Mechanical lock and mechanical safety logic interlocking method

Abstract

The invention relates to the technical field of shore power, and discloses a mechanical lock which comprises a socket, a plug and a mechanical lock body are installed at the top of the socket, the mechanical lock body is installed on the right side of the socket through bolts, the mechanical lock body comprises a mechanical lock seat, a mechanical gasket is fixedly connected to the top of the mechanical lock seat, and a mechanical lock cylinder is rotationally connected to the inner diameter of the mechanical gasket; a shifting piece is fixedly connected to the bottom of the mechanical lock cylinder, a mechanical spring bolt is slidably connected to the inner diameter of the mechanical lock seat, and a locking key is slidably connected to the interior of the mechanical lock cylinder. Through the mechanical lock, after the plug is inserted into the socket, the key is rotated to stretch out the spring bolt to clamp the plug and can be pulled out, and the plug can be unlocked and pulled out only after the key of a superior switch cabinet is obtained according to a complete process to complete corresponding operation, so that an operator is effectively prevented from plugging and pulling the plug in an electrified state, and the safety risks of electric shock and arc burn are greatly reduced; and the life safety of personnel is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of shore power, and in particular to a mechanical lock and a mechanical safety logic interlocking method. Background Art

[0002] In the shore power system, safe and reliable connection and operation are crucial. At present, the traditional electrical connection method has certain defects in preventing live plugging and unplugging, which can easily cause safety accidents and threaten the life safety of operators and the stable operation of equipment.

[0003] During the process of connecting the ship to shore power, if the operator mistakenly plugs or unplugs the plug when it is energized, it may cause a strong electric arc, resulting in serious consequences such as burns to personnel and short-circuit damage to electrical equipment. Although some existing technologies have simple protective measures, they are often complex in structure and inconvenient to operate, making it difficult to effectively avoid misoperation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a mechanical lock and a method for mechanical safety logic interlocking, which solves the problem of operators accidentally plugging or unplugging a plug in a live state, causing personal injury.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a mechanical lock, comprising: A socket, with a plug installed on the top of the socket; A mechanical lock is installed on the right side of the socket with bolts. The mechanical lock includes a mechanical lock seat. A mechanical washer is fixedly connected to the top of the mechanical lock seat. A mechanical lock core is rotatably connected to the inner diameter of the mechanical washer. A toggle piece is fixedly connected to the bottom of the mechanical lock core. A mechanical lock tongue is slidably connected to the inner diameter of the mechanical lock seat. A locking key is slidably connected to the inside of the mechanical lock core. The toggle piece and the mechanical lock tongue are slidably connected.

[0006] A mechanical safety logic interlock comprises: a logic lock seat, a plurality of logic washers are fixedly connected to the front side of the logic lock seat, a plurality of the front ends of the logic washers are fixedly connected to connecting sleeves, a plurality of the inner diameters of the connecting sleeves are rotatably connected to logic lock cores, the rear ends of the four logic lock cores at the bottom are fixedly connected to logic first paddles, the four logic lock cores at the bottom are slidably connected to logic first keys, a logic pin groove is opened on the top of the logic lock seat, and a logic lock tongue is slidably connected in the logic pin groove Preferably, a logical second key is slidably connected inside the top logical lock core, a logical second paddle is fixedly connected to the rear end of the top logical lock core, and both the logical first paddle and the logical second paddle are slidably connected to the logical lock tongue.

[0007] A method for using a mechanical lock, used for the mechanical lock according to claim 1, wherein locking the socket and the plug comprises the following steps: Step 1: Confirm that the feeder cabinet is in the state of circuit breaker open, grounding knife closed, socket normal, mechanical lock parts intact and firmly installed, and mechanical lock is in the initial state; Step 2: Insert the plug into the socket accurately to achieve electrical connection between the two; Step 3: Insert the locking key into the mechanical lock core. At this time, the locking key and the mechanical lock core form a match. With the mechanical gasket as the support point, rotate the locking key clockwise or counterclockwise. As the locking key rotates, the mechanical lock core rotates together. Since a toggle piece is fixedly connected to the bottom of the mechanical lock core, the toggle piece will move with the rotation of the mechanical lock core. Step 4: During the rotation of the toggle plate, the sliding connection structure between the toggle plate and the mechanical lock tongue enables the toggle plate to push the mechanical lock tongue, and the mechanical lock tongue slides in the inner diameter of the mechanical lock seat and gradually extends out of the mechanical lock seat. When the mechanical lock tongue extends to a certain position, it will cooperate with the corresponding locking structure on the plug to jam the plug; Step 5: After confirming that the mechanical lock tongue has firmly stuck the plug and the plug is restricted to the socket and cannot be easily pulled out, pull out the locking key from the mechanical lock core. At this time, the plug has been locked on the socket. Insert the locking key into the key exchange box, then withdraw the second locking key, and use the second locking key to operate the second mechanical lock installed at the ground knife of the high-opening cabinet. The lock pin retracts. At this time, the grounding knife can be operated to open the switch, and the second locking key cannot be pulled out. Then open the grounding knife and close the circuit breaker. After waiting for the power supply to be completed, unlock and separate the socket and the plug.

