Pulse airflow combined type precise screening machine for navel orange crisp production

Abstract

The invention relates to the technical field of flour screening, and discloses a pulse airflow combined type precise screening machine for navel orange crisp production. The screen frame is arranged at the top of the base, the screen frame is rotationally connected with rotating shafts through mounting seats arranged on the outer surface of the screen frame, the rotating shafts penetrate through the outer wall of the screen frame and extend into the screen frame, the number of the rotating shafts is two, the rotating shafts are symmetrically distributed along the center of the screen frame, and the adjacent faces of the two rotating shafts are fixedly connected with a screen plate; and a crushing piece for crushing flour aggregates is arranged in the screen frame. The pulse airflow combined type precise screening machine for navel orange crisp production can effectively solve the problems that in the prior art, due to periodic vibration of screening equipment, part of aggregates are detained and accumulated in the edge area of a screening plate, screening holes in the area can be partially blocked along with prolonging of the detention time, and the screening effect is poor. And therefore, mechanical obstruction is formed in the screening process of qualified fine-grained materials, and the flour screening efficiency is affected.

Description

Technical Field

[0001] The present invention relates to the technical field of flour screening, and particularly to a pulse air flow compound precision sieve for navel orange cake production. Background Art

[0002] In the process of producing navel orange cakes, the precision screening pretreatment of raw materials is the core key process to ensure product quality. Through high-precision screening technology, impurity particles, agglomerates and over-sized components in the raw material system can be effectively removed, and the uniform regulation of the particle size distribution of the material can be realized. Taking flour as an example, the powder particles after precision screening show excellent dispersibility characteristics and a narrow particle size distribution range. This physical property can promote the formation of a uniform gluten network structure during the baking process, and finally endow the navel orange cake with a delicate and crispy taste quality.

[0003] Due to the small particle size of flour particles, the cumulative effect of their specific surface area and van der Waals force shows a positive correlation and increasing trend, and soft agglomerates dominated by intermolecular forces are easily formed. Moreover, the periodic vibration of the screening equipment will cause some agglomerates to accumulate and stay at the edge area of the sieve plate. With the extension of the residence time, partial blockage of the sieve holes in this area will occur, which will mechanically hinder the screening process of qualified fine-grained materials and affect the screening efficiency of flour. Summary of the Invention

[0004] Aiming at the above-mentioned shortcomings of the prior art, the present invention provides a pulse air flow compound precision sieve for navel orange cake production, which can effectively solve the problem in the prior art that the periodic vibration of the screening equipment will cause some agglomerates to accumulate and stay at the edge area of the sieve plate. With the extension of the residence time, partial blockage of the sieve holes in this area will occur, which will mechanically hinder the screening process of qualified fine-grained materials and affect the flour screening efficiency.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: The present invention provides a pulse air flow compound precision sieve for navel orange cake production, comprising: A base; A sieve frame arranged on the top of the base. The sieve frame is rotatably connected with a rotating shaft through a mounting seat arranged on its outer surface, and the rotating shaft penetrates through the outer wall of the sieve frame and extends into its interior. There are two rotating shafts which are symmetrically distributed along the center of the sieve frame. A torsion spring is sleeved on the outer surface of the rotating shaft. A sieve plate is fixedly connected to the adjacent surfaces of the two rotating shafts. A crushing member for crushing flour agglomerates is arranged inside the sieve frame; Wherein, an adjusting member for tilting the sieve plate is arranged inside the sieve frame. When the adjusting member is started, the sieve plate rotates around the axis of the rotating shaft and forms an inclined state to promote the movement of the flour agglomerates at the edge of the sieve plate along the surface of the sieve plate.

[0006] Furthermore, the base includes a support base; The support base is movably connected with a mounting plate through an elastic component arranged on its top, and a vibration unit is arranged inside the mounting plate. The mounting plate is connected with the bottom of the sieve frame through a clamp arranged on its outer surface.

