Sand screening device for house building
By setting L-shaped support plates and arc-shaped baffles on the outside of the roller screen, the problem of large-particle sand and gravel accumulation in the drum screening machine is solved, the efficient separation and discharge of sand and gravel is achieved, and the screening efficiency is improved.
Patent Information
- Application Number
- CN202422897832.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-26
AI Technical Summary
When the existing drum screening machine is screening sand and gravel, large particles of sand and gravel tend to accumulate in the drum, taking up space, increasing the load and reducing work efficiency.
A building construction sand screening device is designed. An L-shaped support plate on the outside of the roller screen is used to screen the sand and gravel mixture. Fine-grained sand enters the roller screen through the side wall of the roller screen, while large-grained sand and gravel are retained on the outer wall and discharged through the sand and gravel chute. An arc-shaped baffle is used to prevent sand from leaking into the fine sand chute, thereby realizing the separation of fine-grained sand and large-grained sand and gravel.
It effectively avoids the accumulation of fine sand in the roller screen, improves the screening efficiency, ensures the smooth discharge of fine sand and the timely removal of large sand and gravel, and improves work efficiency.
Smart Images
Figure CN223475509U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of construction machinery and equipment, and relates to a sand screening device for building construction. Background Technology
[0002] During building construction, ensuring the uniformity of sand particle size in the concrete mixture is crucial for ensuring building quality. Sand containing large particles of gravel requires screening. A drum screen is a commonly used sand and gravel separation device. In existing drum screens, the sand and gravel mixture is fed into the drum, and the rotating drum filters out the sand. However, large particles of gravel tend to accumulate inside the drum and are difficult to remove, not only occupying valuable space but also increasing the drum's load and potentially reducing the drum screen's efficiency. Utility Model Content
[0003] The purpose of this invention is to provide a sand screening device for building construction, so as to solve the problem of sand and gravel easily accumulating inside the drum mentioned in the background art.
[0004] This utility model is achieved through the following technical solution:
[0005] A sand screening device for building construction includes a frame on which a rotatable roller screen for screening sand is installed. The outer wall of the roller screen is fixed with a plurality of L-shaped support plates evenly distributed in a ring. A sand and gravel mixture is fed into the L-shaped support plate on the right side of the roller screen. As the roller screen rotates, fine sand particles in the sand and gravel mixture can pass through the side wall of the roller screen and enter the interior of the roller screen, while large sand and gravel particles are retained on the outer wall of the roller screen and the L-shaped support plate.
[0006] The frame is equipped with sand and gravel chutes and fine sand chutes distributed on the left and right. One end of the sand and gravel chutes is inclined upward and extends into the bottom of the rotary screen to collect and discharge the screened sand and gravel. One end of the fine sand chutes is inclined upward and extends into the bottom of the rotary screen to collect and discharge the screened sand.
[0007] The inner wall of the rotary screen is equipped with an arc-shaped baffle. The outer wall of the arc-shaped baffle is in close contact with the inner wall of the rotary screen. The arc-shaped baffle is located above the sand and gravel chute and is fixed on the frame. When the rotary screen rotates, the arc-shaped baffle remains fixed on the frame. Under the blocking effect of the arc-shaped baffle, the sand that leaks into the rotary screen is prevented from falling into the sand and gravel chute from the side wall of the rotary screen above the sand and gravel chute. The sand in the rotary screen passes through the side wall where it is not blocked by the arc-shaped baffle and falls into the fine sand chute.
[0008] Furthermore, the frame includes a base plate, and the bottom surface of the base plate is equipped with multiple sets of wheels with brakes, which facilitates the movement and fixation of the sand screening device.
[0009] Furthermore, the rotary screen includes a screen cylinder with circular end plates fixed at both ends. The top surface of the bottom plate is provided with two first support plates for supporting the two circular end plates respectively, and the circular end plates can rotate on the first support plates. A second support plate is fixed on the bottom plate, and a rotatable shaft is installed on the top of the second support plate. One end of the shaft is fixedly connected to one of the circular end plates. The center of the other circular end plate has a through hole for inserting an arc-shaped baffle, which is equal to the inner diameter of the screen cylinder. The arc-shaped baffle is inserted into the screen cylinder through the through hole. A bracket is fixedly connected to the end of the arc-shaped baffle on the top surface of the bottom plate to ensure that the arc-shaped baffle remains fixed relative to the bottom plate when the screen cylinder rotates.
