Backwash filter

Abstract

The utility model provides a backwash filter which comprises a tank body, a water inlet, a water outlet and an exhaust port are respectively arranged on two sides of the tank body, an air inlet and a drain outlet are respectively arranged at two ends of the tank body, the backwash filter further comprises a filter element, an upper sealing disc and a lower sealing disc are respectively arranged in the tank body, a plurality of through holes are respectively arranged on the upper sealing disc and the lower sealing disc, and the filter element is arranged in the tank body. The filter element comprises a fixing frame penetrating between the two corresponding through holes and a plurality of laminations arranged on the fixing frame in a sleeving mode, the laminations are provided with a plurality of filtering grooves, the filtering grooves of the laminations are distributed in a staggered mode, a spring is arranged at the bottom of the fixing frame, and the spring abuts against the bottom end of the fixing frame so that the laminations on the top layer of the fixing frame can abut against the upper sealing disc. The pressure of backwashing air or backwashing water on the filter element is reduced, and the spring is compressed, so that the laminations at the top of the fixed frame are separated from the upper sealing disc, the filter grooves between the laminations are completely opened, impurities left on the laminations are removed, the contact area between the backwashing air or backwashing water and the filter element is increased, and the backwashing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a backwash filter. Background Art

[0002] A backwash filter uses a filter element to directly intercept impurities in the water, removing suspended solids and particulate matter, reducing turbidity, and purifying the water. When the filter is operating, water flows through the filter element, intercepting impurities. When sewage needs to be discharged, the water flows back to flush the filter element, removing impurities and achieving online sewage discharge without shutting down the system. However, currently used backwash filters cannot fully flush the filter element due to their integrated design. Furthermore, the water pressure is not concentrated during backwashing, resulting in a relatively poor backwashing effect. Utility Model Content

[0003] In response to the deficiencies in the prior art, the utility model provides a backwash filter, which solves the problem that the filter element in the prior art adopts an integrated design, cannot fully flush the filter element, and the water source pressure is not concentrated during backwashing, resulting in a relatively poor backwashing effect of the filter element.

[0004] According to the embodiment of the present invention, the present invention adopts the following technical solutions:

[0005] A backwash filter comprises a tank body, wherein two sides of the tank body are respectively provided with a water inlet, a water outlet and an exhaust port, and two ends of the tank body are respectively provided with an air inlet and a sewage outlet, and further comprises:

[0006] The filter element has an upper sealing disk and a lower sealing disk in the tank body, and both the upper sealing disk and the lower sealing disk are provided with a plurality of through holes. The filter element includes a fixing frame passing through the corresponding two through holes and a plurality of laminates sleeved on the fixing frame. The laminates have a plurality of filter grooves, and the filter grooves of the plurality of laminates are staggered. A spring is provided at the bottom of the fixing frame, and the spring abuts against the bottom end of the fixing frame so that the laminate on the top layer of the fixing frame abuts against the upper sealing disk.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] In this solution, filter elements are installed in the through holes of the upper and lower sealing discs. During normal filtration, raw water enters from the water inlet, and the various laminates abut against each other under the action of the spring and water pressure, and the filter grooves between the laminates are staggered to form a channel for filtration. The filtered water flows through the space between the laminates and the fixed frame to be discharged from the through holes of the upper sealing disc, and finally discharged from the water outlet; during backwashing, backwash air or backwash water enters the tank body through the air inlet, and the filter element is subjected to the pressure drop of the backwash air or backwash water, and the spring is compressed, causing the laminates on the top of the fixed frame to separate from the upper sealing disc, so that each laminate has a certain amount of activity space, so that the filter grooves between the laminates are fully opened, and impurities remaining on the laminates are easily removed and finally discharged through the drain outlet, increasing the contact area between the backwash air or backwash water and the filter element, thereby improving the backwashing efficiency.

[0009] Preferably, the upper sealing disc and the lower sealing disc are fixedly connected via a connecting rod.

