Self-cleaning slurry filter

Abstract

The utility model discloses a self-cleaning slurry filter which comprises a filter body, a self-cleaning mechanism with a slurry dispersing component is arranged in the filter body in a penetrating manner, the self-cleaning mechanism comprises a scraper blade, a scraper blade frame, a rotating component and the slurry dispersing component, and the slurry dispersing component 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. According to the utility model, the self-cleaning mechanism which penetrates through the filter body and is provided with the slurry dispersing component is arranged, and the first row comb and the second row comb of the slurry dispersing component form a movable and static row comb combination which can move relatively in a staggered manner, so that the slurry blocking the filter element can be effectively cleaned, and the slurry in front of the scraping plate can be scattered to avoid condensation; the device has the characteristics of good self-cleaning effect and high slurry utilization rate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to slurry filter device technical field, especially relate to a self-cleaning slurry filter with slurry dispersion subassembly in battery slurry preparation process. BACKGROUND

[0002] Battery slurry preparation is the first link in battery production and is one of the most important links. The battery slurry is a higher viscosity fluid prepared by dispersing and mixing different powders, and has the characteristics of difficult dispersion of particles, existence of part of un-dispersed powder, easy agglomeration of slurry, easy settlement, etc. The prepared slurry needs to be filtered by a filter before being transferred to the next process. Most of the existing slurry filters adopt a double-layer filter cartridge structure, the upper layer is a screen-like filter core, the outer side wall is provided with a slurry outlet, and the lower layer is a storage cavity of filtered material and a residue discharge port. During the filtering process, large particles or slurry agglomerates adhere to the filter core, which easily blocks the pores of the filter core, causing the filter efficiency to decrease or fail, resulting in the need to frequently stop the line for manual cleaning and filter core replacement, which not only easily causes waste of slurry, but also seriously restricts production efficiency, greatly increases production cost, and increases work intensity and operation risk due to the self-weight of the filtering equipment.

[0003] In the prior art, part of the filter is provided with a rotating scraper attached to the inner wall of the filter core to remove the particles or agglomerates adhered to the pores of the filter core to achieve self-cleaning. However, due to the characteristics of the battery slurry, such as high viscosity, poor flowability, and easy settlement, the slurry adhered to the filter core always stays in front of the rotating direction of the scraper, the agglomeration phenomenon is more obvious, and the slurry is easily condensed into slurry with poorer flowability. On the one hand, it increases the difficulty of the scraper to move forward, requires a powerful rotating motor to drive, and the condensed slurry may be filled between the scraper and the inner wall of the filter core, making them not tightly attached, and weakening the self-cleaning effect. On the other hand, the condensed slurry settles and blocks the residue discharge port after descending into the lower layer of the filter cartridge, causing the filter to still need to be frequently stopped for cleaning, and the self-cleaning effect is still poor. In addition, due to the high viscosity of the slurry, the flowability is poor, and the slurry is also easily deposited on the connecting spring between the rotating scraper and the power rod (the spring is usually used to connect the scraper and the rotating rod to make the scraper tightly attached to the inner wall of the filter core), which not only increases the load of the rotating drive motor, but also affects the elastic deformation of the spring, further weakening the self-cleaning effect. SUMMARY

[0004] The utility model aims at providing a self-cleaning slurry filter to solve the problems of easy blocking of the slurry filter, frequent cleaning, high work intensity, high operation risk, or the existing self-cleaning filter cannot effectively achieve the self-cleaning effect due to the easy agglomeration and condensation of the slurry.

[0005] The utility model realizes the following technical scheme:

[0006] The utility model provides a kind of self-cleaning slurry filter, including filter body, the upper portion of the filter body is equipped with feed inlet, middle part is equipped with discharge outlet, bottom side is equipped with slagging port, the filter body includes two layers of upper and lower, filter core is equipped in upper layer, lower layer is the slagging cavity with filter core equal diameter;

[0007] The self-cleaning mechanism with slurry dispersion assembly is arranged through the filter body, the slurry dispersion assembly is combined by dynamic and static comb, the slurry dispersion assembly includes fixed shaft, first comb and second comb, the lower end of the fixed shaft is fixed to the bottom of the filter body, the first comb is arranged on the fixed shaft, the first comb and the second comb are staggered, and the end of the second comb is arranged close to the fixed shaft.

