Gravity type filter with stable filtering speed

Abstract

The invention discloses a gravity type filter with stable filtering speed, which comprises a tank body, the top of the tank body is communicated with a liquid inlet pipe, the bottom of the tank body is provided with a liquid outlet, a filtering piece with a conical structure is rotatably mounted in the tank body, and the whole filtering piece is gradually enlarged from top to bottom; the filter part comprises a filter screen with a conical structure and an annular pulp carrying plate which is horizontally distributed on the edge of the bottom of the filter screen, the annular pulp carrying plate is rotationally connected with the inner wall of the tank body, at least one scraper is arranged on the surface of the filter screen in the extending direction of the filter screen, and the scraper and the filter screen can synchronously and reversely rotate; a slurry pump is further installed on the top of the tank body, and a slurry discharging pipe connected to an inlet of the slurry pump extends downwards to the annular slurry carrying plate. Through the synergistic effect of the filter screen, the annular slurry carrying plate and the two scraping plates, filtered slurry can be pumped away in time, the situation that the slurry stays on the filter screen for a long time and influences the filtering effect of the slurry is avoided, and waste of liquid materials can be completely eradicated.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and in particular to a gravity filter with a stable filtering speed. Background Art

[0002] A gravity filter is a device that relies on the weight of the liquid to filter. It has been widely used in various industries, especially in the filtering of muddy water. The gravity filter in the prior art is to install a filter screen inside the filter tank, and then the liquid to be filtered enters the filter tank. The liquid falls onto the filter screen under the action of gravity, the solid matter in the liquid is filtered out, and the filtrate is recycled. For example, a Chinese patent discloses a patent number CN215585702U, which is named a new type of gravity filter. The filter is installed with a conical annular filter screen inside the filtrate pool. After the liquid is filtered by the annular filter screen, the filtrate enters the filtrate pool, and the filter residue is discharged from the bottom of the annular filter screen through the slurry outlet. If the annular filter screen is blocked and the spray pipe cannot clean the annular filter screen in time, part of the liquid will be discharged directly from the slurry outlet, which will not only affect the filtration speed of the filter, but also cause waste of liquid. In view of the above situation, the present invention proposes a gravity filter with a stable filtration speed. Summary of the invention

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a gravity filter with a stable filtration speed.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gravity filter with a stable filtering speed, comprising a tank body, a liquid inlet pipe is connected to the top of the tank body, a liquid outlet is opened at the bottom, a filter element with a conical structure is rotatably installed inside the tank body, and the entire filter element gradually increases from top to bottom; the filter element comprises a filter screen with a conical structure and an annular pulp-carrying plate horizontally distributed at the bottom edge of the filter screen, wherein the annular pulp-carrying plate is rotatably connected to the inner wall of the tank body, at least one scraper is arranged on the surface of the filter screen along its extension direction, and the scraper and the filter screen can synchronously rotate in the opposite direction; a mud pump is also installed on the top of the tank body, a slurry discharge pipe connected to the inlet of the mud pump extends downward to the annular pulp-carrying plate, and the slurry discharge pipe is fixed to the fixing plate on the inner wall of the tank body; The fixing plate is distributed on the inner wall of the tank body along the vertical direction, and its bottom is closely fitted with the annular pulp-carrying plate, and its width is the same as that of the annular pulp-carrying plate; The bottom of the slurry discharge pipe is connected with a slurry guide box, the bottom of the slurry guide box is fitted with the annular slurry carrying plate, and the side away from the fixed plate is open, and the slurry guide box is connected with the slurry discharge pipe.

[0005] Preferably, a mud discharge port is also provided on the outer wall of the tank body, and a push plate matching the mud discharge port is arranged inside the tank body at a position corresponding to the mud discharge port. A slider is connected to the side of the push plate facing away from the mud discharge port. The slider is a frame-type structure with openings at the top and bottom. Limit seats are fixed on the fixed plate corresponding to the top and bottom of the slider, respectively. The slider is located between the two limit seats and is connected to them in a horizontal direction for sliding. The slurry discharge pipe passes through the two limit seats. A telescopic rod is also connected between the inside of the slider and the pipe wall of the slurry discharge pipe, and a spring is sleeved on the outside of the telescopic rod. In the initial state, a gap is reserved between the push plate and the mud discharge port, and the scraper contacts the slider during rotation to drive the slider to move toward the mud discharge port.

