Multi-door safety interlocking mechanism of electrical control cabinet

Abstract

The invention relates to a multi-door safety interlocking mechanism of an electrical control cabinet, and belongs to the field of multi-door interlocking electrical, the multi-door safety interlocking mechanism comprises a push rod, a first spring, a plurality of linkage pieces and a plurality of locking pieces, the linkage pieces are in one-to-one correspondence with cabinet doors, the locking pieces are in one-to-one correspondence with the cabinet doors, and the push rod is connected with the first spring; when the door is closed, the linkage piece is used for driving the push rod to move to enable the first spring to store energy, and when the door is opened, the linkage piece relieves limiting of the push rod to enable the first spring to release energy. When the cabinet door corresponding to any linkage piece is in an open state, the adjacent previous linkage piece limits the closing of the cabinet door corresponding to the linkage piece, and when the cabinet door corresponding to any linkage piece is in a closed state, the linkage piece pushes the push rod to move, so that the adjacent previous linkage piece relieves the closing limitation of the cabinet door corresponding to the linkage piece. And meanwhile, a plurality of locking pieces behind the cabinet door are controlled to be in a locking state, so that a plurality of cabinet doors are sequentially opened and closed according to a preset sequence. The cabinet door can be opened and closed in sequence, and the cabinet door can be prevented from being opened and closed at will.

Description

Technical Field

[0001] This application relates to the field of multi-door interlocking electrical technology, and in particular to a multi-door safety interlocking mechanism for an electrical control cabinet. Background Technology

[0002] Multi-door control cabinets are core equipment in industrial control, power systems, and automation. They are cabinets used to centrally install and protect internal wiring or components and other control equipment. Multi-door control cabinets have multiple independently openable doors to adapt to the operation and maintenance needs of complex scenarios. The flexible multi-door structure also improves the efficiency of equipment installation, wiring, and troubleshooting.

[0003] However, existing conventional multi-door control cabinets lack the connection between the cabinet doors and the internal power switches. The control of the internal power supply and the opening of the cabinet doors are independent of each other. The cabinet doors can be opened or closed at will. When the equipment inside the control cabinet is energized, all cabinet doors can still be opened at will. Workers may accidentally touch the internal wiring, terminals or components while the equipment is energized, causing safety accidents and equipment short circuits. Or, if a cabinet door is not closed properly, the power supply to the internal equipment can still be turned on normally, creating a safety hazard in subsequent operations. Workers may come into contact with live parts without any precautions, which can easily cause electric shock accidents. Summary of the Invention

[0004] In order to enable the sequential opening and closing of cabinet doors and prevent the doors from being opened and closed arbitrarily, this application provides a multi-door safety interlock mechanism for electrical control cabinets.

[0005] This application provides a multi-door safety interlock mechanism for an electrical control cabinet. The technical solution adopted is as follows: A multi-door safety interlocking mechanism for an electrical control cabinet includes a push rod, a first spring, multiple linkage components, and multiple locking components. Each linkage component corresponds to a cabinet door, each locking component corresponds to a cabinet door, and the push rod is connected to the first spring. When the door is closed, the linkage is used to drive the push rod to move so that the first spring stores energy; when the door is opened, the linkage releases the limit on the push rod so that the first spring releases energy. When the cabinet door corresponding to any of the linkage components is in the open state, the adjacent preceding linkage component restricts its corresponding cabinet door from closing. When the cabinet door corresponding to any of the linkage components is in the closed state, the linkage component pushes the push rod to move, so that the adjacent preceding linkage component releases the closing restriction of its corresponding cabinet door, and at the same time controls the locking components after it to be in the locking state, thereby realizing that multiple cabinet doors open and close in sequence according to a preset order.

[0006] By adopting the above technical solution, a sequential control mechanism is formed through the cooperation of push rods, springs, linkages, and locking components. This effectively prevents cabinet doors from being opened and closed arbitrarily, ensuring that multiple cabinet doors can only be opened and closed sequentially according to a preset order. That is, if the previous cabinet door is not opened, the next cabinet door cannot be opened, or if the next cabinet door is not closed, the previous cabinet door cannot be closed. The close cooperation of the linkages and locking components specifies the opening sequence, preventing staff from arbitrarily opening cabinet doors to expose internal components and accidentally touching circuits, thus avoiding safety accidents and enhancing safety protection.

