A pulsed airflow composite precision screening machine for navel orange crisp production

Abstract

The present invention relates to the technical field of flour screening, and discloses a pulsed airflow composite precision screening machine for navel orange pastry production, comprising a base; a screen frame provided on the top of the base, the screen frame being rotatably connected to a rotating shaft via a mounting seat provided on its outer surface, and the rotating shaft passing through the outer wall of the screen frame and extending into the interior thereof, two rotating shafts being provided and symmetrically distributed along the center of the screen frame, sieve plates being fixedly connected to the adjacent surfaces of the two rotating shafts, and a crushing member for crushing flour agglomerates being provided in the screen frame. The pulsed airflow composite precision screening machine for navel orange pastry production can effectively solve the problem in the prior art that the periodic vibration of the screening equipment can cause some agglomerates to accumulate in the edge area of ​​the sieve plate, and as the retention time increases, the sieve holes in this area will become partially clogged, thereby forming a mechanical obstacle to the screening process of qualified fine-grained materials and affecting the flour screening efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of flour screening, in particular to a pulse airflow composite precision screening machine for producing navel orange pastries. Background Art

[0002] In the production of navel orange pastries, precise screening and pretreatment of raw materials is a key step in ensuring product quality. This high-precision screening process effectively removes impurities, agglomerates, and oversized components from the raw material system, achieving uniform particle size distribution. For example, after precise screening, flour particles exhibit excellent dispersion and a narrow particle size distribution. These physical properties promote the formation of a uniform gluten network during baking, ultimately giving navel orange pastries their delicate and crispy texture.

[0003] Since flour particles have a small particle size, their specific surface area is positively correlated with the cumulative effect of van der Waals forces, and they are prone to form soft agglomerates dominated by intermolecular forces. In addition, the periodic vibration of the screening equipment will cause some agglomerates to accumulate in the edge area of ​​the sieve plate. As the residence time increases, the sieve holes in this area will be partially blocked, which will form a mechanical obstacle to the screening process of qualified fine-grained materials and affect the screening efficiency of flour. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a pulse airflow composite precision screening machine for the production of navel orange pastries, which can effectively solve the problem in the prior art that the periodic vibration of the screening equipment will cause some agglomerates to be retained and accumulated in the edge area of ​​the sieve plate. As the retention time increases, the sieve holes in this area will be partially blocked, thereby forming a mechanical obstacle to the screening process of qualified fine-grained materials and affecting the flour screening efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a pulse airflow composite precision screening machine for the production of navel orange pastries, comprising:

[0007] base;

[0008] A sieve frame is provided on the top of the base, and the sieve frame is rotatably connected to a rotating shaft through a mounting seat provided on its outer surface. The rotating shaft passes through the outer wall of the sieve frame and extends into the interior thereof. Two rotating shafts are provided and 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 provided in the sieve frame;

[0009] In which, an adjusting member is provided in the sieve frame for tilting the sieve plate. When the adjusting member is activated, the sieve plate rotates around the axis of the rotating shaft and forms an inclined state, so as to prompt the flour agglomerates on the edge of the sieve plate to move along the surface of the sieve plate.

[0010] Furthermore, the base includes a support seat;

[0011] The support seat is movably connected to a mounting plate via an elastic component arranged on the top thereof, and a vibration unit is arranged inside the mounting plate. The mounting plate is connected to the bottom of the screen frame via a clamp arranged on the outer surface thereof.

[0012] Furthermore, the outer surface of the sieve plate is fixedly connected to a flexible rubber pad that fits the inner wall of the sieve frame, the outer surface of the sieve frame is fixedly connected to a discharge pipe, and the inside of the sieve frame is fixedly connected to a material guide plate, and the material guide plate is conical in design.

[0013] Furthermore, the crushing part includes slots opened on the outer surface of the screen frame, and the slots are provided in two groups and are symmetrically distributed along the center of the screen frame. The slots include movable holes and guide holes, and the movable holes and guide holes are distributed in sequence from top to bottom. The movable holes are rotatably connected to a movable plate through a pin shaft arranged inside the movable hole, and the movable plate is rotatably connected to a pressure block sliding with the inner wall of the screen frame near one end of the screen plate, and the bottom of the pressure block is designed to be inclined.

