Screen body air inlet structure and powder cleaning machine

Abstract

The utility model provides a screen body air inlet structure and a powder cleaning machine. The screen body air inlet structure comprises a flow guide plate, a cross beam, a first air guide plate, a second air guide plate and an overhaul valve. Wherein the flow guide plate is connected to the interior of the screen body and used for guiding undersize materials to fall into the undersize material receiving groove; the cross beam is arranged at the bottom of the screen body and used for being connected with a screen underflow receiving groove. The first air guide plate is connected to the screen body and located above the flow guide plate, and a first air inlet is formed between the first air guide plate and the flow guide plate; the second air guide plate is connected above the cross beam and located below the flow guide plate, an overhaul window is formed between the second air guide plate and the flow guide plate, and a second air inlet is formed between the second air guide plate and the cross beam; the overhaul valve is connected to the second air guide plate and is in lap joint with the flow guide plate, and the overhaul valve is used for sealing the overhaul window. According to the screen body air inlet structure and the flour cleaning machine, materials in the screen body can be prevented from leaking outwards, and meanwhile the air inlet efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flour processing equipment, and particularly relates to an air inlet structure of a sieve body and a purifier. Background Technique

[0002] A purifier is used to separate endosperm particles with different purities from the materials ground by a flour mill. It consists of a sieve body equipped with multiple layers of sieve surfaces, along with air ducts, air chambers, etc. Each layer of sieve surface is formed by connecting multiple sieve grids equipped with sieve meshes of different mesh numbers in series. When the purifier works, the air flow passes through each layer of sieve surface from the bottom to the top of the sieve body in sequence, and then enters the air chamber above the sieve body. The combined action of vibration and air flow can make the materials entering the purifier loose and separate according to specific gravity, particle shape, surface properties, and aerodynamic characteristics. Among them, the light bran is sucked away by the air flow, and the endosperm with skin is output as oversize material and sent back to the flour mill for recycling to remove the endosperm particles with skin. The pure and relatively pure endosperm particles enter the flour mill as undersize material for further grinding into flour.

[0003] Currently, most purifiers are provided with air inlet nets on the side walls of the sieve body. The specific position is roughly above the undersize material receiving trough and below the undersize material distributing mechanism. This position is not only used for air inlet but also for maintenance personnel to adjust and maintain the undersize material distributing mechanism inside the sieve body. However, the disadvantage of this air inlet method is that if the mesh holes of the air inlet net are too small, there will be problems of low air inlet efficiency and small air volume, affecting the purifying quality. If the mesh holes are too large, it is easy to cause the materials to leak out when passing through the undersize material distributing mechanism, resulting in waste, which urgently needs to be solved. Content of the Utility Model

[0004] The embodiment of the utility model provides an air inlet structure of a sieve body and a purifier, aiming to improve the air inlet efficiency of the sieve body and avoid material leakage and waste.

[0005] To achieve the above object, the technical solution adopted by the utility model is: In the first aspect, an air inlet structure of a sieve body is provided, including a guide plate, a cross beam, a first air guide plate, a second air guide plate, and a maintenance access door; wherein, the guide plate is connected inside the sieve body and is used to guide the undersize materials to fall into the undersize material receiving trough; the cross beam is arranged at the bottom of the sieve body and is used to connect the undersize material receiving trough; the first air guide plate is connected to the sieve body and is located above the guide plate, and a first air inlet is formed between the first air guide plate and the guide plate; the second air guide plate is connected above the cross beam and is located below the guide plate, a maintenance window is formed between the second air guide plate and the guide plate, and a second air inlet is formed between the second air guide plate and the cross beam; the maintenance access door is connected to the second air guide plate and overlaps with the guide plate, and the maintenance access door is used to cover the maintenance window.

