Double-control double-insurance threshold control system and use method thereof

Abstract

The invention discloses a double-control double-insurance threshold control system and a use method thereof, and relates to the technical field of double-insurance doors. The double-control double-insurance threshold control system comprises an upper boarding box, the upper boarding box comprises a request button, a voice reminder and a double-control knob, and the upper boarding box is installed on a handrail beside a boarding gate of an upper end beam of a crane. According to the double-control double-insurance threshold control system and the use method thereof, a double-control double-insurance control threshold is adopted, and a voice reminding function and automatic control of a boarding gate are matched, so that a crane action power supply can be effectively locked, and the safety in the boarding process is greatly improved; according to the voice reminding function, a crane driver can control the state of the boarding personnel in real time, and can select a safer area to assist the to-be-boarding personnel in safe and efficient boarding; automatic control of the boarding gate can avoid safety risks caused by inconvenient boarding, logic conditions are met, the boarding gate can be automatically opened and closed, and therefore unsafe behaviors in the boarding process are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of double safety doors, in particular to a double-control double safety threshold control system and a use method thereof. Background Art

[0002] The boarding threshold currently used only has simple functions such as answering and disconnecting the threshold. The driver cannot accurately judge the status of the personnel getting on and off the crane, and the personnel walk away directly after getting on and off the crane. The failure to close the threshold in time often causes the crane to fail to move. Due to continuous production on the production line, the driver needs to operate the crane for a long time. The driver will bring water cups, lunch boxes, and small spare parts on board during maintenance. Because the crane boarding door is about 2 meters above the plane, the boarding personnel need to climb the stairs to the boarding door, holding the railing and items with one hand and opening the door with the other hand, which poses safety risks and inconveniences.

[0003] The crane is erected on tracks on both sides. There are factory columns on the outside of the tracks. The distance between the crane and the factory columns is small. When people getting on and off the crane cannot establish reliable contact with the driver and the power supply of the trolley control cannot be effectively cut off, there is a greater safety risk. At this time, starting the crane will cause people to be crushed to death or injured. Such accidents are not uncommon.

[0004] "A request contact method and device for boarding a crane-type mobile device (authorization announcement number: CN102602813B)" The boarding personnel contact the driver through a wired boarding contact device. After the driver receives the boarding request signal, he sends a boarding consent prompt signal. After the boarding personnel receive the boarding consent signal, they start boarding; after the boarding personnel board, a boarding completion signal will be sent to complete the entire boarding request contact. This patent does not have a double protection mechanism. When the driver's boarding consent signal fails, the threshold relay cannot effectively lock and move, which poses a safety risk; according to its interlocking mechanism, after the driver agrees to board, the lock cannot be released until the boarding personnel complete boarding. At this time, if there is a special situation, the boarding personnel request to board and suddenly leave for an urgent matter, and the driver has sent a boarding permission signal. At this time, the car body is always in a locked state. The driver must climb from the driver's cab to the car body end beam and press the boarding completion button to release the lock. There is irrationality, which causes inconvenience to orderly production.

[0005] "A boarding request control circuit with interlocking function (authorization announcement number: CN216118467U)" This patent realizes signal transmission through the first switch, the second switch and the third switch respectively cooperating with the corresponding first sounding device, the second sounding device and the third sounding device to complete boarding. It only has a simple response system, which cannot cut off the action power supply from the source and cannot achieve intrinsic safety; the driver in the cab cannot determine the location of the boarding person and whether he is boarding; and there is the same problem as above, the driver needs to climb to the end beam and press the boarding completion button to release the voice reminder self-locking circuit.

[0006] The "Overhead Crane Boarding Intelligent Response Device (Authorization Announcement No.: CN220056099U)" receives the boarding request through the response system driver's cab, and the driver drives the overhead crane to the access control machine position. When the photoelectric sensor controlled by the photoelectric switch detects that the overhead crane appears at the boarding gate position, the magnetic lock is opened to open the access control machine to complete the boarding request. Boarding can only be completed at the designated position, which has limitations; it does not have a chain function, and the crane action power supply cannot be cut off during boarding, and it cannot be inherently safe.

