Multi-core self-cleaning water filter

Abstract

The invention 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. The water inlet pipe is arranged in the shell, the size of the filter is reduced, the multiple filter elements are installed and distributed in one to three concentric distribution circles, the number of the filter elements can be large, the size of the whole equipment is small, the multiple radial holes are distributed in the inner cylindrical face of the water inlet backwashing base in the radial direction, and one filter element corresponds to one radial hole; during one-by-one backwashing, the backwashing strength is high, and the self-cleaning performance is good.

Description

Technical Field

[0001] The invention belongs to the technical field of water purification, industrial and civil circulating water, wastewater treatment and reuse, and particularly relates to a multi-core self-cleaning water filter. Background Art

[0002] In the technical fields of water purification, industrial and civil circulating water, wastewater treatment and reuse, water filters are widely used. There are many water filters with various structures, and there are also many types and models of self-cleaning water filters. However, there are fewer choices of water filters that can clean themselves thoroughly and do not require filter element replacement for a long time.

[0003] The multi-filter self-cleaning filter is a precision device that uses a filter to directly intercept impurities in the water and remove suspended matter and particulate matter in the water. The working principle of the general multi-filter self-cleaning filter is: the raw water to be treated enters the turbid water area of ​​the filter through the inlet, and enters the inner cavity of the filter element from bottom to top through the water distribution holes on the diaphragm. Impurities larger than the gap of the filter element are intercepted, and the clean water passes through the gap into the clean water area. All the liquids filtered by the filter element converge in the clean water area and finally flow out from the outlet. During the filtration process, impurities inside the filter element gradually accumulate, resulting in a pressure difference between the inside and outside. When the pressure difference reaches the preset value, the drain valve opens, releases the pressure and discharges the water. At the same time, the drive device drives the backwash arm to start moving and backwash the filter element. During backwashing, the inner cavity of the filter element is connected to the atmosphere (gauge pressure is 0) by the pressure relief valve, so that the filtered clean water on the outside of the filter element becomes backwash water. Under the action of the large pressure difference, the backwash water quickly flushes from the outside of the filter element to the inside, forming a large flushing and cleaning effect on the gap of the filter element.

[0004] Usually, the self-cleaning backwash suction ports of existing multi-core filter self-cleaning filters are distributed on the end surface of the filter cylinder, which makes this type of filter large in size and can generally only be set vertically. It cannot be effectively used in places with limited installation space.

[0005] For example, in the shipping industry, water filtration equipment is required to be small in size, light in weight, and strong in cleaning power; in the special environment of underground coal mines, when tasks requiring water filtration are required, great challenges are encountered; the existing multi-filter self-cleaning filters on the market are often too large to adapt to the needs of such small spaces, and thus cannot be effectively used. Summary of the invention

[0006] The object of the present invention is to provide a multi-core self-cleaning water filter with smaller dimensions, good self-cleaning performance, suitable for narrow spaces, and better economic and technical performance.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A multi-core self-cleaning water filter comprises a shell, a water inlet pipe, an end cover and a water inlet backwash seat.

[0009] An end cap is fixed to one end of the shell, and a water inlet backwash seat is fixed to the other end; at least one water outlet is provided on the shell; the water inlet backwash seat is annular; the water inlet pipe is arranged in the shell, the axis of the water inlet pipe is coaxial or parallel to the axis of the shell, 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 seat; 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 seat close to the end cap,

[0010] A plurality of filter elements are arranged between the end cover and the water inlet backwash seat, wherein the filter element is an annular cylindrical shape, and the axis of the filter element is parallel to the housing; the plurality of filter elements are evenly distributed on one to three concentric distribution circles; the end cover is provided with first filter element mounting holes corresponding to the plurality of filter elements; the side of the water inlet backwash seat close to the end cover is provided with second filter element mounting holes corresponding to the plurality of filter elements; each of the filter elements is inserted into the corresponding first filter element mounting hole on the side close to the end cover, and is inserted into the corresponding second filter element mounting hole on the end close to the water inlet backwash seat;

[0011] A plurality of radial holes corresponding to the second filter element mounting holes are evenly arranged on the inner wall of the inner hole of the water inlet backwash seat along the circumferential direction; each of the second filter element mounting holes is connected to the corresponding radial hole.

