A multi-stage mixer for sorting aquaculture feed

Abstract

The present invention discloses a multi-stage mixer for sorting aquaculture feed, which relates to the technical field of mixing. It includes a bracket, the bracket is rotatably connected with a mixing cylinder, a first motor is fixedly connected to one side of the mixing cylinder, a second rotating shaft is rotatably connected inside the mixing cylinder, a first rotating shaft is rotatably connected to the side of the second rotating shaft close to the first motor, a filter screen is fixedly connected in the middle inside the mixing cylinder, and the filter screen is rotatably connected with the first rotating shaft. In the first stage of the present invention, the first motor drives the second rotating shaft to rotate, so that the first stirring frame and the second stirring frame respectively rotate in the same direction for the aquaculture feed at different levels, so as to uniformly mix water with the dry aquaculture feed to adjust the appropriate humidity, improve the palatability of the feed, and by flipping the mixing cylinder, it can be switched to the second stage to separate the caked and uncaked feed after adding water, and at the same time break up the large caked feed particles, so that loose and appropriately humid palatable feed can finally be obtained inside the mixing cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of mixing, and in particular to a multi-stage mixer for sorting breeding feed. Background Art

[0002] Since dry feed is difficult to chew and swallow, adding an appropriate amount of water can make the feed softer and easier to eat, thereby improving the animal's appetite. Wet feed is more easily acted upon by digestive enzymes, which helps to start the digestion process, accelerate the decomposition and absorption of nutrients, and improve feed utilization. Therefore, it is usually necessary to add an appropriate amount of water to the dry feed and stir and mix it to obtain a palatable feed with appropriate humidity.

[0003] The traditional way is to add dry feed and water into a mixer and use a stirring rod to mix them evenly. However, during the mixing process, the feed may clump due to some areas being too dry and other areas being too wet, or the feed may clump due to the inability of water to fully penetrate all the feed. The clumped feed may affect appetite and digestion, which may lead to indigestion or intestinal blockage, further affecting nutrient absorption.

[0004] Traditional mixers cannot solve the above problems, so the present invention provides a multi-stage mixer for sorting breeding feed. Summary of the invention

[0005] In order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a multi-stage mixer for sorting livestock feed.

[0006] A multi-stage mixer for sorting livestock feed, comprising a bracket, which is rotatably connected to a mixing drum, a first motor being fixedly connected to one side of the mixing drum, a second rotating shaft being rotatably connected inside the mixing drum, a side of the second rotating shaft close to the first motor being rotatably connected to the first rotating shaft, a filter screen being fixedly connected in the middle of the mixing drum, the filter screen being rotatably connected to the first rotating shaft, the second rotating shaft being slidably connected to a first stirring frame along an up-and-down direction, the first stirring frame being in contact with the filter screen, end surfaces of the first rotating shaft and the first stirring frame close to each other being fixedly connected to limiting gears, the second rotating shaft being connected to the second stirring frame through a spline groove, a tooth surface being arranged on one side of the second stirring frame, when the second stirring frame is above the first stirring frame, two limiting gears are in contact with each other, a toggle panel is arranged on the side of the second rotating shaft away from the first motor, and a locking component for limiting the first stirring frame to a thin section area of the second rotating shaft and driving the first stirring frame to rotate is arranged on the first stirring frame.

[0007] Furthermore, bevel gears are included. Bevel gears are fixedly connected to the first rotating shaft, the side of the second rotating shaft close to the first motor and the output shaft of the first motor. The bevel gears on the first rotating shaft and the second rotating shaft are meshed with the bevel gear on the first motor.

[0008] Furthermore, a drum cover is provided on a side of the mixing drum away from the first motor.

[0009] Furthermore, the second rotating shaft is provided with a thick section and a thin section, the shifting panel is located in the thin section area of the second rotating shaft, and the upper and lower sides of the shifting panel are both located in the thick section area of the second rotating shaft.

[0010] Furthermore, the locking assembly includes a block symmetrically distributed along the first stirring frame, the block is slidingly connected to the first stirring frame, the block rotates to contact the toggle panel, the block is fixed with a spring, the first stirring frame is fixed with a fixed plate symmetrically distributed along the first stirring frame, and the fixed plate is fixed with an adjacent spring.