[0007] "A Crane Safe Boarding System (Authorization Announcement No.: CN214879686U)" uses facial recognition at various dangerous locations to trigger the switch control to start the crane control system before it can operate. It is not suitable for boarding the crane during operation. Summary of the invention

[0008] 1. Technical issues to be solved

[0009] In view of the deficiencies in the prior art, the present invention provides a dual-control dual-safety threshold control system and a use method thereof, which solves the problems existing in the prior art.

[0010] (II) Technical solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dual-control dual-safety threshold control system, including an upper boarding box, the upper boarding box includes a request button 11, a voice reminder 12, and a dual-control knob 13, which is installed on the side railing of the boarding door of the upper end beam of the crane; the lower boarding box includes a request button 14, a voice reminder 15, and a dual-control knob 16, which is installed on the side of the ladder of the lower end beam of the crane. The voice reminder 12 and the voice reminder 15 are connected to the PLC slave station by wire or communication; the boarding door opening and closing is equipped with a door contact limit 17, a door control magnet 18, and a door control driver 19 at the hinge, which collects various control states to the PLC slave station by wire;

[0012] The double control knob 13 and the double control knob 16 are connected in a double control manner, wherein s1-1 and s1-2 are a set of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and s2-1 and s2-2 are a set of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station for locking the crane. In order to ensure the safe and reliable locking of the crane body and to ensure smooth boarding of passengers, a double insurance locking method is adopted here, s3-1 is a set of normally open contacts brought by the door contact limit 17, which can effectively lock the crane when the boarding door is opened, which is a complementary mechanism when the double control knobs 13 and 16 fail;

[0013] The system also includes interlocking contacts s1-3, s1-4, s2-3 and s2-4. The interlocking contacts s1-3 and s1-4 are a group of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and the interlocking contacts s2-3 and s2-4 are a group of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station to start the corresponding voice reminder. In order to ensure the effectiveness of the voice reminder, a double insurance control method is adopted here. The interlocking contact s3-2 is a group of normally closed contacts brought by the door contact limit 17. The opening of the boarding door can also trigger the voice reminder function, which is a complementary mechanism when the double control knobs 13 and 16 fail. When there are multiple doors, each door triggers the corresponding voice, which helps the driver to identify whether a boarding door is opened and the boarding status of the boarding personnel.

[0014] The crane driver's cab is equipped with a PLC master station 33 and a boarding box in the driver's cab, and the boarding box includes a boarding button 31 and a voice reminder 32. The boarding button 31 is connected to the PLC master station by wire, and the voice reminder 32 is connected to the PLC master station by communication. It has multiple voice reminder functions, which can help the crane driver to know which door the passengers to board from and the status of the boarding process.

[0015] Preferably, when there are multiple boarding gates, the signals collected by the respective double-control and double-insurance wiring are sent to the respective PLC slave stations. Through logical control, the collected signals are connected in series to control the locking of the crane body. At this time, if the crane main disk has lost power, the crane main disk is directly locked; if the crane main disk is in the power supply state, it means that its other mechanisms are operating. At this time, the crane trolley mechanism is locked so that the trolley cannot move. If the main disk is locked directly, other action mechanisms will suddenly lose power, causing them to be in an uncontrollable state, posing a safety risk.

