CN103623631B - A kind of manual backwashing filter - Google Patents

Abstract

A manual backwashing screen filter is composed of a sewage discharge assembly, a water inlet chamber, an intermediate chamber and a filter chamber. The sewage discharge assembly includes a sewage discharge pipe, a handle, a cover and a sewage inlet. The sewage discharge pipe passes through the center of the water inlet chamber to reach the top of the filter chamber; the middle chamber is a hollow plum blossom cylindrical structure arranged symmetrically with the sewage discharge pipe as the center. The middle chamber is equipped with Sewage channel; the filter cavity is composed of a shell and a plurality of filter elements. When the filter is working, the cover is in the middle of the two openings on the bottom of the water inlet chamber, and the sewage inlet is closed by the side wall of the middle chamber. At this time, the source water enters the filter element for filtration; When designing the upper limit, rotate the handle so that the cover closes an opening on the bottom of the water inlet chamber, the sewage inlet is just connected to the sewage channel, and the filter element is in a backwashing state. The invention has the advantages of compact structure, low cost, independent backwashing of each filter element, non-stop sewage discharge, less influence on the normal operation of the system, and high working efficiency.

Description

A manual backwash screen filter

technical field

The invention belongs to the technical field of water treatment and relates to water filtering equipment, in particular to a manual backwashing screen filter.

Background technique

Mesh filter is the most widely used filter equipment in agricultural micro-irrigation system and industrial water treatment. At present, in engineering applications, the backwashing of the filter screen is mostly realized through the combination of multiple filters. There are many connecting pipelines and valves, the overall structure is relatively loose and bulky, the overall cost is high, and the local water head loss is large. Normal work is greatly affected, and work efficiency is relatively low.

Contents of the invention

The object of the present invention is to provide a screen filter with compact structure and convenient backwashing.

The technical solution adopted by the present invention is: a manual backwashing screen filter, which is composed of a sewage discharge assembly, a water inlet cavity, an intermediate cavity, and a filter cavity. The water inlet chamber is a hollow cylinder, a water inlet pipe is arranged on the water inlet chamber, a water inlet pressure gauge is arranged on the water inlet pipe, and a plurality of orifices are opened on the bottom surface of the water inlet chamber to communicate with the inlet of the filter element through the middle chamber; the middle chamber Located between the water inlet chamber and the filter chamber, the center of the middle chamber is a central cylinder, along the center of the central cylinder as the circumference evenly distributed a number of circular tube-shaped connecting channels, the inner wall of the central cylinder is in close contact with the outer wall of the sewage pipe, and the middle A plurality of cylinders arranged symmetrically in a quincunx shape around the chamber are the connection channels between the water inlet chamber and the filter element. Holes are respectively opened and communicated on the wall surface at the center connection line as a sewage channel; the filter chamber is composed of a cylindrical shell and a plurality of cylindrical filter elements, and a number of round holes are opened on the top surface of the shell as the inlet of the filter element. Water pipe, the water outlet pipe is provided with a water outlet pressure gauge, and the bottom surface of the shell seals the end of the filter element; the sewage discharge assembly includes a sewage discharge pipe, a handle, a cover and a sewage inlet, and the sewage discharge pipe passes through the center of the water inlet chamber from the outside of the water inlet chamber. The top surface of the sewage pipe and the bottom surface of the filter chamber reach the top surface of the filter chamber. The end of the sewage pipe that is in contact with the top surface of the filter chamber is a closed end. The handle is located on the sewage pipe outside the water inlet chamber, and the cover is located on the sewage pipe inside the water inlet chamber and is in close contact with the bottom surface of the water inlet chamber. The cover is a circular plate with a diameter larger than the inner diameter of the connecting channel.

In the backwashing screen filter, the number of openings on the bottom surface of the water inlet chamber and the number of cylinders around the middle chamber are the same as the number of filter elements, and it is more reasonable to set the number to 2-12.