[0007] Furthermore, a flexible rubber pad that fits against the inner wall of the sieve frame is fixedly connected to the outer surface of the sieve plate. A discharge pipe is fixedly communicated with the outer surface of the sieve frame. A guide plate is fixedly connected inside the sieve frame, and the guide plate is designed in a conical shape.

[0008] Furthermore, the crushing member includes slot holes opened on the outer surface of the sieve frame. There are two groups of the slot holes and they are symmetrically distributed along the center of the sieve frame. The slot holes include a movable hole and a guiding hole. The movable hole and the guiding hole are distributed in sequence from top to bottom. The movable hole is rotationally connected with a movable plate through a pin shaft arranged inside it. One end of the movable plate close to the sieve plate is rotationally connected with a sliding block that fits against the inner wall of the sieve frame, and the bottom of the sliding block is designed in an inclined plane.

[0009] Furthermore, a butting block is slidably connected inside the guiding hole. One side of the butting block close to the sieve plate is designed in an arc surface, and a roller is inlayed and installed on the arc surface. There are multiple rollers and they are circumferentially arrayed along the center of the arc surface. One side of the butting block away from the sieve plate is designed in an inclined plane; A machine shell is fixedly connected to the outer surface of the sieve frame. The butting block is connected with the inner wall of the machine shell through an elastic member arranged on its side away from the sieve plate. The machine shell is slidably connected with a butting plate through a fixing plate arranged inside it. A roller that fits against the inclined plane of the butting block is rotationally connected to the bottom of the butting plate. A notch that fits against the outer side of the movable plate is arranged on the top of the butting plate.

[0010] Furthermore, an annular pipe is detachably installed on the inner wall of the sieve frame through a pipe clamp. An air outlet pipe is fixedly communicated with the outer surface of the annular pipe. There are multiple air outlet pipes and they are circumferentially arrayed along the center of the annular pipe. The annular pipe is communicated with an external air source mechanism through an input pipe arranged on its outer surface; The air outlet pipe close to the sliding block includes a flexible pipe and a rigid pipe that are communicated with each other. The rigid pipe is detachably installed on the top of the sliding block. The top of the flexible pipe is communicated with the annular pipe.

[0011] Furthermore, the adjusting member includes a pushing block rotationally connected to the bottom wall of the sieve frame, and a guiding inclined plane is arranged on the top of the pushing block. A driving member that can drive the pushing block to rotate is arranged inside the sieve frame.

[0012] Further, the material guiding plate is slidably connected with adjusting rods through through holes formed in its conical surface, and there are two such adjusting rods which are symmetrically distributed along the center of the material guiding plate. Both ends of the adjusting rods are fixedly connected with spherical blocks, and the adjusting rods are connected with the bottom of the material guiding plate through elastic members arranged on their outer surfaces.

