Movable gravel material conveyor for building construction

Abstract

The utility model relates to the field of conveyors, in particular to a movable sand and gravel conveyor for building construction, which comprises a conveyor belt driven by a belt, a frame mounted at the lower end of the conveyor belt, traveling wheels and auxiliary wheels mounted at the lower end of the frame, a dust cover, a cleaning component and a containing tray. A driving machine for driving the walking wheels to rotate is installed on the machine frame, the conveying belt obliquely extends upwards from left to right, a bracket is fixedly installed at the left end of the machine frame, a dust cover is arranged above the left side of the conveying belt, a loader unloads gravel materials on the conveying belt in the dust cover, and a front support is installed between the machine frame and the left end of the conveying belt. A rear support is installed between the machine frame and the right end of the conveying belt, and a material cleaning assembly is installed on the rear support. According to the utility model, the material cleaning assembly is arranged at the terminal position of the right side of the conveyor, so that sand-gravel materials which are embedded or adhered to the conveyor belt can be scraped, the sand-gravel materials are prevented from being conveyed to the lower part of the conveyor along with the conveyor belt to fall off, and the waste of the sand-gravel materials is reduced.

Description

Technical Field

[0001] The utility model relates to the field of conveyors, in particular to a mobile sand and gravel conveyor for building construction. Background Art

[0002] In building construction, sand and gravel are bulk engineering materials and are used in construction projects such as cushion layers, water stabilizers, asphalt, and concrete. The daily consumption is extremely large. The aggregate particle sizes of sand and gravel are different, and they need to be mixed before use to ensure uniform grading. In construction sites or production factories, sand and gravel are conveyed obliquely upward by a belt conveyor and enter the mixer through the feeding port for processing.

[0003] Because the amount of sand and gravel materials entering the site each time is large, the storage yard needs to have enough space. And to avoid the collapse caused by the concentrated stacking of sand and gravel in one place, all sand and gravel materials will be stacked separately according to the actual situation. A forklift or other vehicle will transport the sand and gravel materials to the conveyor at regular time intervals according to the mixing speed of the sand and gravel materials, and then the conveyor will transport them into the mixer. However, sand and gravel are different from ordinary materials. They are characterized by being fine and having different particles. During the entire conveying process, the layer of sand and gravel on the conveyor belt is relatively thick. Due to the gravity extrusion of the upper-layer sand and gravel, the lower-layer sand and gravel will adhere and embed into the surface of the rubber belt of the conveyor belt. As the conveyor belt rotates and transports, it will fall from the lower part of the conveyor belt and cannot enter the mixer, resulting in material loss.

[0004] Therefore, in view of the situation that during the process of transporting sand and gravel by the existing sand and gravel conveyor, the material is easily embedded in the conveyor belt, transferred to the lower surface of the conveyor by the conveyor belt, and cannot enter the mixer normally, resulting in material loss, a structure for cleaning residual sand and gravel at the terminal of the conveyor can be designed to ensure that the sand and gravel embedded in the conveyor belt are taken out to the greatest extent and reduce material loss. Content of the Utility Model

[0005] In order to overcome the problem that sand and gravel are easily embedded in the conveyor belt of the conveyor due to the gravity extrusion of the upper-layer materials and cannot be normally thrown into the mixer at the terminal, resulting in material loss.

[0006] The technical solution of the utility model is as follows: a mobile sand and gravel conveyor for building construction, which includes a conveyor belt driven by a belt, a frame installed at the lower end of the conveyor belt, traveling wheels and auxiliary wheels installed at the lower end of the frame, a dust-proof cover, a material cleaning component and a material receiving tray; a driving machine for driving the traveling wheels to rotate is installed on the frame, the conveyor belt extends obliquely upward from left to right, a bracket is fixedly installed at the left end of the frame, a dust-proof cover is arranged above the left side of the conveyor belt, a loader unloads sand and gravel on the conveyor belt inside the dust-proof cover, a front support is installed between the frame and the left end of the conveyor belt, a rear support is installed between the frame and the right end of the conveyor belt, a material cleaning component is installed on the rear support, the material cleaning component is arranged on the lower side of the right end of the conveyor belt and scrapes the sand and gravel embedded on the conveyor belt into the mixer, a material receiving tray supported on the frame and the rear support is arranged below the conveyor belt, the stone powder on the conveyor belt falls into the material receiving tray and slides out to the right along the slope of the bottom wall of the material receiving tray for collection.

