Sand and gravel separation and drying device

Abstract

The invention discloses a sand and gravel separation and drying device, which relates to the field of sand and gravel separation technology, and comprises a frame; a plurality of drying slots are provided, and the plurality of drying slots are arranged at intervals in parallel at the top of the frame; a supporting plate assembly corresponds to the position of the drying slots; a pushing cylinder is arranged on the side wall of the frame; a toggle claw assembly is arranged on the piston rod of the pushing cylinder; a discharge port is arranged at the bottom of the frame; the supporting plate assembly comprises a lifting cylinder arranged on the top of the frame, a plurality of connecting rods corresponding to the drying slots are arranged on the piston rod of the lifting cylinder, and a left opening and closing plate and a right opening and closing plate are symmetrically arranged on opposite sides of the connecting rod, and an end of the left opening and closing plate away from the connecting rod and an end of the right opening and closing plate away from the connecting rod are respectively rotatably arranged on two opposite inner walls of the drying slot. The invention has the advantages of reducing or avoiding the occurrence of agglomerated sand and improving the effect of sand and gravel separation.

Description

Technical Field

[0001] The invention relates to the technical field of sand and gravel separation, and in particular to a sand and gravel separation and drying device. Background Art

[0002] On construction sites, a lot of sand and gravel are often needed. Since sand and stone have different uses, they are usually separated by sieves and then used separately. Since the sand and stone raw materials contain a lot of water, the sand is easy to clump when it meets water, which is not conducive to the drying of the inside and the separation of sand and stone. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the technical problem to be solved by the present invention is to provide a sand and gravel separation and drying device which can reduce or avoid the occurrence of agglomeration of sand and improve the sand and gravel separation effect.

[0004] In order to solve the above technical problems, the present invention provides a sand and gravel separation and drying device, comprising:

[0005] frame;

[0006] A drying tank, wherein a plurality of drying tanks are provided, and the plurality of drying tanks are arranged in parallel and at intervals on the top of the frame;

[0007] A support plate assembly, the support plate assembly corresponds to the position of the drying slot, and the support plate assembly is movably arranged in the drying slot at the corresponding position;

[0008] A pushing cylinder is arranged on a side wall of the frame;

[0009] A toggle claw assembly, which is arranged on the piston rod of the push cylinder, and the toggle claw assembly corresponds to the position of the drying tank up and down;

[0010] A discharge port is arranged at the bottom of the frame and is connected to the drying tank;

[0011] Among them, the supporting plate assembly includes a lifting cylinder arranged on the top of the frame, and a plurality of connecting rods corresponding to the drying grooves are arranged on the piston rod of the lifting cylinder. A left opening and closing plate and a right opening and closing plate are symmetrically arranged on the opposite sides of the connecting rod. The end of the left opening and closing plate away from the connecting rod and the end of the right opening and closing plate away from the connecting rod are respectively rotatably arranged on the two opposite inner walls of the drying groove.

[0012] Preferably, the length direction of the connecting rod is the same as the length direction of the drying tank, a plurality of semicircular blocking columns are arranged on the bottom surface of the connecting rod along the length direction, the outer side of the semicircular blocking column is wound with a heating wire, the arc-shaped end of the semicircular blocking column is connected to the bottom surface of the connecting rod, the plane end of the semicircular blocking column is connected to the arc-shaped spring plate through the vertical plate, the arc-shaped end opening of the arc-shaped spring plate faces the plane end direction of the semicircular blocking column, and the side wall of the left opening and closing plate close to the right opening and closing plate is provided with a Plate groove one, and plate groove two matched with the arc-shaped spring plate are arranged on the side wall of the right opening and closing plate near the left opening and closing plate, and the two ends of the arc-shaped opening of the arc-shaped spring plate are movably arranged in plate groove one and plate groove two respectively, and the lifting cylinder drives the connecting rod, the semicircular blocking column, the vertical plate and the arc-shaped spring plate to move away from the left opening and closing plate and the right opening and closing plate at the same time, so that the two ends of the arc-shaped opening of the arc-shaped spring plate can be moved out from plate groove one and plate groove two respectively, so that the sand and gravel raw materials on the arc-shaped spring plate fall into the discharge port.

