CN116921224B

CN116921224B - Sea sand grading and screening device

Info

Publication number: CN116921224B
Application number: CN202310959995.3A
Authority: CN
Inventors: 马咬福; 李寰; 薛广尉; 邱彬法
Original assignee: CSCEC Strait Construction and Development Co Ltd
Current assignee: CSCEC Strait Construction and Development Co Ltd
Priority date: 2023-08-01
Filing date: 2023-08-01
Publication date: 2025-07-22
Anticipated expiration: 2043-08-01
Also published as: CN116921224A

Abstract

The present invention relates to a sea sand grading and screening device, belonging to the technical field of building construction, comprising a support frame fixed on the ground and a multi-layer grading screen fixed on the top of the support frame, wherein a conveyor belt for conveying sand is arranged on the upper side of one end of the multi-layer grading screen, and the other end is arranged downwardly inclined from the horizontal plane, and the multi-layer grading screen is also connected to a discharging system for guiding out the screened sand, and a feeding system is arranged at the free end of the discharging system. The present invention can effectively separate sea sand and ensure the use effect of sea sand.

Description

Sea sand classifying and screening device

Technical Field

The invention relates to a sea sand classifying and screening device, and belongs to the technical field of building construction.

Background

In building decoration, engineering construction and the like, sand is an indispensable raw material, but with the recent economic development, demand for sand has become increasingly large and demand supply for sand has become increasingly intense. In order to improve the current situation, the sea sand is used more and more times, and coastal contains rich sand for use. However, sea sand is clean but contains many impurities such as shells, and the like, and the mined raw materials need to be further processed and strictly classified so as to remove conchiolin impurities and normalize sand materials with various particle sizes.

However, the sea sand processing technology has not been improved, is not standardized, and impurities such as shells and the like cannot be completely separated, so that the particle sizes cannot be completely separated, and improvement is urgently needed.

The simple automatic sand screening device disclosed in the Chinese patent publication No. CN214160491U comprises a vibrating motor, a connecting shaft sleeve, a screen frame and a screen, wherein the screen is installed and fixed in the screen frame, the screen frame is obliquely fixed on the screen frame through elastic rods arranged around the screen frame, and the vibrating motor is connected with the high end of the screen frame through the connecting shaft sleeve.

In the above-mentioned reference example, the screen is provided with only one layer, and the multistage sand particle size cannot be screened, so that the screening effect is poor, and improvement is urgently required.

Disclosure of Invention

In order to overcome the defects of poor separation effect and the like of sea sand caused by more impurities and more particle sizes of the prior sea sand shells, the invention designs the sea sand classifying and screening device which can effectively separate the sea sand and ensure the use effect of the sea sand.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

The utility model provides a sea sand classifying and screening device, includes the multilayer classifying screen of fixing on subaerial support frame and fixing on the support frame top, multilayer classifying screen one end upside is provided with the conveyer belt that is used for transporting sand, and the other end slope sets up downwards in the horizontal plane, multilayer classifying screen still is connected with the ejection of compact system that is used for deriving the sand after sieving, ejection of compact system free end is provided with conveying system.

Furthermore, an anti-blocking mechanism is arranged at the top end of the multilayer classifying screen and comprises a height sensor, an installation rod and a sliding sand raking device fixed at the top end of the installation rod, wherein the height sensor is externally connected with an upper computer and used for monitoring the height of sand after screening the top layer of the multilayer classifying screen, and the sliding sand raking device is externally connected with the upper computer and is used for raking the sand after screening the top layer of the multilayer classifying screen through a control signal sent by the upper computer.

The sliding sand raking device comprises a sliding base and a sliding clamping plate which is arranged at the upper end of the sliding base in a sliding mode, an opening is formed in a position, corresponding to one end of the sliding base and one end of the sliding clamping plate, the opening is communicated with the top of the multi-layer classifying screen, a swinging hinge piece is fixedly arranged at one end, far away from the opening, of the sliding clamping plate, a second cam is arranged at the free end of the hinge piece, a rotating shaft is fixedly sleeved on the second cam, the rotating shaft is driven to rotate through a transmission motor fixed on the sliding base, a bending elastic plate is arranged at the bottom end of the second cam, one end of the bending elastic plate is close to the hinge piece and is fixedly connected with the sliding clamping plate, the other end of the bending elastic plate is arranged right above the opening, and one end, close to the opening, of the bending elastic plate is bent.

