Sand screening equipment for building construction

Abstract

The invention relates to the technical field of sand screening equipment, in particular to sand screening equipment for building construction. According to the technical scheme, the device comprises a base, a mounting frame, a screen box, a collecting box, a motor, a pump shell and a first rotating shaft, the mounting frame is arranged at the upper end of the base, the screen box is arranged at the upper end of the mounting frame, a screen mesh is arranged in the screen box, a side plate is arranged on one side of the screen box, a transmission wheel is arranged at the output end of the motor, and the outer wall of the first rotating shaft is sleeved with a first driven wheel. A first belt rotationally sleeves the outer wall of the first driven wheel and the outer wall of the transmission wheel, a second rotating shaft is arranged on one side of the upper portion of the base, a second driven wheel sleeves the outer wall of the first rotating shaft and the outer wall of the second rotating shaft, a second belt sleeves the outer wall of the second driven wheel, a spring is arranged at the lower end of the screen box, and an impeller is arranged at one end of the first rotating shaft. By arranging the linkage structural member, the problems that energy consumption and maintenance cost are possibly increased and more space and equipment management resources are needed when multiple motor equipment is used are solved.

Description

Technical Field

[0001] The invention relates to the technical field of sand screening equipment, and in particular to sand screening equipment used in building construction. Background Art

[0002] Sand screening equipment is a process used to separate gravel, sand and other granular materials. It can remove impurities, ensure uniform particle size, and improve the quality of building materials such as concrete and asphalt. Sand screening equipment plays a key role in construction. By screening and processing raw materials, it ensures that building materials meet the requirements and increases the stability and durability of building structures.

[0003] The sand screening process may generate a certain amount of dust. If not effectively controlled, it may have adverse effects on the health of operators and the surrounding environment. Vibrating sand screening equipment can efficiently screen out the required particulate materials and help materials pass through the screen more quickly, improving production efficiency and quality. Suction dust suppression equipment can effectively control the dust generated during the sand screening process, reduce the dust content in the air, reduce environmental pollution and protect the health of workers.

[0004] However, the use of vibrating sand screening equipment and dust suppression equipment at the same time requires at least two sets of motor equipment. Using two or more motor equipment may increase energy consumption and maintenance costs, and require more space and equipment management resources. Therefore, those skilled in the art provide a sand screening equipment for construction to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a sand screening device for construction in view of the problems existing in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sand screening equipment for construction, comprising a base, a mounting frame, a screen box, a collecting box, a motor, a pump casing and a rotating shaft 1, wherein a mounting frame is arranged on the upper end of the base, a screen box is arranged on the upper end of the mounting frame, a screen is arranged inside the screen box, a side plate is arranged on one side of the screen box, a transmission wheel is arranged on the output end of the motor, a driven wheel 1 is sleeved on the outer wall of the rotating shaft 1, and a belt 1 is rotatably sleeved on the outer wall of the driven wheel 1 and the outer wall of the driving wheel, a rotating shaft 2 is arranged on one side above the base, a driven wheel 2 is sleeved on the outer wall of the rotating shaft 1 and the rotating shaft 2, and a belt 2 is sleeved on the outer wall of the driven wheel 2, springs connected to the mounting frame are arranged at the four corners of the lower end of the screen box, and an impeller rotatably mounted inside the pump casing is arranged on one end of the rotating shaft 1.

[0007] Preferably, the pump housing suction end is provided with a suction pipe penetrating the collection box, and the collection box is provided with a filter cover located on one side of the suction pipe. The suction force of the suction pipe is connected to the collection box, and the suction airflow is filtered through the filter cover to prevent the suctioned dust from entering the pump housing.

[0008] Preferably, the lower end of the screen box is open, and a suction hood is provided at the upper end of the screen box. The suction hood intercepts the upper end of the screen box to prevent the sand material screened inside the screen box from being ejected to the outside.

[0009] Preferably, a connecting pipe is installed between the suction hood and the collection box, a discharge port is provided at the lower end of the collection box, and a control valve is provided inside the discharge port. The connecting pipe applies the suction force connected to the inside of the collection box to the inside of the screen box, discharges the sand inside the collection box through the discharge port, and the control valve controls the opening and closing of the discharge port.