[0013] Preferably, one end of the left opening and closing plate away from the connecting rod and one end of the right opening and closing plate away from the connecting rod are respectively rotatably arranged on two opposite inner walls of the drying trough through a rotating motor, so as to drive the left opening and closing plate and the right opening and closing plate to close, so that the sand and gravel raw materials can stay on the left opening and closing plate and the right opening and closing plate; or drive the left opening and closing plate and the right opening and closing plate to separate, so that the sand and gravel raw materials can fall from the left opening and closing plate and the right opening and closing plate to the discharge port.

[0014] Preferably, the shift claw assembly comprises:

[0015] A feeding box, which is arranged on the piston rod of the push cylinder, and the top surface of the feeding box is open;

[0016] A material dividing trough, wherein a plurality of material dividing troughs are provided, and the plurality of material dividing troughs are arranged on the bottom surface of the feeding box, and the plurality of material dividing troughs correspond to the plurality of drying troughs one by one;

[0017] There are multiple scrapers, and the multiple scrapers correspond to the multiple drying slots one by one. The scrapers are movably arranged in the drying slots at corresponding positions. The sand and gravel raw materials are respectively put into each drying slot from the feeding box through the dividing trough. Under the action of the scrapers, the sand and gravel raw materials in the drying slots can be evenly distributed, which is beneficial to the drying of the sand and gravel raw materials.

[0018] Preferably, the scraper comprises:

[0019] An inverted U-shaped fixed upper plate, which is fixedly arranged on the bottom surface of the charging box;

[0020] There are two movable scrapers, and the two movable scrapers are movably connected to the two ends of the U-shaped opening of the inverted U-shaped fixed upper plate through return springs. The movable scraper is located in the drying trough, and the end of the movable scraper away from the inverted U-shaped fixed upper plate is in contact with the arc end of the semicircular baffle column. The movable scraper can make the sand and gravel raw materials in the drying trough evenly distributed, which is beneficial to the drying of the sand and gravel raw materials.

[0021] Preferably, the connecting rod and the semicircular baffle column are arranged in sequence from top to bottom in the drying trough, and the connecting rod movably passes through the U-shaped opening of the inverted U-shaped fixed upper plate, so that when the lifting cylinder drives the connecting rod to move away from the left opening and closing plate and the right opening and closing plate, the connecting rod can move in the U-shaped opening of the inverted U-shaped fixed upper plate, thereby avoiding interference between the connecting rod and the movable scraper when moving.

[0022] Preferably, a pressure plate 1 is vertically arranged on the left opening and closing plate, and a pressure plate 2 is vertically arranged on the right opening and closing plate, so that when the left opening and closing plate and the right opening and closing plate are flipped, the pressure plate 1 and the pressure plate 2 can be respectively squeezed with the two ends of the arc-shaped opening of the arc-shaped spring plate, thereby facilitating the falling of the sand and gravel raw materials stored on the pressure plate 1, the pressure plate 2 and the arc-shaped spring plate.

[0023] Preferably, the width of the arc-shaped opening of the arc-shaped spring plate is greater than the distance between the first pressing plate and the second pressing plate, so that both ends of the arc-shaped opening of the arc-shaped spring plate can be inserted into the first plate groove and the second plate groove respectively.

[0024] The beneficial effects of the present invention are as follows: 1. The present invention adds sand and gravel raw materials to the support plate assembly in the drying tank, and under the action of the prying claw assembly, reduces or avoids the occurrence of agglomerated sand, thereby separating the sand and gravel in the sand and gravel raw materials and improving the drying efficiency.

[0025] 2. The setting of the scraper enables the sand and gravel raw materials to be evenly distributed when they are fed into the drying trough; at the same time, the agglomerated sand in the sand and gravel raw materials can be broken up, thereby improving the efficiency of subsequent drying. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0028] Figure 2 for Figure 1 A schematic diagram of the enlarged structure in the middle.

[0029] Figure 3 A schematic structural diagram of a support plate assembly of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0030] Figure 4 A structural schematic diagram of a sand and gravel separation and drying device provided in an embodiment of the present invention in which both ends of an arc-shaped opening of an arc-shaped spring plate are respectively connected to a left opening and closing plate and a right opening and closing plate.

