Electromechanical interlocking protection device for high-voltage power supply part of quay crane

Abstract

The utility model provides an electromechanical interlocking protection device for a high-voltage power supply part of a quay crane, which comprises a main mechanical lock arranged on a main safety door of main power supply equipment, and the main power supply equipment is connected with a plurality of auxiliary power supply equipment; the main key is used for being matched with the main mechanical lock; each auxiliary mechanical lock is arranged on an auxiliary safety door of the corresponding auxiliary power supply equipment; each auxiliary key is used for being correspondingly matched with one auxiliary mechanical lock, each auxiliary key and the corresponding auxiliary mechanical lock are provided with the same identifier, and the identifiers of the auxiliary keys are different; and the exchange type combined key box is arranged in the main power supply equipment, and the exchange type combined key box is used for being matched with the main key and the auxiliary keys. According to the electromechanical interlocking protection device provided by the utility model, the power transmission safety can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply equipment, and particularly relates to an electromechanical interlock protection device for the high-voltage power supply part of a quay crane. Background Art

[0002] The container quay crane (referred to as quay crane for short) is an important device for port terminal operations and is responsible for the loading and unloading of goods between land and ships. Since there are many electrical equipment on the quay crane, and their voltage levels are different and the functions achieved are also different. In order to reduce the loss in the power supply line, generally, the power supply of this device is mainly in the form of medium and high voltage. Specifically, the power supply circuit of the quay crane is as follows: the substation in the back yard of the terminal is connected to the high-voltage slip ring box on the quay crane, the high-voltage slip ring box on the quay crane is connected to the medium and high-voltage switch cabinet on the quay crane, the medium and high-voltage switch cabinet on the quay crane is connected to the main transformer on the quay crane, and the main transformer on the quay crane is connected to the auxiliary transformer on the quay crane. Generally, most accidents can be avoided by strictly following the specifications. However, in daily operations, due to non-standard operations of personnel, low safety protection awareness, poor AC communication during the power-on and power-off operations, and the lack or damage of protective measures, there are many potential safety hazards during the power-on process, which are likely to cause accidents such as high-voltage electric shock to personnel and equipment damage. Content of the Utility Model

[0003] In view of this, the utility model provides an electromechanical interlock protection device for the high-voltage power supply part of a quay crane, which can effectively improve the safety during the power-on of the high-voltage power supply part.

[0004] To solve at least one of the above technical problems, the utility model adopts the following technical solutions:

[0005] An electromechanical interlock protection device for the high-voltage power supply part of a quay crane according to an embodiment of the utility model includes:

[0006] A main mechanical lock, which is arranged on the main safety door of the main power supply device, and the main power supply device is connected to a plurality of auxiliary power supply devices;

[0007] A main key, which is used to cooperate with the main mechanical lock;

[0008] A plurality of auxiliary mechanical locks, each of which is respectively arranged on the auxiliary safety door of its corresponding auxiliary power supply device;

[0009] A plurality of auxiliary keys, each of which is used to cooperate with a corresponding auxiliary mechanical lock, and the same identifier is provided on each auxiliary key and its corresponding auxiliary mechanical lock, and the identifiers of each auxiliary key are all different;

[0010] A switching combined key box, which is arranged in the main power supply device and is used to cooperate with the main key and each auxiliary key;

[0011] Among them, the main key is used to be inserted and locked in the switched combined key box when the main power supply device is not powered, so as to exchange each secondary key in the switched combined key box. Each secondary key is used to be inserted and locked in the switched combined key box together when the main power supply device is not powered, so as to exchange the main key in the switched combined key box. Each secondary key is also used to be inserted into its corresponding secondary mechanical lock respectively when the main power supply device is not powered, so as to lock or unlock the secondary safety door.

[0012] The main key is also used to be inserted into the main mechanical lock to lock or unlock the main safety door. The main mechanical lock is used to unlock the main key when the main safety door is locked and the main power supply device is not powered, or to lock the main key when the main safety door is unlocked and the main power supply device is powered.

