阅读说明：本技术 一种精密铸造集成式浮砂设备 (Precision casting integrated form floats sand equipment ) 是由 李勇兵 张跃华 刘超 熊亮 于 2020-06-20 设计创作，主要内容包括：本发明提出了一种精密铸造集成式浮砂设备,包括浮砂桶、提升机和筛砂箱,所述筛砂箱还包括箱体、第一筛网支架、筛网和废砂管,箱体的顶部设有进砂口,箱体内位于进砂口的下方倾斜固定安装有第一筛网支架,进砂口沿竖直方向向下的投影位于第一筛网支架内,第一筛网支架的顶部和两侧均与箱体内壁紧密连接,箱体下端与浮砂桶内侧相互连通,第一筛网支架靠近箱体进砂口一面的下端与箱体内壁形成的开口通过废砂管与箱体外部相互连通,第一筛网支架上安装有筛网,第一筛网支架的下表面与浮砂桶内侧相互连通,浮砂桶的底部与提升机底部的进料口选择性连通,提升机顶部的出料口与筛砂箱顶部的进砂口相互连通,本发明替代人工筛砂,提升了生产效率。(The invention provides precision casting integrated floating sand equipment, which comprises a floating sand barrel, a lifter and a sand sieving box, wherein the sand sieving box also comprises a box body, a first screen bracket, a screen and a waste sand pipe, the top of the box body is provided with a sand inlet, the first screen bracket is obliquely and fixedly arranged below the sand inlet in the box body, the downward projection of the sand inlet along the vertical direction is positioned in the first screen bracket, the top and two sides of the first screen bracket are tightly connected with the inner wall of the box body, the lower end of the box body is mutually communicated with the inner side of the floating sand barrel, the lower end of the first screen bracket, which is close to the sand inlet of the box body, is mutually communicated with the outer part of the box body through the waste sand pipe, the screen is arranged on the first screen bracket, the lower surface of the first screen bracket is mutually communicated with the inner side of the floating sand barrel, the bottom of the floating sand barrel is selectively communicated with a feed inlet at the bottom of the lifter, a discharge outlet at the top of the, the invention replaces manual sand screening, and improves the production efficiency.)

1. The precise casting integrated floating sand equipment is characterized by comprising a floating sand barrel (1), a lifting machine (2) and a sand sieving box (3), wherein the sand sieving box (3) further comprises a box body (31), a first screen support (32), a screen (33) and a waste sand pipe (34), a sand inlet is formed in the top of the box body (31), the first screen support (32) is obliquely and fixedly installed below the sand inlet in the box body (31), the downward projection of the sand inlet along the vertical direction is located in the first screen support (32), the top and two sides of the first screen support (32) are tightly connected with the inner wall of the box body (31), the lower end of the box body (31) is mutually communicated with the inner side of the floating sand barrel (1), the lower end of the first screen support (32) close to the sand inlet of the box body (31) is mutually communicated with the outer part of the box body (31) through the waste sand pipe (34) with an opening formed in the inner wall of the box body (31), install screen cloth (33) on first screen cloth support (32), the lower surface of first screen cloth support (32) with float sand bucket (1) inboard intercommunication each other, float the feed inlet selective intercommunication of the bottom of sand bucket (1) and lifting machine (2) bottom, the discharge gate at lifting machine (2) top and the sand inlet intercommunication at sieve sand box (3) top.

2. The precision casting integrated floating sand device according to claim 1, further comprising a first brush roller (4), wherein the first brush roller (4) is rotatably installed in the box body (31) and is arranged in parallel on the upper surface of the first screen support (32), and when the first brush roller (4) rotates, the brush thereof periodically sweeps across the surface of the screen (33) of the first screen support (32).

3. The precision casting integrated floating sand device as claimed in claim 1, wherein the sand sieving box (3) further comprises a first baffle plate (35) and a second screen bracket (36), the bottom of the first screen bracket (32) is fixedly connected with the first baffle plate (35), the upward projection of the first baffle plate (35) along the vertical direction is positioned in the first screen bracket (32), two sides of the first baffle plate (35) are tightly connected with the inner wall of the box body (31), one side of the first baffle plate (35) far away from the first screen bracket (32) is provided with the second screen bracket (36), the top and two sides of the second screen bracket (36) are tightly connected with the inner wall of the box body (31), a channel is formed among the second screen bracket (36), the first baffle plate (35) and the inner wall of the box body (31), the bottom opening of the channel is communicated with the outer side of the box body through the waste sand pipe (34), the screen (33) is fixedly installed on the second screen support (36), and the lower surface of the second screen support (36) is communicated with the inner side of the floating sand barrel (1).