[0013] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: The present invention is provided with an adjusting member and a crushing member. The adjusting member causes the sieve plate to tilt, eliminating edge accumulation. The driving member drives the push block to move in a circular motion. When the guiding inclined surface of the push block contacts the spherical block at the lower end of the adjusting rod, the adjusting rod is pushed upward through the height difference, so that the sieve plate tilts around the rotating shaft. In the tilted state, the combined action of gravity and vibration component forces causes the agglomerates at the edge of the sieve plate to slide towards the lower position. The push block continues to rotate, and the sieve plate tilts in the reverse direction, realizing reciprocating swing, avoiding long-term accumulation of agglomerates at the edge, ensuring the effective utilization of the screening area, and the crushing member and the tilted sieve plate cooperate to crush the agglomerates. When the sieve plate tilts, the edge contacts the arc surface of the abutting block, pushing the abutting block to slide along the guiding hole. Its inclined surface drives the abutting plate to move upward through the roller, and the movable plate acts as a lever to drive the pressing block to move downward. The bottom inclined surface of the pressing block is parallel and attached to the sieve plate. When the sieve plate reciprocates and tilts, the two side pressing blocks work alternately, ensuring that the agglomerates are broken by force multiple times. Especially for the large particles accumulated at the edge of the sieve plate, it effectively reduces the subsequent processing load, improves the crushing efficiency, reduces the residue of large particles. At the same time, the pulsed air flow directionally clears the blockage of the sieve holes. The external air source supplies air to the annular pipe through the input pipe, periodically triggers the solenoid valve to release compressed air, and forms a pulsed air flow through the air outlet pipe. The air flow impacts the sieve holes at a specific angle, using the kinetic energy of the air flow to peel off the adhered fine particles. The pulse interval is much larger than the jet duration, ensuring continuous screening, and at the same time periodically cleaning the sieve holes to prevent blockage, realizing automatic cleaning of the sieve mesh and maintaining the screening accuracy. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 is a three-dimensional separated structural schematic diagram of an embodiment of the present invention; Figure 3 is a three-dimensional separated structural schematic diagram of the sieve frame, sieve plate and material guiding plate of an embodiment of the present invention; Figure 4 is an embodiment of the present invention Figure 3Schematic structural diagram of the partial enlargement at position A in [the relevant part]; Figure 5 Schematic cross-sectional structure diagram of the sieve frame in the embodiment of the present invention; Figure 6 Schematic three-dimensional separation structure diagram of the crushing part in the embodiment of the present invention; Figure 7 In the embodiment of the present invention Figure 6 Schematic structural diagram of the partial enlargement at position B in [the relevant part]; Figure 8 Schematic three-dimensional separation structure diagram of the adjusting part in the embodiment of the present invention; Figure 9 Schematic cross-sectional structure diagram of the annular pipe in the embodiment of the present invention; Figure 10 In the embodiment of the present invention Figure 9 Schematic structural diagram of the partial enlargement at position C in [the relevant part]; Figure 11 Schematic three-dimensional conversion structure diagram of the use state of the sieve plate in the embodiment of the present invention.

[0016] The reference numerals in the figure respectively represent: 1, base; 11, support seat; 12, mounting plate; 2, sieve frame; 21, guide plate; 22, annular pipe; 23, air outlet pipe; 3, rotating shaft; 4, sieve plate; 5, crushing part; 51, slot hole; 52, movable plate; 53, pressing block; 54, abutting block; 55, machine shell; 56, fixing plate; 57, abutting plate; 58, roller; 6, adjusting part; 61, pushing block; 62, adjusting rod; 63, spherical block. Detailed implementation manners

[0017] 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the 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 shall fall within the protection scope of the present invention.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Embodiment:

[0020] Please refer to Figures 1-11 , the present invention provides a technical solution: A pulsed air flow compound precision sieving machine for navel orange cake production, comprising: Base 1; The sieve frame 2 is provided on the top of the base 1. The sieve frame 2 is rotatably connected to a rotating shaft 3 through a mounting seat provided on its outer surface, and the rotating shaft 3 penetrates through the outer wall of the sieve frame 2 and extends into its interior. There are two rotating shafts 3 which are symmetrically distributed along the center of the sieve frame 2. A torsion spring is sleeved on the outer surface of the rotating shaft 3. A sieve plate 4 is fixedly connected to the adjacent surfaces of the two rotating shafts 3. A crushing member 5 for crushing flour agglomerates is provided in the sieve frame 2; Among them, an adjusting member 6 for tilting the sieve plate 4 is provided in the sieve frame 2. When the adjusting member 6 is activated, the sieve plate 4 rotates around the axis of the rotating shaft 3 and forms an inclined state to promote the flour agglomerates at the edge of the sieve plate 4 to move along the surface of the sieve plate 4.

[0021] The base 1 includes a support seat 11; The support seat 11 is movably connected to a mounting plate 12 through an elastic component provided on its top, and a vibration unit is provided in the mounting plate 12. The mounting plate 12 is connected to the bottom of the sieve frame 2 through a clamp provided on its outer surface.

[0022] A flexible rubber pad that fits against the inner wall of the sieve frame 2 is fixedly connected to the outer surface of the sieve plate 4. A discharge pipe is fixedly communicated with the outer surface of the sieve frame 2. A guide plate 21 is fixedly connected inside the sieve frame 2, and the guide plate 21 is designed in a conical shape.

