A high-frequency vibrating screen for fine material

Abstract

The present application relates to a kind of high-frequency vibrating screen for fine material, including the screen box with the screen cloth of internal movable connection, the lower end of screen cloth is provided with multiple screen cloth frame, therefore, by the movable connection between screen cloth and screen box, it can be realized that screen cloth and screen box relative motion when screen cloth frame is relative to screen cloth up and down movement and hit screen cloth, utilize the relative motion of screen cloth can realize screening process, also can keep screen box still, to reduce energy consumption, reduce the requirement to the overall structure strength of device, simultaneously, multiple screen cloth frame hit screen cloth simultaneously also can multiple force source make screen cloth vibration frequency higher, more conducive to the screening process of fine material. Specifically, the left and right ends of each screen cloth frame are fixedly connected with an up-down axial vibration motor respectively by transmission shaft, transmission shaft is movably connected with screen box to realize the purpose of using vibration motor to drive screen cloth frame up and down movement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-frequency vibrating screen, in particular to a high-frequency vibrating screen for fine particle materials. BACKGROUND

[0002] The high-frequency vibrating screen is a large mechanical equipment that realizes the screening process of different particle sizes by the relative movement between the screen and the material, so that the material and the screen can collide with each other to pass through the screen hole on the screen.

[0003] In the prior art device, the high-frequency vibrating screen generally includes a support, a screen box is arranged at the upper end of the support, the lower end of the screen box is fixedly connected with the support through a spring, and a vibrating motor is further fixedly connected to the outer side wall of the screen box (the vibrating motor is generally fixed to the lower end of the screen box or the upper end of the screen box). Therefore, the vibrating motor can drive the screen box and the screen in the screen box to move relative to the support through the movable connection between the spring and the support.

[0004] It should be noted that, in the prior art device, the vibrating motor drives the whole screen box to move, so the power value of the vibrating motor must be relatively high, which makes the overall energy consumption high. In addition, the screen box moves up and down continuously in the actual working process, which requires the screen box to have high mechanical strength to meet the impact resistance performance. The higher the vibration frequency, the higher the requirement for the impact resistance performance of the screen box, which makes it difficult for the prior art device to meet the high-frequency vibration required in the fine particle screening process. The prior art device is difficult to complete the screening of fine particle materials below 3mm at one time.

[0005] Therefore, we believe that a high-frequency vibrating screen is needed that can reduce energy consumption, improve vibration frequency, and reduce overall cost. SUMMARY

[0006] In view of the shortcomings of the prior art, the present application provides a high-frequency vibrating screen for fine particle materials, which has the advantages of high vibration frequency, low energy consumption, low manufacturing and maintenance cost, and solves the problems of low vibration frequency and high energy consumption caused by the synchronous vibration of the screen box and the screen in the prior art device

[0007] To achieve the above purpose, the present application adopts the following technical scheme:

[0008] The utility model provides a high frequency vibration screen for fine particle material, including sieve box, the inside movable joint has screen cloth in sieve box, and screen cloth lower end is provided with a plurality of vibration screen frame, a plurality of vibration screen frame equidistance arrangement along screen cloth length direction, every vibration screen frame left and right two ends are fixedly connected with one left and right axial transmission shaft respectively, two transmission shafts far away from the end are fixedly connected with one vibration motor of central axis perpendicular with transmission shaft central axis, every transmission shaft outside coaxial sleeve is equipped with damping mechanism, and transmission shaft is movably connected with sieve box outside wall through damping mechanism, the sieve box is set up to avoid the groove for transmission shaft, and the groove diameter is bigger than transmission shaft diameter, and transmission shaft is inserted into the groove.

[0009] Preferably, the damping mechanism includes a positioning ring, the positioning ring is sleeved on the outside of the transmission shaft and fixedly connected with the transmission shaft, each positioning ring is sleeved with a fixed frame on the outside, the fixed frame is fixedly connected with the outside wall of the sieve box, and each positioning ring is fixedly connected with an energy-absorbing component on the left and right sides, wherein the energy-absorbing component on the left side of the positioning ring is fixedly connected with the fixed frame, and the energy-absorbing component on the right side of the positioning ring is fixedly connected with the outside wall of the sieve box.

