Gantry type bulk cargo automatic sampling device

Abstract

The present invention relates to a gantry-type automatic bulk cargo sampling device, comprising a gantry, the center of the gantry being a truck passage, a main slider and a first driver being arranged on the crossbeam of the gantry, a vertically arranged sliding column and a second driver being connected to the main slider, the sliding column slidingly cooperating with the main slider, the lower end of the sliding column being located below the main slider and fixedly connected to a hanging beam, a plurality of spiral feeders being connected to the bottom surface of the hanging beam, any spiral feeder being connected to the hanging beam through a bracket, a hopper with an opening at the top being fixedly connected to the inner side of a support leg on one side of the gantry, the lower end of the hopper extending to the bottom of the gantry support leg and extending through the support leg to the outside of the support leg to form a discharge port, a controller being fixedly connected to the support leg on the side of the discharge port, the first driver, the second driver and each spiral feeder being electrically connected to the controller and controlled by the controller.

Description

Technical Field

[0001] The invention belongs to the technical field of sampling equipment, and in particular relates to a gantry type automatic bulk cargo sampling device. Background Art

[0002] At present, there are two main ways of loading and unloading bulk cargo at bulk cargo terminals: on-site and through-transit. According to the standards and specifications of the port supervision unit (CCIC), relevant cargo types need to be sampled and inspected, and sampling personnel need to take samples on-site, at through-transit points, etc. The sampling operation area is mixed with people and machines, the sampling efficiency is low, the sampling personnel have high labor intensity, and the safety factor is low. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: the present invention provides a gantry type bulk cargo automatic sampling device to solve the technical problems of low efficiency, low safety factor and high labor intensity of traditional manual sampling.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a gantry type bulk cargo automatic sampling device, comprising a gantry, the center of the gantry is a truck channel, a main slider that can slide back and forth along the axial direction of the gantry and a first driver that drives the main slider to slide are provided on the crossbeam of the gantry, the main slider is connected to a vertically arranged sliding column and a second driver that drives the sliding column to slide back and forth along its axial direction, the sliding column and the main slider are slidably matched, the lower end of the sliding column is located below the main slider and is fixedly connected to a horizontally arranged hanging beam, the length direction of the hanging beam Perpendicular to the axial direction of the crossbeam, a plurality of spiral feeders are connected to the bottom surface of the suspension beam, and the plurality of spiral feeders are arranged in sequence along the length direction of the suspension beam. Any spiral feeder is connected to the suspension beam through a bracket. A hopper with an open top is fixedly connected to the inner side of the support leg on one side of the gantry. The lower end of the hopper extends to the bottom of the gantry support leg and extends through the support leg to the outside of the support leg to form a discharge port. A controller is fixedly connected to the support leg on the side of the discharge port. The first driver, the second driver and each spiral feeder are electrically connected to the controller and are controlled by the controller.

[0005] As a preferred solution, two guide rails extending along the axial direction are arranged in parallel on an outer side surface of the crossbeam, the two guide rails are arranged up and down, and a main rack is arranged in parallel between the two guide rails. The main slider is slidably connected to the two guide rails, and the first driver includes a main drive motor fixedly connected to the main slider, and the drive shaft of the main drive motor passes through the main slider and extends to one side of the main rack. A main gear engaged with the main rack is fixedly sleeved on the drive shaft of the main drive motor, and the controller is electrically connected to the main drive motor to control the action of the main drive motor.

[0006] As a preferred solution, a vertically extending through hole is provided on the main slider, and at least one auxiliary rail is provided on the multiple outer walls of the sliding column, and a plurality of support blocks corresponding to the auxiliary rails are provided on the inner wall of the through hole, and each support block is provided with a sliding groove matching the corresponding auxiliary rail. The sliding column is slidably connected to the multiple support blocks, and a secondary rack extending along its axial direction is provided on one side of the auxiliary rail. The second driver includes an auxiliary drive motor fixedly connected to the main slider, and the output shaft of the auxiliary drive motor passes through the side wall of the through hole and is inserted into the through hole and fixedly sleeved with a secondary gear engaged with the secondary rack. The controller is electrically connected to the auxiliary drive motor to control the action of the auxiliary drive motor.

[0007] As a preferred solution, the spiral feeder includes a fixed end plate, a feeding motor fixedly connected to one side of the end plate, a feeding pipe fixedly connected to the other side of the end plate, and a feeding spiral rod coaxially arranged in the feeding pipe and transmission connected to the feeding motor. The lower end of the bracket is fixedly connected to the end plate, and the upper end of the bracket is rotatably connected to an axle seat through a pin shaft parallel to the cross beam, and the axle seat is fixedly connected to the bottom surface of the suspension beam.

