Phosphate food additive screening device

Abstract

The invention discloses a phosphate food additive screening device, relates to the technical field of phosphate crushing, and aims to solve the problem of low screening efficiency in the prior art. The device comprises a shell, crushing rollers, a discharging assembly, a screening device and a reciprocating device. The shell is provided with a feeding port and a discharging port, and the two crushing rollers in the shell are driven by a driving device to rotate so as to crush materials. The discharging assembly is connected with a fixed frame and a discharging frame through a material guiding bag, and a moving device drives the discharging frame to reciprocate in the length direction of the shell to achieve dynamic material distribution. And the mounting frame of the screening device and the screen are driven by the reciprocating device to synchronously reciprocate. In the working process, materials are evenly spread to the dynamic screen through the discharging frame after being smashed, the materials make high-frequency contact with the screen through reciprocating motion, and qualified particles are discharged through the screen. Through the combination of dynamic discharging and screening, material accumulation is avoided, the screening rate and the handling capacity are improved, and the device is particularly suitable for food additive materials which are prone to agglomeration.

Description

Technical Field

[0001] The present invention belongs to the technical field of phosphate crushing, and particularly relates to a screening device for phosphate food additives. Background Art

[0002] In the production process of phosphate additives, crushing and screening are one of the key processes. The current mainstream process combines crushing by crushing rollers and screening by a stationary filter screen: First, the lumpy materials are crushed by extrusion and shearing through the crushing rollers, and then the crushed materials are conveyed to the stationary filter screen below, and the separation of particles with different particle sizes is achieved by relying on the self-weight of the materials and the action of gravity.

[0003] However, the above traditional device has fundamental defects: the screening efficiency of the stationary filter screen is low. The specific manifestations are as follows:

[0004] Insufficient material dispersion: The stationary filter screen can only rely on the self-gravity of the materials to fall through the sieve holes, lacking the ability to actively disperse the materials. The crushed materials are prone to form a stacking layer on the sieve surface, resulting in insufficient contact between the lower-layer materials and the sieve mesh. A large number of qualified particles are blocked by the upper-layer materials and cannot pass through the sieve in time, causing the screening process to be slow and incomplete.

[0005] High probability of sieve hole blockage: The sieve holes of the stationary filter screen are in a fixed state. When there are particles in the materials that are close to the sieve hole size (i.e., critical particles), they are prone to get stuck horizontally at the edge of the sieve holes to form a "bridging" phenomenon. Since the filter screen lacks active clogging removal actions such as vibration and rotation, this type of blockage cannot be relieved by itself and requires manual intervention for cleaning, resulting in production interruption. Summary of the Invention

[0006] In view of this, the present invention provides a screening device for phosphate food additives to solve the problem of low screening efficiency of phosphates in the prior art.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A screening device for phosphate food additives, comprising:

[0009] A housing, with a feed inlet and a discharge outlet respectively provided at the upper and lower ends of the housing, and two crushing rollers rotatably connected in the housing. The two crushing rollers are driven by a driving device to rotate respectively;

[0010] A blanking assembly, including a fixed frame, a guide bag, and a blanking frame. The fixed frame is fixed in the housing and is located below the two crushing rollers. The blanking frame is slidably connected in the housing and is located below the fixed frame. The guide bag connects the fixed frame and the blanking frame. The blanking frame is driven by a moving device to reciprocate along the length direction of the housing;

[0011] Sieving device, the sieving device includes a mounting frame and a sieve mesh. The mounting frame is arranged inside the housing and is slidably connected to the housing. Both ends of the housing in the length direction are respectively provided with openings penetrating through. Both ends of the mounting frame are slidably embedded in the two openings. The sieve mesh is fixedly embedded inside the mounting frame and is located below the crushing rollers.

[0012] Reciprocating device, the reciprocating moving component is arranged inside the housing and is used to drive the mounting frame to reciprocate along the length direction of the housing.

[0013] In this technical solution, it should be noted that the housing serves as the basic framework. The feed inlet and the discharge outlet at its upper and lower ends are respectively used for material input and output. The internal space provides a place for the crushing and sieving processes. The openings penetrating through both ends provide a guiding path for the sliding of the mounting frame. The two crushing rollers are respectively rotated through the driving device. The tooth patterns or specific structures on their surfaces form a shearing force and a squeezing force during relative rotation, and the massive phosphate material falling from the feed inlet is broken into smaller particles. They are the core execution components for material crushing. The fixed frame in the feeding component is installed inside the housing and is located below the two crushing rollers. It is connected to the lower feeding frame through a guiding bag. The feeding frame reciprocates along the length direction of the housing under the drive of the moving device to achieve the dynamic conveying of materials. Among them, the fixed frame remains stationary as the inlet end for material transition. The guiding bag is made of a flexible material (such as rubber or canvas), which not only allows the feeding frame to move freely but also prevents dust from spilling out, ensuring that the materials do not leak during the conveying process. Both ends of the mounting frame of the sieving device are slidably embedded in the housing openings, and the sieve mesh is fixed to the inner side of the mounting frame and is located below the feeding component. The reciprocating device drives the mounting frame to reciprocate synchronously, enabling the sieve mesh to obtain the dynamic sieving ability. The overall working principle is as follows: The phosphate material to be processed enters from the feed inlet at the upper end of the housing. The driving device makes the two crushing rollers rotate relatively at a specific speed difference. The material is subjected to extrusion and shearing effects at the gap between the two rollers and is broken into particles with different particle sizes and then falls into the fixed frame and the feeding frame. The moving device drives the feeding frame to perform a reciprocating linear motion along the length direction of the housing, so that the material is evenly spread along the length direction of the housing during the movement of the feeding frame, avoiding concentrated accumulation in a certain area of the sieve mesh. At the same time, the reciprocating device synchronously drives the mounting frame and the sieve mesh to reciprocate along the length direction of the housing. The reciprocating motion of the sieve mesh causes the material to be continuously thrown up and slide down, generating a high-frequency relative motion with the sieve mesh. The qualified particles smaller than the sieve hole size quickly pass through the sieve mesh under the combined action of gravity, inertia force, and the vibration impact force of the sieve mesh and are discharged from the discharge outlet at the lower end of the housing as finished products. The beneficial effects are as follows: The combination of the dynamic feeding and sieving processes avoids the decline in sieving efficiency caused by the concentrated accumulation of materials. The reciprocating motion improves the contact frequency between the material and the sieve mesh, causing the material to form continuous throwing and sliding on the sieve surface, significantly increasing the sieve passing rate and the processing capacity, especially suitable for food additive materials that are prone to agglomeration and have poor fluidity.

