Modularized shallow sand filtering device

Abstract

The utility model provides a modularized shallow sand filtering device, which relates to the technical field of water treatment and comprises a shell, a three-way valve arranged at the upper end of the shell and a sealing box, the sealing box is fixed in the shell and close to the upper end, and hollow supports are mounted on the outer side of the sealing box at equal intervals. An annular gas conveying pipe communicating with the hollow support is installed on the outer side of the shell, and a gas pump communicating with the annular gas conveying pipe is installed on the outer side of the shell. According to the modularized shallow sand filtering device, in the back flushing process, the hollow shaft drives the first arc-shaped pipe and the second arc-shaped pipe to rotate, then filler in the shell is loosened, resistance during water back flushing is reduced, air is injected into the hollow shaft through the air pump, the annular air conveying pipe, the hollow support and the sealing box, and therefore the water back flushing effect is improved. Through the arrangement of the first arc-shaped pipe, the second arc-shaped pipe and the exhaust cap, air is injected into the filler, so that the backwash water is assisted to move upwards, impurities in the filler can be discharged along with bubbles, and the backwash effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of water treatment, in particular to a modular shallow sand filtering device. Background Art

[0002] Shallow media filter uses quartz sand as the filter medium. Under a certain pressure, it filters water with high turbidity through granular or non-granular quartz sand of a certain thickness, effectively intercepting and removing suspended matter, organic matter, colloidal particles, microorganisms, chlorine, odor and some heavy metal ions in the water, and ultimately achieving the effect of reducing water turbidity and purifying water quality. It is a high-efficiency filtering equipment.

[0003] Chinese patent publication number CN212594177U discloses a shallow sand filter with a bypass pressure reducing device. The device fully cooperates with a water distributor to evenly distribute water, achieve high filtration velocity and high efficiency. During backwashing, an internal circulation is formed without sand running away.

[0004] However, during backwashing, clean water is sprayed from bottom to top, and the flushing force of the water is bound to gradually weaken from bottom to top, which will result in the impurities adhering to the packing being unable to be effectively cleaned. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a modular shallow sand filtering device, which solves the problems raised by the above-mentioned background technology.

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: a modular shallow sand filtering device, comprising an outer shell, a three-way valve arranged at the upper end of the outer shell, and a sealing box, wherein the sealing box is fixed in the outer shell near the upper end, and hollow brackets are installed at equal intervals on the outside of the sealing box, an annular air pipe connected to the hollow bracket is installed on the outside of the outer shell, and an air pump connected to the annular air pipe is installed on the outside of the outer shell; a hollow shaft, wherein the hollow shaft is rotatably installed at the lower end of the sealing box, and the upper end of the hollow shaft extends to the inside of the sealing box and is provided with an opening, a porous plate is fixed on the outside of the hollow shaft near the position of the sealing box, a filler is provided in the outer shell below the porous plate, the lower end of the hollow shaft extends to the inside of the filler and is installed with a first arc tube, and the outer wall of the hollow shaft is located outside the first arc tube and a second arc tube is also provided, and exhaust caps are provided on both the first arc tube and the second arc tube.

[0007] As a further technical solution of the utility model, a motor is fixed on the outside of the shell, a driving shaft is installed on the output end of the motor, and a brush cylinder is provided on the outside of the driving shaft to abut against the upper surface of the porous plate.

[0008] As a further technical solution of the utility model, one end of the drive shaft extends into the sealing box and is fixed with a first bevel gear, and the outer side of the hollow shaft is located inside the sealing box and is fixedly sleeved with a second bevel gear meshing with the first bevel gear.

[0009] As a further technical solution of the utility model, a track is provided on the inner wall of the shell, and the outer edge of the porous plate is slidably connected to the track.

[0010] As a further technical solution of the utility model, a water distributor is fixed at the top of the shell, the water distributor is connected to the outlet of the three-way valve, the inlet of the three-way valve is installed with a raw water pipe, and the bypass port of the three-way valve is provided with a sewage pipe.

[0011] As a further technical solution of the utility model, a water collector is installed at the bottom of the shell, the water collector is rotatably connected to the hollow shaft, and water collecting caps are evenly arranged on the water collector. The lower end of the water collector passes through the shell and is installed with a water outlet pipe.

