Centrifugal disc type hulling device of huller

Abstract

The utility model provides a centrifugal disc type hulling device of a huller, and relates to the technical field of rice hulling equipment. The centrifugal machine comprises a feeding port, a discharging port, a machine body shell and a centrifugal disc. Comprising a crushing section and a shelling section, a feeding port is sequentially communicated with the crushing section, the shelling section and a discharging port in a machine body shell, the crushing section is provided with a crushing roller, a delivery groove is spirally formed in the length direction of a crushing roller shaft, and the shelling section is provided with a centrifugal disc coaxially connected with the crushing roller through a transmission shaft; a buffering cushion wrapping the centrifugal disc is arranged on the inner wall of the machine body shell at the shelling section, a discharging port penetrating through the machine body shell and the buffering cushion is formed in the machine body shell at the shelling section, and a retaining wall is arranged outside the discharging port. The unhulled rice is thrown out under the rotation of the centrifugal disc of the hulling section and impacts the inner wall of the machine body shell of the hulling section, grains are prevented from being broken through the buffering effect of the buffering pad, broken stones are crushed before entering the centrifugal disc, and abrasion of centrifugal hulling to the buffering pad is greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of rice hulling equipment, and more specifically, to a centrifugal disc hulling device for a huller. Background Art

[0002] A centrifugal rice huller (huller) is a mechanical device used to hull rice. It uses centrifugal force to separate the rice from the husk. In this huller, rice enters the machine through a feed mechanism and is accelerated by a rapidly rotating thrower disc. Centrifugal force throws the rice toward a fixed impact ring, where the husk is removed, effectively removing the rice. This hulling method offers advantages such as a simple structure, easy operation, low power consumption, and low processing costs. The design of this machine allows for high rice processing efficiency, making it suitable for large-scale rice processing, particularly when large quantities of rice need to be processed quickly. Several typical centrifugal hullers exist in the prior art:

[0003] 1. Chinese utility model patent publication number CN205236029U discloses a green wheat kernel centrifugal shelling machine, including a feeding mechanism and a shelling mechanism. The feeding mechanism includes a base, on which an inclined feeding barrel is fixedly provided. The bottom end of the feeding barrel is provided with a feeding port, and the top end is provided with a discharge port connected to the shelling mechanism. A pushing auger is provided in the feeding barrel, and the pushing auger is connected to a first motor through a belt; the shelling mechanism includes a shelling barrel, and a second motor is provided on the top of the shelling barrel, and the second motor is connected to a transmission shaft coaxially arranged in the shelling barrel. The transmission shaft is provided with several coaxial turntables, and the turntables cooperate with the barrel body of the shelling barrel.

[0004] 2. Chinese utility model patent publication number CN220759331U discloses a high-speed centrifugal oat shelling separator, comprising a housing, a shelling impeller and a shelling ring disposed within the housing. The shelling ring is disposed around the shelling impeller, an inlet is disposed on the upper side of the shelling impeller, a centrifugal chamber is disposed within the housing, and a discharge port facing the shelling ring is disposed on the side of the impeller. The separator also includes a drive mechanism connected to the impeller. The high-speed centrifugal oat shelling separator is a novel type of oat shelling equipment. Compared with existing shelling equipment, the high-speed centrifugal oat shelling separator has high shelling efficiency and low kernel crushing rate. The feed pipe on the housing can be adjusted in height. The feed pipe can be lowered or raised to adjust the feed speed, thereby facilitating output control and adjusting the feed pipe for uniform feeding.

