Roller screening equipment

Abstract

The utility model provides drum screening equipment, which relates to the technical field of sandstone aggregate screening production equipment, comprises a drum frame, a spiral drum, an outer shaft, an inner shaft, a first driving device and a second driving device, and solves the problems that fine sand soil blocks screen holes in the rotary screening process of a spiral drum screen, and the screening efficiency is high in the prior art. Therefore, the problem that the fine aggregate is not thoroughly screened and is discharged along with the coarse aggregate is solved. Compared with the prior art, the spiral roller is rotationally arranged in the mounting cavity through the outer shaft, the inner shaft is concentrically arranged in the outer shaft in a penetrating mode, the eccentric blocks are arranged on the inner shaft at intervals in the length direction of the inner shaft, and the first driving device is in transmission connection with the roller driving shaft; the second driving device drives the inner shaft and the eccentric block on the inner shaft to rotate in the outer shaft to generate eccentric vibration, fine sand soil blocking the screen holes on the spiral roller is oscillated to fall off, the fine sand soil is prevented from blocking the screen holes in the screening process, and the screening precision of fine aggregate and coarse aggregate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand and gravel aggregate screening production equipment, and specifically relates to a drum screening device. Background Art

[0002] In the process of extracting sand and gravel aggregates, it is necessary to screen the fine aggregates with a smaller mesh size in the sand and gravel aggregates. Specifically, the crushed sand and gravel aggregates are put into a spiral drum screen. Under the action of the spiral drum screen, the sand and gravel aggregates move centrifugally along a spiral track. During this process, the fine aggregates smaller than the screen aperture are screened out for collection and treatment, and the coarse aggregates larger than the screen aperture gradually move centrifugally along the spiral to the discharge port.

[0003] In the prior art, the crushed sand and gravel aggregates contain fine sand and soil. When they are put into the spiral drum screen roller for screening, due to the viscosity of the fine sand and soil, the screen holes will be blocked during the rotation and screening of the spiral drum screen, resulting in incomplete screening of the fine aggregates, and they will be discharged together with the coarse aggregates. Content of the Utility Model

[0004] The purpose of the utility model is to provide a drum screening device, aiming to solve the problem that in the prior art, the fine sand and soil will block the screen holes during the rotation and screening of the spiral drum screen, resulting in incomplete screening of the fine aggregates and being discharged together with the coarse aggregates.

[0005] In order to achieve the above purpose, the utility model provides a drum screening device, including:

[0006] A drum frame, on which an installation cavity is provided;

[0007] A spiral drum, rotatably arranged in the installation cavity, and the circumferential side wall of the spiral drum is covered with screen holes;

[0008] An outer shaft, concentrically arranged inside the spiral drum, with a first coupling end cover and a second coupling end cover fixedly connected to both ends of the outer shaft. The first coupling end cover and the second coupling end cover are connected to the drum frame through bearing seats, and a drum drive shaft is provided on the second coupling end cover;

[0009] An inner shaft, concentrically passing through the inside of the outer shaft. A connecting bearing is provided between the inner shaft and the outer shaft. Both ends of the inner shaft are respectively connected inside the first coupling end cover and the second coupling end cover through bearings, and the first end of the inner shaft penetrates through the first coupling end cover;

[0010] Eccentric blocks, arranged at intervals along the length direction of the inner shaft and located inside the outer shaft;

[0011] A first driving device, arranged on the drum frame, and the first driving device is drivingly connected to the drum drive shaft;

[0012] A second driving device is arranged on the roller frame, and the second driving device is drivingly connected to the first end of the inner shaft.

[0013] Furthermore, the spiral roller comprises a roller body, a roller fixing ring, a support rod and a spiral blade. The roller fixing rings are arranged at intervals inside the roller body and are in close contact with the inner wall of the roller body. The support rods are connected around between the roller fixing rings and the outer shaft. The spiral blades are arranged on the inner wall of the roller body and are arranged avoiding the support rods.