[0008] Preferably, the unlocking and separation of the socket and the plug comprises the following steps: Step 1: Use the second locking key to operate the second mechanical lock installed at the ground switch of the high-opening cabinet. Extend the lock pin, open the circuit breaker again, close the ground switch, and confirm that the surrounding environment is safe and there are no electrical safety hazards. Step 2: Re-insert the second lock key into the key exchange box, then take out the lock key and reinsert the lock key into the mechanical lock core on the socket so that the lock key and the mechanical lock core can be matched again; Step 3: Rotate the locking key in the opposite direction to the locking direction to drive the mechanical lock cylinder to rotate, and then drive the bottom toggle piece to rotate; Step 4: During the rotation process, the toggle plate pulls the mechanical lock tongue through the sliding connection structure between the toggle plate and the mechanical lock tongue, so that the toggle plate slides back in the inner diameter of the mechanical lock seat and gradually retreats into the mechanical lock seat; Step 5: When the mechanical lock tongue is fully retracted and no longer jams the plug, hold the plug and smoothly pull it out from the top of the socket to complete the unlocking and plug removal operations.

[0009] A method for using a mechanical safety logic interlock, used for a mechanical safety logic interlock as claimed in any one of claims 2 to 3, comprising the following steps: Step 1: Multiple logical first keys are K1, K2, K3, K4 from bottom to top, and the logical second key with a different top direction is K5. When you need to pull out the top logical second key, insert the logical first key into the corresponding logical lock cylinder at the bottom in sequence; Step 2: After inserting the selected key into the corresponding logic lock cylinder, turn the key clockwise or counterclockwise in sequence. Turning the logic first key will drive the logic lock cylinder to rotate, and the logic first paddle fixedly connected to the rear end of the logic lock cylinder will rotate accordingly; Step 3: As the first logical paddle rotates, since they are in a sliding connection with the logical lock tongue, the paddle will push the logical lock tongue to slide in the logical pin groove during rotation, so that the originally locked logical second key is unlocked, and then the logical second key is turned, which drives the top logical lock cylinder and the rear end logical second paddle to rotate; Step 4: At this time, the second logic key K5 can be pulled out from the top logic lock cylinder, and the first logic keys K1-K4 are locked in the exchange box. Use key K5 to operate the mechanical lock installed at the AJ1 grounding knife of the feeder cabinet. The lock pin retracts and the key K6 is withdrawn. At this time, the grounding knife is operated to open the switch, and K5 cannot be pulled out. Step 5: Use key K6 to operate the mechanical lock installed at the grounding knife of feeder cabinet AJ2, the lock pin retracts, and key K7 is withdrawn. At this time, the grounding knife is operated to open the switch, and K6 cannot be pulled out. According to the ship's power supply system, select 11kV feeder cabinet AJ1 or 6.6kV feeder cabinet AJ2, and use key K7 to operate the mechanical lock installed at the circuit breaker trolley of one of the cabinets. The lock pin retracts, the circuit breaker trolley can be pushed to the working position, and K7 cannot be pulled out. After the status is confirmed, close the circuit breaker, and the shore-based power supply supplies power to the ship; Step 6: When the interlocking state is unlocked by stopping power supply to the ship, the first logical key K1-K4 is unlocked by reversing the displacement path of the logical lock tongue.

[0010] Preferably, the unlocking logic first key K1-K4 unlocking includes the following steps: Step 1: After completing the power supply operation, return the circuit breaker trolley to the test position and open the switch, turn the key K7 counterclockwise to reset it, pull out K7 after the lock pin pops out, close the grounding switch, turn the key K6 counterclockwise to reset it, pull out K6 after the lock pin pops out, insert the top logic second key K5 into the corresponding lock cylinder, rotate it counterclockwise to drive the logic second paddle to rotate in the opposite direction, so that the logic lock tongue slides back to the initial position along the pin groove; Step 2: Turn the logical first keys K4, K3, K2, and K1 counterclockwise in reverse order to reset each logical first paddle and release the thrust on the logical lock tongue; Step 3: When all logical lock tongues are reset to the locked state, the logical first keys K1-K4 are automatically unlocked and can be pulled out one by one from the exchange box to complete the release of the interlocking state.

[0011] Preferably, the key rotation angle is controlled by a mechanical limiting structure, a 90° limiting boss is provided on the inner wall of the logic lock core, and a guide groove cooperating with the limiting boss is provided on the handle of the logic first key.

[0012] The present invention provides a mechanical lock and a method for mechanical safety logic interlocking. It has the following beneficial effects: 1. The present invention uses a mechanical lock. After the plug is inserted into the socket, the key is turned to extend the lock tongue to clamp the plug and the key can be pulled out. Only after the upper-level switch cabinet key is obtained according to the complete process and the corresponding operation is completed, the plug can be unlocked and pulled out, thereby effectively avoiding the operator plugging and unplugging the plug in a live state, greatly reducing the safety risks of electric shock and arc burns, and ensuring the safety of personnel life.

