Screen box and vibration classifying screen

Abstract

The utility model provides a screen box and a vibration classifying screen, and belongs to the technical field of grain machinery, the screen box comprises a screen box body and a plurality of layers of screen frames distributed in the screen box body up and down at intervals, and each layer of screen frame is connected with a screen piece; a grain inlet box and a grain outlet box are arranged at the two ends of the screen box body respectively, and a box door capable of being opened is arranged on the side wall of the screen box body. The end, close to the grain inlet box or the grain outlet box, of the screen box body is connected with a tensioning assembly. The tensioning assembly is provided with a first hook plate. A second hook plate is arranged at the end, away from the tensioning assembly, of the screen frame, one end of the screen piece is in hanging fit with the first hook plate, and the other end of the screen piece is in hanging fit with the second hook plate. According to the screen box and the vibration classifying screen, the grain inlet box and the grain outlet box do not need to be detached when the screen pieces are replaced, the screen frames do not need to be detached either, the screen pieces can be detached and replaced independently, replacement convenience and efficiency of the screen pieces can be improved, the number of standby screen frames can be greatly reduced compared with the mode that the screen pieces and the screen frames are integrally detached and replaced, and cost is reduced. And cost control is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of grain machinery technology, specifically relating to a sieve box and a vibrating grading sieve. Background Technology

[0002] Vibrating grading screens can precisely grade grains such as rice and wheat according to particle size. Through the screening action of the vibrating screen, smaller particles fall through the screen holes, while larger particles remain on the screen surface, thus achieving separation of different grades. Structurally, vibrating grading screens typically have multiple layers of screens with gradually decreasing screen size from top to bottom inside the screen box. Replacement is required for different grading requirements and for screens that are clogged or damaged. Existing vibrating grading screens require the removal of the feed box or discharge box when replacing the screens, and then the screens are pulled out from the feed end or discharge end of the screen box. Moreover, the screen frame and screen plates are usually an integrated structure, requiring complete replacement, which is not only time-consuming and labor-intensive, but also detrimental to cost control. Utility Model Content

[0003] This utility model provides a screen box and a vibrating grading screen, which aims to improve the convenience of screen plate replacement and promote cost control.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: Firstly, a sieve box is provided, comprising a sieve box body and multiple layers of sieve frames spaced vertically within the sieve box body, each layer of sieve frames being connected to a sieve plate; a grain inlet box and a grain outlet box are respectively provided at both ends of the sieve box body, and an openable box door is provided on the side wall of the sieve box body; a tensioning component is connected to one end of the sieve box body near the grain inlet box or the grain outlet box, and the tensioning component is provided with a first hook plate; a second hook plate is provided at one end of the sieve frame away from the tensioning component, and one end of the sieve plate is hooked and cooperated with the first hook plate, and the other end is hooked and cooperated with the second hook plate.

[0005] In conjunction with the first aspect, in one possible implementation, the end of the screen frame closer to the grain inlet is higher than the other end, and the screen frame has an upwardly arched arc-shaped support surface, with the screen plates conforming to the arc-shaped support surface based on the tension force applied by the tensioning assembly.

[0006] In some embodiments, a plurality of first insertion portions are spaced apart on the frame of the sieve facing the door, and a plurality of second insertion portions are provided on the frame of the door; wherein, when the door is closed, each second insertion portion is inserted into each of the first insertion portions.

[0007] In some embodiments, the tensioning assembly is connected to the end of the screen box body near the grain inlet, and the edge of the first hook plate away from the second hook plate is provided with a sealing fold, and a sealing strip is connected to the sealing fold, the sealing strip abutting against the inner wall of the screen box body.

[0008] For example, the two ends of the sieve plate are respectively connected to a first hanging plate and a second hanging plate; the first hanging plate is engaged with the first hook plate, and the second hanging plate is engaged with the second hook plate.

[0009] For example, both the first and second hanging plates are double-layered folded plates made of metal sheets. The folded ends of the double-layered folded plates are bent to form hook structures for hanging the first or second hook plate. The end of the sieve plate is inserted between the layers of the double-layered folded plates and fixed by fasteners.