As for the backwashing screen filter, turning the handle can make the sewage discharge assembly rotate along the central axis as a whole. The direction of the cover and the sewage inlet is consistent, and the axial center section coincides. When the cover is rotated to the position between the two openings on the bottom of the water inlet chamber, the filter element inlet is fully open, and the sewage inlet is just covered by the central cylinder of the middle chamber. The inner wall of the body is closed, the sewage channel is closed, and the filter elements are all in the filtering state. When the center of the cover rotates to coincide with the center of an opening on the bottom surface of the water inlet chamber, the inlet of the filter element at that place is sealed by the cover, and the sewage inlet just coincides with the sewage discharge channel at this place, and the sewage discharge channel is opened, where the filter element is in reverse flush state. When the filter is working, all filter elements are in the filtering state. When the filter is backwashed, only one filter element is in the backwashing state, and the other filter elements are in the filtering state.

There are four assembly schemes for the backwashing screen filter, the water inlet pipe and the water outlet pipe: the first scheme, the water inlet pipe is located on the side circumference of the water inlet chamber, and the water outlet pipe is located on the side circumference of the housing. In the second solution, the water inlet pipe is located on the side circumference of the water inlet chamber, and the water outlet pipe is located on the bottom surface of the shell. In the third scheme, the water inlet pipe is located on the top surface of the water inlet chamber, and the water outlet pipe is located on the bottom surface of the casing. In the fourth solution, the water inlet pipe is located on the top surface of the water inlet chamber, and the water outlet pipe is located on the side circumference of the casing. When constructing a backwash filter, one of the four options can be selected.

When the backwashing screen filter is in operation, the cover of the sewage discharge assembly is in the middle of the two openings on the bottom surface of the water inlet chamber, and the sewage inlet is in the inner wall of the central cylinder of the middle chamber, so that the inlet of the filter element is In the fully open state, the sewage channel is closed. At this time, the source water enters the inside of the filter element for filtration, and the filtered clean water is collected between the filter element and the shell, and is output through the outlet pipe. With the increase of filtration time, the gradual accumulation of the filter screen wall and the interior of the filter element makes the pressure difference between the inlet water and the outlet water gradually increase. When the pressure difference reaches the design upper limit, turn the handle to make the sealing center of the filter assembly and If the center of an opening on the bottom of the water inlet chamber coincides, the inlet of the filter element at that place is sealed and closed, and the inlet of sewage just coincides with the sewage channel at that place. The sewage channel is opened, and the clean water between the filter element and the shell enters the filter element from the outside to the inside. , Wash the impurities accumulated on the filter screen wall and in the filter screen into the sewage pipe and discharge, where the filter element is in the backwashing state. As the filter screen is gradually cleaned, the flow rate and pressure in the sewage pipe increase. When the pressure in the sewage pipe reaches the design upper limit or when it is observed that there are few impurities in the water flow in the sewage pipe, turn the handle to backwash the next filter until all filters The net is rinsed clean, the sewage assembly rotates to the initial position, and all the filter elements return to the working state.

Beneficial effects of the structure of the present invention: the present invention makes the compact combination of multiple filters, sewage devices and water inlet chambers of the filter through the ingenious design of the sewage discharge assembly and the intermediate chamber, the overall structure of the filter is simple, and the conversion between filtration and backwashing is light and easy , Convenient, can backwash the filter element without stopping the machine and independently discharge sewage. Compared with the multi-filter combination mode, there are fewer connecting pipes, pipe fittings and valves, less water head loss, lower overall cost, less impact on the normal operation of the system, and high work efficiency.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a front sectional view of the filter core in the filtering state of Example 1 of the present invention.

Fig. 2 is a sectional view along A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

Fig. 4 is a C-C sectional view of Fig. 1 .

Fig. 5 is a D-D sectional view of Fig. 1 .

Fig. 6 is a front sectional view of the filter assembly in Fig. 1 .

Fig. 7 is a sectional view along line E-E of Fig. 6 .

Fig. 8 is a sectional view taken along line F-F of Fig. 6 .

Fig. 9 is a G-G sectional view of Fig. 6 .

Fig. 10 is a front sectional view of the filter element in the backwashing state of Example 1 of the present invention.

Fig. 11 is a H-H sectional view of Fig. 10 .

Fig. 12 is an I-I sectional view of Fig. 10 .

Fig. 13 is a front sectional view of the filter element in the filtering state of Example 2 of the present invention.

