Continuous backwashing sand filtering device

Abstract

The utility model discloses a continuous backwashing sand filtration device which comprises a sand filtration tank, a liquid inlet pipeline is arranged on one side of the sand filtration tank, a liquid outlet pipeline is arranged on the other side of the sand filtration tank, a liquid separation seat is arranged at the end, extending into the sand filtration tank, of the liquid inlet pipeline, a sand washing mechanism is arranged in the sand filtration tank, and the sand washing mechanism comprises a sand washing assembly and a stirring assembly. The sand washing assembly is arranged in the sand filter tank and comprises a sand washing box fixedly arranged at the top of the sand filter tank; the sand suction pipe is fixedly arranged in the sand washing box, and the liquid inlet pipeline and the liquid separation seat are both arranged on the outer side of the bottom of the sand suction pipe; the sand outlet pipe is fixedly arranged at the bottom of the sand washing box, the stirring assembly is arranged in the sand washing assembly and used for stirring the interior of the sand washing box and the bottom of the sand suction pipe, pollutants and water are discharged from the liquid outlet holes through rotation of the filter box, and centrifugal force generated during rotation can also prevent gravel from hardening; and the stirring rod is driven by the rotating rod to rotate to stir the bottom of the sand suction pipe.

Description

Technical Field

[0001] The present application relates to the field of sand filters, and in particular to a continuous backwashing sand filter device. Background Art

[0002] Sand filter is a kind of high-efficiency filtering equipment which uses filtering medium to remove suspended solids, microorganisms, and other fine particles in water, ultimately achieving the effect of reducing water turbidity and purifying water quality. Continuous backwashing sand filter can purify water and backwash sand at the same time, and the filtering process can be continuous without stopping. It has a high degree of automation and is widely used in sewage treatment sites such as coal and municipal.

[0003] However, in the process of implementing relevant technical solutions, at least the following technical problems were found: Continuous backwashing of sand filters generally uses an air compression lifting device to suck the sand and gravel at the bottom of the sand filter from the sand suction pipe into the sand washer for cleaning. After the sand and gravel accumulate at the bottom of the sand filter, they will become compacted, making it impossible for the sand suction pipe to suck in the sand and gravel. Utility Model Content

[0004] The present application solves the problem of easy clogging during sand washing in the prior art by providing a continuous backwashing sand filter device, and achieves the effect of preventing clogging of the sand suction and sand washing positions.

[0005] The present application provides a continuous backwashing sand filter device, comprising a sand filter tank, wherein a liquid inlet pipe is arranged on one side of the sand filter tank, a liquid outlet pipe is arranged on the other side of the sand filter tank, a liquid separator seat is arranged on one end of the liquid inlet pipe extending into the interior of the sand filter tank, a sand washing mechanism is arranged inside the sand filter tank, the sand washing mechanism comprises a sand washing assembly and a stirring assembly, the sand washing assembly is arranged inside the sand filter tank, the sand washing assembly comprises: a sand washing box, fixedly arranged on the top of the sand filter tank; a sand suction pipe, fixedly arranged inside the sand washing box, and the liquid inlet pipe and the liquid separator seat are both arranged on the outside of the bottom of the sand suction pipe; a sand outlet pipe, fixedly arranged at the bottom of the sand washing box, the stirring assembly is arranged inside the sand washing assembly, and the stirring assembly is used to stir the inside of the sand washing box and the bottom of the sand suction pipe.

[0006] Furthermore, the stirring assembly includes: a driving motor, fixedly installed on the top of the sand filter tank; a filter box, rotatably connected to the inside of the sand washing box, and the output shaft of the driving motor is fixedly connected to the filter box; a plurality of liquid outlet holes, opened on the outside of the filter box, and the plurality of liquid outlet holes are equidistantly arranged in a ring on the outside of the filter box.

[0007] Furthermore, the stirring assembly also includes: a rotating rod, which is fixedly arranged inside the filter box, and one end of the sand suction pipe passes through the sand suction pipe and extends into the bottom of the sand filter tank; a stirring rod, which is fixedly arranged on the outside of the bottom of the rotating rod, and the stirring rod rotates at the bottom of the sand suction pipe.