[0010] In conjunction with the first aspect, in one possible implementation, the tensioning assembly includes a fixed pull rod, a pull frame, and a tensioning handle; one end of the fixed pull rod extends into the interior of the screen box body and is connected to a first hook plate, the pull frame is connected to the other end of the fixed pull rod, and the tensioning handle is connected to the outer wall of the screen box body and is connected to the pull frame.

[0011] In some embodiments, the tensioning handle has a tensioning rod that extends into the pull frame. A baffle is connected to the end of the tensioning rod that extends into the pull frame. An elastic element is sleeved on the tensioning rod. One end of the elastic element abuts against the baffle, and the other end abuts against the inner wall of the pull frame away from the first hook plate. An adjusting nut is threaded onto the tensioning rod. The adjusting nut abuts against the outer wall of the pull frame away from the first hook plate.

[0012] For example, a partition is provided in the middle of the screen box body, which divides the interior of the screen box body into two screen chambers. Both screen chambers are connected to the grain inlet box and the grain outlet box, and multiple layers of screen frames are distributed vertically in both screen chambers.

[0013] The beneficial effects of the sieve box provided by this utility model are as follows: Compared with the prior art, in this sieve box, grain enters the top sieve plate from the grain inlet box, and is sieved layer by layer with the vibration of the sieve box body, and finally enters the grain outlet box and is discharged through different grain outlet channels, thereby achieving grain grading according to particle size; when it is necessary to replace the sieve plate, simply open the box door located on the side of the sieve box body, and then loosen the tensioning component to release the first hook plate and the second hook plate from the two ends of the sieve plate, so that the sieve plate can be taken out through the opened box door. Then, the two ends of the sieve plate to be replaced are hooked to the first hook plate and the second hook plate, and the tensioning component is used to reapply tension to complete the replacement of the sieve plate; the entire replacement process does not require disassembling the grain inlet box and the grain outlet box, nor does it require disassembling the sieve frame, which can realize the individual replacement of the sieve plate. This not only improves the convenience and efficiency of sieve plate replacement, but also greatly reduces the number of spare sieve frames compared with the method of disassembling and replacing the sieve plate and the sieve frame as a whole, which is conducive to cost control.

[0014] Secondly, this utility model embodiment also provides a vibrating grading screen, including the screen box described above.

[0015] The beneficial effects of the vibrating grading screen provided by this utility model are as follows: Compared with the prior art, the vibrating grading screen of this utility model adopts the above-mentioned screen box. When it is necessary to replace the screen plate, simply open the box door located on the side of the screen box body, and then loosen the tensioning component to loosen the first hook plate and the second hook plate from the two ends of the screen plate. The screen plate can then be taken out through the opened box door. Then, the two ends of the screen plate to be replaced are hooked to the first hook plate and the second hook plate, and the tensioning component is used to reapply tension to complete the replacement of the screen plate. The entire replacement process does not require disassembling the grain inlet box and the grain outlet box, nor does it require disassembling the screen frame. It can realize the individual replacement of the screen plate, which not only improves the convenience and efficiency of screen plate replacement, but also greatly reduces the number of spare screen frames compared with the method of disassembling and replacing the screen plate and the screen frame as a whole, which is conducive to cost control. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of the sieve box provided in an embodiment of this utility model;

[0017] Figure 2 For along Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0018] Figure 3 for Figure 2 A magnified view of the structure at point B in the middle;

[0019] Figure 4 for Figure 2 A magnified schematic diagram of the local structure at point C;

[0020] Figure 5 This is a three-dimensional structural diagram of the sieve frame used in the embodiments of this utility model;

[0021] Figure 6 A schematic diagram of the cross-sectional structure of the sieve box provided in an embodiment of this utility model;

[0022] Figure 7 This is a three-dimensional structural diagram of the sieve (partial) used in an embodiment of the present utility model;

[0023] Figure 8 This is a three-dimensional structural diagram of the tensioning handle used in the embodiment of this utility model;

[0024] Figure 9 This is a schematic diagram of the structure of the sieve box provided in an embodiment of the present invention when some of the box doors are open;

[0025] Figure 10 for Figure 9 A magnified schematic diagram of the structure at point D.