[0006] Preferably, the side of the slider facing the filter is integrally connected with a building block with an inclined structure, and the position on the scraper corresponding to the building block is integrally connected with a right-angled protrusion. During the clockwise rotation of the scraper, the protrusions distributed on it act on the building block on the slider, causing the slider to move toward the mud discharge port.

[0007] Preferably, a rotating shaft is fixedly connected to the top of the filter screen, and the rotating shaft extends upward to the top of the tank body and is connected to a motor fixed to the top of the tank body; a circle of limiting grooves is provided at the bottom of the annular pulp carrier plate, and a limiting support seat corresponding to the position of the limiting groove is fixed on the inner wall of the tank body, and the annular pulp carrier plate is located on the limiting support seat and is slidably connected to it.

[0008] Preferably, the outer rotating sleeve of the rotating shaft is connected with an outer sleeve, the scraper is fixedly connected to the bottom of the outer sleeve, the top of the outer sleeve is connected with a rotating sleeve, and a hanging tube is fixed at the top of the inner side of the tank body at a position corresponding to the rotating sleeve, and the rotating sleeve and the hanging tube form a clamping structure and the two are connected in a rotating cooperation manner; A first gear and two second gears are respectively arranged inside the rotating sleeve, wherein the two second gears are symmetrically distributed on both sides of the first gear and meshed with it, the wheel core axis at the center of the two second gears passes through the rotating sleeve upward and is connected to the tank body for rotation, while the first gear is fixedly sleeved on the rotating shaft, and internal teeth meshing with the two second gears are distributed on the inner wall of the rotating sleeve.

[0009] Compared with the prior art, the present invention provides a gravity filter with a stable filtration speed, which has the following beneficial effects: (1) The present invention has a filter installed inside the tank body, and the filter is a conical structure with a small top and a large bottom. Two scrapers are installed outside the filter. The two scrapers rotate in the opposite direction to the surface of the filter. After the liquid to be filtered falls on the filter under the action of gravity, the mud stays on the filter. The mud slides down to the annular slurry-carrying plate under the action of gravity. The mud gathered on the annular slurry-carrying plate will be accumulated at the bottom of the slurry discharge pipe due to the rotation of the annular slurry-carrying plate, and will eventually be pumped away in time by the slurry pump. The two scrapers rotate in the opposite direction relative to the filter to prevent it from being blocked by the mud. The present invention can timely pump out the filtered mud through the synergistic effect of the filter, the annular slurry-carrying plate and the two scrapers, and prevent it from staying on the filter for a long time and affecting its filtering effect. In addition, this mud removal mode can also eliminate the waste of liquid.

[0010] (2) When facing the mud removal operation, the present invention also installs a slider at the mud discharge port. The building blocks on one side of the slider can just cooperate with the protrusions on the scraper, driving the slider to slide toward the mud discharge port. The push plate on the slider can periodically push the accumulated mud to the outside of the mud discharge port, thereby accelerating the discharge speed of the mud and ensuring the stability of the filtering speed of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the entire gravity filter in the implementation of the present invention; Figure 2 Schematic diagram of the internal structure of the entire gravity filter in an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the entire gravity filter in an embodiment of the present invention, and the scraper is not included in the figure; Figure 4 This is a schematic diagram of assembling the slider on the fixed plate in the embodiment; Figure 5 A schematic diagram of the distribution of the internal limit support seats of the tank body proposed in the embodiment; Figure 6 It is a schematic diagram of the assembly of the scraper and the filter element in the embodiment; Figure 7 It is a schematic diagram of the connection between the rotating sleeve and the hanging tube in the embodiment; Figure 8 It is a schematic diagram of the front view structure of the entire interior of the tank body in the embodiment.