[0014] Furthermore, the roller body is at least composed of two roller segments. At least two groups of the roller fixing rings, support rods and spiral blades are arranged in each roller segment. Each roller segment is connected to the outer shaft through the roller fixing rings and the support rods.

[0015] Furthermore, at least two sections are provided for the outer shaft and the inner shaft. Between each section of the outer shaft are connected through a bearing flange, and the head and tail of each section of the inner shaft are inserted and connected to each other.

[0016] Furthermore, a feed inlet is arranged at one end of the spiral roller, and a discharge outlet is arranged at the other end of the spiral roller. A blanking hopper is arranged on the roller frame below the discharge outlet.

[0017] Furthermore, a water pipe is arranged obliquely above the spiral roller on the roller frame, and a plurality of spray pipes facing the spiral roller are arranged at intervals on the water pipe.

[0018] Furthermore, a blanking opening is formed at the bottom of the installation cavity.

[0019] The advantages of the present utility model are as follows: Compared with the prior art, the spiral roller is rotatably arranged in the installation cavity through the outer shaft, the inner shaft is concentrically arranged inside the outer shaft, the eccentric blocks are arranged at intervals along the length direction of the inner shaft on the inner shaft, the first driving device is drivingly connected to the roller driving shaft, and the second driving device is drivingly connected to the first end of the inner shaft, driving the inner shaft and the eccentric blocks on the inner shaft to rotate inside the outer shaft to generate eccentric vibration, oscillating and falling off the fine sand and soil blocking the sieve holes on the spiral roller, preventing the fine sand and soil from blocking the sieve holes during the screening process, and improving the screening accuracy of fine aggregates and coarse aggregates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the roller screening device of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the roller screening device of the present utility model from another perspective;

[0022] Figure 3Schematic cross-sectional structure diagram of the drum screening equipment of the present utility model;

[0023] Figure 4 is Figure 3 Enlarged structure diagram of part A in

[0024] Explanation of reference numerals

[0025] 10 - Drum frame; 11 - Installation cavity; 12 - Feed inlet; 13 - Discharge outlet; 14 - Hopper; 15 - Discharge opening; 16 - Water pipe; 17 - Water spray pipe;

[0026] 20 - Screw drum; 21 - Sieve holes; 22 - Drum body; 23 - Drum fixing ring; 24 - Support rod; 25 - Screw blade;

[0027] 30 - Outer shaft; 31 - First coupling end cover; 32 - Second coupling end cover; 33 - Drum drive shaft;

[0028] 40 - Inner shaft; 41 - Connecting bearing;

[0029] 50 - Eccentric block; 60 - First driving device; 70 - Second driving device. Detailed implementation manners

[0030] The present utility model will be described in detail below in conjunction with specific embodiments.

[0031] In the present utility model, when orientation terms appear, these orientation terms are for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0032] In the present utility model, unless otherwise clearly specified and defined, when terms such as "arranged on", "connected", "coupled" appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or connected through an intermediate medium, and can be internally connected and communicated between two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] As Figures 1 to 4 shown, the present utility model discloses a drum screening equipment, including a drum frame 10, a screw drum 20, an outer shaft 30, an inner shaft 40, a first driving device 60 and a second driving device 70.

[0034] The drum frame 10 is provided with an installation cavity 11, and a discharge opening 15 is opened at the bottom of the installation cavity 11 for discharging fine aggregate.

[0035] The spiral drum 20 is rotatably arranged in the installation cavity 11. The circumferential side wall of the spiral drum 20 is covered with sieve holes 21, which are used to screen out fine aggregates through the sieve holes 21 during the rotation of the spiral drum 20.

[0036] The outer shaft 30 is concentrically arranged inside the spiral drum 20. Both ends of the outer shaft 30 are fixedly connected with a first coupling end cover 31 and a second coupling end cover 32. The first coupling end cover 31 and the second coupling end cover are connected to the drum frame 10 through a bearing seat. A drum drive shaft 33 is provided on the second coupling end cover, so that the spiral drum 20 can rotate on the drum frame 10 to screen coarse and fine aggregates.