[0023] The crushing member 5 includes slot holes 51 opened on the outer surface of the sieve frame 2. There are two groups of slot holes 51 which are symmetrically distributed along the center of the sieve frame 2. The slot holes 51 include a movable hole and a guiding hole, and the movable hole and the guiding hole are distributed in sequence from top to bottom. The movable hole is rotatably connected to a movable plate 52 through a pin shaft provided in it, and a pressing block 53 that slides against the inner wall of the sieve frame 2 is rotatably connected to one end of the movable plate 52 close to the sieve plate 4, and the bottom of the pressing block 53 is designed with an inclined surface.

[0024] A butting block 54 is slidably connected in the guiding hole. One side of the butting block 54 close to the sieve plate 4 is designed with an arc surface, and a roller is inlayed and installed on the arc surface. There are multiple rollers which are circumferentially arranged along the center of the arc surface. One side of the butting block 54 away from the sieve plate 4 is designed with an inclined surface; A machine shell 55 is fixedly connected to the outer surface of the sieve frame 2. The butting block 54 is connected to the inner wall of the machine shell 55 through an elastic member provided on its side away from the sieve plate 4. The machine shell 55 is slidably connected to a butting plate 57 through a fixing plate 56 provided in it. A roller 58 that fits against the inclined surface of the butting block 54 is rotatably connected to the bottom of the butting plate 57. A notch that fits against the outer side of the movable plate 52 is provided at the top of the butting plate 57.

[0025] The sieve frame 2 is detachably installed with an annular pipe 22 through a pipe clamp provided on its inner wall. An air outlet pipe 23 is fixedly communicated with the outer surface of the annular pipe 22. There are multiple air outlet pipes 23 which are circumferentially arranged along the center of the annular pipe 22. The annular pipe 22 is communicated with an external air source mechanism through an input pipe provided on its outer surface; The air outlet pipe 23 near the briquetting block 53 includes a hose and a hard pipe that are interconnected. The hard pipe is detachably installed on the top of the briquetting block 53, and the top of the hose is interconnected with the annular pipe 22.

[0026] The adjusting member 6 includes a pushing block 61 rotatably connected to the bottom wall of the sieve frame 2, and a guiding inclined surface is provided at the top of the pushing block 61. A driving member for driving the pushing block 61 to rotate is provided inside the sieve frame 2.

[0027] The material guiding plate 21 is slidably connected with adjusting rods 62 through through holes opened on its conical surface. Two adjusting rods 62 are provided and are symmetrically distributed along the center of the material guiding plate 21. Ball blocks 63 are fixedly connected to both ends of the adjusting rod 62, and the adjusting rod 62 is connected to the bottom of the material guiding plate 21 through an elastic member provided on its outer surface.

[0028] Pulse air flow screening process: When the screening equipment is operating, the operator uses an external flour conveying mechanism to convey the flour to be screened into the sieve frame 2. Then, the vibration unit built in the base 1 is started, and under the action of the exciting force, the sieve frame 2 vibrates on the base 1 with a predetermined frequency and amplitude. During this process, the flour particles on the surface of the sieve plate 4 are excited by the vibration. The flour particles that meet the sieve hole size specifications fall to the area below the sieve plate 4 under the combined action of gravity and inertia force, and are discharged from the sieve frame 2 through the discharge pipe.

