Screen box structure and square plansifter

Abstract

The utility model provides a screen box structure and a square plansifter, the screen box structure comprises a screen box body, the interior of the screen box body is divided into a plurality of screen bins; each screening bin comprises a first bin wall, a second bin wall, a third bin wall and an openable bin door; the first bin wall and the second bin wall are opposite and form a first screening way and a second screening way with the two opposite side walls of the screening lattice respectively. The third bin wall is opposite to the bin door and forms a third screening way with the side walls of the screening lattice. When the bin door is closed, acting force which abuts against the third bin wall in a sealed mode is applied to the screen lattices. First sealing strips are embedded in the positions, located on the two sides of the first screening way, of the first bin wall, second sealing strips are embedded in the positions, located on the two sides of the second screening way, of the second bin wall, and the first sealing strips and the second sealing strips abut against the two opposite side walls of the screening lattices in a sealed mode correspondingly. According to the sieve box structure and the square plansifter, the problem of powder channeling between sieve channels can be solved, and the mounting and sealing effects of the sieve lattices are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flour sieving, and particularly relates to a screen box structure and a high plansieve. Background Art

[0002] The high planing screen is mainly used for screening and grading wheat flour. It is structurally composed of a screen box, screen grids, a feed and discharge mechanism, and a transmission device with a weight block. The interior of the screen box is usually divided into two or more screen compartments, each of which is equipped with stacked screen grids to form multiple screening and discharge channels and screen paths. Different screen paths are used to output flour of different grades.

[0003] Currently, high planform screens typically use vertical wooden strips installed at the corners of the screen bin to position the screen grids. To ensure the tightness of each screen path, sealing cloth is wrapped around the wooden strips, creating a pressure seal between the cloth and the side walls of the screen grid. The drawbacks of this structure are that the wooden strips are easily deformed, affecting the installation and positioning accuracy of the screen grids, leading to powder leakage. Furthermore, the sealing cloth needs to completely wrap the wooden strips, resulting in high cloth consumption. Furthermore, the wooden strips themselves, as part of the screen path, have many blind spots, which can easily cause powder accumulation. Utility Model Content

[0004] The embodiments of the present invention provide a screen box structure and a high square plansieve, which aim to solve the problem of powder channeling between screen channels and improve the installation and sealing effect of the screen grid.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: first, a screen box structure is provided, including a screen box body, the screen box body is internally divided into multiple screen bins for stacking and arranging screen grids; each screen bin includes a first bin wall, a second bin wall, a third bin wall and an openable bin door; the first bin wall and the second bin wall are opposite to each other and form a first sieve path and a second sieve path between the two opposite side walls of the screen grid, and the third bin wall is opposite to the bin door and forms a third sieve path between the side wall of the screen grid facing away from the bin door; wherein, when the bin door is closed, it applies a force to the screen grid that is in sealing conflict with the third bin wall; the first bin wall is embedded with a first sealing strip at a position on both sides of the first sieve path, and the second bin wall is embedded with a second sealing strip at a position on both sides of the second sieve path, and the first sealing strip and the second sealing strip are respectively in sealing conflict with the two opposite side walls of the screen grid.

[0006] In combination with the first aspect, in a possible implementation, columns are provided at each corner position of the screen bin; wherein, a first thermal insulation board is provided between the two columns located on both sides of the first bin wall, and the two side edges of the first thermal insulation board respectively form a first vertical groove with the corresponding columns, and the first sealing strip is embedded in the first vertical groove; a second thermal insulation board is provided between the two columns located on both sides of the second bin wall, and the two side edges of the second thermal insulation board respectively form a second vertical groove with the corresponding columns, and the second sealing strip is embedded in the second vertical groove.

[0007] In some embodiments, the first insulation board and the second insulation board are arranged opposite to each other and have the same structure, wherein the first insulation board includes a first insulation core board and a first decorative panel; the first insulation core board is attached to the first bin wall, and the two ends are respectively bent toward the inside of the screen bin and attached to the side walls of the column; the first decorative panel is attached to the surface of the first insulation core board facing the inside of the screen bin, and forms a first sieve channel between the first decorative panel and the side walls of the sieve grid, and the two ends of the first decorative panel are respectively bent to form an edge, which is used to cover the bent end surface of the first insulation core board, and a first vertical groove is formed between the edge and the column.