[0007] Optionally, there are three linkage components and three locking components, with the first locking component controlled by the main power switch; When the main power switch is turned on, the first, second, and third locking components are all in a locked state. When the main power switch is turned off, the first locking component is in an unlocked state, while the second and third linkage components are in a locked state. The cabinet door corresponding to the first linkage component can be opened. When the cabinet door corresponding to the first linkage component is opened, the first linkage component releases the first spring, the second locking component is in an unlocked state, and the third locking component remains in a locked state. The cabinet door corresponding to the second linkage component can be opened. When the cabinet door corresponding to the second linkage component is opened, the second linkage component releases the first spring again, the third locking component is in an unlocked state, and the cabinet door corresponding to the third linkage component can be opened. When the cabinet door corresponding to the third linkage is opened, the first and second linkages restrict the corresponding cabinet door from closing. When the cabinet door corresponding to the third linkage is closed, the third linkage pushes the push rod to move and store energy, causing the second locking member to release the closing restriction of its corresponding cabinet door. The first linkage remains in the restricted closing state. When the cabinet door corresponding to the second linkage is closed, the second linkage pushes the push rod to move and store energy, causing the first locking member to release the closing restriction of its corresponding cabinet door. After the cabinet door corresponding to the first linkage is closed, the main power switch can be turned on.

[0008] By adopting the above technical solution, all cabinet doors cannot be opened when the main power is on. The main power must be turned off first, and then the cabinet doors must be opened in the order of the first, second, and third doors. The main power cannot be turned on when any cabinet door is not closed. The power can only be turned on after the cabinet doors are closed in the order of the third, second, and first doors. This avoids the risk of short circuits and electric shocks caused by staff accidentally touching the equipment when the equipment inside the cabinet is energized, and improves the safety and reliability of the equipment.

[0009] Optionally, the linkage includes a door closing insert block and a push plate. The door closing insert block is fixedly mounted on the push rod, and the push plate is connected to the cabinet door handle. A guide surface is provided at one end of the push plate near the door closing insert block. When the guide surface is directly below the door closing insert block, the cabinet door handle drives the push plate, causing the guide surface to push the door closing insert block and move the push rod. When the top of the push plate is below the door closing insert block, the door closing insert block abuts against the push plate, restricting the corresponding cabinet door from closing.

[0010] By adopting the above technical solution, the guide surface on the push plate can smoothly push the door closing plug block to move, and drive the push rod to move and compress the spring, ensuring that the subsequent cabinet doors can be opened smoothly. When the top of the push plate abuts against the door closing plug block, it ensures that multiple cabinet doors can be closed in sequence.

[0011] Optionally, the linkage includes a disassembly plate, the door closing insert block is mounted on the disassembly plate, the door closing insert block is detachably connected, and the disassembly plate is provided with multiple sets of threaded holes, which are used to adjust the position of the door closing insert block as needed.

[0012] By adopting the above technical solution, the position of the door closing insert baffle on the disassembly plate can be flexibly adjusted according to the needs, thereby enabling the cabinet doors to open and close in different sequences, or for only some of the multiple cabinet doors to open and close in a preset sequence. For example, if four cabinet doors are opened in the order of the first, third, and fourth cabinet doors, the position of the door closing insert baffle corresponding to the first and second cabinet doors needs to be adjusted, which improves the flexibility of the interlocking mechanism and the adaptability to usage scenarios.

[0013] Optionally, the locking component includes a fixed baffle and a movable plate. The fixed baffle is fixedly mounted on the push rod, and the movable plate is connected to the cabinet door handle. When the cabinet door corresponding to the locking component is closed, the movable plate is locked above the fixed baffle, thus restricting the movement of the cabinet door handle and locking it. When the fixed baffle is separated from the movable plate, the cabinet door handle can move and unlock it.

[0014] By adopting the above technical solution, when the cabinet door is closed, the cooperation between the fixed baffle and the movable plate makes the cabinet door reliably locked, and pulling the cabinet door handle will not open the cabinet door, thus preventing the cabinet door from being pulled open at will and causing safety accidents.

[0015] Optionally, a first fixed back plate is also included, on which the push plate and the moving plate are fixedly mounted. The first fixed back plate has a first through groove located on the side of the first fixed back plate facing the cabinet door. A second fixed back plate is fixedly mounted on the first fixed back plate, which is used to fix the push plate and the moving plate on the cabinet door. The second fixed back plate has a second through groove facing the first fixed back plate. The first through groove and the second through groove are opposite to each other and together form a mounting hole for connection with a cabinet door latch.

[0016] By adopting the above technical solution, the first fixed back plate fixes the push plate and the moving plate together, realizing the linkage effect of the linkage component and the locking component, which improves the reliability of sequential opening and closing of the door. The second fixed back plate fixes the push plate and the moving plate to the cabinet door, and at the same time, the cabinet door pin passes through the mounting hole, so that the push plate and the moving plate are firmly installed on the cabinet door, avoiding the push plate and the moving plate from falling off the cabinet door and failing, thus improving the efficient linkage effect of the interlocking mechanism.

