Turnover type commercial concrete screening device

Abstract

This utility model relates to the field of concrete screening technology, and in particular to a tilting commercial concrete screening device, comprising a tilting screening unit. A left support pipe and a right support shaft are fixedly installed at the left and right ends of the tilting screening unit, respectively. A left support member is installed at the left end of the left support pipe, and a right support member is installed at the right end of the right support shaft. Synchronously lifting and lowering control adjustment components are fixed at the bottom of both the left and right support members. The left end of the left support pipe extends movably to the left side of the left support member. A mesh cover plate is quickly installed on the top of the tilting screening unit. This utility model, by setting screen mesh holes on the sidewalls and bottom of the screening chamber of a large-size screening bin, and setting surface screen holes with the same diameter as the screen mesh holes on the surface of the mesh cover plate, forms an all-round screening channel. Simultaneously, relying on a main drive motor to drive the bin to tilt and move the concrete, it significantly improves the screening efficiency and uniformity of concrete particles.

Description

Technical Field

[0001] This utility model relates to the field of concrete screening technology, and in particular to a tilting commercial concrete screening device. Background Technology

[0002] In the construction of buildings, roads, bridges, and other engineering projects, high-quality concrete screening directly impacts the quality and efficiency of construction. Therefore, the screening effect, efficiency, and stability of screening devices are crucial. Traditional concrete screening methods often employ fixed inclined screens or single vibrating screen structures. Fixed inclined screens rely on the material's own gravity to slide along the inclined surface of the screen for screening. During the screening process, material tends to accumulate on the screen surface, especially in concrete with slightly higher moisture content or stronger particle viscosity, easily leading to material clogging of the screen holes and incomplete screening.

[0003] While single vibrating screening devices improve material flowability through vibration, the vibration direction is mostly up and down or in a single horizontal direction. The material stays on the screen for a short time, and some particles are discharged before being fully screened. Furthermore, for larger concrete lumps, vibration alone is not enough to effectively break them up, and manual cleaning is still required, which increases labor costs and affects screening efficiency.

[0004] In addition, a sieving device for drying concrete disclosed in patent CN213700702U has a main structure including a sieving box, a support frame, elastic support piles, a transverse support rod, a support bearing, a sieving device, a connecting pile, a sieving motor, a transmission disc, a feed hopper, a discharge port, a connecting seat, and a discharge baffle. It uses crushing and screening teeth to crush concrete blocks stuck on the screening rod to complete the sieving operation.

[0005] However, the above-mentioned screening device has the following drawbacks in actual use of commercial concrete screening: First, the screening direction is unidirectional, resulting in insufficient material screening. This device mainly relies on the forward and backward movement of the connecting piles to drive the screening rod to vibrate. The vibration direction is mainly horizontal forward and backward and slightly up and down. The movement trajectory of the commercial concrete material on the screening rod is relatively fixed, which can only achieve unidirectional particle separation, resulting in low screening efficiency and affecting production efficiency.

[0006] Secondly, it lacks a flipping function, making cleaning and maintenance difficult and limiting its applicability. The screening rod and screening box of this device are fixedly connected and do not have the ability to flip as a whole.

[0007] After long-term use, concrete residue is easily left on the surface of the screening rod and on the connecting jaws, vibration grooves and other parts. In particular, the fine particles produced after the crushing screening teeth break up and clump together are easily embedded in the gaps between the parts. Since the screening device cannot be turned over, the staff needs to go deep into the screening box to clean it. This is not only difficult and inefficient, but also poses certain safety hazards.

[0008] Therefore, it is necessary to design a tilting concrete screen with a tilting function that is easy to clean and maintain. Utility Model Content

[0009] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a tilting concrete screening device, comprising a tilting screening unit, with a left support pipe and a right support shaft fixedly installed at the left and right ends of the tilting screening unit, respectively. A left support member is installed at the left end of the left support pipe, and a right support member is installed at the right end of the right support shaft. Synchronous lifting and lowering control adjustment members are fixed at the bottom of both the left and right support members. A main drive motor is fixedly installed on the front side wall of the right support shaft, with the power end of the main drive motor extending movably into the interior of the right support member and used to drive the right support shaft to rotate on a fixed axis. The left end of the left support pipe extends movably to the left side of the left support member. A mesh cover plate is quickly installed on the top of the tilting screening unit, and the interior of the tilting screening unit is used to store concrete to be screened.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the tilting screening unit includes a large-size screening bin arranged horizontally, the large-size screening bin has a screening chamber inside, and several screen mesh holes are provided on the side walls and bottom of the screening chamber. A connecting plate is integrally formed on the top outer edge of the large-size screening bin, and several snap-fit ​​angle irons are fixed at intervals on the side walls of the two long sides of the large-size screening bin. A slot is formed between each snap-fit ​​angle iron and the top of the connecting plate for the mesh cover plate to slide into.