[0010] Preferably, a through hole is provided inside the mounting frame, and a guide rod is provided at the lower end of the screen box, which is located inside the spring and slides through the through hole. The guide rod slides longitudinally inside the mounting frame through the through hole, thereby guiding the spring during the expansion and contraction process to prevent the spring from deflecting outward.

[0011] Preferably, a bearing bracket 1 is provided at one end of the collection box, and the output end of the motor is rotatably mounted inside the bearing bracket 1. The bearing bracket 1 rotatably supports the output end of the motor.

[0012] Preferably, the upper end of the base is provided with a symmetrically distributed bearing bracket 2, and the rotating shaft 1 and the rotating shaft 2 are both rotatably mounted inside the bearing bracket 2. The rotating shaft 1 and the rotating shaft 2 are rotatably supported by the bearing bracket 2.

[0013] Preferably, one end of the rotating shaft 1 and the rotating shaft 2 is provided with a convex block, the convex block is semicircular, and one end of the screen box is provided with a side plate. The convex block rotates with the rotating shaft 1 and the rotating shaft 2, driving the convex block to press the side plate, and when the side plate is pressed, the pressing force acts on the screen box through the side plate.

[0014] Preferably, a ball bearing is rotatably mounted on the outer wall of the side plate, and a guide plate located below the screen box is fixed above the base. When the protrusion presses the side plate, the ball bearing rolls in contact with the side plate, reducing the resistance between the side plate and the protrusion, and the sand material passing through the screen is guided and transported through the guide plate.

[0015] Preferably, a feed port is provided at the upper end of the suction hood, and an inclined slot connected to the screen box is provided at one end of the screen box. The feed port is used as a feed port during the sand screening process, and the large-sized sand intercepted by the screen box is guided and transported through the inclined slot.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The sand material of the present invention is conveyed to the screen and screened, and the sand material of suitable specifications is screened. During the screening process, the screen material is elastically supported by a spring at the bottom, and the sand material is shaken and screened to improve the screening efficiency of the sand material. While screening, the dust is sucked by the negative pressure suction structure, thereby reducing the dust content in the air, reducing environmental pollution and protecting the health of workers. In addition, during the screening process, the shaking screening and the negative pressure dust suppression structure are driven by the same motor, which avoids additional energy consumption, improves energy utilization efficiency, reduces operating costs, and reduces system complexity and occupied space except for additional motor equipment, thereby reducing maintenance and management costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the main cross-sectional three-dimensional structure of the present invention;

[0020] Figure 3 It is a side view stereoscopic structural schematic diagram of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the side panel of the present invention from top view;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the transmission wheel of the present invention from a side view;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the collection box of the present invention in a side section;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the spring of the present invention from a side view.

[0025] Figure numerals: 1. base; 2. mounting frame; 3. screen box; 4. feed port; 5. collecting box; 6. suction hood; 7. chute; 8. guide plate; 9. screen; 10. bearing bracket one; 11. bearing bracket two; 12. motor; 13. pump casing; 14. transmission wheel; 15. rotating shaft one; 16. driven wheel one; 17. belt one; 18. impeller; 19. rotating shaft two; 20. driven wheel two; 21. belt two; 22. bump; 23. side plate; 24. ball bearing; 25. spring; 26. guide rod; 27. through hole; 28. filter cover; 29. ​​discharge port. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 7 , the present invention provides three embodiments:

[0028] Embodiment 1:

[0029] A sand screening device for construction, comprising a base 1, a mounting frame 2, a screen box 3, a collecting box 5, a motor 12, a pump casing 13 and a rotating shaft 15, wherein the upper end of the base 1 is provided with a mounting frame 2, the upper end of the mounting frame 2 is provided with a screen box 3, a screen mesh 9 is provided inside the screen box 3, a side plate 23 is provided on one side of the screen box 3, a driving wheel 14 is provided at the output end of the motor 12, a driven wheel 16 is sleeved on the outer wall of the rotating shaft 15, and a belt 17 is rotatably sleeved on the outer walls of the driven wheel 16 and the driving wheel 14, a rotating shaft 2 19 is provided on one side above the base 1, a driven wheel 20 is sleeved on the outer walls of the rotating shaft 15 and the rotating shaft 2 19, and a belt 21 is sleeved on the outer wall of the driven wheel 20, springs 25 connected to the mounting frame 2 are provided at the four corners of the lower end of the screen box 3, and an impeller 18 rotatably installed inside the pump casing 13 is provided at one end of the rotating shaft 15;