[0008] As a preferred solution, the lower end of the rod body of the feeding spiral rod extends out of the lower end of the feeding tube and is connected to multiple material-diverting pieces evenly distributed along the circumference of the rod body, and each material-diverting piece extends radially outward along the feeding tube to the outside of the feeding tube.

[0009] As a preferred solution, the pin shaft is fixedly connected to the bracket, and an angle sensor is fixedly connected to the top shaft seat of each spiral feeder. Each angle sensor is transmission-connected to the pin shaft on the shaft seat where it is located to detect the rotation angle of the pin shaft. Each angle sensor is electrically connected to the controller to send the detection results to the controller.

[0010] As a preferred solution, the upper opening of the receiving hopper is rectangular, the length direction of which is parallel to the arrangement direction of the spiral feeders, and the size of the upper opening of the receiving hopper is sufficient to allow all spiral feeders to be inserted simultaneously.

[0011] As a preferred solution, two scanning imagers are provided on the top of the gantry. The two scanning imagers are respectively arranged on both sides of the central axis of the gantry. The two scanning imagers are electrically connected to the controller respectively and send scanning data to the controller.

[0012] As a preferred solution, two laser sensors are provided on one side leg of the gantry, and a reflective plate corresponding to the two laser sensors is provided on the other side leg. The two laser sensors are respectively arranged at the entrance and exit of the gantry truck channel. The two laser sensors are electrically connected to the controller respectively and send detection signals to the controller.

[0013] As a preferred solution, a horizontally arranged telescopic frame is connected to one side leg of the gantry, and the telescopic frame is located at the exit of the gantry truck channel. A traffic light is fixedly connected to the free end of the telescopic frame, and the traffic light is electrically connected to the controller and is controlled by the controller.

[0014] The beneficial effects of the present invention are as follows: the present invention utilizes a sliding column that can move up and down to drive multiple spiral feeders to take materials in the truck compartment under the gantry, and drives the sliding column and multiple spiral feeders to slide back and forth along the axial direction of the beam through a main slider that is slidably connected to the gantry crossbeam, adjusts the material taking position, realizes multi-point material taking, and realizes sample self-unloading, thereby realizing the automatic sampling function of bulk cargo, greatly reducing the labor intensity of workers, improving the operating safety of workers, and improving the adoption efficiency.

[0015] The present invention further drives the main slider to slide back and forth along the guide rail on the crossbeam through the transmission relationship between the main gear and the main rack, thereby improving the controller's control accuracy over the moving distance of the main slider, and drives the sliding column to slide back and forth vertically through the transmission relationship between the secondary gear and the secondary rack, thereby improving the controller's control accuracy over the sliding column and the lifting height of each spiral feeder.

[0016] The present invention further adopts a rotating connection structure to connect the bracket and the hanging beam, so that the spiral feeder has a swing amplitude of a certain angle, thereby avoiding the situation where the spiral feeder is not pulled out of the carriage in time and the truck starts to cause collision and damage.

[0017] The present invention further adopts an angle sensor to detect the rotation angle of the pin shaft to ensure that when the pin shaft deflects, the controller can promptly control the sliding column to drive each spiral feeder to rise and quickly withdraw from the carriage to avoid damage to the spiral feeder.

[0018] The present invention further connects a plurality of material-prying pieces to the lower end of the rod body of the material-retrieving screw rod to enhance the crushing effect of the material-retrieving screw rod on the material and improve the smoothness of the material entering the material-retrieving pipe.

[0019] The present invention further provides two scanning imagers at both ends of the beam to image the surface of the material in the carriage, thereby providing a data basis for the controller, so that the controller can calculate reasonable sampling points and control each spiral feeder to move to the appropriate sampling point for sampling, ensuring that sufficient samples can be obtained.

[0020] The present invention further provides laser sensors and reflective plates at the entrance and exit of the truck channel to detect the position of the truck, thereby realizing multiple functions such as automatic sampling of vehicles entering the channel, automatic alarm when the vehicle moves during the sampling process, and detection of whether the vehicle has left the channel after the sampling is completed.