[0029] During the flour screening process, the external air source control system periodically triggers the solenoid valve actuator according to the preset program parameters, so that the compressed air in the gas storage tank is quickly released into the annular pipe 22 through the solenoid valve, and then a high-frequency pulse air flow is formed through the air outlet pipe 23 to perform a directional impact on the surface and sieve holes of the sieve plate 4 at a precise angle and direction. Utilizing the kinetic energy effect of the air flow, the blockages in the sieve holes are effectively peeled off. By reasonably setting the proportional relationship between the pulse interval time and the jet duration (the pulse interval is much longer than the jet duration), the continuity of the screening operation is ensured, and at the same time, the periodic automatic cleaning of the particles remaining on the sieve surface and inside the sieve holes is realized. It should be noted that the air flow channel in the air outlet pipe 23 consists of a contraction section, a throat section, and a diffusion section. When the compressed air enters the contraction section, as the cross-sectional area of the pipe gradually decreases, the air flow speed increases exponentially, the pressure drops significantly, forming a local negative pressure environment. At the throat (the minimum cross-sectional area), the air flow speed reaches the speed of sound and the pressure drops to the lowest value. After entering the diffusion section, the cross-sectional area of the pipe gradually increases, the air flow speed gradually decays, and the kinetic energy of the high-speed air flow is efficiently converted into pressure energy, thereby generating a stable high-speed jet in the pulse air flow system. This high-speed jet directly acts on the sieve surface and has a significant peeling effect on the fine particles adhering to the edge of the sieve holes, effectively reducing the probability of sieve hole blockage. Sieve plate 4 tilting process: Due to the high specific surface area characteristics of flour particles, the contact points between particles are dense, the cumulative effect of van der Waals forces is significant, and soft agglomerates are extremely easy to form (the binding force between particles belongs to weak interaction and can be dispersed by external force). When the size of the agglomerate exceeds the diameter of the sieve hole, it will stay on the surface of the sieve plate 4. During the continuous vibration of the sieve plate 4, the inertial force acts on the agglomerate repeatedly, causing the weak binding force between some agglomerate particles to break, and dispersing into single particles or small agglomerates that meet the requirements of the screening particle size. The qualified fine particles fall through the sieve holes into the lower sieve surface or the discharge port under the combined action of gravity and the vertical component of vibration, while the undispersed large agglomerates move along the spiral trajectory from the center of the sieve plate 4 to the edge under the action of the frictional force and the resultant force of vibration on the sieve surface, resulting in the formation of an agglomerate accumulation phenomenon in the edge area of the sieve plate 4, increasing the complexity of the subsequent processing procedures. To address the problem of agglomerate accumulation at the edge of the sieve plate 4, by activating the drive member at the bottom of the sieve frame 2, the push block 61 is driven to perform uniform circular motion within the sieve frame 2. When the push block 61 contacts the spherical block 63 at the lower end of the adjusting rod 62, the spherical block 63 slides along the guiding inclined surface at the top of the push block 61 until it reaches the planar position of the push block 61. Due to the height difference between the plane and the inclined surface, the adjusting rod 62 can be prompted to displace upward along the axial through-hole, while compressing the elastic member sleeved on the outer circumferential surface of the adjusting rod 62. The elastic member can be a return spring, a compression spring, etc., and a return spring is preferred here.

[0030] The upward movement of the adjusting rod 62 can push the sieve plate 4 to rotate around its own axis of the rotating shaft 3, causing the sieve plate 4 to form an inclined state within the sieve frame 2. Combined with the continuous action of the vibration system, the agglomerates at the edge of the sieve plate 4 move towards the lowest position of the inclination of the sieve plate 4 under the combined action of gravity and the vibration component force. As the push block 61 continues to rotate, the adjusting rod 62 separates from the push block 61. Due to the elastic restoring force of the torsion spring on the outer circumferential surface of the rotating shaft 3, the sieve plate 4 can be reset to the horizontal state. The push block 61 continues to rotate and contacts the other adjusting rod 62, causing the sieve plate 4 to tilt in the opposite direction. Through the periodic contact between the push block 61 and the two adjusting rods 62, the reciprocating swing of the sieve plate 4 within the frame body is realized, effectively preventing the long-term accumulation of agglomerates at the edge of the sieve plate 4 and ensuring the screening efficiency. It should be noted that the flexible rubber pad assembled on the outer circumferential surface of the sieve plate 4 dissipates the contact stress between the sieve plate 4 and the inner wall of the sieve frame 2 through elastic deformation during the tilting process of the sieve plate 4, eliminating the motion coupling interference between the two, so as to ensure the smooth movement of the rotating pair of the sieve plate 4. And when the adjusting rod 62 is separated from the bottom surface of the sieve plate 4, the displacement disturbance generated by the excitation of the vibration unit does not exceed the elastic recovery force threshold of the torsion spring. At this time, the sieve plate 4 maintains a horizontal posture under the synergistic action of the torsion spring.

