Multi-core self-cleaning water filter

Abstract

The utility model relates to a multi-core self-cleaning water filter which comprises a shell, a water inlet pipe, an end cover and a water inlet backwashing seat, the end cover is fixed at one end of the shell, and the water inlet backwashing seat is fixed at the other end of the shell; at least one water outlet is formed in the shell; the water inlet pipe is arranged in the shell, one end of the water inlet pipe penetrates through the end cover and extends outwards, and the other end is inserted into an inner hole of the water inlet backwashing seat; a plurality of filter elements are arranged between the end cover and the water inlet backwashing seat; the plurality of filter elements are uniformly distributed on one to three concentric distribution circles; a plurality of radial holes are uniformly formed in the inner wall of the inner hole of the water inlet backwashing seat along the circumferential direction. According to the utility model, the water inlet pipe is arranged in the shell, the size of the filter is reduced, a plurality of filter elements are arranged and distributed on one to three concentric distribution circles, the number of the filter elements can be more, a plurality of radial holes are radially distributed on the inner cylindrical surface of the water inlet backwashing seat, and one filter element corresponds to one radial hole, so that the backwashing intensity is high when backwashing is carried out one by one; the self-cleaning performance is good.

Description

Technical Field

[0001] This utility model belongs to the technical field of water purification, industrial and domestic circulating water, wastewater treatment and reuse, and specifically relates to a multi-core self-cleaning water filter. Background Technology

[0002] Water filters are widely used in the fields of water purification, industrial and domestic circulating water, wastewater treatment and reuse. There are many types of water filters with various structures, and many types and models of self-cleaning water filters. However, there are relatively few water filters that can be thoroughly self-cleaning and do not require replacement of filter elements for a long time.

[0003] A multi-cartridge self-cleaning filter is a precision device that uses a filter screen to directly intercept impurities in water, removing suspended solids and particulate matter. The general working principle of a multi-cartridge self-cleaning filter is as follows: Raw water enters the turbid water zone of the filter through the inlet, and flows upwards through the water distribution holes on the partition plate into the inner cavity of the filter element. Impurities larger than the filter element's gaps are trapped, while purified water passes through the gaps into the purified water zone. All the liquid filtered by the filter element converges in the purified water zone and finally flows out from the outlet. During the filtration process, impurities gradually accumulate inside the filter element, creating a pressure difference between the inside and outside. When the pressure difference reaches a preset value, the drain valve opens, releasing the pressure and discharging the water. Simultaneously, the drive unit drives the backwash arm to move, backwashing the filter element. During backwashing, the inner cavity of the filter element is opened to the atmosphere (gauge pressure is 0) by the pressure relief valve, turning the filtered purified water on the outside of the filter element into backwash water. Under the action of the large pressure difference, the backwash water rapidly flushes from the outside of the filter element to the inside, creating a significant scouring and cleaning effect on the filter element's gaps.

[0004] Typically, the self-cleaning and backwashing ports of existing multi-cartridge self-cleaning filters are distributed on the end face of the filter cartridge, resulting in a large size of this type of filter. It can generally only be installed vertically, making it ineffective in places with limited installation space.

[0005] In industries such as shipbuilding, water filtration equipment is required to be small in size, lightweight, and powerful in cleaning. In the special environment of underground coal mines, there are great challenges in performing water filtration tasks. Existing multi-cartridge self-cleaning filters on the market are often too large to meet the needs of such confined spaces and therefore cannot be effectively used. Utility Model Content

[0006] The purpose of this utility model is to provide a multi-core self-cleaning water filter with a small size, good self-cleaning performance, suitable for confined spaces, and superior economic and technical advantages.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A multi-core self-cleaning water filter includes a housing, an inlet pipe, an end cap, and an inlet backwash base.

[0009] One end of the housing is fixed with an end cap, and the other end is fixed with a water inlet backwash base. The housing has at least one water outlet. The water inlet backwash base is annular. The water inlet pipe is disposed inside the housing, with its axis coaxial or parallel to the housing axis. One end of the water inlet pipe extends outward through the end cap, and the other end is inserted into the inner hole of the water inlet backwash base. A partition is provided between the outer wall of the water inlet pipe and the end of the inner hole of the water inlet backwash base near the end cap.