[0031] Figure 5 A schematic diagram of the arc-shaped spring plate structure of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0032] Figure 6 A schematic diagram of the left opening and closing plate structure of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0033] Figure 7 A schematic diagram of the right opening and closing plate structure of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0034] Figure 8 A schematic diagram of a scraper structure of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0035] Fig. 9 A schematic diagram of the position of a distribution trough of a sand and gravel separation and drying device provided in an embodiment of the present invention.

[0036] Explanation of the reference numerals in the accompanying drawings: 1. Frame; 2. Drying trough; 3. Support plate assembly; 31. Lifting cylinder; 32. Connecting rod; 321. Semicircular baffle column; 322. Vertical plate; 323. Arc-shaped spring plate; 33. Left opening and closing plate; 331. Plate slot one; 332. Pressing plate one; 34. Right opening and closing plate; 341. Plate slot two; 342. Pressing plate two; 4. Pushing cylinder; 5. Paddle claw assembly; 51. Feeding box; 52. Distributing trough; 53. Scraper; 531. Inverted U-shaped fixed upper plate; 532. Movable scraper; 533. Return spring; 6. Discharge port. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] like Figure 1 , Figures 3 to 7As shown, the present invention provides a sand and gravel separation and drying device, comprising a frame 1; two drying slots 2 are provided, and the two drying slots 2 are arranged in parallel and spaced apart at the top of the frame 1; a supporting plate assembly 3, the supporting plate assembly 3 corresponds to the position of the drying slots 2, and the supporting plate assembly 3 is movably arranged in the drying slots 2 at the corresponding positions; a pushing cylinder 4 is arranged on the side wall of the frame 1; a toggle claw assembly 5 is arranged on the piston rod of the pushing cylinder 4, and the toggle claw assembly 5 corresponds to the position of the drying slot 2 up and down; The material port 6 is arranged at the bottom of the frame 1, and the material outlet 6 is communicated with the drying trough 2; the supporting plate assembly 3 includes a lifting cylinder 31 arranged at the top of the frame 1, and two connecting rods 32 corresponding to the drying trough 2 are arranged on the piston rod of the lifting cylinder 31, and the left opening and closing plate 33 and the right opening and closing plate 34 are symmetrically arranged on the opposite sides of the connecting rod 32, and the end of the left opening and closing plate 33 away from the connecting rod 32 and the end of the right opening and closing plate 34 away from the connecting rod 32 are respectively rotatably arranged on the two opposite inner walls of the drying trough 2.

[0040] Adding sand and gravel raw materials to the supporting plate assembly 3 in each drying trough 2, and pushing the cylinder 4 to push the moving claw assembly 5 to move, the sand and gravel raw materials in the drying trough 2 can be evenly distributed on the supporting plate assembly 3, that is, before adding the sand and gravel raw materials into the drying trough 2, start the lifting cylinder 31 to drive the connecting rod 32 to adjust the position up and down, and at the same time make the end of the left opening and closing plate 33 close to the connecting rod 32 and the end of the right opening and closing plate 34 close to the connecting rod 32 close, so that the sand and gravel raw materials can fall evenly on the left opening and closing plate 33 and the right opening and closing plate 34.

[0041] Embodiment 2

[0042] Based on the first embodiment, Figure 1 , Figures 3 to 7 As shown, the length direction of the connecting rod 32 is the same as the length direction of the drying tank 2. A plurality of semicircular blocking columns 321 are arranged on the bottom surface of the connecting rod 32 along the length direction. The outside of the semicircular blocking columns 321 is wrapped with electric heating wires. The arc ends of the semicircular blocking columns 321 are connected to the bottom surface of the connecting rod 32. The plane ends of the semicircular blocking columns 321 are connected to arc spring plates 323 through vertical plates 322. The arc end opening of the arc spring plates 323 faces the plane end direction of the semicircular blocking columns 321. The side wall of the left opening and closing plate 33 close to the right opening and closing plate 34 is provided with a curved spring plate 323. A matching plate groove 1 331 is provided on the side wall of the right opening and closing plate 34 close to the left opening and closing plate 33, and a plate groove 2 341 matching the arc-shaped spring plate 323 is provided. The two ends of the arc-shaped opening of the arc-shaped spring plate 323 are respectively movably arranged in the plate groove 1 331 and the plate groove 2 341; one end of the left opening and closing plate 33 away from the connecting rod 32 and one end of the right opening and closing plate 34 away from the connecting rod 32 are respectively rotatably arranged on two opposite inner walls of the drying tank 2 by a rotating motor; a pressing plate 1 332 is vertically arranged on the left opening and closing plate 33, and a pressing plate 2 342 is vertically arranged on the right opening and closing plate 34.

