Vibrating screening unit and screening main body

Abstract

The invention provides a vibration screening unit and a screening body. The vibration screening unit comprises a vibration screen, a high-frequency vibration mechanism, a fixed beam, a first drag hook and a second drag hook. The vibrating screen is obliquely arranged, fixing beams are arranged at the two ends of the vibrating screen, a first drag hook is arranged on one fixing beam, and a second drag hook is arranged on the other fixing beam. A first hook part is arranged at one end of the vibrating screen, a second hook part is arranged at the other end of the vibrating screen, the first hook part is hooked on the first drag hook, and the second hook part is hooked on the second drag hook; the high-frequency vibration mechanism is arranged below the middle of the vibration screen, and the top of the high-frequency vibration mechanism abuts against the lower surface of the vibration screen to enable the vibration screen to be of an arch-shaped structure. The high-frequency vibrating screen has the advantages that the high-frequency vibrating mechanism can be used for driving the vibrating screen to vibrate at high frequency, so that the speed of the recycled asphalt mixture adhering to the screen is lower than the escape speed of the screen, and the recycled asphalt mixture can be prevented from adhering to meshes of the screen.

Description

[Technical field]

[0001] The invention relates to the technical field of recycled asphalt mixture screening, and in particular to a vibration screening unit and a screening body. [Background technology]

[0002] Recycled asphalt mixture refers to the mixture that is reused after the old asphalt pavement is dug up, recycled, crushed and screened. By recycling recycled asphalt mixture, a large amount of raw materials such as asphalt and sand and gravel can be saved, which has significant economic, social and environmental benefits.

[0003] After crushing, the recycled asphalt mixture usually needs to be screened into three to five specifications, and the more screening specifications, the higher the utilization rate of the recycled asphalt mixture. Because the recycled asphalt mixture contains asphalt, it becomes extremely difficult to screen fine aggregates below 5mm. The existing screening equipment has the following problems in the actual screening process: the mesh of the screen is easily blocked during the screening process, and the screen is inconvenient to disassemble and assemble; at the same time, the vibration screen cannot be tensioned and adjusted during use, and it is impossible to ensure that the vibration mechanism can drive the vibration screen to vibrate effectively. In view of the above-mentioned problems, the inventor of this case conducted an in-depth study on the problem, and thus this case was created. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a vibrating screening unit and a screening body, so as to solve the problems in the existing screening equipment that the screen holes are easily blocked during the actual screening process, and the screen is inconvenient to disassemble and assemble; the vibrating screen cannot be tensioned and adjusted during use, and it cannot be ensured that the vibration mechanism can drive the vibrating screen to vibrate effectively.

[0005] The present invention is achieved in that:

[0006] In a first aspect, a vibrating screening unit includes a vibrating screen, a high-frequency vibration mechanism, a fixed beam, a first hook, and a second hook;

[0007] The vibrating screen is arranged at an angle, and fixed beams are provided at both ends of the vibrating screen, one of the fixed beams is provided with a first hook, and the other fixed beam is provided with a second hook; a first hook is provided at one end of the vibrating screen, and a second hook is provided at the other end of the vibrating screen, the first hook is hooked on the first hook, and the second hook is hooked on the second hook; the high-frequency vibration mechanism is arranged below the middle of the vibrating screen, and the top of the high-frequency vibration mechanism abuts against the lower surface of the vibrating screen and makes the vibrating screen present a bow-shaped structure.

[0008] Furthermore, two high-frequency vibration mechanisms are arranged at the top of the middle part of the lower surface of the vibration screen.

[0009] Furthermore, the first hook and the second hook are both in plurality, and the first hook is a fixed hook, and the second hook is an adjustable hook.

[0010] Furthermore, the second pull hook includes a hook body, a movable rod, a locking nut and a fixed tube, and the fixed tube is fixed on the fixed beam; the movable rod passes through the interior of the fixed tube, one end of the movable rod is connected to the hook body, and the outer surface of the other end of the movable rod is provided with an external thread section, and the other end of the movable rod is locked by a locking nut.

[0011] Furthermore, the vibrating screen includes an elastic outer frame and a plurality of transverse ribs and a plurality of longitudinal ribs woven in the elastic outer frame; the transverse ribs are corrugated steel wires, and at least one longitudinal rib is woven at every 3 to 5 wave peaks on the transverse ribs; the screen area formed by weaving the transverse ribs and the longitudinal ribs does not cover the area where the fixed beam is located.