[0031] The process of breaking flour agglomerates: When the sieve plate 4 is tilted, its edge contacts the arc-shaped working surface of the abutting block 54 and generates a normal pressure, pushing the abutting block 54 to slide into the casing 55 along the guiding hole. The side of the abutting block 54 close to the sieve plate 4 is an arc surface, with multiple rollers arranged in a circumferential array embedded therein. When the sieve plate 4 contacts the abutting block 54 obliquely, the rollers roll along the edge of the sieve plate 4, converting sliding friction into rolling friction, greatly reducing the resistance and making the sliding of the abutting block 54 smoother. The arc surface layout of the rollers adapts to the angle change when the sieve plate 4 is tilted, ensuring uniform transmission of the contact force, avoiding the response delay of the crushing part 5 due to excessive friction, and ensuring that the pressing block 53 presses down in time to crush the flour agglomerates.

[0032] The displacement of the abutting block 54 drives the roller 58 below the abutting plate 57 to roll through the inclined plane mechanism, and then drives the abutting plate 57 to translate upward along the fixed plate 56. Using the lever mechanism composed of the movable plate 52 and the pin shaft, the linear motion of the abutting plate 57 is converted into the vertical downward motion of the pressing block 53, so that the pressing block 53 is closely attached to the surface of the inclined sieve plate 4. During the attachment process, the inclined plane structure of the pressing block 53 squeezes and crushes the aggregated agglomerates. With the reciprocating tilting motion of the sieve plate 4, the two pressing blocks 53 work together to continuously crush the flour agglomerates until the screening operation is completed.

[0033] It should be noted that when the sieve plate 4 is tilted to the maximum angle, the surface of the sieve plate 4 is parallel to the inclined plane at the bottom of the pressing block 53, which can realize that the pressing block 53 can be completely attached to the sieve plate 4. And ribs are arranged on the inclined plane of the pressing block 53, and the ribs are evenly distributed along the radial direction of the sieve plate 4, which can enable the ribs to form a continuous physical obstacle on the main path of the movement of the agglomerates, ensuring that each agglomerate will necessarily act on the ribs multiple times, avoiding the crushing blind area. The cross-section of the ribs can be trapezoidal, triangular or arc-shaped. Here, the triangular shape is selected for its convenience in cutting into the agglomerates. When the pressing block 53 presses down vertically, the ribs move synchronously with the pressing block 53, crushing the agglomerates through the dual actions of extrusion and shearing, and generating continuous extrusion and shearing actions on the agglomerates, significantly improving the crushing efficiency.

[0034] The present invention is designed with a crushing part 5 and an adjusting part 6, which has the following advantages: Advantage 1: The adjusting part 6 causes the sieve plate 4 to tilt, eliminating edge accumulation. When the driving part drives the pushing block 61 to make a circular motion, when the guiding inclined plane of the pushing block 61 contacts the spherical block 63 at the lower end of the adjusting rod 62, the adjusting rod 62 is pushed upward through the height difference, so that the sieve plate 4 tilts around the rotating shaft 3. In the tilted state, the combined action of gravity and vibration component forces causes the agglomerates at the edge of the sieve plate 4 to slide towards the lower position. The pushing block 61 continues to rotate, and the sieve plate 4 tilts in the reverse direction, realizing reciprocating swing, avoiding long-term accumulation of agglomerates at the edge, and ensuring the effective utilization of the screening area.

[0035] Advantage two: The pulsed air flow is used to direct the cleaning of the blocked sieve holes. The external air source supplies air to the annular pipe 22 through the input pipe, and periodically triggers the solenoid valve to release compressed air, which forms a pulsed air flow through the air outlet pipe 23. The air flow impacts the sieve holes at a specific angle, and uses the kinetic energy of the air flow to peel off the adhered fine particles. The pulse interval is much longer than the jet duration, ensuring continuous screening. At the same time, the sieve holes are periodically cleaned to prevent blockage, realizing automatic cleaning of the sieve mesh and maintaining the screening accuracy.

