Automatic unloading and conveying integrated machine

Abstract

The application discloses an automatic grain unloading and conveying integrated machine in the field of grain storage equipment, which comprises a movable door machine, a pneumatic conveying assembly and a grain conveying assembly. The pneumatic conveying assembly comprises a telescopic material pipe, a large-bend separator and a gas-solid separation pipe which are sequentially connected. The internal cavity of the large-bend separator is gradually increased from the inlet end to the outlet end. In the grain suction process, the gas-solid two-phase flow enters the large-bend separator from the telescopic material pipe, and the channel cross section suddenly increases, so that the wind speed suddenly decreases, thereby reducing the collision frequency and collision intensity of the grain and the equipment, and the grain breakage probability is reduced. In addition, the grain conveying assembly and the grain suction assembly are combined together, so that the grain suction and conveying are integrated, thereby reducing the number of equipment and avoiding the control complication problem caused by the docking of multiple equipment. The automatic control system of the sensor and the controller can realize the automatic operation of the grain suction and the grain conveying, so that the labor intensity of workers is reduced, and the operation efficiency and safety are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of grain storage equipment, and in particular to an automatic unloading and conveying integrated machine. BACKGROUND

[0002] In the grain storage industry, the existing grain suction machine is a special equipment for bulk grain unloading using the principle of negative pressure pneumatic conveying. The operator inserts the nozzle at the end of the grain suction hose into the bulk grain to be unloaded, and under the action of the pressure difference inside and outside the pipeline, the grain particles are wrapped and sucked into the pipeline by high-speed airflow to form gas-solid two-phase flow. The material is transported to the designated location along with the airflow through the conveying pipeline, and then the gas-solid separation is realized through the unloading device. The grain is collected due to gravity, and the air is exhausted after dust removal and purification. This technology realizes the mechanization, continuous and closed operation of bulk grain unloading, but still has many deficiencies.

[0003] For example, the patent document with publication number CN119822090A discloses a kind of automatic loading and unloading device for grain, which can transport a small amount of surplus grain by gas suction and mechanical lifting, to a certain extent, solve the problem of incomplete traditional unloading and high energy consumption. However, high-speed impact of grain particles can easily cause increased grain breakage, there is no special separation mechanism, and grain can be easily sucked into the air extraction equipment. The integration of unloading, conveying and dust removal is not high, and the degree of automation is also significantly insufficient.

[0004] For example, the patent document with publication number CN115432459A discloses a mobile grain suction machine, although a bend is provided at the corner of the grain suction pipe, but due to the small size of the bend, the speed of gas-solid two-phase flow during the grain suction process does not decrease, and the grain suction path is relatively long. Therefore, the grain will collide multiple times during the conveying process, and the grain breakage rate is still high. The device still relies heavily on manual operation (operating the unloading device, monitoring the unloading state, etc.) during the grain suction process. Not only does it require additional manpower, but the operating environment is also harsh (dust, noise, high-altitude work), labor intensity is high, and there are certain safety hazards. In addition, the unloading part of the device is relatively simple, and additional conveying equipment is needed to connect with impurity cleaning screens and other equipment. The grain will increase the breakage rate after multiple centrifugal throwing. SUMMARY

[0005] To overcome the above-mentioned deficiencies of existing grain suction equipment, the technical problem to be solved by the present application is to provide an automatic unloading and conveying integrated machine with high degree of automation and low grain breakage.

[0006] The technical solution adopted by the present application to solve its technical problems is:

[0007] The present application comprises a mobile door machine, a pneumatic conveying assembly and a grain feeding assembly, all of which are electrically connected to a controller.

[0008] The mobile door machine comprises two door-shaped supports in front and back connected by a top cross beam and a middle cross beam, and a lifting platform slidingly arranged on the columns of the two door-shaped supports;

[0009] The pneumatic conveying assembly comprises a grain suction mechanism and an air suction mechanism arranged on the lifting platform and connected with each other.

[0010] The grain conveying assembly comprises a belt conveyor arranged on the lifting platform.

