Mechanical five-prevention interlocking device and inflatable cabinet

Abstract

The invention discloses a mechanical five-prevention interlocking device and a gas-insulated switchgear, and the device comprises a three-station interlocking system which comprises an interlocking locking plate and is used for operating a main shaft to be switched from an isolation state to a grounding state so as to drive the interlocking locking plate to be switched from an unlocking position to a locking position; the interlocking lifting system comprises a lifting piece, a stopping plate, an opening locking plate and a clamping plate, and the interlocking locking plate limits lifting of the lifting piece at a locking position and relieves limitation at an unlocking position; the opening and closing interlocking system comprises an opening buckle plate and a baffle plate, and the baffle plate locks the stop plate at the opening position and unlocks at the closing position; the lifted lifting piece drives the opening locking plate to move to a position for locking the opening buckle plate; the back door interlocking system comprises a rotating shaft and a back door locking plate, a back door hook is arranged on the back door of the cabinet body, and the lifted lifting piece drives the back door locking plate and the back door hook to be unlocked; the cabinet further comprises a locking shaft plate, a receding opening is formed in the locking shaft plate, the receding opening corresponds to the clamping plate when the cabinet body rear door is closed, and the receding opening and the clamping plate are staggered when the cabinet body rear door is opened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of switchgear, in particular to a mechanical five-prevention interlocking device and a gas-filled cabinet. BACKGROUND

[0002] At present, the mechanical five-prevention interlocking device is often only used for air-insulated switch cabinets. However, since all high-voltage circuits of the medium-voltage gas-insulated metal-enclosed switchgear (gas-filled cabinet) are completely sealed in the gas tank, it is generally believed that the gas-filled cabinet is relatively safe, and the corresponding mechanical five-prevention interlocking device is not designed in the gas-filled cabinet. Moreover, the cable chamber of most gas-filled cabinets is located at the rear of the cabinet, and the relative position of the three-position and the circuit breaker is relatively far away, the mechanical transmission is complex, and it is difficult to design the mechanical five-prevention interlocking device.

[0003] However, according to relevant regulations, the gas-filled cabinet must have the grounding interlocking function, and the mechanical interlocking is required. Some manufacturers in the industry use steel wires for mechanical transmission interlocking. However, the steel wires have problems in service life and interlocking transmission accuracy, and the product performance has problems.

[0004] Therefore, how to provide a mechanical five-prevention interlocking device with high reliability and high safety for the product with the cable chamber located at the rear of the gas-filled cabinet is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a mechanical five-prevention interlocking device and a gas-filled cabinet, which can be applied to the gas-filled cabinet product with the cable chamber located at the rear of the cabinet, and has high reliability and safety.

[0006] To achieve the above-mentioned purpose, the present application provides a mechanical five-prevention interlocking device, which comprises:

[0007] A three-position interlocking system comprising an interlocking locking plate in driving connection with a three-position operating main shaft, the operating main shaft being switched from an isolation state to a grounding state to drive the interlocking locking plate to switch from an unlocking position to a locking position;

[0008] An interlocking lifting system comprising a lifting piece capable of being lifted, a stop plate connected thereto, a closing locking plate, and a clamping plate, the interlocking locking plate limiting the lifting of the lifting piece in the locking position and releasing the limitation in the unlocking position;

[0009] A closing and opening interlocking system comprising a closing buckle plate and a baffle plate provided on a closing and opening main shaft, the closing and opening main shaft being used to drive the baffle plate to switch between a closing position and an opening position, the baffle plate locking the stop plate in the closing position to limit the lifting of the lifting piece, and releasing the limitation in the opening position; the lifted lifting piece drives the closing locking plate to move to a position for locking the closing buckle plate;

[0010] The back door interlocking system comprises a rotating shaft penetrating the back door of the cabinet and a back door locking plate arranged on the rotating shaft, the back door of the cabinet is provided with a back door hook locked with the back door locking plate, the locking plate is in transmission connection with the rotating shaft, and the lifting of the pulling piece drives the back door locking plate to be unlocked with the back door hook; the back door interlocking system further comprises a locking shaft plate in transmission connection with the back door of the cabinet, the locking shaft plate is provided with an avoiding opening, the avoiding opening corresponds to the locking plate when the back door of the cabinet is closed, and the avoiding opening is out of position with the locking plate when the back door of the cabinet is opened to limit the lowering of the pulling piece.

[0011] Optionally, a driving plate is fixed on the operation spindle, and the three-position interlocking system further comprises:

[0012] A connecting plate is arranged in abutment with one end of the driving plate, and the connecting plate is configured to move linearly under the driving of the driving plate;

[0013] A hinged plate is hinged at one end of the connecting plate and at the other end of the interlocking locking plate to drive the interlocking locking plate to move between the locking position and the unlocking position;

[0014] A first support is fixedly arranged on the top of the circuit breaker, and the first support has a hinge position connected with the middle part of the hinged plate;

[0015] A second support is fixedly arranged on the top of the circuit breaker, the second support is provided with a limiting hole for linear movement of the interlocking locking plate, both ends of the interlocking locking plate are located outside the second support, and the other end of the interlocking locking plate is used for locking or unlocking the pulling piece.