[0037] The inner shaft 40 is concentrically inserted inside the outer shaft 30. A connecting bearing 41 is provided between the inner shaft 40 and the outer shaft 30. Both ends of the inner shaft 40 are respectively connected inside the first coupling end cover 31 and the second coupling end cover 32 through bearings. The first end of the inner shaft 40 penetrates through the first coupling end cover 31, so that the inner shaft 40 can rotate inside the outer shaft 30 without interfering with the rotation of the outer circumference.

[0038] The eccentric blocks 50 are arranged on the inner shaft 40 at intervals along the length direction of the inner shaft 40 and are located inside the outer shaft 30. When the inner shaft 40 drives the eccentric blocks 50 to rotate inside the outer shaft 30, eccentric vibration is generated and conducted to the entire spiral drum 20 through the outer shaft 30, so as to oscillate and shed the soil blocked in the sieve holes 21 and dredge the sieve holes 21. The mesh number of the sieve holes 21 is 5 to 10 meshes.

[0039] The first driving device 60 is arranged on the drum frame 10. The first driving device 60 is in transmission connection with the drum drive shaft 33 to provide rotational power for the outer shaft 30 to drive the spiral drum 20. The first driving device 60 is a reduction motor.

[0040] The second driving device 70 is arranged on the drum frame 10. The second driving device 70 is in transmission connection with the first end of the inner shaft 40 to drive the eccentric blocks 50 on the inner shaft 40 to rotate inside the outer shaft 30 to generate vibration. The second driving device 70 is a motor and a belt pulley transmission mechanism.

[0041] During specific implementation, the sand and gravel aggregates are fed into one end of the screw drum. The first driving device 60 drives the outer shaft 30 and the spiral drum 20 to rotate to perform spiral rolling feeding on the sand and gravel aggregates. During the rolling process, the first driving device 60 drives the outer shaft 30 to drive the whole spiral drum 20 to rotate. The second driving device 70 drives the inner shaft 40 and the eccentric blocks 50 to rotate inside the outer shaft 30. Through the vibration generated by the eccentric blocks 50, it is prevented that the sieve holes 21 are blocked by fine sand and soil, and the fine aggregates are screened and discharged through the sieve holes 21 to ensure the accuracy of the coarse and fine aggregates during the screening process.

[0042] In this embodiment, the spiral drum 20 includes a drum body 22, a drum fixing ring 23, a support rod 24, and a spiral blade 25. The drum fixing ring 23 is disposed at intervals inside the drum body 22 and is in close contact with the inner wall of the drum body 22. The support rod 24 is connected around between the drum fixing ring 23 and the outer shaft 30. The spiral blade 25 is disposed on the inner wall of the drum body 22 and is arranged to avoid the support rod 24.

[0043] In specific implementation, the spiral drum 20 is composed of the drum body 22, the drum fixing ring 23, the support rod 24, and the spiral blade 25. The drum fixing ring 23 strengthens the overall strength of the drum body 22, bends and connects the drum body 22, connects the drum body 22 and the outer shaft 30 through the support rod 24, and the spiral blade 25 is connected to the inner wall of the drum body 22 to screen and feed the sand and gravel aggregate.

[0044] In this embodiment, the drum body 22 is at least composed of two drum segments. At least two sets of the drum fixing ring 23, the support rod 24, and the spiral blade 25 are provided in each drum segment. Each drum segment is connected to the outer shaft 30 through the drum fixing ring 23 and the support rod 24, splitting the overall length of the drum body 22 for convenient processing and production.

[0045] In this embodiment, the outer shaft 30 and the inner shaft 40 are at least provided with two segments. Each segment of the outer shaft 30 is connected by a bearing flange, and the head and tail of each segment of the inner shaft 40 are plugged and connected to adapt to the connection of the drum body 22.

