Low-voltage switch cabinet with limiting function

Abstract

The utility model discloses a low -voltage switchgear with limiting function, including the cabinet, the installation cavity is seted up in the cabinet, the door body is fixedly connected with the hinged joint through the opposite position of installation cavity front end, the limiting device for limiting door body is fixedly installed in the installation cavity mouth department, the limiting device includes the mounting panel, the support block, the guide block and the limiting component, the mounting panel fixed connection with the installation cavity mouth department, the guide block and support block surface are installed on the mounting panel surface respectively, just the support block is located the positive front of guide block, the guide block and support block inner movable joint limit the component, and the limiting component front end surface and door body movable contact. The above -mentioned design through limiting component, has realized the low -voltage switchgear door body opening state when effectively prevented the wind closing door phenomenon, has guaranteed the smooth operation of maintenance work, has the buffer shock attenuation function simultaneously, has improved the practicality and security of low -voltage switchgear significantly.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, specifically a low-voltage switchgear with limit function. Background Technology

[0002] Low-voltage switchgear is an electrical device mainly used in power plants, petroleum, chemical, metallurgical, textile, high-rise building and other industries for power transmission, distribution and power conversion. It is suitable for AC 50-60Hz power distribution systems with rated operating voltage up to 380V for power conversion, distribution and control of power, lighting and power distribution equipment.

[0003] However, existing low-voltage switchgear is not designed with limit devices. Operators need to keep the door open during maintenance operations. In case of strong winds, the door will close with the wind, thus affecting the operator's maintenance work. Summary of the Invention

[0004] The purpose of this utility model is to provide a low-voltage switchgear with a limit function to solve the problem mentioned in the background art that the existing low-voltage switchgear does not have a limit device in its design. When the operator needs to open the door during maintenance, the door will close with the wind when there is a strong wind, which will affect the operator's maintenance work.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-voltage switchgear with a limiting function, comprising a cabinet body, wherein an installation cavity is provided inside the cabinet body, and a door body is fixedly connected to the front end of the cabinet body at a position opposite to the installation cavity via a hinge. A limiting device for limiting the door body is fixedly installed at the opening of the installation cavity. The limiting device includes an installation plate, a support block, a guide block, and a limiting component. The installation plate is fixedly connected to the opening of the installation cavity. The surfaces of the guide block and the support block are respectively installed on the surface of the installation plate, and the support block is located directly in front of the guide block. A limiting component is movably connected inside the guide block and the support block, and the front surface of the limiting component is in movable contact with the door body.

[0006] Preferably, the guide block has a guide hole, and the support block has a sliding opening on its surface.

[0007] Preferably, the limiting component includes a movable rod, a spring, a contact component, and a limiting ring. The movable rod is movably connected to the guide hole, and the front end of the movable rod is fixedly connected to the contact component, which is movable within the sliding opening. A limiting ring is fixedly connected at the connection between the movable rod and the contact component. A spring is sleeved on the surface of the movable rod, with one end of the spring resisting the surface of the limiting ring and the other end of the spring resisting the surface of the guide block.

[0008] Preferably, the contact assembly includes a sliding plate, a contact wheel, and a nut. The sliding plate is fixedly connected to the front end surface of the movable rod, and the contact wheel is fixedly connected to the front end of the sliding plate surface, with the contact wheel surface in contact with the inner wall surface of the door.

[0009] Preferably, the sliding plate has a through hole on its surface, and a threaded rod is fixedly connected to the bottom of the contact wheel. The end of the threaded rod away from the contact wheel passes through the through hole and is connected and fixed to a nut.

[0010] Beneficial effects

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows:

[0012] This utility model features an ingenious and reasonable structural design. Through the spring-preloaded limiting component and stable guiding structure, it achieves the reliability of the low-voltage switchgear door opening state, effectively preventing the door from closing due to wind and ensuring the smooth progress of maintenance work. At the same time, it has the advantages of buffering and shock absorption, stable operation, simple installation and maintenance, and long service life, significantly improving the practicality and safety of the low-voltage switchgear. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall mating structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the limiting device structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the limiting component structure of this utility model;

[0016] Figure 4 This is an exploded structural diagram of the present invention.