[0010] Preferably, each energy-absorbing component includes a mounting ring, the mounting ring is fixedly connected with the side wall of the positioning ring, and the two mounting rings corresponding to a single positioning ring are fixedly connected with rubber rings on the sides away from each other, and the two rubber rings corresponding to a single positioning ring are fixedly connected with a fixed ring on the sides away from each other, each fixed ring is fixedly connected with the corresponding fixed frame and the corresponding outside wall of the sieve box, and the inner diameter of the fixed ring is greater than the diameter of the transmission shaft.

[0011] Preferably, the middle section of the positioning ring is a conical circular truncated cone structure, the middle sections of the mounting ring and the fixed ring are consistent with the structure of the positioning ring.

[0012] Preferably, two tensioning shaft sleeves are arranged side by side on the outside of each transmission shaft from left to right, wherein the tensioning shaft sleeve on the side close to the sieve box is inserted into the inner cavity of the positioning ring, and the tensioning shaft sleeve on the side away from the sieve box is provided with a motor base outside the sleeve, and the transmission shaft is fixedly connected with the vibration motor through the motor base.

[0013] Preferably, two screen meshes are arranged on the inside of the sieve box, a partition plate is fixedly connected between the plurality of vibration screen frames at the lower end of each screen mesh, and the plurality of vibration screen frames at the lower end of each screen mesh maintain the same movement trend through the partition plate.

[0014] Preferably, each of the screen upper sides is provided with an elastic mechanism, the screen is movably connected with the screen box through the elastic mechanism, each of the elastic mechanisms comprises a limiting beam fixedly connected with the screen box below the screen, a plurality of fixed plates are arranged side by side on the upper side of the limiting beam from left to right, a through hole is formed through each of the fixed plates, a movable rod is inserted into the through hole, an installation plate is fixedly connected with each of the movable rods on the side close to the screen, the installation plate is located on the side of the fixed plate close to the screen, the installation plate is rotatably connected with the screen, a compression spring is sleeved outside each of the movable rods, and the compression spring is located on the side of the fixed plate away from the screen, and one axial end of the compression spring abuts against the fixed plate, and the other axial end of the compression spring is movably connected with the movable rod.

[0015] Preferably, a limiting plate is sleeved outside the side of each of the movable rods away from the screen, one axial end of the compression spring abuts against the limiting plate, an external thread is formed on the side of each of the movable rods away from the screen, and a limiting nut is screwed with the movable rod through the external thread, and the limiting nut is located on the side of the limiting plate away from the screen.

[0016] Preferably, a fixed mechanism is rotatably connected with each of the upper and lower sides of each of the screens, the fixed mechanism on the upper side of the screen is fixedly connected with the installation plate, and the fixed mechanism on the lower side of the screen is fixedly connected with the screen box, each of the fixed mechanisms comprises a connecting piece fixedly connected with the corresponding installation plate and the inner side wall of the screen box, a limiting piece is movably connected with each of the connecting pieces on the side close to the screen, the side close to the screen of the limiting piece is of a hook-shaped structure, the limiting piece is rotatably connected with the screen through the hook-shaped structure, a U-shaped groove I with the opening facing away from the screen is formed on the side of each of the limiting pieces close to the connecting piece, a U-shaped groove II facing the screen is formed on the side of each of the connecting pieces close to the corresponding limiting piece, and each of the connecting pieces and the corresponding limiting piece are arranged in the form that the U-shaped groove I and the U-shaped groove II are nested and inserted with each other.

[0017] Compared with the prior art, the present application has the beneficial effects that:

[0018] The present application drives the screen frame to make an arc fluctuation through the vibration motor, sets a plurality of screen frames below a single screen, so that the single screen can be continuously hit by the plurality of screen frames during actual use, which can make the screen vibration frequency higher through the form of reducing the amplitude, and the vibration intensity can reach 8-10 times of the gravity acceleration, and is more helpful for the screening process of fine particles, and can effectively screen the materials with a size of 0.1-3 mm.

[0019] This invention differs from traditional devices in that the screen and screen box are separated during actual use. The screening process can be achieved simply by using a vibrating motor to drive the vibrating screen frame. Compared to traditional devices, this device consumes less energy; the vibrating motor power can be 0.15-0.25 kW, and even the total power of a double-layer vibrating screen does not exceed 2.5 kW. Furthermore, since the screen box does not need to move, the overall structural strength requirements of the device are lower. Moreover, as the screen box serves as the outer shell, its stationary position prevents injury to surrounding personnel due to improper operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram showing the positional relationship between the vibrating screen frame and the screen box of the present invention;

[0022] Figure 3 This is a schematic diagram showing the connection between the vibrating mesh frame and the vibrating motor of the present invention;

[0023] Figure 4 This is a schematic diagram showing the positional relationship between the vibration motor and the shock absorption mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the energy-absorbing component and the positioning ring of the present invention.