[0016] Optionally, the pulling piece comprises a pulling rod lifted or lowered along the axial direction and a pulling handle arranged on the pulling rod;

[0017] The pulling rod penetrates the circuit breaker along the axial direction, and both axial ends of the pulling rod are located outside the circuit breaker;

[0018] One end of the pulling handle extends towards the interlocking locking plate, the interlocking locking plate in the locking position is limitedly connected with the pulling handle in the axial direction of the pulling rod to limit the lifting of the pulling piece, and the interlocking locking plate in the unlocking position is disconnected with the pulling handle.

[0019] Optionally, the top of the circuit breaker is provided with a guide frame, the guide frame is provided with a guide hole, the pulling handle penetrates the guide hole, and the pulling handle moves along the axial direction of the pulling rod under the guidance of the guide hole;

[0020] The top of the guide hole is provided with a temporary storage groove in communication with the guide hole, and the pulling handle can enter the temporary storage groove from the guide hole to keep the pulling piece in the lifted state.

[0021] Optionally, the disconnecting lock plate is arranged in an L shape, one L-shaped edge of the disconnecting lock plate is connected with a guide sliding block, and the other L-shaped edge of the disconnecting lock plate moves under the guidance of the guide sliding block between a position for locking the disconnecting buckle plate and a position for unlocking the disconnecting buckle plate.

[0022] The guide sliding rail cooperates with the guide sliding block, is arranged at the bottom of the circuit breaker, and the transmission plate connected with the guide sliding block is arranged on the pull rod.

[0023] Optionally, one end of the clamping plate is fixedly connected with the pull rod, and the other end is provided with a U-shaped structure, and the two U-shaped walls of the clamping plate are distributed along the axial direction of the pull rod.

[0024] The end of the rotating shaft away from the rear door lock plate is provided with a connecting arm, the connecting arm is hinged to one U-shaped wall of the clamping plate, and the other U-shaped wall corresponds to the avoiding opening.

[0025] Optionally, one end of the lock shaft plate abuts against the rear door of the cabinet body and moves axially along with the opening and closing of the rear door of the cabinet body, the U-shaped wall corresponds to the avoiding opening when the rear door of the cabinet body is closed, and the lock shaft plate moves in the U-shaped structure of the clamping plate when the rear door of the cabinet body is opened.

[0026] Optionally, a plurality of support frames arranged on the side plate of the cabinet body are further included, and the plurality of support frames are respectively used for supporting the axial movement of the lock shaft plate and supporting the rotation of the rotating shaft.

[0027] Optionally, elastic members are arranged on the pull member and the lock shaft plate, the elastic members are used for providing elastic force for the avoiding opening on the lock shaft plate to be dislocated from the clamping plate, and / or the elastic members are used for providing elastic force for the pull member in the opposite direction of the lifting direction.

[0028] An inflation cabinet includes a cabinet body, a three-position operating device, a circuit breaker, and a mechanical five-prevention interlocking device as described above.

[0029] The three-position operating device and the circuit breaker are arranged on the front side of the cabinet body.

[0030] The three-position interlocking system of the mechanical five-prevention interlocking device is connected with the three-position operating device, the opening and closing interlocking system of the mechanical five-prevention interlocking device is connected with the circuit breaker, the rear door interlocking system of the mechanical five-prevention interlocking device is connected with the rear door of the cabinet body, and the interlocking pull system of the mechanical five-prevention interlocking device is used for connecting the three-position interlocking system, the opening and closing interlocking system, and the rear door interlocking system.

[0031] The beneficial effects of the present application are that the lifting piece can be lifted only when the three-position switch is in the grounding state (the main shaft is switched to the grounding state), and the circuit breaker is in the closed state (the baffle is in the closed position), the lifting piece is lifted to drive the opening latch plate to lock the opening buckle plate, so that the circuit breaker cannot be opened, and the rear door latch plate and the rear door hook are unlocked, so that the cabinet rear door can be opened; and after the cabinet rear door is opened, the avoiding opening on the latch plate is dislocated from the clamping plate, so that the lifting piece cannot be lowered at the lifting position, the circuit breaker cannot be opened, and the three-position switch cannot be unlocked. The present application meets the requirements that only when the three-position switch is in the grounding state and the circuit breaker is in the closed state, the cabinet rear door can be opened, and the cabinet rear door is in the open state, which can reversely lock the circuit breaker and the three-position switch, so that the system grounding state cannot be unlocked, the misentry into the live interval is prevented, and the reliability and safety of the cable chamber behind the cabinet are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0033] Figure 1 The mechanical five-prevention interlocking device provided by the embodiments of the present application is shown in the structural schematic diagram.