[0017] Optionally, at least two limiting adjustment blocks are provided on the push rod, and the limiting adjustment blocks are located at both ends of the push rod.

[0018] By adopting the above technical solution, the two limit adjustment blocks limit the push rod on both sides, ensuring that the push rod is stably assembled on the cabinet door, preventing the push rod from slipping off the end, and avoiding the push rod from falling off.

[0019] Optionally, the push rod is provided with a plurality of fixed seat mounting plates, which are used to fix and limit the movement of the push rod; At least one of the limiting adjustment blocks and its adjacent fixed base mounting plate are provided with the first spring, the first spring is sleeved on the push rod, and the first spring is used to drive the push rod to reset.

[0020] By adopting the above technical solution, the fixed mounting plate fixes the push rod on the cabinet door. At the same time, the fixed mounting plate provides positioning and movement guidance for the push rod. The first spring can push the limit adjustment block and drive the push rod to reset after the cabinet door is opened, ensuring that the interlocking mechanism always operates effectively.

[0021] Optionally, a fixing plate is fixedly provided on the side of the fixing baffle away from the moving plate, one end of the fixing plate is fitted with the fixing baffle, and a fixing sleeve is fixedly provided on the other end of the fixing plate, with the top of the fixing sleeve fixedly connected to the fixing baffle. A fixed cylinder is fixedly mounted on the movable plate, and the fixed cylinder is positioned facing the fixed sleeve. When the locking member is in the locked state, the fixed cylinder is located inside the fixed sleeve. When the locking member is released from the locked state, the fixed cylinder separates from the fixed sleeve.

[0022] By adopting the above technical solution, when the cabinet door corresponding to the locking component is closed, the positioning cylinder is located in the positioning sleeve, which plays a double locking role, enhances the structural rigidity of the locking component, and prevents the fixed baffle and moving plate from deforming or even breaking when the door handle is pulled without opening the door in sequence, causing the interlocking mechanism to fail.

[0023] Optionally, a second spring is fixedly installed inside the positioning sleeve. The second spring is used to assist in pushing the fixed cylinder to move. The positioning sleeve is provided with a positioning groove. The fixed cylinder is provided with a positioning protrusion. When the locking member is in the locked state, the fixed cylinder is located inside the positioning sleeve and compresses the second spring, and the positioning protrusion is located inside the positioning groove. When the locking member is released from the locked state, the second spring assists in pushing the positioning cylinder to separate from the positioning sleeve.

[0024] By adopting the above technical solution, when the cabinet door corresponding to the locking component is closed, the positioning protrusion is inserted into the positioning groove, effectively preventing the fixed baffle and the moving plate from shaking. When the cabinet door corresponding to the locking component is unlocked, the second spring assists in pushing the fixed cylinder to move out of the positioning sleeve more smoothly.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the cooperation of push rods, springs, linkages, and locking components, a sequential control mechanism is formed, effectively preventing the cabinet doors from being opened and closed arbitrarily. Multiple cabinet doors can only be opened and closed sequentially according to a preset order. That is, if the previous cabinet door is not opened, the next cabinet door cannot be opened, or if the next cabinet door is not closed, the previous cabinet door cannot be closed. The close cooperation of the linkages and locking components specifies the opening sequence, preventing staff from opening cabinet doors arbitrarily, exposing internal components, or accidentally touching circuits and causing safety accidents, thus enhancing safety protection.

[0026] 2. When the main power is on, all cabinet doors cannot be opened. The main power must be turned off first, and then the cabinet doors must be opened in the order of the first, second, and third doors. The main power cannot be turned on if any cabinet door is not closed. The power can only be turned on after the cabinet doors are closed in the order of the third, second, and first doors. This avoids the risk of short circuits and electric shocks caused by personnel accidentally touching the equipment when the equipment inside the cabinet is energized, thus improving the safety and reliability of the equipment.

[0027] 3. The guide surface on the push plate can smoothly push the door closing plug block to move, and drive the push rod to move and compress the spring, ensuring that the subsequent cabinet doors can be opened smoothly. When the top of the push plate abuts against the door closing plug block, it ensures that multiple cabinet doors can be closed in sequence. When the cabinet door is closed, the cooperation between the fixed baffle and the moving plate makes the cabinet door reliably locked, and pulling the cabinet door handle cannot open the cabinet door, preventing the cabinet door from being pulled open at will and causing safety accidents.