[0014] Furthermore, an abutment block is slidably connected in the guide hole, and the abutment block is designed with an arc surface on the side close to the screen plate, and a roller is embedded in the arc surface, and a plurality of rollers are provided and distributed in a circular array along the center of the arc surface, and the abutment block is designed with an inclined surface on the side away from the screen plate;

[0015] The outer surface of the sieve frame is fixedly connected to the casing, and the abutment block is connected to the inner wall of the casing through an elastic member arranged on the side away from the sieve plate. The casing is slidably connected to the abutment plate through a fixed plate arranged inside it. The bottom of the abutment plate is rotatably connected to a roller that fits with the inclined surface of the abutment block, and the top of the abutment plate is provided with a notch that fits with the outer side of the movable plate.

[0016] Furthermore, the screen frame is detachably mounted with an annular tube via a tube clamp provided on its inner wall, the outer surface of the annular tube is fixedly connected to an air outlet pipe, and a plurality of the air outlet pipes are provided and distributed in a circular array along the center of the annular tube, and the annular tube is connected to an external air source mechanism via an inlet pipe provided on its outer surface;

[0017] The air outlet pipe close to the pressing block includes a soft tube and a hard tube which are communicated with each other. The hard tube is detachably mounted on the top of the pressing block. The top of the soft tube is communicated with the annular tube.

[0018] Furthermore, the adjusting member includes a push block rotatably connected to the bottom wall of the screen frame, and a guide slope is provided on the top of the push block. A driving member that can be used to drive the push block to rotate is provided inside the screen frame.

[0019] Furthermore, the material guide plate is slidably connected to an adjusting rod through a through hole opened on its conical surface, and two adjusting rods are provided and symmetrically distributed along the center of the material guide plate. Ball blocks are fixedly connected to both ends of the adjusting rod, and the adjusting rod is connected to the bottom of the material guide plate through an elastic part arranged on its outer surface.

[0020] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0021] The present invention is provided with an adjusting member and a crushing member. The adjusting member causes the screen plate to tilt and eliminates edge accumulation. The driving member drives the push block to perform circular motion. When the guide inclined surface of the push block contacts the ball block at the lower end of the adjusting rod, the adjusting rod is pushed upward by the height difference, thereby tilting the screen plate around the rotating axis. In the tilted state, gravity and vibration force act together to cause the agglomerates at the edge of the screen plate to slide to a lower position. The push block rotates continuously, and the screen plate tilts in the opposite direction to achieve reciprocating swing, thereby avoiding long-term accumulation of agglomerates at the edge and ensuring effective utilization of the screening area. The crushing member and the inclined screen plate cooperate to crush the agglomerates. When the screen plate tilts, the edge contacts the arc surface of the abutment block, pushing the abutment block to slide along the guide hole. Its inclined surface drives the abutment plate upward through the roller, and the movable plate acts as a lever to drive the pressing block downward. The bottom slope of the pressing block is parallel to the sieve plate. As the sieve plate tilts back and forth, the pressing blocks on both sides work alternately, ensuring that agglomerates are repeatedly crushed. This is especially effective for large particles accumulated at the edge of the sieve plate, effectively reducing the subsequent processing load, improving crushing efficiency, and reducing large particle residue. At the same time, pulsed airflow clears blockages in the sieve holes. An external air source supplies air to the annular tube through the input pipe, periodically triggering the solenoid valve to release compressed air, forming a pulsed airflow through the outlet pipe. The airflow impacts the sieve holes at a specific angle, using the kinetic energy of the airflow to peel off adhering fine particles. The pulse interval is much longer than the air injection duration, ensuring continuous screening. At the same time, the sieve holes are periodically cleaned to prevent blockage, achieving automatic cleaning of the screen and maintaining screening accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0024] Figure 2Schematic diagram of the three-dimensional separation structure of an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the three-dimensional separation structure of the screen frame, screen plate and guide plate according to an embodiment of the present invention;

[0026] Figure 4 For the embodiment of the present invention Figure 3 A schematic diagram of the partially enlarged structure at point A in the middle;

[0027] Figure 5 Schematic diagram of the cross-sectional structure of the screen frame according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the three-dimensional separation structure of the crushing piece according to an embodiment of the present invention;

[0029] Figure 7 For the embodiment of the present invention Figure 6 A schematic diagram of the structure with a partial enlargement at point B in the middle;

[0030] Figure 8 Schematic diagram of the three-dimensional separation structure of the adjusting member according to an embodiment of the present invention;

[0031] Figure 9 Schematic diagram of the cross-sectional structure of an annular tube according to an embodiment of the present invention;

[0032] Figure 10 For the embodiment of the present invention Figure 9 A schematic diagram of the structure with a partial enlargement at point C in the middle;

[0033] Figure 11 It is a schematic diagram of the three-dimensional transformation structure of the use state of the sieve plate according to an embodiment of the present invention.