[0008] The self-cleaning mechanism also includes a scraper, a scraper frame and a rotating assembly, the scraper is arranged on the scraper frame and is attached to the inner wall of the filter core and the slagging cavity, and the rotating assembly is used to drive the scraper frame to rotate.

[0009] The second comb is arranged on the scraper frame and can rotate with the scraper frame, the end of the first comb is arranged close to the scraper frame, the upper end of the fixed shaft is rotatably connected to the scraper frame, and the lower end penetrates through the scraper frame and is fixed to the center of the bottom of the slagging cavity, and the fixed shaft is coaxially arranged with the scraper frame and the filter body.

[0010] When the rotating assembly drives the scraper frame to rotate, the scraper and the second comb rotate synchronously, the scraper scrapes the slurry on the inner wall of the filter core and the slagging cavity, and the second comb passes through the gap between the first comb and cuts the slurry accumulated in front of the scraper to be broken.

[0011] Based on the above technical scheme, by arranging the self-cleaning mechanism with slurry dispersion assembly through the filter body, the first comb and the second comb of the slurry dispersion assembly form a dynamic and static comb combination that can relatively interleave, the slurry on the inner wall of the filter core and the slagging cavity is scraped during rotation, and the slurry in front of the scraper is dispersed by the relatively interleaved rod and mixed with the remaining slurry in the filter body again, forming a stirring effect, so that the slurry always maintains good fluidity in the filter body, effectively cleaning the large particles or slurry agglomerates that block the filter core mesh, avoiding the slurry from coagulating in front of the scraper, reducing the amount of slag, improving the utilization rate of slurry, and avoiding the problem that the slurry coagulates or settles in the slagging cavity, resulting in the inability to discharge, effectively reducing the frequency of filter core blockage and manual cleaning frequency of the filter.

[0012] Further, the slag discharging cavity is designed as a cylinder, and the slag discharging cavity has the same inner diameter as the filter core, which is beneficial to simplify the design of the self-cleaning structure and improve the assembly efficiency.

[0013] Further, the gap between the second row of combs and the fixed shaft and the gap between the first row of combs and the second row of combs when the first row of combs and the second row of combs are overlapped are both greater than 5 times the filter pore diameter of the filter core and less than 1 / 4 times the radius of the filter core, which can avoid the first row of combs and the second row of combs being stuck by the slurry due to the too small gap and the dispersed lumps being too large to effectively achieve the dispersion purpose due to the too large gap.

[0014] Further, the middle part of the upper end and the lower end of the scraper frame is provided with an upper shaft hole and a lower shaft hole, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, the bottom center of the slag discharging cavity is provided with a prismatic groove, 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 lower prismatic boss structure, the cylindrical part of the boss structure penetrates through the lower shaft hole, and the prismatic part is located below the lower shaft hole and is embedded in the prismatic groove to form a fixed structure, which can keep the fixed shaft stable during use and avoid rotation caused by the viscosity of the slurry.

[0015] Further, the middle part of the upper end and the lower end of the scraper frame is provided with an upper shaft hole and a lower shaft hole, the output end of the rotating assembly is embedded and fixed in the upper shaft hole, the bottom center of the slag discharging cavity is provided with a prismatic groove, the two ends of the fixed shaft are detachably connected with an upper joint and a lower joint, the upper joint comprises an upper connecting part and a cylindrical embedded part inserted into the upper shaft hole, the lower joint comprises a lower connecting part, a cylindrical lower embedded part penetrating through the lower shaft hole, and a prismatic fixing part, and the fixing part is embedded in the prismatic groove to form a fixed structure, which can keep the fixed shaft stable during use, and the fixed shaft can be detached to improve the convenience of maintenance and manual cleaning.

[0016] Further, the middle part of the scraper frame is provided with a transverse reinforcing plate, the middle part of the reinforcing plate is provided with a C-shaped guide hole, and the fixed shaft penetrates through the guide hole, which is beneficial to reduce the assembly difficulty, better ensure the coaxiality of the fixed shaft and the scraper frame, increase the structural strength of the fixed shaft, and avoid deformation.

