Electric interlocking protection method, device and equipment for crane sling and liquid receiving tray

Abstract

The invention relates to the technical field of lifting appliance mechanical control, in particular to an electric interlocking protection method, device and equipment for a crane lifting appliance and a liquid receiving tray, and the electric interlocking protection method, device and equipment for the crane lifting appliance and the liquid receiving tray are characterized in that a first proximity switch and a second proximity switch which are connected in series sense that the liquid receiving tray reaches a liquid receiving tray opening position, the method comprises the steps of judging whether a trigger signal of a liquid receiving disc opening position is received or not; if the trigger signal is received, acquiring a first switching signal of the first proximity switch and a second switching signal of the second proximity switch, and judging whether the first switching signal or the second switching signal meets a preset failure condition or not; and if the first switching signal or the second switching signal meets the preset failure condition, stopping the descending action of the crane sling. Therefore, the problem that the liquid receiving disc is damaged due to the fact that the liquid receiving disc is not opened in place and the lifting appliance descends is solved, the maintenance cost is reduced, meanwhile, the equipment failure time is shortened, and the utilization rate of a production groove is increased.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical control of slings, and in particular to an electrical interlocking protection method, device and equipment for a crane sling and a liquid receiving tray. Background Art

[0002] With the rapid development of the domestic copper smelting industry, more and more electrolytic workshops are using large-scale production cranes dedicated to electrolytic discharging tanks. Since copper electrolysis is accompanied by a large amount of electrolyte dripping, the electrolytic cranes are designed with a large switchable liquid receiving tray.

[0003] In the related technology, the mainstream liquid receiving tray in China is of the crank arm connecting rod inclined pull-up type, which can catch the electrolyte while preventing the lifted materials from falling, thereby protecting the safety of personnel and equipment below.

[0004] However, the crane liquid collecting pan in the related technology will have a slight mechanical rebound when it is opened into place, and the signal may be lost after the opening position of the liquid collecting pan is triggered. At this time, the PLC (Programmable Logic Controller) cannot know the actual position of the liquid collecting pan, but the program has been turned on and the hoist will continue to descend, resulting in a collision and damage to the liquid collecting pan, which needs to be solved urgently. Summary of the invention

[0005] The present application provides an electrical interlocking protection method, device and equipment for a crane hoist and a liquid collection pan to solve the problem of damage to the liquid collection pan caused by the liquid collection pan not being fully opened and the descent of the hoist, thereby reducing maintenance costs and equipment failure time, and improving production tank utilization.

[0006] In a first aspect, an embodiment of the present application provides an electrical interlocking protection method for a crane hoist and a liquid receiving tray, wherein a first proximity switch and a second proximity switch connected in series sense that the liquid receiving tray reaches an open position of the liquid receiving tray, wherein the method comprises the following steps:

[0007] Determining whether a trigger signal for the liquid receiving tray to be in an open position is received;

[0008] If the trigger signal is received, obtaining a first switch signal of the first proximity switch and a second switch signal of the second proximity switch, and determining whether the first switch signal or the second switch signal satisfies a preset failure condition; and

[0009] If the first switch signal or the second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped.

[0010] According to an embodiment of the present application, after determining whether a trigger signal of the liquid receiving tray opening position is received, the method further includes:

[0011] If the trigger signal is not received, the lowering action of the crane hoist is directly stopped.

[0012] According to one embodiment of the present application, before directly stopping the descending action of the crane hoist, the method further includes:

[0013] Obtaining a duration during which the trigger signal is not received;

[0014] If the duration is longer than the preset duration, the lowering action of the crane hoist is directly stopped.

[0015] According to an embodiment of the present application, the preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

[0016] According to the electrical interlocking protection method of the crane hoist and the liquid receiving tray proposed in the embodiment of the present application, after receiving the trigger signal of the liquid receiving tray opening position, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch are obtained, and it is determined whether the first or second switch signal meets the preset failure condition. When the first or second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped. In this way, the problem of damage to the liquid receiving tray caused by the liquid receiving tray not being fully opened and the lowering of the hoist is solved, the maintenance cost is reduced, the equipment failure time is reduced, and the utilization rate of the production tank is improved.