[0006] In combination with the first aspect, in a possible implementation, the edge of the deflector facing the outside of the sieve body is bent downward to form a reinforcing flange; the first air guide plate includes a first plate body and a second plate body arranged at an angle; wherein, the first plate body is located outside the reinforcing flange and forms a first air inlet between the first plate body and the reinforcing flange, and the second plate body extends obliquely downward directly above the reinforcing flange to block the first air inlet.

[0007] In some embodiments, the cross beam includes an inner plate and an outer plate; the lower end of the inner plate is used to connect the under-sieve material receiving trough, and the upper end is bent obliquely toward the outside of the sieve body to form a material blocking surface; the upper end of the outer plate is bent obliquely toward the inside of the sieve body to form an air guiding surface connected to the material blocking surface; wherein, a second air inlet is formed between the second air guide plate and the air guiding surface.

[0008] Exemplarily, the second air guide plate includes a third plate body and a fourth plate body connected to form an angle; a folded edge bent toward the inside of the sieve body is provided at the lower end of the third plate body, and a second air inlet is formed between the folded edge and the air guiding surface; the fourth plate body blocks directly above the material blocking surface.

[0009] For example, the fourth plate body extends obliquely downward from the outside to the inside, and the lower end of the fourth plate body is bent vertically downward to form a blocking edge.

[0010] In a possible implementation, a plurality of support rods are distributed at intervals on the material blocking surface, each support rod vertically passes through the fourth plate body and is fixedly connected to the fourth plate body, and the top end of the support rod passing through the fourth plate body is used to connect the maintenance access door.

[0011] In some embodiments, the maintenance access door includes a plurality of door panel units adjacent to each other in sequence, the two sides of the lower end of each door panel unit are respectively hinged to the top ends of two adjacent support rods, and the upper end of the door panel unit is movably connected to the deflector.

[0012] Exemplarily, a retaining strip is provided on the deflector, and a maintenance window is formed between the connecting part of the third plate body and the fourth plate body and the retaining strip; the upper edge of the door panel unit overlaps the retaining strip so that the door panel unit forms an inclined closed state.

[0013] For example, the edge of the maintenance access door close to the deflector is continuously bent to form a side groove.

[0014] The beneficial effects of the air inlet structure of the sieve body provided by the present utility model are as follows: Compared with the prior art, in the air inlet structure of the sieve body of the present utility model, a first air inlet is formed between the first air guide plate and the air deflector, and a second air inlet is formed between the second air guide plate and the cross beam. Thus, it is possible to simultaneously introduce air into the sieve body through the upper and lower air inlets, thereby improving the air inlet efficiency; the inspection window formed between the second air guide plate and the air deflector is covered by the inspection flap. This not only enables the adjustment and inspection of the under-sieve material distribution mechanism by opening the inspection flap, but also the closed inspection flap can hermetically block the inspection window, thereby preventing the material from leaking out through the inspection window under the disturbance of the under-sieve material distribution mechanism. At the same time, it can also prevent foreign substances from falling into the sieve body through the inspection window and causing pollution, thereby improving the material hygiene standard.

[0015] Secondly, the embodiment of the present utility model also provides a purifier, including the above-mentioned air inlet structure of the sieve body.

[0016] The beneficial effects of the purifier provided by the present utility model are as follows: Compared with the prior art, the purifier of the present utility model adopts the above-mentioned air inlet structure of the sieve body, and simultaneously introduces air into the sieve body through the upper and lower air inlets, thereby improving the air inlet efficiency; the inspection window formed between the second air guide plate and the air deflector is covered by the inspection flap. This not only enables the adjustment and inspection of the under-sieve material distribution mechanism by opening the inspection flap, but also the closed inspection flap can hermetically block the inspection window, thereby preventing the material from leaking out through the inspection window under the disturbance of the under-sieve material distribution mechanism. At the same time, it can also prevent foreign substances from falling into the sieve body through the inspection window and causing pollution, thereby improving the material hygiene standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structure schematic diagram of the air inlet structure of the sieve body provided by the embodiment of the present utility model;

[0018] Figure 2 is the sectional structure schematic diagram along the Figure 1 A-A line in

[0019] Figure 3 is the front view structure schematic diagram of the purifier provided by the embodiment of the present utility model.

