A spiral screen device for complex media

Abstract

The application discloses a spiral screen device for complex medium, which comprises a rotating shaft divided into a front shaft and a rear shaft, a first driving mechanism for driving the rotating shaft to rotate, a screening cylinder fixedly sleeved outside the front shaft and distributed with screen holes, a first fixed cylinder sleeved outside the screening cylinder, a second fixed cylinder sleeved outside the rear shaft, and spiral propelling blades fixed on the surface of the rotating shaft and used for pushing materials; the front end of the screening cylinder is opened to form a feeding port and is used for the input of materials; the rear end of the second fixed cylinder is opened to form a large-particle discharging port and is used for the output of large-particle materials; the bottom of the first fixed cylinder is provided with a small-particle discharging port; and spiral discharging blades are fixed on the outer surface of the screening cylinder and used for pushing small-particle materials passing through the screen holes into the space between the screening cylinder and the first fixed cylinder to the small-particle discharging port and outputting. The application has the beneficial effect of improving the screening range and the screening efficiency.

Description

Technical Field

[0001] This invention relates to a spiral screen device for complex media, and to the technical field of media screening and separation. Background Technology

[0002] A spiral screen is a device used to separate particles of different sizes from solid materials. It is commonly used in industries such as mining, chemical, and food processing. This device utilizes a spiral structure to achieve the functions of material conveying and screening, and can screen particles of different sizes in the material to be screened.

[0003] Currently, existing spiral screen devices have the following drawbacks: low screening efficiency and small screening range. In particular, the small screening range requires the material to be screened sequentially using multiple devices with different screening ranges, resulting in low industrial efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a spiral screen device for complex media, which improves the screening range and screening efficiency.

[0005] This invention is achieved through the following technical solution.

[0006] A spiral screen device for complex media includes a rotating shaft divided into a front shaft and a rear shaft, a first drive mechanism for driving the rotating shaft to rotate, a screening cylinder fixedly sleeved outside the front shaft and having screen holes, a first fixed cylinder sleeved outside the screening cylinder, a second fixed cylinder sleeved outside the rear shaft, and spiral propulsion blades fixed to the surface of the rotating shaft for pushing materials; the front opening of the screening cylinder is formed as a feed inlet for material input, and the rear opening of the second fixed cylinder is formed as a large particle discharge outlet for large particle material output; a small particle discharge outlet is provided at the bottom of the first fixed cylinder, and spiral discharge blades are fixed on the outer surface of the screening cylinder for pushing small particle materials that enter between the screening cylinder and the first fixed cylinder through the screen holes to the small particle discharge outlet for output.

[0007] As a further improvement of the present invention, the diameter of the screening cylinder is larger than that of the second fixed cylinder, so that an annular gap is formed between the rear end edge of the screening cylinder and the front end edge of the second fixed cylinder, so that the medium-sized particles in the screening cylinder are output through the annular gap.

[0008] As a further improvement of the present invention, a partition is provided inside the first fixed cylinder and at the rear end corresponding to the screening cylinder, dividing the inside of the first fixed cylinder into a first space for accommodating small particles and a second space for accommodating medium particles; a medium particle outlet is provided at the bottom of the first fixed cylinder corresponding to the second space for outputting medium particles; the small particle outlet is located at the bottom of the first fixed cylinder corresponding to the first space.

[0009] As a further improvement of the present invention, the small particle discharge port is close to the front end of the first fixed cylinder, and the spiral direction of the spiral discharge blade is opposite to that of the spiral propulsion blade.

[0010] As a further improvement of the present invention, it also includes a sleeve that is slidably fitted outside the front section of the second fixed cylinder, and a second driving mechanism for driving the sleeve to reciprocate; the reciprocating sliding of the sleeve causes its front end to intermittently enter the screening cylinder through the annular gap, for clearing the annular gap.

[0011] As a further improvement of the present invention, the front end of the sleeve has a flange formed by radial protrusions. The flange slides forward with the sleeve to push large particles of material to avoid clogging the annular gap, and slides backward to push medium particles of material through the annular gap for output.

[0012] As a further improvement of the present invention, the flange is inclined from the inner side to the outer side toward the front end of the screening cylinder.

[0013] As a further improvement of the present invention, the spiral propulsion blade includes a front blade located inside the screening cylinder and a rear blade located inside the second fixed cylinder; the outer side of the front blade is fixedly connected to the inner wall of the screening cylinder.

[0014] As a further improvement of the present invention, the front blade and the rear blade are connected together, and the two are integrally connected structures.

