Contact device of magnetic blow-out circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to a contact device of a magnetic blow-out circuit breaker, which comprises a circuit breaker bottom shell and a circuit breaker top shell arranged above the circuit breaker bottom shell, a current transformer is embedded in the top of the circuit breaker bottom shell, and an installation mechanism is arranged between the circuit breaker bottom shell and the circuit breaker top shell. The top of the circuit breaker top shell is provided with a contact push rod and an indicating lamp, and through the arrangement of the magnetic blow-out circuit breaker contact device, by utilizing the structural design in the installation mechanism, through the cooperation of a limiting column and a limiting hole, and the clamping of a supporting clamping spring, a clamping column and a clamping hole, the magnetic blow-out circuit breaker contact device can be installed conveniently. The circuit breaker top shell and the circuit breaker bottom shell are quickly mounted and dismounted, so that subsequent maintenance or component replacement is facilitated, and the maintenance time is effectively shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a contact device of a magnetic blow circuit breaker. Background Technique

[0002] The contact device of the magnetic blow circuit breaker is a device that controls the flow and disconnection of current. It uses the magnetic blow coil through which the breaking current flows to generate a magnetic blow field to extinguish the arc. This structure requires specially arranged components such as a main conductive circuit, an arc extinguishing chamber, an operating mechanism, and an insulating support.

[0003] In a currently used contact device of a magnetic blow circuit breaker, most of the installations between the bottom shell and the top shell are realized by screws. This installation method has a complex disassembly and assembly process, which is not conducive to subsequent maintenance or component replacement, and increases the maintenance time.

[0004] To sum up, the utility model solves the problems in the above background technique by designing a contact device of a magnetic blow circuit breaker. Content of the Utility Model

[0005] The purpose of the utility model is to provide a contact device of a magnetic blow circuit breaker to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A contact device of a magnetic blow circuit breaker includes a circuit breaker bottom shell and a circuit breaker top shell arranged above the circuit breaker bottom shell. A current transformer is embedded at the top of the circuit breaker bottom shell. An installation mechanism is arranged between the circuit breaker bottom shell and the circuit breaker top shell. A contact push rod and an indicator light are respectively arranged at the top of the circuit breaker top shell;

[0008] The installation mechanism includes an upper support and a lower support. The upper supports are respectively fixedly installed on the left and right sides of the circuit breaker top shell, and limit columns are fixedly arranged at the bottoms of them. Installation grooves are formed on the outer surfaces of the limit columns, and a support snap spring and a clamping post are respectively arranged inside the installation grooves. The lower supports are respectively fixedly installed at the left and right ends of the circuit breaker bottom shell, and limit holes are formed on the top surfaces of them. A clamping hole is formed on the outer surface of the lower support.

[0009] As a preferred scheme of the utility model, the contact push rod rotates with the circuit breaker top shell through a bearing, and its contact end extends into the circuit breaker top shell and contacts the moving reed.

[0010] As a preferred scheme of the utility model, the input end of the current transformer is connected to the current acquisition end of the circuit breaker bottom shell through a wire, and the current transformer is electrically connected to the indicator light through a control module.

[0011] As a preferred solution of the present utility model, the number of the upper support and the lower support is the same, and it is located directly above the lower support.

[0012] As a preferred solution of the present utility model, the cross-sectional shape of the limiting hole matches the outer surface of the limiting post, and its inner wall fits and slides with the outer surface of the limiting post.

[0013] As a preferred solution of the present utility model, the limiting posts are distributed symmetrically about the bottom surface of the top shell of the circuit breaker.