[0021] The present invention further arranges traffic lights on the support legs of the truck exit vehicle to prompt the driver to stop or drive. At the same time, the present invention adopts a telescopic frame to support the traffic lights, so that the traffic lights can be retracted in the non-working state, thereby reducing the space occupied by the gantry-type bulk cargo automatic sampling device in the non-working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 It is a schematic diagram of the forward three-dimensional structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the lateral three-dimensional structure of the present invention;

[0025] Figure 3 yes Figure 2 A magnified view of part A in FIG;

[0026] Figure 4 This is an exploded view of the connection structure of the second driver, the sliding column and the main slider;

[0027] Figure 5 This is a schematic diagram of the specific assembly structure of the spiral reclaimer;

[0028] Figures 1 to 5 Middle: 1. Gantry, 101. Crossbeam, 102. Support Legs, 2. Truck Passage, 3. Main Slider, 4. First Drive, 401. Main Drive Motor, 402. Main Gear, 5. Sliding Column, 6. Second Drive Motor, 601. Auxiliary Drive Motor, 602. Auxiliary Gear, 7. Lifting Beam, 8. Screw Reclaimer, 801. End Plate, 802. Reclaim Motor, 803. Reclaiming Pipe, 804. Screw Reclaiming Rod , 805, material stripping piece, 9, bracket, 10, receiving hopper, 11, discharge port, 12, controller, 13, guide rail, 14, main rack, 15, through hole, 16, auxiliary rail, 17, support block, 18, slide, 19, auxiliary rack, 20, pin shaft, 21, shaft seat, 22, angle sensor, 23, scanning imager, 24, laser sensor, 25, reflector, 26, telescopic frame, 27, traffic light. DETAILED DESCRIPTION

[0029] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 5The gantry type bulk cargo automatic sampling device shown in the figure includes a gantry 1, the center of the gantry 1 is a truck channel 2, and a main slider 3 that can slide back and forth along the axial direction of the crossbeam 101 and a first driver 4 that drives the main slider 3 to slide are provided on the crossbeam 101 of the gantry 1. The main slider 3 is connected to a vertically arranged sliding column 5 and a second driver 6 that drives the sliding column 5 to slide back and forth along its axial direction. The sliding column 5 is slidably matched with the main slider 3. The lower end of the sliding column 5 is located below the main slider 3 and is fixedly connected to a horizontally arranged hanging beam 7. The length direction of the hanging beam 7 is perpendicular to the axial direction of the crossbeam 101, and the bottom surface of the hanging beam 7 is connected to There are multiple spiral feeders 8, which are arranged in sequence along the length direction of the suspension beam 7. Any spiral feeder 8 is connected to the suspension beam 7 through a bracket 9. A hopper 10 with an open top is fixedly connected to the inner side of the support leg 102 on one side of the gantry 1. The lower end of the hopper 10 extends to the bottom of the support leg 102 of the gantry 1 and extends to the outside of the support leg 102 to form a discharge port 11. A controller 12 is fixedly connected to the support leg 102 on one side of the discharge port 11. The first driver 4, the second driver 6 and each spiral feeder 8 are electrically connected to the controller 12 and are controlled by the controller 12.

[0031] like Figure 3 As shown, in this embodiment, two guide rails 13 extending along the axial direction are arranged in parallel on an outer side surface of the beam 101, and the two guide rails 13 are arranged up and down. A main rack 14 is arranged in parallel between the two guide rails 13, and the main slider 3 is slidably connected to the two guide rails 13. The first driver 4 includes a main drive motor 401 fixedly connected to the main slider 3, and the drive shaft of the main drive motor 401 passes through the main slider 3 and extends to one side of the main rack 14. A main gear 402 engaged with the main rack 14 is fixedly sleeved on the drive shaft of the main drive motor 401, and the controller 12 is electrically connected to the main drive motor 401 to control the action of the main drive motor 401.

[0032] like Figure 4 As shown in this embodiment, a vertically extending through hole 15 is provided on the main slider 3, and at least one auxiliary rail 16 is provided on each of the multiple outer walls of the sliding column 5. A plurality of support blocks 17 corresponding to the auxiliary rails 16 are provided on the inner wall of the through hole 15, and each support block 17 is provided with a slide groove 18 that cooperates with the corresponding auxiliary rail 16. The sliding column 5 is slidably connected to the multiple support blocks 17, and a secondary rack 19 extending along its axial direction is provided on one side of the auxiliary rail 16. The second driver 6 includes an auxiliary drive motor 601 fixedly connected to the main slider 3, and the output shaft of the auxiliary drive motor 601 passes through the side wall of the through hole 15 and is inserted into the through hole 15 and is fixedly sleeved with a secondary gear 602 that meshes with the secondary rack 19. The controller 12 is electrically connected to the auxiliary drive motor 601 to control the action of the auxiliary drive motor 601.

