A white mud filtration device

Abstract

The present invention relates to the technical field of filtering devices, specifically a white mud filtering device, which is composed of an overall support, a tank body, a filter disc, a scraping device, a main shaft, a transmission device, a flow dividing device and a vacuum device. The filter disc is composed of a number of sector plates and filter cloth. The sector plate includes a first sieve cover plate, a second sieve cover plate and a connecting head. The first sieve cover plate and the second sieve cover plate are assembled by setting snap connections and welded to the connecting head; the sector plate is connected to the main shaft through the connecting head; the filter disc also includes a number of outer supports and inner supports. An outer support is provided at the outer end of each sector plate. The front and rear ends of the outer support are respectively set as parallel inclined plane ends, and adjacent outer supports are locked after a first bolt passes through the two inclined plane ends; the inner support is arranged between two adjacent sector plates and is clamped on the left and right sides of the sector plate and locked by a second bolt. Compared with the prior art, the filter disc of the present invention has higher structural strength and can effectively reduce the yaw of the filter disc during operation.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and specifically to a white mud filtering device. Background Art

[0002] The filter disc of a white mud filter rotates in a tank filled with white slurry. Through the suction of a vacuum pump, a vacuum is formed inside the filter disc. Due to atmospheric pressure, white mud exerts pressure on the filter disc. When the filter disc rotates into the white mud, the liquid in the white mud enters the filter disc, and the solid particles are retained on the surface of the filter disc to form a filter cake; when the filter disc rotates out of the white mud, the filter cake on the filter disc is then peeled off by a scraping device. The filter disc continues to rotate into the white mud to achieve solid-liquid separation in sequence. The filter cake on the filter disc of a vertical disc filter enters the blanking chute after being peeled off by the scraping device. The scraping device is close to the filter disc. When the filter disc rotates to the scraping device, the filter cake is peeled off and enters the blanking chute.

[0003] Currently, the mainstream filter discs are composed of sector plates and are fixed and locked by installing outer ring fasteners and bolt tie rods. However, due to the large diameter of the rotating filter disc, as well as manufacturing precision, the stiffness and strength of the filter disc, and flatness, etc., the filter disc will have a certain yaw during rotation. And with the long-term operation of the equipment, the yaw degree of the filter disc will become more and more serious, and even permanent deformation will occur. In addition, since the scraping device of the existing filter is fixed, if the filter disc yaws during operation, it will also cause friction or scraping between the filter cloth layer of the filter disc and the scraping device, resulting in equipment damage and shutdown, thereby affecting production. Moreover, the mainstream sector plates mostly use welding technology to realize the assembly welding of components, which is very easy to cause welding deformation and the short-term inability to release the welding stress, resulting in phenomena such as deformation and weld cracking, making it difficult to ensure the overall strength of the filter disc and making it more prone to problems such as yaw. Therefore, it is necessary to design a white mud filtering device with a strengthened filter disc structure that can effectively reduce the yaw amplitude and prevent the scraping device from damaging the filter disc to reduce equipment loss and the problem of shutdown. Summary of the Invention

[0004] In view of the above deficiencies of the prior art, the present invention designs a white mud filtering device with a strengthened filter disc structure that can effectively reduce the yaw amplitude and prevent the scraping device from damaging the filter disc to solve the problem.

[0005] A white mud filtering device of the present invention is composed of an overall bracket, a tank body, filter discs, a scraping device, a main shaft, a transmission device, a shunt device and a vacuum device. The filter discs are composed of a number of sector plates and filter cloths. The sector plates are composed of a first sieve cover plate, a second sieve cover plate and a connecting head. The first sieve cover plate and the second sieve cover plate are assembled by setting snap connections, and a connecting head matched with the main shaft is welded at the inner end after assembly. The connecting head is tubular, and connecting steps parallel to the sector plates are respectively arranged on both sides. The main shaft is provided with an annular clamping groove matched with the connecting steps, and a stepped through groove in the left-right direction and larger than the connecting steps. The filter discs further include a number of outer brackets and inner brackets, and the outer brackets and inner brackets are sector-shaped. An outer bracket is arranged at the outer end of each sector plate. The front and rear ends of the outer bracket are respectively arranged as parallel inclined plane ends, and adjacent outer brackets are locked after a first bolt passes through the two inclined plane ends horizontally. The front and rear sides of the inner bracket are respectively provided with limit clamping grooves matched with the inner ends of the sector plates. The inner bracket is arranged between two adjacent sector plates, and is clamped on the left and right sides of the sector plates and locked by a second bolt.