[0034] Figure 2 The interlocking latch plate in the locked position provided by the embodiments of the present application is shown in the structural schematic diagram.

[0035] Figure 3 The front view structural schematic diagram of the interlocking latch plate in the unlocked position provided by the embodiments of the present application is shown.

[0036] Figure 4 The front view structural schematic diagram of the interlocking latch plate in the unlocked position provided by the embodiments of the present application is shown.

[0037] Figure 5 The front view structural schematic diagram of the interlocking latch plate in the unlocked position provided by the embodiments of the present application is shown.

[0038] Figure 6 The front view structural schematic diagram of the interlocking latch plate in the unlocked position provided by the embodiments of the present application is shown.

[0039] Figure 7 The front view structural schematic diagram of the interlocking latch plate in the unlocked position provided by the embodiments of the present application is shown.

[0040] Figure 8 Fig. 6 is a perspective view of the baffle in the closed position and the interlock plate locking the disconnection plate according to an embodiment of the present application;

[0041] Figure 9 Fig. 7 is a front view of the baffle in the closed position and the interlock plate locking the disconnection plate according to an embodiment of the present application;

[0042] Figure 10 Fig. 8 is a perspective view of the rear door interlock plate locking the rear door hook according to an embodiment of the present application;

[0043] Figure 11 Fig. 9 is a perspective view of the rear door interlock plate unlocking the rear door hook according to an embodiment of the present application;

[0044] Figure 12 Fig. 10 is a perspective view of the cabinet rear door opened according to an embodiment of the present application;

[0045] Figure 13 Fig. 11 is a front view of the gas-filled cabinet according to an embodiment of the present application;

[0046] Figure 14 Fig. 12 is a perspective view of the gas-filled cabinet according to an embodiment of the present application.

[0047] In the drawings: 1 - driving plate; 2 - operating main shaft; 3 - connecting plate; 4 - hinged plate; 5 - first support; 6 - second support; 7 - interlock plate; 8 - guide frame; 9 - guide hole; 10 - temporary storage groove; 11 - pull handle; 12 - elastic member; 13 - stop plate; 14 - pull rod; 15 - baffle; 16 - disconnection main shaft; 17 - interlock shaft plate; 18 - support frame; 19 - avoiding opening; 20 - connecting arm; 21 - clamping plate; 22 - transmission plate; 23 - guide slide rail; 24 - guide sliding block; 25 - disconnection interlock plate; 26 - disconnection plate; 27 - rotating shaft; 28 - rear door interlock plate; 29 - rear door hook; 30 - cabinet rear door; 31 - cabinet; 32 - three-position operating device; 33 - circuit breaker. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0049] It should be noted that in the present embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "rear" and the like are based on the directions or positional relationships shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0050] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0051] Please refer to Figure 1 In the present embodiment, a mechanical five-prevention interlocking device is provided, which comprises a three-position interlocking system, an interlocking lifting system, a closing and opening interlocking system, and a rear door interlocking system. The three-position interlocking system is connected with a three-position operating device 32, specifically, the three-position interlocking system comprises an interlocking locking plate 7 which is in transmission connection with an operating main shaft 2 of the three-position operating device 32. When the three-position operating device is in grounding operation, the operating main shaft 2 can be switched from an isolation state to a grounding state, thereby driving the interlocking locking plate 7 to switch from an unlocking position to a locking position.

[0052] The interlocking lifting system can be logically locked with the three-position interlocking system, the closing and opening interlocking system, and the rear door interlocking system, thereby realizing the logical sequence of the specific state of each functional unit. Specifically, the interlocking lifting system comprises a lifting piece which can be lifted. The lifting piece can cooperate with the three-position interlocking system. Please refer to Figure 2 and Figure 3 When the interlocking locking plate 7 is in the locking position, the interlocking locking plate 7 interferes with the lifting piece in the direction of movement, thereby limiting the lifting of the lifting piece. Please refer to Figure 4 and Figure 5 Only when the interlocking locking plate 7 moves to the unlocking position, the lifting limitation on the limiting piece can be released.

[0053] In other words, when the three-position switch is in a non-grounding state, the interlocking locking plate 7 locks the lifting piece in the locking position, so that the lifting piece cannot be lifted to unlock. Conversely, when the three-position switch is switched from the isolation state to the grounding state, the interlocking locking plate 7 unlocks the lifting piece in the unlocking position, and the lifting piece can be lifted to unlock.