[0025] Figure 6 This is a schematic diagram of the fit between the drive shaft and the tensioning bushing of the present invention;

[0026] Figure 7 This is a schematic diagram of the overall structure of the tensioning bushing of the present invention;

[0027] Figure 8 This is a schematic diagram showing the connection between the fixing mechanism and the screen of the present invention;

[0028] Figure 9 This is a schematic diagram of the overall structure of the elastic mechanism of the present invention.

[0029] In the diagram: 1. Screen box; 2. Vibrating motor; 3. Screen mesh; 4. Vibrating mesh frame; 5. Middle partition plate; 6. Fixed frame; 7. Motor base; 8. Drive shaft; 9. Shock absorption mechanism; 901. Energy absorption component; 9011. Fixed ring; 9012. Rubber ring; 9013. Mounting ring; 902. Positioning ring; 10. Tensioning bushing; 11. Elastic mechanism; 1101. Limiting plate; 1102. Fixed plate; 1103. Compression spring; 1104. Movable rod; 1105. Mounting plate; 12. Fixed mechanism; 1201. Limiting component; 1202. Connecting component; 1203. U-shaped groove II; 1204. U-shaped groove I. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0032] Please refer to Figures 1-9 A high-frequency vibrating screen for fine-particle materials includes a screen box 1, as shown in the figure. The screen box 1 includes two wall panels arranged on the left and right, and multiple steel pipe beams between the two wall panels. The steel pipe beams connect the two wall panels into one piece, forming a screen box 1 with an open structure on the upper side.

[0033] The screen box 1 is equipped with a screen 3 with multiple screen holes. A vibrating frame 4 is installed at the lower end of the screen 3. The vibrating frame bounces up and down and hits the screen 3, thereby making the screen 3 bounce up and down. In practice, the up and down bouncing of the screen 3 separates fine particles from large particles. The fine particles fall through the screen holes to the bottom of the screen 3, while the large particles remain above the screen 3 and roll down to the discharge port of the screen box 1 by gravity.

[0034] Furthermore, this device has two screens 3 installed inside the screen box 1, one above the other. The presence of the two screens can gradually separate the product to be processed into the expected fine powder, resulting in higher processing efficiency and less waste.

[0035] Specifically, this device constrains the screen 3 to be movably connected to the screen box 1. This allows the screen 3 to move relative to the screen box 1, thereby achieving the purpose of screening materials while the screen box 1 remains stationary.

[0036] Specifically, the device has an elastic mechanism 11 rotatably connected to the upper end of the screen 3. The elastic mechanism 11 not only allows the screen 3 to move, but also provides the power for the screen 3 to reset, ensuring that the screen 3 can withstand multiple impacts from the vibrating screen frame 4 during use, thereby increasing the vibration frequency of the screen 3.

[0037] The elastic mechanism 11 includes a limiting beam, the left and right end faces of which are fixedly connected to the inner side walls of the two wall panels of the screen box 1, respectively.

[0038] Multiple fixing plates 1102 are fixedly connected to the upper end of the limiting beam. Each fixing plate 1102 has a through hole, and a movable rod 1104 is inserted into the through hole. That is, the movable rod 1104 is slidably connected to the fixing plate 1102 through the through hole.

[0039] The movable rod 1104 is fixedly connected to the mounting plate 1101 on the side near the screen 3. The mounting plate 1101 is located on the side of the fixed plate 1102 near the screen 3. This can limit the movable rod 1104 by using the mounting plate 1101 to prevent the movable rod 1104 from moving excessively away from the screen 3, which would cause the screen 3 to be overstretched and reduce its service life.

[0040] Specifically, this device has a compression spring 1103 sleeved on the outside of the movable rod 1104, and a limiting plate sleeved on the side of the movable rod 1104 away from the screen 3. By constraining the compression spring 1103 to be located on the side of the fixed plate 1102 away from the screen 3, and with one axial end of the compression spring 1103 abutting against the fixed plate 1102 and the other axial end of the compression spring 1103 abutting against the limiting plate, in practice, it is only necessary to constrain the limiting plate to prevent it from moving away from the screen 3 to ensure that the compression spring 1103 can function normally. When the movable rod 1104 moves towards the screen 3 due to the movement of the screen 3, the compression spring 1103 accumulates elastic potential energy due to the influence of the limiting plate, thereby using the compression spring 1103 to provide a reset force for the movable rod 1104, so that the compression spring 1103 has a tendency to move away from the screen 3.