[0011] Based on any of the above technical solutions, a further optimization is made by providing a number of surface sieve holes on the surface of the mesh cover plate.

[0012] Based on any of the above technical solutions, a further optimization is made: the four corners of the large-size screen hopper are all set as rounded curved surfaces.

[0013] Based on any of the above technical solutions, a further optimization is that the aperture of the surface sieve holes is the same as the aperture of the sieve mesh.

[0014] Based on any of the above technical solutions, a further optimization is made as follows: the position adjustment component includes a vertically arranged control electric cylinder, the bottom of the control electric cylinder is fixed with a ground connecting plate, the ground connecting plate is fixed on the ground, and the top of the control electric cylinder is fixed to the bottom of the right support component.

[0015] Based on any of the above technical solutions, a further optimization is made by fixing and welding operating handles to the top of both ends of the mesh cover plate.

[0016] Based on any of the above technical solutions, a further optimization is made: the mating surfaces of the mesh cover plate and the connecting plate, which are mutually engaged, are magnetically secured.

[0017] Based on any of the above technical solutions, a further optimization is made as follows: the right support member includes a right support housing, the bottom of which is fixed to the top of the control electric cylinder. A right mounting cavity is provided inside the right support housing. A driving bevel gear and a driven bevel gear that mesh with each other are installed inside the right mounting cavity. The left end of the driven bevel gear is coaxially fixed to the right end of the right support shaft that extends movably into the right mounting cavity. The driving bevel gear is coaxially fixed to the motor shaft of the main drive motor that extends movably into the right mounting cavity.

[0018] Based on any of the above technical solutions, a further optimization is made as follows: the left support member includes a left support box, and the left end of the left support tube extends movably to the left side of the left support box; The left support pipe is a hollow tube structure with openings at both ends, and its right end is connected to the dual-purpose injection port of the screening chamber. The right end of the left support pipe is connected to an external high-pressure water supply pipeline with a pump or a concrete supply pipeline through a flange. An electromagnetic control valve is installed on the right side of the left support pipe.

[0019] Based on any of the above technical solutions, a further optimization is made by integrally forming a counterweight plate on the bottom outer edge of the large-size screen hopper.

[0020] Additionally, as an optional feature, quick-release screw holes for engaging with quick-release bolts are provided at the four corners of the connecting plate and at the four top corners of the mesh cover.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model forms an all-round screening channel by setting screen mesh holes on the side wall and bottom of the screening chamber of a large-size screening silo, and setting surface screen holes with the same diameter as the screen mesh holes on the surface of the mesh cover plate. At the same time, relying on the main drive motor to drive the silo to rotate and drive the concrete movement, the screening efficiency and screening uniformity of concrete particles are greatly improved, which can meet the batch screening needs of commercial concrete.

[0022] 2. This utility model achieves quick sliding and disassembly of the mesh cover by forming a slot between the snap-fit ​​angle iron and the connecting plate. The operating handles are fixedly welded to the top of both ends of the mesh cover, and the magnetic attraction between the mesh cover and the connecting plate assists in fixing. This not only ensures the stability of the cover during the flipping operation, but also simplifies the disassembly and assembly of the cover. At the same time, the rounded corners of the large-size screening bin eliminate blind spots for cleaning, significantly improving the convenience of equipment operation and maintenance.

[0023] 3. This utility model forms a symmetrical support structure by cooperating with the left support tube and the right support shaft, and the left and right support components. The right support component uses an active bevel gear and a driven bevel gear to achieve efficient power transmission. The bottom of both the left and right support components is equipped with a control electric cylinder with a ground chassis to achieve synchronous lifting and lowering, which effectively disperses the force on the equipment, avoids structural interference and stress concentration, and ensures the structural stability of the equipment during static and flipping operations.