[0014] Preferably, the two pulverizing rollers are rotationally connected to the housing via connecting shafts, the two connecting shafts are respectively fixedly sleeved with mutually meshing gears, and one of the connecting shafts is driven by a motor.

[0015] Preferably, a detachable sealing door is provided at the feed inlet.

[0016] Preferably, support legs are provided at the bottom of the shell.

[0017] Preferably, a switch door is provided on one side of the shell.

[0018] Preferably, the reciprocating device includes a moving frame and a cam, the moving frame is fixed on the mounting frame, the cam is rotatably connected to the inner side of the shell through a rotating shaft, the rotating shaft is driven by a motor, and the cam is located in the moving frame. When the cam rotates, it can drive the moving frame to reciprocate along the length direction of the shell.

[0019] In this technical solution, it should be noted that the reciprocating device adopts a cam-moving frame structure, and the various components work together to achieve the reciprocating motion of the screen: one end of the moving frame is fixedly connected to the mounting frame (such as by bolts or welding), and the other end forms an open accommodation space; the cam is an eccentric disk or a component with a specific curve profile, which is horizontally installed on the inside of the shell through a rotating shaft, and one end of the rotating shaft extends out of the shell and is connected to the motor, and the motor drives the rotating shaft to drive the cam to rotate at a constant speed. When the cam rotates, its outer periphery contacts the inner wall of the moving frame, and the change of the eccentricity or contour curve is used to convert the rotational motion into the linear reciprocating motion of the moving frame to form a periodic reciprocating motion, so that the screen obtains a stable linear reciprocating motion trajectory.

[0020] Preferably, two boxes connected to the opening are respectively provided on both sides of the shell in the length direction, a piston is slidably embedded in the box, an air inlet connected to the outside is penetrated on the box, a first one-way valve is provided in the air inlet, and an air outlet connected to the shell is penetrated on the box, the air outlet faces the crushing roller, and a second one-way valve is provided in the air outlet; the air inlet and the air outlet are both located above the piston; a linkage part is provided on the piston, the linkage part transmission connects the mounting frame and the piston, and when the mounting frame moves back and forth, the piston is driven to reciprocate up and down through the linkage part.

[0021] In this technical solution, it should be noted that the box bodies arranged on both sides of the shell in the length direction are connected with the opening, serving as the moving cavity of the piston, and the piston slidably embedded inside is connected with the mounting frame through a linkage part, so that the reciprocating linear motion of the mounting frame can synchronously drive the piston to reciprocate up and down; the air inlet and the air outlet on the box body are both located above the piston, the air inlet passes through the box body and is connected with the external atmosphere, the first one-way valve installed inside only allows air to flow into the box body, the air outlet passes through the box body and is connected with the inside of the shell, the second one-way valve installed inside only allows air to flow into the shell, and the direction of the air outlet is precisely aligned with the roller surface and the roller gap area of the crushing roller to achieve directional airflow blowing. Taking the left box as an example, the specific working process is as follows: when the reciprocating device drives the installation frame to move to the left along the length direction of the shell, the installation frame pushes the piston to move upward through the linkage part. At this time, the volume of the cavity above the box is reduced due to the upward movement of the piston, and the internal air is compressed, resulting in an increase in pressure. When the pressure exceeds the opening threshold of the second one-way valve, the valve plate opens, and compressed air is ejected from the air outlet to the inside of the shell at high speed, directly acting on the roller surface and roller gap of the left crushing roller. The airflow can effectively peel off the colloidal material layer on the roller surface adhered to the hygroscopicity of phosphate, avoid the material wrapping the roller surface and affecting the shear efficiency of the crushing roller, and at the same time impact the block material agglomerates between the roller gaps, so that they are initially dispersed for easy crushing; when the installation frame moves to the right, the piston moves downward, and the volume of the cavity above the box increases due to the downward movement of the piston, forming a negative pressure inside. When the negative pressure reaches the opening condition of the first one-way valve, the first one-way valve opens, and the external air is sucked into the box through the air inlet to reserve the air source for the next jet. The working principle of the right box is symmetrical to that of the left. Both of them alternately inhale and eject air during the reciprocating motion of the mounting frame, forming a periodic pneumatic cycle. This structure directly converts the kinetic energy of the reciprocating motion of the screen into pneumatic energy through the mechanical linkage between the mounting frame and the piston. No additional air source or power device is required. The jet rhythm is completely synchronized with the frequency of the screen movement (each time the mounting frame reciprocates, the piston moves up and down once, completing a "suction-jet" cycle), realizing the multiple functions of cleaning the crushing roller, dispersing material agglomerates and assisting screening, and effectively solving the problems of reduced crushing efficiency and screen clogging caused by the moisture absorption and easy agglomeration of materials in traditional devices.

