Anti-blocking vibrating screen for lithium iron phosphate

Abstract

The utility model belongs to the technical field of vibration screening, and discloses a lithium iron phosphate anti-blocking vibration screen which comprises a dustproof cover, a screen body and a vibration motor, the screen body comprises a screen body A and a screen body B, the dustproof cover, the screen body A and the screen body B are sequentially and fixedly connected from top to bottom, and the vibration motor is arranged at the bottom of the screen body B; a feed port is formed in the upper end of the dustproof cover; a discharge port is formed in one side, close to the bottom, of the screen body B; a pretreatment screen is arranged in the screen body A; a screening screen is arranged in the screen body B; a supporting screen is arranged below the screening screen and externally connected with an ultrasonic generator, and the supporting screen is used for transmitting ultrasonic waves generated by the ultrasonic generator to the screening screen. The two stages of screen meshes are matched for use, ultrasonic waves are conducted through surface contact of the supporting screen mesh and the screening screen mesh, the problem of screening blockage caused by ultrasonic wave conduction of traditional point / line contact is effectively solved, the screening efficiency is greatly improved, and the ultrasonic screening device is simple in structure and convenient to disassemble, assemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration screening, and in particular relates to a lithium iron phosphate anti-clogging vibration screen. Background Art

[0002] Lithium iron phosphate has the characteristics of low cost, high safety performance, and good cycle performance, and is increasingly favored in the field of power batteries and energy storage. However, according to the production process, the granulation process will be carried out before the secondary sintering of the precursor, and the physical properties of the raw materials will change from powder to block, which is easy to get clogged during screening, seriously affecting the screening efficiency and greatly extending the packaging time, thus affecting the entire production rhythm.

[0003] At present, most of the primary screening supports of ultrasonic vibrating screens used in the market are supported by ordinary steel plates after welding. The ultrasonic wave only acts on the lines after transmission. There are many losses in the ultrasonic process and the transmission effect is not good. The screening efficiency can only be increased by adjusting the frequency of the ultrasonic generator, which increases energy consumption and reduces the service life of the ultrasonic generator, and the effect of improving the screening efficiency is not obvious.

[0004] Therefore, it is necessary to design and upgrade the existing ultrasonic vibrating screen to further effectively improve the efficiency of lithium iron phosphate crushing and packaging. Utility Model Content

[0005] In order to solve the problems of serious blockage in screening of existing devices, limited effect of improving the efficiency of the vibrating screen by adjusting the frequency of the ultrasonic generator and large energy loss, and short service life of the ultrasonic generator, the utility model provides a lithium iron phosphate anti-blocking vibrating screen, which is used by arranging two-stage screens and transmitting ultrasonic waves through the contact between the supporting screen and the screening screen surface, effectively avoiding the screening blockage problem caused by traditional point / line contact ultrasonic conduction, greatly increasing the screening efficiency, and having a simple structure, and convenient disassembly and maintenance.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0007] A lithium iron phosphate anti-clogging vibrating screen, comprising a dust cover, a screen body and a vibration motor, wherein the screen body comprises a screen body A and a screen body B, the dust cover, the screen body A and the screen body B are fixedly connected in sequence from top to bottom, and the vibration motor is arranged at the bottom of the screen body B; a feed port is arranged at the upper end of the dust cover, and a discharge port is arranged at one side of the screen body B close to the bottom;

[0008] A pre-treatment screen is provided in the A screen body;

[0009] A screening screen is arranged in the B sieve body; a supporting screen is arranged below the screening screen, the supporting screen is externally connected to an ultrasonic generator, and the supporting screen is used to transmit the ultrasonic wave generated by the ultrasonic generator to the screening screen.

[0010] Furthermore, an A screen bracket is fixedly arranged in the A screen body, the pretreatment screen is arranged above the A screen bracket, and the outer edge of the pretreatment screen is fixedly arranged on the A screen bracket.

[0011] Furthermore, a B screen bracket is fixedly arranged in the B screen body, a supporting screen and a screening screen are fixedly arranged above the B screen bracket in sequence, and the outer edges of the supporting screen and the screening screen are fixedly arranged on the B screen bracket;

[0012] The B screen bracket is connected to the transducer via a screw, and the transducer is connected to the ultrasonic generator.

[0013] Furthermore, the B screen bracket is welded to one end of the screw rod, the other end of the screw rod is threadedly connected to the transducer, and the transducer is connected to the ultrasonic generator via an ultrasonic transmission line.