[0011] Furthermore, it also includes a second motor, which is fixedly connected to the bracket, and the output shaft of the second motor is fixedly connected to a worm, and the end of the rotating shaft of the mixing drum close to the worm is fixedly connected to a worm wheel, and the worm wheel and the worm are meshed with each other.

[0012] Furthermore, it also includes a rotating tube, which is fixedly connected to the first rotating shaft, and the rotating tube is slidably connected to a spray head symmetrically distributed along the rotating tube, and the side of the mixing drum close to the rotating tube is fixedly connected to a water storage barrel, and the side of the mixing drum close to the water storage barrel is fixedly connected to a fixed tube, one side of the fixed tube is connected to the water storage barrel, and the other side of the fixed tube is connected to the rotating tube.

[0013] Furthermore, the side of the spray head is provided with circumferentially distributed spray holes, and when the second stirring rack is above the first stirring rack, the spray holes of the spray head are retracted into the rotating tube due to the effect of gravity.

[0014] Furthermore, it also includes stirring blades symmetrically distributed along the rotating tube, and the stirring blades are fixedly connected to the rotating tube.

[0015] Furthermore, it also includes a rotating ring, which is fixed to one end of the second rotating shaft close to the bevel gear, and a vibration frame is slidably connected to the side of the mixing drum close to the rotating ring. The vibration frame is slidably connected to the rotating ring, and an extrusion surface is provided on the side of the rotating ring close to the vibration frame. When the rotating ring is located above the vibration frame, the extrusion surface of the rotating ring does not contact the vibration frame.

[0016] The beneficial effect is that in the first stage of the present invention, the second rotating shaft is driven to rotate by the first motor, so that the first stirring frame and the second stirring frame respectively rotate the upper and lower layers of the breeding feed in the same direction, so that the dry breeding feed can be evenly mixed with water to adjust the palatable humidity and improve the palatability of the feed, and the second stage can be switched to by flipping the mixing drum to separate the agglomerated and non-agglomerated feed after adding water, and at the same time, the agglomerated large particles of feed are broken up, so that loose and palatable feed with suitable humidity can be finally obtained in the mixing drum.

[0017] In the first stage of the present invention, the rotation tube is driven to rotate synchronously by the first rotating shaft, so that the water in the water storage bucket flows into the rotation tube through the fixed tube and is then sprayed out through the rotating spray head, thereby automatically spraying the water evenly onto the dry breeding feed, which is beneficial to the stirring and mixing of the breeding feed and water.

[0018] In the second stage of the present invention, the spray head slides inwards relative to the rotation tube, so that each spray hole of the spray head is blocked by the rotation tube. In this way, the spray head stops spraying water in the second stage, avoiding excessive addition of moisture to the feed. At the same time, the unclumped feed in the stirring cylinder is stirred again by the stirring piece, further improving the uniformity of feed mixing.

[0019] In the second stage of the present invention, by using the gravitational force, the vibration frame slides downwards until it contacts the rotating ring. Through the intermittent contact and separation of the extrusion surface of the rotating ring with the vibration frame, the vibration frame vibrates up and down, so that the unclumped feed becomes looser and more palatable. Description of the Drawings

[0020] Figure 1 It is a three-dimensional structure schematic diagram of the present invention.

[0021] Figure 2 It is a partial structure sectional view of the present invention.

[0022] Figure 3 It is a three-dimensional structure schematic diagram of the present invention in the flipped working state.

[0023] Figure 4 It is a three-dimensional structure schematic diagram of components such as the first motor, the first rotating shaft, and the second rotating shaft of the present invention.

[0024] Figure 5 It is a three-dimensional structure schematic diagram of components such as the first stirring frame and the second stirring frame of the present invention.

[0025] Figure 6 It is a three-dimensional structure schematic diagram of components such as the clamping block, the spring, and the fixing plate of the present invention.

[0026] Figure 7 It is a three-dimensional structure schematic diagram of components such as the second motor, the worm, and the worm gear of the present invention.

[0027] Figure 8 It is a three-dimensional structure schematic diagram of components such as the rotation tube, the spray head, and the water storage bucket of the present invention.

[0028] Figure 9 It is a three-dimensional structure schematic diagram of components such as the water storage bucket, the fixed tube, and the stirring piece of the present invention.

