Dynamic screen classifying method, system and terminal for ultrasonic vibrating screen

Abstract

The invention relates to a dynamic screen classifying method, system and terminal for an ultrasonic vibrating screen, and relates to the screening technology. Determining the amplitude and rotation speed of the screen according to the material flow speed; determining the motion height of the material according to the amplitude of the screen; according to the movement height of the materials, the inner ring height of inner ring lifting is determined; determining the number of lifted inner rings of the screen according to the rotating speed; and controlling a preset lifting device to lift the notch loop according to the inner ring height according to the inner ring number. The screening device has the effect of improving the screening precision.

Description

Technical Field

[0001] The present invention relates to the field of screening technology, and in particular to a dynamic grading screen method, system and terminal for ultrasonic vibrating screen. Background Art

[0002] The ultrasonic technology is organically combined with the vibrating screen. On the basis of the traditional rotary vibrating screen, a high-frequency and low-amplitude ultrasonic vibration wave is superimposed on the screen.

[0003] When working, the ultrasonic vibrating screen combines ultrasonic vibration with ordinary vibration. Due to the effect of the vibration frequency, the material will quickly reach the edge when entering the vibrating screen. It uses high-frequency and low-amplitude ultrasonic vibration to decompose the particles adhering to the screen, effectively preventing the screen holes from being blocked and improving screening efficiency and accuracy.

[0004] With respect to the above-mentioned related technologies, some qualified materials will remain in the unqualified materials in the prior art, which easily causes waste of resources. Summary of the invention

[0005] In order to improve the screening accuracy, the present invention provides a dynamic grading screen method, system and terminal for an ultrasonic vibrating screen.

[0006] In a first aspect, a method, system and terminal for a dynamic grading screen for an ultrasonic vibrating screen are characterized by comprising: Get material flow rate; Determine the screen amplitude and rotation speed according to the material flow rate; Determine the moving height of the material according to the amplitude of the screen; Determine the inner ring height at which the inner ring is raised according to the moving height of the material; Determine the number of inner rings that the screen is raised by according to the rotation speed; According to the number of inner rings, the preset lifting device is controlled to lift the gap ring according to the height of the inner rings.

[0007] By adopting the above technical scheme, the vibration amplitude and rotation speed of the screen are controlled according to the flow rate of the material, and then the movement height of the material is obtained through the vibration amplitude of the screen. The notched ring channel and the height of the notched ring channel required in the material screening process can be obtained according to the rotation speed and the movement height of the material. The notched ring channel can increase the movement trajectory of the material during the movement process, thereby improving the screening accuracy during the screening process.

[0008] Optionally, also include: Get product information; Determine the required aperture area of ​​the screen based on product information; Determine the magnification factor based on the aperture area and the preset original area; Determine the telescopic height according to the magnification factor; The preset telescopic device is controlled according to the telescopic height to adjust the screen aperture.

[0009] By adopting the above technical solution, the required screening aperture size of the screen is determined according to the pre-set particle size of qualified products. If it is different from the original aperture size, the telescopic device set under the screen is controlled to change its length, and the screen is stretched by lifting the telescopic device to adjust the aperture so that qualified products of the material can be screened through the screen.

[0010] Optionally, it also includes; Acquire a screen image; Determine the damaged position of the screen according to the screen image; Determine the bending degree of the screen according to the telescopic height; Determine the damage distance of the screen according to the damage location and the degree of bending of the screen; Control the preset fixing device to release the fixing, and control the rolling of the preset screen drum according to the damage distance; Control the preset fixing device to fix the screen and restore the telescopic device to the telescopic height.

[0011] By adopting the above technical solution, when the screen is detected to be damaged, the rolling of the screen drum is controlled according to the damaged position and the bending degree of the screen, and the damaged screen is moved by the rolling of the screen drum, so that the damaged screen can be replaced, making the screen intact and reducing the impact on production.

[0012] Optionally, it also includes; Get the telescopic length.