[0026] In the diagram: 10. Screen box body; 11. Partition plate; 12. Screen cavity; 20. Screen frame; 21. Second hook plate; 22. First insertion part; 30. Screen plate; 31. First hanging plate; 32. Second hanging plate; 40. Grain inlet box; 50. Grain outlet box; 60. Box door; 61. Second insertion part; 70. Tensioning assembly; 71. First hook plate; 711. Sealing fold; 712. Sealing strip; 72. Fixed pull rod; 73. Pull frame; 74. Tensioning handle; 741. Tensioning pull rod; 742. Baffle plate; 743. Elastic element; 744. Adjusting nut. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0028] It should be noted that when an element is referred to as being "set on" or "connected to" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0029] Please refer to the following: Figures 1 to 10 The sieve box provided by this utility model will now be described. The sieve box includes a sieve box body 10 and multiple layers of sieve frames 20 spaced vertically within the sieve box body 10. Each layer of sieve frame 20 is connected to a sieve plate 30. The two ends of the sieve box body 10 are respectively provided with a grain inlet box 40 and a grain outlet box 50. The side wall of the sieve box body 10 is provided with an openable box door 60. A tensioning component 70 is connected to one end of the sieve box body 10 near the grain inlet box 40 or the grain outlet box 50. The tensioning component 70 is provided with a first hook plate 71. The end of the sieve frame 20 away from the tensioning component 70 is provided with a second hook plate 21. One end of the sieve plate 30 is hooked and engaged with the first hook plate 71, and the other end is hooked and engaged with the second hook plate 21.

[0030] It is important to understand that the working principle of the vibrating grading screen is as follows: the grain to be screened enters the grain inlet 40 and enters the screen plate 30 installed on the top screen frame 20. Grain particles smaller than the screen holes of the top screen plate 30 fall to the next screen plate 30, while the rest enter the grain outlet 50 along the top screen plate 30. The next screen plate 30 then separates the oversize and undersize materials based on the size of its screen holes, and so on until the bottom screen plate 30 (usually a smooth panel without holes). The grain outlet 50 is equipped with a grain outlet channel corresponding to each screen plate 30, thereby realizing the graded discharge of grain.

[0031] In this embodiment, the tensioning assembly 70 can be directly installed on the wall of the screen box body 10, or it can be indirectly fixed to the screen box body 10 or the frame through a mounting bracket; specifically, the tensioning assembly 70 can be multiple screws connected to the first hook plate 71, with each screw passing through the box wall and connected to a nut for tensioning, or it can be a... Figure 8 The push-pull quick clamp shown is connected to the first hook plate 71. By pushing and pulling its handle, the tension or relaxation of the screen plate 30 can be achieved.

[0032] It should be noted that in this embodiment, both the first hook plate 71 and the second hook plate 21 can form hook grooves extending along the width direction of the screen box body 10 (the grain inlet box 40 and the grain outlet box 50 are located at the two ends of the length direction of the screen box body 10, respectively) by utilizing their respective bending parts. The two ends of the screen plate 30 respectively adopt a structure opposite to the bending direction of the first hook plate 71 and the second hook plate 21 to form hanging grooves. When the tensioning component 70 is in a relaxed state, the hanging grooves at both ends of the screen plate 30 can be inserted into the hook grooves of the first hook plate 71 and the second hook plate 21 along the width direction of the screen box body 10. That is to say, after opening the box door 60 and loosening the tensioning component 70, the screen plate 30 can be disassembled and installed by pulling, thereby improving the convenience of operation. After the screen plate 30 is inserted into the first hook plate 71 and the second hook plate 21, the tensioning component 70 applies a tensioning force to the screen plate 30, thereby making the screen plate 30 taut and attached to the screen frame 20.

[0033] Compared with the prior art, the sieve box provided in this embodiment allows grain to enter the top sieve plate 30 from the grain inlet box 40, and be sieved layer by layer with the vibration of the sieve box body 10, and finally enter the grain outlet box 50 and be discharged through different grain outlet channels, thereby achieving grain grading according to particle size. When it is necessary to replace the sieve plate 30, simply open the box door 60 located on the side of the sieve box body 10, and then loosen the tensioning component 70 to loosen the first hook plate 71 and the second hook plate 21 from the two ends of the sieve plate 30, so that the sieve plate 30 can be removed by the open box door 60. Remove the sieve plate 30, then hook both ends of the sieve plate 30 to be replaced onto the first hook plate 71 and the second hook plate 21, and then reapply tension using the tensioning component 70 to complete the replacement of the sieve plate 30. The entire replacement process does not require disassembling the grain inlet box 40 and the grain outlet box 50, nor does it require disassembling the sieve frame 20. It can realize the individual replacement of the sieve plate 30, which not only improves the convenience and efficiency of replacing the sieve plate 30, but also greatly reduces the number of spare sieve frames 20 compared to the method of disassembling and replacing the sieve plate 30 and the sieve frame 20 as a whole, which is beneficial to cost control.