[0041] Specifically, the limiting plate is rotatably connected to the screen 3. When the screen 3 is deformed upward due to the influence of the vibrating screen frame 4, and the movable rod 1104 is pulled towards the screen 3, the compression spring 1103 can provide the screen 3 with the power to reset, forcing the screen 3 to move downward and deform to reset.

[0042] Furthermore, the device has an external thread on the side of the movable rod 1104 away from the screen 3, and a limit nut 1105 is screwed into the external thread. The limit nut 1105 is located on the side of the limit plate away from the screen 3. At this time, the position of the limit plate can be constrained by the limit nut 1105 to ensure that the limit plate cannot move in the direction away from the screen 3.

[0043] Meanwhile, the limiting nut 1105 is screwed to the movable rod 1104. By rotating the limiting nut 1105, the distance between the limiting nut 1105 and the fixed plate 1102, i.e., between the limiting plate and the fixed plate 1102, can be changed. This, together with the compression spring 1103, can control the maximum stroke of the movable rod 1104 toward the screen 3, as well as the elastic potential energy accumulated by the compression spring 1103 under normal conditions. This can change the amplitude of the screen 3 and control the time required for the screen 3 to reset. Thus, the device can be flexibly adjusted according to the adhesion relationship between fine and large particles, making the device adaptable to different screening processes.

[0044] Furthermore, each screen 3 is rotatably connected to a fixing mechanism 12 on its lower side. The fixing mechanism 12 is fixedly connected to the steel pipe beam. This measure uses the fixing mechanism 12 to prevent the lower side of the screen 3 from changing position relative to the screen 3. By utilizing the deformation characteristics of the screen 3 itself, the screen 3 can be reset more quickly, ensuring that the vibrating frame 4 has more effective striking force on the screen 3.

[0045] Specifically, the fixing mechanism 12 includes a connector 1202 and a limiting member 1201. The lower end of the connector 1202 is fixedly connected to the steel pipe beam. The limiting member 1201 has a hook-shaped structure on the side near the screen 3. The rotational connection between the limiting member 1201 and the screen 3 is achieved by fitting the hook-shaped structure of the limiting member 1201 onto the screen 3.

[0046] Meanwhile, the limiting member 1201 has a U-shaped opening on the side near the connecting member 1202, with a U-shaped groove I 1204 facing away from the screen 3. The connecting member 1202 has a U-shaped groove II 1203 on the side near the corresponding limiting member 1201, facing the screen 3. By setting each connecting member 1202 and the corresponding limiting member 1201 to be nested and inserted into each other through the U-shaped groove I 1204 and the U-shaped groove II 1203, the tension of the limiting member 1201 during the extension of the screen 3 can be combined to ensure that the connecting member 1202 and the limiting member 1201 remain stable during actual use.

[0047] Meanwhile, the presence of U-shaped groove I 1204 and U-shaped groove II 1203, as well as the hook-shaped structure on the limiting member 1201, makes the connection between the limiting member 1201 and the connecting member 1202, and between the limiting member 1201 and the screen 3, detachable. This allows operators to easily replace and install the screen 3 as needed.

[0048] Furthermore, as shown in the figure, compared to the other components of this device, the limiting member 1201 and the connecting member 1202 are both thin plate parts, which can have a certain amount of elastic deformation. This makes it easier to connect them to the screen 3 during installation and keeps the screen 3 in an extended state.

[0049] It should be noted that each limiting plate is also provided with a fixing mechanism 12 on the side near the screen 3. The limiting plate is also rotatably connected to the screen 3 through the fixing mechanism 12. This rotatable connection can avoid the screen 3 from having a stroke conflict with the elastic mechanism 11 during the movement.

[0050] It should be noted that, in order to increase the vibration frequency of the screen 3, this device has multiple vibrating frames 4 on the underside of a single screen 3, and the multiple vibrating frames are arranged side by side from front to back. This allows a single screen 3 to be continuously struck by multiple vibrating frames 4 in practice, which can effectively increase the vibration frequency of the screen 3.