[0014] Furthermore, the supporting screen is installed on the B screen bracket by bonding or bolting.

[0015] Furthermore, one end of the screw rod connected to the B screen support extends to the center of the B screen support.

[0016] Furthermore, the mesh number of the supporting screen is smaller than the mesh number of the screening screen.

[0017] Furthermore, the screening screen adopts a 150-mesh screen, and the supporting screen adopts a 40-mesh screen.

[0018] Furthermore, an observation balance port is also provided at the upper end of the dust cover;

[0019] A slag discharge port is arranged on one side of the outer wall of the A sieve body, and the slag discharge port is arranged at the same height as the pretreatment sieve and is in conduction.

[0020] Furthermore, a base is provided at the bottom of the B screen body, the base is a cylindrical base, and the vibration motor is arranged in the base;

[0021] The bottom of the B sieve body is elastically connected to the edge of the base through a plurality of shock-absorbing springs, and the bottom of the B sieve body is fixedly connected to the vibration motor.

[0022] Compared with the prior art, the beneficial effects produced by the utility model are:

[0023] (1) The pretreatment screen provided in the A sieve body receives the material in the feed port and performs preliminary dispersion of the material; a supporting screen is provided under the screening screen of the B sieve body, the supporting screen is connected to the transducer through a screw, the transducer transmits ultrasonic waves to the supporting screen through the screw, and the supporting screen contacts the screening screen surface for ultrasonic wave transmission, thereby increasing the contact area between the ultrasonic wave transmission and the screening screen, so that the ultrasonic wave transmission changes from the traditional point / line contact to the surface contact, and the ultrasonic wave is more evenly distributed and diffused to the screening surface of the entire screening screen, effectively alleviating the blockage problem during screening, and greatly increasing the screening efficiency; the above screening structure design (the use of two-stage screens in combination, and the transmission of ultrasonic waves through the supporting screen contacting the screening screen surface) effectively improves the production efficiency of the lithium iron phosphate screening section, greatly shortens the time cost, and has a simple structure, convenient disassembly and assembly, and greatly reduces the maintenance cost;

[0024] (2) The supporting screen is installed on the B screen bracket by bonding or bolting, which is convenient for replacing the supporting screen. At the same time, the supporting screen mesh can be replaced according to different process requirements on site, which greatly increases the flexibility of the ultrasonic vibration screen efficiency adjustment method;

[0025] (3) The end of the screw rod of the utility model connected to the B screen bracket extends to the center of the B screen bracket, which can more effectively transmit ultrasonic waves and further ensure the screening effect and screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a lithium iron phosphate anti-clogging vibrating screen according to an embodiment of the utility model;

[0027] Explanation of markings in the figure: 1. Dust cover; 2. Sieve body A; 3. Sieve body B; 4. Ultrasonic generator; 5. Base; 6. Feed inlet; 7. Observation balance port; 8. Fastening clamp; 9. Slag discharge port; 10. Sieve bracket A; 11. Transducer; 12. Shock-absorbing spring; 13. Sieve bracket B; 14. Discharge port; 15. Motor; 16. Ultrasonic transmission line; 17. Pretreatment screen; 18. Eccentric hammer; 19. Support screen; 20. Screening screen; 21. Screw. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0031] Combination Figure 1 As shown, the embodiment of the utility model provides a lithium iron phosphate anti-clogging vibrating screen, including a dust cover 1, a screen body and a vibration motor, the screen body including an A screen body 2 and a B screen body 3, the dust cover 1, the A screen body 2 and the B screen body 3 are fixedly connected in sequence from top to bottom by a fastening clamp 8, and the vibration motor is arranged at the bottom of the B screen body 3, for driving the B screen body 3 and the A screen body 2 above it to vibrate together to screen materials; a feed port 6 is arranged at the upper end of the dust cover 1, and a discharge port 14 is arranged on the side near the bottom of the B screen body 3; a pretreatment screen 17 is arranged in the A screen body 2 for receiving and dispersing materials; a screening screen 20 is arranged in the B screen body 3 for screening materials; a supporting screen 19 is arranged below the screening screen 20, and the supporting screen 19 is externally connected to an ultrasonic generator 4, and the supporting screen 19 is used to conduct the ultrasonic wave generated by the ultrasonic generator 4 to the screening screen 20.