[0024] 4. This utility model, through the hollow structure of the left support pipe and the design of the dual-purpose spray port connected to the screening chamber, can be switched with the flange to connect to the high-pressure concrete supply pipeline with pump or the water supply pipeline. Combined with the electromagnetic control valve, it can achieve precise control of the medium delivery. At the same time, the control cylinder can flexibly adjust the height of the equipment, so that the equipment can not only complete concrete screening, but also clean the screening chamber. It can also be adapted to receiving equipment of different heights, and has strong functional adaptability. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0027] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0028] Figure 3 This is a top view of a partial internal structure of the present invention.

[0029] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the present invention after the mesh cover plate has been removed.

[0030] In the diagram: 1. Left support pipe; 2. Right support shaft; 3. Main drive motor; 4. Mesh cover plate; 5. Large-size screen hopper; 6. Screening chamber; 7. Screen mesh; 8. Connecting plate; 9. Clip-on angle iron; 10. Slot; 11. Surface screen holes; 12. Rounded corner curved surface; 13. Control cylinder; 14. Connecting chassis; 15. Operating handle; 16. Right support box; 17. Right mounting cavity; 18. Driving bevel gear; 19. Driven bevel gear; 20. Left support box; 21. Dual-purpose spray nozzle; 22. Flange; 23. Electromagnetic control valve; 24. Counterweight plate. Detailed Implementation

[0031] The embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of the present utility model, and are therefore merely examples and should not be construed as limiting the scope of protection of the present utility model. The specific structure of the present utility model is as follows: Figures 1-4 As shown in the image.

[0032] Example 1: A tilting concrete screening device includes a tilting screening unit. A left support pipe 1 and a right support shaft 2 are fixedly installed at the left and right ends of the tilting screening unit, respectively. A left support member is installed at the left end of the left support pipe 1, and a right support member is installed at the right end of the right support shaft 2. Synchronous lifting control adjustment members are fixed at the bottom of the left support member and the right support member. A main drive motor 3 is fixedly installed on the front side wall of the right support shaft 2. The power end of the main drive motor 3 extends movably into the interior of the right support member and is used to drive the right support shaft 2 to rotate on a fixed axis. The left end of the left support pipe 1 extends movably to the left side of the left support member. A mesh cover plate 4 is quickly installed on the top of the tilting screening unit. The interior of the tilting screening unit is used to store concrete to be screened.

[0033] This utility model discloses a tilting concrete screening device with a tilting screening unit as the concrete storage structure. Its left and right ends are supported by a fixedly installed left support pipe 1 and right support shaft 2, respectively. A left support component is installed on the left end of the left support pipe 1, and a right support component is installed on the right end of the right support shaft 2, forming a symmetrical support structure. Synchronous lifting and lowering control adjustment components at the bottom of the left and right support components can adjust the height of the entire device, ensuring the tilting screening unit is at a level suitable for screening requirements. The main drive motor 3 on the front side wall of the right support shaft 2 drives the right support shaft 2 to rotate on a fixed axis through its power end extending into the right support component. When the right support shaft 2 rotates, it drives the tilting screening unit to rotate synchronously, achieving the tilting action. A quick-release mesh cover 4 on the top of the tilting screening unit can be closed before screening to prevent concrete splashing, and can be removed after screening for easy cleaning or material replenishment. The internal space of the tilting screening unit is used to store the concrete to be screened, providing a material bearing base for screening operations.

[0034] Based on any of the above technical solutions, a further optimization is made as follows: the tilting screening unit includes a large-size screening bin 5 arranged horizontally, the large-size screening bin 5 has a screening chamber 6 inside, and a number of screen mesh holes 7 are provided on the side walls and bottom of the screening chamber 6. A connecting plate part 8 is integrally formed on the top outer edge of the large-size screening bin 5. A number of snap-fit ​​angle irons 9 are fixed at intervals on the side walls of the two long sides of the large-size screening bin 5. A slot 10 is formed between each snap-fit ​​angle iron 9 and the top of the connecting plate part 8 for the mesh cover plate 4 to slide into.

[0035] The tilting screening unit uses a large-sized screening bin 5 set horizontally as the concrete bearing component. The screening chamber 6 inside is a space to hold the dry concrete to be screened. After the dry concrete to be screened is fed into the screening chamber 6 by the external feeding equipment, it achieves initial uniform distribution by relying on the horizontal posture of the large-sized screening bin 5.