[0020] In the figure: 10, air deflector; 100, inspection window; 11, reinforcing flange; 12, retaining strip; 20, cross beam; 21, inner plate; 211, material retaining surface; 212, support rod; 22, outer plate; 221, air guiding surface; 30, first air guide plate; 300, first air inlet; 31, first plate body; 32, second plate body; 40, second air guide plate; 400, second air inlet; 41, third plate body; 411, folded edge; 42, fourth plate body; 421, retaining edge;

[0021] 50. Maintenance flap; 51. Door panel unit; 52. Side groove; 60. Sieve body; 70. Under-sieve material receiving trough; 80. Under-sieve material distribution mechanism. Detailed implementation mode

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or several of such features. In the description of the present application, the meaning of "a plurality" and "several" is two or more, unless otherwise specifically defined.

[0024] Please refer to Figures 1 to 3 , and now the air inlet structure of the sieve body 60 provided by the present utility model will be described. The air inlet structure of the sieve body 60 includes a flow guide plate 10, a cross beam 20, a first air guide plate 30, a second air guide plate 40, and a maintenance flap 50; wherein, the flow guide plate 10 is connected inside the sieve body 60 and is used to guide the under-sieve material to fall into the under-sieve material receiving trough 70; the cross beam 20 is arranged at the bottom of the sieve body 60 and is used to connect the under-sieve material receiving trough 70; the first air guide plate 30 is connected to the sieve body 60 and is located above the flow guide plate 10, and a first air inlet 300 is formed between the first air guide plate 30 and the flow guide plate 10; the second air guide plate 40 is connected above the cross beam 20 and is located below the flow guide plate 10, a maintenance window 100 is formed between the second air guide plate 40 and the flow guide plate 10, and a second air inlet 400 is formed between the second air guide plate 40 and the cross beam 20; the maintenance flap 50 is connected to the second air guide plate 40 and overlaps with the flow guide plate 10, and the maintenance flap 50 is used to cover the maintenance window 100.

[0025] It should be noted that in this embodiment, the deflector 10 is a single inclined plate or two relatively inclined plates. The lower end of the plate is provided with a screen undersize sorting mechanism 80. The screen undersize material falls from top to bottom onto the deflector 10 and is sorted by the screen undersize sorting mechanism 80 into different positions of the screen undersize receiving trough 70. The second air deflector 40 is located below the screen undersize sorting mechanism 80, so that the maintenance window 100 is aligned with the screen undersize sorting mechanism 80, facilitating the adjustment and maintenance of the screen undersize sorting mechanism 80 after the maintenance door 50 is opened. The cross beam 20 can serve as the bottom beam of the screen body 60 and at the same time as the installation foundation of the screen undersize receiving trough 70.

[0026] It should be explained that as Figure 2 shown, between the lower surface of the first air deflector 30 and the upper surface of the deflector 10 in this embodiment, an air inlet duct formed in an inverted V shape can be formed, and between the top surface of the cross beam 20 and the lower surface of the second air deflector 40, an air inlet duct formed in an inverted V shape can also be formed. Thus, the structural characteristics of the air inlet duct can be utilized to prevent the flour material in the screen body 60 from splashing outwards and leaking.

[0027] In this embodiment, the maintenance door 50 can be connected to the second air deflector 40 in a hinged manner. Considering that the inside of the screen body 60 is under negative pressure, on the side of the maintenance door 50 away from its hinge axis, it only needs to overlap on the deflector 10 to ensure a stable closed state. Specifically, the maintenance door 50 is made of a food-grade stainless steel plate to ensure hygiene.

