A pneumatically mixed concrete screening apparatus

Abstract

The utility model relates to concrete screening technical field especially, and it is a kind of pneumatic mixed concrete screening equipment, including frame, the top fixed mounting of frame is vibrated screening bin, the top open of vibrated screening bin is set, the inner chamber of vibrated screening bin is installed with the screening piece of horizontal setting of quick release, the periphery of screening piece all movably abuts on the inner chamber side wall of vibrated screening bin, the inner chamber is separated into upper screening cavity and lower bulk cavity by screening piece, the outer side wall of vibrated screening bin on the left side of lower bulk cavity is installed with pneumatic bulk unit, the bottom of vibrated screening bin is installed with a plurality of discharge valve.The utility model combines vibrating screening with pneumatic bulk, effectively improves screening efficiency and the screening, bulk effect of concrete, can handle concrete caking problem, guarantees the quality of discharged concrete.

Description

Technical Field

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

[0002] In the construction process, screening of concrete raw materials is a crucial step in ensuring concrete quality. If large particles or impurities are mixed in the concrete raw materials, it will directly affect the mixing effect of the mixer, leading to a decrease in the homogeneity of the concrete and making it difficult to meet the requirements for construction strength and durability. Therefore, efficient and precise screening equipment is essential for concrete production.

[0003] Traditional concrete raw material screening methods mostly rely on manual screening or simple mechanical vibrating screens. Manual screening is inefficient and the screening accuracy is difficult to guarantee, while mechanical vibrating screens have problems such as high energy consumption, easy clogging, and untimely discharge of large impurities.

[0004] For example, patent document with patent application number CN202221368012.6 discloses a material feeding and screening mechanism for a concrete mixer. Its main structure includes a support frame, a screening box fixedly connected to the support frame, a discharge port at the bottom of the screening box, a fixed screening plate fixed inside, a movable screening plate slidably connected to the fixed screening plate, screening ports on both sides of the screening box, and a reciprocating screw driven by a motor drives a reciprocating nut, which, in conjunction with an elastic component, pushes the movable screening plate to reciprocate, thereby realizing the screening of raw materials and the discharge of large impurities.

[0005] However, the above-mentioned mechanism has the following disadvantages: the drive method relies on motors and mechanical transmission structures, and the mechanical parts are prone to wear and corrosion in the environment of long-term contact with concrete raw materials, resulting in high equipment maintenance frequency and shortened service life. In addition, the response speed of mechanical transmission is limited, making it difficult to flexibly adjust the screening intensity according to the particle size distribution of raw materials.

[0006] Therefore, it is necessary to design a screening device that uses pneumatic drive to disperse and impact concrete particles to screen concrete agglomerates. Utility Model Content

[0007] To solve one of the aforementioned technical problems, the present invention provides the following technical solution: a pneumatically mixed concrete screening device, comprising a frame, a vibrating screen hopper fixedly installed on the top of the frame, the top of the vibrating screen hopper being open, and a horizontally arranged screening component being quickly and easily installed inside the vibrating screen hopper. The screening component is movably abutting against the inner wall of the vibrating screen hopper, dividing the inner cavity into an upper screening chamber and a lower dispersing chamber. A pneumatic dispersing unit is installed on the outer wall of the vibrating screen hopper on the left side of the lower dispersing chamber, and the air outlet of the pneumatic dispersing unit is connected to its interior through a through hole on the left side wall of the lower dispersing chamber. Several discharge valves are installed at the bottom of the vibrating screen hopper.

[0008] Based on any of the above technical solutions, a further optimization is made by installing a vibration motor on the right side wall of the vibrating screen hopper.

[0009] Based on any of the above technical solutions, a further optimization is made as follows: the screening component includes a horizontally arranged rigid screen, the outer sidewall of the rigid screen is movably abutting against the inner sidewall of the inner cavity, a plurality of screen holes are provided on the surface of the rigid screen, the bottom of the rigid screen abuts against the top of each magnetic fixing block, and each magnetic fixing block is fixed to the inner cavity sidewall.

