Automatic loading system for bulk materials

Abstract

The present invention discloses an automatic bulk material loading system, wherein a plurality of discharge ports with discharge valves arranged in a straight line are arranged at the bottom of the storage bin; a track is installed on a track bracket at the bottom of the storage bin; and a frame of a mobile bulk loader is driven by a travel motor and installed on the track. A receiving hopper is fixed on the frame, and the length of the receiving hopper along the track direction is greater than the distance between any two adjacent discharge ports; a telescopic chute is sealed and fixed at the bottom of the receiving hopper, and a valve switch mechanism and a scraper plate are arranged at the bottom of the telescopic chute. The mobile bulk loader provided in the automatic bulk material loading system of the present invention drags the loading material to the transport vehicle box and self-levels the material tip when moving forward; there is no need for the driver to move the vehicle to receive the material, and there is no need for personnel and the driver to cooperate in loading, and dust is not easily generated.

Description

Technical Field

[0001] The invention belongs to the technical field of aggregate transportation, and in particular relates to an automatic bulk material loading system. Background Art

[0002] In the construction field, machine-made finished aggregates, machine-made sand and other bulk materials are stored in a storage warehouse after they are manufactured. Before they are sold, they are unloaded from the bottom of the storage warehouse and loaded onto transport vehicles. In the prior art, the loading of bulk materials is to set multiple bulk ports at the bottom of the storage warehouse, and an automatically retractable chute is set below the bulk ports. When loading, the transport vehicle moves to the bottom of the chute, and then unloads the materials into the car body through the chute. During the unloading process, the transport vehicle needs to be moved according to the amount of unloading to ensure that the materials are evenly unloaded at different positions of the car body until it is full. In this process, one or more unloaders and drivers need to cooperate with each other to load the materials. If the cooperation is not good, the car body will not be full or will be too full and the materials will spill. In addition, the materials in the car body are in the shape of a hump, and it is necessary to manually get on the car to level the tip of the materials, which is inefficient. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic bulk material loading system, which does not require the cooperation of unloaders and drivers in loading materials, and the loaded materials have no humps.

[0004] The technical solution of the present invention is:

[0005] A bulk material automatic loading system comprises a material storage bin, a track bracket, tracks and a mobile bulk loader; a plurality of discharge ports equipped with discharge valves are arranged at the bottom of the material storage bin, and the plurality of discharge ports are arranged in a straight line; the track bracket is fixed to the bottom of the material storage bin, and the track is installed on the track bracket along the arrangement direction of the plurality of discharge ports; the mobile bulk loader comprises a frame, a travel motor, a receiving hopper and a telescopic chute, the frame is driven by the travel motor, and the track is used for the frame to travel; the receiving hopper is fixed on the frame, and the length of the receiving hopper along the direction of the track is greater than the distance between any two adjacent discharge ports; the bottom of the receiving hopper is sealed and connected to the telescopic chute, and a valve switch mechanism and a scraper are arranged at the bottom of the telescopic chute.

[0006] Preferably, the automatic bulk material loading system is connected to a signal control system; an intelligent camera is provided at the right end of the sealed ceiling, and a floor scale is provided on the ground below the storage warehouse; the intelligent camera, the floor scale, the valve switch mechanism and the travel motor are communicatively connected to the signal control system.

[0007] Preferably, a sealing ceiling is installed around the discharge valve, and a movable sealing strip that seals with the sealing ceiling is provided on the top surface of the receiving hopper.

[0008] Preferably, the movable sealing strip is a dense-bristle brush or soft leather.

[0009] Preferably, the side of the receiving hopper is connected to a dust removal device, and the dust removal device includes a dust removal filter element and a pulse valve and a dust removal fan connected to the receiving hopper. A dust collection hopper is arranged below the dust removal filter element and the pulse valve. The bottom of the dust collection hopper is connected to a vertical screw conveyor, and the terminal of the vertical screw conveyor is connected to the receiving hopper.

