An interlocking protection structure for a metering box

Abstract

This utility model discloses an interlocking protection structure for a metering box, characterized by: a bracket installed inside the metering box and located on the side or between the main circuit breaker and the standby circuit breaker, arranged side by side; a guide rail base plate connected to the top of the bracket and located on the main circuit breaker and the standby circuit breaker; and an interlocking device slidably connected to the guide rail base plate for limiting the switching of the circuit breakers; the guide rail base plate is provided with a sliding groove for the interlocking device to slide; this utility model moves a push rod on the interlocking device, which drives a slider to slide in the sliding groove on the guide rail base plate, and drives a limit block to move. When the limit block moves to the corresponding position where the main circuit breaker or the standby circuit breaker is tripped, effective interlocking of the main circuit breaker and the standby circuit breaker is achieved, preventing both from closing simultaneously, fundamentally eliminating the safety hazards caused by simultaneous circuit breaker closing, and ensuring the safe and stable operation of the power system.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, specifically to an interlocking protection structure for a metering box. Background Technology

[0002] In power systems, metering boxes are crucial devices for electricity metering and distribution. To improve the reliability and stability of power supply, metering boxes are typically equipped with a primary circuit breaker and a backup circuit breaker. However, in actual operation, there is a risk that the primary and backup circuit breakers may close simultaneously. If both close at the same time, it may cause a short circuit in the power system, damage equipment, or even a safety accident, resulting in serious economic losses and casualties. Therefore, an interlocking protection structure for metering boxes is proposed. Utility Model Content

[0003] The purpose of this invention is to propose an interlocking protection structure for a metering box to solve the above problems.

[0004] To achieve the above objectives, the following technical solution is provided: an interlocking protection structure for a metering box, characterized in that: a bracket installed inside the metering box and located on the side or between the main circuit breaker and the standby circuit breaker installed side by side inside the metering box; a base plate connected to the top of the bracket and located on the main circuit breaker and the standby circuit breaker; and an interlocking device slidably connected to the base plate for limiting the switching of the circuit breaker; the base plate is provided with a sliding groove for the interlocking device to slide; the interlocking device includes a slider adapted to the sliding groove, a limiting block disposed at the bottom of the base plate and detachably connected to the bottom of the slider, and a push rod connected to the top of the slider.

[0005] Preferably, it also includes a limiting part disposed on one side of the limiting block.

[0006] Preferably, the slider is provided with an elastic limiting mechanism.

[0007] Preferably, the elastic limiting mechanism includes circular holes on both sides of the slider, a compression spring disposed in the circular holes, and a ball bearing connected to the compression spring.

[0008] Preferably, the sidewall of the slide is provided with a plurality of hemispherical grooves that limit the sliding of the interlocking device and are adapted to the ball bearings.

[0009] Preferably, the bracket is provided with mounting holes for connecting to the metering box.

[0010] The beneficial effects of this utility model are as follows: by pushing the push rod on the interlocking device to move, the push rod drives the slider to slide in the groove on the base plate, and drives the limit block to move. When the limit block moves to the corresponding position of the main circuit breaker or the standby circuit breaker, the main circuit breaker and the standby circuit breaker are effectively interlocked, avoiding the simultaneous closing of the two circuit breakers, fundamentally eliminating the safety hazards caused by the simultaneous closing of the circuit breakers, and ensuring the safe and stable operation of the power system.

[0011] By setting a limiting part, the interlocking effect can be further enhanced, and the stability and reliability of the interlocking structure can be improved.

[0012] By combining the elastic limiting mechanism with the hemispherical groove, when the slider slides in the groove, the ball engages with the hemispherical groove under the action of the compression spring, so that the slider can be positioned at different positions, ensuring that the interlocking device can be stably in different working states, improving the accuracy and reliability of the interlocking, and reducing the probability of failure caused by structural instability.

[0013] The bracket can be easily fixed inside the metering box through the mounting holes, thus realizing the installation of the entire interlocking protection structure. The installation process is simple and quick, and is convenient for practical application and maintenance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0015] Figure 2 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0016] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model;

[0017] Figure 4 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0018] Figure 5 This is a partial enlarged view of the present invention.

[0019] Legend: 1. Bracket; 11. Mounting hole; 2. Base plate; 21. Slide groove; 211. Hemispherical slot; 3. Interlocking device; 31. Slider; 32. Limiting block; 321. Limiting part; 33. Push rod; 34. Elastic limiting mechanism; 341. Round hole; 342. Compression spring; 343. Ball bearing. Detailed Implementation

[0020] The interlocking protection structure for a metering box described in this utility model will be further explained below with reference to the accompanying drawings.