[0030] A through hole 27 is provided inside the mounting frame 2, and a guide rod 26 is provided at the lower end of the screen box 3, which is located inside the spring 25 and slides through the through hole 27;

[0031] A feed port 4 is provided at the upper end of the suction hood 6, and an inclined slot 7 in communication with the screen box 3 is provided at one end of the screen box 3;

[0032] In this embodiment, the sand is input into the screen box 3 through the feed port 4, the large-sized sand is intercepted on the screen 9, the small-sized sand is screened, and the small-sized sand is received by the guide plate 8. The large-sized and small-sized sand after interception and screening flows through the inclined surface of the guide plate 8 and the screen 9, which helps the flow of the screened sand. The intercepted sand is transported to one side separately through the chute 7 to avoid the accumulation of large-sized sand.

[0033] During the screening process, the motor 12 drives the output end to rotate, driving the transmission wheel 14 to rotate, and under the linkage of the belt 17, drives the driven wheel to rotate, and then drives the rotating shaft 15 to rotate, and the impeller 18 rotates inside the pump housing 13, thereby generating a negative pressure airflow for dust suppression, and at the same time drives the driven wheel 20 to rotate through the rotating shaft 15, and the driven wheel 20 drives the rotating shaft 2 19 to rotate through the linkage of the belt 21, and the rotating shaft 15 and the rotating shaft 2 19 drive the cam to rotate, and the cam drives the ball 24 to squeeze the side plate 23, thereby applying pressure to the spring 25, and the spring 25 is forced to shrink. When the spring 25 loses the squeezing force, it drives the spring 25 to shake, thereby realizing the shaking of the screen 9;

[0034] The same motor 12 drives the generation of suction force and shaking force, avoiding additional energy consumption, improving energy utilization efficiency, and reducing system complexity and occupied space.

[0035] Embodiment 2:

[0036] A sand screening device for construction, comprising a base 1, a mounting frame 2, a screen box 3, a collecting box 5, a motor 12, a pump casing 13 and a rotating shaft 15, wherein the upper end of the base 1 is provided with a mounting frame 2, the upper end of the mounting frame 2 is provided with a screen box 3, a screen mesh 9 is provided inside the screen box 3, a side plate 23 is provided on one side of the screen box 3, a driving wheel 14 is provided at the output end of the motor 12, a driven wheel 16 is sleeved on the outer wall of the rotating shaft 15, and a belt 17 is rotatably sleeved on the outer walls of the driven wheel 16 and the driving wheel 14, a rotating shaft 2 19 is provided on one side above the base 1, a driven wheel 20 is sleeved on the outer walls of the rotating shaft 15 and the rotating shaft 2 19, and a belt 21 is sleeved on the outer wall of the driven wheel 20, springs 25 connected to the mounting frame 2 are provided at the four corners of the lower end of the screen box 3, and an impeller 18 rotatably installed inside the pump casing 13 is provided at one end of the rotating shaft 15;

[0037] A through hole 27 is provided inside the mounting frame 2, and a guide rod 26 is provided at the lower end of the screen box 3, which is located inside the spring 25 and slides through the through hole 27;

[0038] A feed port 4 is provided at the upper end of the suction hood 6, and an inclined slot 7 in communication with the screen box 3 is provided at one end of the screen box 3;

[0039] The sand is input into the screen box 3 through the feed port 4, the large-sized sand is intercepted on the screen 9, the small-sized sand is screened, and the small-sized sand is received by the guide plate 8. The large-sized and small-sized sand after interception and screening flows through the inclined surface of the guide plate 8 and the screen 9, which helps the flow of the screened sand. The intercepted sand is transported to one side through the chute 7 to avoid the accumulation of large-sized sand.

