A scraper for a fibre disc filter

Abstract

The utility model discloses a kind of fiber rotating disc filter technical field, disclose a kind of fiber rotating disc filter with scraper, it include: scraper, scrape line, mounting plate and pull rope, scraper inside is equipped with backwashing cavity, scraper is equipped with the opening in communication with backwashing cavity, the opening end of scraper is contacted with fiber rotating disc surface;The top of scraper is equipped with slot, slot is equipped with elastic baffle, the both ends of slot are used to fix scrape line, the top end of scraper is closely contacted with fiber rotating disc by scrape line;The bottom end of scraper is equipped with elastic scraper strip, the bottom end of scraper is closely contacted with fiber rotating disc by elastic scraper strip, elastic scraper strip one end is fixed on scraper, scraper is fixed on mounting plate by connecting plate, mounting plate and pull rope are used to control the up-and-down movement of scraper.In the scheme, elastic scraper strip restores original position without contacting with fiber rotating disc when not needing to flush, scrape line and elastic scraper strip do not affect the rotation of fiber rotating disc when normal filtering, it is favorable to improve the filtering efficiency of fiber rotating disc.

Description

Technical Field

[0001] This utility model relates to the field of fiber disc filter technology, specifically to a scraper for a fiber disc filter. Background Technology

[0002] Fiber disc filters, as core equipment for advanced wastewater treatment, primarily achieve high-efficiency physical filtration through microporous fiber filter cloth and are widely used in municipal wastewater treatment. A fiber disc filter mainly consists of circular filter discs, a drive motor, a central water collection cylinder, and a backwashing device. Water in the filter enters the central water collection cylinder after being filtered through the circular filter discs and is then discharged. After the device has been operating for a period of time, sludge accumulates on the surface of the fiber filter cloth on the circular filter discs. At this time, by activating the negative pressure backwashing device, water in the central water collection cylinder flows in the opposite direction to the circular filter discs to wash away the sludge from the filter cloth. To improve washing efficiency and reduce backwashing resistance, scrapers are often used to remove the sludge. While existing scraper structures can effectively remove sludge... While scraping removes sludge, the following drawbacks exist in practical use: 1. The scraper of the backwashing device remains in constant contact with the filter disc, generating continuous frictional resistance even during non-cleaning periods, increasing the rotational resistance of the circular filter disc; 2. Continuous friction from the scraper during non-cleaning periods accelerates the wear of the fiber filter cloth, increasing maintenance costs; 3. More importantly, the existing scraper and backwash suction port are integrated, with the scraper acting as the edge of the suction port. Under negative pressure, the suction port adheres tightly to the circular filter disc, preventing the scraped sludge from entering the suction port and thus contaminating the water in the entire filtration tank. Therefore, there is an urgent need to improve the structure of the existing scraper to protect the fiber filter cloth while better suction of sludge. Utility Model Content

[0003] The present invention aims to provide a scraper for a fiber disc filter to solve the problem that the scraper currently affects the rotation of the fiber disc, resulting in low filtration efficiency of wastewater.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a scraper for a fiber disc filter, comprising: a scraper, scraping lines, a mounting plate, a connecting plate, and a pull rope. The scraper has a backwashing chamber inside, and an opening communicating with the backwashing chamber. The open end of the scraper contacts the surface of the fiber disc, and the length of the opening matches the width of the annulus formed by the fiber disc. The top of the scraper has a groove, the two ends of which are used to fix the scraping lines. The top of the scraper is in close contact with the fiber disc through the scraping lines. An elastic baffle is provided within the groove. The elastic baffle is used to close the slot. One side of the elastic baffle is fixed to the slot, and the other side of the elastic baffle is close to the scraping line. The bottom end of the scraper is provided with an elastic scraping strip. The bottom end of the scraper is in close contact with the fiber disc through the elastic scraping strip. One side of the elastic scraping strip is fixed to the scraper. The scraper is fixed to the mounting plate through a connecting plate. The mounting plate is hinged to the inner wall of the fiber disc filter tank at the end away from the fiber disc. The mounting plate is fixed to the inner wall of the fiber disc filter tank at the end near the fiber disc by a pull rope. The pull rope is located above the mounting plate.