[0012] Furthermore, the high-frequency vibration mechanism includes a vibration beam, an elastic vibration bar, a high-frequency vibration motor, a shock absorber, a material flow detector, a PLC control unit and a frequency conversion controller;

[0013] Shock absorbers are provided at both ends of the vibration beam, and the high-frequency vibration motor is provided at the bottom of the vibration beam; a mounting structure is provided at the top of the vibration beam, and elastic vibration strips are provided on both sides of the mounting structure, and the top of the elastic vibration strips abuts against the lower surface of the vibration screen; a material flow detector is provided on the upper and lower surfaces of the vibration screen, and the material flow detector is connected to the PLC control unit, and the PLC control unit is connected to the frequency conversion controller, and the frequency conversion controller is connected to the high-frequency vibration motor; the vibration frequency of the high-frequency vibration motor is 30-100 Hz, and the amplitude is 0.3-1.5 mm, and the PLC control unit controls the frequency conversion controller to output the required vibration frequency to the high-frequency vibration motor according to the material flow detected by the material flow detector;

[0014] Among the endpoints at both ends of the top surface of the vibration screen and the contact points between each elastic vibration strip and the lower surface of the vibration screen, the middle point of any three adjacent points is located above the line connecting the front and rear points.

[0015] Furthermore, a motor protection structure is provided at the bottom of the vibration beam;

[0016] The motor protection structure includes a mounting main board fixedly arranged at the bottom of the vibration beam and side baffles arranged on both sides of the mounting main board along the length direction of the vibration beam, and the high-frequency vibration motor is fixed at the bottom of the mounting main board; the upper end of the side baffle is connected to the mounting main board, the lower end of the side baffle is lower than the bottom of the high-frequency vibration motor, and a narrowed area is formed at both ends between the mounting main board and the side baffles on both sides.

[0017] Furthermore, the fixed beam includes two connecting plates and a bending plate connected between the two connecting plates, and the bending plate serves as a first hook; or the fixed beam includes two connecting plates and a square support tube connected between the two connecting plates.

[0018] Furthermore, support bars are provided on both sides of the mounting structure, the bottom of the elastic vibration bar is supported on the top of the support bar, and the outer side of the elastic vibration bar is pressed and locked to the mounting structure by a pressure plate.

[0019] In the second aspect, a vibrating screening body is provided, which comprises a plurality of the above-mentioned vibrating screening units, wherein the vibrating screening units are connected end to end and are arranged to be tilted downward in sequence, and the end of the vibrating screen of the previous vibrating screening unit is located above the head end of the vibrating screen of the next vibrating screening unit.

[0020] By adopting the technical solution of the present invention, at least the following beneficial effects are achieved:

[0021] 1. A high-frequency vibration mechanism is provided below the middle of the vibrating screen, and the top of the high-frequency vibration mechanism is against the lower surface of the vibrating screen, so that the high-frequency vibration mechanism can be used to drive the vibrating screen to vibrate at high frequency during specific operation, so that the speed at which the recycled asphalt mixture adheres to the screen is lower than the escape speed of the screen, thereby preventing the recycled asphalt mixture from sticking to the mesh of the screen and blocking it, and can well achieve screening of fine aggregates below 5 mm.

[0022] 2. Use a hook to hook one end of the vibration screen onto the first hook through the first hook, and hook the other end of the vibration screen onto the second hook through the second hook, so that the vibration screen can be easily disassembled, replaced, maintained, etc. during actual use.

[0023] 3. By designing the first hook to be a fixed hook and the second hook to be an adjustable hook, the adjustable hook (i.e., the second hook) can be used to adjust the tension of the vibrating screen during actual use, so that the vibrating screen can be tightly attached to the high-frequency vibration mechanism, thereby ensuring that the high-frequency vibration mechanism can reliably and effectively drive the vibrating screen to vibrate at high frequency, so as to avoid the recycled asphalt mixture sticking to and blocking the mesh of the screen.