[0014] As a preferred solution of the present utility model, one end of the support spring is fixed to the inner wall of the installation groove, and the other end of it is fixed to one end of the clamping post. The other end of the clamping post extends to the outside of the limiting post, and the outer surface of the clamping post fits and engages with the inner wall of the clamping hole.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] In the present utility model, by providing a magnetic blow circuit breaker contact device, through the structural design in the installation mechanism, through the cooperation of the limiting post and the limiting hole, and the engagement of the support spring, the clamping post and the clamping hole, the rapid installation and disassembly between the top shell and the bottom shell of the circuit breaker are realized, which is beneficial to subsequent maintenance or component replacement, and effectively reduces the maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a schematic diagram of the structure of the top shell of the circuit breaker of the present utility model;

[0019] Figure 3 is a schematic diagram of the structure of the bottom shell of the circuit breaker of the present utility model.

[0020] In the figure: 1. Bottom shell of the circuit breaker; 101. Current transformer; 2. Top shell of the circuit breaker; 201. Contact push rod; 202. Indicator light; 3. Installation mechanism; 301. Upper support; 302. Lower support; 303. Limiting post; 304. Installation groove; 305. Support spring; 306. Clamping post; 307. Limiting hole; 308. Clamping hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used herein in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Embodiment, please refer to Figures 1-3 , the present utility model provides a technical solution:

[0026] A magnetic blowout circuit breaker contact device includes a circuit breaker bottom case 1 and a circuit breaker top case 2 disposed above the circuit breaker bottom case 1. A current transformer 101 is embedded at the top of the circuit breaker bottom case 1. An installation mechanism 3 is disposed between the circuit breaker bottom case 1 and the circuit breaker top case 2. A contact push rod 201 and an indicator light 202 are respectively disposed at the top of the circuit breaker top case 2;

[0027] It should be noted that the contact push rod 201 rotates with the circuit breaker top case 2 through a bearing, and its contact end extends into the circuit breaker top case 2 and contacts the moving reed;

[0028] Specifically, the input end of the current transformer 101 is connected to the current acquisition end of the circuit breaker bottom case 1 through a wire, and the current transformer 101 is electrically connected to the indicator light 202 through a control module;

[0029] In this embodiment, the current transformer 101 is provided to monitor the current flowing through the circuit breaker, which helps to detect problems such as poor contact or open circuit in a timely manner. The indicator light 202 is mainly used to cooperate with the current transformer 101. When the current suddenly drops or disappears, the indicator light 202 will emit a red light to facilitate reminding the user.

[0030] In this embodiment, please refer to Figure 1 , Figure 2 and Figure 3 , the installation mechanism 3 includes an upper support 301 and a lower support 302. The upper support 301 is respectively fixedly installed on the left and right sides of the top shell 2 of the circuit breaker, and limiting columns 303 are fixedly arranged at the bottoms thereof. Installation grooves 304 are formed on the outer surfaces of the limiting columns 303. A support snap spring 305 and a clamping post 306 are respectively arranged inside the installation grooves 304. The lower supports 302 are respectively fixedly installed at the left and right ends of the bottom shell 1 of the circuit breaker, and limiting holes 307 are formed on the top surfaces thereof. A clamping hole 308 is formed on the outer surface of the lower support 302;

[0031] Specifically, the upper support 301 is located directly above the lower support 302. The outer surface of the limiting column 303 is in fitting contact with the inner wall of the limiting hole 307. The limiting columns 303 are distributed symmetrically about the bottom surface of the top shell 2 of the circuit breaker. One end of the support snap spring 305 is fixed to the inner wall of the installation groove 304, and the other end thereof is fixed to one end of the clamping post 306. The other end of the clamping post 306 extends to the outside of the limiting column 303, and the outer surface of the clamping post 306 is in fitting clamping connection with the inner wall of the clamping hole 308;

[0032] In this implementation scheme, the setting of the limiting hole 307 is mainly used to be in fitting contact with the limiting column 303, so as to facilitate the top shell 2 of the circuit breaker to be close to the bottom shell 1 of the circuit breaker. Through the elastic support of the support snap spring 305 on the clamping post 306, the clamping post 306 is in contact with the clamping hole 308, thereby achieving the effect of quickly installing the top shell 2 and the bottom shell 1 of the circuit breaker, and at the same time facilitating subsequent disassembly, meeting the needs of the user.