[0040] During the screening process, the motor 12 drives the output end to rotate, driving the transmission wheel 14 to rotate, and under the linkage of the belt 17, drives the driven wheel to rotate, and then drives the rotating shaft 15 to rotate, and the impeller 18 rotates inside the pump housing 13, thereby generating a negative pressure airflow for dust suppression, and at the same time drives the driven wheel 20 to rotate through the rotating shaft 15, and the driven wheel 20 drives the rotating shaft 2 19 to rotate through the linkage of the belt 21, and the rotating shaft 15 and the rotating shaft 2 19 drive the cam to rotate, and the cam drives the ball 24 to squeeze the side plate 23, thereby applying pressure to the spring 25, and the spring 25 is forced to shrink. When the spring 25 loses the squeezing force, it drives the spring 25 to shake, thereby realizing the shaking of the screen 9;

[0041] The same motor 12 drives the generation of suction force and shaking force, avoiding additional energy consumption, improving energy utilization efficiency, reducing system complexity and occupied space, and using the suction and vibration equipment at the same time through the linkage structure, which makes the operation simpler and more convenient, reduces the operating difficulty of the operator, and improves production efficiency. Since the same motor 12 is shared, the two structures can operate in a better synchronized manner, which improves the overall working stability, ensures the smooth operation of the equipment, and reduces the number of operable parts and connection points. The linkage structure can effectively reduce the failure rate of the equipment and extend the life of the equipment. By integrating the driving sources of the suction structure and the sand screening vibration structure into the same motor 12 and using them simultaneously through the linkage structure, not only the overall performance of the system is improved, but also energy waste and resource consumption are reduced. It is an improvement plan with higher efficiency, lower cost and easier operation.

[0042] The suction end of the pump housing 13 is provided with a suction pipe penetrating the collection box 5, and the collection box 5 is provided with a filter cover 28 located on one side of the suction pipe;

[0043] The lower end of the screen box 3 is open, and a suction hood 6 is provided at the upper end of the screen box 3;

[0044] A connecting pipe is installed between the suction hood 6 and the collection box 5. A discharge port 29 is provided at the lower end of the collection box 5. A control valve is provided inside the discharge port 29.

[0045] A bearing bracket 10 is provided at one end of the collection box 5, and the output end of the motor 12 is rotatably mounted inside the bearing bracket 10;

[0046] In this embodiment, during the sand screening process, when the screen 9 screens the sand, the dust on the inner wall will escape into the environment due to the shaking of the sand. The escaped dust is intercepted by the suction hood 6, and the sand is prevented from being ejected to the outside. The suction force sucks the dust inside the screen through the connecting pipe, and the sucked dust enters the collection box 5 for collection.

[0047] Embodiment three:

[0048] A sand screening device for construction, comprising a base 1, a mounting frame 2, a screen box 3, a collecting box 5, a motor 12, a pump casing 13 and a rotating shaft 15, wherein the upper end of the base 1 is provided with a mounting frame 2, the upper end of the mounting frame 2 is provided with a screen box 3, a screen mesh 9 is provided inside the screen box 3, a side plate 23 is provided on one side of the screen box 3, a driving wheel 14 is provided at the output end of the motor 12, a driven wheel 16 is sleeved on the outer wall of the rotating shaft 15, and a belt 17 is rotatably sleeved on the outer walls of the driven wheel 16 and the driving wheel 14, a rotating shaft 2 19 is provided on one side above the base 1, a driven wheel 20 is sleeved on the outer walls of the rotating shaft 15 and the rotating shaft 2 19, and a belt 21 is sleeved on the outer wall of the driven wheel 20, springs 25 connected to the mounting frame 2 are provided at the four corners of the lower end of the screen box 3, and an impeller 18 rotatably installed inside the pump casing 13 is provided at one end of the rotating shaft 15;

[0049] A through hole 27 is provided inside the mounting frame 2, and a guide rod 26 is provided at the lower end of the screen box 3, which is located inside the spring 25 and slides through the through hole 27;

[0050] A feed port 4 is provided at the upper end of the suction hood 6, and an inclined slot 7 in communication with the screen box 3 is provided at one end of the screen box 3;

[0051] The sand is input into the screen box 3 through the feed port 4, the large-sized sand is intercepted on the screen 9, the small-sized sand is screened, and the small-sized sand is received by the guide plate 8. The large-sized and small-sized sand after interception and screening flows through the inclined surface of the guide plate 8 and the screen 9, which helps the flow of the screened sand. The intercepted sand is transported to one side through the chute 7 to avoid the accumulation of large-sized sand.

