Discharging auxiliary device

Abstract

The utility model relates to an unloading auxiliary device which comprises an oil pipe, a first sensor, a first support, a gas conveying pipe, a second sensor, a second support, a material conveying bag, a third sensor, a key box and a controller, and the oil pipe, the gas conveying pipe and the material conveying bag are all used for assisting a tank truck in unloading. The first sensor is used for detecting whether the oil pipe is located on the first support. The second sensor is used for detecting whether the gas conveying pipe is located on the second support or not. An induction piece is arranged on the material conveying bag, and the third inductor is used for detecting whether the induction piece is within a set range or not; the key box comprises a box body, a box cover and an electromagnetic lock, and the electromagnetic lock is used for locking the box body and the box cover; the controller comprises a logic gate circuit, the first inductor, the second inductor and the third inductor are all connected with the input end of the logic gate circuit, and the output end of the logic gate circuit is electrically connected with the electromagnetic lock. The device provided by the utility model prevents a driver from forgetting to disassemble the oil pipe, the gas conveying pipe and the material conveying bag, and avoids dragging accidents caused by misoperation.

Description

Technical Field

[0001] This utility model relates to an unloading auxiliary device. Background Technology

[0002] The PTA feedstock for the polyester plant is supplied via tank truck unloading. Before unloading, hydraulic hoses need to be connected, and a hydraulic pump is used to lift the tank truck. The rear of the tank truck is connected to the unloading port of the plant's chain conveyor using a flexible bag connector. Furthermore, to prevent bridging and unloading obstructions, a gas delivery pipeline needs to be connected and continuously filled. The plant has a large capacity, unloading up to 36 PTA tank trucks daily. With multiple PTA tank truck suppliers and frequent driver changes, coupled with continuous PTA unloading day and night, driver fatigue can lead to accidents where drivers forget to disconnect the hydraulic hoses, gas delivery pipelines, and flexible bag connectors before starting the vehicle and driving away. These accidents can easily cause large-scale hydraulic oil and PTA dust leaks, damage to unloading equipment, and personnel injuries, posing a significant safety hazard. Utility Model Content

[0003] The purpose of this invention is to provide an auxiliary device for unloading materials.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An unloading auxiliary device includes an oil pipe, a first sensor, a first support, a gas delivery pipe, a second sensor, a second support, a material delivery bag, a third sensor, a key box, and a controller. The oil pipe, gas delivery pipe, and material delivery bag are all used to assist tank truck unloading.

[0006] The oil pipe is used to connect to the hydraulic drive components on the tank truck. The first sensor is located at the oil pipe and is used to detect whether the oil pipe is located on the first support.

[0007] The gas delivery pipe is connected to the tank body of the tank truck for delivering gas to the tank body. The second sensor is installed at the gas delivery pipe and is used to detect whether the gas delivery pipe is located on the second support.

[0008] The conveying bag is used to communicate with the tank body of the tank truck. The conveying bag is equipped with a sensor. The third sensor is located at the conveying bag and is used to detect whether the sensor is within a set range.

[0009] The key box is used to hold the car key of the tanker truck. The key box includes a box body, a box cover, and an electromagnetic lock. The electromagnetic lock is used to lock the box body and the box cover together.

[0010] The controller includes a logic gate circuit. The first sensor, the second sensor, and the third sensor are all connected to the input terminal of the logic gate circuit, and the output terminal of the logic gate circuit is electrically connected to the electromagnetic lock.

[0011] According to some embodiments of this utility model, the logic gate circuit is a three-input NAND gate, the first sensor is connected to the first input terminal of the three-input NAND gate, the second sensor is connected to the second input terminal of the three-input NAND gate, and the third sensor is connected to the third input terminal of the three-input NAND gate.

[0012] According to some embodiments of this utility model, the electromagnetic lock is disposed on the lower side of the box body, and a suction plate is provided on the box cover. When the electromagnetic lock is energized, the suction plate is attracted to the electromagnetic lock; when the electromagnetic lock is de-energized, the suction plate is separated from the electromagnetic lock.

[0013] According to some embodiments of this utility model, a viewing window is provided on the box body.

[0014] According to some embodiments of this utility model, one end of the oil pipe is provided with an oil pipe joint, and the first sensor is used to detect the oil pipe joint; and / or, the first bracket is provided with a through hole for one end of the oil pipe to pass through.

[0015] According to some embodiments of the present invention, the device further includes an oil storage container located on one side of the first support, the oil storage container being used to receive hydraulic oil flowing out from one end of the oil pipe.