[0012] In the figure: 1. tank body; 2. liquid inlet pipe; 3. motor; 4. mud pump; 5. mud outlet; 6. filter element; 61. filter screen; 62. annular slurry carrier plate; 7. liquid outlet; 8. scraper; 9. fixed plate; 10. slurry discharge pipe; 11. rotating shaft; 12. slurry guide box; 13. slider; 14. telescopic rod; 15. spring; 16. push plate; 17. limit seat; 18. building block; 19. protrusion; 20. outer sleeve; 21. rotating sleeve; 22. hanging tube; 23. second gear; 24. first gear; 25. inner teeth; 26. limit slide groove; 27. limit support seat. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0014] This embodiment provides a gravity filter with a stable filtration speed, such as Figures 1 to 8 As shown, it includes a tank body 1, the top of the tank body 1 is connected with a liquid inlet pipe 2, and the bottom is provided with a liquid outlet 7. A filter element 6 with a conical structure is rotatably installed inside the tank body 1, and the entire filter element 6 gradually increases from top to bottom. After the muddy water is injected into the tank body 1 through the liquid inlet pipe 2, it falls onto the filter element 6 under the action of gravity, and then under the filtering action of the filter element 6, the filtrate in the muddy water enters the bottom of the tank body 1 and is finally discharged from the liquid outlet 7. Since the filter element 6 in the present invention has a conical structure with a small top and a large bottom, the mud attached to the filter element 6 will flow to the bottom edge of the filter element 6 under the action of gravity.

[0015] Whether the entire filter has a stable filtering speed actually directly depends on the filter element 6. If the filter element 6 can always be in an unobstructed state (the filter holes of the filter element 6 are not blocked), then its filtering speed is relatively stable. However, in actual work, with the long-term use of the filter element 6, more and more mud will adhere to the filter element 6. If these muds cannot be cleaned in time, it will easily cause the filter element 6 to be blocked, and finally affect its filtering speed. In view of this, the present invention mainly upgrades and improves the structure of the filter element 6. Specifically, the filter element 6 in the present invention includes a filter screen 61 with a conical structure and an annular slurry-carrying plate 62 horizontally distributed on the bottom edge of the filter screen 61, wherein the annular slurry-carrying plate 62 is rotatably connected to the inner wall of the tank body 1, and the surface of the filter screen 61 is provided with at least one scraper 8 along its extension direction. In this embodiment, two scrapers 8 are provided, and the two scrapers 8 can synchronously rotate in the opposite direction with the filter screen 61. When the muddy water enters the interior of the tank body 1 through the liquid inlet pipe 2, the filter screen 61 is in a uniform counterclockwise rotation state. In this state, muddy water continuously contacts the filter screen 61 in different areas, thereby being filtered and processed. While the filter screen 61 is filtering the muddy water during rotation, the two scrapers 8 can also rotate clockwise to scrape off the mud attached to the filter screen 61 to avoid clogging of the filter screen 61. After the scraper 8 scrapes off the mud on the filter screen 61, it will flow into the annular pulp carrier plate 62 under the action of gravity. If too much mud accumulates on the annular pulp carrier plate 62, it will still affect the filtration of the filter screen 61. Therefore, it is necessary to clear the mud on the annular pulp carrier plate 62 in time. Therefore, the present invention chooses to install a mud pump 4 on the top of the tank body 1, and the slurry discharge pipe 10 connected to the inlet of the mud pump 4 extends downward to the annular slurry carrying plate 62. When the filter is working, the mud pump 4 is started to generate negative pressure inside the slurry discharge pipe 10, and the mud on the annular slurry carrying plate 62 will be sucked into the slurry discharge pipe 10. Since the filter screen 61 and the annular slurry carrying plate 62 are always in a rotating state, the present invention deliberately installs a fixing plate 9 on the inner wall of the tank body 1 to fix the slurry discharge pipe 10 on the fixing plate 9. In addition, the fixing plate 9 is not only used to fix the slurry discharge pipe 10. Since the annular slurry carrying plate 62 is always in a rotating state, the fixing plate 9 can also make the mud gather at the bottom of the slurry discharge pipe 10, thereby promoting the smooth discharge of the mud.