[0051] Specifically, in order to realize the vibration process of the vibrating screen frame 4, this device fixes a left-right axial transmission shaft 8 at each of the left and right ends of each vibrating screen frame 4. Vibration of any transmission shaft 8 can drive the vibrating screen frame 4 to vibrate.

[0052] Each of the two drive shafts 8 corresponding to a single vibrating mesh frame 4 is equipped with a vertically axially vibrating motor 2 at its far end. The vibrating motor 2 is fixedly connected to the drive shaft 8 through a motor base 7. When the vibrating motor 2 is working, it will drive the drive shaft 8 to vibrate, that is, the vibrating mesh frame 4 will follow the vibration.

[0053] Meanwhile, the two vibration motors 2 set on both sides of a single vibrating screen frame 4 can make the vibration frequency of the single vibrating screen frame 4 higher and the amplitude more irregular. This not only increases the vibration frequency of the screen 3, but also improves the screening efficiency through the irregular movement of the screen.

[0054] Specifically, a single vibrating screen frame 4 includes a central shaft in the left and right directions, and an I-shaped shaft is fixedly connected to each of the left and right sides of the central shaft. The larger upper surface of the I-shaped shaft can increase the contact area between the single vibrating screen frame 4 and the screen 3, thus avoiding excessive pressure from the vibrating screen frame 4 impacting the screen 3 and causing damage to the screen 3.

[0055] Furthermore, a central partition 5 is fixedly connected to the multiple vibrating screen frames 4 at the lower end of a single screen 3. The central partition 5 is located between the left and right I-shaped shafts and fixedly connected to the central shaft. Through the central partition 5, the multiple vibrating screen frames 4 at the lower end of a single screen 3 can maintain the same movement trend. That is, this allows multiple vibrating motors 2 to provide driving force to the multiple vibrating screen frames 4 on the lower side of the screen 3. This can further make the vibration frequency of the multiple vibrating screen frames 4 higher and the amplitude more irregular, thereby not only increasing the vibration frequency of the screen 3, but also improving the screening efficiency through the irregular movement of the screen.

[0056] Specifically, in order to avoid fine particles interfering with the operation of the vibrating motor 2, this device constrains the vibrating motor 2 to be located outside the screen box 1.

[0057] Therefore, in order to fix the vibrating motor 2, this device is equipped with a shock-absorbing mechanism 9 on the outside of each drive shaft 8. The shock-absorbing mechanism 9 realizes the movable connection between the drive shaft 8 and the screen box 1, and then uses the drive shaft 8 to realize the relative fixation of the vibrating motor 2 and the vibrating screen frame 4.

[0058] Specifically, the shock absorption mechanism 9 includes a fixed frame 6. The fixed frame 6 has an open structure on the side near the screen box 1, and the fixed frame 6 is fixedly connected to the outer wall of the screen box 1.

[0059] The fixed frame 6 has a positioning ring 902 inserted inside, which is oriented in the left and right directions. The positioning ring 902 is sleeved on the outside of the drive shaft 8 and is coaxially and fixedly connected to the drive shaft 8.

[0060] An energy-absorbing component 901 is fixedly connected to each of the left and right sides of the positioning ring 902. The energy-absorbing component 901 on the left side of the positioning ring 902 is fixedly connected to the fixed frame 6, and the energy-absorbing component 901 on the right side of the positioning ring 902 is fixedly connected to the outer wall of the screen box 1. This method of using two energy-absorbing components 901 to fix the fixed frame 6 and the screen box 1 respectively can help strengthen the stability of the connection between the screen box 1 and the fixed frame 6.

[0061] Specifically, the energy-absorbing component 901 includes a mounting ring 9013 fixedly connected to the positioning ring 902, and a fixing ring 9011 fixedly connected to the screen box 1 and the fixing frame 6. By using the rubber ring 9012 set between the mounting ring 9013 and the fixing ring 9011, the relative movement between the fixing ring 9011 and the mounting ring 9013, i.e., between the positioning ring 902 and the mounting frame, can be realized through the deformable properties of rubber. This ensures that the vibrating motor 2 can drive the transmission shaft 8 to move. Furthermore, the presence of the rubber ring 9012 enables the vibrating motor 2 to have an automatic reset effect during vibration, ensuring that the vibrating motor 2 and the vibrating screen frame 4 can only fluctuate up and down within a certain range.

