Multi-layer water sieve screening machine

Abstract

The invention relates to the technical field of screening mechanical equipment, in particular to a multi-layer water screen screening machine which comprises a screening box, a screen, a jacking mechanism and a water spraying mechanism, the screen is obliquely inserted into the screening box, and the two ends, in the material conveying direction, of the screen are elastically connected to the screening box; the multiple screens are arranged in parallel in the vertical direction at intervals. The jacking mechanism is inserted into the screening box and comprises a plurality of jacking assemblies used for periodically jacking the screen. The water spraying mechanism is arranged on the screening box and used for spraying water from top to bottom so as to wash the materials. During use, materials can move along the screen meshes and be gradually screened by the screen meshes under the guide of the inclined planes of the screen meshes and the driving of water flow, and the jacking assemblies periodically jack up the corresponding screen meshes, so that the materials are broken, the retention time of the materials on the screen meshes is prolonged, the screen meshes can vibrate, the blockage of screen holes can be reduced, and the service life of the screen meshes is prolonged. The screening effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of screening mechanical equipment, in particular to a multi-layer water screen screening machine. Background Art

[0002] Screening machine is a kind of vibration separation equipment used to separate powder, granules and liquid slurry. It is widely used in chemical, pharmaceutical, food processing and other fields. Its main function is to make the material move on the screen surface through vibration, so as to separate materials of different particle sizes.

[0003] There are many types of screening machines, common types include rocking screens, vibrating screens, linear vibrating screens, centrifugal screens, high-speed slurry filter screens and water screens, etc. The water screen is a device used to separate water or other liquids from a liquid-solid mixture. This type of screening machine usually has an inclined screen slot and can be open or closed in design. It is driven by a dual vibration motor mounted on the top or bottom to achieve high vertical acceleration, thereby achieving the best dehydration effect.

[0004] In the related art, for example, Chinese patent CN107583848B discloses a multi-layer water screen screening machine. When the multi-layer water screen screening machine starts the screening operation, the discharge valve of the ore under the screen and the discharge valve of the ore on the screen are first closed, and the water supply valve is opened to add water into the screen cylinder; when the water submerges the first-stage screening device, the vibration motor is started, and then the feed valve, the discharge valve of the ore on the screen, and the discharge valve of the ore under the screen are opened to carry out the screening operation; during the screening operation, the screening device is kept submerged in the ore slurry by comprehensively adjusting each valve; the ore is fed from the main feed pipe through four The ore under the screen is fed into the first-stage screening device through a small feeding pipe. The ore under the screen is collected by the ore under the screen collector and then discharged into the main discharge pipe at the bottom through the discharge port at the connection between the main discharge pipe and the ore under the screen collector. The ore on the screen slides over the screen surface and settles along the peripheral area inside the screen cylinder. By analogy, the feeding and discharging of the multi-layer screening devices are completed in sequence. The ore under the screen of each layer of the screening devices is combined in the discharge main pipe and then discharged through the ore discharge pipe of the ore under the screen. The ore on the screen of each layer of the screening devices is settled and collected in the peripheral area inside the screen cylinder and then discharged through the ore discharge pipe of the ore on the screen, thus completing the screening process of the feed ore.

[0005] When the existing water screen screening machine is in use, the residence time of the material on the screen is fixed, which may cause the problem of incomplete screening of some materials, affecting both the screening effect and the screening efficiency. Summary of the invention

[0006] Based on this, it is necessary to provide a multi-layer water screen screening machine to address the problems of poor screening effect and low screening efficiency in the screening process of the current water screen screening machine.

[0007] The above purpose is achieved through the following technical solutions: A multi-layer water screen screening machine, the multi-layer water screen screening machine comprising: Screening box; A screen is obliquely inserted in the screening box, and the two ends of the screen along the material conveying direction are elastically connected to the screening box; there are multiple screens, and the multiple screens are arranged in parallel and at intervals along the vertical direction; A lifting mechanism is inserted into the screening box and includes a plurality of lifting components, wherein the lifting components are arranged in a one-to-one correspondence with the screens and are respectively located below the corresponding screens, and the lifting components are configured to periodically lift the corresponding screens; The water spraying mechanism is arranged on the screening box and is configured to spray water from top to bottom to wash the materials.