Further, the hinge piece comprises a hinge seat fixed on the sliding clamping plate and a swinging rod hinged with the hinge seat, and the free end of the swinging rod is hinged with two side faces of the cam.

Further, the multilayer classifying screen comprises a screen box, a plurality of layers of screening nets which are sequentially fixed inside the screen box from top to bottom, a screen vibrator for vibrating each screening net and an up-down moving mechanism for driving the screen box to move up and down, wherein the screen box is movably connected with the support frame up and down through a plurality of high-strength springs, and each layer of screen vibrator is arranged on the screen.

Further, the upper and lower movable mechanism comprises a driving motor, a rotating wheel, a first cam and a baffle, wherein the driving motor is fixed at the top end of the supporting frame, the rotating wheel is rotatably installed at the top end of the supporting frame and connected with the rotating wheel through belt transmission, the first cam is coaxially connected with the rotating wheel in a transmission manner and is close to the first screening box, and the baffle is fixed on the side face of the screening box and is attached to the first cam at the bottom end of the baffle.

Further, the support frame includes the shaped steel stand of vertical setting and fixes the shaped steel crossbeam on shaped steel stand top, shaped steel crossbeam top is fixed with the main part link, high strength spring installs on shaped steel stand top, main part link one side is integrative to be fixed with auxiliary connection frame, driving motor installs on main part link top, the runner rotates and installs on auxiliary connection frame top.

Further, the discharging system comprises a plurality of discharging holes for guiding out sand after screening of each layer of screening net from top to bottom.

Further, supporting mechanism is installed to the support frame bottom, supporting mechanism includes the pre-buried connection base of pre-buried in ground inside and fixes the pre-buried steel sheet on connection base top, pre-buried steel sheet top and support frame fixed connection.

Further, the conveying system is a belt conveyor.

Further, compared with the prior art, the invention has the following characteristics and beneficial effects:

1. According to the invention, sea sand can be classified and multi-stage screening is realized through the arrangement of the multi-stage classifying screen, shell impurities with large particle sizes are separated in the first layer to realize the cleanliness of the sea sand, then sea sand with different particle sizes can be separated through the multi-stage screening, the sand materials with different particle sizes are beneficial to standardization, the subsequent use and construction are convenient, the arrangement of the supporting frame can provide an installation position for the multi-stage classifying screen, meanwhile, the sea sand is conveniently conveyed to the multi-stage classifying screen at a high position to screen by matching with the conveying belt, the screening effect can be effectively improved, the arrangement of the discharging system is convenient for collecting the screened sea sand, the arrangement of the conveying system is convenient for conveying the collected sea sand to the corresponding position, the screening of the sea sand with multiple particle sizes is realized through the mutual cooperation of devices, meanwhile, the collecting and conveying are finished, the screening efficiency is greatly improved, and the screening effect is improved.

2. According to the invention, sea sand can be screened through the arrangement of the screening net, the screening net can be conveniently vibrated through the arrangement of the screen vibrator, so that the screening efficiency is improved, meanwhile, in order to prevent damage caused by vibration, a certain buffering energy absorption can be performed through the arrangement of the high-strength spring, so that the stable operation of the device is facilitated, the screen box can be driven to move up and down by the arrangement of the upper and lower moving mechanisms, further, sea sand remained on the screen box can be shaken off, and meanwhile, when the screening net is blocked, the screen box can be driven to shake greatly by the upper and lower moving mechanisms, further, the blocked or agglomerated sand clusters are broken, further, the screening is facilitated, and the screening effect is improved.

3. According to the invention, the transmission motor drives the rotating shaft to rotate, the rotating shaft drives the cam II to rotate, the cam II continuously drives the swinging rod to swing and simultaneously to move back and forth in the rotating process, the swinging rod can be driven to move back and forth under the limiting action of the sliding base, the sliding base can drive the bending elastic plate to move back and forth, the cam II repeatedly props against the bending elastic plate in the continuously rotating process, the bending elastic plate can be made to periodically dig sea sand downwards, further the sea sand with the height exceeding a limit can be scraped, the elasticity of the bending elastic plate can be utilized through the arrangement of the bending elastic plate, and the sea sand can be scraped by matching with a series of transmission of the transmission motor, the rotating shaft, the cam II and the swinging rod, so that the sea sand height cannot exceed a limit value, and the stability of the multilayer classifying screen in the screening process is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a top view of the multi-layer sizing screen of the present invention;

FIG. 3 is a schematic view of a partially enlarged construction of the present invention;

FIG. 4 is a side view of a multi-layer sizing screen in a second embodiment of the present invention;

FIG. 5 is a schematic view of the anti-blocking mechanism of the present invention from a first perspective;

Fig. 6 is a schematic view of the structure of the anti-blocking mechanism according to the second aspect of the present invention.