[0033] like Figure 5 As shown, the spiral feeder 8 described in this embodiment includes a fixed end plate 801, a feeding motor 802 fixedly connected to one side of the end plate 801, a feeding pipe 803 fixedly connected to the other side of the end plate 801, and a feeding spiral rod 804 coaxially arranged in the feeding pipe 803 and transmission connected to the feeding motor 802. The lower end of the bracket 9 is fixedly connected to the end plate 801, and the upper end of the bracket 9 is rotatably connected to an axle seat 21 through a pin shaft 20 parallel to the cross beam 101, and the axle seat 21 is fixedly connected to the bottom surface of the suspension beam 7.

[0034] The lower end of the rod body of the material taking spiral rod 804 extends out of the lower end of the material taking pipe 803 and is connected to a plurality of material-moving pieces 805 evenly distributed along the circumference of the rod body. Each material-moving piece 805 extends radially outward from the material taking pipe 503 to the outside of the material taking pipe 803. The edges and corners of the material-moving pieces 805 are sharp to improve the effect of crushing the material.

[0035] like Figure 5 As shown, the pin shaft 20 is fixedly connected to the bracket 9, and an angle sensor 22 is fixedly connected to the top shaft seat 21 of each spiral feeder 8. Each angle sensor 22 is transmission-connected to the pin shaft 20 on the shaft seat 21 where it is located to detect the rotation angle of the pin shaft 20. Each angle sensor 22 is electrically connected to the controller 12 to send the detection result to the controller 12.

[0036] The upper opening of the receiving hopper 10 in this embodiment is in the shape of a rectangle, and its length direction is parallel to the arrangement direction of the spiral reclaimers 8. The size of the upper opening of the receiving hopper 10 is sufficient to allow all the spiral reclaimers 8 to be inserted simultaneously.

[0037] like Figure 1 and Figure 2 As shown, two scanning imagers 23 are provided on the top of the gantry 1. The two scanning imagers 23 are respectively arranged on both sides of the central axis of the gantry 1. The two scanning imagers 23 are electrically connected to the controller 12 and send scanning data to the controller 12. The controller 12 can form a three-dimensional image of the material surface in the truck compartment below the gantry and the height of each point on the material surface based on the scanning data, and then select a suitable sampling point to control the spiral feeder 8 to drill into the sampling point for sampling.

[0038] In this embodiment, two laser sensors 24 are installed on one leg 102 of the gantry 1, and a reflector 25 corresponding to each of the two laser sensors 24 is installed on the other leg 102. The two laser sensors 24 are respectively located at the entrance and exit of the truck passage 2 of the gantry 1. The two laser sensors 24 are electrically connected to the controller 12 and send detection signals to the controller 12. The laser sensor 24 located at the exit detects the front of the vehicle, while the laser sensor 24 located at the entrance detects the rear of the vehicle. The controller determines the vehicle's entry, exit, or stationary status based on the sequence of signal changes sent by the two laser sensors 24. Based on these statuses, the controller controls the coordinated operation of the first and second actuators 4 and 6 to sample the bulk materials within the vehicle compartment.

[0039] To alert the driver, this embodiment features a horizontally mounted telescopic frame 26 attached to one side leg 102 of the gantry 1. This telescopic frame 26 is located at the exit of the truck passage 2 of the gantry 1. A traffic light 27 is fixedly connected to the free end of the telescopic frame 26. Traffic light 27 is electrically connected to and controlled by the controller 12. The controller 12 controls traffic light 27 based on the sampling progress. When sampling is complete and the auger 8 rises and leaves the vehicle, the controller 12 illuminates traffic light 27 green, prompting the driver to depart. The telescopic frame 26 in this embodiment can be a conventional axially retractable device, such as a folding telescopic frame or a telescopic frame.

[0040] Of course, in addition to using the traffic lights 27 to remind the driver, a voice player can also be used to remind the driver, which are all equivalent alternatives to the technical solution of the present invention.

