Cement production line mechanism sand large batch screening device
By designing flooring, feed chutes, and screen components in the cement production line, and combining them with drive devices and vibrating motors, efficient screening of manufactured sand was achieved, solving the problems of low screening efficiency and cumbersome feeding of existing equipment, and simplifying the operation process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGXIA ZHONGNING SAIMA CEMENT CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-07
AI Technical Summary
Existing manufactured sand screening equipment has low screening efficiency and requires the material to be transferred to the screening equipment via an elevator, which is cumbersome and affects production efficiency and sand quality.
A batch screening device for manufactured sand in a cement production line was designed, including a floor, a feed chute, and a screen assembly. Raw materials are directly transported to the feed chute by a loader or excavator, simplifying the feeding process. The tilt angle of the screen plate can be adjusted by a drive device to adapt to different working conditions. Combined with a vibrating motor and a belt conveyor, the screening efficiency is improved.
It simplifies the feeding process, improves screening efficiency, reduces equipment complexity, and achieves efficient manufactured sand screening to meet the screening needs of different working conditions.
Smart Images
Figure CN224463155U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cement production technology, specifically to a batch screening device for manufactured sand in a cement production line. Background Technology
[0002] Manufactured sand is produced by mechanically crushing rocks (limestone, granite, basalt, etc.) or industrial waste (such as slag and construction waste) into particles with a diameter ≤4.75mm through crushing (such as jaw crushers, impact crushers, and sand making machines). Manufactured sand can replace natural sand and be directly added to cement to improve particle size distribution and enhance early strength. Screening is a crucial processing step in cement production, directly affecting sand quality, cement performance, and production efficiency. Cement and concrete have strict standards for the ratio of coarse to fine particles in sand (e.g., medium sand in Zone II requires a cumulative sieve residue of 30%~65% through a 0.6mm sieve). Unscreened manufactured sand may have an excess of both coarse and coarse particles (too much stone powder), leading to poor workability and uneven strength in concrete. While the demand for manufactured sand in cement production is huge, existing screening equipment is inefficient. Manufactured sand needs to be transported to an elevator and then fed to screening equipment, making the operation cumbersome. Utility Model Content
[0003] In view of the above problems, this application provides a batch screening device for manufactured sand in a cement production line, which simplifies the feeding process in the screening of manufactured sand and improves screening efficiency.
[0004] According to one aspect of the embodiments of this application, a batch screening device for manufactured sand in a cement production line is provided. The batch screening device includes a floor and a screen assembly and a transfer assembly located below the floor. A square groove is formed on the floor, and a guide trough that gradually narrows downwards is fixed on the inner sidewall of the square groove. The top of the square groove is lower than the upper surface of the floor. The screen assembly includes a support frame and a screen plate disposed above the support frame. The screen plate is inclined, and the bottom end of the square groove extends above the screen plate. The lower end of the screen plate is hinged to the support frame, and a tilting shaft is hinged to each side of the higher end of the screen plate. Two driving devices are symmetrically arranged on both sides of the support frame. Each driving device includes a threaded rod rotatably connected via two rotating seats. One end of the threaded rod is drivenly connected to a motor, and a sliding block is screwed into the middle of the threaded rod. The lower end of the tilting shaft is hinged to the sliding block.
[0005] In some embodiments, the transfer assembly includes two belt conveyors, one of which is disposed below the screen plate, and the input end of the other belt conveyor is located below the lower end of the screen plate.
[0006] In some embodiments, the screen plate includes a screen plate body and a steel frame surrounding the screen plate body, the flipping shaft is connected to the steel frame, the screen plate body has mesh holes, a discharge chute is provided at the lower end of the screen plate, and the other end of the discharge chute extends above the belt conveyor.
[0007] In some embodiments, a vibration motor is included, which is connected to the mesh plate body.
[0008] In some embodiments, a sliding groove is provided at the top of the support frame below the threaded rod, and a protrusion is provided below the sliding block, the protrusion being inserted into the sliding groove.
[0009] In some embodiments, a slide gate valve is provided at the feed chute.
[0010] The beneficial effects of this application are as follows: By setting up a floor, a guide chute, and a screen assembly, with the screen assembly located below the guide chute, this application eliminates the need for a hoist during the feeding process. Instead, a forklift and excavator are used to transport the raw materials stored near the floor to the guide chute. Compared to the prior art, which involves first using an excavator to transfer the raw materials to a hoist and then lifting them above the screen plate, this application simplifies the feeding process and eliminates the need for the hoist and related components. Furthermore, by incorporating a drive unit and a tilting shaft, the tilting shaft can be rotated by the drive unit to adjust the tilt angle of the screen plate, thus accommodating different working conditions.