[0016] According to some embodiments of this utility model, one end of the gas delivery pipe is provided with a gas pipe connector, and the second sensor is used to detect the gas pipe connector.

[0017] According to some embodiments of this utility model, the second support includes an upright beam and a crossbeam. The upright beam is vertically arranged, and the crossbeam is perpendicular to the upright beam. The crossbeam has a slot for engaging the gas delivery pipe, and the opening of the slot is recessed from one end of the crossbeam toward the other end. The second sensor is disposed on the crossbeam and located at the other end of the crossbeam. When the gas delivery pipe is engaged in the slot of the gas delivery pipe, the gas pipe connector is located on the crossbeam.

[0018] According to some embodiments of this utility model, the sensing element is provided with sensing points, and the third sensor is used to sense the sensing points on the sensing element.

[0019] According to some embodiments of this utility model, the sensing element includes a connector and a sensing plate. The connector is used to connect the sensing plate to the conveying bag. The connector includes a first connecting plate, a second connecting plate, and a third connecting plate. One end of the first connecting plate is connected to the conveying bag, and the other end of the first connecting plate is connected to one end of the second connecting plate and perpendicular to it. The third connecting plate is connected to the other end of the second connecting plate and perpendicular to it. The sensing plate is connected to the third connecting plate.

[0020] According to some embodiments of this utility model, the first sensor, the second sensor, and the third sensor are all photoelectric sensors.

[0021] According to some embodiments of this utility model, the device further includes three signal lights, which are connected to the controller. The three signal lights correspond to the first sensor, the second sensor, and the third sensor, respectively.

[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0023] The unloading auxiliary device provided by this utility model can prevent tank truck drivers from forgetting to disassemble oil pipes, gas delivery pipes, and material bags, achieving intelligent error prevention and avoiding vehicle towing accidents caused by human error. Attached Figure Description

[0024] Appendix Figure 1 Structural diagrams of the unloading auxiliary device and tank truck provided by this utility model;

[0025] Appendix Figure 2 Structural diagram of the oil pipe, first sensor, first support, and oil storage container of the unloading auxiliary device provided by this utility model;

[0026] Appendix Figure 3 A side view of the gas delivery pipe, the second sensor, and the second support of the unloading auxiliary device provided by this utility model;

[0027] Appendix Figure 4 A front view of the gas delivery pipe, second sensor, and second support of the unloading auxiliary device provided by this utility model;

[0028] Appendix Figure 5 For the appendix Figure 4 Enlarged view of the endotracheal connector;

[0029] Appendix Figure 6 A top view of the second support of the unloading auxiliary device provided by this utility model;

[0030] Appendix Figure 7Front view of the third sensor and the third bracket of the unloading auxiliary device provided by this utility model;

[0031] Appendix Figure 8 Structural diagram of the material conveying bag and connecting parts of the unloading auxiliary device provided by this utility model;

[0032] Appendix Figure 9 A top view of the connector and sensing element of the unloading auxiliary device provided by this utility model;

[0033] Appendix Figure 10 A side view of the connector and sensor of the unloading auxiliary device provided by this utility model;

[0034] Appendix Figure 11 A structural diagram of the key box of the unloading auxiliary device provided by this utility model in the open state;

[0035] Appendix Figure 12 A structural diagram of the key box of the unloading auxiliary device provided by this utility model in a locked state;

[0036] Appendix Figure 13 A schematic diagram of the three-input NAND gate provided by this utility model;

[0037] Appendix Figure 14 The logic table for the three-input NAND gate provided by this utility model.

[0038] In the attached diagrams above:

[0039] 1-Oil pipe; 2-First sensor; 3-Oil storage container; 4-First support; 5-Oil pipe connector; 6-Support component; 7-Gas delivery pipe; 8-Second sensor; 9-Second support; 91-Crossbeam; 92-Upright beam; 10-Feed bag; 11-Third support; 12-Gas main pipe; 13-Third sensor; 14-Fourth support; 141-Upright pole; 142-Fixing plate; 15-Sensing plate; 16-Connector; 1 61-First connecting piece, 162-Second connecting piece, 163-Third connecting piece; 17-Key box, 171-Box body, 172-Box cover, 173-Electromagnetic lock, 174-Suction plate, 175-Viewing window, 176-Door opening / closing lever, 177-Mounting hole; 18-Tank truck; 19-Outrigger; 20-Baffle; 21-Air pipe connector; 22-Hydraulic pump; 23-Chain hose machine; 24-Extension plate; 25-Connecting ring. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] See Figures 1 to 12 The tanker truck unloading auxiliary device shown includes an oil pipe 1, a first sensor 2, a first support 4, a gas delivery pipe 7, a second sensor 8, a second support 9, a material delivery bag 10, a third sensor 13, a key box 17, and a controller. The oil pipe 1, gas delivery pipe 7, and material delivery bag 10 are all used to assist in the unloading of the polyester PTA tanker truck 18.

