Mechanical interlocking device of molded case circuit breaker

Abstract

The interlocking device comprises a connecting base plate, a sliding cavity and a mechanism lock, the sliding cavity is formed in the middle of the surface of the front side of the connecting base plate, bottom feet of the sliding cavity are connected with the connecting base plate through bolts, and a lock plate is arranged in the middle of the outer surface of the sliding cavity in a transverse cutting and bending mode. The mechanical interlocking device comprises a sliding cavity, screw holes are formed in the upper portion of a lock plate of the sliding cavity in a bilateral symmetry mode, a mechanism lock is horizontally arranged on the upper portion of the lock plate in the transverse direction, lock holes are formed in the surfaces of a limiting plate and the lock plate of the mechanism lock in a mutually aligned mode, and the rear surface of the mechanism lock is attached to the outer side surface of the sliding cavity. The mechanical interlocking device prevents the two circuit breakers from being in the closing position at the same time, is easy to install, can be installed and used without a special tool, brings great convenience to a user, replaces part of expensive imported equipment, and provides one more choice for the user.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical interlocking of circuit breakers, and specifically relates to a mechanical interlocking device of a molded case circuit breaker. Background Art

[0002] In the specific application scenario of molded case circuit breakers, two molded case circuit breakers are needed to control two sets of power supplies, and it is not allowed to supply power to the two sets of power supplies at the same time. If the power is supplied at the same time, some adverse consequences may occur. In the above case, there will be a situation where the market application needs cannot be met.

[0003] In the prior art, the patent name is: A molded case circuit breaker provided with a mechanical interlocking device, and the patent number is: CN106548910A, which discloses a molded case circuit breaker provided with a mechanical interlocking device, including: the first molded case circuit breaker and the second molded case circuit breaker are both provided with switches for controlling the closing and opening of the circuit breaker, the mechanical interlocking device includes a mechanism lock and an interlocking mechanism, the two sides of the interlocking mechanism are respectively fixedly connected with the first molded case circuit breaker and the second molded case circuit breaker, and a sliding cavity is provided thereon, the mechanism lock is arranged in the sliding cavity, and can slide left and right in the sliding cavity, the mechanism lock is arranged above the switch in the disconnected state, when the mechanism lock slides to the left, it can block the closing of the switch of the first molded case circuit breaker, and when the mechanism lock slides to the right, it can block the closing of the switch of the second molded case circuit breaker. The structure of the present invention can realize: 1. Opening the left and right sides at the same time; 2. Opening the left side and closing the right side; 3. Opening the right side and closing the left side. The present invention is easy to operate and has a simple structure, and solves the problem of two power supplies not supplying power at the same time.

[0004] However, in the prior art, since the interlocking mechanism is directly connected between the two circuit breakers, the interlocking mechanism can only be adapted to one type of circuit breaker and cannot be widely adapted. In addition, the mechanism lock is only connected by sliding through a guide column and a slide groove. Although it can be easily moved and adjusted, it is also very easy to cause the mechanism lock to shift due to vibration or accidental touch, thereby making the interlocking mechanism invalid, thereby causing safety hazards. Summary of the invention

[0005] In order to solve the above problems, this paper proposes a mechanical interlocking device for molded case circuit breakers. The interlocking device is arranged between two circuit breakers. The interlocking device includes a connecting substrate, a sliding cavity and a mechanism lock. The four corners of the connecting substrate are connected to the gap between the two circuit breakers by bolts. A sliding cavity is arranged in the middle of the front surface of the connecting substrate. The sliding cavity is a bent C-shaped folding plate. The bottom foot of the sliding cavity is connected to the connecting substrate by bolts. A locking plate is arranged in a horizontally cut and bent manner in the middle of the outer surface of the sliding cavity. Screw holes are symmetrically arranged above the lock plate of the sliding cavity. A mechanism lock is arranged horizontally above the lock plate. The shape of the mechanism lock is a horizontally long rectangular plate. A limit plate is arranged horizontally and vertically in the bottom center of the mechanism lock. A sliding groove is symmetrically arranged in the middle of the mechanism lock. The limit plate and the lock plate surface of the mechanism lock are aligned with each other and are provided with lock holes. The bottom surface of the limit plate of the mechanism lock is fitted and connected with the upper surface of the lock plate. The rear surface of the mechanism lock is fitted with the outer surface of the sliding cavity. The shape of the slide groove is a horizontal strip waist hole. Screws are symmetrically provided through the middle of the slide groove. The outer diameter of the screw is the same as the width of the slide groove. A limit screw head is provided at the outer end of the screw, which solves the shortcomings of the molded case circuit breaker in specific application scenarios. The mechanical interlocking device interlocks the two circuit breakers and is a mechanical interlocking device that prevents the two circuit breakers from being in the closed position at the same time. The mechanical interlocking device is simple to install and can be installed and used without special tools, which greatly facilitates users and replaces some expensive imported equipment, providing users with more choices.

