High-reliability mechanical interlocking mechanism for switchgear

Abstract

The present invention relates to the technical field of switchgear lower door interlocking. Disclosed is a high-reliability mechanical interlocking mechanism for a switchgear, comprising a circuit breaker handcart chassis push plate, a pushing assembly, a limiting member, a translation assembly, a second connecting member, a first connecting member, a locking assembly, and a reset assembly. The first connecting member is mounted at the upper end of the inner surface of a switchgear door; the second connecting member is mounted at the upper end of the inner surface of the switchgear door; the locking assembly is mounted between the first connecting member and the second connecting member; the pushing assembly is mounted on the inner surface of a switchgear body upper plate; the circuit breaker handcart chassis push plate is arranged on the pushing assembly; the limiting member is mounted at the left side of the lower end of the pushing assembly; one end of the translation assembly is inserted in the limiting member, and the other end of the translation assembly penetrates through the second connecting member and abuts against the right side of the locking assembly; and the reset assembly is mounted between the translation assembly and the limiting member. In this way, the problem in the prior art of electric shock risk caused by people accidentally entering electrified compartments due to unreliable use of electrical interlocks and hook locks is solved, thereby improving the safety performance and the universality of interlocking mechanisms.

Description

A high-reliability switch cabinet mechanical interlocking mechanism Technical Field

[0001] The present invention relates to the technical field of switch cabinet lower door interlocking, and in particular to a high-reliability switch cabinet mechanical interlocking mechanism. Background Art

[0002] In the KYN28 cabinet, in order to meet the five-protection interlocking requirements, the front lower door of the cabinet usually uses an electromagnetic lock to achieve the requirement of accidentally entering the interval with power on, or uses a padlock to manually open and close the door or uses the circuit breaker trolley's built-in interlock to lock the door.

[0003] In the existing technology, installing an electromagnetic lock is an electrical interlock, but electrical interlocks are unreliable and pose safety hazards. Although the use of a padlock is mechanical, it is not linked to the circuit breaker. In the case of human error, it is inevitable that people will accidentally enter the energized compartment, and human safety is not fully guaranteed. The circuit breaker itself has an interlock, which will significantly increase the manufacturing cost of the company's products, especially for big-name circuit breakers such as Schneider and ABB. Non-standard configurations are usually either expensive or do not have such an interlock.

[0004] Therefore, how to provide a highly reliable mechanical interlocking mechanism for a switch cabinet to solve the problem of potential safety hazards when using existing electrical interlocks and padlocks is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0005] To this end, the present invention provides a highly reliable mechanical interlocking mechanism for a switch cabinet to solve the problem in the prior art of the risk of electric shock caused by people mistakenly entering a live compartment due to unreliable use of electrical interlocks and padlocks.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention discloses a high-reliability switch cabinet mechanical interlocking mechanism, comprising:

[0008] A first connecting member is mounted on the upper end of the inner surface of the cabinet door;

[0009] A second connecting member is mounted on the upper end of the inner surface of the cabinet door;

[0010] a locking assembly installed between the first connecting member and the second connecting member;

[0011] Push assembly, installed on the inner surface of the upper panel of the cabinet;

[0012] A push plate on the chassis of the circuit breaker trolley is arranged above the pushing assembly;

[0013] A limiting member, installed on the left side of the lower end of the pushing component;

[0014] A translation component, one end of which is inserted into the limiting member, and the other end of which passes through the second connecting member and presses against the right side of the locking component;

[0015] A reset assembly is installed between the translation assembly and the limiter;

[0016] The front and rear ends of the locking assembly pass through the surfaces of the first connecting member and the second connecting member respectively, and the translation assembly is transmission-connected to the limiting member.

[0017] In a possible implementation, the pushing component includes:

[0018] A mounting block is mounted on the inner surface of the upper plate of the cabinet, and the interior of the mounting block is a hollow structure;

[0019] Through holes are provided in pairs and opened at the front and rear ends of the mounting block;

[0020] A flap, the bottom end of which passes through the bottom of the mounting block, the top end of which passes through the upper panel of the cabinet, and the translation assembly is attached to the left side of the bottom end of the flap;

[0021] A cylindrical push block is mounted on the front surface of the upper end of the flap, and the left end of the cylindrical push block is attached to the push plate of the circuit breaker trolley chassis;

[0022] The connecting rod passes through the through hole and the middle part of the flap in sequence.