[0008] Furthermore, the lifting assembly includes a horizontally arranged rotating shaft, and the axis of the rotating shaft is arranged perpendicular to the material conveying direction; a cam is sleeved on the rotating shaft; the rotating shaft can rotate to synchronously drive the cam to rotate around its own large end axis; when the cam rotates, its own small end can periodically lift up the screen.

[0009] Furthermore, there are a plurality of cams sleeved on the rotating shaft, and adjacent cams are staggered by 180 degrees.

[0010] Furthermore, the number of rotating shafts of the same lifting assembly is even, and the rotating shafts of the same lifting assembly are grouped in pairs, the rotating shafts in different groups are arranged at intervals along the material conveying direction, the two rotating shafts in the same group are arranged close to each other, and rotate in opposite directions, and the two cams corresponding to the material conveying direction are staggered by 180 degrees.

[0011] Furthermore, the two cams on the rotating shaft of adjacent groups and located on the same side are staggered by 180 degrees.

[0012] Furthermore, the cam can slide elastically on the rotating shaft; there are two cams sleeved on each rotating shaft; the multi-layer water screen screening machine also includes a moving mechanism, and the moving mechanism is configured to drive the cam to slide on the rotating shaft when the cam rotates.

[0013] Furthermore, the moving mechanism includes a plurality of moving components, the moving components and the cams are arranged in one-to-one correspondence, each of the moving components includes a protrusion and a groove, the protrusion is fixedly arranged on the screening box; the groove is opened on the end face of the cam, and the groove can be engaged with the protrusion.

[0014] Furthermore, each of the moving components has a plurality of grooves which are arranged along the circumferential direction.

[0015] Furthermore, a protrusion is provided on the small end of the cam, and the protrusion is configured to increase the friction between the cam and the screen.

[0016] Furthermore, the multi-layer water screen screening machine also includes a material collecting mechanism, which is configured to collect the material on the screen when the small ends of the two cams corresponding to the material conveying direction on the two rotating shafts of the same group are opposite to each other.

[0017] The beneficial effects of the present invention are: When a multi-layer water screen screening machine provided by the present invention is used, the material is first continuously put into the screening box from the position at the top of the screen, and the water spraying mechanism and the lifting mechanism are started at the same time, wherein the water spraying mechanism can spray water from top to bottom, and under the inclined guiding effect of the screen and the impact effect of the water flow, the material can move from top to bottom along the screen; in the process of material movement, the larger-sized material remains on the topmost screen, and the other-sized materials pass through the upper screen in turn, and the lifting mechanism can lift the screen periodically, which can not only cause the material to have a fault, so that the material stays on the screen for a longer time, but also cause the screen to vibrate, thereby reducing the blockage of the screen holes, improving the screening effect, and helping to reduce the subsequent repeated screening process, thereby improving the screening efficiency.

[0018] Furthermore, by providing a plurality of cams sleeved on the rotating shaft, adjacent cams are staggered by 180 degrees, so that when in use, during the rotation of the rotating shaft, the screen located in the same horizontal direction can form a wave shape under the drive of the cam, wherein the material located at the crest of the wave can move to the trough of the wave, while improving the uniformity of material distribution, the utilization rate of the screen can be effectively improved, and the residence time of the material on the screen can be further increased by increasing the stroke of the material on the screen, thereby further improving the screening effect.

[0019] Furthermore, by setting the number of rotating shafts of the same lifting component to be an even number, and the rotating shafts of the same lifting component are grouped in pairs, the rotating shafts of different groups are arranged at intervals along the material conveying direction, the two rotating shafts of the same group are arranged close to each other, and the rotation directions are opposite, and the two cams corresponding to the material conveying direction are staggered by 180 degrees, so that when in use, the cams on the two rotating shafts of the same group can further increase the area of ​​the screen being lifted, thereby increasing the area of ​​the fault on the one hand and further increasing the residence time of the material on the screen, and on the other hand can further increase the vibration intensity of the screen, while reducing material accumulation and improving the screening effect.

[0020] Furthermore, the two cams on the same side of the rotating shaft of adjacent groups are staggered by 180 degrees, so that when in use, during the rotation of the rotating shaft, the screen along the material conveying direction can form a wavy shape, wherein the material at the crest can move to the trough, thereby further increasing the material's travel on the screen, further increasing the material's residence time on the screen, and further improving the screening effect.