[0013] Determine the fault location of the telescopic device based on the telescopic length; Determine the moving direction and moving distance of the preset telescopic device according to the fault location and the preset fault area; According to the moving distance, the telescopic device preset on the moving guide rail is controlled to move in the moving direction; Determine the replacement direction and replacement distance according to the fault location and the preset replacement area; The telescopic device preset on the moving guide rail is controlled to move in the replacement direction according to the replacement distance.

[0014] By adopting the above technical solution, when damage to the telescopic device is detected, the damaged telescopic device is made to enter the fault area, and a new telescopic device is replaced to the damaged position, thereby replacing the damaged telescopic device to work.

[0015] Optionally, it also includes; Get the preset guide rail position of the moving guide rail; Determine the guide rail angle according to the guide rail position; Determine the rotation angle based on the guide rail angle and damage location; Control the rotation of the preset moving guide rail according to the rotation angle, and determine the blocking direction and blocking distance of the preset telescopic device according to the damage position and the guide rail position; The telescopic device preset on the moving guide rail is controlled to move in the blocking direction according to the blocking distance, and the blocking height is determined based on the damaged position; The preset telescopic device is controlled to rise according to the blocking height to block the damaged position.

[0016] By adopting the above technical solution, when damage to the screen is detected, the damaged position is determined, and the guide rail angle is determined according to the guide rail position, so that the guide rail position is changed, so that the guide rail and the damaged position are located in the same position, and then the telescopic device can reach the damaged position of the screen, and the telescopic device is used to block the damaged position of the screen, and the telescopic device moves with the damaged position of the screen, thereby reducing the falling of materials during the screen replacement process.

[0017] Optionally, it also includes; Determining a damaged area of ​​the screen based on the damage location; Determine the expansion area based on the damaged area; Determine the curvature coefficient of the expanded area according to the curvature of the screen; The preset unfolding device is controlled to unfold according to the curvature coefficient.

[0018] By adopting the above technical solution, when it is detected that the damaged area of ​​the screen is too large, the expansion area is determined according to the bending degree and the damaged area of ​​the screen, and the telescopic device is controlled to expand according to the expansion area, thereby blocking the damaged area of ​​the screen and reducing the material falling from the damaged area.

[0019] Optionally, it also includes; Determine the curvature coefficient of the screen according to the rotation speed; Determine the rolling distance of the screen drum according to the degree of bending and the curvature coefficient; Control the rolling of the screen drum according to the rolling distance; Determine the telescopic distance according to the bending degree and curvature coefficient; The telescopic device is controlled to extend and retract according to the telescopic distance.

[0020] By adopting the above technical solution, when it is detected that the screening speed does not meet the production requirements, the telescopic device is controlled to rise, and the screen drum is controlled to roll to release the screen, thereby increasing the curvature of the screen while keeping the screen aperture unchanged, thereby increasing the screening speed.

[0021] Optionally, it also includes; Obtaining storage quality in a preset storage device; determining a mass change rate of the stored mass based on the stored mass; Determine the flow rate change rate of the material flow rate according to the material flow rate; Determine the rate difference according to the flow rate difference and the mass rate difference; When the rate of change difference is greater than a preset rate of change difference value, the screen humidity is obtained; Determine the vibration frequency of the screen according to the screen humidity; The vibration of the screen is controlled according to the vibration frequency of the screen to increase the screening speed.

[0022] By adopting the above technical scheme, the blockage degree of the screen is obtained according to the detected flow change rate and mass change rate. When the blockage degree is too large, the humidity of the screen is obtained, and the influence of the humidity on the blockage degree is judged according to the humidity of the screen, thereby changing the vibration frequency of the screen. The higher vibration frequency of the screen can make the high-humidity material be screened.

[0023] In a second aspect, the present application provides a dynamic grading screen system for an ultrasonic vibrating screen, which adopts the following technical solution: A dynamic grading screen system for an ultrasonic vibrating screen includes an acquisition module for acquiring material flow rate, product information, screen image, telescopic length, guide rail position, storage quality and screen humidity; A memory for storing a program of any one of the above-mentioned dynamic grading screen methods for ultrasonic vibrating screens; The processor is used to load, execute and implement the program stored in the memory.