[0028] 4. Two limit adjustment blocks limit the push rod on both sides, ensuring that the push rod is stably assembled on the cabinet door and preventing the push rod from slipping off the end, thus avoiding the push rod falling off; the fixed seat mounting plate fixes the push rod to the cabinet door, and at the same time, the fixed seat mounting plate provides positioning and movement guidance for the push rod. The first spring can push the limit adjustment block and drive the push rod to reset after the cabinet door is opened, ensuring that the interlocking mechanism always operates effectively.

[0029] 5. When the cabinet door corresponding to the locking component is closed, the positioning cylinder is located in the positioning sleeve, which plays a double locking role, enhances the structural rigidity of the locking component, and prevents the fixed baffle and moving plate from deforming or even breaking when the door handle is pulled without opening the door in sequence, causing the interlocking mechanism to fail; when the cabinet door corresponding to the locking component is closed, the positioning protrusion is inserted into the positioning groove, effectively preventing the fixed baffle and moving plate from shaking; when the cabinet door corresponding to the locking component is unlocked, the second spring assists in pushing the fixed cylinder to move out of the positioning sleeve more smoothly. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0031] Figure 2 This is a schematic diagram of the structure of the first fixed back plate and the second fixed back plate in Embodiment 1 of this application.

[0032] Figure 3 This is a schematic diagram of the structure used in Embodiment 1 of this application to illustrate the unlocked state of the first cabinet door.

[0033] Figure 4 This is a schematic diagram of the structure of Embodiment 1 of this application, illustrating the opening of the first cabinet door.

[0034] Figure 5 This is a schematic diagram of the structure of Embodiment 1 of this application, illustrating the opening of the first and second cabinet doors.

[0035] Figure 6 This is a schematic diagram of Embodiment 1 of this application, illustrating that all three cabinet doors are open.

[0036] Figure 7 This is a schematic diagram of the structure of the fixed sleeve and the fixed cylinder in Embodiment 2 of this application.

[0037] Figure 8 This is a cross-sectional structural diagram of Embodiment 2 of this application, illustrating the second spring and the positioning groove.

[0038] Explanation of reference numerals in the attached drawings: 1. Push rod; 2. First spring; 3. Linkage component; 31. Door closing insert block; 32. Push plate; 321. Guide surface; 33. Disassembly plate; 331. Threaded hole; 4. Locking component; 41. Fixed baffle; 42. Moving plate; 51. First fixed back plate; 511. First through groove; 52. Second fixed back plate; 521. Second through groove; 53. Mounting hole; 6. Limit adjustment block; 7. Fixed seat mounting plate; 81. Fixed plate; 82. Fixed sleeve; 821. Second spring; 822. Positioning groove; 83. Fixed cylinder; 831. Positioning protrusion. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0040] Example 1 This application discloses a multi-door safety interlocking mechanism for an electrical control cabinet.

[0041] like Figure 1 The multi-door safety interlock mechanism of the electrical control cabinet includes a push rod 1, on which two limit adjustment blocks 6 are installed. The two limit adjustment blocks 6 are fixed at both ends of the push rod 1. The limit adjustment blocks 6 are square, one of which is flush with one end of the push rod 1, and the other end of the push rod 1 passes through the other limit adjustment block 6. Three mounting plates 7 are also provided on the push rod 1. The mounting plates 7 are fixed on the cabinet door. One of the mounting plates 7 is located in the middle of the push rod 1. The other two mounting plates 7 are set near the limit adjustment block 6 and are set away from the end of the push rod 1 relative to the limit adjustment block 6. Two first springs 2 are also installed on the push rod 1. The two first springs 2 are located between the limit adjustment block 6 and its adjacent fixed base mounting plate 7. One end of the first spring 2 is fixed on the limit adjustment block 6, and the other end of the first spring 2 is fixed on the fixed base mounting plate 7.

[0042] In other embodiments, three, four, or other numbers of limiting adjustment blocks 6 can be inserted through the push rod 1, and four or other numbers of fixed seat mounting plates 7 can also be inserted through the push rod 1. The limiting adjustment blocks 6 and the fixed seat mounting plates 7 can be arranged close to each other, and a first spring 2 can be sleeved on the push rod 1 between the limiting adjustment blocks 6 and the adjacent fixed seat mounting plates 7.