[0013] 2. The mechanical safety logic interlock of the present invention constructs a multi-level interlocking system from plugs and sockets to the upper-level switch cabinet equipment. In the shore power system of a luxury cruise ship, it is necessary to exchange the keys of multiple socket mechanical locks to obtain the upper-level keys, and then operate the mechanical locks of each switch cabinet in sequence to finally complete the power supply. This interlocking mechanism standardizes the operating process, avoids misoperation, and ensures the accuracy and safety of the shore power system operation.

[0014] 3. The mechanical lock of the present invention is fixed to the side of the socket by bolts, so as to adapt to sockets of different specifications, without the need for customized modification, reducing deployment costs, and supporting multiple key exchange levels (K1-K4) -K5-K6-K7, which is suitable for complex power systems and can flexibly cope with different voltage levels and equipment configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a stereoscopic diagram of the installation of a socket, a plug and a mechanical lock of a mechanical lock of the present invention; Figure 2 A schematic top view of a mechanical lock of the present invention; Figure 3 It is a cross-sectional schematic diagram of a mechanical lock of the present invention; Figure 4 A side view schematic diagram of a mechanical lock of the present invention; Figure 5 It is a left side schematic diagram of a mechanical lock of the present invention; Figure 6 It is a three-dimensional schematic diagram of a two-position exchange lock of a mechanical lock of the present invention; Figure 7 This is a schematic diagram of an explosion of a 1-bit logic exchange lock of a mechanical safety logic interlock of the present invention; Figure 8 It is a three-dimensional schematic diagram of a 1-bit logic exchange lock of a mechanical safety logic interlock of the present invention; Fig. 9 It is a three-dimensional schematic diagram of a multi-bit logic exchange lock of a mechanical safety logic interlock of the present invention; Fig.10 It is a three-dimensional cross-sectional schematic diagram of a multi-bit logic exchange lock of a mechanical safety logic interlock of the present invention; Fig.11 It is a schematic diagram of a logical first paddle and a logical second paddle of a mechanical safety logic interlock of the present invention; Fig.12 A schematic diagram of the logic relationship of power supply of a mechanical lock in a method for using a mechanical lock of the present invention; Fig.13 A schematic diagram of a locking process of a mechanical lock in a method for using a mechanical lock of the present invention; Fig.14 A schematic diagram of a mechanical lock unlocking process of a method for using a mechanical lock according to the present invention; Fig.15 A schematic diagram of the power supply logic relationship of a mechanical safety logic interlock of a method for using a mechanical safety logic interlock of the present invention; Fig.16 A schematic diagram of a power supply process of a mechanical safety logic interlock of a method for using a mechanical safety logic interlock of the present invention; Fig.17 The present invention is a schematic diagram of the unlocking process of the mechanical safety logic interlock K1-K4 of the method for using the mechanical safety logic interlock.

[0016] Among them, 1. Mechanical lock; 101. Mechanical lock seat; 102. Mechanical gasket; 103. Mechanical lock core; 104. Mechanical lock tongue; 105. Locking key; 106. Paddle; 2. Socket; 3. Plug; 4. Logical lock seat; 5. Logical lock tongue; 6. Logical first paddle; 7. Logical gasket; 8. Connecting sleeve; 9. Logical first key; 10. Logical second key; 11. Logical pin groove; 12. Logical second paddle; 13. Logical lock core. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Please refer to the attached Figure 1 -Attached Figure 6 , an embodiment of the present invention provides a mechanical lock, comprising: Socket 2, with a plug 3 installed on the top of the socket 2; Mechanical lock 1, the mechanical lock 1 is installed on the right side of the socket 2 by bolts, the mechanical lock 1 includes a mechanical lock seat 101, a mechanical washer 102 is fixedly connected to the top of the mechanical lock seat 101, the inner diameter of the mechanical washer 102 is rotatably connected to a mechanical lock core 103, the bottom of the mechanical lock core 103 is fixedly connected to a toggle piece 106, the inner diameter of the mechanical lock seat 101 is slidably connected to a mechanical lock tongue 104, a locking key 105 is slidably connected inside the mechanical lock core 103, and the toggle piece 106 is slidably connected to the mechanical lock tongue 104.

[0019] Socket 2 is used as a power access port, providing a connection position for plug 3 to realize the basic connection of power transmission in the shore power system. Plug 3 cooperates with socket 2 to introduce shore power into the power-consuming equipment. Its top-mounted design facilitates plug-in and unplug operations, ensuring the stability and convenience of the power transmission line; The mechanical lock 1 is installed on the right side of the socket 2 by bolts, providing a locking function for the connection between the plug 3 and the socket 2 to prevent accidental removal. The mechanical lock seat 101 serves as the supporting structure of the entire mechanical lock 1 and carries other components. The mechanical gasket 102 makes the mechanical lock cylinder 103 rotate more smoothly and reduces friction loss. The mechanical lock cylinder 103 rotates under the action of the locking key 105, driving the bottom toggle piece 106. The toggle piece 106 is connected to the mechanical lock tongue 104 by sliding, pushing the mechanical lock tongue 104 to extend or retract, thereby locking and unlocking the plug 3, ensuring that the plug 3 is firmly connected and preventing accidental detachment from causing safety accidents.