[0010] A plurality of filter elements are provided between the end cap and the inlet backwash seat, wherein the filter elements are annular cylindrical and the axis of the filter elements is parallel to the housing; the end cap has a first filter element mounting hole corresponding to the plurality of filter elements; the inlet backwash seat has a second filter element mounting hole corresponding to the plurality of filter elements on the side near the end cap; each filter element is inserted into the corresponding first filter element mounting hole on the side near the end cap and into the corresponding second filter element mounting hole on the side near the inlet backwash seat;

[0011] The inner wall of the water inlet backwash seat is uniformly provided with a plurality of radial holes along the circumferential direction, which correspond to the mounting holes of the second filter element; each mounting hole of the second filter element is connected to the corresponding radial hole.

[0012] Preferably, a plurality of the filter elements are evenly distributed on one to three concentric distribution circles.

[0013] Preferably, the device further includes a backwashing rotary suction port and a drain seat housing. The backwashing rotary suction port has an L-shaped structure with corresponding L-shaped channels inside to form a drain channel. The backwashing rotary suction port includes a rotating arm and a rotating shaft. The rotating arm is fixed to the wall of the rotating shaft. The drain seat housing is fixed to the side of the inlet backwashing seat away from the housing. The rotating arm is disposed in the inner hole of the inlet backwashing seat, and a backwashing suction port is provided at the end of the rotating arm away from the rotating shaft. The backwashing suction port is connected to the drain channel and corresponds to the radial hole. The rotating shaft extends out of the inlet backwashing seat and is inserted into the drain seat housing. The rotating shaft inside the drain seat housing has several drain holes. The drain holes are connected to the drain channel. The bottom of the drain seat housing has a drain pipe corresponding to the drain holes. A valve is installed on the drain pipe.

[0014] Preferably, the orifice of the radial hole has a rectangular cross-section, and the orifice of the backwash suction port corresponds to the radial hole.

[0015] Preferably, the end face of the backwash suction port is arc-shaped and has a clearance fit with the inner hole.

[0016] Preferably, it further includes a drive device, which is fixed on the side of the sewage seat housing away from the housing; the drive device drives the rotating shaft to rotate.

[0017] Preferably, each of the first filter element mounting holes has a filter element fixing seat at the end away from the end cover; the end of the filter element near the end cover passes through the first filter element mounting hole and is inserted into the filter element fixing seat; a filter element plug is connected to the side of the filter element fixing seat away from the end cover.

[0018] This invention reduces the size of the filter by placing the water inlet pipe inside the housing, and installs multiple filter elements, distributing them in one to three concentric circles. This allows for a larger number of filter elements, greater cleaning intensity per filter element, and a smaller overall equipment size.

[0019] This invention incorporates an inlet pipe within the housing, which simultaneously increases the strength of the filter housing. As a result, the overall equipment requires less material, is smaller in size, and has lower manufacturing costs for the same pressure rating and flow rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall external structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the shell.

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4 This is a cross-sectional view of the inlet backwash seat;

[0024] Figure 5 This is a cross-sectional view of the backwash rotary suction port component;

[0025] Figure 6 This is a cross-sectional view of the backwash suction port.

[0026] Figure 7 This is a cross-sectional view of the filter element distribution. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-7 As shown, this utility model discloses a multi-core self-cleaning water filter, comprising a housing 1, an inlet pipe 2, an end cap 3, and an inlet backwash base 4.

[0029] One end of the housing 1 is welded and fixed with an end cap 3, and the other end is welded and fixed with a water inlet backwash seat 4; at least one water outlet 5 is welded and fixed on the housing 1 to prevent the filter element 3 in the upper part of the housing 1 from not having filtered water flowing in. At the same time, the inner wall of the outlet 5 is polished to reduce water flow resistance and ensure smooth water flow. An external welded flange is used for connection.

[0030] The water inlet backwash base 4 is annular; the water inlet pipe 2 is installed inside the housing 1, and the axis of the water inlet pipe 2 is coaxial or parallel to the axis of the housing 1. One end of the water inlet pipe 2 extends outward through the end cover 3, and the other end is inserted into the inner hole 402 of the water inlet backwash base 4; a partition plate 404 is provided between the outer wall of the water inlet pipe 2 and the end of the inner hole 402 of the water inlet backwash base 4 near the end cover 3, wherein the water inlet pipe 2 is inserted into the inner hole of the partition plate 404 and welded to the partition plate 404. The partition plate 404 can be integrally formed with the water inlet backwash base 4 or welded inside the water inlet backwash base 4. Raw water is introduced into the water inlet pipe 2 and enters the inner hole 402 of the water inlet backwash base 4 through the water inlet pipe 2. The partition plate 404 separates the clean water in the housing and the raw water in the inner hole 402 of the water inlet backwash base 4.

