Cylindrical separating screen

Abstract

A rotor assembly is arranged in an inner cavity of a shell, the rotor assembly comprises a central rotating shaft and an outer barrel which are coaxial, the outer barrel comprises a screen frame rotating barrel, a screen frame and a screen mesh, the screen mesh wraps the screen frame, the screen frame rotating barrel is fixed to the two ends of the screen frame respectively, and the screen frame rotating barrel is fixed to the outer barrel. The centers of the outer end faces of the screen frame rotating cylinders are supported on a center rotating shaft through bearings, and the center rotating shaft and the outer cylinder can rotate oppositely. A plurality of beating plate strips extending in the axial direction of the center rotating shaft are evenly installed on the circumference of the center rotating shaft, a plurality of beating plates are evenly arranged on each beating plate strip, and the free end of each beating plate points to the inner wall of the screen. The screen frame rotary drums are of hollow structures, a feeding port is formed in the upper portion of the screen frame rotary drum at the head end, and a discharging port is formed in the lower portion of the screen frame rotary drum at the tail end. According to the cylindrical separating screen, the separating rate of kernels, shells, fine powder and particles can be increased, the passing rate of screen holes is increased, and the content of the fine powder and the particles in the kernels and the shells on the screen is reduced.

Description

Technical Field

[0001] The utility model relates to a separation and screening device for a pretreatment section in oil production, in particular to a cylindrical separation screen for separating a mixture of sunflower seed kernels, shells, fine powder and particles, and screening out the fine powder and particles in the kernels and shells through a screen, belonging to the technical field of separation screens. Background Art

[0002] In the pretreatment stage of sunflower seed oil production, the sunflower seeds are crushed by the shelling machine to obtain a mixture of kernels, shells, fine powder and particles. The kernels, shells, fine powder and particles in this mixture need to be further separated by screening equipment to reduce the content of fine powder and particles in the kernels and shells, and ultimately reduce the oil content in the sunflower seed kernels and shells.

[0003] Currently, cylindrical screens are commonly used to separate mixtures of kernels, shells, fine powders, and microparticles. The typical structure is as follows: the screen drum rotates, stirring the mixture and conveying it forward under the action of a spiral ribbon. The rotor rotates, and a pusher plate on the rotor drives the mixture along the screen surface, conveying it forward. The screen is fixed, and a rotating brush removes accumulated matter from the screen surface.

[0004] For example, the Chinese utility model patent with announcement number CN202984048U discloses a double-drum primary cleaning screen, which includes a shell and a casing mounted on the shell, wherein a rotor and a screen drum are provided in the shell, and the screen drum includes an inner screen and an outer screen arranged coaxially, and the front end of the screen drum is higher than the rear end and is installed on the shell at an angle, and the rear end of the screen drum is equipped with an adjustment mechanism; the rotor includes a beating plate, a brush, a bracket and a main shaft, the beating plate and the brush are installed at the end of the bracket and are inclined with respect to the main shaft, the bracket is installed on the main shaft, and the beating plate and the brush are provided with an adjusting nut for adjusting the gap between the beating plate and the brush and the screen drum.

[0005] The Chinese utility model patent with announcement number CN208554928U discloses a new cylindrical primary cleaning screen equipment, which has a feed inlet and an air intake on the top of the body, a debris outlet, a grain outlet and support legs on the bottom of the body, a maintenance door on one side of the body, and a transmission device mounting plate on the other side. The transmission device mounting plate is equipped with a transmission main shaft mounting seat, a motor mounting seat and a protective cover. The transmission main shaft mounting seat is equipped with a transmission main shaft, and the motor is equipped with a motor on the motor mounting seat. The motor shaft is connected to the reducer.

