Circuit breaker leak detection vacuum box and leak detection equipment thereof

Abstract

The utility model discloses a circuit breaker leak detection vacuum box and leak detection equipment thereof, and belongs to the field of leak detection vacuum boxes, the circuit breaker leak detection vacuum box comprises a shell, a vacuum box body is installed in the shell, the top of the vacuum box body is rotatably connected with a sealing cover, the outer side of the sealing cover is rotatably connected with a bolt, the outer edge of the bolt is fixedly provided with an electromagnet, and the electromagnet is fixedly connected with the vacuum box body. A positioning frame is fixedly mounted on the outer wall of the vacuum box body, and an electric telescopic rod is rotationally connected to the outer wall of the vacuum box body; an electric telescopic rod is driven to drive a connecting shaft to move downwards until the bottom of a sealing cover is tightly attached to a sealing strip, and when the sealing cover moves downwards, elastic reset force of a tension spring can pull the sealing cover to move downwards, so that the sealing cover is stably buckled to the top of a vacuum box body, and the two sides of the sealing cover are positioned in cooperation with an electromagnet; the sealing performance of the interior of the vacuum box body is guaranteed when the sealing cover is closed, and the accuracy of data during leakage detection is further guaranteed.

Description

Technical Field

[0001] This application relates to the field of leak detection vacuum box technology, and in particular to a circuit breaker leak detection vacuum box and its leak detection equipment. Background Technology

[0002] The mainstream leak detection methods for pole-mounted circuit breakers on the market are the general-purpose helium mass spectrometry leak detection method and the SF6 suction gun leak detection method, which are now widely used in circuit breaker testing.

[0003] Existing vacuum boxes are not tight enough when performing leak detection on circuit breakers. During the test, a large amount of gas will accumulate inside the vacuum box, and the gas will impact the sealing cover of the vacuum box when it is fully loaded, which will cause gas leakage and affect the accuracy of the data during leak detection. Therefore, this application proposes a circuit breaker leak detection vacuum box and its leak detection equipment. Utility Model Content

[0004] In view of the shortcomings of the prior art, this utility model provides a circuit breaker leak detection vacuum box and its leak detection equipment, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0005] To achieve the above objectives, this application adopts the following technical solution: a circuit breaker leak detection vacuum box and its leak detection equipment, comprising a housing, a vacuum chamber installed inside the housing, a sealing cover rotatably connected to the top of the vacuum chamber, a pin rotatably connected to the outer side of the sealing cover, an electromagnet fixedly installed on the outer edge of the pin, a positioning frame fixedly installed on the outer wall of the vacuum chamber, an electric telescopic rod rotatably connected to the outer wall of the vacuum chamber, a connecting shaft rotatably connected to the output shaft of the electric telescopic rod, a fixing plate fixedly installed on the outer wall of the vacuum chamber, one end of a tension spring hooked to the inner wall of the fixing plate, a reinforcing plate hooked to the other end of the tension spring, a connecting plate fixedly installed on the back side of the reinforcing plate, and a pull rod fixedly installed on the outer wall of the sealing cover.

[0006] In a preferred embodiment, a sealing strip is installed on the top of the vacuum chamber, and the bottom of the sealing cover is tightly fitted with the sealing strip, which is made of rubber.

[0007] By adopting the above technical solution, the sealing of the sealing cover installed on the top of the vacuum chamber can be guaranteed, ensuring that leakage will not easily occur when the circuit breaker inside the vacuum chamber is leaked, thereby ensuring that the inside of the vacuum chamber is in a vacuum state.

[0008] In a preferred embodiment, the bottom end of the pin is inserted into the inner wall of the positioning frame, the bottom of the electromagnet is in contact with the positioning frame, and the positioning frame is made of magnetic material.

[0009] By adopting the above technical solution, the electromagnet can be stably attracted and connected to the positioning frame by magnetic attraction when the sealing cover is closed. This allows the pin to be stably inserted into the inner wall of the positioning frame, so as to stably install the sealing cover on the top of the vacuum chamber and ensure that it will not be easily opened even when there is air pressure inside.

[0010] In a preferred embodiment, the connecting shaft is fixedly connected to the outer wall of the sealing cover.

[0011] By adopting the above technical solution, the operation of the electric telescopic rod can push the connecting shaft to flip the sealing cover upward, thereby automatically exposing the feed opening at the top of the vacuum chamber, which makes it easier to pick up and place the circuit breaker inside the vacuum chamber.

[0012] In a preferred embodiment, the inner walls of the reinforcing plate and the connecting plate are provided with slots, and the tie rod is inserted into the inner wall of the slot.

