Self-cleaning slurry filter

Abstract

The invention discloses a self-cleaning slurry filter which comprises a filter body, a self-cleaning mechanism with a slurry dispersing assembly is arranged in the filter body in a penetrating mode, the self-cleaning mechanism comprises a scraper blade, a scraper blade frame, a rotating assembly and the slurry dispersing assembly, and the slurry dispersing assembly is formed by combining a dynamic row comb and a static row comb. Comprising a fixing shaft and a first row comb and a second row comb which can move in a staggered mode, the first row comb is arranged on the fixing shaft, the second row comb is arranged on the scraper frame, the scraper is arranged on the scraper frame and attached to the inner wall of an inner cavity of the filter body, and the rotating assembly is used for driving the scraper frame to rotate. Through the arrangement of the self-cleaning mechanism which penetrates through the filter body and is provided with the slurry dispersing assembly, and through the combination of the first row comb and the second row comb of the slurry dispersing assembly and the movable row comb and the static row comb which can move relatively in a staggered manner, slurry blocking a filter element can be effectively cleaned, slurry in front of a scraper blade can be scattered, condensation is avoided, and the efficiency is improved. The device has the characteristics of good self-cleaning effect and high slurry utilization rate.

Description

Technical Field

[0001] The invention belongs to the technical field of slurry filtering devices, and in particular relates to a self-cleaning slurry filter with a slurry dispersing component in a battery slurry preparation process. Background Art

[0002] Preparation of battery slurry is the first link in battery production and one of the most important links. Battery slurry is a high-viscosity fluid dispersed and mixed with different powders. It has the characteristics of difficult dispersion of particles, partial undispersed powder, easy agglomeration and sedimentation of slurry. The prepared slurry needs to be filtered by a filter before it can be transferred to the next process. Most of the existing slurry filters adopt a double-layer filter cartridge structure, with the upper layer being a mesh filter element, a slurry outlet on the outer wall, and a storage cavity and a slag outlet for the filtered material on the lower layer. During the filtration process, large particles or slurry agglomerates adhere to the filter element, which can easily block the pores of the filter element, causing the filter efficiency to decrease or fail, resulting in frequent line stops for manual cleaning and filter element replacement, which can easily cause waste of slurry, seriously restrict production efficiency, greatly increase production costs, and increase work intensity and operational risks due to the heavy weight of the filtration equipment.

[0003] In the prior art, some filters are provided with a rotating scraper that fits against the inner wall of the filter element to remove particles or agglomerates adhering to the pores of the filter element to achieve the purpose of self-cleaning. However, due to the high viscosity, poor fluidity and easy sedimentation of battery slurry, the slurry adhering to the filter element always stays in front of the scraper's rotation direction, and the agglomeration phenomenon is more obvious. It is very easy to condense into slurry with worse fluidity. On the one hand, it makes it more difficult for the scraper to move forward, and a powerful rotating motor is required to drive it. In addition, the condensed slurry may fill between the scraper and the inner wall of the filter element, making the two not fit tightly, weakening the self-cleaning effect; on the other hand, the condensed slurry moves downward into the lower layer of the filter cylinder, settles and agglomerates, and blocks the slag discharge port, causing the filter to still need to be frequently stopped for disassembly and cleaning, and the self-cleaning effect is still poor. In addition, due to the high viscosity and poor fluidity of the slurry, it is also easy to deposit on the connecting spring between the rotating scraper and the power rod (the scraper and the rotating rod are usually connected by a spring so that the scraper can fit the inner wall of the filter element), which increases the load of the rotating drive motor and affects the elastic deformation of the spring, further weakening the self-cleaning effect. Summary of the invention

[0004] The purpose of the present invention is to propose a self-cleaning slurry filter to solve the problem that the slurry filter is easy to be blocked, needs to be frequently disassembled and cleaned, has high operation intensity and high operation risk, or the existing self-cleaning filter cannot effectively achieve the self-cleaning effect due to the slurry being easy to agglomerate and coagulate.