[0022] Preferably, the linkage part comprises a first guide surface provided on the piston, the first guide surface faces the opening, and the first guide surface is inclined downward in a direction away from the opening. A first spring connected to the bottom of the box body is provided at the bottom of the piston.

[0023] In this technical solution, it should be noted that the first guiding surface of the linkage part and the first spring form a flexible transmission structure: an inclined first guiding surface facing the opening of the housing is provided at the top of the piston, and this first guiding surface extends downward along the direction away from the opening to form an inclined surface that cooperates with the end of the mounting frame; the bottom of the piston is connected to the bottom of the box body through the first spring, and the first spring supports the piston in its natural state to keep it in the initial position. When the mounting frame moves along the length direction of the housing, its end contacts the first guiding surface and pushes the piston upward, reducing the volume of the cavity above the box body, and the air is ejected through the air outlet; when the mounting frame moves to the other side, the end disengages from the first guiding surface, and the piston descends under the action of the restoring force of the first spring, increasing the volume of the cavity above the box body, and the external air is inhaled through the air inlet. The inclined design of the first guiding surface converts the horizontal reciprocating motion of the mounting frame into the vertical motion of the piston, and uses the characteristics of the inclined surface to naturally convert the motion directions of the two without a complex transmission mechanism; the elastic restoring force provided by the first spring ensures that the piston automatically falls back when the mounting frame moves in the reverse direction, avoiding wear caused by rigid contact, and at the same time buffering the impact force during the motion process to make the piston move smoothly.

[0024] Preferably, the moving device includes a connecting frame and a moving seat. The moving seat slides through the side wall of the housing and extends into the box body. A second guiding surface is provided at the bottom of the moving seat. The second guiding surface slopes upward along the direction away from the housing, and the second guiding surface is located above the piston. The connecting frame connects the blanking frame and the moving seat; a guiding column is fixedly connected in the housing. The guiding column is arranged along the length direction of the housing. The blanking frame is slidably sleeved on the guiding column, and both ends of the blanking frame are connected to the housing through second springs.

[0025] In this technical solution, it should be noted that the mobile device consists of a connecting frame, a moving seat, a second guiding surface, guiding columns and second springs to form a core linkage mechanism. Among them, the moving seat is horizontally arranged, the main body slides through the side wall of the housing and extends into the interior of the box body. The bottom is processed with a second guiding surface that slopes upward in the direction away from the housing, and this inclined surface is suspended directly above the piston; the connecting frame is a rigid component, with both ends firmly connected to the moving seat and the blanking frame respectively, ensuring that the horizontal displacement of the moving seat is accurately transmitted to the blanking frame; the guiding columns are fixed to the inner wall of the housing along the length direction of the housing, penetrate the blanking frame and are in sliding fit with it, restricting the blanking frame to only move horizontally back and forth along the length direction of the housing to avoid deflection; two groups of second springs are respectively connected to both ends of the blanking frame and the inner wall of the housing, maintaining the blanking frame at the central position in the natural state, and providing a restoring force through elastic deformation and buffering impacts during movement. When the installation frame is driven by the reciprocating device to move to the right, the piston in the right box body moves upward due to the extrusion of the inclined surface at the end of the installation frame. The top of the piston pushes against the second guiding surface at the bottom of the moving seat. Due to the inclined design of the inclined surface, the vertical upward thrust of the piston is decomposed into a horizontal component force, pushing the moving seat to drive the blanking frame to move leftward along the guiding columns through the connecting frame. At this time, the left spring is compressed and the right spring is stretched; when the installation frame returns to the left, the piston descends and disengages from the second guiding surface, and the blanking frame is reset to the right under the action of the elastic restoring force of the spring, forming a periodic reciprocating motion in the direction opposite to the movement direction of the sieve mesh. This linkage mechanism converts the vertical movement of the piston into the horizontal movement of the blanking frame through the force conduction characteristics of the inclined surface, uses the guiding columns to ensure the accuracy of the movement direction, and realizes flexible reset and impact absorption with the help of the springs, so that the blanking frame and the sieve mesh are always in opposite directions during the movement process. When the blanking frame moves to the left, the material is evenly scattered from one side onto the sieve mesh, and at the same time the sieve mesh moves to the right to spread the material to the other side, forming a cross-dispersion effect, avoiding local accumulation of materials on the sieve surface, and the shearing action generated by the relative movement helps to disperse material agglomerates and improve the screening efficiency; the whole set of mechanisms adopts a pure mechanical linkage design, without the need for an additional power source, with timely response and stable operation. Each component is made of corrosion-resistant materials and the structure is optimized, which is convenient for cleaning and maintenance, meeting the hygiene and reliability requirements of food processing equipment.