[0033] The working process of the present utility model: When using a magnetic blow circuit breaker contact device, first move the top shell 2 of the circuit breaker to gradually approach the bottom shell 1 of the circuit breaker. Then, the limiting column 303 is in contact with the limiting hole 307. During this contact process, the clamping post 306 slides along the inner wall of the limiting hole 307 and squeezes the support snap spring 305. Until the clamping post 306 and the clamping hole 308 are on the same straight line, the compressed support snap spring 305 gradually expands and drives the clamping post 306 to move towards the clamping hole 308 in a fitting manner, thereby realizing the installation of the circuit breaker, and at the same time facilitating subsequent maintenance and disassembly. Finally, after ensuring that the current transformer 101 is electrically connected to the current acquisition end of the circuit breaker through a wire, the contact state of the circuit breaker can be judged. Once the current suddenly drops or disappears, it immediately indicates that the circuit breaker is in a poor contact or disconnected state. At the same time, the control module controls the indicator light 202 to emit red light, which is convenient for reminding the user and meets the use effect of the circuit breaker.

[0034] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A magnetic blow circuit breaker contact device, comprising a circuit breaker bottom shell (1) and a circuit breaker top shell (2) arranged above the circuit breaker bottom shell (1), characterized in that: A current transformer (101) is embedded in the top of the circuit breaker bottom shell (1), a mounting mechanism (3) is provided between the circuit breaker bottom shell (1) and the circuit breaker top shell (2), and a contact push rod (201) and an indicator light (202) are respectively provided on the top of the circuit breaker top shell (2); The mounting mechanism (3) comprises an upper support (301) and a lower support (302); the upper support (301) is respectively fixedly mounted on the left and right sides of the circuit breaker top shell (2), and a limiting column (303) is fixedly arranged at the bottom thereof; an outer surface of the limiting column (303) is provided with a mounting groove (304), and the interior of the mounting groove (304) is respectively provided with a supporting clamping spring (305) and a clamping column (306); the lower support (302) is respectively fixedly mounted on the left and right ends of the circuit breaker bottom shell (1), and a limiting hole (307) is arranged on the top surface thereof; and a clamping hole (308) is arranged on the outer surface of the lower support (302).

2. A magnetic blow circuit breaker contact device according to claim 1, characterized in that: The contact push rod (201) rotates with the circuit breaker top shell (2) via a bearing, and its contact end extends to the inside of the circuit breaker top shell (2) and contacts with the moving spring sheet.

3. A magnetic blow circuit breaker contact device according to claim 1, characterized in that: The input end of the current transformer (101) is connected to the current collection end of the circuit breaker bottom shell (1) via a wire, and the current transformer (101) is electrically connected to the indicator light (202) via a control module.

4. A magnetic blow circuit breaker contact device according to claim 1, characterized in that: The number of the upper supports (301) is consistent with that of the lower supports (302), and they are located directly above the lower supports (302).

5. A magnetic blow circuit breaker contact device according to claim 1, characterized in that: The cross-sectional shape of the limiting hole (307) matches the outer surface of the limiting column (303), and the inner wall thereof fits and slides with the outer surface of the limiting column (303).

6. A magnetic blow circuit breaker contact device according to claim 1, characterized in that: The limiting columns (303) are distributed in a left-right mirror image with respect to the bottom surface of the circuit breaker top shell (2).

7. A magnetic blowout circuit breaker contact device according to claim 1, characterized in that: One end of the support clamping spring (305) is fixed to the inner wall of the mounting groove (304), and the other end thereof is fixed to one end of the clamping column (306), the other end of the clamping column (306) extends to the outside of the limiting column (303), and the clamping column (306) and the outer surface are fitted and clamped with the inner wall of the clamping hole (308).

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