[0005] The principle of this solution is as follows: First, the corresponding backwashing device is activated, allowing clean water in the central cylinder of the fiber disc filter to impact the fiber disc, thereby rinsing it. The fiber disc is then rotated via a transmission mechanism. The length of the pull rope is adjusted, causing the scraper to rotate downwards and move to the corresponding position on the fiber disc. Under the weight of the scraper itself and the rotation of the fiber disc, the scraper moves downwards and contacts the fiber disc. The pull rope is fixed when the scraper's opening is in contact with the preset position on the surface of the fiber disc. The elastic scraper strips of the scraper adhere to the fiber disc under the water pressure of the filter tank, and the scraper line adheres to the fiber disc. The scraper and the fiber disc move relative to each other, and the scraper line scrapes away the sludge from the filter cloth of the fiber disc. The sludge enters the backwash chamber through the slot and is then discharged through the corresponding pipe.

[0006] Advantages of this solution: When backwashing the fiber disc is required, the elastic scraper strip adheres to the fiber disc under the water pressure of the filter tank, ensuring close contact between the scraper and the fiber disc to remove sludge from its surface. When backwashing is not required, the elastic scraper strip returns to its original position and does not contact the fiber disc. The scraper strip and elastic scraper strip do not affect the rotation of the fiber disc during normal filtration, which helps improve the filtration efficiency of the fiber disc. Simultaneously, it avoids the wear on the fiber filter cloth caused by the scraper when the fiber disc does not require cleaning, as is common in traditional structures, extending the service life of the fiber filter cloth and reducing operating costs. The slotted design allows sludge from the outside of the scraper to enter the backwash chamber, preventing it from entering the filter tank and contaminating the water. Through the pull rope and mounting plate structure, the scraper is positioned on the surface of the fiber disc when cleaning is required, without obstructing liquid flow or affecting the liquid filtration speed during normal use of the fiber disc.

[0007] Preferably, scrapers are provided on the outer end faces of the fiber discs at both ends, and scrapers are symmetrically arranged between the fiber discs. This arrangement ensures that each filter surface of the fiber disc corresponds to a scraper, resulting in better cleaning effect.

[0008] Preferably, the mounting plate is mounted on the inner wall of the fiber disc filter via lugs and pins. The two ends of the pin are rotatably mounted on corresponding lugs, and the mounting plate is fixed to the pins. Directly hinged mounting plates to the inner wall of the fiber disc filter can easily lead to disc misalignment, preventing the scraper from making tight contact with the fiber disc. The lugs and pins limit unnecessary deflection of the mounting plate while allowing relative rotation between the mounting plate and the inner wall of the fiber disc filter.

[0009] Preferably, the elastic baffle is provided with a slit to facilitate bending. By providing the slit, the elastic baffle can bend under water pressure to form a corresponding sludge inlet, reducing the stiffness of the elastic baffle, using less force to achieve bending, reducing the force on the elastic baffle, and extending the service life of the elastic baffle.

[0010] Preferably, the elastic baffle has a through hole communicating with the gap. Stress is mostly concentrated at the end of the gap, and repeated bending can easily cause further tearing at the gap. By providing the through hole, stress is dispersed, minimizing damage to the elastic baffle.

[0011] Preferably, the through holes and slits are arranged in a one-to-one correspondence, and the through holes are circular. Circular holes provide better stress dispersion.

[0012] Preferably, the gaps are evenly spaced on the elastic baffle, so that the elastic baffle is evenly distributed under the pressure of pressurized water, avoiding excessive or insufficient local stress on the elastic baffle.

[0013] Preferably, the scraper is U-shaped or C-shaped.

[0014] Preferably, the bottom end of the elastic scraper is below the bottom end of the scraper. This allows water to come into rapid contact with the elastic scraper, making it easier for water pressure to act on the elastic scraper, and enabling the elastic scraper and the fiber turntable to adhere quickly.

[0015] Preferably, the elastic scraper is arc-shaped, with its opening facing the fiber turntable. The arc-shaped elastic scraper has strong deformation capacity, making it easier for the scraper to conform to the fiber turntable, resulting in better sludge removal from the turntable.

[0016] Preferably, the elastic scraper is made of rubber material. Rubber material has good elasticity and flexibility, can withstand repeated stretching and bending, and has a long service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the scraper installed on the fiber turntable in an embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the installation of the scraper in an embodiment of this utility model.

[0019] Figure 3 This is a partial structural diagram of the scraper and fiber turntable in an embodiment of the present invention.

[0020] Figure 4 This is a partial structural diagram of the scraper in an embodiment of the present utility model. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: scraper 1, backwash chamber 11, scraper line 2, elastic baffle 3, elastic scraper strip 4, fiber turntable 5, center cylinder 6, mounting plate 7, pull rope 8, and connecting plate 9.