[0043] Two rotating motors are provided, and the two rotating motors are embedded in the inner wall of the drying tank 2, and the two rotating motors respectively drive the left opening and closing plate 33 and the right opening and closing plate 34 to realize flipping.

[0044] Before adding the sand and stone raw materials into each drying slot 2, the rotating motor is started to drive the left opening and closing plate 33 and the right opening and closing plate 34 to flip, so that the left opening and closing plate 33 and the right opening and closing plate 34 are flipped in the direction close to the arc-shaped spring plate 323, so that the two ends of the arc-shaped opening of the arc-shaped spring plate 323 are respectively inserted into the plate groove 1 331 on the left opening and closing plate 33 and the plate groove 2 341 on the right opening and closing plate 34; then the pushing cylinder 4 is started to push the toggle claw assembly 5 to move (the toggle claw assembly 5 can move along the drying slot 2 The sand and gravel raw materials can be unloaded along the length direction of the drying trough 2. At this time, the sand and gravel raw materials can fall onto the left opening and closing plate 33 and the right opening and closing plate 34 until the sand and gravel raw materials accumulated in the drying trough 2 cover the semicircular blocking column 321. While unloading, the claw assembly 5 can be moved to make the sand and gravel raw materials dropped into the drying trough 2 evenly distributed, and the agglomerated sand can also be broken up. This is conducive to drying the sand and gravel raw materials through the electric heating wire wrapped around the outside of the semicircular blocking column 321.

[0045] When the drying is finished, the lifting cylinder 31 is started to drive the connecting rod 32, the semicircular blocking column 321, the vertical plate 322 and the arc spring plate 323 to move away from the drying tank 2 at the same time, so that the two ends of the arc opening of the arc spring plate 323 can be moved out of the plate groove 1 331 and the plate groove 2 341 respectively; at the same time, the rotating motor is started to drive the left opening and closing plate 33 and the right opening and closing plate 34 to turn over (that is, the plate groove 1 331 on the left opening and closing plate 33 and the plate groove 2 341 on the right opening and closing plate 34 are turned 90 degrees toward the direction of the discharge port 6). The width is greater than the distance between pressing plate 1 332 and pressing plate 2 342, so the two ends of the arc-shaped opening of the arc-shaped spring plate 323 can respectively rest on pressing plate 1 332 and pressing plate 2 342. At this time, the arc-shaped spring plate 323 is deformed, that is, the arc-shaped opening of the arc-shaped spring plate 323 is toward the discharge port 6, so that the sand and gravel raw materials on the arc-shaped spring plate 323 can slide into the discharge port 6 (the two ends of the arc-shaped opening of the arc-shaped spring plate 323 can be a wavy structure to facilitate the sand and gravel raw materials to slide into the discharge port 6); at the same time, the sand and gravel raw materials on the left opening and closing plate 33 and the right opening and closing plate 34 can fall into the discharge port 6.

[0046] The arc-shaped spring plate 323, the left opening and closing plate 33 and the right opening and closing plate 34 can all be sieve-like structures, which is convenient for controlling the water of the sand and gravel raw materials on the left opening and closing plate 33 and the right opening and closing plate 34, or allowing the sand in the sand and gravel raw materials on the left opening and closing plate 33 and the right opening and closing plate 34 to enter the discharge port 6 through the left opening and closing plate 33 and the right opening and closing plate 34 for collection, so as to separate the sand and gravel in the sand and gravel raw materials (that is, the sand that can pass through the left opening and closing plate 33 and the right opening and closing plate 34 enters the discharge port 6; the gravel that cannot pass through the left opening and closing plate 33 and the right opening and closing plate 34 remains on the left opening and closing plate 33 and the right opening and closing plate 34 At the same time, a trough for receiving sand corresponding to the position of the left opening and closing plate 33 and the right opening and closing plate 34 is movably arranged in the discharge port 6; when the water control is completed, the trough for receiving sand can be removed (the trough contains sand and water at this time), and then the left opening and closing plate 33 and the right opening and closing plate 34 are rotated, so that the stones on the left opening and closing plate 33 and the right opening and closing plate 34 are collected at the discharge port 6 at the bottom of the frame 1 (at this time, the stones on the left opening and closing plate 33 and the right opening and closing plate 34 can be dried under the action of the electric heating wire wrapped around the outside of the semicircular blocking column 321).

