Graded screening device for machine-made sand

Abstract

The utility model relates to the technical field of machine-made sand production, in particular to a grading screening device for machine-made sand. The device comprises a screen, the screen is fixedly connected to a screen frame, the screen frame is fixedly connected to a rotating shaft, the rotating shaft is rotationally connected to a screening shell, the rotating shaft is in transmission connection with a power assembly driving the rotating shaft to rotate forwards and backwards, and a frame of the screen frame slides on the inner side wall of the screening shell. According to the device, machine-made sand rolls back and forth on the screen, so that the machine-made sand is fully screened; the device can be used for grading and screening, and finally the gravels are divided into a plurality of gravels with different particle sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of machine-made sand production, in particular to a grading and screening device for machine-made sand. Background Art

[0002] Sand and gravel are important materials, currently mainly divided into natural sand and machine-made sand. The material made by artificially crushing stone using equipment such as sand making machines is called machine-made sand. Whether it is natural sand or machine-made sand, different particle sizes will appear in the production process. Sand and gravel of different particle sizes have different functions. Therefore, machine-made sand needs to be sorted and classified before being mixed with other materials to prevent it from affecting the performance during subsequent use.

[0003] Chinese patent CN202221708798.1 discloses "A Sorting Device", publication number CN217940823U, which includes a support frame; a drum screen, the drum screen is cylindrical, one end of the drum screen is provided with a feed port, and the other end is provided with a discharge port, the drum screen is rotatably arranged on the support frame, and is arranged downwardly in an inclined direction from the feed port to the discharge port, the drum screen is provided with a first screening section and a second screening section, the screening apertures of the first screening section and the second screening section are increased successively, and the first screening section and the second screening section are arranged successively in a direction from the feed port to the discharge port; a driving mechanism is transmission-connected to the drum screen to drive the drum screen to rotate; a first material receiving funnel is arranged below the first screening section for receiving the screened material; and a second material receiving funnel is arranged below the second screening section for receiving the screened material. However, the device has some defects: the screening of the device is relatively rough, and in the process of sand and gravel flowing from the first screening section to the third screening section, it may be mixed with sand and gravel that have not been screened by the first screening section and the second screening section in time, and these sand and gravel that have not been screened by the first screening section and the second screening section in time will fall into the second receiving funnel and the third receiving funnel, thereby causing the sand and gravel in the second receiving funnel and the third receiving funnel to not be completely classified and screened. Utility Model Content

[0004] In order to solve the problems of the above-mentioned prior art, the utility model provides a grading and screening device for machine-made sand, which can grade and screen the machine-made sand passing through the screen, so that the machine-made sand can be fully screened, reducing the probability that sand and gravel will not be screened in time.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a grading and screening device for machine-made sand, comprising a screen, wherein the screen is fixedly connected to a screen frame, the screen frame is fixedly connected to a rotating shaft, the rotating shaft is rotatably connected to a screening shell, the rotating shaft is transmission-connected to a power component that drives its forward and reverse rotation, and the frame of the screen frame slides on the inner side wall of the screening shell.

[0006] With the above structural design, the machine-made sand is classified and screened through the screen for subsequent use. The rotating shaft drives the screen to rotate forward and reverse at a certain angle, so that the machine-made sand rolls back and forth on the screen, so that the machine-made sand is fully screened.

[0007] Preferably, an inclined baffle is provided below the screen, the inclined baffle is fixedly connected to the inner side wall of the screening shell, and the screening shell is provided with a discharge port corresponding to the lower end of the inclined baffle.

[0008] The above structural design makes it easy to collect the sand and gravel that are finally screened out.

[0009] Preferably, a slide rail is fixedly connected to the inner side wall of the screening shell, a slide groove matching the slide rail is provided on the frame of the screen frame, and a roller is rotatably connected to the groove wall of the slide groove.

[0010] With the above structural design, the frame of the screen frame can slide more stably on the inner side wall of the screening shell.

[0011] Preferably, the screen frame and the rotating shaft are both inclined along their length directions, and along the inclined directions of the screen frame and the rotating shaft, a discharge channel for passing the screened material is fixedly connected to the shell wall of the screening shell.

[0012] With the above structural design, the machine-made sand moves along the inclined direction, the sand and gravel smaller than the sieve hole falls, and the machine-made sand remaining on the screen continues to move, making it easier to collect the screened sand and gravel.

[0013] Preferably, the power assembly includes a power gear fastened on the rotating shaft, a gear rod meshing with the power gear, and a hydraulic cylinder fixedly connected to the gear rod, and the gear rod is slidably connected to the outer wall of the screening shell.

[0014] With the above structural design, the hydraulic cylinder moves the gear rod up and down, causing the power gear to rotate forward and reverse at a certain angle, thereby causing the screen frame to rotate forward and reverse at a certain angle, causing the machine-made sand to roll back and forth on the screen.

[0015] Preferably, the screen frames and rotating shafts are provided in plurality, the screen frames are provided on the inner side wall of the screening shell from top to bottom, and intermediate wheels meshing with the power gears are provided between the power gears, and the intermediate wheels are rotatably connected to the screening shell.

[0016] With the above structural design, the mesh sizes of the screens are inconsistent, thus achieving multi-stage screening.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1) This device can screen and grade the sand and gravel into different particle sizes.