[0016] A method for using a dual-control dual-safety threshold control system, characterized in that it includes the dual-control dual-safety threshold control system according to claim 1, and the specific operations are as follows:

[0017] The following example uses Gate A as an example, where someone requests to board the plane:

[0018] The person waiting to board presses the boarding box request button 14, and the driver's cab voice reminds that someone requests to board at Gate A. If the driver is busy with production and has no boarding time, the voice reminder will be cleared within the set time; if boarding is allowed, the driver will avoid the factory beam area according to the position of Gate A to provide a safe boarding environment for the boarding personnel. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow boarding. If the boarding personnel does not board within the valid time, the reminder will be automatically cleared. If they board again, they need to re-establish boarding contact to urge the boarding personnel to board efficiently; when they rotate the double control knob 16 within the valid time, the driver's cab reminds that the lower boarding threshold of Gate A is disconnected and the crane is locked, the boarding door access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding door, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The voice of the driver's cab reminds that the boarding door is open and someone is boarding. It is forbidden to move the crane. At this time, Gate A reminds you to close the boarding door in time. After the boarding personnel climb onto the crane, they rotate the double control knob 13 for the boarding box, and the door control driver 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control driver 19 stops working, and the voice reminder is released. The boarding personnel presses the boarding box request button 11, and the driver's cab voice reminds that the boarding is completed and the crane lock is released.

[0019] The following example uses Gate A as an example, where someone requests to get off:

[0020] The person waiting to get off presses the boarding box request button 11, and the driver's cab voice reminds that someone is requesting to get off at Gate A. If the driver is temporarily busy with production and is not allowed to get off, the voice reminder will be cleared within the set time; if the person is allowed to get off, the driver will avoid the factory beam area according to the position of Gate A to create a safe and efficient environment for the person getting off. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow the person to get off. If the person who is getting on does not get on within the valid time, the reminder will be automatically cleared. If the person who is getting off again needs to re-establish the contact for getting off, the person waiting to get off will be urged to get off efficiently and ensure efficient production; when the person rotates the double control knob 13 within the valid time, the driver's cab reminds the person to get off at Gate A after the upper boarding threshold is disconnected and the crane is locked, the boarding gate access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding gate, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The driver's cab voice reminds that Gate A is open and someone is getting off. It is forbidden to move the crane. At this time, Gate A reminds the person to close the boarding gate in time. After the disembarkation personnel have completed the disembarkation, they rotate the double control knob 16 for the lower boarding box, and the door control actuator 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control actuator 19 stops working, and the voice reminder is released. The boarding personnel press the lower boarding box request button 14, and the driver's cab voice reminds them that the disembarkation is completed and the crane lock is released.

[0021] (III) Beneficial effects

[0022] The present invention provides a dual-control dual-safety threshold control system and a method for using the same. It has the following beneficial effects:

[0023] The dual-control dual-safety threshold control system and its use method adopt dual-control dual-safety control thresholds, cooperate with voice reminder function and automatic control of boarding gate, can effectively lock the crane action power supply, and greatly improve the safety during boarding; according to the voice reminder function, the crane driver always controls the status of boarding personnel, and can select a safer area to assist the waiting passengers to board safely and efficiently; the automatic control of the boarding gate can avoid the safety risks of inconvenient boarding, and can automatically open and close the boarding gate when the logical conditions are met, thereby reducing unsafe behaviors during boarding;

[0024] Adopting the dual-control and dual-insurance control concept, a complementary interlocking mechanism is established. When one locking method fails, the other method can also reliably lock the crane, which can effectively ensure the safety of the passengers waiting to board.

[0025] It has a self-resetting function. When the driver issues an instruction to allow boarding or disembarking, if the boarding or disembarking passengers have not completed the corresponding actions, the system will automatically clear the voice reminder function. The driver does not need to climb to the boarding door to manually reset it, which improves operating efficiency.

[0026] The automated control of the boarding door makes it easy for people to get on and off the crane safely. According to the control logic, the boarding door can open automatically when the requirements are met. After boarding is completed, according to the voice prompt, after confirming that boarding is complete, the boarding door can close automatically and vibration is not easy to disengage.

[0027] Establish real-time contact status. According to the voice reminder function, the crane driver can know which door the person waiting to board is at, what the boarding or disembarking request is, and what position the person is at, to ensure the safety of the person waiting to board.

[0028] According to the location of the boarding gate where the passengers are, the crane driver can select a safer area to assist the passengers to board safely and efficiently.