[0043] It also includes multiple linkage parts 3 and multiple locking parts 4. The linkage parts 3 correspond one-to-one with the cabinet doors, and the locking parts 4 correspond one-to-one with the cabinet doors. The first locking part 4 is controlled by the main power switch. When the main power is turned on, the first locking part 4 to the Nth locking part 4 are all in the locked state. When the main power is turned off, the first locking part 4 is in the unlocked state, and the second locking part 4 to the Nth locking part 4 are in the locked state. After the cabinet door corresponding to the first locking part 4 is opened, the first linkage part 3 releases the first spring 2, and the second locking part 4 is in the unlocked state. The third locking part 4 to the Nth locking part 4 are in the locked state, and so on. After the cabinet door corresponding to the first locking part 4 to the N-1th locking part 4 is opened, the N-1th linkage part 3 releases the first spring 2, and the Nth locking part 4 is in the unlocked state. When the cabinet door corresponding to the first linkage 3 to the Nth linkage 3 is opened, the first linkage 3 to the (N-1)th linkage 3 restricts the corresponding cabinet door from closing. When the cabinet door corresponding to the Nth linkage 3 is closed, the Nth linkage 3 pushes the push rod 1 to store energy in the first spring 2, and the (N-1)th locking member 4 releases the closing restriction of its corresponding cabinet door. The first linkage 3 to the (N-2)th linkage 3 still restrict the closing of their corresponding cabinet doors, and so on. When the cabinet door corresponding to the second linkage 3 is closed, the second linkage 3 pushes the push rod 1 to store energy in the first spring 2, and the first locking member 4 releases the closing restriction of its corresponding cabinet door. After the cabinet door corresponding to the first linkage 3 is closed, the main power switch can be turned on.

[0044] In this embodiment, N is three, including three linkage components 3 and three locking components 4. The linkage component 3 includes a disassembly plate 33 and a door closing plug block 31. The disassembly plate 33 is an L-shaped plate. One end of the disassembly plate 33 is fixed to the push rod 1. The other end of the disassembly plate 33 has two sets of threaded holes 331. The door closing plug block 31 is installed on the disassembly plate 33 by bolts passing through the threaded holes 331. The linkage component 3 also includes a push plate 32. The push plate 32 is connected to the cabinet door handle. The end of the push plate 32 near the door closing plug block 31 is provided with a guide surface 321. The guide surface 321 is an inclined surface. The first push plate 32 is a flag-shaped plate similar to the number "1" with a flat top. The guide surface 321 is set away from the second push plate 32. The second push plate 32 is a vertical plate. The guide surface 321 is set away from the third push plate 32. The third push plate 32 is similar to a Z-shaped plate. The turning point of the third push plate 32 is ninety degrees. The guide surface 321 is set towards the second push plate 32.

[0045] In other embodiments, N can be selected according to the number of cabinet doors or requirements. The disassembly plate 33 can be a rectangular plate or other shaped plate. The disassembly plate 33 can be provided with three sets, four sets or other numbers of threaded holes 331. The guide surface 321 can also be an arc-shaped or other shaped guide surface 321. The push plate 32 can also be other shapes.

[0046] like Figure 2 The locking component 4 includes a fixed baffle 41 and a movable plate 42. The fixed baffle 41 is an L-shaped plate. One end of the fixed baffle 41 is fixed to the push rod 1, and the other end of the fixed baffle 41 extends toward the movable plate 42. The movable plate 42 is connected to the cabinet door handle. The movable plate 42 is also an L-shaped plate. One end of the movable plate 42 is connected to the cabinet door handle, and the other end of the movable plate 42 extends toward the fixed baffle 41. A second fixed back plate 52 is provided on the cabinet door. The second fixed back plate 52 is a thick square plate with rounded corners. A second through groove 521 is provided on the side of the second fixed back plate 52 away from the cabinet door. The second through groove 521 runs through the length of the second fixed back plate 52. A first fixed back plate 51 is fixedly provided on the side of the second fixed back plate 52 away from the cabinet door. The first fixed back plate 51 is a thick square plate with rounded corners. The first fixed back plate 51 and the second fixed back plate 52 are fitted together. The first fixed back plate 51 is larger than the second fixed back plate 52. A first through groove 511 is provided on the side of the first fixed back plate 51 facing the second fixed back plate 52. The first through groove 511 and the second through groove 521 are arranged opposite each other. The first fixed back plate 51 and the second fixed back plate 52 are fitted together so that the first through groove 511 and the second through groove 521 merge to form a mounting hole 53. The cabinet door latch passes through the mounting hole 53. Taking the second push plate 32 and the second moving plate 42 as an example, the push plate 32 and the moving plate 42 are fixed together on the first fixed back plate 51. The push plate 32 and the moving plate 42 are located on both sides of the first fixed back plate 51. The push plate 32 is located on the side of the first fixed back plate 51 away from the fixed baffle 41, and the moving plate 42 is located on the side of the first fixed back plate 51 close to the fixed baffle 41.

[0047] like Figure 1 With the main power on, the first movable plate 42 of the multi-door safety interlock mechanism is located above the first fixed baffle 41, and the two are interlocked. The second movable plate 42 is located above the second fixed baffle 41, and the two are interlocked. The third movable plate 42 is located above the third fixed baffle 41, and the two are interlocked, thus locking all three cabinet doors.