[0007] Preferably, after the loader scoops up the sand and gravel with the bucket, it drives to the left side of the conveyor belt, makes the bucket extend into the dust-proof cover, flips the bucket, and makes the sand and gravel fall on the conveyor belt. The dust generated by unloading is blocked inside the dust-proof cover. The conveyor belt drives from left to right and conveys the sand and gravel to the feeding port of the mixer. When the sand and gravel adhered or embedded on the surface of the conveyor belt pass through the material cleaning mechanism, the material cleaning mechanism scrapes it off and falls into the mixer together with the sand and gravel thrown out by the conveyor belt. At this time, there is still a small amount of stone powder remaining on the conveyor belt. The conveyor belt drives back with the stone powder. When passing through the material receiving tray, the stone powder falls into the material receiving tray and is collected.

[0008] As a preference, two buckle rings are symmetrically installed at the front and rear of the right end of the material receiving tray, and the two buckle rings are buckled and installed on the rear support. Two legs are symmetrically installed at the front and rear of the left end of the material receiving tray. A U-shaped fastener is arranged at the lower end of the leg, and the U-shaped fastener is clamped and fixed on the frame. When installing the material receiving tray, it is inserted into the lower part of the conveyor belt from the middle of the rear support. First, the U-shaped fastener at the lower end of the leg is buckled on the frame from top to bottom, and then the right end of the material receiving tray is rotated downward. Through the opening structure at the edge of the buckle ring, the buckle ring is clamped on the rear support, and the left and right ends of the material receiving tray are supported by the frame and the rear support. And through the limiting effect between the frame and the U-shaped fastener, the front and rear sliding of the material receiving tray is prevented, and the limiting effect between the buckle ring and the rear support prevents the left and right sliding of the material receiving tray.

[0009] As a preference, brush hairs are arranged on the upper surface of the left end of the material receiving tray, and the brush hairs are closely attached to the lower surface of the conveyor belt. A continuous S-shaped heating pipe is installed at the lower end of the material receiving tray. When the conveyor belt rotates back to the left side, the brush hairs wipe the lower surface of the conveyor belt and wipe off the adhered stone powder on it and fall into the material receiving tray. In humid weather or environment, the heating pipe is started to heat the material receiving tray to evaporate the moisture in the stone powder and prevent the stone powder from getting damp and sticking to the material receiving tray.

[0010] Preferably, a U-shaped gantry is installed at the upper end of the bracket, and an auxiliary light is embedded in the bracket. The horizontal width of the gantry is greater than the bucket width of the loader. The gantry serves as a carrying platform for the dust cover. At the same time, the gantry itself has large structural rigidity and strength, and is not easily deformed when equipment such as the loader collides. When the loader is working at night, once it approaches the gantry, the auxiliary light can be used as a reference to calibrate the position of the bucket and align it with the conveyor belt.

[0011] Preferably, a sliding sleeve is fixedly connected to the upper end of the dust cover, and the sliding sleeve is rotatably connected to the horizontal part of the door frame. A push plate is fixedly connected to the left end of the sliding sleeve. Two buffer pads are symmetrically arranged on the left end of the dust cover, and the buffer pads rest against the surface of the bracket. The lower side of the end of the dust cover has an outlet, and sand and gravel are transported to the right along the conveyor belt from the outlet. The dust cover can be flipped up and down through the rotating connection between the horizontal part of the door frame and the sliding sleeve. When the conveyor is not in use, the dust cover can be opened by toggling the push plate to clean the conveyor belt. When the dust cover falls, the elastic deformation of the buffer pad when it hits the bracket plays a buffering role, and there is no need to slowly lower the dust cover.

[0012] Preferably, the material cleaning component includes a crossbeam, a cylinder, a baffle, a rubber pad and a slide plate; the crossbeam is fixedly mounted on the rear bracket and is located below the right end of the conveyor belt, the crossbeam is a hollow structure and a cylinder is mounted on the lower end, the piston rod of the cylinder passes through the crossbeam and extends upward to be fixedly connected to a baffle with a V-shaped structure, the upper end of the baffle is hot-melt connected to a rubber pad with an arc structure, the rubber pad is tightly attached to the lower surface of the right end of the conveyor belt, the side wall of the right end of the baffle extends downward to be provided with a slide plate, the slide plate is perpendicular to the transmission direction of the conveyor belt and blocks the top of the cylinder, according to the particle size of the sand and gravel mixed process The gap between the rubber pad and the lower surface of the conveyor belt can be adjusted by controlling the movement of the baffle cover through the cylinder if necessary, so that very fine particles such as stone powder can pass through, but slightly larger sand and gravel particles cannot pass through. The contact points between the V-shaped baffle cover and the arc-shaped rubber pad and the conveyor belt are in a straight line, which can cover and scrape off the passing sand and gravel while reducing the friction between the conveyor belt and the normal transmission of the conveyor belt. The extended slide design allows the scraped sand and gravel to slide along the slide and fall into the feed port of the mixer below.