[0006] The shape of the connecting substrate is a vertical rectangular plate, the outer contour width of the connecting substrate is the same as the spacing between the two circuit breakers, the four corners of the outer side of the long side of the outer contour of the connecting substrate are provided with fixed ear holes, the connecting substrate is fixedly connected to the assembly holes on the two side surfaces of the circuit breaker through the fixed ear holes, the sliding cavity is a rectangular four-sided bent plate, the upper and lower sides of the sliding cavity are provided with double-section bent C-shaped bottom feet, the left and right sides of the sliding cavity are both bent inwardly and provided with reinforcing ribs, and the front lower part of the sliding cavity is cut with a folding groove, the shape of the folding groove is a U-shaped groove, and the upper side of the folding groove is horizontally and vertically provided with a locking plate, the sliding cavity is connected to the connecting substrate through the C-shaped bottom feet, the height of the C-shaped bottom feet is the same as the switch height of the circuit breaker, the mechanical interlocking of the molded case circuit breaker is to achieve interlocking through mechanical components, and the mechanical interlocking device belongs to an additional device of the molded case circuit breaker, which realizes the functions that the molded case circuit breaker originally could not achieve without affecting the performance of the circuit breaker, and improves the shortcomings of large error range and inaccurate stroke when achieving the same function. This control method through pure mechanical structure has greatly improved reliability compared to electrical interlocking. In emergency backup power supply, the mechanical interlocking of molded case circuit breakers is very important.

[0007] The horizontal length of the mechanism lock is the same as the spacing between the outer sides of the switches of the two circuit breakers. The bottom of the mechanism lock is vertically bent forward and provided with a limit plate. The surface of the limit plate and the surface of the lock plate are aligned with each other and provided with a lock hole. The shape of the lock hole is a center hole. The inner diameter of the lock hole is the same as the diameter of the lock rod of the padlock. The lock holes are symmetrically arranged with the vertical center line of the lock plate as the center. The center spacing of adjacent lock holes is the same as the switch width of the circuit breaker. The limit plate and the lock plate of the mechanism lock are interpenetrated through the lock holes and fixedly connected by padlocks. The sliding cavity is also provided with three lock holes, which can be hung with three padlocks to lock the positions of the above three interlocking states. The keys of these three padlocks can be distributed to three responsible persons. If the interlocking position status of two molded case circuit breakers is to be changed on site, three responsible persons must be present at the same time to open the padlock. Therefore, the present invention greatly improves safety and reliability.

[0008] Beneficial effects:

[0009] The shortcomings of molded case circuit breakers in specific application scenarios are solved. The mechanical interlocking device interlocks the two circuit breakers. It is a mechanical interlocking device that prevents the two circuit breakers from being in the closed position at the same time. This mechanical interlocking device is easy to install and can be installed and used without special tools, which greatly facilitates users. It also replaces some expensive imported equipment and provides users with more choices.

[0010] The sliding cavity is also provided with three lock holes, which can be hung with three padlocks to lock the positions of the above three interlocking states. The keys of the three padlocks can be distributed to three responsible persons. If the interlocking position states of two molded case circuit breakers are to be changed on site, three responsible persons must be present at the same time to open the padlocks. Therefore, the present invention greatly improves safety and reliability.

[0011] The mechanical interlock of the molded case circuit breaker is to achieve interlocking through mechanical parts. The mechanical interlocking device is an additional device of the molded case circuit breaker. Under the premise of ensuring that the performance of the circuit breaker is not affected, it realizes the functions that the molded case circuit breaker cannot achieve, and improves the shortcomings of large error range and inaccurate stroke when achieving the same function. This control method through a purely mechanical structure greatly improves the reliability compared to electrical interlocking. In the emergency backup power supply, the mechanical interlock of the molded case circuit breaker is very important. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of a mechanical interlocking device of a molded case circuit breaker;

[0013] Figure 2 It is a top view schematic diagram of a mechanical interlocking device of a molded case circuit breaker;

[0014] Figure 3 It is a side view schematic diagram of a mechanical interlocking device of a molded case circuit breaker;

[0015] Figure 4 It is a schematic diagram of the right-side opening lock of the mechanical interlocking device of a molded case circuit breaker;

[0016] Figure 5 It is a schematic diagram of the left-side opening lock of the mechanical interlocking device of a molded case circuit breaker;

[0017] Figure 6 It is a schematic diagram of the left and right opening of the mechanical interlocking device of a molded case circuit breaker;

[0018] In the figure; 1, connecting base plate, 2, sliding cavity, 3, mechanism lock, 4, sliding groove, 5, screw, 6, locking plate, 7, locking hole. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] Connecting base plate 1, sliding cavity 2, mechanism lock 3, sliding groove 4, screw 5, locking plate 6, locking hole 7.