[0012] Preferably, it also includes a backwash rotary suction port and a sewage seat shell, the backwash rotary suction port is an L-shaped structure, and an L-shaped channel is opened inside to form a sewage flow channel; the backwash rotary suction port includes a rotating arm and a rotating shaft; the rotating arm is fixed on the rotating shaft wall; the sewage seat shell is fixed on the side of the water inlet backwash seat away from the shell; the rotating arm is arranged in the inner hole of the water inlet backwash seat, and a backwash suction port is opened at the end of the rotating arm away from the rotating shaft; the backwash suction port is connected with the sewage flow channel, and the backwash suction port corresponds to the radial hole; the rotating shaft extends out of the water inlet backwash seat and is inserted into the sewage seat shell; a number of sewage holes are opened on the rotating shaft in the sewage seat shell; a number of the sewage holes are connected with the sewage flow channel; a sewage pipe outlet corresponding to the sewage holes is provided at the bottom of the sewage seat shell; a valve is installed on the sewage pipe outlet.

[0013] Preferably, the orifice section of the radial hole is rectangular, and the orifice section of the backwash suction port corresponds to the radial hole.

[0014] Preferably, the end surface of the backwash suction port is arc-shaped and has a clearance fit with the inner hole.

[0015] Preferably, it also includes a driving device, which is fixed on a side of the sewage drain seat shell away from the shell; the driving device drives the rotating shaft to rotate.

[0016] Preferably, a filter element fixing seat is provided at one end of several of the first filter element mounting holes away from the end cover; the end of the filter element close to the end cover passes through the first filter element mounting hole and is inserted into the filter element fixing seat; a filter element blocking cover is connected to the side of the filter element fixing seat away from the end cover.

[0017] The present invention reduces the size of the filter by arranging the water inlet pipe in the shell, and installs multiple filter elements, which are distributed in one to three concentric distribution circles, so that the number of filter elements can be large, the cleaning intensity of a single filter element is large, and the overall device volume is small.

[0018] The present invention arranges the water inlet pipe in the shell, and the water inlet pipe also serves to increase the strength of the filter shell. The overall equipment uses less material, has a smaller volume, and has a lower manufacturing cost under the same pressure level and the same flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall external structure of the present invention;

[0020] Figure 2 It is a cross-sectional view of the shell;

[0021] Figure 3 It is a cross-sectional view of the present invention;

[0022] Figure 4 This is the cross-sectional view of the water inlet backwash seat;

[0023] Figure 5 It is a cross-sectional view of the backwash rotary suction port;

[0024] Figure 6 This is a cross-sectional view of the backwash suction port.

[0025] Figure 7 It is a cross-sectional view of the filter element distribution. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] like Figure 1-7 As shown, the multi-core self-cleaning water filter of the present invention comprises a housing 1, a water inlet pipe 2, an end cover 3 and a water inlet backwash seat 4.

[0028] An end cap 3 is welded and fixed at one end of the shell 1, and a water inlet backwash seat 4 is welded and fixed at the other end; at least one water outlet 5 is welded and fixed on the shell 1 to prevent the filter element 3 above the shell 1 from flowing into the filter element 3 without filtered water. At the same time, the inner wall of the water outlet 5 is polished to reduce the water flow resistance and ensure smooth water outflow, and an external welded flange is used as a connection;

[0029] The water inlet backwash seat 4 is annular; the water inlet pipe 2 is arranged in the shell 1, the axis of the water inlet pipe 2 is coaxial or parallel to the axis of 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 backwash seat 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 seat 4 close to the end cover 3, wherein the water inlet pipe 2 is inserted into the inner hole of the partition plate 404 and is welded and fixed to the partition plate 404, the partition plate 404 can be integrally formed with the water inlet backwash seat 4, and can also be welded in the water inlet backwash seat 4, the raw water is passed into the water inlet pipe 2, and enters the inner hole 402 of the water inlet backwash seat 4 through the water inlet pipe 2, and the partition plate 404 separates the clean water in the shell and the raw water in the inner hole 402 of the water inlet backwash seat 4;