[0013] Preferably, the material cleaning assembly includes a motor, a roller and a rubber strip; a motor is installed on the rear bracket, one end of the roller is fixedly connected to the drive shaft of the motor, and the other end is movably connected to the rear bracket, the surface of the roller is covered with a 2 cm thick silicone layer, and arc-shaped raised rubber strips are arranged around the surface of the silicone layer. The motor drives the roller to rotate and the rotation direction is consistent with the transmission direction of the conveyor belt. The sand and gravel adhered and embedded on the conveyor belt first contact the rubber strip after passing through the roller. While being scraped off by the rubber strip, the roller will also generate an impact force on the sand and gravel falling thereon in the same direction as the transmission direction of the conveyor belt, so that the sand and gravel are thrown to the right and fall into the feed port of the mixer.

[0014] Advantages of the present utility model:

[0015] 1. The material cleaning component provided at the right terminal position of the conveyor can scrape the sand and gravel embedded or adhered to the conveyor belt, preventing the sand and gravel from falling back under the conveyor belt with the conveyor belt, and reducing the waste of sand and gravel;

[0016] 2. By providing a dust-proof cover at the left starting end position of the conveyor, the loader can complete the unloading within the dust-proof cover, avoiding a large amount of dust from floating around when the sand and gravel are quickly unloaded;

[0017] 3. The use of the material receiving tray provided under the conveyor belt and the bristles thereon helps to brush out and collect the stone powder remaining on the conveyor belt from the sand and gravel. Firstly, it cleans the conveyor belt, and secondly, the collected stone powder can be used as a raw material for adhesives used in engineering;

[0018] 4. By using the heating pipe under the material receiving tray, it can dry the stone powder when collecting the stone powder, preventing the stone powder from getting damp and sticking to the material receiving tray. Description of the Drawings

[0019] Figure 1 Shown is the first three-dimensional structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0020] Figure 2 Shown is the second three-dimensional structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0021] Figure 3 Shown is the first front structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0022] Figure 4 Shown is the enlarged partial three-dimensional structural schematic diagram at position A of the mobile sand and gravel conveyor for building construction of the present utility model;

[0023] Figure 5 Shown is the enlarged partial three-dimensional structural schematic diagram at position B of the mobile sand and gravel conveyor for building construction of the present utility model;

[0024] Figure 6 Shown is the third three-dimensional structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0025] Figure 7 Shown is the fourth three-dimensional structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0026] Figure 8 Shown is the second front structural schematic diagram of the mobile sand and gravel conveyor for building construction of the present utility model;

[0027] Figure 9 Shown is a partially enlarged three-dimensional structural schematic diagram of the C part of the mobile sand and gravel conveyor for building construction of the present utility model;

[0028] Figure 10 Shown is a partially enlarged three-dimensional structural schematic diagram of the D part of the mobile sand and gravel conveyor for building construction of the present utility model;

[0029] Figure 11 Shown is a three-dimensional structural schematic diagram of the installation of the material receiving tray of the mobile sand and gravel conveyor for building construction of the present utility model;

[0030] Figure 12 Shown is the first three-dimensional structural schematic diagram of the material receiving tray of the mobile sand and gravel conveyor for building construction of the present utility model

[0031] Figure 13 Shown is the second three-dimensional structural schematic diagram of the material receiving tray of the mobile sand and gravel conveyor for building construction of the present utility model;

[0032] Figure 14 Shown is a three-dimensional structural schematic diagram of the installation of the dust-proof cover of the mobile sand and gravel conveyor for building construction of the present utility model;

[0033] Figure 15 Shown is a three-dimensional structural schematic diagram of the dust-proof cover of the mobile sand and gravel conveyor for building construction of the present utility model.