[0012] The utility model provides a modular shallow sand filtering device, which has the following beneficial effects compared with the prior art:

[0013] A modular shallow sand filtering device of the present invention drives the first arc tube and the second arc tube to rotate through the hollow shaft during the backwashing process, thereby loosening the filler inside the outer shell and reducing the resistance during water backwashing. Air is injected into the hollow shaft through the air pump, the annular air pipe, the hollow bracket and the sealing box. Air is injected into the filler through the first arc tube, the second arc tube and the exhaust cap, thereby assisting the recoil water to move upward and allowing impurities in the filler to be discharged along with the bubbles, thereby improving the backwashing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a modular shallow sand filtration device;

[0015] Figure 2 It is a schematic diagram of the internal structure of a modular shallow sand filtration device;

[0016] Figure 3 It is a schematic diagram of the installation structure of a brush cylinder in a modular shallow sand filtering device;

[0017] Figure 4 This is a schematic diagram of the internal structure of a sealing box in a modular shallow sand filtration device.

[0018] In the figure: 1. outer shell; 2. water outlet pipe; 3. raw water pipe; 4. sewage pipe; 5. three-way valve; 6. annular air pipe; 7. air pump; 8. motor; 9. water collector; 10. water collecting cap; 11. water distributor; 12. hollow bracket; 13. sealing box; 14. porous plate; 15. hollow shaft; 16. first arc tube; 17. second arc tube; 18. exhaust cap; 19. drive shaft; 20. brush cylinder; 21. first bevel gear; 22. second bevel gear. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 The utility model provides a technical solution for a modular shallow sand filtering device: a modular shallow sand filtering device, comprising a housing 1, a three-way valve 5 arranged at the upper end of the housing 1, and a sealing box 13, the sealing box 13 is fixed in the housing 1 near the upper end, and hollow brackets 12 are installed at equal intervals on the outside of the sealing box 13, an annular air pipe 6 connected to the hollow bracket 12 is installed on the outside of the housing 1, and an air pump 7 connected to the annular air pipe 6 is installed on the outside of the housing 1;

[0021] In addition, the present embodiment also includes a hollow shaft 15, which is rotatably mounted on the lower end of the sealing box 13, and the upper end of the hollow shaft 15 extends to the inside of the sealing box 13 and is provided with an opening, a porous plate 14 is fixed to the outer side of the hollow shaft 15 near the sealing box 13, a filler is provided below the porous plate 14 in the outer shell 1, the lower end of the hollow shaft 15 extends to the inside of the filler and is installed with a first arc tube 16, and the outer wall of the hollow shaft 15 is located outside the first arc tube 16 and is also provided with a second arc tube 17, and exhaust caps 18 are provided on the first arc tube 16 and the second arc tube 17.

[0022] In this embodiment, the first arc tube 16 and the second arc tube 17 are rotated by the hollow shaft 15, so that the packing is loosened and the resistance during water backwashing is reduced. Air is input into the annular air supply pipe 6 by the air pump 7, and the air is input into the sealed box 13 under the setting of the hollow bracket 12. The air inside the sealed box 13 is further input into the first arc tube 16 and the second arc tube 17 by the hollow shaft 15, and is further discharged by the exhaust cap 18, so that air can be injected into the packing to help the backwash water to move upward, and impurities in the packing can be discharged along with the bubbles, thereby improving the backwashing effect.

[0023] like Figure 1 and Figure 3 As shown, in this embodiment, a motor 8 is fixed on the outside of the central control housing 1, a drive shaft 19 is installed on the output end of the motor 8, and a brush cylinder 20 is provided on the outside of the drive shaft 19 to abut against the upper surface of the porous plate 14. Through the cooperation between the brush cylinder 20 and the porous plate 14, impurities on the surface of the porous plate 14 are cleaned.

[0024] like Figure 3 and Figure 4 As shown, in order to further realize the driving of the hollow shaft 15, one end of the driving shaft 19 extends to the inside of the sealing box 13 and is fixed with a first bevel gear 21, and the outer side of the hollow shaft 15 is located inside the sealing box 13 and is fixedly sleeved with a second bevel gear 22 that meshes with the first bevel gear 21. The first bevel gear 21 rotates under the drive of the driving shaft 19, and the hollow shaft 15 rotates through the meshing of the first bevel gear 21 and the second bevel gear 22.

[0025] like Figure 2 As shown, in order to facilitate the rotation of the porous plate 14, a track is provided on the inner wall of the shell 1, and the outer edge of the porous plate 14 is slidably connected to the track.

[0026] like Figure 1 and Figure 2 As shown, a water distributor 11 is fixed at the top of the shell 1, and the water distributor 11 is connected to the outlet of the three-way valve 5. The inlet of the three-way valve 5 is installed with a raw water pipe 3, and the bypass port of the three-way valve 5 is provided with a sewage pipe 4. The setting of the three-way valve 5 can realize the output of impurities.

