Sand screening device for constructional engineering

Abstract

The utility model discloses a sand screening device for constructional engineering, which belongs to the technical field of constructional engineering and comprises a driving component, a sand screening component and a sand screening component. The lower surface of the visual sensor is fixedly connected to the upper surface of the main body; the screening mechanism is arranged in the main body, and comprises a screen mesh arranged in the main body; the rotating assembly is arranged on the front end face of the main body; the connecting assemblies are arranged on the left side and the right side of the rotating assembly; the transmission assembly is arranged in the main body; according to the sand screening device, the screening mechanism is arranged, and the problems that according to a traditional sand screening device, workers need to continuously use shovels, time is long, a large amount of physical strength is consumed, lasting work cannot be achieved, the sand screening efficiency is reduced, and a large amount of labor force is consumed are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and in particular relates to a sand screening device for construction engineering. Background Art

[0002] Construction engineering is a complete process covering planning, investigation, design, construction, completion and other links. It not only includes the construction of housing buildings and their ancillary facilities, but also includes the installation of supporting lines, pipelines and equipment. The concept of construction engineering involves the construction, reconstruction or expansion of housing buildings and ancillary structures and facilities to the final engineering entity. This is a process that requires a lot of manpower, material resources, building materials and capital investment. In this process, not only technical work needs to be completed, but also the economic, social and cultural value of the project, as well as its impact on the environment, need to be considered. The necessity of sand screening in construction engineering is mainly reflected in screening out unnecessary impurities, ensuring the quality of construction sand, and improving construction quality and safety. Sand screening can not only remove hard particles such as gravel, but also screen out fine sand that does not meet construction requirements, to avoid these impurities affecting the performance of concrete and the stability of building structures. Modern sand screening equipment usually includes vibrating screens, drum screens and other forms, which can effectively separate coarse and fine particles in sand, and at the same time screen out some invisible impurities such as dust and soil.

[0003] In traditional sand screening devices, workers need to hold a shovel in their hands, shovel sand onto the surface of the shovel, and then throw the sand into the surface of the screen. The sand passes through the screen and enters the back of the screen, while other impurities are retained in front of the screen. Although this operation has a low cost, it requires workers to continuously use the shovel for a long time, consuming a lot of physical strength, and cannot work for a long time, which reduces the efficiency of sand screening and consumes a lot of labor. Utility Model Content

[0004] In view of the problems existing in the prior art, the utility model provides a sand screening device for construction projects, which has the advantage of automatically shoveling sand into the screen for comprehensive sand screening, and solves the problem that traditional sand screening devices, although low in cost, require workers to continuously use shovels for a long time, consuming a lot of physical strength, and cannot work for a long time, thereby reducing sand screening efficiency and consuming a lot of labor.

[0005] The utility model is implemented in this way: a sand screening device for construction engineering, comprising:

[0006] main body;

[0007] Rollers: There are four rollers, which are rotatably connected to the bottom of the main body;

[0008] Driving assembly: the driving assembly is arranged inside the main body;

[0009] Visual sensor: the lower surface of the visual sensor is fixedly connected to the upper surface of the main body;

[0010] Screening mechanism: The screening mechanism is arranged inside the main body, and includes:

[0011] Screen: The screen is arranged inside the main body;

[0012] Rotating assembly: the rotating assembly is arranged on the front end surface of the main body;

[0013] Connecting assembly: The connecting assembly is arranged on the left and right sides of the rotating assembly;

[0014] Transmission assembly: the transmission assembly is arranged inside the main body;

[0015] Main motor: The main motor is arranged at the rear end surface of the main body.

[0016] As a preferred embodiment of the present invention, the rotating assembly includes:

[0017] First rotating rod: the first rotating rod runs through the interior of the main body, and the outer surface of the first rotating rod is rotatably connected to the inner surface of the main body through a rotating shaft;

[0018] Rotating member: two rotating members are provided, and opposite sides of the two rotating members are fixedly connected to the left and right sides of the first rotating rod;

[0019] Shovel block: The left and right sides of the shovel block are fixedly connected to the opposite side of the rotating member.

[0020] As a preferred embodiment of the present invention, two connecting assemblies are provided, and the two connecting assemblies include:

[0021] First connecting column: the first connecting column has an opposite side which is rotatably connected to the opposite side of the rotating member via a rotating shaft;

[0022] Connecting rod: one side of the connecting rod is fixedly connected to the opposite side of the first connecting column;

[0023] Second connecting column: the opposite side of the second connecting column is rotatably connected to the opposite side of the connecting rod through a rotating shaft;

[0024] Travel rail: The travel rail is opened on the left and right sides of the main body, and the outer surface of the second connecting column is connected with the inner surface of the travel rail.

