Gravel separator

Abstract

The invention provides a gravel separator, and belongs to the technical field of road and bridge construction equipment. The problem that the existing gravel distributing efficiency is low is solved. The gravel separator comprises a machine frame and a vibration hopper arranged on the machine frame, a screen is arranged at the upper end of the vibration hopper, a discharging hopper is arranged at the lower end of the vibration hopper, a discharging port is rectangular, and a conveying belt assembly is arranged below the discharging port. The driving roller and the driven roller are arranged on the rack, the conveying belt is arranged on the driving roller and the driven roller in a sleeving mode, the motor drives the driving roller to rotate, the conveying belt is arranged in the length direction of the discharging port, the width of the conveying belt is larger than that of the discharging port, and the length of the conveying belt is larger than that of the discharging port. And a blanking space is formed between the conveying belt and the discharge port. Due to the arrangement of the conveying belt of the structure, the discharging speed and the discharging amount of the gravel are remarkably increased, and then the material distributing efficiency of the gravel material distributing machine is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of road and bridge construction equipment, in particular to a sand and gravel distributor. Background Art

[0002] During the construction of road and bridge projects, a large amount of sand and gravel are needed as raw materials. The sand and gravel need to be screened before use. The larger stones need to be filtered out, leaving the sand and gravel within a certain size range. Currently, vibrating screens are generally used for screening to remove large particles of debris.

[0003] At present, China Patent Network discloses a vibrating screen for sand making [Authorization Announcement No.: CN216126060U], including a screen box, the screen box is inclined, a support frame is arranged at the bottom of the screen box, the support frame includes four support columns distributed in a rectangular shape, a connecting rod is arranged between two adjacent support columns, the connecting rod is welded to the support column, a fixed bottom plate is installed at the bottom of the support column, a connecting plate is installed on the top of the support column, a vibration motor is installed on the front end surface of the screen box, connecting seats are installed on both sides of the front and rear ends of the screen box, the positions of the four connecting seats correspond to the positions of the four connecting plates one by one, a vibration-damping spring is arranged between the connecting seats and the connecting plates at corresponding positions, and the two ends of the vibration-damping spring are fixedly connected to the connecting seat and the connecting plate respectively, a feeding mechanism is arranged on the top of the higher end of the screen box, and a first screen, a second screen and a third screen are arranged in sequence from top to bottom inside the screen box.

[0004] The above-mentioned vibrating screen has the following defects: the first discharge port at the bottom of the screen box is arranged in the horizontal direction, the size of the discharge port is small, and the discharge of sand and gravel adopts vibration extrusion type discharge, which leads to a very slow discharge speed and affects the sand and gravel distribution efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the existing technology and to propose a sand and gravel dividing machine. The technical problem to be solved by the present invention is: how to improve the sand and gravel dividing efficiency.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A sand and gravel divider comprises a frame and a vibrating hopper arranged on the frame, a screen is arranged at the upper end of the vibrating hopper, and a discharge hopper is arranged at the lower end of the vibrating hopper, characterized in that the discharge port is rectangular, and a conveyor belt assembly is arranged below the discharge port, the conveyor belt assembly comprises an active roller and a driven roller arranged on the frame, a conveyor belt sleeved on the active roller and the driven roller, and a motor driving the active roller to rotate, the conveyor belt is arranged along the length direction of the discharge port, the width of the conveyor belt is greater than the width of the discharge port, the length of the conveyor belt is greater than the length of the discharge port, and there is a drop spacing between the conveyor belt and the discharge port.

[0008] Working principle: Pour the sand and gravel onto the screen. After the vibrating hopper vibrates, the sand and gravel particles of corresponding size on the screen fall into the vibrating hopper through the screen. The sand and gravel particles fall onto the conveyor belt through the discharge port. The motor drives the conveyor belt to rotate and transport the sand and gravel particles forward in the horizontal direction. This structure sets the discharge port in a rectangular shape, that is, the length direction of the discharge port is the conveying direction of the conveyor belt. The drop spacing is set so that a certain height of sand and gravel can be piled on the conveyor belt, which increases the conveying capacity of the conveyor belt for sand and gravel. The size of the conveyor belt is significantly larger than the size of the discharge port, that is, the conveyor belt can fully bear the amount of sand and gravel leaking from the discharge port, thereby ensuring the conveying capacity of sand and gravel. The setting of the conveyor belt significantly increases the discharge speed and discharge volume of sand and gravel, thereby improving the separation efficiency of the sand and gravel divider.