[0034] The numbers in the figure represent: 1. base; 11. support seat; 12. mounting plate; 2. screen frame; 21. guide plate; 22. annular tube; 23. exhaust pipe; 3. rotating shaft; 4. screen plate; 5. crushing part; 51. slot; 52. movable plate; 53. pressure block; 54. abutment block; 55. casing; 56. fixed plate; 57. abutment plate; 58. roller; 6. adjusting part; 61. push block; 62. adjusting rod; 63. ball block. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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 only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] The present invention will be further described below with reference to the embodiments.

[0037] Example:

[0038] See also Figures 1-11 The present invention provides a technical solution: a pulse airflow composite precision screening machine for navel orange pastry production, comprising:

[0039] Base 1;

[0040] A sieve frame 2 is provided on top of the base 1. The sieve frame 2 is rotatably connected to a rotating shaft 3 via a mounting seat provided on its outer surface. The rotating shaft 3 penetrates the outer wall of the sieve frame 2 and extends into the interior thereof. Two rotating shafts 3 are provided and 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 inside the sieve frame 2.

[0041] Among them, an adjusting member 6 is provided in the sieve frame 2 for tilting the sieve plate 4. When the adjusting member 6 is started, the sieve plate 4 rotates around the axis of the rotating shaft 3 and forms an inclined state, so as to promote the flour agglomerates on the edge of the sieve plate 4 to move along the surface of the sieve plate 4.

[0042] The base 1 includes a support base 11;

[0043] The support seat 11 is movably connected to a mounting plate 12 via an elastic component arranged on the top thereof, and a vibration unit is arranged inside the mounting plate 12. The mounting plate 12 is connected to the bottom of the screen frame 2 via a clamp arranged on its outer surface.

[0044] The outer surface of the sieve plate 4 is fixedly connected to a flexible rubber pad that fits the inner wall of the sieve frame 2. The outer surface of the sieve frame 2 is fixedly connected to a discharge pipe. The inside of the sieve frame 2 is fixedly connected to a guide plate 21, and the guide plate 21 is conical in design.

[0045] The crushing part 5 includes a slot 51 opened on the outer surface of the screen frame 2, and the slot 51 is provided with two groups and is symmetrically distributed along the center of the screen frame 2. The slot 51 includes a movable hole and a guide hole. The movable hole and the guide hole are distributed in sequence from top to bottom. The movable hole is rotatably connected to a movable plate 52 through a pin arranged inside it, and the movable plate 52 is rotatably connected to one end close to the screen plate 4 with a pressure block 53 that slides with the inner wall of the screen frame 2, and the bottom of the pressure block 53 is designed with an inclined surface.

[0046] An abutment block 54 is slidably connected in the guide hole. The abutment block 54 is designed with an arc surface on the side close to the screen plate 4, and a roller is embedded in the arc surface. There are multiple rollers and they are distributed in a circular array along the center of the arc surface. The abutment block 54 is designed with an inclined surface on the side away from the screen plate 4.

[0047] The outer surface of the screen frame 2 is fixedly connected to the casing 55, and the abutment block 54 is connected to the inner wall of the casing 55 through an elastic member arranged on the side away from the sieve plate 4. The casing 55 is slidably connected to the abutment plate 57 through a fixed plate 56 arranged inside it. The bottom of the abutment plate 57 is rotatably connected to a roller 58 that fits with the inclined surface of the abutment block 54, and the top of the abutment plate 57 is provided with a groove that fits with the outer side of the movable plate 52.

[0048] The screen frame 2 is detachably mounted with an annular tube 22 via a tube clamp provided on its inner wall. An air outlet pipe 23 is fixedly connected to the outer surface of the annular tube 22. A plurality of air outlet pipes 23 are provided and distributed in a circular array along the center of the annular tube 22. The annular tube 22 is connected to an external air source mechanism via an inlet pipe provided on its outer surface.