[0030] A plurality of filter elements 6 are arranged between the end cover 3 and the water inlet backwash seat 4, wherein the filter element is an annular cylindrical shape, and the axis of the filter element is parallel to the housing; the plurality of filter elements 6 are evenly distributed on one to three concentric distribution circles, and the center of the distribution circle is on the axis of the housing 1. In this embodiment, Figure 7 As shown, a plurality of filter elements 6 are evenly and staggeredly distributed on two concentric distribution circles, so as to facilitate installation of a larger number of filter elements 6;

[0031] The end cover 3 is provided with a first filter element mounting hole 301 corresponding to a plurality of filter elements 6; the side of the water inlet backwash seat 4 close to the end cover 3 is provided with a second filter element mounting hole 401 corresponding to a plurality of filter elements 6; the plurality of filter elements 6 are evenly distributed on one to three concentric distribution circles, the center of the distribution circle is on the axis of the housing 1. In this embodiment, Figure 7 As shown, a plurality of filter elements 6 are evenly and staggeredly distributed on two concentric distribution circles, so as to facilitate installation of a larger number of filter elements 6;

[0032] The side of each filter element 6 close to the end cover 3 is inserted into the corresponding first filter element installation hole 301, and the end close to the water inlet backwash seat 4 is inserted into the corresponding second filter element installation hole 401;

[0033] The inner wall of the inner hole 402 of the water inlet backwash seat 4 is evenly provided with a plurality of radial holes 403 corresponding to the second filter element mounting hole 401 along the circumferential direction, wherein the radial holes 403 can be long strip holes, and the long sides are 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 of the second filter element mounting holes 401 is connected with the corresponding radial holes 403, and the raw water in the inner hole 402 of the water inlet backwash seat 4 enters the plurality of radial holes 403, and then enters the second filter element mounting hole 401 and the filter element 6, and after the filter element 6 filters the raw water, the clean water passes through the filter element 3 in the inner cavity of the shell 1, and the clean water is discharged through the water outlet 13, wherein the water outlet 13 is arranged above the shell 1, so as to prevent the filter element 3 above the shell 1 from flowing into without filtered water;

[0034] It also includes a backwash rotary suction port 8 and a sewage discharge seat shell 9. The backwash rotary suction port 8 is an L-shaped structure, and an L-shaped channel is correspondingly opened inside to form a sewage discharge channel 801; the backwash 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, wherein the end of the rotating shaft 804 close to the rotating arm 802 and the end away from the rotating arm 802 are both provided with shaft plugs 806 and 807 to prevent backwash water leakage, wherein the shaft plugs 806 and 807 can be integrally formed with the rotating shaft 804, and can also be welded and fixed to both ends of the rotating shaft 804;

[0035] The sewage seat shell 9 is fixed to the side of the water inlet backwash seat 4 away from the shell 1 through a flange, wherein the sewage seat shell 9 is coaxial with the shell 1 and seals the inner hole 402 of the water inlet backwash seat 12; the rotating arm 802 is arranged in the inner hole 402 of the water inlet backwash seat 4, and a backwash suction port 803 is opened at one end of the rotating arm 802 away from the rotating axis; the backwash suction port 803 is connected to the sewage flow 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 axis 804 extends out of the water inlet backwash seat 4 The outer part is inserted into the drain seat housing 9, and the rotating shaft 804 is connected to the drain seat housing 9 through a bearing; a plurality of drain holes 805 are provided on the rotating shaft 804 in the drain seat housing 9, wherein the drain holes 805 are evenly distributed on the rotating shaft 804 in the axial direction and circumference, which not only ensures the smooth passage of the drain fluid, but also ensures a certain structural strength; a plurality of drain holes 805 are connected to the drain flow channel 801; a drain pipe port 901 corresponding to the drain hole 805 is provided at the bottom of the drain seat housing 9; a valve 10 is installed on the drain pipe port 901 for controlling the opening and closing of the drain pipe port 901;

