Novel vibrating screen device and screening method

Abstract

The invention discloses a novel vibrating screen device which comprises a supporting system. The vibration system is arranged on the supporting system in a vibration manner; the grading screening system comprises an upper-layer screen and a lower-layer screen, and the upper-layer screen and the lower-layer screen are fixedly arranged in the vibration system and used for conducting grading screening on the fed materials; the upper-layer screen comprises a front-side screen plate and a rear-side screen plate which are arranged in the feeding direction, and the upper-layer shaft is rotatably arranged in the vibration system; the upper-layer driving system is fixed on the supporting system, one end of the upper-layer driving system is fixedly connected with one end of the rear-side screen plate, and the upper-layer driving system is used for periodically changing the amplitude of the upper-layer screen; the integral driving system is fixed on the supporting system, one end of the integral driving system is fixedly connected with one end face of the vibration system, and the integral driving system is used for driving the vibration system to vibrate integrally. The upper-layer screen and the lower-layer screen adopt different driving modes, the upper-layer screen is driven by the cam mechanism, and the amplitude of the upper-layer screen can be changed independently and more easily so as to adapt to screening of different ore particles.

Description

Technical Field

[0001] The present invention belongs to the field of mine screening machinery, and in particular relates to a novel vibrating screen device and a screening method. Background Art

[0002] A vibrating screen is a mechanical device that uses a vibrating machine to drive a screen to screen materials. Vibration generated by an exciter causes the material to jump, roll, or slide on the screen surface, thereby achieving separation by particle size. Double-deck vibrating screens, with two layers of screens with different mesh sizes, can screen materials twice simultaneously, improving screening efficiency and accuracy. They are now widely used in industries such as mining, building materials, chemicals, metallurgy, and coal.

[0003] However, existing double-deck vibrating screens have fixed screens on both sides, relying on the vibration of the screen frame and the entire machine to separate materials. However, the vibration amplitude of the vibrating screen is relatively small, resulting in low screening efficiency. Furthermore, current vibrating screens typically have material entering the screen at the feed end and exiting at the discharge end, making the transition from feed to discharge prone to clogging. Therefore, new vibrating screen structures are needed. Summary of the Invention

[0004] In view of the technical problems in the prior art, a new vibrating screen device is provided, the device comprising; Support system, fixed on the ground; a vibration system, vibratingly mounted on the support system; A grading screening system, comprising an upper screen and a lower screen, wherein the upper screen and the lower screen are fixedly mounted in the vibration system and are used for grading and screening the feed; The upper screen comprises a front screen plate and a rear screen plate along the feeding direction, wherein the front screen plate and the rear screen plate are fixed by welding via an upper shaft, and the upper shaft is rotatably arranged in the vibration system; An upper driving system is fixed on the support system, one end of which is fixedly connected to one end of the rear screen plate, and is used to periodically change the amplitude of the upper screen; The overall driving system is fixed on the supporting system, one end of which is fixedly connected to one end surface of the vibration system, and is used to drive the vibration system to vibrate as a whole.

[0005] Furthermore, the support system includes: a base comprising a pair of spaced-apart bottom platforms; The upper end surface of the bottom platform is provided with a plurality of groups of lower spring bases, springs and upper spring bases in sequence; The frame includes a middle platform and an upper platform, wherein the middle platform and the upper platform are respectively arranged on the bottom platform, the upper end of the middle platform is fixed to one end surface of the side of the vibration system, and one end of the upper platform is fixed to one end surface of the other side of the vibration system; the upper drive system is fixed to the upper end of the upper platform; the overall drive system is fixed to the upper end of the middle platform; the vibration system is vibrably arranged between the middle platform and the upper platform; The middle platform is also provided with a bearing seat, which is cooperatively connected with the upper shaft.

[0006] Furthermore, the vibration system includes: The screen box is square in shape and fixed on the lower spring base, with an open top and symmetrical openings on the sides; A plurality of cross beams are arranged in the screen box, and the lower screen is fixed in the screen box through the cross beams.

[0007] Furthermore, the grading and screening system includes: The sieve holes of the front sieve plate of the upper sieve are larger than the sieve holes of the rear sieve plate;

[0008] The sieve holes of the rear sieve plate are larger than the sieve holes of the lower sieve.

