A "five-protection" door interlocking mechanism for electrical cabinets

Abstract

The present invention discloses a "five-protection" door interlocking mechanism for an electrical cabinet, including an auxiliary switch bent plate, a switch shaft, an opening and closing door plate and an interlocking plate, one end of the auxiliary switch bent plate is connected to a fixed seat, the center of the fixed seat is vertically connected to a push rod, the bottom of the push rod is extended and fixed with an interlocking plate, the opening and closing door plate is connected to the cabinet at one end of the fixed seat, the upper part of the auxiliary switch bent plate is laterally connected to the inside of the cabinet, and an earthing knife is mounted on the outer wall of the switch shaft, and a fan-shaped opening and closing knife is slidably connected to the switch shaft on one side of the earthing knife. The present invention uses a simple interlocking mechanism to open, close and lock the opening and closing door plate of the electrical cabinet, and can effectively drive the interlocking plate to open and close by powering on and off the fan-shaped opening and closing knife and combining the fan-shaped magnetic block to power on and off, which is convenient for the use and maintenance of the cabinet, effectively avoiding the phenomenon that the interlocking mechanism is opened when the vacuum circuit breaker is in the open state and is still powered on, thereby improving the safety of cabinet use and operation.

Description

Technical Field

[0001] The invention relates to the field of electric control cabinets, and in particular to a "five-protection" door interlocking mechanism for an electric cabinet. Background Art

[0002] With the continuous development of the power grid and the continuous updating of technology, electrical cabinets have become indispensable safety cabinets in daily life and industrial production. Electrical cabinets are mainly used to protect the normal operation of components. Therefore, electrical cabinets with electrical "five protection" functions have become an important requirement for power safety production.

[0003] Most of the anti-error devices of the "five-protection" functions of existing electrical cabinets have been continuously improved and perfected, but there is still a problem that when the vacuum circuit breaker is in closing operation, the machinery and cabinet doors on the grounding switches on the front and rear doors of the cabinet cannot be locked, and there is still a phenomenon of mistakenly entering the energized interval. Moreover, when the vacuum circuit breaker is in the open state, there will still be power on, but the existing "five-protection" interlocking mechanism cannot lock it in this case, so the safety of the use and operation of the cabinet cannot be guaranteed, and there are certain safety hazards. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] The technical problem to be solved by the present invention is to provide a "five-protection" door interlock mechanism for an electrical cabinet, which can effectively open and close and lock the opening and closing door panels of the electrical cabinet through a simple interlock mechanism, thereby increasing the convenience of cabinet use and maintenance, and can effectively avoid the phenomenon that the interlock mechanism is opened when the vacuum circuit breaker is in the open state but still energized, thereby improving the safety of cabinet use and operation.

[0006] 2. Technical solution

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] A "five-defense" door interlock mechanism for an electrical cabinet comprises an auxiliary switch bent plate, a switch shaft, an opening and closing door plate and an interlock plate, wherein the auxiliary switch bent plate is fixed to the inner wall of the cabinet, and one end of the auxiliary switch bent plate is connected to a fixing seat, a push rod is vertically slidably connected to the center of the fixing seat, and the top of the push rod extends to the top of the fixing seat, the top of the push rod is connected to a limit block, a compression spring is sleeved on the outer side of the push rod between the limit block and the fixing seat, and the two ends of the compression spring are respectively welded and fixed to the bottom of the limit block and the top of the fixing seat, and the bottom of the push rod extends to the fixing seat. An interlocking plate is fixed below the seat, and a lock groove is provided on the top of the interlocking plate away from one end of the top rod, the opening and closing door panel is connected to the cabinet at one end of the fixed seat, a grounding switch wheel is rotatably fixed on the outer side wall of the opening and closing door panel, and a lock buckle is connected to the inner wall of the opening and closing door panel just above the lock groove, a switch shaft is horizontally connected to the inside of the cabinet on one side of the opening and closing door panel above the auxiliary switch bent plate, one end of the switch shaft is fixedly connected to the grounding switch wheel, and a grounding knife is mounted on the outer side wall of the switch shaft close to one end of the opening and closing door panel, and a power switch is connected to the inside of the cabinet below the grounding knife. The outer wall of the switch shaft on the side of the grounding switch away from the closing door plate is slidably connected with a fan-shaped opening and closing switch through a shaft sleeve, and an electromagnetic plate is fixed on the side of the fan-shaped opening and closing switch away from the grounding switch, and the electromagnetic plate is electrically connected to the grounding switch through a wire. A connecting rod is provided inside the center of the upper and lower ends of the side of the fan-shaped opening and closing switch close to the electromagnetic plate, and a fan-shaped magnetic block is mounted on the outer wall of the switch shaft on the side of the fan-shaped opening and closing switch close to the electromagnetic plate. The setting direction of the fan-shaped magnetic block and the fan-shaped opening and closing switch is opposite to that of the grounding switch. The center of the upper and lower ends of the side of the fan-shaped magnetic block close to the electromagnetic plate is The center is connected with a connecting rod, one end of the two connecting rods extends to the inside of the two grooves respectively, and the fan-shaped magnetic blocks on the outside of the connecting rods are equipped with springs, and the other ends of the springs are fixedly connected to the electromagnetic plates on the outside of the grooves. A guide seat is fixed on the inner wall of the cabinet below the fan-shaped magnetic block and the fan-shaped opening and closing knife, and a latch is slidably connected inside the guide seat. The latch is set to a "T" shape structure, and the top of the latch extends to the top of the guide seat and is connected to the bottom end of the fan-shaped opening and closing knife, and the bottom end of the latch is welded and fixed to the limit plate at the top of the top rod.