[0006] Further, the tank body includes blanking grooves corresponding to the filter discs one by one, and a scraping device matched with the filter discs is arranged in each blanking groove. The scraping device includes a scraper, an adapting base, a rotating tool handle, an elastic component and a guide wheel. Left and right sliding rails are respectively arranged on the front and rear sides of the blanking groove. The adapting base is slidably arranged in the left and right sliding rails. The adapting base is hinged with a horizontally rotating rotating tool handle. The two ends of the scraper are fixed between two relatively front and rear rotating tool handles. A guide wheel matched with the outer bracket or the inner bracket is arranged at the top of the adapting base. An elastic component for making the adapting base close to the outer bracket or the inner bracket is arranged in the left and right sliding rails. The left and right sides of the outer bracket and the outer sides of the inner bracket are arranged as arc-shaped convex surfaces.

[0007] Further, the scraper is provided with a rotating shaft penetrating through the front and rear ends. The scraper is rotatably connected with the front and rear rotating tool handles through the rotating shaft, and a locking mechanism is arranged.

[0008] Further, the blade of the scraper is an arc-shaped downward.

[0009] Further, a number of reinforcing ribs are respectively arranged at equal intervals on the inner sides of the first sieve cover plate and the second sieve cover plate. The reinforcing ribs are "T"-shaped. The first sieve cover plate and the second sieve cover plate are respectively provided with a number of reinforcing plates. The reinforcing plates are provided with a number of snap connections. The reinforcing ribs are provided with a number of clamping grooves matched with the snap connections.

[0010] Further, a pin hole and a telescopic bolt are respectively arranged at two inclined ends of the outer bracket; a rack is arranged at the bottom of the telescopic bolt, a gear meshing with the rack is arranged in the outer bracket, a regular polygon limiting through hole is arranged at the axis center of the gear, a limiting block matched with the limiting through hole is arranged on the first bolt, and the diameter of the threaded end of the first bolt is smaller than the width of the limiting block.

[0011] Further, a connecting groove matched with the sector plate is arranged on the inner side of the outer bracket, an insert block is arranged in the connecting groove, and an inserting groove matched with the insert block is arranged on the sector plate.

[0012] Further, the white mud filtering device further comprises a conveying device, a conveying groove located at the bottom of the blanking groove is arranged on the tank body, and the conveying device is arranged in the conveying groove.

[0013] The beneficial effects of the present invention are as follows: compared with the prior art, the filter disc structure of the white mud filtering device has higher strength, and can effectively reduce the yaw problem of the filter disc during operation. Moreover, the scraping device is provided with an adaptive structure, so that it can be adjusted according to the yaw amplitude of the filter disc, avoiding the problem of scraping and damage between the filter cloth layer of the filter disc and the scraper. Generally speaking, the white mud filtering device has higher reliability and lower failure rate, and better meets the production requirements of paper-making enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall structural schematic diagram of the present invention;

[0015] Figure 2 is the partial top view sectional view of the present invention;

[0016] Figure 3 is the partial front view sectional view of the present invention;

[0017] Figure 4 is Figure 1 the enlarged view of the partial detail A in

[0018] Figure 5 is Figure 2 the enlarged view of the partial detail B in

[0019] Figure 6 is Figure 3 the enlarged view of the partial detail C in

[0020] Figure 7 is the connection schematic diagram of the filter disc and the main shaft;

[0021] Figure 8 is Figure 7 the enlarged view of the partial detail D in

[0022] Figure 9 is the structural schematic diagram of the sector plate;

[0023] Figure 10 It is the right view of the sector plate;

[0024] Figure 11 It is a schematic diagram of the connection mode of the outer bracket;

[0025] Figure 12 It is the right-view sectional view after the connection of the outer bracket;

[0026] Figure 13 It is a schematic diagram of the connection mode of the inner bracket.