[0010] Preferably, the telescopic chute comprises a fixed section fixedly connected to the bottom of the receiving hopper, a plurality of intermediate movable sections and a bottom movable section, the fixed section, the intermediate movable section and the bottom movable section are all cylindrical; the fixed section and the intermediate movable section are connected in the following sleeve manner: a lower roller sleeve is provided at the bottom end of the outer wall of the fixed section, and a lower roller is installed in the lower roller sleeve; an upper roller sleeve is provided at the top end of the inner wall of the intermediate movable section, and an upper roller is installed in the upper roller sleeve; the intermediate movable section is sleeved on the outer periphery of the fixed section, and the axle of the lower roller and the axle of the upper roller are on the same vertical plane; the plurality of intermediate movable sections in the telescopic chute and the intermediate movable section and the bottom movable section are connected in the same sleeve manner; the bottom movable section A first pulley fixing frame and a second pulley fixing frame are symmetrically arranged on the outer walls on both sides, and the first pulley and the second pulley are respectively fixed on the first pulley fixing frame and the second pulley fixing frame; a winch is arranged on the frame, and the first steel wire rope and the second steel wire rope of the winch pass through the first pulley and the second pulley respectively to lift the bottom movable joint; a synchronous pull rod mechanism is arranged on the outer side surface of the telescopic chute, and the synchronous pull rod mechanism includes a plurality of strut systems; the strut system includes a first strut, a second strut and a pin shaft, and the first strut and the second strut are cross-hinged by the pin shaft; the upper part of the outer side of the fixed joint, each of the intermediate movable joints and the bottom movable joint is respectively fixed with the pin shaft of the strut system; the upper and lower adjacent strut systems are hinged to each other.

[0011] Preferably, there are multiple synchronous pull rod mechanisms, which are symmetrically arranged on different outer sides of the telescopic chute.

[0012] Preferably, the valve switch mechanism includes a door panel, a folding long rod, a folding short rod and a valve hydraulic cylinder fixed at the bottom of the telescopic chute, the folding long rod and the folding short rod are hinged to the telescopic rod of the valve hydraulic cylinder, the door panel is movably inserted at the bottom opening of the telescopic chute, the outer end of the door panel is hinged to the other end of the folding short rod, and the other end of the folding long rod is hinged to the bottom of the telescopic chute; the valve hydraulic cylinder telescopically pushes and pulls the folding long rod and the folding short rod to switch the door panel; the valve switch mechanism is at least two pairs arranged in relative pairs, wherein the door panels of one pair of the valve switch mechanisms are small door panels with a smaller length; the door panels of the other pair of the valve switch mechanisms are large door panels with a larger length, and the large door panels are a pair of serrated door panels that bite into each other.

[0013] Preferably, a driving wheel and a driven wheel are provided on the frame, and the travel motor drives the driving wheel to travel on the track.

[0014] The beneficial effects of the present invention are:

[0015] The automatic bulk material loading system of the present invention is provided with a mobile bulk loader that can move, and a scraper plate is provided at the bottom of the telescopic chute of the mobile bulk loader. When loading bulk materials, the mobile bulk loader automatically loads the transport vehicle box when moving forward, and automatically levels the material tip through the scraper plate, so that the material pile has no hump; when the mobile bulk loader returns, the material stored in the telescopic chute is emptied. The entire loading process does not require the driver to move the vehicle to pick up the material, nor does it require the unloader and the driver to cooperate in loading. During the loading process, a small material pile can be initially formed at the bottom of the telescopic chute, and then the mobile bulk loader can be used to drag the material horizontally for loading. The material slides down along the initially formed material pile and is gradually and continuously spread horizontally for loading. The impact force of the material sliding down is small, and it is not easy to generate dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the working state of the automatic bulk material loading system of the present invention.

[0017] Figure 2 for Figure 1 Enlarged view of point A.

[0018] Figure 3 for Figure 1 Enlarged view of point B.

[0019] Figure 4 for Figure 1 Right view of .