4. The precision casting integrated floating sand device according to claim 3, further comprising a second brush roller (5), wherein the second brush roller (5) is rotatably installed in the box body (31), the second brush roller (5) is located between the second screen support (36) and the first baffle (35), and the second brush roller (5) and the second screen support (36) are parallel to each other, and when the second brush roller (5) rotates, the brush thereof periodically sweeps over the surface of the screen (33) of the second screen support (36).

5. The precision casting integrated floating sand apparatus according to claim 3, wherein the sand sieving box (3) further comprises a second baffle plate (37) and a third screen support (38), the bottom of the second screen support (36) is fixedly connected with the second baffle plate (37), the upward projection of the second baffle plate (37) along the vertical direction is positioned in the second screen support (36), two sides of the second baffle plate (37) are tightly connected with the inner wall of the box body (31), one side of the second baffle plate (37) far away from the second screen support (36) is provided with the third screen support (38), the top of the third screen support (38) is tightly connected with the bottom of the first baffle plate (35), two sides of the third screen support (38) are tightly connected with the inner wall of the box body (31), a channel is formed among the third screen support (38), the second baffle plate (37) and the inner wall of the box body (31), and the bottom opening of the channel is communicated with the outer side of the box body (31) through the waste sand pipe (34), the third screen support (38) is fixedly provided with a screen (33), and the lower surface of the third screen support (38) is communicated with the inner side of the floating sand barrel (1).

6. The precision casting integrated floating sand device according to claim 5, further comprising a third brush roller (6), wherein the third brush roller (6) is rotatably installed in the box body (31), the third brush roller (6) is located between the third screen support (38) and the second baffle (37), and the third brush roller (6) and the third screen support (38) are parallel to each other, and brushes of the third brush roller (6) periodically sweep the surface of the screen (33) of the third screen support (38) when the third brush roller (6) rotates.

7. The precision casting integrated floating sand device as claimed in claim 1, further comprising a high-pressure centrifugal fan (7), wherein an air outlet of the high-pressure centrifugal fan (7) is communicated with an air inlet at the bottom of the floating sand barrel (1).

8. The precision casting integrated floating sand device as claimed in claim 1, further comprising a sand storage hopper (8), wherein the sand storage hopper (8) is fixedly arranged on the side surface of the floating sand barrel (1), and a sand outlet at the bottom of the sand storage hopper (8) is selectively communicated with a feed inlet at the bottom of the hoister (2).

9. The precision casting integrated floating sand device as claimed in claim 8, wherein the sand storage sand hopper (8) further comprises a first gate valve (81), and the first gate valve (81) is installed at the position of the sand outlet at the bottom of the sand storage sand hopper (8) and used for controlling the opening and closing of the sand outlet at the bottom of the sand storage sand hopper (8).

10. The precision casting integrated floating sand device as claimed in claim 1, wherein the floating sand tank (1) further comprises a second gate valve (11), and the second gate valve (11) is installed at the bottom outlet position of the floating sand tank (1) and is used for controlling the opening and closing of the bottom outlet of the floating sand tank (1).

Technical Field

The invention relates to the technical field of precision casting equipment, in particular to precision casting integrated floating sand equipment.

Background

The shell making process in the precision casting industry is to adopt a dewaxing method to prepare a shell, and adopt a module to carry out slurry dipping, sand coating, air drying and hardening for many times so as to obtain a sand film with a certain thickness, and then the shell capable of pouring molten metal can be obtained after dewaxing.

The last sand equipment commonly used drenches the sand, float sand and sand throwing three well modes, it is applied to back up coat system shell technology usually to float the sand mode, because the module is stained with the condition that has the thick liquid hourglass when thick liquid goes up the sand in floating sand equipment through being stained with, the thick liquid that drips the hourglass can bond the blocking with the sand that floats in the sand equipment, block up the nozzle that floats sand equipment lower floor, the effect of sand is gone up in the influence, float sand equipment must shut down after working a period of time among the prior art, the mode through artifical screening sand clears up the operation, labor intensity is big, and can influence the productivity.