[0031] A plurality of filter elements 6 are provided between the end cap 3 and the water inlet backwash seat 4, wherein the filter elements are annular cylindrical and the axis of the filter elements is parallel to the housing; the plurality of filter elements 6 are evenly distributed on one to three concentric distribution circles, the center of the distribution circles being on the axis of the housing 1. In this embodiment, as shown... Figure 7 As shown, several filter elements 6 are evenly and alternately distributed on two concentric distribution circles, which makes it easier to install a larger number of filter elements 6.

[0032] The end cap 3 has first filter element mounting holes 301 corresponding to a plurality of filter elements 6; the water inlet backwash seat 4 has second filter element mounting holes 401 corresponding to a plurality of filter elements 6 on the side near the end cap 3; the plurality of filter elements 6 are evenly distributed on one to three concentric distribution circles, the centers of the distribution circles being on the axis of the housing 1. In this embodiment, as shown... Figure 7 As shown, several filter elements 6 are evenly and alternately distributed on two concentric distribution circles, which makes it easier to install a larger number of filter elements 6.

[0033] Each of the filter elements 6 is inserted into the corresponding first filter element mounting hole 301 on the side near the end cap 3, and is inserted into the corresponding second filter element mounting hole 401 on the side near the water inlet backwash seat 4;

[0034] The inner wall of the inner hole 402 of the water inlet backwash seat 4 is uniformly provided with a plurality of radial holes 403 corresponding to the second filter element mounting holes 401 along the circumferential direction. The radial holes 403 can be elongated holes with their long sides parallel to the axial direction of the inner hole 402 of the water inlet backwash seat 4, so as to facilitate the passage of more flow. Each second filter element mounting hole 401 is connected to the corresponding radial hole 403. After the raw water in the inner hole 402 of the water inlet backwash seat 4 enters the radial holes 403, it enters the second filter element mounting holes 401 and the filter element 6. After the filter element 6 filters the raw water, the clean water passes through the filter element 3 in the inner cavity of the housing 1 and is discharged through the outlet 13. The outlet 13 is located above the housing 1 to prevent the filter element 3 above the housing 1 from having no filtered water flowing in.

[0035] It also includes a backwashing rotary suction port 8 and a drain seat housing 9. The backwashing rotary suction port 8 has an L-shaped structure with corresponding L-shaped channels inside to form a drain channel 801. The backwashing rotary suction port 8 includes a rotating arm 802 and a rotating shaft 804. The rotating arm 802 is fixed to the wall of the rotating shaft 804. The rotating shaft 804 is provided with shaft plugs 806 and 807 at one end near the rotating arm 802 and the other end away from the rotating arm 802 to prevent backwash water leakage. The shaft plugs 806 and 807 can be integrally formed with the rotating shaft 804 or welded to both ends of the rotating shaft 804.

[0036] The drain seat housing 9 is fixed to the side of the inlet backwash seat 4 away from the housing 1 by a flange. The drain seat housing 9 is coaxial with the housing 1 and seals the inner hole 402 of the inlet backwash seat 12. The rotating arm 802 is disposed in the inner hole 402 of the inlet backwash seat 4, and a backwash suction port 803 is provided at the end of the rotating arm 802 away from the rotating shaft. The backwash suction port 803 is connected to the drain channel 801, and the backwash suction port 803 corresponds to the radial hole 403, so that the backwash water in the radial hole 403 can enter the backwash suction port 803. The rotating shaft 804 extends out of the inlet backwash seat 4. The external shaft 804 is inserted into the drain seat housing 9 and connected to the drain seat housing 9 via a bearing. The rotating shaft 804 inside the drain seat housing 9 has several drain holes 805, which are evenly distributed circumferentially along the rotating shaft 804 to ensure smooth flow of the drain fluid and maintain structural strength. The drain holes 805 are connected to the drain channel 801. The bottom of the drain seat housing 9 has a drain outlet 901 corresponding to the drain holes 805. A valve 10 is installed on the drain outlet 901 to control its opening and closing.

