A multi-stage ore screening device

Abstract

The present invention relates to the field of screening, and specifically provides a multi-stage ore screening device, which aims to solve the problem of reduced filtering efficiency and poor screening effect caused by filter blockage in current ore screening devices. The multi-stage ore screening device of the present invention includes a device housing and a reset component, a bending component, and a first filter plate group and a second filter plate group arranged up and down connected to the device housing. The device housing is formed with a feed chamber and a plurality of screening chambers connected to the feed chamber. The reset component can provide a pulling force to straighten the first filter plate group and the second filter plate group. The first filter plate group and the second filter plate group are provided with a bending component on their sides. The bending component can overcome the pulling force provided by the reset component to the first filter plate group or the second filter plate group and fold the two adjacent first filter plates or the second filter plates to one side, so as to clean the filter plates by beating and vibrating, avoid clogging the filter holes with ores, and ensure the screening effect.

Description

Technical Field

[0001] The invention relates to the technical field of ore screening devices, in particular to a multi-stage ore screening device. Background Art

[0002] Ore screening devices play a vital role in the mineral processing system. Ore screening devices are mainly used to separate solid particles of different particle sizes, ensuring the production efficiency of the crusher, preventing the ore from being over-crushed, and optimizing the processing capacity of subsequent processes to effectively improve the efficiency of mineral processing.

[0003] The ore multi-stage screening device in the prior art often has the problem of reduced filtration efficiency due to filter blockage. In addition, the filter blockage will also cause the problem that some large-particle ores and small-particle ores cannot be separated, thereby affecting the processing efficiency of the ore.

[0004] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] Based on this, it is necessary to provide a multi-stage ore screening device to address the problems of reduced filtration efficiency and poor screening effect caused by filter blockage in current ore screening devices.

[0006] The above purpose is achieved through the following technical solutions:

[0007] The multi-stage ore screening device provided by the present invention comprises a device shell and a first filter plate group, a second filter plate group, a reset component and a bending component connected to the device shell, the device shell is formed with a feed chamber, a first screening chamber, a second screening chamber and a third screening chamber, the feed chamber is located above the second screening chamber, the first screening chamber, the second screening chamber and the third screening chamber are distributed in parallel and connected at the top, the first filter plate group comprises a plurality of first filter plates hinged in sequence, the main body of the first filter plate group is tiltedly arranged in the second screening chamber, the first end of the first filter plate group is connected to the device shell, and the second end of the first filter plate group is connected to the device shell through the reset component and extends into the first screening chamber, the reset component is configured to provide a pulling force to straighten the first filter plate group, the bending component is provided on the side of the first filter plate group, a support rod is provided below one of the two adjacent first filter plates close to the folding position, and the bending component is configured to overcome the reset The component provides a pulling force for the first filter plate group so that two adjacent first filter plates are folded to one side through the support rod, the second filter plate group includes a plurality of second filter plates hinged in sequence, the main body of the second filter plate group is obliquely arranged in the second screening chamber, its first end is connected to the device housing, and its second end is connected to the device housing through the reset component and extends into the third screening chamber, the reset component is configured to provide a pulling force to straighten the second filter plate group, the side of the second filter plate group is provided with the bending component, and a support rod is provided below one side of one of the two adjacent second filter plates close to the folding position, the bending component is configured to overcome the pulling force provided by the reset component for the second filter plate group so that the two adjacent second filter plates are folded to one side through the support rod, the first filter plate group is located above the second filter plate group, and the filtering accuracy of the first filter plate group is less than that of the second filter plate group.

[0008] In one embodiment, the bending assembly includes a traction mechanism, a bending mechanism and a bending rod. The traction mechanism is arranged along the extension direction of the filter plate group and is arranged to be able to pull the bending mechanism to drive the bending rod to move along the extension direction of the filter plate group. The bending mechanism is arranged to be able to intermittently rotate the bending rod during the movement so that it can abut against and push two different adjacent filter plates to fold to one side multiple times.