[0009] In the above-mentioned sand and gravel distributor, the conveyor belt assembly also includes support plates located on the left and right sides of the conveyor belt, the support plates are fixed on the frame, and rollers are arranged between the two support plates. There are a plurality of rollers, and all rollers are arranged at intervals along the length direction of the conveyor belt. Both ends of each roller are connected to the corresponding support plates, and the outer peripheral surfaces of all rollers are in contact with the lower surface of the upper part of the conveyor belt. Since the sand and gravel have a certain weight, the sand and gravel fall on the upper surface of the upper part of the conveyor belt. The setting of the rollers supports the upper part of the conveyor belt to prevent the upper part of the conveyor belt from collapsing, and ensure that the conveyor belt can stably transport sand and gravel.

[0010] In the above-mentioned sand and gravel divider, a rectangular positioning groove is provided at the upper end of the bracket plate, and there are several positioning grooves, all of which are arranged at intervals along the length direction of the conveyor belt. Both ends of the roller have mounting shafts, and the mounting shafts are inserted into the positioning grooves. The opposite sides of the mounting shafts have vertical limit surfaces that match the positioning grooves. When installing the roller, it is only necessary to align the mounting shafts at both ends of the roller with the corresponding positioning grooves, and then put the mounting shafts at both ends of the roller into the positioning grooves from top to bottom. The installation and disassembly of the roller is convenient. After the mounting shaft is inserted into the positioning groove, the two vertical limit surfaces on the mounting shaft fit with the groove wall of the positioning groove, so that the mounting shaft can no longer rotate in the positioning groove, thereby realizing the circumferential positioning of the mounting shaft.

[0011] In the above-mentioned sand and gravel distributor, the conveyor belt assembly also includes two anti-deviation rollers, which are respectively located on the left and right sides of the middle of the conveyor belt, and the anti-deviation rollers are fixed on the frame. The setting of the two anti-deviation rollers ensures that the conveyor belt will not deviate left and right, thereby ensuring the stable conveying of sand and gravel by the conveyor belt.

[0012] In the above-mentioned sand and gravel distributor, the conveyor belt assembly further includes a scraper located below the lower part of the conveyor belt, the scraper is fixed on the frame, and the scraper has a triangular scraper blade, which is in contact with the lower surface of the lower part of the conveyor belt. The surface of the sand and gravel will be stained with mud, and the mud will be stained on the outer surface of the conveyor belt during the process of conveying sand and gravel. The triangular scraper blade on the scraper scrapes off the mud stained on the outer surface of the conveyor belt.

[0013] In the above-mentioned sand and gravel distributor, the vibrating hopper has inner side wall one, inner side wall two, inner side wall three and inner side wall four, and the inner side wall one, inner side wall two, inner side wall three and inner side wall four are all inclinedly arranged, and a metal mesh cover with a certain elasticity is arranged in the vibrating hopper, and the metal mesh cover has side cover body one, side cover body two, side cover body three and side cover body four, and the side cover body one, side cover body two, side cover body three and side cover body four are all inclinedly arranged, and there is a spacing between the side cover body one and the inner side wall one, between the side cover body two and the inner side wall two, between the side cover body three and the inner side wall three, and between the side cover body four and the inner side wall four, and the metal mesh cover has an upper port and a lower port, the upper end of the metal mesh cover is fixedly connected to the upper end of the vibrating hopper, and the lower end of the metal mesh cover is fixedly connected to the lower end of the vibrating hopper, and the upper end of the vibrating material head is provided with a screen, and the screen is located above the upper port of the metal mesh cover. In this structure, a metal mesh cover is arranged inside the vibrating hopper. The metal mesh cover has a certain elasticity. The upper and lower ends of the metal mesh cover are in a tightened state, and each side cover of the metal mesh cover is arranged with a distance from the inner wall of the vibrating hopper. When the machine is working, sand and gravel are piled on the screen, and then the vibrating hopper works, so that sand and gravel within a certain size range fall into the vibrating hopper and fall on the metal mesh cover. Since the metal mesh cover has a certain elasticity, the noise generated by the collision between the sand and gravel and the metal mesh cover is very small, thereby significantly reducing the noise of the distributor in The noise generated during operation is caused by the side covers of the metal mesh cover being set at an angle. After the sand and gravel fall on the metal mesh cover, they roll along the metal mesh cover and onto the conveyor belt. In addition, due to the distance between the metal mesh cover and the vibrating hopper, a storage space is formed between the metal mesh cover and the vibrating hopper. Since the metal mesh cover has fine mesh holes, when the sand and gravel collide with the metal mesh cover, the soil on the sand and gravel will be shaken off, and the fine mud will fall into the storage space, thereby reducing the amount of soil falling on the conveyor belt and extending the time for the conveyor belt to run smoothly.