[0036] Advantage three: The crushing part 5 and the inclined sieve plate 4 cooperate to crush the agglomerates. When the sieve plate 4 is inclined, the edge contacts the arc surface of the abutting block 54, pushing the abutting block 54 to slide along the guiding hole. Its inclined surface drives the abutting plate 57 to move upward through the roller 58, and the movable plate 52 acts as a lever to drive the pressing block 53 to move downward. The bottom inclined surface of the pressing block 53 is parallel and fitted to the sieve plate 4. When the sieve plate 4 reciprocates and inclines, the two side pressing blocks 53 work alternately, ensuring that the agglomerates are broken under force multiple times. Especially for the large particles accumulated at the edge of the sieve plate 4, it effectively reduces the subsequent processing load, improves the crushing efficiency, and reduces the residue of large particles.

[0037] Advantage four: The conical guide plate 21 optimizes the material distribution. The guide plate 21 is designed in a conical shape. After the flour to be screened enters the sieve frame 2 through the feed port, the material is evenly distributed around by using the gravity component force, reducing the problem of excessive flour accumulation in the central area of the sieve frame 2 or insufficient material in the edge area, and improving the flour discharging efficiency after screening.

[0038] Advantage five: The air outlet pipe 23 close to the pressing block 53 is connected by a hose and a hard pipe, taking into account both the air flow stability and the movement flexibility of the pressing block 53. The hard pipe is fixed on the top of the pressing block 53 and moves up and down with the pressing block 53. The hose connects the hard pipe and the annular pipe 22, and uses the flexibility of the hose to compensate for the displacement of the pressing block 53. When the pressing block 53 presses down to crush the agglomerates, the hose can deform freely without affecting the jet direction of the hard pipe. When the pressing block 53 resets, the hose returns to its original state, ensuring continuous and stable air flow supply. This design avoids the problems of pipeline fracture or air leakage caused by the displacement of moving parts in the traditional rigid air path, and ensures the reliability of the coordinated work of the pulsed air flow system and the crushing part 5.

[0039] Advantage six: Uniformly distributed ribs are provided at the inclined surface of the pressing block 53, and the cross-section of the rib is designed in a triangular shape. The tip of the rib first pierces into the surface of the flour agglomerate, breaking the connection between the outer layer particles. As the pressing block 53 continues to press down, the two inclined surfaces of the rib contact the agglomerate particles. Due to the relative sliding caused by the inclination of the sieve plate 4, a shear force is formed between the inclined surface and the particles, tearing the internal structure along the length direction of the rib. When the sieve plate 4 inclines, the pressing block 53 can not only crush the accumulated agglomerates at the edge of the sieve plate 4, but also efficiently decompose the larger agglomerates into particles that meet the screening particle size through high-frequency and multi-angle mechanical actions, fundamentally solving the core problems of agglomerate retention and sieve hole blockage in traditional screening equipment.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pulse air flow compound precision sieve for navel orange cake production, characterized in that Comprising: Base (1); A sieve frame (2) provided on the top of the base (1), the sieve frame (2) is rotatably connected to a rotating shaft (3) through a mounting seat provided on its outer surface, and the rotating shaft (3) penetrates through the outer wall of the sieve frame (2) and extends into its interior. There are two rotating shafts (3) which are symmetrically distributed along the center of the sieve frame (2). A torsion spring is sleeved on the outer surface of the rotating shaft (3). A sieve plate (4) is fixedly connected to the adjacent surfaces of the two rotating shafts (3). A crushing member (5) for crushing flour agglomerates is provided in the sieve frame (2); Wherein, an adjusting member (6) for tilting the sieve plate (4) is provided in the sieve frame (2). When the adjusting member (6) is activated, the sieve plate (4) rotates around the axis of the rotating shaft (3) and forms an inclined state to promote the movement of the flour agglomerates at the edge of the sieve plate (4) along the surface of the sieve plate (4).