[0009] In one embodiment, the traction mechanism includes a driving motor, a power gear and a first guide rail, the driving motor is used to drive the power gear to rotate, the power gear and the bending mechanism are connected to be relatively rotatable, the first guide rail is connected to the device housing, and a first rack is provided on the side of the first guide rail, the power gear and the first rack are meshed, and the driving motor drives the power gear to rotate so that it moves relative to the first rack and thereby drives the bending mechanism to move.

[0010] In one embodiment, the bending mechanism includes a driving gear and a second guide rail, the driving gear and the power gear are coaxially arranged and can rotate relative to each other, and the driving gear is fixedly connected to the bending rod, the second guide rail is connected to the device housing, and a plurality of second racks are spaced apart on the side of the second guide rail. During the process of the power gear driving the driving gear to move, it intermittently meshes with the second rack and rotates thereby driving the bending rod to rotate intermittently.

[0011] In one embodiment, the first guide rail is an annular guide rail, the first rack is arranged around the inner side of the annular guide rail, the second guide rail is a linear guide rail, the linear guide is arranged in the annular guide rail, and the multiple second racks are arranged on the side of the linear guide rail facing the filter plate group.

[0012] In one embodiment, the bending rod includes a supporting portion and a connecting portion, the supporting portion and the connecting portion are connected in an L shape, the supporting portion is a cylindrical structure, and one end of the connecting portion away from the supporting portion is fixedly connected to the end of the driving gear away from the power gear.

[0013] In one embodiment, the axial dimension of the driving gear is greater than the axial dimension of the power gear; and the power gear and the driving gear are rotatably connected via a bearing.

[0014] In one embodiment, two adjacent first filter plates are rotatably connected via a connecting plate; and two adjacent second filter plates are rotatably connected via a connecting plate.

[0015] In one embodiment, the reset assembly includes a recovery member and a pull rope, wherein the recovery member is connected to the device housing and is configured to be able to pull and retract the pull rope, and the pull rope is connected to the second end of the filter plate group.

[0016] In one embodiment, the recovery member is a rotating shaft with a torsion spring.

[0017] The beneficial effects of the present invention are:

[0018] The multi-stage ore screening device of the present invention can, during the ore screening process, fold two adjacent filter plates in the first filter plate group and the second filter plate group through a bending component, and flatten the folded filter plates again through a resetting component to facilitate the folding of the next group of two adjacent filter plates. This folding can cause the bottom surfaces of the two adjacent filter plates to clap, thereby knocking out the stuck ore, and the vibration force generated in this process can also assist in producing this effect, preventing the ore from clogging the filter holes on the filter plate, which can not only effectively ensure the screening efficiency of the ore, but also effectively separate ore particles of different particle sizes to ensure the screening effect.

[0019] The present invention also sets a traction mechanism to pull the bending mechanism and drive the bending rod to move along the extension direction of the filter plate group, so that the bending mechanism can intermittently rotate the bending rod during the movement, and then repeatedly abut against and push two different adjacent filter plates to fold to one side. Based on this, a set of bending mechanisms can be used to enable the filter plates at different positions to be folded. When adjacent filter plates are folded to one side, vibration force can be generated, which vibrates the ore blocking the filter holes and makes them escape from the filter holes, so as to ensure the screening efficiency of the multi-stage ore screening device.

[0020] The present invention ensures the traction effect of the traction mechanism by arranging the power gear and the first rack, thereby ensuring the effective movement of the bending mechanism, which can not only ensure effective traction force but also effectively ensure movement accuracy.

[0021] The present invention also ensures the bending effect of the bending mechanism by driving the gear and a plurality of second racks arranged at intervals, which not only ensures that the bending rod can effectively rotate at a plurality of different positions, but also effectively ensures the effect of pushing the filter plate to fold.