[0011] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description
[0012] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0013] Figure 1 This is a schematic diagram of the overall installation structure of the device provided in the embodiments of this application;
[0014] Figure 2 This is a schematic diagram of the overall structure of the device provided in the embodiments of this application;
[0015] Figure 3A schematic diagram of the overall structure of the device provided in this application embodiment from another perspective;
[0016] Figure 4 This is a partial structural diagram of the support frame shown in an embodiment of this application.
[0017] The reference numerals in the detailed embodiments are as follows:
[0018] A cement production line mass screening device for manufactured sand includes: a floor 110, a square trough 111, a guide trough 112, a screen assembly 120, a support frame 121, a sliding trough 121a, a screen plate 122, a screen plate body 122a, a steel frame 122b, a discharge chute 122c, a tilting shaft 123, a transfer assembly 130, a belt conveyor 131, a drive unit 140, a rotating seat 141, a threaded rod 142, a motor 143, a sliding block 144, and a protrusion 144a. Detailed Implementation
[0019] The embodiments of the technical solution of this application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and the foregoing description of the accompanying drawings are intended to cover non-exclusive inclusion.
[0020] For details, please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the overall installation structure of the device provided in an embodiment of this application. Figure 2 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application. Figure 3 This is a schematic diagram of the overall structure of the device provided in an embodiment of this application from another perspective. Figure 4This is a partial structural diagram of the support frame shown in an embodiment of this application. The cement production line mass screening device 100 for manufactured sand includes a floor 110 and a screen assembly 120 and a transfer assembly 130 located below the floor 110. The floor 110 can be a floor slab or a cantilever slab set on one side of a gentle slope. Support columns are usually installed under the floor for support. The support columns are cast with reinforced concrete and have sufficient strength. The manufactured sand raw material to be screened is located on the floor 110 or on the ground connected to the floor 110. The manufactured sand is stored in the open air. During operation, the operator can drive an excavator or a loader to directly transfer the raw material stored in the open air on the ground and pour it into the square trough 111. The floor 110 has a square trough 111. A guide trough 112 that gradually narrows downwards is fixed on the inner side wall of the square trough 111. The guide trough 112 and the square trough 111 can be fixedly connected by screws or other components. The top of the square trough 111 is lower than the top surface of the floor, thereby facilitating the loader to push the raw material directly into the guide trough 112 during the transfer process. The screen assembly 120 includes a support frame 121 and a screen plate 122 disposed above the support frame 121. The screen plate 122 is inclined, and the bottom end of the square groove 111 extends to the top of the screen plate 122. After the raw material falls into the screen plate 122, it slides downward under its own weight and the action of the vibration motor 143. The raw material with a smaller particle size passes through the screen plate 122 and falls down, while the raw material with a larger particle size will continue to roll down along the screen plate 122 to the lower end of the screen plate 122 and be collected. The lower end of the screen plate 122 is hinged to the support frame 121, and the two sides of the higher end of the screen plate 122 are respectively hinged to the rotating shafts 123. Two drive devices 140 are symmetrically arranged on both sides of the support frame 121. The drive devices 140 are used to drive the rotating shafts 123 to rotate, thereby adjusting the tilt angle of the screen plate 122. When the tilt angle of the screen plate 122 is small, the sliding speed of the raw material on the top surface of the screen plate 122 is low. Although the screening efficiency is reduced, it can effectively avoid the problem of some fine sand not passing through the screen plate 122 in time due to insufficient screening during the slow screening process. Conversely, when the tilt angle is large, the sliding speed of the raw material on the screen plate 122 will increase, and the screening efficiency will be improved. The drive device 140 includes a threaded rod 142 rotatably connected by two rotating seats 141. One end of the threaded rod 142 is connected to a motor 143, and a sliding block 144 is screwed to the middle of the threaded rod 142. The lower end of the flipping shaft 123 is hinged to the sliding block 144. When the motor 143 is turned on, the motor 143 drives the threaded rod 142 to rotate. Furthermore, the threaded rod 142 drives the sliding block 144 to move in the horizontal direction. During the movement, the sliding block will further push the flipping shaft 123 to move, thereby changing the tilt angle of the screen plate 122.
[0021] As can be seen from the above, in this embodiment of the application, during the working process, the operator uses a forklift or excavator to feed the raw materials to be screened stored above the floor slab into the guide trough 112 through the square trough 111. The material is guided to the screen plate 122 through the guide trough 112, and the material slides down the screen plate 122 in the opposite direction, thereby completing the screening. When the working conditions change and the requirements for screening efficiency and accuracy need to be changed, this can be achieved by adjusting the tilt angle of the screen plate 122. During the adjustment process, it is ensured that there is no material left above the screen plate 122. Then, the motor 143 is turned on, and the sliding block 144 and the tilting shaft 123 are driven in sequence through the threaded rod 142. When the lower end of the tilting shaft 123 is close to the end of the screen plate 122, the higher end of the screen plate 122 will be lifted, and the tilt angle of the screen plate 122 will increase. Conversely, the tilt angle of the screen plate 122 will decrease.