[0005] However, there is a common problem with existing centrifugal shellers. The impact ring that the rice collides with needs to be equipped with a buffer pad to reduce the probability of rice breakage. However, the buffer pad wears out very quickly and needs to be replaced frequently to prevent the buffer pad debris from mixing into the hulled rice, which increases the cost of rice shelling production. Especially for large centrifugal shellers, the cost of replacing the buffer pad is high. Utility Model Content

[0006] In order to solve the problems existing in the existing centrifugal shelling machine, the technical solution adopted in this application is a shelling machine centrifugal disc shelling device, including a feed inlet, a discharge port, a body shell and a centrifugal disc;

[0007] It includes a crushing section and a shelling section, the feed port is connected with the crushing section, shelling section and discharge port in sequence inside the body shell, the crushing section is provided with a crushing roller, and a delivery groove is spirally provided along the length direction of the crushing roller shaft, the shelling section is provided with a centrifugal disk coaxially connected to the crushing roller through a transmission shaft, the transmission shaft passes through the body shell at one end of the crushing section, the inner wall of the body shell at the shelling section position is provided with a buffer pad wrapping the centrifugal disk, the body shell at the shelling section position is provided with a discharge port passing through the body shell and the buffer pad, and a retaining wall is provided outside the discharge port.

[0008] Optionally, the centrifugal disk includes centrifugal blades, which are evenly distributed circumferentially with the central axis of the centrifugal disk as the rotation axis. The centrifugal blades are arc-shaped, and the convex direction of the arc faces the rotation direction of the centrifugal disk.

[0009] Optionally, a return material structure is provided along the circumference of the inner wall of the buffer pad, and the return material structure is corrugated.

[0010] Optionally, multiple delivery grooves are evenly arranged along the circumference of the crushing roller, the outer wall of the crushing roller is a variable diameter arc, the diameter of the variable diameter arc gradually increases from the rotation direction of the crushing roller, and the shapes of the outer walls of each section of the crushing roller are consistent.

[0011] Optionally, a slag discharge port is provided between the crushing section and the shelling section.

[0012] Optionally, the discharge port is arranged at the body shell directly below the shelling section, the centrifugal disc is eccentrically arranged with respect to the body shell at the shelling section, and the centrifugal disc is arranged axially above the body shell at the shelling section.

[0013] Optionally, a blocking section is provided outside the discharge port, the blocking section includes a collision channel connected to the discharge port, and at least three retaining walls in different directions are provided in the collision channel.

[0014] Optionally, the retaining wall includes a first retaining wall, which is inclined, and the angle between the inclination direction of the first retaining wall and the tangent of the rotation direction of the centrifugal disk extending within the opening range of the discharge port is 45°-90°, and the center position of the first retaining wall is consistent with the center position of the discharge port opening in the vertical direction.

[0015] The beneficial effect of the present invention is that the rice to be hulled enters the hulling device through the feed port and first passes through the crushing section. The gravel in the rice is crushed under the extrusion of the crushing roller and the outer shell of the crushing section, and then mixed with the rice and enters the hulling section. The rice is thrown out by the rotation of the centrifugal disk of the hulling section and hits the inner wall of the outer shell of the hulling section. The hull and the grain of rice are separated and the grain is prevented from being broken by the buffering effect of the buffer pad. The gravel is crushed before entering the centrifugal disk, which greatly reduces the wear of the buffer pad during the centrifugal hulling process. Most of the rice undergoes the hulling process before being thrown out of the discharge port, and a small amount is directly thrown out of the discharge port and hits the retaining wall outside the discharge port for hulling. Since the distance between the retaining wall and the centrifugal disk is greater than the distance between the inner wall of the outer shell of the hulling section and the centrifugal disk, the impact force of the rice hitting this place is weak. In order to ensure the one-time hulling effect, no buffer pad is set at the retaining wall, and the broken rice rate will not be significantly increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art:

[0017] Figure 1 This is a three-dimensional schematic diagram of a centrifugal disc shelling device of a shelling machine according to an embodiment of the present application;

[0018] Figure 2 This is a side view schematic diagram of a centrifugal disc shelling device of a shelling machine according to an embodiment of the present application;

[0019] Figure 3 for Figure 2 AA section view;

[0020] Figure 4 This is a front view schematic diagram of a centrifugal disc shelling device of a shelling machine according to an embodiment of the present application;