[0034] Explanation of reference numerals: 1, conveyor belt; 2, frame; 3, walking wheel; 4, auxiliary wheel; 5, bracket; 6, dust-proof cover; 8, material receiving tray; 9, front support; 10, rear support; 11, buckle; 12, leg; 13, brush hair; 14, heating pipe; 15, gantry; 16, auxiliary lamp; 17, sliding sleeve; 18, push plate; 19, buffer pad; 701, cross beam; 702, cylinder; 703, retaining cover; 704, rubber pad; 705, sliding plate; 706, roller; 707, rubber strip. Detailed implementation manners

[0035] The present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0036] Please refer to Figures 1-15, the utility model provides a mobile sand and gravel conveyor for building construction, which includes a conveyor belt 1 driven by a belt, a frame 2 installed at the lower end of the conveyor belt 1, traveling wheels 3 and auxiliary wheels 4 installed at the lower end of the frame 2, a dust-proof cover 6, a material cleaning component and a material receiving tray 8; a driving machine for driving the rotation of the traveling wheels 3 is installed on the frame 2, the conveyor belt 1 extends obliquely upward from left to right, a bracket 5 is fixedly installed at the left end of the frame 2, a dust-proof cover 6 is arranged above the left side of the conveyor belt 1, a loader unloads sand and gravel on the conveyor belt 1 inside the dust-proof cover 6, a front support 9 is installed between the frame 2 and the left end of the conveyor belt 1, a rear support 10 is installed between the frame 2 and the right end of the conveyor belt 1, a material cleaning component is installed on the rear support 10, the material cleaning component is arranged on the lower side of the right end of the conveyor belt 1 and scrapes the sand and gravel embedded on the conveyor belt 1 into the mixer, a material receiving tray 8 supported on the frame 2 and the rear support 10 is arranged below the conveyor belt 1, the stone powder on the conveyor belt 1 falls into the material receiving tray 8 and slides out to the right along the slope of the bottom wall of the material receiving tray 8 for collection. After the loader scoops up the sand and gravel with the bucket and drives to the left side of the conveyor belt 1, the bucket is extended into the dust-proof cover 6, the bucket is flipped, and the sand and gravel fall on the conveyor belt 1. The dust generated by unloading is blocked inside the dust-proof cover 6. The conveyor belt 1 drives from left to right and conveys the sand and gravel to the feeding port of the mixer. When the sand and gravel adhered or embedded on the surface of the conveyor belt 1 pass through the material cleaning mechanism, the material cleaning mechanism scrapes it off and falls into the mixer together with the sand and gravel thrown out by the conveyor belt 1. At this time, there is still a small amount of stone powder remaining on the conveyor belt 1. When the conveyor belt 1 drives back with the stone powder and passes through the material receiving tray 8, the stone powder falls into the material receiving tray 8 and is collected.

[0037] Please refer to Figures 1-3 , Figures 6-8 , Figures 11-13, two buckles 11 are symmetrically installed on the right end of the material tray 8, and the two buckles 11 are buckled and installed on the rear bracket 10. Two legs 12 are symmetrically installed on the left end of the material tray 8. A U-shaped fastener is set at the lower end of the leg 12, and the U-shaped fastener is snap-fitted and fixed on the frame 2. When installing the material tray 8, extend it from the middle of the rear bracket 10 to the bottom of the conveyor belt 1, first buckle it on the frame 2 from top to bottom through the U-shaped fastener at the lower end of the leg 12, and then rotate the right end of the material tray 8 downward, and snap the buckle 11 onto the rear bracket 10 through the opening structure on the edge of the buckle 11, and use the frame 2 and the rear bracket 10 to support the left and right ends of the material tray 8, and And the limiting effect between the frame 2 and the U-shaped fastener prevents the material tray 8 from sliding forward and backward, and the limiting effect between the buckle 11 and the rear bracket 10 prevents the material tray 8 from sliding left and right. The upper surface of the left end of the material tray 8 is provided with bristles 13, and the bristles 13 are tightly attached to the lower surface of the conveyor belt 1. A continuous S-shaped heating tube 14 is installed at the lower end of the material tray 8. When the conveyor belt 1 rotates to the left, the bristles 13 wipe the lower surface of the conveyor belt 1, and the stone powder sticking on it is wiped off and falls into the material tray 8. In humid weather or environment, the heating tube 14 is started to heat the material tray 8 to evaporate the moisture in the stone powder to prevent the stone powder from getting damp and sticking to the material tray 8.