[0027] In the figure: overall bracket 1, trough body 2, blanking trough 201, left and right slide rails 2011, conveying trough 202, filter disc 3, sector plate 301, first sieve cover plate 3011, second sieve cover plate 3012, connection head 3013, connection step 3014, reinforcing rib 3015, reinforcing plate 3016, buckle 3017, card slot 3018, inlay groove 3019, outer bracket 302, inclined end 3021, pin hole 3022, telescopic plug pin 3023, gear 3024, limit through hole 3025, connection groove 3026, inlay block 3027, inner bracket 303, limit card slot 3031, first bolt 304, limit block 3041, second bolt 305, nut 306, filter cloth 309, scraping device 4, scraper 401, rotating shaft 4011, adaptor base 402, limit slider 4021, rotating handle 403, elastic component 404, guide wheel 405, locking nut 406, connecting pipe 407, main shaft 5, connection socket 501, annular card slot 502, step through slot 503, transmission device 6, shunt device 7, conveying device 8, spiral conveying rod 81. Specific embodiments

[0028] In order to better understand the present invention, the following will combine Figures 1 to 13 to explain in detail the embodiments of the present invention.

[0029] It should be noted that the "front, back, left, right, up, and down" directions described in the text are all based on the Figure 1 "front, back, left, right, up, and down" directions in it.

[0030] A white mud filtering device of the present invention, as shown in Figure 1 and Figure 2As shown, similar to the mainstream filter, the white mud filtering device mainly consists of an integral bracket 1, a tank body 2, filter discs 3, a scraping device 4, a main shaft 5, a transmission device 6, a shunt device 7, and a vacuum device. The filter discs 3 are composed of a rotating array of a number of sector plates 301 with filter cloths 309 sleeved on them. Since the main shaft 5, the transmission device 6, the shunt device 7, and the vacuum device are all mature existing technologies and there are various implementation manners, which can be understood by those skilled in the art, their structures and principles will not be introduced in detail. Among them, the vacuum device (vacuum pump and pipeline components, etc.) is not easily shown in the attached drawings and is an existing technology, so it is not marked in the attached drawings. Compared with the mainstream filter, the difference of this white mud filtering device lies in that the sector plate 301 is composed of a first sieve cover plate 3011, a second sieve cover plate 3012, and a connector 3013. As Figure 9 and Figure 10 As shown in, a number of reinforcing ribs 3015 are welded at equal intervals on the inner sides of the first sieve cover plate 3011 and the second sieve cover plate 3012 respectively. The reinforcing ribs 3015 are in a "T" shape. The reinforcing ribs 3015 of the first sieve cover plate 3011 and the second sieve cover plate 3012 are arranged at intervals, so that the reinforcing ribs 3015 are arranged at intervals after assembly. The first sieve cover plate 3011 and the second sieve cover plate 3012 are respectively provided with a number of reinforcing plates 3016, and a number of buckles 3017 are arranged on the reinforcing plates 3016. The top surface of the reinforcing rib 3015 contacts the reinforcing plate 3016 of the opposite first sieve cover plate 3011 or the second sieve cover plate 3012 after assembly. A number of card slots 3018 for cooperating with the buckles 3017 are arranged on the top surface of the reinforcing rib 3015. When the first sieve cover plate 3011 serving as the right side plate and the second sieve cover plate 3012 serving as the left side plate are aligned front and back and slide from top to bottom, all the buckles 3017 are inserted into the card slots 3018, so that the first sieve cover plate 3011 and the second sieve cover plate 3012 complete the snap connection, and as Figure 10 As shown in, except for the contact points of the snap connection, the parts where other reinforcing ribs 3015 contact the reinforcing plates 3016 are spot welded to increase their connection strength. The first sieve cover plate 3011 and the second sieve cover plate 3012 after snap connection and assembly are spot welded around to increase the strength, and the connector 3013 is welded at the bottom.

[0031] As Figure 8 and Figure 9As shown in the figure, the connector 3013 is tubular, and connection steps 3014 parallel to the sector plate 301 are respectively arranged on both sides. The main shaft 5 is provided with a connection socket 501 for cooperating with the connector. Meanwhile, an annular slot 502 for cooperating with the connection step 3014 is arranged in the connection socket 501, and a step through slot 503 in the left - right direction and larger than the connection step 3014 is provided. When installing the sector plate 301 on the main shaft 5, first insert the connector 3013 into the connection socket 501. During this process, the connection step 3014 needs to pass through the step through slot 503. Then rotate the entire sector plate 301 by 90°, so that the annular slot 502 catches the connection step 3014, completing the installation of one sector plate 301 on the main shaft 5. Since the sector plate 301 needs to be rotationally installed, a gap should be left between adjacent sector plates 301.