[0013] In an embodiment of the present utility model, the switched combined key box includes:

[0014] A first lock core, which is used to cooperate with the main key;

[0015] A plurality of second lock cores, and each secondary key is used to correspondingly cooperate with one second lock core;

[0016] Among them, the main key is used to be inserted and locked in the first lock core when the main power supply device is not powered, so as to exchange the secondary keys on each second lock core. Each secondary key is used to be inserted and locked in its corresponding second lock core together when the main power supply device is not powered, so as to exchange the main key on the first lock core.

[0017] In an embodiment of the present utility model, each secondary key and its corresponding second lock core have the same identifier, and the main key has an identifier and is different from the identifier of each secondary key.

[0018] In an embodiment of the present utility model, the identifier of the main key and the identifier of each secondary key are both numbers.

[0019] In an embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes:

[0020] A main electromagnetic door sucker, which is arranged in the main power supply device. The main electromagnetic door sucker is used to adsorb the main safety door when the main safety door is locked and the main power supply device is powered, or to release the main safety door when the main power supply device is not powered.

[0021] In an embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes:

[0022] An electromagnetic locking assembly is provided on the main mechanical lock. The electromagnetic locking assembly is used to lock the main key on the main mechanical lock when the main power supply device is powered, or to unlock the main key on the main mechanical lock when the main power supply device is not powered.

[0023] In an embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes:

[0024] A plurality of secondary electromagnetic door catches, each secondary electromagnetic door catch is respectively arranged in its corresponding secondary power supply device. Each secondary electromagnetic door catch is used to adsorb the secondary safety door when its corresponding secondary safety door is locked and its corresponding secondary power supply device is powered, or to release the secondary safety door when its corresponding secondary power supply device is not powered.

[0025] In an embodiment of the present utility model, a circuit breaker is connected between the main power supply device and its corresponding secondary power supply device.

[0026] In an embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes:

[0027] A main electromagnetic induction lamp is arranged in the main power supply device. The main electromagnetic induction lamp is used to turn on when the main power supply device is powered, or to turn off when the main power supply device is not powered.

[0028] In an embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes:

[0029] A plurality of secondary electromagnetic induction lamps are respectively arranged in their corresponding secondary power supply devices. Each secondary electromagnetic induction lamp is used to turn on when its corresponding secondary power supply device is powered on, or to turn off when its corresponding secondary power supply device is powered off.

[0030] At least one of the above technical solutions of the present utility model has the following beneficial effects:

[0031] The electromechanical interlock protection device for the high-voltage power supply part of the quay crane effectively improves the power transmission safety of the high-voltage power supply part of the quay crane. By setting up a switched combined key box, when the main power supply device and each sub-power supply device are in the power supply state, the main key is inserted and locked on the main mechanical lock, and each sub-key is inserted and locked in the switched combined key box together. Only when the main power supply device is not powered can the main key be removed from the main mechanical lock. When repairing each sub-power supply device, when the main power supply device is not powered, the main key can be inserted and locked in the switched combined key box to exchange each sub-key in the switched combined key box. Each sub-key can be inserted into its corresponding sub-mechanical lock at this time to lock or unlock the sub-safe door, and the sub-safe door of each sub-power supply device can only remove the sub-key after being locked, thus avoiding the situation where the sub-safe door is opened when the main power supply device is powered. When the main power supply device needs to be powered, each sub-key can be inserted and locked in the switched combined key box together to exchange the main key in the switched combined key box, and then the main key is inserted into the main mechanical lock of the main power supply facility, and then power supply is carried out. At this time, the sub-key cannot be used to open the sub-safe door. Brief Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of the electromechanical interlock protection device for the high-voltage power supply part of the quay crane in some embodiments of the present invention;

[0033] Figure 2 It is another schematic structural diagram of the electromechanical interlock protection device for the high-voltage power supply part of the quay crane in some embodiments of the present invention.