[0021] Furthermore, by providing a cam that can elastically slide and move on the rotating shaft, when in use, during the rotation of the rotating shaft, the cam can rotate and move under the action of the moving mechanism, thereby further improving the vibration intensity of the screen, while reducing material accumulation and improving the screening effect.

[0022] Furthermore, by providing each movable component with a plurality of grooves and arranging them circumferentially, when in use, the cam can move on the rotating shaft at a higher frequency through the cooperation between the protrusions and the grooves, thereby further improving the vibration intensity of the screen and improving the screening effect.

[0023] Furthermore, by setting up a material receiving mechanism, when in use, during the rotation of the rotating shaft, the cams on the two rotating shafts of the same group can drive the screen to form a U-shaped material pocket portion, and the material receiving mechanism can promptly receive part of the material in the material pocket portion, thereby reducing the occupancy of the screen by the screened material, which is conducive to further improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a multi-layer water screen screening machine provided in one embodiment of the present invention; Figure 2 A schematic diagram of the top view of a multi-layer water screen screening machine provided in one embodiment of the present invention; Figure 3 for Figure 2 AA section view in; Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at B in the middle; Figure 5 for Figure 3 A schematic diagram of the partially enlarged structure at C in the middle; Figure 6 A schematic diagram of the three-dimensional structure of a multi-layer water screen sieving machine without a cover provided by an embodiment of the present invention Figure 1 ; Figure 7 A schematic diagram of the three-dimensional structure of a multi-layer water screen sieving machine without a cover provided by an embodiment of the present invention Figure 2 ; Figure 8A schematic diagram of a top view of a multi-layer water screen sieving machine with a cover removed provided in one embodiment of the present invention; Fig. 9 for Figure 8 Middle DD section view; Fig.10 for Fig. 9 The schematic diagram of the local enlarged structure at E in the middle; Fig.11 A schematic diagram of the exploded parts of a multi-layer water screen sieving machine with the cover removed provided in one embodiment of the present invention; Fig.12 for Fig.11 The schematic diagram of the partial enlarged structure at F in the middle; Fig.13 for Fig.11 A schematic diagram of the local enlarged structure at G in the middle; Fig.14 for Fig.11 Schematic diagram of the local enlarged structure at H in the middle.

[0025] in: 1. Frame; 2. Screening box; 201. Mounting slot; 202. Mounting hole; 21. First discharging plate; 211. First discharging port; 22. Second discharging plate; 221. Second discharging port; 23. Collecting plate; 231. Third discharging port; 24. Cover; 2401. Feed port; 241. Inspection plate; 25. Water inlet pipe; 26. Elastic telescopic rod; 27. Tension spring; 3. Screen; 4. Lifting assembly; 41. Rotating shaft; 411. Fixing bar; 42. Cam; 421. Protrusion; 43. Second driving motor; 44. First gear; 45. Second gear; 46. Compression spring; 5. moving mechanism; 51. protrusion; 52. groove; 6. Material receiving mechanism; 61. Material receiving hole; 62. Material receiving frame. DETAILED DESCRIPTION

[0026] 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.

[0027] 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 "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are 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 to the present invention.

[0028] 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.

[0029] like Figures 1 to 14 As shown, a multi-layer water screen screening machine provided by an embodiment of the present invention is used for screening materials, and is configured to include a screening box 2, a screen 3, a lifting mechanism and a water spraying mechanism, wherein the screen 3 is obliquely inserted into the screening box 2, and the two ends of the screen 3 along the material conveying direction are elastically connected to the screening box 2; there are multiple screens 3, and the multiple screens 3 are parallel and arranged at intervals in the vertical direction; the lifting mechanism is inserted into the screening box 2, and includes multiple lifting components 4, the lifting components 4 and the screens 3 are arranged one by one, and are respectively located below the corresponding screens 3, and the lifting components 4 are configured to periodically lift the corresponding screens 3; the water spraying mechanism is arranged on the screening box 2, and is configured to spray water from top to bottom to wash the material.

