High-voltage vacuum circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a high-voltage vacuum circuit breaker which comprises an arc extinguish chamber, a mechanism box, a current transformer, an operating handle and a switch-on and switch-off indicating pointer, the operating handle and the switch-on and switch-off indicating pointer are arranged on the mechanism box, the current transformer is arranged on the arc extinguish chamber, the arc extinguish chamber is arranged on the mechanism box, and a mounting bottom plate is arranged at the bottom of the mechanism box. A plurality of mounting grooves are formed in the mounting bottom plate, mounting holes are formed in the bottoms of the mounting grooves, mounting bolts are arranged in the mounting holes, and sealing mechanisms are arranged in the mounting grooves; the shade and the mounting groove are mounted in a threaded mode, meanwhile, the flow guide ring on the shade enables the rubber suction piece on the flow guide ring to abut against the mounting bottom plate under the action of the elastic force of the spring, rainwater or dust is prevented from entering the mounting groove, rainwater and dust are prevented from entering a gap between the bolt and the mounting hole, follow-up dismounting of the mounting bolt is facilitated, and the service life of the mounting bolt is prolonged. The service life of the mounting bolt is ensured, and subsequent maintenance and disassembly of the high-voltage vacuum circuit breaker are facilitated.

Description

Technical Field

[0001] The present application relates to the field of circuit breakers, and in particular to high-voltage vacuum circuit breakers. Background Art

[0002] High-voltage vacuum circuit breakers are a type of switchgear that uses vacuum arc extinguishing technology. In layman's terms, they can automatically extinguish arcs when the circuit is disconnected to prevent sparks and maintain the safety of equipment and personnel. High-voltage vacuum circuit breakers have the characteristics of reliable operation, good arc extinguishing performance, and long service life. These advantages make high-voltage vacuum circuit breakers an important component of the power system.

[0003] Referring to the Chinese patent application with publication number CN220233025U, an outdoor high-voltage vacuum circuit breaker is disclosed. The rotating transmission component can drive two movable components to move away from each other through the adjustment component. Since the distance between the two movable components can be adjusted to different spacings and thus matched with mounting frames of different sizes, the applicability of the circuit breaker is improved. The moving circuit breaker drives the two movable components to move to two mounting holes in the mounting frame. The forward operating component is rotated, and the two movable components that are away from each other can be in close contact with the two mounting holes, so that the circuit breaker is quickly fixed on the external mounting frame.

[0004] However, in the prior art, outdoor high-voltage vacuum circuit breakers are usually installed on a mounting frame by fixing them with bolts and nuts. However, in an open-air environment, rainwater and dust may enter the gap between the bolts and the mounting holes, causing oxidation of the bolts, or the mixture of dust and rainwater may cause the gap between the bolts and the mounting holes to be firmly filled, making it inconvenient for workers to repair and disassemble the high-voltage vacuum circuit breaker. For this reason, we have designed a high-voltage vacuum circuit breaker. Utility Model Content

[0005] The high-voltage vacuum circuit breaker provided in the embodiment of the present application can cover the installation location of the high-voltage vacuum circuit breaker and the mounting frame to prevent rain and dust from entering, thereby facilitating subsequent technical issues of maintenance and disassembly of the vacuum circuit breaker.

[0006] The embodiment of the present application provides a high-voltage vacuum circuit breaker including an arc extinguishing chamber, a mechanism box, a current transformer, an operating handle and an opening and closing indicator needle arranged on the mechanism box, wherein the current transformer is arranged on the arc extinguishing chamber, the arc extinguishing chamber is arranged on the mechanism box, a mounting base plate is arranged at the bottom of the mechanism box, a plurality of mounting grooves are arranged on the mounting base plate, a mounting hole is arranged at the bottom of the mounting groove, mounting bolts are arranged in the mounting hole, a sealing mechanism is arranged in the mounting groove, and the sealing mechanism is used to seal and isolate the mounting bolts and prevent the mounting bolts from being oxidized;