[0020] Please refer to the attached Figure 7 -Attached Fig.11 A mechanical safety logic interlock includes: a logic lock seat 4, a plurality of logic washers 7 are fixedly connected to the front side of the logic lock seat 4, the front ends of the plurality of logic washers 7 are fixedly connected to connecting sleeves 8, the inner diameters of the plurality of connecting sleeves 8 are rotatably connected to logic lock cores 13, the rear ends of the four logic lock cores 13 at the bottom are fixedly connected to logic first paddles 6, the insides of the four logic lock cores 13 at the bottom are slidably connected to logic first keys 9, a logic pin groove 11 is opened at the top of the logic lock seat 4, and a logic lock tongue 5 is slidably connected in the logic pin groove 11.

[0021] The logic gasket 7 reduces the friction when the logic lock cylinder 13 rotates, ensuring the rotation flexibility. The connecting sleeve 8 makes the logic lock cylinder 13 more firmly installed and can rotate flexibly. The four logic lock cylinders 13 at the bottom are used in conjunction with the logic first key 9. Rotating the logic first key 9 drives the logic lock cylinder 13 to rotate, and then drives the logic first paddle 6. The logic first paddle 6 pushes the logic lock tongue 5 to slide in the logic pin groove 11, thereby realizing the locking and unlocking control of the logic second key 10. Through this interlocking structure, the operating process is standardized to prevent misoperation.

[0022] A logical second key 10 is slidably connected inside the top logical lock cylinder 13 , a logical second paddle 12 is fixedly connected to the rear end of the top logical lock cylinder 13 , and both the logical first paddle 6 and the logical second paddle 12 are slidably connected to the logical lock tongue 5 .

[0023] When the logic second key 10 is rotated, the logic second paddle 12 participates in the position control of the logic lock tongue 5 through the sliding connection with the logic lock tongue 5, and cooperates with the bottom logic first paddle 6 to ensure that the logic lock tongue 5 moves according to the predetermined logic, ensuring that the logic second key 10 can only be pulled out when specific conditions are met, thereby realizing multi-level interlocking control and improving the operational safety of the shore power system.

[0024] Please refer to the attached Fig.12 -Attached Fig.14 , a method for using a mechanical lock, for a mechanical lock according to claim 1, wherein locking the socket 2 and the plug 3 comprises the following steps: Step 1: Confirm that the feeder cabinet is in the state of circuit breaker open, grounding knife closed, socket 2 is normal, all parts of mechanical lock 1 are intact and firmly installed, and mechanical lock 1 is in the initial state; Step 2: Accurately insert the plug 3 into the socket 2 to achieve electrical connection between the two; Accurately inserting the plug 3 to establish an electrical connection is the initial step of shore power transmission, ensuring that the plug 3 and the socket 2 fit closely to ensure stable power transmission and avoid arcing and heating problems caused by poor contact, which may affect the normal operation of electrical equipment and cause safety hazards; Step 3: Insert the locking key 105 into the mechanical lock core 103. At this time, the locking key 105 and the mechanical lock core 103 form a match. With the mechanical gasket 102 as the support point, rotate the locking key 105 clockwise or counterclockwise. As the locking key 105 rotates, the mechanical lock core 103 is driven to rotate together. Since the bottom of the mechanical lock core 103 is fixedly connected with a toggle piece 106, the toggle piece 106 will move with the rotation of the mechanical lock core 103; Insert and rotate the locking key 105, and use the cooperation between the mechanical lock core 103 and the locking key 105 and the support of the mechanical gasket 102 to achieve power transmission. Turning the locking key 105 drives the mechanical lock core 103 to rotate, and then drives the toggle piece 106 to prepare for pushing the mechanical lock tongue 104. Through this mechanical structure transmission, the locking operation of the plug 3 is achieved; Step 4: During the rotation of the toggle plate 106, the sliding connection structure between the toggle plate 106 and the mechanical lock tongue 104 enables the toggle plate 106 to push the mechanical lock tongue 104, and the mechanical lock tongue 104 slides in the inner diameter of the mechanical lock seat 101 and gradually extends out of the mechanical lock seat 101. When the mechanical lock tongue 104 extends to a certain position, it will cooperate with the corresponding locking structure on the plug 3 to clamp the plug 3; The sliding connection structure between the toggle piece 106 and the mechanical lock tongue 104 converts the circular motion of the toggle piece 106 into the linear motion of the mechanical lock tongue 104. After the mechanical lock tongue 104 is extended, it cooperates with the locking structure on the plug 3 to clamp the plug 3, thereby preventing the plug 3 from being accidentally pulled out, ensuring that the plug 3 is firmly connected to the socket 2, and avoiding safety accidents caused by the looseness of the plug 3 during power transmission; Step 5: Confirm that the mechanical lock tongue 104 has firmly stuck the plug 3 and the plug 3 is restricted on the socket 2 and cannot be easily pulled out, then pull out the locking key 105 from the mechanical lock core 103. At this time, the plug 3 has been locked on the socket 2. Insert the locking key 105 into the key exchange box, then withdraw the second locking key 105, and use the second locking key 105 to operate the second mechanical lock 1 installed at the ground knife of the high-opening cabinet. The lock pin retracts. At this time, the grounding knife can be operated to open the switch, and the second locking key 105 cannot be pulled out. Then open the grounding knife and close the circuit breaker. After waiting for the power supply to be completed, unlock and separate the socket 2 and the plug 3.

