Molded case circuit breaker with arc protection

Abstract

The utility model discloses a molded case circuit breaker with an arc protection function. The molded case circuit breaker comprises a molded case circuit breaker main body and a driving lever which is arranged on the upper surface of the molded case circuit breaker main body and is used for controlling, a fixed protective shell is fixed on the upper surface of the molded case circuit breaker main body, a butt joint block is fixed at the left end of the front side surface of the fixed protective shell, the butt joint block is matched with a movable protective shell, the movable protective shell is arranged on the front side of the fixed protective shell, and the fixed protective shell and the movable protective shell wrap a shifting rod; connecting sliding blocks are fixed to the left side and the right side of the movable protection shell. The molded case circuit breaker with the arc protection function is not only convenient for a worker to use, but also has a protection effect on the shifting rod due to the arrangement of the fixed protection shell and the movable protection shell when the molded case circuit breaker with the arc protection function is closed, so that safety accidents caused by mistaken touch or misoperation of the worker are avoided, and meanwhile, the arc fault protector is installed and fixed, so that the safety of the worker is improved. Therefore, tool screws and the like are not needed for installation, and the installation process is simple and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of molded case circuit breakers, and particularly relates to a molded case circuit breaker with arc protection. Background Technique

[0002] A molded case circuit breaker is a power distribution product. In actual use, it is composed of a contact system, an arc extinguishing system, an operating system, etc. In the current market, molded case circuit breakers generally adopt a manual switch mechanism. For example, in the patent with the publication number "CN220796610U" and the patent name "A Molded Case Circuit Breaker",

[0003] The positioning groove is wedge-shaped, and the bottom of the positioning plate extends with a positioning portion matching the positioning groove. An inclined surface is provided inside the positioning portion. Through the shape of the positioning groove and the inclined surface of the positioning plate, the positioning plate can be easily inserted into the positioning groove and form a clamping relationship. The two sides of the positioning portion contract inward, which can better insert into the positioning groove. The positioning plate is arranged in the middle of both sides of the upper cover and the lower cover, which can better position the connection of the upper and lower covers. An upper connection hole is provided on the upper cover, and a lower connection hole corresponding to the upper connection hole is provided on the lower cover. A connection bolt is installed in the lower connection hole for connecting the upper and lower shells. The circuit breaker assembly is connected with a lever for controlling the on-off of the circuit breaker. However, the following problems still exist in the actual use of the above structure:

[0004] In the above structure, the circuit breaker assembly is connected with a lever for controlling the on-off of the circuit breaker. The lever is exposed outside. Since no protection measures are set, during the use process, the staff may accidentally touch or misoperate it, which may lead to potential safety hazards and threaten the life safety of users.

[0005] Therefore, we propose a molded case circuit breaker with arc protection, which can well solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a molded case circuit breaker with arc protection, so as to solve the problem that in the current market, the lever is exposed outside, and since no protection measures are set, during the use process, the staff may accidentally touch or misoperate it, which may lead to potential safety hazards and threaten the life safety of users as mentioned in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A molded case circuit breaker with arc protection, including a molded case circuit breaker main body and a lever for control on the upper surface of the molded case circuit breaker main body;

[0008] It further includes: a fixed protective case is fixed on the upper surface of the molded case circuit breaker body, and a docking block is fixed at the left end of the front side of the fixed protective case, and the docking block is fitted with the movable protective case. At the same time, the movable protective case is arranged on the front side of the fixed protective case, and the fixed protective case and the movable protective case enclose the operating lever;

[0009] Connecting sliders are fixed on the left and right sides of the movable protective case, and the connecting sliders are elastically slidably connected to the molded case circuit breaker body through return springs, and both ends of the return springs are fixed to the connecting sliders and the molded case circuit breaker body respectively.

[0010] Preferably, a clamping rod is arranged on the left side of the movable protective case, and the left end of the clamping rod is fixed to a pull ring.

[0011] Preferably, the clamping rod is elastically slidably connected to the movable protective case through a tension spring, and both ends of the tension spring are fixed to the movable protective case and the clamping rod respectively. At the same time, the right end of the clamping rod extends into the movable protective case to form a clamping connection with the docking block.