[0021] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Participation Figure 1-4 As shown, an interlocking protection structure for a metering box is characterized by: a bracket 1 installed inside the metering box and located on the side or between the main circuit breaker and the standby circuit breaker installed side by side inside the metering box; a base plate 2 connected to the top of the bracket 1 and located on the main circuit breaker and the standby circuit breaker; and an interlocking device 3 slidably connected to the base plate 2 for limiting the switching of the circuit breaker; the base plate 2 is provided with a sliding groove 21 for the interlocking device 3 to slide; the interlocking device 3 includes a slider 31 adapted to the sliding groove 21, a limiting block 32 disposed at the bottom of the base plate 2 and detachably connected to the bottom of the slider 31, and a limit block 32 connected to the top of the slider 31. The push rod 33 is connected; when the slider 31 is in the middle position of the slide groove 21, the limit block 32 can simultaneously restrict the closing of the main circuit breaker and the standby circuit breaker; by pushing the push rod 33 on the interlocking device 3 to move, the push rod 33 drives the slider 31 to slide in the slide groove 21 on the base plate 2, and drives the limit block 32 to move. When the limit block 32 moves to the corresponding position of the main circuit breaker or the standby circuit breaker to open, the main circuit breaker and the standby circuit breaker are effectively interlocked, avoiding the simultaneous closing of the two circuit breakers, fundamentally eliminating the safety hazards caused by the simultaneous closing of the circuit breakers, and ensuring the safe and stable operation of the power system.

[0024] Participation Figure 3 As shown, it also includes a limiting part 321 disposed on one side of the limiting block 32; by setting the limiting part 321, the interlocking effect can be further increased, and the stability and reliability of the interlocking structure can be improved.

[0025] Participation Figure 1-5As shown, the slider 31 is provided with an elastic limiting mechanism 34; the elastic limiting mechanism 34 includes circular holes 341 on both sides of the slider 31, a compression spring 342 disposed in the circular holes 341, and a ball bearing 343 connected to the compression spring 342; the side wall of the slide groove 21 is provided with a plurality of hemispherical slots 211 for limiting the sliding of the interlocking device 3 and adapted to the ball bearing 343; through the cooperation of the elastic limiting mechanism 34 and the hemispherical slots 211, when the slider 31 slides in the slide groove 21, the ball bearing 343 cooperates with the hemispherical slots 211 under the action of the compression spring 342, so that the slider 31 is positioned at different positions, ensuring that the interlocking device 3 can be stably in different working states, improving the accuracy and reliability of the interlock, and reducing the probability of failure caused by structural instability.

[0026] Participation Figure 1-5 As shown, the bracket 1 is provided with mounting holes 11 for connecting to the metering box; the bracket 1 can be easily fixed in the metering box through the mounting holes 11, thereby realizing the installation of the entire interlocking protection structure. The installation process is simple and quick, and is convenient for practical application and maintenance.

[0027] Example 1: When bracket 1 is set between the main circuit breaker and the standby circuit breaker, the width of bracket 1 must be less than the distance between the main circuit breaker and the standby circuit breaker, and the length of base plate 2 must be less than the distance between the main circuit breaker and the standby circuit breaker when they are pulled. Limit block 32 can extend out of both sides of base plate 2 with slider 31 to work. Manually push push rod 33, push rod 33 drives slider 31 and limit block 32 connected to slider 31 by screws to move along slide groove 21. When limit block 32 moves to below the main circuit breaker when it is pulled, the main circuit breaker cannot be closed and energized, but the standby circuit breaker can be closed. When limit block 32 moves to below the standby circuit breaker when it is pulled, the standby circuit breaker cannot be closed and energized, but the main circuit breaker can be closed. When slider 31 moves to the middle position of slide groove 21, limit block 32 can simultaneously limit the closing of the main circuit breaker and the standby circuit breaker. This interlock protection mechanism is suitable for molded case circuit breakers, where the pull is less than the width of the circuit breaker.