[0025] As a preferred embodiment of the present invention, the transmission assembly includes:

[0026] Travel block: two travel blocks are provided, and the upper surfaces of the two travel blocks are fixedly connected to the inner surface of the main body;

[0027] Sliding block: two sliding blocks are provided, the upper and lower surfaces of the two sliding blocks are slidably connected to the inner surface of the travel block, the second connecting column penetrates the inner surface of the sliding block, and the outer surface of the second connecting column is rotatably connected to the inner surface of the sliding block through a rotating shaft;

[0028] Positive and negative threaded rod: the front end surface of the positive and negative threaded rod is rotatably connected to the inner surface of the main body through a rotating shaft, and the rear end surface of the positive and negative threaded rod is rotatably connected to the output end of the main motor;

[0029] Transmission block: the inner surface of the transmission block is rotationally connected to the outer surface of the forward and reverse threaded rod through threads, and the left and right sides of the transmission block are rotationally connected to the opposite side of the second connecting column through a rotating shaft.

[0030] As a preferred embodiment of the present invention, the upper surface of the screen is provided with a rotating assembly, including:

[0031] Tooth plate: the lower surface of the tooth plate is fixedly connected to the upper surface of the screen;

[0032] Special-shaped gear: the outer surface of the special-shaped gear and the outer surface of the tooth plate are in a mutually meshing relationship;

[0033] Output rod: the front end surface of the output rod is fixedly connected to the rear end surface of the special-shaped gear;

[0034] Auxiliary motor: the output end of the auxiliary motor is rotatably connected to the rear end surface of the output rod, and the rear end surface of the auxiliary motor is fixedly connected to the inner surface of the main body;

[0035] Fixed rod: The rear end face of the fixed rod is rotatably connected to the front end face of the special-shaped gear through a rotating shaft, and the upper end face of the fixed rod is fixedly connected to the inner surface of the main body.

[0036] As a preferred embodiment of the present invention, the right end surface of the screen is provided with a rebound component, including:

[0037] Telescopic column: two telescopic columns are provided, the right end surfaces of the two telescopic columns are fixedly connected to the inner surface of the main body, and the left end surface of the telescopic column is fixedly connected to the right end surface of the screen;

[0038] Pressure relief spring: two pressure relief springs are provided, both of which are sleeved on the outer surface of the telescopic column, the right end surface of the pressure relief spring is fixedly connected to the inner surface of the main body, and the left end surface of the pressure relief spring is fixedly connected to the right end surface of the screen;

[0039] Sliding groove: The sliding groove is opened on the inner surface of the main body, and the lower surface of the screen is slidably connected to the inner wall of the sliding groove.

[0040] As a preferred embodiment of the present invention, a discharging assembly is provided on the lower surface of the main body, including:

[0041] Second rotating rod: both left and right ends of the second rotating rod are rotatably connected to the inner surface of the main body through a rotating shaft;

[0042] Rotating plate: two rotating plates are provided, and opposite sides of the two rotating plates are fixedly connected to the outer surface of the second rotating rod.

[0043] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0044] 1. The utility model is provided with a screening mechanism. When sand needs to be screened, the main motor is started through the controller, and the main motor drives the transmission component to move the auxiliary transmission block inside the transmission component backward. The transmission block drives the second connecting column inside the connecting component to move backward together. The movement of the second connecting column causes the connecting component to rotate upward. The rotation of the connecting component drives the rotating component to rotate. The rotating component throws the sand into the shell and into the surface of the screen, thereby achieving the effect of automatically shoveling sand into the screen for sand screening without manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of a three-dimensional structure provided by an embodiment of the utility model;

[0046] Figure 2 It is a full cross-sectional schematic diagram provided by an embodiment of the utility model;

[0047] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0048] Figure 4 It is a full cross-sectional schematic diagram provided by an embodiment of the utility model.