[0017] Further, the second row of combs is provided with a tapered surface in front of the rotating direction, and the cross section of the second row of combs is fan-shaped or rhombic, which can better cut into the slurry through the tapered surface when the first row of combs and the second row of combs relatively interleave, which is more conducive to the dispersion of the slurry and reduces the rotating resistance of the scraper frame.

[0018] Further, the U-shaped limiting groove is arranged on the left and right sides of the scraper frame, the scraper is embedded in the U-shaped limiting groove and fixed in the U-shaped limiting groove through the elastic element, and the elastic element is an arc-shaped elastic sheet, a spring or an elastic buffer material, so that the scraper is always attached to the filter element and the inner wall of the residue discharging cavity during rotation.

[0019] Further, the scraper frame is outwardly extended to form a conical flow guide surface on the side in front of the rotation direction, and the conical flow guide surface is used for quickly guiding the slurry accumulated in front of the scraper to the central position of the filter body during rotation of the scraper, so that the slurry in front of the scraper is quickly reintroduced into the unfiltered slurry at a faster speed and is dispersed by the slurry dispersion assembly, thereby avoiding the slurry from being accumulated and settled on the edge of the scraper frame.

[0020] Further, the outer end of the scraper in the filter element is provided with an elastic layer, and the elastic layer has a toothed end, so that the toothed end can be inserted into the filter hole of the filter element during rotation of the scraper, so as to further clean the residual slurry in the filter hole of the filter element.

[0021] Further, the walking mechanism is arranged below the filter body, the filter body is detachably connected to the walking mechanism, and handles are arranged on the outer wall of the filter cartridge and the cartridge cover, so that when manual removal, cleaning or maintenance is required, the operation difficulty is reduced and the operation convenience is improved. Advantages

[0022] The application concept and advantages of the utility model lie in that:

[0023] (1) the self-cleaning mechanism with the slurry dispersion assembly is arranged through the filter body, the first row of combs and the second row of combs of the slurry dispersion assembly are combined to form a dynamic and static comb combination, the first row of combs is fixed relative to the filter body, the second row of combs rotates with the scraper frame of the self-cleaning mechanism, the first row of combs and the second row of combs are interlaced with each other, the slurry adhered to the inner wall of the filter element and the residue discharging cavity is scraped by the scraper at the same time, the slurry pushed to the front by the scraper is dispersed synchronously, the slurry is dispersed again and mixed with the remaining unfiltered slurry, the flowability of the slurry in the filter body is maintained, the large particles or slurry agglomerates that block the filter element mesh are effectively cleaned, the coagulation of the slurry is effectively avoided, the residue discharge amount is reduced, the slurry waste is reduced, the problem that the slurry coagulates or settles in the residue discharging cavity and cannot be discharged is avoided, even in the rotating process, part of the slurry in the residue discharge barrel that is fully dispersed and has qualified viscosity can flow back into the filter cartridge again under the action of the centrifugal force, the slurry is not easy to settle, the filter element is not easy to block, the self-cleaning effect is good, the slurry utilization rate is high, the manual cleaning frequency is effectively reduced, the production efficiency is improved, and the production cost is greatly reduced.

[0024] (2) by the first, second row of comb coincident gap and end, rod and other components between the gap is greater than 5 times the filter core filter pore, and less than 1 / 4 times the filter core radius, both can avoid the gap too small resulting in large particles in the slurry, the undispersible agglomerates (such as the slurry block has been condensed) stuck in the gap, the first row of comb and the second row of comb can't move relative to each other, affect the normal work of the filter, also can avoid the gap too large resulting in cutting after the agglomerates are still too large, slurry is still easy to condense, can't effectively realize the purpose of shear crushing. BRIEF DESCRIPTION OF DRAWINGS

[0025] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, read in conjunction with the accompanying drawings:

[0026] Figure 1 is the three-dimensional structure schematic view of the embodiment one of the utility model;

[0027] Figure 2 is the front view of the embodiment one of the utility model;