2. The pulse air flow compound precision sieve machine for navel orange cake production according to claim 1, wherein: The base (1) includes a support seat (11); The support seat (11) is movably connected to a mounting plate (12) through an elastic component provided on its top, and a vibration unit is provided in the mounting plate (12). The mounting plate (12) is connected to the bottom of the sieve frame (2) through a clamp provided on its outer surface.

3. A pulse air flow compound precision sifting machine for navel orange crisp production according to claim 1, characterized in that: A flexible rubber pad that fits the inner wall of the sieve frame (2) is fixedly connected to the outer surface of the sieve plate (4). A discharge pipe is fixedly communicated with the outer surface of the sieve frame (2). A guide plate (21) is fixedly connected inside the sieve frame (2), and the guide plate (21) is designed in a conical shape.

4. A pulse air flow compound precision sieve for navel orange cake production according to claim 1, characterized in that: The crushing member (5) includes slot holes (51) opened on the outer surface of the sieve frame (2). There are two groups of slot holes (51) which are symmetrically distributed along the center of the sieve frame (2). The slot holes (51) include a movable hole and a guiding hole, and the movable hole and the guiding hole are distributed in sequence from top to bottom. The movable hole is rotatably connected to a movable plate (52) through a pin shaft provided in it. One end of the movable plate (52) close to the sieve plate (4) is rotatably connected to a sliding block (53) that fits the inner wall of the sieve frame (2), and the bottom of the sliding block (53) is designed with an inclined surface.

5. A pulse air flow compound precision sifter for navel orange cake production according to claim 4, characterized in that: A butting block (54) is slidably connected in the guiding hole. One side of the butting block (54) close to the sieve plate (4) is designed with an arc surface, and a roller is fitted and installed in the arc surface. There are multiple rollers which are circumferentially arranged along the center of the arc surface. One side of the butting block (54) away from the sieve plate (4) is designed with an inclined surface; A machine shell (55) is fixedly connected to the outer surface of the sieve frame (2). The butting block (54) is connected to the inner wall of the machine shell (55) through an elastic member provided on its side away from the sieve plate (4). The machine shell (55) is slidably connected to a butting plate (57) through a fixing plate (56) provided in it. The bottom of the butting plate (57) is rotatably connected to a roller (58) that fits the inclined surface of the butting block (54). A notch that fits the outer side of the movable plate (52) is provided at the top of the butting plate (57).

6. The pulse air flow compound precision sieve for navel orange cake production according to claim 4, wherein: The sieve frame (2) is detachably installed with an annular pipe (22) through a pipe clamp arranged on its inner wall. An air outlet pipe (23) is fixedly communicated with the outer surface of the annular pipe (22), and a plurality of the air outlet pipes (23) are provided and are circumferentially arrayed along the center of the annular pipe (22). The annular pipe (22) is communicated with an external air source mechanism through an input pipe arranged on its outer surface; The air outlet pipe (23) close to the pressing block (53) includes a flexible pipe and a rigid pipe which are communicated with each other. The rigid pipe is detachably installed on the top of the pressing block (53), and the top of the flexible pipe is communicated with the annular pipe (22).

7. A pulse air flow compound precision sifter for navel orange crisp production according to claim 1, wherein: The adjusting member (6) includes a pushing block (61) rotatably connected to the bottom wall of the sieve frame (2), and a guiding inclined surface is arranged on the top of the pushing block (61). A driving member for driving the pushing block (61) to rotate is arranged inside the sieve frame (2).

8. A pulse air flow compound precision sifting machine for navel orange cake production according to claim 3, characterized in that: The material guiding plate (21) is slidably connected with an adjusting rod (62) through a through hole formed in its conical surface. Two of the adjusting rods (62) are provided and are symmetrically distributed along the center of the material guiding plate (21). Ball blocks (63) are respectively fixedly connected to both ends of the adjusting rod (62). The adjusting rod (62) is connected to the bottom of the material guiding plate (21) through an elastic member arranged on its outer surface.

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