[0020] Figure 5 for Figure 4 Enlarged view of point C.

[0021] Figure 6 A top view of the mobile bulk loader.

[0022] Figure 7 for Figure 6 EE section view.

[0023] Figure 8 for Figure 7 Enlarged view of point D.

[0024] Fig. 9 for Figure 6 FF section view.

[0025] Fig.10 for Fig. 9 Left view of .

[0026] Fig.11 When the valve switch mechanism at the bottom of the telescopic chute is in the open state Figure 7 GG section view.

[0027] Fig.12 When the valve switch mechanism at the bottom of the telescopic chute is in the closed state Figure 7 GG section view.

[0028] In the figure:

[0029] 1. Storage warehouse; 11. Sealed ceiling; 12. Discharge valve; 121. Baffle; 122. Discharge cylinder; 13, 14, 15. Discharge port; 2. Track bracket; 21. Track; 3. Mobile bulk loader; 31. Frame; 32. Driving wheel; 34. Travel motor; 35. Receiving hopper; 36. Telescopic chute; 361. Fixed joint; 362. First intermediate movable joint; 363. Second intermediate movable joint; 364. Lower roller sleeve; 365. Lower roller; 366. Upper roller sleeve; 367. Upper roller; 368. Third intermediate movable joint; 369. Bottom movable joint; 370. Valve switch mechanism; 37. First valve switch mechanism; 371. Large discharge port; 372. Large door panel; 373. First folding long rod; 374. First folding short rod; 375. Large valve hydraulic cylinder; 38. First Two valve switch mechanisms; 381, small discharge port; 382, ​​small door panel; 383, second folding long rod; 384, second folding short rod; 385, small valve hydraulic cylinder; 39, scraper plate; 4, synchronous pull rod mechanism; 41, first pulley fixing frame; 42, first pulley; 43, first steel wire rope; 44, second pulley fixing frame; 45, second pulley; 46, second steel wire rope; 47, first support rod system; 471, first support rod; 472, second support rod; 473, first pin shaft; 48, second support rod system; 481, second pin shaft; 49, winch; 5, intelligent camera; 6, transport vehicle; 7, weighing scale; 8, movable sealing strip; 91, dust removal filter element and pulse valve; 92, dust removal fan; 93, dust collection bucket; 94, horizontal screw conveyor; 95, vertical screw conveyor. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the working state of the automatic bulk material loading system of the present invention. Figure 2 for Figure 1 A magnified image of Figure 3 for Figure 1 The enlarged view of point B, Figure 4 for Figure 1 Right view of Figure 5 for Figure 4 The enlarged view of point C, Figure 6 The top view of the mobile bulk loader. Figure 7 for Figure 6 EE section view.

[0032] like Figure 1 , 2As shown in Figures 4 and 5, an automatic bulk material loading system of the present invention comprises a storage bin 1, a track bracket 2, a track 21 and a mobile bulk loader 3. The bottom of the storage bin 1 is provided with a plurality of discharge ports equipped with discharge valves 12, such as discharge ports 13, 14, 15, etc., and the plurality of discharge ports are arranged in a straight line. The track bracket 2 is fixed to the bottom of the storage bin 1, and the track 21 is installed on the track bracket 2 along the arrangement direction of the discharge ports 13, 14, 15. Figure 1 , 4 As shown in Figures 5 and 6, the mobile bulk loader 3 includes a frame 31, a travel motor 34, a receiving hopper 35 and a telescopic chute 36. The frame 31 is driven by the travel motor 34, and the track 21 is used for the frame 31 to travel; the receiving hopper 35 is fixed on the frame 31, and the length of the receiving hopper 35 along the track 21 is greater than the distance between any two adjacent discharge ports. The bottom of the receiving hopper 35 is sealed and connected to the telescopic chute 36. Figure 3 As shown, a valve switch mechanism 370 and a scraper plate 39 are provided at the bottom of the telescopic chute 36 .