[0028] Figure 3 is the side structure schematic view of the embodiment one of the utility model;

[0029] Figure 4 is the exploded structure schematic view of the embodiment one of the utility model;

[0030] Figure 5 is the three-dimensional structure schematic view of the self-cleaning mechanism of the utility model;

[0031] Figure 6 is the front structure schematic view of the self-cleaning mechanism of the utility model;

[0032] Figure 7 is the structure schematic view of the utility model Figure 6 A part of the utility model;

[0033] Figure 8 is the structure schematic view of the detachable fixing shaft of the utility model;

[0034] Figure 9 is the structure schematic view of the scraper frame of the utility model;

[0035] Figure 10 is the structure schematic view of the cleaning mechanism of the embodiment two of the utility model;

[0036] In the figure: walking mechanism 1; filter body 2; feeding cavity 201; discharging cavity 202; filter cartridge 21; residue discharging cavity 22; filter core 23; feeding port 24; discharging port 25; residue discharging 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 limiting groove 423; reinforcing plate 424; guide hole 425; conical flow guide surface 426; slurry dispersing assembly 43; fixed shaft 43a; first row of combs 43b; second row of combs 43c; conical surface 43c1; upper joint 43d; upper connecting part 43d1; upper embedding part 43d2; lower joint 43e; lower connecting part 43e1; lower embedding part 43e2; fixed part 43e3; rotating assembly 44; driving motor 44a; speed reducer 44b; mounting seat 44c; output shaft 44d; elastic coupling 44e; mechanical seal 44f; sliding bearing 44g; arc-shaped elastic sheet 45; comb-shaped end 46. DETAILED DESCRIPTION

[0037] The utility model will be further explained in detail in connection with the embodiments below, but the implementation mode of the utility model is not limited to this. EMBODIMENT

[0038] As Figures 1-4 shown, the embodiment provides a self-cleaning slurry filter, which comprises 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 feeding port 24 at the upper part, a discharging port 25 at the middle part, and a residue discharging port 26 at the bottom side, the filter body 2 comprises two layers, the upper layer is a filter cartridge 21, and the lower layer is a residue discharging cavity 22, the filter cartridge 21 is provided with a detachable filter core 23, the residue discharging cavity 22 is equal in diameter to the filter core 23, the filter cartridge 21 is provided with a cartridge cover 3, the cartridge cover 3, the filter cartridge 21 and the residue discharging cavity 22 are detachably connected in sequence, and sealing rings 27 are arranged at the connecting positions, handles 28 are arranged on the outer wall of the filter cartridge 21 and the cartridge cover 3 for facilitating disassembly operation.

[0039] As Figure 1As shown, the feed port 24 is arranged on the upper portion of the filter cartridge 21, the discharge port 25 is arranged on the lower portion of the filter cartridge 21, the filter core 23 is provided with a feed cavity 201 for storing unfiltered slurry above the filter core 23, the feed cavity 201 is communicated with the feed port 24, the inner cavity of the filter core 23 is communicated with the feed cavity 201 and the inner cavity of the residue discharge cavity 22, the inner diameter of the feed cavity 201 is greater than the inner cavity of the filter core 23, the discharge cavity 202 is formed between the outer wall of the filter core 23 and the inner wall of the filter cartridge 21, the discharge cavity 202 is communicated with the discharge port 25; preferably, the residue discharge cavity 22 is cylindrical, the residue discharge cavity 22 has the same inner diameter as the filter core 23, the residue discharge port 26 is arranged on the side wall of the lower end of the residue discharge cavity 22, and the prismatic recess (not shown in the drawing) is arranged at the center of the bottom of the residue discharge cavity 22.

[0040] As shown in Figure 4 、 Figure 5 , the self-cleaning mechanism 4 is arranged in the filter body 2, the self-cleaning mechanism 4 includes a scraper 41, a scraper frame 42, a rotating assembly 44 and a slurry dispersion assembly 43.