[0022] The present invention also arranges the first rack in a circular manner on the inner side surface of the annular guide rail, and arranges multiple second racks at intervals on the side surface of the linear guide rail facing the filter plate group, so that the bending mechanism can intermittently drive the bending rod to work when passing the side facing the filter plate group, thereby effectively ensuring the bending effect, and the bending mechanism can be undriven when passing the side away from the filter plate group, thereby ensuring the return speed.

[0023] The present invention also ensures a constant abutment effect by providing a cylindrical abutment portion, thereby effectively ensuring a bending effect.

[0024] The present invention also ensures the bending force and thus the bending effect by setting the axial dimension of the driving gear to be larger than the axial dimension of the power gear; in addition, the present invention also ensures the rotatable connection effect between the power gear and the driving gear by rotatably connecting them with bearings, thereby effectively ensuring that they can work separately.

[0025] The present invention also realizes the connection of adjacent filter plates by means of a connecting plate, which can not only effectively ensure the rotatable effect, but also better ensure the bending effect.

[0026] In addition, the present invention also takes into account the straightening effect of the filter plate group and the bending effect between two adjacent filter plates through the arrangement of the recovery member and the pull rope, which can not only effectively ensure the screening effect, but also effectively ensure the cleaning effect of the filter plates, thereby effectively ensuring long-term and effective screening. Among them, the recovery member is preferably a rotating shaft with a torsion spring, which can effectively simplify the overall structure of the reset assembly while ensuring the recovery effect.

[0027] In summary, based on the above-mentioned arrangement, the multi-stage ore screening device of the present invention is implemented by means of rapid folding and slow retraction. During the rapid ascent of the filter plate, the material moves upward, while the large particles of material remain in place due to being on the upper layer and having large inertia, while the small materials move upward. During the slow descent of the filter plate, the large particles of material are discharged, thereby separating the ore particles of different particle sizes. Specifically, taking the first filter plate group as an example, the beating process of the filter plate is as follows: First, the bending rod moves to the upper end along the extension direction of the second guide rail under the drive of the power gear. During this process, the bending rod slides on the upper surface of the first filter plate. When the second rack contacts the driving gear, the driving gear is driven by the second rack to rotate due to the upward movement of the bending assembly. The two adjacent first filter plates rotate around the hinge point of the connecting plate. Because the lower surface of the first filter plate is supported by the support rod, the first filter plate in contact with the bending rod rotates. Since the first filter plate located in the upper end direction of the second guide rail is supported by the support rod and does not rotate, when the two adjacent first filter plates When the lower surfaces of the two filter plates come into contact with each other, the driving gear has passed the area where the second rack is located, so the support rod will not interfere with the movement of the first filter plate group. At the same time, the bending rod loses the power of rotation, so that the two folded first filter plates are restored to their original straightened state under the traction of the rotating shaft with torsion spring. The resetting of the first filter plate group also restores the bending assembly to its original state; when performing the next folding, the materials carried on the upper surfaces of the two adjacent first filter plates will be folded together, but because the connecting plate provides a movable cavity, it can effectively prevent the first filter plate group from getting stuck during the folding process, thereby ensuring the continuous folding action, and thus effectively ensuring the slapping and screening effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the external structure of an embodiment of the multi-stage ore screening device of the present invention;

[0029] Figure 2 A first cross-sectional view of an embodiment of a multi-stage ore screening device of the present invention;

[0030] Figure 3 for Figure 2 The enlarged view of A in FIG.

[0031] Figure 4 A second cross-sectional view of an embodiment of the multi-stage ore screening device of the present invention;

[0032] Figure 5 for Figure 4 The enlarged view of point B in FIG.

[0033] Figure 6 It is a schematic diagram of the local structure of the present invention.