[0016] As a preferred embodiment, the fixed plate 9 in the present invention is distributed along the vertical direction on the inner wall of the tank body 1, and its bottom is arranged in close contact with the annular slurry carrying plate 62, and its width is the same as the annular slurry carrying plate 62. When the annular slurry carrying plate 62 carries the mud and rotates counterclockwise, the mud is blocked when passing through the fixed plate 9, thereby forcing all the mud to accumulate at the bottom of the slurry discharge pipe 10, avoiding the "vacuum suction" phenomenon in the slurry discharge pipe 10.

[0017] Furthermore, under normal circumstances, the bottom opening of the slurry discharge pipe 10 faces downward, so the mud can only enter the slurry discharge pipe 10 when negative pressure is generated inside the slurry discharge pipe 10, and with the rotation of the annular slurry carrying plate 62, the mud near the slurry discharge pipe 10 is continuously squeezed, and it has a tendency to flow toward the fixed plate 9, which will increase the resistance of the mud entering the slurry discharge pipe 10. In view of this, the present invention chooses to connect a slurry guide box 12 at the bottom of the slurry discharge pipe 10, and the bottom of the slurry guide box 12 is fitted with the annular slurry carrying plate 62, and the side away from the fixed plate 9 is open, and the slurry guide box 12 is connected with the slurry discharge pipe 10. With the rotation of the annular slurry carrying plate 62, the mud directly enters the interior of the slurry guide box 12, and since the slurry guide box 12 is directly connected to the slurry discharge pipe 10, the mud is sucked into the slurry discharge pipe 10 after entering the interior of the slurry guide box 12.

[0018] In the actual operation process, if the mud content in the mud water is not high, the mud accumulated on the annular slurry carrying plate 62 can be pumped out only by the mud pump 4. However, if the mud content in the mud water is large, and because the annular slurry carrying plate 62 is in a rotating state, a large amount of mud will gather at the slurry guide box 12 in a short time. At this time, the mud pump 4 cannot smoothly pump out the mud, so the mud will in turn accumulate on the filter screen 61, which will affect the filtering effect. Therefore, the present invention also provides a mud discharge port 5 on the outer wall of the tank body 1, and a push plate 16 adapted to the mud discharge port 5 is arranged at the position of the tank body 1 at the inside of the tank body 1. The push plate 16 is connected to the side of the push plate 16 away from the mud discharge port 5. The slider 13 is a frame-type structure with openings at the top and the bottom. The fixed plate 9 is fixed with limited seats 17 corresponding to the top and the bottom of the slider 13. The block 13 is between the two limit seats 17 and is connected to them in a horizontal sliding manner. The slurry discharge pipe 10 passes through the two limit seats 17. A telescopic rod 14 is also connected between the inside of the slider 13 and the pipe wall of the slurry discharge pipe 10. A spring 15 is sleeved on the outside of the telescopic rod 14. A gap is reserved between the push plate 16 and the mud discharge port 5 in the initial state. When the annular slurry carrying plate 62 rotates, part of the mud gathered at the position of the slurry guide box 12 is pumped away by the mud pump 4, and the other part is squeezed on the fixed plate 9. Although a small part of the mud can flow out from the mud discharge port 5, the flow rate of the mud is not fast, and relying on its own fluidity is far from meeting the mud cleaning speed. Therefore, it is necessary to drive the slider 13 by external force to drive the push plate 16 to move toward the mud discharge port 5, and apply force to the mud through the push plate 16 to make it quickly discharged from the mud discharge port 5. In the present invention, the scraper 8 applies a force to the slider 13 , and the scraper 8 contacts the slider 13 during the rotation process, driving the slider 13 to move toward the mud discharge port 5 .