[0049] In the figure: 1. main body; 2. roller; 3. driving assembly; 4. visual sensor; 5. screening mechanism; 510. screen; 520. rotating assembly; 521. first rotating rod; 522. rotating member; 523. shovel block; 530. connecting assembly; 531. first connecting column; 532. connecting rod; 533. second connecting column; 534. travel rail; 540. transmission assembly; 541. travel block; 542. sliding block; 543. positive and negative threaded rod; 544. transmission block; 550. main motor; 6. rotating assembly; 601. tooth plate; 602. special-shaped gear; 603. output rod; 604. auxiliary motor; 605. fixed rod; 7. rebound assembly; 701. telescopic column; 702. pressure-relief spring; 703. sliding groove; 8. discharging assembly; 801. second rotating rod; 802. rotating plate. DETAILED DESCRIPTION

[0050] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0051] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0052] like Figures 1 to 4 As shown, the embodiment of the utility model provides a sand screening device for construction engineering, comprising:

[0053] Subject 1;

[0054] Roller 2: There are four rollers 2, which are rotatably connected to the bottom of the main body 1;

[0055] Driving assembly 3: The driving assembly 3 is arranged inside the main body 1;

[0056] Visual sensor 4: The lower surface of the visual sensor 4 is fixedly connected to the upper surface of the main body 1;

[0057] Screening mechanism 5: Screening mechanism 5 is arranged inside the main body 1, and includes:

[0058] Screen 510: Screen 510 is arranged inside the main body 1;

[0059] Rotating assembly 520: The rotating assembly 520 is disposed on the front end surface of the main body 1;

[0060] Connecting assembly 530: The connecting assembly 530 is disposed on the left and right sides of the rotating assembly 520;

[0061] Transmission assembly 540: The transmission assembly 540 is disposed inside the main body 1;

[0062] Main motor 550: The main motor 550 is arranged on the rear end surface of the main body 1.

[0063] refer to Figure 1 As shown, the rotating assembly 520 includes:

[0064] First rotating rod 521: The first rotating rod 521 runs through the interior of the main body 1, and the outer surface of the first rotating rod 521 is rotatably connected to the inner surface of the main body 1 through a rotating shaft;

[0065] Rotating member 522: Two rotating members 522 are provided, and opposite sides of the two rotating members 522 are fixedly connected to the left and right sides of the first rotating rod 521;

[0066] Shovel block 523: The left and right sides of the shovel block 523 are fixedly connected to the opposite side of the rotating member 522.

[0067] The above scheme is adopted: when it is necessary to screen sand, the staff can start the driving component 3 through the controller, so that the driving component 3 allows the roller 2 to rotate and drives the entire device to move forward until the upper surface of the shovel block 523 is filled with sand. When the visual sensor 4 observes that there is sand on the upper surface of the shovel block 523, the visual sensor 4 transmits an electrical signal to the controller, and the controller starts the main motor 550. The main motor 550 starts to indirectly drive the rotating member 522, so that the rotating member 522 rotates upward with the first rotating rod 521 as the rotation center. The rotating member 522 drives the shovel block 523 to rotate upward together, and the sand on the upper surface of the shovel block 523 is thrown onto the surface of the screen 510 inside the main body 1.

[0068] refer to Figure 1 As shown, two connection components 530 are provided, and the two connection components 530 include:

[0069] First connecting column 531: One side of the first connecting column 531 is rotatably connected to the opposite side of the rotating member 522 via a rotating shaft;

[0070] Connecting rod 532: One side of the connecting rod 532 is fixedly connected to the opposite side of the first connecting column 531;

[0071] Second connecting column 533: The opposite side of the second connecting column 533 is rotatably connected to the opposite side of the connecting rod 532 via a rotating shaft;

[0072] Travel rail 534 : The travel rail 534 is disposed on the left and right sides of the main body 1 , where the outer surface of the second connecting column 533 is connected to the inner surface of the travel rail 534 .

[0073] The above scheme is adopted: when the rotating member 522 needs to rotate upward, the second connecting column 533 moves backward on the inner surface of the travel rail 534, and the second connecting column 533 moves backward quickly to drive the connecting rod 532, so that the connecting rod 532 is forced to rotate upward, and the connecting rod 532 drives the first connecting column 531, so that the first connecting column 531 moves with the connecting rod 532, and the connecting rod 532 drives the rotating member 522 to rotate.