[0024] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and execute any one of the above-mentioned dynamic grading screen methods for ultrasonic vibration screens.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The vibration amplitude and rotation speed of the screen are controlled according to the flow rate of the material, and the movement height of the material is obtained through the vibration amplitude of the screen. The gap ring and the height of the gap ring required in the material screening process can be obtained according to the rotation speed and the movement height of the material. The gap ring can increase the movement track of the material during the movement process, thereby improving the screening accuracy during the screening process; 2. Determine the required sieve aperture size according to the pre-set particle size of qualified products. If it is different from the original aperture size, control the telescopic device set under the sieve to change the length, stretch the sieve by lifting the telescopic device, and adjust the aperture so that qualified products of the material can pass through the sieve to complete screening; 3. When the screen is detected to be damaged, the rolling of the screen drum is controlled according to the damaged position and the bending degree of the screen. The damaged screen is moved by the rolling of the screen drum, so that the damaged screen can be replaced to make the screen complete and reduce the impact on production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 1 ; Figure 2 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 2 ; Figure 3 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 3 ; Figure 4 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 4 ; Figure 5 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 5 ; Figure 6 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 6 ; Figure 7 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 7 ; Figure 8 It is a process for a dynamic grading screen method for ultrasonic vibrating screens. Figure 8 . DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] A dynamic grading screen method, system and terminal for ultrasonic vibrating screen. The present invention adjusts the lifting number and lifting height of the notched loop of the screen by the flow rate of the material, and improves the screening efficiency and screening accuracy of the vibrating screen by changing the telescopic height of the telescopic device under the screen.

[0029] Reference Figure 1 The present application discloses a method for dynamically grading screens for ultrasonic vibrating screens, comprising the following steps: Step 100: Obtain material flow rate.

[0030] The material flow rate refers to the falling speed of the material in the falling channel. The falling speed of the material can be detected by embedding a flow rate sensor in the material falling channel. The method for obtaining the material flow rate is selected by the staff according to the actual situation and will not be elaborated here.

[0031] Step 101: Determine the screen amplitude and rotation speed according to the material flow rate.

[0032] The screen amplitude refers to the physical displacement of the screen body during vibration. The rotation speed refers to the speed at which the material is rotated around in the screen. The vibration frequency and rotation speed can be obtained from the flow rate data table. The flow rate data table refers to a data table that records the vibration frequency and rotation speed corresponding to different material flow rates obtained in advance through experiments.

[0033] Step 102: Determine the moving height of the material according to the vibration amplitude of the screen.

[0034] The movement height refers to the maximum height of the material jumping under the influence of the screen amplitude. The screen amplitude determines the movement height of the material on the screen. The movement height of the material can be obtained from the amplitude data table. The amplitude data table records the material movement height corresponding to different amplitudes obtained in advance through experiments.

[0035] Step 103: Determine the inner ring height at which the inner ring is raised according to the moving height of the material.

[0036] The inner ring refers to a circular ring with a gap used to increase the material movement trajectory. The inner ring is selected by the staff according to the actual situation and will not be described here. The height of the inner ring is used to prevent the material from jumping out of the inner ring. The height of the inner ring can be obtained by querying from the movement height data table. The movement height data table records the inner ring height corresponding to the movement height of different materials obtained in advance through experiments.

[0037] Step 104: Determine the number of inner rings of the screen that are raised according to the rotation speed.

[0038] The number of inner rings refers to the number of inner rings required to increase the movement trajectory of the screen. The number of inner ring rises can be obtained by querying from the screening data table. The screening data table records the number of inner rings corresponding to different rotation speeds obtained in advance through experiments.

[0039] Step 105: Control the preset lifting device according to the number of inner rings to lift the gap ring according to the inner ring height.

[0040] The lifting device refers to a plurality of inner ring lifting devices of different diameters arranged below the screen. The inner ring lifting device controls the lifting of the inner ring by a cylinder. The inner ring lifting device is selected by the staff according to actual conditions and will not be elaborated here.