[0043] One end of the oil pipe 1 is used to connect to the hydraulic drive unit on the tank truck, and the other end of the oil pipe 1 is used to connect to the oil supply unit. A hydraulic pump 22 is installed between the other end of the oil pipe 1 and the oil supply unit. The hydraulic oil enters the hydraulic drive unit through the hydraulic pump 22 and the oil pipe 1. The hydraulic drive unit is used to drive one end of the tank of the tank truck to move in the vertical direction, so that the tank of the tank truck is tilted to facilitate unloading into the storage bin. The first sensor 2 is installed at the oil pipe 1. The first sensor 2 is used to detect whether the oil pipe 1 is located on the first support 4.

[0044] One end of the gas delivery pipe 7 is used to connect to the tank body of the tank truck, and the other end of the gas delivery pipe 7 is used to connect to the gas supply unit. Gas is delivered into the tank through the gas delivery pipe 7 of the gas supply unit. The gas is preferably nitrogen to prevent material bridging in the tank. By introducing nitrogen into the tank, unloading is smooth. The second sensor 8 is set at the gas delivery pipe 7. The second sensor 8 is used to detect whether the gas delivery pipe 7 is on the second support 9.

[0045] One end of the conveying bag 10 is used to connect to the discharge port of the tanker truck, and the other end of the conveying bag 10 is connected to the inlet of the storage silo through the chain conveyor 23. The conveying bag 10 is conveyed by a soft material, preferably a cloth bag. The chain conveyor 23 is used to control the opening and closing of the conveying bag 10. A sensor is provided at one end of the conveying bag 10, and a third sensor 13 is provided at the conveying bag 10. The third sensor 13 is used to detect whether the sensor is within the set range.

[0046] The key box 17 is used to store the tanker truck's keys. The key box 17 includes a box body 171, a box cover 172, and an electromagnetic lock 173. The box body 171 has a receiving space, which is an open space on one side and closed space on the other. The box cover 172 is located on the open side of the box body 171 to close the box body 171. The electromagnetic lock 173 is used to lock the box body 171 and the box cover 172. The electromagnetic lock 173 is connected to a controller.

[0047] The controller includes logic gate circuits. The digital signals generated by the first sensor 2, the second sensor 8, and the third sensor 13 are all input to the logic gate circuits, and the output of the logic gate circuits is electrically connected to the electromagnetic lock 173. When the controller receives the detection signals from the first sensor 2, the second sensor 8, and the third sensor 13, it opens the key box 17, allowing the key to be retrieved.

[0048] The logic gate is a three-input NAND gate. The first sensor 2 is connected to the first input terminal of the three-input NAND gate, the second sensor 8 is connected to the second input terminal, and the third sensor 13 is connected to the third input terminal. (See also...) Figure 13 A, B, and C correspond to the first sensor 2, the second sensor 8, and the third sensor 13, respectively, and F corresponds to the electromagnetic lock 173.

[0049] When oil pipe 1 is on the first support 4 and gas delivery pipe 7 is on the second support 9, and the sensors are within the set range, the first sensor 2, the second sensor 8, and the third sensor 13 input a high level (1) to the three-input NAND gate, the three-input NAND gate outputs 0, the electromagnetic lock 173 is de-energized, and the key box 17 opens. If oil pipe 1 is not on the first support 4, gas delivery pipe 7 is not on the second support 9, and the sensors are not within the set range, the first sensor 2, the second sensor 8, and the third sensor 13 input a low level (0) to the three-input NAND gate, the three-input NAND gate outputs 1, the electromagnetic lock 173 is energized, and the key box 17 closes. If any one of the three components—oil pipe 1, gas delivery pipe 7, and sensor—is in a negative state (for oil pipe 1, negative means oil pipe 1 is not located on the first support 4; for gas delivery pipe 7, negative means gas delivery pipe 7 is not located on the second support 9; for sensor, negative means sensor is not within the set range), then the three-input NAND gate outputs 1, the electromagnetic lock 173 is energized, and the key box 17 is closed. An example of this is: oil pipe 1 is not located on the first support 4, gas delivery pipe 7 is located on the second support 9, the sensor is within the set range, the three-input NAND gate outputs 1, the electromagnetic lock 173 is energized, and the key box 17 is closed.