[0012] Preferably, an arc fault protector is arranged on the left side of the molded case circuit breaker body, and a connection hole is opened on the right side of the arc fault protector, and the connection hole is slidably connected to a connecting rod.

[0013] Preferably, the right end of the connecting rod is fixed to the molded case circuit breaker body. At the same time, there are two groups of connecting rods, and clamping blocks are arranged on the upper end surfaces of the two groups of connecting rods.

[0014] Preferably, the left side of the upper end surface of the clamping block is arranged in an inclined structure, and the clamping block is rotatably connected to the connecting rod through a connecting shaft, and a scroll spring is sleeved on the outer side of the connecting shaft.

[0015] Preferably, a limiting block is fixed on the right side of the clamping block, and the limiting block is slidably connected to the connecting rod.

[0016] Compared with the prior art, the beneficial effects of the present utility model are: this molded case circuit breaker with arc protection is not only convenient for staff to use, but also when it is closed, the fixed protective case and the movable protective case protect the operating lever, thus avoiding safety accidents caused by accidental touch or misoperation of the staff. At the same time, the arc fault protector is installed and fixed, so there is no need to use tools such as screws for installation, and the installation process is simple and convenient. The specific content is as follows:

[0017] (1) Through the arrangement of the fixed protective case and the movable protective case, it is not only convenient for staff to use, but also when it is closed, the fixed protective case and the movable protective case protect the operating lever, thus avoiding safety accidents caused by accidental touch or misoperation of the staff;

[0018] Further, when the movable protective case fits with the docking block, the clamping rod can be released at this time. Through the setting of the tension spring, the clamping rod is driven to reset, so that the right end of the clamping rod is engaged with the docking block, thereby realizing the locking between the fixed protective case and the movable protective case.

[0019] At the same time, an arc fault protector is arranged on one side of the molded case circuit breaker body. Through the setting of the arc fault protector, the arc fault in the circuit can be detected and cut off, so as to improve the safety of the electrical system.

[0020] (2) By pressing the clamping block downward, the clamping block slides into the connecting rod, so that the clamping block no longer limits the arc fault protector. At this time, the arc fault protector can be pulled to the left, so that the connection hole on the right side of the arc fault protector is separated from the connecting rod. At this time, the whole arc fault protector can be taken down for maintenance and replacement.

[0021] Furthermore, during installation, through the setting of the scroll spring, the clamping block can be driven to rotate reversely around the connecting shaft, so that the clamping block rotates to a parallel state and forms a clamping connection with the arc fault protector, thereby completing the installation and fixation of the arc fault protector, and thus eliminating the need to use tools such as screws for installation. The installation process is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the present utility model;

[0023] Figure 2 is the partial sectional view structural schematic diagram of the present utility model;

[0024] Figure 3 is the Figure 2 enlarged structural schematic diagram at A in the present utility model;

[0025] Figure 4 is the connection slider and reset spring connection bottom sectional view structural schematic diagram of the present utility model;

[0026] Figure 5 is the connection slider and reset spring connection left view structural schematic diagram of the present utility model;

[0027] Figure 6 is the Figure 5 enlarged structural schematic diagram at B in the present utility model.

[0028] In the figure: 1, molded case circuit breaker body; 2, arc fault protector; 3, connection hole; 4, connecting rod; 5, clamping block; 6, connecting shaft; 7, scroll spring; 8, limiting block; 9, fixed protective case; 10, movable protective case; 11, connection slider; 12, reset spring; 13, docking block; 14, clamping rod; 15, tension spring. Detailed implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in 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.