[0049] The air outlet pipe 23 near the pressing block 53 includes a soft tube and a hard tube that are interconnected. The hard tube is detachably mounted on the top of the pressing block 53 , and the top of the soft tube is interconnected with the annular tube 22 .

[0050] The adjusting member 6 includes a push block 61 rotatably connected to the bottom wall of the screen frame 2 , and a guide slope is provided on the top of the push block 61 . A driving member is provided inside the screen frame 2 for driving the push block 61 to rotate.

[0051] The guide plate 21 is slidably connected to an adjusting rod 62 through a through hole opened on its conical surface, and two adjusting rods 62 are provided and symmetrically distributed along the center of the guide plate 21. Ball blocks 63 are fixedly connected to both ends of the adjusting rod 62. The adjusting rod 62 is connected to the bottom of the guide plate 21 through an elastic part arranged on its outer surface.

[0052] Pulse airflow screening process:

[0053] During operation, the operator uses an external flour conveyor to convey the flour to be sieved into the sieve frame 2. The operator then activates the vibration unit built into the base 1, which, through the excitation force, causes the sieve frame 2 to vibrate at a predetermined frequency and amplitude. During this process, flour particles on the surface of the sieve plate 4 are excited by the vibration. Particles that meet the sieve aperture specifications fall through the sieve apertures to the area below the sieve plate 4 under the combined effects of gravity and inertia, and are discharged from the sieve frame 2 through the discharge pipe.

[0054] During the flour sieving process, the external air source control system periodically triggers the solenoid valve actuator according to preset program parameters, rapidly releasing compressed air from the air tank through the solenoid valve into annular tube 22. This airflow then forms a high-frequency pulsed airflow through outlet pipe 23, impacting the surface and mesh of sieve plate 4 at precise angles and directions. This airflow's kinetic energy effectively removes obstructions from the mesh. By properly setting the ratio between pulse interval and air jet duration (the pulse interval is significantly longer than the air jet duration), the continuous sieving operation is ensured, while also periodically and automatically clearing particles trapped on the sieve surface and within the mesh.

[0055] It is worth noting that the airflow channel within the outlet pipe 23 consists of three parts: a contraction section, a throat, and a divergence section. When compressed air enters the contraction section, the airflow velocity increases exponentially as the cross-sectional area of ​​the pipe gradually decreases, and the pressure drops significantly, forming a local negative pressure environment. At the throat (the point with the smallest cross-sectional area), the airflow velocity reaches the speed of sound, and the pressure drops to its lowest value. After entering the divergence section, the cross-sectional area of ​​the pipe gradually increases, and the airflow velocity gradually decays, efficiently converting the kinetic energy of the high-speed airflow into pressure energy, thereby generating a stable high-speed jet in the pulsed airflow system. This high-speed jet directly acts on the screen surface, significantly removing fine particles adhering to the edges of the screen holes, effectively reducing the probability of screen hole clogging.

[0056] Tilt process of sieve plate 4:

[0057] Due to the high specific surface area characteristics of flour particles, the contact points between particles are dense, and the cumulative effect of van der Waals forces is significant, which makes it very easy to form soft agglomerates (the binding force between particles is a weak interaction and can be dispersed by external forces). When the agglomerate size exceeds the diameter of the sieve hole, it will be retained on the surface of the sieve plate 4. During the continuous vibration of the sieve plate 4, the inertial force repeatedly acts on the agglomerates, causing the weak binding forces between some agglomerate particles to break and disperse into single particles or small agglomerates that meet the screening particle size requirements. Under the combined action of gravity and the vertical component of vibration, qualified fine particles pass through the sieve holes and fall into the lower sieve surface or the discharge port, while the undispersed large agglomerates move from the center to the edge of the sieve plate 4 along a spiral trajectory under the action of the friction force of the screen surface and the combined force of vibration, resulting in the formation of agglomerate accumulation in the edge area of ​​the sieve plate 4, which increases the complexity of the subsequent processing steps.