[0050] The operation method of the unloading auxiliary device in this example is as follows: After the tanker truck driver arrives at the unloading area, he first puts the vehicle key into the magnetic lock key box 17. Then the driver takes out the oil pipe 1, the gas delivery pipe 7, and the material bag 10. At this time, the first sensor 2 cannot detect the oil pipe 1, the second sensor 8 cannot detect the gas delivery pipe 7, and the third sensor 13 cannot detect the material bag 10. The key box 17 is locked, and the vehicle key cannot be taken out of the key box 17. Then the oil pipe 1 is connected to the hydraulic drive component, the gas delivery pipe 7 is connected to the tank body of the tanker truck, and the material bag 10 is connected to the discharge port of the tank body of the tanker truck. Unloading begins.

[0051] After unloading is complete, the driver sequentially disconnects the oil pipe 1, gas delivery pipe 7, and material bag 10. The oil pipe 1 and gas delivery pipe 7 are then placed on the first support 4 and the second support 9, respectively, and the material bag 10 is placed within a designated area. At this point, the first sensor 2 detects the oil pipe 1, the second sensor 8 detects the gas delivery pipe 7, and the third sensor 13 detects the material bag 10. The key box 17 unlocks and opens, allowing the driver to retrieve the vehicle key. This system prevents tanker truck drivers from forgetting to disconnect the oil pipe 1, gas delivery pipe 7, and material bag 10, achieving intelligent error prevention and avoiding vehicle towing accidents caused by human error.

[0052] In this example, an electromagnetic lock 173 is provided on the lower side of the box body 171, and a suction plate 174 is provided on the box cover 172. When the electromagnetic lock 173 is energized, the suction plate 174 is attracted to the electromagnetic lock 173, and the key box 17 is closed; when the electromagnetic lock 173 is de-energized, the suction plate 174 is separated from the electromagnetic lock 173, and the key box 17 is opened.

[0053] In some embodiments, the housing 171 has a viewing window 175 to allow the operator to observe the tanker truck key from the outside. In some embodiments, the housing 171 has a mounting hole 177, through which fasteners (expansion bolts) are inserted to connect the key box 17 to a supporting surface, such as a wall.

[0054] The first sensor 2, the second sensor 8, and the third sensor 13 are all photoelectric sensors, each with a sensing probe. The photoelectric sensor mainly consists of an emitting light source, a light medium, a photoelectric element, and a measuring resistor. When working normally, it emits light, which passes through the light medium and is directly or reflected onto the photoelectric receiver. The photoelectric power switch on the receiver then converts the light signal into an electrical signal, which is then processed by the measuring circuit and output as a signal.

[0055] The device also includes an alarm connected to the controller. The controller triggers the alarm based on the detection results of the first sensor 2, the second sensor 8, and the third sensor 13. The device also includes three indicator lights connected to the controller. Each indicator light corresponds to one of the first sensor 2, the second sensor 8, and the third sensor 13. If all three indicator lights are lit, it indicates that the oil pipe 1 is located on the first bracket 4, the gas delivery pipe 7 is located on the second bracket 9, and the sensors are within the set range; in this case, the key box 17 is in the open state. If any one of the three indicator lights is not lit, it indicates that any one of the three components—oil pipe 1, gas delivery pipe 7, or the sensor—is in a negative state; in this case, the key box 17 is in the closed state, and the sensor detection results can be obtained through the indicator lights. The controller, indicator lights, and alarm can all be located inside the electrical control box. The electrical control box is connected to a 24V power supply via a cable.

[0056] In this example, one end of the oil pipe 1 is provided with an oil pipe joint 5. The first sensor 2 is used to detect the oil pipe joint 5. The oil pipe 1 is relatively long, and the oil pipe joint 5 serves as a sensing component to facilitate detection by the first sensor 2. A through hole is provided on the first bracket 4 for one end of the oil pipe 1 to pass through, and the through hole extends in the vertical direction.

[0057] The device also includes a support member 6, which supports the first sensor 2 and can be connected to the first bracket 4. The support member 6 includes a horizontal plate and a support plate. The horizontal plate is connected to the first bracket 4, and the support plate is mounted on the horizontal plate. The support plate is L-shaped, and the first sensor 2 is mounted on the support plate.