[0005] The present invention is achieved through the following technical solutions: The present invention proposes a self-cleaning slurry filter, comprising a filter body, wherein the filter body is provided with a feed inlet at the top, a discharge port at the middle, and a slag discharge port at the bottom side, and the filter body comprises an upper and lower layer, wherein a filter element is provided in the upper layer, and the lower layer is a slag discharge cavity having the same diameter as the filter element; A self-cleaning mechanism with a slurry dispersion component is provided throughout the filter body, the slurry dispersion component is composed of a combination of a dynamic and a static row of combs, the slurry dispersion component comprises a fixed shaft, a first row of combs and a second row of combs, the lower end of the fixed shaft is fixed to the bottom of the filter body, the first row of combs is arranged on the fixed shaft, the first row of combs and the second row of combs are arranged alternately, and the end of the second row of combs is arranged close to the fixed shaft; The self-cleaning mechanism further includes a scraper, a scraper frame and a rotating assembly, wherein the scraper is arranged on the scraper frame and the scraper is arranged in contact with the filter element and the inner wall of the slag discharge cavity, and the rotating assembly is used to drive the scraper frame to rotate; The second row of combs is arranged on the scraper frame and can rotate with the scraper frame, the first row of combs has a distal end arranged close to the scraper frame, the upper end of the fixed shaft is rotatably connected to the scraper frame, the lower end passes through the scraper frame and is fixed to the bottom center of the slag discharge cavity, and the fixed shaft is coaxially arranged with the scraper frame and the filter body; When the rotating assembly drives the scraper frame to rotate, the scraper and the second row of combs rotate synchronously therewith, and while the scraper scrapes off the slurry on the inner wall of the filter element and the slag discharge cavity, the second row of combs passes through the gaps of the first row of combs and cuts the slurry accumulated in front of the scraper to break it.

[0006] Based on the above technical scheme, a self-cleaning mechanism with a slurry dispersion component is set up that runs through the filter body, and a dynamic and static comb combination composed of the first row of combs and the second row of combs of the slurry dispersion component can move relatively staggered, so as to scrape the slurry on the inner wall of the filter element and the slag discharge cavity during rotation, and at the same time, the slurry in front of the scraper is broken up by the relatively staggered moving rod body and mixed with the remaining slurry in the filter body again to form a stirring effect, so that the slurry always maintains good fluidity in the filter body, which can not only effectively clean up large particles or slurry agglomerates that block the filter element mesh, but also avoid slurry in front of the scraper and condensation, reduce the slag discharge amount, improve the slurry utilization rate, and avoid the slurry that enters the slag discharge cavity. The problem of condensation or sedimentation of the slurry that cannot be discharged, effectively reduces the frequency of filter element blockage and the frequency of manual cleaning of the filter.

[0007] Furthermore, the slag discharge cavity is set to be cylindrical, and the slag discharge cavity and the filter element have the same inner diameter. This design is conducive to simplifying the design of the self-cleaning structure and improving assembly efficiency.

[0008] Furthermore, the gap between the end of the second row of combs and the fixed axis, and the gap when the first row of combs and the second row of combs overlap are both greater than 5 times the filtration aperture of the filter element, and less than 1 / 4 times the radius of the filter element. This arrangement can avoid the first row of combs and the second row of combs being stuck by the slurry due to a gap that is too small, and the gap being too large resulting in the dispersed clumps being too large, which cannot effectively achieve the dispersion purpose.

[0009] Furthermore, an upper shaft hole and a lower shaft hole are provided in the middle of the upper and lower ends of the scraper frame, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, a prismatic groove is provided in the center of the bottom of the slag discharge cavity, the fixed shaft is a circular shaft, the top end of the fixed shaft is necked to form a cylindrical boss inserted into the upper shaft hole, the end of the fixed shaft is also necked to form an upper cylindrical and lower prismatic boss structure, the cylindrical part of the boss structure passes through the lower shaft hole, the prismatic part is located below the lower peripheral hole and embedded in the prismatic groove to be fixed. This design can enable the fixed shaft to maintain good stability during use and avoid rotation due to the viscosity of the slurry.