[0074] refer to Figure 2 As shown, the transmission assembly 540 includes:

[0075] Travel block 541: Two travel blocks 541 are provided, and the upper surfaces of the two travel blocks 541 are fixedly connected to the inner surface of the main body 1;

[0076] Sliding block 542: Two sliding blocks 542 are provided, and the upper and lower surfaces of the two sliding blocks 542 are slidably connected to the inner surface of the travel block 541, the second connecting column 533 penetrates the inner surface of the sliding block 542, and the outer surface of the second connecting column 533 is rotatably connected to the inner surface of the sliding block 542 through a rotating shaft;

[0077] The forward and reverse threaded rod 543: the front end surface of the forward and reverse threaded rod 543 is rotatably connected to the inner surface of the main body 1 through a rotating shaft, and the rear end surface of the forward and reverse threaded rod 543 is rotatably connected to the output end of the main motor 550;

[0078] Transmission block 544: The inner surface of the transmission block 544 is rotationally connected to the outer surface of the forward and reverse threaded rod 543 through threads, and the left and right sides of the transmission block 544 are rotationally connected to the opposite side of the second connection column 533 through a rotating shaft.

[0079] The above scheme is adopted: when the second connecting column 533 needs to move backward, the main motor 550 drives the forward and reverse threaded rod 543 to rotate, the rotation of the forward and reverse threaded rod 543 causes the transmission block 544 to move backward along the outer surface of the forward and reverse threaded rod 543, the movement of the transmission block 544 drives the second connecting column 533 to move backward, the backward movement of the second connecting column 533 drives the sliding block 542, and the sliding block 542 moves backward along the inner surface of the travel block 541.

[0080] refer to Figure 3 As shown, a rotating assembly 6 is provided on the upper surface of the screen 510, including:

[0081] Tooth plate 601: the lower surface of the tooth plate 601 is fixedly connected to the upper surface of the screen 510;

[0082] Special-shaped gear 602: The outer surface of the special-shaped gear 602 and the outer surface of the tooth plate 601 are in a mutually meshing relationship;

[0083] Output rod 603: The front end surface of the output rod 603 is fixedly connected to the rear end surface of the special-shaped gear 602;

[0084] Auxiliary motor 604: the output end of the auxiliary motor 604 is rotatably connected to the rear end surface of the output rod 603, and the rear end surface of the auxiliary motor 604 is fixedly connected to the inner surface of the main body 1;

[0085] Fixed rod 605: The rear end face of the fixed rod 605 is rotatably connected to the front end face of the special-shaped gear 602 via a rotating shaft, and the upper end face of the fixed rod 605 is fixedly connected to the inner surface of the main body 1.

[0086] The above scheme is adopted: when sand screening is carried out, the controller starts the auxiliary motor 604, and the auxiliary motor 604 drives the output rod 603 to rotate, and the output rod 603 rotates to drive the special-shaped gear 602 to rotate, and the toothed side of the special-shaped gear 602 meshes with the tooth plate 601, so that the tooth plate 601 moves to the right, and the tooth plate 601 drives the screen 510 to move to the right.

[0087] refer to Figure 4 As shown, the right end surface of the screen 510 is provided with a rebound component 7, including:

[0088] Telescopic column 701: Two telescopic columns 701 are provided, and the right end surfaces of the two telescopic columns 701 are fixedly connected to the inner surface of the main body 1, and the left end surface of the telescopic column 701 is fixedly connected to the right end surface of the screen 510;

[0089] Pressure relief spring 702: Two pressure relief springs 702 are provided, and both pressure relief springs 702 are sleeved on the outer surface of the telescopic column 701, the right end surface of the pressure relief spring 702 is fixedly connected to the inner surface of the main body 1, and the left end surface of the pressure relief spring 702 is fixedly connected to the right end surface of the screen 510;

[0090] Sliding groove 703 : The sliding groove 703 is provided on the inner surface of the main body 1 , and the lower surface of the screen 510 is slidably connected to the inner wall of the sliding groove 703 .

[0091] The above scheme is adopted: when the tooth plate 601 moves to the right, the screen 510 moves to the right along the sliding groove 703, and the screen 510 moves to the right to squeeze the telescopic column 701 and the pressure-relief spring 702, so that the telescopic column 701 is shortened and the pressure-relief spring 702 is deformed. When the toothless side of the special-shaped gear 602 contacts the tooth plate 601, the pressure-relief spring 702 releases its elastic force at this time, pushing the screen 510 to move back, and the cycle is repeated to achieve the purpose of vibrating back and forth and accelerating the efficiency of sand screening.

[0092] refer to Figure 2 As shown, a discharge assembly 8 is provided on the lower surface of the main body 1, including:

[0093] Second rotating rod 801: both left and right ends of the second rotating rod 801 are rotatably connected to the inner surface of the main body 1 through a rotating shaft;

[0094] Rotating plate 802 : Two rotating plates 802 are provided, and opposite sides of the two rotating plates 802 are fixedly connected to the outer surface of the second rotating rod 801 .