[0009] Specifically, the size of the lock buckle is equal to the size of the lock slot.

[0010] Specifically, the radius of the fan-shaped end of the fan-shaped opening and closing knife is 1.2 times the radius of the fan-shaped end of the fan-shaped magnetic block, and the fan-shaped opening and closing knife and the grounding knife are equal in size.

[0011] Specifically, the height difference between the bottom end of the grounding knife and the bottom end of the fan-shaped opening and closing knife is equal to the height difference between the bottom of the lock buckle and the top of the lock slot.

[0012] Specifically, the electromagnetic plate is magnetically repelled from the sector-shaped magnetic block when powered on, and the magnetic force between the sector-shaped magnetic block and the electromagnetic plate is greater than the resilience of the spring.

[0013] 3. Beneficial effects

[0014] (1) The present invention adopts an auxiliary switch bending plate, a switch shaft, a fan-shaped magnetic block, a fan-shaped opening and closing knife, a grounding knife, an opening and closing door plate, a grounding switch wheel, a latch, a compression spring, a push rod, a lock and an interlocking plate. The rotation of the grounding switch wheel effectively drives the fan-shaped magnetic block, the fan-shaped opening and closing knife and the grounding knife arranged in opposite directions to rotate. The linkage latch squeezes the compression spring to push the push rod and the interlocking plate to rise and fall, thereby separating the lock from the interlocking plate, completing the interlocking opening and closing of the cabinet, and facilitating the locking, use and opening and maintenance of the cabinet.

[0015] (2) The present invention uses a shaft sleeve to slide the fan-shaped opening and closing knife onto the switch shaft, and provides a groove, a connecting rod, a spring and an electromagnetic plate between the fan-shaped magnetic block and the fan-shaped opening and closing knife. The vacuum circuit breaker can be opened and closed by rotating the switch wheel, and the electromagnetic plate can be powered on and off, so that a repulsive force is generated between the fan-shaped magnetic block and the fan-shaped opening and closing knife, or they are fitted together by the spring rebound force. The fan-shaped magnetic block and the fan-shaped opening and closing knife are effectively formed into an integral part to promote the lifting and lowering of the latch linkage interlocking plate, effectively avoiding the phenomenon that the interlocking mechanism is opened when the vacuum circuit breaker is in the open state but still powered on, effectively improving the safety of the cabinet use and operation, and reducing safety hazards.

[0016] (3) The present invention realizes the locking between the opening and closing door panel and the cabinet body by adopting an interlocking mechanism, which has a simple structure and is easy to operate. It can not only effectively prevent the inside of the cabinet from accidentally entering the energized interval, but also ensure that the interlocking mechanism is still in a locked state when the vacuum circuit breaker is in a short-circuit state, effectively ensuring the safe use of the electrical cabinet body and having strong practicality.

[0017] In summary, the "five-protection" door interlock mechanism of an electrical cabinet provided by the present invention can effectively open, close and lock the opening and closing door panels of the electrical cabinet through a simple interlock mechanism. The operation is convenient and easy to use and maintain the cabinet. The interlock plate can be effectively driven to open and close by powering on and off the fan-shaped opening and closing knife and the fan-shaped magnetic block, thereby effectively avoiding the phenomenon that the interlock mechanism is opened when the vacuum circuit breaker is still powered on in the open state, thereby improving the safety of cabinet use and operation and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the device of the present invention in an unlocked state;

[0019] Figure 2 For the present invention Figure 1 The enlarged side section structure diagram at A in the middle;

[0020] Figure 3 It is a schematic diagram of a partially enlarged structure of the device of the present invention in a locked state.