[0008] Exemplarily, the edging includes an overlapping portion and an outward-turned portion, a first vertical groove is formed between the overlapping portion and the column, and the outward-turned portion is bent toward the outside of the first screen channel and abuts against the end surface of the first insulation core board.

[0009] For example, the bending portions at both ends of the first heat-insulating core board form first bending arc surfaces, and the first decorative board is conformably attached to the first bending arc surfaces.

[0010] In a possible implementation, bosses are provided on opposite side walls of the two uprights on both sides of the third bin wall, and the surfaces of the bosses facing the bin door are used to abut against the side wall of the sealing screen away from the bin door.

[0011] In some embodiments, a third heat insulation board is provided between the two bosses. The third heat insulation board is attached to the third bin wall and forms a third sieve channel between the third heat insulation board and the side wall of the sieve grid facing away from the bin door.

[0012] Exemplarily, the third insulation board includes a third insulation core board adhered to the third bin wall, and a third decorative plate adhered to the surface of the third insulation core board facing the inside of the screen bin; a third sieve channel is formed between the third decorative plate and the side wall of the sieve grid facing away from the bin door, and both ends of the third decorative plate are continuously bent to form folded edges, which are in contact with the boss and inserted between the table surface of the boss and the sieve grid.

[0013] For example, each bending portion of the third decorative plate forms a third bending arc surface.

[0014] The beneficial effect of the screen box structure provided by the utility model is that, compared with the prior art, the screen box structure of the utility model directly forms corresponding sieve channels between the respective bin walls of the screen bin and the corresponding side walls of the screen grid, and ensures the sealing of the first sieve channel and the second sieve channel by means of the first sealing strip embedded on the first bin wall and the second sealing strip embedded on the second bin wall which are in contact with the sieve grid, while at the same time, utilizing the pressing effect of the bin door sieve grid to make the sieve grid seal against the third bin wall to ensure the sealing of the third sieve channel, thereby not only improving the overall installation sealing effect of the sieve grid, but also eliminating the wooden strips in the sieve bin and reducing the consumption of sealing materials, thereby reducing costs and avoiding the problem of powder leakage between the respective sieve channels due to deformation of the wooden strips, and also avoiding the problem of powder accumulation caused by the dead corners of the wooden strips.

[0015] In a second aspect, an embodiment of the present invention further provides a high plansieve, comprising the above-mentioned screen box structure.

[0016] The beneficial effect of the high plan screen provided by the utility model is that, compared with the prior art, the high plan screen provided by the utility model adopts the above-mentioned screen box structure, which can not only improve the overall installation sealing effect of the screen grid, but also save the wooden strips in the screen bin and reduce the consumption of sealing materials, thereby reducing costs and avoiding the problem of powder leakage between the various screen channels due to the deformation of the wooden strips, and also avoiding the problem of powder accumulation caused by the dead corners of the wooden strips. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of the screen box structure (including the screen grid) provided in an embodiment of the present utility model;

[0018] Figure 2 A schematic diagram of the three-dimensional structure of the screen box structure (excluding the screen grid) provided in an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the screen bin in an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of the three-dimensional structure of the first heat insulation board used in an embodiment of the present utility model;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of the third heat insulation board used in the embodiment of the present utility model;

[0022] Figure 6 for Figure 3 Schematic diagram of the local enlarged structure at A in the middle;

[0023] Figure 7 for Figure 3 Schematic diagram of the local enlarged structure at B in the middle;

[0024] Figure 8 for Figure 4 Schematic diagram of the local enlarged structure at point C in the middle.

[0025] In the figure: 10, screen box body; 100, screen bin; 101, first bin wall; 1011, first screen path; 102, second bin wall; 1021, second screen path; 103, third bin wall; 1031, third screen path; 104, bin door; 11, first insulation board; 111, first insulation core board; 1111, first curved surface; 112, first decorative plate; 113, edging; 1131, overlapping part; 1132, outward turning part; 12, second insulation board; 13, third insulation board; 131, third insulation core board; 132, third decorative plate; 1321, folding edge; 1322, third curved surface; 14, boss; 20, screen grid; 30, first sealing strip; 40, second sealing strip; 50, column. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is 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 invention and are not intended to limit the present invention.

