Safety interlocking device for switchgear

Abstract

Disclosed in the present invention is a safety interlocking device for a switchgear. The safety interlocking device comprises an interlocking base, wherein a latch is slidably arranged on a latch guide limiting assembly, and the latch guide limiting assembly is fixedly arranged inside the interlocking base, one side of the latch being provided with a first recess; a first locking pin is fixedly connected to one end of a guide block, the guide block engages with a cam, the cam is fixedly arranged on one end of a transmission shaft, and the transmission shaft is rotatably arranged on the interlocking base; a first guide sleeve is fixedly arranged inside the interlocking base, a first guide plate is fixed in the interlocking base, and the guide block is slidably arranged in the first guide sleeve; a first reset spring is sleeved on the first locking pin, the first reset spring is in contact with the first guide plate, and the first reset spring is in contact with the guide block; and a first guide hole for engaging with the first locking pin is provided in the middle of the first guide plate, and a lock hole for engaging with the latch is provided in the interlocking base. By means of the device, the safety of an operator can be effectively ensured.

Description

A safety interlock device for switch cabinet Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and in particular to a safety interlocking device for a switch cabinet. Background Art

[0002] As highly reliable, maintenance-free, and environmentally resistant fully enclosed switchgear becomes increasingly popular, its share of the distribution network system market continues to grow year by year. Reducing operational failures and effectively protecting construction workers are becoming increasingly important. Currently, switchgear in operation is still manually operated, which creates the potential for accidents involving contact with live parts due to misoperation. Most switchgear failures occur at cable splices. Due to discrepancies between manufacturer designs and national standards for cables and cable bushings, or due to inadequate process control during the installation of cable accessories, poor contact can lead to localized high temperatures and severe burns in cable accessories. This poses a severe challenge to the operational continuity of the switchgear and the safety of on-site personnel.

[0003] Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a safety interlocking device for a switch cabinet.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] A safety interlock device for a switch cabinet comprises an interlock base, a latch, a latch guide limit assembly, a cam, a transmission shaft, a first guide sleeve, a first guide plate, a first locking pin, a guide block and a first return spring, wherein the latch is slidably arranged on the latch guide limit assembly, the latch guide limit assembly is fixedly arranged inside the interlock base, a first groove is provided on the side surface of the latch that cooperates with one end of the first locking pin, the other end of the first locking pin is fixedly connected to one end of the guide block, one end of the guide block cooperates with the cam, the cam is fixedly arranged on one end of the transmission shaft, and the transmission shaft is rotatably arranged on the interlock base The first guide plate is fixedly provided inside the interlocking base, and the first guide plate is provided close to the side of the latch. The guide block is slidably provided in the first guide sleeve, and the first return spring in a compressed state is sleeved on the first locking pin, and one end of the first return spring contacts the first guide plate, and the other end of the first return spring contacts the guide block. A first guide hole that cooperates with the first locking pin is provided in the middle of the first guide plate, and a lock hole that passes through and cooperates with the latch is provided on the interlocking base.

[0007] Furthermore, the latch guide limit assembly includes a second guide sleeve and a limit block, the latch is slidably arranged in the second guide sleeve, the second guide sleeve is fixedly arranged inside the interlocking base, a limit groove is provided on the inner wall of the second guide sleeve, and the limit block is fixedly arranged on the side wall of the latch and cooperates with the limit groove.

[0008] Furthermore, a protection component is included, which is fixedly arranged in the interlocking base and cooperates with the latch.