[0021] like Figure 1 , 2 , 3, 4, 5, 6;

[0022] A mechanical interlocking device for a molded case circuit breaker, the interlocking device is arranged between two circuit breakers, the interlocking device comprises a connecting substrate 1, a sliding cavity 2 and a mechanism lock 3, the four corners of the connecting substrate 1 are connected to the gap between the two circuit breakers by bolts, the middle of the front side surface of the connecting substrate 1 is provided with a sliding cavity 2, the sliding cavity 2 is a bent C-shaped folding plate, the bottom foot of the sliding cavity 2 is connected to the connecting substrate 1 by bolts, the middle of the outer surface of the sliding cavity 2 is horizontally cut and bent to provide a lock plate 6, the upper part of the lock plate 6 of the sliding cavity 2 is symmetrically provided with screw holes, the upper part of the lock plate 6 is horizontally provided with a mechanism lock 3, the mechanism lock 3 The shape is a horizontally long rectangular plate, a limit plate is provided in the center of the bottom of the mechanism lock 3 in a horizontal and vertical manner, a slide groove 4 is provided in the middle of the mechanism lock 3 in a symmetrical manner, the limit plate and the lock plate 6 of the mechanism lock 3 are aligned with each other and are provided with lock holes 7, the bottom surface of the limit plate of the mechanism lock 3 is fitted and connected with the upper surface of the lock plate 6, the rear surface of the mechanism lock 3 is fitted with the outer surface of the sliding cavity 2, the shape of the slide groove 4 is a horizontal strip waist hole, and screws 5 are provided in the middle of the symmetrical slide grooves 4, the outer diameter of the screws 5 is the same as the width of the slide groove 4, and a limit screw head is provided at the outer end of the screw 5, and the shape of the connecting substrate 1 is a vertical rectangular plate. The outer contour width of the connecting substrate 1 is the same as the spacing between the two circuit breakers. The four corners of the outer long side of the outer contour of the connecting substrate 1 are provided with fixed ear holes. The connecting substrate 1 is fixedly connected to the assembly holes on the surfaces of both sides of the circuit breaker through the fixed ear holes. The sliding cavity 2 is a rectangular four-sided bent plate. The upper and lower sides of the sliding cavity 2 are provided with double-section bent C-shaped bottom feet. The left and right sides of the sliding cavity 2 are both bent inwardly and provided with reinforcing ribs. The front lower part of the sliding cavity 2 is cut with a folding groove. The shape of the folding groove is a U-shaped groove. The upper side of the folding groove is horizontally and vertically provided with a locking plate 6. The sliding cavity 2 is connected to the connecting substrate through the C-shaped bottom feet. 1 is connected, the height of the C-shaped foot edge is the same as the switch height of the circuit breaker, the horizontal length of the mechanism lock 3 is the same as the spacing between the outer sides of the switches of the two circuit breakers, the bottom of the mechanism lock 3 is vertically bent forward and provided with a limit plate, the surface of the limit plate and the surface of the lock plate 6 are aligned with each other and provided with a lock hole 7, the shape of the lock hole 7 is a center hole, the inner diameter of the lock hole 7 is the same as the diameter of the lock rod of the padlock, the lock holes 7 are symmetrically provided with three with the vertical midline of the lock plate 6 as the center, the center spacing of adjacent lock holes 7 is the same as the switch width of the circuit breaker, and the limit plate and the lock plate 6 of the mechanism lock 3 are mutually penetrated through the lock holes 7 and are fixedly connected by a padlock.