[0011] The grain suction mechanism comprises an extensible material pipe, a large-bend separator and a gas-solid separation pipe, two ends of the large-bend separator are respectively provided with an inlet and an outlet with downward opening, the inlet is connected with the extensible material pipe which can be vertically lifted, the outlet is rotatably connected with an inlet above the gas-solid separation pipe with a three-way structure, a downward inclined transition plate is arranged between the inlet and the outlet of the large-bend separator, so that the internal cavity of the large-bend separator gradually increases from the inlet end to the outlet end, the corner part of the top of the large-bend separator opposite to the inlet and the outlet is provided with a circular arc chamfer, the outlet at the side of the gas-solid separation pipe is connected with the air suction mechanism, the outlet at the bottom is located above the inlet end of the belt conveyor, and a rotary discharge valve is arranged at the bottom outlet.

[0012] Further, two ends of the lifting platform are respectively hung on the corresponding door-shaped supports through a set of first winch mechanisms, four corners of the lifting platform are provided with guide blocks slidingly connected with four columns of the door-shaped supports, the first winch mechanism comprises a first winch arranged on the middle cross beam and electrically connected with a controller, a first fixed pulley, a second fixed pulley and a third fixed pulley arranged in sequence from left to right on the top of the door-shaped support, and a first movable pulley and a second movable pulley arranged on both sides of the lifting platform, a first pull rope of the first winch is fixed on the top of the door-shaped support after passing through the first fixed pulley, the first movable pulley, the second fixed pulley, the third fixed pulley and the second movable pulley in sequence.

[0013] Further, the top of the door-shaped support is provided with an identification sensor, the bottom of the column of the door-shaped support is provided with a rudder mechanism, and the middle cross beam is provided with a storage battery, the upper and lower sides of the guide block on the lifting platform are respectively provided with a first upper limit sensor and a first lower limit sensor.

[0014] Further, the grain suction mechanism further comprises a second winch mechanism, the telescopic material pipe comprises a fixed pipe and a telescopic pipe, the upper end of the fixed pipe is fixedly connected with the feed inlet of the large-bend separator, the upper end of the telescopic pipe is sealingly sleeved with the lower end of the fixed pipe, and the lower end of the telescopic pipe is provided with a grain suction head, the second winch mechanism comprises a second winch fixed on the large-bend separator and a fourth fixed pulley arranged on the side wall of the fixed pipe, the second pull rope of the second winch is connected with the lower end of the telescopic pipe after passing through the fourth fixed pulley, and the second winch is provided with a second lower limit sensor, and the lower end of the fixed pipe is provided with a second upper limit sensor.

[0015] Further, the part of the large-bend separator, which is opposite to the telescopic material pipe, is provided with a detachable arc-shaped baffle, the inner wall of the arc-shaped baffle is provided with a buffer pad, and the other inner walls of the large-bend separator and the inner wall of the gas-solid separation pipe are all provided with wear-resistant lining plates.

[0016] Further, the discharge outlet of the large-bend separator is rotationally connected with the inlet of the gas-solid separation pipe through a rotary support, the gas-solid separation pipe is fixed on the lifting platform, an electric push rod is arranged between the large-bend separator and the lifting platform, and the lifting platform is further provided with a left limit sensor and a right limit sensor.

[0017] Further, the air suction mechanism comprises a fan and a dust collector, the air inlet of the dust collector is connected with the inlet of the gas-solid separation pipe, the air outlet is connected with the fan through an air pipe, and the bottom of the dust collector is provided with a dust collection box.

[0018] Further, the air suction mechanism further comprises a screw air compressor, the air pipe is provided with an unloading valve, and the screw air compressor is connected with the unloading valve and the back-blowing air inlet of the dust collector through two compressed air pipes.

[0019] Further, the grain conveying assembly comprises a fixed belt conveyor and a movable belt conveyor, the fixed belt conveyor is fixed above the lifting platform, the feed inlet of the fixed belt conveyor is provided with a feed hopper which is opposite to the position of the rotary discharge valve, the discharge end of the fixed belt conveyor extends to the middle part of the lifting platform, and the movable belt conveyor is slidingly arranged below the lifting platform along the length direction of the top cross beam.

[0020] Further, the movable belt conveyor is a telescopic belt conveyor, the length of the telescopic belt conveyor after being retracted is not more than the length of the lifting platform, the movable belt conveyor is slidingly connected with the guide rail on the top cross beam through the rollers on the belt conveyor frame, the lifting platform is provided with a motor, a gear is arranged on the rotating shaft of the motor, and the side surface of the belt conveyor frame is provided with a rack which is engaged with the gear.