[0014] In the above-mentioned sand and gravel classifier, two parallel beams are arranged in the vibrating hopper, both ends of the beams are fixed on the inner wall of the vibrating hopper, and the lower surface of each beam is provided with an inverted V-shaped mounting groove. A guide metal mesh is arranged in the vibrating hopper, and both sides of the guide metal mesh are embedded in the corresponding mounting grooves and fixed on the corresponding beams. The guide metal mesh is located above the lower port, and the projection of the guide metal mesh completely covers the lower port, and the guide metal mesh is in an inverted V shape. The upper surface of the crossbeam is in contact with the screen, that is, the crossbeam supports the screen, improves the load-bearing effect of the screen, and prevents the screen from being deformed due to bearing a large weight of sand and gravel; secondly, the crossbeam also provides an installation position for the guide metal mesh. After the side of the guide metal mesh is fixed in the installation groove, the overall shape of the guide metal mesh is also inverted V shape, and the projection of the guide metal mesh completely covers the lower port. The sand and gravel falling from the middle of the screen falls on the guide metal mesh and falls on the metal mesh cover along the guide metal mesh, preventing the sand and gravel from falling directly from the lower port onto the conveyor belt, thereby protecting the conveyor belt, extending the service life of the conveyor belt, and also reducing the working noise of the machine.

[0015] In the above-mentioned sand and gravel distributor, both ends of the crossbeam penetrate the metal mesh cover, and the metal mesh cover is fixedly connected to the crossbeam. After the metal mesh cover is fixedly connected to the crossbeam, the installation of the metal mesh cover is more stable and firm.

[0016] In the above-mentioned sand and gravel divider, the lower end of the vibrating hopper is bent inward to form an inner bending part, the lower end of the metal mesh cover is fixedly connected to the end of the inner bending part, a receiving groove is formed between the inner bending part and the inner wall of the metal mesh cover, an outer wall at the lower end of the metal mesh cover is provided with a discharge hole connected to the receiving groove, and an outer wall at the lower end of the metal mesh cover is fixed with an inclined guide plate at the position corresponding to the discharge hole. The inner bending part is used to be fixedly connected with the lower end of the metal mesh cover, and the receiving groove is used to prevent soil from falling onto the conveyor belt and to hold the soil. When a certain amount of soil is accumulated in the storage space, the worker can hold a tool, and the tool extends into the receiving groove through the discharge hole to dig the soil out of the receiving groove. The guide plate is used to guide the soil.

[0017] Compared with the prior art, the sand and gravel divider of the present invention has the following advantages: the structure sets the discharge port in a rectangular shape, that is, the length direction of the discharge port is the conveying direction of the conveyor belt, and the drop spacing is set so that sand and gravel of a certain height can be accumulated on the conveyor belt, thereby increasing the conveying capacity of the conveyor belt for sand and gravel. The size of the conveyor belt is significantly larger than the size of the discharge port, that is, the conveyor belt can fully accommodate the amount of sand and gravel leaking from the discharge port, thereby ensuring the conveying capacity of sand and gravel. The setting of the conveyor belt significantly increases the discharge speed and discharge amount of sand and gravel, thereby improving the dividing efficiency of the sand and gravel divider. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention.

[0019] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the conveyor belt assembly of the present invention.