[0017] The correspondence between the labels and component names in the attached figures is as follows:

[0018] 1. Cabinet body; 2. Mounting cavity; 3. Door; 4. Limiting device; 41. Mounting plate; 42. Guide block;

[0019] 43. Support block; 44. Limiting component; 421. Guide hole; 431. Sliding port; 441. Movable rod;

[0020] 442. Contact assembly; 443. Spring; 444. Limiting ring; 4421. Sliding plate; 4422. Contact wheel;

[0021] 4423. Through hole; 4424. Threaded rod; 4425. Nut. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "inner," "outer," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] like Figure 1-4 This is a schematic diagram of a low-voltage switchgear with a limiting function according to a preferred embodiment of the present invention. In this embodiment, the low-voltage switchgear with a limiting function includes a cabinet body 1. The cabinet body 1 has an internal mounting cavity 2 for installing electrical components. At the front end of the cabinet body 1, opposite to the opening of the mounting cavity 2, a door body 3 is fixedly connected by a hinge. The door body 3 can rotate around the hinge axis to achieve opening and closing. A limiting device 4 is fixedly installed at the edge of the opening of the mounting cavity 2. The core function of this limiting device 4 is to effectively limit the door body 3 in the closed state, preventing it from shaking or accidentally opening, while also providing a buffer. The limiting device 4 specifically includes: a mounting plate 41 as a base, which is firmly fixedly connected to the upper edge of the opening of the mounting cavity 2 by bolts; and a guide block 42 fixedly installed on the surface of the mounting plate 41. The guide block 42 has a through guide hole 421 inside, which is a circular or rectangular through hole used to guide the linear movement of the moving parts; the support block 43 is fixedly installed on the surface of the mounting plate 41 and is located in front of the guide block 42, closer to the door body 3. The surface of the support block 43 has a sliding opening 431, which is usually an elongated through hole or groove; the limiting component 44 is movably connected between the guide block 42 and the support block 43, and its front end directly contacts the inner wall surface of the closed door body 3 to provide a limiting force.

[0025] In this embodiment, the limiting component 44 consists of a movable rod 441, a spring 443, a contact component 442, and a limiting ring 444. The main body of the movable rod 441 has its rear end movably inserted into the guide hole 421 of the guide block 42, allowing it to slide axially back and forth within the guide hole 421. The contact component 442 is fixedly connected to the front end of the movable rod 441. The contact component 442 includes a sliding plate 4421, a contact wheel 4422, and a nut (4425). The sliding plate 4421 is a plate-like structure fixedly connected to the front end surface of the movable rod 441. The size of the sliding plate 4421 allows it to be movably embedded in the sliding opening 431 of the support block 43 and slide back and forth within it. The contact wheel 4422 is a rotatable roller used to contact the door body 3 to reduce friction. The contact wheel 4422 is mounted to the sliding plate 4421 via a threaded rod 4424 at its bottom. Specifically, a through hole 4423 is provided on the surface of the sliding plate 4421. A threaded rod 4424 extends downward from the bottom of the contact wheel 4422, passes through the through hole 4423, and is tightened at the end of the threaded rod 4424 through the through hole 4423 by a nut 4425, thus firmly fixing the contact wheel 4422 to the sliding plate 4421. By tightening the nut 4425, the height position of the contact wheel 4422 relative to the sliding plate 4421 can be finely adjusted to accommodate minor unevenness of the inner wall of the door body 3 or to adjust the contact preload. The limiting ring 444 is fixedly connected to the movable rod 441 and is located at the connection between the movable rod 441 and the sliding plate 4421. Spring 443: sleeved on the surface of the movable rod 441, located between the guide block 42 and the limiting ring 444. One end of the spring 443 resists the surface of the guide block 42 facing the door body 3, and the other end resists the surface of the limiting ring 444 facing the guide block 42. Therefore, the spring 443 is always in a compressed state, generating a preload force that pushes the limiting ring 444, along with the entire movable rod 441 and the contact assembly 442, to move towards the door body 3.