[0021] Figure numerals: 1. Auxiliary switch bending plate; 2. Switch shaft; 3. Fan-shaped magnetic block; 4. Fan-shaped opening and closing knife; 5. Grounding knife; 6. Guide seat; 7. Opening and closing door panel; 8. Grounding switch wheel; 9. Latch; 10. Compression spring; 11. Fixed seat; 12. Push rod; 13. Lock buckle; 14. Lock groove; 15. Interlocking plate; 16. Bushing; 17. Groove; 18. Connecting rod; 19. Spring; 20. Electromagnetic plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-3An embodiment of the present invention is as follows: an electrical cabinet "five-defense" door interlock mechanism, comprising an auxiliary switch bent plate 1, a switch shaft 2, an opening and closing door plate 7 and an interlock plate 15, wherein the auxiliary switch bent plate 1 is fixed to the inner wall of the cabinet, and one end of the auxiliary switch bent plate 1 is connected to a fixing seat 11, a top rod 12 is vertically slidably connected to the center of the fixing seat 11, and the top of the top rod 12 extends to the top of the fixing seat 11, and the top of the top rod 12 is connected to a limiting block, and a compression spring 10 is sleeved on the outer side of the top rod 12 between the limiting block and the fixing seat 11, and the two ends of the compression spring 10 are respectively welded and fixed to the bottom of the limiting block and the top of the fixing seat 11, the bottom of the top rod 12 extends to the bottom of the fixing seat 11 and is fixed with an interlock plate 15, and the interlock plate 15 is away from the top of one end of the top rod 12 A lock slot 14 is provided, and the opening and closing door panel 7 is connected to the cabinet at one end of the fixing seat 11. A grounding switch wheel 8 is rotatably fixed on the outer side wall of the opening and closing door panel 7, and a lock buckle 13 is connected to the inner wall of the opening and closing door panel 7 just above the lock slot 14. The size of the lock buckle 13 is equal to the size of the lock slot 14, so that the lock buckle 13 is stuck in the lock slot 14 after the mechanism is closed, effectively locking the opening and closing door panel 7, and facilitating the locking of the cabinet by the locked opening and closing door panel 7, so as to facilitate the use of the cabinet. A switch shaft 2 is horizontally connected to the inside of the cabinet on one side of the opening and closing door panel 7 above the auxiliary switch bent plate 1, and one end of the switch shaft 2 is fixedly connected to the grounding switch wheel 8, and a grounding knife 5 is mounted on the outer side wall of the switch shaft 2 near one end of the opening and closing door panel 7, and a power switch is connected to the inside of the cabinet below the grounding knife 5. , a fan-shaped opening and closing knife 4 is slidably connected to the outer wall of the switch shaft 2 on the side of the grounding knife 5 away from the closing door plate 7 through a shaft sleeve 16, and an electromagnetic plate 20 is fixed to the side of the fan-shaped opening and closing knife 4 away from the grounding knife 5, and the electromagnetic plate 20 is electrically connected to the grounding knife 5 through a wire, and a connecting rod 18 is provided inside the center of the upper and lower ends of the fan-shaped opening and closing knife 4 close to the electromagnetic plate 20, and a fan-shaped magnetic block 3 is set on the outer wall of the switch shaft 2 on the side of the fan-shaped opening and closing knife 4 close to the electromagnetic plate 20, and the setting direction of the fan-shaped magnetic block 3 and the fan-shaped opening and closing knife 4 is opposite to the grounding knife 5, and the center of the upper and lower ends of the fan-shaped magnetic block 3 close to the electromagnetic plate 20 is connected to the connecting rod 18, and one end of the two connecting rods 18 extends to the inside of the two grooves 17 respectively, and the connecting plug The fan-shaped magnetic blocks 3 on the outside of the rod 18 are all equipped with springs 19, and the other ends of the springs 19 are fixedly connected to the electromagnetic plates 20 on the outside of the grooves 17. When the electromagnetic plates 20 are powered on, they magnetically repel the fan-shaped magnetic blocks 3, and the magnetic force between the fan-shaped magnetic blocks 3 and the electromagnetic plates 20 is greater than the resilience of the springs 19, which facilitates the separation of the fan-shaped magnetic blocks 3 and the fan-shaped opening and closing blades 4 under the action of the repulsive magnets in the power-on state, thereby effectively avoiding the situation where the opening and closing door panels 7 are opened when the vacuum circuit breaker is still powered after the opening, effectively ensuring the locked state of the cabinet when powered on, and improving the safety of the cabinet. A guide seat 6 is fixed on the inner wall of the cabinet below the fan-shaped magnetic blocks 3 and the fan-shaped opening and closing blades 4, and the guide seat 6 is internally slidably connected with a latch 9, and the latch 9 is set to a "T"-shaped structure.The top of the latch 9 extends to the top of the guide seat 6 and contacts the bottom of the fan-shaped opening and closing knife 4. The radius of the fan-shaped end of the fan-shaped opening and closing knife 4 is 1.2 times the radius of the fan-shaped end of the fan-shaped magnetic block 3, and the fan-shaped opening and closing knife 4 and the grounding knife 5 are equal in size. The height difference between the bottom of the grounding knife 5 and the bottom of the fan-shaped opening and closing knife 4 is equal to the height difference between the bottom of the lock buckle 13 and the top of the lock groove 14. After the vacuum circuit breaker is opened, the grounding knife 5 is disconnected from the power switch, which is convenient for the fan-shaped opening and closing after the magnetism between the electromagnetic plate 20 and the fan-shaped magnetic block 3 disappears. Under the action of the rebound force of the spring 19, the knife 4 is connected to the sector magnet 3 through the connecting rod 18 to form a whole, so that after the sector magnet 3 and the sector end of the knife 4 are rotated to the top of the latch 9, the larger sector knife 4 contacts and squeezes the latch 9 to move the interlocking plate 15 up and down, thereby controlling the lock catch 13 to separate from the lock slot 14, realizing the opening of the mechanism, facilitating the opening of the door panel 7, and facilitating the maintenance of the internal components of the cabinet, and the bottom end of the latch 9 is welded and fixed to the limit plate at the top of the top rod 12.