[0038] See See Figures 1-3 , Figures 6-8 , Figures 1-10 , Figures 14-15 A U-shaped gantry 15 is installed on the upper end of the bracket 5, and an auxiliary light 16 is embedded in the bracket 5. The horizontal width of the gantry 15 is greater than the bucket width of the loader. The gantry 15 serves as a carrying platform for the dust cover 6. At the same time, its own structural rigidity and strength are relatively large, and it is not easy to deform when the loader and other equipment collide. When the loader is working at night, once it approaches the gantry 15, the auxiliary light 16 can be used as a reference to calibrate the position of the bucket and align it with the conveyor belt 1. A sliding sleeve 17 is fixedly connected to the upper end of the dust cover 6. The sliding sleeve 17 is rotatably connected to the horizontal part of the gantry 15. The left end of the sliding sleeve 17 A push plate 18 is fixedly connected, and two buffer pads 19 are symmetrically arranged on the left end of the dust cover 6. The buffer pad 19 abuts against the surface of the bracket 5. The lower side of the end of the dust cover 6 has a through opening, and sand and gravel are transported to the right along the conveyor belt 1 from the outlet. The dust cover 6 can be turned up and down through the rotation connection between the horizontal part of the door frame 15 and the sliding sleeve 17. When the conveyor is not in use, the dust cover 6 can be opened by toggling the push plate 18 to clean the conveyor belt 1. When the dust cover 6 falls, the elastic deformation of the buffer pad 19 when it hits the bracket 5 plays a buffering role, and there is no need to slowly lower the dust cover 6.

[0039] For example, see Figures 1-5, in this embodiment, the cleaning component includes a cross beam 701, a cylinder 702, a baffle 703, a rubber pad 704 and a slide plate 705; the cross beam 701 is fixedly installed on the rear bracket 10 and is located below the right end of the conveyor belt 1. The cross beam 701 is of a hollow structure and a cylinder 702 is installed at the lower end. The piston rod of the cylinder 702 passes through the cross beam 701 and extends upward to be fixedly connected with a baffle 703 of a V-shaped structure. A rubber pad 704 of an arc structure is heat-melted and connected to the upper end of the baffle 703. The rubber pad 704 is closely attached to the lower surface of the right end of the conveyor belt 1. A slide plate 705 is provided on the lower extension of the right side wall of the baffle 703. The slide plate 705 is perpendicular to the transmission direction of the conveyor belt 1 and shields the cylinder 702. According to the particle size requirements of the sand and gravel mixing process, the gap between the rubber pad 704 and the lower surface of the conveyor belt 1 can be adjusted by controlling the movement of the baffle 703 through the cylinder 702, so that very fine particles such as stone powder can pass through, while larger sand and gravel particles cannot pass through. By using the contact points between the baffle 703 of the V-shaped structure, the rubber pad 704 of the arc structure and the conveyor belt 1 to be on a straight line, it can cover and scrape off the passing sand and gravel, and at the same time reduce the friction with the conveyor belt 1, reduce the impact on the normal transmission of the conveyor belt 1, and extend the design of the slide plate 705, so that the scraped sand and gravel can slide down along the slide plate 705 and fall into the feeding port of the mixer below.

[0040] Embodiment 2, please refer to Figures 6-10 , in this embodiment, the cleaning component includes a motor, a roller 706 and a rubber strip 707; a motor is installed on the rear bracket 10. One end of the roller 706 is fixedly connected to the transmission shaft of the motor, and the other end is movably connected to the rear bracket 10. A silicone layer with a thickness of 2 cm is covered on the surface of the roller 706. Rubber strips 707 with arc-shaped protrusions are arranged in a circle on the surface of the silicone layer. The motor drives the roller 706 to rotate in the same direction as the transmission direction of the conveyor belt 1. The sand and gravel adhered to and embedded in the conveyor belt 1 first come into contact with the rubber strips 707 after passing through the roller 706. While being scraped off by the rubber strips 707, the roller 706 will also generate an impact force in the same direction as the transmission direction of the conveyor belt 1 on the sand and gravel falling on it, so that the sand and gravel are thrown to the right and fall into the feeding port of the mixer.

[0041] Through the above steps, the cleaning component provided at the right end position of the conveyor can scrape off the sand and gravel embedded in or adhered to the conveyor belt 1, avoid the sand and gravel from being conveyed back to the lower part of the conveyor by the conveyor belt 1 and falling, reduce the waste of sand and gravel, and solve the problem that the sand and gravel are easily embedded in the conveyor belt 1 of the conveyor due to the gravity extrusion of the upper layer of materials and cannot be normally thrown into the mixer when conveyed to the terminal, resulting in material loss.

