CN113953176A - Vibrating screen and control system thereof - Google Patents
Vibrating screen and control system thereof Download PDFInfo
- Publication number
- CN113953176A CN113953176A CN202111208172.4A CN202111208172A CN113953176A CN 113953176 A CN113953176 A CN 113953176A CN 202111208172 A CN202111208172 A CN 202111208172A CN 113953176 A CN113953176 A CN 113953176A
- Authority
- CN
- China
- Prior art keywords
- screen
- amplitude
- vibrating
- frequency
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005284 excitation Effects 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 3
- 239000004744 fabric Substances 0.000 claims description 11
- 238000013016 damping Methods 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims 1
- 238000012216 screening Methods 0.000 description 16
- 239000010426 asphalt Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000012615 aggregate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The present invention provides a vibrating screen comprising: the screen box is provided with an excitation system for providing vibration at the top, and a vibration output shaft of the excitation system is provided with an eccentric block; the screen box is characterized in that a plurality of layers of screen meshes are arranged in the screen box, a plurality of amplitude-changing mechanisms are arranged at the bottom of each layer of screen mesh, and the amplitude-changing mechanisms are used for enabling the screen meshes on different layers to have different amplitudes. The control system of the vibrating screen comprises a power supply for supplying power to the whole system, and is characterized by further comprising an input end, a controller and a frequency conversion system, wherein the input end is used for inputting information data of aggregate grading type, material and feeding quantity; the controller is used for outputting the optimal amplitude and frequency according to the input aggregate grading type, material and feeding amount information data and transmitting the optimal amplitude and frequency to the frequency conversion system; the frequency conversion system is used for executing vibration effect with optimal amplitude and frequency through the vibration motor.
Description
Technical Field
The invention belongs to the technical field of vibrating screen equipment, and particularly relates to a vibrating screen and a control system thereof.
Background
The asphalt mixing station is a complete set of equipment for stirring a mixture of coarse aggregate, fine aggregate, filler, asphalt and the like which are heated and dried at a certain temperature into a uniform mixture according to a designed mixing ratio, and is widely applied to infrastructure construction of expressways, urban roads, docks, airports and the like.
The vibrating screen is used as a key component for screening aggregate in the asphalt mixing station, and the screening performance of the vibrating screen directly influences the production quality and the production efficiency of the asphalt mixing station. The vibrating screen for asphalt mixing station is characterized by that it mainly utilizes vibration motor as vibration source to make vibration excitation, and two identical vibration motors fixed on the vibration beam are synchronously rotated in opposite directions, and the centrifugal forces produced by eccentric blocks mounted on the vibration motor at every moment when they are rotated are mutually superposed along the component forces of symmetrical surfaces of two motors, and the component forces along the planes of rotation centers of two motors are mutually offset so as to make the whole screen body supported on the vibration-damping spring make reciprocating linear vibration, and the material can be thrown up on the screen and simultaneously make forward linear motion, and the aggregate with several specifications can be produced by means of every screen, and the aggregate screened out from every screen can be discharged from every discharge hole, so that the screening operation can be implemented.
Present asphalt mixing station shale shaker screen frame formula structure as an organic whole commonly used, through rivet fixed connection between reel crossbeam and the curb plate, the longitudinal tensioning of pitch arc that each layer screen cloth formed along the crossbeam up end, no relative motion between each layer screen cloth, each layer screen cloth of during operation has same amplitude. The existing defects are that: each layer of screen has the same amplitude and fixed frequency, can not match the best amplitude and frequency to different aggregate gradation types, particle sizes, materials and treatment capacities, and in addition, the screen often appears the condition of stifled hole, and screening efficiency is low, and production quality can not satisfy the operation requirement.