[0019] Specifically, the slider 13 in the present invention is integrally connected with a building block 18 with an inclined structure on one side facing the filter screen 61, and a right-angled protrusion 19 is integrally connected at a position corresponding to the building block 18 on the scraper 8. During the clockwise rotation of the scraper 8, the protrusions 19 distributed thereon act on the building block 18 on the slider 13, so that the slider 13 moves toward the mud discharge port 5, and the push plate 16 acts on the mud to push it to the mud discharge port 5. During the movement of the slider 13 toward the mud discharge port 5, the telescopic rod 14 is shortened. The spring 15 outside it is squeezed, and when the protrusion 19 is out of contact with the building block 18, the telescopic rod 14 is reset under the reaction of the spring 15, and the push plate 16 returns to the initial position. In the process that the other protrusion 19 rotates to contact with the building block 18, more mud gathers between the push plate 16 and the mud discharge port 5. After the other protrusion 19 contacts with the building block 18, the push plate 16 can push the mud to the mud discharge port 5 again. This cycle is repeated, and the mud is smoothly discharged to the outside of the tank body 1 through the mud pump 4 and the mud discharge port 5.

[0020] The filter screen 61 in the present invention is in a rotating state inside the tank body 1, and is driven by the motor 3 on the top of the tank body 1. Specifically, the top of the filter screen 61 is fixedly connected with a rotating shaft 11, and the rotating shaft 11 extends upward to the top of the tank body 1 and is connected to the motor 3 fixed on the top of the tank body 1. Since the filter screen 61 needs to carry muddy water with mud, in order to improve its stability inside the tank body 1, in this embodiment, a circle of limiting grooves 26 are provided at the bottom of the annular slurry-carrying plate 62, and a matching limiting support seat 27 is fixed on the inner wall of the tank body 1 corresponding to the position of the limiting groove 26, and the annular slurry-carrying plate 62 is seated on the limiting support seat 27 and is slidably connected thereto.

[0021] Furthermore, in the present invention, both the filter screen 61 and the scraper 8 are driven by the motor 3 to rotate in opposite directions. To achieve this purpose, the present invention has an outer sleeve 20 rotatably sleeved on the outside of the rotating shaft 11, two scrapers 8 are fixedly connected to the bottom of the outer sleeve 20, and a rotating sleeve 21 is connected to the top of the outer sleeve 20. A hanging tube 22 is fixed at the top of the inner side of the tank body 1 at the position corresponding to the rotating sleeve 21. The rotating sleeve 21 and the hanging tube 22 form a clamping structure and the two are connected in rotation. A first gear 24 and two second gears 23 are respectively arranged inside the rotating sleeve 21, wherein the two second gears 23 are symmetrically distributed on both sides of the first gear 24 and meshed with it, and the wheel core axis at the center of the two second gears 23 passes through the rotating sleeve 21 upward and is connected to the tank body 1 in rotation, and the first gear 24 is fixedly sleeved on the rotating shaft 11, and the inner wall of the rotating sleeve 21 is distributed with internal teeth 25 meshed with the two second gears 23. When the motor 3 drives the rotating shaft 11 to rotate counterclockwise, the rotating shaft 11 rotates and drives the first gear 24 to rotate synchronously therewith. The first gear 24 meshes with the two second gears 23, causing the two second gears 23 to rotate clockwise, and the internal teeth 25 inside the rotating sleeve 21 mesh with the two second gears 23, thereby driving the rotating sleeve 21 to rotate clockwise. The rotating sleeve 21 eventually drives the scraper 8 and the protrusion 19 to rotate clockwise, and when the protrusion 19 rotates clockwise, it contacts the building block 18 and can drive the slider 13 to slide toward the mud discharge port 5.