[0010] Furthermore, an upper shaft hole and a lower shaft hole are provided in the middle of the upper and lower ends of the scraper frame, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, a prismatic groove is provided in the center of the bottom of the slag discharge cavity, and the two ends of the fixed shaft are detachably connected with an upper joint and a lower joint, the upper joint includes an upper connecting part and a cylindrical embedded part inserted into the upper shaft hole, the lower joint includes a lower connecting part, a cylindrical lower embedded part passing through the lower shaft hole and a prismatic fixing part, the fixing part is embedded in the prismatic groove to be fixed, this design can make the fixed shaft maintain good stability during use, and at the same time make the fixed shaft detachable, thereby improving the convenience of maintenance and manual disassembly and cleaning.

[0011] Furthermore, a transverse reinforcement plate is provided in the middle of the scraper frame, a C-shaped guide hole is provided in the middle of the reinforcement plate, and the fixed shaft passes through the guide hole. This design helps to reduce the difficulty of assembly and better ensure the coaxiality of the fixed shaft and the scraper frame, as well as increase the structural strength of the fixed shaft to avoid deformation.

[0012] Furthermore, the second row of combs is provided with a conical surface in front of the rotation direction, and the cross-section of the second row of combs is fan-shaped or diamond-shaped. This design can better cut into the slurry through the conical surface when the first and second row of combs move relative to each other, which is more conducive to the dispersion of the slurry and reduces the rotation resistance of the scraper frame.

[0013] Furthermore, U-shaped limit grooves are provided on both sides of the scraper frame, and the inner side of the scraper is embedded in the U-shaped limit groove and fixed in the U-shaped limit groove by an elastic element. The elastic element is an arc-shaped spring sheet, or a spring, or an elastic buffer material. This design helps the scraper to always fit the filter element and the inner wall of the slag discharge cavity during rotation.

[0014] Furthermore, the scraper frame extends outward on one side in front of the rotation direction to form a conical guide surface, and the conical guide surface is used to quickly guide the slurry accumulated in front when the scraper rotates to the center of the filter body. This design is conducive to re-introducing the slurry in front of the scraper into the unfiltered slurry at a faster speed and breaking it up through the slurry dispersion component, thereby avoiding the slurry accumulation and settling on the edge of the scraper frame.

[0015] Furthermore, an elastic layer is provided at the outer end of the scraper located in the filter element, and the elastic layer has a comb-tooth-shaped end. When the scraper rotates, the comb-tooth-shaped end can extend into the filter holes of the filter element to further clean the residual slurry in the filter holes of the filter element.

[0016] Furthermore, a walking mechanism is provided under the filter body, and the filter body is detachably connected to the walking mechanism. Handles are provided on the outer wall of the filter cartridge and the cartridge cover. The purpose of this design is to reduce the difficulty of the operation and improve the convenience of operation when manual dismantling for cleaning or maintenance is required. Beneficial Effects

[0017] The inventive concept and beneficial effects of the present invention are: (1) A self-cleaning mechanism with a slurry dispersion component is provided which runs through the filter body. The first row of combs and the second row of combs of the slurry dispersion component form a dynamic and static comb combination. The first row of combs is fixed relative to the filter body, and the second row of combs rotates with the scraper frame of the self-cleaning mechanism, forming a staggered movement of the first row of combs and the second row of combs. While the scraper scrapes off the slurry adhering to the inner wall of the filter element and the slag discharge cavity, the slurry pushed to the front by the scraper is simultaneously broken up, so that it is dispersed again and mixed again with the remaining unfiltered slurry, so that the slurry always maintains good flow in the filter body. It can not only effectively clean up the large particles or slurry agglomerates that clog the filter element mesh, but also effectively avoid the coagulation of slurry, reduce the amount of slag discharge, reduce slurry waste, and avoid the problem of slurry entering the slag discharge cavity coagulating or settling and being unable to be discharged. Even during the rotation process, some slurry with sufficient dispersion and qualified viscosity in the slag discharge barrel can be refluxed into the filter cartridge for reuse under the action of centrifugal force. It has the characteristics of slurry not easy to settle, filter element not easy to be blocked, good self-cleaning effect and high slurry utilization rate, which effectively reduces the frequency of manual cleaning, improves production efficiency and greatly reduces production costs.