[0029] The boarding gates use communication to reduce the use of a large number of hard wiring, reduce the workload of maintenance personnel, and shorten troubleshooting time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the control circuit of the present invention;

[0032] Figure 3 It is a schematic diagram of the boarding box of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments 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.

[0034] See also Figure 1-3 The present invention provides a technical solution: a dual-control dual-safety threshold control system, including an upper boarding box, the upper boarding box includes a request button 11, a voice reminder 12, and a dual-control knob 13, which is installed on the side railing of the boarding door of the upper end beam of the crane; the lower boarding box includes a request button 14, a voice reminder 15, and a dual-control knob 16, which is installed on the side of the ladder of the lower end beam of the crane. The voice reminder 12 and the voice reminder 15 are connected to the PLC slave station by wire or communication; the boarding door opening and closing is equipped with a door contact limit 17, a door control magnet 18, and a door control driver 19 at the hinge, which collects various control states to the PLC slave station by wire;

[0035] The double control knob 13 and the double control knob 16 are connected in a double control manner, wherein s1-1 and s1-2 are a set of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and s2-1 and s2-2 are a set of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station for locking the crane. In order to ensure the safe and reliable locking of the crane body and to ensure smooth boarding of passengers, a double insurance locking method is adopted here, s3-1 is a set of normally open contacts brought by the door contact limit 17, which can effectively lock the crane when the boarding door is opened, which is a complementary mechanism when the double control knobs 13 and 16 fail;

[0036] The system also includes interlocking contacts s1-3, s1-4, s2-3 and s2-4. The interlocking contacts s1-3 and s1-4 are a group of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and the interlocking contacts s2-3 and s2-4 are a group of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station to start the corresponding voice reminder. In order to ensure the effectiveness of the voice reminder, a double insurance control method is adopted here. The interlocking contact s3-2 is a group of normally closed contacts brought by the door contact limit 17. The opening of the boarding door can also trigger the voice reminder function, which is a complementary mechanism when the double control knobs 13 and 16 fail. When there are multiple doors, each door triggers the corresponding voice, which helps the driver to identify whether a boarding door is opened and the boarding status of the boarding personnel.

[0037] The crane driver's cab is equipped with a PLC master station 33 and a boarding box in the driver's cab, and the boarding box includes a boarding button 31 and a voice reminder 32. The boarding button 31 is connected to the PLC master station by wire, and the voice reminder 32 is connected to the PLC master station by communication. It has multiple voice reminder functions, which can help the crane driver to know which door the passengers to board from and the status of the boarding process.

[0038] When there are multiple boarding gates, the signals collected by the respective double-control and double-insurance wiring are sent to the respective PLC slave stations. Through logical control, the collected signals are connected in series to control the locking of the crane body. At this time, if the crane main disk has been powered off, the crane main disk will be directly locked; if the crane main disk is in the power supply state, it means that its other mechanisms are operating. At this time, the crane trolley mechanism is locked so that the trolley cannot move. If the main disk is locked directly, other action mechanisms will suddenly lose power, causing them to be in an uncontrollable state, posing a safety risk.

[0039] A method for using a dual-control dual-safety threshold control system includes the dual-control dual-safety threshold control system described above, and the specific operations are as follows:

[0040] The following example uses Gate A as an example, where someone requests to board the plane:

[0041] The person waiting to board presses the boarding box request button 14, and the driver's cab voice reminds that someone requests to board at Gate A. If the driver is busy with production and has no boarding time, the voice reminder will be cleared within the set time; if boarding is allowed, the driver will avoid the factory beam area according to the position of Gate A to provide a safe boarding environment for the boarding personnel. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow boarding. If the boarding personnel does not board within the valid time, the reminder will be automatically cleared. If they board again, they need to re-establish boarding contact to urge the boarding personnel to board efficiently; when they rotate the double control knob 16 within the valid time, the driver's cab reminds that the lower boarding threshold of Gate A is disconnected and the crane is locked, the boarding door access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding door, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The voice of the driver's cab reminds that the boarding door is open and someone is boarding. It is forbidden to move the crane. At this time, Gate A reminds you to close the boarding door in time. After the boarding personnel climb onto the crane, they rotate the double control knob 13 for the boarding box, and the door control driver 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control driver 19 stops working, and the voice reminder is released. The boarding personnel presses the boarding box request button 11, and the driver's cab voice reminds that the boarding is completed and the crane lock is released.

