CN112768273A

CN112768273A - Multi-switch interlocking device of power distribution cabinet

Info

Publication number: CN112768273A
Application number: CN202110171414.0A
Authority: CN
Inventors: 安洋; 刘竞凡; 滕远林; 陈语霄; 张江
Original assignee: Zhong Tongfu Energy Conservation Technology Services Co ltd
Current assignee: Zhong Tongfu Energy Conservation Technology Services Co ltd
Priority date: 2021-02-08
Filing date: 2021-02-08
Publication date: 2021-05-07

Abstract

The invention provides a multi-switch interlocking device of a power distribution cabinet, belonging to the technical field of power supply and distribution equipment. The multi-switch interlocking device of the power distribution cabinet can realize modification and adjustment of interlocking of a plurality of switches, realize the purpose that when one or more switches are simultaneously opened, the other switches are locked and cannot be opened, and prevent misoperation of opening other switches when one or more parallel switches are opened, so as to cause short-circuit accidents. The structure is small in size, installation and operation are simple, other switches are locked when one switch is opened by using a mechanical interlocking mode, and safety and stability are better.

Description

Multi-switch interlocking device of power distribution cabinet

Technical Field

The invention relates to an auxiliary device of communication equipment, in particular to a locking device aiming at low-voltage distribution power supply conduction in a communication machine room, and specifically relates to a multi-switch interlocking device of a power distribution cabinet.

Background

In a power supply system of an uninterruptible power supply, a scheme that a storage battery has parallel operation and needs bypass maintenance is adopted, so that two paths of switches need to be switched on simultaneously and operate in parallel, and the requirement that the bypass switch forbids switching on when the other two paths of switches are switched on is also needed. The traditional solution is that the third circuit breaker is in a closed state and provided with a padlock device, the third circuit breaker is locked by using the padlock, and when the three-way circuit breaker needs to be used, the other two ways are closed firstly, and then the third circuit padlock is opened, so that the circuit breaker can be closed. However, the padlock can be freely opened due to human factors, two or more disconnecting switches are easily switched on simultaneously by mistake when the switch is operated, and serious accidents such as short circuit of a plurality of power supplies can happen at the time. The second method is to electrically control the interlocking among a plurality of switches, and is poor in economy, stability and reliability.

In order to ensure the safe operation of the power distribution equipment, improve the power supply reliability and prevent the accidents caused by the inlet wire and the grid connection of two different-phase power supplies, a breaker is usually provided with mechanical interlocking, so that the method is an effective and feasible means for preventing the accidents such as misoperation and the like.

Disclosure of Invention

The device meets the requirement that when multiple paths of power supplies are fed, one or multiple paths of power supplies can be simultaneously supplied for multiple paths, and other paths of power supplies cannot be simultaneously supplied for any of the multiple paths.

The device relates to an interlocking device for the technical field of power supply and distribution equipment, which comprises 2 fixed supports, 2 sliding arms, a main lock hole, 2 auxiliary locks, sliding arm limiting teeth, a cylindrical poking rod and 2 limiting devices for fixing the positions of the sliding arms, wherein the fixed supports are used for being fixed between interlocking switches, and the sliding arms can slide along the supports and are used for blocking and allowing a switch handle to be closed and opened.

Furthermore, 2 shape limiters are provided, elongated limiting holes are formed in the limiters and used for fixing the sliding distance of the cylindrical poke rod to limit the sliding distance of the sliding arm, the shape limiters are respectively installed on the two fixing supports and used for fixing the position and the sliding direction of the sliding arm, and an elongated channel is formed in the square limiter and used for limiting the sliding distance of the sliding arm;

furthermore, the sliding arm is irregular and long, and sliding arm limiting teeth for blocking and allowing opening and closing are arranged on the sliding arm.

Furthermore, the slide arm is provided with 2 cylindrical poking rods which are respectively inserted into the two limiters and used for poking the slide arm and playing a limiting role.