[0030] Specifically in this embodiment, Figure 6 As shown, the screening box 2 is configured as a box structure with an open top and rear side wall, and the screening box 2 is tilted to form a left-high and right-low placement form; to facilitate the installation of the screening box 2, the multi-layer water screen screening machine is configured to also include a frame 1, and the screening box 2 is configured to be installed on the top of the frame 1 during installation; to avoid splashing of materials during the screening process, such as Figure 1As shown, a cover 24 is installed on the top of the screening box 2, and a feed port 2401 is opened on the front top of the cover 24. The feed port 2401 is used to feed materials from the position at the top of the screen 3 into the screening box 2.

[0031] For example, the number of screens 3 is two. Figure 3 As shown, the two screens 3 are arranged in a form of left high and right low, and the screen 3 is set as a mesh deformable structure; in order to facilitate the installation of the screen 3, as shown Figure 3 and Figure 4 As shown, four mounting grooves 201 are symmetrically opened on the left and right inner walls of the screening box 2. The mounting grooves 201 are inclined and higher on the left and lower on the right. The two mounting grooves 201 located on the same inner wall are spaced apart in the vertical direction. When installing, the screen 3 is arranged so that the left and right ends are movably inserted into the two mounting grooves 201 located at the same height on the left and right inner walls of the screening box 2 respectively; the lifting mechanism is arranged to include two lifting components 4, and the two lifting components 4 are respectively arranged corresponding to the two screens 3 and are located below the corresponding screens 3.

[0032] In order to facilitate the elastic connection between the screen 3 and the screening box 2, the multi-layer water screen screening machine is configured to further include four tension springs 27, which are divided into two groups and are all inserted into the installation groove 201. Figure 3 and Figure 5 As shown, two tension springs 27 of the same group are respectively connected to the left and right ends of the same screen 3, wherein the end of the tension spring 27 on the left side away from the screen 3 is connected to the left inner wall surface of the screening box 2, and the end of the tension spring 27 on the right side away from the screen 3 is connected to the right inner wall surface of the mounting groove 201; the setting of the tension spring 27 enables the screen 3 to always be in a tensioned state, thereby avoiding the deformation of the screen holes and affecting the screening effect.

[0033] To facilitate material placement, Figure 1 and Figure 3As shown, inside the screening box 2, a first discharge plate 21, a second discharge plate 22 and a collecting plate 23 are obliquely inserted on the right side, and the first discharge plate 21 and the second discharge plate 22 are both arranged as U-shaped structures, and the openings are arranged upward when in use, wherein the first discharge plate 21 is connected to the end of the screen 3 located above, so as to receive the material screened by the screen 3 located above, and a first discharge port 211 is formed on the first discharge plate 21, and the first discharge port 211 is used to discharge the material on the screen 3 located above; the second discharge plate 22 and the screen located below are connected to each other. The end of 3 is connected to each other so as to receive the material screened by the screen 3 located below, and a second discharge port 221 is formed on the second discharge plate 22, and the second discharge port 221 is used to discharge the material screened by the screen 3 located below; the collecting plate 23 is set as an "eight"-shaped structure, and is installed on the bottom inner wall of the screening box 2, and the small opening is set to the right, and the collecting plate 23 is used to gather the material screened by the screen 3 below, and a third discharge port 231 is formed on the collecting plate 23, and the third discharge port 231 is used to discharge the material screened by the screen 3 located below.

[0034] The water spray mechanism is configured to include a water tank, a water pump and a water inlet pipe 25, wherein the water tank contains water with a preset liquid level; Figure 3 As shown, the water inlet pipe 25 is fixedly installed on the top of the cover 24, and the length direction of the water inlet pipe 25 extends obliquely in the lower right direction, so that the water discharged from the water inlet pipe 25 initially has a tendency to move in the lower right direction, thereby better driving the movement of materials and reducing kinetic energy loss; the pumping end of the water pump is connected to the water tank, and the discharge end of the water pump is connected to the water inlet pipe 25.

[0035] It is understandable that, in order to improve the overall flow effect of the material, the number of water inlet pipes 25 can be provided in plurality, and the plurality of water inlet pipes 25 are arranged on the cover 24 at intervals along the width direction of the cover 24, so that the water sprayed from the plurality of water inlet pipes 25 can drive all the materials on the cross section of the screen 3 to move; for example, Figure 2 As shown, there may be five water inlet pipes 25 , which are arranged at equal intervals along the width direction of the cover 24 .