[0010] Based on any of the above technical solutions, a further optimization is made as follows: the pneumatic bulk material unit includes a high-pressure air inlet pipe fixedly connected to the vibrating screen box on the left side of the lower bulk material chamber, a high-pressure air pump is installed at the inlet end of the high-pressure air inlet pipe, a conical feed pipe is installed at the bottom of the high-pressure air pump, and a pressure conveying pipe is connected to the bottom of the conical feed pipe.

[0011] Based on any of the above technical solutions, a further optimization is made: the left end of the pressure transmission pipe is horizontally arranged and a pressure gauge is installed on it.

[0012] Based on any of the above technical solutions, a further optimization is made: the bottom surface of the lower material distribution cavity is a spherical curved surface with a downward concave center.

[0013] Based on any of the above technical solutions, a further optimization is made as follows: a wear-resistant metal protrusion is fixedly installed on the inner wall of the lower material distribution chamber on the right side of the spherical curved surface, and the wear-resistant metal protrusion is positioned facing the outlet end of the high-pressure air inlet pipe.

[0014] Based on any of the above technical solutions, a further optimization is made: the left side of the wear-resistant metal protrusion is set as a spherical curved surface of the protrusion.

[0015] Based on any of the above technical solutions, a further optimization is made: the surface of the spherical surface is set as a smooth surface that has been polished and ground.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model uses a magnetic quick-release screen component design, which facilitates quick disassembly and replacement when the screen component is damaged or needs cleaning, thereby improving the maintenance efficiency of the equipment.

[0018] 2. This utility model divides the inner cavity of the vibrating screen material box into an upper screening chamber and a lower dispersing chamber, with clear functional zoning. The combination of vibrating screening and pneumatic dispersing effectively improves screening efficiency and the screening and dispersing effect on concrete, can deal with the problem of concrete clumping, and ensure the quality of the discharged concrete.

[0019] 3. This utility model utilizes the right side wall of the lower material dispersing chamber and the optimized wear-resistant metal protrusions to perform secondary material dispersing of agglomerated particles, making full use of the internal structure of the equipment, eliminating the need for additional complex material dispersing components, and reducing the manufacturing cost and structural complexity of the equipment.

[0020] 4. The bottom surface of the lower bulk material chamber of this utility model adopts a spherical curved surface with a downward concave center and the surface is polished and ground, which can reduce the flow resistance of concrete, make the concrete flow more smoothly to the discharge valve, improve the discharge efficiency, and at the same time reduce the adhesion of concrete on the chamber wall, making the equipment easier to clean. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0024] Figure 3 This is a partial internal structure diagram of the present invention.

[0025] In the diagram, 1. Frame; 2. Vibrating screen hopper; 3. Rigid screen; 4. High-pressure air pump; 5. Discharge valve; 6. Vibrating motor; 7. Upper screening chamber; 8. Magnetic fixing block; 9. High-pressure air inlet pipe; 10. Lower material distribution chamber; 11. Conical feed pipe; 12. Pressure conveying pipe; 13. Pressure gauge; 14. Wear-resistant metal protrusion; 15. Spherical curved surface. Detailed Implementation

[0026] 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 1-3 As shown in the image.

[0027] Example 1: A pneumatically mixed concrete screening device includes a frame 1. A vibrating screen hopper 2 is fixedly installed on the top of the frame 1. The top of the vibrating screen hopper 2 is open. A horizontally arranged screening component is quickly installed inside the inner cavity of the vibrating screen hopper 2. The screening component is movably abutting against the inner cavity side wall of the vibrating screen hopper 2 on all four sides. The screening component divides the inner cavity into an upper screening chamber 7 and a lower dispersing chamber 10. A pneumatic dispersing unit is installed on the outer side wall of the vibrating screen hopper 2 on the left side of the lower dispersing chamber 10. The air outlet of the pneumatic dispersing unit is connected to the interior of the lower dispersing chamber 10 through a through hole on the left side wall of the lower dispersing chamber 10. Several discharge valves 5 are installed at the bottom of the vibrating screen hopper 2.