[0024] Working principle: When in use, first, the switch shaft 2 is driven to rotate by rotating the grounding switch wheel 8, so that the grounding knife 5 is connected to the power switch. At this time, the vacuum circuit breaker is in the closed state, and the electromagnetic plate 20 is energized and generates a magnetic force that repels the magnetic field of the sector-shaped magnetic block 3, so that the spring 19 between the sector-shaped magnetic block 3 and the sector-shaped opening and closing knife 4 is stretched. Under the action of the repulsive force, the sector-shaped opening and closing knife 4 slides on the switch shaft 2 through the shaft sleeve 16 and slides to the outside of the latch 9, thereby driving the connecting rod 18 to separate from the groove 17. At this time, the sector-shaped magnetic block 3 and the sector-shaped opening and closing knife 4 They are two separate individuals, the fan-shaped opening and closing knife 4 is not in contact with the latch 9, and the compression spring 10 returns to its initial state, thereby driving the latch 9, the push rod 12 and the interlocking plate 15 to rise, so that the lock buckle 13 is stuck in the lock groove 14, and the opening and closing door panel 7 is locked by the interlocking plate 15, so that the cabinet is effectively locked, which is convenient for the closed use of the cabinet. When it is necessary to inspect the inside of the cabinet, the switch shaft 2 is driven to rotate by rotating the grounding switch wheel 8, so that the grounding knife 5 is separated from the power switch. At this time, the vacuum circuit breaker is in the open and power-off state, and the electromagnetic plate 20 is powered off. The fan-shaped opening and closing knife 4 slides instantaneously toward one end of the fan-shaped magnetic block 3 through the shaft sleeve 16 along the switch shaft 2 under the action of the rebound force of the spring 19, driving the connecting rod 18 to be inserted into the groove 17 so that the fan-shaped opening and closing knife 4 and the fan-shaped magnetic block 3 are clamped into a whole and placed above the latch 9. At the same time, as the switch shaft 2 rotates, the larger fan-shaped opening and closing knife 4 contacts and pushes the latch 9 to slide downward inside the guide seat 6, thereby squeezing the compression spring 10 and driving the ejector rod 12 to descend, thereby driving the interlocking plate 15 to descend through the ejector rod 12, so that the lock buckle 13 and The lock slot 14 is separated to realize the opening of the interlocking mechanism, which is convenient for opening the opening and closing door panel 7 and for inspecting the internal components of the cabinet. When the vacuum circuit breaker is in the open state and is still energized, the electromagnetic plate 20 is still magnetic. At this time, the relative position between the sector-shaped magnetic block 3 and the sector-shaped opening and closing knife 4 is the same as when the vacuum circuit breaker is in the closed state and energized, and is still divided into two separate individuals, which effectively ensures the locked state of the interlocking mechanism when the vacuum circuit breaker is still energized due to damage to the cabinet opening and closing, effectively improving the safety of cabinet use and operation and reducing safety hazards.