Wherein the reference numerals are as follows:

1. the steel support comprises a support frame, a steel column, a 102, a steel beam, a 103, a high-strength bolt, a 104, a connecting base, a 105 and a pre-buried steel plate;

2. a multi-layer classifying screen; 203, a driving motor, 204, a high-strength spring, 206, a screening net, 207, a screening box, 208, a main body connecting frame, 209, an auxiliary connecting frame, 210, a first cam, 211, a rotating wheel, 212, a reinforced steel beam, 213 and a baffle;

3. a discharging system; 301, a first discharge port, 302, a second discharge port, 303, a third discharge port;

4. 401, a belt conveyor;

5. The anti-blocking mechanism comprises a sliding base, a sliding clamping plate, a mounting rod, a hinge seat, a swinging rod, a cam II, a 507, a rotating shaft, a 508, a transmission motor, a 509, a mounting plate, a 510, a bending elastic plate, a 511 and an opening.

Detailed Description

The present invention will be described in more detail with reference to examples.

Example 1

Referring to fig. 1,2 and 3, the sea sand classifying and screening device of the present embodiment includes a supporting frame 1 fixed on the ground and a multi-layer classifying screen 2 fixed on the top end of the supporting frame 1, wherein a conveyor belt for transporting sand is arranged on the upper side of one end of the multi-layer classifying screen 2, the other end of the multi-layer classifying screen 2 is inclined downward from the horizontal plane, a discharging system 3 for guiding out the screened sand is further connected to the multi-layer classifying screen 2, and a material conveying system 4 is arranged at the free end of the discharging system 3.

Wherein, conveying system 4 is belt conveyor 401, and stability is good, is fit for promoting and using.

As can be seen from the above description, the invention has the advantages that sea sand can be classified and multi-stage screening can be realized through the arrangement of the multi-stage classifying screen 2, shell impurities with large particle sizes are separated in the first layer to realize the cleaning of the sea sand, then sea sand with different particle sizes can be separated through multi-stage screening, thereby being beneficial to standardizing sand materials with different particle sizes, facilitating subsequent use and construction, providing an installation position for the multi-stage classifying screen 2 through the arrangement of the supporting frame 1, simultaneously facilitating the transportation of the sea sand to the multi-stage classifying screen 2 at a high position by being matched with the transportation belt for screening, effectively improving the screening effect, the arrangement of the discharging system 3 facilitates the collection of the screened sea sand, the arrangement of the conveying system 4 facilitates the transportation of the collected sea sand to the corresponding position, realizing the screening of the sea sand with multiple particle sizes through the mutual cooperation of all devices, simultaneously completing the collection and the transportation, and greatly improving the screening effect.

Further, the multi-layer classifying screen 2 comprises a screen box 207, a plurality of layers of screening nets 206 sequentially fixed inside the screen box 207 from top to bottom, a screen vibrator for vibrating each screening net 206, and an up-and-down moving mechanism for driving the screen box 207 to move up and down, wherein the screen box 207 is movably connected with the support frame 1 up and down through a plurality of high-strength springs 204, and each layer of screening net 206 is provided with a screen vibrator (not shown in the figure).

Wherein, screen cloth bobbing machine is used for vibrating the screening net 206 and shakes, and then can sieve the sand that the conveyer belt transported to the screening net 206 to the setting through multilayer screening net 206 sieves the sand of different particle diameter sizes, realizes multistage screening effect.

In this embodiment, the screen 206 is provided with two layers.

From the above description, it can be known that the sea sand can be screened through the setting of screening net 206, set up through screen cloth bobbing machine and conveniently vibrate screening net 206, and then accelerate screening efficiency, simultaneously, in order to prevent the destruction that the vibration caused, through setting up high strength spring 204, can carry out certain buffering energy-absorbing, and then be favorable to the steady operation of device, the setting of upper and lower movable mechanism can drive screen box 207 up-and-down motion, and then can shake off the sea sand of remaining on screen box 207, simultaneously when screen cloth 206 blocks up, also can drive the large amplitude shake of screen box 207 through upper and lower movable mechanism, and then will block up or the sand mass of caking is smashed, and then more be favorable to the screening, improve screening effect.