[0007] The mounting base plate at the bottom of the high-voltage vacuum circuit breaker is placed on a mounting frame at the installation site, mounting bolts are placed through mounting holes in mounting grooves on the mounting base plate, and mounting bolts and mounting nuts are threadedly assembled using tools. After the vacuum circuit breaker is installed, the mounting bolts in the mounting grooves are isolated from the outside world by rotating the shield, and the air in the shield is extracted using a vacuum pump. The vacuum circuit breaker is opened and closed by pulling the operating handle. Since the same transmission mechanism is used between the operating handle, the opening and closing indicator needle and the arc extinguishing chamber, when the operating handle is pulled, the opening and closing of the conductive rod in the arc extinguishing chamber is realized, and the opening and closing indicator needle performs real-time indication.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. The present application provides an installation groove on the installation base plate below the mechanism box, and then installs the vacuum circuit breaker and the installation frame of the outdoor installation site through the installation bolts and the installation nuts, and then installs it through the cover and the installation groove thread. At the same time, the guide ring on the cover presses the rubber suction piece on the guide ring against the installation base plate under the action of the spring force to prevent rainwater or dust from entering the installation groove, thereby preventing rainwater and dust from entering the gap between the bolt and the installation hole, causing the gap between the bolt and the installation hole to be firmly filled, or causing oxidation of the bolt, which makes it inconvenient to remove the subsequent bolts, ensures the service life of the bolts, and facilitates the subsequent maintenance and disassembly of the high-voltage vacuum circuit breaker by the staff.

[0010] 2. In this application, after the mask and the mounting groove are installed, the plug of the vacuum pump is inserted into the exhaust hole to suck out the air in the mask, and then the exhaust hole is blocked with a block to isolate the mounting bolts to prevent the mounting bolts from being oxidized, thereby facilitating the subsequent removal of the mounting bolts.

[0011] In some embodiments, inner threads are provided on the side walls of the mounting groove.

[0012] In some embodiments, the sealing mechanism comprises:

[0013] A shield, wherein the bottom side wall of the shield is provided with a connecting thread matched with the internal thread on the mounting groove, and an annular groove is coaxially provided above the connecting thread;

[0014] A guide ring, one end of which is coaxially arranged in the ring groove, and the other end of which is provided with a rubber suction sheet;

[0015] A spring is arranged in the annular groove, one end of the spring is fixedly connected to the inner wall of the annular groove, and the other end of the spring is fixedly connected to the guide ring.

[0016] In some embodiments, an air extraction hole is opened on the mask, a rotating connection piece is provided above the air extraction hole, and a blocking block matching the size of the air extraction hole is provided on the rotating connection piece.

[0017] In some embodiments, the side wall cross section of the guide ring is arranged in an arc shape, and the radius of the bottom surface of the guide ring is greater than the radius of the installation groove.

[0018] In some embodiments, the same transmission mechanism is provided between the operating handle, the opening and closing indicator needle, and the arc extinguishing chamber.

[0019] In some embodiments, handles are provided on both side walls of the mechanism box along the width direction, and a plurality of lifting rings for facilitating lifting are provided on the top of the mechanism box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of the structure of a high-voltage vacuum circuit breaker provided in an embodiment of the present application;

[0022] Figure 2 A left and right isometric schematic diagram of a high-voltage vacuum circuit breaker provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the installation structure of the installation base plate and the installation bolts of the high-voltage vacuum circuit breaker provided in the embodiment of the present application;

[0024] Figure 4 A schematic diagram of a sealing mechanism of a high-voltage vacuum circuit breaker provided in an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the internal structure of the sealing mechanism of the high-voltage vacuum circuit breaker provided in an embodiment of the present application.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. Arc extinguishing chamber; 2. Mechanism box; 3. Current transformer; 4. Operating handle; 5. Opening and closing indicator needle; 6. Mounting base plate; 7. Mounting groove; 8. Mounting bolt; 9. Cover; 10. Connecting thread; 11. Spring; 12. Guide ring; 13. Rubber suction piece; 14. Exhaust hole; 15. Rotating connector; 16. Block; 17. Handle; 18. Lifting ring. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] It should be noted that, in the present application, words such as "in the present embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in the present application as "in the present embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in the present embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] High-voltage vacuum circuit breaker is a switching device that uses vacuum arc extinguishing technology. In layman's terms, it can automatically extinguish the arc when the circuit is disconnected, prevent sparks, and maintain the safety of equipment and personnel. High-voltage vacuum circuit breaker has the characteristics of reliable operation, good arc extinguishing performance, and long life.

[0036] In the outdoor high-voltage vacuum circuit breaker in the related art, the rotating transmission component can drive the two movable components to move away from each other through the adjustment component. Since the distance between the two movable components can be adjusted to different spacings and thus matched with mounting frames of different sizes, the applicability of the circuit breaker is improved. The moving circuit breaker drives the two movable components to move to the two mounting holes in the mounting frame, and the forward operating component, the two movable components moving away from each other can be in close contact with the two mounting holes, so that the circuit breaker can be quickly fixed on the external mounting frame.