[0013] By adopting the above technical solution, when the sealing cover rotates, it can pull the lever to move the reinforcing plate and connecting plate upward, thereby pulling the tension spring into an open state. When the sealing cover needs to be closed, the elastic restoring force of the tension spring can be used to pull the sealing cover downward, so that the sealing cover is stably fastened to the top of the vacuum chamber. With the help of the pin, the two sides of the sealing cover are positioned to ensure the sealing of the vacuum chamber when the sealing cover is closed.

[0014] In a preferred embodiment, the inner wall of the outer casing is rotatably connected to two protective doors, and a leak detection device body is installed inside the outer casing. The leak detection device body is connected to the interior of the vacuum chamber.

[0015] By adopting the above technical solution, the leak detection equipment body can be used to perform leak detection on the circuit breaker inside the vacuum chamber, and opening the two protective doors facilitates the inspection and maintenance of the leak detection equipment body.

[0016] The beneficial effects of this application are:

[0017] This circuit breaker leak detection vacuum box and its leak detection equipment use an electric telescopic rod to move the connecting shaft downwards until the bottom of the sealing cover is tightly fitted with the sealing strip. As the sealing cover moves downwards, the elastic restoring force of the tension spring pulls the sealing cover downwards, stably fastening the sealing cover to the top of the vacuum box. In conjunction with the electromagnet positioning the two sides of the sealing cover, the sealing cover is ensured to be airtight inside the vacuum box when closed, further ensuring the accuracy of the leak detection data.

[0018] This circuit breaker leak detection vacuum box and its leak detection equipment, by inserting the pin into the inner wall of the positioning frame when the sealing cover moves down, further brings the electromagnet into contact with the positioning frame. The electromagnet and the positioning frame can be stably attracted by magnetic force, ensuring that the sealing cover will not be easily opened when gas impacts it. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this application;

[0020] Figure 2 This is a schematic diagram of the structure from below in this application;

[0021] Figure 3 This is a schematic diagram of the internal structure of this application;

[0022] Figure 4 This is a schematic diagram of the vacuum chamber structure of this application;

[0023] Figure 5 For the purposes of this application Figure 4 Enlarged structural diagram at point A in the middle;

[0024] Figure 6 For the purposes of this application Figure 4 Enlarged structural diagram at point B.

[0025] The following are the labels in the diagram: 1. Outer shell; 2. Vacuum chamber; 3. Leak detection equipment body; 4. Protective door; 5. Sealing cover; 6. Sealing strip; 7. Pin; 8. Electromagnet; 9. Positioning frame; 10. Electric telescopic rod; 11. Connecting shaft; 12. Fixing plate; 13. Tension spring; 14. Connecting plate; 15. Pull rod; 16. Reinforcing plate; 17. Groove. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0027] Reference Figure 1-6 A circuit breaker leak detection vacuum box and its leak detection equipment include a housing 1, a vacuum chamber 2 installed inside the housing 1, a sealing cover 5 rotatably connected to the top of the vacuum chamber 2, a pin 7 rotatably connected to the outer side of the sealing cover 5, an electromagnet 8 fixedly installed on the outer edge of the pin 7, a positioning frame 9 fixedly installed on the outer wall of the vacuum chamber 2, an electric telescopic rod 10 rotatably connected to the outer wall of the vacuum chamber 2, a connecting shaft 11 rotatably connected to the output shaft of the electric telescopic rod 10, a fixing plate 12 fixedly installed on the outer wall of the vacuum chamber 2, one end of a tension spring 13 hooked to the inner wall of the fixing plate 12, a reinforcing plate 16 hooked to the other end of the tension spring 13, a connecting plate 14 fixedly installed on the back side of the reinforcing plate 16, and a pull rod 15 fixedly installed on the outer wall of the sealing cover 5.

[0028] See Figure 3 and Figure 4 A sealing strip 6 is installed on the top of the vacuum chamber 2. The bottom of the sealing cover 5 is tightly fitted with the sealing strip 6. The sealing strip 6 is made of rubber, which ensures the sealing performance of the sealing cover 5 when it is rotated and installed on the top of the vacuum chamber 2. This ensures that leakage will not easily occur when the circuit breaker inside the vacuum chamber 2 is leak-tested, and thus ensures that the inside of the vacuum chamber 2 is in a vacuum state.

[0029] See Figure 4 and Figure 6 The bottom end of the pin 7 is inserted into the inner wall of the positioning frame 9, and the bottom of the electromagnet 8 is in contact with the positioning frame 9. The positioning frame 9 is made of magnetic material, so that when the sealing cover 5 is closed, the electromagnet 8 can be stably attracted and connected to the positioning frame 9 by means of magnetic attraction. In this way, the pin 7 can be stably inserted into the inner wall of the positioning frame 9 to stably install the sealing cover 5 on the top of the vacuum chamber 2, ensuring that the sealing cover 5 will not be easily opened when there is air pressure inside.