Disclosure of Invention

In view of the above, the present invention provides an integrated precision casting floating sand device capable of automatically screening sand.

The technical scheme of the invention is realized as follows: the invention provides a precision casting integrated floating sand device, which comprises a floating sand barrel, a lifter and a sand screening box, the sand screening box further comprises a box body, a first screen support, a screen and a waste sand pipe, wherein a sand inlet is formed in the top of the box body, a first screen support is obliquely and fixedly arranged below the sand inlet in the box body, the sand inlet is located in the first screen support along the downward projection of the vertical direction, the top and two sides of the first screen support are all tightly connected with the inner wall of the box body, the lower end of the box body is communicated with the inner side of a floating sand barrel, the lower end of the first screen support, close to the side where the sand inlet is formed, of the box body, is communicated with the inner wall of the box body through the waste sand pipe, the screen is mounted on the first screen support, the lower surface of the first screen support is communicated with the inner side of the floating sand barrel, the bottom of the floating sand barrel is selectively communicated with a feeding hole in the bottom of a lifting machine, and a discharging hole in the.

On the basis of the technical scheme, the screen cloth cleaning device preferably further comprises a first brush roller, the first brush roller is rotatably installed in the box body and is arranged on the upper surface of the first screen cloth support in parallel, and when the first brush roller rotates, brushes periodically sweep the screen cloth surface of the first screen cloth support.

On the basis of the technical scheme, preferably, the first brush rollers are arranged in the horizontal direction, the number of the first brush rollers can be multiple, and the first brush rollers are arranged in parallel.

On the basis of the technical scheme, preferably, the sand screening box further comprises a first baffle and a second screen support, the bottom of the first screen support is fixedly connected with the first baffle, the upward projection of the first baffle along the vertical direction is located in the first screen support, two sides of the first baffle are closely connected with the inner wall of the box body, one side, away from the first screen support, of the first baffle is provided with the second screen support, the top and two sides of the second screen support are closely connected with the inner wall of the box body, a channel is formed between the second screen support and the inner wall of the box body, the bottom opening of the channel is communicated with the outer side of the box body through a waste sand pipe, a screen is fixedly mounted on the second screen support, and the lower surface of the second screen support is communicated with the inner side of the floating sand barrel.

On the basis of the technical scheme, the screen cloth cleaning device is preferable to further comprise a second brush roller, the second brush roller is rotatably installed in the box body and located between the second screen cloth support and the first baffle plate, the second brush roller and the second screen cloth support are parallel to each other, and when the second brush roller rotates, brushes of the second brush roller periodically sweep the screen cloth surface of the second screen cloth support.

On the basis of the above technical scheme, preferably, the second brush rollers are arranged in the horizontal direction, the number of the second brush rollers can be multiple, and the second brush rollers are arranged in parallel.

Further preferably, the sand screening box further comprises a second baffle and a third screen support, the bottom of the second screen support is fixedly connected with the second baffle, the upward projection of the second baffle along the vertical direction is located in the second screen support, two sides of the second baffle are tightly connected with the inner wall of the box body, one side, away from the second screen support, of the second baffle is provided with the third screen support, the top of the third screen support is tightly connected with the bottom of the first baffle, two sides of the third screen support are tightly connected with the inner wall of the box body, a channel is formed between the third screen support, the second baffle and the inner wall of the box body, an opening in the bottom of the channel is communicated with the outer side of the box body through a waste sand pipe, a screen is fixedly installed on the third screen support, and the lower surface of the third screen support is communicated with the inner side of the floating sand.

On the basis of the technical scheme, the screen cloth cleaning machine further comprises a third brush roller, the third brush roller is rotatably installed in the box body and located between the third screen cloth support and the second baffle, the third brush roller and the third screen cloth support are parallel to each other, and when the third brush roller rotates, brushes periodically sweep the surface of the screen cloth of the third screen cloth support.

On the basis of the above technical scheme, preferably, the third brush rollers are arranged in the horizontal direction, the number of the third brush rollers can be multiple, and the multiple third brush rollers are arranged in parallel.

On the basis of the above technical scheme, preferably, first screen support, second screen support and third screen support are the frame construction of middle fretwork, and the fretwork department is equipped with the screen cloth.