[0034] In some embodiments, see Figure 2 and Figure 5 The end of the screen frame 20 closest to the grain inlet 40 is higher than the other end, and the screen frame 20 has an upwardly arched arc-shaped support surface. The screen plate 30 is attached to the arc-shaped support surface based on the tension force applied by the tensioning assembly 70.

[0035] Setting a height difference between the two ends of the screen frame 20 allows the grain to flow in a high-in, low-out pattern on the screen plate 30, which is beneficial to improving screening efficiency. On this basis, the upward arch in the middle of the screen frame 20 allows the first half of it, which is close to the grain inlet box 40, to have a smaller slope, which can be used as a gentle screening section. The slope of the second half gradually increases to form a rapid screening section. Since the grain is large and thick in the first half of the screen plate 30, the gentle screening section can slow down the grain flow speed, so that the large and thick grain layer in this area can be fully screened. As the screening process progresses, the grain layer gradually thins and enters the rapid screening section. In the rapid screening section, because the grain layer is thinner, the flow speed of the grain layer on the surface of the screen plate 30 can be increased while ensuring sufficient screening. This allows the grain falling onto the next layer of screen plate 30 to be evenly spread, avoiding the situation where the grain on the lower layers of screen plate 30 is distributed closer to the grain outlet box 50. This makes full use of the area of ​​the screen plate 30 to improve screening efficiency and quality.

[0036] In addition, setting the screen frame 20 as an upwardly curved arch structure can form an arc-shaped support surface on its upper surface. In this way, by applying tension to the screen plate 30 through the tensioning component 70, the screen plate 30 can be kept in close contact with the arc-shaped support surface, thereby improving the connection reliability of the screen plate 30 on the screen frame 20 and avoiding the screen plate 30 from fluctuating up and down relative to the screen frame 20 during the vibration of the screen box body 10, which would affect the stability of the screening operation.

[0037] It should be noted that you should refer to [link / reference]. Figure 9 and Figure 10 In some embodiments, the sieve frame 20 is provided with a plurality of first plug-in portions 22 at intervals on the side of the frame facing the door 60, and the frame of the door 60 is provided with a plurality of second plug-in portions 61; wherein, when the door 60 is closed, each second plug-in portion 61 is plugged into each first plug-in portion 22.

[0038] Since the stability of the screen frame 20 connection is directly related to whether it vibrates during the vibration of the screen box body 10, this embodiment takes into account the side-opening structure of the door 60. Therefore, a first insertion part 22 is provided on the frame of the screen frame 20 facing the door 60, and a second insertion part 61 is provided on the frame position of the door 60 corresponding to each of the first insertion parts 22. When the door 60 is closed, the second insertion part 61 is inserted into the first insertion part 22, thereby fixing the side of the screen frame 20 and preventing the screen frame 20 from vibrating during the vibration of the screen box body 10, which would affect the stability of the screening operation and the screening effect.

[0039] Specifically, such as Figure 10 As shown, the first insertion part 22 is a wedge-shaped insertion connector, and the second insertion part 61 is a wedge-shaped insertion hole; or, the first insertion part 22 is a wedge-shaped insertion hole, and the second insertion part 61 is a wedge-shaped insertion connector. This wedge-shaped insertion connector and wedge-shaped insertion hole ensure reliable connection between the first insertion part 22 and the second insertion part 61 during the closing of the box door 60, and the second insertion part 61 automatically disengages from the first insertion part 22 as the box door 60 opens, thus ensuring smooth opening and closing of the box door 60. Furthermore, the wedge-shaped insertion structure eliminates gaps and improves the tightness of the connection, thereby preventing vibration of the screen frame 20 during the vibration of the screen box body 10, which would affect the stability of the screening operation and the screening effect.