[0042] The following example uses Gate A as an example, where someone requests to get off:

[0043] The person waiting to get off presses the boarding box request button 11, and the driver's cab voice reminds that someone is requesting to get off at Gate A. If the driver is temporarily busy with production and is not allowed to get off, the voice reminder will be cleared within the set time; if the person is allowed to get off, the driver will avoid the factory beam area according to the position of Gate A to create a safe and efficient environment for the person getting off. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow the person to get off. If the person who is getting on does not get on within the valid time, the reminder will be automatically cleared. If the person who is getting off again needs to re-establish the contact for getting off, the person waiting to get off will be urged to get off efficiently and ensure efficient production; when the person rotates the double control knob 13 within the valid time, the driver's cab reminds the person to get off at Gate A after the upper boarding threshold is disconnected and the crane is locked, the boarding gate access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding gate, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The driver's cab voice reminds that Gate A is open and someone is getting off. It is forbidden to move the crane. At this time, Gate A reminds the person to close the boarding gate in time. After the disembarkation personnel have completed the disembarkation, they rotate the double control knob 16 for the lower boarding box, and the door control actuator 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control actuator 19 stops working, and the voice reminder is released. The boarding personnel press the lower boarding box request button 14, and the driver's cab voice reminds them that the disembarkation is completed and the crane lock is released.

[0044] Example:

[0045] This solution can be used for the boarding control system of a crane or mobile equipment with multiple boarding doors. The following description only takes one boarding door as an example.

[0046] The upper boarding box includes a request button 11, a voice reminder 12, and a double control knob 13, which are installed on the side railing of the boarding door on the upper end beam of the crane; the lower boarding box includes a request button 14, a voice reminder 15, and a double control knob 16, which are installed on the side of the ladder on the lower end beam of the crane. The voice reminder 12 and the voice reminder 15 are connected to the PLC slave station by wire or communication; the boarding door opening and closing is equipped with a door contact limit 17, a door control magnet 18, and a door control driver 19 at the hinge, which collects various control states to the PLC slave station by wire.

[0047] The crane body is locked, and the double control knob 13 and the double control knob 16 are connected in a double control manner, where s1-1 and s1-2 are a set of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and s2-1 and s2-2 are a set of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station to lock the crane. In order to ensure the safe and reliable locking of the crane body and ensure smooth boarding of passengers, a double insurance locking method is adopted here, and s3-1 is a set of normally open contacts brought by the door contact limit 17. The crane can be effectively locked even when the boarding door is opened. It is a complementary mechanism when the double control knobs 13 and 16 fail. When there are multiple boarding gates, the signals collected by the double-control and double-insurance wiring are sent to their respective PLC slave stations. Through logical control, the collected signals are connected in series to control the locking of the crane body. At this time, if the crane main panel has lost power, the crane main panel will be directly locked; if the crane main panel is in the power-supply state, it means that its other mechanisms are operating. At this time, the crane trolley mechanism is locked so that the trolley cannot move. If the main panel is locked directly, other action mechanisms will suddenly lose power, causing them to be in an uncontrollable state, posing a safety risk.