[0023] Implementation examples;

[0024] The mechanical interlocking device interlocks the two circuit breakers and is a mechanical interlocking device that prevents the two circuit breakers from being in the closed position at the same time. The first molded case circuit breaker and the second molded case circuit breaker are both provided with switches for controlling the closing and opening of the circuit breakers. The mechanical interlocking device includes a mechanism lock 3 and a connecting substrate 1. The two sides of the connecting substrate 1 are respectively fastened to the first molded case circuit breaker and the second molded case circuit breaker with screws 5, and a sliding cavity 2 is provided thereon. The mechanism lock 3 is provided on the outside of the sliding cavity 2 and slides left and right through the sliding groove 4 and the screw 5. The mechanism lock 3 is provided above the switch in the open state: 1. When the mechanism lock 3 slides to the left on the connecting substrate 1 through the sliding groove 4 , it limits the switch of the first molded case circuit breaker on the left to close upward, and releases the switch of the second molded case circuit breaker on the right so that it can close upward; 2. When the mechanism lock 3 slides to the right on the connecting substrate 1 through the slide slot 4, it limits the switch of the second molded case circuit breaker on the right to close upward, and releases the switch of the first molded case circuit breaker on the left so that it can close upward; 3. When the mechanism lock 3 moves to the middle position between the switches of the first and second molded case circuit breakers on the interlocking mechanism through the slide slot 4, it limits the left and right molded case circuit breaker switches from closing upward at the same time.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical interlocking device for a molded case circuit breaker, the interlocking device being arranged between two circuit breakers, characterized in that: The interlocking device comprises a connecting substrate, a sliding cavity and a mechanism lock. The four corners of the connecting substrate are connected to the gap between the two circuit breakers by bolts. A sliding cavity is provided in the middle of the front side surface of the connecting substrate. The sliding cavity is a bent C-shaped folding plate. The bottom foot of the sliding cavity is connected to the connecting substrate by bolts. A locking plate is provided in the middle of the outer surface of the sliding cavity in a transverse cut and bent manner. Screw holes are symmetrically provided above the lock plate of the sliding cavity. A mechanism lock is provided horizontally above the lock plate. The shape of the mechanism lock is a transverse long rectangular plate. A limit plate is provided horizontally and vertically at the bottom center of the mechanism lock. A slide groove is symmetrically provided in the middle of the mechanism lock. The limit plate and the lock plate surface of the mechanism lock are aligned with each other and provided with lock holes. The bottom surface of the limit plate of the mechanism lock is connected to the upper surface of the lock plate. The rear surface of the mechanism lock is connected to the outer surface of the sliding cavity. The shape of the slide groove is a transverse strip waist hole. Screws are provided in the middle of the symmetrical slide grooves. The outer diameter of the screw is the same as the width of the slide groove, and a limit screw head is provided at the outer end of the screw.

2. A mechanical interlocking device for a molded case circuit breaker according to claim 1, characterized in that: The connection substrate is in the shape of a vertical rectangular plate. The width of the outer contour of the connection substrate is the same as the spacing between the two circuit breakers. Fixing ear holes are provided at the four corners of the outer long side of the outer contour of the connection substrate. The connection substrate is fixedly connected to the assembly holes on the two side surfaces of the circuit breaker through the fixing ear holes.

3. The mechanical interlocking device of a molded case circuit breaker according to claim 1, characterized in that: The sliding cavity is a rectangular four-sided bent plate, and the upper and lower sides of the sliding cavity are provided with double-section bent C-shaped bottom foot edges, and the left and right sides of the sliding cavity are provided with reinforcing ribs that are bent inward, and a folding groove is cut at the lower front of the sliding cavity. The shape of the folding groove is a U-shaped groove, and a locking plate is provided horizontally and vertically on the upper side of the folding groove. The sliding cavity is connected to the connecting base plate through the C-shaped bottom foot edge, and the height of the C-shaped bottom foot edge is the same as the switch height of the circuit breaker.

4. The mechanical interlocking device of a molded case circuit breaker according to claim 1, characterized in that: The horizontal length of the mechanism lock is the same as the spacing between the outer sides of the switches of the two circuit breakers. The bottom of the mechanism lock is vertically bent forward and provided with a limit plate. The surface of the limit plate and the surface of the lock plate are aligned with each other and provided with lock holes.

5. The mechanical interlocking device of a molded case circuit breaker according to claim 1, characterized in that: The lock hole is in the shape of a central hole, the inner diameter of the lock hole is the same as the lock rod diameter of the padlock, and three lock holes are symmetrically arranged with the vertical center line of the lock plate as the center, and the distance between the centers of adjacent lock holes is the same as the switch width of the circuit breaker.

6. A mechanical interlocking device for a molded case circuit breaker according to claim 5, characterized in that: The limit plate and the lock plate of the mechanism lock are mutually penetrated through the lock hole and are fixedly connected by a padlock.

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