[0030] Please refer to Figures 1 - 6 , the present utility model provides the following technical solutions:

[0031] Embodiment 1: To solve the problem that in the prior art, the operating rod is exposed and there are no protection measures, so during use, the staff may accidentally touch or misoperate it, which may lead to potential safety hazards and threaten the life safety of the user. Therefore, the following solution is disclosed, including a molded case circuit breaker main body 1 and an operating rod for control on the upper surface of the molded case circuit breaker main body 1; further including: a fixed protection case 9 is fixed on the upper surface of the molded case circuit breaker main body 1, and a docking block 13 is fixed at the left end of the front side of the fixed protection case 9, and the docking block 13 is fitted with a movable protection case 10. At the same time, the movable protection case 10 is arranged on the front side of the fixed protection case 9, and the fixed protection case 9 and the movable protection case 10 wrap the operating rod; connecting sliders 11 are fixed on the left and right sides of the movable protection case 10, and the connecting sliders 11 are elastically slidably connected to the molded case circuit breaker main body 1 through return springs 12, and the two ends of the return spring 12 are respectively fixed to the connecting slider 11 and the molded case circuit breaker main body 1. A clamping rod 14 is arranged on the left side of the movable protection case 10, and the left end of the clamping rod 14 is fixed to a pull ring. The clamping rod 14 is elastically slidably connected to the movable protection case 10 through a tension spring 15, and the two ends of the tension spring 15 are respectively fixed to the movable protection case 10 and the clamping rod 14. At the same time, the right end of the clamping rod 14 extends into the movable protection case 10 to form a clamping connection with the docking block 13;

[0032] First, when it is necessary to use the lever on the molded case circuit breaker body 1, just pull the latch rod 14 outward, so that the right end of the latch rod 14 is separated from the docking block 13, thus releasing the limit on the docking block 13. At this time, the movable protective shell 10 can be slid forward as a whole, so that the movable protective shell 10 stably slides forward through the connecting slider 11, so that the lever on the molded case circuit breaker body 1 is exposed, which is convenient for the staff to use it. After use, just release the movable protective shell 10. At this time, through the elastic force of the return spring 12, the connecting slider 11 is driven to reset backward, so that the connecting slider 11 drives the movable protective shell 10 to reset backward together, so that the movable protective shell 10 fits with the fixed protective shell 9. At the same time, the movable protective shell 10 also fits with the docking block 13. At this time, the latch rod 14 can be released. Through the setting of the tension spring 15, the latch rod 14 is driven to reset, so that the right end of the latch rod 14 is engaged with the docking block 13, thus realizing the locking between the fixed protective shell 9 and the movable protective shell 10. This can not only prevent the movable protective shell 10 from being accidentally touched and opened by external force, but also the setting of the fixed protective shell 9 and the movable protective shell 10 plays a protective role for the lever, thus avoiding safety accidents caused by the accidental touch or misoperation of the staff;

[0033] Embodiment 2: Different from Embodiment 1, this embodiment is to detect and cut off the arc fault in the circuit to improve the safety of the electrical system. Specifically, refer to Figures 1 - 2 , an arc fault protector 2 is arranged on the left side of the molded case circuit breaker body 1, and a connection hole 3 is opened on the right side of the arc fault protector 2, and the connection hole 3 is slidably connected with the connecting rod 4. The right end of the connecting rod 4 is fixed to the molded case circuit breaker body 1. At the same time, two groups of connecting rods 4 are provided, and latch blocks 5 are arranged on the upper end surfaces of the two groups of connecting rods 4;

[0034] At the same time, an arc fault protector 2 is arranged on one side of the molded case circuit breaker body 1. Through the setting of the arc fault protector 2, the arc fault in the circuit can be detected and cut off to improve the safety of the electrical system. At the same time, when it is necessary to disassemble the arc fault protector 2, just press the latch block 5 downward, so that the latch block 5 slides into the connecting rod 4, so that the latch block 5 no longer limits the arc fault protector 2. At this time, the arc fault protector 2 can be pulled to the left, so that the connection hole 3 on the right side of the arc fault protector 2 is separated from the connecting rod 4. At this time, the whole arc fault protector 2 can be taken off for maintenance and replacement;