[0041] The vibration amplitude and rotation speed of the screen are controlled according to the flow rate of the material, and the movement height of the material is obtained through the rotation speed. The notch ring and the height of the notch ring required in the material screening process can be obtained based on the vibration amplitude of the screen and the movement height of the material. The notch ring can increase the movement trajectory of the material during the movement process, thereby improving the screening accuracy during the screening process.

[0042] Reference Figure 2 , a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 200: Obtain product information; Product information refers to the particle diameter required for the product. The product information can be manually input by the staff. The method for obtaining the product information is selected by the staff according to the actual situation and will not be elaborated here.

[0043] Step 201: Determine the aperture area required for the screen according to product information; The aperture area refers to the aperture of the screen, which can be obtained from the aperture data table. The aperture data table refers to a data table that records the aperture areas corresponding to the particle diameters of different materials obtained in advance through experiments.

[0044] Step 202: determining the magnification factor according to the aperture area and the preset original area; The magnification factor refers to the magnification factor required by the aperture area of ​​the material compared with the original area. The magnification factor can be determined by calculating the quotient of the aperture area and the original area.

[0045] Step 203: Determine the telescopic height according to the magnification factor; The telescopic device refers to a device used to lift the screen. The telescopic device can use a telescopic rod driven by a cylinder. The telescopic device is selected by the staff according to actual conditions and will not be described in detail here.

[0046] The telescopic height refers to the height required to operate the telescopic device to change the aperture of the screen. The telescopic height can be obtained from the telescopic data table. The telescopic data table refers to a data table that records the telescopic heights corresponding to different magnification factors obtained in advance through experiments.

[0047] Step 204: Control a preset telescopic device to adjust the screen aperture according to the telescopic height.

[0048] The required aperture size of the screen is determined according to the particle diameter required by the product. If it is different from the original aperture size, the telescopic device set under the screen is controlled to change its length. The screen is stretched by lifting the telescopic device to adjust the aperture, so that qualified materials can pass through the screen to complete screening.

[0049] Reference Figure 3, a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 300: Acquire a screen image.

[0050] The screen image refers to a picture of the screen in the horizontal direction, which can be obtained through a camera. The method for obtaining the screen image is selected by the staff according to actual conditions and will not be elaborated here.

[0051] Step 301: Determine the damaged position of the screen according to the screen image.

[0052] The damaged position of the screen refers to the position point where the screen is damaged in the screen image. The damaged position can be determined by image recognition technology. The method for determining the damaged position is common knowledge among people in this field and will not be described in detail here.

[0053] Step 302: Determine the bending degree of the screen according to the telescopic height.

[0054] The bending degree of the screen refers to the inclination angle of the bending produced after the telescopic device lifts the screen. The bending degree of the screen can be obtained from the bending data table. The bending data table refers to a data table that records the bending degrees of the screen corresponding to different telescopic heights obtained in advance through experiments.

[0055] Step 303: Determine the damage distance of the screen according to the damage position and the bending degree of the screen.

[0056] The screen drum is a screen replacement device externally mounted on the vibrating screen. The screen drum is symmetrically arranged on both sides of the vibrating screen. The screen drum on one side is used to recover the screen, and the screen drum on the other side is used to release the screen. The two sides of the screen are respectively fixed on the screen drum on one side. The screen is driven to move in the horizontal direction of the vibrating screen by the rolling of the drum, thereby replacing the screen.

[0057] The damage distance refers to the distance between the damaged position of the screen and the screen drum used to recover the screen. The damage distance can be determined by calculating the damaged position of the screen and the degree of bending of the screen. The damaged distance of the screen can be obtained by querying from the damage location data table. The damage location data table records the damage distances corresponding to different damage positions and degrees of screen bending obtained in advance through experiments.

[0058] Step 304: Control the preset fixing device to release the fixing, and control the rolling of the preset screen drum according to the damage distance.

[0059] The fixing device is a device that uses hydraulic pressure to fix the screen. The fixing device is selected by the staff according to the actual situation and will not be described here. Releasing the fixing can prevent the screen from being unable to be replaced due to the fixing when the screen drum rolls.