[0024] 4. The transverse reinforcement of the vibrating screen is designed to be corrugated steel wire, and longitudinal reinforcement is woven at intervals of 3 to 5 wave peaks on the transverse reinforcement. Since the corrugated steel wire has good elasticity and the two ends of the transverse reinforcement are fixed on the elastic outer frame, the transverse reinforcement will be stretched during the vibration process, thereby compensating for the deformation of the vibrating screen along the length direction during the vibration process, which can effectively improve the service life of the vibrating screen and help the recycled asphalt mixture with a particle size smaller than the mesh specification to fall down quickly, avoiding the recycled asphalt mixture from sticking to the mesh of the screen; and because the high-frequency vibration mechanism is located in the middle of the vibrating screen, only the middle of the vibrating screen will vibrate at high frequency during operation, and the two ends of the vibrating screen will hardly vibrate, thereby ensuring the vibration effect; at the same time, because the fixed beam is fixed, the screen area formed by the weaving of the transverse reinforcement and the longitudinal reinforcement is designed not to cover the area where the fixed beam is located, which can avoid the recycled asphalt mixture from falling down and sticking to the fixed beam.

[0025] 5. By equipping the upper and lower surfaces of the vibrating screen with material flow detectors, connecting the material flow detector with the frequency converter through the PLC control unit, and connecting the frequency converter with the high-frequency vibration motor, during the specific working process, the PLC control unit can control the frequency converter to output different vibration frequencies to the high-frequency vibration motor according to the material flow conditions detected by the material flow detector, so that the high-frequency vibration motor can drive the vibrating screen to vibrate at a suitable vibration frequency, ensuring that there will be no sticking of the material and no damage to the vibrating screen due to excessive vibration force when unloaded; at the same time, shock absorbers are provided at both ends of the vibration beam to reduce the transmission of vibration force to other components, which helps to reduce vibration noise.

[0026] 6. By designing a motor protection structure including a mounting main board and side baffles arranged on both sides of the mounting main board, and making the lower ends of the side baffles lower than the bottom of the high-frequency vibration motor, a narrowed area is formed at both ends between the mounting main board and the side baffles on both sides. This can not only prevent the recycled asphalt mixture from falling and sticking to the high-frequency vibration motor, but also the bottom of the motor protection structure is open, which is conducive to heat dissipation and maintenance operations.

Brief Description of the Drawings

[0027] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0028] Figure 1 It is a structural diagram of a vibrating screening unit of the present invention;

[0029] Figure 2 is a cross-sectional view of the high-frequency vibration mechanism and the motor protection structure of the present invention;

[0030] Figure 3 It is a bottom structural diagram of the high-frequency vibration mechanism and the motor protection structure of the present invention;

[0031] Figure 4 It is a structural diagram of the high-frequency vibration mechanism of the present invention;

[0032] Figure 5 It is a structural diagram of a second draw hook provided on a fixed beam of the present invention;

[0033] Figure 6 It is a structural diagram of a first draw hook provided on a fixed beam of the present invention;

[0034] Figure 7 is a structural diagram of the vibrating screen of the present invention;

[0035] Figure 8 It is a control principle block diagram of the high frequency vibration mechanism of the present invention;

[0036] Fig. 9 It is a structural diagram of the vibration screening body of the present invention;

[0037] Fig.10 yes Fig. 9 A magnified view of the middle A area;

[0038] Fig.11 yes Fig. 9 Enlarged view of the B area;

[0039] Fig.12 yes Fig. 9 Magnified view of area C in the middle.

[0040] Description of reference numerals:

[0041] Vibratory screening unit 100;

[0042] Vibrating screening body 200;

[0043] Vibrating screen 1, first hook 11, second hook 12, elastic outer frame 13, transverse rib 14, longitudinal rib 15;

[0044] High-frequency vibration mechanism 2, vibration beam 21, elastic vibration bar 22, high-frequency vibration motor 23, shock absorber 24, material flow detector 25, PLC control unit 26, frequency conversion controller 27, mounting structure 28, support bar 281, pressing plate 282;

[0045] Fixed beam 3, connecting plate 31, bending plate 32, square support tube 33;

[0046] First retractor 4;

[0047] The second draw hook 5 comprises a hook body 51, a movable rod 52, a locking nut 53, and a fixing cylinder 54;

[0048] The motor protection structure 6 includes a main board 61 , a side baffle 62 , and a narrowed area 63 . [Specific implementation method]

[0049] In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0050] It should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. In addition, the terms "first", "second", etc., etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0051] Embodiment 1