[0036] During the screening process, when the external drive structure drives the large-size screening bin 5 to rotate, the dry concrete in the screening chamber 6 moves with the rotation of the bin. During this process, dry concrete particles that meet the particle size requirements will be discharged through several screen mesh holes 7 opened on the side wall and bottom of the screening chamber 6, completing the screening. Larger particles or lumps that do not meet the particle size requirements will remain in the screening chamber 6. After the screening operation is completed, the mesh cover plate 4 will be opened and the screening chamber 6 will be rotated downwards and collected using the temporary receiving container placed at the bottom.

[0037] The side walls and bottom of the screening chamber 6 are provided with several screen mesh holes 7 to form a screening channel. The size of the holes determines the particle size of the concrete particles that can pass through. When the large-size screening bin 5 is driven by the main drive motor 3 to rotate, the concrete in the screening chamber 6 is displaced and collides with the bin as it rotates. Concrete particles with a particle size smaller than the screen mesh holes 7 are discharged through the mesh holes under the action of gravity and inertia, thus realizing the screening operation.

[0038] The connecting plate 8, integrally formed on the outer edge of the top of the large-size screening bin 5, serves as the top connection base and structural reinforcement component. It cooperates with the snap-fit ​​angle irons 9 fixed at intervals on the two long side walls to form a slot 10 for the mesh cover plate 4 to slide into. The mesh cover plate 4 can be quickly installed by sliding along the length of the slot 10. After installation, the slot 10 provides vertical and horizontal limit for the cover plate, preventing it from falling off during bin rotation.

[0039] Based on any of the above technical solutions, a further optimization is made by providing a plurality of surface sieve holes 11 on the surface of the mesh cover plate 4.

[0040] Based on any of the above technical solutions, a further optimization is that the aperture of the surface sieve hole 11 is the same as the aperture of the sieve mesh 7.

[0041] Based on any of the above technical solutions, a further optimization is made: the four corners of the large-size screen hopper 5 are all set with rounded curved surfaces 12 for easy cleaning.

[0042] The four corners of the large-size screening bin 5 are designed with rounded curved surfaces 12 to replace the traditional right-angle structure, so that the corners inside the screening chamber 6 form a smooth transition curved surface shape.

[0043] During concrete screening, as concrete particles tumble within the screening chamber 6, they do not accumulate in the corners due to the dead angles created by the right-angle structure. During cleaning (whether via the left support pipe 1 supplying cleaning fluid or manual cleaning), the rounded curved surface 12 eliminates the cleaning blind spots of the right-angle structure. The cleaning fluid flows smoothly along the curved surface, effectively flushing the corners and allowing cleaning tools (such as brushes) to easily adhere to the surface and wipe away residual concrete clumps, dust, and other impurities. This structural design fundamentally solves the problem of material accumulation and difficulty in cleaning at right-angled corners, ensuring a clean and residue-free interior of the screening chamber 6.

[0044] Based on any of the above technical solutions, a further optimization is made as follows: the control position adjustment component includes a vertically arranged control electric cylinder 13, the bottom of the control electric cylinder 13 is fixed with a ground connecting plate 14, the ground connecting plate 14 is fixed on the ground, and the top of the control electric cylinder 13 is fixed to the bottom of the right support component.

[0045] The control cylinder 13 uses an internal motor to drive a lead screw and nut mechanism to extend and retract, thereby causing the connected components to move up and down. The bottom of the control cylinder 13 is fixedly connected to the ground via a connecting plate 14. The connecting plate 14 increases the contact area between the control cylinder 13 and the ground, distributing the pressure of the overall weight of the equipment on the ground. Simultaneously, the connecting plate 14 is fixed to the ground with bolts and other fasteners, ensuring that the control cylinder 13 will not shift or tip over during operation. The top of the control cylinder 13 is fixedly connected to the bottom of the right support member. When the control cylinder 13 extends or retracts, it directly drives the right support member to rise and fall. Since the bottom of the left support member also has the same position adjustment component, and the control cylinders 13 on both sides extend and retract synchronously, the entire tilting screen unit and the left and right support structures move smoothly up and down, ultimately achieving the adjustment of the horizontal height of the tilting screen unit.

[0046] Based on any of the above technical solutions, a further optimization is made by fixing and welding operating handles 15 to the top of both ends of the mesh cover plate 4 for easy disassembly.