[0006] The above technical solutions have the following deficiencies: 1. The internal rotor speed is low, the impact force is insufficient, and the separation of fine powder and particles in kernels and shells is incomplete;

[0007] 2. It is difficult to clean the screen holes by using a brush to remove the deposits on the screen surface;

[0008] 3. The screen is easily clogged, resulting in a low fine powder removal rate, and the kernel and shell contain more fine powder and particles. Utility Model Content

[0009] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and utility model title of this application, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0010] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0011] The purpose of the utility model is to overcome the problems existing in the prior art and provide a cylindrical separation screen, which can improve the separation rate of kernels, shells, fine powder and particles, and increase the sieve hole pass rate, and reduce the content of fine powder and particles in the kernels and shells on the sieve.

[0012] In order to solve the above technical problems, the utility model provides a cylindrical separation screen, comprising a shell, an inner cavity of the shell is provided with a rotor assembly, the rotor assembly comprises a coaxial central shaft and an outer cylinder, the outer cylinder comprises a screen frame drum, a screen frame and a screen, the screen is coated on the screen frame, the screen frame drum is respectively fixed to both ends of the screen frame, the outer end surface center of the screen frame drum is respectively supported on the central shaft by bearings, and the central shaft and the outer cylinder can rotate in opposite directions;

[0013] A plurality of beating strips extending along the axial direction are evenly installed on the circumference of the central rotating shaft, and a plurality of beating plates are evenly arranged on each beating strip, and the free end of each beating plate points to the inner wall of the screen;

[0014] The screen frame drums are respectively hollow structures, and a feed port is provided above the head end screen frame drum, and a discharge port is provided below the tail end screen frame drum.

[0015] As an improvement of the present invention, a driving motor and a reducer are respectively installed on the top of both ends of the shell, a large pulley is installed at one end of the central rotating shaft, a small pulley is installed at the other end of the central rotating shaft, and a sprocket is fixed to one end of the outer cylinder; the pulley of the driving motor is connected to the large pulley through a primary transmission belt, the small pulley is connected to the input end of the reducer through a secondary transmission belt, and the output end of the reducer is connected to the sprocket through a transmission chain.

[0016] As a further improvement of the present invention, a conical hopper for collecting fine powder is provided at the bottom of the shell, and a fine powder auger is provided at the bottom of the conical hopper.

[0017] As a further improvement of the present invention, the beating plates are parallel to each other and have an inclination angle with the axis of the central rotating shaft.

[0018] As a further improvement of the present invention, the inclination angle is 60°, and the rear edge in the rotating forward direction is inclined toward the discharge end.

[0019] As a further improvement of the present invention, a purging device is provided on the outside of the screen, and the purging device includes a purging pipe, a support sleeve and a cylinder. The purging pipe extends along the full length of the screen frame, and a row of small blowing holes is opened on the side of the purging pipe facing the screen. The two ends of the purging pipe pass through the support sleeve respectively, the cylinder body of the cylinder is fixed on the cylinder bracket, the piston rod of the cylinder is connected to one end of the purging pipe, and the support sleeve and cylinder bracket are fixed on the shell.

[0020] Compared with the prior art, the present invention has achieved the following beneficial effects: 1. A single motor drives the rotor to rotate at high speed through a belt chain, while the external screen rotates slowly in the same direction; the central rotating shaft is equipped with multiple beating strips on the circumference, and the central rotating shaft rotates at high speed, driving each beating strip to impact the mixture of kernel, shell, fine powder and microparticles, thereby promoting the separation of kernel, shell, fine powder and microparticles, especially the complete separation of kernel and shell;

[0021] 2. The outer screen rotates slowly, bearing the impact of the mixture of kernels, shells, fine powder and particles, while screening out the fine powder and particles in the kernels and shells; the sieve holes on the screen are transparent, and the fine powder and particles in the kernels and shells on the screen are very small;

[0022] 3. The purge device moves back and forth in a straight line under the action of the cylinder, the screen rotates slowly, and the compressed air is blown directly onto the screen surface through the purge pipe to clean the clogged screen holes;

[0023] 4. The beating plate has an inclination, which can separate the mixture while conveying it to the discharge end. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. The drawings are only provided for reference and explanation, and are not intended to limit the present invention. Among them:

[0025] Figure 1 This is a three-dimensional diagram of the cylindrical separation screen of the utility model;