[0021] Figure 5 for Figure 4 BB cross-sectional view;

[0022] Figure 6 This is a front view of a centrifugal disc shelling device with a recycling structure according to an embodiment of the present application (the recycling structure is not shown inside);

[0023] Figure 7 for Figure 6 AA cross-sectional view;

[0024] Figure 8A schematic diagram of the eccentric setting of the centrifugal disc;

[0025] Figure 9 This is a three-dimensional schematic diagram of the crushing roller in the embodiment of the present application (the transmission structure has been hidden);

[0026] Figure 10 This is a schematic side view of the crushing roller in an embodiment of the present application (the transmission structure has been hidden).

[0027] Explanation of the reference numerals: 1-feeding port; 2-body shell; 3-discharging port; 4-crushing section; 5-shelling section; 6-blocking section; 7-crushing roller; 8-delivery trough; 9-drive shaft; 10-centrifugal disc; 11-buffer pad; 12-retaining wall; 13-centrifugal blade; 14-return material structure; 15-outer wall of crushing roller; 16-slag discharge port; 17-collision channel; 18-first retaining wall. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0030] Now, a centrifugal disc shelling device for shelling machine provided in the embodiment of the present application is described. Figure 1-Figure 5 as well as Figure 9 and Figure 10 As shown, a centrifugal disc shelling device of a shelling machine includes an inlet 1, an outlet 3, a body shell 2 and a centrifugal disc 10;

[0031] It includes a crushing section 4 and a shelling section 5. The feed port 1 is connected with the crushing section 4, the shelling section 5 and the discharge port 3 in sequence inside the body shell 2. The crushing section 4 is provided with a crushing roller 7. A delivery groove 8 is spirally arranged along the axial length direction of the crushing roller 7. The shelling section 5 is provided with a centrifugal disk 10 coaxially connected to the crushing roller 7 through a transmission shaft 9. The transmission shaft 9 passes through the body shell 2 at one end of the crushing section 4. The inner wall of the body shell 2 at the position of the shelling section 5 is provided with a buffer pad 11 wrapping the centrifugal disk 10. The body shell 2 at the position of the shelling section 5 is provided with a discharge port 3 that passes through the body shell 2 and the buffer pad 11, and a retaining wall 12 is provided outside the discharge port 3.

[0032] The rice to be hulled enters the hulling device through the feed port 1, and first passes through the crushing section 4. The gravel in the rice is crushed under the extrusion of the crushing roller 7 and the outer shell 2 of the crushing section 4, and then mixed with the rice into the hulling section 5. The rice is thrown out by the rotation of the centrifugal disk 10 of the hulling section 5 and hits the inner wall of the outer shell 2 of the hulling section 5. The hull of the rice is separated from the grain. The buffering effect of the buffer pad 11 prevents the grain from breaking, and the gravel is crushed before entering the centrifugal disk 10, which greatly reduces the The centrifugal hulling process causes wear on the buffer pad 11. Most of the rice undergoes the hulling process before being thrown out of the discharge port 3. A small amount is directly thrown out of the discharge port 3 and hits the retaining wall 12 outside the discharge port 3 for hulling. Since the distance between the retaining wall 12 and the centrifugal disk 10 is greater than the distance between the inner wall of the body shell 2 of the hulling section 5 and the centrifugal disk 10, the impact force of the rice hitting this place is weak. In order to ensure the one-time hulling effect, the buffer pad 11 is not set at the retaining wall 12, and the broken rice rate will not be significantly increased.

[0033] In another embodiment of the present application, the centrifugal disk 10 includes centrifugal blades 13, which are evenly distributed circumferentially about the central axis of the centrifugal disk 10. The centrifugal blades 13 are arc-shaped, with the convex direction of the arc facing the rotation direction of the centrifugal disk 10. When the rice grains collide with the cushion 11 under the influence of the arc-shaped trajectory of the centrifugal blades 13, the angle between the movement direction of the rice grains and the cushion 11 is smaller than the angle between the movement direction of the rice grains and the cushion 11 under the influence of linear centrifugal blades 13. This reduces the impact force of the rice grains colliding with the cushion 11 and reduces the rice breakage rate.