[0018] (2) By setting the overlapping gap between the first and second row combs and the gap between the ends, the rod body and other components to be greater than 5 times the filter hole of the filter element and less than 1 / 4 times the radius of the filter element, it can avoid the situation where the gap between the two is too small, resulting in large particles and non-dispersible agglomerates (such as coagulated slurry blocks) in the slurry being stuck in the gap, making it impossible for the first row comb and the second row comb to move relative to each other, affecting the normal operation of the filter; and it can also avoid the situation where the gap is too large, resulting in the agglomerates being too large after cutting, the slurry is still very easy to coagulate, and the shear crushing purpose cannot be effectively achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention; Figure 2 It is a front cross-sectional view of the first embodiment of the present invention; Figure 3 It is a schematic diagram of the side structure of the first embodiment of the present invention; Figure 4 This is a schematic diagram of the decomposed structure of the first embodiment of the present invention; Figure 5 It is a three-dimensional structural schematic diagram of the self-cleaning mechanism of the present invention; Figure 6 It is a front structural schematic diagram of the self-cleaning mechanism of the present invention; Figure 7 For the present invention Figure 6 The structural diagram of part A in the figure; Figure 8 It is a schematic structural diagram of a detachable fixed shaft of the present invention; Fig. 9 It is a structural schematic diagram of the scraper frame of the present invention; Fig.10 This is a schematic structural diagram of a cleaning mechanism according to a second embodiment of the present invention; In the figure: walking mechanism 1; filter body 2; feed cavity 201; discharge cavity 202; filter cartridge 21; slag discharge cavity 22; filter element 23; feed port 24; discharge port 25; slag discharge port 26; sealing ring 27; handle 28; cartridge cover 3; self-cleaning mechanism 4; scraper 41; scraper frame 42; upper shaft hole 421; lower shaft hole 422; U-shaped limit groove 423; reinforcing plate 424; guide hole 425; conical guide surface 426; slurry dispersion component 43; fixed shaft 43 a; first row comb 43b; second row comb 43c; tapered surface 43c1; upper joint 43d; upper connecting portion 43d1; upper embedded portion 43d2; lower joint 43e; lower connecting portion 43e1; lower embedded portion 43e2; fixed portion 43e3; rotating assembly 44; driving motor 44a; reducer 44b; mounting seat 44c; output shaft 44d; elastic coupling 44e; mechanical seal 44f; sliding bearing 44g; arc-shaped spring piece 45; comb tooth-shaped end 46. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto. Example

[0021] like Figure 1~Figure 4 As shown, this embodiment provides a self-cleaning slurry filter, which structure includes a walking mechanism 1 and a filter body 2, the filter body 2 is detachably connected to the walking mechanism 1, the filter body is provided with a feed inlet 24 at the top, a discharge port 25 in the middle, and a slag discharge port 26 at the bottom side, the filter body 2 includes an upper and lower layer, the upper layer is a filter cartridge 21, and the lower layer is a slag discharge cavity 22, a detachable filter element 23 is provided in the filter cartridge 21, and the slag discharge cavity 22 is of the same diameter as the filter element 23, a cartridge cover 3 is provided on the filter cartridge 21, the cartridge cover 3, the filter cartridge 21 and the slag discharge cavity 22 are detachably connected in sequence and sealing rings 27 are provided at the connection points, and handles 28 for facilitating disassembly operations are provided on the outer wall of the filter cartridge 21 and the cartridge cover 3.