[0060] Step 305: Control a preset fixing device to fix the screen.

[0061] When the screen is replaced, it is fixed by the fixing device. When the screen is detected to be damaged, the fixing device releases the fixation of the screen and controls the rolling of the screen drum according to the damaged position and the bending degree of the screen. The damaged screen is moved horizontally by the rolling of the screen drum, so that the damaged screen can be replaced, making the screen complete and reducing the impact on production.

[0062] Reference Figure 4 , a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 400: Obtain the telescopic length.

[0063] The telescopic length refers to the telescopic height value of the telescopic device, which can be detected by using a height sensor. The method for obtaining the telescopic length is selected by the staff according to the actual situation and will not be elaborated here.

[0064] Step 401: determining the fault position of the telescopic device according to the telescopic length; The fault position refers to the position point of the telescopic device number determined by comparing the telescopic length with the set working length. The working length refers to the height value to which the telescopic length should be extended. The working length can be obtained by reading data from the telescopic device. Whether the telescopic device is faulty is determined based on the telescopic length and the working length. If it is faulty, the preset telescopic number of the telescopic device is determined based on the telescopic length and the working length. The fault position can be obtained by querying from the fault data table. The fault data table refers to a data table that records the fault positions corresponding to different telescopic numbers obtained in advance through experiments.

[0065] Step 402: determining a preset moving direction and moving distance of the telescopic device according to the fault location and the preset fault area; The movable guide rail refers to a device for controlling the movement of the telescopic device. The movable guide rail embedded in the circular guide rail is a cross guide rail. The movable guide rail can rotate in the horizontal direction of the vibrating screen. The movable guide rail is selected by the staff according to the actual situation and will not be described in detail here. The fault area is the location where the damaged telescopic device is stored. The fault area is located on the circular guide rail of the movable guide rail. The moving direction refers to the direction closest to the fault location to the fault area. The moving distance refers to the distance closest to the fault location to the fault area. The method for determining the moving direction and moving distance is common knowledge known to people in this field and will not be described in detail here.

[0066] Step 403: controlling the telescopic device preset on the moving guide rail to move in the moving direction according to the moving distance; The telescopic device on the moving guide rail is controlled to move by a determined moving distance and moving direction so that the damaged telescopic device enters the fault area.

[0067] Step 404: determining a replacement direction and a replacement distance according to the fault location and a preset replacement area; The replacement area refers to the area where intact telescopic devices are stored. The replacement area is located on the circular guide rail of the movable guide rail, and the replacement area and the fault area are symmetrically arranged. The replacement direction refers to the direction in which the telescopic device in the replacement area reaches the fault position. The replacement distance refers to the shortest distance from the replacement area to the fault position of the new telescopic device. The method for determining the replacement direction and the replacement distance is common knowledge among personnel in this field and will not be elaborated here.

[0068] Step 405: Control the telescopic device preset on the moving guide rail to move in the replacement direction according to the replacement distance.

[0069] When damage to the telescopic device is detected, the damaged telescopic device is controlled to enter the fault area by moving the guide rail, and a new telescopic device is replaced from the replacement area to the damaged position, thereby replacing the damaged telescopic device to work.

[0070] Reference Figure 5 , a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 500: Obtaining a preset guide rail position of a movable guide rail; The guide rail position refers to the position point of the movable guide rail, which can be located by a locator on the movable guide rail. The method for obtaining the guide rail position is selected by the staff according to the actual situation and will not be elaborated here.

[0071] Step 501: determining the guide rail angle according to the guide rail position; The guide rail angle refers to the angle between the guide rail position and the initial position. The initial position is determined by the positioner on the vibrating screen. The guide rail angle is the angle value measured when the moving guide rail reaches the guide rail position from the initial position. The guide rail angle can be determined by calculating the difference between the guide rail position and the initial position.

[0072] Step 502: determining a rotation angle according to the guide rail angle and the damage position; The rotation angle is the shortest angle value required for the guide rail to coincide with the damaged position. The rotation angle can be determined by calculating the difference between the guide rail angle and the damaged position.