[0026] Figure 2 This is a front cross-sectional view of the cylindrical separation screen of the utility model;

[0027] Figure 3 This is a side sectional view of the cylindrical separation screen of the utility model;

[0028] Figure 4 A perspective view of the rotor assembly of the present invention;

[0029] Figure 5 This is a front cross-sectional view of the rotor assembly in the present invention;

[0030] Figure 6 This is a three-dimensional diagram of the rotor plate in the utility model;

[0031] Figure 7 This is a top view of the rotor plate in the utility model;

[0032] Figure 8 This is a front view of the purge device in the present utility model;

[0033] In the figure: 1. Drive motor; 2. Primary transmission belt; 3. Rotor assembly; 4. Secondary transmission belt; 5. Reducer; 6. Drive chain; 7. Feed inlet; 8. Discharge outlet; 9. Housing; 10. Fine powder auger; 11. Center shaft; 12. Screen frame drum; 13. Screen frame; 14. Screen; 15. Small pulley; 16. Sprocket; 17. Large pulley; 18. Beating strips; 19. Beating plate; 20. Purge device; 21. Purge pipe; 22. Cylinder; 23. Support sleeve; 24. Cylinder bracket. DETAILED DESCRIPTION

[0034] In the following description of the present invention, the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device must have a specific direction.

[0035] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the embodiments described are only a part of the present invention, not all of the embodiments.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] like Figures 1 to 8 As shown, the cylindrical separation screen of the present invention includes a drive motor 1, a primary transmission belt 2, a rotor assembly 3, a secondary transmission belt 4, a reducer 5, a housing 9, a fine powder auger 10, beating bars 18 and a purge device 20.

[0038] The rotor assembly 3 includes a central rotating shaft 11, a screen frame drum 12, a screen frame 13, a screen mesh 14, a small pulley 15, a sprocket 16, and a large pulley 17. Six slat bars 18 extending axially along the circumference of the central rotating shaft 11 are evenly mounted. The screen frame drum 12, the screen frame 13, the screen mesh 14, and the like form an outer cylinder. The screen frame drum 12 is a hollow structure, and the sprocket 16 is fixed to one end of the outer cylinder. Multiple slats 19 are evenly welded to the slat bars 18. Each slat 19 is parallel to each other and has an inclination angle of approximately 60° with the axis of the slat bar 18. This ensures that when the slat bars 18 rotate with the central rotating shaft 11, each slat 19 has a larger impact area on the material, which facilitates the movement of the material toward the discharge end.

[0039] A driving motor 1 is installed on the top of one end of the shell 9, and a reducer 5 is installed on the top of the other end of the shell 9. A large pulley 17 is installed on one end of the central rotating shaft 11, and a small pulley 15 is installed on the other end of the central rotating shaft 11. The pulley of the driving motor is connected to the large pulley 17 through a primary transmission belt 2, and the small pulley 15 is connected to the input end of the reducer 5 through a secondary transmission belt 4. The output end of the reducer 5 is connected to the sprocket 16 through a transmission chain 6.

[0040] The driving motor 1 drives the large pulley 17 to rotate through the primary reduction transmission of the primary transmission belt 2, and the large pulley 17 drives the central shaft 11 to rotate. The central shaft 11 and the beating strips 18 and beating plates 19 thereon rotate at high speed under the primary reduction transmission.

[0041] At the same time, the small pulley 15 at the other end of the rotor assembly 3 drives the outer cylinder composed of the screen frame drum 12, the screen frame 13, and the screen mesh 14 to rotate slowly in the same direction through the secondary reduction transmission of the secondary transmission belt 4, the tertiary reduction transmission of the reducer 5, and the four-stage reduction transmission of the reducer 5, the transmission chain 6 and the sprocket 16.