[0030] See Figure 4 The connecting shaft 11 is fixedly connected to the outer wall of the sealing cover 5, so that the operation of the electric telescopic rod 10 can push the connecting shaft 11 to drive the sealing cover 5 to flip upward, thereby automatically exposing the feed opening at the top of the vacuum chamber 2, which makes it easier to take out and place the circuit breaker inside the vacuum chamber 2.

[0031] See Figure 4 and Figure 5 The inner walls of the reinforcing plate 16 and the connecting plate 14 are provided with slots 17. The pull rod 15 is inserted into the inner wall of the slot 17, so that when the sealing cover 5 is rotated, the pull rod 15 can be pulled to move the reinforcing plate 16 and the connecting plate 14 upward, which can then pull the tension spring 13 to the open state. When the sealing cover 5 needs to be closed, the elastic restoring force of the tension spring 13 can be used to pull the sealing cover 5 downward, so that the sealing cover 5 is stably fastened to the top of the vacuum chamber 2. With the help of the pin 7, the two sides of the sealing cover 5 are positioned to ensure the sealing of the vacuum chamber 2 when the sealing cover 5 is closed.

[0032] See Figure 1 and Figure 3 The inner wall of the outer casing 1 is rotatably connected to two protective doors 4. The inside of the outer casing 1 is equipped with a leak detection device body 3. The leak detection device body 3 is connected to the inside of the vacuum chamber 2, so that the leak detection device body 3 can be used to perform leak detection on the circuit breaker inside the vacuum chamber 2. Opening the two protective doors 4 facilitates the inspection and maintenance of the leak detection device body 3.

[0033] Working principle: First, the electric telescopic rod 10 can be driven to push the connecting shaft 11 to rotate the sealing cover 5. At the same time, the magnetism of the electromagnet 8 can be eliminated. Then, the sealing cover 5 can be pushed to rotate and enter the open state. The circuit breaker to be tested can then be placed inside the vacuum chamber 2. Then, the electric telescopic rod 10 can be driven to move the connecting shaft 11 downward, closing the sealing cover 5 to the top of the vacuum chamber 2 until the bottom of the sealing cover 5 is tightly fitted with the sealing strip 6. At the same time, the pin 7 can be inserted into the inner wall of the positioning frame 9, further contacting the electromagnet 8 with the positioning frame 9 to form a magnetic attraction. When the sealing cover 5 moves downward, the elastic restoring force of the tension spring 13 will pull the sealing cover 5 downward, stably fastening the sealing cover 5 to the top of the vacuum chamber 2. With the pin 7 positioning the two sides of the sealing cover 5, the sealing cover 5 is sealed inside the vacuum chamber 2 when closed.

[0034] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A circuit breaker leak detection vacuum box, comprising a housing (1), characterized in that, The outer shell (1) is equipped with a vacuum chamber (2). A sealing cover (5) is rotatably connected to the top of the vacuum chamber (2). A pin (7) is rotatably connected to the outer side of the sealing cover (5). An electromagnet (8) is fixedly installed on the outer edge of the pin (7). A positioning frame (9) is fixedly installed on the outer wall of the vacuum chamber (2). An electric telescopic rod (10) is rotatably connected to the outer wall of the vacuum chamber (2). A connecting shaft (11) is rotatably connected to the output shaft of the electric telescopic rod (10). A fixing plate (12) is fixedly installed on the outer wall of the vacuum chamber (2). One end of a tension spring (13) is hooked to the inner wall of the fixing plate (12). A reinforcing plate (16) is hooked to the other end of the tension spring (13). A connecting plate (14) is fixedly installed on the back side of the reinforcing plate (16). A pull rod (15) is fixedly installed on the outer wall of the sealing cover (5).

2. The circuit breaker leak detection vacuum box according to claim 1, characterized in that, The top of the vacuum chamber (2) is fitted with a sealing strip (6), and the bottom of the sealing cover (5) is tightly fitted with the sealing strip (6). The sealing strip (6) is made of rubber.

3. The circuit breaker leak detection vacuum box according to claim 1, characterized in that, The bottom end of the pin (7) is inserted into the inner wall of the positioning frame (9), the bottom of the electromagnet (8) is in contact with the positioning frame (9), and the positioning frame (9) is made of magnetic material.

4. A circuit breaker leak detection vacuum box according to claim 1, characterized in that, The connecting shaft (11) is fixedly connected to the outer wall of the sealing cover (5).

5. A circuit breaker leak detection vacuum box according to claim 1, characterized in that, The inner walls of the reinforcing plate (16) and the connecting plate (14) are provided with slots (17), and the tie rod (15) is inserted into the inner wall of the slot (17).

6. A circuit breaker leak detection vacuum box leak detection device according to any one of claims 1-5, characterized in that, The inner wall of the outer shell (1) is rotatably connected to two protective doors (4). The inside of the outer shell (1) is equipped with a leak detection device body (3). The leak detection device body (3) is connected to the inside of the vacuum chamber (2).

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