[0041] As shown in Figure 2 、 Figure 5 , Figure 6 , the slurry dispersion assembly 43 is combined by a dynamic and static comb, including a fixed shaft 43a, a first comb 43b and a second comb 43b, 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 are arranged on the fixed shaft 43a, the first row of combs 43b and the second row of combs 43c are staggered, in actual arrangement, the second row of combs 43c can be arranged in the middle 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, avoiding the pulp 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 coincide, and the gap between the first row of combs 43b and the second row of combs 43c and the filter body 2 are all arranged to be greater than 5 times the filter hole of the filter core 23 and less than 1 / 4 times the radius of the filter core, preferably, the various gaps are arranged to be 1-10mm, more preferably, arranged to be 2-5mm, to avoid that the large particles and the non-dispersible agglomerates in the pulp are stuck in the first row of combs 43b and the second row of combs 43c, so that the relative movement of the two cannot occur, and that the gap is too large, resulting in that the agglomerates cut by the pulp dispersing assembly 43 are still too large to effectively achieve the purpose of shear breaking; the scraper 41 is arranged on the scraper frame 42 and adheres to the inner wall of the filter core 23 and the residue discharging cavity 22, the rotating assembly 44 is used to drive the rotation of the scraper frame 42; the second row of combs 43c is 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, the lower end penetrates through the scraper frame 42 and is fixed to the center of the bottom of the residue discharging cavity 22, the fixed shaft 43a is coaxially arranged with the scraper frame 42 and the filter body 2, and the fixed shaft 43a simultaneously provides the rotation center and support of the scraper frame 42. The fixed shaft 43a can be a circular shaft or a rectangular shaft, as shown in Figure 5 , the fixed shaft 43a of the embodiment is selected to be a rectangular shaft.

[0042] More specifically, as shown in Figure 6 , the middle part of the upper and lower ends of the scraper frame 42 is provided with an upper shaft hole 421 and a lower shaft hole 422, the left and right sides of the scraper frame 42 are provided with a U-shaped limiting groove 423, 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 through elastic elements, the elastic elements are arc-shaped elastic pieces 45, springs or elastic buffer materials, as shown in Figure 7The elastic element in the embodiment is an arc-shaped elastic piece 45. The use of the arc-shaped elastic piece 45 can better reduce the deposition of the slurry on the elastic element and is more durable. The outer side of the scraper 41 is attached to the inner wall of the filter core 23 and the residue discharging cavity 22. During the rotation of the scraper 41, the scraper 41 is moved before and after the U-shaped limiting groove 423 under the action of the inner wall of the filter core 23 and the residue discharging cavity 22 and the elastic element, and always maintains the state of being close to the inner wall of the filter core 23 and the residue discharging cavity 22.

[0043] As shown in Figure 1 and Figure 4 The rotating assembly 44 is arranged on the barrel cover 3 and includes a driving motor 44a, a speed reducer 44b, a mounting seat 44c, and an output shaft 44d. The mounting seat 44c is internally provided with an elastic coupling 44e and a mechanical seal 44f. The output shaft 44d penetrates the mechanical seal 44f and the elastic coupling 44e and is connected with the speed reducer 44b. A sliding bearing 44g is arranged between the mechanical seal 44f and the output shaft 44d. The mounting seat 44c is fixed to the barrel cover 3. The output shaft 44d penetrates the barrel cover 3 and enters the filter body 2 and is embedded in an upper shaft hole 421 at the upper end of the scraper frame 42. When the rotating assembly 44 rotates, the scraper frame 42 can be driven to rotate.

[0044] As shown in Figure 6 and Figure 8 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 washing. As shown in Figure 8 The upper joint 43d includes an upper connecting part 43d1 and a cylindrical upper embedding part 43d2 which is inserted into the upper shaft hole 421. The lower joint 43e includes a lower connecting part 43e1, a cylindrical lower embedding part 43e2 which penetrates the lower shaft hole 422, and a prismatic fixing part 43e3. The fixing part 43e3 is embedded in the prismatic groove to form a fixing, so that the fixed shaft 43a can maintain good stability during use and avoid rotation or deflection caused by the viscosity of the slurry. The upper connecting part 43d1 and the lower connecting part 43e1 are cylindrical and internally provided with a U-shaped groove for embedding the fixed shaft 43a. The two ends of the fixed shaft 43a are connected with the upper connecting part 43d1 and the lower connecting part 43e1 by a pin shaft mode. The outer diameter of the upper connecting part 43d1 is greater than the upper shaft hole 421. The outer diameter of the lower connecting part 43e1 is greater than the lower shaft hole 422, so as to limit the fixed shaft 43a at the central position of the scraper frame 42 and form a support for the scraper frame 42.