[0037] Based on this, in order to improve the problem in the related technology that in an open air environment, rainwater and dust will enter the gap between the bolts and the mounting holes, causing oxidation of the bolts, or the mixture of dust and rainwater will cause the gap between the bolts and the mounting holes to be firmly filled, making it inconvenient for staff to repair and disassemble the high-voltage vacuum circuit breaker, the embodiment of the present application provides the following solution.

[0038] See also Figures 1 to 5 The high-voltage vacuum circuit breaker comprises an arc extinguishing chamber 1, a mechanism box 2, a current transformer 3, an operating handle 4 and an opening and closing indicating needle 5 arranged on the mechanism box 2, the current transformer 3 is arranged on the arc extinguishing chamber 1, the arc extinguishing chamber 1 is arranged on the mechanism box 2, a mounting base plate 6 is arranged at the bottom of the mechanism box 2, a plurality of mounting grooves 7 are opened on the mounting base plate 6, a mounting hole is opened at the bottom of the mounting groove 7, and a mounting bolt 8 is arranged in the mounting hole;

[0039] The effect of such arrangement is that, by placing the mounting base plate 6 at the bottom of the high-voltage vacuum circuit breaker on the mounting frame at the installation site, inserting the mounting bolts 8 through the mounting holes in the mounting grooves 7 on the mounting base plate 6, threading the mounting bolts 8 and the mounting nuts with tools, after the vacuum circuit breaker is installed, the mounting bolts 8 in the mounting grooves 7 are isolated from the outside world by rotating the cover 9, and then the air in the cover 9 is extracted by using a vacuum pump.

[0040] A sealing mechanism is provided in the mounting groove 7, and the sealing mechanism is used to seal and isolate the mounting bolts 8 and prevent the mounting bolts 8 from being oxidized.

[0041] See also Figure 1 and Figure 3 The sealing mechanism includes a mask 9, a guide ring 12 and a spring 11. The side wall of the mounting groove 7 is provided with an internal thread. The bottom side wall of the mask 9 is provided with a connecting thread 10 adapted to the internal thread on the mounting groove 7. An annular groove is coaxially provided above the connecting thread 10. One end of the guide ring 12 is coaxially arranged in the annular groove, and the other end is provided with a rubber suction sheet 13. The spring 11 is arranged in the annular groove, one end of the spring 11 is fixedly connected to the inner wall of the annular groove, and the other end is fixedly connected to the guide ring 12;

[0042] The effect of such arrangement is that the mask 9 and the mounting groove 7 are threadedly installed, and at the same time, the guide ring 12 on the mask 9 presses the rubber suction piece 13 on the guide ring 12 against the mounting base plate 6 under the action of the elastic force of the spring 11, thereby preventing rainwater or dust from entering the mounting groove 7, ensuring the normal service life of the mounting bolts 8, and facilitating the subsequent maintenance and disassembly of the high-voltage vacuum circuit breaker by the staff.

[0043] See also Figure 4 and Figure 5 The shield 9 is provided with an air extraction hole 14, a rotating connecting member 15 is provided above the air extraction hole 14, and a blocking block 16 matching the size of the air extraction hole 14 is provided on the rotating connecting member 15;

[0044] The effect of such arrangement is that the plug of the vacuum pump is inserted into the exhaust hole 14 to suck the air in the mask 9, and then the rotating connecting piece 15 is rotated to seal the exhaust hole 14 with the plug 16, thereby isolating the mounting bolts 8 in the mounting groove 7 to prevent the mounting bolts 8 from being oxidized by the outside world, thereby facilitating the subsequent removal of the mounting bolts 8.

[0045] See also Figure 4 and Figure 5 , the side wall cross section of the guide ring 12 is arranged in an arc shape, and the bottom radius of the guide ring 12 is greater than the radius of the mounting groove 7;

[0046] The effect of such a setting is that by setting the outer wall of the guide ring 12 to an arc shape, it plays a role in guiding rainwater, preventing rainwater from accumulating at the connection between the mounting bolt 8 and the mounting frame for a long time, thereby preventing water vapor from entering the gap between the mounting bolt 8 and the mounting hole due to evaporation.

[0047] See also Figure 1 and Figure 2 , a same transmission mechanism is provided between the operating handle 4, the opening and closing indicating needle 5 and the arc extinguishing chamber 1;

[0048] The effect of such a setting is that the vacuum circuit breaker can be opened and closed by pulling the operating handle 4, and since the same transmission mechanism is applied between the operating handle 4, the opening and closing indicator needle 5 and the arc extinguishing chamber 1, when the operating handle 4 is pulled, the opening and closing of the conductive rod in the arc extinguishing chamber 1 is realized, and the opening and closing indicator needle 5 provides real-time indication, and the operation is simple and convenient.

