A screening device

Abstract

The present application relates to a kind of screening devices, it includes vibrating screen and baffle, the vibrating screen is provided with screen hole, the baffle is fixedly arranged in the position below the screen hole of the vibrating screen, the distance of the baffle to the screen hole is adapted to the diameter of the screen hole, so that the long strip-shaped particle with diameter less than the screen hole and length greater than the screen hole is clamped in the position between the screen hole and the baffle;By being fixedly arranged in the position below the screen hole of the vibrating screen by the baffle provided, the distance of the baffle to the screen hole is adapted to the diameter of the screen hole, long strip-shaped particle is intercepted by baffle after passing through screen hole, at this time, the bottom of long strip-shaped particle is in contact with baffle, and the upper portion of long strip-shaped particle is located in screen hole, to realize the function of intercepting long strip-shaped particle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of granule screening, in particular to a screening device. BACKGROUND

[0002] After the pelletizer cuts the material strip extruded by the extruder into granules, the screening device screens out granules of the required diameter.

[0003] For example, the utility model patent with the application number CN202021470202.X proposes a nylon granule screening device, which comprises a screen frame, the screen frame is provided with a screen plate with a plurality of screen holes, characterized in that the screen frame is provided with a screening chamber and a discharging chamber located at the top and bottom of the screen plate, the first end of the screening chamber is provided with a feeding port, the feeding port and the screen plate are provided with a guide shell connected with the screen frame, the guide shell is connected with the feeding port and the screen frame on both sides, and a plurality of guide plates are symmetrically arranged in the guide shell; the tail ends of the screening chamber and the discharging chamber are respectively provided with a first discharging shell and a second discharging shell connected with the screen frame and staggered, the first discharging shell is located at the top of the second discharging shell, and the inner side walls of the first discharging shell and the second discharging shell are arranged in a staggered manner; at least two parallel support frames are arranged on both sides of the screen frame, springs are vertically arranged on the support frames, the screen frame and the support frame are arranged in a staggered manner, and at least one vibration exciter is arranged at the bottom of the screen frame.

[0004] However, part of the granules are in the form of long strips, specifically, the diameter of the long strip granules is smaller than the screen hole, and the length of the long strip granules is slightly larger than the diameter, the long strip granules will pass through the screen hole under the action of vibration, so that the screened granules have defects. SUMMARY

[0005] Therefore, it is necessary to provide a screening device to solve the problem that part of the granules are in the form of long strips, specifically, the diameter of the long strip granules is smaller than the screen hole, and the length of the long strip granules is slightly larger than the diameter, the long strip granules will pass through the screen hole under the action of vibration, so that the screened granules have defects.

[0006] The present application provides a screening device, which comprises a vibrating screen and a blocking plate, the vibrating screen is provided with a screen hole with a diameter larger than that of the granules, the blocking plate is fixedly arranged below the screen hole of the vibrating screen, the distance from the blocking plate to the screen hole is matched with the diameter of the screen hole, so that the granules with a diameter larger than the screen hole are clamped at the position between the screen hole and the blocking plate.

[0007] Further, the vibrating screen comprises a screen, a vibration source, a material frame and an elastic member, the screen is arranged obliquely and is arranged above the material frame, the screen is connected with the material frame through the elastic member, the vibration source is installed on the screen, and the blocking plate is fixedly arranged at the bottom of the screen.

[0008] Further, the screen holes are arranged in a matrix array on the screen, the number of the blocking plates is multiple, the blocking plates are arranged along the oblique direction of the screen in sequence, each blocking plate is arranged across the screen and faces the screen hole of the screen, and the spacing between two adjacent blocking plates is greater than the diameter of the screen hole.

[0009] Further, two side plates are further arranged, and the two side plates are fixedly arranged on both sides of the screen along the oblique direction of the screen.

[0010] Further, a material returning assembly is further arranged, the material returning assembly is fixedly arranged on the side of the blocking plate away from the vibrating screen, the material returning assembly has a pushing end, the pushing end moves along the direction close to or away from the screen hole, and the movement path of the pushing end passes through the screen hole.

