Concrete gravel raw material screening device

Abstract

The utility model relates to the technical field of gravel screening, in particular to a concrete gravel raw material screening device which comprises a fixing frame, a passing groove is formed in the middle of the fixing frame, a movable frame is installed on the upper end face of the fixing frame through a sliding mechanism, and a screening hopper is installed on the upper end face of the movable frame through an elastic connecting mechanism. A first motor is transversely and fixedly installed on the outer side wall of the moving frame, an output shaft of the first motor rotationally penetrates through the moving frame and is fixedly provided with a connecting shaft, the connecting shaft is rotationally connected with the moving frame, the connecting shaft is fixedly sleeved with a cam in sliding fit with the lower end face of the screening hopper, and the moving frame is connected with a moving control mechanism. According to the utility model, the screening hopper can move irregularly, so that large-volume gravels are prevented from being accumulated in the device to influence the screening of the gravels.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening technology, and in particular to a screening device for concrete sand and gravel raw materials. Background Technology

[0002] Concrete is a general term for engineering composite materials in which aggregates are bound together by cementing materials. The term concrete usually refers to cement concrete, also known as ordinary concrete, which is made by mixing cement as cementing material, sand and stone as aggregates, and water (which may contain admixtures and additives) in a certain proportion. It is widely used in civil engineering.

[0003] However, in the existing technology, the vibration screening of sand and gravel raw materials is relatively simple. The simple up and down vibration can easily cause large volumes of sand and gravel raw materials to accumulate at the bottom of the device, affecting the screening of sand and gravel raw materials. Therefore, we propose a concrete sand and gravel raw material screening device. Utility Model Content

[0004] This invention provides a concrete aggregate screening device, which solves the above-mentioned technical problems.

[0005] The present invention provides the following solution to the above-mentioned technical problems: A concrete aggregate screening device includes a fixed frame, a through groove in the middle of the fixed frame, a movable frame mounted on the upper end face of the fixed frame via a sliding mechanism, a screening hopper mounted on the upper end face of the movable frame via an elastic connecting mechanism, a first motor horizontally fixedly mounted on the outer wall of the movable frame, the output shaft of the first motor rotatably passing through the movable frame and fixedly mounted with a connecting shaft, the connecting shaft being rotatably connected to the movable frame, a cam fixedly sleeved on the connecting shaft and slidingly engaging with the lower end face of the screening hopper, and a movement control mechanism connected to the movable frame.

[0006] Preferably, the sliding mechanism includes a sliding groove laterally formed on the upper end face of the fixed frame, and the moving frame is slidably connected to the inner wall of the sliding groove.

[0007] Preferably, the elastic connection mechanism includes a telescopic rod that is vertically fixedly installed at the corner of the upper end face of the movable frame. The telescopic rod is fixedly connected to the lower end face of the screening hopper, and a spring is movably sleeved on the outer wall of the telescopic rod.

[0008] Preferably, the motion control mechanism includes a second motor vertically fixedly installed on the lower end face of the fixed frame, the output shaft of the second motor rotatably passes through the fixed frame and is horizontally fixedly installed with a connecting rod, a slotted plate is horizontally fixedly installed on the outer wall of the moving frame, the slotted plate has a drive slot, and a drive shaft that rotatably passes through the drive slot is vertically rotatably installed at the end of the connecting rod.

[0009] Preferably, the cam surface is uniformly mounted with ball bearings.

[0010] The beneficial effects of this utility model are:

[0011] 1. By setting a first motor to drive the cam to rotate, the cam rotation squeezes the screening bucket to move up and down, realizing the up and down vibration of the screening bucket, and vibrating and screening the sand and gravel raw materials. At the same time, the second motor, together with connecting rods and other components, indirectly pulls the screening bucket to move laterally, so that the screening bucket vibrates up and down while moving laterally back and forth, avoiding large volume sand and gravel raw materials from accumulating in one place and affecting the screening of sand and gravel raw materials.

[0012] 2. The screening bucket is connected by a telescopic rod and a spring. The spring also enables the screening bucket to rebound. Ball bearings are installed on the cam surface to replace sliding friction with rolling friction, which reduces the wear of the device components and makes the device run more smoothly.

[0013] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0015] Figure 1 This utility model provides an overall structural schematic diagram of a concrete aggregate screening device.

[0016] Figure 2 This utility model provides an overall structural schematic diagram of a concrete aggregate screening device.

[0017] Figure 3 This utility model provides a schematic diagram of the fixing frame structure of a concrete aggregate screening device;

[0018] Figure 4 This utility model proposes a concrete aggregate screening device. Figure 1 Enlarged view of point A in the middle.

[0019] Legend:

[0020] 1. Fixed frame; 2. Through groove; 3. Moving frame; 4. Screening hopper; 5. First motor; 6. Connecting shaft; 7. Cam; 8. Slide groove; 9. Telescopic rod; 10. Spring; 11. Second motor; 12. Connecting rod; 13. Slotted plate; 14. Drive groove; 15. Drive shaft; 16. Ball bearing. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1-4 The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0022] like Figure 1-4 As shown, this utility model discloses a concrete aggregate screening device, including a fixed frame 1, a through groove 2 in the middle of the fixed frame 1, a movable frame 3 mounted on the upper end face of the fixed frame 1 via a sliding mechanism, the sliding mechanism including a horizontally opened groove 8 on the upper end face of the fixed frame 1, the movable frame 3 being slidably connected to the inner wall of the groove 8, a screening hopper 4 mounted on the upper end face of the movable frame 3 via an elastic connecting mechanism, a first motor 5 horizontally fixedly mounted on the outer wall of the movable frame 3, the output shaft of the first motor 5 rotatably passing through the movable frame 3 and a connecting shaft 6 fixedly mounted thereon, the connecting shaft 6 being rotatably connected to the movable frame 3. The connecting shaft 6 is fixedly sleeved with a cam 7 that slides with the lower end face of the screening bucket 4. The moving frame 3 is connected to a moving control mechanism. This device is equipped with a moving frame 3 that can move laterally. The screening bucket 4 is then installed on the moving frame 3 by means of a telescopic rod 9. The first motor 5 works with the cam 7 to make the screening bucket 4 vibrate up and down. The second motor 11 works with the connecting rod 12, slotted plate 13 and other components to make the screening bucket 4 move laterally. This allows the screening bucket 4 to vibrate up and down while moving laterally back and forth, which accelerates screening and prevents large volume sand and gravel from accumulating and affecting the passage of small volume sand and gravel.