[0019] 2) This device makes the machine-made sand roll back and forth on the screen, so that the machine-made sand can be fully screened. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the power assembly of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the discharge port of the utility model;

[0023] Figure 4 This is a structural diagram of the screen frame of the utility model;

[0024] Figure 5 For this utility model Figure 4 A schematic diagram of the structure enlarged in the middle; DETAILED DESCRIPTION

[0025] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 The utility model provides a technical solution: a grading and screening device for machine-made sand, comprising a screen 1, wherein the screen 1 is fixedly connected to the screen frame 11, and the screen frame 11 is fixedly connected to the rotating shaft 2. The rotating shaft 2 is fixedly connected to the center of the screen frame 11 and divides the screen frame equally. Both sides of the rotating shaft 2 are screens 1, and the screen 1 is detachably fixed to the screen frame 11 by bolts. The rotating shaft 2 is rotatably connected to the screening shell 3, and the rotating shaft 2 is driven by a power component that drives its forward and reverse rotation. The screen frame 11 rotates forward and reverse at a certain angle, and the frame of the screen frame 11 slides on the inner side wall of the screening shell 3. In order to match the sliding trajectory of the frame of the screen frame 11, the shell wall of the screening shell 3 in contact with it is an arc-shaped structure.

[0026] An inclined baffle 4 is provided below the screen 1 , and the inclined baffle 4 is fixedly connected to the inner wall of the screening shell 3 . The screening shell 3 is provided with a discharge port 41 corresponding to the lower end of the inclined baffle 4 .

[0027] A slide rail 71 is fixedly connected to the inner wall of the screening shell 3, and a slide groove 72 matching the slide rail 71 is provided on the frame of the screen frame 11. A roller 73 is rotatably connected on the groove wall of the slide groove 72. The slide rail 71 is arc-shaped and the curvature matches the sliding track of the frame of the screen frame 11.

[0028] The screen frame 11 and the rotating shaft 2 are both inclined along their length directions. Along the inclined direction of the screen frame 11 and the rotating shaft 2, a discharge channel 12 for passing the screened material is fixedly connected to the shell wall of the screening shell 3.

[0029] The power assembly includes a power gear 61 tightly sleeved on the rotating shaft 2 , a gear rod 62 meshing with the power gear, and a hydraulic cylinder 63 fixedly connected to the gear rod 62 . The gear rod 62 is slidably connected to the outer wall of the screening shell 3 .

[0030] The screen frame 11 and the rotating shaft 2 are both provided in plurality. The screen frames are arranged on the inner wall of the screening shell 3 from top to bottom. An intermediate wheel 64 meshing with the power gear 61 is provided between the power gears 61. The intermediate wheel 64 is rotatably connected to the screening shell 3.

[0031] The screen frame 11 is arranged from top to bottom, and the mesh sizes of the screens fixed on the screen frame 11 are inconsistent, and the size of the mesh decreases from top to bottom.

[0032] When the device is in use, the first step is for the staff to start the hydraulic cylinder 63, which drives the gear rod 62 to move up and down, causing the power gear 61 meshing with the gear rod 62 to rotate forward and reverse at a certain angle. Since an intermediate wheel 64 meshing with the power gear 61 is provided between the power gears 61, the upper and lower power gears 61 both rotate forward and reverse at a certain angle, thereby causing the rotating shaft 2 to drive the screen frame 11 to rotate forward and reverse at a certain angle. The staff then pours machine-made sand onto the screen 1, and the machine-made sand rolls back and forth on the screen 1.

[0033] The second step is screening. The machine-made sand moves along the inclined direction. The sand and gravel smaller than the sieve holes fall down, and the machine-made sand remaining on the screen 1 continues to move. The screened sand and gravel fall into the hopper through the discharge channel 12.

[0034] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology. They are not used to limit the conditions for the implementation of this utility model and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this utility model without affecting the efficacy and purpose of the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of this utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of this utility model without substantially changing the technical content.

[0035] The present invention has been described above with reference to preferred embodiments. However, the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various improvements may be made to the present invention, and components may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, as long as there are no structural conflicts.

Claims

1. A grading and screening device for machine-made sand, comprising a screen (1), characterized in that: The screen (1) is fixedly connected to the screen frame (11), the screen frame (11) is fixedly connected to the rotating shaft (2), the rotating shaft (2) is rotatably connected to the screening shell (3), the rotating shaft (2) is transmission-connected to a power assembly that drives the rotating shaft (2) to rotate forward and reverse, and the frame of the screen frame (11) slides on the inner side wall of the screening shell (3).

2. The grading and screening device for machine-made sand according to claim 1, characterized in that: An inclined baffle (4) is provided below the screen (1), the inclined baffle (4) being fixedly connected to the inner side wall of the screening shell (3), and a discharge port (41) corresponding to the lower end of the inclined baffle (4) is provided on the screening shell (3).

3. The grading and screening device for machine-made sand according to claim 1, characterized in that: A slide rail (71) is fixedly connected to the inner side wall of the screening shell (3), a slide groove (72) matching the slide rail (71) is provided on the frame of the screen frame (11), and a roller (73) is rotatably connected to the groove wall of the slide groove (72).

4. The grading and screening device for machine-made sand according to claim 1, characterized in that: The screen frame (11) and the rotating shaft (2) are both arranged to be inclined along their length direction. Along the inclined direction of the screen frame (11) and the rotating shaft (2), a discharge channel (12) for passing the screened material is fixedly connected to the shell wall of the screening shell (3).

5. A grading and screening device for machine-made sand according to any one of claims 1 to 4, characterized in that: The power assembly comprises a power gear (61) tightly sleeved on the rotating shaft (2), a gear rod (62) meshing with the power gear, and a hydraulic cylinder (63) fixedly connected to the gear rod (62); the gear rod (62) is slidably connected to the outer wall of the screening shell (3).

6. The grading and screening device for machine-made sand according to claim 5, characterized in that: The screen frames (11) and the rotating shaft (2) are both provided in plurality. The screen frames are provided on the inner side wall of the screening housing (3) from top to bottom. An intermediate wheel (64) meshing with the power gear (61) is provided between the power gears (61). The intermediate wheel (64) is rotatably connected to the screening housing (3).

Images