[0026] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0027] 1. In the present invention, the dynamic blanking is combined with the screening process, avoiding the decline in screening efficiency caused by the concentrated accumulation of materials; the reciprocating motion improves the contact frequency between the materials and the sieve mesh, making the materials form continuous throwing and sliding on the sieve surface, significantly increasing the passing rate and throughput, especially suitable for food additive materials that are prone to agglomeration and have poor fluidity.

[0028] 2. In the present invention, the kinetic energy of the reciprocating motion of the screen is directly converted into pneumatic energy through the mechanical linkage of the mounting frame and the piston. No additional air source or power device is required, and the jet rhythm is completely synchronized with the movement frequency of the screen (each time the mounting frame reciprocates, the piston moves up and down once, completing an "inhalation-jet" cycle), realizing the multiple functions of crushing roller cleaning, material agglomerate dispersion and screening assistance, and effectively solving the problems of reduced crushing efficiency and screen clogging caused by moisture absorption and easy agglomeration of materials in traditional devices.

[0029] 3. In the present invention, the vertical movement of the piston is converted into the horizontal movement of the feeding frame through the force conduction characteristics of the second guide surface, the guide column is used to ensure the accuracy of the movement direction, and the spring is used to achieve flexible reset and impact absorption, so that the feeding frame and the screen are always in opposite directions during the movement. When the feeding frame moves to the left, the material is evenly scattered from one side to the screen, and at the same time, the screen moves to the right to spread the material to the other side, forming a cross-dispersion effect, avoiding local accumulation of materials on the screen surface, and the shearing effect generated by the relative movement helps to disperse material agglomerates and improve screening efficiency; the whole set of mechanisms adopts a pure mechanical linkage design, does not require an additional power source, responds promptly and runs stably, and each component is made of corrosion-resistant materials and has an optimized structure, which is easy to clean and maintain, and meets the hygiene and reliability requirements of food processing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the rear oblique stereoscopic structure of the present invention;

[0033] Figure 3 It is a schematic diagram of a cross-sectional three-dimensional structure of a housing of the present invention;

[0034] Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure when there are no blanking components and box bodies;

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the mounting frame and the reciprocating device of the present invention;

[0036] Figure 6 It is a three-dimensional structural schematic diagram of the blanking assembly, the reciprocating device and the box body of the present invention;

[0037] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the box body of the present invention;

[0038] Figure 8 It is a three-dimensional structural schematic diagram of the fixing frame, the material guiding bag and the material discharging frame of the present invention;

[0039] Wherein: 1 - housing, 2 - feed inlet, 3 - discharge outlet, 4 - support leg, 5 - switch door, 6 - box body, 8 - connecting shaft, 9 - gear, 10 - motor, 11 - electric machine, 12 - crushing roller, 13 - piston, 14 - mounting frame, 15 - screen, 16 - moving frame, 17 - cam, 18 - air outlet, 19 - second one - way valve, 20 - air inlet, 21 - first one - way valve, 25 - first guiding surface, 26 - opening, 27 - fixed frame, 28 - guiding bag, 29 - blanking frame, 30 - guiding column, 31 - second spring, 32 - moving seat, 33 - second guiding surface. Specific embodiments

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0042] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0044] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include non - direct contact between the first and second features but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0045] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0046] Embodiment 1

[0047] As Figures 1 - 8 shown, an apparatus for screening a phosphate food additive is disclosed in an embodiment of the present invention, including:

[0048] A housing 1, with a feed inlet 2 and a discharge outlet 3 respectively provided at the upper and lower ends of the housing 1. Two crushing rollers 12 are rotatably connected in the housing 1, and the two crushing rollers 12 are driven by a driving device to rotate respectively;

[0049] A blanking assembly, including a fixed frame 27, a guide bag 28 and a blanking frame 29. The fixed frame 27 is fixed in the housing 1 and is located below the two crushing rollers 12. The blanking frame 29 is slidably connected in the housing 1 and is located below the fixed frame 27. The guide bag 28 connects the fixed frame 27 and the blanking frame 29. The blanking frame 29 is driven by a moving device to reciprocate along the length direction of the housing 1;

[0050] A screening device, including a mounting frame 14 and a screen 15. The mounting frame 14 is provided in the housing 1 and is slidably connected to the housing 1. Openings 26 are respectively provided through both ends of the housing 1 in the length direction. Both ends of the mounting frame 14 are slidably embedded in the two openings 26. The screen 15 is fixedly embedded inside the mounting frame 14 and is located below the crushing rollers 12;

[0051] A reciprocating device, provided in the housing 1, for driving the mounting frame 14 to reciprocate along the length direction of the housing 1.