[0021] The beneficial effects of the present application are: by setting the large elbow separator between the telescopic material pipe and the gas-solid separation pipe, in the grain suction process, the gas-solid two-phase flow suddenly increases the passage section after entering the large elbow separator from the telescopic material pipe, the air speed drops sharply, the air carrying capacity of the material decreases, so that the material particles with large kinetic energy cannot turn sharply with the airflow due to inertia, thereby separating from the airflow and settling out under the action of gravity, which can not only reduce the breakage probability of the grain, but also realize effective separation of the grain and the gas, and avoid the grain being sucked into the air suction mechanism; in addition, by moving the door machine to move the equipment, by the lifting platform to adapt to the carriages of different heights, and by the telescopic and rotation of the telescopic material pipe and the large elbow separator, the grain suction head can realize blind area-free, automatic and high-precision positioning and material taking in the carriage, and the sucked grain can be directly conveyed by the belt machine without secondary transfer, which greatly improves the automation degree of the whole equipment grain suction and grain conveying, thereby improving the operation efficiency and reducing the labor intensity of workers. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a three-dimensional structure schematic diagram of the present application;

[0023] Figure 2 is a front view of the present application;

[0024] Figure 3 is a top view of the present application;

[0025] Figure 4 is a bottom view of the present application;

[0026] Figure 5 is a side view of the present application;

[0027] Figure 6 is Figure 2 A-A sectional view in the present application;

[0028] Figure 7 is a structure schematic diagram of the grain suction mechanism of the present application;

[0029] Figure 8 is Figure 2 an enlarged view of part B in the present application;

[0030] Figure 9 is Figure 3 an enlarged view of part C in the present application;

[0031] Figure 10 is Figure 4 an enlarged view of part D in the present application;

[0032] Figure 11 is Figure 5 an enlarged view of part E in the present application;

[0033] Figure 12 is a structure schematic diagram of the grain conveying assembly of the present application;

[0034] Figure 13 is the structural schematic diagram of the retracted state of the application.

[0035] The figure is marked as, 1 - mobile door machine, 2 - grain feeding assembly, 3 - controller, 4 - lifting platform, 5 - grain suction mechanism, 6 - air extraction mechanism, 11 - door type support, 12 - top cross beam, 13 - middle cross beam, 21 - fixed belt conveyor, 22 - mobile belt conveyor, 23 - feeding hopper, 24 - motor, 41 - first hoist mechanism, 42 - guide block, 51 - telescopic material pipe, 52 - large elbow separator, 53 - gas-solid separation pipe, 54 - rotary discharge valve, 55 - second hoist mechanism, 61 - fan, 62 - dust collector, 63 - air pipe, 64 - dust collection box, 65 - screw air compressor, 66 - unloading valve, 111 - stand column, 112 - identification sensor, 113 - steering wheel mechanism, 114 - storage battery, 115 - first upper limit position sensor, 116 - first lower limit position sensor, 121 - guide rail, 221 - belt conveyor frame, 222 - roller, 223 - rack, 241 - gear, 411 - first hoist, 412 - first fixed pulley, 413 - second fixed pulley, 414 - third fixed pulley, 415 - first movable pulley, 416 - second movable pulley, 417 - first pull rope, 511 - fixed pipe, 512 - telescopic pipe, 513 - grain suction head, 521 - feeding port, 522 - discharging port, 523 - transition plate, 524 - arc-shaped baffle, 525 - buffer pad, 531 - rotary support, 532 - electric push rod, 533 - left limit position sensor, 534 - right limit position sensor, 551 - second hoist, 552 - fourth fixed pulley, 553 - second pull rope, 554 - second lower limit position sensor, 555 - second upper limit position sensor. DETAILED DESCRIPTION

[0036] The application is further described below in conjunction with the drawings.