[0034] Reference Signs:

[0035] 100, main power supply device; 110, main safety door; 101, main mechanical lock; 102, main electromagnetic induction lamp;

[0036] 200, sub-power supply device; 210, sub-safe door; 201, sub-mechanical lock; 202, sub-electromagnetic induction lamp;

[0037] 300, switched combined key box; 310, first lock core; 320, second lock core;

[0038] 400, dock rear-yard substation; 402, substation electromagnetic induction lamp; 410, substation safety door; 420, substation key exchange box;

[0039] 500, high-voltage ring slide box; 502', sub-power supply device electromagnetic induction lamp; 510, ring slide box safety door;

[0040] 600, high-voltage switch cabinet; 610, switch cabinet safety door;

[0041] 700, Main transformer; 710, Main transformer safety door;

[0042] 800, Auxiliary transformer; 810, Auxiliary transformer safety door. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model fall within the scope of protection of the present utility model.

[0044] First, the electromechanical interlock protection device for the high-voltage power supply part of a quay crane according to an embodiment of the present utility model will be specifically described below with reference to the accompanying drawings.

[0045] Figure 1 The structural schematic diagram of the electromechanical interlock protection device for the high-voltage power supply part of a quay crane in some embodiments of the present utility model is shown. As Figure 1 shown, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane in the embodiment of the present utility model may include: a main mechanical lock 101, a main key, a plurality of auxiliary mechanical locks 201, a plurality of auxiliary keys, and a switched combined key box 300. Among them, the main mechanical lock 101 is provided on the main safety door 110 of the main power supply device 100, and the main power supply device 100 is connected to a plurality of auxiliary power supply devices 200. The main key is used to cooperate with the main mechanical lock 101. Each auxiliary mechanical lock 201 is respectively provided on the auxiliary safety door 210 of its corresponding auxiliary power supply device 200. Each auxiliary key is used to correspondingly cooperate with an auxiliary mechanical lock 201, and the same identifier is provided on each auxiliary key and its corresponding auxiliary mechanical lock 201, and the identifiers of each auxiliary key are all different. The switched combined key box 300 is provided in the main power supply device 100, and the switched combined key box 300 is used to cooperate with the main key and each auxiliary key. Among them, the main key is used to be inserted and locked in the switched combined key box 300 when the main power supply device 100 is not powered to exchange out each auxiliary key in the switched combined key box 300. Each auxiliary key is used to be inserted and locked in the switched combined key box 300 together when the main power supply device 100 is not powered to exchange out the main key in the switched combined key box 300. Each auxiliary key is also used to be inserted into its corresponding auxiliary mechanical lock 201 respectively when the main power supply device 100 is not powered to lock or unlock the auxiliary safety door 210. The main key is also used to be inserted into the main mechanical lock 101 to lock or unlock the main safety door 110. The main mechanical lock 101 is used to unlock the main key when the main safety door 110 is locked and the main power supply device 100 is not powered, or to lock the main key when the main safety door 110 is unlocked and the main power supply device 100 is powered.

[0046] In this embodiment, when the main power supply device 100 is not powered, the main key for controlling the power supply of the main power supply device 100 can be inserted and locked in the switchable combined key box 300 to exchange each secondary key, and then the operator checks each secondary power supply facility 200 one by one. After the inspection is completed, each secondary key can be used to lock the secondary safety door 210 in each secondary power supply device 200 through the secondary mechanical lock 201, so as to remove the secondary key corresponding to each secondary mechanical lock 201, and insert and lock them together in the switchable combined key box 300 to exchange the main key, and then insert the main key into the main mechanical lock 101 to unlock the main safety door 110 of the main power supply device 100, thereby powering on the main power supply facility. Thus, the power transmission safety is effectively improved. During maintenance, it is necessary to first cut off the power of the main power supply device 100, take out the main key and insert and lock it in the switchable combined key box 300 to unlock each secondary key, and then each secondary key can be used to unlock its corresponding secondary mechanical lock 201 to perform maintenance on each secondary power supply facility. Thus, the situation where there is still current in the circuit during maintenance can be avoided, and the safety is effectively improved.