[0023] Example:

[0024] A scraper for a fiber disc filter, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes: a scraper 1 and a scraper line 2. The scraper 1 has a backwash chamber 11 inside. The backwash chamber 11 is connected to a suction pipe and a backwash pump for extracting sewage from the backwash chamber 11.

[0025] The scraper 1 has an opening communicating with the backwash chamber 11. The open end of the scraper 1 contacts the surface of the fiber disc 5. A corresponding transmission mechanism causes the fiber disc 5 to rotate, and the scraper 1 and the fiber disc 5 move relative to each other. The scraper 1 removes sludge from the fiber disc 5 to maintain the high filtration efficiency of the subsequent fiber disc 5. Figure 1 As shown, in this embodiment, scrapers 1 are provided on the outer end faces of the fiber turntables 5 at both ends, and scrapers 1 are symmetrically provided between the fiber turntables 5. This arrangement makes each filter surface of the fiber turntable 5 correspond to the scraper 1, resulting in a better cleaning effect.

[0026] In this embodiment, the scraper 1 is U-shaped or C-shaped, and the opening of the scraper 1 is parallel to the radial direction of the fiber turntable 5.

[0027] The opening length of the scraper 1 is matched with the width of the ring formed by the fiber disc 5. In this embodiment, the opening length of the scraper 1 is slightly smaller than the width of the ring formed by the fiber disc 5. In this way, the two work together to achieve a better sludge removal effect on the fiber disc 5.

[0028] The top of the scraper 1 has a groove, and the two ends of the groove are used to fix the scraper wire 2. The top of the scraper 1 is in close contact with the fiber turntable 5 through the scraper wire 2. In this embodiment, the groove has mounting holes, and the two ends of the scraper wire 2 are respectively wrapped and fixed at the mounting holes. This solution can clean the fiber turntable 5 through the scraper wire 2, and the cleaned sludge can also enter the backwash chamber 11 through the opening. The groove allows the sludge on the outside of the scraper 1 to enter the backwash chamber 11, preventing it from entering the filter tank and contaminating the water in the filter tank. This avoids the problem in traditional methods where sludge cannot be sucked into the backwash chamber 11 in time during sludge removal.

[0029] The fiber turntable 5 and the central cylinder 6 in this solution are existing technologies, and this application does not improve upon them, so they will not be described in detail here.

[0030] An elastic baffle 3 is installed inside the slot to seal it. One side of the elastic baffle 3 is fixed to the slot, and the other side contacts the scraper line. By setting the elastic baffle 3, the slot can be sealed when rinsing is not required, minimizing the entry of water into the backwash chamber. When rinsing of the fiber turntable 5 is required, the elastic baffle 3 bends under water pressure, forming a sludge inlet between the elastic baffle 3 and the scraper line 2, allowing wastewater to enter the backwash chamber.

[0031] The top of the elastic baffle 3 has a slit to facilitate bending. In this design, the slit runs longitudinally through the top and bottom surfaces of the elastic baffle 3. By setting the slit, the elastic baffle 3 can bend under water pressure to form a corresponding sludge inlet, reducing the stiffness of the elastic baffle 3, achieving bending with less force, reducing the force on the elastic baffle 3, and extending its service life. In this embodiment, the slits are evenly spaced on the elastic baffle 3, ensuring that the force on the elastic baffle 3 is evenly distributed when subjected to pressurized water pressure, avoiding excessive or insufficient localized force on the elastic baffle 3.

[0032] The elastic baffle 3 has a through hole that communicates with the gap. Stress is mostly concentrated at the end of the gap, and repeated bending can easily cause further tearing at the gap. By setting the through hole, the stress is dispersed, and damage to the elastic baffle 3 is avoided as much as possible.

[0033] In this embodiment, the elastic baffle 3 is made of rubber. Rubber has good elasticity and flexibility, can withstand repeated stretching and bending, and has a long service life.

[0034] In this embodiment, the through-hole is circular, which improves stress dispersion. The through-holes and gaps are matched one-to-one, ensuring the opening is sealed while allowing the elastic baffle 3 to be easily bent to form a sewage inlet.