[0033] The discharge valve can be used in any common manner, such as Figure 2 As shown: the discharge valve 12 includes a baffle 121 and a discharge cylinder or hydraulic cylinder 122, and the piston rod of the discharge cylinder 122 pushes and pulls the baffle 121 to open and close the discharge port 15. Using the discharge cylinder 122 to open and close the discharge port is not only convenient, but also easier to connect with the signal control system to realize automatic control.

[0034] Working principle:

[0035] When the bulk material automatic loading system of the present invention is in operation, Figure 1As shown, the transport vehicle 6 is moved to the bottom of the storage silo 1. The travel motor 34 is turned on to make the frame 31 move on the track 21, so that the mobile bulk loader 3 is moved to the head of the transport vehicle 6. The telescopic chute 36 is opened and extended to make its bottom drop to contact the bottom of the transport vehicle 6, and the discharge valve on the discharge port just above the receiving hopper 35 is opened to discharge the material. When the height of the bulk material filled into the telescopic chute 36 reaches 1 / 5 to 1 / 3 of the height of the material tip, the valve switch mechanism 370 at the bottom of the telescopic chute 36 is opened to discharge the material, and the telescopic chute 36 is slowly moved up to the height of the material tip, and then the mobile bulk loader 3 begins to move slowly horizontally at a uniform speed toward the tail of the vehicle on the track 21. During the movement of the mobile bulk loader 3, the discharge valve just above the mobile bulk loader 3 is automatically opened, and the discharge valve at the left position is automatically closed. As the mobile bulk loader 3 moves toward the rear of the vehicle, the bulk material in the storage bin 1 slides down from the discharge port and is loaded into the box of the transport vehicle 6 as the telescopic chute 36 is dragged horizontally; at the same time, during the horizontal movement and loading process of the mobile bulk loader 3, the scraper plate 39 scrapes the uneven material tips flat, and when the mobile bulk loader 3 moves to the rear of the box of the transport vehicle 6, the unloading valves at the bottom of the storage bin 1 are all closed, the mobile bulk loader 3 moves slightly upward to a height close to the material tip, and then returns horizontally in the opposite direction. During the return process, the scraper plate 39 scrapes the uneven material tips flat again, and at the same time, all the remaining materials in the telescopic chute 36 are also cleaned into the box. After returning to the original position, the telescopic chute 36 is folded and retracted to complete the automatic loading of the bulk material. In this process, the mobile bulk loader 3 moves along the track 21, and automatically loads and automatically scrapes the material tip during the movement; during the return journey of the mobile bulk loader 3, the scraper plate 39 automatically scrapes the material tip again to make the loaded material have no hump; there is no need for the driver to move the vehicle to pick up the material, and there is no need for the unloader and the driver to cooperate in loading. The bulk material automatic loading system of the present invention first forms a small material pile in the telescopic chute during the loading process, and can keep the material at the discharge port during the unloading process, forming a material seal in the entire telescopic chute, and then the mobile bulk loader 3 drags the loading horizontally, and the material slides down along the initially formed material pile, with a small impact force. The chute is relatively sealed during the entire loading process, and no dust is generated.

[0036] Example 1

[0037] The bulk material automatic loading system of this embodiment is preferably equipped with a signal control system, and an intelligent camera 5 is provided at the right end below the storage warehouse 1. Figure 1As shown, a floor scale 7 is provided on the ground below the storage depot 1. The intelligent camera 5, the floor scale 7, the valve switch mechanism 370 and the travel motor 34 are communicatively connected to the signal control system. In this way, unattended operation can be completely realized: after the intelligent camera 5 monitors that the transport vehicle 6 that needs to be loaded has arrived at the loading position, the floor scale 7 automatically weighs the empty vehicle weight and transmits the signal to the signal control system. The signal control system calculates the required amount of loaded materials and the height of the material tip after loading according to the carriage parameters of the transport vehicle 6, such as length, width, height, etc., and then calculates the loading speed and converts it into the extension height and travel speed of the mobile bulk loader 3, so as to automatically move forward to load and level the material tip, completing the entire loading process without manual operation, and the loading amount is accurate, and there will be no phenomenon such as spilling of materials due to poor coordination.