In the prior art, the variable-frequency double-layer linear sieve provided by the invention patent with the patent number of 201420846985.5 comprises two layers of sieve boxes and two sets of excitation systems, wherein the upper layer of sieve box is positioned above the lower layer of sieve box, and the two layers of sieve boxes are independently controlled. The existing defects are that: although the two layers of vibrating sieves can have different amplitudes, the two layers of linear sieves belong to two vibrating systems and are provided with two excitation sources, so that the equipment investment is increased, the energy consumption is increased, and the application and popularization of the multilayer linear sieves are difficult. In the multi-amplitude vibrating screen proposed in patent No. 95219476.7, the screen bars made of spring steel are transversely installed in the screen box, so that the amplitude of the screen bars is superposed with the amplitude generated by the screen bars in addition to the amplitude of the vibrating motor, thereby obtaining multiple amplitudes of the screen box and enhancing the strength of the amplitudes. The existing defects are that: although the multi-amplitude vibrating screen is realized, the screen bars are difficult to apply to high-precision screening of asphalt mixing stations and the like, the spring steel is high in cost, the service life of the screen bars is short, and the phase change increases the cost. The patent No. 200920014715.7 discloses a multi-amplitude vibrating screen, which comprises a rapping device arranged at the bottom of a screen, wherein an electromagnet attracts an armature of a symmetric support arm of a vibrating hammer, so that the screen with different meshes can work under different amplitude conditions under the action of the same exciting force. Different amplitudes of each layer of screen are realized by vibrating the screen through an electromagnetic control vibrating device, and because the working environment of the vibrating screen for the asphalt mixing station is severe, the dust is more, and the reliability of electromagnetic control is low; when the vibrating screen is used for screening, the aggregate is shuttled between the screen meshes from top to bottom, an electromagnetic control circuit is difficult to arrange in the screen body, and the aggregate collides the circuit, so that the service life of the circuit is shortened; the vibrating screen reduces the service life of the screen and increases the replacement frequency of the screen.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a vibrating screen which solves the problem that the vibrating screen is fixed in amplitude and frequency and cannot aim at the optimal amplitude and frequency matched with different aggregate grading types, aggregate materials and treatment amounts.
In order to solve the technical problem, the invention provides a vibrating screen, which comprises: the screen box is provided with an excitation system for providing vibration at the top, and a vibration output shaft of the excitation system is provided with an eccentric block; the screen box is characterized in that a plurality of layers of screen meshes are arranged in the screen box, a plurality of amplitude-changing mechanisms are arranged at the bottom of each layer of screen mesh, and the amplitude-changing mechanisms are used for enabling the screen meshes on different layers to have different amplitudes.
Further, the excitation system includes vibrating motor, vibrating motor's output shaft is equipped with first eccentric block and second eccentric block, first eccentric block and second eccentric block are used for adjusting the focus of output shaft.
Furthermore, a retainer ring for preventing the first eccentric block and the second eccentric block from falling off is arranged at the end part of the output shaft.
Furthermore, the first eccentric block and the second eccentric block are in a fan shape, and scale marks are marked on the edges of the first eccentric block and the second eccentric block.
Furthermore, the vibration excitation system further comprises a vibration excitation cross beam flange, a high-strength bolt and a vibration excitation cross beam, a side plate is arranged at the top of the screen box and connected with the vibration excitation cross beam flange, the vibration excitation cross beam is arranged on the vibration excitation cross beam flange through the high-strength bolt, and the vibration excitation cross beam flange is connected with the vibration motor.
Furthermore, the amplitude variation mechanism comprises a supporting beam, amplitude variation flanges used for being connected with the screen box are respectively arranged at two ends of the supporting beam, and an amplitude variation device used for being connected with the screen is arranged on the supporting beam.
Further, the amplitude changing device comprises a screen mesh supporting plate used for connecting the screen mesh, and the screen mesh supporting plate is arranged on the supporting cross beam through bolts and nuts.
Further, the end of the bolt is provided with a cotter pin for limiting the movement of the nut.
Further, the screen box comprises a vibration damping device arranged on the screen box.
Further, still including locating intermediate beam and overspeed device tensioner in the sieve case, screen cloth one end is connected the intermediate beam, and the other end is connected overspeed device tensioner.
Furthermore, the control system of the vibrating screen comprises a power supply for supplying power to the whole system, and is characterized by also comprising an input end, a controller and a frequency conversion system, wherein the input end is used for inputting information data of aggregate grading type, material and feeding quantity; the controller is used for outputting the optimal amplitude and frequency according to the input aggregate grading type, material and feeding amount information data and transmitting the optimal amplitude and frequency to the frequency conversion system; the frequency conversion system is used for executing vibration effect with optimal amplitude and frequency through the vibration motor.