[0054] The interlocking pull system further comprises a stop plate 13 arranged on the pull member or connected with the pull member, a split closing interlocking plate 25, and a clamping plate 21. The stop plate 13 and the split closing interlocking plate 25 can cooperate with a split and closing interlocking system. Specifically, the split and closing interlocking system comprises a split closing buckle plate 26 and a blocking plate 15 arranged on a split and closing spindle 16. The split closing buckle plate 26 and the split and closing spindle 16 are both internal structures of a circuit breaker 33, and can be used to realize split and closing operations of the circuit breaker 33. When the circuit breaker 33 is switched to a split state, the split and closing spindle 16 can drive the blocking plate 15 to move to a split position. When the circuit breaker 33 is switched to a closing state, the split and closing spindle 16 can drive the blocking plate 15 to move to a closing position.

[0055] Please refer to Figure 6 and Figure 7 . When the blocking plate 15 is at the split position, the blocking plate 15 can interfere with the stop plate 13 in the movement direction (the movement direction of the pull member), thereby locking the stop plate 13, so that the pull member cannot be pulled up to be unlocked. Conversely, please refer to Figure 8 and Figure 9 . When the blocking plate 15 is at the closing position, the blocking plate 15 unlocks the stop plate 13, so that the pull member can be pulled up to be unlocked. As can be seen from the above embodiments, only when the three-position switch is in the grounding state and the circuit breaker 33 is in the closing state, the pull member can be pulled up to be unlocked.

[0056] Please refer to Figure 7 . Before the pull member is pulled up, the split closing interlocking plate 25 and the split closing buckle plate 26 are in an unlocked state, so that the circuit breaker 33 can realize split operation through the split closing buckle plate 26. When the pull member is pulled up, please refer to Figure 9 . The pull member drives the split closing interlocking plate 25 to move, thereby locking the split closing buckle plate 26, so that the circuit breaker 33 cannot be split, and the grounding state of the system is released.

[0057] As can be seen, the cooperation of the split and closing interlocking system and the interlocking pull system can realize that the pull member is pulled up to be unlocked when the circuit breaker 33 is in the closing state, and the split closing buckle plate 26 is reversely locked after the pull member is pulled up, so that the circuit breaker 33 cannot be split.

[0058] The clamping plate 21 of the interlocking pull system can cooperate with a rear door interlocking system. Specifically, the rear door interlocking system comprises a rotating shaft 27 penetrating through a rear door 30 of a cabinet body and a rear door interlocking plate 28 arranged on the rotating shaft 27. The rear door 30 of the cabinet body is provided with a rear door hook 29, and the rear door interlocking plate 28 can cooperate with the rear door hook 29, so as to realize locking of the rear door 30 of the cabinet body. Meanwhile, the clamping plate 21 is in transmission connection with the rotating shaft 27, so that after the pull member is pulled up, the clamping plate 21 and the rotating shaft 27 can be driven to move, thereby realizing that the rear door interlocking plate 28 and the rear door hook 29 are released from locking, and the rear door 30 of the cabinet body can be opened.

[0059] Please refer to Figure 10Before the lifting member is lifted, the rear door locking plate 28 and the rear door hook 29 are in a locked state, and the cabinet rear door 30 cannot be opened at this time; please refer to Figure 11 After the lifting member is lifted, the cabinet rear door 30 can be opened; at the same time, it is pointed out above that "the lifting member can be lifted up and unlocked only when the three-position switch is in the grounded state and the circuit breaker 33 is in the closed state", so the cabinet rear door 30 can be opened only when the three-position switch is in the grounded state and the circuit breaker 33 is in the closed state.

[0060] The rear door interlocking system also includes a locking shaft plate 17 that is transmission-connected to the cabinet rear door 30. When the cabinet rear door 30 is opened or closed, the locking shaft plate 17 can be driven to move along its axial direction. A avoidance opening 19 is provided on the locking shaft plate 17. When the cabinet rear door 30 is closed, the avoidance opening 19 can correspond to the positioning plate 21 in the direction of movement, so that the positioning plate 21 can pass through the avoidance opening 19 during the movement of the lifting member, thereby ensuring the smooth lifting of the lifting member.

[0061] When the cabinet rear door 30 is opened, the locking shaft plate 17 will be driven to move. Figure 12 , causing the avoidance opening 19 and the locking plate 21 to be misaligned, and as mentioned above, the rear door can only be opened when the lifting member is lifted up, so the lifting member should be in the lifted state at this time, and when the locking plate 21 and the avoidance opening 19 are misaligned, the lifting member should remain in the lifted state and cannot be lowered.

[0062] When the lifting member cannot descend, the trip locking plate 25 will continue to lock the trip pinch plate 26, preventing the circuit breaker 33 from opening. It should be noted that both the circuit breaker 33 and the three-position operating device 32 have built-in locking functions. If the circuit breaker 33 is not opened, the three-position operating device 32 cannot be operated. Therefore, simply preventing the circuit breaker 33 from opening can prevent the three-position switch from being released from the grounding state. This will not be described in detail here, and reference can be made to the prior art for details.