[0034] in:

[0035] 100. Multi-stage ore screening device; 110. Device housing; 1101. First screening chamber; 1102. Second screening chamber; 1103. Third screening chamber; 111. Feeding chamber; 112. First guide rail; 1121. First rack; 113. Second guide rail; 1131. Second rack; 114. Rotating shaft with torsion spring; 115. Pull rope; 116. First connecting rod; 117. Second connecting rod; 118. Support rod; 210. First filter plate group; 211. First filter plate; 212. First surface; 213. Connecting plate; 214. Second surface; 220. Second filter plate group; 221. Second filter plate; 230. Bending assembly; 231. Power gear; 232. Bearing; 233. Driving gear; 234. Bending rod; 2341. Abutment portion; 2342. Connecting portion. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "communication" mentioned in this application include direct and indirect connections unless otherwise specified. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention 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 on the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Based on the problem mentioned in the background technology that the existing ore screening device has reduced filtration efficiency and poor screening effect due to filter screen clogging, a multi-stage ore screening device is provided.

[0040] First, see Figures 1 to 3 ,in, Figure 1 The figure is a schematic diagram of the external structure of an embodiment of the multi-stage ore screening device of the present invention. Figure 2 is a first cross-sectional view of an embodiment of a multi-stage ore screening device of the present invention, Figure 3 for Figure 2 The enlarged view of A in FIG. Figures 1 to 3 As shown, the multi-stage ore screening device 100 of the present invention includes a device housing 110 and a first filter plate group 210, a second filter plate group 220, a reset assembly and a bending assembly 230 connected to the device housing 110. The device housing 110 is formed with a feed chamber 111, a first screening chamber 1101, a second screening chamber 1102 and a third screening chamber 1103. The feed chamber 111 is located above the second screening chamber 1102. The first screening chamber 1101, the second screening chamber 1102 and the third screening chamber 1103 are distributed in parallel and connected at the top. The first filter plate group 210 includes a plurality of first filter plates 211 hinged in sequence. The main part of the first filter plate group 210 is tilted in the second screening chamber 1102, and its first end is connected to the device housing 110. The second end is connected to the device housing 110 through the reset assembly and extends into the first screening chamber 1101. Specifically, in this specific embodiment, the first end of the first filter plate group 210 is fixedly connected to the device housing 110 through the first connecting rod 116. Of course, the specific connection method is not restrictive, and those skilled in the art can set it according to actual conditions.

[0041] The reset assembly is configured to provide a pulling force to straighten the first filter plate group 210, a bending assembly 230 is provided on the side of the first filter plate group 210, a support rod 118 is provided below one side of one of the two adjacent first filter plates 211 close to the folding position, the support rod 118 is a cylindrical structure, and is arranged along the length direction of the first filter plate 211, the bending assembly 230 is configured to overcome the pulling force provided by the reset assembly to the first filter plate group 210 so that the two adjacent first filter plates 211 are folded to one side through the support rod 118, the second filter plate group 220 includes a plurality of second filter plates 221 hinged in sequence, and the main body of the second filter plate group 220 is inclinedly arranged at the second filter plate group 220. In the screening chamber 1102, its first end is fixedly connected to the device housing 110 through the second connecting rod 117, and its second end is connected to the device housing 110 through the reset assembly and extends into the third screening chamber 1103. The reset assembly is configured to provide a pulling force for straightening the second filter plate group 220. A bending assembly 230 is provided on the side of the second filter plate group 220. The bending assembly 230 is configured to overcome the pulling force provided by the reset assembly to the second filter plate group 220 and fold the two adjacent second filter plates 221 to one side. The first filter plate group 210 is located above the second filter plate group 220, and the filtering accuracy of the first filter plate group 210 is less than the filtering accuracy of the second filter plate group 220.