[0011] Further, the material returning assembly comprises a horizontal plate, a top column and a driving member, the horizontal plate is arranged on the side of the blocking plate away from the vibrating screen, the horizontal plate is slidably connected with the blocking plate along the direction close to or away from the screen hole, the top column is fixedly arranged on the side of the horizontal plate close to the blocking plate, the top column forms the pushing end, the driving member is fixedly connected with the horizontal plate, and the output end of the driving member is connected with the blocking plate, so as to drive the horizontal plate to slide.

[0012] Further, the material returning assembly further comprises a limiting member, the limiting member comprises a limiting rod, a first limiting block and a second limiting block, one end of the limiting rod is fixedly connected with the blocking plate, the other end of the limiting rod passes through the horizontal plate and is fixedly connected with the first limiting block, and the second limiting block is fixedly arranged on the side of the blocking plate close to the horizontal plate; when the top column does not pass through the blocking plate, the horizontal plate can abut against the first limiting block; when the top column sequentially passes through the blocking plate and the screen hole, the horizontal plate abuts against the second limiting block.

[0013] Further, the limiting member is arranged on both sides of each horizontal plate.

[0014] Further, the control material assembly includes a material bin and an inclined plate, the material bin is arranged at the feeding end of the vibrating screen, the top of the material bin is open, the material bin is provided with a feeding port near one side of the vibrating screen, the feeding end of the vibrating screen is arranged on the feeding port of the material bin, the inclined plate is inclined downward in the direction close to the vibrating screen, the inclined plate is arranged in the material bin, the inclined plate is in sliding and sealing connection with the material bin in the vertical direction, and the inclined plate can slide to the position in abutment with the vibrating screen.

[0015] Further, the control material assembly includes a material bin and an inclined plate, the material bin is arranged at the feeding end of the vibrating screen, the top of the material bin is open, the material bin is provided with a feeding port near one side of the vibrating screen, the feeding end of the vibrating screen is arranged on the feeding port of the material bin, the inclined plate is inclined downward in the direction close to the vibrating screen, the inclined plate is arranged in the material bin, the inclined plate is in sliding and sealing connection with the material bin in the vertical direction, and the inclined plate can slide to the position in abutment with the vibrating screen.

[0016] Compared with the prior art, the granules to be screened are introduced onto the vibrating screen, and the vibrating screen is vibrated, so that the granules with a diameter greater than the screen hole are located above the vibrating screen, and the granules with a diameter less than the screen hole pass through the screen hole and are located below the vibrating screen, thereby realizing the function of screening the granules. The diameter of part of the long strip-shaped granules is less than the screen hole, and the length of the long strip-shaped granules is slightly greater than the diameter. In order to avoid the long strip-shaped granules from being mixed with the granules below the vibrating screen, the blocking plate is fixed below the screen hole of the vibrating screen, the distance from the blocking plate to the screen hole is matched with the diameter of the screen hole, and the long strip-shaped granules are intercepted by the blocking plate after passing through the screen hole. At this time, the bottom of the long strip-shaped granules is in contact with the blocking plate, and the upper part of the long strip-shaped granules is located in the screen hole, thereby realizing the function of intercepting the long strip-shaped granules. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The overall structural schematic diagram of the screening device provided by the embodiment of the present application is shown in the figure.

[0018] Figure 2 The structural schematic diagram of the material returning assembly in the screening device provided by the embodiment of the present application is shown in the figure.

[0019] Figure 3 The structural schematic diagram of the position where the long strip-shaped granules are clamped between the screen hole and the blocking plate in the screening device provided by the embodiment of the present application is shown in the figure.

[0020] Figure 4 The structural schematic diagram of the position where the long strip-shaped granules are clamped between the screen hole and the blocking plate in the screening device provided by the embodiment of the present application is shown in the figure.

[0021] Figure 5 The structural schematic diagram of the vibrating screen in the screening device provided by the embodiment of the present application is shown in the figure.

[0022] Figure 6 The structural schematic diagram of the control material assembly in the screening device provided by the embodiment of the present application is shown in the figure.