[0052] During the screening process, the motor 12 drives the output end to rotate, driving the transmission wheel 14 to rotate, and under the linkage of the belt 17, drives the driven wheel to rotate, and then drives the rotating shaft 15 to rotate, and the impeller 18 rotates inside the pump housing 13, thereby generating a negative pressure airflow for dust suppression, and at the same time drives the driven wheel 20 to rotate through the rotating shaft 15, and the driven wheel 20 drives the rotating shaft 2 19 to rotate through the linkage of the belt 21, and the rotating shaft 15 and the rotating shaft 2 19 drive the cam to rotate, and the cam drives the ball 24 to squeeze the side plate 23, thereby applying pressure to the spring 25, and the spring 25 is forced to shrink. When the spring 25 loses the squeezing force, it drives the spring 25 to shake, thereby realizing the shaking of the screen 9;

[0053] The same motor 12 drives the generation of suction force and shaking force, avoiding additional energy consumption, improving energy utilization efficiency, reducing system complexity and occupied space, and using the suction and vibration equipment at the same time through the linkage structure, which makes the operation simpler and more convenient, reduces the operating difficulty of the operator, and improves production efficiency. Since the same motor 12 is shared, the two structures can operate in a better synchronized manner, which improves the overall working stability, ensures the smooth operation of the equipment, and reduces the number of operable parts and connection points. The linkage structure can effectively reduce the failure rate of the equipment and extend the life of the equipment. By integrating the driving sources of the suction structure and the sand screening vibration structure into the same motor 12 and using them simultaneously through the linkage structure, not only the overall performance of the system is improved, but also energy waste and resource consumption are reduced. It is an improvement plan with higher efficiency, lower cost and easier operation.

[0054] The suction end of the pump housing 13 is provided with a suction pipe penetrating the collection box 5, and the collection box 5 is provided with a filter cover 28 located on one side of the suction pipe;

[0055] The lower end of the screen box 3 is open, and a suction hood 6 is provided at the upper end of the screen box 3;

[0056] A connecting pipe is installed between the suction hood 6 and the collection box 5. A discharge port 29 is provided at the lower end of the collection box 5. A control valve is provided inside the discharge port 29.

[0057] A bearing bracket 10 is provided at one end of the collection box 5, and the output end of the motor 12 is rotatably mounted inside the bearing bracket 10;

[0058] During the sand screening process, when the screen 9 screens the sand, the dust on the inner wall will escape into the environment due to the shaking of the sand. The dust is intercepted by the suction hood 6, and the sand is prevented from being ejected to the outside. The suction force sucks the dust inside the screen through the connecting pipe, and the sucked dust enters the collection box 5 for collection;

[0059] It effectively prevents the particles on the inner wall from escaping to the outside, reduces the dust content in the air, reduces environmental pollution, helps maintain a clean and sanitary construction site, meets environmental protection requirements, improves the working environment of operators, avoids sand from being ejected to the outside, reduces the risk of injury to operators and equipment by sand, improves work safety, ensures the personal safety of operators and the normal operation of equipment, directly extracts the dust inside the screen material through the suction hood 6 and the connecting pipe, improves the accuracy and efficiency of the screening process, ensures the screening accuracy and material quality, effectively removes fine impurities, and improves the quality standards of products. The design of the dust extraction device makes cleaning and maintenance easier and more convenient, reduces the time and difficulty of cleaning and maintenance, and improves the operability and reliability of the equipment.

[0060] The upper end of the base 1 is provided with a symmetrically distributed bearing bracket 2 11, and the rotating shaft 15 and the rotating shaft 2 19 are both rotatably installed inside the bearing bracket 2 11;

[0061] One end of the rotating shaft 15 and the rotating shaft 2 19 is provided with a protrusion 22, the protrusion 22 is semicircular, and one end of the screen box 3 is provided with a side plate 23;

[0062] The outer wall of the side plate 23 is rotatably mounted with a ball bearing 24, and a guide plate 8 located below the screen box 3 is fixed above the base 1;