[0025] After confirming that plug 3 is securely locked, pull out the key to increase operational safety and prevent accidental unlocking. Insert the key exchange box to obtain the second key for subsequent operation of mechanical lock 1 at the grounding knife of the high-opening cabinet. Operate mechanical lock 1 to retract the lock pin, and then open the grounding knife to prepare for closing the circuit breaker. This process ensures shore power supply under safe conditions through key exchange and multi-device interlocking operations, avoiding the dangers of live operation.

[0026] The unlocking and separation of the socket 2 and the plug 3 includes the following steps: Step 1: Use the second locking key 105 to operate the second mechanical lock 1 installed at the grounding switch of the high-opening cabinet, extend the lock pin, open the circuit breaker again, close the grounding switch, and confirm that the surrounding environment is safe and there is no electrical safety hazard; Step 2: Re-insert the second locking key 105 into the key exchange box, then take out the locking key 105, and reinsert the locking key 105 into the mechanical lock cylinder 103 on the socket 2, so that the locking key 105 and the mechanical lock cylinder 103 are matched again; Putting the second key back into the exchange box and then taking out the original locking key is to follow the interlocking logic process, reinsert the locking key to cooperate with the mechanical lock cylinder 103, prepare for unlocking the plug 3, ensure that the unlocking operation is carried out in a predetermined order, and ensure the accuracy and safety of the operation; Step 3: Rotate the locking key 105 in the opposite direction to the locking direction, so as to drive the mechanical lock cylinder 103 to rotate, and then drive the bottom toggle piece 106 to rotate; The locking key 105 is rotated in the reverse direction, and the mechanical lock cylinder 103 and the toggle plate 106 are driven to rotate in the reverse direction through the mechanical structure transmission, providing power for pulling the mechanical lock tongue 104 back, and realizing the first step of unlocking the plug 3 according to the opposite mechanical action principle when locked; Step 4: During the rotation process, the toggle piece 106 pulls the mechanical lock tongue 104 through the sliding connection structure between the toggle piece 106 and the mechanical lock tongue 104, so that the mechanical lock tongue 104 slides back in the inner diameter of the mechanical lock seat 101 and gradually retreats into the mechanical lock seat 101; By utilizing the sliding connection between the toggle piece 106 and the mechanical lock tongue 104, the reverse rotation of the toggle piece 106 is converted into the reverse linear motion of the mechanical lock tongue 104, so that the mechanical lock tongue 104 is retracted, the lock on the plug 3 is released, and conditions are created for pulling out the plug 3; Step 5: When the mechanical lock tongue 104 is completely retracted and no longer blocks the plug 3, hold the plug 3 and smoothly pull it out from the top of the socket 2 to complete the operation of unlocking and pulling out the plug 3.

[0027] After confirming that the mechanical lock tongue 104 is fully retracted, pull out the plug 3 to ensure that the plug 3 is unlocked in place to avoid damaging the device by forcible unplugging. Pull out the plug 3 smoothly to ensure safe operation and complete the entire unlocking process to unlock the device to the initial detachable state.