[0047] Embodiment 3

[0048] Based on the first embodiment, Figures 1 to 3 , Figures 8 to 9 As shown, the toggle claw assembly 5 includes a feeding box 51, which is arranged on the piston rod of the push cylinder 4, and the top surface of the feeding box 51 is open; there are two material distribution grooves 52, which are arranged on the bottom surface of the feeding box 51, and the two material distribution grooves 52 correspond to the two drying grooves 2 one by one; there are two scrapers 53, which correspond to the two drying grooves 2 one by one, and the scrapers 53 are movably arranged in the drying grooves 2 at corresponding positions; the scraper 53 includes an inverted U-shaped fixed upper plate 531, and the inverted U-shaped fixed upper plate 531 is fixedly arranged On the bottom surface of the feeding box 51; there are two movable scrapers 532, and the two movable scrapers 532 are movably connected to the two ends of the U-shaped opening of the inverted U-shaped fixed upper plate 531 through return springs 533, the movable scraper 532 is located in the drying trough 2, and the end of the movable scraper 532 away from the inverted U-shaped fixed upper plate 531 is in contact with the arc end of the semicircular blocking column 321; the connecting rod 32 and the semicircular blocking column 321 are arranged in the drying trough 2 from top to bottom, and the connecting rod 32 movably passes through the U-shaped opening of the inverted U-shaped fixed upper plate 531.

[0049] The pushing cylinder 4 is started to push the feeding box 51 to move along the length direction of the drying trough 2, and the sand and stone raw materials can fall from the two material distribution grooves 52 on the bottom of the feeding box 51 into the two drying troughs 2 at the corresponding positions. At the same time, under the push of the pushing cylinder 4, the sand and stone raw materials falling into the drying trough 2 can be scraped flat under the action of the movable scraper 532, thereby preventing the sand and stone raw materials from being unevenly accumulated in the drying trough 2; when the movable scraper 532 is moved to the position of the semicircular blocking column 321 under the push of the pushing cylinder 4, it can be The circular blocking column 321 compresses the return spring 533, and the movable scraper 532 shrinks to the inside of the two ends of the U-shaped opening of the inverted U-shaped fixed upper plate 531; when the movable scraper 532 is staggered with the position of the semicircular blocking column 321, the movable scraper 532 pops out from the two ends of the U-shaped opening of the inverted U-shaped fixed upper plate 531 under the action of the return spring 533 to reset, and can continue to scrape the sand and gravel raw materials in the drying trough 2 flat, which is conducive to the electric heating wire outside the semicircular blocking column 321 to dry the sand and gravel raw materials evenly.