[0028] In this invention, the frame 1 serves to support the entire equipment; the vibrating screen hopper 2 is fixed to the top of the frame 1, with an open top for feeding concrete particles to be screened; the screening component divides the inner cavity of the vibrating screen hopper 2 into an upper screening chamber 7 and a lower dispersing chamber 10, and the screening component is quick-release for easy maintenance and replacement; the pneumatic dispersing unit is installed on the left outer wall of the lower dispersing chamber 10, blowing high-pressure airflow into the interior through the side wall through-hole; the discharge valve 5 is installed at the bottom of the vibrating screen hopper 2 for discharging the concrete after screening and dispersing.

[0029] The quick-release screening components allow for rapid disassembly and replacement when damaged or requiring cleaning, improving equipment maintenance efficiency. The vibrating screen's material box 2 is divided into upper and lower chambers; the upper chamber is for screening, and the lower chamber is for dispersing materials, clearly defining functional areas and improving screening efficiency. The pneumatic dispersing unit allows for a second impact dispersing of the screened concrete, solving the problem of concrete clumping.

[0030] The pneumatically mixed concrete screening equipment of this invention operates by feeding sieved concrete particles into the upper screening chamber 7 from the top. After the equipment is started, the vibrating motor 6 of the vibrating screen box 2 vibrates and screens the material. During the screening process, the pneumatic dispersing unit continuously blows high-pressure airflow into the lower dispersing chamber 10, thereby impacting and dispersing the screened concrete again, breaking up small lumps of concrete. The blown-away concrete lumps collide with the right side wall of the lower dispersing chamber 10 and disperse. The dispersed concrete is then quickly discharged along the various discharge valves 5. Specifically, the concrete particles are fed into the upper screening chamber 7 from the top. After the vibrating motor 6 of the vibrating screen box 2 is started, the vibrating screen box 2 vibrates, causing the screening components to vibrate, thus performing preliminary screening of the concrete particles. Particles that meet the screen aperture size pass through the screening components and enter the lower dispersing chamber 10. At this time, the pneumatic material dispersing unit continuously blows high-pressure airflow into the lower material dispersing chamber 10, impacting the concrete entering the lower material dispersing chamber 10, blowing away small clumps of concrete, and the blown clumps of concrete impact the right side wall of the lower material dispersing chamber 10 for further dispersal, and finally the dispersed concrete is discharged through the discharge valve 5 at the bottom.

[0031] The combination of vibrating screen and pneumatic material handling improves the screening and dispersing effect of concrete, effectively addressing the problem of caking and ensuring the quality of the discharged concrete. The lower dispersing chamber 10 utilizes the right side wall to further disperse caking particles, making full use of the equipment's internal structure without requiring additional complex dispersing components.

[0032] Based on any of the above technical solutions, a further optimization is made by installing a vibration motor 6 on the right side wall of the vibrating screen hopper 2.

[0033] The vibrating motor 6 is installed on the right side wall of the vibrating screen hopper 2. Upon startup, it generates vibration force, which is transmitted through the hopper wall to the entire vibrating screen hopper 2, causing the hopper and its internal screening components to vibrate, thereby screening the concrete particles. The right-side installation facilitates the installation, maintenance, and repair of the motor. The vibrating motor 6 provides the vibration power for the screening process and is a key component for achieving the initial screening of concrete particles.

[0034] Based on any of the above technical solutions, a further optimization is made as follows: the screening component includes a horizontally arranged rigid screen 3, the outer sidewall of the rigid screen 3 is movably abutted against the inner sidewall of the inner cavity, a plurality of screen holes are provided on the surface of the rigid screen 3, the bottom of the rigid screen 3 is abutted against the top of each magnetic fixing block 8, and each magnetic fixing block 8 is fixed to the inner cavity sidewall.