[0047] After the operating handles 15 are fixedly welded to the top of both ends of the mesh cover plate 4, the operator can apply a pushing or pulling force along the length of the slot 10 by holding the operating handles 15 when it is necessary to disassemble or install the mesh cover plate 4.

[0048] Since the operating handle 15 and the mesh cover plate 4 are fixedly welded together, they form a rigid whole. The force applied by the operator can be directly transmitted to the mesh cover plate 4, driving the mesh cover plate 4 to slide along the slot 10 on the large-size screen bin 5, thereby realizing the quick disassembly or installation of the mesh cover plate 4.

[0049] Compared to a handleless structure, the operating handle 15 provides the operator with a clear and effortless point of force application, avoiding the difficulty of disassembly and assembly caused by the smooth surface of the mesh cover plate 4 or the lack of a point of force application. Especially when the friction of the mesh cover plate 4 increases due to the adhesion of concrete dust, the operating handle 15 can effectively reduce the difficulty of force application and ensure smooth disassembly and assembly.

[0050] Based on any of the above technical solutions, a further optimization is made: the mating surfaces of the mesh cover plate 4 and the connecting plate 8, which are mutually engaged, are magnetically fixed to prevent shaking.

[0051] At the mating surface where the mesh cover plate 4 and the connecting plate part 8 engage with each other, a pre-set magnetic attraction is used. When the mesh cover plate 4 slides along the slot 10 to the fully engaged position, the magnetic attraction at the mating surface generates an attractive force, making the mesh cover plate 4 and the connecting plate part 8 fit tightly together. When the flipping screen unit performs the flipping operation, the magnetic attraction force can counteract the centrifugal force and vibration impact force generated by the flipping of the silo body, preventing the mesh cover plate 4 from moving laterally or loosening vertically in the slot 10, ensuring that it always maintains a stable assembly state, and preventing the risk of concrete splashing or cover plate falling off due to shaking.

[0052] Based on any of the above technical solutions, a further optimization is made as follows: the right support member includes a right support housing 16, the bottom of which is fixed to the top of the control cylinder 13. A right mounting cavity 17 is provided inside the right support housing 16. A driving bevel gear 18 and a driven bevel gear 19 that mesh with each other are installed inside the right mounting cavity 17. The left end of the driven bevel gear 19 is coaxially fixed to the right end of the right support shaft 2 that extends movably into the right mounting cavity 17. The driving bevel gear 18 is coaxially fixed to the motor shaft of the main drive motor 3 that extends movably into the right mounting cavity 17.

[0053] When the main drive motor 3 starts, the motor shaft drives the driving bevel gear 18 to rotate synchronously. Since the driving bevel gear 18 and the driven bevel gear 19 mesh with each other, the rotational motion of the driving bevel gear 18 is transmitted to the driven bevel gear 19 through gear meshing, causing the driven bevel gear 19 to rotate. The left end of the driven bevel gear 19 is coaxially fixedly connected to the right end of the right support shaft 2. Therefore, the rotation of the driven bevel gear 19 directly drives the right support shaft 2 to rotate around its own axis, ultimately driving the tilting screen unit fixedly connected to the right support shaft 2 to achieve the tilting action. The closed structure of the right mounting cavity 17 ensures that the gear transmission process is not affected by external concrete dust, sand and gravel and other impurities. At the same time, the right support box 16 provides rigid support for the entire transmission system, ensuring the stability of gear meshing.

[0054] Example 2: Compared with Example 1, this example also includes the following technical features: Based on any of the above technical solutions, a further optimization is made as follows: the left support member includes a left support box 20, and the left end of the left support tube 1 extends movably to the left side of the left support box 20; The left support pipe 1 is a hollow pipe structure with openings at both ends, and its right end is connected to the dual-purpose injection port 21 of the screening chamber 6. The right end of the left support pipe 1 is connected to an external high-pressure water supply pipeline or concrete supply pipeline with a pump through a flange 22. An electromagnetic control valve 23 is installed on the right side of the left support pipe 1.

[0055] The left support pipe 1 adopts a hollow pipe structure with openings at both ends to form a medium conveying channel. Its right end is connected to the dual-purpose injection port 21 of the screening chamber 6, establishing a medium transmission path between the external pipeline and the screening chamber 6.