[0052] It should be noted that the housing 1 serves as the basic framework. The feeding port 2 and the discharging port 3 at its upper and lower ends are respectively used for material input and output. The internal space provides a place for the crushing and screening processes. The openings 26 penetrating through both ends provide a guiding path for the sliding of the mounting frame 14. The two crushing rollers 12 are respectively rotated by a driving device. The tooth patterns or specific structures on their surfaces form shear force and extrusion force during relative rotation, breaking the massive phosphate materials falling from the feeding port 2 into smaller particles. They are the core execution components for material crushing. The fixed frame 27 in the blanking assembly is installed inside the housing 1 and below the two crushing rollers 12, and is connected to the lower blanking frame 29 through a guiding bag 28. The blanking frame 29 reciprocates along the length direction of the housing 1 under the drive of a moving device, realizing the dynamic conveying of materials. Among them, the fixed frame 27 remains stationary as the inlet end for material transition. The guiding bag 28 is made of flexible materials (such as rubber or canvas), which not only allows the blanking frame 29 to move freely but also prevents dust from spilling out, ensuring that the materials do not leak during the conveying process. The two ends of the mounting frame 14 of the screening device are slidably embedded in the opening 26 of the housing 1, and the screen 15 is fixed to the inner side of the mounting frame 14 and is located below the blanking assembly. The reciprocating device drives the mounting frame 14 to reciprocate synchronously, enabling the screen 15 to obtain the dynamic screening ability. The overall working principle is as follows: The phosphate materials to be processed enter from the feeding port 2 at the upper end of the housing 1. The driving device makes the two crushing rollers 12 rotate relatively at a specific speed difference. The materials are subjected to extrusion and shearing effects at the gap between the two rollers and are broken into particles with different particle sizes and then fall into the fixed frame 27 and the blanking frame 29. The moving device drives the blanking frame 29 to perform reciprocating linear motion along the length direction of the housing 1, enabling the materials to be evenly spread along the length direction of the housing 1 during the movement with the blanking frame 29, avoiding concentrated accumulation in a certain area of the screen 15. At the same time, the reciprocating device synchronously drives the mounting frame 14 and the screen 15 to reciprocate along the length direction of the housing 1. The reciprocating motion of the screen 15 causes the materials to be continuously thrown up and slide down, generating a high-frequency relative motion with the screen 15. The qualified particles smaller than the screen hole size quickly pass through the screen 15 under the combined action of gravity, inertia force, and the vibration impact force of the screen 15 and are discharged from the discharging port 3 at the lower end of the housing 1 as finished products. The beneficial effects are as follows: The combination of the dynamic blanking and screening processes avoids the decline in screening efficiency caused by the concentrated accumulation of materials. The reciprocating motion improves the contact frequency between the materials and the screen 15, enabling the materials to form continuous throwing and sliding on the screen surface, significantly improving the screen passing rate and throughput, especially suitable for food additive materials that are prone to agglomeration and have poor fluidity.

[0053] As Figure 2 shown, in this embodiment, the two crushing rollers 12 are respectively rotationally connected to the housing 1 through connecting shafts 8. Mutually meshing gears 9 are respectively fixedly sleeved on the two connecting shafts 8, and one of the connecting shafts 8 is driven by a motor 10.

[0054] In this embodiment, a detachable sealing door is provided at the feed inlet 2.

[0055] As Figure 1 shown, in this embodiment, support legs 4 are provided at the bottom of the housing 1.

[0056] As Figure 1 shown, in this embodiment, a switch door 5 is provided on one side of the housing 1.

[0057] Embodiment 2

[0058] As Figures 3 - 5 shown, this embodiment is substantially the same as the above embodiment, except that the reciprocating device includes a moving frame 16 and a cam 17. The moving frame 16 is fixed to the mounting frame 14. The cam 17 is rotatably connected to the inner side of the housing 1 through a rotating shaft. The rotating shaft is driven by a motor 11. The cam 17 is located within the moving frame 16. When the cam 17 rotates, it can drive the moving frame 16 to reciprocate along the length direction of the housing 1. It should be noted that the reciprocating device adopts a cam 17 - moving frame 16 structure, and each component cooperates to achieve the reciprocating movement of the screen 15: One end of the moving frame 16 is fixedly connected to the mounting frame 14 (such as by bolts or welding), and the other end forms an open receiving space; The cam 17 is an eccentric disk or a member with a specific curve profile, horizontally installed inside the housing 1 through a rotating shaft. One end of the rotating shaft extends out of the housing 1 and is connected to the motor 11. The motor 11 drives the rotating shaft to drive the cam 17 to rotate uniformly. When the cam 17 rotates, its outer circumference contacts the inner wall of the moving frame 16. By using the change of the eccentricity or the contour curve, the rotational motion is converted into a linear reciprocating motion of the moving frame 16 to form a periodic reciprocating action, so that the screen 15 obtains a stable linear reciprocating motion trajectory.