[0023] In one possible implementation, the translation component includes:

[0024] A movable rod, the rod body of which is transmission-connected to the limiting member;

[0025] a stopper, mounted above the right end of the moving rod;

[0026] A push rod, one end of which is inserted into the left end of the moving rod and the other end is pressed against the right side of the locking assembly;

[0027] Push rod fixing holes are provided on the front and rear sides of the left end of the moving rod;

[0028] The reset component fixing hole is opened on the front side of the left end of the moving rod, and the reset component fixing hole is arranged above the push rod fixing hole.

[0029] In one possible implementation, the locking component includes:

[0030] The locking pin main shaft has two ends passing through the surfaces of the first connecting member and the second connecting member in sequence;

[0031] A locking pin spindle bend piece is mounted on the rear end of the locking pin spindle, with the right end of the locking pin spindle bend piece attached to the left side of the translation assembly;

[0032] A driven lock pin bend piece is mounted on the front end of the lock pin main shaft;

[0033] A card plate is mounted on the rear surface of the first connecting member, and a circular hole is opened in the middle of the card plate;

[0034] A top block is provided below the driven lock pin bend piece and is placed above the clamping plate;

[0035] The upper end of the lock pin is installed on the bottom end of the top block, the lock pin rod body is arranged in the circular hole, and the bottom end of the lock pin passes through the bottom of the first connecting member.

[0036] In a possible implementation, the first connecting member includes:

[0037] L-shaped connecting plate, with several connecting holes on the surface of the plate;

[0038] A mounting plate having a locking assembly mounting hole formed on the plate body, the mounting plate being mounted behind the L-shaped connecting plate;

[0039] The front door panel lock pin hole bracket is arranged below the L-shaped connecting plate, and the front door panel lock pin hole bracket is installed on the inner side of the cabinet door.

[0040] In a possible implementation, the circuit breaker trolley chassis push plate is installed in the circuit breaker trolley.

[0041] In a possible implementation, the limiting member is a U-shaped connecting block.

[0042] In a possible implementation, the reset component is a spring.

[0043] The present invention pushes the push plate of the circuit breaker trolley chassis, and the push plate of the circuit breaker trolley chassis pushes the pushing assembly to move. At this time, the pushing assembly pushes the translation assembly toward the second connecting piece, and one end of the translation assembly passes through one end of the second connecting piece and moves forward, pushing the locking assembly to move, and the cabinet door is locked by the locking assembly. When it needs to be opened, the push plate of the circuit breaker trolley chassis is withdrawn, the resetting assembly will bring the translation assembly back, and the locking assembly will move again to unlock. This interlock mechanism not only fills the shortcomings of the existing switch cabinet lower door interlocking technology, but also solves the shortcomings of unreliable electromagnetic lock, lack of padlock safety, and high cost of the circuit breaker trolley itself with interlocking, while also improving the safety factor and scope of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0045] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0046] FIG1 is a perspective view of a high-reliability switch cabinet mechanical interlocking mechanism provided by the present invention;

[0047] FIG2 is a perspective view of a pushing assembly provided by the present invention;

[0048] FIG3 is a perspective view of a translation assembly provided by the present invention;

[0049] FIG4 is a perspective view of a locking assembly provided by the present invention;

[0050] FIG5 is a perspective view of a first connecting member provided by the present invention;

[0051] In the figure: 1 push plate of the circuit breaker trolley chassis; 2 pushing assembly; 21 cylindrical push block; 22 flap; 23 mounting block; 24 through hole; 25 connecting rod; 3 limiter; 4 translation assembly; 41 stopper; 42 moving rod; 43 push rod fixing hole; 44 push rod; 45 reset assembly fixing hole; 5 second connecting member; 6 first connecting member; 61 locking assembly mounting hole; 62 front door panel lock pin hole bracket; 63 L-shaped connecting plate; 64 connecting hole; 65 mounting plate; 7 locking assembly; 71 lock pin spindle bend piece; 72 driven lock pin bend piece; 73 ejector block; 74 lock pin; 75 lock pin spindle; 76 clamping plate; 8 reset assembly. DETAILED DESCRIPTION