[0028] Please refer to the attached Fig.15 -Attached Fig.17 , a method for using a mechanical safety logic interlock, used for a mechanical safety logic interlock according to any one of claims 2-3, comprising the following steps: Step 1: Multiple logical first keys 9 are K1, K2, K3, K4 from bottom to top and a logical second key 10 with a different top direction of K5. When the top logical second key 10 needs to be pulled out, the logical first key 9 is inserted into the corresponding logical lock cylinder 13 at the bottom in sequence; The corresponding relationship between each key and the lock core is clarified. Inserting the logical first key 9 in sequence is the starting operation to trigger the logical interlock. Through this orderly insertion method, the logical interlock mechanism is started to ensure that subsequent key operations can only be performed under a specific key operation sequence, thereby improving the safety and logic of the operation; Step 2: After inserting the selected key into the corresponding logic lock cylinder 13, turn the key clockwise or counterclockwise in sequence. Turning the logic first key will drive the logic lock cylinder 13 to rotate, and the logic first paddle 6 fixedly connected to the rear end of the logic lock cylinder 13 will rotate accordingly; The first logic key 9 is rotated to drive the first logic lock cylinder 13 and the first logic paddle 6 to realize mechanical power transmission. Through the cooperation between the first logic key 9 and the first logic lock cylinder 13, and the fixed connection between the first logic lock cylinder 13 and the first logic paddle 6, the rotational power is sequentially transmitted to provide power support for the subsequent action of the second logic lock tongue 5 and the unlocking of the second logic key 10; Step 3: As the logical first paddle 6 rotates, since they are in a sliding connection with the logical lock tongue 5, the paddle will push the logical lock tongue 5 to slide in the logical pin groove 11 during the rotation process, so that the originally locked logical second key 10 is unlocked, and then the logical second key 10 is turned, and the rotation drives the top logical lock cylinder 13 and the rear end logical second paddle 12 to rotate; The logic first paddle 6 pushes the logic lock tongue 5 to slide, changing the position of the logic lock tongue 5, thereby unlocking the logic second key 10, and rotating the logic second key 10 drives the top logic lock cylinder 13 and the logic second paddle 12 to rotate. Through the sliding connection between the logic first paddle 6 and the logic lock tongue 5, and the cooperation between the logic second key 10 and the top logic lock cylinder 13 and the logic second paddle 12, the key unlocking steps of the logic interlock are realized, ensuring that the operation is performed in a specific logic order; Step 4: At this time, the second logic key 10K5 can be pulled out from the top logic lock cylinder 13, and the first logic key 9K1-K4 is locked in the exchange box. Use key K5 to operate the mechanical lock installed at the ground knife of feeder cabinet AJ1, the lock pin retracts, and key K6 is withdrawn. At this time, the ground knife is operated to open the switch, and K5 cannot be pulled out. Pull out the second logic key 10K5 and lock the first logic key 9K1-K4 at the same time to realize key exchange and operation restriction. Use the pulled out key K5 to operate the mechanical lock at the AJ1 grounding knife of the feeder cabinet, retract the lock pin and disconnect the grounding knife. Through the coordinated work of the various components of the logic interlock, the standardization and safety of the operation process are ensured to avoid electrical accidents caused by misoperation. Step 5: Use key K6 to operate the mechanical lock installed at the grounding knife of feeder cabinet AJ2, the lock pin retracts, and key K7 is withdrawn. At this time, the grounding knife is operated to open the switch, and K6 cannot be pulled out. According to the ship's power supply system, select 11kV feeder cabinet AJ1 or 6.6kV feeder cabinet AJ2, and use key K7 to operate the mechanical lock installed at the circuit breaker trolley of one of the cabinets. The lock pin retracts, the circuit breaker trolley can be pushed to the working position, and K7 cannot be pulled out. After the status is confirmed, close the circuit breaker, and the shore-based power supply supplies power to the ship; Continue to use the key to operate the relevant mechanical locks of the feeder cabinet in sequence, gradually advance the preparation work for power transmission, select the appropriate feeder cabinet according to the ship's power supply system, operate the mechanical lock at the circuit breaker trolley to put the circuit breaker trolley in place, and close the circuit breaker to realize power supply after confirming the status. The whole process is through multi-level interlocking and condition judgment to ensure the safe and accurate shore power supply. According to the principle of logical interlocking, ensure that each step of operation complies with safety regulations; Step 6: When the interlocking state is unlocked by stopping power supply to the ship, the first logical key 9K1-K4 is unlocked by reversing the displacement path of the logical lock tongue.

[0029] Unlocking logic The first key 9K1-K4 unlocking includes the following steps: Step 1: After completing the power supply operation, return the circuit breaker trolley to the test position and open the circuit breaker, turn the key K7 counterclockwise to reset it, pull out K7 after the lock pin pops out, close the grounding switch, turn the key K6 counterclockwise to reset it, pull out K6 after the lock pin pops out, insert the top logic second key K5 into the corresponding lock cylinder, rotate it counterclockwise to drive the logic second paddle 12 to rotate in the opposite direction, so that the logic lock tongue 5 slides back to the initial position along the pin groove 11; After the power supply is completed, a series of reset operations are performed, the circuit breaker trolley is returned and the switch is opened, the grounding switch is restored to the closed state, the key is turned to reset the lock and pull it out, and then the second logic key K5 is inserted and rotated in the opposite direction, driving the second logic paddle 12 to return the logic lock tongue 5 to prepare for unlocking the first logic key 9K1-K4, ensuring that the operation is performed in sequence to unlock the initial interlock state of the equipment, and according to the reverse operation principle of the logic interlock, the equipment state is gradually unlocked; Step 2: Rotate the logical first keys K4, K3, K2, and K1 counterclockwise in reverse order to reset each logical first paddle 6 and release the thrust on the logical lock tongue 5; Reversely rotate the logic first key 9K4, K3, K2, K1 to reset the logic first paddle 6, release the thrust on the logic lock tongue 5, gradually unlock the position of the logic interlocking components, follow the logic opposite to the normal operation, create conditions for unlocking the logic first key 9K1-K4, and drive the logic first paddle 6 to rotate in the opposite direction through the cooperation of the logic first key 9 and the logic lock cylinder 13, thereby releasing the effect on the logic lock tongue 5 and returning the logic interlocking components to the initial state; Step 3: When all the logical lock tongues 5 are reset to the locked state, the logical first keys 9K1-K4 are automatically unlocked and can be pulled out one by one from the exchange box to complete the unlocking of the interlocking state.