[0052] See also Figures 1 to 8 as well as Figures 10 to 12 As shown, the present invention provides a vibrating screening unit 100, the vibrating screening unit 100 comprises a vibrating screen 1, a high-frequency vibration mechanism 2, a fixed beam 3, a first hook 4 and a second hook 5;

[0053] The vibrating screen 1 is tilted to ensure that the recycled asphalt mixture can slide down from the high end to the low end of the vibrating screen 1 during the screening process; both ends of the vibrating screen 1 are equipped with fixed beams 3, one of the fixed beams 3 is provided with a first hook 4, and the other fixed beam 3 is provided with a second hook 5; one end of the vibrating screen 1 is provided with a first hook 11, and the other end of the vibrating screen 1 is provided with a second hook 12, the first hook 11 is hooked on the first hook 4, and the second hook 12 is hooked on the second hook 5; the high-frequency vibration mechanism 2 is arranged below the middle of the vibrating screen 1, and the top of the high-frequency vibration mechanism 2 is against the lower surface of the vibrating screen 1 and makes the vibrating screen 1 present a bow-shaped structure.

[0054] By adopting the above technical solution of the present invention, at least the following beneficial effects are achieved:

[0055] 1. A high-frequency vibration mechanism 2 is provided below the middle of the vibrating screen 1, and the top of the high-frequency vibration mechanism 2 is against the lower surface of the vibrating screen 1, so that the high-frequency vibration mechanism 2 can be used to drive the vibrating screen 1 to vibrate at high frequency during operation, so that the speed at which the recycled asphalt mixture adheres to the screen is lower than the escape speed of the screen, thereby preventing the recycled asphalt mixture from sticking to the mesh of the screen, and can well achieve screening of fine aggregates below 5 mm.

[0056] 2. Use a hook method to hook one end of the vibration screen 1 on the first hook 4 through the first hook 11, and hook the other end of the vibration screen 1 on the second hook 5 through the second hook 12, so that the vibration screen 1 can be easily disassembled, replaced, maintained, etc. during actual use.

[0057] As a specific implementation of the present invention, two high-frequency vibration mechanisms 2 are disposed at the top of the middle part of the lower surface of the vibration screen 1 to ensure that the middle part of the vibration screen 1 can reliably and effectively vibrate. Of course, the above is only a specific implementation of the present invention, but the present invention is not limited thereto. In specific implementation, the number of high-frequency vibration mechanisms 2 can be adjusted according to actual needs.

[0058] In some embodiments of the present invention, there are multiple first hooks 4 and second hooks 5. Specifically, multiple first hooks 4 or second hooks 5 can be arranged at intervals on the fixed beam 3, and the first hook 4 is a fixed hook, and the second hook 5 is an adjustable hook.

[0059] The present invention designs the first hook 4 as a fixed hook and the second hook 5 as an adjustable hook, so that in the actual use process, the adjustable hook (i.e., the second hook 5) can be used to adjust the tension of the vibrating screen 1, so that the vibrating screen 1 can be tightly attached to the high-frequency vibration mechanism 2, thereby ensuring that the high-frequency vibration mechanism 2 can reliably and effectively drive the vibrating screen 1 to vibrate at high frequency, so as to avoid the recycled asphalt mixture from sticking to and blocking the mesh of the screen.

[0060] As a specific implementation of the present invention, please focus on Figure 5 As shown, the second hook 5 includes a hook body 51, a movable rod 52, a locking nut 53 and a fixed cylinder 54, wherein the fixed cylinder 54 is fixed on the fixed beam 3; the movable rod 52 passes through the interior of the fixed cylinder 54, one end of the movable rod 52 is connected to the hook body 51, and the outer surface of the other end of the movable rod 52 is provided with an external thread section (not shown), and the other end of the movable rod 52 is locked by the locking nut 53. When the second hook 5 of the present invention is used, the locking nut 53 can be rotated to drive the hook body 51 to be movable and adjusted, so that the hook body 51 can tighten or loosen the vibrating screen 1.