[0029] Figure 10 It is a three-dimensional structure schematic diagram of components such as the stirring cylinder, the rotating ring, and the vibration frame of the present invention.

[0030] Explanation of the reference numerals: 101_bracket, 102_mixing drum, 103_first motor, 104_first rotating shaft, 105_second rotating shaft, 106_filter, 107_first stirring frame, 108_limiting gear, 109_second stirring frame, 110_spline groove, 111_sliding panel, 112_bevel gear, 201_block, 202_spring, 203_fixing plate, 301_second motor, 302_worm, 303_worm wheel, 401_rotating tube, 402_spray head, 403_water storage barrel, 404_fixing tube, 405_mixing blade, 501_rotating ring, 502_vibration frame. DETAILED DESCRIPTION

[0031] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

[0032] Embodiment 1: A multi-stage mixer for sorting livestock feed, such as Figures 1 - 5 As shown, it includes a bracket 101, the upper part of the bracket 101 is rotatably connected to a mixing drum 102, one side of the mixing drum 102 is fixedly connected to a first motor 103, a drum cover is provided on the side of the mixing drum 102 away from the first motor 103, a second rotating shaft 105 is rotatably connected in the mixing drum 102, the second rotating shaft 105 is provided with a thick section and a thin section, the second rotating shaft 105 is rotatably connected to the first rotating shaft 104 on the side close to the first motor 103, a filter screen 106 is fixedly connected in the middle of the mixing drum 102, the filter screen 106 is rotatably connected to the first rotating shaft 104, and a first stirring frame 107 is slidably connected to the side of the second rotating shaft 105 away from the first motor 103 along the up and down directions. When the first stirring frame 107 is located above the filter screen 106, the first stirring frame 107 slides down to contact with the filter screen 106, and the first stirring frame 107 is connected to the first stirring frame 107. The end faces of a rotating shaft 104 and a first stirring frame 107 that are close to each other are fixedly connected with a limit gear 108. The second rotating shaft 105 is connected to a second stirring frame 109 through a spline groove 110. The side of the second stirring frame 109 close to the first stirring frame 107 is set as a tooth surface. When the second stirring frame 109 is above the first stirring frame 107, the two limit gears 108 contact each other. At this time, driven by the two limit gears 108, the first stirring frame 107 rotates synchronously with the first rotating shaft 104. A toggle panel 111 is set on the side of the second rotating shaft 105 away from the first motor 103. The toggle panel 111 is located in the thin section area of the second rotating shaft 105. The upper and lower sides of the toggle panel 111 are both the thick section areas of the second rotating shaft 105. A locking component is set in the first stirring frame 107.

[0033] like Figure 4As shown, bevel gears 112 are fixedly connected to the first rotating shaft 104 and the second rotating shaft 105 on one side close to the first motor 103 and the output shaft of the first motor 103, and the bevel gears 112 on the first rotating shaft 104 and the second rotating shaft 105 are meshed with the bevel gear 112 on the first motor 103, so that the first rotating shaft 104 and the second rotating shaft 105 rotate in opposite directions.

[0034] like Figures 1 - 5 As shown, the locking assembly includes a block 201 symmetrically distributed along the front and back of the first stirring frame 107, the block 201 is slidably connected to the first stirring frame 107, the block 201 rotates and contacts the toggle panel 111, the second rotating shaft 105 drives the block 201 to rotate through the toggle panel 111, thereby driving the first stirring frame 107 to rotate synchronously, a spring 202 is fixedly connected to one side of the block 201, and a fixing plate 203 symmetrically distributed along the front and back of the first stirring frame 107 is fixedly connected to the first stirring frame 107, and the fixing plate 203 is fixedly connected to the adjacent spring 202.

[0035] like Figure 2 , Figure 3 and Figure 6 As shown, it also includes a second motor 301, the second motor 301 is fixedly connected to the bracket 101, the output shaft of the second motor 301 is fixedly connected to the worm 302, the left end of the rotating shaft of the mixing drum 102 is fixedly connected to the worm wheel 303, the worm wheel 303 and the worm 302 are meshed with each other, and are used to drive the mixing drum 102 to flip up and down 180 degrees, and the meshing of the worm wheel 303 and the worm 302 has a locking effect on the mixing drum 102.