[0063] In combination with the above embodiments, the application can only lift the lifting piece when the three-position switch is in the grounding state (the operating spindle 2 is switched to the grounding state) and the circuit breaker 33 is in the closed state (the baffle 15 is in the closed position), and the lifting piece is lifted to drive the opening and closing locking plate 25 to lock the opening and closing buckle plate 26, so that the circuit breaker 33 cannot be opened, and the rear door locking plate 28 and the rear door hook 29 are unlocked to open the cabinet rear door 30; and after the cabinet rear door 30 is opened, the avoiding hole 19 on the locking shaft plate 17 is out of position with the clamping plate 21, so that the lifting piece cannot be lowered at the lifting position, the circuit breaker 33 cannot be opened, and the three-position switch cannot be removed from the grounding state. The application meets the requirements that only when the three-position switch is in the grounding state and the circuit breaker 33 is in the closed state, the cabinet rear door 30 can be opened, and the cabinet rear door 30 is in the open state, which can reversely lock the circuit breaker 33 and the three-position switch, so that they cannot be removed from the system grounding state, prevent misentry into the live interval, and ensure the reliability and safety of the cable chamber behind the cabinet.

[0064] Please refer to Figure 1 The driving plate 1 is fixed on the operating spindle 2, and the driving plate 1 is driven to rotate when the operating spindle 2 is switched from the isolation state to the grounding state; the three-position interlocking system further comprises a connecting plate 3, a hinged plate 4, a first support 5 and a second support 6.

[0065] One end of the connecting plate 3 abuts against the driving plate 1, and the rotation of the driving plate 1 can drive the connecting plate 3 to move linearly; one end of the hinged plate 4 is hinged to the other end of the connecting plate 3, and the other end of the hinged plate 4 is hinged to one end of the interlocking locking plate 7, so that the hinged plate 4 is driven to rotate under the movement of the connecting plate 3, and the rotation of the hinged plate 4 can drive the interlocking locking plate 7 to move between the locking position and the unlocking position. It should be noted that the mutual conversion between rotation and linear motion can be achieved through the strip-shaped hole, for example, a strip-shaped hole is formed on the connecting plate 3, a hinge shaft is arranged on the hinged plate 4, the hinge shaft can extend into the strip-shaped hole and be movably arranged relative to the strip-shaped hole, so that the angle and length changes of the hinge shaft during rotation are achieved through the movement of the hinge shaft relative to the strip-shaped hole, and the mutual conversion between rotation and linear motion is ensured. Similarly, the hinge shaft and the interlocking locking plate 7 can also be arranged in the above-mentioned manner, so that the interlocking locking plate 7 moves linearly between the unlocking position and the locking position.

[0066] The first support 5 and the second support 6 are fixedly arranged on the top outer wall of the circuit breaker 33, the first support 5 has a hinge position connected to the middle part of the hinged plate 4, so that the hinged plate 4 can be stably arranged, and the second support 6 is provided with a limiting hole for the linear movement of the interlocking locking plate 7, and the two ends of the interlocking locking plate 7 are located outside the second support 6, one end of the interlocking locking plate 7 is connected to the hinged plate 4, and the other end is used to lock or unlock the lifting piece.

[0067] The lifting member includes a lifting rod 14 that is lifted or lowered along the axial direction and a lifting handle 11 provided on the lifting rod 14. Figure 1 The lifting rod 14 passes through the circuit breaker 33 along its axial direction, and both axial ends are located outside the circuit breaker 33. The lifting rod 14 can move relative to the circuit breaker 33.

[0068] One end of the lifting handle 11 extends toward the interlocking plate 7, and the other end faces the operator, making it easy to manually lift the lifting handle 11. The interlocking plate 7 in the locked position is locked with the lifting handle 11 in the axial direction (movement direction) of the lifting rod 14. Please refer to Figure 3 , thereby limiting the lifting of the lifting member; and when the interlocking locking plate 7 is in the unlocking position, please refer to Figure 5 , the interlocking locking plate 7 and the lifting handle 11 are released from the engagement.

[0069] A guide frame 8 is also provided on the top outer wall of the circuit breaker 33. A guide hole 9 is provided on the guide frame 8. The lifting handle 11 can pass through the guide hole 9 and move axially along the lifting rod 14 under the guidance of the guide hole 9; a temporary storage groove 10 connected to the top of the guide hole 9 is provided on one side. After the lifting rod 14 is lifted, the lifting handle 11 can move to the top of the guide hole 9 and enter the temporary storage groove 10, so that the lifting rod 14 remains in the lifted state.

[0070] It can be seen that the lifting rod 14 can be kept in the lifting state by opening the cabinet rear door 30 on the one hand, and can be kept in the lifting state by the cooperation between the lifting handle 11 and the temporary storage tank 10 on the other hand.