[0058] To address the problem of agglomerate accumulation at the edge of the sieve plate 4, a drive element at the bottom of the sieve frame 2 is activated, causing the push block 61 to perform uniform circular motion within the sieve frame 2. When the push block 61 contacts the ball block 63 at the lower end of the adjustment rod 62, the ball block 63 slides along the guide slope at the top of the push block 61 until it reaches the flat surface of the push block 61. The height difference between the flat surface and the slope causes the adjustment rod 62 to move upward along the axial through hole, simultaneously compressing the elastic member sleeved around the outer circumference of the adjustment rod 62. The elastic member can be a return spring, a compression spring, or other suitable springs, with the return spring being preferred.

[0059] The upward movement of the adjustment rod 62 can push the sieve plate 4 to rotate around the axis of the rotating shaft 3, so that the sieve plate 4 forms an inclined state in the sieve frame 2. Combined with the continuous action of the vibration system, the agglomerates on the edge of the sieve plate 4 move to the lowest tilted position of the sieve plate 4 under the combined action of gravity and the vibration component. As the push block 61 continues to rotate, the adjustment rod 62 separates from the push block 61. Since the torsion spring on the outer surface of the circumference of the rotating shaft 3 has an elastic restoring force, the sieve plate 4 can be reset to a horizontal state. The push block 61 continues to rotate and contacts the adjustment rod 62 on the other side, causing the sieve plate 4 to tilt in the opposite direction. Through the periodic contact between the push block 61 and the two adjustment rods 62, the sieve plate 4 is able to swing back and forth within the frame, effectively preventing the long-term accumulation of agglomerates at the edge of the sieve plate 4 and ensuring screening efficiency.

[0060] It is worth noting that the flexible rubber pad assembled on the circumferential outer 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, eliminates the motion coupling interference between the two, so as to ensure the smoothness of the motion of the rotating pair of the sieve plate 4, and when the adjusting rod 62 is out of contact with the bottom surface of the sieve plate 4, the displacement disturbance generated by the excitation of the vibration unit does not exceed the elastic restoring force threshold of the torsion spring. At this time, the sieve plate 4 maintains a horizontal posture under the coordinated action of the torsion spring.

[0061] Flour agglomerate breaking process:

[0062] When the sieve plate 4 tilts, its edge contacts the curved working surface of the abutment block 54 and generates normal pressure, pushing the abutment block 54 to slide along the guide hole toward the inside of the housing 55. The abutment block 54 has an arc surface close to the sieve plate 4, and is embedded with multiple rollers in a circular array. When the sieve plate 4 tilts and contacts the abutment block 54, the rollers roll along the edge of the sieve plate 4, converting sliding friction into rolling friction, greatly reducing resistance and making the abutment block 54 slide more smoothly. The arc surface layout of the rollers adapts to the angle change when the sieve plate 4 tilts, ensuring uniform transmission of contact force, avoiding delayed response of the crushing element 5 due to excessive friction, and ensuring that the pressing block 53 presses down in time to crush flour agglomerates.

[0063] The displacement of the abutment block 54, through an inclined mechanism, drives the roller 58 below the abutment plate 57 to roll, thereby driving the abutment plate 57 to translate upward along the fixed plate 56. A lever mechanism composed of the movable plate 52 and the pins converts the linear motion of the abutment plate 57 into the vertical downward motion of the pressing block 53, allowing the pressing block 53 to tightly adhere to the surface of the inclined sieve plate 4. During this adhesion process, the inclined surface of the pressing block 53 crushes the aggregated flour. As the sieve plate 4 reciprocates and tilts, the two pressing blocks 53 work in tandem to continuously crush the flour aggregates until the screening operation is complete.

[0064] It is worth noting that when the sieve plate 4 is tilted to the maximum angle, the surface of the sieve plate 4 and the inclined surface at the bottom of the pressing block 53 are parallel to each other, so that the pressing block 53 can be completely fitted with the sieve plate 4, and ribs are provided on the inclined surface of the pressing block 53. The ribs are evenly distributed along the radial direction of the sieve plate 4, so that the ribs can form a continuous physical barrier on the main path of the agglomerate movement, ensuring that each agglomerate must interact with the ribs multiple times to avoid crushing blind spots. The cross-section of the ribs can be trapezoidal, triangular or arc-shaped, and the triangle is preferred here for easy penetration into the agglomerate. When the pressing block 53 is pressed downward in the vertical direction, the ribs move synchronously with the pressing block 53, crushing the agglomerates through the dual effects of extrusion and shearing, producing continuous extrusion and shearing effects on the agglomerates, and significantly improving the crushing efficiency.