[0030] The logic lock tongue 5 is reset to the locked state, triggering the logic first key 9K1-K4 to unlock, and can be pulled out from the exchange box, completing the unlocking of the entire interlocking state.

[0031] The key rotation angle is controlled by a mechanical limit structure. A 90° limit boss is provided on the inner wall of the logic lock cylinder 13, and a guide groove matching the limit boss is provided on the handle of the logic first key 9.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical lock, characterized in that: include: A socket (2), wherein a plug (3) is mounted on the top of the socket (2); A mechanical lock (1) is installed on the right side of a socket (2) by means of bolts. The mechanical lock (1) comprises a mechanical lock seat (101). A mechanical gasket (102) is fixedly connected to the top of the mechanical lock seat (101). A mechanical lock core (103) is rotatably connected to the inner diameter of the mechanical gasket (102). A toggle plate (106) is fixedly connected to the bottom of the mechanical lock core (103). A mechanical lock tongue (104) is slidably connected to the inner diameter of the mechanical lock seat (101). A locking key (105) is slidably connected to the inside of the mechanical lock core (103). The toggle plate (106) is slidably connected to the mechanical lock tongue (104).

2. A mechanical safety logic interlock, characterized in that: include: A logic lock seat (4), wherein a plurality of logic washers (7) are fixedly connected to the front side of the logic lock seat (4), the front ends of the plurality of logic washers (7) are fixedly connected to connecting sleeves (8), the inner diameters of the plurality of connecting sleeves (8) are rotatably connected to logic lock cylinders (13), the rear ends of the four logic lock cylinders (13) at the bottom are fixedly connected to logic first paddles (6), the interiors of the four logic lock cylinders (13) at the bottom are slidably connected to logic first keys (9), and a logic pin groove (11) is provided at the top of the logic lock seat (4), and a logic lock tongue (5) is slidably connected to the logic pin groove (11).

3. A mechanical safety logic interlock according to claim 2, characterized in that: The logic lock core (13) at the top is slidably connected to a logic second key (10) inside, the rear end of the logic lock core (13) at the top is fixedly connected to a logic second paddle (12), and both the logic first paddle (6) and the logic second paddle (12) are slidably connected to the logic lock tongue (5).

4. A method for using a mechanical lock, characterized in that: A mechanical lock according to claim 1, wherein locking the socket (2) and the plug (3) comprises the following steps: Step 1: Confirm that the feeder cabinet is in the state of circuit breaker open and grounding knife closed, the socket (2) is normal and all parts of the mechanical lock (1) are intact and firmly installed, and the mechanical lock (1) is in the initial state; Step 2: Accurately insert the plug (3) into the socket (2) to achieve electrical connection between the two; Step 3: Insert the locking key (105) into the mechanical lock core (103). At this time, the locking key (105) and the mechanical lock core (103) are matched. With the mechanical gasket (102) as a support point, the locking key (105) is rotated clockwise or counterclockwise. As the locking key (105) rotates, the mechanical lock core (103) is driven to rotate together. Since a toggle plate (106) is fixedly connected to the bottom of the mechanical lock core (103), the toggle plate (106) moves with the rotation of the mechanical lock core (103); Step 4: During the rotation of the toggle plate (106), the sliding connection structure between the toggle plate (106) and the mechanical lock tongue (104) enables the toggle plate (106) to push the mechanical lock tongue (104), and the mechanical lock tongue (104) slides in the inner diameter of the mechanical lock seat (101) and gradually extends out of the mechanical lock seat (101). When the mechanical lock tongue (104) extends to a certain position, it cooperates with the corresponding locking structure on the plug (3) to lock the plug (3); Step 5: After confirming that the mechanical lock tongue (104) has firmly locked the plug (3) and the plug (3) is restricted on the socket (2) and cannot be easily pulled out, pull out the locking key (105) from the mechanical lock core (103). At this time, the plug (3) has been locked on the socket (2). Insert the locking key (105) into the key exchange box, then withdraw the second locking key (105), and use the second locking key (105) to operate the second mechanical lock (1) installed at the ground knife of the high-opening cabinet. The lock pin retracts. At this time, the ground knife can be operated to open the switch, and the second locking key (105) cannot be pulled out. Then, the ground knife is opened and the circuit breaker is closed. After waiting for the power supply to be completed, the socket (2) and the plug (3) are unlocked and separated.