[0021] Figure 4 yes Figure 3 Schematic diagram of the enlarged structure of part A in the middle.

[0022] Figure 5 It is one of the partial three-dimensional structural schematic diagrams of the present invention.

[0023] Figure 6 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 7 This is the second schematic diagram of the local three-dimensional structure of the present invention.

[0025] Figure 8 It is the third schematic diagram of the local three-dimensional structure of the present invention.

[0026] Fig. 9 This is the fourth schematic diagram of the local three-dimensional structure of the present invention.

[0027] Fig.10 This is the fifth partial three-dimensional structural schematic diagram of the present invention.

[0028] Fig.11 It is a partial cross-sectional structural schematic diagram of the present invention.

[0029] In the figure, 1, frame; 2, vibrating hopper; 20, discharge port; 21, inner wall one; 22, inner wall two; 23, inner wall three; 24, inner wall four; 25, inner bending part; 3, screen; 4, conveyor belt assembly; 40, active roller; 41, driven roller; 42, conveyor belt; 43, motor; 44, bracket plate; 440, positioning groove; 45, roller; 450, mounting shaft; 451, vertical limit surface; 46, anti-deviation roller; 47, scraper plate; 470, scraper blade; 5, metal mesh cover; 50, side cover body one; 51, side cover body two; 52, side cover body three; 53, side cover body four; 54, upper port; 55, lower port; 56, discharge hole; 6, screen; 7, crossbeam; 70, mounting groove; 8, guide metal mesh; 9, receiving groove; 10, guide plate. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] like Figure 1 to Figure 4 As shown, the sand and gravel classifier includes a frame 1 and a vibrating hopper 2 arranged on the frame 1, a screen 3 is arranged at the upper end of the vibrating hopper 2, a discharge port 20 is provided at the lower end of the vibrating hopper 2, the discharge port 20 is rectangular, and a conveyor belt assembly 4 is arranged below the discharge port 20, the conveyor belt assembly 4 includes an active roller 40 and a driven roller 41 arranged on the frame 1, a conveyor belt 42 sleeved on the active roller 40 and the driven roller 41, and a motor 43 for driving the active roller 40 to rotate, the conveyor belt 42 is arranged along the length direction of the discharge port 20, the width of the conveyor belt 42 is greater than the width of the discharge port 20, the length of the conveyor belt 42 is greater than the length of the discharge port 20, and there is a material dropping spacing between the conveyor belt 42 and the discharge port 20. Pour the sand and gravel onto the screen 3. After the vibrating hopper 2 vibrates, the sand and gravel particles of corresponding size on the screen 3 fall into the vibrating hopper 2 through the screen 3. The sand and gravel particles fall onto the conveyor belt 42 through the discharge port 20. The motor 43 drives the conveyor belt 42 to rotate, and the sand and gravel particles are transported forward in the horizontal direction. In this structure, the discharge port 20 is set in a rectangular shape, that is, the length direction of the discharge port 20 is the conveying direction of the conveyor belt 42. The drop spacing is set so that a certain height of sand and gravel can be piled on the conveyor belt 42, thereby increasing the conveying capacity of the conveyor belt 42 for sand and gravel. The size of the conveyor belt 42 is significantly larger than the size of the discharge port 20, that is, the conveyor belt 42 can completely bear the amount of sand and gravel leaking from the discharge port 20, thereby ensuring the conveying capacity of sand and gravel. The setting of the conveyor belt 42 significantly increases the discharge speed and discharge amount of sand and gravel, thereby increasing the material distribution efficiency of the sand and gravel distributor.

[0032] Furthermore, the conveyor belt assembly 4 also includes support plates 44 located on the left and right sides of the conveyor belt 42, the support plates 44 are fixed on the frame 1, and rollers 45 are arranged between the two support plates 44, and there are a plurality of rollers 45, all of which are arranged at intervals along the length direction of the conveyor belt 42, and both ends of each roller 45 are connected to the corresponding support plate 44, and the outer peripheral surfaces of all rollers 45 are in contact with the lower surface of the upper part of the conveyor belt 42. A rectangular positioning groove 440 is provided at the upper end of the support plate 44, and there are a plurality of positioning grooves 440, all of which are arranged at intervals along the length direction of the conveyor belt 42, and both ends of the roller 45 have mounting shafts 450, and the mounting shafts 450 are inserted into the positioning grooves 440, and the opposite sides of the mounting shafts 450 have vertical limit surfaces 451 adapted to the positioning grooves 440. Since the sand and gravel have a certain weight, the sand and gravel fall on the upper surface of the upper part of the conveyor belt 42. The setting of the roller 45 provides support for the upper part of the conveyor belt 42 to prevent the upper part of the conveyor belt 42 from collapsing, thereby ensuring that the conveyor belt 42 can stably transport the sand and gravel.