[0008] Furthermore, both ends of the stirring rod are provided with fixed seats, and a scraper is fixedly provided on one side of the two fixed seats close to the inner wall of the sand filter tank, and the scraper is in contact with and connected to the inner wall of the sand filter tank.

[0009] Furthermore, a sewage pipe is fixedly arranged on the outside of the sand washing box, and the sewage pipe extends out of the sand filter tank. The bottom of the sand filter tank is provided with a compressed air lifting component for lifting the sand and gravel at the bottom of the sand filter tank from the sand suction pipe into the inside of the filter box.

[0010] The technical solution provided by this application has at least the following technical effects or advantages:

[0011] The filter box rotates to discharge pollutants and water from the liquid outlet. The centrifugal force during rotation can also prevent sand and gravel from compacting in the filter box. The rotating rod drives the stirring rod and scraper to rotate, stirring the bottom of the sand suction pipe to prevent blockage during sand suction and prevent sand and pollutants from adhering to the inner wall of the sand filter tank, affecting the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the sand filter in the embodiment of the present application;

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the sand filter in the embodiment of the present application;

[0014] Figure 3 This is a structural schematic diagram of the sand washing mechanism in the embodiment of the present application;

[0015] Figure 4 This is a schematic diagram of the structure of the stirring assembly in the embodiment of the present application;

[0016] In the figure: 10, sand filter tank; 20, liquid inlet pipe; 30, liquid outlet pipe; 40, sand washing mechanism; 50, liquid separation seat; 41, sand washing assembly; 42, stirring assembly; 43, sewage pipe; 44, compressed air lifting assembly; 411, sand washing box; 412, sand suction pipe; 413, sand outlet pipe; 421, rotating rod; 422, stirring rod; 423, fixed seat; 424, scraper; 425, driving motor; 426, filter box; 427, liquid outlet. DETAILED DESCRIPTION

[0017] The embodiment of the present application discloses a continuous backwashing sand filter device, which prevents sand and gravel from getting stuck in the filter box 426 through the rotation of the filter box 426, separates sand and gravel from pollutants, and completes the sand washing work. The filter box 426 drives the rotation of the rotating rod 421, the stirring rod 422 and the scraper 424 to clean and stir the inner wall of the sand filter tank 10 and the bottom of the sand suction pipe 412 to prevent sand and gravel from getting stuck at the bottom of the sand filter tank 10.

[0018] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Please refer to Figure 1 , Figure 2 and Figure 3 The present embodiment provides a continuous backwashing sand filter device, including a sand filter tank 10, a liquid inlet pipe 20 is provided on one side of the sand filter tank 10, a liquid outlet pipe 30 is provided on the other side of the sand filter tank 10, an overflow valve is provided on the side of the liquid outlet pipe 30 extending into the sand filter tank 10, a liquid separator 50 is provided on one end of the liquid inlet pipe 20 extending into the interior of the sand filter tank 10, a sand bed composed of sand and gravel is provided in the interior of the sand filter tank 10, the liquid separator 50 is provided inside the sand and gravel, a sand washing mechanism 40 is provided inside the sand filter tank 10, the sand washing mechanism 40 includes a sand washing component 41, a stirring component 42, a sewage pipe 43, and a compressed air lifting component 44, the sand washing component 41 is provided inside the sand filter tank 10, the sand washing component 41 includes a sand washing box 411, a sand suction pipe 412, and a sand outlet pipe 413, the sand washing box 411 is fixedly provided on the top of the sand filter tank 10, and the sand suction pipe 412 is fixedly provided on the sand washing box 41 1, and the liquid inlet pipe 20 and the liquid separator seat 50 are both arranged on the outside of the bottom of the sand suction pipe 412, the sand outlet pipe 413 is fixedly arranged at the bottom of the sand washing box 411, and a sewage pipe 43 is fixedly arranged on the outside of the sand washing box 411, and the sewage pipe 43 extends out of the sand filter tank 10. The bottom of the sand filter tank 10 is provided with a compressed air lifting component 44 for lifting the sand and gravel at the bottom of the sand filter tank 10 from the sand suction pipe 412 into the sand washing box 411. The liquid inlet pipe 20 passes the sewage into the liquid separator seat 50 inside the sand filter tank 10, and the water flows up and overflows from the liquid outlet pipe 30 after being filtered through the sand bed, so as to clean the sewage. The compressed air lifting component 44 at the bottom of the sand filter tank 10 sprays compressed air to make the sand and gravel at the bottom of the sand filter tank 10 sucked into the sand washing box 411 from the sand suction pipe 412, and the cleaned sand and gravel fall from the sand outlet pipe 413 onto the sand bed, and the sewage is discharged from the sewage pipe 43.