[0036] When the valve 10 is opened, the backwash suction port 803 at the end of the rotating arm 802 is opposite to a radial hole 805, and the filter element 6 corresponding to the radial hole 805 is connected to the sewage flow channel 801, and then to the sewage pipe port 901, so that the clean water becomes backwash water and enters the filter element 6, and the impurity particles in the filter element 6 enter the backwash suction port 803 with the backwash water through the radial hole 805, and then the sewage and impurities follow the sewage flow channel 801, enter the sewage seat shell 9 through the sewage hole 805, and then flow out from the sewage pipe port 901, and at the same time, the rotating shaft 804 is rotated to rotate the rotating arm 802, so that the backwash suction port 803 corresponds to the next adjacent radial hole 805, repeat the steps, backwash the next adjacent filter element 3, and rotate slowly continuously to backwash each filter element 3 one by one.

[0037] Further, such as Figure 6As shown, the end face of the backwash suction port 803 is arc-shaped and has a clearance fit with the inner hole 402 of the water inlet backwash seat 4, wherein 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, facilitating the rotation of the rotating arm 802.

[0038] Furthermore, it also includes a driving device 11, which is fixed on the side of the drain seat housing 9 away from the housing 1; the driving device 11 drives the rotating shaft 804 to rotate, wherein the output shaft of the driving device 11 is rigidly connected to the shaft plug 807 to ensure that the coaxiality deviation is extremely small, and the rotating shaft of the driving device 11 rotates, thereby rotating the rotating arm 802 to backwash each filter element 3 one by one.

[0039] Furthermore, a filter element fixing seat 302 is provided at the end of the first filter element mounting holes 301 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 close to 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 with a filter element plugging cover 7, and the filter element 6 can be taken out for replacement by opening the filter element plugging cover 7. After the new filter element 6 is inserted into the filter element fixing seat 302, it enters the housing 1 and is then inserted into the second filter element mounting hole 401, and the filter element plugging cover 7 is covered on the filter element fixing seat 302 to complete the replacement.

[0040] Working process of the present invention: during filtration, raw water enters the inner hole 402 of the water inlet backwash seat 4 through the water inlet pipe 2, and then enters the inner hole surface of the filter element 6 through the radial hole 403 of the water inlet backwash seat 4 and the second filter element installation hole 401 in sequence, and impurities larger than the gap of the filter element 6 are intercepted, and the clean water passes through the gap of the filter element 6 and enters its outer cylindrical surface, and enters the filter water purification area in the housing 1, and all the clean water filtered by the filter element 6 converges in the clean water area, and finally flows out from the water outlet 5. During the filtration process, impurities on the inner hole surface of the filter element 6 gradually accumulate, resulting in a pressure difference between the inlet and outlet water.

[0041] During self-cleaning, the valve 10 is opened, and at the same time, the driving device 11 drives the rotating shaft 804 to rotate slowly, and the backwash suction port 803 of the rotating arm 802 slowly sweeps a plurality of radial holes 805 in the inner hole 402 of the water inlet backwash seat 4. The plurality of radial holes 805 are connected to the atmosphere one by one through the sewage discharge channel 801 of the backwash rotating suction port 8 for a certain period of time, and the inner hole surface of the corresponding filter element 6 is connected to the atmosphere for the same period of time. The clean water with a certain pressure in the clean water area flows strongly from the outer cylindrical surface of the corresponding filter element 6 through the gap of the filter element 6 to the inner hole of the filter element 6, flushing the impurities trapped on the inner hole surface of the filter element 6 and discharging them through the valve 10 with the water flow; the rotation is continued, and the filter elements 6 are backwashed one by one. Since the filtering area of ​​a single filter element 6 is small and the inner hole of the filter element 6 is connected to the atmosphere, the clean water with a certain pressure in the clean water area flows strongly from the outer cylindrical surface of the corresponding filter element 6 through the gap of the filter element 6 to the inner hole of the filter element 6, and the cleaning intensity is high.