[0049] See also Figure 1 and Figure 2 , handles 17 are provided on both side walls of the mechanism box 2 along the width direction, and a plurality of lifting rings 18 are provided on the top of the mechanism box 2 for easy lifting;

[0050] The effect of such arrangement is that by installing the lifting device and the lifting ring 18, it is convenient to lift the vacuum circuit breaker to the required height of the installation site. At the same time, the handle 17 is convenient for the staff to move it, or provides an additional lifting point for the lifting device, which is convenient for lifting the vacuum circuit breaker.

[0051] From the above, we can see that the working principle of this application is as follows:

[0052] The vacuum circuit breaker is installed on the mounting frame of the outdoor installation site by using the mounting bolts 8 and the mounting nuts on the mounting base plate 6, and then the mounting groove 7 is threadedly installed through the shield 9. At the same time, the guide ring 12 on the shield 9 is pressed against the rubber suction piece 13 on the guide ring 12 on the mounting base plate 6 under the action of the elastic force of the spring 11 to prevent rainwater or dust from entering the mounting groove 7;

[0053] The outer wall of the guide ring 12 is arranged in an arc shape, which plays a role in guiding rainwater, preventing rainwater from accumulating at the connection between the mounting bolt 8 and the mounting frame for a long time, thereby preventing water vapor from entering the gap between the mounting bolt 8 and the mounting hole due to evaporation;

[0054] By opening an exhaust hole 14 on the mask 9 and then installing the mask 9 and the mounting groove 7, the plug of the vacuum pump is inserted into the exhaust hole 14 to suck out the air in the mask 9, and then the block 16 is used to block the exhaust hole 14 to isolate the mounting bolts 8 and prevent the mounting bolts 8 from being oxidized.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A high-voltage vacuum circuit breaker, comprising an arc extinguishing chamber (1), a mechanism box (2), a current transformer (3), an operating handle (4) and a switch-on / off indicator needle (5) arranged on the mechanism box (2), characterized in that: The current transformer (3) is arranged on an arc extinguishing chamber (1), and the arc extinguishing chamber (1) is arranged on a mechanism box (2). A mounting base plate (6) is arranged at the bottom of the mechanism box (2), and a plurality of mounting grooves (7) are provided on the mounting base plate (6). A mounting hole is arranged at the bottom of the mounting groove (7), and mounting bolts (8) are arranged in the mounting holes. A sealing mechanism is arranged in the mounting groove (7), and the sealing mechanism is used to seal and isolate the mounting bolts (8) and prevent the mounting bolts (8) from being oxidized.

2. The high voltage vacuum circuit breaker according to claim 1, characterized in that: The side wall of the installation groove (7) is provided with internal threads.

3. The high voltage vacuum circuit breaker according to claim 2, characterized in that: The sealing mechanism comprises: A shield (9), wherein a connecting thread (10) matching the internal thread of the mounting groove (7) is disposed on the bottom side wall of the shield (9), and an annular groove is coaxially disposed above the connecting thread (10); A guide ring (12), one end of which is coaxially arranged in the annular groove, and the other end of which is provided with a rubber suction sheet (13); A spring (11), wherein the spring (11) is arranged in the annular groove, one end of the spring (11) is fixedly connected to the inner wall of the annular groove, and the other end of the spring (11) is fixedly connected to the guide ring (12).

4. The high voltage vacuum circuit breaker according to claim 3, characterized in that: The mask (9) is provided with an air extraction hole (14), a rotating connection piece (15) is provided above the air extraction hole (14), and a blocking piece (16) matching the size of the air extraction hole (14) is provided on the rotating connection piece (15).

5. The high voltage vacuum circuit breaker according to claim 3, characterized in that: The side wall cross section of the guide ring (12) is arranged in an arc shape, and the radius of the bottom surface of the guide ring (12) is greater than the radius of the installation groove (7).

6. The high voltage vacuum circuit breaker according to claim 1, characterized in that: The same transmission mechanism is provided between the operating handle (4), the opening and closing indicating needle (5) and the arc extinguishing chamber (1).

7. The high voltage vacuum circuit breaker according to claim 1, characterized in that: The mechanism box (2) is provided with handles (17) on both side walls along the width direction, and the top of the mechanism box (2) is provided with a plurality of lifting rings (18) for facilitating lifting.

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