[0037] As Figures 1 to 5As shown, the present invention provides an automatic grain unloading and conveying integrated machine, including a mobile door machine 1, a pneumatic conveying component and a grain feeding component 2, all of which are electrically connected to a controller 3; the mobile door machine 1 includes two front and rear door-type brackets 11 connected by a top crossbeam 12 and a middle crossbeam 13, and a lifting platform 4 slidingly arranged on the columns 111 of the two door-type brackets 11; the pneumatic conveying component includes a grain suction mechanism 5 and an exhaust mechanism 6 arranged on the lifting platform 4 and connected to each other; the grain feeding component 2 includes a belt conveyor arranged on the lifting platform 4; the grain suction mechanism 5 includes a telescopic material pipe 51, a large elbow separator 52 and a gas-solid separation pipe 53, and the two ends of the large elbow separator 52 are respectively provided with The feed port 521 and the discharge port 522 are facing downward, the feed port 521 is connected to the telescopic material pipe 51 that can be lifted vertically, and the discharge port 522 is rotatably connected to the inlet above the gas-solid separation pipe 53 with a three-way structure. A downward-sloping transition plate 523 is provided between the feed port 521 and the discharge port 522 of the large elbow separator 52, so that the internal cavity has a shape with a gradually increasing cross-section from the feed end to the discharge end. A circular chamfer is provided at the corner of the top of the large elbow separator 52 facing the feed port 521 and the discharge port 522. The outlet on the side of the gas-solid separation pipe 53 is connected to the exhaust mechanism 6, and the bottom outlet is located above the feed end of the belt conveyor, and a rotary discharge valve 54 is provided at the bottom outlet.

[0038] The controller 3 and the corresponding control program are both prior art, and the present application only constructs hardware execution logic according to the functional requirements of each component and conventional industrial control principles, without involving substantial modification of software program algorithms, control models or electronic circuit principle levels. The mobile door machine 1 can move, and its length and the width and height of the door-shaped support 11 are designed according to the size of the currently commonly used truck carriage, to ensure that the truck can pass between the two upright columns 111 of the door-shaped support 11. The lifting platform 4 is used to control the height of the pneumatic conveying assembly and the grain feeding assembly 2, which is mainly adjusted according to the height of the carriage, and the lifting platform 4 is lowered as much as possible to reduce the suction power and save energy; in addition, when the equipment is transferred, the pneumatic conveying assembly and the grain feeding assembly 2 above the lifting platform 4 can be lowered into the mobile door machine 1, thereby lowering the center of gravity and ensuring the stability and safety of the equipment during transfer. The gas-solid separation pipe 53 is a tee structure, and from the top inlet to the bottom outlet, it can be set as a slope parallel to the transition plate 523 to facilitate the flow of grain, and the axis of the side outlet can be perpendicular to the slope, so that the airflow direction is perpendicular to the material flow direction, thereby reducing the probability of material being sucked away, and in addition, a grille can also be provided at the side outlet to block the material. The rotary discharge valve 54 can continuously discharge the material separated by the large-bend separator 52, and at the same time, rely on the precise fit between the rotor and the shell to effectively block the air between the negative pressure environment inside the large-bend separator 52 and the external normal pressure environment, and maintain the required negative pressure of the system. In addition, under the control of the controller 3, some position sensors and visual sensors can be provided on the mobile door machine 1 to identify the position and size of the carriage, so that the mobile door machine 1 can automatically pass through the two sides of the carriage and complete the scanning of the grain in the carriage, and then the carriage size information is used to control the lifting of the lifting platform 4 to adapt to carriages of different heights. During suction, the controller 3 controls the extension and retraction of the telescopic material pipe 51 and the rotation of the large-bend separator 52, as well as the movement of the mobile door machine 1, to realize the blind area-free, automatic and high-precision positioning and material taking of the suction head 513 in the carriage according to the data such as the height of the carriage, the position of the carriage bottom and the accumulation of the grain in the carriage. Finally, the suctioned grain is conveyed outward by the belt conveyor without the need for secondary transfer, greatly improving the automation degree of the entire equipment suction and grain conveying, thereby improving the operation efficiency and reducing the labor intensity of workers.

[0039] Compared with the existing grain suction machine, the improvement of the grain suction mechanism 5 of the present application is mainly that a large-bend separator 52 is arranged to connect the telescopic material pipe 51 and the gas-solid separation pipe 53, so that the three pipes form an n-shaped structure, and the internal cavity of the large-bend separator 52 is gradually increased in cross section from the inlet end to the outlet end. In addition, a larger space is left above the inlet port 521 and the outlet port 522, and a circular arc chamfer is arranged at the corner portion. During the grain suction process, when the gas-solid two-phase flow enters the large-bend separator 52 from the telescopic material pipe 51, the cross section of the channel suddenly increases, resulting in a sudden drop in wind speed and a decrease in the air carrying capacity of the material. The material particles with large kinetic energy enter the top space of the large-bend separator 52 upward due to inertia, and do not make a sharp turn along the transition plate 523, so as to separate from the gas flow. Then, when the material particles enter the gas-solid separation pipe 53 under the action of gravity, they can be quickly separated and settled due to the difference between the movement direction of the material particles and the direction of the gas flow. Therefore, the grain suction mechanism of the present application can reduce the speed of the grain after entering the large-bend separator 52, thereby reducing the collision frequency and intensity of the grain and the equipment, and reducing the breakage probability of the grain. At the same time, by utilizing the inertia of the grain and the sharp turning characteristics of the gas flow, effective separation of the grain and the gas can be achieved, and the grain can be prevented from being sucked into the suction mechanism 6.