[0010] Preferably, a support bracket is fixedly provided in the tank body to separate the interior of the tank body into an upper cavity and a lower cavity. The upper sealing disc is located in the upper cavity and is installed on the support bracket so that the filter element is located in the lower cavity and corresponds to the water inlet.

[0011] Preferably, the support bracket and the upper sealing plate are both provided with a plurality of assembly holes, and the plurality of assembly holes correspond to each other one by one.

[0012] Preferably, a second lifting ring is fixedly provided on the top of the upper sealing plate.

[0013] Preferably, a base is fixedly provided at the bottom end of the fixing frame, and the base abuts against the top end of the spring.

[0014] Preferably, a positioning rod is fixedly provided at the bottom end of the base, and the positioning rod is passed through the corresponding through hole.

[0015] Preferably, a first hanging ring is provided on the top of the tank body.

[0016] Preferably, two supporting brackets are correspondingly provided on both sides of the tank body.

[0017] Preferably, the tank body is provided with two pressure gauges corresponding to the upper cavity and the lower cavity respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of one side of an embodiment of the utility model.

[0019] Figure 2 It is a structural schematic diagram of another side of an embodiment of the utility model.

[0020] Figure 3 Schematic diagram of the internal structure of an embodiment of the present utility model.

[0021] Figure 4 This is a structural schematic diagram of an embodiment of the present invention in which a filter element is installed between an upper sealing disk and a lower sealing disk.

[0022] Figure 5 It is a schematic structural diagram of the lamination in an embodiment of the present utility model.

[0023] Figure 6 It is a structural schematic diagram of the fixing frame and the base in an embodiment of the present utility model.

[0024] In the above drawings: 1. Tank body; 101. First lifting ring; 102. Support bracket; 103. Upper cavity; 104. Lower cavity; 2. Water inlet; 3. Water outlet; 4. Air inlet; 5. Sewage outlet; 6. Filter element; 601. Lamination; 602. Fixing bracket; 603. Base; 604. Positioning rod; 7. Spring; 8. Support bracket; 9. Upper sealing plate; 901. Through hole; 902. Second lifting ring; 903. Assembly hole; 10. Lower sealing plate; 11. Connecting rod; 12. Exhaust port; 13. Pressure gauge. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 6 As shown, the embodiment of the utility model proposes a backwash filter, including a tank body 1, with a water inlet 2, a water outlet 3 and an exhaust port 12 on both sides of the tank body 1, an air inlet 4 and a sewage outlet 5 at both ends of the tank body 1, and further comprising:

[0027] The filter element 6 and the tank body 1 are respectively provided with an upper sealing disk 9 and a lower sealing disk 10, and the upper sealing disk 9 and the lower sealing disk 10 are both provided with a plurality of through holes 901. The filter element 6 includes a fixing frame 602 passing through the corresponding two through holes 901 and a plurality of laminates 601 sleeved on the fixing frame 602. The laminate 601 has a plurality of filter grooves, and the filter grooves of the plurality of laminates 601 are staggered. A spring 7 is provided at the bottom of the fixing frame 602, and the spring 7 abuts against the bottom end of the fixing frame 602 so that the laminate 601 on the top layer of the fixing frame 602 abuts against the upper sealing disk 9.

[0028] In the embodiment of the present invention, the upper sealing disc 9 and the lower sealing disc 10 have the same structure, and the through holes 901 on the upper sealing disc 9 and the lower sealing disc 10 correspond to each other, and are used to install the strip-shaped fixing frame 602. When the filter element 6 is formed, a plurality of laminates 601 are sequentially overlapped and installed on the fixing frame 602, and the filter element 6 has a plurality of filter slots. When the laminates 601 are installed, the filter slots in each laminate 601 are staggered and distributed, so that the filter element 6 as a whole forms a deep filtration structure with a plurality of filter channels. After the laminates 601 are installed on the fixing frame 602, it is seen that Figure 6The fixing frame 602 is Y-shaped. When the inner circle of the stacking plate 601 is sleeved on the Y-shaped fixing frame 602, the angles of the fixing frame 602 form channels for water to flow through. Finally, each filter element 6 is installed between the upper sealing plate 9 and the lower sealing plate 10, and under the action of the spring 7 in the lower sealing plate 10, the stacking plate 601 on the top of the fixing frame 602 is abutted against the upper sealing plate 9.