Compared with the prior art, the invention has the following beneficial effects:
(1) the control system is used for realizing efficient matching of amplitude and frequency aiming at different aggregate grading types, materials and treatment amounts, and improving the energy consumption efficiency and the screening efficiency of the vibrating screen;
(2) the amplitude changing device realizes that different layers of screens of a single excitation source have different amplitudes, improves the screening performance of the vibrating screen and improves the precision of finished aggregate;
(3) the amplitude changing device increases the relative displacement between the screen and the cross beam in the operation process of the vibrating screen, and can effectively avoid the occurrence of hole blocking;
(4) in the starting and stopping process of the vibrating screen, the frequency conversion system can quickly skip the resonance frequency, effectively avoid the resonance phenomenon and improve the handling capacity of the vibrating screen;
(5) the frequency conversion system can realize the soft start of the motor, protect the power circuit and save energy;
(6) the controller and the frequency conversion system change the simple start-stop control mode of the vibrating screen of the asphalt mixing station in the past, realize the high-efficiency matching of the main parameters such as amplitude and frequency, and improve the intelligent level of the asphalt mixing station.
Drawings
FIG. 1 is a schematic view of a vibrating screen;
FIG. 2 is a schematic diagram of a shock excitation system;
FIG. 3 is a schematic view of an eccentric block;
FIG. 4 is an enlarged view of a portion of the screen body;
FIG. 5 is a schematic view of a horn;
FIG. 6 is a schematic structural view of a luffing device;
FIG. 7 is a schematic diagram of a parameter matching control system.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
According to the vibrating screen and the control system thereof, the amplitude variation device, the vibration excitation system, the frequency conversion system and other three systems are matched to realize efficient matching of amplitude and frequency and realize efficient screening of asphalt mixtures. In addition, the amplitude changing device can realize the function that different layers of screens of a single excitation source have different amplitudes, and effectively avoids the hole blocking phenomenon. The vibration screen rapidly passes through a resonance area in the starting and stopping process through the frequency conversion system, and the damage of resonance to the screen body is reduced.
Finding the relationship between the amplitude and the frequency and the screening efficiency under the working condition of the combination of the common aggregate material type, the aggregate grading type and the handling capacity to obtain the amplitude and the frequency which correspond to the highest screening efficiency under the working condition of the combination of the common aggregate material type, the aggregate grading type and the handling capacity, establishing a corresponding relationship table between the combination of the common aggregate material type, the aggregate grading type and the handling capacity and the optimal amplitude and frequency,
the optimum amplitude and frequency have a definite corresponding relation with the included angle of the eccentric block in the vibrating screen, and a corresponding relation table of the combination of the common aggregate material type, the aggregate grading type and the handling capacity and the optimum included angle and frequency of the eccentric block is actually established and stored in the controller.
When the asphalt mixing station starts to work, information such as aggregate grading type, material quality and treatment capacity is manually input in advance, the controller can select the eccentric block included angle and frequency corresponding to the highest screening efficiency from the corresponding relation table, and on one hand, the controller can send signals of the optimal eccentric block included angle and the optimal frequency to a display system and project the signals on a screen of the display system;
on the other hand, the controller sends a signal with the optimal frequency to the frequency conversion system, the frequency conversion system automatically adjusts the frequency to the target frequency value, the process can also be completed through manual adjustment, and the manual mode is prior to the automatic mode. The adjustment of the optimal amplitude firstly requires an operator to obtain the information of the included angle of the optimal eccentric block from the display screen, and then the target included angle value of the eccentric block of the vibrating screen is accurately set by adjusting the eccentric block with scales (as shown in figure 4), so that the matching of the optimal amplitude and the optimal frequency is realized.
The patent provides a vibrating screen (as shown in attached figures 1 and 3), which realizes efficient matching of amplitude and frequency and efficient screening of asphalt mixtures by matching of an amplitude variation device, an excitation system, a frequency conversion system and the like.