[0036] It can be understood that in order to further improve the overall flow effect of the material, the number of water inlet pipes 25 can be set in multiple groups, and the multiple groups are arranged on the cover 24 at intervals along the length direction of the cover 24. Each group includes multiple water inlet pipes 25, and the multiple water inlet pipes 25 in the same group are arranged at intervals along the width direction of the cover 24; for example, Figure 2 As shown, the water inlet pipes 25 can be provided in two groups, and the two groups are arranged at intervals along the length direction of the cover 24, and each group includes five water inlet pipes 25.

[0037] During the screening process, firstly, the material is continuously put into the screening box 2 from the feed port 2401, and at the same time, the water pump and the jacking mechanism are started, and the water pump continuously sprays the water in the water tank through the water inlet pipe 25. Under the guiding effect of the inclined surface of the screen 3 and the impact of the water flow, the material can move from top to bottom along the screen 3; during the movement of the material, the large-sized material remains on the screen 3 located above and is discharged from the first discharge port 211, and the medium-sized and small-sized materials first pass through the screen 3 located above, wherein Medium-sized materials remain on the screen 3 located below and are discharged from the second discharge port 221, while small-sized materials pass through the screen 3 located below and fall to the bottom of the screening box 2 and are discharged from the third discharge port 231; the lifting mechanism can periodically lift the screen 3, which can not only cause a fault in the material and increase the residence time of the material on the screen 3, but also cause the screen 3 to vibrate, thereby reducing the blockage of the screen holes, improving the screening effect, and helping to reduce the subsequent repeated screening process and improve the screening efficiency.

[0038] In some embodiments, the lifting assembly 4 is configured to include a horizontally arranged rotating shaft 41, and the axis of the rotating shaft 41 is arranged perpendicular to the material conveying direction; a cam 42 is sleeved on the rotating shaft 41; the rotating shaft 41 can rotate on itself to synchronously drive the cam 42 to rotate around its own large end axis; when the cam 42 rotates, its own small end can periodically lift up the screen 3.

[0039] Specifically in this embodiment, in order to facilitate the installation of the rotating shaft 41, as shown in FIG. Fig.11 and Fig.14 As shown, mounting holes 202 are symmetrically provided on the left and right side walls of the screening box 2. The rotating shaft 41 is arranged so that one end can be rotatably inserted in one of the mounting holes 202, and the other end can be rotatably inserted in the other mounting hole 202 during installation. In order to facilitate the provision of driving force for the rotation of the rotating shaft 41, the multi-layer water screen screening machine is arranged to also include a first driving motor, which is installed on the outside of the screening box 2, and the motor shaft of the first driving motor is coaxially and fixedly connected to the rotating shaft 41.

[0040] When in use, the first drive motor is started, and the first drive motor drives the cam 42 to rotate through the rotating shaft 41. When the cam 42 rotates, its small end can periodically lift up the screen 3.

[0041] In a further embodiment, there are multiple cams 42 sleeved on the rotating shaft 41 , and adjacent cams 42 are staggered by 180 degrees.

[0042] Specifically in this embodiment, for example, the number of cams 42 sleeved on each rotating shaft 41 is two. Fig.11 As shown, the small ends of the two cams 42 on the same rotating shaft 41 are arranged opposite to each other.

[0043] During the rotation of the rotating shaft 41, when the small end of the left cam 42 faces upward, the small end of the right cam 42 faces downward, so that the screen 3 located in the same horizontal direction forms a wave shape with high on the left and low on the right. When the small end of the left cam 42 faces downward, the small end of the right cam 42 faces upward, so that the screen 3 located in the same horizontal direction forms a wave shape with low on the left and high on the right, wherein the material located at the crest of the wave can move to the trough of the wave, and by driving the material to move in the horizontal direction, while improving the uniformity of material distribution, the utilization rate of the screen 3 can be effectively improved, and by increasing the stroke of the material on the screen 3, the residence time of the material on the screen 3 can be further increased, thereby further improving the screening effect.

[0044] In a further embodiment, the number of rotating shafts 41 of the same lifting assembly 4 is even, and the rotating shafts 41 of the same lifting assembly 4 are grouped in pairs, and the rotating shafts 41 of different groups are arranged at intervals along the material conveying direction. The two rotating shafts 41 of the same group are arranged close to each other and rotate in opposite directions, and the two cams 42 corresponding to the material conveying direction are staggered by 180 degrees.