[0015] The beneficial effects of this invention are:

[0016] The sieving range of the spiral screen device has been improved, thus its functionality and adaptability are strong, and it can finely separate different components in the application industry. Attached Figure Description

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings to aid in understanding the objectives and advantages of the present invention, wherein:

[0018] Figure 1 This is a cross-sectional schematic diagram of the spiral screen device;

[0019] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0020] Figure 3 This is a schematic diagram of a helical propulsion blade. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the construction shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0023] A spiral screen device for complex media, referenced Figure 1-3 It includes a rotating shaft 1, a first drive mechanism, a screening cylinder 2, a first fixed cylinder 3, a second fixed cylinder 4, a spiral propulsion blade 5, and a spiral discharge blade 6. It should be noted that in this embodiment, the direction of material propulsion within the spiral screen device is taken as the positive direction, thus defining the front and rear.

[0024] The rotating shaft 1 is basically horizontally positioned and is driven by a first drive mechanism to rotate around its own axis. The rotating shaft 1 is divided into two parts: a front shaft 11 and a rear shaft 12. The front shaft 11 is the front half of the rotating shaft 1, and the rear shaft 12 is the rear half. Spiral propulsion blades 5 are fixed to the surface of the rotating shaft 1 and are used to propel and convey materials, continuously pushing them from front to back. A screening cylinder 2 is fixedly sleeved outside the front shaft 11 and can rotate synchronously with the rotating shaft 1. The screening cylinder 2 has screen holes 21, which are generally evenly distributed to improve the uniformity of screening. The aperture of the screen holes 21 matches the small particles to be screened, ensuring that only small particles can pass through the screen holes 21. Spiral discharge blades 6 are fixed to the outer surface of the screening cylinder 2. The first fixed cylinder 3 is fitted outside the screening cylinder 2, and a small particle outlet b1 is provided at the bottom of the first fixed cylinder 3. The second fixed cylinder 4 is fitted outside the rear half shaft. Both the first fixed cylinder 3 and the second fixed cylinder 4 are fixed cylindrical structures. The front opening of the screening cylinder 2 is formed as the feed inlet a, and the rear opening of the second fixed cylinder 4 is formed as the large particle outlet a2.

[0025] In this embodiment, the material to be screened is fed into the screening cylinder 2 through the feed inlet a. Under the rotation of the shaft 1, the spiral propulsion blades 5 continuously push the material from back to front. Small particles pass through the screen holes 21 in the screening cylinder 2 and enter the space between the screening cylinder 2 and the first fixed cylinder 3. Then, under the push of the spiral discharge blades 6, the small particles are pushed to the small particle discharge port b1 of the first fixed cylinder 3 and output. Large particles cannot pass through the screen holes 21 and continue to be conveyed forward under the push of the spiral propulsion blades 5 and enter the second fixed cylinder 4, and are finally output from the large particle discharge port a2 of the second fixed cylinder 4.

[0026] In this embodiment, by setting the screening cylinder 2, small particles can be screened out from the material, so that small particles and large particles can be separated well. Furthermore, under the action of the spiral propulsion blades 5, the material can be centrifugally diffused while being propelled forward, so that the material can fully contact the inner wall of the screening cylinder 2. This allows the small particles to pass through the screen holes 21 efficiently and be screened out. It should be noted that the length of the screening cylinder 2 should be reasonably set according to the actual application requirements, and it should be ensured that the small particles are screened out by the screen holes 21 before the material is pushed to the second fixed cylinder 4.

[0027] In this embodiment, the diameter of the screening cylinder 2 is larger than that of the second fixed cylinder 4, so that an annular gap s is formed between the rear end edge of the screening cylinder 2 and the front end edge of the second fixed cylinder 4. The actual width of the annular gap s is between the size of large particles and small particles, so that when the material in the screening cylinder 2 is pushed forward, medium particles can be output through the annular gap s, thereby enabling the screening of medium and large particles.

[0028] The spiral screen device in this embodiment, based on the setting of the screening cylinder 2 and the annular gap s, can screen three different sizes of materials: large particles, medium particles and small particles, thereby improving the screening range of the spiral screen device. Therefore, it has strong functionality and adaptability and can finely separate different components in the application industry.

[0029] For the output of medium-sized particles, in this embodiment, the rear end of the first fixed cylinder 3 is located behind the rear end of the screening cylinder 2. A partition plate is installed inside the first fixed cylinder 3, corresponding to the rear end of the screening cylinder 2. The partition plate divides the space inside the first fixed cylinder 3 into two parts: a first space r1 at the front to accommodate small particles, and a second space r2 at the rear to accommodate medium-sized particles. This allows small particles to enter the first space r1 through the screen holes 21, while medium-sized particles enter the second space r2 through the annular gap s. A small particle outlet b1 is located at the bottom of the first fixed cylinder 3 corresponding to the first space r1, allowing small particles to be output through the small particle outlet b1 after entering the first space r1 under the action of the spiral discharge blades 6. A medium particle outlet a3 is located at the bottom of the first fixed cylinder 3 corresponding to the second space r2 for the output of medium-sized particles.