[0023] Figure 7A structure diagram of the screen device is provided. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings, which form a part of this application. The accompanying drawings and the detailed description below are intended to explain the principles of the application, and are not intended to limit the scope of the application.

[0025] As shown in Figure 1 and Figure 3 The screen device provided by the present application comprises a vibrating screen 100 and a blocking plate 200. The vibrating screen 100 is provided with a screen hole 111. The blocking plate 200 is fixedly arranged below the screen hole 111 of the vibrating screen 100. The distance between the blocking plate 200 and the screen hole 111 is matched with the diameter of the screen hole 111, so that the long strip-shaped particles with a diameter smaller than the screen hole 111 and a length greater than the screen hole 111 are clamped between the screen hole 111 and the blocking plate 200.

[0026] In the implementation, the particles to be screened are introduced into the vibrating screen 100. Through the vibration of the vibrating screen 100, the particles with a diameter greater than the screen hole 111 are located above the vibrating screen 100, and the particles with a diameter smaller than the screen hole 111 pass through the screen hole 111 and are located below the vibrating screen 100, thereby realizing the function of screening particles. The diameter of part of the long strip-shaped particles is smaller than the screen hole 111, and the length of the long strip-shaped particles is slightly greater than the diameter. In order to avoid the long strip-shaped particles from being mixed with the particles below the vibrating screen 100, the blocking plate 200 is fixedly arranged below the screen hole 111 of the vibrating screen 100. The distance between the blocking plate 200 and the screen hole 111 is matched with the diameter of the screen hole 111. After the long strip-shaped particles pass through the screen hole 111, they are intercepted by the blocking plate 200. At this time, the bottom of the long strip-shaped particles is in contact with the blocking plate 200, and the upper part of the long strip-shaped particles is located in the screen hole 111, thereby realizing the function of intercepting the long strip-shaped particles.

[0027] It should be noted that the screen device is mainly used for the gantry pelletizing structure. Compared with the water ring pelletizing structure, the long strip-shaped particles are easy to be generated. After the long strip-shaped particles are screened, they are mixed into the required material, which affects the product quality.

[0028] In the present embodiment, the vibrating screen 100 is provided with a screen hole 111. Through the vibration of the vibrating screen 100 itself, the particles on the vibrating screen 100 move along the vibrating screen 100. In the moving process, the particles with a diameter smaller than the screen hole 111 pass through the screen hole 111.

[0029] As shown in Figure 5As shown, in one embodiment, the vibrating screen 100 includes a screen 110, a vibration source 120, a material frame 130, and an elastic member 140. The screen 110 is inclined and positioned above the material frame 130. The screen 110 is connected to the material frame 130 via the elastic member 140. The vibration source 120 is mounted on the screen 110, and the baffle plate 200 is fixedly mounted on the bottom of the screen 110.

[0030] Among them, the vibration source 120 can be a vibration motor, and the elastic element 140 can be multiple springs distributed on both sides of the screen 110. The vibration motor drives the screen 110 to vibrate, and the granules on the screen 110 move downward along its inclined direction. During the movement, the screen 110 screens the granules.

[0031] In one embodiment, there are multiple sieve holes 111 arranged in a matrix array on the screen 110. There are also multiple baffle plates 200 arranged sequentially along the inclined direction of the screen 110. Each baffle plate 200 is positioned across the screen 110 and directly opposite the sieve holes 111 of the screen 110. The distance between two adjacent baffle plates 200 is greater than the aperture of the sieve holes 111.

[0032] To prevent the granules from running out from both sides of the screen 110, in one embodiment, two side plates 112 are also included, which are fixedly disposed on both sides of the screen 110 along its inclined direction.

[0033] The elongated granules intercepted between the screen opening 111 and the baffle plate 200 will affect the screening capacity of the vibrating screen 100. Therefore, it is necessary to process the elongated granules in the screen opening 111. This embodiment also includes a return assembly 300, which is fixedly installed on the side of the baffle plate 200 away from the vibrating screen 100. The return assembly 300 has a pushing end, which moves in a direction close to or away from the screen opening 111. The movement path of the pushing end passes through the screen opening 111. The elongated granules can be pushed out of the screen opening 111 by the pushing end of the return assembly 300.