[0032] To enhance the overall strength of the filter disc 3 after assembly, as Figure 7 、 Figure 11 、 Figure 12 and Figure 13 shown in the figure, the filter disc 3 further includes a plurality of outer brackets 302 and inner brackets 303, and the outer brackets 302 and inner brackets 303 are sector - shaped. An outer bracket 302 is arranged at the outer end of each sector plate 301. The front and rear ends of the outer bracket 302 are respectively arranged as parallel inclined - plane ends 3021. Adjacent outer brackets 302 are locked after a first bolt 304 passes through the two inclined - plane ends 3021 horizontally; Limiting slots 3031 for cooperating with the inner ends of the sector plates 301 (taking the filter disc axis as the reference, the end close to the axis is the inner end, and the other end is the outer end) are respectively arranged on the front and rear sides of the inner bracket 303. The inner bracket 303 is arranged between adjacent two sector plates 301, and is clamped on the left and right sides of the sector 301 and locked by a second bolt 305. Considering the wear problem during long - term use, the first bolt 304 and the second bolt 305 are used in combination with the bolt itself + nut 306, avoiding directly drilling threaded holes and facilitating part replacement.

[0033] To improve the strength of the combined outer brackets, the limit in the front - rear direction between adjacent outer brackets 302 is increased. Specifically, as Figure 11 and Figure 12As shown in the figure, a pin hole 3022 and a telescopic bolt 3023 are respectively arranged at both inclined plane ends 3021 of the outer bracket 302. The bottom of the inner end of the telescopic bolt 3023 is provided with a rack, and a gear 3024 meshing with the rack is arranged in the outer bracket 302. A regular polygon limit through hole 3025 is arranged at the axis of the gear 3024. The first bolt 304 is provided with a limit block 3041 matching with the limit through hole 3025, and a chamfer facilitating passing through the limit through hole 3025 is arranged at one end of the limit block 3041 close to the matching nut. The diameter of the threaded end of the first bolt 304 is smaller than the width of the limit block 3041. When the first bolt 304 is installed, its threaded end passes through the limit through hole 3025 and is connected with the matching nut. A connecting groove 3026 matching with the sector plate 301 is arranged on the inner side of the outer bracket 302. An insert block 3027 is arranged in the connecting groove 3026, and an insert groove 3019 matching with the insert block 3027 is arranged on the sector plate 301, so that the outer bracket 302 can be stuck at the top of the sector plate 301 in a way of inlaying connection through the insert block 3027 and the insert groove 3019. When the first bolt 304 passes through the limit through hole 3025 and is connected with the matching nut, during this period, the limit block 3041 will gradually insert into the limit through hole 3025. At this time, rotating the first bolt 304 will drive the gear 3024 to rotate synchronously. While locking the first bolt 304, the gear 3024 will also drive the telescopic bolt 3023 to extend into the adjacent pin hole 3022 synchronously, realizing the locking in the front-back direction between adjacent outer brackets 302.

[0034] When all the outer brackets 302 and inner brackets 303 are installed and locked, all the sector plates 301 are limited on the main shaft 3 and cannot complete the rotation and pulling actions on the main shaft 3, and cannot be disassembled. When a certain sector plate 301 needs to be disassembled, by removing the corresponding inner bracket 303 and loosening the first bolt 304 on the corresponding outer bracket 302, the limit on the sector plate 301 is released, and at this time the sector plate 301 can be disassembled.