5. The method for using a mechanical lock according to claim 4, characterized in that: The unlocking and separation of the socket (2) and the plug (3) comprises the following steps: Step 1: Use the second locking key (105) to operate the second mechanical lock (1) installed at the grounding switch of the high-opening cabinet, extend the lock pin, open the circuit breaker again, close the grounding switch, and confirm that the surrounding environment is safe and there is no electrical safety hazard; Step 2: reinsert the second locking key (105) into the key exchange box, then take out the locking key (105), and reinsert the locking key (105) into the mechanical lock core (103) on the socket (2), so that the locking key (105) and the mechanical lock core (103) are matched again; Step 3: Rotate the locking key (105) in the opposite direction to the locking direction, so as to drive the mechanical lock core (103) to rotate, thereby driving the bottom push piece (106) to rotate; Step 4: During the rotation process, the toggle plate (106) pulls the mechanical lock tongue (104) through the sliding connection structure between the toggle plate (106) and the mechanical lock tongue (104), so that the mechanical lock tongue (104) slides back in the inner diameter of the mechanical lock seat (101) and gradually retreats into the interior of the mechanical lock seat (101); Step 5: When the mechanical lock tongue (104) is completely retracted and no longer blocks the plug (3), hold the plug (3) and smoothly pull it out from the top of the socket (2), thereby completing the operation of unlocking and pulling out the plug (3).

6. A method for using mechanical safety logic interlock, characterized in that: A mechanical safety logic interlock for use in any one of claims 2-3, comprising the following steps: Step 1: Multiple logical first keys (9) are K1, K2, K3, K4 from bottom to top and a logical second key (10) is K5 in a different direction at the top. When the top logical second key (10) needs to be pulled out, the logical first key (9) is inserted into the corresponding logical lock cylinder (13) at the bottom in sequence; Step 2: After inserting the selected key into the corresponding logic lock core (13), turn the key clockwise or counterclockwise in sequence. Turning the logic first key will drive the logic lock core (13) to rotate, and the logic first paddle (6) fixedly connected to the rear end of the logic lock core (13) will rotate accordingly; Step 3: As the logical first paddle (6) rotates, since they are in a sliding connection with the logical lock tongue (5), the paddle will push the logical lock tongue (5) to slide in the logical pin groove (11) during the rotation process, so that the originally locked logical second key (10) is unlocked, and then the logical second key (10) is turned, and the rotation drives the top logical lock cylinder (13) and the rear end logical second paddle (12) to rotate; Step 4: At this time, the second logic key (10) K5 can be pulled out from the top logic lock cylinder (13). The first logic key (9) K1-K4 is locked in the exchange box. Use key K5 to operate the mechanical lock installed at the AJ1 grounding knife of the feeder cabinet. The lock pin retracts and key K6 is withdrawn. At this time, the grounding knife is operated to open the switch, and K5 cannot be pulled out. Step 5: Use key K6 to operate the mechanical lock installed at the grounding knife of feeder cabinet AJ2, the lock pin retracts, and key K7 is withdrawn. At this time, the grounding knife is operated to open the switch, and K6 cannot be pulled out. According to the ship's power supply system, select 11kV feeder cabinet AJ1 or 6.6kV feeder cabinet AJ2, and use key K7 to operate the mechanical lock installed at the circuit breaker trolley of one of the cabinets. The lock pin retracts, the circuit breaker trolley can be pushed to the working position, and K7 cannot be pulled out. After the status is confirmed, close the circuit breaker, and the shore-based power supply supplies power to the ship; Step 6: When the interlocking state is unlocked by stopping power supply to the ship, the first logical key (9) K1-K4 is unlocked by reversing the displacement path of the logical lock tongue (5).

7. A method for using a mechanical safety logic interlock according to claim 6, characterized in that: The unlocking logic first key (9) K1-K4 unlocking comprises the following steps: Step 1: After the power supply operation is completed, return the circuit breaker trolley to the test position and open the circuit breaker, turn the key K7 counterclockwise to reset it, pull out K7 after the lock pin pops out, close the grounding switch, turn the key K6 counterclockwise to reset it, pull out K6 after the lock pin pops out, insert the top logic second key K5 into the corresponding lock cylinder, rotate it counterclockwise to drive the logic second paddle (12) to rotate in the opposite direction, so that the logic lock tongue (5) slides back to the initial position along the pin groove (11); Step 2: Rotate the logical first keys K4, K3, K2, and K1 counterclockwise in sequence to reset each logical first paddle (6) and release the thrust on the logical lock tongue (5); Step 3: When all the logical lock tongues (5) are reset to the locked state, the logical first keys (9) K1-K4 are automatically unlocked and can be pulled out one by one from the exchange box to complete the interlocking state unlocking.

8. The method for using a mechanical safety logic interlock according to claim 6, characterized in that: The key rotation angle is controlled by a mechanical limit structure, a 90° limit boss is provided on the inner wall of the logic lock core (13), and a guide groove cooperating with the limit boss is provided on the handle of the logic first key (9).

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