[0071] It should be noted that, since the lifting rod 14 will translate to one side when the lifting handle 11 enters the temporary storage tank 10 , strip holes may be provided at the top and bottom of the circuit breaker 33 to accommodate the translational movement of the lifting rod 14 .

[0072] Please refer to Figure 1 The trip lock plate 25 is L-shaped, with one L-shaped side connected to a guide slider 24. The other L-shaped side of the trip lock plate 25, guided by the guide slider 24, moves between a position that locks the trip plate 26 and a position that unlocks the trip plate 26. A guide rail 23 cooperates with the guide slider 24, which is located on the bottom inner wall of the circuit breaker 33. A transmission plate 22 connected to the guide slider 24 is provided on the lifting rod 14. When the lifting rod 14 is lifted, the transmission plate 22 can simultaneously drive the guide slider 24 and the trip lock plate 25 to lift, thereby locking the other L-shaped side of the trip lock plate 25 with the trip plate 26.

[0073] Considering that the pull rod 14 has a certain translation effect, the transmission plate 22 can be provided as a certain stretchable transmission plate 22, for example, two relatively slidable transmission plates 22, the sliding direction of the two transmission plates 22 is consistent with the translation direction of the pull rod 14, so as to ensure the stable connection effect of the transmission plate 22 and the guide sliding block 24.

[0074] Please refer to Figure 1 , one end of the clamping plate 21 is fixedly connected with the pull rod 14, and the other end is provided with a U-shaped structure, the two U-shaped walls of the clamping plate 21 are distributed along the axial direction of the pull rod 14; the end of the rotating shaft 27 away from the rear door locking plate 28 is provided with a connecting arm 20, the connecting arm 20 is hinged with one U-shaped wall of the clamping plate 21, so that the linear motion (axial motion along the pull rod 14) of the clamping plate 21 is converted into the rotation of the rotating shaft 27, and the conversion of linear motion and rotation can also be achieved by using a strip-shaped hole, which will not be described here. Please refer to the above technical solutions.

[0075] And even if the pull rod 14 has a translation, the hinging of the clamping plate 21 and the connecting arm 20, and the setting of the strip-shaped hole can satisfy the stable connection of the clamping plate 21 and the connecting arm 20.

[0076] And the other U-shaped wall of the clamping plate 21 corresponds to the avoiding hole 19, when the pull rod 14 is lifted, the U-shaped wall can pass through the avoiding hole 19, so as to ensure the stable lifting of the pull rod 14.

[0077] The transmission connection form of the cabinet rear door 30 and the locking shaft plate 17 includes but is not limited to that one end of the locking shaft plate 17 abuts against the cabinet rear door 30. The transmission connection is reflected in that: when the cabinet rear door 30 is closed, the locking shaft plate 17 is pressed by the cabinet rear door 30, the avoiding hole 19 on the locking shaft plate 17 corresponds to the clamping plate 21; when the cabinet rear door 30 is opened, the cabinet rear door 30 releases the pressing of the locking shaft plate 17, the locking shaft plate 17 can move towards the cabinet rear door 30, so that the locking shaft plate 17 moves along the axial direction, and the avoiding hole 19 is dislocated from the clamping plate 21.

[0078] One side of the locking shaft plate 17 is a shaft structure, the other side is a plate structure, and the avoiding hole 19 is arranged on the plate structure; the above indicates that only when the pull rod 14 is lifted, the cabinet rear door 30 can be opened, so when the rear door can be opened, the other U-shaped wall of the clamping plate 21 has passed through the avoiding hole 19, and its U-shaped structure corresponds to the locking shaft plate 17, at this time, if the cabinet rear door 30 is opened, the locking shaft plate 17 will move in the U-shaped structure of the clamping plate 21.

[0079] It can be seen that after the rear door 30 of the cabinet body is opened, the blocking shaft plate 17 moves so that the avoiding opening 19 is dislocated from the clamping plate 21, thereby forming mechanical limiting for the clamping plate 21, the blocking shaft plate 17 is clamped in the U-shaped structure of the clamping plate 21, so that the clamping plate 21 cannot be lowered, and the pull rod fixedly connected with the clamping plate 21 cannot be lowered either, but can only be kept in the lifting state.

[0080] The pull rod 14 cannot be lowered, so that the disconnecting blocking plate 25 cannot be lowered, the disconnecting buckle plate 26 cannot be unlocked, the circuit breaker 33 cannot be disconnected, the three-position cannot be operated, and the grounding state cannot be released, thereby realizing the functional requirement that the rear door 30 of the cabinet body cannot be closed and the grounding system cannot be released.