[0065] The present invention is designed with a crushing member 5 and an adjusting member 6, which has the following advantages:

[0066] Advantage 1: The adjustment member 6 tilts the screen plate 4, eliminating edge accumulation. The driving member drives the push block 61 to perform circular motion. When the guide slope of the push block 61 contacts the ball block 63 at the lower end of the adjustment rod 62, the height difference pushes the adjustment rod 62 upward, thereby tilting the screen plate 4 about the rotating shaft 3. In the tilted state, gravity and vibration components work together to cause the agglomerates at the edge of the screen plate 4 to slide to a lower position. When the push block 61 continues to rotate, the screen plate 4 tilts in the opposite direction, achieving reciprocating swing, avoiding long-term accumulation of agglomerates at the edge and ensuring effective utilization of the screening area.

[0067] Advantage two: pulsed airflow clears blockages in the sieve apertures. An external air source supplies air to the annular tube 22 through the inlet pipe, periodically triggering the solenoid valve to release compressed air, which then forms a pulsed airflow through the outlet pipe 23. The airflow strikes the sieve apertures at a specific angle, using the kinetic energy of the airflow to remove adhering fine particles. The pulse interval is much longer than the air jet duration, ensuring continuous screening. At the same time, the sieve apertures are periodically cleaned to prevent blockage, achieving automatic cleaning of the screen and maintaining screening accuracy.

[0068] Advantage three: The crushing element 5 and the inclined screen plate 4 work together to crush agglomerates. When the screen plate 4 tilts, its edge contacts the curved surface of the abutment block 54, pushing the abutment block 54 to slide along the guide hole. Its inclined surface drives the abutment plate 57 upward via the roller 58, and the movable plate 52 acts as a lever to drive the pressure block 53 downward. The bottom inclined surface of the pressure block 53 is parallel to the screen plate 4. When the screen plate 4 tilts back and forth, the pressure blocks 53 on both sides work alternately, ensuring that the agglomerates are repeatedly crushed. This is especially effective for large particles accumulated on the edge of the screen plate 4, effectively reducing the subsequent processing load, improving crushing efficiency, and reducing large particle residue.

[0069] Advantage four: The conical guide plate 21 optimizes material distribution. The guide plate 21 is designed in a conical shape. After the sifted flour enters the screen frame 2 through the feed port, the gravity force is used to evenly distribute the material around it, reducing the problem of excessive flour accumulation in the center area of ​​the screen frame 2 or insufficient material in the edge area, thereby improving the flour discharge efficiency after screening.

[0070] Advantage five: The air outlet pipe 23 near the pressing block 53 is connected to a rigid tube using a hose, balancing airflow stability with the flexibility of the pressing block 53. The rigid tube is fixed to the top of the pressing block 53 and moves up and down with the pressing block 53. The hose connects the rigid tube and the annular tube 22, using 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 rigid tube. When the pressing block 53 is reset, the hose returns to its original shape, ensuring a continuous and stable supply of airflow. This design avoids the problems of pipe breakage or leakage caused by the displacement of moving parts in traditional rigid air circuits, ensuring the reliability of the coordinated operation of the pulse airflow system and the crushing element 5.

[0071] Advantage six: The inclined surface of the pressing block 53 is provided with evenly distributed ribs, and the cross-section of the ribs is triangular in design. The tip of the ribs first penetrates the surface of the flour agglomerates to destroy the connection between the outer particles. As the pressing block 53 continues to press down, the inclined surfaces on both sides of the ribs come into contact with the agglomerate particles. Due to the relative sliding caused by the inclination of the screen plate 4, a shear force is formed between the inclined surface and the particles, tearing the internal structure along the length direction of the ribs, so that the pressing block 53 can not only break up the accumulated agglomerates on the edge of the screen plate 4 during the inclination of the screen plate 4, but also effectively decompose the larger agglomerates into particles that meet the screening particle size through high-frequency and multi-angle mechanical action, fundamentally solving the core problems of agglomerate retention and screen hole blockage in traditional screening equipment.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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 various embodiments of the present invention.

