Precision filter with backwashing function

Abstract

The utility model discloses a precision filter with a backwashing function, which comprises a shell, a water inlet and a water outlet are arranged on the shell, a filter element and a baffle plate are connected in the shell, and a backwashing mechanism is connected in the shell; the backwashing mechanism comprises a receiving hopper and a discharging pipe; the discharging pipe is connected with a valve; the upper end of the receiving hopper is communicated with the interior of the filter element; a clamping groove is formed in the baffle plate; a plurality of through holes communicated with the clamping groove are formed in the upper end of the baffle; a limiting block is movably connected into the clamping groove; the lower end of the limiting block is connected with a pressing plate; when the limiting block is located at the lower end of the clamping groove, the bottom end of the pressing plate abuts against the upper end of the receiving hopper; when the limiting block is located at the upper end of the clamping groove, the bottom end of the pressing plate is flush with the lower end of the baffle. The backwashing mechanism is connected in the shell, so that pressure difference is generated on the inner side and the outer side of the filter element, backwashing is carried out on the filter element, and meanwhile, a gap is prevented from being generated between the receiving hopper and the baffle.

Description

Technical Field

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

[0002] In fine production, filtration is the most common operation, and cleaning of the filtration equipment after filtration becomes very necessary. Backwashing, also known as filter tank flushing, aims to remove impurities trapped in the filter layer and restore the filtration capacity of the filter tank in a short time.

[0003] However, the backwash filter in the prior art has limited ability to clean suspended solids deposited on the surface of the filter material, so that the cleaning effect is not very good, especially when multiple filter elements are arranged in the filter, it is difficult to backwash the filter elements one by one, and it is difficult for the discharge end and the filter element to fit tightly during backwashing, which can easily cause debris to remain in the filter again, affecting the working efficiency of the filter. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art and proposes a precision filter with a backwashing function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A precision filter with a backwashing function comprises a shell, which is provided with a water inlet and a water outlet, a filter element and a baffle connected to the shell, and a backwashing mechanism connected to the shell; the backwashing mechanism comprises a receiving hopper and a discharge pipe; the discharge pipe is connected with a valve; the upper end of the receiving hopper is communicated with the interior of the filter element; a slot is provided in the baffle; a number of through holes communicating with the slot are provided on the upper end of the baffle; a limit block is movably connected in the slot; a pressure plate is connected to the lower end of the limit block; and when the limit block is at the lower end of the slot, the bottom end of the pressure plate abuts against the upper end of the receiving hopper; when the limit block is at the upper end of the slot, the bottom end of the pressure plate is flush with the lower end of the baffle.

[0007] Preferably, a support tube is connected to the lower inner end of the shell; the discharge tube is arranged at the upper end of the support tube and is internally communicated; the upper end of the support tube passes through the baffle and is connected to an annular plate; the support tube is rotatably connected to the baffle through the annular plate; the lower end of the support tube passes through the shell and is connected to a driving device; the support tube is driven to rotate by the driving device.

[0008] Preferably, the discharge pipe is connected with a connecting block at one end close to the support pipe; the discharge pipe is fixedly connected to the baffle through the connecting block; and the annular plate is rotatably connected to the lower end of the connecting block.

[0009] Preferably, a fixed tube is connected to the side of the support tube; the outer end of the fixed tube is fixedly connected to the lower end of the receiving hopper; and the fixed tube and the support tube are communicated with each other.

[0010] Preferably, the baffle is provided with a plurality of connection grooves matching the filter element; and the plurality of connection grooves are arranged in a ring shape with the support tube as the center; and the baffle is fixedly connected to the lower end of the filter element through the connection grooves.

[0011] Preferably, a connecting platform is provided at the upper end of the receiving hopper; the connecting platform is arranged parallel to the lower end of the pressing plate; and the lower end of the pressing plate abuts against the connecting platform.