[0061] In some embodiments of the present invention, please refer to Figure 7As shown, the vibration screen 1 includes an elastic outer frame 13 and a plurality of transverse ribs 14 and a plurality of longitudinal ribs 15 woven in the elastic outer frame 13, wherein the elastic outer frame 13 can ensure that the vibration screen 1 can bend upward to form a bow structure, and both ends of the transverse ribs 14 and the longitudinal ribs 15 are fixed on the elastic outer frame 13; the transverse ribs 14 are corrugated steel wires, and at least one longitudinal rib 15 is woven at every 3 to 5 wave peaks on the transverse ribs 14, and the longitudinal ribs 15 can specifically be straight steel wires; the screen area formed by weaving the transverse ribs 14 and the longitudinal ribs 15 does not cover the area where the fixed beam 3 is located.

[0062] The present invention designs the transverse reinforcement 14 of the vibrating screen 1 to be a corrugated steel wire, and weaves the longitudinal reinforcement 15 at every 3 to 5 wave peaks on the transverse reinforcement 14. Since the corrugated steel wire has good elasticity and the two ends of the transverse reinforcement 14 are fixed on the elastic outer frame 13, the transverse reinforcement 14 will be stretched during the vibration process, thereby compensating for the deformation of the vibrating screen 1 along the length direction during the vibration process, which can effectively improve the service life of the vibrating screen 1 and also help to make the recycled asphalt mixture with a particle size smaller than the mesh specification fall down quickly, thereby preventing the recycled asphalt mixture from sticking to the mesh of the screen; and because the high-frequency vibration mechanism 2 is arranged in the middle of the vibrating screen 1, only the middle of the vibrating screen 1 will perform high-frequency vibration during operation, and the two ends of the vibrating screen 1 will hardly vibrate, thereby ensuring the vibration effect; at the same time, because the fixed beam 3 is fixed, the screen area formed by weaving the transverse reinforcement 14 and the longitudinal reinforcement 15 is designed not to cover the area where the fixed beam 3 is located, thereby preventing the recycled asphalt mixture from falling down and sticking to the fixed beam 3.

[0063] In some embodiments of the present invention, please refer to Figure 2-4 As shown, the high-frequency vibration mechanism 2 includes a vibration beam 21, an elastic vibration bar 22, a high-frequency vibration motor 23, a shock absorber 24, a material flow detector 25, a PLC control unit 26 and a frequency conversion controller 27;

[0064] Shock absorbers 24 are provided at both ends of the vibration beam 21 to utilize the shock absorbers 24 to play a shock absorbing role, thereby reducing the vibration force transmitted to other components, which helps to reduce vibration noise; the high-frequency vibration motor 23 is arranged at the bottom of the vibration beam 21, so that the high-frequency vibration motor 23 can drive the vibration beam 21 to vibrate; a mounting structure 28 is provided at the top of the vibration beam 21, and elastic vibration strips 22 are provided on both sides of the mounting structure 28. The top of the elastic vibration strip 22 is pressed against the lower surface of the vibration screen 1. By using the elastic vibration strip 22 to press against the lower surface of the vibration screen 1, the elastic vibration strip 22 can be effectively reduced. The vibration screen 1 is damaged during the vibration process; the upper and lower surfaces of the vibration screen 1 are equipped with a material flow detector 25, the material flow detector 25 is used to detect the material flow, the material flow detector 25 is connected to the PLC control unit 26, the PLC control unit 26 is connected to the frequency conversion controller 27, and the frequency conversion controller 27 is connected to the high-frequency vibration motor 23; the vibration frequency of the high-frequency vibration motor 23 is 30-100Hz, the amplitude is 0.3-1.5mm, and the PLC control unit 26 controls the frequency conversion controller 27 to output the required vibration frequency to the high-frequency vibration motor 23 according to the material flow detected by the material flow detector 25;

[0065] At the endpoints at both ends of the top surface of the vibration screen 1 and the contact points between each elastic vibration strip 22 and the lower surface of the vibration screen 1, the middle point of any three adjacent points is located above the line connecting the front and rear points, so as to ensure that the entire vibration screen 1 can be reliably attached to the high-frequency vibration mechanism 2, thereby ensuring the vibration effect of the vibration screen 1.