[0048] like Figure 3During the opening process, after the main power is turned off, the first spring 2 releases energy. Specifically, an electromagnet is installed at the end of the push rod 1 near the main power switch. When the main power is turned on, the electromagnet attracts the push rod 1 to move. After the main power is turned off, the attraction is eliminated. In other embodiments, a linkage mechanism is set at the power knob. The linkage drives the push rod 1 to move laterally. The first spring 2 drives the push rod 1 to move along its length towards the third cabinet door. The first moving plate 42 and the first fixed baffle 41 separate. The guide surface 321 of the first push plate 32 abuts against the first door closing plug block 31. The second moving plate 42 is still located above the second fixed baffle 41, and the two are locked together. The third moving plate 42 is still located above the third fixed baffle 41, and the two are locked together, thus unlocking the first cabinet door and locking the second and third cabinet doors.

[0049] like Figure 4 After the first cabinet door is opened, the first push plate 32 separates from the first door closing plug block 31, the first spring 2 releases energy, and the first spring 2 drives the push rod 1 to move along its length toward the third cabinet door. The second moving plate 42 separates from the second fixed baffle 41, and the guide surface 321 of the second push plate 32 abuts against the second door closing plug block 31. The third moving plate 42 is still located above the third fixed baffle 41, and the two are locked together, realizing the opening of the first cabinet door, the unlocking of the second cabinet door, and the locking of the third cabinet door.

[0050] like Figure 5 After the second cabinet door is opened, the second push plate 32 separates from the second door closing plug block 31, the first spring 2 releases energy, and the first spring 2 drives the push rod 1 to move along its length toward the third cabinet door. The third moving plate 42 separates from the third fixed baffle 41, and the guide surface 321 of the third push plate 32 abuts against the third door closing plug block 31, thereby opening the first and second cabinet doors and unlocking the third cabinet door.

[0051] like Figure 6 After the third cabinet door is opened, the third push plate 32 separates from the third door closing plug block 31, the first spring 2 releases energy, and the first spring 2 drives the push rod 1 to move along its length toward the third cabinet door, thus opening the three cabinet doors.

[0052] like Figure 5 During the closing process, when the third cabinet door closes, the guide surface 321 of the third push plate 32 pushes the third door closing plug block 31, causing the first spring 2 to store energy. The first spring 2 drives the push rod 1 to move along its length toward the first cabinet door. The top of the first push plate 32 is located below the first door closing plug block 31, so that the third cabinet door is closed and in the unlocked state, the second cabinet door is open, and the first cabinet door is open and cannot be closed.

[0053] like Figure 4 When the second cabinet door is closed, the guide surface 321 of the second push plate 32 pushes the second door closing plug block 31, causing the first spring 2 to store energy. The first spring 2 drives the push rod 1 to move along its length toward the first cabinet door. The third moving plate 42 is still located above the third fixed baffle 41. The two are locked together to lock the third cabinet door. The second cabinet door is closed and in the unlocked state, and the first cabinet door is opened.

[0054] like Figure 3 When the first cabinet door is closed, the guide surface 321 of the first push plate 32 pushes the first door closing plug block 31, causing the first spring 2 to store energy. The first spring 2 drives the push rod 1 to move along its length toward the first cabinet door. The second moving plate 42 is still above the second fixed baffle 41, and the two are locked together. The third moving plate 42 is still above the third fixed baffle 41, and the two are locked together, thus locking the third and second cabinet doors. The first cabinet door is closed and in the unlocked state.

[0055] The implementation principle of this application embodiment is as follows: through the cooperation of push rod 1, spring, linkage 3, and locking part 4, a sequence control mechanism is formed, which effectively prevents the cabinet door from being opened and closed at will, so that multiple cabinet doors can only be opened and closed in a preset order. That is, when the previous cabinet door is not opened, the next cabinet door cannot be opened, or when the next cabinet door is not closed, the previous cabinet door cannot be closed. The close cooperation of linkage 3 and locking part 4 specifies the opening sequence, avoids the staff from opening the cabinet door at will and exposing the internal components and accidentally touching the circuit, which may cause safety accidents, and enhances safety protection. When the main power is on, all cabinet doors cannot be opened. The main power must be turned off first, and then the cabinet doors must be opened in the order of the first, second, and third doors. The main power cannot be turned on if any cabinet door is not closed. The power can only be turned on after the cabinet doors are closed in the order of the third, second, and first doors. This avoids the risk of short circuits and electric shocks caused by staff accidentally touching the equipment when the equipment inside the cabinet is energized, thus improving the safety and reliability of the equipment.