[0028] Compared with the prior art, for the air inlet structure of the screen body 60 provided in this embodiment, a first air inlet 300 is formed between the first air deflector 30 and the deflector 10, and a second air inlet 400 is formed between the second air deflector 40 and the cross beam 20. Thus, the upper and lower two air inlets can be used to simultaneously supply air into the screen body 60, thereby improving the air inlet efficiency. The maintenance window 100 formed between the second air deflector 40 and the deflector 10 is covered by the maintenance door 50. This can not only adjust and maintain the screen undersize sorting mechanism 80 by opening the maintenance door 50, but also the closed maintenance door 50 can seal and block the maintenance window 100, thus preventing the material from leaking out through the maintenance window 100 under the disturbance of the screen undersize sorting mechanism 80, and at the same time preventing foreign objects from falling into the screen body 60 through the maintenance window 100 and causing pollution, thereby improving the material hygiene standard.

[0029] In some embodiments, referring to Figure 2 , the edge of the deflector 10 facing the outside of the screen body 60 is bent downward to form a reinforcing flange 11. The first air deflector 30 includes a first plate body 31 and a second plate body 32 arranged at an angle. Among them, the first plate body 31 is located outside the reinforcing flange 11 and forms the first air inlet 300 with the reinforcing flange 11, and the second plate body 32 extends obliquely downward directly above the reinforcing flange 11 to block the first air inlet 300.

[0030] The first plate body 31 and the second plate body 32 with an included angle form an inverted V-shaped structure. The reinforcing flange 11 outside the deflector 10 extends into the V-shaped space formed by the first plate body 31 and the second plate body 32 to form an inverted V-shaped air inlet passage. The function of this reinforcing flange 11 is, on the one hand, to improve the structural strength of the deflector 10, and on the other hand, to form a first air inlet 300 with the first plate body 31. After the outside air flow enters the first air inlet 300, it enters the inside of the sieve body 60 along the inverted V-shaped air inlet passage. Since the second plate body 32 extending obliquely downward blocks the first air inlet 300, it can prevent the materials falling from the deflector 10 from leaking out through the first air inlet 300.

[0031] As a specific structural form of the above cross beam 20, please refer to Figure 2 , the cross beam 20 includes an inner plate 21 and an outer plate 22; the lower end of the inner plate 21 is used to connect the undersize material receiving trough 70, and the upper end is inclined and bent outward of the sieve body 60 to form a material blocking surface 211; the upper end of the outer plate 22 is inclined and bent into the sieve body 60 to form a wind guiding surface 221 connected to the material blocking surface 211; wherein, a second air inlet 400 is formed between the second wind guiding plate 40 and the wind guiding surface 221.

[0032] A connecting flange can be provided at the lower end of the inner plate 21 to directly connect with the undersize material receiving trough 70. The upper end of the inner plate 21 forms an inclined material blocking surface 211. The material blocking surface 211 and the inclined wind guiding surface 221 at the top of the outer plate 22 are connected to form an inverted V-shaped corner structure. The inverted V-shaped corner part extends into the second wind guiding plate 40 to form an inverted V-shaped air inlet passage, so as to avoid the materials from splashing and leaking out while ensuring the smooth intake of air through this air inlet passage at the second air inlet 400.

[0033] As an optional structure of the above second wind guiding plate 40, please refer to Figure 2 , the second wind guiding plate 40 includes a third plate body 41 and a fourth plate body 42 that form an included angle when connected; a folded edge 411 bent inward of the sieve body 60 is provided at the lower end of the third plate body 41, and a second air inlet 400 is formed between the folded edge 411 and the wind guiding surface 221; the fourth plate body 42 is blocked directly above the material blocking surface 211. The third plate body 41 and the fourth plate body 42 are connected to form an angular space for the connecting part of the material blocking surface 211 and the wind guiding surface 221 to extend into, thereby forming an inverted V-shaped air inlet passage. At the same time, the fourth plate body 42 is used to block the material blocking surface 211, so as to reduce the probability of materials falling onto the material blocking surface 211, and further avoid the materials from leaking out through the second air inlet 400.