[0066] Please refer to Figure 8As shown, when the high-frequency vibration mechanism 2 of the present invention is working, the material flow on the upper and lower surfaces of each vibration screen 1 can be detected in real time through the material flow detector 25, and the detection result is fed back to the PLC control unit 26 for calculation, and the frequency conversion controller 27 is controlled according to the calculation result to output different vibration frequencies to the high-frequency vibration motor 23, so that the high-frequency vibration motor 23 drives the vibration screen 1 to vibrate according to the corresponding vibration frequency, thereby ensuring that the vibration screen 1 is always kept in the best working state. For example, in the specific implementation of the present invention, when the equipment is turned on but no material is fed, the PLC control unit 26 can control the frequency conversion controller 27 to output 30Hz AC power (i.e., the vibration frequency is 30Hz) to the high-frequency vibration motor 23 to avoid excessive vibration force of the vibrating screen 1 when unloaded and cause damage to the vibrating screen 1; when feeding starts and the material flow detector 25 detects the material flow, the PLC control unit 26 controls the frequency conversion controller 27 to output 50Hz AC power to the high-frequency vibration motor 23, so that the vibrating screen 1 can drive the recycled asphalt mixture to vibrate at high frequency; at the same time, the material flow detector 25 continues to detect the material flow in real time, and the PLC control unit 26 is used to perform real-time calculations on the detection results, and analyze whether the recycled asphalt mixture sticks to the screen and whether the screening is thorough, and then give a suitable vibration frequency, and output the corresponding vibration frequency to the high-frequency vibration motor 23 through the frequency conversion controller 27.

[0067] The present invention arranges material flow detectors 25 on the upper and lower surfaces of the vibration screen 1, connects the material flow detector 25 with the frequency conversion controller 27 through the PLC control unit 26, and connects the frequency conversion controller 27 with the high-frequency vibration motor 23, so that in the specific working process, the PLC control unit 26 can control the frequency conversion controller 27 to output different vibration frequencies to the high-frequency vibration motor 23 according to the material flow conditions detected by the material flow detector 25, so that the high-frequency vibration motor 23 can drive the vibration screen 1 to vibrate at a suitable vibration frequency, ensuring that there will be no sticking of the material and no damage to the vibration screen 1 due to excessive vibration force when unloaded; at the same time, shock absorbers 24 are arranged at both ends of the vibration beam 21, which can reduce the transmission of vibration force to other components and help reduce vibration noise.

[0068] As a specific embodiment of the present invention, the shock absorber 24 adopts a rubber isolation bearing, which is a device used to improve the seismic resistance of the structure. The structure of the rubber isolation bearing usually includes multiple layers of steel plates and rubber alternately stacked. The steel plate is used as a stiffening material for the rubber bearing, which changes the characteristic of the rubber body's low vertical stiffness, so that it can reduce horizontal vibration effects and withstand large vertical loads. The elastic vibration strip 22 is a rubber strip, specifically a hard rubber strip, which can better transmit the vibration force to the vibration screen 1 and reduce damage to the vibration screen 1; the vibration beam 21 adopts a hollow structure to reduce the weight of the vibration beam 21 and improve the vibration effect.

[0069] In some embodiments of the present invention, in order to protect the high-frequency vibration motor 23, please refer to Figure 3 As shown, a motor protection structure 6 is provided at the bottom of the vibration beam 21;

[0070] The motor protection structure 6 includes a mounting main board 61 fixed to the bottom of the vibration beam 21 and side baffles 62 arranged on both sides of the mounting main board 61 along the length direction of the vibration beam 61, and the high-frequency vibration motor 23 is fixed to the bottom of the mounting main board 61; the upper end of the side baffle 62 is connected to the mounting main board 61, and the lower end of the side baffle 62 is lower than the bottom of the high-frequency vibration motor 23, and a narrowed area 63 is formed at both ends between the mounting main board 61 and the side baffles 62 on both sides.

[0071] The present invention designs the motor protection structure 6 to include a mounting main board 61 and side baffles 62 arranged on both sides of the mounting main board 61, and makes the lower ends of the side baffles 62 lower than the bottom of the high-frequency vibration motor 23, so that narrowed areas 63 are formed at both ends between the mounting main board 61 and the side baffles 62 on both sides. This can not only prevent the recycled asphalt mixture from falling and sticking to the high-frequency vibration motor 23, but also the bottom of the motor protection structure 6 is open, which is conducive to heat dissipation and maintenance operations.