[0040] It should also be noted that, in this embodiment, the doors 60 on both sides of the screen box body 10 can be either integral door panels or a combination door structure with multiple doors 60 arranged together. Considering the large side area of ​​the screen box body 10, the latter is preferred. Figure 1 and Figure 9 Based on the combined door structure shown, since both ends of the screen frame 20 have connecting structures, the second insertion part 61 can be provided only for the middle door 60, and the first insertion part 22 can be provided in the middle of the frame of the screen frame 20 in response to the second insertion part 61. Of course, in order to ensure the fixing strength of the screen frame 20, the second insertion part 61 can also be provided on each door 60, and the number of first insertion parts 22 on the screen frame 20 can be increased accordingly.

[0041] As one specific embodiment of the tensioning component 70 described above, please refer to Figures 2 to 4 The tensioning component 70 is connected to the end of the screen box body 10 near the grain inlet box 40. The first hook plate 71 has a sealing fold 711 at the edge away from the second hook plate 21. A sealing strip 712 is connected to the sealing fold 711 and abuts against the inner wall of the screen box body 10.

[0042] Considering that the grain inlet box 40 only needs to feed material onto the uppermost screen plate 30, there is a large space below the grain inlet box 40 to arrange the tensioning component 70. In addition, considering that each screen plate 30 needs to be connected to the grain outlet box 50 at the discharge end, setting the tensioning component 70 would easily affect the smoothness of discharge. Therefore, in this embodiment, the tensioning component 70 is set at the end of the screen box close to the grain inlet box 40. On this basis, in order to improve the sealing between the upper and lower screen layers, a sealing fold 711 is set on the edge of the first hook plate 71, and a sealing strip 712 is glued on the sealing fold 711. The sealing strip 712 is used to seal the gap between the sealing fold 711 and the inner wall of the screen box body 10, thereby preventing the grain from falling into the next screen layer through the gap and affecting the screening quality.

[0043] For a specific structural form of the aforementioned sieve plate 30, please refer to [link / reference]. Figure 3 and Figure 4 The screen plate 30 has a first hanging plate 31 and a second hanging plate 32 connected to its two ends respectively. The first hanging plate 31 is engaged with the first hook plate 71, and the second hanging plate 32 is engaged with the second hook plate 21. Here, the bending directions of the first hanging plate 31 and the first hook plate 71 are opposite, and the bending directions of the second hanging plate 32 and the second hook plate 21 are opposite. Thus, the screen plate 30 can be installed by hooking the first hanging plate 31 to the first hook plate 71 and the second hanging plate 32 to the second hook plate 21. Specifically, the first hook plate 71 and the second hook plate 21 respectively form hook grooves facing outwards from both ends of the screen box body 10, and the first hanging plate 31 and the second hanging plate 32 respectively form hanging grooves opposite to the hook grooves. Based on this structure, the screen plate 30 can be understood as a sliding insert into the first hook plate 71 in the width direction of the screen box body 10. The screen plate 30 is installed on the first hook plate 71 and the second hook plate 21. From the length direction of the screen box body 10, the screen plate 30 is installed by the hooking and cooperation of the first hook plate 71 and the first hanging plate 31, and the hooking and cooperation of the second hook plate 21 and the second hanging plate 32. When assembling or disassembling the screen plate 30, the first hanging plate 31 can be inserted or pulled out of the first hook plate 71 and the second hanging plate 32 can be inserted or pulled out of the second hook plate 21 by pulling the screen plate 30 along the width direction of the screen box body 10. After the first hanging plate 31 and the second hanging plate 32 are inserted into place, the screen plate 30 can be tightened by the tensioning component 70. The operation is simple and convenient.

[0044] Among some possible implementations, combining Figure 3 , Figure 4 and Figure 7It is understood that the first hanging plate 31 and the second hanging plate 32 are both double-layered folded plates made of metal sheets. The folded ends of the double-layered folded plates are bent to form a hook structure for hanging the first hook plate 71 or the second hook plate 21. The end of the sieve plate 30 is inserted into the interlayer of the double-layered folded plates and fixed by fasteners.