[0009] Furthermore, the lower screen includes a front inclined plate and a rear straight plate fixed together, and the front inclined plate is tilted to guide the material to the rear straight plate.

[0010] Furthermore, the upper drive system includes: a first drive motor, fixed to the upper platform; a cam, drivably connected to the first drive motor; a crankshaft, key-connected to the cam; a connecting rod, one end of which is hinged to one end of the crankshaft; an upper connector, one end of which is fixed to the other end of the connecting rod; One end of the lower connecting head is hinged to the other end of the upper connecting head, and the other end is fixed to the rear screen plate.

[0011] Furthermore, the overall drive system includes: A second driving motor is fixed on the middle platform; a universal joint connected to the output shaft pin of the second drive motor; a lower shaft, one end of which is pin-connected to the other end of the universal joint; An eccentric block, one end of which is pin-connected to the other end of the lower shaft; The flange is sleeved on the lower shaft and fixed to the other end of the eccentric block, and is fixedly connected to the screen box by bolts.

[0012] A screening method for the novel vibrating screen device described above, comprising: Step S1: Turn on the second drive motor, the second drive motor drives the universal joint to rotate, and the universal joint drives the eccentric block to generate an exciting force to vibrate the screen box; Step S2: Turn on the first drive motor, which drives the cam to rotate. The cam drives the crankshaft and the connecting rod in turn, thereby driving the rear screen plate to move back and forth linearly, thereby driving the upper screen to swing back and forth. Step S3: introducing the ore particles to be screened to the front sieve plate of the upper sieve, and during the reciprocating swing of the upper sieve, introducing the ore particles to the rear sieve plate for secondary screening; Step S4: The lower screen receives the ore particles after the secondary screening and performs final screening to obtain the ore particles after the final screening.

[0013] The positive progress effect of the present invention is:

[0014] 1) The upper and lower screens of the present invention adopt different driving modes. The upper screen is driven by a cam mechanism, which can easily change the amplitude of the upper screen to adapt to the screening of different ore particles.

[0015] 2) Because the apertures of the front and rear sieve plates of the upper screen are different in size, with the front sieve plate having larger apertures, once ore particles pass through the upper screen, the screening efficiency of the lower screen, as well as the overall vibrating screen, is not affected by the length of the screen. Furthermore, the present invention, taking advantage of the characteristics of the cam mechanism, sets different apertures on the left and right sides of the upper screen connected to the cam mechanism, enabling a pre-stage screening process, further improving screening efficiency while saving space.

[0016] 3) The impact of ore particles is relatively large during feeding, and the front and rear sieve plates of the upper screen are connected to the upper shaft. When the feed particles impact the middle shaft, the impact on the screen blockage and bearing capacity is minimal, thereby improving screening performance.

[0017] 4) The external eccentric block is easier to balance weight and convenient for maintenance, installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a novel vibrating screen device of the present invention.

[0019] Figure 2 The figure is a schematic structural diagram of the upper driving mechanism of a novel vibrating screen device of the present invention.

[0020] Figure 3This is a schematic diagram of the upper screen structure of a new type of vibrating screen device of the present invention.

[0021] Figure 4 This is a schematic diagram of the screen structure of a new type of vibrating screen device of the present invention.

[0022] Figure 5 This is a schematic diagram of the lower shaft and flange structure of a new type of vibrating screen device of the present invention. DETAILED DESCRIPTION

[0023] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0024] In order to better explain the present invention, so as to facilitate understanding, the following Figures 1 to 5 , the present invention is described in detail through specific implementation methods.

[0025] A novel vibrating screen device, the device comprising; Support system, fixed on the ground; a vibration system, vibratingly mounted on the support system; A grading screening system, comprising an upper screen 301 and a lower screen 302, wherein the upper screen 301 and the lower screen 302 are fixedly mounted in the vibration system and are used to grade and screen the feed; The upper screen 301 includes a front screen plate and a rear screen plate along the feeding direction, the front screen plate and the rear screen plate are fixed by welding through an upper shaft, and the upper shaft 407 is rotatably arranged in the vibration system; An upper driving system is fixed on the support system, one end of which is fixedly connected to one end of the rear screen plate, and is used to periodically change the amplitude of the upper screen; The overall driving system is fixed on the supporting system, one end of which is fixedly connected to one end surface of the vibration system, and is used to drive the vibration system to vibrate as a whole.