[0035] The rigid screen 3 is horizontally set inside the vibrating screen box 2, with its outer side wall in movable contact with the inner side wall of the inner cavity to ensure the stability of the screen during vibration and not to hinder its vibration; the magnetic fixing block 8 is fixed to the inner side wall of the cavity to support the bottom of the rigid screen 3; the concrete particles are on the screen, and through the vibration of the screen, the particles that meet the size of the screen holes pass through the screen holes and enter the lower material distribution chamber 10 to complete the screening process.

[0036] The rigid screen 3 can withstand the impact and vibration of concrete particles, ensuring the service life of the screen. The movable abutment and magnetic fixing blocks 8 provide support, ensuring stable installation of the screen while allowing it to vibrate fully, improving the screening effect. The size of the screen openings determines the particle size standard for screening.

[0037] Based on any of the above technical solutions, a further optimization is made as follows: the pneumatic bulk material unit includes a high-pressure air inlet pipe 9 fixedly connected to the vibrating screen box 2 on the left side of the lower bulk material chamber 10, a high-pressure air pump 4 is installed at the inlet end of the high-pressure air inlet pipe 9, a conical feed pipe 11 is installed at the bottom of the high-pressure air pump 4, and a pressure conveying pipe 12 is connected to the bottom of the conical feed pipe 11.

[0038] A high-pressure air pump 4 is installed at the inlet end of the high-pressure air inlet pipe 9. After starting, it compresses air and sends it into the lower material distribution chamber 10 through the high-pressure air inlet pipe 9. A conical feed pipe 11 is connected to the bottom of the high-pressure air pump 4, which helps guide the gas smoothly into the pressure delivery pipe 12. The pressure delivery pipe 12 stably delivers the high-pressure gas to the high-pressure air inlet pipe 9, and finally into the lower material distribution chamber 10 to impact and distribute the concrete. The high-pressure air pump 4 provides high-pressure airflow and is the core power component for realizing pneumatic material distribution. The design of the conical feed pipe 11 allows the gas to enter the pressure delivery pipe 12 more smoothly, reducing gas flow resistance and improving air supply efficiency. The pressure delivery pipe 12 ensures stable delivery of high-pressure gas and ensures the stability of the material distribution effect.

[0039] Based on any of the above technical solutions, a further optimization is made: the left end of the pressure transmission pipe 12 is horizontally arranged and a pressure gauge 13 is installed on it.

[0040] Pressure gauge 13 is installed at the left end of the horizontally positioned pressure delivery pipe 12 to monitor the gas pressure inside the pipe 12 in real time. Operators can observe the reading on pressure gauge 13 to understand the pressure of the high-pressure gas and make adjustments to equipment such as the high-pressure air pump 4.

[0041] Example 2: Compared with Example 1, this example also includes the following technical features:

[0042] Based on any of the above technical solutions, a further optimization is made: the bottom surface of the lower material distribution cavity 10 is a spherical curved surface 15 with the center concave downward.

[0043] The bottom surface of the lower material distribution chamber 10 is designed as a spherical curved surface 15 with a downward concave center. When concrete clumps are blown away by the high-pressure airflow, their movement trajectory on the spherical curved surface 15 becomes more complex, increasing the chances of collisions between particles and between particles and the chamber wall, which helps to further break up the clumps. Simultaneously, during discharge, the concrete, guided by gravity and the spherical curved surface 15, flows more concentratedly towards the discharge valve 5. Specifically, the spherical curved surface 15 design enhances the material distribution effect, improves the degree of concrete dispersion, and helps to improve the quality of the discharged concrete. In terms of discharge, it allows the concrete to flow more smoothly towards the discharge valve 5, improving discharge efficiency.