[0035] Embodiment 3: Different from Embodiment 2, this embodiment does not need to use tools such as screws for installation, and the installation process is simple and convenient. Specifically, refer to Figures 1 - 3, the left side of the upper end face of the clamping block 5 is arranged in an inclined structure, and the clamping block 5 is rotationally connected to the connecting rod 4 through a connecting shaft 6. A scroll spring 7 is sleeved on the outer side of the connecting shaft 6. A limiting block 8 is fixed on the right side of the clamping block 5, and a sliding connection is formed between the limiting block 8 and the connecting rod 4;

[0036] Meanwhile, when the arc fault protector 2 needs to be installed, only need to align the connection hole 3 on the right side of the arc fault protector 2 with the connecting rod 4, and then push the arc fault protector 2 to the right. As a result, the arc fault protector 2 contacts and presses the clamping block 5. Due to the inclined structure on the left side of the upper end face of the clamping block 5 and the rotational connection formed between the clamping block 5 and the connecting rod 4 through the connecting shaft 6, the clamping block 5 can rotate downward, so that the connection hole 3 can continue to move towards the connecting rod 4. When it moves to the designated position, the clamping block 5 will no longer be pressed. Subsequently, through the setting of the scroll spring 7, the clamping block 5 can be driven to rotate reversely around the connecting shaft 6. At this time, through the setting of the limiting block 8, it can be avoided that the clamping block 5 completely rotates out of the connecting rod 4, so that the clamping block 5 rotates to a parallel state and forms a clamping connection with the arc fault protector 2, thus completing the installation and fixation of the arc fault protector 2, and there is no need to use tools such as screws for installation, and the installation process is simple and convenient.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A molded case circuit breaker with arc protection, comprising a molded case circuit breaker body (1) and a lever on the upper surface of the molded case circuit breaker body (1) for control; It is characterized in that It further comprises: A fixed protection shell (9) is fixed on the upper surface of the molded case circuit breaker body (1), and a docking block (13) is fixed at the left end of the front side of the fixed protection shell (9), and the docking block (13) fits with the movable protection shell (10). At the same time, the movable protection shell (10) is arranged on the front side of the fixed protection shell (9), and the fixed protection shell (9) and the movable protection shell (10) wrap the lever; Connecting sliders (11) are fixed on the left and right sides of the movable protection shell (10), and the connecting sliders (11) are elastically slidably connected to the molded case circuit breaker body (1) through a return spring (12), and the two ends of the return spring (12) are respectively fixed to the connecting slider (11) and the molded case circuit breaker body (1).

2. The molded case circuit breaker with arc protection according to claim 1, characterized in that: A clamping rod (14) is arranged on the left side of the movable protection shell (10), and the left end of the clamping rod (14) is fixed to a pull ring.

3. The molded case circuit breaker with arc protection according to claim 2, characterized in that: The clamping rod (14) is elastically slidably connected to the movable protection shell (10) through a tension spring (15), and the two ends of the tension spring (15) are respectively fixed to the movable protection shell (10) and the clamping rod (14). At the same time, the right end of the clamping rod (14) extends into the movable protection shell (10) to form a clamping connection with the docking block (13).

4. A molded case circuit breaker with arc protection according to claim 1, characterized in that: An arc fault protector (2) is arranged on the left side of the molded case circuit breaker body (1), and a connection hole (3) is opened on the right side of the arc fault protector (2), and the connection hole (3) is slidably connected to a connecting rod (4).

5. The molded case circuit breaker with arc protection according to claim 4, characterized in that: The right end of the connecting rod (4) is fixed to the molded case circuit breaker body (1). At the same time, there are two groups of connecting rods (4), and clamping blocks (5) are arranged on the upper end surfaces of the two groups of connecting rods (4).

6. The molded case circuit breaker with arc protection according to claim 5, characterized in that: The left side of the upper end surface of the clamping block (5) is inclined, and the clamping block (5) is rotationally connected to the connecting rod (4) through a connecting shaft (6), and a scroll spring (7) is sleeved on the outer side of the connecting shaft (6).

7. An MCCB with arc protection according to claim 6, characterized in that: A limiting block (8) is fixed on the right side of the clamping block (5), and the limiting block (8) is slidably connected to the connecting rod (4).

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