[0027] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 on this application. The terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0028] Please also refer to Figures 1 to 8The screen box structure provided by the present invention is now described. The screen box structure includes a screen box body 10, the interior of the screen box body 10 is divided into a plurality of screen bins 100 for stacking and arranging the screen grids 20; each screen bin 100 includes a first bin wall 101, a second bin wall 102, a third bin wall 103 and an openable bin door 104; the first bin wall 101 and the second bin wall 102 are opposite to each other and form a first sieve path 1011 and a second sieve path 1021 between the first bin wall 101 and the second bin wall 102 and the two opposite side walls of the screen grid 20, respectively; the third bin wall 103 is opposite to the bin door 104 and is open to the screen grid 20. A third sieve path 1031 is formed between the side walls of the grid 20 away from the warehouse door 104; wherein, when the warehouse door 104 is closed, a force is applied to the sieve grid 20 to seal and interfere with the third warehouse wall 103; the first warehouse wall 101 is located on both sides of the first sieve path 1011 and a first sealing strip 30 is embedded in the position of the second warehouse wall 101 on both sides of the second sieve path 1021, and the first sealing strip 30 and the second sealing strip 40 are respectively in sealing contact with the two opposite side walls of the sieve grid 20.

[0029] It should be explained that, in this embodiment, the connection method between the above-mentioned bin door 104 and the screen box body 10 can be a commonly used structure in which one side is connected by a hinge and the other side is locked by a lock handle, which will not be described in detail here.

[0030] In this embodiment, sheet metal parts used as the walls of the screen bin 100 are structurally improved. For example, a U-shaped surface or a curved surface is formed by the cooperation between the columns 50 and the box plates, so that the screen grid 20 can be installed and positioned without the help of wooden strips and a screen channel can be formed between the side walls of the screen grid 20. This can avoid the problem of powder leakage caused by deformation of the wooden strips. At the same time, since the wooden strip structure is omitted, the problem of powder accumulation caused by the dead corners of the wooden strips can also be solved.

[0031] In this embodiment, a groove structure can be provided on the first warehouse wall 101 and the second warehouse wall 102 for installing the sealing strip. The constraint of the groove can ensure the sealing reliability, and at the same time, it can also reduce the consumption of sealing materials and reduce costs; the third sieve channel 1031 is opposite to the warehouse door 104, and its sealing method can be based on the pressure of the warehouse door 104 on the screen grid 20 when it is closed, so that the side wall of the screen grid 20 away from the warehouse door 104 is in close contact with the part of the third warehouse wall 103 on both sides of the third sieve channel 1031 to form a seal. Furthermore, in order to improve the sealing effect of the third sieve channel 1031, a sealing felt strip can be adhered to the corresponding position where the third warehouse wall 103 contacts the screen grid 20.

[0032] Compared with the prior art, the screen box structure provided in this embodiment directly forms corresponding sieve channels between the respective bin walls of the sieve bin 100 and the corresponding side walls of the sieve grid 20, and ensures the sealing of the first sieve channel 1011 and the second sieve channel 1021 by means of the first sealing strip 30 embedded in the first bin wall 101 and the second sealing strip 40 embedded in the second bin wall 102 contacting the sieve grid 20. At the same time, the pressing action of the bin door 104 and the sieve grid 20 causes the sieve grid 20 to contact the third bin wall 103 in a sealed manner to ensure the sealing of the third sieve channel 1031. This not only improves the overall installation sealing effect of the sieve grid 20, but also eliminates the wooden strips in the sieve bin 100 and reduces the consumption of sealing materials, thereby reducing costs and avoiding the problem of powder leakage between the various sieve channels due to deformation of the wooden strips, and also avoiding the problem of powder accumulation caused by dead corners of the wooden strips.