[0047] In some other embodiments of the present utility model, the power supply switch inside the main safety door 110 is linked with the main key, that is, when the main key is inserted and the main mechanical lock 101 is opened, the power supply switch can be opened for power supply, and when the main key closes the main mechanical lock 101 and is pulled out, the power supply switch cannot be opened for power supply. In addition, the main mechanical lock 101 can unlock the main key when the main power supply device 100 is not powered and the main safety door 110 is locked, and can lock the main key when the main power supply device 100 is powered and the main safety door 110 is unlocked. That is to say, the main key can only be pulled out when the main power supply device 100 is not powered and the main safety door 110 is locked, and then inserted into the switchable combined key box 300 to unlock each secondary key. Thus, the situation of illegally using the main key to unlock the secondary key when the main power supply facility is still powered can be avoided, and the safety is effectively improved. Each secondary mechanical lock 201 can unlock its corresponding secondary key when its corresponding secondary safety door 210 is locked, and lock its corresponding secondary key when its corresponding secondary safety door 210 is unlocked. That is to say, only after the secondary safety doors 210 corresponding to each secondary power supply device 200 are locked can the corresponding secondary keys be pulled out and inserted into the switchable combined key box 300 to unlock the main key. Since the secondary keys corresponding to each secondary power supply device 200 can only be removed after the secondary safety doors 210 of each secondary power supply device 200 are locked, and the main key cannot be unlocked when any secondary key is not inserted into the switchable combined key box 300, the situation of using the main key to unlock the main safety door 110 for power supply when the secondary safety door 210 is not locked can be avoided, and the safety performance can be effectively improved.

[0048] In some other embodiments of the present utility model, each secondary key can be correspondingly matched with a secondary mechanical lock 201. Each secondary key and its corresponding secondary mechanical lock 201 have the same identifier, and the identifiers of each secondary key are all different. That is to say, each secondary key can only be inserted into and open its uniquely corresponding secondary mechanical lock 201, thereby avoiding safety problems caused by the chaotic use and misoperation of secondary keys.

[0049] As Figure 1 shown, the switchable combined key box 300 includes: a first lock core 310 and a plurality of second lock cores 320. Among them, the first lock core 310 is used to cooperate with the main key; each secondary key is used to correspondingly cooperate with a second lock core 320; the main key is used to be inserted into and locked in the first lock core 310 when the main power supply device 100 is not powered to exchange the secondary keys on each second lock core 320, and each secondary key is used to be inserted into and locked in its corresponding second lock core 320 together when the main power supply device 100 is not powered to exchange the main key on the first lock core 310.

[0050] That is to say, when the main key is inserted into and locked in the first lock core 310, each secondary key needs to be inserted into and locked in its corresponding second lock core 320 to unlock the main key. And when multiple secondary keys are inserted into and locked in their corresponding second lock cores 320, the main key needs to be inserted into and locked in the first lock core 310 to unlock each secondary key. Thus, the main key and the secondary keys are locked to each other, effectively improving the safety.

[0051] In an embodiment of the present utility model, each secondary key and its corresponding second lock core 320 have the same identifier, and the main key has an identifier and is different from the identifiers of each secondary key. That is to say, each secondary key can only be inserted into and locked in its uniquely corresponding second lock core 320, thereby avoiding safety problems caused by the chaotic use and misoperation of secondary keys.

[0052] In an embodiment of the present utility model, the identifier of the main key and the identifier of each secondary key are both numbers. For example, the number of the main key is A01, and the main key can only be inserted into the main mechanical lock 101 numbered A01 and the first lock core 310 numbered A01. And the number of one of the secondary keys is A05, then this secondary key can only be inserted into the secondary mechanical lock 201 numbered A05 and the second lock core 320 numbered A05. Thus, safety problems caused by the chaotic use and misoperation of secondary keys can be avoided.

