Travel switch device for switch cabinet

Abstract

The utility model discloses a travel switch device for a switch cabinet, which comprises a switch cabinet body and a grounding handcart mounting cavity arranged in the switch cabinet body, a mounting seat is mounted on the inner wall of one side of the grounding handcart mounting cavity, and two long rods penetrating to the outside are symmetrically arranged in the mounting seat. The two long rods and the mounting base are jointly provided with main elastic assemblies. According to the utility model, through the arrangement of the mounting seat, the long rod, the main elastic assembly, the large-stroke extrusion connecting rod, the auxiliary elastic assembly and the stroke switch, the contact stroke of the stroke switch is increased, the grounding handcart can stably press the stroke switch, and the use reliability of the stroke switch is ensured; therefore, potential safety hazards brought to maintainers by misoperation can be prevented; and meanwhile, the whole device adopts a double-travel switch design, so that the whole device can still operate normally as long as one travel switch is not damaged, and the use reliability is further improved.

Description

Technical Field

[0001] This utility model relates to the field of switch cabinet technology, and in particular to a limit switch device for switch cabinets. Background Technology

[0002] A switchgear is a complete set of electrical equipment used in a power system for controlling, protecting, and distributing electrical energy. It typically consists of circuit breakers, disconnecting switches, load switches, operating mechanisms, instrument transformers, and various protective devices. These components work together to ensure the normal operation and safety of the power system.

[0003] Commonly available handcart-type switchgear on the market all have various types of limit switches installed inside the cabinet. Among them are limit switches that match the grounding handcart. These limit switches are usually installed on the front of the cabinet of the grounding handcart. When the grounding handcart is in the working position, it is in contact with the limit switch; when the grounding handcart is in the test position, it is disengaged from the limit switch. However, the contact travel of existing limit switches is generally less than 5mm, while the travel of the grounding handcart from the test position to the working position is about 600mm. The flatness of the guide rail matching the grounding handcart inside the cabinet, the travel error of the pushing mechanism, the installation error of the limit switch, the error of the contact surface of the grounding handcart, and the jamming caused by long-term disuse can all affect the reliability of the limit switch. If the high-voltage grounding handcart does not reach the working position and contact the limit switch or is not pressed completely, the switchgear cannot effectively perform electrical interlocking operation, which is prone to misoperation and thus poses a safety hazard to maintenance personnel. Therefore, a limit switch device for switchgear is proposed. Utility Model Content

[0004] This utility model is a limit switch device for switch cabinets proposed to overcome the shortcomings of the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a limit switch device for switch cabinet, comprising a switch cabinet body and a grounding handcart mounting cavity disposed within the switch cabinet body, wherein a mounting seat is installed on one inner wall of the grounding handcart mounting cavity, and two long rods extending to the outside are symmetrically arranged inside the mounting seat, and both long rods are mounted with a main elastic component together with the mounting seat;

[0006] Two of the two long rods are symmetrically fixedly connected to two mounting rods at one end of the outer side of the mounting base, and a large-stroke extrusion connecting rod is installed between the four mounting rods.

[0007] Two secondary elastic components are symmetrically fixedly connected to the inner wall of one side of the mounting base, and limit switches are fixedly installed on the movable ends of the two secondary elastic components.

[0008] Furthermore, each of the two main elastic components includes two limiting blocks, and the limiting blocks are fixedly connected to adjacent long rods. A main spring is fixedly connected between the two limiting blocks and the mounting base.

[0009] Furthermore, the long-stroke extrusion link includes two links, and the links are rotatably connected to two adjacent mounting rods, with a pressure block rotatably connected between the two links.

[0010] Furthermore, both of the secondary elastic components include a fixed base, and the fixed base is fixedly connected to the mounting base. The inner side of the fixed base is provided with a slider, and the slider is fixedly connected to an adjacent limit switch. A secondary spring is fixedly connected to both the slider and the fixed base.

[0011] Furthermore, a sliding rod is fixedly connected to one side of the outer surface of the slider, and the sliding rod passes through the fixed seat and is slidably connected to it. Both outer walls of the slider are in contact with the inner wall of the adjacent side of the fixed seat.