Referring to fig. 1, the vibrating screen mainly comprises a screen box 1, a damping spring 2, a luffing mechanism 3, a middle beam 4, a side plate 5, an excitation system 6, a ring groove rivet 7, a screen 8, a tensioning device 9 and the like. The screen box 1 mainly comprises a frame structure and a sealing plate, and plays roles of supporting a screen body and sealing; the amplitude variation mechanism 3, the middle beam 4, the side plates 5, the excitation system 6 and the tensioning device 9 jointly form a main body structure of the vibrating screen and are connected with the screen box 1 through the damping springs 2; one end of the screen 8 is hooked on the middle beam 4, the other end is hooked on the tensioning device 9, and the screen 8 is tightly pressed on the amplitude variation mechanisms 3 and is of an arc structure.
The structure of the excitation system 6 is shown in figure 2, the excitation system 6 mainly comprises an excitation beam flange 6.1, a high-strength bolt 6.2, an excitation beam 6.3, a vibration motor 6.4 and the like, the excitation beam 6.3 is in an I-beam structure and is formed by welding high-strength steel plates, two ends of the excitation beam flange are respectively welded with one excitation beam flange 6.1, and the excitation beam flanges are respectively riveted on the left side plate 5 and the right side plate 5 of the vibrating screen through a ring groove rivet 7. The excitation beam 6.3 is provided with a mounting hole, and the vibration motor 6.4 is fixed on the motor base of the excitation beam 6.2 by four high-strength bolts 6.2; a frequency conversion system (a parameter matching control system block diagram is shown in figure 7) is arranged between the vibrating motor 6.4 and the controller, and the frequency of the vibrating screen can be controlled manually or automatically.
An eccentric block with scales is arranged in a vibrating motor 6.4 (shown in attached figure 3), and mainly comprises a motor power output shaft 6.4.1, an eccentric block with scales 6.4.2, a retainer ring 6.4.3, scales 6.4.4, a bolt 6.4.5 and the like, wherein the scales 6.4.4 are accurate to 1 degree, and each 5-degree large grid is convenient and quick to position; the two eccentric blocks 6.4.2 with scales are of fan-shaped sheet structures, the circle center is provided with a hole, a groove is formed in one fan-shaped edge, a hole is drilled (as shown in the attached drawing 3), the two eccentric blocks 6.4.2 with scales are sequentially sleeved on the power output shaft 6.4.1 of the motor and are fastened by bolts 6.4.5, and the check rings 6.4.3 are installed, so that the two eccentric blocks 6.4.2 with scales are prevented from moving and falling off under the action of centrifugal force.
The eccentric block can accurately set the included angle of the eccentric block by utilizing the scales. The included angle is 30-150 degrees,
when the aggregate grading type, the aggregate quality and the aggregate treatment capacity are changed, the purpose of adjusting the amplitude is realized by readjusting the included angle of the eccentric block. The specific adjusting process is as follows: and manually updating information such as aggregate grading type, material quality and treatment capacity, automatically selecting the eccentric block included angle corresponding to the highest screening efficiency from the corresponding relation table by the controller, sending the information to a display system, loosening one of the bolts 6.4.5 with the eccentric block 6.4.2 after an operator obtains the included angle of the eccentric block 6.4.2 with the scale, rotating the bolt to a target included angle around a power output shaft 6.4.1 of the motor, and fastening the bolt to finish the adjustment of the optimal included angle of the eccentric block 6.4.2 with the scale. Thereby achieving optimum amplitude matching.
The amplitude variation mechanism 3 (as shown in figure 5) mainly comprises an amplitude variation flange 3.1, a supporting beam 3.2, an amplitude variation device 3.3 and the like, wherein the two amplitude variation mechanism flanges 3.1 are respectively welded at two ends of the supporting beam 3.2, and the amplitude variation mechanism 3 and the side plate 5 are tightly riveted together through a ring groove rivet 7. Each amplitude variation mechanism 3 is provided with a plurality of amplitude variation devices 3.3 which mainly comprise a screen mesh supporting plate 3.3.1, bolts 3.3.2, springs 3.3.3, nuts 3.3.4, cotter pins 3.3.5 and the like, wherein the screen mesh supporting plate 3.3.1 is a square block-shaped steel plate, the middle of the steel plate is provided with an opening, and the contact surface of the steel plate and the screen mesh is provided with a counter bore to prevent the bolts from directly acting on the screen mesh; the screen supporting plate 3.3.1 plays a role of supporting the screen, the upper surface has radian which is the same as the radian of the screen, and stress concentration under the action of aggregate is reduced; the bolt 3.3.2 sequentially penetrates through the screen mesh supporting plate 3.3.1, the spring 3.3.3 and the supporting beam 3.2, is fastened through the nut 3.3.4 and is locked by the cotter pin 3.3.5, and the nut 3.3.4 is prevented from falling off; the supporting beam 3.2 is a U-shaped beam with a downward opening, so that the amplitude variation device 3.3 is convenient to mount.