[0028] Example 2: When bracket 1 is installed on the side of the main circuit breaker and the standby circuit breaker, the main circuit breaker and the standby circuit breaker can be installed together in the metering box. The limiting block 32 slides within both sides of the base plate 2, and the limiting part 321 on one side of the limiting block 32 restricts movement. When the push rod 33 is manually pushed, the push rod 33 drives the slider 31 and the limiting block 32 connected to the slider 31 by screws to move along the slide groove 21. When the limiting block 32 moves to below the main circuit breaker, the limiting part 321 on one side of the limiting block 32 restricts movement. When the main circuit breaker is closed and energized, the standby circuit breaker can be closed; when the limit block 32 is fully moved below the standby circuit breaker, the limit part 321 on one side of the limit block 32 restricts the standby circuit breaker from being energized and energized, while the main circuit breaker can be closed; when the slider 31 is fully moved to the middle position of the slide groove 21, the limit part 321 on the limit block 32 can simultaneously limit the closing of the main and standby circuit breakers and the standby circuit breaker; this interlocking protection mechanism is applicable to air circuit breakers, and the opening width is consistent with the width of the circuit breaker.

[0029] When using this utility model, firstly, the other end of the compression spring 342 connected with the ball bearing 343 is fixed to the bottom of the round hole 341 on the slider 31 by welding or mechanical connection. Then, the slider 31 with the elastic limiting device 34 installed is inserted into the slide groove 21 of the base plate 2. The push rod 33 is connected to the top of the slider 31 by thread. The limiting block 32 is installed at the bottom of the base plate 2 and connected to the bottom of the slider 31 by screws, which facilitates later maintenance and replacement. Then, the base plate 2 is fixed to the bracket 1 by welding or bolt connection. Then, the bracket 1 is fixedly installed in the metering box at a suitable position on the side of the main circuit breaker and the standby circuit breaker or between the two through the mounting hole 11 on the bracket 1. The base plate 2 is located below the circuit breaker tripping. During installation, bolts and other connecting parts are used to pass through the mounting hole 11 to firmly fix the bracket 1 to the metering box.

[0030] In actual use, when the main circuit breaker needs to be closed, the push rod 33 is pushed, causing the slider 31 to slide within the slide groove 21. During the sliding process, the ball 343 of the elastic limit mechanism 34 is positioned within the circular hole 341 under the action of the compression spring 342. When the slider 31 slides to a specific position, the ball 343, under the action of the compression spring 342, engages in the hemispherical groove 211 on the side wall of the slide groove 21, thus positioning the slider 31 at different positions. That is, the limit block 32 will block the switching of the standby circuit breaker. This prevents the main circuit breaker from closing, thus locking the standby circuit breaker when the main circuit breaker closes. Similarly, when it is necessary to close the standby circuit breaker, pushing the push rod 33 causes the slider 31 to slide to another position. At this time, the push rod 33 will block the main circuit breaker from closing, thus locking the main circuit breaker when the standby circuit breaker closes. When it is necessary to simultaneously prevent the main circuit breaker and the standby circuit breaker from closing, when the push rod 33 moves to the middle position, the limit block 32 simultaneously restricts the closing of both the main circuit breaker and the standby circuit breaker.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. An interlock protection structure for a metering box, characterized by: A bracket (1) is installed inside the metering box and located on the side of the main circuit breaker and the standby circuit breaker or between the two. A base plate (2) is connected to the top of the bracket (1) and located on the main circuit breaker and the standby circuit breaker. An interlocking device (3) is slidably connected to the base plate (2) to restrict the switching of the circuit breaker. The base plate (2) is provided with a slide groove (21) for the interlocking device (3) to slide. The interlocking device (3) includes a slider (31) adapted to the slide groove (21), a limiting block (32) provided at the bottom of the base plate (2) and detachably connected to the bottom of the slider (31), and a push rod (33) connected to the top of the slider (31). When the slider (31) is in the middle position of the slide groove (21), the limiting block (32) simultaneously restricts the closing of the main circuit breaker and the standby circuit breaker.

2. An interlock protection structure for a metering box according to claim 1, characterized in that: It also includes a limiting part (321) provided on one side of the limiting block (32).

3. An interlock protection structure for a metering box according to claim 1, characterized in that: The slider (31) is provided with an elastic limiting mechanism (34).

4. An interlock protection structure for a metering box according to claim 3, characterized in that: The elastic limiting mechanism (34) includes a circular hole (341) on both sides of the slider (31), a compression spring (342) in the circular hole (341), and a ball (343) connected to the compression spring (342).

5. An interlock protection structure for a metering box according to claim 4, characterized in that: The sidewall of the slide (21) is provided with a number of hemispherical slots (211) for limiting the sliding of the interlocking device (3) and for matching the ball (343).

6. An interlock protection structure for a metering box according to claim 1, characterized in that: The bracket (1) is provided with mounting holes (11) for connecting to the metering box.

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