Further, the up-down moving mechanism comprises a driving motor 203, a rotating wheel 211, a first cam 210 and a baffle 213, wherein the driving motor 203 is fixed at the top end of the supporting frame 1, the rotating wheel 211 is rotatably installed at the top end of the supporting frame 1, the driving motor 203 is connected with the rotating wheel 211 through belt transmission, the first cam 210 is coaxially connected with the rotating wheel 211 in transmission, the first cam 210 is arranged close to the screen box 207, the baffle 213 is fixed on the side surface of the screen box 207, and the bottom end of the baffle 213 is attached to the first cam 210.

In this embodiment, two up-down moving mechanisms are provided, and are provided on both sides of the screen box 207, respectively.

As can be seen from the above description, by starting the driving motor 203, the rotating wheel 211 is driven to rotate, and then the first cam 210 is driven to rotate, the first cam 210 continuously lifts up the baffle 213 in the rotation process, and then the whole screen box 207 can be lifted up, sand remained on the screen box 207 can be shaken off onto the screen mesh 206, so as to further improve the screening effect, and the screen box 207 also moves downwards under the action of gravity and plays a role of buffering under the action of the high-strength spring 204.

Further, the support frame 1 comprises a profile steel upright post 101 arranged vertically and a profile steel beam 102 fixed at the top end of the profile steel upright post 101, a main body connecting frame 208 is fixed at the top end of the profile steel beam 102, a high-strength spring 204 is installed at the top end of the profile steel upright post 101, an auxiliary connecting frame 209 is integrally fixed at one side of the main body connecting frame 208, a driving motor 203 is installed at the top end of the main body connecting frame 208, and a rotating wheel 211 is rotatably installed at the top end of the auxiliary connecting frame 209.

From the above description, through setting up shaped steel stand 101 and shaped steel crossbeam 102, conveniently install multilayer classifying screen 2, set up multilayer classifying screen 2 in the higher position of height, be convenient for improve the screening effect of sea sand to be convenient for install ejection of compact system 3 and defeated material system 4, make structural arrangement more reasonable, be favorable to improving the work efficiency of follow-up ejection of compact and defeated material.

In this embodiment, the profile steel columns 101 are four and are rectangular, the profile steel beams 102 are two and are parallel to each other, and the main body connecting frame 208 is disposed in the middle of the profile steel beam 102.

Further, the discharge system 3 includes a plurality of discharge ports for guiding out the sand screened by the screen 206 of each layer from the top to the bottom.

In this embodiment, the discharge gate is provided with three, is discharge gate one 301, discharge gate two 302 and discharge gate three 303 respectively, and discharge gate one 301 sets up in the screen box 207 bottom, and discharge gate three 303 and discharge gate two 302 set up in the screen box 207 keep away from the one side of conveyer belt and be upper and lower distribution, and then realize the screening of the sand of three kinds of particle diameters.

Further, the supporting mechanism is installed to support frame 1 bottom, and supporting mechanism includes the pre-buried connection base 104 of pre-buried in ground inside and fixes the pre-buried steel sheet 105 at connection base 104 top, pre-buried steel sheet 105 top and support frame 1 fixed connection.

As can be seen from the above description, the connection stability between the support frame 1 and the ground is increased by the arrangement of the connection base 104 and the embedded steel plate 105, which is suitable for popularization and use.

Further, the connecting base 104 and the embedded steel plate 105 are connected through a plurality of high-strength bolts 103.

As is apparent from the above description, the connection stability of the structure is enhanced by the arrangement of the plurality of high-strength bolts 103, which is suitable for popularization and use.

Further, a reinforcing steel beam 212 is installed between the section steel column 101 and the high-strength spring 204.

As can be seen from the above description, the reinforced steel beam 212 can enhance the connection stability of the structure, and is suitable for popularization and use.

Further, a plurality of reinforcing plates are uniformly and fixedly installed between the embedded steel plate 105 and the profile steel upright post 101 along the circumferential direction.

From the above description, the reinforcing plate can enhance the stability of the structure, and is suitable for popularization and use.