[0058] The device also includes an oil storage container 3, which is located on one side of the first support 4. The oil storage container 3 is used to receive hydraulic oil flowing out from one end of the oil pipe 1. When the oil pipe 1 is installed on the first support 4, the hydraulic oil remaining in the oil pipe 1 will flow into the oil storage container 3 to prevent the hydraulic oil from flowing to the ground and causing an accident. In some embodiments, the oil storage container 3 has a receiving space that is open on one side and closed on the other side.

[0059] In some embodiments, the device further includes multiple legs 19 connected to the bottom of the oil storage container 3, preferably four legs 19. The legs 19 extend vertically, and a reinforcing rod is provided between adjacent legs 19 to enhance the support of the oil storage container 3.

[0060] In this example, one end of the gas delivery pipe 7 is provided with a gas pipe connector 21. The second sensor 8 is used to detect whether the gas pipe connector 21 is located on the second support 9. The gas delivery pipe 7 is relatively long, and the gas pipe connector 21 serves as a sensing component to facilitate detection by the second sensor 8.

[0061] In this example, both the oil pipe connector 5 and the air pipe connector 21 are quick connectors, which are commonly used structural components.

[0062] In some embodiments, the second bracket 9 is used to support the gas delivery pipe 7, and the second sensor 8 is disposed on the second bracket 9. The second bracket 9 includes a vertical beam 92 and a horizontal beam 91. The vertical beam 92 is vertically arranged, and the horizontal beam 91 is perpendicular to the vertical beam 92. A slot is provided on the horizontal beam 91, and the opening of the slot is recessed from one end of the horizontal beam 91 towards the other end of the horizontal beam 91. When used to hold the gas delivery pipe 7, the gas delivery pipe 7 is partially held in the slot to fix the gas delivery pipe 7. The second sensor 8 is disposed on the horizontal beam 91 and located at the other end of the horizontal beam 91. When the gas delivery pipe 7 is engaged in the slot of the gas delivery pipe 7, the gas pipe connector 21 is disposed on the horizontal beam 91, and the second sensor 8 is opposite to the gas pipe connector 21. When the second sensor 8 detects the gas pipe connector 21, it indicates that the gas delivery pipe 7 is disposed on the second bracket 9. If the second sensor 8 does not detect the gas pipe connector 21, it indicates that the gas delivery pipe 7 is not disposed on the second bracket 9.

[0063] Preferably, an extension plate 24 is provided on the upper surface of the end of the crossbeam 91 where the slot is formed, see [reference]. Figure 6 There are two extension plates 24, which are located on the front and rear sides of the crossbeam 91 respectively. The extension plates 24 are semi-circular, which can better support the air pipe connector 21.

[0064] More preferably, a baffle 20 is provided on the upper surface of the crossbeam 91 away from the vertical beam 92, the baffle 20 can prevent the air pipe connector 21 from disengaging from the slot. The baffle 20 can be arc-shaped.

[0065] The device also includes a gas main pipe 12 and a third support 11. The gas supply unit is connected to the gas main pipe 12 for supplying gas to the gas main pipe 12. The gas main pipe 12 is connected to the gas delivery pipe 7. The third support 11 is used to support the gas main pipe 12.

[0066] In some embodiments, the third support 11 includes a vertical column and a horizontal column, the vertical column extending in a vertical direction, the horizontal column being perpendicular to the vertical column, and the gas main pipe 12 abutting against the horizontal column.

[0067] The device also includes a fourth support 14, which is arranged adjacent to the second support 9. The fourth support 14 is used to support the third sensor 13. The fourth support 14 includes a pole 141 and a fixing plate 142. The pole 141 extends along the setting direction, and the fixing plate 142 is arranged at the upper end of the pole 141. The third sensor 13 is connected to the fixing plate 142.

[0068] In this example, the sensing element is equipped with sensing points, and the third sensor 13 is used to sense these sensing points. Since the conveying bag 10 is relatively soft, its height will change. The third sensor 13 has a set sensing distance (i.e., a set range). When the sensing element is within the sensing distance range, the third sensor 13 can detect it; when the sensing element exceeds the sensing distance, the third sensor 13 cannot detect it. Sensing the conveying bag 10 is achieved by sensing the sensing element, and by setting sensing points, the conveying bag 10 can be sensed more accurately.

[0069] In some embodiments, a ring-shaped connecting ring 25 is provided at one end of the conveying bag 10 to shape one end of the conveying bag 10, and the sensing element is connected to the connecting ring 25.