[0036] like Figure 3 , Figure 8 and Figure 9 As shown, it also includes a rotating tube 401, which is fixedly connected to the first rotating shaft 104. The rotating tube 401 is slidably connected to the spray head 402 which is symmetrically distributed along the rotating tube 401 in the up and down directions. The side of the spray head 402 is provided with circumferentially distributed spray holes. When the second stirring frame 109 is above the first stirring frame 107, the spray holes of the spray head 402 are retracted into the rotating tube 401 due to gravity, so that the spray head 402 cannot discharge water. A water storage barrel 403 is fixedly connected to the side of the mixing drum 102 close to the rotating tube 401, and a fixed tube 404 is fixedly connected to the side of the mixing drum 102 close to the water storage barrel 403. One side of the fixed tube 404 is connected to the water storage barrel 403, and the other side of the fixed tube 404 is connected to the rotating tube 401. The rotating tube 401 is fixedly connected with stirring blades 405 which are symmetrically distributed along the rotating tube 401.

[0037] When using this mixer to add water to dry aquaculture feed for mixing to adjust the appropriate humidity, first, open the lid of the mixing drum 102, and put the dry aquaculture feed to be mixed into the lower part of the mixing drum 102. Then, start the first motor 103. The output shaft of the first motor 103 drives the bevel gears 112 on the first rotating shaft 104 and the second rotating shaft 105 to rotate through the bevel gear 112 on it, so that the first rotating shaft 104 and the second rotating shaft 105 rotate in opposite directions. During the rotation of the second rotating shaft 105, the clamping block 201 is driven to rotate through the dialing panel 111, thereby driving the first stirring frame 107 to rotate. At the same time, the second rotating shaft 105 drives the second stirring frame 109 to rotate. The first stirring frame 107 and the second stirring frame 109 rotate the aquaculture feed at the upper and lower levels in the same direction. During this process, the rotating pipe 401 rotates synchronously with the first rotating shaft 104, thereby driving the spray head 402 to rotate. Water is added to the water storage bucket 403. The water flows into the rotating pipe 401 through the fixed pipe 404 and is then sprayed out through the rotating spray head 402. In this way, the water evenly flows out onto the feed in the mixing drum 102, so that the dry aquaculture feed is wetted, and the dry aquaculture feed and water are evenly stirred and mixed, improving the palatability of the feed. The above is the first stage of the mixer operation, and the first rotating shaft 104 does not function.

[0038] After the first stage of water mixing and stirring operation is completed, the second motor 301 is controlled to drive the worm 302 to rotate, thereby driving the worm wheel 303 to rotate, and then driving the mixing drum 102 to flip up and down 180 degrees, so that the first motor 103 is located below the mixing drum 102. At this time, the feed that has agglomerated after adding water cannot pass through the filter screen 106 and remains on the side of the mixing drum 102 away from the first motor 103, while the feed that has not agglomerated after adding water passes through the filter screen 106 downwards and falls into the mixing drum 10 2, the first stirring frame 107 and the second stirring frame 109 also slide downward along the second rotating shaft 105. During the downward sliding process, the first stirring frame 107 drives the block 201 to slide down from the thin section of the second rotating shaft 105 to the thick section of the second rotating shaft 105. Under the squeezing effect of the thick section of the second rotating shaft 105, the block 201 slides to the side of the compression spring 202, so that the second rotating shaft 105 can no longer drive the block 201 to rotate by the toggle panel 111. Finally, the first stirring frame 107 drives the limiting gear 108 thereon to slide downward until it contacts the limiting gear 108 on the first rotating shaft 104. At this time, affected by the spline groove 110, the second stirring frame 109 still rotates synchronously with the second rotating shaft 105, while the first stirring frame 107 is driven by the two limiting gears 108 to rotate synchronously with the first rotating shaft 104. Since the first rotating shaft 104 and the second rotating shaft 105 have opposite directions, the directions of the first stirring frame 107 and the second stirring frame 109 are also opposite. The first stirring frame 107 pushes the large particles of agglomerated feed on the filter screen 106 to the bottom tooth surface of the second stirring frame 109. The second stirring frame 109 rotates in the opposite direction relative to the first stirring frame 107 to break up the agglomerated feed. Finally, all the agglomerated feed on the side of the mixing drum 102 away from the first motor 103 is broken up and falls downward through the filter screen 106 to the side of the mixing drum 102 close to the first motor 103. The above is the second stage of the operation of the mixer.