[0048] The crane voice interlock, s1-3, s1-4 is a set of interlocking contacts controlled by the double control knob 13 of the upper boarding box, s2-3, s2-4 is a set of interlocking contacts controlled by the double control knob 16 of the lower boarding box, this interlocking mechanism is sent to the PLC slave station to start the corresponding voice reminder. To ensure the effectiveness of the voice reminder, a double insurance control method is adopted here, s3-2 is a set of normally closed contacts with the door contact limit 17, and the opening of the boarding door can also trigger the voice reminder function, which is a complementary mechanism when the double control knobs 13 and 16 fail. When there are multiple doors, each door triggers the corresponding voice, which helps the driver to identify whether a boarding door is opened and the boarding status of the boarding personnel.

[0049] In order to ensure smooth communication between the passengers waiting to board and the driver, the crane driver's cab is equipped with a PLC master station 33 and a boarding box in the driver's cab, which includes a boarding button 31 and a voice reminder 32. The boarding button 31 is connected to the PLC master station by wire, and the voice reminder 32 is connected to the PLC master station by communication. It has multiple voice reminder functions, which can help the crane driver know which door the passengers waiting to board are boarding from and the status of the boarding process.

[0050] The following example uses Gate A as an example, where someone requests to board the plane:

[0051] The person waiting to board presses the boarding box request button 14, and the driver's cab voice reminds that someone requests to board at Gate A. If the driver is busy with production and has no boarding time, the voice reminder will be cleared within the set time; if boarding is allowed, the driver will avoid the factory beam area according to the position of Gate A to provide a safe boarding environment for the boarding personnel. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow boarding. If the boarding personnel does not board within the valid time, the reminder will be automatically cleared. If they board again, they need to re-establish boarding contact to urge the boarding personnel to board efficiently; when they rotate the double control knob 16 within the valid time, the driver's cab reminds that the lower boarding threshold of Gate A is disconnected and the crane is locked, the boarding door access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding door, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The voice of the driver's cab reminds that the boarding door is open and someone is boarding. It is forbidden to move the crane. At this time, Gate A reminds you to close the boarding door in time. After the boarding personnel climb onto the crane, they rotate the double control knob 13 for the boarding box, and the door control driver 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control driver 19 stops working, and the voice reminder is released. The boarding personnel presses the boarding box request button 11, and the driver's cab voice reminds that the boarding is completed and the crane lock is released.

[0052] The following example uses Gate A as an example, where someone requests to get off:

[0053] The person waiting to get off presses the boarding box request button 11, and the driver's cab voice reminds that someone is requesting to get off at Gate A. If the driver is temporarily busy with production and is not allowed to get off, the voice reminder will be cleared within the set time; if the person is allowed to get off, the driver will avoid the factory beam area according to the position of Gate A to create a safe and efficient environment for the person getting off. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow the person to get off. If the person who is getting on does not get on within the valid time, the reminder will be automatically cleared. If the person who is getting off again needs to re-establish the contact for getting off, the person waiting to get off will be urged to get off efficiently and ensure efficient production; when the person rotates the double control knob 13 within the valid time, the driver's cab reminds the person to get off at Gate A after the upper boarding threshold is disconnected and the crane is locked, the boarding gate access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding gate, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The driver's cab voice reminds that Gate A is open and someone is getting off. It is forbidden to move the crane. At this time, Gate A reminds the person to close the boarding gate in time. After the disembarkation personnel have completed the disembarkation, they rotate the double control knob 16 for the lower boarding box, and the door control actuator 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control actuator 19 stops working, and the voice reminder is released. The boarding personnel press the lower boarding box request button 14, and the driver's cab voice reminds them that the disembarkation is completed and the crane lock is released.

[0054] From the implementation effect, the present invention adopts double-control and double-insurance control thresholds, which can effectively ensure that the crane is in a locked state. Different parts are locked according to the state of the crane, providing a safe boarding environment for passengers waiting to board, while ensuring the safe operation of the crane; according to voice reminders, a real-time contact status is established, and the driver knows the location and status of passengers waiting to board, which can ensure the safety of passengers; the automated control of the boarding gate facilitates passengers to get on and off the crane safely. Communication control is adopted between each boarding gate to reduce hard-wired connections, reduce maintenance, and improve the stability of equipment operation, which can be widely promoted and used.