[0052] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0053] Please refer to Figures 1 to 5 for a description of a steel cord cutting device disclosed in the present invention. The present invention consists of eight parts, as shown in Figure 1, including a circuit breaker trolley chassis push plate 1, a pushing assembly 2, a limiter 3, a translation assembly 4, a second connecting member 5, a first connecting member 6, a locking assembly 7 and a reset assembly 8. The first connecting member 6 is installed on the upper inner surface of the cabinet door, the second connecting member 5 is installed on the upper inner surface of the cabinet door, the locking assembly 7 is installed between the first connecting member 6 and the second connecting member 5, the pushing assembly 2 is installed on the inner surface of the cabinet upper plate, the circuit breaker trolley chassis push plate 1 is arranged above the pushing assembly 2, the limiter 3 is installed on the left side of the lower end of the pushing assembly 2, one end of the translation assembly 4 is inserted in the limiter 3, and the other end passes through the second connecting member 5 and is against the right side of the locking assembly 7, the reset assembly 8 is installed between the translation assembly 4 and the limiter 3, the front and rear ends of the locking assembly 7 pass through the surfaces of the first connecting member 6 and the second connecting member 5 respectively, and the translation assembly 4 is transmission connected to the limiter 3. When the present invention is in use, the chassis push plate 1 of the circuit breaker trolley installed at the bottom of the circuit breaker trolley is first used to push the chassis push plate 1 of the circuit breaker trolley into the box body. When it is pushed to the rear, the chassis push plate 1 of the circuit breaker trolley will first contact the cylindrical push block 21 in the push assembly 2. When it continues to move inward, the chassis push plate 1 of the circuit breaker trolley will push the cylindrical push block 21 backward. At this time, the cylindrical push block 21 will turn over with the flap 22, and at the same time, the bottom of the flap 22 moves in the opposite direction of the movement direction of the upper end of the flap 22, which will cause the circuit breaker trolley to turn over. The bottom of the flip plate 22 pushes the translation assembly 4 to slide in the limit member 3, and the other end of the translation assembly 4 pushes the locking assembly 7 to start rotating. At the same time, during the rotation of the locking assembly 7, the lock pin 74 is pushed out, and the cabinet door is locked by gradually extending the lock pin 74. When the cabinet door needs to be opened, the circuit breaker trolley carrying the circuit breaker trolley chassis push plate 1 is withdrawn. At this time, the recovery force of the reset assembly 8 will pull the translation assembly 4 back, and the locking assembly 7 is flipped again, and the lock pin 74 is withdrawn to complete the unlocking.

[0054] In a specific embodiment, as shown in Figure 2, the pushing assembly 2 includes a cylindrical pushing block 21, a flap 22, a mounting block 23, a through hole 24 and a connecting rod 25. The mounting block 23 is mounted on the inner surface of the upper plate of the cabinet. The interior of the mounting block 23 is a hollow structure. The through holes 24 are arranged in pairs and are opened at the front and rear ends of the mounting block 23. The bottom end of the flap 22 passes through the bottom of the mounting block 23, and the top passes through the upper plate of the cabinet. The translation assembly 4 is attached to the left side of the bottom end of the flap 22. The cylindrical pushing block 21 is mounted on the front surface of the upper end of the flap 22. The circuit breaker trolley chassis push plate 1 is attached to the left end of the cylindrical pushing block 21. The connecting rod 25 passes through the through hole 24 and the middle of the flap 22 in sequence. The mounting block 23 is mounted on the inner surface of the upper panel of the cabinet, and then the flap 22 is set in the mounting block 23 on the upper panel of the cabinet, with both ends passing through, in order to hide the lock and not take up too much space. At the same time, the length of the position where the flap 22 is installed should be greater than the length of the flap 22 itself, but shorter than the height of the flap 22. This can limit the flipping of the flap 22 and prevent excessive flipping that causes the flap 22 to be unable to be brought back by the reset component 8, thereby causing the cabinet door to be unable to open. The connecting rod 25 uses a cylindrical shape so that the flap 22 can be flipped on the connecting rod.