[0072] As the first specific implementation of the present invention, please refer to Fig.11 and Fig.12 As shown, the fixed beam 3 includes two connecting plates 31 and a bending plate 32 connected between the two connecting plates 31, and the bending plate 32 serves as a first hook 4, that is, the bending plate 32 can serve as both a fixed beam 3 and a first hook 4 to simplify the overall structure and reduce costs; the fixed beam 3 of the first specific embodiment is suitable for being arranged between two adjacent vibrating screening units 100.

[0073] As the second specific implementation of the present invention, please refer to Fig.10 As shown, the fixed beam 3 includes two connecting plates 31 and a square support tube 33 connected between the two connecting plates 31; the fixed beam 3 of the second specific embodiment is suitable for being arranged at the upper end of the first vibrating screening unit 100 or the lower end of the last vibrating screening unit 100.

[0074] In some embodiments of the present invention, support bars 281 are provided on both sides of the mounting structure 28, the bottom of the elastic vibration bar 22 is supported on the top of the support bar 281, and the outer side of the elastic vibration bar 22 is pressed and locked to the mounting structure 28 by a pressure plate 282. Specifically, bolts and nuts can be used to lock the pressure plate 282, the elastic vibration bar 22 and the mounting structure 28 together.

[0075] Embodiment 2

[0076] See also Figures 1 to 12 As shown, the present invention provides a vibration screening body 200, which includes a plurality of vibration screening units 100, each of which is connected end to end and is tilted downward in sequence, and the end of the vibration screen 1 of the previous vibration screening unit 100 is located above the head end of the vibration screen 1 of the next vibration screening unit 100, so as to ensure that the recycled asphalt mixture can slide down along the mesh surface of each vibration screening unit 100 in sequence, and at the same time, the facing ends of two adjacent vibration screening units 100 share a fixed beam 3; wherein, the structure of the vibration screening unit 100 and the technical effects that can be obtained are exactly the same as those in Example 1. Please refer to the detailed introduction of Example 1 for details, which will not be repeated here.

[0077] As a specific embodiment of the present invention, the vibration screening body 200 includes three vibration screening units 100 connected end to end and arranged downwardly in sequence. At the same time, the first hook 11 at the upper end of the vibration screen 1 of the first vibration screening unit 100 and the second hook 12 at the lower end are both arranged downward, and the first hook 11 at the upper end of the vibration screen 1 of the second and third vibration screening units 100 are both arranged upward, and the second hook 12 at the lower end of the vibration screen 1 of the second and third vibration screening units 100 are both arranged downward. Of course, the above is only a specific embodiment of the present invention, but the present invention is not limited to this. In the specific implementation, the number of vibration screening units 100 included in the vibration screening body 200 can also be adjusted according to actual needs; at the same time, when the number of vibration screening units 100 included in the vibration screening body 200 is greater than 3, it is necessary to make the first hook 11 at the upper end of the vibration screen 1 of the second and subsequent vibration screening units 100 all face upward, and the second hook 12 at the lower end all face downward.

[0078] When the vibrating screening body 200 of the present invention is working, the high-frequency vibration mechanism 2 in contact with the lower surface of the vibrating screen 1 of each vibrating screening unit 100 will drive the vibrating screen 1 to vibrate at high frequency. When the regenerated asphalt mixture enters the upper part of the vibrating screen 1 of the first vibrating screening unit 100, the regenerated asphalt mixture will slide obliquely downward along the screen surface of the vibrating screen 1 of the first vibrating screening unit 100 to the vibrating screen 1 of the second vibrating screening unit 100, and then slide obliquely downward along the screen surface of the vibrating screen 1 of the second vibrating screening unit 100 to the vibrating screen 1 of the third vibrating screening unit 100, and finally slide obliquely downward along the screen surface of the vibrating screen 1 of the third vibrating screening unit 100 to the outlet and be output. At the same time, in this process, the regenerated asphalt mixture with a particle size smaller than the screen hole specification of the vibrating screen 1 of the vibrating screening body 200 will pass through the vibrating screen 1 and fall down.

[0079] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A vibrating screening unit, characterized in that: It includes a vibrating screen, a high-frequency vibration mechanism, a fixed beam, a first hook and a second hook; The vibrating screen is arranged at an angle, and fixed beams are provided at both ends of the vibrating screen, one of the fixed beams is provided with a first hook, and the other fixed beam is provided with a second hook; a first hook is provided at one end of the vibrating screen, and a second hook is provided at the other end of the vibrating screen, the first hook is hooked on the first hook, and the second hook is hooked on the second hook; the high-frequency vibration mechanism is arranged below the middle of the vibrating screen, and the top of the high-frequency vibration mechanism abuts against the lower surface of the vibrating screen and makes the vibrating screen present a bow-shaped structure.