Furthermore, the slider is provided with 1 main locking hole, the shape limiter is provided with 2 auxiliary limiting locking holes, and after the slider slides left and right to align 1 auxiliary locking hole with the main locking hole, a lock can be used to pass through the main locking hole and the auxiliary locking hole to lock the limiting slider.

Drawings

FIG. 1 is a schematic view of a mounting bracket of the present invention.

Fig. 2 is a schematic view of the stopper of the present invention.

FIG. 3 is a schematic view of the slider arm of the present invention.

Fig. 4 is a schematic view of the invention as a whole.

Fig. 5 shows the present invention in a single-path power-on, two-path locking state.

Fig. 6 shows the two-way power supply conduction and one-way locking state in the application of the present invention.

Wherein: 1-a stopper; 2-a channel; 3-limiting holes; 4-secondary lock hole; 5-a cylindrical poker rod; 6-a slide arm; 7-main lock hole.

Detailed Description

The invention is further described below with reference to the figures and examples.

As shown in fig. 1-4, is an embodiment of the present invention, comprising a cradle (fig. 1) secured between 3 circuit breakers and a 6-wiper mounted on the cradle and slidable. The bracket (fig. 1) may be rectangular and made of a 2mm steel plate. The 6-sliding arm is irregular and long, and can also be made of a 2mm steel plate, as shown in fig. 2, the length of the 6-sliding arm is equal to that of the closing handles of the circuit breakers at two ends, and 2 5-cylindrical poking rods are arranged at the positions of the lengths of the sliding arms 1/3 and 2/3. The middle part of the bracket (figure 1) is provided with 4 screw holes for fixing a 1-position limiter, as shown in figure 1. The 1-position limiter is composed of a main body and a back plate, as shown in figure 3, the main body is provided with a 2-channel, a 3-position limiting hole and a 4-auxiliary lock hole, the back plate is used for covering the back surface of the main body, screw holes are formed in the periphery of the back plate and are fixed with 4 screw holes of a support (as shown in figure 1), after screws are screwed, the back plate and the 2-channel form a position limiting channel for fixing the 6-sliding arm, so that the 6-sliding arm can move freely, and the effect is as shown in figure 4. Two 5-cylindrical poke rods of the 6-sliding arm can be sleeved on the 3-limiting hole of the 1-limiting stopper. The effect is shown in fig. 4. The length of the 3-limiting hole is equivalent to the moving distance of the limiting 6-sliding arm, namely when the sliding arm moves leftwards until the 5-cylindrical poking rod blocks the right side of the limiting hole, the left end of the limiting 6-sliding arm can clamp a switch on the left circuit breaker to prevent the switch from moving. The reverse movement is also possible.

The 1-position limiter is also provided with 2 4-auxiliary lock holes which protrude outwards. Correspondingly, a 7-main lock hole matched with the 4-auxiliary lock hole is arranged at the lower edge of the limiting 6-sliding arm. The 7-main lock hole can be respectively aligned with the 2 4-auxiliary lock holes along with the movement of the 6-sliding arm, and the 6-sliding arm is respectively corresponding to the state that one circuit breaker is limited to be switched on, two circuit breakers are locked or two circuit breakers are switched on, and one circuit breaker is locked. When the 4-auxiliary lock hole is aligned with the 7-main lock hole, a lockset can penetrate through the main lock hole and the auxiliary lock hole to lock the 6-sliding arm. The 2 4-auxiliary lock holes and the 7-main lock hole can be manufactured by a method of firstly punching a groove on a 1-limiting stopper or a 6-sliding arm and then bending the groove, and then, holes are formed to finish the manufacture of the main lock hole and the auxiliary lock hole.