[0045] A metal sheet is folded along its centerline to form a double-layer folded plate. The folded ends are then bent to form a hook structure. The ends of the double-layer folded plate and the hook structure can be clamped on the upper and lower sides of the end of the sieve plate 30. Fasteners such as screws or rivets are then inserted through the overlapping part of the sieve plate 30 and the double-layer folded plate to fix them together. This can improve the structural strength and tensile strength of the first hanging plate 31 and the second hanging plate 32, and also improve the reliability of the connection between the first hanging plate 31, the second hanging plate 32 and the sieve plate 30.

[0046] In some embodiments, the tensioning assembly 70 described above employs, for example... Figure 3 The structure shown is as follows. The tensioning assembly 70 includes a fixed pull rod 72, a pull frame 73, and a tensioning handle 74; one end of the fixed pull rod 72 extends into the screen box body 10 and is connected to the first hook plate 71, the pull frame 73 is connected to the other end of the fixed pull rod 72, and the tensioning handle 74 is connected to the outer wall of the screen box body 10 and is connected to the pull frame 73.

[0047] The tensioning handle 74 can be specifically structured as follows: Figure 8 The push-pull quick clamp shown has the same or similar structure. By operating the tensioning handle 74, tension can be applied to the pull frame 73. Then the pull frame 73 transmits the tension to the fixed pull rod 72, thereby causing the first hook plate 71 connected to the fixed pull rod 72 to apply tension to the screen plate 30. The structure is simple and the operation is convenient.

[0048] Specifically, please refer to Figure 3 and Figure 8 In this embodiment, the tensioning handle 74 has a tensioning rod 741 that passes through the inside of the pull frame 73. The end of the tensioning rod 741 that passes through the inside of the pull frame 73 is connected to a baffle 742. An elastic element 743 is sleeved on the tensioning rod 741. One end of the elastic element 743 abuts against the baffle 742, and the other end abuts against the inner wall of the pull frame 73 away from the first hook plate 71.

[0049] Here, the tensioning rod 741 is inserted into the pull frame 73 and the elastic element 743, such as a spring, is spaced and sleeved on it based on the baffle 742. This allows the tensioning rod 741 to generate an elastic tension force on the pull frame 73, thereby eliminating the engagement gap between the screen plate 30 and the first hook plate 71 and the second hook plate 21 by utilizing the elastic force, and improving the connection stability of the screen plate 30.

[0050] To meet the adjustment requirements of the tension of the 30 sieve sheets, such as Figure 3As shown, an adjusting nut 744 is threaded onto the tensioning rod 741, and the adjusting nut 744 abuts against the outer wall of the pull frame 73 away from the first hook plate 71. By turning the adjusting nut 744, the length of the tensioning rod 741 extending into the pull frame 73 can be adjusted, thereby adjusting the tensioning amplitude of the tensioning handle 74 on the first hook plate 71 through the pull frame 73 and the fixed rod 72, thus realizing the adjustment of the tension of the screen plate 30.

[0051] It should be noted that you should refer to [link / reference]. Figure 6 The screen box body 10 has a partition 11 in the middle, which divides the interior of the screen box body 10 into two screen chambers 12. Both screen chambers 12 are connected to the grain inlet box 40 and the grain outlet box 50, and multiple layers of screen frames 20 are distributed vertically and vertically within each screen chamber 12. Based on the two screen chambers 12, the screen box body 10 has openable doors 60 on both sides of its box walls, which facilitates the replacement of the screen plates 30 in the two screen chambers 12.

[0052] Based on the same inventive concept, combined with Figures 1 to 10 It is understood that this application also provides a vibrating grading screen, including the screen box described above.