[0042] It should be noted that the present invention does not impose any restrictions on the specific structure of the first filter plate group 210 and the second filter plate group 220. For example, the multiple first filter plates 211 of the first filter plate group 210 or the multiple second filter plates 221 of the second filter plate group 220 can be connected by a rotating shaft, as long as the two adjacent filter plates can be folded to one side; of course, it is understandable that when two adjacent filter plates are folded, the screened material carried thereon needs to be accommodated between them, so a certain folding gap needs to be maintained between the two to store this part of the material. Preferably, in this specific embodiment, if Figure 3 As shown, two adjacent first filter plates 211 and two adjacent second filter plates 221 are rotatably connected via a connecting plate 213. After the two adjacent filter plates are rotated by the pressure of the bending assembly 230, the first surface 212 of one filter plate and the second surface 214 of the adjacent filter plate are relatively folded. The connecting plate 213 can not only effectively ensure the rotatable effect, but also better ensure the bending effect.

[0043] Specifically, after the ore to be screened enters the feed chamber 111, it first falls onto the first filter plate group 210 with a smaller filtering accuracy. The bending component 230 can fold the two adjacent first filter plates 211 to one side (the first surface 212 of the first filter plate 211 and the second surface 214 of the adjacent first filter plate 211 are opposite), and the reset component can flatten the two folded first filter plates 211 to facilitate the folding of the next group of two adjacent first filter plates 211. This folding causes the first surface 212 and the second surface 214 to collide, thereby knocking out the stuck ore, and the vibration force generated in this process can also assist in producing this effect, thereby avoiding clogging of the filter holes and improving screening efficiency. Furthermore, the ore particles that are larger than the filter holes of the first filter plate 211 screened by the first filter plate group 210 enter the first screening chamber 1101, and the ore particles that are smaller than the filter holes of the first filter plate 211 fall into the second filter plate group 220 with a larger filtering accuracy. The second filter plate group 220 further screens the ore particles based on the same principle, and the ore particles that are larger than the filter holes of the second filter plate 221 enter the third screening chamber 1103, and the ore particles that are smaller than the filter holes of the second filter plate 221 fall into the second screening chamber 1102, thereby achieving the purpose of multi-stage screening of ore. The bending component 230 and the reset component can prevent the ore from blocking the filter holes on the filter plate, effectively ensuring the screening efficiency of the ore.

[0044] In addition, it should be noted that the present invention does not impose any restrictions on the specific structure of the bending assembly 230 and the reset assembly. For example, a plurality of bending assemblies 230 can be provided, and they are arranged on the side of each filter plate. The bending assembly 230 can intermittently apply pressure to the corresponding filter plate so that the adjacent filter plates can be folded to one side; the reset assembly can be a spring structure or a damping structure, as long as it can reset the folded filter plate, and technical personnel in this field can set it according to actual conditions.

[0045] See also Figure 4 The reset assembly of this embodiment includes a recovery member and a pull rope 115. Preferably, the recovery member is a rotating shaft 114 with a torsion spring. The rotating shaft 114 with a torsion spring is connected to the device housing 110 and can pull and retract the pull rope 115. The pull rope 115 is connected to the second end of the filter plate group. The setting of the rotating shaft 114 with a torsion spring and the pull rope 115 takes into account the straightening effect of the filter plate group and the bending effect between two adjacent filter plates. This can not only effectively ensure the screening effect, but also effectively ensure the cleaning effect of the filter plate, thereby effectively ensuring long-term and effective screening. In addition, the rotating shaft 114 with a torsion spring can effectively simplify the overall structure of the reset assembly while ensuring the recovery effect.

[0046] Further, as a preferred embodiment, refer to Figures 4 to 6 ,in, Figure 4 is a second cross-sectional view of an embodiment of the multi-stage ore screening device of the present invention, Figure 5 for Figure 4 The enlarged view of point B in the figure, Figure 6 It is a schematic diagram of the local structure of the present invention. Figures 4 to 6 As shown, in this specific embodiment, the bending assembly 230 includes a traction mechanism, a bending mechanism and a bending rod 234. The traction mechanism is arranged along the extension direction of the filter plate group and is arranged to be able to pull the bending mechanism to drive the bending rod 234 to move along the extension direction of the filter plate group. The bending mechanism can intermittently rotate the bending rod 234 during the movement so that it can abut against and push two different adjacent filter plates to fold to one side multiple times. A set of bending mechanisms can make the filter plates at different positions fold, and when the adjacent filter plates fold to one side, a slapping effect can be generated, thereby slapping out large particles of material to avoid clogging of the filter holes, so as to ensure the screening efficiency of the ore multi-stage screening device 100.