[0055] In summary, the dual-control dual-safety threshold control system and its use method adopt dual-control dual-safety control thresholds, cooperate with voice reminder function and automatic control of boarding gate, can effectively lock the crane action power supply, and greatly improve the safety during boarding; according to the voice reminder function, the crane driver always controls the status of boarding personnel, and can select a safer area to assist the waiting passengers to board safely and efficiently; the automatic control of the boarding gate can avoid the safety risks of inconvenient boarding, and can automatically open and close the boarding gate when logical conditions are met, thereby reducing unsafe behaviors during boarding;

[0056] Adopting the dual-control and dual-insurance control concept, a complementary interlocking mechanism is established. When one locking method fails, the other method can also reliably lock the crane, which can effectively ensure the safety of the passengers waiting to board.

[0057] It has a self-resetting function. When the driver issues an instruction to allow boarding or disembarking, if the boarding or disembarking passengers have not completed the corresponding actions, the system will automatically clear the voice reminder function. The driver does not need to climb to the boarding door to manually reset it, which improves operating efficiency.

[0058] The automated control of the boarding door makes it easy for people to get on and off the crane safely. According to the control logic, the boarding door can open automatically when the requirements are met. After boarding is completed, according to the voice prompt, after confirming that boarding is complete, the boarding door can close automatically and vibration is not easy to disengage.

[0059] Establish real-time contact status. According to the voice reminder function, the crane driver can know which door the person waiting to board is at, what the boarding or disembarking request is, and what position the person is at, to ensure the safety of the person waiting to board.

[0060] According to the location of the boarding gate where the passengers are, the crane driver can select a safer area to assist the passengers to board safely and efficiently.

[0061] The boarding gates use communication to reduce the use of a large number of hard wiring, reduce the workload of maintenance personnel, and shorten troubleshooting time.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0063] 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 dual-control dual-insurance threshold control system, characterized in that: It includes an upper boarding box, which includes a request button 11, a voice reminder 12, and a double control knob 13, which are installed on the side railing of the boarding door on the upper end beam of the crane; the lower boarding box includes a request button 14, a voice reminder 15, and a double control knob 16, which are installed on the side of the ladder of the lower end beam of the crane. The voice reminder 12 and the voice reminder 15 are connected to the PLC slave station by wire or communication; the boarding door opening and closing is equipped with a door contact limit 17, a door control magnet 18, and a door control driver 19 at the hinge, which collects various control states to the PLC slave station by wire; The double control knob 13 and the double control knob 16 are connected in a double control manner, wherein s1-1 and s1-2 are a set of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and s2-1 and s2-2 are a set of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station for locking the crane. In order to ensure the safe and reliable locking of the crane body and to ensure smooth boarding of passengers, a double insurance locking method is adopted here, s3-1 is a set of normally open contacts brought by the door contact limit 17, which can effectively lock the crane when the boarding door is opened, which is a complementary mechanism when the double control knobs 13 and 16 fail; The system also includes interlocking contacts s1-3, s1-4, s2-3 and s2-4. The interlocking contacts s1-3 and s1-4 are a group of interlocking contacts controlled by the double control knob 13 of the upper boarding box, and the interlocking contacts s2-3 and s2-4 are a group of interlocking contacts controlled by the double control knob 16 of the lower boarding box. This interlocking mechanism is sent to the PLC slave station to start the corresponding voice reminder. In order to ensure the effectiveness of the voice reminder, a double insurance control method is adopted here. The interlocking contact s3-2 is a group of normally closed contacts brought by the door contact limit 17. The opening of the boarding door can also trigger the voice reminder function, which is a complementary mechanism when the double control knobs 13 and 16 fail. When there are multiple doors, each door triggers the corresponding voice, which helps the driver to identify whether a boarding door is opened and the boarding status of the boarding personnel. The crane driver's cab is equipped with a PLC master station 33 and a boarding box in the driver's cab, and the boarding box includes a boarding button 31 and a voice reminder 32. The boarding button 31 is connected to the PLC master station by wire, and the voice reminder 32 is connected to the PLC master station by communication. It has multiple voice reminder functions, which can help the crane driver to know which door the passengers to board from and the status of the boarding process.