[0063] In this embodiment, during the screening of the sand material, the screen 9 is shaken by the spring 25, so that the sand material is shaken. The shaking action causes the sand material to jump on the screen 9, which helps to quickly pass through the sieve holes, thereby improving the screening efficiency and output, and solving the problem of slow speed of traditional static screening. The shaking of the spring 25 can speed up the speed at which the sand material passes through the screen 9, thereby improving the screening efficiency. Through the shaking action, particles of different sizes can be effectively distinguished, thereby improving the screening accuracy and precision, and obtaining a more uniform sorting result, thereby solving the problem of low precision caused by the difficulty in accurately distinguishing particles of different sizes in static screening, thereby solving the problem of low precision caused by the difficulty in accurately distinguishing particles of different sizes in static screening, thereby improving the screening efficiency and output. Particles of a specific size can be easily separated out, and shaking can prevent particles from being fixed in the sieve holes, reduce clogging, keep the sieve 9 unobstructed, and enable continuous screening, thus solving the problem of sieve hole clogging and affecting production. Through the shaking effect, the particles are prevented from being fixed in the holes, and the sieve 9 is kept unobstructed. Compared with static screening, the shaking method can be achieved using simple mechanical principles, saving energy consumption and reducing operating costs, solving the problem of high energy consumption that may exist in other screening methods, and achieving energy-saving goals through simple mechanical principles while ensuring the screening effect.

[0064] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0065] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A sand screening device for construction, comprising a base (1), a mounting frame (2), a screen box (3), a collecting box (5), a motor (12), a pump housing (13) and a rotating shaft (15), characterized in that: The upper end of the base (1) is provided with a mounting frame (2), the upper end of the mounting frame (2) is provided with a screen box (3), a screen (9) is provided inside the screen box (3), a side plate (23) is provided on one side of the screen box (3), a transmission wheel (14) is provided at the output end of the motor (12), a driven wheel (16) is sleeved on the outer wall of the rotating shaft (15), and the driven wheel (16) and the outer wall of the transmission wheel (14) are both rotatably sleeved with a belt ( 17), a rotating shaft 2 (19) is arranged on one side above the base (1), the outer walls of the rotating shaft 1 (15) and the rotating shaft 2 (19) are both sleeved with a driven wheel 2 (20), the outer wall of the driven wheel 2 (20) is sleeved with a belt 2 (21), springs (25) connected to the mounting frame (2) are arranged at the four corners of the lower end of the screen box (3), and an impeller (18) rotatably mounted inside the pump housing (13) is arranged at one end of the rotating shaft 1 (15).

2. A sand screening device for construction according to claim 1, characterized in that: The pump housing (13) has a suction pipe at the suction end thereof which passes through the collecting box (5), and a filter cover (28) located on one side of the suction pipe is arranged inside the collecting box (5).

3. The sand screening equipment for construction according to claim 1, characterized in that: The lower end of the screen box (3) is open, and the upper end of the screen box (3) is provided with a suction hood (6).

4. The sand screening equipment for construction according to claim 3 is characterized in that: A connecting pipe is installed between the suction hood (6) and the collection box (5), a discharge port (29) is provided at the lower end of the collection box (5), and a control valve is provided inside the discharge port (29).

5. The sand screening equipment for construction according to claim 1, characterized in that: A through hole (27) is provided inside the mounting frame (2), and a guide rod (26) is provided at the lower end of the screen box (3) and is located inside the spring (25) and slides through the through hole (27).

6. The sand screening equipment for construction according to claim 1, characterized in that: A bearing bracket (10) is provided at one end of the collection box (5), and the output end of the motor (12) is rotatably mounted inside the bearing bracket (10).

7. The sand screening equipment for construction according to claim 1, characterized in that: The upper end of the base (1) is provided with a symmetrically distributed bearing bracket 2 (11), and the rotating shaft 1 (15) and the rotating shaft 2 (19) are both rotatably mounted inside the bearing bracket 2 (11).

8. The sand screening equipment for construction according to claim 1, characterized in that: One end of the rotating shaft 1 (15) and the rotating shaft 2 (19) is provided with a convex block (22), and the convex block (22) is semicircular. One end of the screen box (3) is provided with a side plate (23).

9. The sand screening equipment for construction according to claim 8, characterized in that: A ball bearing (24) is rotatably mounted on the outer wall of the side plate (23), and a guide plate (8) located below the screen box (3) is fixed above the base (1).

10. The sand screening equipment for construction according to claim 3, characterized in that: A feed port (4) is provided at the upper end of the suction hood (6), and a chute (7) which is inclined and communicates with the screen box (3) is provided at one end of the screen box (3).

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