The working principle of the embodiment is that unscreened sand is transported from a conveyor belt to fall into a screen box 207, then the screen vibrating machine vibrates a screen 206 to shake off sand with different particle sizes, then the sand is led out through a discharging system 3 and transported through a conveying system 4, screening is achieved, screening of sand with various particle sizes can be achieved through arrangement of a plurality of layers of screen 206, the problem that sea sand contains shell impurities is effectively avoided, and the usability of the sea sand is improved.

Example two

In order to prevent sea sand accumulation at the top end of the multi-layer classifying screen 2 and to improve sea sand screening efficiency, the top end of the screen box 207 is provided with an anti-blocking mechanism 5, which is defined as follows:

Referring to fig. 4, 5 and 6, an anti-blocking mechanism 5 is installed at the top end of the multi-layer classifying screen 2, the anti-blocking mechanism 5 comprises a height sensor, a mounting rod 503 and a sliding sand raking device fixed at the top end of the mounting rod 503, the height sensor is externally connected with an upper computer and is used for monitoring the height of sand screened by the top layer of the multi-layer classifying screen 2, and the sliding sand raking device is externally connected with the upper computer and is used for raking the sand screened by the top layer of the multi-layer classifying screen 2 through a control signal sent by the upper computer.

From the above description, it can be seen that the height of the sea sand at the top end of the multi-layer classifying screen 2 can be detected by arranging the height sensor, and then the sea sand can be monitored by the upper computer, and then the sea sand with the height exceeding the set value can be scraped by the sliding sand raking device controlled by the upper computer, so that collapse and leakage are prevented, and smooth screening work is ensured.

Further, the sliding sand raking device comprises a sliding base 501 and a sliding clamping plate 502 which is arranged at the upper end of the sliding base 501 in a sliding manner, an opening 511 is formed in a position, corresponding to one end of the sliding base 501 and one end of the sliding clamping plate 502, of the sliding clamping plate 511 is communicated with the top of the multi-layer classifying screen 2, a swinging hinge piece is fixedly arranged at one end, far away from the opening 511, of the sliding clamping plate 502, a second cam 506 is arranged at the free end of the hinge piece, a rotating shaft 507 is fixedly sleeved on the second cam 506, the rotating shaft 507 is driven to rotate through a transmission motor 508 fixed on the sliding base 501, a bending elastic plate 510 is arranged at the bottom end of the second cam 506, one end of the bending elastic plate 510 is close to the hinge piece and is fixedly connected with the sliding clamping plate 502, the other end of the bending elastic plate 510 is arranged right above the opening 511 in a bending manner close to one end of the opening 511.

Specifically, a mounting plate 509 is fixedly arranged on the side surface of the sliding base 501, and the transmission motor 508 is fixedly mounted on the mounting plate 509.

Further, the hinge member includes a hinge base 504 fixed to the sliding clamping plate 502 and a swing rod 505 hinged to the hinge base 504, where a free end of the swing rod 505 is hinged to a side of the cam second 506.

As can be seen from the above description, by the arrangement of the bending elastic plate 510, the sea sand can be raked by utilizing the elasticity of the bending elastic plate 510 and matching with a series of transmissions of the transmission motor 508, the rotation shaft 507, the cam two 506 and the swinging rod 505, so that the height of the sea sand can not exceed the limit value, and the stability of the multi-layer classifying screen 2 in the screening process is ensured.

When the working principle of the embodiment is working, the transmission motor 508 drives the rotation shaft 507 to rotate, the rotation shaft 507 drives the cam II 506 to rotate, the rotation of the cam II 506 continuously drives the swing rod 505 to swing and simultaneously move back and forth in the rotation process, the back and forth movement of the swing rod 505 can drive the sliding clamping plate 502 to move back and forth under the limiting action of the sliding base 501, the back and forth movement of the sliding base 501 can drive the bending elastic plate 510 to move back and forth, and the cam II 506 repeatedly supports the bending elastic plate 510 in the continuous rotation process, so that the bending elastic plate 510 can periodically dig down sea sand, and further the sea sand with the height exceeding the limit can be raked.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, unless explicitly stated or limited otherwise, the term "coupled" shall be interpreted as broadly, and may be, for example, fixedly coupled, detachably coupled, integrally coupled, mechanically coupled, electrically coupled, directly coupled, indirectly coupled via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Claims

1. The sea sand classifying and screening device is characterized by comprising a supporting frame (1) fixed on the ground and a multi-layer classifying screen (2) fixed at the top end of the supporting frame (1), wherein a conveying belt for conveying sand is arranged at the upper side of one end of the multi-layer classifying screen (2), the other end of the multi-layer classifying screen is inclined downwards relative to the horizontal plane, the multi-layer classifying screen (2) is also connected with a discharging system (3) for guiding out the screened sand, and the free end of the discharging system (3) is provided with a material conveying system (4);