[0017] A second aspect of the present application provides an electrical interlocking protection device for a crane hoist and a liquid receiving tray, wherein the liquid receiving tray is sensed to reach an open position of the liquid receiving tray by a first proximity switch and a second proximity switch connected in series, wherein the device comprises:

[0018] A judging module, used for judging whether a trigger signal of the opening position of the liquid receiving tray is received;

[0019] an acquisition module, configured to acquire a first switch signal of the first proximity switch and a second switch signal of the second proximity switch if the trigger signal is received, and determine whether the first switch signal or the second switch signal satisfies a preset failure condition; and

[0020] The control module is used to stop the lowering action of the crane hoist when the first switch signal or the second switch signal meets the preset failure condition.

[0021] According to an embodiment of the present application, after determining whether a trigger signal indicating that the liquid receiving tray is in the open position is received, the determination module is further configured to:

[0022] If the trigger signal is not received, the lowering action of the crane hoist is directly stopped.

[0023] According to one embodiment of the present application, before directly stopping the descending action of the crane hoist, the judgment module is further used to:

[0024] Obtaining a duration during which the trigger signal is not received;

[0025] If the duration is longer than the preset duration, the lowering action of the crane hoist is directly stopped.

[0026] According to an embodiment of the present application, the preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

[0027] According to the electrical interlocking protection device of the crane hoist and the liquid receiving tray proposed in the embodiment of the present application, after receiving the trigger signal of the liquid receiving tray opening position, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch are obtained, and it is determined whether the first or second switch signal meets the preset failure condition. When the first or second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped. In this way, the problem of damage to the liquid receiving tray caused by the descent of the crane due to the liquid receiving tray not being fully opened is solved, the maintenance cost is reduced, the equipment failure time is reduced, and the utilization rate of the production tank is improved.

[0028] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the electrical interlocking protection method for the crane hoist and the liquid receiving pan as described in the above embodiment.

[0029] The fourth aspect of the present application provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor to implement the electrical interlocking protection method of the crane hoist and the liquid receiving pan as described in the above embodiment.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0032] Figure 1 It is a flow chart of an electrical interlocking protection method for a crane hoist and a liquid receiving tray provided according to an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of an optimization procedure 1 according to an embodiment of the present application;

[0034] Figure 3 is a schematic diagram of an optimization procedure 2 according to an embodiment of the present application;

[0035] Figure 4 is a schematic diagram of an optimization procedure 3 according to an embodiment of the present application;

[0036] Figure 5 is a schematic diagram of an optimization procedure 4 according to an embodiment of the present application;

[0037] Figure 6 A timing relationship diagram according to an embodiment of the present application;

[0038] Figure 7 It is a block diagram of an electrical interlocking protection device for a crane hoist and a liquid receiving pan according to an embodiment of the present application;

[0039] Figure 8 Schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0041] The following describes the electrical interlocking protection method, device and equipment of the crane hoist and the liquid receiving pan according to the embodiment of the present application with reference to the accompanying drawings. In view of the problem of damage to the liquid receiving pan caused by the descent of the crane due to the failure of the liquid receiving pan to be fully opened mentioned in the above background technology, the present application provides an electrical interlocking protection method of the crane hoist and the liquid receiving pan, which senses the liquid receiving pan to reach the open position of the liquid receiving pan through a first proximity switch and a second proximity switch connected in series. In this method, after receiving the trigger signal of the open position of the liquid receiving pan, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch are obtained, and it is determined whether the first or second switch signal meets the preset failure condition. When the first or second switch signal meets the preset failure condition, the descent action of the crane hoist is stopped. In this way, the problem of damage to the liquid receiving pan caused by the failure of the liquid receiving pan to be fully opened and the descent of the crane is solved, the maintenance cost is reduced, the equipment failure time is reduced, and the utilization rate of the production tank is improved.

[0042] Specifically, Figure 1 A flow chart of an electrical interlocking protection method for a crane hoist and a liquid receiving pan provided in an embodiment of the present application.