[0073] Step 503: controlling the preset movable guide rail to rotate according to the rotation angle, and determining the blocking direction and blocking distance of the preset telescopic device according to the damage position and the guide rail position; The blocking direction refers to the moving direction of the telescopic device to reach the damaged position after the damaged position coincides with the guide rail position. The blocking distance refers to the moving distance of the telescopic device to reach the damaged position after the damaged position coincides with the guide rail position. The method for determining the blocking direction and the blocking distance is common knowledge to people in this field and will not be elaborated here.

[0074] Step 504: controlling the telescopic device preset on the moving guide rail to move in the blocking direction according to the blocking distance, and determining the blocking height based on the damaged position; The telescopic device on the movable guide rail is controlled to reach the damaged position by determining the blocking distance and blocking direction. The blocking height refers to the height at which the telescopic device can reach the damaged area of ​​the screen, which can be obtained from the blocking height data table. The blocking height data table refers to a data table that records the blocking heights corresponding to different damaged positions obtained in advance through experiments.

[0075] Step 505: Control the preset telescopic device to rise according to the blocking height to block the damaged position.

[0076] When it is detected that the screen is damaged, the damaged position is determined, and the guide rail rotation angle is determined based on the guide rail position and the damaged position, so that the guide rail position is changed so that the guide rail and the damaged position are in the same position, and then the telescopic device reaches the damaged position of the screen, and the telescopic device is used to block the damaged position of the screen, and the telescopic device moves with the damaged position of the screen, thereby reducing the falling of materials during the screen replacement process.

[0077] Reference Figure 6 , a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 600: determining a damaged area of ​​the screen based on the damaged location; The damaged area refers to the range of the damaged location. The damaged area can be determined by using image recognition technology. The method for determining the damaged area is common knowledge among people in this field and will not be elaborated here.

[0078] Step 601: determining the expansion area according to the damaged area; The deployment device refers to a deployable device integrated on the telescopic device. The deployment device has multiple deployment shapes. The deployment device is selected by the staff according to the actual situation, and will not be described here. The deployment area refers to the area value of the deployment device on the telescopic device used to block the damaged area. The deployment area can be determined by calculating the circumscribed damaged area of ​​the minimum deployment shape.

[0079] Step 602: determining the curvature coefficient of the unfolded area according to the curvature degree of the screen; The curvature coefficient refers to the arc angle of the unfolding area required by the unfolding device. The curvature coefficient can be directly adopted as the degree of curvature, or the degree of curvature of the unfolding can be appropriately increased.

[0080] Step 603: Control the preset unfolding device to unfold according to the curvature coefficient.

[0081] When a damaged area of ​​the screen is detected, the expansion area and the curvature coefficient of the expansion area are determined by the bending degree of the screen and the damaged area, so as to control the expansion device on the telescopic device to expand according to the expansion area, thereby blocking the damaged area of ​​the screen and reducing the material falling from the damaged area.

[0082] Reference Figure 7 , a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 700: Determine the curvature coefficient of the screen according to the rotation speed.

[0083] The curvature coefficient refers to the curvature required by the screen, and the curvature coefficient can be obtained from the curvature data table. The curvature data table records the curvature coefficients corresponding to different rotation speeds obtained in advance through experiments.

[0084] Step 701: Determine the rolling distance of the screen drum according to the bending degree and the curvature coefficient.

[0085] The rolling distance of the screen refers to the distance that the screen drum that releases the screen rolls. Releasing the screen can change the degree of curvature of the screen without changing the aperture area of ​​the screen. The rolling distance can be obtained from the rolling data table, which records the rolling distances corresponding to different degrees of curvature and curvature coefficients obtained in advance through experiments.

[0086] Step 702: Control the screen drum to roll according to the rolling distance.

[0087] The rolling of the screen drum is controlled by the rolling distance, so that the screen is released and the curvature of the screen is changed.

[0088] Step 703: Determine the telescopic distance according to the bending degree and the curvature coefficient.