[0056] Example 2 Reference Figure 7 and Figure 8The difference between this embodiment and embodiment 1 is that a fixing plate 81 is fixedly installed on the side of the fixing baffle 41 away from the push rod 1. The fixing plate 81 is a rectangular thick plate. One end of the fixing plate 81 is attached to the fixing baffle 41 and fixedly installed on the other end of the fixing plate 81. The fixing sleeve 82 has a cuboid structure on the outside. The side of the fixing sleeve 82 away from the moving plate 42 is attached to the fixing plate 81 and fixedly installed on the side of the fixing sleeve 82. The top of the fixing sleeve 82 is attached to the fixing baffle 41 and fixedly installed on the side of the fixing sleeve facing the moving plate 42. A second spring 821 is fixedly installed inside the positioning sleeve. The positioning sleeve has a positioning groove 822, which surrounds the inner wall of the positioning sleeve. A fixing cylinder 83 is fixedly installed on the moving plate 42 and faces the fixing sleeve 82. A positioning protrusion 831 is provided on the fixing cylinder 83.

[0057] In other embodiments, the outer surface of the retaining sleeve 82 may also be cylindrical or other shaped structures.

[0058] The implementation principle of Example 2 is as follows: When the cabinet door corresponding to the locking component 4 is closed, the positioning cylinder is located in the positioning sleeve, which plays a double locking role, enhances the structural rigidity of the locking component 4, and prevents the fixed baffle 41 and the moving plate 42 from deforming or even breaking when the door handle is pulled without opening the door in sequence, causing the interlocking mechanism to fail; when the cabinet door corresponding to the locking component 4 is closed, the positioning protrusion 831 is inserted into the positioning groove 822, effectively preventing the fixed baffle 41 and the moving plate 42 from shaking; when the cabinet door corresponding to the locking component 4 is unlocked, the second spring 821 assists in pushing the fixed cylinder 83 to move out of the positioning sleeve more smoothly.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A multi-door safety interlock mechanism for an electrical control cabinet, characterized in that: It includes a push rod (1), a first spring (2), multiple linkage parts (3) and multiple locking parts (4). The linkage parts (3) correspond one-to-one with the cabinet door, the locking parts (4) correspond one-to-one with the cabinet door, and the push rod (1) is connected to the first spring (2). When the door is closed, the linkage (3) is used to drive the push rod (1) to move so that the first spring (2) stores energy. When the door is opened, the linkage (3) releases the limit on the push rod (1) so that the first spring (2) releases energy. When the cabinet door corresponding to any of the linkage components (3) is in the open state, the adjacent preceding linkage component (3) restricts its corresponding cabinet door from closing. When the cabinet door corresponding to any of the linkage components (3) is in the closed state, the linkage component (3) pushes the push rod (1) to move, so that the adjacent preceding linkage component (3) releases the closing restriction of its corresponding cabinet door, and at the same time controls the locking components (4) after it to be in the locking state, thereby realizing that multiple cabinet doors open and close in sequence according to a preset order.

2. The multi-door safety interlock mechanism for the electrical control cabinet according to claim 1, characterized in that: The linkage component (3) is provided in three parts, and the locking component (4) is provided in three parts. The first locking component (4) is controlled by the main power switch. When the main power switch is turned on, the first locking member (4), the second locking member (4), and the third locking member (4) are all in the locked state. When the main power switch is turned off, the first locking member (4) is in the unlocked state, and the second linkage member (3) and the third linkage member (3) are in the locked state. The cabinet door corresponding to the first linkage member (3) can be opened. When the cabinet door corresponding to the first linkage member (3) is opened, the first linkage member (3) releases the first spring (2), the second locking member (4) is in the unlocked state, and the third locking member (4) is still in the locked state. The cabinet door corresponding to the second linkage member (3) can be opened. When the cabinet door corresponding to the second linkage member (3) is opened, the second linkage member (3) releases the first spring (2) again, the third locking member (4) is in the unlocked state, and the cabinet door corresponding to the third linkage member (3) can be opened. When the cabinet door corresponding to the third linkage (3) is opened, the first linkage (3) and the second linkage (3) restrict the corresponding cabinet door from closing. When the cabinet door corresponding to the third linkage (3) is closed, the third linkage (3) pushes the push rod (1) to move and store energy, so that the second locking member (4) releases the closing restriction of its corresponding cabinet door. The first linkage (3) is still in the restricted closing state. When the cabinet door corresponding to the second linkage (3) is closed, the second linkage (3) pushes the push rod (1) to move and store energy, so that the first locking member (4) releases the closing restriction of its corresponding cabinet door. After the cabinet door corresponding to the first linkage (3) is closed, the main power switch can be turned on.