[0022] In the description of the present invention, the terms "first", "second", "another", and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0024] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A gravity filter with a stable filtering speed, comprising a tank body (1), the top of the tank body (1) is connected to a liquid inlet pipe (2), and the bottom is provided with a liquid outlet (7), characterized in that: A filter element (6) having a conical structure is rotatably mounted inside the tank body (1), and the entire filter element (6) gradually increases in size from top to bottom; the filter element (6) comprises a filter screen (61) having a conical structure and an annular pulp-carrying plate (62) horizontally distributed on the bottom edge of the filter screen (61), wherein the annular pulp-carrying plate (62) is rotatably connected to the inner wall of the tank body (1), and at least one scraper (8) is arranged on the surface of the filter screen (61) along its extension direction, and the scraper (8) and the filter screen (61) can synchronously rotate in opposite directions; a mud pump (4) is also mounted on the top of the tank body (1), and a mud discharge pipe (10) connected to the inlet of the mud pump (4) extends downward to the annular pulp-carrying plate (62), and the mud discharge pipe (10) is fixed to a fixing plate (9) on the inner wall of the tank body (1); The fixing plate (9) is distributed on the inner wall of the tank body (1) in a vertical direction, and its bottom is arranged to be in close contact with the annular pulp-carrying plate (62), and its width is the same as that of the annular pulp-carrying plate (62). The bottom of the slurry discharge pipe (10) is connected to a slurry guide box (12), the bottom of the slurry guide box (12) is arranged in close contact with the annular slurry carrying plate (62), and the side of the slurry guide box (12) facing away from the fixed plate (9) is open, and the slurry guide box (12) is connected to the slurry discharge pipe (10).

2. A gravity filter with a stable filtration speed according to claim 1, characterized in that: The outer wall of the tank body (1) is also provided with a mud discharge port (5), and a push plate (16) matching the mud discharge port (5) is arranged inside the tank body (1), and a slider (13) is connected to the side of the push plate (16) facing away from the mud discharge port (5). The slider (13) is a frame-shaped structure with openings at the top and bottom. The fixed plate (9) is respectively fixed with limit seats (17) at the top and bottom of the slider (13). The slider (13) is connected to the two limit seats (17) ) and are connected thereto in a horizontal sliding manner, the slurry discharge pipe (10) passes through the two limit seats (17), a telescopic rod (14) is connected between the interior of the slider (13) and the wall of the slurry discharge pipe (10), a spring (15) is sleeved on the exterior of the telescopic rod (14), a gap is reserved between the push plate (16) and the slurry discharge port (5) in an initial state, the scraper (8) contacts the slider (13) during the rotation process, and drives the slider (13) to move in the direction of the slurry discharge port (5).

3. A gravity filter with a stable filtration speed according to claim 2, characterized in that: A block (18) having an inclined structure is integrally formed and connected to one side of the slider (13) facing the filter screen (61), and a right-angled protrusion (19) is integrally formed and connected to a position on the scraper (8) corresponding to the protrusion (18). During the clockwise rotation of the scraper (8), the protrusion (19) distributed on the scraper (8) acts on the protrusion (18) on the slider (13), causing the slider (13) to move toward the mud discharge port (5).

4. A gravity filter with a stable filtration speed according to any one of claims 1 to 3, characterized in that: The top of the filter screen (61) is fixedly connected to a rotating shaft (11), and the rotating shaft (11) extends upward to the top of the tank body (1) and is connected to a motor (3) fixed to the top of the tank body (1); a circle of limiting slide grooves (26) are provided at the bottom of the annular pulp carrier (62), and a limiting support seat (27) matching the limiting slide groove (26) is fixed on the inner wall of the tank body (1) at a position corresponding to the limiting slide groove (26), and the annular pulp carrier (62) is seated on the limiting support seat (27) and is slidably connected thereto.

5. A gravity filter with a stable filtration speed according to claim 4, characterized in that: The outer rotatable sleeve of the rotating shaft (11) is connected to an outer sleeve (20), the scraper (8) is fixedly connected to the bottom of the outer sleeve (20), the top of the outer sleeve (20) is connected to a rotating sleeve (21), a hanging tube (22) is fixed to the top of the inner side of the tank body (1) at a position corresponding to the rotating sleeve (21), the rotating sleeve (21) and the hanging tube (22) form a clamping structure and the two are connected in a rotatable manner; A first gear (24) and two second gears (23) are respectively arranged inside the rotating sleeve (21), wherein the two second gears (23) are symmetrically distributed on both sides of the first gear (24) and mesh with the first gear (24), the wheel core axis at the center of the two second gears (23) passes through the rotating sleeve (21) in an upward direction and is rotatably connected to the tank body (1), while the first gear (24) is fixedly sleeved on the rotating shaft (11), and internal teeth (25) meshing with the two second gears (23) are distributed on the inner wall of the rotating sleeve (21).

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