[0045] As shown in Figure 5 The first row of combs 43b are symmetrically arranged cylindrical rods to increase the curvature of the upper surface of the first row of combs 43b and reduce the deposition amount of the slurry on the first row of combs 43b. The second row of combs 43c are also cylindrical rods.

[0046] Preferably, as shown in Figure 9 , the structure of the second row of combs 43c is replaced by a special-shaped rod with a tapered surface 43c1 in front of the rotating direction, and the cross section of the second row of combs 43c is fan-shaped or rhombic, so that the tapered surface 43c1 can better cut into the pulp when the first and second rows of combs 43c are relatively staggered, which is beneficial to the dispersion of the pulp and the reduction of the rotating resistance of the scraper frame 42.

[0047] Preferably, when the fixed shaft 43a is selected as 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 bottom end of the fixed shaft 43a can also be directly necked to form an upper cylindrical and lower prism-shaped boss structure, the cylindrical part of the boss structure penetrates through the lower shaft hole 422, and the prism-shaped part is located below the lower circumferential hole and embedded in the prism-shaped groove to form a fixation;

[0048] Further, referring to Figure 9 , the middle part of the scraper frame 42 is provided with a transverse reinforcing plate 424, and the middle part of the reinforcing plate 424 is provided with a C-shaped guide hole 425, and the fixed shaft 43a penetrates through the guide hole 425, so that the reinforcing plate 424 and the guide hole 425 can improve the positioning accuracy of the fixed shaft 43a to the upper shaft hole 421 and the lower shaft hole 422, and increase the structural strength of the middle part of the fixed shaft 43a, so that the deformation can be effectively avoided.

[0049] In actual use, the rotating assembly 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 adheres to the filter core 23 and the inner wall of the residue discharging cavity 22 and scrapes off and pushes the pulp adhered to the inner wall of the filter core 23 and the residue discharging cavity 22 to the front of the rotating direction, the accumulated pulp overflows into the interlaced area of the first row of combs 43b and the second row of combs 43c, and the second row of combs 43c passes through the gap between the first row of combs 43b under the driving of the scraper frame 42 to form a rotational flow, which cuts, breaks and stirs the pulp in the continuous interlaced rotation process of the first row of combs 43b and the second row of combs 43c, so as to disperse the undispersed powder, agglomerate and semi-set high-viscosity pulp in the pulp again, form a mixed flow to re-mix the higher-viscosity pulp scraped off with the lower-viscosity pulp, and keep the pulp always in good fluidity, while weakening the agglomeration and sedimentation of the pulp; in addition, the rotational flow of the pulp formed in the residue discharging cavity 22 can promote the smaller-viscosity pulp to flow back into the filter cartridge 21 to be used again, and the fluidity of the pulp can be more smoothly discharged from the residue discharge port 26 under the pushing of the scraper 41, so as not to be settled and condensed in the residue discharging cavity 22 and not to block the residue discharge port 26, which needs to be cleaned frequently by hand. Example

[0050] This embodiment provides a self-cleaning slurry filter, which differs from the first embodiment in that:

[0051] like Figure 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. The conical guide surface 426 is used to quickly guide the slurry accumulated in front when the scraper 41 rotates to the center of the filter body 2.

[0052] 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 hole of the filter element 23 to further clean the residual slurry in the filter hole of the filter element 23.

[0053] 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, avoiding the slurry from accumulating and settling on the edge of the scraper frame 42, thereby reducing the cleaning effect.

[0054] 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.

[0055] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of protection of the present invention.