[0050] A spiral discharging device may also be provided in the material distribution trough 52, so that the sand and gravel raw materials in the feeding box 51 can be evenly dropped into the drying trough 2, which is beneficial to the separation and drying of sand and gravel.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sand and gravel separation and drying device, characterized in that: include: Rack(1); A drying tank (2), wherein a plurality of drying tanks (2) are provided, and the plurality of drying tanks (2) are arranged in parallel and at intervals on the top of the frame (1); A support plate assembly (3), the support plate assembly (3) corresponds to the position of the drying slot (2), and the support plate assembly (3) is movably arranged in the drying slot (2) at the corresponding position; A pushing cylinder (4), wherein the pushing cylinder (4) is arranged on a side wall of the frame (1); A toggle claw assembly (5), the toggle claw assembly (5) being arranged on a piston rod of the push cylinder (4), and the toggle claw assembly (5) and the drying tank (2) being located vertically corresponding to each other; A discharge port (6), the discharge port (6) being arranged at the bottom of the frame (1), and the discharge port (6) being in communication with the drying tank (2); The support plate assembly (3) comprises a lifting cylinder (31) arranged on the top of the frame (1); a plurality of connecting rods (32) corresponding to the drying troughs (2) are arranged on the piston rod of the lifting cylinder (31); a left opening and closing plate (33) and a right opening and closing plate (34) are symmetrically arranged on opposite sides of the connecting rod (32); an end of the left opening and closing plate (33) away from the connecting rod (32) and an end of the right opening and closing plate (34) away from the connecting rod (32) are rotatably arranged on two opposite inner walls of the drying trough (2); The length direction of the connecting rod (32) is the same as the length direction of the drying trough (2); a plurality of semicircular blocking columns (321) are arranged on the bottom surface of the connecting rod (32) along the length direction; the outside of the semicircular blocking columns (321) is wound with electric heating wires; the arc-shaped ends of the semicircular blocking columns (321) are connected to the bottom surface of the connecting rod (32); the plane ends of the semicircular blocking columns (321) are connected to arc-shaped spring plates (323) via vertical plates (322); the arc-shaped ends of the arc-shaped spring plates (323) are open A plate groove 1 (331) adapted to the arc-shaped spring plate (323) is provided on a side wall of the left opening and closing plate (33) close to the right opening and closing plate (34) toward the plane end of the semicircular blocking column (321), and a plate groove 2 (341) adapted to the arc-shaped spring plate (323) is provided on a side wall of the right opening and closing plate (34) close to the left opening and closing plate (33). Both ends of the arc-shaped opening of the arc-shaped spring plate (323) are movably arranged in the plate groove 1 (331) and the plate groove 2 (341), respectively.

2. A sand and gravel separation and drying device as claimed in claim 1, characterized in that: One end of the left opening and closing plate (33) away from the connecting rod (32) and one end of the right opening and closing plate (34) away from the connecting rod (32) are both rotatably arranged on two opposite inner walls of the drying tank (2) by means of a rotating motor.

3. The sand and gravel separation and drying device according to claim 1, characterized in that: The toggle claw assembly (5) comprises: A feeding box (51), the feeding box (51) is arranged on the piston rod of the pushing cylinder (4), and the top surface of the feeding box (51) is open; A material distribution trough (52), wherein a plurality of the material distribution troughs (52) are provided, the plurality of material distribution troughs (52) are provided on the bottom surface of the feeding box (51), and the plurality of material distribution troughs (52) correspond one-to-one to the plurality of drying troughs (2); A scraper (53), wherein a plurality of scrapers (53) are provided, the plurality of scrapers (53) correspond one-to-one to the plurality of drying slots (2), and the scrapers (53) are movably provided in the drying slots (2) at corresponding positions.

4. A sand and gravel separation and drying device as claimed in claim 3, characterized in that: The scraper (53) comprises: An inverted U-shaped fixed upper plate (531), the inverted U-shaped fixed upper plate (531) being fixedly arranged on the bottom surface of the charging box (51); A movable scraper (532), wherein two movable scrapers (532) are provided, and the two movable scrapers (532) are respectively movably connected to the two ends of the U-shaped opening of the inverted U-shaped fixed upper plate (531) through a return spring (533), the movable scraper (532) is located in the drying trough (2), and one end of the movable scraper (532) away from the inverted U-shaped fixed upper plate (531) contacts the arc-shaped end of the semicircular blocking column (321).

5. A sand and gravel separation and drying device as claimed in claim 4, characterized in that: The connecting rod (32) and the semicircular blocking column (321) are arranged in sequence from top to bottom in the drying trough (2), and the connecting rod (32) movably passes through the U-shaped opening of the inverted U-shaped fixed upper plate (531).

6. The sand and gravel separation and drying device according to claim 2, characterized in that: A first pressing plate (332) is vertically arranged on the left opening and closing plate (33), and a second pressing plate (342) is vertically arranged on the right opening and closing plate (34).

7. A sand and gravel separation and drying device as claimed in claim 6, characterized in that: The width of the arc-shaped opening of the arc-shaped spring plate (323) is greater than the distance between the first pressing plate (332) and the second pressing plate (342).

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