2. A vibrating screening unit according to claim 1, characterized in that: Two high-frequency vibration mechanisms are arranged at the top of the middle part of the lower surface of the vibration screen.

3. A vibrating screening unit according to claim 1, characterized in that: There are multiple first hooks and multiple second hooks, and the first hook is a fixed hook, while the second hook is an adjustable hook.

4. A vibrating screening unit according to claim 3, characterized in that: The second pull hook includes a hook body, a movable rod, a locking nut and a fixed tube, wherein the fixed tube is fixed on the fixed beam; the movable rod passes through the interior of the fixed tube, one end of the movable rod is connected to the hook body, and the outer surface of the other end of the movable rod is provided with an external thread section, and the other end of the movable rod is locked by a locking nut.

5. A vibrating screening unit according to claim 1, characterized in that: The vibrating screen comprises an elastic outer frame and a plurality of transverse ribs and a plurality of longitudinal ribs woven in the elastic outer frame; the transverse ribs are corrugated steel wires, and at least one longitudinal rib is woven at intervals of 3 to 5 wave peaks on the transverse ribs; the screen area formed by weaving the transverse ribs and the longitudinal ribs does not cover the area where the fixed beam is located.

6. A vibrating screening unit according to claim 1, characterized in that: The high-frequency vibration mechanism includes a vibration beam, an elastic vibration bar, a high-frequency vibration motor, a shock absorber, a material flow detector, a PLC control unit and a frequency conversion controller; Shock absorbers are provided at both ends of the vibration beam, and the high-frequency vibration motor is provided at the bottom of the vibration beam; a mounting structure is provided at the top of the vibration beam, and elastic vibration strips are provided on both sides of the mounting structure, and the top of the elastic vibration strips abuts against the lower surface of the vibration screen; a material flow detector is provided on the upper and lower surfaces of the vibration screen, and the material flow detector is connected to the PLC control unit, and the PLC control unit is connected to the frequency conversion controller, and the frequency conversion controller is connected to the high-frequency vibration motor; the vibration frequency of the high-frequency vibration motor is 30-100 Hz, and the amplitude is 0.3-1.5 mm, and the PLC control unit controls the frequency conversion controller to output the required vibration frequency to the high-frequency vibration motor according to the material flow detected by the material flow detector; Among the endpoints at both ends of the top surface of the vibration screen and the contact points between each elastic vibration strip and the lower surface of the vibration screen, the middle point of any three adjacent points is located above the line connecting the front and rear points.

7. A vibrating screening unit according to claim 6, characterized in that: A motor protection structure is provided at the bottom of the vibration beam; The motor protection structure includes a mounting main board fixedly arranged at the bottom of the vibration beam and side baffles arranged on both sides of the mounting main board along the length direction of the vibration beam, and the high-frequency vibration motor is fixed at the bottom of the mounting main board; the upper end of the side baffle is connected to the mounting main board, the lower end of the side baffle is lower than the bottom of the high-frequency vibration motor, and a narrowed area is formed at both ends between the mounting main board and the side baffles on both sides.

8. A vibrating screening unit according to claim 3, characterized in that: The fixed beam comprises two connecting plates and a bending plate connected between the two connecting plates, and the bending plate serves as a first hook; or the fixed beam comprises two connecting plates and a square support tube connected between the two connecting plates.

9. A vibrating screening unit according to claim 6, characterized in that: Support bars are arranged on both sides of the installation structure, the bottom of the elastic vibration bar is supported on the top of the support bar, and the outer side of the elastic vibration bar is pressed and locked on the installation structure by a pressing plate.

10. A vibrating screening body, characterized in that: The vibration screening body comprises a plurality of vibration screening units as described in any one of claims 1 to 9, wherein the vibration screening units are connected end to end and are arranged in a downwardly inclined manner in sequence, and the end of the vibration screening mesh of the previous vibration screening unit is located above the head end of the vibration screening mesh of the next vibration screening unit.

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