[0038] The bulk material automatic loading system of the present invention is preferably equipped with a sealing ceiling 11 around each of the unloading valves, and the top surface of the receiving hopper 35 is provided with a movable sealing strip 8 sealed with the sealing ceiling 11. More preferably, the movable sealing strip 8 is a dense brush or soft leather. The sealing ceiling 11 and the movable sealing strip 8 are provided to seal each other, which can be opened when bulk material passes through, and automatically sealed when no bulk material passes through, so as to maximize the dust generated in the mobile bulk loader, and will not fly into the air to cause pollution, which is more environmentally friendly.

[0039] Example 2

[0040] The bulk material automatic loading system of this embodiment is preferably connected to a dust removal device on the side of the receiving hopper 35, such as Figure 6 , 9 As shown, Fig. 9 for Figure 6 FF sectional view: the dust removal device includes a dust removal filter element and a pulse valve 91 and a dust removal fan 92 connected to the receiving hopper 35, a dust collection hopper 93 is arranged below the dust removal filter element and the pulse valve 91, the bottom of the dust collection hopper 93 is connected to a vertical screw conveyor 95, and the terminal of the vertical screw conveyor 95 is connected to the receiving hopper 35. A horizontal screw conveyor 94 can also be connected to the bottom of the dust collection hopper 93, and the horizontal screw conveyor 94 collects the powder collected by the dust collection hopper 93 at the bottom of the vertical screw conveyor 95 for easy transportation.

[0041] During the loading process, the dust in the telescopic chute 36 generated by the first unloading and the small amount of dust generated by the horizontal dragging of the material to slide down rise to the receiving hopper 35, and the dust removal fan 92 exhausts air. The dust is filtered, adsorbed and collected by the dust removal filter element and pulse valve 91 connected to the receiving hopper 35, so that it will not fly into the air. After the collected dust falls into the dust collection hopper 93, it is transported to the receiving hopper 35 connected to its terminal by the vertical screw conveyor 95 at the bottom of the dust collection hopper 93, and then enters the telescopic chute 36 again to continue to be loaded into the transport vehicle 6, which minimizes environmental pollution and material waste.

[0042] Example 3

[0043] The structure of the telescopic chute of the bulk material automatic loading system of this embodiment is as follows Figure 7 As shown, it includes a fixed section 361, a first intermediate movable section 362, a second intermediate movable section 363, a third intermediate movable section 368 and a bottom movable section 369 which are fixedly connected to the bottom of the receiving hopper 35. The fixed section 361, the first intermediate movable section 362, the second intermediate movable section 363, the third intermediate movable section 368 and the bottom movable section 369 are all cylindrical, and the connection methods among them all adopt the same set connection method. Figure 8 for Figure 7 The enlarged view of the D portion of FIG. 36 is a schematic diagram of the set connection between the fixed section 361 and the first intermediate movable section 362, as shown in FIG. Figure 8 As shown: a lower roller sleeve 364 is provided at the bottom end of the outer wall of the fixed section 361, and a lower roller 365 is installed in the lower roller sleeve 364; an upper roller sleeve 366 is provided at the top end of the inner wall of the first intermediate movable section 362, and an upper roller 367 is installed in the upper roller sleeve 366; the first intermediate movable section 362 is sleeved on the outer periphery of the fixed section 361, and the axle of the lower roller 365 and the axle of the upper roller 367 are on the same vertical plane.