[0012] Compared with the prior art, the utility model provides a precision filter with backwashing function, which has the following beneficial effects:

[0013] The precision filter with backwashing function is connected with a backwashing mechanism in a shell, and a receiving hopper and a discharge pipe are arranged at the lower end of the filter element. The valve on the discharge pipe is opened to generate a pressure difference between the inside and outside of the filter element, and the water filtered by other filter elements flows into the inside to backwash it. At the same time, the limit block and the pressure plate in the tank move downward to the connecting platform at the upper end of the receiving hopper due to the upper and lower pressure difference, so as to avoid the generation of a gap between the receiving hopper and the baffle plate, so that the filter residue during backwashing is successfully discharged from the discharge pipe; and a support pipe is connected to the lower end of the backwashing mechanism, and the support pipe can drive the receiving hopper to rotate, so that the backwashing mechanism can backwash multiple filter elements one by one.

[0014] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 For this utility model Figure 1 The structural diagram at A in the middle;

[0017] Figure 3 It is a partial structural schematic diagram of the baffle connection in the utility model;

[0018] Figure 4 It is a top view of the baffle in the utility model;

[0019] Figure 5 For this utility model Figure 1 Schematic diagram of the structure at B in the figure.

[0020] In the figure: 10 shell, 11 water inlet, 12 water outlet, 13 filter element, 14 baffle, 21 slot, 22 limit block, 23 through hole, 24 pressure plate, 25 connecting slot, 31 hopper, 32 fixed pipe, 33 discharge pipe, 34 valve, 35 support pipe, 36, driving device, 37 connecting block, 38 annular plate, 39 connecting platform. DETAILED DESCRIPTION

[0021] The following will refer to Figure 1-5 , a specific implementation of the precision filter with backwashing function in the utility model is introduced, including a shell 10, on which a water inlet 11 and a water outlet 12 are provided, a filter element 13 and a baffle 14 are connected to the shell 10, and a backwashing mechanism is connected to the shell 10; the backwashing mechanism includes a receiving hopper 31 and a discharge pipe 33; a valve 34 is connected to the discharge pipe 33; the upper end of the receiving hopper 31 is communicated with the inside of the filter element 13; the receiving hopper 31 abuts against the lower end of the filter element 13, so that a pressure difference is generated between the inside and outside of the filter element 13, which is convenient for backwashing the filter element 13.

[0022] In order to reduce the gap between the receiving hopper 31 and the baffle 14, a slot 21 is provided in the baffle 14; a plurality of through holes 23 communicating with the slot 21 are provided at the upper end of the baffle 14; a limit block 22 is movably connected in the slot 21; a pressure plate 24 is connected to the lower end of the limit block 22; and when the limit block 22 is at the lower end of the slot 21, the bottom end of the pressure plate 24 abuts against the upper end of the receiving hopper 31; a connecting platform 39 is provided at the upper end of the receiving hopper 31; the connecting platform 39 is arranged parallel to the lower end of the pressure plate 24; the lower end of the pressure plate 24 abuts against the connecting platform 39; when the limit block 22 is at the upper end of the slot 21, the bottom end of the pressure plate 24 is flush with the lower end of the baffle 14, so that the limit block 2 and the pressure plate 24 move up and down due to the difference in water pressure.

[0023] In combination with actual filtering needs, multiple connecting grooves 25 matching the filter element 13 are provided on the baffle 14, that is, multiple filter elements 13 are connected in the shell 10, and the multiple connecting grooves 25 are arranged in a ring with the support tube 35 as the center; the baffle 14 is fixedly connected to the lower end of the filter element 13 through the connecting groove 25.

[0024] When the filter is filtering, water enters from the water inlet 11, enters the lower end of the filter element 13 for filtration, and then is discharged from the side of the filter element 13, and then discharged from the water outlet 12. At this time, the receiving hopper 31 is not connected to the lower end of the filter element 13. Since the pressure at the upper end of the baffle 14 is greater than the pressure at the upper end, the limit block 22 and the pressure plate 24 in the slot 21 move upward to abut against the upper end of the slot 21. When it is necessary to backwash one of the filter elements 13, the receiving hopper 31 is rotated to the lower end of the filter element 13, and the valve 34 is opened to connect the discharge pipe 33 with the inner side of the filter element 13, so that a pressure difference is generated between the inner and outer sides of the filter element 13, and the water filtered by the other filter elements 13 flows into the inside to backwash it. At the same time, the limit block 22 and the pressure plate 24 in the slot 21 move downward to the connection platform 39 at the upper end of the receiving hopper 31 due to the pressure difference between the upper and lower ends, so as to avoid the formation of a gap between the receiving hopper 31 and the baffle 14, so that the filter residue during backwashing can be successfully discharged from the discharge pipe 33.