[0044] This spherical curved surface 15 design has advantages in dealing with concrete raw materials with different fluidity. For concrete with poor fluidity, the spherical curved surface 15 can utilize gravity and airflow to better guide the flow and dispersion of concrete, achieving more efficient material distribution and discharge under the same equipment conditions compared to a flat bottom design.

[0045] Based on any of the above technical solutions, a further optimization is made as follows: a wear-resistant metal protrusion 14 is fixedly installed on the inner wall of the lower material distribution chamber 10 on the right side of the spherical curved surface 15, and the wear-resistant metal protrusion 14 is arranged facing the outlet end of the high-pressure air inlet pipe 9.

[0046] The wear-resistant metal protrusion 14 is fixed to the right side of the inner wall of the lower material distribution chamber 10 and faces the outlet end of the high-pressure air inlet pipe 9. When the high-pressure airflow blows the concrete clump particles toward the right side wall, the particles first hit the wear-resistant metal protrusion 14. Due to the high hardness of the wear-resistant metal protrusion 14, it can effectively break up the clump particles, while itself being less prone to wear.

[0047] Based on any of the above technical solutions, a further optimization is made: the left side of the wear-resistant metal protrusion 14 is set as a protruding spherical curved surface 15.

[0048] The left side of the wear-resistant metal protrusion 14 is designed as a raised spherical curved surface 15. When concrete clump particles collide, the spherical curved surface 15 can change the direction of particle movement, causing it to bounce in different directions, increasing the probability of collision between particles and surrounding concrete and cavity walls, and further improving the material distribution effect.

[0049] Based on any of the above technical solutions, a further optimization is made: the surface of the spherical curved surface 15 is set as a smooth curved surface that has been polished and ground.

[0050] The spherical curved surface 15 is polished and ground to form a smooth curved surface. During the concrete flow and discharge process, it can reduce the friction between the concrete and the spherical curved surface 15, allowing the concrete to move more smoothly in the lower material distribution chamber 10, improving the discharge efficiency. At the same time, it also reduces the adhesion of concrete on the chamber wall, making it easier to clean the equipment.

[0051] Work process:

[0052] Prepare the concrete granules to be screened, confirm that all parts of the equipment are securely installed, check that the high-pressure air pump 4, vibration motor 6 and other power equipment are in normal standby mode, and ensure that the discharge valve 5 is closed to prevent material leakage during the feeding process.

[0053] Concrete granules are fed into the upper screening chamber 7 through the open opening at the top of the vibrating screen hopper 2. The open design at the top of the vibrating screen hopper 2 makes feeding convenient and efficient, allowing for the rapid input of large quantities of concrete granules into the equipment.

[0054] The vibrating motor 6, installed on the right side wall of the vibrating screen hopper 2, is started. The vibrating motor 6 generates vibration force, which is transmitted through the hopper wall to the entire vibrating screen hopper 2, causing the horizontally positioned screening component (rigid screen 3) to vibrate. Concrete particles vibrate on the screening component; particles matching the size of the screen holes pass through the holes and fall into the lower material distribution chamber 10, completing the initial screening. The structure of the screening component, which movably abuts against the inner wall of the vibrating screen hopper 2 and is supported by a fixed block at the bottom, ensures the stability of the screening component during vibration without hindering its effective vibration, thus ensuring the screening effect.