[0043] like Figure 1As shown, the electrical interlocking protection method of the crane hoist and the liquid receiving tray senses the liquid receiving tray to reach the liquid receiving tray open position through a first proximity switch and a second proximity switch connected in series, wherein the method includes the following steps:

[0044] In step S101, it is determined whether a trigger signal of the liquid receiving tray opening position is received.

[0045] Specifically, if Figure 2 As shown, the embodiment of the present application defines an anti-collision point M806.4 in the program, which is a trigger signal for the liquid receiving tray to be in the open position, and is used to detect whether the liquid receiving tray is in the open position normally. When the liquid receiving tray is not in the open position, M806.4 is energized, the normally closed point is opened, and the crane hoist cannot descend, thereby avoiding damage to the liquid receiving tray caused by the liquid receiving tray not being in the open position and the hoist descending.

[0046] In step S102, if a trigger signal is received, a first switch signal of the first proximity switch and a second switch signal of the second proximity switch are acquired, and it is determined whether the first switch signal or the second switch signal meets a preset failure condition.

[0047] In some embodiments, the preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

[0048] Specifically, if Figure 3 As shown, in the embodiment of the present application, a second proximity switch and a limit stop are newly provided next to the first proximity switch (i.e., the original open position proximity switch), and the second proximity switch is connected to the PLC and connected in series with the first proximity switch in the program. When a trigger signal of the open position of the liquid receiving tray is received, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch can be obtained first, and it is determined whether the first or second switch signal meets the preset failure condition, that is, it is determined whether the first proximity switch or the second proximity switch is in a damaged state.

[0049] In step S103, if the first switch signal or the second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped.

[0050] Specifically, when the first or second switch signal meets the preset failure condition, that is, one of the proximity switches is in a damaged state (failed), the spreader will detect that the liquid receiving pan is not in the open position, thereby stopping the crane spreader from descending.

[0051] It can be seen that connecting two proximity switches in series can eliminate the abnormal lowering of the crane hoist due to the failure of one switch, eliminate the risk of the liquid collection tray being crushed, and ensure the safety of the crane equipment.

[0052] Furthermore, in some embodiments, after determining whether a trigger signal for the liquid receiving pan to be in the open position is received, the method further includes: if no trigger signal is received, directly stopping the descending action of the crane hoist.

[0053] It can be understood that, in the embodiment of the present application, if the trigger signal of the liquid receiving tray opening position is not received, the crane hoist can be directly stopped from descending.

[0054] Furthermore, in some embodiments, before directly stopping the lowering action of the crane hoist, the method further includes: obtaining a duration during which no trigger signal is received; if the duration is greater than a preset duration, directly stopping the lowering action of the crane hoist.

[0055] The preset duration may be a duration pre-set by a user, a duration obtained through a limited number of experiments, or a duration obtained through a limited number of computer simulations, and is not specifically limited here.

[0056] Combination Figure 4 , Figure 5 As shown, the embodiment of the present application optimizes the program, and program segments 38 and 39 work together to add a delay filter (i.e., a preset duration). Even if the trigger signal is not received, further judgment is required to avoid misoperation, i.e., whether the duration of not receiving the trigger signal is greater than the preset duration. If so, the crane hoist can be directly stopped from descending, otherwise the hoist continues to descend, thereby preventing the hoist from stopping abnormally due to power failure in the open position caused by jitter or other reasons during the descent of the hoist, thereby increasing the stability of the equipment operation.

[0057] Specifically, Figure 4 M806.1 derived from program segment 38 takes its rising edge signal I134.1. As long as it detects that the liquid receiving tray changes from the open position to the not-open position, the timer T500 starts timing and sets a delay of 1s (which can be adjusted later according to actual conditions). After 1s, T500 is turned on with a delay. When the liquid receiving tray is closed, T500 does not work (reset). When jitter occurs, M806.1 changes from power-off to power-on, and T500 gets the signal to start working. After 1s, T500 is powered on. Therefore, Figure 5M806.1 in program segment 39 is suddenly energized and turned on, but T500 needs to be delayed for 1 second to turn on. During this 1 second, the newly defined anti-collision point M806.4 (replacing the original M806.1) is in a power-off state. Within 1 second after shaking (the time when the liquid receiving tray is not in the open position due to shaking must be less than 1 second), the liquid receiving tray returns to the open position, and M806.1 changes from normally closed when energized to normally open when de-energized. Although the rising edge signal of M806.1 continues to be turned on in segment 38 due to the shaking of T500 and remains normally closed, the signal has not been transmitted to M806.4 and is still in a power-off state. Therefore, M806.4 has been in a power-off state during the whole process. Figure 2 M806.4 in the program is always kept as a normally closed point (the timing relationship is as follows Figure 6 As shown), the spreader descends normally. If there is a spreader rising signal during this period, this program will not work.