Claims

1. A mobile sand and gravel conveyor for building construction, comprising a conveyor belt (1) driven by a belt, a frame (2) installed at the lower end of the conveyor belt (1), a traveling wheel (3) and an auxiliary wheel (4) installed at the lower end of the frame (2); characterized in that: It also includes a dust cover (6), a material cleaning component and a material receiving tray (8); a driving machine for driving the traveling wheels (3) to rotate is installed on the frame (2), the conveyor belt (1) extends obliquely upward from left to right, a bracket (5) is fixedly installed at the left end of the frame (2), a dust cover (6) is arranged above the left side of the conveyor belt (1), a loader unloads sand and gravel materials on the conveyor belt (1) within the dust cover (6), a front support (9) is installed between the frame (2) and the left end of the conveyor belt (1), a rear support (10) is installed between the frame (2) and the right end of the conveyor belt (1), a material cleaning component is installed on the rear support (10), the material cleaning component is arranged on the lower side of the right end of the conveyor belt (1) and scrapes the sand and gravel materials embedded on the conveyor belt (1) into the mixer, a material receiving tray (8) supported on the frame (2) and the rear support (10) is arranged below the conveyor belt (1), and the stone powder on the conveyor belt (1) falls into the material receiving tray (8) and slides out to the right along the slope of the bottom wall of the material receiving tray (8) for collection.

2. The mobile sand and gravel conveyor for construction according to claim 1, wherein: Two buckle rings (11) are symmetrically installed at the front and rear of the right end of the material receiving tray (8), the two buckle rings (11) are snap-fitted on the rear support (10), two legs (12) are symmetrically installed at the front and rear of the left end of the material receiving tray (8), and U-shaped fasteners are arranged at the lower ends of the legs (12), and the U-shaped fasteners are snap-fitted and fixed on the frame (2).

3. The mobile sand and gravel conveyor for construction according to claim 2, characterized in that: Brush hairs (13) are arranged on the upper surface of the left end of the material receiving tray (8), the brush hairs (13) are closely attached to the lower surface of the conveyor belt (1), and a continuous S-shaped heating pipe (14) is installed at the lower end of the material receiving tray (8).

4. The mobile sand and gravel conveyor for construction according to claim 1, characterized in that: A U-shaped gantry (15) is installed at the upper end of the bracket (5), an auxiliary lamp (16) is embedded and installed on the bracket (5), and the width of the horizontal part of the gantry (15) is greater than the width of the bucket of the loader.

5. The mobile sand and gravel conveyor for construction according to claim 4, characterized in that: A sliding sleeve (17) is fixedly connected to the upper end of the dust cover (6), the sliding sleeve (17) is rotatably connected to the horizontal part of the gantry (15), a push plate (18) is fixedly connected to the left end of the sliding sleeve (17), and two buffer pads (19) are symmetrically arranged at the front and rear of the left end of the dust cover (6), and the buffer pads (19) abut against the surface of the bracket (5).

6. The mobile sand and gravel conveyor for construction according to claim 1, characterized in that: The material cleaning component includes a cross beam (701), a cylinder (702), a baffle (703), a rubber pad (704) and a sliding plate (705); the cross beam (701) is fixedly installed on the rear support (10) and is located below the right end of the conveyor belt (1), the cross beam (701) is of a hollow structure and a cylinder (702) is installed at the lower end thereof, the piston rod of the cylinder (702) passes through the cross beam (701) and extends upward to be fixedly connected with a V-shaped baffle (703), an arc-shaped rubber pad (704) is heat-melted and connected to the upper end of the baffle (703), the rubber pad (704) is closely attached to the lower surface of the right end of the conveyor belt (1), a sliding plate (705) is arranged on the downward extension of the right side wall of the baffle (703), and the sliding plate (705) is perpendicular to the transmission direction of the conveyor belt (1) and shields above the cylinder (702).

7. The mobile sand and gravel conveyor for construction according to claim 1, characterized in that: The material cleaning component includes a motor, a roller (706) and a rubber strip (707); the motor is installed on the rear bracket (10), one end of the roller (706) is fixedly connected to the transmission shaft of the motor, and the other end is movably connected to the rear bracket (10). A silica gel layer with a thickness of 2 cm is covered on the surface of the roller (706), and the rubber strip (707) with arc-shaped protrusions is arranged around the surface of the silica gel layer in a circle.

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