[0023] Specifically, the elastic connection mechanism includes a telescopic rod 9 vertically fixedly installed at the corner of the upper end face of the movable frame 3. The telescopic rod 9 is fixedly connected to the lower end face of the screening hopper 4. A spring 10 is movably sleeved on the outer wall of the telescopic rod 9. The telescopic rod 9 and the spring 10 are set to connect the screening hopper 4 and the movable frame 3, ensuring the limit of the screening hopper 4, so that the screening hopper 4 can move up and down to perform vibratory screening.

[0024] More specifically, the moving control mechanism includes a second motor 11 vertically fixedly installed on the lower end face of the fixed frame 1. The output shaft of the second motor 11 rotates through the fixed frame 1 and is horizontally fixedly installed with a connecting rod 12. A slotted plate 13 is horizontally fixedly installed on the outer wall of the moving frame 3. The slotted plate 13 has a drive groove 14. A drive shaft 15 that rotates through the drive groove 14 is vertically rotatably installed at the end of the connecting rod 12. The rotation of the second motor 11 drives the connecting rod 12 to rotate. The connecting rod 12 pulls the slotted plate 13 to perform horizontal reciprocating motion through the drive shaft 15, which indirectly drives the screening bucket 4 at the top of the moving frame 3 to perform horizontal reciprocating motion, thus preventing large volumes of sand and gravel from accumulating together and affecting the screening of sand and gravel.

[0025] Furthermore, the surface of the cam 7 is uniformly equipped with ball bearings 16, which replace the cam 7 in direct contact with the screening bucket 4, replacing sliding friction with rolling friction, thereby reducing frictional losses of the device and also reducing energy losses.

[0026] Working principle:

[0027] The sand and gravel raw materials are poured into the screening hopper 4, and then the starting device is controlled. The first motor 5 drives the connecting shaft 6 to rotate, and the cam 7 rotates with the connecting shaft 6. The rotation of the cam 7, together with the spring 10, causes the screening hopper 4 to vibrate up and down rapidly. At the same time, the second motor 11 drives the connecting rod 12 to rotate. The connecting rod 12 pulls the slotted plate 13 to perform a horizontal reciprocating motion through the drive shaft 15 at the end. The slotted plate 13 pulls the screening hopper 4 to perform a horizontal reciprocating motion. In this way, the screening hopper 4 vibrates up and down while performing a horizontal reciprocating motion, which not only accelerates the screening of sand and gravel, but also prevents large volumes of sand and gravel from accumulating at the bottom and affecting the screening of sand and gravel.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A concrete aggregate screening device comprising a fixed frame (1), characterised in that: The fixed frame (1) is provided with a through groove (2) in the middle, a moving frame (3) is installed on the upper end face of the fixed frame (1) through a sliding mechanism, a screening bucket (4) is installed on the upper end face of the moving frame (3) through an elastic connecting mechanism, a first motor (5) is fixedly installed on the outer lateral wall of the moving frame (3) in the transverse direction, the output shaft of the first motor (5) penetrates through the moving frame (3) and is fixedly installed with a connecting shaft (6), the connecting shaft (6) is rotatably connected with the moving frame (3), the connecting shaft (6) is fixedly sleeved with a cam (7) which is in sliding cooperation with the lower end face of the screening bucket (4), and the moving frame (3) is connected with a moving control mechanism.

2. A concrete aggregate feed screening device according to claim 1, characterised in that: The sliding mechanism comprises a sliding groove (8) which is horizontally provided on the upper end face of the fixed frame (1), and the moving frame (3) is in sliding connection with the inner wall of the sliding groove (8).

3. A concrete aggregate feed screening device as claimed in claim 1, wherein: The elastic connecting mechanism comprises a telescopic rod (9) which is vertically fixedly installed on the upper end face corner of the moving frame (3), the telescopic rod (9) is fixedly connected with the lower end face of the screening bucket (4), and a spring (10) is movably sleeved on the outer wall of the telescopic rod (9).

4. A concrete aggregate screening apparatus as claimed in claim 1, wherein: The moving control mechanism comprises a second motor (11) which is vertically fixedly installed on the lower end face of the fixed frame (1), the output shaft of the second motor (11) penetrates through the fixed frame (1) and is fixedly installed with a connecting rod (12) in the transverse direction, a slotted plate (13) is fixedly installed on the outer lateral wall of the moving frame (3) in the transverse direction, the slotted plate (13) is provided with a driving groove (14), and the end of the connecting rod (12) is vertically rotatably installed with a driving shaft (15) which penetrates through the driving groove (14).

5. A concrete aggregate feed screening device as claimed in claim 1, wherein: The surface of the cam (7) is uniformly rotatably installed with a plurality of rolling balls (16).

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