[0046] In this embodiment, at least two sets of eccentric blocks 50 are provided. The two sets of eccentric blocks 50 are arranged at intervals near the center of the inner shaft 40. Each set of eccentric blocks 50 is composed of multiple semi-circular blocks stacked together, so that the inner shaft 40 drives the eccentric blocks 50 to rotate to generate eccentric vibration, causing the spiral drum 20 to vibrate during rotation, oscillating and removing the soil on the sieve holes 21 to avoid blocking the sieve holes 21.

[0047] In this embodiment, a feed inlet 12 is provided at one end of the spiral drum 20, and a discharge outlet 13 is provided at the other end of the spiral drum 20. A blanking hopper 14 is provided on the drum rack 10 below the discharge outlet 13 to facilitate the discharge of the screened coarse aggregate.

[0048] In this embodiment, a water pipe 16 is provided on the drum rack 10 obliquely above the spiral drum 20. A plurality of spray water pipes 17 facing the spiral drum 20 are provided at intervals on the water pipe 16, so as to wash away the fine sand and soil attached to the screened coarse aggregate and ensure the accuracy of screening.

[0049] Without conflict, the above embodiments and the features in the embodiments can be combined with each other.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model.

Claims

1. A drum screening device, characterized in that, Comprising: A drum rack, on which an installation cavity is provided; A spiral drum, rotatably arranged in the installation cavity, and the circumferential side wall of the spiral drum is covered with sieve holes; An outer shaft, concentrically arranged inside the spiral drum, and both ends of the outer shaft are fixedly connected with a first coupling end cover and a second coupling end cover. The first coupling end cover and the second coupling end cover are connected to the drum rack through a bearing seat, and a drum drive shaft is provided on the second coupling end cover; An inner shaft, concentrically passing through the inside of the outer shaft. A connecting bearing is provided between the inner shaft and the outer shaft. Both ends of the inner shaft are respectively connected inside the first coupling end cover and the second coupling end cover through bearings, and the first end of the inner shaft penetrates through the first coupling end cover; Eccentric blocks, arranged at intervals along the length direction of the inner shaft and located inside the outer shaft; A first driving device, arranged on the drum rack, and the first driving device is drivingly connected to the drum drive shaft; A second driving device, arranged on the drum rack, and the second driving device is drivingly connected to the first end of the inner shaft.

2. The drum screening device according to claim 1, characterized in that, The spiral drum includes a drum body, a drum fixing ring, a support rod and a spiral blade. The drum fixing rings are arranged at intervals inside the drum body and are in close contact with the inner wall of the drum body. The support rods are circumferentially connected between the drum fixing rings and the outer shaft. The spiral blades are arranged on the inner wall of the drum body and are arranged to avoid the support rods.

3. A drum screening device according to claim 2, characterized in that, The drum body is at least composed of two drum segments. At least two groups of the drum fixing rings, support rods and spiral blades are provided in each drum segment. Each drum segment is connected to the outer shaft through the drum fixing rings and support rods.

4. A drum screening device according to claim 3, characterized in that, At least two sections are provided for the outer shaft and the inner shaft. Each section of the outer shaft is connected by a bearing flange, and the head and tail of each section of the inner shaft are inserted and connected.

5. A drum screening device according to claim 1, characterized in that, At least two groups of the eccentric blocks are provided, and the two groups of eccentric blocks are arranged at intervals close to the center of the inner shaft.

6. The drum screening device according to claim 5, characterized in that, Each group of the eccentric blocks is composed of multiple semicircular blocks stacked together.

7. A drum screening device according to claim 1, characterized in that, One end of the spiral drum is provided with a feed inlet, and the other end of the spiral drum is provided with a discharge outlet. A blanking hopper is provided on the drum rack below the discharge outlet.

8. A drum screening device according to claim 1, characterized in that, The mesh number of the sieve holes is from 5 mesh to 10 mesh.

9. A drum screening device according to claim 1, characterized in that, A water pipe is provided on the drum rack obliquely above the spiral drum, and a plurality of spray water pipes facing the spiral drum are provided at intervals on the water pipe.

10. A drum screening device according to claim 1, characterized in that, A blanking port is opened at the bottom of the installation cavity.

Images