[0047] Specifically, the traction mechanism includes a driving motor (not shown in the figure), a power gear 231 and a first guide rail 112. The driving motor is used to drive the power gear 231 to rotate. The power gear 231 is connected to the bending mechanism so that it can rotate relatively. The first guide rail 112 is connected to the device housing 110, and a first rack 1121 is provided on the side of the first guide rail 112. The power gear 231 and the first rack 1121 are meshed. The driving motor drives the power gear 231 to rotate so that it moves relative to the first rack 1121 and thereby drives the bending mechanism to move. Furthermore, the bending mechanism includes a driving gear 233 and a second guide rail 113. The driving gear 233 and the power gear 231 are coaxially arranged and can rotate relative to each other, and the driving gear 233 is fixedly connected to the bending rod 234. The second guide rail 113 is connected to the device housing 110, and a plurality of second racks 1131 are arranged at intervals on the side of the second guide rail 113. During the process of the power gear 231 driving the driving gear 233 to move, it intermittently meshes with the second rack 1131 and rotates thereby driving the bending rod 234 to rotate intermittently.

[0048] It should be noted that the specific rotational connection method between the driving gear 233 and the power gear 231 is not restrictive. As a preferred embodiment, the driving gear 233 and the power gear 231 are coaxially and relatively rotated through the bearing 232; in addition, the axial dimension of the driving gear 233 is larger than the axial dimension of the power gear 231. The present invention ensures the bending force and thus the bending effect by setting the axial dimension of the driving gear 233 to be larger than the axial dimension of the power gear 231; in addition, the present invention also ensures the rotatable connection effect between the power gear 231 and the driving gear 233 by rotatably connecting them with the bearing 232, thereby effectively ensuring that they can work separately.

[0049] The present invention ensures the traction effect of the traction mechanism by setting the power gear 231 and the first rack 1121, thereby ensuring the effective movement of the bending mechanism, which can not only ensure effective traction, but also effectively ensure the movement accuracy. In addition, the driving gear 233 and the plurality of second racks 1131 arranged at intervals can also effectively ensure the bending effect of the bending mechanism, which can not only ensure that the bending rod 234 can effectively rotate at a plurality of different positions, but also effectively ensure its effect of pushing the filter plate to fold.

[0050] In addition, the present invention does not impose any restrictions on the specific structure of the first guide rail 112, the second guide rail 113 and the bending rod 234. Those skilled in the art can set them according to actual conditions, as long as the bending effect of the bending component 230 is achieved so that two adjacent filter plates in the filter plate group can be folded to one side.

[0051] Preferably, as a specific implementation method, refer to Figure 2 , 4 and 5, the first guide rail 112 is an annular guide rail, the first rack 1121 is arranged around the inner side of the annular guide rail, the second guide rail 113 is a linear guide rail, the linear guide rail is arranged in the annular guide rail, and a plurality of second racks 1131 are arranged on the side of the linear guide rail facing the filter plate group. The first rack 1121 is arranged around the inner side of the annular guide rail, and the plurality of second racks 1131 are arranged at intervals on the side of the linear guide rail facing the filter plate group, so that the bending mechanism can intermittently drive the bending rod 234 to work when passing the side facing the filter plate group, effectively ensuring the bending effect, and the bending mechanism can not be driven to work when passing the side away from the filter plate group, thereby ensuring the return speed.