[0010] Furthermore, the top of each of the first support plates is an arc surface that slides with the outer wall of the circular end plate. The outer wall of the circular end plate is provided with an annular groove. An arc-shaped limiting block is fixed on the arc surface at the top of the first support plate, which engages with and slides with the annular groove. The matching structure of the arc-shaped limiting block and the annular groove is used to limit the movement of the roller screen and prevent the roller screen from moving along the axial direction.
[0011] Furthermore, a motor is installed on the top surface of the base plate, a reducer is installed on the power output end of the motor, a drive wheel is installed on the power output end of the reducer, and a driven wheel is installed on the other end of the rotating shaft. The driven wheel and the drive wheel are connected by a transmission belt. The motor can drive the rotating shaft to rotate, thereby controlling the rotation of the rotary screen.
[0012] Furthermore, 6 to 12 L-shaped support plates are provided. The two ends of the L-shaped support plates are fixedly connected to two circular end plates respectively. The L-shaped support plates, the screen cylinder, and the two circular end plates together form a receiving trough for holding the sand and gravel mixture. The sand and gravel mixture is placed into the receiving trough on the upper right side of the rotary screen. As the rotary screen rotates, the sand and gravel mixture in the receiving trough rolls on the outer surface of the rotary screen. Fine sand can pass through the side wall of the rotary screen and enter it, while large sand and gravel particles remain on the outer surface of the rotary screen. When the large sand and gravel particles rotate to the left side of the rotary screen, they fall into the sand and gravel chute below.
[0013] Furthermore, a feed chute is provided above the fine sand chute for guiding the sand and gravel mixture into the L-shaped pallet. As the rotary screen continues to rotate, after the sand and gravel mixture is poured into the feed chute, the sand and gravel mixture slides down the feed chute onto the L-shaped pallet for rotational screening on the side wall of the screen cylinder.
[0014] Furthermore, the sand screening device also includes a conveyor for transporting the sand and gravel mixture into the feed chute.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] This sand screening device is used to screen sand and gravel mixtures. It uses a rotating drum screen to separate sand and gravel. Fine sand can enter the drum screen from the upper side wall and then fall into the fine sand chute from the lower side wall. Larger particles of sand and gravel are retained on the outer side wall of the drum screen and fall into the gravel chute as the drum screen rotates. Fine sand can easily enter and exit the drum screen, which can prevent fine sand from accumulating at the bottom of the drum screen and being difficult to discharge. This sand screening device can facilitate the screening of sand and gravel mixtures and has high working efficiency. Attached Figure Description
[0017] 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 parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.
[0018] Figure 1 This is a cross-sectional structural diagram of the sand screening device of this utility model;
[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the middle AA direction;
[0020] Figure 3 This is a diagram showing the usage status of the sand screening device of this utility model.
[0021] The components in the diagram are named as follows: 1. Frame; 1.1. Base plate; 1.2. First support plate; 1.3. Second support plate; 2. Rotary screen; 2.1. Screen cylinder; 2.2. Circular end plate; 2.3. Annular chute; 2.4. Through hole; 3. L-shaped support plate; 4. Arc-shaped baffle; 5. Fine sand chute; 6. Feed chute; 7. Traveling wheel; 8. Sand and gravel chute; 9. Rotating shaft; 10. Driven wheel; 11. Arc-shaped limit block; 12. Transmission belt; 13. Motor; 14. Drive wheel; 15. Conveyor. Detailed Implementation
[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.
[0023] In the description of this application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "front", "back", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] A sand screening device for building construction, such as Figures 1 to 3 As shown, it mainly consists of a frame 1, a rotary screen 2, a drive mechanism for driving the rotary screen 2 to rotate, multiple L-shaped support plates 3 fixed in a ring on the outer side wall of the rotary screen 2, a sand and gravel chute 8, a fine sand chute 5, and a conveyor 15.