[0032] In the embodiment of the utility model, the pretreatment screen 17 arranged in the A screen body 2 receives the material in the feed port and preliminarily disperses the material; the ultrasonic wave is transmitted by the surface contact between the supporting screen 19 and the screening screen 20, thereby increasing the contact area between the ultrasonic wave transmission and the screening screen 20, so that the ultrasonic wave transmission is changed from the traditional point / line contact to the surface contact, and the ultrasonic wave is more evenly distributed and diffused to the screening surface of the entire screening screen, which effectively alleviates the blockage problem during screening and greatly increases the screening efficiency; the two-stage screen is used in combination, which effectively improves the production efficiency of the lithium iron phosphate screening section and greatly shortens the time cost; and the structure is simple, the disassembly and assembly are convenient, and the maintenance cost is also greatly reduced.

[0033] Specifically, an A screen bracket 10 is fixedly disposed in the A screen body 2 , the pretreatment screen 17 is disposed above the A screen bracket 10 , and the outer edge of the pretreatment screen 17 is fixedly disposed on the A screen bracket 10 .

[0034] The A screen bracket 10 plays the role of fixing and supporting the pretreatment screen 17, so as to prevent the pretreatment screen 17 from being damaged due to material accumulation, bursting and screening under the impact of the material entering from the feed port 6; the pretreatment screen 17 can receive the material entering from the feed port 6 and disperse the material so that the dispersed material falls into the B screen body below for screening, so as to avoid the problem of screening blockage caused by material agglomeration.

[0035] A B screen bracket 13 is fixedly arranged inside the B screen body 3, and a supporting screen 19 and a screening screen 20 are fixedly arranged above the B screen bracket 13 in sequence, and the outer edges of the supporting screen 19 and the screening screen 20 are fixedly arranged on the B screen bracket 13; the B screen bracket 13 is connected to the transducer 11 through a screw 21, and the transducer 11 is connected to the ultrasonic generator 4. Specifically, the B screen bracket 13 is welded to one end of the screw 21, and the other end of the screw 21 is threadedly connected to the transducer 11, and the transducer 11 is connected to the ultrasonic generator 4 through an ultrasonic conduction line 16.

[0036] The B screen support 13 also plays the role of fixing the upper screen and supporting the upper screen to prevent it from being damaged by the impact of the material. The B screen support 13 transmits the ultrasonic wave converted by the transducer 11 to the supporting screen 19 through the screw 21, and then transmits the ultrasonic wave through the surface contact between the supporting screen 19 and the screening screen 20, so that the ultrasonic wave is distributed more evenly and diffused to the screening surface of the entire screening screen 20, greatly increasing the screening efficiency.

[0037] Furthermore, in the embodiment of the utility model, one end of the screw 21 connected to the B screen support 13 extends to the center of the B screen support. The purpose of this arrangement is to effectively conduct ultrasonic waves and further ensure the screening effect and screening efficiency.

[0038] Furthermore, in the embodiment of the present utility model, the supporting screen 19 adopts a 40-mesh screen, and the screening screen 20 adopts a 150-mesh screen.

[0039] The supporting screen 19 only plays the role of ultrasonic wave conduction, and its screening effect is not considered. The screening effect is determined by the mesh number of the screening screen 20. The screening screen 20 adopts a 150-mesh screen, which is a fixed parameter for lithium iron phosphate screening packaging.

[0040] Under some other working conditions, the mesh number of the supporting screen 19 can be adjusted according to the working conditions to achieve a higher ultrasonic conduction vibration screening efficiency. During the adjustment process, ensure that the mesh number of the supporting screen 19 is smaller than the mesh number of the screening screen 20, which is conducive to the material after screening by the screening screen 20 to quickly and smoothly pass through the supporting screen 19 and discharge downward.

[0041] In the embodiment of the utility model, the support screen 19 is installed on the B screen bracket in the B screen body by bonding or bolting, so that the support screen 19 is convenient to replace and the maintenance is simple.

[0042] In addition, in the embodiment of the utility model, the upper end of the dust cover 1 is also provided with an observation balance port 7, which is used for human eyes to observe the pretreatment status of the pretreatment screen 17, and quickly check whether there are debris, lumps, material accumulation, and damage to the screen caused by material accumulation. At the same time, since the dust cover 1 is connected to the dust removal tower upstream, positive pressure gas will be injected into the dust removal tower, and the observation balance port 7 can also balance the air pressure in the sieve body. The observation balance port 7 can be directly opened or covered with a layer of filter cloth to balance the air pressure, or it can be connected to an air respirator to balance the air pressure in the sieve body.