When the circuit breaker is used, 3 circuit breakers are installed in a low-voltage power distribution cabinet, and the distance between switches on adjacent circuit breakers is ensured to be larger than the length of a support (shown in figure 1) by 3-5 mm. Then, a cradle (fig. 1) was mounted between the mounting plates of the 2 circuit breakers by using a self-tapping screw in a bridging manner. When one path of power supply needs to be limited, the pull rod on the limiting sliding arm is pulled, so that the limiting sliding arm moves to one side until the limiting sliding arm is blocked by the circular guide post, as shown in fig. 5. At this time, one end of the 6-sliding arm can extend to the upper part of the two breaker switches to prevent the switches from being closed, so that the state of conducting power supply is ensured. When two paths of power supply are required to be conducted simultaneously, the pull rod is pulled to enable the limiting sliding arm to move to the right side, as shown in fig. 6. At the moment, the length of the limiting sliding arm is smaller than the switching-on and switching-off distance of the handles of the 2 circuit breakers, so that the handles on the 2 circuit breakers can move, and at the moment, the third circuit breaker cannot be switched on due to the fact that the limiting tooth blocks the switching-on position of the handle of the third circuit breaker, and therefore the requirements that two paths of power supplies are simultaneously switched on and the other circuit breaker is locked are met. Meanwhile, in each state, one auxiliary lock hole can be aligned with the main lock hole, and a lockset such as a padlock is additionally arranged on the auxiliary lock hole, so that the limiting sliding arm cannot move, and the safety can be greatly improved.

The parts not involved in the present invention are the same as or can be implemented using the prior art.

Claims

1. Switch board multi-switch interlock, its characterized in that: the locking mechanism comprises 2 fixed supports for being fixed between interlocking switches, 2 sliding arms which can slide along the supports and are used for blocking and allowing the opening and closing of the switch handle switches, a main locking hole, 2 auxiliary locking holes, sliding arm limiting teeth, a cylindrical poking rod and 2 limiting devices for fixing the positions of the sliding arms.

2. The switch board multi-switch interlock device of claim 1, characterized in that: a fixed bracket fixed between the interlocking switches and used for supporting the whole mechanical interlocking device, a stopper for fixing the position of the sliding arm is fixed on the bracket, and the sliding arm which can slide along the bracket and is used for blocking and allowing the switch handle to be closed and opened passes through the stopper, thereby forming a basic frame of the whole mechanical interlocking device; the height and the size of the fixed support fixed between the interlocking switches can be adjusted according to the overall dimension of the switch and the dimension of a power distribution cabinet for installing the switch, so that the whole mechanical interlocking device can accurately cover the periphery of the switch handle, and the sliding arm can normally block and allow the switch handle to be shifted up and down (opening and closing).

3. The switch board multi-switch interlock device of claim 1, characterized in that: the sliding arm which can slide along the support and is used for blocking and allowing the switch to be closed and opened can be covered in the range of the switch on-off handle under the support of the fixed support, the sliding arm is provided with a limiting tooth for blocking the switch on and a limiting tooth for allowing the switch to be switched on, meanwhile, the sliding arm is also provided with a cylindrical poking rod which can limit the sliding arm to horizontally slide left and right in the limiter, and the cylindrical poking rod also plays a role in operating the sliding arm to horizontally slide.

4. The switch board multi-switch interlock device of claim 1, characterized in that: the limiting device for fixing the position of the sliding arm is provided with a channel, the channel consists of a main body and a back plate, the sliding arm penetrates through the channel, meanwhile, the surface of the limiting device is provided with a limiting hole for penetrating through a cylindrical poking rod on the sliding arm, and the length of the limiting hole is determined according to the size of the switch handle and the opening and closing opening.

5. The switch board multi-switch interlock device of claim 1, characterized in that: the sliding arm main lock hole and the limiter auxiliary lock hole are combined in a set, when the two lock holes are in a vertical position, the whole device can be locked by passing a padlock through the two lock holes, so that the whole device cannot slide again, and the safety problem of electrical equipment caused by misoperation is prevented.

6. The switch board multi-switch interlock device of claim 1, characterized in that: the typical service condition of the multi-switch interlocking device for the power distribution cabinet is that 3 switches are mechanically interlocked, the interlocking of more paths can be expanded, and only more closing ports and opening ports need to be added on the sliding arm.