[0025] like Figure 1 and Figure 2 As shown, the frame 1 consists of a base plate 1.1, two first support plates 1.2, a second support plate 1.3, and multiple brackets. The bottom surface of the base plate 1.1 is equipped with multiple sets of traveling wheels 7 with brakes, which facilitates the movement and fixation of the sand screening device. The bottom ends of the two first support plates 1.2 are welded and fixed to the top surface of the base plate 1.1, and the two first support plates 1.2 are distributed in parallel intervals. The bottom end of the second support plate 1.3 is welded to the top surface of the base plate 1.1, and a rotatable shaft 9 is installed on the top of the second support plate 1.3 through a bearing.
[0026] like Figure 1 and Figure 2 As shown, the rotary screen 2 consists of a screen cylinder 2.1 and two circular end plates 2.2 fixed at the front and rear ends of the screen cylinder 2.1. The rotary screen 2 is rotatably disposed between two first support plates 1.2, and one end of the rotating shaft 9 is fixedly connected to one of the circular end plates 2.2.
[0027] Specifically, the top of each first support plate 1.2 is an arc surface that slides with the outer wall of the circular end plate 2.2. The outer wall of the circular end plate 2.2 is provided with an annular groove 2.3. An arc-shaped limiting block 11 that engages with and slides with the annular groove 2.3 is fixed on the arc surface of the top of the first support plate 1.2. The two first support plates 1.2 can support the two circular end plates 2.2 and allow the circular end plates 2.2 to rotate on them. The matching structure of the arc-shaped limiting block 11 and the annular groove 2.3 limits the movement of the roller screen 2 and prevents the roller screen 2 from moving along the axial direction.
[0028] like Figure 2 As shown, the drive mechanism includes a motor 13, a drive wheel 14, a driven wheel 10, and a transmission belt 12. The motor 13 is fixedly mounted on the top surface of the base plate 1.1. A reducer is installed at the power output end of the motor 13. The drive wheel 14 is installed at the power output end of the reducer, and the driven wheel 10 is installed at the other end of the rotating shaft 9. The driven wheel 10 and the drive wheel 14 are connected by the transmission belt 12. The motor 13 can drive the rotating shaft 9 to rotate, thereby controlling the rotation of the rotary screen 2. The transmission belt 12 can be a belt, a synchronous belt, or a chain. Correspondingly, the drive wheel 14 and the driven wheel 10 can be pulleys, synchronous pulleys, or sprockets. The motor 13 with the reducer is a prior art product and can be conventionally selected.
[0029] like Figure 1 As shown, eight L-shaped support plates 3 are provided, and the eight L-shaped support plates 3 are evenly distributed in a ring. The two ends of the L-shaped support plates 3 are fixedly connected to two circular end plates 2.2 respectively. The L-shaped support plates 3, the screen cylinder 2.1 and the two circular end plates 2.2 together form a receiving groove for holding the sand and gravel mixture. The sand and gravel mixture is placed into the receiving groove on the upper right of the rotary screen 2. As the rotary screen 2 rotates, the sand and gravel mixture in the receiving groove rolls on the outer surface of the rotary screen 2. Fine sand can pass through the side wall of the rotary screen 2 and enter it. Large sand and gravel particles are retained on the outer surface of the rotary screen 2. When the large sand and gravel particles rotate to the left side of the rotary screen 2, they naturally fall off the rotary screen 2. Specifically, the screen hole diameter of the screen cylinder 2.1 is only suitable for fine sand to pass through, ensuring that large sand and gravel particles cannot pass through.
[0030] like Figure 1 and Figure 2 As shown, the sand and gravel chute 8 and the fine sand chute 5 are respectively installed on the top surface of the base plate 1.1 by a bracket. The sand and gravel chute 8 is located to the left of the fine sand chute 5. The right end of the sand and gravel chute 8 extends upward at an angle to the bottom of the rotary screen 2 to collect and discharge the screened sand and gravel. The left end of the fine sand chute 5 extends upward at an angle to the bottom of the rotary screen 2 to collect and discharge the screened sand.