[0039] In the second stage of the mixer operation, the rotating tube 401, the spray head 402, the water storage barrel 403, the fixed tube 404 and the stirring blade 405 are also turned upside down by 180 degrees as a whole. At this time, the spray head 402 slides inward relative to the rotating tube 401, so that the spray holes of the spray head 402 are automatically retracted into the rotating tube 401, so that the spray holes of the spray head 402 are blocked by the rotating tube 401. In this way, the spray head 402 stops spraying water in the second stage to avoid excessive addition of water to the feed. In addition, the stirring blade 405 can also stir the un-lumped feed in the mixing drum 102 again in the second stage to further improve the uniformity of the feed mixing.

[0040] After completing the second stage of the stirring and dispersing operation, the second motor 301 is controlled to drive the worm 302 to rotate in the opposite direction, so that the mixing drum 102 is flipped and reset, and all the feed passes through the filter 106 and falls to the side of the mixing drum 102 close to the drum cover. The first stirring frame 107 and the second stirring frame 109 also slide downward along the second rotating shaft 105. During the downward sliding process, the first stirring frame 107 drives the block 201 to slide down from the thick section of the second rotating shaft 105 to the thin section of the second rotating shaft 105. Under the reset action of the spring 202, the block 201 slides in the opposite direction and resets, so that the second rotating shaft 105 can drive the block 201 to rotate by turning the panel 111. At the same time, the first stirring frame 107 drives the limit gear 108 thereon to slide downward until it is disengaged from the limit gear 108 on the first rotating shaft 104. Finally, the first motor 103 is turned off, the drum cover is opened, and the mixed feed can be taken out.

[0041] Embodiment 2: Based on embodiment 1, Figure 3 and Figure 10 As shown, a rotating ring 501 is also included. The rotating ring 501 is fixedly connected to one end of the second rotating shaft 105 close to the bevel gear 112. A vibration frame 502 is slidably connected to the side of the mixing drum 102 close to the rotating ring 501 along the up and down directions. The vibration frame 502 is slidably connected to the rotating ring 501. An extrusion surface is provided on the side of the rotating ring 501 close to the vibration frame 502. When the rotating ring 501 is located above the vibration frame 502, the extrusion surface of the rotating ring 501 does not contact the vibration frame 502. When the rotating ring 501 is located below the vibration frame 502, the extrusion surface of the rotating ring 501 contacts the vibration frame 502.

[0042] In the first stage of the operation of the mixer, the rotating ring 501 is located above the vibration frame 502. The vibration frame 502 slides downward relative to the second rotating shaft 105 under the action of gravity until it is not in contact with the rotating ring 501. In the second stage of the operation of the mixer, the vibration frame 502 slides downward relative to the second rotating shaft 105 under the action of gravity until it is in contact with the rotating ring 501. At this time, the rotating ring 501 is located below the vibration frame 502. In this way, when the second rotating shaft 105 drives the rotating ring 501 to rotate until the extrusion surface contacts the vibration frame 502, the rotating ring 501 squeezes the vibration frame 502 through the extrusion surface to slide upward. When the second rotating shaft 105 drives the rotating ring 501 to rotate until the extrusion surface is separated from the vibration frame 502, the vibration frame 502 slides downward under the action of gravity. In this way, the vibration frame 502 vibrates up and down in the second stage, making the unlumped feed looser and more palatable.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage mixer for sorting aquaculture feed, comprising a support (101), the support (101) is rotatably connected to a mixing cylinder (102), a first motor (103) is fixedly connected to one side of the mixing cylinder (102), a second rotating shaft (105) is rotatably connected inside the mixing cylinder (102), and a first rotating shaft (104) is rotatably connected to the side of the second rotating shaft (105) close to the first motor (103), characterized in that, A filter screen (106) is fixedly connected in the middle of the mixing drum (102), and the filter screen (106) is rotatably connected to the first rotating shaft (104). The second rotating shaft (105) is slidably connected to the first stirring frame (107) in the up-down direction. The first stirring frame (107) is in contact with the filter screen (106). The end surfaces of the first rotating shaft (104) and the first stirring frame (107) that are close to each other are fixedly connected to the limit gear (108). The second rotating shaft (105) is connected to the second stirring frame (109) via a spline groove (110). One side of the second stirring frame (109) is provided with a tooth surface, and when the second stirring frame (109) is above the first stirring frame (107), the two limit gears (108) contact each other, and a toggle panel (111) is provided on the side of the second rotating shaft (105) away from the first motor (103), and the second rotating shaft (105) is provided with a thick section and a thin section, and the toggle panel (111) is located in the thin section area of the second rotating shaft (105), and the upper and lower sides of the toggle panel (111) are both the thick section areas of the second rotating shaft (105); The first stirring frame (107) is provided with a locking component for restricting the first stirring frame (107) to a thin section area of the second rotating shaft (105) and driving the first stirring frame (107) to rotate; The locking assembly comprises a clamping block (201) symmetrically distributed along the first stirring frame (107); the clamping block (201) is slidably connected to the first stirring frame (107); the clamping block (201) rotates to contact the toggle panel (111); the clamping block (201) is fixedly connected to a spring (202); the first stirring frame (107) is fixedly connected to a fixing plate (203) symmetrically distributed along the first stirring frame (107); and the fixing plate (203) is fixedly connected to an adjacent spring (202).