[0044] Fig. 9 for Figure 6 FF section view, Fig.10 for Fig. 9 The left view of Figure 6 , 9 As shown in Figure 10, the outer walls of both sides of the bottom movable section 369 are symmetrically provided with a first pulley fixing frame 41 and a second pulley fixing frame 44, and the first pulley 42 and the second pulley 45 are fixed on the first pulley fixing frame 41 and the second pulley fixing frame 44 respectively; the frame 31 is provided with a winch 49, and the first steel wire rope 43 and the second steel wire rope 46 of the winch 49 pass through the first pulley 42 and the second pulley 45 respectively to hoist the bottom movable section 369; the outer surface of the telescopic chute is provided with a synchronous pull rod mechanism, and the synchronous pull rod mechanism includes a plurality of support rod systems. Fig.10The first strut system 47 and the second strut system 48 in the embodiment include a first strut system 47 including a first strut 471, a second strut 472 and a first pin 473. The first strut system 471 and the second strut 472 are cross-hinged by the first pin 473. The first pin 473 is fixed to the upper part of the outer side of the first intermediate movable section 362, and the second pin 481 is fixed to the upper part of the outer side of the second intermediate movable section 363. The first strut system 47 and the second strut system 48 are hinged to each other. The pins of the strut system are respectively fixed to the upper part of the outer side of the fixed section 361, each of the intermediate movable sections and the bottom movable section 369; the upper and lower adjacent strut systems are hinged to each other.

[0045] Working principle:

[0046] When loading, the automatic loading system for bulk materials of this embodiment starts the winch 49, and the winch 49 winds up the first steel wire rope 43 and the second steel wire rope 46 to release them and extend them. The bottom movable joint 369 moves downward under the action of gravity, pulling the mutually hinged support rod systems in the synchronous pull rod mechanism to extend them synchronously, so that the bottom movable joint 369 and each intermediate movable joint of the telescopic chute slide and extend along the sleeved rollers. The synchronous pull rod mechanism is a mutually hinged support rod system, which has a certain supporting function. Therefore, after it is extended to the required length, it can be dragged horizontally with the material and maintain a certain length without shrinking and deforming, so that the same material tip height can be ensured during the loading process, and the material pile height in the transport vehicle box after loading is ensured to be more relatively consistent without hump. The rollers are arranged between the fixed joint and each intermediate movable joint to slide mutually so that the telescopic chute runs smoothly and has low friction when extending and retracting. The synchronous pull rod mechanism can be provided with one each on two opposite and symmetrical sides of the telescopic chute, or can be provided with a plurality of each on two opposite and symmetrical sides.

[0047] Example 4

[0048] The valve switch mechanism of the bulk material automatic loading system of this embodiment is as follows: Fig.11 , 12 As shown ( Fig.11 When the valve switch mechanism at the bottom of the telescopic chute is in the open state Figure 7 The GG section view, Fig.12 When the valve switch mechanism at the bottom of the telescopic chute is in the closed state Figure 7 The valve switch mechanism is arranged in pairs: the first valve switch mechanism 37 and Fig.11 , 12 The valve switch mechanism below the first valve switch mechanism 37 is a first pair of valve switch mechanisms with completely symmetrical structures; the second valve switch mechanism 38 and Fig.11 , 12The valve switch mechanism below the second valve switch mechanism 38 is a second pair of completely symmetrical structures; the two pairs of valve switch mechanisms are arranged side by side along the track direction. Among them, the first valve switch mechanism 37 of the first pair of valve switch mechanisms includes a large door plate 372, a first folding long rod 373, a first folding short rod 374 and a large valve hydraulic cylinder 375 fixed to the bottom of the telescopic chute. The first folding long rod 373 and the first folding short rod 374 are hinged to the telescopic rod of the large valve hydraulic cylinder 375, and the large door plate 372 is movably plugged into the large discharge port 371 at the bottom of the telescopic chute. The large door plate 372 is a sawtooth door plate. The outer end of the large door panel 372 is hinged to the other end of the first folding short rod 374, and the other end of the first folding long rod 373 is hinged to the bottom of the telescopic chute; the large valve hydraulic cylinder 375 telescopically pushes and pulls the first folding long rod 373 and the first folding short rod 374 to open and close the large door panel 372, and the two relatively arranged large door panels move toward or away from each other to complete the closing and opening of the large discharge port 371. The second pair of valve switch mechanisms 38 include a small door panel 382, ​​a second folding long rod 383, a second folding short rod 384, and a small valve hydraulic cylinder 385 fixed to the bottom of the telescopic chute. The second folding long rod 383 and the second folding short rod 384 are hinged to the telescopic rod of the small valve hydraulic cylinder 385, and the small door panel 382 is movably plugged into the small discharge port 381 of the telescopic chute. The outer end of the small door plate 382 is hinged to the other end of the second folding short rod 384, and the other end of the second folding long rod 383 is hinged to the bottom of the telescopic chute; the small valve hydraulic cylinder 385 telescopically pushes and pulls the second folding long rod 383 and the second folding short rod 384 to open and close the small door plate 382, ​​and the two relatively arranged small door plates move towards or away from each other to complete the closing and opening of the small discharge port 381.