[0055] In a specific embodiment, as shown in Figure 3, the translation assembly 4 includes a stopper 41, a moving rod 42, a push rod fixing hole 43, a push rod 44 and a reset assembly fixing hole 45. The moving rod 42 is connected to the limit member 3 in a transmission manner. The stopper 41 is installed above the right end of the moving rod 42. One end of the push rod 44 is inserted into the left end of the moving rod 42, and the other end is pressed against the right side of the locking assembly 7. The push rod fixing hole 43 is opened on the front and rear sides of the left end of the moving rod 42. The reset assembly fixing hole 45 is opened on the front side of the left end of the moving rod 42. The reset assembly fixing hole 45 is set above the push rod fixing hole 43. The translation assembly 4 pushes the right end of the moving rod 42 to move through the bottom end of the flap 22, so that it can slide on the limit piece 3. After the moving rod 42 moves a certain distance, the stop block 41 is set to make the stop block 41 rest on the surface of the limit piece 3, thereby limiting the displacement of the moving rod 42 and effectively preventing the moving rod 42 from slipping. The design of the limit piece 3 is not only used to install the moving rod 42, but also to prevent the moving rod 42 from offsetting when moving. The movement of the limit rod 42 will be accompanied by the push rod 44 pushing the locking pin spindle bend 71, causing the locking pin spindle 75 to rotate. The design of the push rod fixing hole 43 and the reset assembly fixing hole 45 is used to install a limit bolt. The push rod fixing hole 43 can use the limit bolt adjuster to extend the length and position, while the reset assembly fixing hole 45 is limited to installing the limit bolt to fix the position of the reset assembly 8.

[0056] In a specific embodiment, as shown in Figure 4, the locking assembly 7 includes a lock pin spindle bend piece 71, a driven lock pin bend piece 72, a top block 73, a lock pin 74, a lock pin spindle 75 and a clamping plate 76. The two ends of the lock pin spindle 75 pass through the surfaces of the first connecting member 6 and the second connecting member 5 in sequence. The lock pin spindle bend piece 71 is installed on the rear end of the lock pin spindle 75, and the right end of the lock pin spindle bend piece 71 is attached to the left side of the translation assembly 4. The driven lock pin bend piece 72 is installed on the front end of the lock pin spindle 75, and the clamping plate 76 is installed on the rear surface of the first connecting member 6. A circular hole is opened in the middle of the clamping plate 76, and the top block 73 is arranged below the driven lock pin bend piece 72. The top block 73 is placed above the clamping plate 76. The upper end of the lock pin 74 is installed at the bottom end of the top block 73. The lock pin 74 rod body is arranged in the circular hole, and the bottom end of the lock pin 74 passes through the bottom of the first connecting member 6. Combining the two locking assemblies 72 and 73, the latch lock 7 is locked and the latch lock 7 is locked, and the locking assemblies 73 and 73 are locked, so that the latch lock 7 is locked and the door is locked.

[0057] In a specific embodiment, as shown in Figure 5, the first connecting member 6 includes a locking assembly mounting hole 61, a front door panel lock pin hole bracket 62, an L-shaped connecting plate 63, a connecting hole 64, and a mounting plate 65. The L-shaped connecting plate 63 has a plurality of connecting holes 64 formed on its surface, and the mounting plate 65 has locking assembly mounting holes 61 formed on its surface. The mounting plate 65 is mounted behind the L-shaped connecting plate 63, and the front door panel lock pin hole bracket 62 is disposed below the L-shaped connecting plate 63. The front door panel lock pin hole bracket 62 is mounted on the inside of the cabinet door. The front door panel lock pin hole bracket 62 is mounted on the cabinet door. When the cabinet door is closed, the lock pin 74 extends and inserts into the front door panel lock pin hole bracket 62 to lock the cabinet door.

[0058] In a specific embodiment, a circuit breaker trolley chassis push plate 1 is installed in a circuit breaker trolley. A trolley is a small, push-out portion of a switch cabinet, typically located in the center of the cabinet. The main electrical components within the cabinet are mounted on it. This is commonly referred to as a handcart. There are generally two types: PT trolleys and switch (circuit breaker) trolleys. A trolley, also called a trolley, is a type of trolley. For example, when a switch is disconnected, it can be manually removed from the cabinet after being fitted with guide rails for inspection or replacement. The circuit breaker trolley is slidably connected to the upper layer of the cabinet. The sliding design of the circuit breaker trolley allows the trolley chassis push plate 1 to easily contact the cylindrical push block 21.

[0059] In a specific embodiment, the limiting member 3 is a U-shaped connecting block. The limiting block 3 uses a U-shaped connecting block firstly because the U-shape can clamp and limit the translation assembly 4 at two points, which improves the installation effect, and also facilitates inspection when the translation assembly 4 becomes unable to move.