[0053] In some other embodiments of the present utility model, when the main power supply device 100 is respectively connected to more than one power supply loop, different power supply loops may have different area numbers, such as power supply loop A, power supply loop B, etc. Correspondingly, the secondary keys and the secondary mechanical locks 201 in different power supply loops also have corresponding area numbers. For example, the number on one of the secondary keys in power supply loop A is A05, and the number of the secondary mechanical lock 201 uniquely corresponding to this secondary key in power supply loop A is also A05. And the number on one of the secondary keys in power supply loop B is B03, and the number of the secondary mechanical lock 201 uniquely corresponding to this secondary key in power supply loop B is also B03. Thus, it can be avoided that the operator uses the secondary key to open the secondary mechanical lock 201 in a non-corresponding power supply loop, thereby effectively improving the safety.

[0054] In one embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes: a main electromagnetic door catch (not shown), which is arranged in the main power supply device 100. The main electromagnetic door catch is used to adsorb the main safety door 110 when the main safety door 110 is locked and the main power supply device 100 is powered, or release the main safety door 110 when the main power supply device 100 is not powered. By setting the main electromagnetic door catch, on the basis of the mechanical lock, electrical secondary protection can be carried out, further improving the safety.

[0055] In one embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes: an electromagnetic locking assembly (not shown), which is arranged on the main mechanical lock 101. The electromagnetic locking assembly is used to lock the main key on the main mechanical lock 101 when the main power supply device 100 is powered, or release the locking of the main mechanical lock 101 on the main key when the main power supply device 100 is not powered. That is to say, the main key can only be pulled out when the main power supply device 100 is powered off and the main safety door 110 is locked. Thus, it can be avoided that when the main power supply device 100 is still powered, the main key is used illegally to unlock the secondary key, effectively improving the safety.

[0056] In one embodiment of the present utility model, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes: a plurality of secondary electromagnetic door catches, each of which is respectively arranged in its corresponding secondary power supply device 200. Each secondary electromagnetic door catch is used to adsorb the secondary safety door 210 when its corresponding secondary safety door 210 is locked and its corresponding secondary power supply device 200 is powered, or release the secondary safety door 210 when its corresponding secondary power supply device 200 is not powered. By setting the secondary electromagnetic door catches, on the basis of the mechanical lock, electrical secondary protection can be carried out, further improving the safety.

[0057] Such as Figure 1As shown, a circuit breaker is connected between the main power supply device 100 and the corresponding auxiliary power supply device 200. Specifically, when the main power supply facility is powered off, the circuit breaker between the main power supply device 100 and the corresponding auxiliary power supply device 200 can also be disconnected, thereby further avoiding electric shock accidents.

[0058] As Figure 1 shown, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane further includes: a main electromagnetic induction lamp 102 and a plurality of auxiliary electromagnetic induction lamps 202. Among them, the main electromagnetic induction lamp 102 is arranged in the main power supply device 100, and the main electromagnetic induction lamp 102 is used to turn on when the main power supply device 100 is powered, or turn off when the main power supply device 100 is not powered. The plurality of auxiliary electromagnetic induction lamps 202 are respectively arranged in their corresponding auxiliary power supply devices 200, and each auxiliary electromagnetic induction lamp 202 is used to turn on when its corresponding auxiliary power supply device 200 is powered, or turn off when its corresponding auxiliary power supply device 200 is powered off. Thus, the operator can be warned when the main power supply device 100 supplies power to the auxiliary power supply device 200, avoiding misoperation by the operator. In addition, the electromagnetic induction lamp can also be other display devices such as a flashing indicator or a buzzer.