[0034] In another embodiment of the present application, Figure 6-Figure 7 As shown, a corrugated return structure 14 is provided along the circumference of the inner wall of the buffer pad 11. Rice grains are ejected from the centrifugal disc 10 toward the housing 2 of the hulling section 5, where they collide with the return structure 14. Some of the rice grains are then redirected toward the centrifugal disc 10, drawn into it, and ejected again.

[0035] When the return material structure 14 plays the role of changing the movement direction of the rice, it can not only return part of the rice to the centrifugal disk 10, but also increase the probability of the rice moving inside the hulling section 5 colliding with each other, so that the rice collides with each other to assist in hulling, thereby improving the rice hulling efficiency. The return material structure 14 replaces the buffer pad 11 in the circumferential collision area with the rice, and the material is the same as that of the buffer pad 11, which is polytetrafluoroethylene in this embodiment.

[0036] In another embodiment of the present application, Figure 4 and Figure 5As shown, multiple delivery grooves 8 are evenly arranged along the circumference of the crushing roller 7. The outer wall of the crushing roller 7 is a variable diameter arc, the diameter of which gradually increases in the direction of rotation of the crushing roller 7. The outer wall of each section of the crushing roller 7 has a consistent shape. In this embodiment, the delivery groove 8 is provided with three sections, and the variable diameter arc outer wall is also provided with three sections. The maximum distance between the variable diameter arc outer wall of the crushing roller 7 and the body shell 2 of the crushing section 4 is less than the minimum size of rice grains. Gravel enters between the crushing roller 7 and the body shell 2 of the crushing section 4. The variable diameter arc outer wall of the crushing roller outer wall 15 improves the effect and efficiency of stone crushing. Due to the provision of the variable diameter arc outer wall, the maximum distance between the variable diameter arc outer wall of the crushing roller 7 and the body shell 2 of the crushing section 4 can be set higher than that of a design with a constant diameter arc outer wall, which promotes the entry of more sized gravel between the crushing roller 7 and the body shell 2 of the crushing section 4, thereby improving the stone crushing effect and the range of stone sizes that can be crushed.

[0037] In another embodiment of the present application, Figure 2 and Figure 3 As shown, a slag discharge port 16 is provided between the crushing section 4 and the shelling section 5. The crushed gravel and small-particle gravel are discharged before entering the shelling section 5. In this embodiment, the slag discharge port 16 is provided below the position between the crushing section 4 and the shelling section 5 of the machine body housing 2. The opening arc is 120° and the opening width is smaller than the transverse width of the rice. The crushed stones are discharged through the slag discharge port 16 between the crushing section 4 and the shelling section 5, which can further reduce the wear of the gravel on the buffer pad 11 of the shelling section 5 and make the shelled grains cleaner.

[0038] In another embodiment of the present application, Figure 7 and Figure 8 As shown, the discharge port 3 is located on the housing 2 directly below the shelling section 5. The centrifugal disc 10 is eccentrically positioned relative to the housing 2 at the shelling section 5, and is positioned axially slightly above the housing 2 at the shelling section 5. The eccentric placement of the centrifugal disc 10 increases the distance between the centrifugal disc 10 and the discharge port 3, thereby reducing the angular range of the tangent of the centrifugal disc 10's rotational direction toward the discharge port 3. This reduces the probability of rice grains leaving the centrifugal disc 10 directly exiting the discharge port 3, allowing more rice grains to collide with the buffer pad 11 at least once before exiting the discharge port 3.