[0022] As can be seen from the above, in this embodiment, by setting up a floor 110, a guide chute 112, and a screen assembly 120, with the screen assembly 120 located below the guide chute 112, this application eliminates the need for a hoist during the material loading process. Instead, a forklift and excavator are used to transport the raw materials stored near the floor 110 to the guide chute 112. Compared to the prior art, which involves first using an excavator to transfer the raw materials to a hoist and then using the hoist to lift them above the screen plate 122, this application simplifies the material loading process and allows for the removal of the hoist and related components. Furthermore, by setting up a drive device 140 and a tilting shaft 123 in cooperation, the drive device can rotate the tilting shaft 123 to adjust the tilt angle of the screen plate 122, thus meeting different working conditions.
[0023] In some embodiments, the transfer assembly 130 includes two belt conveyors 131, one of which is disposed below the screen plate 122, and the input end of the other belt conveyor 131 is located below the lower end of the screen plate 122. In this embodiment, by providing two belt conveyors 131, one conveyor 131 can accept and transfer small-diameter raw materials passing through the screen plate 122 below it, while the other conveyor can receive and transfer large-diameter raw materials at the lower end of the screen plate 122, thereby allowing the two separated raw materials to be transferred separately.
[0024] In some embodiments, the screen plate 122 includes a screen plate body 122a and a steel frame 122b surrounding the screen plate body 122a. A flipping shaft 123 is connected to the steel frame 122b. The screen plate body 122a has mesh openings. A discharge chute 122c is provided at the lower end of the screen plate 122, and the other end of the discharge chute 122c extends above the belt conveyor 131. In this embodiment, by providing the steel frame 122b, the overall connection strength of the screen assembly 120 is further improved, and the discharge chute 122c can guide the material discharge from the end of the screen plate 122, reducing spillage.
[0025] In some embodiments, a vibration motor 143 is included, which is connected to the screen plate body 122a. In this embodiment, by providing the vibration motor 143, the screening efficiency of the screen plate 122 is further accelerated.
[0026] In some embodiments, a sliding groove 121a is formed at the top of the support frame 121 below the threaded rod 142, and a protrusion 144a is provided below the sliding block 144, which is inserted into the sliding groove 121a. In this embodiment, through the above arrangement, the bottom of the sliding block 144 is always limited by the sliding groove 121a during the sliding process, thereby improving the stability of the connection between the components of the drive device 140.
[0027] In some embodiments, a gate valve is provided at the guide trough 112. In this embodiment, the opening and closing of the channel below the guide trough 112 is controlled by the gate valve.
[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although the foregoing embodiments have provided a detailed description of this application, 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. These 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 application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A batch screening device for manufactured sand in a cement production line, characterized in that, Includes a floor and a screen assembly and a transfer assembly located beneath the floor; A square groove is provided on the floor, and a guide groove that gradually narrows downwards is fixed on the inner wall of the square groove. The top of the square groove is lower than the top surface of the floor. The screen assembly includes a support frame and a screen plate disposed above the support frame. The screen plate is inclined, and the bottom end of the square groove extends to the top of the screen plate. The lower end of the screen plate is hinged to the support frame, and a flipping shaft is hinged to both sides of the higher end of the screen plate. Two driving devices are symmetrically arranged on both sides of the support frame. Each driving device includes a threaded rod rotatably connected by two rotating seats. One end of the threaded rod is connected to a motor, and a sliding block is screwed into the middle of the threaded rod. The lower end of the flipping shaft is hinged to the sliding block.
2. The mass screening device for manufactured sand in a cement production line according to claim 1, characterized in that, The transfer assembly includes two belt conveyors, one of which is located below the screen plate, and the other belt conveyor has its input end located below the lower end of the screen plate.
3. The mass screening device for manufactured sand in a cement production line according to claim 2, characterized in that, The screen plate includes a screen plate body and a steel frame surrounding the screen plate body. The flipping shaft is connected to the steel frame. The screen plate body has mesh holes. A discharge chute is provided at the lower end of the screen plate. The other end of the discharge chute extends above the belt conveyor.
4. The mass screening device for manufactured sand in a cement production line according to claim 3, characterized in that, It includes a vibration motor, which is connected to the main body of the mesh plate.
5. The mass screening device for manufactured sand in a cement production line according to claim 1, characterized in that, The top of the support frame is provided with a sliding groove below the threaded rod, and a protrusion is provided below the sliding block, the protrusion being inserted into the sliding groove.
6. The mass screening device for manufactured sand in a cement production line according to claim 1, characterized in that, A slide gate valve is installed at the feed chute.