[0062] Furthermore, to further constrain the range of motion of the drive shaft 8, this device limits the middle section of the positioning ring 902 to a conical frustum structure, and the middle sections of the mounting ring 9013 and the fixing ring 9011 have the same structure as the positioning ring 902. This ensures that when the positioning ring 902 and the mounting ring 9013 move relative to the fixing ring 9011, the positioning ring 902 and the mounting ring 9013 can only move within the conical cavity of the fixing ring 9011, and the positioning ring 902 and the mounting ring 9013 cannot break out of the conical cavity of the fixing ring 9011.

[0063] Meanwhile, the conical frustum structure in the middle section of the positioning ring 902 can increase the contact area between the positioning ring 902 and the drive shaft 8, thereby improving the stability of the device.

[0064] Furthermore, since this device is a large mechanical component, in order to facilitate the installation of various parts by the operator and to complete the connection process between the drive shaft 8 and the vibrating motor 2 and the positioning ring 902, this device has two tensioning bushings 10 arranged side by side from left to right on the outside of each drive shaft 8. The tensioning bushing 10 located on the side of the drive shaft 8 closer to the screen box 1 is inserted into the inner cavity of the positioning ring 902, and the tensioning bushing 10 located on the side of the drive shaft 8 away from the screen box 1 is inserted into the inside of the motor base 7. This measure utilizes the tensioning effect brought by the tensioning bushings 10 to facilitate the connection process between the drive shaft 8 and the positioning ring 902 and the motor base 7.

[0065] Specifically, as shown in the figure, the tensioning bushing 10 includes an inner ring sleeve and an outer ring sleeve. The inner ring sleeve is inserted into the outer ring sleeve. By constraining the inner ring sleeve into a conical frustum structure, the overall wall thickness of the tensioning bushing 10 can be changed by altering the length of the inner ring sleeve inserted into the outer ring sleeve, thereby achieving the tensioning effect.

[0066] In practical use, this invention:

[0067] First, the operator pours the material to be screened onto the upper screen 3. At this time, multiple vibrating motors 2 are started simultaneously.

[0068] Subsequently, multiple vibrating screen frames 4 located below the same screen 3 are simultaneously affected by multiple vibrating motors 2. The multiple vibrating screen frames 4 located below the same screen 3 synchronously perform irregular tapping on the screen 3. At this time, the screen 3 jumps up and down relative to the screen box 1 to achieve screening.

[0069] Then, as the screening process proceeds, some of the smaller diameter materials to be screened pass through the screen holes of the upper screen 3 and become intermediate materials. At this time, under the influence of gravity, the intermediate materials fall to the upper screen 3, and as the lower screen 3 jumps, some of the smaller diameter intermediate materials pass through the screen holes of the lower screen 3 and fall below to become finished materials.

[0070] Finally, due to the weight, the material above the two layers of screens 3 gradually rolls down and falls off the screens 3 as the body bounces, and the product left below the lower screen 3 is the finished product.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-frequency vibrating screen for fine-particle materials, characterized in that: Includes a sieve box (1), inside which a sieve mesh (3) is movably connected, and at the lower end of the sieve mesh (3) are multiple vibrating mesh frames (4), which are equidistantly arranged along the length of the sieve mesh (3); Each of the vibrating mesh frames (4) has a left-right axis drive shaft (8) fixedly connected to its left and right ends respectively, and a vibrating motor (2) with its central axis perpendicular to the central axis of the drive shaft (8) is fixedly connected to the far end of each of the two drive shafts (8); Each of the drive shafts (8) is coaxially fitted with a shock-absorbing mechanism (9) on its outer side, and the drive shaft (8) is movably connected to the outer wall of the sieve box (1) through the shock-absorbing mechanism (9); The sieve box (1) has a clearance groove for the drive shaft (8), the diameter of the clearance groove is larger than the diameter of the drive shaft (8), and the drive shaft (8) is inserted into the clearance groove; The shock absorption mechanism (9) includes a positioning ring (902), which is sleeved on the outside of the transmission shaft (8) and fixedly connected to the transmission shaft (8); Each of the positioning rings (902) is fitted with a fixed frame (6) on its outer side, and the fixed frame (6) is fixedly connected to the outer wall of the sieve box (1); Each of the positioning rings (902) has an energy-absorbing component (901) fixedly connected to its left and right sides respectively. The energy-absorbing component (901) located on the left side of the positioning ring (902) is fixedly connected to the fixed frame (6), and the energy-absorbing component (901) located on the right side of the positioning ring (902) is fixedly connected to the outer wall of the sieve box (1). Each of the energy-absorbing components (901) includes a mounting ring (9013), which is attached to the side wall of the positioning ring (902) and fixedly connected to the positioning ring (902). Rubber rings (9012) are fixedly connected to the two mounting rings (9013) corresponding to a single positioning ring (902) on the opposite side. A fixing ring (9011) is fixedly connected to the two rubber rings (9012) corresponding to a single positioning ring (902) on the opposite side. Each of the fixed rings (9011) is fixedly connected to the corresponding fixed frame (6) and the outer wall of the corresponding sieve box (1), and the inner diameter of the fixed ring (9011) is greater than the diameter of the drive shaft (8); The middle section of the positioning ring (902) is a conical frustum structure, and the middle sections of the mounting ring (9013) and the fixing ring (9011) have the same structure as the positioning ring (902). Two tensioning bushings (10) are fitted side by side from left to right on the outer side of each drive shaft (8). The tensioning bushing (10) located on the side of the drive shaft (8) closer to the screen box (1) is inserted into the inner cavity of the positioning ring (902). The tensioning bushing (10) located on the side of the drive shaft (8) away from the screen box (1) is fitted with a motor seat (7). The drive shaft (8) is fixedly connected to the vibration motor (2) through the motor seat (7).