2. A dual-control dual-safety threshold control system according to claim 1, characterized in that: When there are multiple boarding gates, the signals collected by the respective double-control and double-insurance wiring are sent to the respective PLC slave stations. Through logical control, the collected signals are connected in series to control the locking of the crane body. At this time, if the crane main disk has been powered off, the crane main disk will be directly locked; if the crane main disk is in the power supply state, it means that its other mechanisms are operating. At this time, the crane trolley mechanism is locked so that the trolley cannot move. If the main disk is locked directly, other action mechanisms will suddenly lose power, causing them to be in an uncontrollable state, posing a safety risk.

3. A method for using a dual-control dual-insurance threshold control system, characterized in that: The dual-control and dual-safety threshold control system according to claim 1 is specifically operated as follows: The following example uses Gate A as an example, where someone requests to board the plane: The person waiting to board presses the boarding box request button 14, and the driver's cab voice reminds that someone requests to board at Gate A. If the driver is busy with production and has no boarding time, the voice reminder will be cleared within the set time; if boarding is allowed, the driver will avoid the factory beam area according to the position of Gate A to provide a safe boarding environment for the boarding personnel. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow boarding. If the boarding personnel does not board within the valid time, the reminder will be automatically cleared. If they board again, they need to re-establish boarding contact to urge the boarding personnel to board efficiently; when they rotate the double control knob 16 within the valid time, the driver's cab reminds that the lower boarding threshold of Gate A is disconnected and the crane is locked, the boarding door access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding door, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The voice of the driver's cab reminds that the boarding door is open and someone is boarding. It is forbidden to move the crane. At this time, Gate A reminds you to close the boarding door in time. After the boarding personnel climb onto the crane, they rotate the double control knob 13 for the boarding box, and the door control driver 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control driver 19 stops working, and the voice reminder is released. The boarding personnel presses the boarding box request button 11, and the driver's cab voice reminds that the boarding is completed and the crane lock is released. The following example uses Gate A as an example, where someone requests to get off: The person waiting to get off presses the boarding box request button 11, and the driver's cab voice reminds that someone is requesting to get off at Gate A. If the driver is temporarily busy with production and is not allowed to get off, the voice reminder will be cleared within the set time; if the person is allowed to get off, the driver will avoid the factory beam area according to the position of Gate A to create a safe and efficient environment for the person getting off. The driver presses the boarding permission button 31, and the voice of Gate A reminds the driver to allow the person to get off. If the person who is getting on does not get on within the valid time, the reminder will be automatically cleared. If the person who is getting off again needs to re-establish the contact for getting off, the person waiting to get off will be urged to get off efficiently and ensure efficient production; when the person rotates the double control knob 13 within the valid time, the driver's cab reminds the person to get off at Gate A after the upper boarding threshold is disconnected and the crane is locked, the boarding gate access control magnet 18 is released, the access control driver 19 reverses the operation to open the boarding gate, and the door contact limit 17 contact is changed from normally open to normally closed, and from normally closed to normally open. The driver's cab voice reminds that Gate A is open and someone is getting off. It is forbidden to move the crane. At this time, Gate A reminds the person to close the boarding gate in time. After the disembarkation personnel have completed the disembarkation, they rotate the double control knob 16 for the lower boarding box, and the door control actuator 19 rotates forward to close the boarding door. After it hits the door stop limit 17, the door control magnet 18 is attracted, the door control actuator 19 stops working, and the voice reminder is released. The boarding personnel press the lower boarding box request button 14, and the driver's cab voice reminds them that the disembarkation is completed and the crane lock is released.

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