[0081] The mechanical five-prevention interlocking device is arranged in the cabinet body 31, and the limiting of the moving parts can be realized by using the internal side plate, back plate and front plate of the cabinet body 31. For example, a plurality of support frames 18 can be arranged on the side plate, and the plurality of support frames 18 are respectively used for supporting the axial movement of the blocking shaft plate 17 and supporting the rotation of the rotating shaft 27. The support frame 18 cooperates with the shaft structure of the blocking shaft plate 17, so that the blocking shaft plate 17 can stably move in the axial direction. Further, the support frame 18 also cooperates with the plate structure of the blocking shaft plate 17, so that the blocking shaft plate 17 only moves in the axial direction and cannot rotate, thereby ensuring the accuracy of the position of the avoiding opening 19.

[0082] In addition, elastic members 12 are arranged on the pull rod 14 and the blocking shaft plate 17. The elastic members 12 are, for example, springs, which are sleeved on the outer periphery of the pull rod 14 and the shaft structure of the blocking shaft plate 17. The elastic members 12 can provide elastic force for the blocking shaft plate 17 to move towards the rear door 30 of the cabinet body, or provide elastic force for the avoiding opening 19 to be dislocated from the clamping plate 21, so that the avoiding opening 19 can be automatically dislocated from the clamping plate 21 under the action of the elastic force when the rear door 30 of the cabinet body is opened. The elastic members 12 can provide elastic force in the opposite direction of the lifting direction for the pull rod 14, so that the pull rod 14 can have elastic force to automatically lower after the external force disappears.

[0083] A pin can be arranged on the pull rod 14 and the blocking shaft plate 17. For example, the spring on the pull rod 14 is connected with the pin and the top or bottom of the circuit breaker 33 at both ends, so as to apply elastic force to the pull rod 14. Similarly, the spring on the blocking shaft plate 17 is located on the shaft structure thereof, and the spring can be connected with the pin and the support frame 18 at both ends, so as to apply elastic force to the blocking shaft plate 17.

[0084] The application also provides an inflation cabinet, which is described in detail in the following Figure 13 and Figure 14The air tank includes a tank body 31, a three-position operating device 32, a circuit breaker 33, and the mechanical five-protection interlocking device as described above; the three-position operating device 32 and the circuit breaker 33 are arranged on the front side of the tank body 31, the three-position interlocking system of the mechanical five-protection interlocking device is connected with the three-position operating device 32, the opening and closing interlocking system of the mechanical five-protection interlocking device is connected with the circuit breaker 33, and the rear door interlocking system of the mechanical five-protection interlocking device is connected with the tank body rear door 30 of the tank body 31.

[0085] It should be noted that the relative terms, such as first and second, are used herein only to differentiate one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities.

[0086] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above description of the examples is only used to help understand the method of the present application and its core idea. It should be pointed out that, for those skilled in the art, some improvements and modifications can be made to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A mechanical five-protection interlocking device, characterized in that: include: A three-station interlocking system includes an interlocking plate (7) in transmission connection with a three-station operating spindle (2), wherein the operating spindle (2) switches from an isolated state to a grounded state to drive the interlocking plate (7) to switch from an unlocked position to a locked position; An interlocking lifting system comprises a lifting member that can be lifted and a stop plate (13) connected thereto, a gate-opening locking plate (25), and a locking plate (21), wherein the interlocking locking plate (7) restricts the lifting of the lifting member in a locked position and releases the restriction in an unlocked position; The opening and closing interlocking system comprises an opening plate (26) and a baffle (15) provided on an opening and closing main shaft (16), wherein the opening and closing main shaft (16) is used to drive the baffle (15) to switch between an opening position and a closing position, wherein the baffle (15) locks the stop plate (13) in the opening position to restrict the lifting of the lifting member, and releases the restriction in the closing position; the lifted lifting member drives the opening locking plate (25) to move to a position where the opening plate (26) is locked; The rear door interlocking system comprises a rotating shaft (27) extending through the cabinet rear door (30) and a rear door locking plate (28) arranged on the rotating shaft (27); the cabinet rear door (30) is provided with a rear door hook (29) locked with the rear door locking plate (28); the positioning plate (21) is transmission-connected with the rotating shaft (27); the lifted lifting member drives the rear door locking plate (28) and the rear door hook (29) to be unlocked; and further comprises a locking shaft plate (17) transmission-connected with the cabinet rear door (30); the locking shaft plate (17) is provided with an avoidance opening (19); when the cabinet rear door (30) is closed, the avoidance opening (19) corresponds to the positioning plate (21); when the cabinet rear door (30) is opened, the avoidance opening (19) is offset from the positioning plate (21) to limit the descent of the lifting member.