[0031] like Figure 1 and Figure 2 As shown, the inner wall of the screen cylinder 2.1 of the rotary screen 2 is provided with an arc-shaped baffle 4. The outer wall of the arc-shaped baffle 4 is in close contact with the inner wall of the rotary screen 2. The arc-shaped baffle 4 is located above the sand and gravel chute 8 and is fixed on the frame 1. When the rotary screen 2 rotates, the arc-shaped baffle 4 remains fixed on the frame 1. Under the blocking effect of the arc-shaped baffle 4, the sand that leaks into the rotary screen 2 can be prevented from falling into the sand and gravel chute 8 from the side wall of the rotary screen 2 above the sand and gravel chute 8. The sand in the rotary screen 2 passes through the side wall and falls into the fine sand chute 5 where it is not blocked by the arc-shaped baffle 4.
[0032] Specifically, another circular end plate 2.2 has a through hole 2.4 at its center for inserting an arc-shaped baffle 4, which is equal to the inner diameter of the screen cylinder 2.1. The arc-shaped baffle 4 is inserted into the screen cylinder 2.1 through the through hole 2.4. A bracket is fixed on the top surface of the bottom plate 1.1 and fixedly connected to the end of the arc-shaped baffle 4 to ensure that the arc-shaped baffle 4 remains fixed relative to the bottom plate 1.1 when the screen cylinder 2.1 rotates.
[0033] like Figure 1 and Figure 3 As shown, a feed chute 6 is provided above the fine sand chute 5 to guide the sand and gravel mixture onto the L-shaped pallet 3. As the rotary screen 2 continues to rotate, after the sand and gravel mixture is poured into the feed chute 6, the sand and gravel mixture slides down onto the L-shaped pallet 3 on the feed chute 6 for rotational screening on the side wall of the screen cylinder 2.1.
[0034] The conveyor 15 is installed on the right side of the rotary screen 2. The conveyor 15 is used to transport the sand and gravel mixture into the feed chute 6. Specifically, the conveyor 15 can be an inclined belt conveyor, scraper conveyor, chain conveyor, etc., which are all existing technologies.
[0035] The working principle of this sand screening device is as follows:
[0036] During building construction, this sand screening device is used to screen sand and gravel mixtures to screen out sand that meets the particle size requirements of concrete.
[0037] like Figure 3 As shown, the conveyor 15 transports the sand and gravel mixture from a lower position to the feed chute 6 at a higher position. Starting the motor 13 drives the rotating shaft 9 via the transmission belt 12, which in turn drives the rotary screen 2 to rotate counterclockwise. The sand and gravel mixture falling into the feed chute 6 slides onto the L-shaped support plate 3 on the upper right side of the screen cylinder 2.1. As the screen cylinder 2.1 continues to rotate, the L-shaped support plate 3 carries the sand and gravel mixture. Fine sand particles in the mixture pass through the side wall of the screen cylinder 2.1 and enter its interior, then fall through the lower side wall of the screen cylinder 2.1 into the fine sand chute 5. Larger sand and gravel particles cannot pass through the side wall of the screen cylinder 2.1 and remain trapped within it. On the outer wall of the screen cylinder 2.1, as large sand and gravel rotate to the left, they detach from the support of the L-shaped support plate 3 and gradually slide off the screen cylinder 2.1 and the L-shaped support plate 3. The large sand and gravel fall into the sand and gravel chute 8 below. It should be noted that because the inner wall of the screen cylinder 2.1 above the sand and gravel chute 8 is blocked by the arc-shaped baffle 4, the sand entering the screen cylinder 2.1 cannot fall into the sand and gravel chute 8 from here. As the screen cylinder 2.1 rotates, the sand in the screen cylinder 2.1 falls out from the side wall of the screen cylinder 2.1 above the fine sand chute 5 and enters the fine sand chute 5, thereby achieving the separation of fine sand and large sand and gravel.
[0038] It should be noted that during the screening process, the conveying flow rate of the conveyor 15 and the rotation speed of the screen cylinder 2.1 should be controlled. It is advisable to allow a small amount of sand and gravel mixture to fall onto the L-shaped pallet 3 and for the screen cylinder 2.1 to rotate slowly. This is to avoid the large amount of sand and gravel mixture falling onto the L-shaped pallet 3, which would hinder the fine sand from entering the screen cylinder 2.1. It is also to avoid the screen cylinder 2.1 rotating too fast, which would cause the fine sand to fall into the sand and gravel chute 8 along with the large sand and gravel particles before it could fall into the screen cylinder 2.1.