[0033] like Figure 3As shown, the conveyor belt assembly 4 also includes two anti-deviation rollers 46, which are respectively located on the left and right sides of the middle of the conveyor belt 42, and the anti-deviation rollers 46 are fixed on the frame 1. The arrangement of the two anti-deviation rollers 46 ensures that the conveyor belt 42 will not deviate left and right, thereby ensuring the stable conveying of sand and gravel by the conveyor belt 42.

[0034] like Figure 5 As shown, the conveyor belt assembly 4 also includes a scraper blade 47 located below the lower part of the conveyor belt 42. The scraper blade 47 is fixed on the frame 1. The scraper blade 47 has a triangular scraper blade 470, and the scraper blade 470 is in contact with the lower surface of the lower part of the conveyor belt 42. The surface of the sand and gravel will be stained with mud. When the conveyor belt 42 is conveying sand and gravel, the mud will be stained on the outer surface of the conveyor belt 42. The triangular scraper blade 470 on the scraper blade 47 scrapes off the mud stained on the outer surface of the conveyor belt 42.

[0035] like Figure 6 to Figure 11As shown, the vibrating hopper 2 has an inner wall 1 21, an inner wall 22, an inner wall 3 23 and an inner wall 4 24, and the inner wall 1 21, the inner wall 22, the inner wall 3 23 and the inner wall 4 24 are all arranged in an inclined manner. A metal mesh cover 5 with a certain elasticity is arranged in the vibrating hopper 2, and the metal mesh cover 5 has a side cover body 1 50, a side cover body 2 51, a side cover body 3 52 and a side cover body 4 53, and the side cover body 1 50, the side cover body 2 51, the side cover body 3 52 and the side cover body 4 53 are all arranged in an inclined manner. There is a spacing between the side cover body 1 50 and the inner wall 1 21, between the side cover body 2 51 and the inner wall 2 22, between the side cover body 3 52 and the inner wall 3 23, and between the side cover body 4 53 and the inner wall 4 24. The metal mesh cover 5 has an upper port 54 and a lower port 55. The upper end of the metal mesh cover 5 is fixedly connected to the upper end of the vibrating hopper 2, and the lower end of the metal mesh cover 5 is fixedly connected to the lower end of the vibrating hopper 2. The upper end of the vibrating hopper 2 is provided with a screen 6, and the screen 6 is located above the upper port 54. In this structure, a metal mesh cover 5 is arranged inside the vibrating hopper 2. The metal mesh cover 5 has a certain elasticity. The upper and lower ends of the metal mesh cover 5 are in a tightened state, and each side cover of the metal mesh cover 5 is arranged with a distance from the inner wall of the vibrating hopper 2. When the machine is working, sand and gravel are piled on the screen 6, and then the vibrating hopper 2 works, so that sand and gravel within a certain size range fall into the vibrating hopper 2, and the sand and gravel fall on the metal mesh cover 5. Since the metal mesh cover 5 has a certain elasticity, the noise generated after the sand and gravel collide with the metal mesh cover 5 is very small, thereby significantly reducing the noise of the distributor in The noise generated during operation, the side covers of the metal mesh cover 5 are all set at an angle, and the sand and gravel fall on the metal mesh cover 5 and roll along the metal mesh cover 5 onto the conveyor belt; in addition, due to the distance between the metal mesh cover 5 and the vibrating hopper 2, a storage space is formed between the metal mesh cover 5 and the vibrating hopper 2, and since the metal mesh cover 5 is distributed with fine mesh holes, when the sand and gravel collide with the metal mesh cover 5, the soil on the sand and gravel will be shaken off, and the fine mud will fall into the storage space, thereby reducing the amount of soil falling on the conveyor belt and extending the stable operation time of the conveyor belt 42.