2. The mechanical five-protection interlocking device according to claim 1 is characterized in that: A drive plate (1) is fixed on the operating spindle (2), and the three-station interlocking system further comprises: A connecting plate (3), one end of which abuts against the driving plate (1), and the connecting plate (3) is configured to perform linear motion under the drive of the driving plate (1); A hinged plate (4), one end of which is hinged to the other end of the connecting plate (3), and the other end of which is hinged to one end of the interlocking locking plate (7) to drive the interlocking locking plate (7) to move between a locked position and an unlocked position; A first bracket (5) is fixedly arranged on the top of the circuit breaker (33), and the first bracket (5) has a hinge position connected to the middle part of the hinge plate (4); The second bracket (6) is fixedly arranged on the top of the circuit breaker (33), and the second bracket (6) is provided with a limiting hole for the interlocking locking plate (7) to perform linear motion. The two ends of the interlocking locking plate (7) are located outside the second bracket (6), and the other end of the interlocking locking plate (7) is used to lock or unlock the pulling member.

3. The mechanical five-protection interlocking device according to claim 1, characterized in that: The lifting member comprises a lifting rod (14) that is lifted or lowered in the axial direction and a lifting handle (11) provided on the lifting rod (14); The lifting rod (14) passes through the circuit breaker (33) along its axial direction, and both axial ends are located outside the circuit breaker (33); One end of the lifting handle (11) extends toward the interlocking locking plate (7), and the interlocking locking plate (7) in the locked position is engaged with the lifting handle (11) in the axial direction of the lifting rod (14) to limit the lifting of the lifting member; the interlocking locking plate (7) is released from the lifting handle (11) in the unlocked position.

4. The mechanical five-protection interlocking device according to claim 3 is characterized in that: A guide frame (8) is provided on the top of the circuit breaker (33), a guide hole (9) is provided on the guide frame (8), the lifting handle (11) passes through the guide hole (9), and moves axially along the lifting rod (14) under the guidance of the guide hole (9); A temporary storage groove (10) is provided on one side of the top of the guide hole (9) and is in communication with the guide hole. The lifting handle (11) can enter the temporary storage groove (10) through the guide hole (9) to keep the lifting member in a lifted state.

5. The mechanical five-protection interlocking device according to claim 3 is characterized in that: The gate-opening locking plate (25) is arranged in an L-shape, one L-shaped side of the gate-opening locking plate (25) is connected to a guide slider (24), and the other L-shaped side of the gate-opening locking plate (25) moves between a position for locking the gate-opening pinch plate (26) and a position for unlocking the gate-opening pinch plate (26) under the guidance of the guide slider (24); A guide rail (23) cooperates with the guide slider (24), and the guide rail (23) is arranged at the bottom of the circuit breaker (33). A transmission plate (22) connected to the guide slider (24) is provided on the lifting rod (14), and the opening locking plate (25) is connected to the lifting rod (14) through the transmission plate (22).

6. The mechanical five-protection interlocking device according to claim 3, characterized in that: One end of the positioning plate (21) is fixedly connected to the lifting rod (14), and the other end is provided with a U-shaped structure, and the two U-shaped walls of the positioning plate (21) are distributed axially along the lifting rod (14); A connecting arm (20) is provided at one end of the rotating shaft (27) away from the rear door locking plate (28); the connecting arm (20) is hinged to one U-shaped wall of the locking plate (21); and the other U-shaped wall corresponds to the avoidance opening (19).

7. The mechanical five-protection interlocking device according to claim 6, characterized in that: One end of the locking shaft plate (17) abuts against the cabinet rear door (30) and moves axially as the cabinet rear door (30) is opened and closed. When the cabinet rear door (30) is closed, the U-shaped wall corresponds to the avoidance opening (19); when the cabinet rear door (30) is opened, the locking shaft plate (17) moves within the U-shaped structure of the locking plate (21).

8. The mechanical five-protection interlocking device according to claim 1, characterized in that: It also includes a plurality of support frames (18) provided on the side panels of the cabinet body (31), wherein the plurality of support frames (18) are respectively used to support the axial movement of the locking shaft plate (17) and to support the rotation of the rotating shaft (27).

9. The mechanical five-protection interlocking device according to any one of claims 1 to 8, characterized in that: An elastic member (12) is provided on the lifting member and the locking shaft plate (17), and the elastic member (12) is used to provide the avoidance opening (19) on the locking shaft plate (17) with an elastic force that is misaligned with the positioning plate (21), and / or the elastic member (12) is used to provide the lifting member with an elastic force opposite to the lifting direction.

10. An inflatable cabinet, characterized in that: It comprises a cabinet (31), a three-station operating device (32), a circuit breaker (33), and a mechanical five-protection interlocking device according to any one of claims 1 to 9; The three-station operating device (32) and the circuit breaker (33) are arranged on the front side of the cabinet (31); The three-position interlocking system of the mechanical five-protection interlocking device is connected to the three-position operating device (32), the opening and closing interlocking system of the mechanical five-protection interlocking device is connected to the circuit breaker (33), and the rear door interlocking system of the mechanical five-protection interlocking device is connected to the cabinet rear door (30) of the cabinet (31).

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