[0022] like Figure 1As shown, the feed port 24 is arranged at the upper part of the filter cartridge 21, and the discharge port 25 is arranged at the lower part of the filter cartridge 21. A feed chamber 201 for storing unfiltered slurry is provided above the filter element 23, and the feed chamber 201 is communicated with the feed port 24. The inner cavity of the filter element 23 is communicated with the feed chamber 201 and the inner cavity of the slag discharge cavity 22. The inner diameter of the feed chamber 201 is larger than the inner cavity of the filter element 23. The discharge chamber 202 is between the outer wall of the filter element 23 and the inner wall of the filter cartridge 21, and the discharge chamber 202 is communicated with the discharge port 25. Preferably, the slag discharge cavity 22 is cylindrical, and the slag discharge cavity 22 has the same inner diameter as the filter element 23. A slag discharge port 26 is provided on the side wall of the lower end of the slag discharge cavity 22, and a prismatic groove is provided in the center of the bottom of the slag discharge cavity 22 (not shown in the drawings).

[0023] like Figure 4 , Figure 5 As shown, a self-cleaning mechanism 4 is provided through the filter body 2 , and the self-cleaning mechanism 4 includes a scraper 41 , a scraper frame 42 , a rotating component 44 and a slurry dispersing component 43 .

[0024] Among them, Figure 2 , Figure 5 , Figure 6 As shown, the slurry dispersion assembly 43 is composed of a combination of dynamic and static combs, including a fixed shaft 43a, a first comb row 43b and a second comb row 43b, and the lower end of the fixed shaft 43a is fixed to the bottom of the filter body 2 (see Figure 2), the first row of combs 43b is arranged on the fixed shaft 43a, the first row of combs 43b and the second row of combs 43c are arranged alternately, when actually arranged, the second row of combs 43c can be arranged centrally relative to the two adjacent first row of combs 43b, preferably, the second row of combs 43c is arranged close to the adjacent lower first row of combs 43b to form a larger flow rate on the upper surface of the first row of combs 43b, to prevent the slurry from depositing on the fixed first row of combs 43b, the end of the second row of combs 43c is arranged close to the fixed shaft 43a, the gap between the end of the second row of combs 43c and the fixed shaft 43a, the gap between the end of the first row of combs 43b and the scraper frame 42, the gap when the first row of combs 43b and the second row of combs 43c overlap, the gap between the first row of combs 43b and the second row of combs 43c and the filter body 2 is set to be greater than 5 times the filtering pores of the filter element 23 and less than 1 / 4 times the radius of the filter element, preferably, each type of gap is set to 1-10mm, more preferably, set to 2-5mm, To avoid the gap being too small, large particles and non-dispersible agglomerates in the slurry get stuck in the first row of combs 43b and the second row of combs 43c, so that the two cannot move relative to each other, and the gap being too large, resulting in the agglomerates being too large after being cut by the slurry dispersion component 43, and the purpose of shearing and crushing cannot be effectively achieved; the scraper 41 is arranged on the scraper frame 42 and the scraper 41 is arranged in contact with the inner wall of the filter element 23 and the slag discharge cavity 22, and the rotating component 44 is used to drive the scraper frame 42 to rotate; the The second row of combs 43c are arranged on the scraper frame 42 and can rotate with the scraper frame 42. The end of the first row of combs 43b is arranged close to the scraper frame 42. The upper end of the fixed shaft 43a is rotatably connected to the scraper frame 42, and the lower end passes through the scraper frame 42 and is fixed to the bottom center of the slag discharge cavity 22. The fixed shaft 43a is coaxially arranged with the scraper frame 42 and the filter body 2. The fixed shaft 43a provides the rotation center and support of the scraper frame 42 at the same time. The fixed shaft 43a can be a round shaft or a rectangular shaft, such as Figure 5 As shown, the fixed shaft 43a of this embodiment is a rectangular shaft.