[0042] A mixture of sunflower seed kernels, shells, fine powder, and fine particles enters the screen frame drum 12 at the head end through the feed port 7. The high-speed rotating beating plate 19 strikes the mixture, while the screen frame 13 and screen 14 withstand the impact of the mixture. Together, they separate the kernels, shells, fine powder, and fine particles from the mixture. The fine powder and fine particles pass through the screen 14 and fall into the conical hopper of the housing 9. They are collected and discharged by the fine powder auger 10 at the bottom of the conical hopper. The angled beating plate 19, while striking the mixture, pushes the kernels and shells that pass through the sieve toward the discharge port 8 for discharge.

[0043] The purge device 20 is mounted on one side of the housing 9 and consists of a purge pipe 21, a cylinder 22, a support sleeve 23, and a cylinder bracket 24. The purge pipe 21 has a row of small spray holes on the side facing the screen 14. Both ends of the purge pipe 21 pass through the support sleeve 23. The cylinder 22 is fixed to the cylinder bracket 24, which is fixed to the housing 9.

[0044] Compressed air is blown directly onto the screen 14 through the small holes in the purge pipe 21, clearing any obstructions within the mesh and dust from the outer surface, leaving the mesh clear. While the compressed air is blowing through the screen 14, the screen 14 rotates slowly, and the purge pipe 21, driven by the cylinder 22, reciprocates linearly. These three elements work simultaneously to ensure that the entire mesh remains clear and unobstructed, filtering out fine powder and particles from the mixture and ensuring that the content of fine powder and particles in the kernels and shells on the sieve meets process requirements.

[0045] The above description is only a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention, but does not limit the scope of patent protection of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. In addition to the above embodiments, the present invention may have other implementation methods without departing from the spirit and scope of the present invention. The present invention may also have various changes and improvements, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the attached claims and their equivalents. Technical features not described in the present invention can be achieved by or using existing technologies, and will not be described here.

Claims

1. A cylindrical separation screen, comprising a shell, characterized in that: The inner cavity of the shell is provided with a rotor assembly, which includes a coaxial central shaft and an outer cylinder, the outer cylinder includes a screen frame drum, a screen frame and a screen, the screen is covered on the screen frame, the screen frame drum is fixed to both ends of the screen frame, the outer end surface center of the screen frame drum is supported on the central shaft by bearings, and the central shaft and the outer cylinder can rotate in opposite directions; A plurality of beating strips extending along the axial direction are evenly installed on the circumference of the central rotating shaft, and a plurality of beating plates are evenly arranged on each beating strip, and the free end of each beating plate points to the inner wall of the screen; The screen frame drums are respectively hollow structures, and a feed port is provided above the head end screen frame drum, and a discharge port is provided below the tail end screen frame drum.

2. The cylindrical separation screen according to claim 1, characterized in that: A driving motor and a reducer are respectively installed on the top of both ends of the shell, a large pulley is installed at one end of the central rotating shaft, a small pulley is installed at the other end of the central rotating shaft, and a sprocket is fixed to one end of the outer cylinder; the pulley of the driving motor is connected to the large pulley through a primary transmission belt, the small pulley is connected to the input end of the reducer through a secondary transmission belt, and the output end of the reducer is connected to the sprocket through a transmission chain.

3. The cylindrical separation screen according to claim 1, characterized in that: A conical hopper for collecting fine powder is provided at the bottom of the shell, and a fine powder auger is provided at the bottom of the conical hopper.

4. The cylindrical separation screen according to claim 1, characterized in that: The beating plates are parallel to each other and have an inclination angle with the axis of the central rotating shaft.

5. The cylindrical separation screen according to claim 4, characterized in that: The inclination angle is 60°, and the rear edge in the rotational forward direction is inclined toward the discharge end.

6. The cylindrical separation screen according to claim 1, characterized in that: A purging device is provided on the outside of the screen, and the purging device includes a purging pipe, a support sleeve and a cylinder. The purging pipe extends along the full length of the screen frame, and a row of small blowing holes is opened on the side of the purging pipe facing the screen. The two ends of the purging pipe pass through the support sleeve respectively, the cylinder body of the cylinder is fixed on the cylinder bracket, the piston rod of the cylinder is connected to one end of the purging pipe, and the support sleeve and cylinder bracket are fixed on the shell.

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