[0012] Furthermore, two mounting plates are symmetrically fixedly connected to the top and bottom of the mounting base, and the mounting plates are fixedly installed on one side of the inner wall of the grounding handcart mounting cavity.

[0013] Furthermore, both of the aforementioned long rods have elliptical cross-sections, and the long rods are slidably connected to the mounting base.

[0014] The beneficial effects of this utility model are:

[0015] In use, this utility model provides a limit switch device for switchgear. Through the installation of a mounting base, a long rod, a main elastic component, a large-stroke pressing connecting rod, a secondary elastic component, and the limit switch itself, the contact stroke of the limit switch is increased. This ensures that the grounding trolley can stably press the limit switch, guaranteeing its reliability during use and preventing potential safety hazards to maintenance personnel due to misoperation. Furthermore, the overall design employs a dual-limit switch; as long as one limit switch is not damaged, the entire device can still operate normally, further enhancing its reliability. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 : Front view of this utility model;

[0018] Figure 2 Partial perspective view of this utility model;

[0019] Figure 3 Partial sectional view of this utility model;

[0020] Figure 4 : A schematic diagram of the connection between the secondary elastic component and the limit switch of this utility model.

[0021] The attached figures are labeled as follows:

[0022] 1. Switchgear body; 2. Grounding trolley mounting cavity; 3. Mounting plate; 4. Connecting rod; 5. Pressure block; 6. Mounting seat; 7. Mounting rod; 8. Limit switch; 9. Limit block; 10. Main spring; 11. Long rod; 12. Fixed seat; 13. Secondary spring; 14. Slide rod; 15. Slider. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 4 As shown, a limit switch device for switchgear is disclosed, comprising a switchgear body 1 and a grounding trolley mounting cavity 2 disposed within the switchgear body 1. A mounting base 6 is installed on one inner wall of the grounding trolley mounting cavity 2. Two long rods 11 extending to the outside are symmetrically arranged inside the mounting base 6. The cross-section of the two long rods 11 is elliptical, and the long rods 11 are slidably connected to the mounting base 6. The mounting base 6 has a limiting function for the long rods 11, which can ensure the stability of the movement of the long rods 11 and prevent them from rotating and deviating. Both long rods 11 and the mounting base 6 are jointly mounted with a main elastic component. Both main elastic components include two limiting blocks 9, and the limiting blocks 9 are fixedly connected to the adjacent long rods 11. A main spring 10 is fixedly connected between the two limiting blocks 9 and the mounting base 6.

[0025] Two long rods 11 are symmetrically fixedly connected to two mounting rods 7 at one end of the outer side of the mounting base 6. A large-stroke extrusion connecting rod is installed between the four mounting rods 7. The large-stroke extrusion connecting rod includes two connecting rods 4, and the connecting rods 4 are rotatably connected to the two adjacent mounting rods 7. A pressure block 5 is rotatably connected between the two connecting rods 4. The connecting rods 4 are rotatably connected to the pressure block 5 and the mounting rods 7 through a pin to ensure the connection effect.

[0026] Two secondary elastic components are symmetrically fixedly connected to the inner wall of one side of the mounting base 6. Limit switches 8 are fixedly installed on the movable ends of both secondary elastic components. The two limit switches 8 are connected in parallel, so that the circuit will be connected as long as either limit switch 8 is pressed. This connection method meets the requirements of this application because the circuit will operate regardless of which limit switch 8 is pressed or both are pressed simultaneously. Both secondary elastic components include a fixed base 12, and the fixed base 12 is fixedly connected to the mounting base 6. A slider 15 is provided on the inner side of the fixed base 12, and the slider 15 is connected to the adjacent limit switch. The limit switch 8 is fixedly connected to the slider 15 and the fixed seat 12. A secondary spring 13 is fixedly connected to both the slider 15 and the fixed seat 12. The elastic energy of the secondary spring 13 is greater than that of the limit switch 8. Only after the limit switch 8 is pressed can the secondary spring 13 be fully squeezed. A sliding rod 14 is fixedly connected to one side of the outer surface of the slider 15. The sliding rod 14 passes through the fixed seat 12 and is slidably connected to it. The outer walls on both sides of the slider 15 are in contact with the inner wall of the adjacent side of the fixed seat 12. The fixed seat 12 and the sliding rod 14 cooperate to limit the movement of the slider 15, which can ensure the stability of the movement of the slider 15.