[0026] Working principle

[0027] Door closing: When the operator closes the door 3, the inner wall of the door 3 gradually approaches and eventually contacts the contact wheel 4422 at the front end of the limit assembly 44.

[0028] Contact and Limitation: As the door 3 continues to close to its final position, the inner wall of the door 3 pushes the contact wheel 4422, along with the sliding plate 4421 and the movable rod 441, to slide backward away from the door body along the guide hole 421. This causes the spring 443 fitted on the movable rod 441 to be further compressed.

[0029] Spring force: The compressed spring 443 generates a counterforce, which pushes the movable rod 441 forward through the limiting ring 444, thereby causing the contact wheel 4422 to press tightly against the inner wall surface of the closed door 3 with a constant preload. This pressure effectively limits the door 3, preventing it from shaking or accidentally opening due to vibration or airflow.

[0030] Buffering effect: The elasticity of spring 443 also serves as a buffer, absorbing some of the impact energy when the door 3 closes, reducing noise and component wear.

[0031] Door opening: When it is necessary to open door 3, the operator applies a pulling force to overcome the preload of spring 443, the inner wall of door 3 disengages from contact wheel 4422, and the movable rod 441 moves forward slightly to reset under the action of spring 443, so that door 3 can be opened smoothly.

[0032] The above description provides a more detailed explanation of the present invention in conjunction with specific embodiments. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present invention.

Claims

1. A low-voltage switchgear with limit function, comprising a cabinet (1), characterized in that: The cabinet (1) has an installation cavity (2) inside. The front end of the cabinet (1) is fixedly connected to the door (3) by a hinge at the position opposite to the installation cavity (2). A limiting device (4) for limiting the door is fixedly installed at the opening of the installation cavity (2). The limiting device (4) includes an installation plate (41), a support block (43), a guide block (42), and a limiting component (44). The installation plate (41) is fixedly connected to the opening of the installation cavity (2). The surfaces of the guide block (42) and the support block (43) are respectively installed on the surface of the installation plate (41), and the support block (43) is located directly in front of the guide block (42). The limiting component (44) is movably connected inside the guide block (42) and the support block (43), and the front surface of the limiting component (44) is in movable contact with the door (3).

2. The low-voltage switchgear with limit function according to claim 1, characterized in that: The guide block (42) has a guide hole (421) inside, and the support block (43) has a sliding opening (431) on its surface.

3. A low-voltage switchgear with limit function according to claim 1, characterized in that: The limiting component (44) includes a movable rod (441), a spring (443), a contact component (442), and a limiting ring (444). The movable rod (441) is movably connected to the guide hole (421). The front end of the movable rod (441) is fixedly connected to the contact component (442), and the contact component (442) is movable within the sliding port (431). The connection between the movable rod (441) and the contact component (442) is fixedly connected to the limiting ring (444). The surface of the movable rod (441) is fitted with a spring (443), and one end of the spring (443) resists the surface of the limiting ring (444), while the other end of the spring (443) resists the surface of the guide block (42).

4. A low-voltage switchgear with limit function according to claim 3, characterized in that: The contact assembly (442) includes a sliding plate (4421), a contact wheel (4422), and a nut (4425). The sliding plate (4421) is fixedly connected to the front end surface of the movable rod (441). The contact wheel (4422) is fixedly connected to the front end of the sliding plate (4421), and the surface of the contact wheel (4422) is in contact with the inner wall surface of the door body (3).

5. A low-voltage switchgear with limit function according to claim 4, characterized in that: The sliding plate (4421) has a through hole (4423) on its surface. The bottom of the contact wheel (4422) is fixedly connected to a threaded rod (4424). The end of the threaded rod (4424) away from the contact wheel (4422) passes through the through hole (4423) and is connected and fixed to the nut (4425).

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