[0009] Furthermore, the protective assembly includes a third guide sleeve, a second guide plate, a third guide plate, a second locking pin, a second return spring, a magnetic block and an electromagnetic component. The third guide sleeve is fixedly arranged in the interlocking base, the second guide plate and the third guide plate are both fixedly arranged in the third guide sleeve, and the second guide plate is arranged close to the side of the latch, one end of the second locking pin is slidably arranged on the second guide plate, the middle part of the second guide plate is provided with a second guide hole that cooperates with the second locking pin, the other end of the second locking pin is slidably arranged on the third guide plate, the middle part of the third guide plate is provided with a third guide hole that cooperates with the second locking pin, the side surface of the latch is provided with a second groove that cooperates with the end of the second locking pin, the middle part of the second locking pin is fixedly provided with a magnetic block, the magnetic block is arranged between the second guide plate and the third guide plate, the second locking pin is sleeved with the second return spring, one end of the second return spring contacts the second guide plate, and the other end of the second return spring contacts the magnetic block, the electromagnetic component is fixedly arranged in the third guide sleeve, and the electromagnetic component is arranged between the magnetic block and the latch.

[0010] Furthermore, the first groove and the second groove are symmetrically arranged on both sides of the latch.

[0011] Furthermore, the first locking pin is arranged perpendicular to the latch pin, and the second locking pin is arranged perpendicular to the latch pin.

[0012] Furthermore, the ends of the first locking pin and the second locking pin are both arc-shaped end heads, and the first groove and the second groove are both arc-shaped grooves that match the arc-shaped end heads.

[0013] Furthermore, it also includes a manual rod and a fourth guide sleeve, the manual rod is slidably arranged in the fourth guide sleeve, the two baffles are fixedly arranged on the manual rod, the fourth guide sleeve is arranged between the two baffles, the fourth guide sleeve is fixedly arranged in the interlocking base, and the interlocking base is provided with a fourth guide hole that cooperates with the manual rod, and the manual rod is arranged parallel to the pin.

[0014] Furthermore, both ends of the latch extend to the outside of the interlocking base, and a handle for driving the latch to move is fixedly provided on one end of the latch.

[0015] Furthermore, the lock hole is a square hole, and the cross-section of the latch is square and matches the square hole.

[0016] The beneficial effects of the present invention are:

[0017] 1) In this technical solution, when the switchgear in the switch cabinet is fully opened, the drive shaft drives the cam to rotate, causing the first locking pin to disengage from the first groove. The latch can then be removed, ensuring the switch cabinet door can be opened safely. When the latch is not inserted into the cabinet door, the cam cannot push the first locking pin into the first groove. The cabinet door cannot be closed, and the switchgear cannot be closed, thereby better protecting the safety of the operator.

[0018] 2) In this technical solution, the protective component is connected to the energized cable in the switch cabinet. When powered on, the second locking pin is inserted into the second groove, and the pin cannot be pulled out at this time, effectively protecting the safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the connection structure of the device when it is in a locked state;

[0020] Figure 2 is a schematic diagram of the connection structure of the device when it is in an open state;

[0021] FIG3 is a schematic diagram of the AA cross-sectional connection structure of FIG1 ;

[0022] In the figure, 1-interlocking housing, 2-latch, 3-cam, 4-drive shaft, 5-first guide sleeve, 6-first guide plate, 7-first locking pin, 8-guide block, 9-first return spring, 10-first groove, 11-lock hole, 12-second guide sleeve, 13-limiting block, 14-limiting groove, 15-third guide sleeve, 16-second guide plate, 17-third guide plate, 18-second locking pin, 19-second return spring, 20-magnetic block, 21-electromagnetic component, 22-second guide hole, 23-third guide hole, 24-second groove, 25-handle, 26-first guide hole, 27-manual lever, 28-fourth guide sleeve, 29-fourth guide hole, 30-baffle, 31-switch cabinet, 32-cabinet door. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0024] Referring to Figures 1 to 3, the present invention provides a technical solution:

[0025] A safety interlock device for a switch cabinet includes an interlock base 1, a latch 2, a latch guide limit assembly, a cam 3, a transmission shaft 4, a first guide sleeve 5, a first guide plate 6, a first locking pin 7, a guide block 8 and a first return spring 9. The latch 2 is slidably arranged on the latch guide limit assembly, and the latch guide limit assembly is fixedly arranged inside the interlock base 1. A first groove 10 is provided on the side of the latch 2 to cooperate with one end of the first locking pin 7. The other end of the first locking pin 7 is fixedly connected to one end of the guide block 8. One end of the guide block 8 cooperates with the cam 3. The cam 3 is fixedly arranged on one end of the transmission shaft 4. The transmission shaft 4 is rotatably arranged on the interlock base. The first guide sleeve 5 is fixedly mounted on the lock base 1 and extends out of the side of the interlock base 1 at the other end. A first guide plate 6 is fixedly mounted inside the interlock base 1 and is positioned near the latch 2. A guide block 8 is slidably mounted within the first guide sleeve 5. A compressed first return spring 9 is sleeved on the first locking pin 7, with one end of the first return spring 9 contacting the first guide plate 6 and the other end of the first return spring 9 contacting the guide block 8. A first guide hole 26 is provided in the middle of the first guide plate 6, which cooperates with the first locking pin 7. A lock hole 11 is provided through the interlock base 1 and cooperates with the latch 2. The first locking pin 7 is positioned perpendicular to the latch 2. The lock hole 11 is a square hole, and the latch 2 has a square cross-section and cooperates with the square hole. Among them, the interlocking base 1 is fixed on the switch cabinet 31, and a cabinet door 32 is provided on the switch cabinet 31. The cabinet door 32 is provided with a latch hole that matches one end of the latch 2. After the latch 2 is pulled out of the latch hole, the manual lever 27 is opened to open the cabinet door 32. The function of the latch guide limit assembly is to limit the distance that the latch 2 moves. The transmission shaft 4 is fixedly connected to the switch device set in the switch cabinet 31. The switch device will rotate during the opening and closing process, thereby driving the transmission shaft 4 to rotate. When the transmission shaft 4 rotates, it drives the cam 3 to rotate. The cam 3 drives the first locking pin 7 to move through the guide block 8. In the prior art, the angle of rotation of the switch device during the opening and closing process is generally 80 to 120 degrees, so the rotation angle of the transmission shaft 4 is also 80 to 120 degrees. During the closing process, first close the cabinet door 32, then insert the manual rod 27 into place, then insert the latch 2 into the latch hole on the cabinet door 32, start the switch device to drive the transmission shaft 4 to rotate, and when the transmission shaft 4 rotates, the raised portion of the cam 3 gradually acts on the guide block 8, and the first locking pin 7 is driven to gradually move forward through the guide block 8, and the end of the first locking pin 7 is gradually inserted into the first groove 10. When the raised portion of the cam 3 acts on the guide block 8, the end of the first locking pin 7 directly falls into the first groove 10, and the latch 2 cannot move. When the latch 2 is misplaced, the end of the first locking pin 7 cannot act on the first groove 10. At this time, the first locking pin 7 and the guide block 8 restrict the cam 3 from rotating further. When the cam 3 cannot rotate into place, the switch device cannot be closed, thereby playing a protective role in the closing process.During the opening process, the switch device is first opened. When the switch device is opened, the transmission shaft 4 rotates in the opposite direction, which drives the cam 3 to rotate. The raised portion of the cam 3 no longer contacts the guide block 8, and the arc portion of the cam 3 contacts the guide block 8. At this time, the first locking pin 7 is disengaged from the first groove 10 under the action of the first reset spring 9. The latch 2 can then be pulled out, causing the latch 2 to disengage from the latch hole on the cabinet door 32. The manual lever 27 is then manually pulled out from the cabinet door 32, and the cabinet door 32 can now be opened, thus providing protection during the opening process. The distance from the arc portion of the cam 3 to the axis of the transmission shaft 4 is smaller than the distance from the raised portion of the cam 3 to the axis of the transmission shaft 4. The first guide plate 6 and the guide block 8 not only guide the first locking pin 7, but also serve as the action point of the first reset spring 9. The interlocking base 1 can be a box body or a plate, and the first guide sleeve 5, the second guide sleeve 12, the third guide sleeve 15 and the fourth guide sleeve 28 are all arranged in the box body; the interlocking base 1 can also be a mounting plate, and an inner groove is provided in the middle of the mounting plate, and the first guide sleeve 5, the second guide sleeve 12, the third guide sleeve 15 and the fourth guide sleeve 28 are all arranged in the inner groove.