[0030] In this embodiment, the spiral screen device is equipped with a receiving container (not shown in the figure) below the small particle outlet a3, the medium particle outlet a3, and the large particle outlet a2, which is used to collect the materials that fall from each outlet.

[0031] In this embodiment, the small particle outlet b1 is located near the front end of the first fixed cylinder 3, and the spiral direction of the spiral discharge blade 6 is opposite to that of the spiral propulsion blade 5. Positioning the small particle outlet b1 near the front end of the first fixed cylinder 3 ensures a sufficient distance between the small particle outlet b1 and the medium particle outlet a3, preventing difficulties in placing the receiving container used to contain both. Because the spiral direction of the spiral discharge blade 6 is opposite to that of the spiral propulsion blade 5, the spiral discharge blade 6 can push the material in the screening cylinder 2 from front to back, and the spiral discharge blade 6 can push the small particle material from back to front to the small particle outlet b1.

[0032] The spiral screen device in this embodiment also includes a sleeve 7 and a second drive mechanism. The sleeve 7 is slidably fitted onto the front section of the second fixed cylinder 4, with its inner wall adhering to the outer wall of the second fixed cylinder 4. The sleeve 7 can reciprocate along the axial direction of the rotating shaft 1. The second drive mechanism drives the reciprocating sliding of the sleeve 7. The reciprocating sliding of the sleeve 7 allows its front end to intermittently enter the screening cylinder 2 through the annular gap s. Because the diameter of the screening cylinder 2 is larger than that of the second fixed cylinder 4, a stepped structure is formed at their connection. This makes it easy for material to get stuck at the connection between the screening cylinder 2 and the second fixed cylinder 4 during the pushing process by the spiral propulsion blades 5, thus hindering the passage of medium-sized particles through the annular gap s. Therefore, the reciprocating sliding of the sleeve 7 can clear the annular gap s, thereby preventing it from being blocked by large particles.

[0033] In this embodiment, the front section of the sleeve 7 has a radially protruding flange 71. The gap between the outer edge of the flange 71 and the inner wall of the screening cylinder 2 is the actual passable gap of the annular gap s mentioned earlier. That is to say, the gap between the outer edge of the flange 71 and the inner wall of the screening cylinder 2 needs to be between the size of large and small particles, corresponding to the size of medium particles. The forward sliding of the flange 71 with the sleeve 7 is used to push large particles to avoid clogging the annular gap s, and the backward sliding is used to push medium particles through the annular gap s for output. This not only improves the overall effect of clearing the annular gap s, but also improves the output efficiency of medium particles through the annular gap s.

[0034] In this embodiment, the flange 71 is inclined from the inner side to the outer side towards the front end of the screening cylinder 2. The inclined setting of the flange 71 allows the sleeve 7 to push large particles of material as it slides forward. In addition, with the cooperation of the spiral propulsion blade 5, large particles of material can enter the second fixed cylinder 4 more easily, thereby improving the pushing efficiency of large particles of material.

[0035] In this embodiment, the helical propulsion blade 5 includes a front blade 51 located inside the screening cylinder 2 and a rear blade 52 located inside the second fixed cylinder 4; the outer side of the front blade 51 is fixedly connected to the inner wall of the screening cylinder 2. The front blade 51 and the rear blade 52 are connected together and are an integral connection structure.

[0036] In this embodiment, the first drive mechanism is located behind the second fixed cylinder 4 and includes a reduction motor 81 and a transmission gear set 82, which drives the reduction motor 81 and the rotating shaft 1. The second drive mechanism includes a coupling 93 fixed to the reduction motor 91, the drive column 92, and driving the reduction motor 91 and the drive column 92. The drive column 92 is provided with a circumferentially inclined mating groove 921, and the sleeve 7 is provided with a fixing rod 72, which is inserted into the mating groove 921.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention 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 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 the present invention.