[0055] While the vibrating screen is in operation, the high-pressure air pump 4 is started. The high-pressure air pump 4 compresses air and sends the high-pressure airflow into the lower material distribution chamber 10 through the pneumatic material distribution unit composed of the high-pressure air inlet pipe 9, the conical feed pipe 11, and the pressure conveying pipe 12. The high-pressure airflow impacts the concrete entering the lower material distribution chamber 10, blowing away small clumps of concrete. Under the action of the high-pressure airflow, the blown concrete clumps collide with the right side wall of the lower material distribution chamber 10, undergoing secondary material distribution. The spherical curved surface 15 on the bottom of the lower material distribution chamber 10 makes the movement trajectory of the concrete clump particles complex, increases the chance of collision, and further enhances the material distribution effect. The wear-resistant metal protrusion 14 on the right side wall facing the outlet end of the high-pressure air inlet pipe 9 has high hardness and can effectively break up the impacting clump particles, and is not easily worn. The spherical curved surface 15 on the left side of the wear-resistant metal protrusion 14 changes the direction of particle rebound and improves the uniformity of material distribution. The smooth surface of the spherical curved surface 15, which is polished and ground, reduces the flow resistance of concrete, improves the discharge efficiency, and at the same time reduces concrete adhesion, making it easier to clean the equipment.

[0056] After passing through the vibrating screen and pneumatic bulk material, the concrete, guided by gravity and the spherical curved surface 15 of the lower bulk material chamber 10, flows concentratedly to the discharge valve 5 at the bottom of the vibrating screen material box 2. Opening the discharge valve 5 allows the dispersed concrete to be quickly discharged from the equipment, completing the entire screening process.

[0057] 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.

[0058] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A pneumatically mixed concrete screening apparatus, characterized by: The device includes a frame, on the top of which a vibrating screen hopper is fixedly mounted. The top of the vibrating screen hopper is open. A horizontally arranged screening component is quickly installed inside the vibrating screen hopper. The screening component is movably abutting against the inner wall of the vibrating screen hopper. The screening component divides the inner cavity into an upper screening chamber and a lower dispersing chamber. A pneumatic dispersing unit is installed on the outer wall of the vibrating screen hopper on the left side of the lower dispersing chamber. The air outlet of the pneumatic dispersing unit is connected to the interior of the lower dispersing chamber through a through hole on the left side wall of the lower dispersing chamber. Several discharge valves are installed at the bottom of the vibrating screen hopper.

2. A pneumatically mixed concrete screening apparatus as claimed in claim 1, characterised in that: A vibrating motor is installed on the right side wall of the vibrating screen hopper.

3. A pneumatically mixed concrete screening apparatus as claimed in claim 2, wherein: The screening component includes a horizontally arranged rigid screen, the outer sidewalls of which are movably abutted against the inner sidewall of the inner cavity, and a number of screen holes are provided on the surface of the rigid screen. The bottom of the rigid screen abuts against the top of each magnetic fixing block, and each magnetic fixing block is fixed to the inner cavity sidewall.

4. A pneumatically mixed concrete screening apparatus as claimed in claim 3, wherein: The pneumatic bulk material unit includes a high-pressure air inlet pipe fixedly connected to the vibrating screen box on the left side of the lower bulk material chamber. A high-pressure air pump is installed at the inlet end of the high-pressure air inlet pipe, and a conical feed pipe is installed at the bottom of the high-pressure air pump. A pressure conveying pipe is connected to the bottom of the conical feed pipe.

5. A pneumatically mixed concrete screening apparatus as claimed in claim 4, wherein: The left end of the pressure delivery pipe is horizontally positioned and a pressure gauge is mounted on it.

6. A pneumatically mixed concrete screening apparatus according to claim 5, wherein: The bottom surface of the lower material distribution chamber is a spherical curved surface with a downward concave center.

7. A pneumatically mixed concrete screening apparatus according to claim 6, wherein: A wear-resistant metal protrusion is fixedly installed on the inner wall of the lower material hopper on the right side of the spherical curved surface, and the wear-resistant metal protrusion is positioned facing the outlet end of the high-pressure air inlet pipe.

8. A pneumatically mixed concrete screening apparatus according to claim 7, characterised in that: The left side of the wear-resistant metal protrusion is configured as a spherical curved surface.

9. A pneumatically mixed concrete screening apparatus according to claim 8, characterised in that: The surface of the spherical surface is set as a smooth surface that has been polished and ground.

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