[0095] The above solution is adopted: after the sand passes through the screen 510, it enters the shell and falls onto the upper surface of the rotating plate 802. When a certain amount of sand accumulates, the weight of the sand exerts downward pressure on the rotating plate 802, causing the rotating plate 802 to start rotating around the second rotating rod 801, and the sand flows out from the gap between the rotating plate 802 and the main body 1.

[0096] The working principle of this utility model:

[0097] When in use, when sand screening is required, the staff can start the driving assembly 3 through the controller, so that the driving assembly 3 rotates the roller 2 and drives the entire device to move forward until the upper surface of the shovel block 523 is filled with sand. When the visual sensor 4 observes that there is sand on the upper surface of the shovel block 523, the visual sensor 4 sends an electrical signal to the controller, and the controller starts the main motor 550. The main motor 550 starts to drive the forward and reverse threaded rod 543 to rotate. The forward and reverse threaded rod 543 rotates to cause the transmission block 544 to move backward along the outer surface of the forward and reverse threaded rod 543. The movement of the transmission block 544 drives the second connecting column 533 to move backward. The second connecting column 533 moves backward. 33 moves backward and drives the sliding block 542, so that the sliding block 542 moves backward along the inner surface of the travel block 541, the second connecting column 533 moves backward quickly and drives the connecting rod 532, so that the connecting rod 532 is forced to rotate upward, the connecting rod 532 drives the first connecting column 531, so that the first connecting column 531 moves together with the connecting rod 532, the connecting rod 532 drives the rotating member 522, so that the rotating member 522 rotates upward with the first rotating rod 521 as the rotation center, the rotating member 522 drives the shovel block 523 to rotate upward together, and the sand on the upper surface of the shovel block 523 is thrown onto the surface of the screen 510 inside the main body 1;

[0098] When screening sand, the controller starts the auxiliary motor 604, and the auxiliary motor 604 drives the output rod 603 to rotate. The rotation of the output rod 603 drives the special-shaped gear 602 to rotate. The toothed side of the special-shaped gear 602 meshes with the tooth plate 601, so that the tooth plate 601 moves to the right, and the screen 510 moves to the right along the sliding groove 703. The screen 510 moves to the right to squeeze the telescopic column 701 and the pressure-relief spring 702, so that the telescopic column 701 is shortened and the pressure-relief spring 702 is deformed. When the toothless side of the special-shaped gear 602 contacts the tooth plate 601, the pressure-relieving spring 702 releases its elastic force, pushing the screen 510 to move back, repeating the cycle to speed up the efficiency of sand screening. After the sand passes through the screen 510, it enters the shell and falls onto the upper surface of the rotating plate 802. When a certain amount of sand accumulates, the weight of the sand applies downward pressure to the rotating plate 802, causing the rotating plate 802 to start rotating around the second rotating rod 801, and the sand flows out from the gap between the rotating plate 802 and the main body 1.

[0099] To sum up: this sand screening device for construction engineering, through the main body 1, roller 2, drive assembly 3, visual sensor 4, screening mechanism 5, rotating assembly 6, rebound assembly 7 and discharging assembly 8, solves the problem of traditional sand screening devices. Although the cost is low, it requires workers to continuously use shovels for a long time, consumes a lot of physical strength, cannot work for a long time, reduces sand screening efficiency, and consumes a lot of labor.

[0100] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0101] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand screening device for construction engineering, characterized in that: include: Subject (1); Rollers (2): four rollers (2) are provided, and the four rollers (2) are rotatably connected to the bottom of the main body (1); Driving component (3): the driving component (3) is arranged inside the main body (1); Visual sensor (4): the lower surface of the visual sensor (4) is fixedly connected to the upper surface of the main body (1); Screening mechanism (5): the screening mechanism (5) is arranged inside the main body (1), and comprises: Screen (510): the screen (510) is arranged inside the main body (1); Rotating assembly (520): the rotating assembly (520) is arranged on the front end surface of the main body (1); Connecting assembly (530): the connecting assembly (530) is arranged on the left and right sides of the rotating assembly (520); Transmission assembly (540): the transmission assembly (540) is arranged inside the main body (1); Main motor (550): the main motor (550) is arranged on the rear end surface of the main body (1).