[0025] More specifically, if Figure 6 As shown, the scraper frame 42 is provided with an upper shaft hole 421 and a lower shaft hole 422 in the middle of the upper and lower ends, and the scraper frame 42 is provided with a U-shaped limiting groove 423 on both sides. The inner side of the scraper 41 is embedded in the U-shaped limiting groove 423 and fixed in the U-shaped limiting groove 423 by an elastic element. The elastic element is an arc-shaped spring piece 45, or a spring, or an elastic buffer material, such as Figure 7As shown, the elastic element in this embodiment is an arc-shaped spring piece 45. The use of the arc-shaped spring piece 45 can better reduce the deposition of slurry on the elastic element and is more durable; the outer side of the scraper 41 is arranged to fit the inner wall of the filter element 23 and the slag discharge cavity 22. During the rotation of the scraper 41, it is affected by the inner wall of the filter element 23 and the slag discharge cavity 22 and the elastic element, and can move back and forth in the U-shaped limit groove 423, and always keep in close contact with the inner wall of the filter element 23 and the slag discharge cavity 22.

[0026] like Figure 1 and Figure 4 As shown, the rotating assembly 44 is arranged on the cylinder cover 3, including a driving motor 44a, a reducer 44b, a mounting seat 44c and an output shaft 44d, and an elastic coupling 44e and a mechanical seal 44f are arranged in the mounting seat 44c. The output shaft 44d passes through the mechanical seal 44f and the elastic coupling 44e and is connected to the reducer 44b. A sliding bearing 44g is arranged between the mechanical seal 44f and the output shaft 44d, and the mounting seat 44c is fixed on the cylinder cover 3. The end of the output shaft 44d passes through the cylinder cover 3 and enters the filter body 2 and is embedded in the upper shaft hole 421 fixed at the upper end of the scraper frame 42. When the rotating assembly 44 rotates, the scraper frame 42 can be driven to rotate accordingly.

[0027] like Figure 6 and Figure 8 As shown, the fixed shaft 43a is detachably connected with an upper joint 43d and a lower joint 43e, so as to improve the convenience of maintenance and manual disassembly and cleaning; Figure 8 As shown, the upper joint 43d includes an upper connecting portion 43d1 and a cylindrical upper embedded portion 43d2 inserted into the upper shaft hole 421, and the lower joint 43e includes a lower connecting portion 43e1, a cylindrical lower embedded portion 43e2 passing through the lower shaft hole 422, and a prismatic fixing portion 43e3, and the fixing portion 43e3 is embedded in the prismatic groove to be fixed, so that the fixed shaft 43a maintains good stability during use and avoids rotation or deflection due to the viscosity of the slurry; The upper connecting part 43d1 and the lower connecting part 43e1 are cylindrical and are both provided with a U-shaped groove for the fixed shaft 43a to be embedded in. The two ends of the fixed shaft 43a are connected to the upper connecting part 43d1 and the lower connecting part 43e1 by a pin shaft. The outer diameter of the upper connecting part 43d1 is larger than the upper shaft hole 421, and the outer diameter of the lower connecting part 43e1 is larger than the lower shaft hole 422, so as to limit the fixed shaft 43a at the center position of the scraper frame 42 and form a support for the scraper frame 42.

[0028] like Figure 5 As shown, the first row of combs 43b are cylindrical rods symmetrically arranged to increase the curvature of the upper surface of the first row of combs 43b and reduce the amount of slurry deposited on the first row of combs 43b, and the second row of combs 43c are also set as cylindrical rods; Preferably, Fig. 9 As shown, the structure of the second row of combs 43c is replaced by a special-shaped rod with a conical surface 43c1 in front of the rotation direction. The cross-section of the second row of combs 43c is fan-shaped or diamond-shaped, so that when the first and second row of combs 43c move relatively and staggered, the conical surface 43c1 can better cut into the slurry, which is beneficial to the dispersion of the slurry and the reduction of the rotation resistance of the scraper frame 42.