Claims

1. A self-cleaning slurry filter, comprising a filter body, wherein an inlet is arranged on the upper part of the filter body, an outlet is arranged on the middle part of the filter body, and a slag discharge port is arranged on the bottom side of the filter body; the filter body comprises two layers, an upper layer is provided with a filter core, and a lower layer is a slag discharge cavity with the same diameter as the filter core; a self-cleaning mechanism with a slurry dispersion assembly is arranged in the filter body; the slurry dispersion assembly is composed of a dynamic and static comb combination; the slurry dispersion assembly comprises a fixed shaft, a first comb and a second comb; the lower end of the fixed shaft is fixed to the bottom of the filter body; the first comb is arranged on the fixed shaft; the first comb and the second comb are arranged alternately; and the end of the second comb is arranged close to the fixed shaft. characterized in that The self-cleaning mechanism further comprises a scraper, a scraper frame and a rotating assembly; the scraper is arranged on the scraper frame and is attached to the inner wall of the filter core and the slag discharge cavity; and the rotating assembly is used to drive the rotation of the scraper frame. The second comb is arranged on the scraper frame and can rotate with the scraper frame; the end of the first comb is arranged close to the scraper frame; the upper end of the fixed shaft is rotatably connected to the scraper frame; the lower end of the fixed shaft penetrates through the scraper frame and is fixed to the center of the bottom 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 rotation of the scraper frame, the scraper and the second comb rotate synchronously; while the scraper scrapes the slurry on the inner wall of the filter core and the slag discharge cavity, the second comb passes through the gap between the first comb and cuts the slurry accumulated in front of the scraper to make it broken. The slag discharge cavity is cylindrical; and the slag discharge cavity has the same inner diameter as the filter core.

2. A self-cleaning slurry filter according to claim 1, characterized in that: The gap between the end of the second comb and the fixed shaft and the gap when the first comb and the second comb coincide are both greater than 5 times the filter pore diameter of the filter core and less than 1 / 4 times the radius of the filter core.

3. A self-cleaning slurry filter according to claim 1, characterized in that: The middle part of the upper and lower ends of the scraper frame is provided with an upper shaft hole and a lower shaft hole; the output end of the rotating assembly is embedded and fixed in the upper shaft hole; the center of the bottom of the slag discharge cavity is provided with a prismatic groove; 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 a boss structure with an upper cylindrical and lower prismatic shape; the cylindrical part of the boss structure penetrates through the lower shaft hole; and the prismatic part is located below the lower shaft hole and is embedded in the prismatic groove to form a fixed connection.

4. A self-cleaning slurry filter according to claim 1, characterized in that: The middle part of the upper and lower ends of the scraper frame is provided with an upper shaft hole and a lower shaft hole; the output end of the rotating assembly is embedded and fixed in the upper shaft hole; the center of the bottom of the slag discharge cavity is provided with a prismatic groove; the upper and lower joints are detachably connected to the two ends of the fixed shaft; the upper joint comprises an upper connecting part and a cylindrical embedded part inserted into the upper shaft hole; the lower joint comprises a lower connecting part, a cylindrical lower embedded part penetrating through the lower shaft hole and a prismatic fixed part; and the fixed part is embedded in the prismatic groove to form a fixed connection.

5. A self-cleaning slurry filter according to claim 1, wherein: The second comb is provided with a conical surface in front of the rotation direction; and the cross section of the second comb is fan-shaped or rhombic.

6. A self-cleaning slurry filter according to claim 1, characterized in that: ​ 7. A self-cleaning slurry filter according to claim 1, wherein: The U-shaped limiting groove is embedded in the U-shaped limiting groove and is fixed in the U-shaped limiting groove through the elastic element.

8. A self-cleaning slurry filter according to claim 1, characterized in that: The conical flow guide surface is used for guiding the slurry accumulated in front of the scraper to the center of the filter body when the scraper rotates.

9. A self-cleaning slurry filter according to claim 1, wherein: The elastic layer has a tooth comb-shaped end, and the tooth comb-shaped end can extend into the filter hole of the filter core when the scraper rotates.

10. The self-cleaning slurry filter of claim 1, wherein: The filter body is detachably connected to the traveling mechanism, and handles are arranged on the outer wall of the filter cartridge and the cartridge cover.

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