[0060] In a specific embodiment, the reset assembly 8 is a spring. The spring's elastic force realizes the switch. When the flap 22 flips over, the spring is in a stretched state after the translation assembly 4 is pushed out due to the continuous thrust of the push plate 1 on the chassis of the circuit breaker trolley. When the thrust of the push plate 1 on the chassis of the circuit breaker trolley is removed, the spring begins to retract due to the lack of force, pulling the translation assembly 4 back. At the same time, the translation assembly 4 pushes the flap 22 to flip in the opposite direction. When the flap 22 returns to its original position, the next operation can be carried out.

[0061] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A high-reliability switch cabinet mechanical interlocking mechanism, characterized in that: include: A first connecting member (6) is mounted on the upper end of the inner surface of the cabinet door; A second connecting member (5) is mounted on the upper end of the inner surface of the cabinet door; A locking assembly (7) is installed between the first connecting member (6) and the second connecting member (5); A push assembly (2) is mounted on the inner surface of the upper panel of the cabinet; A circuit breaker trolley chassis push plate (1) is arranged above the push assembly (2); A limiting member (3) is installed on the left side of the lower end of the pushing component (2); A translation component (4), one end of which is inserted into the limiting component (3), and the other end of which passes through the second connecting component (5) and is pressed against the right side of the locking component (7); A reset assembly (8) is installed between the translation assembly (4) and the limiting member (3); The front and rear ends of the locking assembly (7) pass through the surfaces of the first connecting member (6) and the second connecting member (5) respectively, and the translation assembly (4) is transmission-connected to the limiting member (3).

2. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, characterized in that: The pushing component (2) comprises: A mounting block (23) is mounted on the inner surface of the upper panel of the cabinet, and the interior of the mounting block (23) is a hollow structure; Through holes (24) are provided in pairs and are opened at the front and rear ends of the mounting block (23); A flap (22), the bottom end of which passes through the bottom of the mounting block (23), and the top end of which passes through the upper panel of the cabinet, the translation assembly (4) being attached to the left side of the bottom end of the flap (22); A cylindrical push block (21) is mounted on the front surface of the upper end of the flap (22), and the left end of the cylindrical push block (21) is attached to the circuit breaker trolley chassis push plate (1); The connecting rod (25) passes through the through hole (24) and the middle part of the flap (22) in sequence.

3. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, characterized in that: The translation assembly (4) comprises: A movable rod (42), the rod body of which is transmission-connected to the limiting member (3); A stopper (41) is mounted above the right end of the moving rod (42); A push rod (44), one end of which is inserted into the left end of the moving rod (42) and the other end of which is pressed against the right side of the locking assembly (7); Push rod fixing holes (43) are provided on both sides of the left end of the moving rod (42); The reset assembly fixing hole (45) is opened on the front side of the left end of the moving rod (42), and the reset assembly fixing hole (45) is arranged above the push rod fixing hole (43).

4. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, wherein: The locking assembly (7) comprises: The locking pin main shaft (75) has two ends passing through the surfaces of the first connecting member (6) and the second connecting member (5) in sequence; A locking pin spindle bend piece (71) is mounted on the rear end of the locking pin spindle (75), with the right end of the locking pin spindle bend piece (71) being attached to the left side of the translation assembly (4); A driven lock pin bend piece (72) is mounted on the front end of the lock pin main shaft (75); A card plate (76) is mounted on the rear surface of the first connecting member (6), and a circular hole is opened in the middle of the card plate (76); A top block (73) is arranged below the driven lock pin bend piece (72), and the top block (73) is placed above the clamping plate (76); The upper end of the locking pin (74) is mounted on the bottom end of the top block (73), the rod body of the locking pin (74) is arranged in the circular hole, and the bottom end of the locking pin (74) passes through the bottom of the first connecting member (6).

5. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, wherein: The first connecting member (6) comprises: An L-shaped connecting plate (63) having a plurality of connecting holes (64) formed on the surface of the plate; A mounting plate (65) having a locking assembly mounting hole (61) formed thereon, the mounting plate (65) being mounted behind the L-shaped connecting plate (63); The front door panel lock pin hole bracket (62) is arranged below the L-shaped connecting plate (63), and the front door panel lock pin hole bracket (62) is installed on the inner side of the cabinet door.

6. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, wherein: The circuit breaker trolley chassis push plate (1) is installed in the circuit breaker trolley.

7. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, wherein: The limiting member (3) is a U-shaped connecting block.

8. The high-reliability switch cabinet mechanical interlocking mechanism according to claim 1, wherein: The reset component (8) is a spring.

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