2. A feed sorting multi-stage mixer according to claim 1, further comprising a bevel gear (112), the first rotating shaft (104) and the second rotating shaft (105) being fixedly connected to the side of the first motor (103) and the output shaft of the first motor (103) with the bevel gear (112), and the bevel gears (112) on the first rotating shaft (104) and the second rotating shaft (105) are meshed with the bevel gear (112) on the first motor (103).

3. The multi-stage mixer for sorting aquaculture feed according to claim 2, wherein, A drum cover is provided on a side of the mixing drum (102) away from the first motor (103).

4. The multi-stage mixer for sorting aquaculture feed according to claim 3, wherein, The mixing drum (102) further comprises a second motor (301), the second motor (301) being fixedly connected to the bracket (101), the output shaft of the second motor (301) being fixedly connected to a worm (302), and the end of the rotating shaft of the mixing drum (102) close to the worm (302) being fixedly connected to a worm wheel (303), the worm wheel (303) and the worm (302) being meshed with each other.

5. A multi-stage mixer for sorting aquaculture feed according to claim 4, characterized in that, It further includes a rotating pipe (401), the rotating pipe (401) is fixedly connected to the first rotating shaft (104), the rotating pipe (401) is slidably connected with spray heads (402) symmetrically distributed along the rotating pipe (401), a water storage bucket (403) is fixedly connected to one side of the stirring cylinder (102) close to the rotating pipe (401), a fixed pipe (404) is fixedly connected to one side of the stirring cylinder (102) close to the water storage bucket (403), one side of the fixed pipe (404) is communicated with the water storage bucket (403), and the other side of the fixed pipe (404) is communicated with the rotating pipe (401).

6. The multi-stage mixer for sorting aquaculture feed according to claim 5, characterized in that, Circumferentially distributed spray holes are formed on the side of the spray head (402). When the second stirring frame (109) is above the first stirring frame (107), each spray hole of the spray head (402) retracts into the rotating pipe (401) under the action of gravity.

7. A multi-stage mixer for sorting aquaculture feed according to claim 6, characterized in that, It further includes stirring vanes (405) symmetrically distributed along the rotating pipe (401), and the stirring vanes (405) are fixedly connected to the rotating pipe (401).

8. A multi-stage mixer for sorting aquaculture feed according to claim 7, characterized in that, It further includes a rotating ring (501), the rotating ring (501) is fixedly connected to one end of the second rotating shaft (105) close to the bevel gear (112), a vibrating frame (502) is slidably connected to one side of the stirring cylinder (102) close to the rotating ring (501), the vibrating frame (502) is slidably connected to the rotating ring (501), an extrusion surface is arranged on one side of the rotating ring (501) close to the vibrating frame (502), and when the rotating ring (501) is above the vibrating frame (502), the extrusion surface of the rotating ring (501) is not in contact with the vibrating frame (502).

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