[0033] In some embodiments, see Figure 3 , columns 50 are provided at each corner position of the screen bin 100; among them, a first heat insulation board 11 is provided between the two columns 50 on both sides of the first bin wall 101, and the two side edges of the first heat insulation board 11 form a first vertical groove with the corresponding columns 50, and the first sealing strip 30 is embedded in the first vertical groove; a second heat insulation board 12 is provided between the two columns 50 on both sides of the second bin wall 102, and the two side edges of the second heat insulation board 12 form a second vertical groove with the corresponding columns 50, and the second sealing strip 40 is embedded in the second vertical groove.

[0034] By arranging the first insulation board 11 and the second insulation board 12 between the columns 50, on the one hand, the insulation performance of the screen bin 100 is ensured, and on the other hand, a vertical groove structure for embedding the sealing strip is formed between the edge of the insulation board and the side wall of the column 50, thereby avoiding grooving on the column 50 or the insulation board body to increase manufacturing difficulty and cost, and at the same time, it can also ensure the structural integrity of the column 50 and the insulation board, thereby ensuring the structural strength of the screen bin 100 and avoiding the problem of powder leakage caused by deformation due to stress.

[0035] For details, please refer to Figures 3 to 8 The first insulation board 11 and the second insulation board 12 are arranged opposite to each other and have the same structure, wherein the first insulation board 11 includes a first insulation core board 111 and a first decorative board 112; the first insulation core board 111 is attached to the first warehouse wall 101, and the two ends are respectively bent toward the inside of the screen warehouse 100 and attached to the side wall of the column 50; the first decorative board 112 is attached to the surface of the first insulation core board 111 facing the inside of the screen warehouse 100, and forms a first screen channel 1011 between the side wall of the screen grid 20, and the two ends of the first decorative board 112 are respectively bent to form a edging 113, which is used to cover the bent end surface of the first insulation core board 111, and a first vertical groove is formed between the edging 113 and the column 50.

[0036] The first insulation board 11 and the second insulation board 12 are U-shaped components with grooves arranged relative to each other. Taking the first insulation board 11 as an example, it adopts a double-layer structure formed by bonding a first insulation core board 111 and a first decorative board 112. The first insulation core board 111 can be made of asbestos board or rock wool board, and the first decorative board 112 can preferably be made of food-grade stainless steel thin plate. The first insulation core board 111 is used to ensure the insulation effect. The first decorative board 112 can not only ensure the cleanliness of the first sieve channel 1011, but also can cover the end of the first insulation core board 111 through the edging 113 formed by the bent edge of the first decorative board 112, thereby ensuring that the surface in contact with the flour material is a clean surface and the product hygiene quality is guaranteed. On this basis, the bent edging 113 can improve the structural strength of the first decorative edge, so that the first vertical groove formed between the edging 113 and the side wall of the column 50 is used to embed the first sealing strip 30, which can avoid the deformation of the first vertical groove affecting the sealing effect of the first sealing strip 30.

[0037] For some possible implementations, see Figure 4 and Figure 8 The edge 113 includes an overlapping portion 1131 and an outward-turned portion 1132. A first vertical groove is formed between the overlapping portion 1131 and the column 50. The outward-turned portion 1132 is bent toward the outside of the first sieve path 1011 and abuts against the end face of the first insulating core panel 111. The edge of the first decorative panel 112 is bent in the opposite direction to form a partial overlap, and then bent toward the outside of the first sieve path 1011, thereby forming the overlapping portion 1131 and the outward-turned portion 1132. The overlapping portion 1131 can improve the structural strength of the edge 113, thereby ensuring the reliable installation of the first sealing strip 30 in the first vertical groove formed between the overlapping portion 1131 and the column 50. The outward-turned portion 1132 shields the end face of the first insulating core panel 111, thereby preventing flour materials from contacting the first insulating core panel 111 and affecting hygiene quality.

[0038] It should be noted that if Figure 4 、 Figure 6 and Figure 7 As shown, the bent portions at both ends of the first insulation core plate 111 form first curved surfaces 1111, and the first decorative plate 112 conforms to the first curved surfaces 1111. The bent portion of the first decorative plate 112 conforms to the first curved surfaces 1111 to avoid the problem of powder accumulation caused by the formation of a bending dead angle inside the first sieve path 1011, ensuring that the flour material entering the first sieve path 1011 can slide down along the surface of the first decorative plate 112, ensuring the smoothness of the material dropping from the first sieve path 1011.