[0035] The bottom end of the scraper 1 is equipped with an elastic scraper strip 4, which is in close contact with the fiber disc 5. One side of the elastic scraper strip 4 is fixed to the scraper 1, specifically by bolts or adhesive. Clean water in the central cylinder 6 of the fiber disc filter impacts the fiber disc 5, thus rinsing it. Under the water pressure of the filter, the elastic scraper strip 4 of the scraper 1 adheres to the fiber disc 5. When rinsing is not required, the elastic scraper strip 4 returns to its original position and does not contact the fiber disc 5, thus not affecting the normal rotation of the fiber disc 5 during filtration. In this design, the scraper 1 and the elastic scraper strip 4 are respectively provided with grooves and protrusions to facilitate the positioning and installation of the elastic scraper strip 4 and further ensure the sealing of the connection between the two.

[0036] The elastic scraper 4 is made of rubber. Rubber has good elasticity and flexibility, can withstand repeated stretching and bending, and has a long service life.

[0037] The elastic scraper 4 is arc-shaped, with its opening facing the fiber turntable 5. The arc-shaped elastic scraper 4 has a strong deformation capacity, making it easier for the elastic scraper 4 to deform and fit together with the fiber turntable 5, resulting in a better sludge removal effect on the fiber turntable 5.

[0038] The bottom end of the elastic scraper 4 is located below the bottom end of the scraper 1. This allows water to come into rapid contact with the elastic scraper 4, making it easier for water pressure to act on the elastic scraper 4, and causing the elastic scraper 4 and the fiber turntable 5 to adhere quickly. In this embodiment, the thickness of the portion of the elastic scraper 4 located below the bottom end of the scraper 1 is less than the thickness of its upper portion, making it easier for the lower portion of the elastic scraper 4 to deform and adhere quickly to the fiber turntable 5.

[0039] It also includes a connecting plate 9, a mounting plate 7, and a pull rope 8. The scraper 1 is symmetrically mounted on the mounting plate 7 via the connecting plate 9. The connecting plate 9 is specifically fixed to the mounting plate 7 by bolts. The bolts facilitate the adjustment of the opening angle of the scraper 1, that is, the adjustment of the horizontal distance between the scraper 1 and the fiber cloth surface of the fiber turntable.

[0040] like Figure 2 As shown, the mounting plate 7 is hinged to the inner wall of the fiber disc filter tank at the end furthest from the fiber disc 5. The end of the mounting plate 7 closest to the fiber disc 5 is fixed to the inner wall of the fiber disc filter tank by a pull rope 8, which is positioned above the mounting plate 7. Through the structure of the pull rope 8 and the mounting plate 7, when the disc needs cleaning, the scraper 1 is positioned on the surface of the fiber disc 5, without obstructing the liquid and without affecting the liquid filtration speed during normal use of the fiber disc 5.

[0041] In this scheme, the pull rope 8 can be driven by a motor to retract the scraper 1 upwards to reduce the wear on the filter cloth of the rotating disc during filtration. When backwashing is required, the motor will be controlled to rotate in the opposite direction to release the pull rope 8, so that the scraper 1 will re-contact the fiber rotating disc 5 and flip downwards to a horizontal state under the drive of the fiber rotating disc 5, so as to achieve complete contact with the fiber rotating disc 5.

[0042] In this embodiment, the mounting plate 7 is installed on the inner wall of the fiber disc filter via lugs and pins. The two ends of the pin are rotatably mounted on corresponding lugs, and the mounting plate 7 is fixed to the middle of the pin. Directly hinged mounting plate 7 to the inner wall of the fiber disc filter can easily lead to disc misalignment, preventing the scraper 1 from making tight contact with the fiber disc 5. The lugs and pins limit unnecessary deflection of the mounting plate 7 while allowing relative rotation between the mounting plate 7 and the inner wall of the fiber disc filter. In this embodiment, the lugs are symmetrically welded and fixed to the inner wall of the fiber disc filter. The symmetrically arranged lugs have ear holes that match the pins, and the two ends of the pin are rotatably connected to the ear holes. The mounting plate 7 has pin holes, and the pin is fixed to the pin holes. The pin and lug structure is based on existing technology; more detailed structures are not described here.

[0043] The specific implementation process is as follows:

[0044] Turn on the corresponding backwashing device (backwashing pump and suction pipe) so that the clean water in the central cylinder 6 of the fiber disc filter tank flows in the opposite direction to impact the fiber disc 5, thereby rinsing the fiber disc 5, and causing the fiber disc 5 to rotate through the corresponding transmission mechanism (chain drive structure).