[0026] Furthermore, the support system includes: The base 101 includes a pair of bottom platforms spaced apart from each other; The upper end surface of the bottom platform is provided with a plurality of groups of lower spring bases 105, springs 202 and upper spring bases 104 in sequence; The frame 102 includes a middle platform and an upper platform, wherein the middle platform and the upper platform are respectively arranged on the bottom platform, the upper end of the middle platform is fixed to one end surface of the side of the vibration system, and one end of the upper platform is fixed to one end surface of the other side of the vibration system; the upper drive system is fixed to the upper end of the upper platform; the overall drive system is fixed to the upper end of the middle platform; the vibration system is vibrably arranged between the middle platform and the upper platform; A bearing seat 103 is also provided on the middle platform, and the bearing seat 103 is cooperatively connected with the upper shaft 407 .

[0027] Furthermore, the vibration system includes: The screen box 201 is square in shape and fixed on the lower spring base 105, with an open top and symmetrical openings on the sides; A plurality of cross beams 203 are provided in the screen box 201 , and the lower screen 302 is fixed in the screen box via the cross beams 203 .

[0028] Furthermore, the grading and screening system includes: The mesh holes of the front sieve plate of the upper sieve 301 are larger than the mesh holes of the rear sieve plate; The mesh holes of the rear sieve plate are larger than the mesh holes of the lower sieve 302 .

[0029] Furthermore, the lower screen 302 includes a front inclined plate and a rear straight plate fixed together, and the front inclined plate is tilted to guide the material to the rear straight plate.

[0030] Furthermore, the upper drive system includes: A first drive motor 401 is fixed on the upper platform; A cam 402 drivably connected to the first drive motor 401 ; The crankshaft 403 is key-connected to the cam 402; A connecting rod 404, one end of which is hinged to one end of the crankshaft 403; An upper connector 405 , one end of which is fixed to the other end of the connecting rod 404 ; One end of the lower connecting head 406 is hinged to the other end of the upper connecting head 405, and the other end is fixed to the rear sieve plate.

[0031] Furthermore, the overall drive system includes: The second driving motor 501 is fixed on the middle platform; A universal joint 502 connected to the output shaft pin of the second driving motor 501; The lower shaft 504 has one end connected to the other end of the universal joint 502 by a pin; An eccentric block 503, one end of which is pin-connected to the other end of the lower shaft 504; The flange 505 is sleeved on the lower shaft 504 and fixed to the other end of the eccentric block 503 , and is fixedly connected to the screen box 201 by bolts.

[0032] A screening method for the novel vibrating screen device described above, comprising: Step S1: Turn on the second drive motor, the second drive motor drives the universal joint to rotate, and the universal joint drives the eccentric block to generate an exciting force to vibrate the screen box; Step S2: Turn on the first drive motor, which drives the cam to rotate. The cam drives the crankshaft and the connecting rod in turn, thereby driving the rear screen plate to move back and forth linearly, thereby driving the upper screen to swing back and forth. Step S3: introducing the ore particles to be screened to the front sieve plate of the upper sieve, and during the reciprocating swing of the upper sieve, introducing the ore particles to the rear sieve plate for secondary screening; Step S4: The lower screen receives the ore particles after the secondary screening and performs final screening to obtain the ore particles after the final screening.

[0033] Working principle of the present invention:

[0034] The first and second drive motors are turned on. The second drive motor sequentially drives the universal joint, the lower shaft, and the eccentric block, which vibrates the screen box. The first drive motor drives the cam to reciprocate, driving the rear screen plate to swing back and forth. Because the mesh openings of the front and rear screen plates are inconsistent, the reciprocating motion of the upper screen after feeding essentially performs multi-level screening without changing the size of the screen box. Ore particles have a large impact force during feeding, and the front and rear screen plates of the upper screen are connected to the upper shaft. When the feed particles impact the intermediate shaft, they have little effect on screen blockage and load-bearing capacity, thereby improving screening performance.