[0020] Please refer to Figure 1-Figure 4The stirring assembly 42 is arranged inside the sand washing assembly 41, and the stirring assembly 42 is used to stir the inside of the sand washing box 411 and the bottom of the sand suction pipe 412. The stirring assembly 42 includes a rotating rod 421, a stirring rod 422, a fixing seat 423, a scraper 424, a driving motor 425, a filter box 426, and a liquid outlet 427. The driving motor 425 is fixedly installed on the top of the sand filter tank 10, and the filter box 426 is rotatably connected to the inside of the sand washing box 411, and the output shaft of the driving motor 425 is fixedly connected to the filter box 426. The top of the sand suction pipe 412 is located inside the filter box 426, and the sand outlet pipe 413 extends into the bottom of the filter box 426. The filter box 426 is in the sand outlet pipe 413. The filter box 426 rotates outside, and multiple liquid outlet holes 427 are opened on the outside of the filter box 426, and the multiple liquid outlet holes 427 are equidistantly arranged in a ring outside the filter box 426. The filter box 426 inside the sand washing box 411 rotates through the rotation of the driving motor 425, so that the sand and gravel sucked from the sand suction pipe 412 rotate in the filter box 426, and the centrifugal force discharges the pollutants and water on the sand and gravel from the liquid outlet holes 427 into the sand washing box 411, and then discharges the sand filter tank 10 from the sewage pipe 43. The cleaned sand and gravel fall from the sand outlet pipe 413 onto the sand bed, completing the cleaning of the sand and gravel. The centrifugal force generated by the rotation of the filter box 426 can also prevent the sand and gravel from being compacted and blocked during sand washing.

[0021] Please refer to Figure 1-Figure 4 The rotating rod 421 is fixedly arranged inside the filter box 426, and one end of the sand suction pipe 412 passes through the sand suction pipe 412 and extends into the bottom of the sand filter tank 10. The stirring rod 422 is fixedly arranged on the outside of the bottom of the rotating rod 421, and the stirring rod 422 rotates at the bottom of the sand suction pipe 412. Two fixed seats 423 are respectively arranged at both ends of the stirring rod 422. The scraper 424 is fixedly arranged on one side of the two fixed seats 423 close to the inner wall of the sand filter tank 10. The scraper 424 is in contact with the inner wall of the sand filter tank 10, and the rotation of the filter box 426 drives the rotation. The rod 421 rotates inside the sand suction pipe 412, so that the inside of the sand suction pipe 412 will not be blocked. The rotation of the sand suction pipe 412 drives the stirring rod 422, the fixing seat 423 and the scraper 424 to rotate accordingly. The rotation of the stirring rod 422 stirs the entrance of the sand suction pipe 412 to prevent sand and gravel from being compacted and causing blockage at the entrance of the sand suction pipe 412. The stirring rod 422 drives the rotation of the fixing seat 423 and the scraper 424 to clean the inner wall of the bottom of the sand filter tank 10 to prevent sand and gravel and pollutants from adhering to the inner wall of the sand filter tank 10, thereby affecting the cleaning efficiency.

[0022] This application can explain its functional principle through the following operation methods:

[0023] When in use, sewage is passed from the liquid inlet pipe 20 into the liquid separation seat 50 in the sand filter tank 10, and the sewage flows out from the liquid separation seat 50 onto the sand bed, and after being filtered by the sand and gravel on the sand bed, it overflows from the overflow valve into the liquid outlet pipe 30 for discharge, and the compressed air lifting component 44 at the bottom of the sand filter tank 10 sprays compressed air, so that the sand and gravel can be sucked into the sand washing box 411 from the sand suction pipe 412 at the bottom of the sand filter tank 10, and the driving motor 425 at the top of the sand filter tank 10 is started, so that the output shaft of the driving motor 425 drives the filter box 426 inside the sand washing box 411 to rotate, and the sand and gravel sucked into the sand suction pipe 412 is subjected to the centrifugal force of the rotation of the filter box 426, and the pollutants attached to the surface of the sand and gravel are discharged from the multiple liquid outlet holes 427 into the sand washing box 411 and the filter box 411 along with the water flow. The sand and gravel cannot pass through the liquid outlet 427 and fall from the sand outlet pipe 413 at the bottom of the filter box 426 to the sand bed inside the sand filter tank 10, thereby completing the cleaning of the sand and gravel. The rotation of the filter box 426 will also drive the rotating rod 421 fixedly connected thereto to rotate inside the sand suction pipe 412 to prevent the sand and gravel from being blocked inside the sand suction pipe 412. The rotation of the rotating rod 421 can drive the stirring rod 422 to rotate at the entrance of the sand suction pipe 412 to stir the entrance of the sand suction pipe 412. The rotation of the stirring rod 422 causes the fixed seat 423 and the scraper 424 to rotate accordingly. The scraper 424 cleans the sand and gravel and pollutants attached to the inner wall at the bottom of the sand filter tank 10, thereby preventing blockage and improving the cleaning efficiency.

[0024] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0025] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A continuous backwashing sand filter device, comprising a sand filter tank (10), characterized in that: A liquid inlet pipe (20) is provided on one side of the sand filter tank (10), and a liquid outlet pipe (30) is provided on the other side of the sand filter tank (10); a liquid separator (50) is provided on one end of the liquid inlet pipe (20) extending into the interior of the sand filter tank (10); a sand washing mechanism (40) is provided inside the sand filter tank (10); the sand washing mechanism (40) comprises a sand washing component (41) and a stirring component (42); the sand washing component (41) is arranged inside the sand filter tank (10), and the sand washing component (41) comprises: A sand washing box (411) is fixedly arranged on the top of the sand filter tank (10); A sand suction pipe (412) is fixedly arranged inside the sand washing box (411), and the liquid inlet pipe (20) and the liquid separation seat (50) are both arranged on the outside of the bottom of the sand suction pipe (412); The sand outlet pipe (413) is fixedly arranged at the bottom of the sand washing box (411). The stirring component (42) is arranged inside the sand washing component (41), and the stirring component (42) is used to stir the inside of the sand washing box (411) and the bottom of the sand suction pipe (412).

2. A continuous backwashing sand filter device as claimed in claim 1, characterized in that: The stirring assembly (42) comprises: A driving motor (425) fixedly mounted on the top of the sand filter tank (10); A filter box (426) is rotatably connected to the interior of the sand washing box (411), and an output shaft of the drive motor (425) is fixedly connected to the filter box (426); A plurality of liquid outlet holes (427) are provided on the outside of the filter box (426), and the plurality of liquid outlet holes (427) are arranged in a circular pattern at equal intervals on the outside of the filter box (426).

3. A continuous backwashing sand filter device as claimed in claim 2, characterized in that: The stirring assembly (42) further comprises: A rotating rod (421) is fixedly arranged inside the filter box (426), and one end of the sand suction pipe (412) passes through the sand suction pipe (412) and extends into the bottom of the sand filter tank (10); The stirring rod (422) is fixedly arranged on the outer side of the bottom of the rotating rod (421), and the stirring rod (422) rotates at the bottom of the sand suction pipe (412).

4. A continuous backwashing sand filter device as claimed in claim 3, characterized in that: Both ends of the stirring rod (422) are provided with a fixing seat (423), and a scraper (424) is fixedly provided on one side of the two fixing seats (423) close to the inner wall of the sand filter tank (10), and the scraper (424) is in contact with and connected to the inner wall of the sand filter tank (10).

5. A continuous backwashing sand filter device as claimed in claim 2, characterized in that: A sewage pipe (43) is fixedly arranged on the outside of the sand washing box (411), and the sewage pipe (43) extends out of the sand filter tank (10). A compressed air lifting component (44) is arranged at the bottom of the sand filter tank (10) for lifting sand and gravel at the bottom of the sand filter tank (10) from the sand suction pipe (412) into the interior of the filter box (426).

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