[0043] In some other embodiments, two observation balance ports 7 are provided, which are respectively located on both sides of the feed port 6, so as to more comprehensively observe the material accumulation in the sieve body or the damage of the sieve.

[0044] At the same time, a slag discharge port 9 is provided on one side of the outer wall of the A sieve body 2. The slag discharge port 9 is at the same height as the pretreatment screen 17 and is connected to the slag discharge port 9 for discharging the impurities filtered by the pretreatment screen 17 to the slag discharge port 9 through centrifugal vibration and then discharged through the slag discharge port 9.

[0045] A base 5 is provided at the bottom of the B sieve body 3, and the base 5 is a cylindrical base. The vibration motor is arranged in the base 5. The bottom of the B sieve body 3 is elastically connected to the edge of the base 5 through a plurality of shock-absorbing springs 12, and the bottom of the B sieve body 3 is fixedly connected to the vibration motor.

[0046] The vibration motor includes a motor 15 and eccentric hammers 18 arranged at both ends of the motor 15. Its working principle is: the centrifugal force generated by the high-speed rotation of the driving shaft of the motor 15 and the eccentric hammer 18 is used to obtain an exciting force, thereby generating a vibration force to be transmitted to the screen body to screen materials.

[0047] The above description is only an embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement and improvement made within the scope of application of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium iron phosphate anti-clogging vibrating screen, characterized in that: It includes a dust cover, a sieve body and a vibration motor, the sieve body includes an A sieve body and a B sieve body, the dust cover, the A sieve body and the B sieve body are fixedly connected in sequence from top to bottom, and the vibration motor is arranged at the bottom of the B sieve body; the upper end of the dust cover is provided with a feed inlet, and the B sieve body is provided with a discharge port near the bottom side; A pre-treatment screen is provided in the A screen body; A screening screen is arranged in the B sieve body; a supporting screen is arranged below the screening screen, the supporting screen is externally connected to an ultrasonic generator, and the supporting screen is used to transmit the ultrasonic wave generated by the ultrasonic generator to the screening screen.

2. The vibrating screen according to claim 1, characterized in that: An A screen bracket is fixedly arranged in the A screen body, the pretreatment screen is arranged above the A screen bracket, and the outer edge of the pretreatment screen is fixedly arranged on the A screen bracket.

3. The vibrating screen according to claim 1, characterized in that: A B screen bracket is fixedly arranged in the B screen body, a supporting screen and a screening screen are fixedly arranged above the B screen bracket in sequence, and the outer edges of the supporting screen and the screening screen are fixedly arranged on the B screen bracket; The B screen bracket is connected to the transducer via a screw, and the transducer is connected to the ultrasonic generator.

4. The vibrating screen according to claim 3, characterized in that: The B screen bracket is welded to one end of the screw rod, and the other end of the screw rod is threadedly connected to the transducer, and the transducer is connected to the ultrasonic generator via an ultrasonic transmission line.

5. The vibrating screen according to claim 4, characterized in that: The supporting screen is installed on the B screen bracket by bonding or bolting.

6. The vibrating screen according to claim 4, characterized in that: One end of the screw rod connected to the B screen support extends to the center of the B screen support.

7. The vibrating screen according to any one of claims 1 to 6, characterized in that: The mesh number of the supporting screen is smaller than the mesh number of the screening screen.

8. The vibrating screen according to claim 7, characterized in that: The screening screen adopts a 150-mesh screen, and the supporting screen adopts a 40-mesh screen.

9. The vibrating screen according to claim 1, characterized in that: The upper end of the dust cover is also provided with an observation balance port; A slag discharge port is arranged on one side of the outer wall of the A sieve body, and the slag discharge port is arranged at the same height as the pretreatment sieve and is in conduction.

10. The vibrating screen according to claim 1, characterized in that: The bottom of the B sieve body is provided with a base, the base is a cylindrical base, and the vibration motor is arranged in the base; The bottom of the B sieve body is elastically connected to the edge of the base through a plurality of shock-absorbing springs, and the bottom of the B sieve body is fixedly connected to the vibration motor.

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