[0089] The telescopic distance refers to the distance that the telescopic device needs to telescope in order to reach the aperture diameter before the degree of curvature of the screen changes. The change in the telescopic distance can make the screen reach the required degree of curvature. The telescopic distance can be obtained from the distance data table. The distance data table records the telescopic distances corresponding to different degrees of curvature and curvature coefficients obtained in advance through experiments.

[0090] Step 704: Control the telescopic device to telescope according to the telescopic distance.

[0091] When it is detected that the rotation speed cannot meet the production requirements and the rotation speed cannot be changed, the telescopic device is controlled to rise by determining the bending degree, and the screen drum is controlled to roll to release the screen by confirming the rolling distance, thereby increasing the curvature of the screen while keeping the screen aperture unchanged, thereby increasing the screening speed.

[0092] Reference Figure 8, a dynamic grading screen method for an ultrasonic vibrating screen, further comprising: Step 800: Obtaining storage quality in a preset storage device; The storage device refers to the storage container for qualified materials after screening. The storage device is selected by the staff according to the actual situation and will not be described in detail here. The storage quality refers to the mass value entering the storage device, which can be obtained by detecting the pressure of the material on the bottom of the storage device through the pressure sensor. The method for obtaining the storage quality is selected by the staff according to the actual situation and will not be described in detail here.

[0093] Step 801: determining a quality change rate of a storage quality according to the storage quality; The mass change rate refers to the change in mass in the storage device per unit time during the screening process. The mass change rate can be determined by calculating the storage mass at different times.

[0094] Step 802: determining a flow rate change rate of the material flow rate according to the material flow rate; The flow rate change rate refers to the change in material flow rate per unit time during the screening process. The flow rate change rate can be determined by calculating the material flow rate at different times.

[0095] Step 803: determining the change rate difference according to the flow change rate difference and the mass change rate difference; The rate difference refers to the rate difference obtained by calculating the flow rate difference and the mass rate difference in unit time. The rate difference can be used to detect the degree of blockage of the screen. The rate difference can be determined by calculating the flow rate difference and the mass rate difference.

[0096] Step 804: when the change rate difference is greater than a preset change rate difference value, the screen humidity is obtained; A change rate difference greater than the change rate difference value indicates that the screen is clogged. The screen humidity refers to the humidity of the screen, which can be obtained through a humidity sensor. The method for obtaining the screen humidity is selected by the staff based on actual conditions and will not be elaborated here.

[0097] Step 805: Determine the vibration frequency of the screen according to the screen humidity; The vibration frequency of the screen refers to the number of times the screen vibrates per unit time. The vibration frequency of the screen can be obtained from the frequency data table. The frequency data table records the vibration frequencies of the screen corresponding to different screen humidity levels obtained in advance through experiments.

[0098] Step 806: Control the vibration of the screen according to the vibration frequency of the screen to increase the screening speed.

[0099] The blockage degree of the screen is obtained based on the detected flow rate change rate and mass change rate. When the blockage degree is too large, the screen humidity is obtained. The influence of humidity on the blockage degree is judged based on the humidity of the screen, thereby changing the vibration frequency of the screen. A higher vibration frequency of the screen can make high-humidity materials be screened.

[0100] Based on the same inventive concept, an embodiment of the present invention provides a dynamic grading screen system for an ultrasonic vibrating screen, comprising an acquisition module for acquiring material flow rate, product information, screen image, telescopic length, guide rail position, storage quality and screen humidity; A memory for storing a program of any one of the above-mentioned dynamic grading screen methods for ultrasonic vibrating screens; The processor is used to load, execute and implement the program stored in the memory.

[0101] Based on the same inventive concept, an embodiment of the present invention provides an intelligent terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and executes a dynamic grading screening method for an ultrasonic vibration screen.

[0102] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0103] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dynamic grading screen method for an ultrasonic vibrating screen, characterized in that: include: Get material flow rate; Determine the screen amplitude and rotation speed according to the material flow rate; Determine the material movement height based on the screen amplitude; Determine the inner ring height at which the inner ring is raised according to the moving height of the material; Determine the number of inner rings that the screen is raised by according to the rotation speed; According to the number of inner rings, the preset lifting device is controlled to lift the gap ring according to the height of the inner rings.