[0035] The tank body 2 includes blanking grooves 201 corresponding to the filter disks 3 one by one. Scraping devices 4 matching with the filter disks 3 are respectively arranged on the left and right sides of each blanking groove 201. Considering that in order to improve efficiency, enterprises now require larger diameters of filter disks. Even if the filter disks with strengthened structures are still prone to yaw, resulting in damage to the filter disks 3 by the scraping devices 4. To avoid this problem, the scraping devices 4 are enhanced with adaptive capabilities and can be adjusted according to the yaw of the filter disks 3. Such as Figures 1 to 6As shown in the figure, the scraping device 4 includes a scraper 401, an adaptive base 402, a rotating tool handle 403, an elastic member 404, and a guide wheel 405. A left and right slide rail 2011 is respectively arranged on the front and rear sides of each blanking chute 201. A limit slider 4021 that cooperates with the left and right slide rails 2011 is arranged at the bottom of the adaptive base 402, and the adaptive base 402 is slidably arranged within the left and right slide rails 2011. The adaptive base 402 is hinged with a horizontally rotatable rotating tool handle 403. The two ends of the scraper 401 are fixedly connected between two relatively front and rear rotating tool handles 403. A guide wheel 405 that cooperates with the outer bracket 302 or the inner bracket 303 is arranged at the top of the adaptive base 402. An elastic member 404 (preferably a spring) that enables the adaptive base 402 to be close to the outer bracket 302 or the inner bracket 303 is arranged within the left and right slide rails 2011.

[0036] Considering that the surface of the filter cloth 309 after inflation is convex, not flat, and is a convex surface that is slightly lower around the edges than in the middle, the current scraper cannot scrape the edges of the filter cloth 309, which will cause the problem of incomplete scraping. Therefore, as Figure 1 and Figure 2 shown in the figure, the left and right sides of the outer bracket 302 and the outer sides of the inner bracket 303 are arranged as arc-shaped convex surfaces, and the blade of the scraper 401 is an arc-shaped downward.

[0037] Since the thickness of the filter cake filtered out by different slurries is different, the distance between the scraper 401 and the filter disc 3 should be adjusted appropriately to ensure the scraping effect. Therefore, as Figure 4 and Figure 6 shown in the figure, the scraper 401 is provided with a rotating shaft 4011 that penetrates through the front and rear ends. The scraper 401 is rotatably connected to the front and rear rotating tool handles 403 through the rotating shaft 4011, and a locking mechanism is provided. The locking mechanism shown in the figure is a locking nut 406 and a connecting pipe 407. The connecting pipe 407 is welded on the rotating tool handle 403. The connecting pipe 407 is provided with an external thread that cooperates with the locking nut 406 and is provided with a notch. The rotating shaft 4011 of the scraper 401 is inserted into the connecting pipe 407 and is locked by the locking nut 406. When it is necessary to adjust the distance between the scraper 401 and the filter disc 3, the locking nut 406 is loosened and the scraper 401 is rotated to adjust the angle and then re-locked to achieve the adjustment of the distance between the scraper 401 and the filter disc 3.

[0038] In order to be able to quickly convey the filtered blanking, the white mud filtering device further includes a conveying device 8. A conveying chute 202 located at the bottom of the blanking chute 201 is arranged in the trough body 2. A conveying device 8 is arranged within the conveying chute 202. As Figure 1 and Figure 3 shown in the figure, the conveying device 8 is a spiral conveying rod 81 driven by a motor.