[0040] For the lifting mode of the lifting platform 4, the preferred scheme of the present application is that, as shown in Figure 1 、 Figure 6 , the two ends of the lifting platform 4 are respectively hung on the corresponding door-shaped support 11 through a set of first winch mechanism 41, and the four corners of the lifting platform 4 are provided with guide blocks 42 which are slidingly connected with the four vertical columns 111 of the door-shaped support 11. The guide blocks 42 are slidingly connected with the vertical columns 111 through the rollers on the inner side. The first winch mechanism 41 includes a first winch 411 which is arranged on the middle cross beam 13 and is electrically connected with the controller 3, a first fixed pulley 412, a second fixed pulley 413 and a third fixed pulley 414 which are arranged in sequence from left to right on the top of the door-shaped support 11, and a first movable pulley 415 and a second movable pulley 416 which are arranged on the two sides of the lifting platform 4. The first pull rope 417 of the first winch 411 is fixed on the top of the door-shaped support 11 after passing through the first fixed pulley 412, the first movable pulley 415, the second fixed pulley 413, the third fixed pulley 414 and the second movable pulley 416 in sequence. As shown in Figure 5 , when the first pull rope 417 is released, the lifting platform 4 descends, and when the first pull rope 417 is wound, the lifting platform 4 rises. In order to ensure smooth lifting, the two sets of first winch mechanism 41 at the two ends need to operate synchronously. The reason for using the winch mechanism and the pulley set to control the lifting platform 4 is that the structure can be simplified by driving the lifting through electric energy, and the controllable lifting stroke is also higher. In addition, in order to ensure safety, the first winch 411 needs to use a winch with a pull rope locking mechanism or an anti-reverse mechanism.

[0041] In order to make the function of the mobile door machine 1 more perfect, such as Figure 2 As shown, an identification sensor 112 is provided on the top of the door-shaped bracket 11, a steering wheel mechanism 113 is provided at the bottom of the column 111 of the door-shaped bracket 11, and a battery 114 is provided on the middle crossbeam 13. Figure 11 As shown, the guide block 42 on the lifting platform 4 is equipped with a first upper limit sensor 115 and a first lower limit sensor 116 on its upper and lower sides, respectively. The identification sensor 112, which can be a laser radar or camera, is primarily used to sense the three-dimensional spatial state of the vehicle compartment and materials in real time, such as the position and three-dimensional dimensions of the vehicle or compartment, material distribution, boundaries, and obstacles. This provides a basis for controlling the movement and path of components such as the steering wheel mechanism 113 and the grain suction mechanism 5. The battery 114 provides power to all components, except for high-power electrical appliances such as the pneumatic conveying assembly and the grain feeding assembly 2, enabling functions such as equipment transfer and posture adjustment. During the lifting process of the lifting platform 4, the controller 3 controls the forward and reverse rotation of the first winch 411 based on the position information fed back by the identification sensor 112, so that the lifting platform 4 reaches the predetermined height. The lifting limit is established by the first upper limit sensor 115 and the first lower limit sensor 116, which are electrically connected to the controller 3, contacting the positioning portion on the column 111 to ensure lifting safety.