[0045] The control motor rotates in the opposite direction to release the pull rope 8, causing the scraper 1 to re-contact the fiber disc 5. Under the drive of the fiber disc 5, it flips downward to a horizontal state, achieving complete contact with the fiber disc 5. When both ends of the scraper 1 are attached to the preset position of the fiber disc 5, the pull rope 8 is fixed. The elastic scraper strip 4 of the scraper 1 is attached to the fiber disc 5 under the action of the filter tank water pressure. The scraper line 2 of the scraper 1 is attached to the fiber disc 5. The scraper 1 and the fiber disc 5 move relative to each other. The scraper line 2 and the elastic scraper strip 4 scrape off the sludge on the filter cloth of the fiber disc 5. The elastic baffle 3 bends under the action of the reverse flow of water to form a sludge inlet. The sludge enters the backwash chamber 11 through the slot and is then discharged through the corresponding pipe. After the filter cloth of the fiber disc 5 is cleaned, the pull rope 8 can be driven by the motor to retract the scraper 1 upward, causing the scraper 1 to move upward and detach from the filter cloth of the fiber disc 5, so as to reduce the wear on the disc filter cloth during filtration.

[0046] In this design, the elastic scraper 4 adheres to the fiber disc 5 under water pressure during backwashing and returns to its original position when backwashing is not required, without affecting the normal filtration movement of the fiber disc 5. The scraper line 2 is in contact with the fiber disc 5, having minimal impact on its rotation. This design allows for rapid sludge discharge, reducing its impact on the water in the filter tank, while maintaining the normal filtration movement of the fiber disc 5. The slotted design allows sludge from the outside of the scraper 1 to enter the backwash chamber 11, preventing it from contaminating the water in the filter tank. This avoids the problem in traditional methods where sludge cannot be promptly drawn into the backwash chamber 11 due to the obstruction of the scraper 1. The structure of the pull rope 8 and mounting plate 7 allows the scraper 1 to be positioned on the surface of the fiber disc 5 when cleaning is required, without affecting the normal filtration of the fiber disc 5.

[0047] The above descriptions are merely embodiments of this utility model, and common technical solutions and / or characteristics known in the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A scraper for a fiber disc filter, characterized in that, include: The filter comprises a scraper, scraper lines, a mounting plate, a connecting plate, and a pull rope. The scraper has a backwash chamber inside and an opening communicating with the backwash chamber. The open end of the scraper contacts the surface of the fiber disc, and the length of the opening matches the width of the ring formed by the fiber disc. The top of the scraper has a slot, the two ends of which are used to fix the scraper lines. The top of the scraper is in close contact with the fiber disc via the scraper lines. An elastic baffle is provided within the slot to close the slot; one side of the elastic baffle is fixed to the slot, and the other side is close to the scraper lines. The bottom of the scraper has an elastic scraper strip, which is in close contact with the fiber disc. One side of the elastic scraper strip is fixed to the scraper. The scraper is fixed to the mounting plate via a connecting plate. The mounting plate is hinged to the inner wall of the fiber disc filter at the end away from the fiber disc. The mounting plate is fixed to the inner wall of the fiber disc filter at the end near the fiber disc via a pull rope, which is located above the mounting plate.

2. The scraper for a fiber disc filter according to claim 1, characterized in that: Scrapers are provided on the outer end faces of the fiber turntables at both ends, and scrapers are symmetrically provided between the fiber turntables.

3. The scraper for a fiber disc filter according to claim 1, characterized in that: The mounting plate is installed on the inner wall of the fiber disc filter via lugs and pins. The two ends of the pin are rotatably mounted on the corresponding lugs, and the mounting plate is fixed on the pins.

4. The scraper for a fiber disc filter according to claim 1, characterized in that: The elastic baffle has a slit to facilitate its bending.

5. A scraper for a fiber disc filter according to claim 4, characterized in that: The elastic baffle is provided with a through hole that communicates with the gap.

6. A scraper for a fiber disc filter according to claim 5, characterized in that: The through holes and gaps are provided in a one-to-one correspondence, and the through holes are circular.

7. A scraper for a fiber disc filter according to claim 4, characterized in that: The gaps are evenly spaced on the elastic baffle.

8. A scraper for a fiber disc filter according to claim 1, characterized in that: The scraper is U-shaped or C-shaped.

9. A scraper for a fiber disc filter according to claim 1, characterized in that: The bottom end of the elastic scraper is below the bottom end of the scraper.

10. A scraper for a fiber disc filter according to claim 9, characterized in that: The elastic scraper is arc-shaped, and the opening of the elastic scraper faces the fiber turntable.

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