[0029] Preferably, when the fixed shaft 43a is a circular shaft, the top end of the fixed shaft 43a can be directly necked to form a cylindrical boss inserted into the upper shaft hole 421, and the end of the fixed shaft 43a can also be directly necked to form an upper cylindrical and lower prismatic boss structure, the cylindrical part of the boss structure passes through the lower shaft hole 422, and the prismatic part is located below the lower peripheral hole and embedded in the prismatic groove to form a fixation; Further, see Fig. 9 A transverse reinforcement plate 424 is provided in the middle of the scraper frame 42, and a C-shaped guide hole 425 is provided in the middle of the reinforcement plate 424. The fixed shaft 43a is arranged through the guide hole 425. The reinforcement plate 424 and the guide hole 425 can improve the accuracy of positioning the upper shaft hole 421 and the lower shaft hole 422 of the fixed shaft 43a, and at the same time increase the structural strength of the middle part of the fixed shaft 43a, which can effectively avoid the occurrence of deformation.

[0030] During actual use, the rotating component 44 drives the scraper frame 42 to rotate, and the scraper frame 42 drives the scraper 41 and the second row of combs 43c to rotate synchronously, wherein the scraper 41 closely fits the filter element 23 and the inner wall of the slag discharge cavity 22, and scrapes off the slurry adhering to the inner wall of the filter element 23 and the slag discharge cavity 22 and pushes it to the front in the rotation direction, and the accumulated slurry overflows into the scraper frame 42 and enters the interlaced area of ​​the first row of combs 43b and the second row of combs 43c. Driven by the scraper frame 42, the second row of combs 43c pass through the gaps of the first row of combs 43b to form a vortex, and cut, crush and stir the slurry during the continuous interlaced rotation of the first row of combs 43b and the second row of combs 43c. Thereby, the undispersed powder lumps, agglomerates, and semi-settled high-viscosity slurry in the slurry are dispersed again, and a mixed flow is formed to remix the scraped-off higher-viscosity slurry with the lower-viscosity slurry, so that the slurry always maintains good fluidity and weakens the slurry agglomeration and sedimentation phenomena. In addition, the slurry vortex formed in the slag discharge cavity 22 can, on the one hand, prompt the slurry with lower viscosity to flow upward and re-enter the filter cartridge 21 for reuse. On the other hand, the fluid slurry can be discharged more smoothly from the slag discharge port 26 under the push of the scraper 41, so that the slurry will not settle and condense in the slag discharge cavity 22 and cannot be discharged, nor will it block the slag discharge port 26, resulting in frequent manual cleaning. Example

[0031] This embodiment provides a self-cleaning slurry filter, which is different from the first embodiment in that: like Fig.10 As shown, based on the structure of the first embodiment, the scraper frame 42 is located in the front side of the rotation direction and extends outward to form a conical guide surface 426, and the conical guide surface 426 is used to quickly guide the slurry accumulated in the front when the scraper 41 rotates to the center of the filter body 2. Furthermore, an elastic layer (not shown in the drawings) is provided at the outer end of the scraper 41 located at the filter element 23, and the elastic layer has a comb-tooth-shaped end 46. When the scraper 41 rotates, the comb-tooth-shaped end 46 can extend into the filter holes of the filter element 23 to further clean the residual slurry in the filter holes of the filter element 23.

[0032] The advantage of this embodiment is that the slurry in front of the scraper 41 can be re-introduced into the unfiltered slurry at a faster speed through the conical guide surface 426 and dispersed through the slurry dispersion component 43, thereby preventing the slurry from accumulating and settling on the edge of the scraper frame 42 and reducing the cleaning effect.