[0037] When valve 10 is opened, the backwash suction port 803 at the end of the rotating arm 802 is opposite to a radial hole 805. The filter element 6 corresponding to the radial hole 805 is connected to the sewage flow channel 801, and then to the sewage outlet 901, so that the clean water becomes backwash water and enters the filter element 6. The impurity particles in the filter element 6 enter the backwash suction port 803 with the backwash water through the radial hole 805. Then the sewage and impurities enter the sewage seat housing 9 along the sewage flow channel 801 and through the sewage outlet 805, and then flow out from the sewage outlet 901. At the same time, the rotating shaft 804 is rotated, so that the rotating arm 802 rotates, so that the backwash suction port 803 is aligned with the next adjacent radial hole 805. The steps are repeated to backwash the next adjacent filter element 3. The rotation is slow and continuous, and each filter element 3 is backwashed one by one.

[0038] Furthermore, such as Figure 6 As shown, the end face of the backwash suction port 803 is arc-shaped and is clearance-fitted with the inner hole 402 of the water inlet backwash seat 4. The arc-shaped end face of the backwash suction port 803 is coaxial with the inner hole 402 of the water inlet backwash seat 12, which facilitates the rotation of the rotating arm 802.

[0039] Furthermore, it also includes a drive device 11, which is fixed on the side of the drain seat housing 9 away from the housing 1; the drive device 11 drives the rotating shaft 804 to rotate, wherein the output shaft of the drive device 11 is rigidly connected to the shaft plug 807 to ensure that the coaxiality deviation is minimal. The rotation of the rotating shaft of the drive device 11 causes the rotating arm 802 to rotate, thereby backwashing each filter element 3 one by one.

[0040] Furthermore, each of the first filter element mounting holes 301 is provided with a filter element fixing seat 302 at the end away from the end cover 3, wherein the filter element fixing seat 302 is welded and fixed to the end cover 3; the end of the filter element 6 near the end cover 3 passes through the first filter element mounting hole 301 and is inserted into the filter element fixing seat 302; the side of the filter element fixing seat 302 away from the end cover 3 is threadedly connected to a filter element plug 7. By opening the filter element plug 7, the filter element 6 can be taken out for replacement. After the new filter element 6 is inserted into the filter element fixing seat 302, it enters the housing 1, and then is inserted into the second filter element mounting hole 401. The filter element plug 7 is then placed on the filter element fixing seat 302 to complete the replacement.

[0041] The working process of this utility model is as follows: During filtration, raw water enters the inner hole 402 of the inlet backwash seat 4 through the inlet pipe 2, and then passes through the radial hole 403 and the second filter element mounting hole 401 of the inlet backwash seat 4 in sequence to enter the inner hole surface of the filter element 6. Impurities larger than the gaps in the filter element 6 are intercepted, and purified water passes through the gaps in the filter element 6 to its outer circular surface and enters the filter purification area inside the housing 1. All the purified water filtered by the filter element 6 converges in the purification area and finally flows out from the outlet 5. During the filtration process, impurities gradually accumulate on the inner hole surface of the filter element 6, resulting in a pressure difference between the inlet and outlet sides.

[0042] During self-cleaning, valve 10 opens, and simultaneously, drive device 11 drives rotating shaft 804 to rotate slowly. The backwash suction port 803 of rotating arm 802 slowly sweeps through several radial holes 805 within the inner hole 402 of the inlet backwash seat 4. These radial holes 805 are connected to the atmosphere one by one through the drain channel 801 of the backwash rotating suction port 8 for a certain period. The corresponding filter element 6's inner hole surface is connected to the atmosphere for the same amount of time. At a certain pressure, purified water in the clean water zone flows forcefully from the outer surface of the corresponding filter element 6 through the gaps in the filter element 6 into the inner hole of the filter element 6, flushing down impurities trapped on the inner hole surface of the filter element 6. These impurities are then discharged with the water flow through valve 10. This process continues, backwashing each filter element 6 individually. Because the filtration area of ​​a single filter element 6 is small, and the inner hole of the filter element 6 is connected to the atmosphere, the purified water at a certain pressure in the clean water zone flows forcefully from the outer surface of the corresponding filter element 6 through the gaps in the filter element 6 into the inner hole of the filter element 6, resulting in high cleaning intensity.