[0034] like Figures 2-4 As shown, in one embodiment, the return assembly 300 includes a horizontal plate 310, a top column 320, and a drive member 330. The horizontal plate 310 is disposed on the side of the baffle plate 200 away from the vibrating screen 100. The horizontal plate 310 is slidably connected to the baffle plate 200 along the direction close to or away from the screen hole 111. The top column 320 is fixedly disposed on the side of the horizontal plate 310 close to the baffle plate 200 and forms a pushing end. The drive member 330 is fixedly connected to the horizontal plate 310, and the output end of the drive member 330 is connected to the baffle plate 200 to drive the horizontal plate 310 to slide.

[0035] The number of the horizontal plates 310 can be multiple, and the multiple horizontal plates 310 correspond to the multiple blocking plates 200 one by one. Meanwhile, the driving member 330 can be realized by a telescopic oil cylinder, and the multiple horizontal plates 310 are fixedly connected and share one driving member 330 to realize synchronous action.

[0036] To limit the movement path of the top column 320, in an embodiment, the material returning assembly 300 further comprises a limiting member 340, which comprises a limiting rod 341, a first limiting block 342 and a second limiting block 343. One end of the limiting rod 341 is fixedly connected with the blocking plate 200, the other end of the limiting rod 341 is fixedly connected with the first limiting block 342 through the horizontal plate 310, and the second limiting block 343 is fixedly arranged on the side of the blocking plate 200 close to the horizontal plate 310. When the top column 320 does not pass through the blocking plate 200, the horizontal plate 310 can abut against the first limiting block 342, and when the top column 320 passes through the blocking plate 200 and the sieve hole 111 in sequence, the horizontal plate 310 abuts against the second limiting block 343. Wherein, one limiting member 340 is installed on each side of each horizontal plate 310.

[0037] As shown in Figures 6-7 The device can also specially screen out long strip granules. In the present embodiment, a material control assembly 400 is further included, which comprises a material bin 410 and an inclined plate 420. The material bin 410 is arranged at the feeding end of the vibrating screen 100, the top of the material bin 410 is open, the material bin 410 is provided with a feeding port 411 on the side close to the vibrating screen 100, and the feeding end of the vibrating screen 100 is arranged at the feeding port 411 of the material bin 410. The inclined plate 420 is inclined downward along the direction close to the vibrating screen 100, the inclined plate 420 is arranged in the material bin 410, the inclined plate 420 is in sliding and sealing connection with the material bin 410 in the vertical direction, and the inclined plate 420 can be slid to a position in abutment with the vibrating screen 100.

[0038] In an embodiment, a pushing member 430 is further included, which is installed on the inner bottom wall of the material bin 410, and the output end of the pushing member 430 is connected with the bottom of the inclined plate 420 to drive the inclined plate 420 to slide. Wherein, the pushing member 430 can be realized by a pushing air cylinder.

[0039] In implementation, when the number of the sieve holes 111 blocked by long strip granules gradually increases, the inclined plate 420 moves downward, and the material pile is on the inclined plate 420. After the screening of the granules on the vibrating screen 100 is completed, the above-mentioned material returning assembly 300 is started, and the long strip granules can be individually screened out to the vibrating screen 100 and guided out from the discharge port of the vibrating screen 100. After cleaning is completed, the inclined plate 420 moves upward to the position in abutment with the vibrating screen 100, and the screening work can be continuously carried out.