[0036] The lower end of the vibrating hopper 2 is bent inward to form an inner bending portion 25, the lower end of the metal mesh cover 5 is fixedly connected to the end of the inner bending portion 25, a receiving groove 9 is formed between the inner bending portion 25 and the inner wall of the metal mesh cover 5, a discharge hole 56 connected to the receiving groove 9 is opened on an outer side wall of the lower end of the metal mesh cover 5, and a guide plate 10 arranged in an inclined manner is fixed on an outer side wall of the lower end of the metal mesh cover 5 at a position corresponding to the discharge hole 56. The setting of the inner bending portion 25 is used to be fixedly connected with the lower end of the metal mesh cover 5 on the one hand, and the setting of the receiving groove 9 prevents soil from falling on the conveyor belt 42, and is used to hold soil. When a certain amount of soil is accumulated in the storage space, the worker can hold a tool, and the tool extends into the receiving groove 9 through the discharge hole 56 to dig the soil out of the receiving groove 9, and the guide plate 10 is used to guide the soil to be dug out.

[0037] Two parallel beams 7 are arranged in the vibrating hopper 2, and both ends of the beams 7 are fixed on the inner wall of the vibrating hopper 2. Both ends of the beams 7 penetrate the metal mesh cover 5, and the metal mesh cover 5 is fixedly connected to the beams 7. The lower surface of each beam 7 is provided with an inverted V-shaped mounting groove 70, and a guide metal mesh 8 is arranged in the vibrating hopper 2. Both sides of the guide metal mesh 8 are embedded in the corresponding mounting groove 70 and fixed on the corresponding beam 7. The guide metal mesh 8 is located above the lower port 55, and the projection of the guide metal mesh 8 completely covers the lower port 55, and the guide metal mesh 8 is in an inverted V shape. The upper surface of the crossbeam 7 is in contact with the screen 6, that is, the crossbeam 7 supports the screen 6, improves the load-bearing effect of the screen 6, and prevents the screen 6 from being deformed due to bearing a large weight of sand and gravel; secondly, the crossbeam 7 also provides an installation position for the guide metal mesh 8. After the side of the guide metal mesh 8 is fixed in the installation groove 70, the overall shape of the guide metal mesh 8 is also inverted V shape, and the projection of the guide metal mesh 8 completely covers the lower port 55. The sand and gravel falling from the screen 6 falls on the guide metal mesh 8 and falls on the metal mesh cover 5 along the guide metal mesh 8, preventing the sand and gravel from falling directly from the lower port 55 onto the conveyor belt 42, thereby protecting the conveyor belt 42, extending the service life of the conveyor belt 42, and also reducing the working noise of the machine.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sand and gravel distributor, comprising a frame (1) and a vibrating hopper (2) arranged on the frame (1), wherein a screen (3) is arranged at the upper end of the vibrating hopper (2), and a discharge port (20) is arranged at the lower end of the vibrating hopper (2), characterized in that: The discharge port (20) is rectangular, and a conveyor belt assembly (4) is arranged below the discharge port (20). The conveyor belt assembly (4) comprises an active roller (40) and a driven roller (41) arranged on a frame (1), a conveyor belt (42) sleeved on the active roller (40) and the driven roller (41), and a motor (43) for driving the active roller (40) to rotate. The conveyor belt (42) is arranged along the length direction of the discharge port (20), the width of the conveyor belt (42) is greater than the width of the discharge port (20), the length of the conveyor belt (42) is greater than the length of the discharge port (20), and there is a material drop spacing between the conveyor belt (42) and the discharge port (20).

2. A sand and gravel distributor according to claim 1, characterized in that: The conveyor belt assembly (4) further comprises support plates (44) located on the left and right sides of the conveyor belt (42), the support plates (44) being fixed on the frame (1), and rollers (45) being arranged between the two support plates (44), and a plurality of rollers (45), all of which are arranged at intervals along the length direction of the conveyor belt (42), and both ends of each roller (45) are connected to the corresponding support plates (44), and the outer peripheral surfaces of all the rollers (45) are in contact with the lower surface of the upper part of the conveyor belt (42).