[0027] The top and bottom of the mounting base 6 are symmetrically fixedly connected to two mounting plates 3, and the mounting plates 3 are fixedly installed on one side of the inner wall of the grounding handcart mounting cavity 2. The setting of the mounting plates 3 is conducive to the installation of the mounting base 6.

[0028] Working principle: When the grounding handcart contacts and presses the pressure block 5, the pressure block 5 drives the two long rods 11 to move away from each other through the connecting rod 4 and the mounting rod 7. The long rods 11 drive the two limit blocks 9 connected to them to move, thereby pressing the main spring 10. When the limit block 9 contacts the corresponding limit switch 8, it presses the limit switch 8, and then pushes the limit switch 8 and the slider 15 to move along the fixed seat 12, pressing the auxiliary spring 13, increasing the trigger stroke of the limit switch 8, and ensuring its reliability. When the pressing is released, all components are reset under the action of the main spring 10 and the auxiliary spring 13.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A travel switch device for a switch cabinet, comprising a switch cabinet body (1) and a grounding trolley mounting cavity (2) arranged in the switch cabinet body (1), characterized in that: The side inner wall of the ground handcart mounting cavity (2) is provided with a mounting seat (6), and the inside of the mounting seat (6) is symmetrically provided with two long rods (11) penetrating to the outside, and the two long rods (11) are symmetrically fixedly connected with two mounting rods (7) at one end outside the mounting seat (6), and four mounting rods (7) are symmetrically fixedly connected with two mounting rods (7) at one end outside the mounting seat (6). The side inner wall of the ground handcart mounting cavity (2) is provided with a mounting seat (6), and the inside of the mounting seat (6) is symmetrically provided with two long rods (11) penetrating to the outside, and the two long rods (11) are symmetrically fixedly connected with two mounting rods (7) at one end outside the mounting seat (6), and four mounting rods (7) are symmetrically fixedly connected with two mounting rods (7) at one end outside the mounting seat (6). The side inner wall of the mounting seat (6) is symmetrically fixedly connected with two auxiliary elastic components, and the movable ends of the two auxiliary elastic components are fixedly provided with travel switches (8).

2. A travel switch device for a switchgear according to claim 1, characterized in that: The two main elastic components each include two limiting blocks (9) fixedly connected with adjacent long rods (11), and a main spring (10) is fixedly connected between the two limiting blocks (9) and the mounting seat (6).

3. The travel switch device for a switch cabinet according to claim 1, characterized in that: The long-stroke extrusion connecting rod includes two connecting rods (4) rotatably connected between adjacent two mounting rods (7), and a pressing block (5) is rotatably connected between the two connecting rods (4).

4. The travel switch device for a switch cabinet according to claim 1, characterized in that: The two auxiliary elastic components each include a fixed seat (12) fixedly connected between the mounting seat (6), and the inner side of the fixed seat (12) is provided with a sliding block (15) fixedly connected between adjacent travel switches (8), and the sliding block (15) and the fixed seat (12) are fixedly connected with an auxiliary spring (13).

5. A travel switch device for a switchgear according to claim 4, characterized in that: The outer surface of the sliding block (15) is fixedly connected with a sliding rod (14) penetrating through the fixed seat (12) and slidably connected with the fixed seat (12), and the two side outer walls of the sliding block (15) are attached to the adjacent inner walls of the fixed seat (12).

6. The travel switch device for a switch cabinet according to claim 1, characterized in that: The top and bottom of the mounting seat (6) are symmetrically fixedly connected with two mounting plates (3) fixedly mounted on the side inner wall of the ground handcart mounting cavity (2).

7. The travel switch device for a switch cabinet according to claim 1, characterized in that: The cross section of the long rod (11) is designed in an oval shape, and the long rod (11) is slidably connected with the mounting seat (6).

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