An anti-blocking mechanism (5) is arranged at the top end of the multilayer classifying screen (2), the anti-blocking mechanism (5) comprises a height sensor, a mounting rod (503) and a sliding sand raking device fixed at the top end of the mounting rod (503), the height sensor is externally connected with an upper computer and is used for monitoring the height of sand screened by the top layer of the multilayer classifying screen (2), and the sliding sand raking device is externally connected with the upper computer and is used for raking the sand screened by the top layer of the multilayer classifying screen (2) through a control signal sent by the upper computer;

The sliding sand raking device comprises a sliding base (501) and a sliding clamping plate (502) which is slidably arranged at the upper end of the sliding base (501), an opening (511) is formed in a position, corresponding to one end of the sliding base (501) and one end of the sliding clamping plate (502), of the sliding clamping plate, the opening (511) is communicated with the top of a multi-layer classifying screen (2), a swinging hinging piece is fixedly arranged at one end, far away from the opening (511), of the sliding clamping plate (502), a second cam (506) is arranged at the free end of the hinging piece, a rotating shaft (507) is fixedly sleeved on the second cam (506), the rotating shaft (507) is driven to rotate through a transmission motor (508) fixed on the sliding base (501), a bending elastic plate (510) is arranged at the bottom end of the second cam (506), one end of the bending elastic plate (510) is close to the hinging piece and is fixedly connected with the sliding clamping plate (502), and the other end of the bending elastic plate (510) is arranged right above the opening (511) and close to one end of the opening (511).

2. A sea sand classifying screen according to claim 1, wherein the hinge member comprises a hinge base (504) fixed to the slide clamping plate (502) and a swinging rod (505) hinged to the hinge base (504), and the free end of the swinging rod (505) is hinged to the side of the cam II (506).

3. The sea sand classifying and screening device according to claim 1, wherein the multi-layer classifying screen (2) comprises a screen box (207), a plurality of layers of screening nets (206) which are sequentially fixed inside the screen box (207) from top to bottom, a screen vibrator for vibrating each screening net (206) and an up-and-down moving mechanism for driving the screen box (207) to move up and down, the screen box (207) is movably connected with the supporting frame (1) up and down through a plurality of high-strength springs (204), and each layer of screening nets (206) is provided with the screen vibrator.

4. A sea sand classifying and screening device according to claim 3, wherein the up-down moving mechanism comprises a driving motor (203), a rotating wheel (211), a first cam (210) and a baffle plate (213), the driving motor (203) is fixed at the top end of the supporting frame (1), the rotating wheel (211) is rotatably arranged at the top end of the supporting frame (1) and is connected with the rotating wheel (211) through a belt transmission, the first cam (210) is coaxially connected with the rotating wheel (211) in a transmission manner, the first cam (210) is arranged close to the screen box (207), and the baffle plate (213) is fixed on the side face of the screen box (207) and the bottom end of the baffle plate (213) is attached to the first cam (210).

5. The sea sand classifying and screening device according to claim 4, wherein the supporting frame (1) comprises a profile steel upright post (101) which is vertically arranged and a profile steel cross beam (102) which is fixed at the top end of the profile steel upright post (101), a main body connecting frame (208) is fixed at the top end of the profile steel cross beam (102), the high-strength spring (204) is installed at the top end of the profile steel upright post (101), an auxiliary connecting frame (209) is integrally fixed at one side of the main body connecting frame (208), the driving motor (203) is installed at the top end of the main body connecting frame (208), and the rotating wheel (211) is rotatably installed at the top end of the auxiliary connecting frame (209).

6. A sea sand classifying screen according to claim 1, wherein the discharge system (3) comprises a plurality of discharge openings for discharging sand from the screen (206) of each layer from top to bottom.

7. The sea sand classifying and screening device according to claim 1, wherein the supporting mechanism is arranged at the bottom end of the supporting frame (1) and comprises a connecting base (104) embedded in the ground and an embedded steel plate (105) fixed at the top end of the connecting base (104), and the top end of the embedded steel plate (105) is fixedly connected with the supporting frame (1).

8. A sea sand classifying and screening device according to claim 1, characterized in that the material conveying system (4) is a belt conveyor (401).