[0025] In order to facilitate the backwashing mechanism to backwash multiple filter elements 13, a support tube 35 is connected to the lower end of the inner side of the shell 10. For easy use, the support tube 35 should be in the center position; the discharge pipe 33 is arranged at the upper end of the support tube 35 and the inside is connected; the upper end of the support tube 35 passes through the baffle 14 and is connected to the annular plate 38; the support tube 35 is rotatably connected to the baffle 14 through the annular plate 38; the lower end of the support tube 35 passes through the shell 10 and is connected to the driving device 36; the support tube 35 is driven to rotate by the driving device 36.

[0026] The discharge pipe 33 is connected to a connecting block 37 at one end close to the support pipe 35; the discharge pipe 33 is fixedly connected to the baffle 14 via the connecting block 37; the annular plate 38 is rotatably connected to the lower end of the connecting block 37, so that when the support pipe 35 and the annular plate 38 rotate, the discharge pipe 33 does not rotate, thereby preventing the discharge pipe 33 from rotating and folding in the shell 10.

[0027] The side of the support tube 35 is connected to a fixed tube 32; the outer end of the fixed tube 32 is fixedly connected to the lower end of the receiving hopper 31; the fixed tube 32 and the support tube 35 are internally communicated, and the receiving hopper 31 can be supported by the fixed tube 32, so that the distance between the upper end of the receiving hopper 31 and the baffle 14 is small.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A precision filter with backwashing function, comprising a housing (10), wherein the housing (10) is provided with a water inlet (11) and a water outlet (12), wherein a filter element (13) and a baffle (14) are connected to the housing (10), characterized in that: A backwashing mechanism is connected inside the housing (10); the backwashing mechanism comprises a receiving hopper (31) and a discharge pipe (33); a valve (34) is connected to the discharge pipe (33); the upper end of the receiving hopper (31) is communicated with the interior of the filter element (13); a slot (21) is provided inside the baffle (14); a plurality of through holes (23) communicating with the slot (21) are provided at the upper end of the baffle (14); a limit block (22) is movably connected inside the slot (21); a pressure plate (24) is connected to the lower end of the limit block (22); and when the limit block (22) is at the lower end of the slot (21), the bottom end of the pressure plate (24) abuts against the upper end of the receiving hopper (31); and when the limit block (22) is at the upper end of the slot (21), the bottom end of the pressure plate (24) is flush with the lower end of the baffle (14).

2. A precision filter with backwashing function according to claim 1, characterized in that: The lower end of the inner side of the shell (10) is connected to a support tube (35); the discharge tube (33) is arranged at the upper end of the support tube (35) and is in communication with the inside thereof; the upper end of the support tube (35) passes through the baffle (14) and is connected to an annular plate (38); the support tube (35) is rotatably connected to the baffle (14) via the annular plate (38); the lower end of the support tube (35) passes through the shell (10) and is connected to a driving device (36); the support tube (35) is driven to rotate by the driving device (36).

3. A precision filter with backwashing function according to claim 2, characterized in that: One end of the discharge pipe (33) close to the support pipe (35) is connected to a connection block (37); the discharge pipe (33) is fixedly connected to the baffle (14) via the connection block (37); and the annular plate (38) is rotatably connected to the lower end of the connection block (37).

4. A precision filter with backwashing function according to claim 2, characterized in that: The side of the support tube (35) is connected to a fixed tube (32); the outer end of the fixed tube (32) is fixedly connected to the lower end of the receiving hopper (31); and the interiors of the fixed tube (32) and the support tube (35) are in communication.

5. The precision filter with backwashing function according to claim 1, characterized in that: The baffle plate (14) is provided with a plurality of connection grooves (25) matching the filter element (13); the plurality of connection grooves (25) are arranged in a ring shape with the support tube (35) as the center; the baffle plate (14) is fixedly connected to the lower end of the filter element (13) via the connection grooves (25).

6. A precision filter with backwashing function according to claim 1, characterized in that: A connecting platform (39) is provided at the upper end of the receiving hopper (31); the connecting platform (39) is arranged parallel to the lower end of the pressing plate (24); and the lower end of the pressing plate (24) is in contact with the connecting platform (39).

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