[0026] In some embodiments, the latch guide and limit assembly includes a second guide sleeve 12 and a limit block 13. The latch 2 is slidably disposed within the second guide sleeve 12. The second guide sleeve 12 is fixedly disposed within the interlocking base 1. A limit groove 14 is disposed on the inner wall of the second guide sleeve 12. The limit block 13 is fixedly disposed on the side wall of the latch 2 and cooperates with the limit groove 14. The limit block 13 is provided to prevent the latch 2 from disengaging from the interlocking base 1 during the sliding process and also facilitates positioning. When the limit block 13 contacts the inner end of the limit groove 14, the end of the first locking pin 7 can be inserted into the first groove 10. When the limit block 13 contacts the outer end of the limit groove 14, the opening and closing process of the cabinet door 32 is no longer restricted by the latch 2.

[0027] In some embodiments, a protective component is further included, which is fixedly arranged in the interlocking base 1 and cooperates with the latch 2. The protective component includes a third guide sleeve 15, a second guide plate 16, a third guide plate 17, a second locking pin 18, a second return spring 19, a magnetic block 20 and an electromagnetic component 21. The third guide sleeve 15 is fixedly arranged in the interlocking base 1, and the second guide plate 16 and the third guide plate 17 are both fixedly arranged in the third guide sleeve 15, and the second guide plate 16 is arranged near the side of the latch 2. One end of the second locking pin 18 is slidably arranged on the second guide plate 16, and a second guide hole 22 that cooperates with the second locking pin 18 is provided in the middle of the second guide plate 16. The other end of the second locking pin 18 is slidably arranged on the third guide plate 17. A third guide hole 23 is provided in the middle of the guide plate 17, which cooperates with the second locking pin 18. A second groove 24 is provided on the side of the latch 2, which cooperates with the end of the second locking pin 18. A magnetic block 20 is fixedly provided in the middle of the second locking pin 18 and is disposed between the second guide plate 16 and the third guide plate 17. A second return spring 19 is sleeved on the second locking pin 18, one end of which contacts the second guide plate 16, and the other end of which contacts the magnetic block 20. An electromagnetic component 21 is fixedly provided in the third guide sleeve 15 and is disposed between the magnetic block 20 and the latch 2. The second locking pin 18 is disposed perpendicular to the latch 2. Among them, the magnetic block 20 is an iron plate, and the electromagnetic component 21 is a prior art. The electromagnetic component 21 is used to determine whether the switch cabinet 31 is charged. When the electromagnetic component 21 is electrically connected to the switch cabinet 31, when the switch cabinet 31 is energized, the electromagnetic component 21 will attract the magnetic block 20 and make contact. The magnetic block 20 compresses the second return spring 19 so that the end of the second locking pin 18 acts in the second groove 24. At this time, the bolt 2 cannot be pulled out and the cabinet door 32 on the switch cabinet 31 cannot be opened, thereby playing a protective role. When the switch cabinet 31 is well grounded and not energized, the electromagnetic component 21 will not magnetically attract the block 20, and the end of the second locking pin 18 will not act in the second groove 24, so the bolt 2 can be pulled out smoothly.