[0039] When the filter disc 3 has a yaw, the outer support 302 and the inner support 303 on the filter disc 3 will yaw synchronously. At the same time, the guide wheel 405 in contact with the outer support 302 and the inner support 303 is stressed and will also transmit the force to the corresponding adaptive base 402, so that the adaptive base 402 makes a synchronous slide in the left and right slide rails 2011 following the yaw direction. Since the yaw amplitude of the outer circle of the filter disc 3 is larger, the sliding amplitude of the front adaptive base 402 in the left and right slide rails 2011 will be greater than that of the rear adaptive base 402. At this time, the rotary tool holder 403 hinged on the adaptive base 402 makes a rotation action, so that the scraper 401 can always maintain the distance from the filter disc 3 and avoid damaging the filter cloth 309 with the scraper.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A white mud filtering device, which consists of an integral bracket (1), a tank body (2), a filter disc (3), a scraping device (4), a main shaft (5), a transmission device (6), a shunt device (7) and a vacuum device. The filter disc (3) is composed of a plurality of sector plates (301) and filter cloth (309); it is characterized in that: The sector plate (301) is composed of a first sieve cover plate (3011), a second sieve cover plate (3012) and a connector (3013). The first sieve cover plate (3011) and the second sieve cover plate (3012) are assembled by setting snap connections, and the connector (3013) matched with the main shaft (5) is welded at the inner end after assembly. The connector (3013) is tubular, and connecting steps (3014) parallel to the sector plate (301) are respectively arranged on both sides. The main shaft (5) is provided with an annular card slot (502) matched with the connecting step (3014), and a step through slot (503) in the left - right direction and larger than the connecting step (3014) is provided. The filter disc (3) further includes a plurality of outer brackets (302) and inner brackets (303), and the outer brackets (302) and inner brackets (303) are sector - shaped. An outer bracket (302) is arranged at the outer end of each sector plate (301). The front and rear ends of the outer bracket (302) are respectively arranged as parallel inclined plane ends (3021), and adjacent outer brackets (302) are locked after a first bolt (304) passes through the two inclined plane ends (3021) horizontally. Limiting card slots (3031) matched with the inner end of the sector plate (301) are respectively arranged on the front and rear sides of the inner bracket (303). The inner bracket (303) is arranged between two adjacent sector plates (301), and is clamped on the left and right sides of the sector plate (301) and locked by a second bolt (305). The trough body (2) includes blanking troughs (201) corresponding to the filter discs (3) one by one. Scraping devices (4) matched with the filter discs (3) are respectively arranged on the left and right sides of each blanking trough (201). The scraping device (4) includes a scraper (401), an adapting base (402), a rotating tool handle (403), an elastic member (404) and a guide wheel (405). Left - right sliding rails (2011) are respectively arranged on the front and rear sides of the blanking trough (201). The adapting base (402) is slidably arranged in the left - right sliding rails (2011). The adapting base (402) is hinged with a horizontally rotating rotating tool handle (403). The two ends of the scraper (401) are fixedly connected between two relatively front - rear rotating tool handles (403). A guide wheel (405) matched with the outer bracket (302) or the inner bracket (303) is arranged at the top of the adapting base (402). An elastic member (404) for making the adapting base (402) close to the outer bracket (302) or the inner bracket (303) is arranged in the left - right sliding rails (2011). A plurality of reinforcing ribs (3015) are respectively arranged at equal intervals on the inner sides of the first sieve cover plate (3011) and the second sieve cover plate (3012). The reinforcing ribs (3015) are "T" - shaped. The first sieve cover plate (3011) and the second sieve cover plate (3012) are respectively provided with a plurality of reinforcing plates (3016). The reinforcing plates (3016) are provided with a plurality of snaps (3017). The reinforcing ribs (3015) are provided with a plurality of card slots (3018) matched with the snaps (3017). One pin hole (3022) and one telescopic bolt (3023) are respectively arranged at two inclined plane ends (3021) of the outer support (302); the bottom of the inner end of the telescopic bolt (3023) is provided with a rack, a gear (3024) meshing with the rack is arranged in the outer support (302), a regular polygon limiting through hole (3025) is arranged at the axis center of the gear (3024), a limiting block (3041) matched with the limiting through hole (3025) is arranged on the first bolt (304), and the diameter of the threaded end of the first bolt (304) is smaller than the width of the limiting block (3041). A connecting groove (3026) matched with the sector plate (301) is arranged on the inner side of the outer support (302), an insert block (3027) is arranged in the connecting groove (3026), and an insert groove (3019) matched with the insert block (3027) is arranged on the sector plate (301).

2. The white mud filtering device according to claim 1, characterized in that: A rotating shaft (4011) penetrating through the front and rear ends is arranged on the scraping knife (401), the scraping knife (401) is rotationally connected with the rotating knife handles (403) on the front and rear sides through the rotating shaft (4011), and a locking mechanism is arranged.

3. The white mud filtering device according to claim 1, characterized in that: The left and right sides of the outer support (302) and the outer side of the inner support (303) are provided with arc-shaped convex surfaces, and the cutting edge of the scraping knife (401) is an arc shape downward.

4. The white mud filtering device according to claim 1, characterized in that: The white mud filtering device further includes a conveying device (8), a conveying groove (202) located at the bottom of the blanking groove (201) is arranged in the tank body (2), and the conveying device (8) is arranged in the conveying groove (202).

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