2. A dynamic grading screen method for ultrasonic vibrating screen according to claim 1, characterized in that: Also includes: Get product information; Determine the required aperture area of ​​the screen based on product information; Determine the magnification factor based on the aperture area and the preset original area; Determine the telescopic height according to the magnification factor; The preset telescopic device is controlled according to the telescopic height to adjust the screen aperture.

3. A dynamic grading screen method for ultrasonic vibrating screen according to claim 2, characterized in that: Also includes; Acquire a screen image; Determine the damaged position of the screen according to the screen image; Determine the bending degree of the screen according to the telescopic height; Determine the damage distance of the screen according to the damage location and the degree of bending of the screen; Control the preset fixing device to release the fixing, and control the rolling of the preset screen drum according to the damage distance; Control the preset fixing device to fix the screen and restore the telescopic device to the telescopic height.

4. A dynamic grading screen method for ultrasonic vibrating screen according to claim 3, characterized in that: Also includes; Get the telescopic length; Determine the fault location of the telescopic device based on the telescopic length; Determine the moving direction and moving distance of the preset telescopic device according to the fault location and the preset fault area; According to the moving distance, the telescopic device preset on the moving guide rail is controlled to move in the moving direction; Determine the replacement direction and replacement distance according to the fault location and the preset replacement area; The telescopic device preset on the moving guide rail is controlled to move in the replacement direction according to the replacement distance.

5. A dynamic grading screen method for ultrasonic vibrating screen according to claim 4, characterized in that: Also includes; Get the preset guide rail position of the moving guide rail; Determine the guide rail angle according to the guide rail position; Determine the rotation angle based on the guide rail angle and damage location; Control the rotation of the preset moving guide rail according to the rotation angle, and determine the blocking direction and blocking distance of the preset telescopic device according to the damage position and the guide rail position; The telescopic device preset on the moving guide rail is controlled to move in the blocking direction according to the blocking distance, and the blocking height is determined based on the damaged position; The preset telescopic device is controlled to rise according to the blocking height to block the damaged position.

6. A dynamic grading screen method for ultrasonic vibrating screen according to claim 5, characterized in that: Also includes; Determining a damaged area of ​​the screen based on the damage location; Determine the expansion area based on the damaged area; Determine the curvature coefficient of the expanded area according to the curvature of the screen; The preset unfolding device is controlled to unfold according to the curvature coefficient.

7. A dynamic grading screen method for ultrasonic vibrating screen according to claim 6, characterized in that: Also includes; Determine the curvature coefficient of the screen according to the rotation speed; Determine the rolling distance of the screen drum according to the degree of bending and the curvature coefficient; Control the rolling of the screen drum according to the rolling distance; Determine the telescopic distance according to the bending degree and curvature coefficient; The telescopic device is controlled to extend and retract according to the telescopic distance.

8. A dynamic grading screen method for ultrasonic vibrating screen according to claim 1, characterized in that: Also includes; Obtaining storage quality in a preset storage device; determining a mass change rate of the stored mass based on the stored mass; Determine the flow rate change rate of the material flow rate according to the material flow rate; Determine the rate difference according to the flow rate difference and the mass rate difference; When the rate of change difference is greater than a preset rate of change difference value, the screen humidity is obtained; Determine the vibration frequency of the screen according to the screen humidity; The vibration of the screen is controlled according to the vibration frequency of the screen to increase the screening speed.

9. A dynamic grading screen system for an ultrasonic vibrating screen, characterized in that: include: Acquisition module, used to obtain material flow rate, product information, screen image, telescopic length, guide rail position, storage quality and screen humidity; A memory for storing a program of a dynamic grading screen method for an ultrasonic vibrating screen according to any one of claims 1 to 8; The processor is used to load, execute and implement the program stored in the memory.

10. An intelligent terminal, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes a dynamic grading screen method for an ultrasonic vibration screen as claimed in any one of claims 1 to 8.

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