[0059] As Figures 3 - 7As shown in the figure, in this embodiment, two boxes 6 communicating with the opening 26 are respectively provided on both sides of the housing 1 in the length direction. A piston 13 is slidably embedded in the box 6. An air inlet 20 communicating with the outside is provided through the box 6. A first one-way valve 21 is provided in the air inlet 20. An air outlet 18 communicating with the housing 1 is also provided through the box 6. The air outlet 18 faces the crushing roller 12. A second one-way valve 19 is provided in the air outlet 18; both the air inlet 20 and the air outlet 18 are located above the piston 13; a linkage part is provided on the piston 13, and the linkage part drives the installation frame 14 and the piston 13 to be connected. When the installation frame 14 reciprocates, the piston 13 is driven to reciprocate up and down through the linkage part. It should be noted that the boxes 6 provided on both sides of the housing 1 in the length direction communicate with the opening 26 and serve as the movement cavity of the piston 13. The slidably embedded piston 13 in it is connected to the installation frame 14 through the linkage part, so that the reciprocating linear motion of the installation frame 14 can synchronously drive the piston 13 to reciprocate up and down; both the air inlet 20 and the air outlet 18 on the box 6 are located above the piston 13. The air inlet 20 penetrates through the box 6 and communicates with the external atmosphere. The first one-way valve 21 installed inside only allows air to flow into the box 6. The air outlet 18 penetrates through the box 6 and communicates with the inside of the housing 1. The second one-way valve 19 installed inside only allows air to flow into the housing 1, and the orientation of the air outlet 18 is accurately aligned with the roller surface and the roller gap area of the crushing roller 12 to achieve directional air flow blowing. Taking the left box 6 as an example, the specific working process is as follows: When the reciprocating device drives the installation frame 14 to move leftward along the length direction of the housing 1, the installation frame 14 pushes the piston 13 upward through the linkage part. At this time, the volume of the upper cavity of the box 6 decreases due to the upward movement of the piston 13, and the internal air is compressed resulting in an increase in pressure. When the pressure exceeds the opening threshold of the second one-way valve 19, the valve plate opens, and the compressed air sprays out from the air outlet 18 at high speed into the inside of the housing 1 and directly acts on the roller surface and the roller gap of the left crushing roller 12. The air flow can effectively peel off the colloidal material layer adhered to the roller surface due to the hygroscopicity of the phosphate, avoiding the material from wrapping the roller surface and affecting the shearing efficiency of the crushing roller 12. At the same time, it impacts the massive material aggregates in the roller gap to preliminarily disperse them for easy crushing; when the installation frame 14 moves rightward, the piston 13 moves downward, and the volume of the upper cavity of the box 6 increases due to the downward movement of the piston 13, forming a negative pressure inside. When the negative pressure reaches the opening condition of the first one-way valve 21, the first one-way valve 21 opens, and the external air is inhaled into the box 6 through the air inlet 20 to reserve the air source for the next jet. The working principle of the right box 6 is symmetrical to that of the left side. The two alternately perform suction and jet during the reciprocating movement of the installation frame 14, forming a periodic pneumatic cycle.Through the mechanical linkage between the mounting frame 14 and the piston 13, the kinetic energy of the reciprocating motion of the screen 15 is directly converted into pneumatic energy without the need for an additional air source or power device. The jetting rhythm is completely synchronized with the movement frequency of the screen 15 (each reciprocation of the mounting frame 14 causes the piston 13 to move up and down once, completing one "air intake - air jet" cycle), realizing multiple functions of cleaning the crushing roller 12, dispersing material agglomerates, and assisting in screening, effectively solving the problems of reduced crushing efficiency and blockage of the screen 15 caused by the easy caking of materials due to moisture absorption in traditional devices.

[0060] As Figures 6 - 7 shown, in this embodiment, the linkage part includes a first guiding surface 25 provided on the piston 13. The first guiding surface 25 faces the opening 26, and the first guiding surface 25 slopes downward in a direction away from the opening 26. A first spring connecting the bottom of the piston 13 to the bottom of the box body 6 is provided. It should be noted that the first guiding surface 25 of the linkage part and the first spring form a flexible transmission structure: an inclined first guiding surface 25 facing the opening 26 of the housing 1 is provided at the top of the piston 13, and the first guiding surface 25 extends downward in a direction away from the opening 26, forming an inclined surface for cooperating with the end of the mounting frame 14; the bottom of the piston 13 is connected to the bottom of the box body 6 through a first spring, and the first spring supports the piston 13 in its natural state to keep it in the initial position. When the mounting frame 14 moves along the length direction of the housing 1, its end contacts the first guiding surface 25 and pushes the piston 13 to rise, reducing the volume of the upper cavity of the box body 6, and air is ejected through the air outlet 18; when the mounting frame 14 moves to the other side, the end disengages from the first guiding surface 25, and the piston 13 descends under the action of the restoring force of the first spring, increasing the volume of the upper cavity of the box body 6, and external air is inhaled through the air inlet 20. The inclined design of the first guiding surface 25 converts the horizontal reciprocating motion of the mounting frame 14 into the vertical motion of the piston 13, and uses the characteristics of the inclined surface to naturally convert the movement directions of the two without the need for a complex transmission mechanism; the elastic restoring force provided by the first spring ensures that the piston 13 automatically falls back when the mounting frame 14 moves in the reverse direction, avoiding wear caused by rigid contact, and at the same time buffering the impact force during the movement process to make the movement of the piston 13 stable.