[0028] In some embodiments, the present invention further includes a manual rod 27 and a fourth guide sleeve 28. The manual rod 27 is slidably disposed within the fourth guide sleeve 28. Two baffles 30 are fixedly disposed on the manual rod 27. The fourth guide sleeve 28 is disposed between the two baffles 30. The fourth guide sleeve 28 is fixedly disposed within the interlock base 1. The interlock base 1 is provided with a fourth guide hole 29 that cooperates with the manual rod 27. The manual rod 27 is disposed parallel to the latch 2. The manual rod 27 has the same function as the latch 2, both of which secure the cabinet door 32 to the switch cabinet 31. In actual use, during the closing process, the cabinet door 32 is first secured to the switch cabinet 31 via the manual rod 27, and then secured to the switch cabinet 31 via the latch 2. After the latch 2 is in place, the closing operation is performed. During the opening process, the opening operation is first performed, and then the latch 2 is pulled out to secure the cabinet door 32. The manual rod 27 is then pulled out from the cabinet door 32, and finally, the cabinet door 32 is opened. This operation method effectively ensures the safety of the operator. The effect of baffle plate 30 is to prevent that manual rod 27 breaks away from the 4th guide sleeve 28. Cabinet door 32 is also provided with the jack that cooperates with manual rod 27.

[0029] In some embodiments, the first groove 10 and the second groove 24 are symmetrically arranged on both sides of the latch 2. The first groove 10 and the second groove 24 can also be arranged on the same side. In this case, the first guide sleeve 5 and the third guide sleeve 15 are also arranged on the same side of the latch 2.

[0030] In some embodiments, the ends of the first locking pin 7 and the second locking pin 18 are both arc-shaped ends, and the first groove 10 and the second groove 24 are both arc-shaped grooves that match the arc-shaped ends. Specifically, the first locking pin 7 and the second locking pin 18 can both adopt V-shaped ends, and the first groove 10 and the second groove 24 are V-shaped grooves that match the V-shaped ends; the first locking pin 7 and the second locking pin 18 can both adopt square ends, and the first groove 10 and the second groove 24 are square grooves that match the square ends.

[0031] In some embodiments, both ends of the latch 2 extend outside the interlocking base 1, and a handle 25 is fixedly mounted on one end of the latch 2 for moving the latch 2. The handle 25 facilitates manual movement of the latch 2 and facilitates opening or closing the cabinet door 32. The handle 25 and the cabinet door 32 are located on either side of the first guide sleeve 5.

[0032] The foregoing description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Rather, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant field. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the appended claims.

Claims

1. A safety interlock device for a switch cabinet, characterized in that: The invention comprises an interlocking base (1), a latch (2), a latch guide and limiting assembly, a cam (3), a transmission shaft (4), a first guide sleeve (5), a first guide plate (6), a first locking pin (7), a guide block (8) and a first reset spring (9); the latch (2) is slidably arranged on the latch guide and limiting assembly; the latch guide and limiting assembly is fixedly arranged inside the interlocking base (1); a first groove (10) is arranged on the side surface of the latch (2) and is matched with one end of the first locking pin (7); the other end of the first locking pin (7) is fixedly connected to one end of the guide block (8); one end of the guide block (8) is matched with the cam (3); the cam (3) is fixedly arranged on one end of the transmission shaft (4); the transmission shaft (4) is rotatably arranged on the interlocking base (1) and the other end The first guide sleeve (5) is fixedly arranged inside the interlocking base (1) and the first guide plate (6) is fixedly arranged inside the interlocking base (1). The first guide plate (6) is arranged close to the side of the latch pin (2). The guide block (8) is slidably arranged in the first guide sleeve (5). The first return spring (9) in a compressed state is sleeved on the first locking pin (7). One end of the first return spring (9) contacts the first guide plate (6) and the other end of the first return spring (9) contacts the guide block (8). A first guide hole (26) cooperating with the first locking pin (7) is arranged in the middle of the first guide plate (6). A locking hole (11) penetrating therethrough and cooperating with the latch pin (2) is arranged on the interlocking base (1).