[0025] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. An electrical cabinet "five-protection" door interlocking mechanism, comprising an auxiliary switch bent plate (1), a switch shaft (2), an opening and closing door plate (7) and an interlocking plate (15), characterized in that: The auxiliary switch bent plate (1) is fixed on the inner wall of the cabinet, and one end of the auxiliary switch bent plate (1) is connected to a fixed seat (11), the center of the fixed seat (11) is vertically slidably connected to a push rod (12), and the top of the push rod (12) extends to the top of the fixed seat (11), the top of the push rod (12) is connected to a limit block, and a compression spring (10) is sleeved on the outer side of the push rod (12) between the limit block and the fixed seat (11), and the two ends of the compression spring (10) are respectively welded and fixed to the bottom of the limit block and the top of the fixed seat (11), the bottom of the push rod (12) extends to the bottom of the fixed seat (11) and is fixed with an interlocking plate (15), and the interlocking plate (15) is provided away from the top of one end of the push rod (12). A lock groove (14) is provided, the opening and closing door panel (7) is connected to the cabinet at one end of the fixing seat (11), a grounding switch wheel (8) is rotatably fixed on the outer wall of the opening and closing door panel (7), and a lock buckle (13) is connected to the inner wall of the opening and closing door panel (7) just above the lock groove (14), a switch shaft (2) is transversely connected to the cabinet on one side of the opening and closing door panel (7) above the auxiliary switch bent plate (1), one end of the switch shaft (2) is fixedly connected to the grounding switch wheel (8), and a grounding knife (5) is mounted on the outer wall of the switch shaft (2) near one end of the opening and closing door panel (7), the cabinet below the grounding knife (5) is connected to a power switch, and the grounding knife (5) is away from the outer side of the switch shaft (2) on one side of the closing door panel (7). A fan-shaped opening and closing knife (4) is slidably connected to the wall through a shaft sleeve (16), and an electromagnetic plate (20) is fixed on the side of the fan-shaped opening and closing knife (4) away from the grounding knife (5), and the electromagnetic plate (20) is electrically connected to the grounding knife (5) through a wire. The fan-shaped opening and closing knife (4) is close to the electromagnetic plate (20) and the inner part is provided with a connecting rod (18) at the center of the upper and lower ends of the side, and the fan-shaped opening and closing knife (4) is close to the electromagnetic plate (20). A fan-shaped magnetic block (3) is mounted on the outer wall of the switch shaft (2) on the side of the fan-shaped opening and closing knife (4) close to the electromagnetic plate (20), and the setting direction of the fan-shaped magnetic block (3) and the fan-shaped opening and closing knife (4) is opposite to that of the grounding knife (5). The fan-shaped magnetic block (3) is close to the electromagnetic plate (20) and the inner part is provided with a connecting rod (18) at the center of the upper and lower ends of the side. ), one end of the two connecting rods (18) respectively extends to the inside of the two grooves (17), and a spring (19) is mounted on the fan-shaped magnetic block (3) outside the connecting rod (18), and the other end of the spring (19) is fixedly connected to the electromagnetic plate (20) outside the groove (17), and a guide seat (6) is fixed on the inner wall of the cabinet below the fan-shaped magnetic block (3) and the fan-shaped opening and closing knife (4), and a latch (9) is slidably connected inside the guide seat (6), and the latch (9) is set as a "T"-shaped structure, and the top of the latch (9) extends to the top of the guide seat (6) and is connected to the bottom end of the fan-shaped opening and closing knife (4), and the bottom end of the latch (9) is welded and fixed to the limit plate at the top of the top rod (12); The size of the lock buckle (13) is equal to the size of the lock slot (14); The radius of the fan-shaped end of the fan-shaped opening and closing knife (4) is 1.2 times the radius of the fan-shaped end of the fan-shaped magnetic block (3), and the fan-shaped opening and closing knife (4) and the grounding knife (5) are equal in size.

2. According to claim 1, the "five-protection" door interlocking mechanism of an electrical cabinet is characterized in that: The height difference between the bottom end of the grounding knife (5) and the bottom end of the fan-shaped opening and closing knife (4) is equal to the height difference between the bottom of the lock buckle (13) and the top of the lock groove (14).

3. The "five-protection" door interlocking mechanism of an electrical cabinet according to claim 1 is characterized in that: The electromagnetic plate (20) is magnetically repelled from the sector-shaped magnetic block (3) when powered, and the magnetic force between the sector-shaped magnetic block (3) and the electromagnetic plate (20) is greater than the resilience of the spring (19).

Images