[0059] The following Figure 2 further describes an electromechanical interlock protection device for the high-voltage power supply part of the quay crane according to an embodiment of the present invention. Figure 2 shows another structural schematic diagram of the electromechanical interlock protection device for the high-voltage power supply part of the quay crane in some embodiments of the present invention, as Figure 2As shown in the figure, the electromechanical interlock protection device for the high-voltage power supply part of the quay crane may include: main mechanical lock A01, main key A01, secondary mechanical locks A02, A03, A04, A05, secondary keys A02, A03, A04, A05, and substation key exchange box 420. Among them, the main mechanical lock is set on the substation safety door 410 of the quay rear substation 400, the secondary mechanical lock A02 is set on the ring slide box safety door 510 of the high-voltage ring slide box 500, the secondary mechanical lock A03 is set on the switchgear safety door 610 of the high-voltage switchgear 600, the secondary mechanical lock A04 is set on the main transformer safety door 710 of the main transformer 700, the secondary mechanical lock A05 is set on the secondary transformer safety door 810 of the secondary transformer 800, and the substation key exchange box 420 is set in the quay rear substation 400, and is respectively provided with first lock cores A01, second lock cores A02, A03, A04, A05 that are uniquely corresponding to the main key A01, secondary keys A02, A03, A04, A05. The quay rear substation 400 is connected to the high-voltage ring slide box 500 and the high-voltage switchgear 600 in sequence, and the high-voltage switchgear 600 is connected to the main transformer 700 and the secondary transformer 800. When power is supplied, the current in the quay rear substation 400 flows to the high-voltage ring slide box 500 and the high-voltage switchgear 600 in sequence, and then is sent to the main transformer 700 and the secondary transformer 800 respectively by the high-voltage switchgear 600.

[0060] In the initial state, the main key A01 is inserted and locked in the substation key exchange box 420. When power supply is required, the operator needs to check from the sides of the main transformer 700 and the secondary transformer 800, use the secondary mechanical locks A04 and A05 to lock the main transformer safety door 710 and the secondary transformer safety door 810 respectively, and remove the secondary keys A04 and A05. Then check the high-voltage switchgear 600, use the secondary mechanical lock A03 to lock the switchgear safety door 610, and remove the secondary key A03. Then check the high-voltage ring slide box 500, use the secondary mechanical lock A02 to lock the ring slide box safety door 510, and remove the secondary key A02. Then the secondary keys A02, A03, A04, and A05 can be inserted into the corresponding second lock cores on the substation key exchange box 420 together to unlock the main key A01. Then the operator uses the main key A01 to insert and open the main mechanical lock A01 to unlock the substation safety door 410 for power transmission operation. At this time, the substation electromagnetic induction lamp 402 in the quay rear substation 400 and the secondary power supply equipment electromagnetic induction lamps 502' respectively set in the high-voltage ring slide box 500, the high-voltage switchgear 600, the main transformer 700, and the secondary transformer 800 will light up together to prompt the operator that each device is in a live state at this time. Thus, the power transmission safety is effectively improved.

[0061] During maintenance, the operator can first cut off the power in the substation 400 in the backfield of the wharf. Then, after locking the safety door 410 of the substation, the main key A01 is taken out and inserted into the substation key exchange box 420 to unlock the secondary keys A02, A03, A04, and A05. The operator carries the corresponding secondary keys to perform maintenance on each secondary power supply equipment. At this time, since the substation 400 in the backfield of the wharf is in a power-off state, the operator can safely carry out maintenance operations.

[0062] Unless otherwise defined, the technical terms or scientific terms used in this utility model shall have the ordinary meanings understood by those of ordinary skill in the field to which this utility model belongs. The "first", "second" and similar terms used in this utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "a" or "an" do not denote a quantity limitation, but mean that there is at least one. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0063] The above are the preferred embodiments of this utility model. It should be noted that for those of ordinary skill in the technical field, without departing from the principle of this utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of this utility model.