[0045] Specifically in this embodiment, for example, the number of rotating shafts 41 of the same jacking assembly 4 is four. Figure 3 As shown, the rotating shaft 41 of the same lifting assembly 4 is divided into two groups, such as Fig.11 As shown, the large ends of the cams 42 on the same side of the two rotating shafts 41 of the same group are arranged opposite to each other.

[0046] When in use, the cams 42 on the two rotating shafts 41 of the same group can further increase the area of ​​the screen 3 that is lifted up, thereby increasing the area of ​​the fault and further increasing the residence time of the material on the screen 3 on the one hand, and further increasing the vibration intensity of the screen 3 on the other hand, thereby improving the screening effect while reducing material accumulation.

[0047] In a further embodiment, two cams 42 of adjacent groups located on the same side of the rotating shaft 41 are staggered by 180 degrees.

[0048] Specifically in this embodiment, Fig.11 and Fig.12 As shown, the large ends of the two cams 42 on the two rotating shafts 41 on the upper left side are arranged opposite to each other, and the small ends of the two cams 42 on the two rotating shafts 41 on the lower left side are arranged opposite to each other.

[0049] During the rotation of the rotating shaft 41, when the small ends of the cams 42 on the two rotating shafts 41 on the upper left side face upward, the small ends of the cams 42 on the two rotating shafts 41 on the lower left side face downward, so that the screen 3 along the material conveying direction forms a wave shape with high top and low bottom. When the small ends of the cams 42 on the two rotating shafts 41 on the upper left side face downward, the small ends of the cams 42 on the two rotating shafts 41 on the lower left side face upward, so that the screen 3 along the material conveying direction forms a wave shape with low top and high bottom, wherein the material at the crest of the wave can move to the trough of the wave, thereby further increasing the stroke of the material on the screen 3, further increasing the residence time of the material on the screen 3, and further improving the screening effect.

[0050] In other embodiments, in order to facilitate the opposite rotation directions of the two rotating shafts 41 of the same group, the multi-layer water screen screening machine is configured to further include a plurality of drive assemblies, and the drive assemblies are correspondingly arranged with the two rotating shafts 41 of the same group, and each drive assembly includes a second drive motor 43, a first gear 44 and a second gear 45. Figure 7 and Fig.12 As shown, the second drive motor 43 is installed on the outside of the screening box 2, the motor shaft of the second drive motor 43 is coaxially and fixedly connected to the end of the rotating shaft 41 located on the right side, the first gear 44 is fixedly sleeved on the rotating shaft 41 located on the right side, the second gear 45 is fixedly sleeved on the rotating shaft 41 located on the left side, and the second gear 45 and the first gear 44 are meshed.

[0051] When in use, the second drive motor 43 is started, and the second drive motor 43 drives one of the rotating shafts 41 of the same group to rotate. During the rotation of the rotating shaft 41, it synchronously drives the other rotating shaft 41 of the same group to rotate in the opposite direction through the engagement between the first gear 44 and the second gear 45.

[0052] In other embodiments, the cam 42 can slide elastically on the rotating shaft 41; there are two cams 42 sleeved on each rotating shaft 41; the multi-layer water screen screening machine is configured to also include a moving mechanism 5, and the moving mechanism 5 is configured to drive the cam 42 to slide on the rotating shaft 41 when the cam 42 rotates.

[0053] Specifically in this embodiment, Fig.12As shown, a fixing groove is provided on the rotating shaft 41, and the fixing groove extends in a direction parallel to the axis of the rotating shaft 41. A fixing strip 411 is inserted in the fixing groove. The cam 42 is arranged to be simultaneously sleeved on the outside of the rotating shaft 41 and the fixing strip 411 during installation. Under the restriction of the fixing strip 411, the cam 42 can both rotate synchronously with the rotating shaft 41 and slide along the axial direction of the rotating shaft 41; a compression spring 46 is sleeved on each rotating shaft 41, and the compression spring 46 is located between the two cams 42 on the same rotating shaft 41. Under the action of the compression spring 46, the two cams 42 on the same rotating shaft 41 have a tendency to move away from each other, so that they can be pushed on the left or right inner wall of the screening box 2.

[0054] During the rotation of the rotating shaft 41 , the cam 42 can move while rotating under the action of the moving mechanism 5 , thereby further improving the vibration intensity of the screen 3 , reducing material accumulation and improving the screening effect.