Claims

1. A screw screen apparatus for complex media, characterized by, The utility model discloses a rotary shaft including the front shaft and rear shaft, the first drive mechanism for driving the rotary shaft rotation, the screen cylinder fixedly sleeved outside the front shaft and distributed with the screen hole, the first fixed cylinder sleeved outside the screen cylinder, the second fixed cylinder sleeved outside the rear shaft, the spiral propelling blade fixed on the rotary shaft surface and used for pushing the material, the front end of the screen cylinder is opened and forms the feeding port and is used for the input of material, the rear end of the second fixed cylinder is opened and forms the large particle discharge port and is used for the output of large particle material, the bottom of the first fixed cylinder is provided with the small particle discharge port, the spiral discharge blade is fixed on the surface outside the screen cylinder and is used for pushing the small particle material between the screen cylinder and the first fixed cylinder to the small particle discharge port and output, the diameter of the screen cylinder is greater than the second fixed cylinder, so that the annular gap is formed between the rear end edge of the screen cylinder and the front end edge of the second fixed cylinder, so that the medium particle material in the screen cylinder is output by the annular gap, the baffle is arranged in the first fixed cylinder and corresponds the rear end of the screen cylinder, and the first fixed cylinder is divided into the first space containing the small particle material and the second space containing the medium particle material, the first fixed cylinder is provided with the medium particle discharge port at the bottom corresponding the second space, and is used for the output of medium particle material, the small particle discharge port is arranged at the bottom of the first fixed cylinder corresponding the first space, and the sleeve is slidably sleeved on the front section of the second fixed cylinder, and the second drive mechanism is used for driving the sleeve reciprocating sliding, the reciprocating sliding of the sleeve makes the front end of the sleeve enter the screen cylinder from the annular gap intermittently, and is used for dredging the annular gap, the front end of the sleeve has the flange formed by the radial protrusion, the flange is used for pushing the large particle material to avoid the large particle material from blocking the annular gap when the sleeve slides forward, and is used for pushing the medium particle material to output through the annular gap when the sleeve slides backward.

2. The auger screen apparatus for complex media of claim 1, wherein, The small particle discharge port is close to the front end of the first fixed cylinder, and the spiral direction of the spiral discharge blade is opposite to the spiral propelling blade.

3. The auger screen apparatus for complex media of claim 1, wherein, The flange is arranged to be inclined towards the front end of the screen cylinder from the inner side to the outer side.

4. The auger screen apparatus for complex media of claim 1, wherein, The spiral propelling blade includes the front blade in the screen cylinder and the rear blade in the second fixed cylinder, and the outer side of the front blade is fixedly connected with the inner cylinder wall of the screen cylinder.

5. The auger screen apparatus for complex media of claim 4, wherein, The front blade and the rear blade are connected and are integrally connected. The utility model discloses a rotary shaft including the front shaft and rear shaft, the first drive mechanism for driving the rotary shaft rotation, the screen cylinder fixedly sleeved outside the front shaft and distributed with the screen hole, the first fixed cylinder sleeved outside the screen cylinder, the second fixed cylinder sleeved outside the rear shaft, the spiral propelling blade fixed on the rotary shaft surface and used for pushing the material, the front end of the screen cylinder is opened and forms the feeding port and is used for the input of material, the rear end of the second fixed cylinder is opened and forms the large particle discharge port and is used for the output of large particle material, the bottom of the first fixed cylinder is provided with the small particle discharge port, the spiral discharge blade is fixed on the surface outside the screen cylinder and is used for pushing the small particle material between the screen cylinder and the first fixed cylinder to the small particle discharge port and output, the diameter of the screen cylinder is greater than the second fixed cylinder, so that the annular gap is formed between the rear end edge of the screen cylinder and the front end edge of the second fixed cylinder, so that the medium particle material in the screen cylinder is output by the annular gap, the baffle is arranged in the first fixed cylinder and corresponds the rear end of the screen cylinder, and the first fixed cylinder is divided into the first space containing the small particle material and the second space containing the medium particle material, the first fixed cylinder is provided with the medium particle discharge port at the bottom corresponding the second space, and is used for the output of medium particle material, the small particle discharge port is arranged at the bottom of the first fixed cylinder corresponding the first space, and the sleeve is slidably sleeved on the front section of the second fixed cylinder, and the second drive mechanism is used for driving the sleeve reciprocating sliding, the reciprocating sliding of the sleeve makes the front end of the sleeve enter the screen cylinder from the annular gap intermittently, and is used for dredging the annular gap, the front end of the sleeve has the flange formed by the radial protrusion, the flange is used for pushing the large particle material to avoid the large particle material from blocking the annular gap when the sleeve slides forward, and is used for pushing the medium particle material to output through the annular gap when the sleeve slides backward. The small particle discharge port is close to the front end of the first fixed cylinder, and the spiral direction of the spiral discharge blade is opposite to the spiral propelling blade. The flange is arranged to be inclined towards the front end of the screen cylinder from the inner side to the outer side. The spiral propelling blade includes the front blade in the screen cylinder and the rear blade in the second fixed cylinder, and the outer side of the front blade is fixedly connected with the inner cylinder wall of the screen cylinder. The front blade and the rear blade are connected and are integrally connected.

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