On the basis of the technical scheme, the brush device is preferable to further comprise an external driving motor, and the external driving motor drives the first brush roller, the second brush roller and the third brush roller to rotate.

On the basis of the technical scheme, the sand floating device is preferred to further comprise a high-pressure centrifugal fan, and an air outlet of the high-pressure centrifugal fan is communicated with an air inlet at the bottom of the sand floating barrel.

On the basis of the technical scheme, the sand floating device is preferred to further comprise a sand storage hopper, the sand storage hopper is fixedly installed on the side face of the floating sand barrel, and a sand outlet at the bottom of the sand storage hopper is selectively communicated with a feeding hole at the bottom of the lifting machine.

On the basis of the technical scheme, preferably, the sand storage sand hopper further comprises a first gate valve, and the first gate valve is installed at the position of the sand outlet at the bottom of the sand storage sand hopper and used for controlling the opening and closing of the sand outlet at the bottom of the sand storage sand hopper.

On the basis of the technical scheme, preferably, the floating sand barrel further comprises a second gate valve, and the second gate valve is installed at the outlet position at the bottom of the floating sand barrel and used for controlling the opening and closing of the outlet at the bottom of the floating sand barrel.

On the basis of the technical scheme, the sand floating device further comprises a dust hood, wherein the dust hood is fixedly installed at the opening at the top end of the sand floating barrel.

Compared with the prior art, the precision casting integrated floating sand equipment has the following beneficial effects:

(1) the invention adopts a lifter to lift sand grains in a floating sand barrel, and utilizes a sand screening box to filter and screen the sand grains, so that the sand grains meeting the requirements enter the floating sand barrel, and are discharged out of a box body and are separately collected, the sand screening box makes the sand grains fall down by utilizing the action of gravity and are respectively filtered by a screen on a first screen bracket, the lower surface of the screen is communicated with the inside of the floating sand barrel through the box body, and the upper surface of the screen is communicated with the outside through a waste sand pipe;

(2) in order to guarantee the utilization rate of sand grains in the sand screening mode, the second screen support and the third screen are arranged directly, the corresponding brush rollers are arranged on the screen supports, the multiple screen supports can filter the sand grains for multiple times, and the brush rollers can prevent the sand grains from falling too fast and being incapable of being filtered completely.

(3) The sand filtering and recycling device can rapidly filter and recycle sand grains in the floating sand barrel, can independently discharge and collect non-conforming sand grains, is provided with the sand storage hopper, can realize sand screening and sand supplementing, does not need manual sand screening and sand supplementing, shortens the sand supplementing working time and improves the production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of an integrated float sand apparatus for precision casting according to the present invention;

FIG. 2 is a front view of a floating sand tank in the precision casting integrated floating sand device of the present invention;

FIG. 3 is a front view of a hoist in the precision casting integrated floating sand device of the present invention;

FIG. 4 is a front cross-sectional view of a screen box in the precision casting integrated sand floating apparatus of the present invention;

FIG. 5 is a front view of a sand storage hopper in the integrated float sand device for precision casting according to the present invention.

In the figure: 1-floating sand barrel, 11-second inserting plate, 2-lifting machine, 3-screening sand box, 31-box, 32-first screen support, 33-screen, 34-waste sand pipe, 35-first baffle, 36-second screen support, 37-second baffle, 38-third screen support, 4-first brush roller, 5-second brush roller, 6-third brush roller, 7-high pressure centrifugal fan, 8-sand storage sand hopper and 81-first inserting plate valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 and combined with fig. 2-5, the precision casting integrated floating sand device of the invention comprises a floating sand bucket 1, a hoist 2, a sand screening box 3, a first brush roller 4, a second brush roller 5, a third brush roller 6, a high-pressure centrifugal fan 7 and a sand storage hopper 8.

Float sand bucket 1 is used for blowing to float thereby letting float sand can hang sand on the wax coat that the coating has the silica sol, the bottom that floats sand bucket is the air chamber, air chamber upper portion is for storing up the sand chamber, be equipped with aerated structure between air chamber and the sand storage chamber, generally the venthole that sets up for the array, the suction hood is installed to the open-top of float sand bucket 1, prevent that float sand from flying upward and floating and influence the production environment in the air, float sand bucket 1 and set up the opening of leaking sand in the side of sand storage chamber bottom for arrange sand.