Claims

1. A pulse airflow composite precision screening machine for navel orange pastry production, characterized in that: include: Base (1); A sieve frame (2) is provided on the top of the base (1), the sieve frame (2) is rotatably connected to a rotating shaft (3) via a mounting seat provided on its outer surface, and the rotating shaft (3) passes through the outer wall of the sieve frame (2) and extends into the interior thereof, two rotating shafts (3) are provided and 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), and a sieve plate (4) is fixedly connected to the adjacent surfaces of the two rotating shafts (3), and a crushing member (5) for crushing flour agglomerates is provided in the sieve frame (2); The sieve frame (2) is provided with an adjusting member (6) for tilting the sieve plate (4); 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, so as to cause flour agglomerates on the edge of the sieve plate (4) to move along the surface of the sieve plate (4); The crushing member (5) includes a slotted hole (51) provided on the outer surface of the screen frame (2), and the slotted hole (51) is provided with two groups and is symmetrically distributed along the center of the screen frame (2), the slotted hole (51) includes a movable hole and a guide hole, the movable hole and the guide hole are sequentially distributed from top to bottom, the movable hole is rotatably connected to a movable plate (52) through a pin shaft provided inside the movable hole, and the movable plate (52) is rotatably connected to a pressure block (53) sliding with the inner wall of the screen frame (2) at one end close to the screen plate (4), and the bottom of the pressure block (53) is designed in an inclined surface, and an abutment block (54) is slidably connected in the guide hole, and the abutment block (54) is designed in an arc surface close to the side of the screen plate (4), and A roller is embedded in the arc surface, and a plurality of rollers are provided and distributed in a circular array along the center of the arc surface. The side of the abutment block (54) away from the screen plate (4) is designed with an inclined surface. The outer surface of the screen frame (2) is fixedly connected to the machine shell (55). The abutment block (54) is connected to the inner wall of the machine shell (55) through an elastic member provided on the side away from the screen plate (4). The machine shell (55) is slidably connected to the abutment plate (57) through a fixed plate (56) provided inside the machine shell. The bottom of the abutment plate (57) is rotatably connected to a roller (58) that fits with the inclined surface of the abutment block (54). The top of the abutment plate (57) is provided with a notch that fits with the outer side of the movable plate (52).

2. The pulse airflow composite precision screening machine for navel orange pastry production according to claim 1, characterized in that: The base (1) comprises a support base (11); The support seat (11) is movably connected to a mounting plate (12) via an elastic component arranged on the top thereof, and a vibration unit is arranged inside the mounting plate (12). The mounting plate (12) is connected to the bottom of the screen frame (2) via a clamp arranged on its outer surface.

3. The pulse airflow composite precision screening machine for navel orange pastry production according to claim 1, characterized in that: The outer surface of the sieve plate (4) is fixedly connected to a flexible rubber pad that fits the inner wall of the sieve frame (2); the outer surface of the sieve frame (2) is fixedly connected to a discharge pipe; the interior of the sieve frame (2) is fixedly connected to a guide plate (21), and the guide plate (21) is conical in design.

4. The pulse airflow composite precision screening machine for navel orange pastry production according to claim 3, characterized in that: The screen frame (2) is detachably mounted with an annular tube (22) via a tube clamp provided on its inner wall; an air outlet pipe (23) is fixedly connected to the outer surface of the annular tube (22); and a plurality of the air outlet pipes (23) are provided and distributed in a circular array along the center of the annular tube (22); and the annular tube (22) is connected to an external air source mechanism via an input pipe provided on its outer surface; The air outlet pipe (23) near the pressing block (53) comprises a soft tube and a hard tube that are interconnected. The hard tube is detachably mounted on the top of the pressing block (53). The top of the soft tube is interconnected with the annular tube (22).

5. The pulse airflow composite precision screening machine for navel orange pastry production according to claim 1, characterized in that: The adjusting member (6) comprises a push block (61) rotatably connected to the bottom wall of the screen frame (2), and a guide slope is provided on the top of the push block (61). A driving member for driving the push block (61) to rotate is provided inside the screen frame (2).

6. The pulse airflow composite precision screening machine for navel orange pastry production according to claim 3, characterized in that: The guide plate (21) is slidably connected to an adjusting rod (62) via a through hole provided on its conical surface, and the adjusting rod (62) is provided with two adjusting rods (62) and symmetrically distributed along the center of the guide 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 guide plate (21) via an elastic member provided on its outer surface.

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