[0056] During the concrete conveying stage, the right end of the left support pipe 1 is connected to the external high-pressure concrete supply pipeline with a pump via flange 22. The electromagnetic control valve 23 is opened, and the concrete flows along the left support pipe 1 under the pressure of the pump body, entering the screening chamber 6 through the dual-purpose spray nozzle 21. During the cleaning stage, the switching flange 22 is connected to the external high-pressure water supply pipeline with a pump, and the electromagnetic control valve 23 is opened. The high-pressure cleaning fluid enters the screening chamber 6 through the left support pipe 1 and the dual-purpose spray nozzle 21 to flush the interior. When not in operation, the electromagnetic control valve 23 is closed to block the medium conveying channel and prevent residual medium from flowing back or external impurities from entering.

[0057] Based on any of the above technical solutions, a further optimization is made by integrally forming a counterweight plate 24 on the bottom outer edge of the large-size screen hopper 5.

[0058] Additionally, as an optional feature, quick-release screw holes for engaging with quick-release bolts are provided at the four corners of the connecting plate portion 8 and at the four top corners of the mesh cover plate 4.

[0059] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. For those skilled in the art, any alternative improvements or transformations made to the implementation of this utility model fall within the protection scope of this utility model.

[0060] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A reverse flow concrete screed comprising: The device includes a tilting screening unit. A left support pipe and a right support shaft are fixedly installed at the left and right ends of the tilting screening unit, respectively. A left support member is installed at the left end of the left support pipe, and a right support member is installed at the right end of the right support shaft. Synchronous lifting and lowering control adjustment components are fixed at the bottom of both the left and right support members. A main drive motor is fixedly installed on the front side wall of the right support shaft. The power end of the main drive motor extends movably into the interior of the right support member and is used to drive the right support shaft to rotate on a fixed axis. The left end of the left support pipe extends movably to the left side of the left support member. A mesh cover plate is quickly installed on the top of the tilting screening unit. The interior of the tilting screening unit is used to store concrete to be screened.

2. A reverse flow concrete screed according to claim 1 wherein: The tilting screening unit includes a large-sized screening bin arranged horizontally. The large-sized screening bin has a screening chamber inside. Several screen mesh holes are provided on the side walls and bottom of the screening chamber. A connecting plate is integrally formed on the top outer edge of the large-sized screening bin. Several snap-fit ​​angle irons are fixed at intervals on the side walls of the two long sides of the large-sized screening bin. A slot is formed between each snap-fit ​​angle iron and the top of the connecting plate for the mesh cover plate to slide into.

3. A reverse flow concrete screed according to claim 2 wherein: A plurality of surface sieve holes are provided on the surface of the mesh cover plate; The four corners of the large-size sieve hopper are all designed with rounded curved surfaces; The aperture of the surface sieve is the same as the aperture of the sieve mesh.

4. A tilting commercial concrete sieve according to claim 3, characterized in that: The position adjustment component includes a vertically arranged control electric cylinder. The bottom of the control electric cylinder is fixed with a ground connecting plate, which is fixed to the ground. The top of the control electric cylinder is fixed to the bottom of the right support component.

5. A tilting commercial concrete sieve according to claim 4, characterized in that: Operating handles are fixedly welded to the top of both ends of the mesh cover plate.

6. A tilting commercial concrete sieve according to claim 5, characterized in that: The mesh cover and the connecting plate are magnetically secured to each other.

7. A tilting commercial concrete sieve according to claim 6, characterized in that: The right support includes a right support housing, the bottom of which is fixed to the top of the control cylinder. A right mounting cavity is provided inside the right support housing. A driving bevel gear and a driven bevel gear meshing with each other are installed inside the right mounting cavity. The left end of the driven bevel gear is coaxially fixed to the right end of the right support shaft that extends into the right mounting cavity. The driving bevel gear is coaxially fixed to the motor shaft of the main drive motor that extends into the right mounting cavity.

8. A tilting commercial concrete sieve according to claim 7, characterized in that: The left support member includes a left support box, and the left end of the left support tube extends movably to the left side of the left support box; The left support pipe is a hollow tube structure with openings at both ends, and its right end is connected to the dual-purpose injection port of the screening chamber. The right end of the left support pipe is connected to an external high-pressure water supply pipeline with a pump or a concrete supply pipeline through a flange. An electromagnetic control valve is installed on the right side of the left support pipe.

9. A tilting commercial concrete sieve according to claim 8, characterized in that: A counterweight plate is integrally formed on the bottom outer edge of the large-size screening hopper.

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