Claims

1. An electromechanical interlocking protection device for the high voltage power supply part of a quay crane, characterized in that: include: A main mechanical lock, which is arranged on a main safety door of a main power supply device, and the main power supply device is connected to a plurality of auxiliary power supply devices; A master key, the master key is used to cooperate with the master mechanical lock; A plurality of secondary mechanical locks, each of which is respectively arranged on a secondary safety door of the secondary power supply device corresponding to the secondary mechanical lock; A plurality of secondary keys, each of which is used to correspond to one of the secondary mechanical locks, each of which has the same identification as its corresponding secondary mechanical lock, and each of which has a different identification; An exchangeable combination key box, the exchangeable combination key box is arranged in the main power supply device, and the exchangeable combination key box is used to cooperate with the main key and each of the secondary keys; Wherein, the master key is used to be inserted into and locked in the exchangeable combination key box when the main power supply device is not powered to exchange out each of the sub-keys in the exchangeable combination key box, each of the sub-keys is used to be inserted into and locked in the exchangeable combination key box when the main power supply device is not powered to exchange out the master key in the exchangeable combination key box, and each of the sub-keys is also used to be inserted into the corresponding sub-mechanical locks when the main power supply device is not powered to lock or unlock the sub-security door; The master key is also used to be inserted into the main mechanical lock to lock or unlock the main security door. The main mechanical lock is used to unlock the master key when the main security door is locked and the main power supply device is not powered, or to lock the master key when the main security door is unlocked and the main power supply device is powered.

2. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 1 is characterized in that: The exchangeable combination key box comprises: a first lock core, the first lock core being used to cooperate with the master key; A plurality of second lock cores, each of the secondary keys is used to match a corresponding second lock core; Among them, the main key is used to be inserted into and locked in the first lock core when the main power supply device is not powered to exchange the sub-keys on each of the second lock cores, and each of the sub-keys is used to be inserted and locked in the respective corresponding second lock cores when the main power supply device is not powered to exchange the master key on the first lock core.

3. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 2 is characterized in that: Each of the secondary keys and its corresponding second lock core have the same identification, and the main key has an identification which is different from the identification of each of the secondary keys.

4. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 3 is characterized in that: The identification of the master key and the identification of each of the secondary keys are numbers.

5. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 1 is characterized in that: Also includes: The main electromagnetic door suction is arranged in the main power supply device, and the main electromagnetic door suction is used to absorb the main safety door when the main safety door is locked and the main power supply device is powered, or to release the main safety door when the main power supply device is not powered.

6. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 1 is characterized in that: Also includes: An electromagnetic locking assembly is arranged on the main mechanical lock, and is used to lock the main key on the main mechanical lock when the main power supply device is supplying power, or to unlock the main key on the main mechanical lock when the main power supply device is not supplying power.

7. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 1 is characterized in that: Also includes: A plurality of auxiliary electromagnetic door suctions are provided, each of which is respectively arranged in the corresponding auxiliary power supply device, and each of which is used to absorb the auxiliary safety door when the corresponding auxiliary safety door is locked and the corresponding auxiliary power supply device is powered, or to release the auxiliary safety door when the corresponding auxiliary power supply device is not powered.

8. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 1 is characterized in that: A circuit breaker is connected between the main power supply device and the corresponding auxiliary power supply device.

9. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 8, characterized in that: Also includes: A main electromagnetic induction lamp is arranged in the main power supply device, and is used to turn on when the main power supply device supplies power, or to turn off when the main power supply device does not supply power.

10. The electromechanical interlocking protection device for the high voltage power supply part of the quay crane according to claim 8, characterized in that: Also includes: A plurality of auxiliary electromagnetic induction lamps are respectively arranged in the corresponding auxiliary power supply devices, and each of the auxiliary electromagnetic induction lamps is used to turn on when the corresponding auxiliary power supply device is powered on, or turn off when the corresponding auxiliary power supply device is powered off.

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