[0033] Other components not described in this embodiment and the relative positions and connection relationships between the components are the same as those in the first embodiment.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A self-cleaning slurry filter, the structure of which includes a filter body, the filter body is provided with a feed inlet at the top, a discharge port in the middle, and a slag discharge port at the bottom side, the filter body includes an upper and lower layer, a filter element is provided in the upper layer, and the lower layer is a slag discharge cavity with the same diameter as the filter element; Features: A self-cleaning mechanism with a slurry dispersion component is provided throughout the filter body, the slurry dispersion component is composed of a combination of a dynamic and a static row of combs, the slurry dispersion component comprises a fixed shaft, a first row of combs and a second row of combs, the lower end of the fixed shaft is fixed to the bottom of the filter body, the first row of combs is arranged on the fixed shaft, the first row of combs and the second row of combs are arranged alternately, and the end of the second row of combs is arranged close to the fixed shaft; The self-cleaning mechanism further includes a scraper, a scraper frame and a rotating assembly, wherein the scraper is arranged on the scraper frame and the scraper is arranged in contact with the filter element and the inner wall of the slag discharge cavity, and the rotating assembly is used to drive the scraper frame to rotate; The second row of combs is arranged on the scraper frame and can rotate with the scraper frame, the first row of combs has a distal end arranged close to the scraper frame, the upper end of the fixed shaft is rotatably connected to the scraper frame, the lower end passes through the scraper frame and is fixed to the bottom center of the slag discharge cavity, and the fixed shaft is coaxially arranged with the scraper frame and the filter body; When the rotating assembly drives the scraper frame to rotate, the scraper and the second row of combs rotate synchronously therewith, and while the scraper scrapes off the slurry on the inner wall of the filter element and the slag discharge cavity, the second row of combs passes through the gaps of the first row of combs and cuts the slurry accumulated in front of the scraper to break it.

2. A self-cleaning slurry filter according to claim 1, characterized in that: The slag discharge cavity is set to be cylindrical, and the slag discharge cavity and the filter element have the same inner diameter.

3. A self-cleaning slurry filter according to claim 1, characterized in that: The gap between the end of the second row of combs and the fixed axis, and the gap when the first row of combs and the second row of combs overlap are both greater than 5 times the filter aperture of the filter element, and less than 1 / 4 times the radius of the filter element.

4. A self-cleaning slurry filter according to claim 1, characterized in that: An upper shaft hole and a lower shaft hole are provided in the middle of the upper and lower ends of the scraper frame, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, a prismatic groove is provided in the center of the bottom of the slag discharge cavity, the fixed shaft is a circular shaft, the top end of the fixed shaft is necked to form a cylindrical boss inserted into the upper shaft hole, the end of the fixed shaft is also necked to form an upper cylindrical and lower prismatic boss structure, the cylindrical part of the boss structure passes through the lower shaft hole, the prismatic part is located below the lower peripheral hole and is embedded in the prismatic groove to be fixed.

5. The self-cleaning slurry filter according to claim 1, characterized in that: An upper shaft hole and a lower shaft hole are provided in the middle of the upper and lower ends of the scraper frame, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, a prismatic groove is provided in the center of the bottom of the slag discharge cavity, and upper joints and lower joints are detachably connected at both ends of the fixed shaft, the upper joint includes an upper connecting part and a cylindrical embedded part inserted into the upper shaft hole, the lower joint includes a lower connecting part, a cylindrical lower embedded part passing through the lower shaft hole and a prismatic fixing part, and the fixing part is embedded in the prismatic groove to be fixed.

6. A self-cleaning slurry filter according to claim 1, characterized in that: The second row of combs is provided with a tapered surface in front in the rotation direction, and the cross section of the second row of combs is fan-shaped or rhombus-shaped.

7. A self-cleaning slurry filter according to claim 1, characterized in that: The scraper frame has U-shaped limit grooves on both sides. The inner side of the scraper is embedded in the U-shaped limit groove and fixed in the U-shaped limit groove through an elastic element. The elastic element is an arc-shaped spring, or a spring, or an elastic buffer material.

8. The self-cleaning slurry filter according to claim 1, characterized in that: The scraper frame has one side located in front of the rotation direction that extends outward to form a conical guide surface, and the conical guide surface is used to quickly guide the slurry accumulated in front when the scraper rotates to the center of the filter body.

9. The self-cleaning slurry filter according to claim 1, characterized in that: An elastic layer is arranged at the outer end of the scraper in the filter element. The elastic layer has a comb-tooth-shaped end. When the scraper rotates, the comb-tooth-shaped end can extend into the filter hole of the filter element.

10. The self-cleaning slurry filter according to claim 1, characterized in that: A walking mechanism is arranged below the filter body, and the filter body is detachably connected to the walking mechanism. Handles are arranged on the outer wall of the filter cartridge and the cartridge cover.

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