[0049] At the beginning of loading, the mobile bulk loader 3 extends the telescopic chute 36 so that its bottom drops to contact the bottom of the car body. At this time, the large discharge port 371 and the small discharge port 381 are closed by the paired large door panels 372 and the small door panels 382 respectively. When the height of the bulk material filling the telescopic chute 36 reaches 1 / 5 to 1 / 3 of the height of the material tip, the large valve hydraulic cylinder 375 and the small valve hydraulic cylinder 385 extend at the same time, and the small valve hydraulic cylinder 385 pushes the second folding long rod 383 and the second folding short rod 384 to open the small door panel 382. The large valve hydraulic cylinder 375 pushes the first folding long rod 373 and the first folding short rod 374 to open the large door panel 372, and the large door panel and the small door panel on the opposite side are opened at the same time to discharge the material. During the horizontal dragging and unloading process of the mobile bulk loader, the first pair of valve switch mechanisms are closed, and the second pair of valve switch mechanisms with only a pair of small door panels are unloaded during the horizontal dragging process. In this way, the material at the large discharge port 371 is shielded by the large door panels and buffered by 372 during unloading, so as to prevent a large amount of dust from appearing, and at the same time, the friction of aggregates on the bottom of the telescopic chute during the dragging process can be reduced. When the mobile bulk loader 3 is returning, the two pairs of valve switch mechanisms are opened at the same time, and the residual material in the telescopic chute 36 continues to fall and clean up, and the scraper plate 39 flattens the material tip again. The sawtooth-shaped large door panels are convenient for inserting into the material to completely close the large discharge port 371 when a pair of large door panels are relatively merged and closed. The valve switch mechanism in this embodiment adopts a connection method in which a folding long rod and a folding short rod are jointly hinged to the valve hydraulic cylinder. Compared with the connection method in which the valve hydraulic cylinder piston rod is directly used to push and pull the large door panel or the small door panel, the stroke required by the valve hydraulic cylinder is short, which saves more space.

[0050] More preferably, a driving wheel 32 and a driven wheel are provided on the frame 31 , and the travel motor 34 drives the driving wheel 32 to travel on the track 21 .

[0051] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other. In addition, the above are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