3. A sand and gravel distributor according to claim 2, characterized in that: A rectangular positioning groove (440) is provided at the upper end of the support plate (44), and there are a plurality of the positioning grooves (440). All the positioning grooves (440) are arranged at intervals along the length direction of the conveyor belt (42). Both ends of the roller (45) have mounting shafts (450), and the mounting shafts (450) are inserted into the positioning grooves (440). The mounting shafts (450) have vertical limiting surfaces (451) adapted to the positioning grooves (440) on opposite sides.

4. A sand and gravel distributor according to claim 1 or 2, characterized in that: The conveyor belt assembly (4) further comprises two anti-deviation rollers (46), the two anti-deviation rollers (46) being respectively located on the left and right sides of the middle of the conveyor belt (42), and the anti-deviation rollers (46) being fixed on the frame (1).

5. A sand and gravel distributor according to claim 1, characterized in that: The conveyor belt assembly (4) further comprises a scraper plate (47) located below the lower portion of the conveyor belt (42); the scraper plate (47) is fixed on the frame (1); the scraper plate (47) has a triangular scraper blade (470); the scraper blade (470) is in contact with the lower surface of the lower portion of the conveyor belt (42).

6. A sand and gravel distributor according to claim 1, characterized in that: The vibrating hopper (2) has an inner side wall 1 (21), an inner side wall 2 (22), an inner side wall 3 (23) and an inner side wall 4 (24), and the inner side wall 1 (21), the inner side wall 2 (22), the inner side wall 3 (23) and the inner side wall 4 (24) are all arranged in an inclined manner. A metal mesh cover (5) with a certain elasticity is arranged in the vibrating hopper (2), and the metal mesh cover (5) has a side cover body 1 (50), a side cover body 2 (51), a side cover body 3 (52) and a side cover body 4 (53), and the side cover body 1 (50), the side cover body 2 (51), the side cover body 3 (52) and the side cover body 4 (53) are all arranged in an inclined manner. There is a spacing between the side cover body 1 (50) and the inner wall 1 (21), between the side cover body 2 (51) and the inner wall 2 (22), between the side cover body 3 (52) and the inner wall 3 (23), and between the side cover body 4 (53) and the inner wall 4 (24). The metal mesh cover (5) has an upper port (54) and a lower port (55). The upper end of the metal mesh cover (5) is fixedly connected to the upper end of the vibrating hopper (2), and the lower end of the metal mesh cover (5) is fixedly connected to the lower end of the vibrating hopper (2). The upper end of the vibrating hopper (2) is provided with a screen (6), and the screen (6) is located above the upper port (54).

7. A sand and gravel distributor according to claim 6, characterized in that: Two parallel cross beams (7) are arranged in the vibrating hopper (2), both ends of the cross beams (7) are fixed on the inner wall of the vibrating hopper (2), and the lower surface of each cross beam (7) is provided with an inverted V-shaped mounting groove (70). A guide metal mesh (8) is arranged in the vibrating hopper (2), and both sides of the guide metal mesh (8) are embedded in the corresponding mounting grooves (70) and fixed on the corresponding cross beam (7). The guide metal mesh (8) is located above the lower port (55), and the projection of the guide metal mesh (8) completely covers the lower port (55), and the guide metal mesh (8) is in an inverted V shape.

8. A sand and gravel distributor according to claim 7, characterized in that: Both ends of the crossbeam (7) penetrate the metal mesh cover (5), and the metal mesh cover (5) is fixedly connected to the crossbeam (7).

9. A sand and gravel distributor according to claim 6, characterized in that: The lower end of the vibrating hopper (2) is bent inward to form an inner bending portion (25); the lower end of the metal mesh cover (5) is fixedly connected to the end of the inner bending portion (25); a receiving groove (9) is formed between the inner bending portion (25) and the inner wall of the metal mesh cover (5); a discharge hole (56) connected to the receiving groove (9) is formed on an outer side wall of the lower end of the metal mesh cover (5); and a guide plate (10) arranged in an inclined manner is fixed on an outer side wall of the lower end of the metal mesh cover (5) at a position corresponding to the discharge hole (56).

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