2. The high-frequency vibrating screen for fine-particle materials according to claim 1, characterized in that: The screen box (1) has two screens (3) arranged inside, one above the other. A middle partition (5) is fixedly connected to the multiple vibrating screen frames (4) at the lower end of a single screen (3). The multiple vibrating screen frames (4) at the lower end of a single screen (3) maintain the same movement trend through the middle partition (5).

3. The high-frequency vibrating screen for fine-particle materials according to claim 1, characterized in that: Each of the screens (3) is provided with an elastic mechanism (11) on its upper side, and the screen (3) is movably connected to the screen box (1) through the elastic mechanism (11); Each of the elastic mechanisms (11) includes a limiting beam located below the screen (3) and fixedly connected to the screen box (1). Multiple fixing plates (1102) are arranged side by side from left to right on the upper side of the limiting beam. Each fixing plate (1102) has a through hole, and a movable rod (1104) is inserted into the through hole. Each of the movable rods (1104) is fixedly connected to a mounting plate (1101) on the side near the screen (3). The mounting plate (1101) is located on the side of the fixed plate (1102) near the screen (3). The mounting plate (1101) is rotatably connected to the screen (3). Each of the movable rods (1104) is fitted with a compression spring (1103) on its outer side. The compression spring (1103) is located on the side of the fixed plate (1102) away from the screen (3). One axial end of the compression spring (1103) abuts against the fixed plate (1102), and the other axial end of the compression spring (1103) is movably connected to the movable rod (1104).

4. The high-frequency vibrating screen for fine-particle materials according to claim 3, characterized in that: Each of the movable rods (1104) is fitted with a limiting plate on the side away from the screen (3), and the axial end of the compression spring (1103) abuts against the limiting plate; Each of the movable rods (1104) has an external thread on the side away from the screen (3), and the movable rod (1104) is screwed with a limit nut (1105) through the external thread. The limit nut (1105) is located on the side of the limit plate away from the screen (3).

5. A high-frequency vibrating screen for fine-particle materials according to claim 3, characterized in that: Each of the screens (3) is rotatably connected to a fixing mechanism (12) on its upper and lower sides respectively. The fixing mechanism (12) on the upper side of the screen (3) is fixedly connected to the mounting plate (1101), and the fixing mechanism (12) on the lower side of the screen (3) is fixedly connected to the screen box (1). Each of the fixing mechanisms (12) includes a connector (1202), which is fixedly connected to the corresponding mounting plate (1101) and the inner wall of the sieve box (1); Each of the connectors (1202) is movably connected to a limiting member (1201) on the side near the screen (3). The limiting member (1201) on the side near the screen (3) has a hook-shaped structure, and the limiting member (1201) is rotatably connected to the screen (3) through the hook-shaped structure. Each of the limiting members (1201) has a U-shaped opening on the side near the connecting member (1202) with a U-shaped groove I (1204) facing away from the screen (3), and each connecting member (1202) has a U-shaped groove II (1203) on the side near the corresponding limiting member (1201) facing the screen (3). Each connecting member (1202) and the corresponding limiting member (1201) are nested and inserted into each other through the U-shaped groove I (1204) and the U-shaped groove II (1203).

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