[0061] Embodiment 3

[0062] As Figures 3 - 8As shown in the figure, this embodiment is substantially the same as the above embodiment, except that the mobile device includes a connecting frame and a moving seat 32. The moving seat 32 slides through the side wall of the housing 1 and extends into the box body 6. A second guiding surface 33 is provided at the bottom of the moving seat 32. The second guiding surface 33 slopes upward in the direction away from the housing 1, and the second guiding surface 33 is located above the piston 13. The connecting frame connects the blanking frame 29 and the moving seat 32. A guiding column 30 is fixedly connected inside the housing 1. The guiding column 30 is arranged along the length direction of the housing 1. The blanking frame 29 is slidably sleeved on the guiding column 30, and both ends of the blanking frame 29 are connected to the housing 1 through second springs 31 respectively. It should be noted that the mobile device consists of a connecting frame, a moving seat 32, a second guiding surface 33, a guiding column 30 and a second spring 31 to form a core linkage mechanism. Among them, the moving seat 32 is horizontally arranged, the main body slides through the side wall of the housing 1 and extends into the interior of the box body 6. The bottom is processed with a second guiding surface 33 that slopes upward in the direction away from the housing 1 and this inclined surface is suspended directly above the piston 13. The connecting frame is a rigid component, and both ends are firmly connected to the moving seat 32 and the blanking frame 29 respectively, ensuring that the horizontal displacement of the moving seat 32 is accurately transmitted to the blanking frame 29. The guiding column 30 is fixed on the inner wall of the housing 1 along the length direction of the housing 1, passes through the blanking frame 29 and is slidably matched with it, restricting the blanking frame 29 to only move horizontally back and forth along the length direction of the housing 1 to avoid deflection. Two groups of second springs 31 are respectively connected between both ends of the blanking frame 29 and the inner wall of the housing 1, maintaining the blanking frame 29 at the central position in the natural state, and providing a restoring force and buffering impact through elastic deformation during movement. When the installation frame 14 is driven by the reciprocating device to move to the right, the piston 13 in the right box body 6 moves upward due to the extrusion of the inclined surface at the end of the installation frame 14. The top of the piston 13 pushes against the second guiding surface 33 at the bottom of the moving seat 32. Due to the inclined design of the inclined surface, the vertical upward thrust of the piston 13 is decomposed into a horizontal component force, pushing the moving seat 32 to drive the blanking frame 29 to move leftward along the guiding column 30 through the connecting frame. At this time, the left spring is compressed and the right spring is stretched. When the installation frame 14 returns to the left, the piston 13 descends and disengages from the second guiding surface 33, and the blanking frame 29 is reset to the right under the action of the elastic restoring force of the spring, forming a periodic reciprocating action in the direction opposite to the movement direction of the screen 15.This linkage mechanism converts the vertical movement of the piston 13 into the horizontal movement of the blanking frame 29 through the force conduction characteristics of the inclined plane, uses the guide posts 30 to ensure the accuracy of the movement direction, and realizes flexible reset and shock absorption with the help of springs, so that the blanking frame 29 and the screen 15 are always in opposite directions during the movement. When the blanking frame 29 moves to the left, the material is evenly scattered from one side onto the screen 15. At the same time, the screen 15 moves to the right to spread the material to the other side, forming a cross-dispersion effect, avoiding local accumulation of materials on the screen surface, and the shearing action generated by the relative movement helps to disperse material agglomerates and improve the screening efficiency. The entire set of mechanisms adopts a pure mechanical linkage design, without the need for an additional power source, with timely response and stable operation. Each component is made of corrosion-resistant materials and the structure is optimized, which is convenient for cleaning and maintenance, meeting the hygiene and reliability requirements of food processing equipment.

[0063] The working principle of the present invention is as follows: the phosphate material to be processed enters from the feed port 2 at the upper end of the shell 1, the detachable sealing door at the feed port 2 is opened when feeding and closed at other times to prevent dust from spilling out, the material falls between the two crushing rollers 12, the driving device drives one of the connecting shafts 8 to rotate through the motor 11, and the two crushing rollers 12 are relatively rotated at a specific speed difference through the mutually meshing gears 9, the shear force and extrusion force generated by the tooth pattern or specific structure of the roller surface break the block material into smaller particles and then fall into the fixed frame 27, the fixed frame 27 is located below the two crushing rollers 12 and remains stationary, and is connected to the fixed frame 27 through the guide bag 28 (made of flexible material, allowing the feed frame 29 to move and prevent leakage) The material is connected to the material discharge frame 29 below, and the crushed material falls into the material discharge frame 29 through the material guide bag 28; at this time, the motor 11 of the reciprocating device drives the rotating shaft to drive the cam 17 to rotate at a constant speed, and the outer periphery of the cam 17 contacts the inner wall of the moving frame 16 fixed on the mounting frame 14, and the rotational motion is converted into the linear reciprocating motion of the moving frame 16 by using the eccentricity or the change of the contour curve, thereby driving the mounting frame 14 and the screen 15 to reciprocate along the length direction of the shell 1. At the same time, the first guide surface 25 at the end of the mounting frame 14 contacts the first guide surface 25 at the top of the piston 13. When the mounting frame 14 moves to the right, its end squeezes the piston 13 of the right box body 6. The inclined design of the first guide surface 25 The horizontal thrust of the mounting frame 14 is converted into the vertical upward force of the piston 13. The piston 13 overcomes the resistance of the first spring at the bottom and moves upward. The volume of the cavity above the box body 6 is reduced. The internal air is compressed and then ejected at high speed through the second one-way valve 19 of the air outlet 18, and the roller surface and roller gap of the right crushing roller 12 are swept directionally, the adhered colloidal materials are peeled off and the block agglomerates are dispersed. The piston 13 of the left box body 6 moves synchronously when the mounting frame 14 moves to the left (the principle is symmetrical), realizing a periodic "intake-jet" cycle; while the mounting frame 14 drives the screen 15 to reciprocate, the second guide surface 33 at the bottom of the moving seat 32 of the moving device (inclined upward in the direction away from the shell 1) is in contact with the movable seat 32 of the movable device. When the top of the plug 13 contacts, the right piston 13 rises, and its vertical upward thrust is decomposed into a horizontal component along the second guide surface 33, pushing the moving seat 32 to drive the unloading frame 29 to move left along the guide column 30 via the connecting frame (the left spring is compressed and the right spring is stretched), so that the movement direction of the unloading frame 29 is opposite to that of the screen 15. When the unloading frame 29 moves to the left, the internal material moves along the length direction of the shell 1 and is evenly spread to the surface of the screen 15 to avoid concentrated accumulation. The reciprocating motion of the screen 15 causes the material to be continuously thrown up and slide down, and generates high-frequency relative motion with the screen 15. Qualified particles smaller than the screen hole size pass through the screen 15 under the action of gravity, inertia and vibration impact of the screen 15.