[0035] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A novel vibrating screen device, characterized in that: The device comprises; A support system, fixed on the ground; a vibration system, vibratingly disposed on the support system; A grading screening system, comprising an upper screen and a lower screen, wherein the upper screen and the lower screen are fixedly arranged in the vibration system and are used for grading and screening the feed; The upper screen comprises a front screen plate and a rear screen plate along the feeding direction, wherein the front screen plate and the rear screen plate are fixed by welding through an upper shaft, and the upper shaft is rotatably arranged in the vibration system; An upper driving system is fixed on the supporting system, one end of which is fixedly connected to one end of the rear screen plate, and is used to periodically change the amplitude of the upper screen; The overall driving system is fixed on the supporting system, one end of which is fixedly connected to an end surface of the vibration system, and is used to drive the vibration system to vibrate as a whole.

2. A novel vibrating screen device as claimed in claim 1, characterized in that: The support system comprises: a base, including a pair of lower platforms disposed at intervals; The upper end surface of the bottom platform is provided with a plurality of groups of lower spring bases, springs and upper spring bases in sequence; The frame comprises a middle platform and an upper platform, wherein the middle platform and the upper platform are respectively arranged on the bottom platform, the upper end of the middle platform is fixed to one end face of the side of the vibration system, and one end of the upper platform is fixed to one end face of the other side of the vibration system; the upper drive system is fixed to the upper end of the upper platform; the overall drive system is fixed to the upper end of the middle platform; the vibration system is vibratingly arranged between the middle platform and the upper platform; The middle platform is also provided with a bearing seat, and the bearing seat is cooperatively connected with the upper shaft.

3. A novel vibrating screen device as claimed in claim 2, characterized in that: The vibration system comprises: The screen box is square-shaped and fixed on the lower spring base, with an open top and symmetrical openings on the sides; A plurality of cross beams are arranged in the screen box, and the lower screen is fixed in the screen box through the cross beams.

4. A novel vibrating screen device as claimed in claim 3, characterized in that: The grading and screening system comprises: The mesh holes of the front sieve plate of the upper sieve are larger than the mesh holes of the rear sieve plate; The mesh holes of the rear sieve plate are larger than the mesh holes of the lower sieve.

5. A novel vibrating screen device as claimed in claim 4, characterized in that: The lower screen comprises a front inclined plate and a rear straight plate fixed together, wherein the front inclined plate is tilted and used for guiding the material to the rear straight plate.

6. A novel vibrating screen device as claimed in claim 4, characterized in that: The upper drive system comprises: A first driving motor is fixed on the upper platform; a cam, drivably connected to the first drive motor; A crankshaft, key-connected to the cam; A connecting rod, one end of which is hinged to one end of the crankshaft; An upper connecting head, one end of which is fixed to the other end of the connecting rod; One end of the lower connecting head is hinged to the other end of the upper connecting head, and the other end is fixedly connected to the rear screen plate.

7. A novel vibrating screen device as claimed in claim 4, characterized in that: The overall drive system comprises: A second driving motor is fixed on the middle platform; A universal joint connected to the output shaft pin of the second drive motor; A lower shaft, one end of which is pin-connected to the other end of the universal joint; An eccentric block, one end of which is pin-connected to the other end of the lower shaft; The flange is sleeved on the lower shaft and fixedly connected to the other end of the eccentric block, and is fixedly connected to the screen box by bolts.

8. A screening method for a novel vibrating screen device according to any one of claims 1 to 7, the method comprising: Step S1: Turn on the second drive motor, the second drive motor drives the universal joint to rotate, and the universal joint drives the eccentric block to generate an exciting force to vibrate the screen box; Step S2: Turn on the first drive motor, the first drive motor drives the cam to rotate, the cam drives the crankshaft and the connecting rod in turn, thereby driving the rear screen plate to reciprocate linearly, thereby driving the upper screen to swing reciprocatingly; Step S3: introducing the ore particles to be screened to the front screen plate of the upper screen, and during the reciprocating swing of the upper screen, introducing the ore particles to the rear screen plate for secondary screening; Step S4: The lower screen receives the ore particles after the secondary screening for final screening to obtain the ore particles after the final screening.

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