The hoisting machine 2 is used for transporting sand discharged from the floating sand barrel 1 to the high-position sand sieving box 3, so that sand inside the floating sand barrel 1 can be sieved, and the hoisting machine 2 can be a conventional hoisting machine, preferably a Z-shaped hoisting machine.

The sand screening box 3 is used for screening sand grains in the floating sand barrel 1 and conveying the qualified screened sand grains into the floating sand barrel 1 to screen off unqualified sand grains, the sand screening box 3 comprises a box body 31, a first screen support 32, a screen 33, a waste sand pipe 34, a first baffle 35, a second screen support 36, a second baffle 37 and a third screen support 38, the box body 31 is a shell with openings at the upper end and the lower end, the opening at the upper end of the box body 31 is communicated with a discharge port at the upper end of the elevator 2, the opening at the lower end of the box body 31 is communicated with a sand storage cavity of the floating sand barrel 1, the first screen support 32 is installed in the box body 31, the first screen support 32 is obliquely arranged, the upper end edge and the edges at the two sides of the first screen support 32 are precisely connected with the inner surface of the box body 31, the vertical downward projection of the opening at the upper end of the box body 31 is positioned in the first screen support 32, the first screen support 32, as a simple embodiment, the bottom edge of the first screen support 32 near the upper opening of the box 31 forms an enclosed opening with the inner wall of the box 31, and the opening is communicated with the outside of the box 31 through the waste sand pipe 34. Sand entering from an opening at the upper end of the box body 31 rolls on the screen mesh 33 of the first screen mesh support 32, is screened, is filtered when meeting the requirement of a screen mesh, and finally falls into the floating sand barrel 1, and is discharged through the waste sand pipe 34 after passing through the first screen mesh support 32 when not meeting the requirement of the screen mesh.

The screen cloth cleaning device is characterized by further comprising a first brush roller 4, the first brush roller 4 is horizontally arranged in the box body 31, the first brush roller 4 is parallel to the first screen cloth support 32, the first brush roller 4 is located at the upper end of the first screen cloth support 32, the first brush roller 4 rotates in the box body 31, and in the rotating process, brushes on the first brush roller 4 selectively brush the surface of a screen cloth 33 installed on the first screen cloth support 32.

The first brush roller 4 may serve to block sand and force the sand to fully contact the screen 33, preventing the sand meeting the requirements from being screened out and wasting raw materials.

In another preferred embodiment, the sand screening box 3 further includes a first baffle plate 35 and a second screen support 36, the second screen support 36 is obliquely arranged, the second screen support 36 is also provided with the screen 33, the first baffle plate 35 is tightly connected with the lower end of the first screen support 32, the second screen support 36 is fixedly arranged below the first baffle plate 35, two sides of the first baffle plate 35 are tightly connected with the inner wall of the box 31, the upward projection of the first baffle plate 35 in the vertical direction is positioned in the first screen support 32, the top and two sides of the second screen support 36 are tightly connected with the inner wall of the box 31, a channel is formed among the second screen support 36, the first baffle plate 35 and the inner wall of the box 31, the bottom opening of the channel is communicated with the outside of the box 31 through a waste sand pipe 34, and the bottom of the first baffle plate 35 is not connected with the inner wall of the box 31, so that sand screened on the first screen support 32 can reach the lower end of the box 31 through the gap between the first baffle plate 35 and the box 31 Opening and entering the floating sand bucket 1.

In the above embodiment, the sand falling from the surface of the first screen support 32 enters the second screen support 36 again, and is screened and filtered by the screen 33 mounted thereon, so as to achieve the purpose of secondary screening.

The screen cloth cleaning device further comprises a second brush roller 5, wherein the second brush roller 5 is rotatably installed in the box body 31, is horizontally arranged and is located between the first baffle 35 and the second screen cloth support 36, and brushes on the second brush roller 5 selectively brush the surface of the screen cloth 33 installed on the second screen cloth support 36 in the rotating process.

The second brush roller 5 has the same function as the first brush roller 4, and plays a role in blocking, so that sand particles are prevented from passing through the screen 33 too fast, and the purpose of complete screening cannot be achieved.