[0058] To facilitate those skilled in the art to further understand the electrical interlocking protection method for the crane hoist and the liquid collection pan proposed in the embodiment of the present application, the advantages of the electrical interlocking protection method for the crane hoist and the liquid collection pan of the embodiment of the present application compared with the current method are briefly introduced below.

[0059] Specifically, before adopting the electrical interlocking protection method of the crane hoist and the liquid collection tray of the embodiment of the present application, two imported cranes in the electrolysis area experienced abnormal lowering of the hoist and crushing of the liquid collection tray 5 times, with an average processing time of 6 hours.

[0060] However, after adopting the electrical interlocking protection method of the crane hoist and the liquid receiving tray of the embodiment of the present application, similar faults have not occurred since then. Every 6-hour delay in power supply for two groups saves about 9 tons of copper and greatly reduces capital investment.

[0061] According to the electrical interlocking protection method of the crane hoist and the liquid receiving tray proposed in the embodiment of the present application, after receiving the trigger signal of the liquid receiving tray opening position, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch are obtained, and it is determined whether the first or second switch signal meets the preset failure condition. When the first or second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped. In this way, the problem of damage to the liquid receiving tray caused by the liquid receiving tray not being fully opened and the lowering of the hoist is solved, the maintenance cost is reduced, the equipment failure time is reduced, and the utilization rate of the production tank is improved.

[0062] Next, the electrical interlocking protection device for the crane hoist and the liquid receiving pan according to the embodiment of the present application will be described with reference to the accompanying drawings.

[0063] Figure 7 It is a block diagram of an electrical interlocking protection device for a crane hoist and a liquid receiving pan according to an embodiment of the present application.

[0064] like Figure 7As shown, the electrical interlocking protection device 10 between the crane hoist and the liquid receiving pan senses the liquid receiving pan to reach the open position of the liquid receiving pan through a first proximity switch and a second proximity switch connected in series, wherein the device 10 includes: a judgment module 100, an acquisition module 200 and a control module 300.

[0065] The judging module 100 is used to judge whether a trigger signal of the opening position of the liquid receiving tray is received;

[0066] an acquisition module 200, for acquiring a first switch signal of the first proximity switch and a second switch signal of the second proximity switch if a trigger signal is received, and determining whether the first switch signal or the second switch signal satisfies a preset failure condition; and

[0067] The control module 300 is used to stop the lowering action of the crane hoist when the first switch signal or the second switch signal meets a preset failure condition.

[0068] Further, in some embodiments, after determining whether a trigger signal indicating that the liquid receiving tray is in the open position is received, the determination module 100 is further configured to:

[0069] If no trigger signal is received, the lowering action of the crane hoist will be stopped directly.

[0070] Furthermore, in some embodiments, before directly stopping the descending action of the crane hoist, the judging module 100 is further configured to:

[0071] Get the duration of not receiving the trigger signal;

[0072] If the duration is longer than the preset time, the lowering action of the crane will be stopped directly.

[0073] Furthermore, in some embodiments, the preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

[0074] It should be noted that the aforementioned explanation of the embodiment of the electrical interlocking protection method for the crane hoist and the liquid collecting pan is also applicable to the electrical interlocking protection device for the crane hoist and the liquid collecting pan of this embodiment, and will not be repeated here.