[0039] It should be understood that the second sieve channel 1021 and the first sieve channel 1011 are symmetrical structures, so the second sieve channel 1021 has all the technical effects described above for the first sieve channel 1011, which will not be described in detail here.

[0040] In some embodiments, such as Figure 3 As shown, bosses 14 are provided on the opposite side walls of the two upright posts 50 on both sides of the third bin wall 103 . The surfaces of the bosses 14 facing the bin door 104 are used to abut against the side walls of the sealing screen 20 facing away from the bin door 104 .

[0041] The bosses 14 can be formed based on the structure of the column 50 itself, or by fixing an additional component, such as a flat tube, to the side wall of the column 50. When the screen grid 20 is installed, its side wall facing away from the door 104 abuts against the two bosses 14. Then, when the door 104 is closed, the pressure applied to the screen grid 20 causes the screen grid 20 to tightly abut against the surface of the bosses 14 facing the door 104, thereby sealing the third screen path 1031. Furthermore, a sealing felt strip can be attached to the surface of the bosses 14 facing the door 104 to further enhance the sealing effect of the third screen path 1031.

[0042] It should be understood that, in this embodiment, see Figure 3 、 Figure 6 and Figure 7 A third thermal insulation board 13 is disposed between the two bosses 14. The third thermal insulation board 13 is attached to the third bin wall 103 and forms a third sieve path 1031 with the side wall of the screen grid 20 facing away from the bin door 104. The third thermal insulation board 13 between the two bosses 14 provides thermal insulation protection for the third sieve path 1031. Furthermore, in conjunction with the first and second thermal insulation boards 11 and 12, the sieve bin 100 is thermally insulated on three sides, excluding the bin door 104. Furthermore, the bin door 104 can also be provided with an insulating interlayer to achieve comprehensive thermal insulation for the sieve bin 100.

[0043] For an example, see Figure 5 and Figure 6 The third insulation board 13 includes a third insulation core board 131 attached to the third warehouse wall 103, and a third decorative board 132 attached to the surface of the third insulation core board 131 facing the inside of the screen warehouse 100; a third sieve channel 1031 is formed between the third decorative board 132 and the side wall of the sieve grid 20 away from the warehouse door 104, and the two ends of the third decorative board 132 are continuously bent to form a folded edge 1321, and the folded edge 1321 is in contact with the boss 14 and inserted between the table surface of the boss 14 and the sieve grid 20.

[0044] Here, a tight fit and seal is achieved between the third warehouse wall 103 and the sieve grid 20 due to the pressure exerted by the warehouse door 104 on the sieve grid 20 (considering that the sieve grid 20 needs to be pulled out and disassembled, there is no tight pressure condition between the first and second warehouse walls 101, 102 and the sieve grid 20, which is why the first sealing strip 30 and the second sealing strip 40 are required). Therefore, there is no need to embed a sealing strip on the third warehouse wall 103. In this way, the structure of the third decorative plate 132 is simpler than that of the first decorative plate 112. The folded edge 1321 formed by continuous bending is directly used to form a fitting cover on the boss 14, thereby ensuring that the contact surface of the flour material falling into the third sieve channel 1031 is a clean surface (the third decorative plate 132 is made of food-grade stainless steel thin plate). In addition, in order to improve the structural strength of the third decorative surface, the folded edge 1321 is clamped between the table top of the boss 14 and the sieve grid 20, thereby avoiding the formation of a gap between the sieve grid 20 and the third decorative surface, which affects the sealing of the third sieve channel 1031.

[0045] It should be noted that if Figures 5 to 7 As shown, each bending portion of the third decorative plate 132 forms a third bending arc surface 1322. By providing the third bending arc surface 1322, the problem of powder accumulation caused by the presence of bending dead corners in the third sieve channel 1031 can be avoided, and the smoothness of the flour material falling in the third sieve channel 1031 can be improved.

[0046] On the basis of the above, it should be understood that eliminating the problem of powder accumulation by providing curved surfaces in the structure of each screen channel is also beneficial to reducing the frequency of shutdown and cleaning operations of the high planing screen, thereby helping to improve production efficiency.

[0047] Based on the same inventive concept, combined Figures 1 to 8 It is understood that the embodiment of the present application also provides a high square plansieve, the above-mentioned screen box structure.