[0034] It should be noted that, as Figure 2As shown, the above-mentioned fourth plate body 42 extends obliquely downward from outside to inside, and the lower end of the fourth plate body 42 is bent vertically downward to form a baffle 421. The obliquely extending fourth plate body 42 can ensure that the materials falling on its upper surface can slide smoothly, and at the same time, the downwardly bent baffle 421 is used to block the above-mentioned inverted V-shaped air inlet passage, thereby preventing the falling materials from leaking out through the second air inlet 400.

[0035] In some possible implementation manners, please refer to Figure 2 , a plurality of support rods 212 are distributed at intervals on the material blocking surface 211, and each support rod 212 vertically passes through the fourth plate body 42 and is fixedly connected to the fourth plate body 42, and the top end of the support rod 212 passing through the fourth plate body 42 is used to connect the inspection flap 50. On the one hand, each support rod 212 can support the fourth plate body 42, thereby improving the connection stability of the second air guiding plate 40. On this basis, the top end of the support rod 212 extending above the fourth plate body 42 is used as the connection basis of the inspection flap 50, and the structure is simple and compact.

[0036] In some embodiments, the above-mentioned inspection flap 50 adopts the structure as shown in Figure 1 and Figure 2 . The inspection flap 50 includes a plurality of door panel units 51 distributed adjacent to each other in sequence. The lower ends of both sides of each door panel unit 51 are respectively hinged to the top ends of two adjacent support rods 212, and the upper end of the door panel unit 51 is movably connected to the air guiding plate 10. The corresponding door panel unit 51 can be separately opened according to the part to be repaired, and only a part of the inspection window 100 is exposed for maintenance operations. Compared with the way of opening the inspection window 100 integrally, the risk of foreign objects entering the inside of the sieve body 60 from the outside can be reduced, thereby ensuring the cleanliness inside the sieve body 60 and avoiding hygiene problems.

[0037] Specifically, referring to Figure 2 , in this embodiment, a retaining strip 12 is provided on the air guiding plate 10, and an inspection window 100 is formed between the connecting part of the third plate body 41 and the fourth plate body 42 and the retaining strip 12; the upper edge of the door panel unit 51 overlaps the retaining strip 12 so that the door panel unit 51 forms an inclined closed state. By providing the retaining strip 12 to support and limit the upper edge of the door panel unit 51, each door panel unit 51 can be made to form a stable inclined closed state overlapping on the retaining strip 12. On this basis, since the inside of the sieve body 60 is under negative pressure, the closing tightness of the door panel unit 51 can be ensured, and at the same time, it is convenient to open the door panel unit 51 to observe the material flow state inside the sieve body 60 and convenient to adjust the inspection and under-sieve material distribution mechanism 80; of course, considering further improving the closing tightness of the door panel unit 51, a magnetic part can be provided on the upper edge of the door panel unit 51 to adsorb the retaining strip 12.

[0038] It should be understood that, in this embodiment, as shown in Figure 2As shown in the figure, one side edge of the above-mentioned maintenance flap 50 close to the deflector 10 is continuously bent to form a side groove 52. By continuously folding twice to form the U-shaped side groove 52, on the one hand, it can improve the torsional stiffness of the maintenance flap 50 and avoid the deformation of the maintenance flap 50 affecting the closing tightness. On the other hand, it can facilitate the operator to buckle and pull the side groove 52 to operate the maintenance flap 50 for opening and closing, thus improving the convenience.

[0039] Based on the same inventive concept, in combination with Figures 1 to 3 it is understood that the embodiment of the present application further provides a purifier, including the above-mentioned air inlet structure of the sieve body 60.