[0039] This sand screening device is used to screen sand and gravel mixtures. Large sand and gravel particles do not enter the screen cylinder 2.1. Fine sand particles fall into the screen cylinder 2.1 and then fall out from the bottom of the screen cylinder 2.1 into the fine sand chute 5. This makes it difficult for sand to accumulate in the screen cylinder 2.1, which facilitates the screening of sand and gravel mixtures and results in high working efficiency.
[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the 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, and they should all be covered within the scope of the claims and specification of this utility model.
Claims
1. A sand screening device for building construction, comprising a frame (1), on which a rotatable rotary screen (2) for screening sand is mounted, characterized in that: The outer wall of the rotary screen (2) is fixed with a plurality of L-shaped trays (3) evenly distributed in a ring; The frame (1) is equipped with sand and gravel chutes (8) and fine sand chutes (5) distributed on the left and right. One end of the sand and gravel chutes (8) extends upwards to the bottom of the rotary screen (2) to collect and discharge the screened sand and gravel. One end of the fine sand chutes (5) extends upwards to the bottom of the rotary screen (2) to collect and discharge the screened sand. The inner wall of the rotary screen (2) is provided with an arc-shaped baffle (4). The outer wall of the arc-shaped baffle (4) is in close contact with the inner wall of the rotary screen (2). The arc-shaped baffle (4) is located above the sand and gravel chute (8) and is fixed on the frame (1).
2. The sand screening device for building construction according to claim 1, characterized in that: The frame (1) includes a base plate (1.1), and the bottom surface of the base plate (1.1) is equipped with multiple sets of walking wheels (7) with brakes.
3. The sand screening device for building construction according to claim 2, characterized in that: The rotary screen (2) includes a screen cylinder (2.1), with circular end plates (2.2) fixed at both ends of the screen cylinder (2.1). The top surface of the bottom plate (1.1) is provided with two first support plates (1.2) for supporting the two circular end plates (2.2). A second support plate (1.3) is fixed on the bottom plate (1.1). A rotatable shaft (9) is installed on the top of the second support plate (1.3). One end of the shaft (9) is fixedly connected to one of the circular end plates (2.2). The center of the other circular end plate (2.2) is provided with a through hole (2.4) for inserting an arc-shaped baffle (4) and having the same inner diameter as the screen cylinder (2.1). The top surface of the bottom plate (1.1) is fixed with a bracket that is fixedly connected to the end of the arc-shaped baffle (4).
4. The sand screening device for building construction according to claim 3, characterized in that: The top of each of the first support plates (1.2) is an arc surface that slides with the outer wall of the circular end plate (2.2). The outer wall of the circular end plate (2.2) is provided with an annular groove (2.3). An arc-shaped limiting block (11) that engages with and slides with the annular groove (2.3) is fixed on the arc surface of the top of the first support plate (1.2).
5. The sand screening device for building construction according to claim 3, characterized in that: A motor (13) is installed on the top surface of the base plate (1.1). A reducer is installed at the power output end of the motor (13). A drive wheel (14) is installed at the power output end of the reducer. A driven wheel (10) is installed at the other end of the shaft (9). The driven wheel (10) and the drive wheel (14) are connected by a transmission belt (12).
6. The sand screening device for building construction according to claim 3, characterized in that: The L-shaped tray (3) is provided in 6 to 12 units. The two ends of the L-shaped tray (3) are fixedly connected to two circular end plates (2.2) respectively. The L-shaped tray (3), the sieve cylinder (2.1) and the two circular end plates (2.2) together form a receiving trough for holding sand and gravel mixture.
7. The sand screening device for building construction according to any one of claims 1 to 6, characterized in that: Above the fine sand chute (5) is a feed chute (6) for guiding the sand and gravel mixture onto the L-shaped pallet (3).
8. The sand screening device for building construction according to claim 7, characterized in that: The sand screening device also includes a conveyor (15) for conveying the sand and gravel mixture into the feed chute (6).