[0029] During normal filtration, the exhaust port 12, the air inlet 4 and the sewage outlet 5 are closed, and the water inlet 2 and the water outlet 3 are opened. The raw water enters the tank body 1 through the water inlet 2, and passes through the filter grooves of each laminate 601 under the action of pressure. The filtered water enters the channels at the three angle positions of the fixing frame 602, flows out of the top of the fixing frame 602 (the position of the through hole 901) and enters the top area of ​​the upper sealing plate 9, and is finally discharged from the water outlet 3.

[0030] Secondly, during backwashing, the water inlet 2, water outlet 3 and exhaust port 12 are closed, and the air inlet 4 and sewage outlet 5 are opened. Backwash air or backwash water is injected from the air inlet 4. Under the pressure of the backwash air or backwash water, the fixed frame 602 is pressed down, thereby compressing the spring 7 at the bottom of the fixed frame 602, so that the gaps between the laminates 601 are completely opened, and the impurities remaining on the laminates 601 are easily removed and finally discharged through the sewage outlet 5. After the backwashing is completed, the water inlet 2 and exhaust port 12 are opened, and the air inlet 4, water outlet 3 and sewage outlet 5 are closed. Raw water enters the tank body 1 from the water inlet 2 and flows out through the exhaust port 12, thereby discharging the backwash medium remaining in the tank body 1. After the exhaust is completed, the exhaust port 12 is closed, and the water outlet 3 is opened to continue the filtration operation.

[0031] Specifically, such as Figure 3 and Figure 4 As shown, the upper sealing disc 9 and the lower sealing disc 10 are fixedly connected by a connecting rod 11; the upper sealing disc 9 and the lower sealing disc 10 are fixed together by the connecting rod 11, so that the upper sealing disc 9 and the lower sealing disc 10 are a whole, ensuring the stability of the filter element 6 during the filtration process.

[0032] Specifically, such as Figure 3As shown, a support bracket 8 is fixedly provided in the tank body 1 to separate the interior of the tank body 1 into an upper cavity 103 and a lower cavity 104. The upper sealing plate 9 is located in the upper cavity 103 and is installed on the support bracket 8 so that the filter element 6 is located in the lower cavity 104 and corresponds to the water inlet 2. Under the action of the support bracket 8, the stability of the upper sealing plate 9 and the lower sealing plate 10 in the tank body 1 is guaranteed. When the upper sealing plate 9 and the lower sealing plate 10 are installed, the separation of the upper cavity 103 and the lower cavity 104 is completed. Moreover, the support bracket 8 and the upper sealing plate 9 are provided with a plurality of assembly holes 903, and the plurality of assembly holes 903 correspond to each other. The upper sealing plate 9 can be fixedly mounted on the support bracket 8 by passing bolts through the corresponding assembly holes 903 one by one, thereby further ensuring the stability during filtering use. Moreover, a second lifting ring 902 is fixed on the top of the upper sealing plate 9. Since the filter elements 6 are heavy after being assembled between the upper cavity 103 and the lower cavity 104, the second lifting ring 902 can be used to conveniently lift them into the tank body 1 for installation.

[0033] Specifically, such as Figure 6 As shown, a base 603 is fixed to the bottom end of the fixing frame 602, and the base 603 abuts against the top end of the spring 7. Under the action of the base 603, the contact area between the fixing frame 602 and the spring 7 is increased, providing a stable support point, ensuring that the fixing frame 602 and the lamination stack thereon can be well supported in any state.