[0042] Regarding the telescopic method of the telescopic material pipe 51, the preferred embodiment of the present invention is as follows: Figure 2 、 Figure 6As shown, the grain suction mechanism 5 also includes a second hoisting mechanism 55, the telescopic material pipe 51 includes a fixed tube 511 and a telescopic tube 512, the upper end of the fixed tube 511 is fixedly connected to the feed port 521 of the large elbow separator 52, the upper end of the telescopic tube 512 is sealed and slidably sleeved with the lower end of the fixed tube 511, and the lower end of the telescopic tube 512 is provided with a grain suction head 513, the second hoisting mechanism 55 includes a second hoist 551 fixed on the large elbow separator 52 and electrically connected to the controller 3, and a fourth fixed pulley 552 arranged on the side wall of the fixed tube 511, the second pull rope 553 of the second hoist 551 is connected to the lower end of the telescopic tube 512 after passing around the fourth fixed pulley 552, the second hoist 551 is provided with a second lower limit sensor 554, and the lower end of the fixed tube 511 is provided with a second upper limit sensor 555, and the above two limit sensors are both electrically connected to the controller 3. Both the fixed tube 511 and the telescopic tube 512 are straight metal tubes. When the second pull rope 553 is released, the telescopic tube 512 descends under its own weight. When the second pull rope 553 is retracted, the telescopic tube 512 retracts upward into the fixed tube 511. When the telescopic tube 512 rises to the point where the second upper limit sensor 555 contacts the lower end of the fixed tube 511, it reaches its upper limit position, which causes the second upper limit sensor 555 to stop the second hoist 551. When the telescopic tube 512 descends, the second hoist 551 releases the second pull rope 553, reducing the thickness of the second pull rope 553 wound around the second hoisting mechanism 55. When the second pull rope 553 descends to a certain point, it contacts the second lower limit sensor 554, stopping the second hoist 551 and ensuring the integrity of the lift.

[0043] For the large elbow separator 52, the present invention also provides the following preferred solutions. Figure 2 、 Figure 8 As shown, a detachable arc-shaped baffle 524 is provided at the top of the large elbow separator 52 facing the telescopic material tube 51, and a buffer pad 525 is provided on the inner wall of the arc-shaped baffle 524. The buffer pad 525 can be made of rubber or other materials to prevent the material from being damaged due to inertia colliding with the top of the large elbow separator 52. In addition, in order to extend the service life of the equipment, wear-resistant linings are provided on the other inner walls of the large elbow separator 52 except the arc-shaped baffle 524 and the inner wall of the gas-solid separation tube 53. The wear-resistant lining can be made of ultra-high molecular materials such as polyethylene, which has high wear resistance and anti-static properties and is suitable for grain transportation. In addition, in order to realize the rotation of the large elbow separator 52, the discharge port 522 of the large elbow separator 52 is rotatably connected to the inlet of the gas-solid separation tube 53 through a slewing bearing 531, and the gas-solid separation tube 53 is fixed on the lifting platform 4, as shown in FIG. Figure 9As shown, an electric push rod 532 is provided between the large elbow separator 52 and the lifting platform 4. The lifting platform 4 is also provided with a left limit sensor 533 and a right limit sensor 534. During the rotation process, the stroke of the electric push rod 532 is controlled by the contact between the limit portion on the large elbow separator 52 and the left limit sensor 533 and the right limit sensor 534. In addition to the electric push rod 532, a hydraulic motor, a three-phase asynchronous motor, a servo motor, etc. can also be used for driving.

[0044] like Figure 1 、 Figure 2 As shown, the exhaust mechanism 6 comprises a fan 61 and a dust collector 62. The air inlet of the dust collector 62 is connected to the inlet of the gas-solid separation tube 53, and the air outlet is connected to the fan 61 via an air duct 63. A dust box 64 is provided at the bottom of the dust collector 62. The fan 61 is preferably a Roots blower. The controller 3 can flexibly adjust the wind speed based on the grain surface height detected by the identification sensor 112 to ensure that the wind speed is minimized while the grain can be drawn into the large elbow separator 52. This reduces the grain breakage rate and saves energy. The dust collector 62 uses a filter bag made of synthetic fibers to filter dust from the airflow, ensuring that the discharged air meets the dust emission concentration required by environmental protection requirements and that the air entering the Roots blower meets the dust concentration requirements to protect the Roots blower. The dust box 64 can be equipped with a vibrator. After a grain suction operation is completed, the vibrator can be activated to allow dust from the dust collector 62 to fall into the dust box 64. The dust box 64 can then be opened to discharge the dust.

[0045] In addition, the exhaust mechanism 6 also includes a screw air compressor 65. The air duct 63 is provided with an unloading valve 66. The screw air compressor 65 is connected to the unloading valve 66 and the back-blowing air inlet of the dust collector 62 through two compressed air pipes. During the operation of the equipment, the pressure in the system may be higher than the set pressure due to reasons such as material blockage. At this time, the compressed air provided by the screw air compressor 65 can be used to open the unloading valve 66 to avoid damage to the equipment due to excessive internal pressure. In addition, the compressed air provided by the screw air compressor 65 can also be used to regularly back-blow the dust collector 62 to shake off the dust adhering to the bags, reduce the system pressure, thereby reducing overall energy consumption and achieving energy-saving goals.