3. The multi-door safety interlock mechanism for the electrical control cabinet according to claim 1, characterized in that: The linkage (3) includes a door closing plug block (31) and a push plate (32). The door closing plug block (31) is fixedly mounted on the push rod (1). The push plate (32) is connected to the cabinet door handle. The push plate (32) has a guide surface (321) at one end near the door closing plug block (31). When the guide surface (321) is directly below the door closing plug block (31), the cabinet door handle drives the push plate (32), causing the guide surface (321) to push the door closing plug block (31) and move the push rod (1). When the top of the push plate (32) is below the door closing plug block (31), the door closing plug block (31) abuts against the push plate (32), restricting the corresponding cabinet door from closing.

4. The multi-door safety interlock mechanism of the electrical control cabinet according to claim 3, characterized in that: The linkage component (3) includes a disassembly plate (33), the door closing plug block (31) is installed on the disassembly plate (33), the door closing plug block is detachably connected, and the disassembly plate (33) is provided with multiple sets of threaded holes (331), the threaded holes (331) are used to adjust the position of the door closing plug block (31) as needed.

5. The multi-door safety interlock mechanism for the electrical control cabinet according to claim 3, characterized in that: The locking component (4) includes a fixed baffle (41) and a movable plate (42). The fixed baffle (41) is fixedly mounted on the push rod (1). The movable plate (42) is connected to the cabinet door handle. When the cabinet door corresponding to the locking component (4) is closed, the movable plate (42) is locked above the fixed baffle (41), thus restricting the movement of the cabinet door handle and locking it. When the fixed baffle (41) and the movable plate (42) are separated, the cabinet door handle can move and unlock it.

6. The multi-door safety interlock mechanism for electrical control cabinet according to claim 5, characterized in that: It also includes a first fixed back plate (51), on which the push plate (32) and the moving plate (42) are fixedly mounted. A first through groove (511) is provided on the first fixed back plate (51), which is located on the side of the first fixed back plate (51) facing the cabinet door. A second fixed back plate (52) is fixedly mounted on the first fixed back plate (51), which is used to fix the push plate (32) and the moving plate (42) on the cabinet door. A second through groove (521) is provided on the second fixed back plate (52), which is opened facing the first fixed back plate (51). The first through groove (511) and the second through groove (521) are opposite to each other. The first through groove (511) and the second through groove (521) together form a mounting hole (53), which is used to connect with the cabinet door latch.

7. The multi-door safety interlock mechanism for electrical control cabinet according to claim 1, characterized in that: At least two limiting adjustment blocks (6) are provided on the push rod (1), and the limiting adjustment blocks (6) are located at both ends of the push rod (1).

8. The multi-door safety interlock mechanism for electrical control cabinet according to claim 7, characterized in that: The push rod (1) is provided with several fixed seat mounting plates (7), which are used to fix and limit the movement of the push rod (1); At least one of the limiting adjustment blocks (6) and the adjacent fixed seat mounting plate (7) are provided with the first spring (2), the first spring (2) is sleeved on the push rod (1), and the first spring (2) is used to drive the push rod (1) to reset.

9. The multi-door safety interlock mechanism for electrical control cabinet according to claim 5, characterized in that: A fixing plate (81) is fixedly provided on the side of the fixing baffle (41) away from the moving plate (42). One end of the fixing plate (81) is fitted to the fixing baffle (41), and a fixing sleeve (82) is fixedly provided on the other end of the fixing plate (81). The top of the fixing sleeve (82) is fixedly connected to the fixing baffle (41). A fixed cylinder (83) is fixedly installed on the movable plate (42). The fixed cylinder (83) is positioned facing the fixed sleeve (82). When the locking member (4) is in the locked state, the fixed cylinder (83) is located inside the fixed sleeve (82). When the locking member (4) is released from the locked state, the fixed cylinder (83) separates from the fixed sleeve (82).

10. The multi-door safety interlock mechanism for electrical control cabinet according to claim 9, characterized in that: A second spring (821) is fixedly installed inside the positioning sleeve. The second spring (821) is used to assist in pushing the fixed cylinder (83) to move. The positioning sleeve is provided with a positioning groove (822). The fixed cylinder (83) is provided with a positioning protrusion (831). When the locking member (4) is in the locked state, the fixed cylinder (83) is located in the positioning sleeve and compresses the second spring (821), and the positioning protrusion (831) is located in the positioning groove (822). When the locking member (4) is released from the locked state, the second spring (821) assists in pushing the positioning cylinder to separate from the positioning sleeve.

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