[0040] Compared with the prior art, the granules to be screened are introduced onto the vibrating screen 100, and the granules with a diameter greater than the screen hole 111 are located above the vibrating screen 100 and the granules with a diameter less than the screen hole 111 are located below the vibrating screen 100 through vibration of the vibrating screen 100, so that the function of screening the granules is realized. The diameter of part of the long-strip granules is less than the screen hole 111, and the length of the long-strip granules is slightly greater than the diameter. In order to avoid the long-strip granules from being mixed with the granules below the vibrating screen 100, the blocking plate 200 is fixed below the screen hole 111 of the vibrating screen 100, the distance from the blocking plate 200 to the screen hole 111 is matched with the diameter of the screen hole 111, and the long-strip granules are intercepted by the blocking plate 200 after passing through the screen hole 111. At this time, the bottom of the long-strip granules is in contact with the blocking plate 200, and the upper part of the long-strip granules is located in the screen hole 111, so that the function of intercepting the long-strip granules is realized.

[0041] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A screening device, characterized in that, The vibration screen and the baffle plate are included. The screen hole is arranged on the vibration screen. The baffle plate is fixedly arranged below the screen hole of the vibration screen, and the distance between the baffle plate and the screen hole is matched with the diameter of the screen hole, so that the long strip-shaped granular material with a diameter smaller than the screen hole and a length greater than the screen hole is clamped between the screen hole and the baffle plate. The vibration screen includes a screen mesh, a vibration source, a material frame and an elastic member, the screen mesh is arranged at an upper position of the material frame in an inclined manner, the screen mesh is connected with the material frame through the elastic member, the vibration source is installed on the screen mesh, and the baffle plate is fixedly arranged at the bottom of the screen mesh. The number of the screen holes is multiple, the multiple screen holes are arranged on the screen mesh in a matrix array, the number of the baffle plates is multiple, the multiple baffle plates are arranged along the inclined direction of the screen mesh in sequence, each baffle plate is arranged across the screen mesh and opposite to the screen hole of the screen mesh, and the interval between two adjacent baffle plates is greater than the aperture of the screen hole. A material control assembly is further included, the material control assembly includes a material bin and an inclined plate, the material bin is arranged at the feeding end of the vibration screen, the top of the material bin is open, the material bin is provided with a feeding port near one side of the vibration screen, the feeding end of the vibration screen is arranged on the feeding port of the material bin, the inclined plate is inclined downward along the direction close to the vibration screen, the inclined plate is arranged in the material bin, the inclined plate is slidably and sealingly connected with the material bin in the vertical direction, and the inclined plate can be slid to a position opposite to the vibration screen.

2. The screening apparatus of claim 1, wherein, Two side plates are further included, and the two side plates are fixedly arranged on both sides of the screen mesh along the inclined direction thereof.

3. The screening apparatus of claim 1, wherein, A material return assembly is further included, the material return assembly is fixedly arranged on one side of the baffle plate away from the vibration screen, the material return assembly has a pushing end, the pushing end moves along the direction close to or away from the screen hole, and the movement path of the pushing end passes through the screen hole.

4. The screening apparatus of claim 3, wherein, The material return assembly includes a horizontal plate, a top column and a driving member, the horizontal plate is arranged on one side of the baffle plate away from the vibration screen, the horizontal plate is slidably connected with the baffle plate along the direction close to or away from the screen hole, the top column is fixedly arranged on one side of the horizontal plate close to the baffle plate, the top column forms the pushing end, and the driving member is fixedly connected with the horizontal plate, and the output end of the driving member is connected with the baffle plate, so as to drive the horizontal plate to slide.

5. The screening apparatus of claim 4, wherein, The material return assembly further includes a limiting member, the limiting member includes a limiting rod, a first limiting block and a second limiting block, one end of the limiting rod is fixedly connected with the baffle plate, the other end of the limiting rod passes through the horizontal plate and is fixedly connected with the first limiting block, and the second limiting block is fixedly arranged on one side of the baffle plate close to the horizontal plate. When the top column does not pass through the baffle plate, the horizontal plate can abut against the first limiting block, and when the top column passes through the baffle plate and the screen hole in sequence, the horizontal plate abuts against the second limiting block.

6. The screening apparatus of claim 5, wherein, The limiting member is arranged on both sides of each horizontal plate.

7. The screening apparatus of claim 1, wherein, A pushing piece is further included, which is installed on the inner bottom wall of the hopper, and an output end of the pushing piece is connected with the bottom of the inclined plate to drive the inclined plate to slide.

Images