[0046] For the food delivery component 2, the preferred embodiment of the present invention is as follows: Figure 12As shown, the feeding assembly 2 comprises a fixed belt conveyor 21 and a movable belt conveyor 22. The fixed belt conveyor 21 is fixed above the lifting platform 4, with a feeding hopper 23 arranged at the position opposite to the rotating discharge valve 54 at the feeding end, and the discharging end extending to the middle part of the lifting platform 4. The movable belt conveyor 22 is slidingly arranged below the lifting platform 4 along the length direction of the top cross beam 12. The fixed belt conveyor 21 is mainly used for receiving materials and transferring the materials to the movable belt conveyor 22. The movable belt conveyor 22 is used for stretching and retracting in the direction away from the suction feeding mechanism 5, so as to be connected with the subsequent cleaning equipment and the like. A sensor electrically connected with the controller 3 can be arranged at the end of the movable belt conveyor 22 to control the position of the movable belt conveyor 22, so that the discharging end of the movable belt conveyor 22 can always keep the same position with the subsequent cleaning screen and the like when the movable belt conveyor 22 moves forward and backward, thereby ensuring the continuity of the operation. Further, the movable belt conveyor 22 can be preferably a telescopic belt conveyor, so as to improve the range of the outward material conveying. The length of the movable belt conveyor 22 after retraction is preferably not more than the length of the lifting platform 4, so that the movable belt conveyor 22 can be completely received into the mobile door machine 1, thereby improving the integrity of the equipment. The effect after retraction is shown in Figure 13 As shown, the overall structure is compact, with low gravity center, so as to ensure the stability during the equipment transfer. As shown, Figure 10 、 Figure 12 As shown, the movable belt conveyor 22 can be slidingly connected with the guide rail 121 on the top cross beam 12 through the rollers 222 on the belt conveyor frame 221. A motor 24 is arranged on the lifting platform 4, with a gear 241 arranged on the rotating shaft of the motor 24. The side surface of the belt conveyor frame 221 is provided with a rack 223 engaged with the gear 241. The movement of the movable belt conveyor 22 is realized by the cooperation of the gear 241 and the rack 223, which is simple in structure and accurate in stroke control. The telescopic movement of the movable belt conveyor 22 can also adopt a similar control mechanism.

Claims

1. Automatic grain unloading and conveying machine, characterized by: It includes a mobile door machine (1), a pneumatic conveying component and a grain conveying component (2) all electrically connected to a controller (3); The mobile door machine (1) comprises two front and rear door-shaped brackets (11) connected by a top crossbeam (12) and a middle crossbeam (13), and a lifting platform (4) slidably arranged on the columns (111) of the two door-shaped brackets (11); The pneumatic conveying assembly comprises a grain suction mechanism (5) and an air extraction mechanism (6) which are arranged on a lifting platform (4) and are connected to each other; The food delivery component (2) comprises a belt conveyor arranged on a lifting platform (4); The grain suction mechanism (5) includes a telescopic material pipe (51), a large elbow separator (52) and a gas-solid separation pipe (53). The two ends of the large elbow separator (52) are respectively provided with a feed port (521) and a discharge port (522) with downward openings. The feed port (521) is connected to the telescopic material pipe (51) that can be lifted vertically. The discharge port (522) is rotatably connected to the inlet above the gas-solid separation pipe (53) with a three-way structure. A downwardly inclined transition plate (523) is provided between the feed end and the discharge port (522), so that the internal cavity thereof is in a shape with a cross-section gradually increasing from the feed end to the discharge end. A circular chamfer is provided at the corner portion of the top of the large elbow separator (52) facing the feed port (521) and the discharge port (522). The outlet on the side of the gas-solid separation pipe (53) is connected to the exhaust mechanism (6). The outlet at the bottom is located above the feed end of the belt conveyor, and a rotary discharge valve (54) is provided at the bottom outlet.

2. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: The two ends of the lifting platform (4) are respectively suspended on the corresponding door-shaped bracket (11) through a set of first hoisting mechanisms (41). The four corners of the lifting platform (4) are provided with guide blocks (42) that are slidably connected to the four columns (111) of the door-shaped bracket (11). The first hoisting mechanism (41) includes a first hoist (411) that is arranged on the middle crossbeam (13) and is electrically connected to the controller (3), and a first hoist (411) that is arranged on the top of the door-shaped bracket (11) from left to right. A fixed pulley (412), a second fixed pulley (413) and a third fixed pulley (414), as well as a first movable pulley (415) and a second movable pulley (416) are arranged on both sides of the lifting platform (4); a first pull rope (417) of the first hoist (411) is fixed to the top of the door-shaped bracket (11) after passing through the first fixed pulley (412), the first movable pulley (415), the second fixed pulley (413), the third fixed pulley (414) and the second movable pulley (416) in sequence.

3. The automatic grain unloading and conveying integrated machine according to claim 2, characterized in that: The top of the door-shaped bracket (11) is provided with an identification sensor (112), the bottom of the column (111) of the door-shaped bracket (11) is provided with a steering wheel mechanism (113), the middle crossbeam (13) is provided with a battery (114), and the upper and lower sides of the guide block (42) on the lifting platform (4) are respectively provided with a first upper limit sensor (115) and a first lower limit sensor (116).

4. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: The grain suction mechanism (5) further comprises a second hoisting mechanism (55), the telescopic material pipe (51) comprises a fixed pipe (511) and a telescopic pipe (512), the upper end of the fixed pipe (511) is fixedly connected to the feed port (521) of the large elbow separator (52), the upper end of the telescopic pipe (512) is sealed and slidably sleeved with the lower end of the fixed pipe (511), and the lower end of the telescopic pipe (512) is provided with a grain suction head (513), and the second hoisting mechanism (55) comprises a fixed pipe (511) and a telescopic pipe (512). A second hoist (551) is fixed on the large elbow separator (52) and a fourth fixed pulley (552) is provided on the side wall of the fixed tube (511). A second pull rope (553) of the second hoist (551) passes around the fourth fixed pulley (552) and is connected to the lower end of the telescopic tube (512). The second hoist (551) is provided with a second lower limit sensor (554), and the lower end of the fixed tube (511) is provided with a second upper limit sensor (555).

5. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: A detachable arc-shaped baffle (524) is provided at the top of the large elbow separator (52) facing the telescopic material pipe (51), and a buffer pad (525) is provided on the inner wall of the arc-shaped baffle (524). The other inner walls of the large elbow separator (52) and the inner wall of the gas-solid separation pipe (53) are provided with wear-resistant linings.

6. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: The discharge port (522) of the large elbow separator (52) is rotatably connected to the inlet of the gas-solid separation pipe (53) via a slewing bearing (531). The gas-solid separation pipe (53) is fixed on the lifting platform (4). An electric push rod (532) is provided between the large elbow separator (52) and the lifting platform (4). The lifting platform (4) is also provided with a left limit sensor (533) and a right limit sensor (534).

7. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: The exhaust mechanism (6) comprises a fan (61) and a dust collector (62); the air inlet of the dust collector (62) is connected to the inlet of the gas-solid separation pipe (53); the air outlet is connected to the fan (61) via the air duct (63); and a dust collecting box (64) is provided at the bottom of the dust collector (62).

8. The automatic grain unloading and conveying integrated machine according to claim 7, characterized in that: The exhaust mechanism (6) further includes a screw air compressor (65), an unloading valve (66) is provided on the air duct (63), and the screw air compressor (65) is connected to the unloading valve (66) and the back-blowing air inlet of the dust collector (62) through two compressed air pipes.

9. The automatic grain unloading and conveying integrated machine according to claim 1, characterized in that: The food delivery assembly (2) includes a fixed belt conveyor (21) and a movable belt conveyor (22). The fixed belt conveyor (21) is fixed above the lifting platform (4). A feed hopper (23) is provided at the feed end thereof facing the rotary discharge valve (54). The discharge end extends to the middle of the lifting platform (4). The movable belt conveyor (22) is slidably arranged below the lifting platform (4) along the length direction of the top crossbeam (12).

10. The automatic grain unloading and conveying integrated machine according to claim 9, characterized in that: The mobile belt conveyor (22) is a retractable belt conveyor, and its length after retraction does not exceed the length of the lifting platform (4). The mobile belt conveyor (22) is slidably connected to the guide rail (121) on the top beam (12) through the roller (222) on the belt frame (221). The lifting platform (4) is provided with a motor (24), and a gear (241) is provided on the rotating shaft of the motor (24). A rack (223) meshing with the gear (241) is provided on the side of the belt frame (221).

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