[0055] In a further embodiment, the moving mechanism 5 is configured to include multiple moving components, and the moving components and the cams 42 are arranged in a one-to-one correspondence. Each moving component includes a protrusion 51 and a groove 52. The protrusion 51 is fixedly set on the screening box 2; the groove 52 is opened on the end face of the cam 42, and the groove 52 can be engaged with the protrusion 51.

[0056] Specifically in this embodiment, the number of cams 42 can be set to sixteen, and the number of moving components is set to sixteen; Fig.12 As shown, the groove 52 is vertically opened on the large end face of the cam 42 located on the outside, and the cross section is set to be circular; Fig.14 As shown, the protrusion 51 is fixedly arranged on the left or right side wall of the screening box 2, and is arranged close to the mounting hole 202, and is arranged in a hemispherical shape.

[0057] During the rotation of the rotating shaft 41, when the surfaces of the protrusion 51 and the cam 42 abut against each other, the cam 42 is set away from the inner wall of the screening box 2. When the protrusion 51 and the groove 52 are engaged, the cam 42 can abut against the inner wall of the screening box 2 under the action of the compression spring 46, so that the cam 42 can rotate and move at the same time.

[0058] In a further embodiment, in order to increase the movement frequency of the cam 42 , each moving component has a plurality of grooves 52 , which are arranged along the circumferential direction.

[0059] Specifically in this embodiment, Fig.12 As shown, the number of grooves 52 of each moving component can be set to six, and the six grooves 52 of the same moving component are evenly arranged along the circumferential direction.

[0060] During one rotation of the rotating shaft 41, the same protrusion 51 can engage with the groove 52 on the same cam 42 six times. Under the action of the compression spring 46, the cam 42 can reciprocate six times along the axial direction of the rotating shaft 41, thereby further improving the vibration intensity of the screen 3 and improving the screening effect.

[0061] In other embodiments, a protrusion 421 is provided on the small end of the cam 42 , and the protrusion 421 is configured to increase the friction between the cam 42 and the screen 3 .

[0062] Specifically in this embodiment, Fig.13 As shown, the protrusion 421 is configured as a columnar structure, and a plurality of protrusions 421 are configured, and the plurality of protrusions 421 are vertically and evenly spaced at the small end of the cam 42 along the axial direction of the cam 42 .

[0063] When in use, the protrusions 421 on the two cams 42 on the same side of the two rotating shafts 41 of the same group can simultaneously clamp the screen 3 and move it downward, thereby avoiding the vibration effect of the screen 3 caused by slipping.

[0064] In other embodiments, the screened material can only be discharged at a fixed point, causing it to occupy a large number of sieve holes, affecting both the screening effect and the screening efficiency. To solve this problem, the multi-layer water screen screening machine is configured to also include a material collecting mechanism 6, which is configured to collect the material on the screen 3 when the small ends of the two cams 42 corresponding to the material conveying direction on the two rotating shafts 41 of the same group are opposite.

[0065] Specifically in this embodiment, the material receiving mechanism 6 is configured to include a material receiving hole 61 and a material receiving frame 62. Fig.14 As shown, the receiving hole 61 is set to an inverted "Ω" shape structure and is opened on the left or right side wall of the screening box 2; the number of the receiving holes 61 is set to eight, and they are arranged in groups of two, and the two receiving holes 61 in the same group and the two rotating shafts 41 in the same group are correspondingly arranged and symmetrically opened on the left and right side walls of the screening box 2; Figure 6 As shown, the material receiving frame 62 is tilted and fixedly arranged on the left or right outer wall of the screening box 2, and is placed in a manner of being high in the front and low in the back, and the rear end and the top of the material receiving frame 62 are both open. There are four material receiving frames 62, which are evenly divided into two groups. Two of the same group are symmetrically arranged on the left and right outer walls of the screening box 2, and are also arranged corresponding to the rotating shafts 41 of all groups of the same screening component.