[0041] The working process of the present invention is as follows: Figure 1 and Figure 2 As shown, when a dump truck loaded with bulk cargo drives into the gantry along the truck channel, the laser sensor 24 located at the entrance first detects the front of the vehicle and sends a detection signal to the controller 12. At this time, the controller 12 controls the traffic light 27 to display a yellow light, prompting the driver to proceed slowly. When the laser sensor 24 located at the exit detects the front of the vehicle and sends a detection signal to the controller 12, the controller 12 immediately controls the traffic light 27 to display a red light, prompting the driver to stop.

[0042] Then the controller 12 starts the two scanning imagers 23 to scan the material in the car and sends the scanning results to the controller. The controller selects a suitable sampling point according to the scanning results, and then controls the first driver 4 and the second driver 6 to coordinate the actions, moves each spiral feeder 8 to above the sampling point and gradually inserts each spiral feeder 8 into the material. Then the controller 12 controls the feeding motor 802 of each spiral feeder 8 to operate, and the feeding motor 802 drives the feeding screw rod 804 to rotate. The material-picking piece 805 at the lower end of the spiral feeder 8 can break up the block material during the rotation process, so that the material can be lifted by the feeding screw rod 804 and stored in the feeding pipe 803.

[0043] The controller 12 determines the material collection amount based on the rotation angle of the material collection motor 802. When the material collection amount meets the requirement, the controller 12 controls the material collection motor 802 to stop, and then controls the first driver 4 and the second driver 6 to coordinate actions to lift and move each spiral material collector 8 to the top of the receiving hopper 10, and then controls the second driver 6 to lower each spiral material collector 8 so that the lower end of each spiral material collector 8 is inserted into the upper mouth of the receiving hopper 10, and then controls each material collection motor 802 to flip over to empty the sample stored in the material collection tube 803.

[0044] If necessary, the controller 12 can control each spiral feeder 8 to sample the material in the same compartment multiple times until the sample volume meets the requirements. The controller 12 can also control any number of spiral feeders 8 to sample as needed, and the sampling points can be different each time.

[0045] After the sampling is completed, the controller 12 controls each spiral material reclaimer 8 to rise and reset, and then controls the green light of the traffic light 27 to light up to remind the driver to drive away.

[0046] During the sampling process, if the driver makes a mistake and causes the vehicle to move, the screw feeders 8 inserted into the material will deflect. At this time, the pin 20 will rotate, and the angle sensor 22 detecting the rotation of the pin will send a signal to the controller 12. After receiving the signal, the controller 12 will immediately stop the sampling action, control the sampling motors 802 to stop, and immediately control the second driver 6 to drive the sliding column 5 to rise rapidly to quickly lift each screw feeder 8 to prevent the vehicle from causing damage to each screw feeder 8. At the same time, the controller 12 can control the red light or the red, yellow, and green lights of the traffic light to flash, reminding the driver to actually stop. If the controller 12 is connected to an audible and visual alarm, it can also be used to sound an alarm, prompting the driver to operate according to regulations.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. Gantry type bulk cargo automatic sampling device, characterized in that: The invention comprises a gantry (1), the center of the gantry (1) is a truck channel (2), a main slider (3) which can slide back and forth along the axial direction of the gantry (101) and a first driver (4) which drives the main slider (3) to slide are provided on the crossbeam (101), the main slider (3) is connected with a vertically arranged sliding column (5) and a second driver (6) which drives the sliding column (5) to slide back and forth along its axial direction, the sliding column (5) and the main slider (3) are slidably matched, the lower end of the sliding column (5) is located below the main slider (3) and is fixedly connected with a horizontally arranged hanging beam (7), the length direction of the hanging beam (7) is perpendicular to the axial direction of the crossbeam (101), and a plurality of spiral feeders (8) are connected to the bottom surface of the hanging beam (7). ), a plurality of spiral feeders (8) are arranged in sequence along the length direction of the hanging beam (7), any spiral feeder (8) is connected to the hanging beam (7) through a bracket (9), a receiving hopper (10) with a top opening is fixedly connected to the inner side of the support leg (102) on one side of the gantry (1), the lower end of the receiving hopper (10) extends to the bottom of the support leg (102) of the gantry (1) and passes through the support leg (102) to the outside of the support leg (102), forming a discharge port (11), a controller (12) is fixedly connected to the support leg (102) on one side of the discharge port (11), the first driver (4), the second driver (6) and each spiral feeder (8) are electrically connected to the controller (12) and are controlled by the controller (12); Two guide rails (13) extending along the axial direction thereof are arranged in parallel on an outer side surface of the crossbeam (101), the two guide rails (13) are arranged up and down, and a main rack (14) is arranged in parallel between the two guide rails (13), the main slider (3) is slidably connected to the two guide rails (13), the first driver (4) includes a main drive motor (401) fixedly connected to the main slider (3), the drive shaft of the main drive motor (401) passes through the main slider (3) and extends to one side of the main rack (14), and a main gear (402) meshing with the main rack (14) is fixedly sleeved on the drive shaft of the main drive motor (401), and the controller (12) is electrically connected to the main drive motor (401) to control the action of the main drive motor (401); The main slider (3) is provided with a through hole (15) extending vertically, and at least one auxiliary rail (16) is provided on the outer wall of the sliding column (5). A plurality of support blocks (17) corresponding to the auxiliary rails (16) are provided on the inner wall of the through hole (15), and each support block (17) is provided with a slide groove (18) matched with the corresponding auxiliary rail (16). The sliding column (5) is slidably connected to the plurality of support blocks (17), and a secondary rack (19) extending along its axial direction is provided on one side of the auxiliary rail (16). The second driver (6) includes an auxiliary drive motor (601) fixedly connected to the main slider (3), and the output shaft of the auxiliary drive motor (601) passes through the side wall of the through hole (15) and is inserted into the through hole (15) and is fixedly sleeved with a secondary gear (602) meshing with the secondary rack (19). The controller (12) is electrically connected to the auxiliary drive motor (601) to control the action of the auxiliary drive motor (601).