[0070] See Figure 9-10 The sensing element includes a connector 16 and a sensing plate 15. The connector 16 connects the sensing plate 15 to the conveying bag 10. The connector 16 includes a first connecting piece 161, a second connecting piece 162, and a third connecting piece 163. One end of the first connecting piece 161 is connected to the conveying bag 10, and the other end of the first connecting piece 161 is connected to one end of the second connecting piece 162 and perpendicular to it. The third connecting piece 163 is connected to the other end of the second connecting piece 162 and perpendicular to it. The sensing plate 15 is connected to the third connecting piece 163. The sensing plate 15 is sheet-shaped and has sensing points.

[0071] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A material unloading auxiliary device, characterized in that, It includes an oil pipe, a first sensor, a first support, a gas delivery pipe, a second sensor, a second support, a material delivery bag, a third sensor, a key box, and a controller. The oil pipe, gas delivery pipe, and material delivery bag are all used to assist in unloading the tank truck. The oil pipe is used to connect to the hydraulic drive components on the tank truck. The first sensor is located at the oil pipe and is used to detect whether the oil pipe is located on the first support. The gas delivery pipe is connected to the tank body of the tank truck for delivering gas to the tank body. The second sensor is installed at the gas delivery pipe and is used to detect whether the gas delivery pipe is located on the second support. The conveying bag is used to communicate with the tank body of the tank truck. The conveying bag is equipped with a sensor. The third sensor is located at the conveying bag and is used to detect whether the sensor is within a set range. The key box is used to hold the car key of the tanker truck. The key box includes a box body, a box cover, and an electromagnetic lock. The electromagnetic lock is used to lock the box body and the box cover together. The controller includes a logic gate circuit. The first sensor, the second sensor, and the third sensor are all connected to the input terminal of the logic gate circuit, and the output terminal of the logic gate circuit is electrically connected to the electromagnetic lock.

2. The unloading auxiliary device according to claim 1, characterized in that, The logic gate circuit is a three-input NAND gate. The first sensor is connected to the first input terminal of the three-input NAND gate, the second sensor is connected to the second input terminal of the three-input NAND gate, and the third sensor is connected to the third input terminal of the three-input NAND gate.

3. The unloading auxiliary device according to claim 1, characterized in that, The electromagnetic lock is located on the lower side of the box body, and a suction plate is provided on the box cover. When the electromagnetic lock is powered on, the suction plate is attracted to the electromagnetic lock; when the electromagnetic lock is de-powered, the suction plate is separated from the electromagnetic lock.

4. The unloading auxiliary device according to claim 1, characterized in that, The box body has a viewing window.

5. The unloading auxiliary device according to claim 1, characterized in that, The oil pipe is provided with an oil pipe joint at one end, and the first sensor is used to detect the oil pipe joint; and / or, the first bracket is provided with a through hole for one end of the oil pipe to pass through.

6. The unloading auxiliary device according to claim 5, characterized in that, The device also includes an oil storage container located on one side of the first support, which is used to receive hydraulic oil flowing out from one end of the oil pipe.

7. The unloading auxiliary device according to claim 1, characterized in that, One end of the gas delivery pipe is provided with a gas pipe connector, and the second sensor is used to detect the gas pipe connector.

8. The unloading auxiliary device according to claim 7, characterized in that, The second support includes an upright beam and a crossbeam. The upright beam is vertically arranged, and the crossbeam is perpendicular to the upright beam. The crossbeam has a slot for engaging the gas delivery pipe, and the opening of the slot is recessed from one end of the crossbeam toward the other end. The second sensor is arranged on the crossbeam and located at the other end of the crossbeam. When the gas delivery pipe is engaged in the slot of the gas delivery pipe, the gas pipe connector is located on the crossbeam.

9. The unloading auxiliary device according to claim 1, characterized in that, The sensing element includes a connector and a sensing plate. The connector is used to connect the sensing plate to the conveying bag. The connector includes a first connecting plate, a second connecting plate, and a third connecting plate. One end of the first connecting plate is connected to the conveying bag, and the other end of the first connecting plate is connected to one end of the second connecting plate and perpendicular to it. The third connecting plate is connected to the other end of the second connecting plate and perpendicular to it. The sensing plate is connected to the third connecting plate.

10. The unloading auxiliary device according to claim 1, characterized in that, The first, second, and third sensors are all photoelectric sensors; and / or, the device further includes three signal lights, which are connected to the controller, and the three signal lights correspond to the first, second, and third sensors respectively.

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