Install the device 3.3 that becomes width of cloth between supporting beam 3.2 and screen cloth 8 (as shown in fig. 5, fig. 6), innerspring 3.3.3 can design different rigidity coefficient k, k and the aperture, the quality proportional relation of corresponding layer screen cloth 8, the aperture of screen cloth 8 is big, the quality is less, k value is less (large granule material needs big amplitude, small granule material needs little amplitude), k value and screen cloth 8 aperture, quality relation are:
wherein alpha is the checking coefficient of the screen mesh mass, beta is the checking coefficient of the screen mesh 8 aperture, m is the screen mesh mass,
is the aperture of the screen 8.
The amplitude value increased by the amplitude variation mechanism 3 is about 0.1-0.5 times of the optimal amplitude of the vibrating screen, the proportion of the amplitude to the optimal amplitude is small, the screening performance of the original system is not damaged, the function that different layers of screens of a single excitation source have different amplitudes is realized, the screening performance of the vibrating screen is improved, and the grading precision of finished aggregates is improved;
when the whole screen body linearly reciprocates along the excitation direction along with the vibration motor 6.4, the screen 8 has relative motion relative to the supporting beam 3.2, so that the relative displacement between the screen 8 and the supporting beam 3.2 in the operation process of the vibrating screen is increased, the hole blocking phenomenon is effectively avoided, and meanwhile, the handling capacity of the vibrating screen can be improved.
Embodiment 2:
in the embodiment 1, the vibration motor 6.4 is used as an excitation source, and the excitation source can also be a motor or a power source such as a motor and a power output shaft, and drives the eccentric blocks such as the eccentric block and the eccentric shaft through a transmission mode such as a belt, a chain and a gear. The eccentric mass may be sector shaped, elliptical, etc. The transmission shaft can be a double-shaft, a four-shaft, an eight-shaft and other symmetrically-arranged shafts.
The spring 3.3.3 in embodiment 1 may also be a device having an elastic recovery function such as a rubber spring, a belleville spring, a plate spring, a composite spring, or the like;
in embodiment 1, the frequency is changed by a frequency converter, and the frequency conversion mode can also change the rotation speed of the transmission shaft by changing the transmission ratio between the power source and the transmission shaft, so as to change the excitation frequency.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (11)
1. A shaker screen, comprising: the screen box (1), the top of the screen box (1) is provided with an excitation system (6) for providing vibration, and a vibration output shaft of the excitation system (6) is provided with an eccentric block; the screen box is characterized in that a plurality of layers of screen meshes (8) are arranged in the screen box (1), a plurality of amplitude-changing mechanisms (3) are arranged at the bottom of each layer of screen mesh (8), and the amplitude-changing mechanisms (3) are used for enabling the screen meshes (8) on different layers to have different amplitudes.
2. The vibrating screen according to claim 1, characterised in that the excitation system (6) comprises a vibrating motor (6.4), the output shaft (6.4.1) of the vibrating motor (6.4) being provided with a first eccentric mass (6.4.2) and a second eccentric mass (6.4.4), the first eccentric mass (6.4.2) and the second eccentric mass (6.4.4) being used to adjust the centre of gravity of the output shaft (6.4.1).
3. The vibrating screen according to claim 2, characterised in that the end of the output shaft (6.4.1) is provided with a collar (6.4.3) for preventing the first eccentric mass (6.4.2) and the second eccentric mass (6.4.4) from falling out.
4. The vibrating screen of claim 2, characterised in that the first eccentric mass (6.4.2) and the second eccentric mass (6.4.4) are sector-shaped, marked with graduation marks at their edges.