[0048] Compared with the prior art, the high square plansieve provided by the utility model adopts the above-mentioned screen box structure, which not only improves the overall installation sealing effect of the screen grid 20, but also eliminates the wooden strips in the screen bin 100 and reduces the consumption of sealing materials, thereby reducing costs and avoiding the problem of powder leakage between the various screen channels due to the deformation of the wooden strips, and also avoids the problem of powder accumulation caused by the dead corners of the wooden strips.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Screen box structure, characterized in that, The screen box body comprises a screen box body, the interior of which is divided into a plurality of screen bins for stacking and arranging screen grids; each of the screen bins comprises a first bin wall, a second bin wall, a third bin wall and an openable bin door; the first bin wall and the second bin wall are opposite to each other and form a first sieve path and a second sieve path between the two opposite side walls of the screen grid, and the third bin wall is opposite to the bin door and forms a third sieve path between the side wall of the screen grid facing away from the bin door; wherein, when the bin door is closed, the screen grid is subjected to a force that seals against the third bin wall; the first bin wall is embedded with a first sealing strip at a position on both sides of the first sieve path, and the second bin wall is embedded with a second sealing strip at a position on both sides of the second sieve path, and the first sealing strip and the second sealing strip are respectively in sealing contact with the two opposite side walls of the screen grid.

2. The screen box structure according to claim 1, characterized in that: There are pillars at each corner of the screen bin; wherein, a first heat insulation board is provided between the two pillars located on both sides of the first bin wall, and the two side edges of the first heat insulation board respectively form a first vertical groove with the corresponding pillars, and the first sealing strip is embedded in the first vertical groove; a second heat insulation board is provided between the two pillars located on both sides of the second bin wall, and the two side edges of the second heat insulation board respectively form a second vertical groove with the corresponding pillars, and the second sealing strip is embedded in the second vertical groove.

3. The screen box structure according to claim 2, characterized in that: The first heat insulation board and the second heat insulation board are arranged opposite to each other and have the same structure, wherein the first heat insulation board comprises: A first heat-insulating core plate is attached to the first bin wall, with both ends of the first heat-insulating core plate being bent toward the inside of the screen bin and attached to the side walls of the pillars; The first decorative panel is attached to the surface of the first insulation core board facing the interior of the screen bin, and forms the first screen channel between the first decorative panel and the side wall of the screen grid. The two ends of the first decorative panel are bent to form a edging, and the edging is used to cover the bent end surface of the first insulation core board, and the first vertical groove is formed between the edging and the column.

4. The screen box structure according to claim 3, characterized in that: The edging includes an overlapping portion and an outward-turned portion, the first vertical groove is formed between the overlapping portion and the column, and the outward-turned portion is bent toward the outside of the first screen channel and abuts against the end surface of the first insulation core board.

5. The screen box structure according to claim 3, characterized in that: The bending parts at both ends of the first heat-insulating core board form first bending arc surfaces, and the first decorative board is conformally fitted to the first bending arc surfaces.

6. The screen box structure according to claim 2, characterized in that: Bosses are provided on the opposite side walls of the two uprights located on both sides of the third bin wall. The surfaces of the bosses facing the bin door are used to abut and seal the side walls of the sieve grid away from the bin door.

7. The screen box structure according to claim 6, characterized in that: A third heat insulation board is provided between the two bosses. The third heat insulation board is adhered to the third warehouse wall and forms the third sieve channel with the side wall of the sieve grid away from the warehouse door.

8. The screen box structure according to claim 7, characterized in that: The third insulation board includes a third insulation core board attached to the third bin wall, and a third decorative board attached to the surface of the third insulation core board facing the inside of the screen bin; the third sieve channel is formed between the third decorative board and the side wall of the sieve grid facing away from the bin door, and the two ends of the third decorative board are continuously bent to form folded edges, and the folded edges are in contact with the boss and inserted between the table surface of the boss and the sieve grid.

9. The screen box structure according to claim 8, characterized in that: Each bending portion of the third decorative plate forms a third bending arc surface.

10. High plan screen, characterized in that: The invention comprises the screen box structure according to any one of claims 1 to 9.

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