[0053] Compared with the prior art, the vibrating grading screen provided in this embodiment adopts the above-mentioned screen box. When the screen plate 30 needs to be replaced, simply open the box door 60 located on the side of the screen box body 10, and then loosen the tensioning component 70 to loosen the first hook plate 71 and the second hook plate 21 from the two ends of the screen plate 30. The screen plate 30 can then be taken out through the opened box door 60. After that, the two ends of the screen plate 30 to be replaced are hooked to the first hook plate 71 and the second hook plate 21, and the tensioning component 70 is used to reapply tension to complete the replacement of the screen plate 30. The entire replacement process does not require disassembling the grain inlet box 40 and the grain outlet box 50, nor does it require disassembling the screen frame 20. It can realize the individual replacement of the screen plate 30, which not only improves the convenience and efficiency of screen plate 30 replacement, but also greatly reduces the number of spare screen frames 20 compared with the method of disassembling and replacing the screen plate 30 and the screen frame 20 as a whole, which is beneficial to cost control.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sieve box, characterized in that, The sieve box includes a sieve box body (10) and multiple sieve frames (20) spaced vertically within the sieve box body (10). Each sieve frame (20) is connected to a sieve plate (30). The two ends of the sieve box body (10) are respectively provided with a grain inlet box (40) and a grain outlet box (50). The side wall of the sieve box body (10) is provided with an openable door (60). A tensioning component (70) is connected to one end of the sieve box body (10) near the grain inlet box (40) or the grain outlet box (50). The tensioning component (70) is provided with a first hook plate (71). A second hook plate (21) is provided at one end of the sieve frame (20) away from the tensioning component (70). One end of the sieve plate (30) is hooked to the first hook plate (71), and the other end is hooked to the second hook plate (21).

2. The sieve box as described in claim 1, characterized in that, The end of the sieve frame (20) near the grain inlet box (40) is higher than the other end, and the sieve frame (20) has an upwardly arched arc-shaped support surface, and the sieve plate (30) is attached to the arc-shaped support surface based on the tension force applied by the tensioning assembly (70).

3. The sieve box as described in claim 1, characterized in that, The sieve frame (20) has a plurality of first plug-in parts (22) spaced apart on the side of the frame facing the box door (60), and the frame of the box door (60) has a plurality of second plug-in parts (61); wherein, when the box door (60) is closed, each of the second plug-in parts (61) is plugged into each of the first plug-in parts (22).

4. The sieve box as described in claim 1, characterized in that, The tensioning assembly (70) is connected to one end of the screen box body (10) near the grain inlet box (40). The first hook plate (71) has a sealing flange (711) on its edge away from the second hook plate (21). A sealing strip (712) is connected to the sealing flange (711), and the sealing strip (712) abuts against the inner wall of the screen box body (10).

5. The sieve box as described in claim 1, characterized in that, The two ends of the sieve plate (30) are respectively connected to a first hanging plate (31) and a second hanging plate (32); the first hanging plate (31) is hooked to the first hook plate (71), and the second hanging plate (32) is hooked to the second hook plate (21).

6. The sieve box as described in claim 5, characterized in that, The first hanging plate (31) and the second hanging plate (32) are both double-layered folded plates made of metal sheets. The folded ends of the double-layered folded plates are bent to form hook structures for hanging the first hook plate (71) or the second hook plate (21). The end of the sieve plate (30) is inserted between the layers of the double-layered folded plates and fixed by fasteners.

7. The sieve box as described in claim 1, characterized in that, The tensioning assembly (70) includes a fixed pull rod (72), a pull frame (73), and a tensioning handle (74); one end of the fixed pull rod (72) extends into the inside of the screen box body (10) and is connected to the first hook plate (71); the pull frame (73) is connected to the other end of the fixed pull rod (72); and the tensioning handle (74) is connected to the outer wall of the screen box body (10) and is connected to the pull frame (73).

8. The sieve box as described in claim 7, characterized in that, The tensioning handle (74) has a tensioning rod (741) that passes through the inside of the pull frame (73). The end of the tensioning rod (741) that passes through the inside of the pull frame (73) is connected to a baffle (742). An elastic element (743) is sleeved on the tensioning rod (741). One end of the elastic element (743) abuts against the baffle (742), and the other end abuts against the inner wall of the pull frame (73) away from the first hook plate (71). An adjusting nut (744) is threaded onto the tensioning rod (741), and the adjusting nut (744) abuts against the outer wall of the pull frame (73) away from the first hook plate (71).

9. The sieve box according to any one of claims 1-8, characterized in that, The screen box body (10) is provided with a partition (11) in the middle. The partition (11) divides the interior of the screen box body (10) into two screen chambers (12). Both screen chambers (12) are connected to the grain inlet box (40) and the grain outlet box (50). Multiple layers of screen frames (20) are distributed vertically and vertically in both screen chambers (12).

10. A vibrating grading screen, characterized in that, Includes the sieve box as described in any one of claims 1-9.

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