Claims

1. A bulk material automatic loading system, characterized in that: It comprises a material storage bin, a track bracket, a track and a mobile bulk loader; a plurality of discharge ports equipped with discharge valves are arranged at the bottom of the material storage bin, and the plurality of discharge ports are arranged in a straight line; the track bracket is fixed to the bottom of the material storage bin, and the track is installed on the track bracket along the arrangement direction of the plurality of discharge ports; the mobile bulk loader comprises a frame, a travel motor, a receiving hopper and a telescopic chute, the frame is driven by the travel motor, and the track is used for the frame to travel; the receiving hopper is fixed on the frame, and the length of the receiving hopper along the direction of the track is greater than the distance between any two adjacent discharge ports; the bottom of the receiving hopper is sealed and connected to the telescopic chute, and a valve switch mechanism and a scraper are arranged at the bottom of the telescopic chute; The telescopic chute comprises a fixed section fixedly connected to the bottom of the receiving hopper, a plurality of intermediate movable sections and a bottom movable section, wherein the fixed section, the intermediate movable section and the bottom movable section are all cylindrical; the fixed section and the intermediate movable section are connected in the following sleeve-type manner: a lower roller sleeve is provided at the bottom end of the outer wall of the fixed section, and a lower roller is installed in the lower roller sleeve; an upper roller sleeve is provided at the top end of the inner wall of the intermediate movable section, and an upper roller is installed in the upper roller sleeve; the intermediate movable section is sleeved on the outer periphery of the fixed section, and the axle of the lower roller and the axle of the upper roller are on the same vertical plane; the plurality of intermediate movable sections in the telescopic chute and the intermediate movable section and the bottom movable section are connected in the same sleeve-type manner; A first pulley fixing frame and a second pulley fixing frame are symmetrically arranged on the outer walls on both sides of the bottom movable joint, and the first pulley and the second pulley are respectively fixed on the first pulley fixing frame and the second pulley fixing frame; a winch is arranged on the frame, and the first steel wire rope and the second steel wire rope of the winch pass through the first pulley and the second pulley respectively to hoist the bottom movable joint; A synchronous pull rod mechanism is arranged on the outer side of the telescopic chute, and the synchronous pull rod mechanism includes a plurality of strut rod systems; the strut rod system includes a first strut rod, a second strut rod and a pin, and the first strut rod and the second strut rod are cross-hinged by the pin; the pins of the strut rod system are respectively fixed to the upper part of the outer side of the fixed section, each of the intermediate movable sections and the bottom movable section; the upper and lower adjacent strut rod systems are hinged to each other; The valve switch mechanism includes a door plate, a folding long rod, a folding short rod and a valve hydraulic cylinder fixed at the bottom of the telescopic chute, the folding long rod and the folding short rod are hinged to the telescopic rod of the valve hydraulic cylinder, the door plate is movably inserted at the bottom opening of the telescopic chute, the outer end of the door plate is hinged to the other end of the folding short rod, and the other end of the folding long rod is hinged to the bottom of the telescopic chute; the valve hydraulic cylinder telescopically pushes and pulls the folding long rod and the folding short rod to open and close the door plate; the valve switch mechanism is at least two pairs arranged in pairs, wherein the door plates of one pair of the valve switch mechanisms are small door plates with a shorter length; the door plates of the other pair of the valve switch mechanisms are large door plates with a longer length, and the large door plates are a pair of serrated door plates that bite each other.

2. The automatic bulk material loading system according to claim 1, characterized in that: The automatic bulk material loading system is connected to a signal control system; an intelligent camera is arranged at the right end below the storage warehouse, and a floor scale is arranged on the ground below the storage warehouse; the intelligent camera, the floor scale, the valve switch mechanism and the travel motor are communicatively connected to the signal control system.

3. The automatic bulk material loading system according to claim 1, characterized in that: A sealing ceiling is installed around the discharge valve, and a movable sealing strip which is sealed with the sealing ceiling is arranged on the top surface of the receiving hopper.

4. The automatic bulk material loading system according to claim 3, characterized in that: The movable sealing strip is a dense brush or soft leather.

5. The automatic bulk material loading system according to claim 1, characterized in that: The side of the receiving hopper is connected to a dust removal device, which includes a dust removal filter element and a pulse valve and a dust removal fan connected to the receiving hopper. A dust collection hopper is arranged below the dust removal filter element and the pulse valve. The bottom of the dust collection hopper is connected to a vertical screw conveyor, and the terminal of the vertical screw conveyor is connected to the receiving hopper.

6. The automatic bulk material loading system according to claim 1, characterized in that: There are multiple synchronous pull rod mechanisms, which are symmetrically arranged on different outer sides of the telescopic chute.

7. The automatic bulk material loading system according to claim 1, characterized in that: The frame is provided with a driving wheel and a driven wheel, and the travel motor drives the driving wheel to travel on the track.

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