[0066] During the rotation of the rotating shaft 41, when the small ends of the two cams 42 corresponding to the material conveying direction on the two rotating shafts 41 of the same group face each other, as shown in FIG. Fig.10As shown, the corresponding screen 3 forms a U-shaped material pocket, and the large ends of the other two cams 42 in the horizontal direction are arranged relatively to each other, so that the corresponding screen 3 remains in an expanded state, and the screen 3 located in the same horizontal direction forms a high and low wave shape, wherein the material at the crest can move to the trough and enter the material receiving frame 62 from the material receiving hole 61, thereby reducing the occupation of the screen 3 by the screened material, which is conducive to further improving the screening efficiency.

[0067] In other embodiments, in order to facilitate the inspection and repair of the interior of the screening box 2, as shown in FIG. Figure 1 As shown, two openings (not shown) are provided on the top of the cover 24, and an inspection plate 241 is provided at each opening. The inspection plate 241 can be opened to facilitate visual inspection of the interior of the screening box 2 through the opening.

[0068] In other embodiments, to avoid excessive deformation of the screen 3, as Figure 3 and Figure 4 As shown, a plurality of elastic telescopic rods 26 are inserted into each installation groove 201, and the plurality of elastic telescopic rods 26 are arranged at equal intervals along the extension direction of the installation groove 201, and the fixed ends of the elastic telescopic rods 26 are vertically and fixedly connected to the top inner wall of the installation groove 201, and the movable ends of the elastic telescopic rods 26 are vertically abutted against the screen 3.

[0069] 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.

[0070] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A multi-layer water screen screening machine, characterized in that: The multi-layer water screen screening machine comprises: Screening box; A screen is obliquely inserted in the screening box, and the two ends of the screen along the material conveying direction are elastically connected to the screening box; there are multiple screens, and the multiple screens are arranged in parallel and at intervals along the vertical direction; A lifting mechanism is inserted into the screening box and includes a plurality of lifting components, wherein the lifting components are arranged in a one-to-one correspondence with the screens and are respectively located below the corresponding screens, and the lifting components are configured to periodically lift the corresponding screens; The water spraying mechanism is arranged on the screening box and is configured to spray water from top to bottom to wash the materials.

2. The multi-layer water screen screening machine according to claim 1, characterized in that: The lifting assembly includes a horizontally arranged rotating shaft, and the axis of the rotating shaft is arranged perpendicular to the material conveying direction; a cam is sleeved on the rotating shaft; the rotating shaft can rotate to synchronously drive the cam to rotate around its own large end axis; when the cam rotates, its own small end can periodically lift up the screen.

3. The multi-layer water screen screening machine according to claim 2, characterized in that: There are a plurality of cams sleeved on the rotating shaft, and adjacent cams are staggered by 180 degrees.

4. The multi-layer water screen screening machine according to claim 3, characterized in that: The number of rotating shafts of the same lifting assembly is even, and the rotating shafts of the same lifting assembly are grouped in pairs. The rotating shafts of different groups are arranged at intervals along the material conveying direction. The two rotating shafts of the same group are arranged close to each other and rotate in opposite directions, and the two cams corresponding to the material conveying direction are staggered by 180 degrees.

5. The multi-layer water screen screening machine according to claim 4, characterized in that: The two cams of adjacent groups located on the rotating shaft on the same side are staggered by 180 degrees.

6. The multi-layer water screen screening machine according to claim 4, characterized in that: The cam can slide elastically on the rotating shaft; there are two cams sleeved on each rotating shaft; the multi-layer water screen screening machine also includes a moving mechanism, which is configured to drive the cam to slide on the rotating shaft when the cam rotates.

7. The multi-layer water screen screening machine according to claim 6, characterized in that: The moving mechanism includes a plurality of moving components, and the moving components and the cams are arranged in a one-to-one correspondence. Each of the moving components includes a protrusion and a groove. The protrusion is fixedly arranged on the screening box; the groove is opened on the end face of the cam, and the groove can be engaged with the protrusion.

8. The multi-layer water screen screening machine according to claim 7, characterized in that: Each of the moving components has a plurality of grooves, which are arranged along the circumferential direction.

9. The multi-layer water screen screening machine according to claim 6, characterized in that: A protrusion is arranged on the small end of the cam, and the protrusion is configured to increase the friction between the cam and the screen.

10. The multi-layer water screen screening machine according to claim 4, characterized in that: The multi-layer water screen screening machine also includes a material collecting mechanism, which is configured to collect the material on the screen when the small ends of the two cams corresponding to the material conveying direction on the two rotating shafts of the same group are opposite to each other.

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