2. A safety interlocking device for a switch cabinet according to claim 1, characterized in that: The latch pin guide and limit assembly comprises a second guide sleeve (12) and a limit block (13); the latch pin (2) is slidably arranged in the second guide sleeve (12); the second guide sleeve (12) is fixedly arranged inside the interlocking base (1); a limit groove (14) is arranged on the inner wall of the second guide sleeve (12); the limit block (13) is fixedly arranged on the side wall of the latch pin (2) and cooperates with the limit groove (14).

3. A safety interlocking device for a switch cabinet according to claim 1 or 2, characterized in that: It also comprises a protection component, which is fixedly arranged in the interlocking base (1) and cooperates with the latch (2).

4. A safety interlocking device for a switch cabinet according to claim 3, characterized in that: The protection component comprises a third guide sleeve (15), a second guide plate (16), a third guide plate (17), a second locking pin (18), a second return spring (19), a magnetic block (20) and an electromagnetic component (21); the third guide sleeve (15) is fixedly arranged in the interlocking base (1); the second guide plate (16) and the third guide plate (17) are both fixedly arranged in the third guide sleeve (15); and the second guide plate (16) is arranged close to the side of the latch pin (2); one end of the second locking pin (18) is slidably arranged on the second guide plate (16); a second guide hole (22) cooperating with the second locking pin (18) is arranged in the middle of the second guide plate (16); the other end of the second locking pin (18) is slidably arranged on the third guide plate (17); and the third guide plate ( A third guide hole (23) cooperating with the second locking pin (18) is provided in the middle of the plug (17); a second groove (24) cooperating with the end of the second locking pin (18) is provided on the side of the plug (2); a magnetic block (20) is fixedly provided in the middle of the second locking pin (18); the magnetic block (20) is arranged between the second guide plate (16) and the third guide plate (17); the second locking pin (18) is sleeved with the second return spring (19); one end of the second return spring (19) contacts with the second guide plate (16); the other end of the second return spring (19) contacts with the magnetic block (20); the electromagnetic component (21) is fixedly provided in the third guide sleeve (15); the electromagnetic component (21) is arranged between the magnetic block (20) and the plug (2).

5. A safety interlocking device for a switch cabinet according to claim 4, characterized in that: The first groove (10) and the second groove (24) are symmetrically arranged on both sides of the latch (2).

6. A safety interlocking device for a switch cabinet according to claim 4 or 5, characterized in that: The first locking pin (7) is arranged perpendicularly to the latch pin (2), and the second locking pin (18) is arranged perpendicularly to the latch pin (2).

7. A safety interlocking device for a switch cabinet according to claim 4 or 5, characterized in that: The ends of the first locking pin (7) and the second locking pin (18) are both in contact with an arc-shaped end head, and the first groove (10) and the second groove (24) are both arc-shaped grooves that match the arc-shaped end head.

8. A safety interlocking device for a switch cabinet according to claim 1 or 2, characterized in that: The invention also comprises a manual rod (27) and a fourth guide sleeve (28), wherein the manual rod (27) is slidably arranged in the fourth guide sleeve (28), two baffles (30) are fixedly arranged on the manual rod (27), the fourth guide sleeve (28) is arranged between the two baffles (30), the fourth guide sleeve (28) is fixedly arranged in the interlocking base (1), and a fourth guide hole (29) cooperating with the manual rod (27) is arranged on the interlocking base (1), and the manual rod (27) is arranged parallel to the latch (2).

9. A safety interlocking device for a switch cabinet according to claim 1 or 2, characterized in that: Both ends of the latch pin (2) extend to the outside of the interlocking base (1), and a handle (25) for driving the latch pin (2) to move is fixedly provided on one end of the latch pin (2).

10. A safety interlocking device for a switch cabinet according to claim 1 or 2, characterized in that: The lock hole (11) is a square hole, and the cross section of the latch pin (2) is square and matches the square hole.

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