[0075] According to the electrical interlocking protection device of the crane hoist and the liquid receiving tray proposed in the embodiment of the present application, after receiving the trigger signal of the liquid receiving tray opening position, the first switch signal of the first proximity switch and the second switch signal of the second proximity switch are obtained, and it is determined whether the first or second switch signal meets the preset failure condition. When the first or second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped. In this way, the problem of damage to the liquid receiving tray caused by the descent of the crane due to the liquid receiving tray not being fully opened is solved, the maintenance cost is reduced, the equipment failure time is reduced, and the utilization rate of the production tank is improved.

[0076] Figure 8 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. The electronic device may include:

[0077] A memory 801 , a processor 802 , and a computer program stored in the memory 801 and executable on the processor 802 .

[0078] When the processor 802 executes the program, the electrical interlocking protection method between the crane hoist and the liquid receiving tray provided in the above embodiment is implemented.

[0079] Furthermore, the electronic device further comprises:

[0080] The communication interface 803 is used for communication between the memory 801 and the processor 802 .

[0081] The memory 801 is used to store computer programs that can be executed on the processor 802 .

[0082] The memory 801 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0083] If the memory 801, the processor 802 and the communication interface 803 are implemented independently, the communication interface 803, the memory 801 and the processor 802 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 8 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0084] Optionally, in a specific implementation, if the memory 801, the processor 802 and the communication interface 803 are integrated on a chip, the memory 801, the processor 802 and the communication interface 803 can communicate with each other through an internal interface.

[0085] The processor 802 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0086] The embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the electrical interlocking protection method of the crane hoist and the liquid receiving pan as described above is implemented.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0089] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0090] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0091] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An electrical interlocking protection method for a crane hoist and a liquid receiving tray, characterized in that: The liquid receiving tray is sensed to reach an open position of the liquid receiving tray by a first proximity switch and a second proximity switch connected in series, wherein the method comprises the following steps: Determining whether a trigger signal for the liquid receiving tray to be in an open position is received; If the trigger signal is received, obtaining a first switch signal of the first proximity switch and a second switch signal of the second proximity switch, and determining whether the first switch signal or the second switch signal satisfies a preset failure condition; and If the first switch signal or the second switch signal meets the preset failure condition, the lowering action of the crane hoist is stopped.

2. The method according to claim 1, characterized in that After determining whether a trigger signal indicating that the liquid receiving tray is in the open position is received, the method further includes: If the trigger signal is not received, the lowering action of the crane hoist is directly stopped.

3. The method according to claim 2, characterized in that Before directly stopping the descending action of the crane hoist, the method further includes: Obtaining a duration during which the trigger signal is not received; If the duration is longer than the preset duration, the lowering action of the crane hoist is directly stopped.

4. The method according to any one of claims 1 to 3, characterized in that The preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

5. An electrical interlocking protection device for a crane hoist and a liquid receiving tray, characterized in that: The liquid receiving tray is sensed to reach an open position of the liquid receiving tray by a first proximity switch and a second proximity switch connected in series, wherein the device comprises: A judging module, used for judging whether a trigger signal of the opening position of the liquid receiving tray is received; an acquisition module, configured to acquire a first switch signal of the first proximity switch and a second switch signal of the second proximity switch if the trigger signal is received, and determine whether the first switch signal or the second switch signal satisfies a preset failure condition; and The control module is used to stop the lowering action of the crane hoist when the first switch signal or the second switch signal meets the preset failure condition.

6. The device according to claim 5, characterized in that After determining whether a trigger signal indicating that the liquid receiving tray is in the open position is received, the determining module is further configured to: If the trigger signal is not received, the lowering action of the crane hoist is directly stopped.

7. The device according to claim 6, characterized in that Before directly stopping the descending action of the crane hoist, the judging module is further used to: Obtaining a duration during which the trigger signal is not received; If the duration is longer than the preset duration, the lowering action of the crane hoist is directly stopped.

8. The device according to any one of claims 5 to 7, characterized in that: The preset failure condition is that the first proximity switch or the second proximity switch is in a damaged state.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the electrical interlocking protection method for a crane hoist and a liquid receiving tray as described in any one of claims 1 to 4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: The program is executed by a processor to implement the electrical interlocking protection method of a crane hoist and a liquid receiving tray as described in any one of claims 1 to 4.

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