Claims

1. A multi-core self-cleaning water filter, comprising a housing (1), a water inlet pipe (2), an end cover (3) and a water inlet backwash seat (4), An end cover (3) is fixed to one end of the shell (1), and a water inlet backwash seat (4) is fixed to the other end; at least one water outlet (5) is provided on the shell (1); the water inlet backwash seat (4) is annular; the water inlet pipe (2) is arranged in the shell (1), one end of the water inlet pipe (2) passes through the end cover (3) and extends outward, and the other end is inserted into the inner hole (402) of the water inlet backwash seat (4); a partition plate (404) is provided between the outer wall of the water inlet pipe (2) and the inner hole (402) of the water inlet backwash seat (4) close to the end cover (3), A plurality of filter elements (6) are arranged between the end cover (3) and the water inlet backwash seat (4); the plurality of filter elements (6) are evenly distributed on one to three concentric distribution circles; the end cover (3) is provided with first filter element mounting holes (301) corresponding to the plurality of filter elements (6); a side of the water inlet backwash seat (4) close to the end cover (3) is provided with second filter element mounting holes (401) corresponding to the plurality of filter elements (6); the side of each filter element (6) close to the end cover (3) is inserted into the corresponding first filter element mounting hole (301), and the end close to the water inlet backwash seat (4) is inserted into the corresponding second filter element mounting hole (401); The inner wall of the inner hole (402) of the water inlet backwash seat (4) is evenly provided with a plurality of radial holes (403) corresponding to the second filter element mounting hole (401) along the circumferential direction; each of the second filter element mounting holes (401) is connected to the corresponding radial hole (403).

2. The multi-core self-cleaning water filter according to claim 1, characterized in that: It also includes a backwash rotary suction port (8) and a sewage discharge seat shell (9); the backwash rotary suction port (8) is an L-shaped structure, and an L-shaped hole is opened inside to form a sewage discharge channel (801); the backwash rotary suction port (8) includes a rotating arm (802) and a rotating shaft (804); the rotating arm (802) is fixed on the wall of the rotating shaft (804); the sewage discharge seat shell (9) is fixed on the side of the water inlet backwash seat (4) away from the shell (1); the rotating arm (802) is arranged in the inner hole (402) of the water inlet backwash seat (4), and a backwash suction port (401) is opened at one end of the rotating arm (802) away from the rotating shaft. 803); the backwash suction port (803) is connected to the sewage discharge channel (801), and the backwash suction port (803) corresponds to the radial hole (403); the rotating shaft (804) extends out of the water inlet backwash seat (4) and is inserted into the sewage discharge seat shell (9); a plurality of sewage discharge holes (805) are provided on the rotating shaft (804) in the sewage discharge seat shell (9); a plurality of sewage discharge holes (805) are connected to the sewage discharge channel (801); a sewage discharge pipe port (901) corresponding to the sewage discharge holes (805) is provided at the bottom of the sewage discharge seat shell (9); and a valve (10) is installed on the sewage discharge pipe port (901).

3. The multi-core self-cleaning water filter according to claim 1, characterized in that: The orifice section of the radial hole (403) is rectangular, and the orifice section of the backwash suction port (803) corresponds to the radial hole (121).

4. The multi-core self-cleaning water filter according to claim 2, characterized in that: The end surface of the backwash suction port (803) is in an arc shape and is clearance-matched with the inner hole (402) of the water inlet backwash seat (4).

5. The multi-core self-cleaning water filter according to claim 2, characterized in that: It also comprises a driving device (11), wherein the driving device (11) is fixed on a side of the sewage discharge seat housing (9) away from the housing (1); the driving device (11) drives the rotating shaft (804) to rotate.

6. The multi-core self-cleaning water filter according to claim 1, characterized in that: A filter element fixing seat (302) is provided at one end of the plurality of first filter element mounting holes (301) away from the end cover (3); the end of the filter element (6) close to the end cover (3) passes through the first filter element mounting hole (301) and is inserted into the filter element fixing seat (302); and a filter element blocking cover (7) is connected to the side of the filter element fixing seat (302) away from the end cover (3).

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