[0040] Compared with the prior art, the purifier provided by the present utility model adopts the above-mentioned air inlet structure of the sieve body 60, and uses the upper and lower two air inlets to simultaneously supply air into the sieve body 60, thereby improving the air inlet efficiency; uses the maintenance flap 50 to cover the maintenance window 100 formed between the second air deflector 40 and the deflector 10, which can not only open the maintenance flap 50 to adjust and maintain the under-sieve material distribution mechanism 80, but also the closed maintenance flap 50 can seal and block the maintenance window 100, thereby avoiding the leakage of materials from the maintenance window 100 under the disturbance of the under-sieve material distribution mechanism 80, and at the same time can also prevent foreign substances from falling into the sieve body 60 through the maintenance window 100 and causing pollution, thereby improving the material hygiene standard.

[0041] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. The screen body air inlet structure is characterized by: include: The guide plate is connected to the inside of the screen body and is used to guide the undersize material to fall into the undersize material receiving trough; A crossbeam, arranged at the bottom of the screen body and used to connect the under-screen receiving trough; a first air guide plate, connected to the sieve body and located above the guide plate, wherein a first air inlet is formed between the first air guide plate and the guide plate; A second air guide plate, connected above the cross beam and located below the guide plate, an inspection window is formed between the second air guide plate and the guide plate, and a second air inlet is formed between the second air guide plate and the cross beam; An inspection valve is connected to the second air guide plate and overlapped with the air guide plate, and the inspection valve is used to cover the inspection window.

2. The sieve air inlet structure according to claim 1, characterized in that: The guide plate is bent downward toward the edge of the outer side of the screen body to form a reinforced flange; the first air guide plate includes a first plate body and a second plate body arranged at an angle; wherein the first plate body is located on the outer side of the reinforced flange and forms the first air inlet between the reinforced flange, and the second plate body extends downward at an angle directly above the reinforced flange to cover the first air inlet.

3. The sieve air inlet structure according to claim 1, characterized in that: The crossbeam includes an inner plate and an outer plate; the lower end of the inner plate is used to connect the under-screen material receiving trough, and the upper end is inclined and bent toward the outside of the screen body to form a material blocking surface; the upper end of the outer plate is inclined and bent toward the inside of the screen body to form an air guide surface connected to the material blocking surface; wherein the second air inlet is formed between the second air guide plate and the air guide surface.

4. The sieve air inlet structure according to claim 3, characterized in that: The second air guide plate includes a third plate body and a fourth plate body connected to form an angle; the lower end of the third plate body is provided with a folded edge bent toward the inner side of the sieve body, and the second air inlet is formed between the folded edge and the air guide surface; the fourth plate body blocks directly above the material blocking surface.

5. The sieve air inlet structure according to claim 4, characterized in that: The fourth plate body extends downwardly from the outside to the inside, and the lower end of the fourth plate body is bent vertically downward to form a retaining edge.

6. The sieve air inlet structure according to claim 4, characterized in that: A plurality of support rods are spaced apart on the material blocking surface, each of the support rods vertically passes through the fourth plate body and is fixedly connected to the fourth plate body, and the support rod passes through the top end of the fourth plate body for connecting to the inspection valve.

7. The sieve air inlet structure according to claim 6, characterized in that: The inspection valve comprises a plurality of door panel units which are sequentially distributed adjacent to each other. Both sides of the lower end of each door panel unit are respectively hinged to the top ends of two adjacent support rods, and the upper end of the door panel unit is movably connected to the guide plate.

8. The sieve air inlet structure according to claim 7, characterized in that: The guide plate is provided with a baffle, and the inspection window is formed between the connecting part of the third plate body and the fourth plate body and the baffle; the upper edge of the door panel unit overlaps the baffle to form the door panel unit in an inclined closed state.

9. The sieve air inlet structure according to any one of claims 1 to 8, characterized in that: The edge of one side of the inspection valve close to the guide plate is continuously bent to form a side groove.

10. A powder purifier, characterized in that: It comprises the screen body air inlet structure as described in any one of claims 1 to 9.

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