5. The vibrating screen of claim 2, wherein the excitation system (6) further comprises an excitation beam flange (6.1), a high-strength bolt (6.2) and an excitation beam (6.3), a side plate (5) is arranged at the top of the screen box (1), the excitation beam flange (6.1) is connected with the side plate (5), the excitation beam (6.3) is arranged on the excitation beam flange (6.1) through the high-strength bolt (6.2), and the excitation beam flange (6.1) is connected with the vibrating motor (6.4).
6. The vibrating screen according to claim 1, characterized in that the luffing mechanism (3) comprises a supporting crossbeam (3.2), both ends of the supporting crossbeam (3.2) are respectively provided with a luffing flange (3.1) for connecting the screen box (1), and the supporting crossbeam (3.2) is provided with a luffing device (3.3) for connecting the screen cloth (8).
7. The vibrating screen according to claim 6, characterised in that the luffing device (3.3) comprises a screen carrier (3.3.1) for connecting the screen (8), which screen carrier (3.3.1) is provided on the supporting beam (3.2) by means of bolts (3.3.2) and nuts (3.34).
8. Vibrating screen according to claim 7, characterised in that the end of the bolt (3.3.2) is provided with a split pin (3.3.5) for limiting the movement of the nut (3.34).
9. The vibrating screen of claim 1, further comprising a vibration damping device (2) provided to the screen box (1).
10. The vibrating screen according to claim 1, further comprising an intermediate beam (4) and a tensioning device (9) arranged in the screen box (1), wherein one end of the screen cloth (8) is connected with the intermediate beam (4) and the other end is connected with the tensioning device (9).
11. The control system of the vibrating screen according to any one of claims 1 to 10, comprising a power supply for supplying power to the whole system, and further comprising an input end, a controller and a frequency conversion system, wherein the input end is used for inputting information data of aggregate grading type, material and feeding amount; the controller is used for outputting the optimal amplitude and frequency according to the input aggregate grading type, material and feeding amount information data and transmitting the optimal amplitude and frequency to the frequency conversion system; the frequency conversion system is used for executing vibration effect with optimal amplitude and frequency through the vibration motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208172.4A CN113953176A (en) | 2021-10-18 | 2021-10-18 | Vibrating screen and control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111208172.4A CN113953176A (en) | 2021-10-18 | 2021-10-18 | Vibrating screen and control system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113953176A true CN113953176A (en) | 2022-01-21 |
Family
ID=79465009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111208172.4A Pending CN113953176A (en) | 2021-10-18 | 2021-10-18 | Vibrating screen and control system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113953176A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333292A (en) * | 2022-10-13 | 2022-11-11 | 新乡市通用电机有限公司 | High-frequency vibration motor |
| CN117696191A (en) * | 2024-02-05 | 2024-03-15 | 江西源春环保科技有限公司 | Vibration crushing equipment and application thereof in garbage classification and recycling treatment |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1835327C (en) * | 1986-12-04 | 1993-08-23 | Академия Строительства Гдр | Vibratory grating |
| CN101337222A (en) * | 2008-08-07 | 2009-01-07 | 汪天子 | Multilayer, multi-frequency, multi-amplitude vibration-net grading sieve |
| CN201966734U (en) * | 2010-10-15 | 2011-09-07 | 卧龙电气集团股份有限公司 | Sector eccentric block adjustment mechanism for vibration motor |
| CN203380084U (en) * | 2013-06-28 | 2014-01-08 | 新乡市格林实业发展有限公司 | Vibration screen |
| CN203459266U (en) * | 2013-08-09 | 2014-03-05 | 三峡大学 | Surface vibrator with adjustable excitation force |
| CN204107833U (en) * | 2014-09-03 | 2015-01-21 | 杭州群利明胶化工有限公司 | A kind of Anti-blocking structure of spin vibration sieve |