[0027] like Figure 2 As shown, in order to achieve the discharge of purified water, a water collector 9 is installed at the bottom of the outer shell 1. The water collector 9 is rotatably connected to the hollow shaft 15, and water collecting caps 10 are evenly arranged on the water collector 9. The lower end of the water collector 9 passes through the outer shell 1 and is installed with a water outlet pipe 2 to facilitate the output of purified water.

[0028] The working principle of the utility model is as follows: when in use, the sewage pipe 4 is closed through the three-way valve 5, and the raw water is extended from the raw water pipe 3 to the inside of the shell 1, and the raw water is filtered through the porous plate 14 and the filler. Under the setting of the water collecting cap 10 and the water collector 9, the filtered water flows to the inside of the water outlet pipe 2, so as to discharge the clean water. When backwashing, the raw water pipe 3 is closed through the three-way valve 5, and the clean water is input to the bottom of the shell 1, and the motor 8 is started to rotate the driving shaft 19, thereby driving the brush cylinder 20 to rotate, and the first bevel gear 21 is rotated under the drive of the driving shaft 19, and the hollow shaft 15 is rotated by the meshing of the first bevel gear 21 and the second bevel gear 22, and the porous plate 14 is further rotated. Rotation, through the cooperation between the porous plate 14 and the brush tube 20, the filler can be prevented from clogging the porous plate 14. In addition, the first arc tube 16 and the second arc tube 17 are rotated by the hollow shaft 15, so that the filler is loosened and the resistance during water recoil is reduced. Air is input into the annular air pipe 6 through the air pump 7, and the air is input into the sealed box 13 under the setting of the hollow bracket 12. The air inside the sealed box 13 is further input into the first arc tube 16 and the second arc tube 17 by the hollow shaft 15, and further discharged by the exhaust cap 18, so that air can be injected into the filler to help the recoil water to go up, and impurities in the filler can be discharged along with the bubbles, thereby improving the backwashing effect.

[0029] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A modular shallow sand filtering device, comprising a housing (1), a three-way valve (5) arranged at the upper end of the housing (1), characterized in that: Also includes: A sealed box (13), the sealed box (13) being fixed inside the outer shell (1) near the upper end, and hollow brackets (12) being installed at equal intervals outside the sealed box (13), an annular air delivery pipe (6) being installed outside the outer shell (1) and being connected to the hollow brackets (12), and an air pump (7) being installed outside the outer shell (1) and being connected to the annular air delivery pipe (6); A hollow shaft (15) is rotatably mounted on the lower end of the sealing box (13), and the upper end of the hollow shaft (15) extends into the interior of the sealing box (13) and is provided with an opening, a porous plate (14) is fixed to the outer side of the hollow shaft (15) near the sealing box (13), a filler is provided below the porous plate (14) in the housing (1), the lower end of the hollow shaft (15) extends into the interior of the filler and is provided with a first arc tube (16), and the outer wall of the hollow shaft (15) is located outside the first arc tube (16) and is further provided with a second arc tube (17), and exhaust caps (18) are provided on both the first arc tube (16) and the second arc tube (17).

2. A modular shallow sand filtration device according to claim 1, characterized in that: A motor (8) is fixed on the outside of the housing (1), a drive shaft (19) is installed on the output end of the motor (8), and a brush cylinder (20) is provided on the outside of the drive shaft (19) to abut against the upper surface of the porous plate (14).

3. A modular shallow sand filtration device according to claim 2, characterized in that: One end of the driving shaft (19) extends into the interior of the sealing box (13) and is fixed with a first bevel gear (21); the outer side of the hollow shaft (15) is located inside the sealing box (13) and is fixedly sleeved with a second bevel gear (22) meshing with the first bevel gear (21).

4. A modular shallow sand filtration device according to claim 3, characterized in that: The inner wall of the outer shell (1) is provided with a track, and the outer edge of the porous plate (14) is slidably connected to the track.

5. A modular shallow sand filtration device according to claim 4, characterized in that: A water distributor (11) is fixed at the top end of the housing (1), the water distributor (11) is connected to the outlet of the three-way valve (5), a raw water pipe (3) is installed at the inlet of the three-way valve (5), and a sewage pipe (4) is provided at the bypass port of the three-way valve (5).

6. A modular shallow sand filtration device according to any one of claims 1 to 5, characterized in that: A water collector (9) is installed at the bottom of the outer shell (1), the water collector (9) is rotatably connected to the hollow shaft (15), and water collecting caps (10) are evenly arranged on the water collector (9). The lower end of the water collector (9) passes through the outer shell (1) and is installed with a water outlet pipe (2).

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