2. The gantry type bulk cargo automatic sampling device according to claim 1, characterized in that: The spiral feeder (8) includes a fixed end plate (801), a feed motor (802) fixedly connected to one side of the end plate (801), a feed pipe (803) fixedly connected to the other side of the end plate (801), and a feed screw rod (804) coaxially arranged in the feed pipe (803) and transmission-connected to the feed motor (802). The lower end of the bracket (9) is fixedly connected to the end plate (801), and the upper end of the bracket (9) is rotationally connected to an axle seat (21) via a pin (20) parallel to the crossbeam (101). The axle seat (21) is fixedly connected to the bottom surface of the suspension beam (7).

3. The gantry type bulk cargo automatic sampling device according to claim 2, characterized in that: The lower end of the rod body of the feeding spiral rod (804) extends out of the lower end of the feeding tube (803) and is connected to a plurality of material shifting pieces (805) evenly distributed along the circumference of the rod body. Each material shifting piece (805) extends radially outwards from the feeding tube (803) to the outside of the feeding tube (803).

4. The gantry type bulk cargo automatic sampling device according to claim 2, characterized in that: The pin shaft (20) is fixedly connected to the bracket (9), and an angle sensor (22) is fixedly connected to the shaft seat (21) at the top end of each spiral feeder (8). Each angle sensor (22) is transmission-connected to the pin shaft (20) on the shaft seat (21) where it is located to detect the rotation angle of the pin shaft (20). Each angle sensor (22) is electrically connected to the controller (12) to send the detection result to the controller (12).

5. The gantry type bulk cargo automatic sampling device according to claim 1, characterized in that: The upper end opening of the receiving hopper (10) is in the shape of a rectangle, and its length direction is parallel to the arrangement direction of the spiral feeders (8). The upper end opening of the receiving hopper (10) is large enough to allow all the spiral feeders (8) to be inserted simultaneously.

6. The gantry type bulk cargo automatic sampling device according to claim 1, characterized in that: Two scanning imagers (23) are provided on the top of the gantry (1). The two scanning imagers (23) are respectively arranged on both sides of the central axis of the gantry (1). The two scanning imagers (23) are electrically connected to the controller (12) and send scanning data to the controller (12).

7. The gantry type bulk cargo automatic sampling device according to claim 1, characterized in that: Two laser sensors (24) are provided on one side leg (102) of the gantry (1), and a reflector (25) corresponding to the two laser sensors (24) is provided on the other side leg (102). The two laser sensors (24) are respectively provided at the entrance and exit of the truck passage (2) of the gantry (1). The two laser sensors (24) are respectively electrically connected to the controller (12) and send detection signals to the controller (12).

8. The gantry type bulk cargo automatic sampling device according to claim 1, characterized in that: A horizontally arranged telescopic frame (26) is connected to one side leg (102) of the gantry (1). The telescopic frame (26) is located at the exit of the truck passage (2) of the gantry (1). A traffic light (27) is fixedly connected to the free end of the telescopic frame (26). The traffic light (27) is electrically connected to the controller (12) and is controlled by the controller (12).

Images