[0039] In another embodiment of the present application, Figure 6 and Figure 7 As shown, a blocking section 6 is disposed outside the discharge port 3. The blocking section 6 includes a collision channel 17 connected to the discharge port 3. At least three retaining walls 12 are disposed in the collision channel 17 in different directions. Increasing the number of retaining walls 12 in the blocking section 6 promotes more collisions between rice grains leaving the discharge port 3, thus enabling complete hulling of some rice grains whose hulls have cracked.

[0040] In another embodiment of the present application, Figure 6 and Figure 7 As shown, the retaining wall 12 includes a first retaining wall 18, which is arranged at an angle. The angle between the inclination direction of the first retaining wall 18 and the tangent of the rotation direction of the centrifugal disk 10 extending within the opening range of the discharge port 3 is 45°-90°, and the center position of the first retaining wall 18 is consistent with the center position of the opening of the discharge port 3 in the vertical direction.

[0041] To ensure that rice grains that exit the discharge port 3 directly without colliding with the cushion 11 can be effectively hulled by the first retaining wall 18, the angle between the trajectory of the rice grains leaving the discharge port and the first retaining wall 18 is increased to ensure a collision effect. In the width direction, the first retaining wall 18 completely covers the movement direction of the rice grains that exit the centrifugal disc directly, ensuring that the rice grains that exit the discharge port 3 directly without colliding with the cushion 11 will inevitably collide with the first retaining wall 18.

[0042] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A centrifugal disc shelling device for a shelling machine, comprising an inlet, an outlet, a shell and a centrifugal disc, characterized in that: It includes a crushing section and a shelling section, the feed port is connected with the crushing section, shelling section and discharge port in sequence inside the body shell, the crushing section is provided with a crushing roller, and a delivery groove is spirally provided along the length direction of the crushing roller shaft, the shelling section is provided with a centrifugal disk coaxially connected to the crushing roller through a transmission shaft, and the transmission shaft passes through the body shell at one end of the crushing section, the inner wall of the body shell at the shelling section position is provided with a buffer pad wrapping the centrifugal disk, the body shell at the shelling section position is provided with a discharge port passing through the body shell and the buffer pad, and a retaining wall is provided outside the discharge port.

2. The centrifugal disc shelling device of claim 1, wherein: The centrifugal disk includes centrifugal blades, which are evenly distributed around the central axis of the centrifugal disk as the rotation axis. The centrifugal blades are arc-shaped, with the protrusion of the arc facing the rotation direction of the centrifugal disk.

3. The centrifugal disc shelling device of claim 2, wherein: A return material structure is provided along the circumference of the inner wall of the buffer pad, and the return material structure is corrugated.

4. The centrifugal disc shelling device of claim 2, wherein: A plurality of delivery grooves are evenly arranged along the circumference of the crushing roller. The outer wall of the crushing roller is a variable diameter arc. The diameter of the variable diameter arc gradually increases from the rotation direction of the crushing roller. The shapes of the outer walls of each section of the crushing roller are consistent.

5. The centrifugal disc shelling device of any one of claims 1 to 4, characterized in that: A slag discharge port is provided between the crushing section and the shelling section.

6. The centrifugal disc shelling device of any one of claims 1 to 4, characterized in that: The discharge port is arranged at the machine body shell directly below the shelling section, the centrifugal disc is eccentrically arranged with respect to the machine body shell at the shelling section position, and the centrifugal disc is arranged axially above the machine body shell at the shelling section position.

7. The centrifugal disc shelling device of claim 6, wherein: A blocking section is provided outside the discharge port, and the blocking section includes a collision channel connected to the discharge port, and at least three blocking walls in different directions are provided in the collision channel.

8. The centrifugal disc shelling device of claim 7, wherein: The retaining wall includes a first retaining wall, which is arranged at an angle. The angle between the inclination direction of the first retaining wall and the tangent of the rotation direction of the centrifugal disk extending within the opening range of the discharge port is 45°-90°, and the center position of the first retaining wall is consistent with the center position of the discharge port opening in the vertical direction.

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