[0034] Secondly, a positioning rod 604 is fixed to the bottom end of the base 603, and the positioning rod 604 is passed through the corresponding through hole 901. The positioning rod 604 passes through the through hole 901 to ensure the radial stability of the filter element 6 and prevents deviation.

[0035] Specifically, such as Figure 2 As shown, a first lifting ring 101 is provided on the top of the tank body 1; since the entire filter is heavy, when installing it, the entire filter is installed in a designated working area through the cooperation of the first lifting ring 101 and the lifting equipment.

[0036] And, as Figure 1 As shown, two supporting brackets 102 are provided on both sides of the tank body 1. The supporting brackets 102 are provided with mounting holes. After being hoisted to the designated working area, the whole is supported by the supporting brackets 102 and fixed by bolts.

[0037] Specifically, such as Figure 1 As shown, the tank body 1 is provided with two pressure gauges 13 corresponding to the upper cavity 103 and the lower cavity 104 respectively. The pressure gauges 13 can be used to detect the pressure of the upper cavity 103 and the lower cavity 104 during each working process to ensure a certain safety.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A backwash filter, comprising a tank body (1), wherein both sides of the tank body (1) are respectively provided with a water inlet (2), a water outlet (3) and an exhaust port (12), and both ends of the tank body (1) are respectively provided with an air inlet (4) and a sewage outlet (5), characterized in that: Also includes: A filter element (6), wherein an upper sealing disc (9) and a lower sealing disc (10) are respectively provided in the tank body (1), wherein the upper sealing disc (9) and the lower sealing disc (10) are both provided with a plurality of through holes (901), wherein the filter element (6) comprises a fixing frame (602) passing between two corresponding through holes (901) and a plurality of laminates (601) sleeved on the fixing frame (602), wherein the laminates (601) have a plurality of filter grooves, and the filter grooves of the plurality of laminates (601) are staggeredly distributed, and a spring (7) is provided at the bottom of the fixing frame (602), wherein the spring (7) abuts against the bottom end of the fixing frame (602), so that the laminates (601) on the top layer of the fixing frame (602) abut against the upper sealing disc (9).

2. A backwash filter according to claim 1, characterized in that: The upper sealing disc (9) and the lower sealing disc (10) are fixedly connected via a connecting rod (11).

3. A backwash filter according to claim 2, characterized in that: A support bracket (8) is fixedly provided inside the tank body (1) to divide the interior of the tank body (1) into an upper cavity (103) and a lower cavity (104); the upper sealing disc (9) is located in the upper cavity (103) and is mounted on the support bracket (8) so that the filter element (6) is located in the lower cavity (104) and corresponds to the water inlet (2).

4. A backwash filter according to claim 3, characterized in that: The support bracket (8) and the upper sealing plate (9) are both provided with a plurality of assembly holes (903), and the plurality of assembly holes (903) correspond to each other one by one.

5. A backwash filter according to any one of claims 1 to 4, characterized in that: A second lifting ring (902) is fixedly provided on the top of the upper sealing plate (9).

6. A backwash filter according to claim 1, characterized in that: A base (603) is fixedly provided at the bottom end of the fixing frame (602), and the base (603) abuts against the top end of the spring (7).

7. A backwash filter according to claim 6, characterized in that: A positioning rod (604) is fixedly provided at the bottom end of the base (603), and the positioning rod (604) is passed through the corresponding through hole (901).

8. A backwash filter according to claim 1, characterized in that: A first hanging ring (101) is provided on the top of the tank body (1).

9. A backwash filter according to claim 1, characterized in that: Two supporting brackets (102) are correspondingly provided on both sides of the tank body (1).

10. A backwash filter according to claim 3, characterized in that: The tank body (1) is provided with two pressure gauges (13) corresponding to the upper cavity (103) and the lower cavity (104) respectively.

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