| CN205032376U (en) * | 2015-10-10 | 2016-02-17 | 北京天瑞恒矿业设备有限公司 | Belt screen face adheres to circular vibrating screen controlling means of vibrator |
| CN106411035A (en) * | 2016-10-25 | 2017-02-15 | 卧龙电气集团股份有限公司 | Vibration motor eccentric block assembly with vibration force adjusting indication board |
| CN106964537A (en) * | 2017-05-03 | 2017-07-21 | 徐工集团工程机械有限公司 | Distribution device, vibratory sieve and asphalt mixing plant |
| CN113333274A (en) * | 2021-06-02 | 2021-09-03 | 新乡市胜宇机电有限公司 | Multi-frequency vibrating screen and screening system using same |
-
2021
- 2021-10-18 CN CN202111208172.4A patent/CN113953176A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1835327C (en) * | 1986-12-04 | 1993-08-23 | Академия Строительства Гдр | Vibratory grating |
| CN101337222A (en) * | 2008-08-07 | 2009-01-07 | 汪天子 | Multilayer, multi-frequency, multi-amplitude vibration-net grading sieve |
| CN201966734U (en) * | 2010-10-15 | 2011-09-07 | 卧龙电气集团股份有限公司 | Sector eccentric block adjustment mechanism for vibration motor |
| CN203380084U (en) * | 2013-06-28 | 2014-01-08 | 新乡市格林实业发展有限公司 | Vibration screen |
| CN203459266U (en) * | 2013-08-09 | 2014-03-05 | 三峡大学 | Surface vibrator with adjustable excitation force |
| CN204107833U (en) * | 2014-09-03 | 2015-01-21 | 杭州群利明胶化工有限公司 | A kind of Anti-blocking structure of spin vibration sieve |
| CN205032376U (en) * | 2015-10-10 | 2016-02-17 | 北京天瑞恒矿业设备有限公司 | Belt screen face adheres to circular vibrating screen controlling means of vibrator |
| CN106411035A (en) * | 2016-10-25 | 2017-02-15 | 卧龙电气集团股份有限公司 | Vibration motor eccentric block assembly with vibration force adjusting indication board |
| CN106964537A (en) * | 2017-05-03 | 2017-07-21 | 徐工集团工程机械有限公司 | Distribution device, vibratory sieve and asphalt mixing plant |
| CN113333274A (en) * | 2021-06-02 | 2021-09-03 | 新乡市胜宇机电有限公司 | Multi-frequency vibrating screen and screening system using same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115333292A (en) * | 2022-10-13 | 2022-11-11 | 新乡市通用电机有限公司 | High-frequency vibration motor |
| CN117696191A (en) * | 2024-02-05 | 2024-03-15 | 江西源春环保科技有限公司 | Vibration crushing equipment and application thereof in garbage classification and recycling treatment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113953176A (en) | Vibrating screen and control system thereof | |
| CN102120214B (en) | Three-degree-of-freedom series and parallel connection vibrating screen | |
| CN103394461B (en) | Series-parallel vibrating screen with five degrees of freedom | |
| CN103658026B (en) | Variable-freedom-degree parallel connection vibration sieve | |
| CN106964537B (en) | Distributing device, vibrating screen and asphalt mixing station | |
| CN101357364A (en) | Anti-resonance vibrating sifter | |
| CN201431961Y (en) | Variable-elliptic-orbit equal-thickness vibrating screen | |
| CN100455363C (en) | Discrete carpolite grading plant | |
| CN201410466Y (en) | Light round vibrating screen | |
| CN107008645A (en) | Inclined double-deck excited vibration screen device | |
| CN103769362B (en) | A kind of vibratory sieve | |
| KR200379512Y1 (en) | Sand production device by sand screen | |
| CN1277567A (en) | Method and device for vibration screening | |
| US5397002A (en) | Variable control screen apparatus | |
| US8631945B1 (en) | Method for screening fine industrial minerals using a vibrating high speed screening unit | |
| CN212189961U (en) | Suspension type dish coupling vibration screening machine | |
| CN116967122A (en) | Portable sand gravel aggregate test screening machine | |
| CN108906600B (en) | High-frequency vibrating screen | |
| CN217222354U (en) | Double-shaft self-synchronizing elliptical relaxation sieve | |
| CN216606051U (en) | Vibration screening device | |
| CN201997472U (en) | Serial connection sieve box vibration sieve | |
| CN210304472U (en) | Crawler-type self-walking mobile screening station | |
| CN103128050A (en) | Multistage linear screening machine | |
| CN201625630U (en) | Circular vibrating screen | |
| CN112474289A (en) | Linear vibrating screen with adjustable amplitude and vibration direction angle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220121 |