slot 906 for exhausting the heated air.

[0028] Start the fan 902. After the wind enters the main air duct 901, the internal air is heated by the electric heating wire 905 and blown into the inner cavity of the arc cover 903 through the branch air duct 904, so that the hot air is discharged from the wind grooves 906 around the isolation tool holder 6 to dehumidify the connection of the isolation tool holder 6.

[0029] A plurality of arc-shaped covers 903 and air distribution ducts 904 are provided, and the arc-shaped covers 903 are arranged in a linear manner.

[0030] The rotating clamping structure 8 includes a spring piece 907, which is arranged in a V shape, and the bracket 701 is arranged in an inverted L shape. One end of the spring piece 907 is fixedly connected to the lower surface of the horizontal plate of the bracket 701, and the other end of the spring piece 907 is fixedly connected to the upper surface of the stopper.

[0031] The rotating pressing structure 8 further comprises a rotating rod 908, which is rotatably connected in the bracket 701, and the water baffle 702 is fixed to the outer wall of the rotating rod 908. By providing the rotating rod 908, the water baffle 702 can be manually rotated, and when the isolation knife holder 6 is repaired, it does not need to be removed, and maintenance is more convenient.

[0032] The rotating pressing structure 8 further includes a top block 909. The outer part of the current transformer 5 is wrapped with an insulating sleeve 910. The top block 909 is fixed to the outer part of the insulating sleeve 910. Two top blocks 909 are provided. The two top blocks 909 are respectively located at the two ends of the water baffle 702. When the water baffle 702 is pressed by the spring piece 907, the two ends of the bottom of the water baffle 702 are pressed on the top block 909. The top block 909 supports the water baffle 702 above the isolation blade holder 6 without contacting the isolation blade holder 6.

[0033] When in use, the water baffle 702 can shield the connection between the isolation knife holder 6 and the current transformer 5, reduce water infiltration and rust, and start the fan 902 at a fixed time. After the wind enters the main air duct 901, the internal air is heated by the electric heating wire 905, and blown into the inner cavity of the arc cover 903 through the branch air duct 904, so that the hot air is discharged from the wind groove 906 around the isolation knife holder 6, and the connection of the isolation knife holder 6 is dehumidified to avoid arcing due to moisture on the outside of the isolation knife holder 6, damage to the insulating sleeve 910, and accelerated damage to the vacuum circuit breaker on the primary and secondary fusion column. Compared with the traditional primary and secondary fusion column vacuum circuit breaker, this device has a dehumidification function and can extend its service life.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Primary and secondary fusion column mounted vacuum circuit breaker, characterized by: The invention comprises a base (1), a vacuum circuit breaker body (2) is fixed above the base (1), an insulating tube (3) is sleeved on the outer wall of the vacuum circuit breaker body (2), a fixing frame (4) is fixed on one side of the insulating tube (3), a current transformer (5) is installed in the fixing frame (4), one end of the current transformer (5) is connected to an isolating knife frame (6), and a protective structure (7) for protecting the connection between the isolating knife frame (6) and the current transformer (5) is arranged above the fixing frame (4); The protective structure (7) comprises a bracket (701) and a water baffle (702); the bracket (701) is fixed to the top of the fixing frame (4) by means of screws; a rotational clamping structure (8) for limiting the rotation of the water baffle (702) is arranged in the bracket (701); and a dehumidification structure (9) for dehumidifying one end of the isolation blade holder (6) is arranged above the water baffle (702).

2. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 1, characterized in that: The dehumidification structure (9) comprises a main air duct (901) and a fan (902) for supplying air to the main air duct (901); an arc-shaped cover (903) is arranged outside the isolation blade holder (6); a branch air duct (904) is fixed on the top of the arc-shaped cover (903); the branch air duct (904) passes through the water baffle (702) and is fixedly connected to the water baffle (702); one end of the branch air duct (904) is connected to the inner cavity of the arc-shaped cover (903); and the other end of the branch air duct (904) is connected to the main air duct (901).

3. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 2, characterized in that: The dehumidification structure (9) further comprises a heating wire (905), wherein the heating wire (905) is fixed in the main air duct (901), and an air slot (906) for exhausting heated air is provided on the inner wall of the arc-shaped cover (903).

4. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 3 is characterized in that: A plurality of the arc-shaped covers (903) and the air distribution pipes (904) are provided, and the plurality of arc-shaped covers (903) are arranged in a linear manner.

5. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 4 is characterized in that: The rotating pressing structure (8) comprises a spring sheet (907), the spring sheet (907) being arranged in a V shape, the bracket (701) being arranged in an inverted L shape, one end of the spring sheet (907) being fixedly connected to the lower surface of the horizontal plate of the bracket (701), and the other end of the spring sheet (907) being fixedly connected to the upper surface of the stopper.

6. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 5, characterized in that: The rotating pressing structure (8) further comprises a rotating rod (908), wherein the rotating rod (908) is rotatably connected in the bracket (701), and the water retaining plate (702) is fixed to the outer wall of the rotating rod (908).

7. The primary and secondary fusion column mounted vacuum circuit breaker according to claim 6, characterized in that: The rotating pressing structure (8) also includes a top block (909), the outside of the current transformer (5) is wrapped with an insulating sleeve (910), and the top block (909) is fixed to the outside of the insulating sleeve (910). Two top blocks (909) are provided, and the two top blocks (909) are respectively located at two ends of the water retaining plate (702).

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