[0052] Further preferably, the bending rod 234 includes a supporting portion 2341 and a connecting portion 2342, the supporting portion 2341 and the connecting portion 2342 are connected in an L shape, the supporting portion 2341 is a cylindrical structure, and the cylindrical supporting portion 2341 can ensure a constant supporting effect, thereby effectively ensuring a bending effect; one end of the connecting portion 2342 away from the supporting portion 2341 is fixedly connected to the end of the driving gear 233 away from the power gear 231.

[0053] Based on this, the multi-stage ore screening device 100 of the present invention folds two adjacent filter plates in the first filter plate group 210 and the second filter plate group 220 through the bending component 230, and flattens the folded filter plates again through the reset component to facilitate the folding of the next group of two adjacent filter plates. This folding can cause the bottom surfaces of the two adjacent filter plates to be slapped, thereby knocking out the stuck ore, and the vibration force generated in this process can also assist in producing this effect, preventing the ore from clogging the filter holes on the filter plates, which can not only effectively ensure the screening efficiency of the multi-stage ore screening device 100, but also effectively separate ore particles of different particle sizes to ensure the screening effect.

[0054] Based on the above structural setting, the working process of the multi-stage ore screening device 100 of the present invention is as follows: the ore to be screened enters through the feed chamber 111 and contacts the first filter plate group 210 first. The first filter plate group 210 screens out ore particles larger than the filter holes of the first filter plate 211 and enters the first screening chamber 1101, and ore particles smaller than the filter holes of the first filter plate 211 fall onto the second filter plate group 220. The second filter plate group 220 further screens the ore particles according to the same principle. Ore particles larger than the filter holes of the second filter plate 221 enter the third screening chamber 1103, and ore particles smaller than the filter holes of the second filter plate 221 fall into the second screening chamber 1102, thereby achieving the purpose of multi-stage ore screening. In addition, during the screening process, the cooperation of the bending assembly 230 and the reset assembly can clean the filter holes by clapping to achieve the effect of preventing clogging. Specifically, taking the first filter plate group 210 as an example, first, the bending rod 234 moves upward along the extension direction of the second guide rail 113 under the drive of the power gear 231. During this process, the bending rod 234 slides on the upper surface of the first filter plate 211. When the second rack 1131 contacts the driving gear 233, the driving gear 233 is driven by the second rack 1131 to rotate due to the upward movement of the bending assembly 230. The two adjacent first filter plates 211 rotate around the hinge point of the connecting plate 213. Because the lower surface of the first filter plate 211 is supported by the support rod 118, the first filter plate 211 contacting the bending rod 234 rotates. Since the first filter plate 211 located in the upper end direction of the second guide rail 113 is supported by the support rod 118, the first filter plate 211 contacting the bending rod 234 rotates. 8 is supported without rotation. When the first surface 212 and the second surface 214 of two adjacent first filter plates 211 come into contact, the driving gear 233 has passed the area where the second rack 1131 is located, so that the support rod 118 will not interfere with the movement of the first filter plate group 210. At the same time, the bending rod 234 loses the power of rotation, so that the two folded first filter plates 211 are restored to the original straightened state under the traction of the torsion spring shaft 114. The resetting of the first filter plate group 210 also restores the bending assembly 230 to its original state. When folding, the materials carried on the upper surfaces of the two adjacent first filter plates 211 will be folded together, but because the connecting plate 213 provides a movable cavity, the two folded first filter plates 211 can accommodate the carried materials, so that the first filter plate group 210 can be effectively prevented from getting stuck during the folding process, thereby effectively ensuring the continuous slapping effect.