Claims

1. A multi-core self-cleaning water filter, characterized by, It includes a shell (1), a water inlet pipe (2), an end cover (3) and a water inlet backwashing seat (4), One end of the shell (1) is fixed with the end cover (3), and the other end is fixed with the water inlet backwashing seat (4); at least one water outlet (5) is arranged on the shell (1); the water inlet backwashing seat (4) is annular; the water inlet pipe (2) is arranged in the shell (1), one end of the water inlet pipe (2) extends outward through the end cover (3), and the other end is inserted into the inner hole (402) of the water inlet backwashing seat (4); a partition plate (404) is arranged between the outer wall of the water inlet pipe (2) and the end of the inner hole (402) of the water inlet backwashing seat (4) close to the end cover (3), A plurality of filter cartridges (6) are arranged between the end cover (3) and the water inlet backwashing seat (4); a plurality of first filter cartridge mounting holes (301) corresponding to the plurality of filter cartridges (6) are arranged in the end cover (3); a plurality of second filter cartridge mounting holes (401) corresponding to the plurality of filter cartridges (6) are arranged on the side of the water inlet backwashing seat (4) close to the end cover (3); each filter cartridge (6) is inserted into the corresponding first filter cartridge mounting hole (301) on the side close to the end cover (3) and is inserted into the corresponding second filter cartridge mounting hole (401) on the side close to the water inlet backwashing seat (4); A plurality of radial holes (403) corresponding to the second filter cartridge mounting holes (401) are uniformly arranged on the inner wall of the inner hole (402) of the water inlet backwashing seat (4) in the circumferential direction; each second filter cartridge mounting hole (401) is in communication with the corresponding radial hole (403).

2. The multi-core self-cleaning water filter of claim 1, wherein, The plurality of filter cartridges (6) are uniformly distributed on one to three concentric distribution circles.

3. The multi-core self-cleaning water filter of claim 1, wherein, It also includes a backwashing rotating suction port piece (8) and a blowdown seat shell (9), the backwashing rotating suction port piece (8) is L-shaped structure, and L-shaped hole is arranged in the inside, forming blowdown flow channel (801); the backwashing rotating suction port piece (8) includes rotating arm (802) and rotating shaft (804); the rotating arm (802) is fixed on the wall of the rotating shaft (804); the blowdown seat shell (9) is fixed on the side of the water inlet backwashing seat (4) away from the shell (1); the rotating arm (802) is arranged in the inner hole (402) of the water inlet backwashing seat (4), and the end of the rotating arm (802) away from the rotating shaft is provided with backwashing suction port (803); the backwashing suction port (803) is in communication with the blowdown flow channel (801), and the backwashing suction port (803) corresponds to the radial hole (403); the rotating shaft (804) extends out of the water inlet backwashing seat (4) and is inserted into the blowdown seat shell (9); a plurality of blowdown holes (805) are arranged on the rotating shaft (804) in the blowdown seat shell (9); the plurality of blowdown holes (805) are in communication with the blowdown flow channel (801); the blowdown seat shell (9) is provided with blowdown pipe (901) corresponding to the blowdown hole (805) at the bottom; the valve (10) is mounted on the blowdown pipe (901).

4. The multi-core self-cleaning water filter of claim 3, wherein, The radial hole (403) is rectangular in shape, and the backwashing suction port (803) corresponds to the radial hole (403).

5. The multiport self-cleaning water filter of claim 3, wherein, The end surface of the backwash suction port (803) is in the form of a circular arc and is in clearance fit with the inner hole (402) of the water inlet backwash seat (4).

6. The multi-core self-cleaning water filter of claim 3, wherein, The drive device (11) is fixed on the side of the blowdown seat shell (9) away from the shell (1), and drives the rotation shaft (804) to rotate.

7. The multi-core self-cleaning water filter of claim 1, wherein, Each of the first filter core mounting holes (301) away from one end of the end cover (3) is provided with a filter core fixing seat (302), one end of the filter core (6) close to the end cover (3) is inserted into the filter core fixing seat (302) through the first filter core mounting hole (301), and the side of the filter core fixing seat (302) away from the end cover (3) is connected with a filter core plug cover (7).

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