In another preferred embodiment, the screening machine further comprises a second baffle plate 37 and a third screen support 38, the bottom of the second screen support 36 is fixedly connected with the second baffle plate 37, the upward projection of the second baffle plate 37 along the vertical direction is located in the second screen support 36, two sides of the second baffle plate 37 are tightly connected with the inner wall of the box body 31, one side of the second baffle plate 37, which is far away from the second screen support 36, is provided with the third screen support 38, the top of the third screen support 38 is tightly connected with the bottom of the first baffle plate 35, two sides of the third screen support 38 are tightly connected with the inner wall of the box body 31, the third screen support 38, a channel is formed between the second baffle plate 37 and the inner wall of the box body 31, the bottom opening of the channel is communicated with the outer side of the box body 31 through the waste sand pipe 34, the third screen support 38 is fixedly provided with the screen 33, and the lower surface of the third screen support 38 is communicated with the inner side of the floating sand barrel 1.

When sand falls from the lower end of the second screen bracket 36, the sand enters the third screen bracket 38 and is filtered and screened through the screen 33 arranged on the third screen bracket 38, the purpose of screening for the third time is achieved, further qualified sand is prevented from being wasted, the bottom of the second baffle plate 37 is not connected with the inner wall of the box body 31, when the filtered sand falls on the second screen bracket 36, the sand can be blocked and guided through the upper surface of the second baffle plate 37, and finally falls through a channel between the bottom of the second baffle plate 37 and the inner wall of the box body 31 and enters the floating sand bucket 1.

The third brush roller 6 is rotatably installed in the box body 31, the third brush roller 6 is located between the third screen bracket 38 and the second baffle 37, the third brush roller 6 and the third screen bracket 38 are parallel to each other, and when the third brush roller 6 rotates, brushes periodically sweep the surface of the screen 33 of the third screen bracket 38.

The third brush roller 6 has the same function as the first brush roller 4, and plays a role in blocking, so that sand particles are prevented from passing through the screen 33 too fast, and the purpose of complete screening cannot be achieved.

Still include high-pressure centrifugal fan 7, high-pressure centrifugal fan 7 fixed mounting floats the side of sand bucket 1, and its air outlet communicates with the air intake of floating sand bucket 1 bottom to for floating sand bucket 1 provides wind-force, blow up the sand grain.

Still including storing up sand hopper 8, store up sand hopper 8 fixed mounting in the side of floating sand bucket 1, the discharge gate of storing up sand hopper 8 bottom communicates with the feed inlet of 2 bottoms of lifting machine each other, stores up sand hopper 8 and is used for providing fresh sand grain to the sand grain that floats sand bucket 1 consumption is replenished, when storing up sand hopper 8 and replenishing the sand grain simultaneously, can transport in sieve sand case 3 through lifting machine 2, sieves, thereby guarantees that the sand grain of replenishment accords with operation requirement.

Still include first push-pull valve 81, first push-pull valve 81 is installed to the discharge gate of storing up sand hopper 8 bottom, and opening and closing of 8 bottom openings of sand hopper are stored up in the control of first push-pull valve 81.

Still include second push-pull valve 11, float 1 bottom discharge gate position of sand bucket and install second push-pull valve 11, the opening and closing of 1 bottom discharge gate of sand bucket are floated in the control of second push-pull valve 11.

The first screen support 32, the second screen support 36 and the third screen support 38 are all frame structures with hollow-out middle parts and are used for fixedly mounting the screen 33.

The screen 33 is respectively arranged on the first screen bracket 32, the second screen bracket 36 and the third screen bracket 38 and is used for filtering sand grains, ensuring that the sand grains with the composite particle size requirement finally enter the sand floating barrel 1, and the sand grains which do not meet the requirement finally enter the waste sand pipe 34 and are discharged out of the box body 31.

The waste sand pipe 34 is used for discharging sand which is not qualified, and sand which is not sieved is prevented from entering the floating sand barrel 1.

The first barrier 35 is used to block and guide the sand screened from the first screen support 32 and guide it to the bottom of the tank 31 and finally into the sand floating barrel 1.

The second barrier 37 is used to block and guide the sand screened from the second screen support 36 and guide it to the bottom of the box 31 and finally into the sand floating barrel 1.

The top opening part of the floating sand barrel 1 is also provided with a dust hood which is used for adsorbing and filtering air at the opening part of the floating sand barrel 1, and floating sand is prevented from entering air and floating in the working environment to pollute the environment.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.