2. A sand screening device for construction engineering as claimed in claim 1, characterized in that: The rotating assembly (520) comprises: First rotating rod (521): the first rotating rod (521) penetrates the interior of the main body (1), and the outer surface of the first rotating rod (521) is rotatably connected to the inner surface of the main body (1) via a rotating shaft; Rotating member (522): two rotating members (522) are provided, and opposite sides of the two rotating members (522) are fixedly connected to the left and right sides of the first rotating rod (521); Shovel block (523): the left and right sides of the shovel block (523) are fixedly connected to the opposite side of the rotating member (522).

3. A sand screening device for construction engineering as claimed in claim 2, characterized in that: Two connection components (530) are provided, and the two connection components (530) include: A first connecting column (531): an opposite side of the first connecting column (531) is rotatably connected to an opposite side of the rotating member (522) via a rotating shaft; Connecting rod (532): an opposite side of the connecting rod (532) is fixedly connected to an opposite side of the first connecting column (531); A second connecting column (533): the opposite side of the second connecting column (533) is rotatably connected to the opposite side of the connecting rod (532) via a rotating shaft; Travel rail (534): the travel rail (534) is provided on the left and right sides of the main body (1), and the outer surface of the second connecting column (533) is connected to the inner surface of the travel rail (534).

4. A sand screening device for construction engineering as claimed in claim 3, characterized in that: The transmission assembly (540) comprises: Travel block (541): two travel blocks (541) are provided, and the upper surfaces of the two travel blocks (541) are fixedly connected to the inner surface of the main body (1); Sliding blocks (542): two sliding blocks (542) are provided, and upper and lower surfaces of the two sliding blocks (542) are slidably connected to the inner surface of the travel block (541); the second connecting column (533) penetrates the inner surface of the sliding block (542); and the outer surface of the second connecting column (533) is rotatably connected to the inner surface of the sliding block (542) via a rotating shaft; Positive and negative threaded rod (543): the front end surface of the positive and negative threaded rod (543) is rotationally connected to the inner surface of the main body (1) via a rotating shaft, and the rear end surface of the positive and negative threaded rod (543) is rotationally connected to the output end of the main motor (550); Transmission block (544): the inner surface of the transmission block (544) is rotationally connected to the outer surface of the forward and reverse threaded rod (543) via threads, and the left and right sides of the transmission block (544) are rotationally connected to the opposite side of the second connection column (533) via a rotating shaft.

5. A sand screening device for construction engineering as claimed in claim 1, characterized in that: The upper surface of the screen (510) is provided with a rotating assembly (6), comprising: Tooth plate (601): the lower surface of the tooth plate (601) is fixedly connected to the upper surface of the screen (510); Special-shaped gear (602): the outer surface of the special-shaped gear (602) and the outer surface of the toothed plate (601) are in a mutually meshing relationship; Output rod (603): the front end surface of the output rod (603) is fixedly connected to the rear end surface of the special-shaped gear (602); Auxiliary motor (604): the output end of the auxiliary motor (604) is rotatably connected to the rear end surface of the output rod (603), and the rear end surface of the auxiliary motor (604) is fixedly connected to the inner surface of the main body (1); Fixed rod (605): the rear end face of the fixed rod (605) is rotatably connected to the front end face of the special-shaped gear (602) via a rotating shaft, and the upper end face of the fixed rod (605) is fixedly connected to the inner surface of the main body (1).

6. A sand screening device for construction engineering as claimed in claim 1, characterized in that: The right end surface of the screen (510) is provided with a rebound component (7), comprising: Telescopic columns (701): two telescopic columns (701) are provided, the right end surfaces of the two telescopic columns (701) are fixedly connected to the inner surface of the main body (1), and the left end surface of the telescopic column (701) is fixedly connected to the right end surface of the screen (510); Pressure relief spring (702): two pressure relief springs (702) are provided, and the two pressure relief springs (702) are sleeved on the outer surface of the telescopic column (701), the right end surface of the pressure relief spring (702) is fixedly connected to the inner surface of the main body (1), and the left end surface of the pressure relief spring (702) is fixedly connected to the right end surface of the screen (510); Sliding groove (703): the sliding groove (703) is provided on the inner surface of the main body (1), and the lower surface of the screen (510) is slidably connected to the inner wall of the sliding groove (703).

7. A sand screening device for construction engineering as claimed in claim 1, characterized in that: A discharge assembly (8) is provided on the lower surface of the main body (1), comprising: Second rotating rod (801): both left and right ends of the second rotating rod (801) are rotatably connected to the inner surface of the main body (1) via a rotating shaft; Rotating plate (802): two rotating plates (802) are provided, and opposite sides of the two rotating plates (802) are fixedly connected to the outer surface of the second rotating rod (801).

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