[0064] The circuits, electronic components and modules involved are all prior art and can be fully implemented by those skilled in the art. Needless to say, the content protected by the present invention does not involve improvements to software and methods.

[0065] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A phosphate food additive screening device, characterized in that, include: A shell (1), wherein the upper and lower ends of the shell (1) are respectively provided with a feed port (2) and a discharge port (3), and the shell (1) is provided with two rotatably connected crushing rollers (12), and the two crushing rollers (12) are driven by a driving device to rotate separately; A material discharge assembly comprises a fixed frame (27), a material guide bag (28) and a material discharge frame (29), wherein the fixed frame (27) is fixed in the housing (1) and located below between the two crushing rollers (12), the material discharge frame (29) is slidably connected in the housing (1) and located below the fixed frame (27), the material guide bag (28) connects the fixed frame (27) and the material discharge frame (29), and the material discharge frame (29) is driven by a moving device to reciprocate along the length direction of the housing (1); A screening device, the screening device comprising a mounting frame (14) and a screen (15), the mounting frame (14) being arranged in a housing (1) and slidably connected to the housing (1), openings (26) being respectively provided at both ends of the housing (1) in the length direction, the two ends of the mounting frame (14) being slidably embedded in the two openings (26), the screen (15) being fixedly embedded in the inner side of the mounting frame (14) and being located below the crushing roller (12); A reciprocating device, wherein the reciprocating moving component is arranged in a shell (1) and is used to drive a mounting frame (14) to reciprocate along the length direction of the shell (1).

2. The screening device for a phosphate food additive according to claim 1, characterized in that, The reciprocating device comprises a moving frame (16) and a cam (17); the moving frame (16) is fixed on the mounting frame (14); the cam (17) is rotatably connected to the inner side of the housing (1) via a rotating shaft; the rotating shaft is driven by a motor (11); the cam (17) is located in the moving frame (16); when the cam (17) rotates, it can drive the moving frame (16) to reciprocate along the length direction of the housing (1).

3. The screening device for a phosphate food additive according to claim 2, wherein, Two boxes (6) connected to the opening (26) are respectively provided on both sides of the shell (1) in the length direction, a piston (13) is slidably embedded in the box (6), an air inlet (20) connected to the outside is penetrated through the box (6), a first one-way valve (21) is provided in the air inlet (20), and an air outlet (18) connected to the shell (1) is also penetrated through the box (6), the air outlet (18) faces the crushing roller (12), and a second one-way valve (19) is provided in the air outlet (18); The air inlet (20) and the air outlet (18) are both located above the piston (13); The piston (13) is provided with a linkage part, which drives the installation frame (14) and the piston (13) to be connected. When the installation frame (14) moves back and forth, the piston (13) is driven to move back and forth up and down through the linkage part.

4. A phosphate food additive screening device according to claim 3, characterized in that, The linkage portion comprises a first guide surface (25) provided on the piston (13), the first guide surface (25) faces the opening (26), and the first guide surface (25) is inclined downward in a direction away from the opening (26).

5. The screening device for a phosphate food additive according to claim 4, characterized in that, The bottom of the piston (13) is provided with a first spring connected to the bottom of the box body (6).

6. The screening device for a phosphate food additive according to claim 4, characterized in that, The mobile device includes a connecting frame and a moving seat (32). The moving seat (32) slides through the side wall of the housing (1) and extends into the box body (6). A second guiding surface (33) is provided at the bottom of the moving seat (32). The second guiding surface (33) slopes upward in a direction away from the housing (1), and the second guiding surface (33) is located above the piston (13). The connecting frame connects the blanking frame (29) to the moving seat (32). A guiding column (30) is fixedly connected inside the housing (1). The guiding column (30) is arranged along the length direction of the housing (1). The blanking frame (29) is slidably sleeved on the guiding column (30), and both ends of the blanking frame (29) are connected to the housing (1) through second springs (31).

7. The screening device for a phosphate food additive according to claim 1, wherein The two crushing rollers (12) are respectively rotatably connected to the housing (1) through connecting shafts (8). Meshing gears (9) are respectively and fixedly sleeved on the two connecting shafts (8). One of the connecting shafts (8) is driven by a motor (10).

8. A screening device for a phosphate food additive according to claim 1, characterized in that, A detachable sealing door is provided at the feed inlet (2).

9. The screening device for a phosphate food additive according to claim 1, characterized in that, Support legs (4) are provided at the bottom of the housing (1).

10. A screening device for a phosphate food additive according to claim 1, characterized in that, A switch door (5) is provided on one side of the housing (1).

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