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A multi-stage ore screening device, characterized in that: It comprises a device housing, and a first filter plate group, a second filter plate group, a reset component and a bending component connected to the device housing; The device housing is formed with a feed chamber, a first screening chamber, a second screening chamber and a third screening chamber, the feed chamber is located above the second screening chamber, the first screening chamber, the second screening chamber and the third screening chamber are arranged in parallel and connected at the top; The first filter plate group comprises a plurality of first filter plates hinged in sequence, the main body of the first filter plate group is tiltedly arranged in the second screening chamber, the first end of the first filter plate group is connected to the device housing, and the second end of the first filter plate group is connected to the device housing through the reset component and extends into the first screening chamber, the reset component is arranged to provide a pulling force to straighten the first filter plate group, the side of the first filter plate group is provided with the bending component, and a support rod is arranged below one side of one of the two adjacent first filter plates close to the folding position, and the bending component is arranged to overcome the pulling force provided by the reset component to the first filter plate group so that the two adjacent first filter plates can be folded to one side through the support rod; The second filter plate group includes a plurality of second filter plates hinged in sequence, the main body of the second filter plate group is tiltedly arranged in the second screening chamber, the first end of the second filter plate group is connected to the device housing, and the second end of the second filter plate group is connected to the device housing through the reset component and extends into the third screening chamber, the reset component is arranged to provide a pulling force to straighten the second filter plate group, the side of the second filter plate group is provided with the bending component, and a support rod is arranged below one side of one of two adjacent second filter plates close to the folding position, the bending component is arranged to overcome the pulling force provided by the reset component to the second filter plate group so that the two adjacent second filter plates are folded to one side through the support rod; the folding causes the bottom surfaces of the two adjacent filter plates to clap; The first filter plate group is located above the second filter plate group, and the filtering accuracy of the first filter plate group is less than the filtering accuracy of the second filter plate group, and the bending assembly includes a traction mechanism, a bending mechanism and a bending rod; The traction mechanism is arranged along the extension direction of the filter plate group and is arranged to be able to pull the bending mechanism to drive the bending rod to move along the extension direction of the filter plate group; The bending mechanism is configured to intermittently rotate the bending rod during the movement so that the bending rod can abut against and push two different adjacent filter plates to fold to one side for multiple times, and the traction mechanism includes a driving motor, a power gear and a first guide rail; The driving motor is used to drive the power gear to rotate, the power gear is connected to the bending mechanism so as to be relatively rotatable, the first guide rail is connected to the device housing, and a first rack is provided on the side of the first guide rail, and the power gear is meshed with the first rack; The driving motor drives the power gear to rotate so as to move the power gear relative to the first rack and thereby drive the bending mechanism to move, wherein the bending mechanism includes a driving gear and a second guide rail; The driving gear and the power gear are coaxially arranged and can rotate relative to each other, and the driving gear is fixedly connected to the bending rod, the second guide rail is connected to the device housing, and a plurality of second racks are arranged at intervals on the side of the second guide rail; In the process of the power gear driving the driving gear to move, it intermittently meshes with the second rack and rotates thereby to drive the bending rod to rotate intermittently, the first guide rail is an annular guide rail, the first rack is arranged around the inner side surface of the annular guide rail, the second guide rail is a linear guide rail, the linear guide rail is arranged in the annular guide rail, and the plurality of second racks are arranged on the side of the linear guide facing the filter plate group, the bending rod includes a supporting portion and a connecting portion, the supporting portion and the connecting portion are connected to form an L shape, the supporting portion is a cylindrical structure, an end of the connecting portion away from the supporting portion is fixedly connected to the end of the driving gear away from the power gear, the axial size of the driving gear is larger than the axial size of the power gear; and the power gear and the driving gear are rotatably connected by a bearing, and two adjacent first filter plates are rotatably connected by a connecting plate; and two adjacent second filter plates are rotatably connected by a connecting plate.

2. The multi-stage ore screening device according to claim 1, characterized in that: The reset assembly includes a recovery member and a pull rope; The recovery member is connected to the device housing and is configured to pull and retract the pull rope, which is connected to the second end of the filter plate group.

3. The multi-stage ore screening device according to claim 2, characterized in that: The recovery component is a rotating shaft with a torsion spring.

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