In the figure, Ⅰ. Sewage assembly Ⅱ. Water inlet chamber Ⅲ. Intermediate chamber Ⅳ. Filter chamber 1. Sewage pipe 2. Handle 3. Cover 4. Sewage inlet 5. Sewage channel 6. Filter element 7. Shell 8. Water inlet pipe 9 . Water inlet pressure gauge 10. Outlet pipe 11. Outlet water pressure gauge 12. Sewage water pressure gauge 13. Central cylinder 14. Connection channel.

Detailed ways

Example 1:

Refer to Fig. 1 to Fig. 9 . A manual backwash screen filter, which is composed of a sewage discharge assembly I, a water inlet chamber II, an intermediate chamber III, and a filter chamber IV; the water inlet chamber II is a hollow cylinder, and the water inlet chamber II is provided with a water inlet pipe 8 , the water inlet pipe 8 is provided with a water inlet pressure gauge 9, and three orifices are opened on the bottom of the water inlet chamber II to communicate with the inlets of the three filter elements 6 through the middle chamber III; the middle chamber III is set between the water inlet chamber II and the filter chamber IV Between them, the center of the middle chamber III is a central cylinder 13, along which the center of the central cylinder 13 is a circumference, and three circular tubular connection channels 14 are evenly distributed, and the three connection channels 14 are connected to the water inlet chamber II and the three filter elements 6. The top surfaces of the three connecting channels 14 communicate with the water inlet chamber II respectively; the filter chamber IV is composed of a cylindrical shell 7 and three cylindrical filter elements 6, and three round holes are opened on the top surface of the shell 7 as three filter elements 6 inlets, the bottom surfaces of the three connecting passages 14 communicate with the inlets of the three filter elements 6 respectively, and the axes of the three connecting passages 14 and the wall surfaces of the axis connecting the central cylinder 13 are respectively perforated and communicated, as Sewage channel 5; the housing 7 is provided with a water outlet pipe 10, the water outlet pipe 10 is provided with a water outlet pressure gauge 11, and the bottom surface of the housing 7 seals the tail end of the filter element 6; the sewage discharge assembly includes a sewage discharge pipe 1, a handle 2, and a cover 3 and the sewage inlet 4, the sewage pipe 1 is from the outside of the water inlet chamber II, passes through the top surface and the bottom surface of the water inlet chamber II center to the top surface of the filter chamber IV, and the outer wall of the sewage pipe 1 is closely connected to the inner wall of the central cylinder 13 Contact, the end of the sewage pipe 1 in contact with the top surface of the filter chamber IV is a closed end, and the side opening of the sewage pipe located in the middle chamber III is used as the sewage inlet 4, and the sewage pressure gauge 12 is set on the sewage pipe 1. The handle 2 Located on the sewage pipe 1 outside the water inlet chamber II, the cover 3 is set on the sewage pipe 1 inside the water inlet chamber II, and is in close contact with the bottom surface of the water inlet chamber II. The cover 3 is a circular plate with a diameter larger than that of the connection The inner diameter of the channel 14, the direction of the cover 3 and the sewage inlet 4 are consistent, and the axial center section coincides.

Referring to FIG. 1 , FIG. 2 and FIG. 5 , the water inlet pipe 8 is located on the side circumference of the water inlet chamber II, and the water outlet pipe 10 is located on the side circumference of the housing 7 .

Referring to Figure 10, Figure 11 and Figure 12, when the filter is working, all filter elements are in the filtering state. Referring to Fig. 9, Fig. 10 and Fig. 11, when the filter is backwashed, only one filter element is in the state of backwashing, and the other filter elements are in the state of filtering.

Specific working process: When the backwashing screen filter is working (refer to Figure 10, Figure 11 and Figure 12), the cover 3 of the sewage discharge assembly I is in the middle of the two openings on the bottom of the water inlet chamber II, and the sewage inlet 4 is in the middle The inner wall of the central cylinder of the intermediate cavity III just makes the inlet of the filter element 6 fully open and the sewage channel 5 is closed. At this time, the source water enters the inside of the filter element 6 for filtration, and the filtered water collects in the filter element 6 and the shell 7 Between, output through outlet pipe 10. With the increase of filtration time, the gradual accumulation of the filter screen wall and the inside of the filter element 6 will gradually increase the pressure difference between the inlet water and the outlet water. When the pressure difference reaches the design upper limit, turn the handle 2 (refer to Fig. and Figure 12), so that the center of the cover 3 of the filter assembly coincides with the center of an opening on the bottom of the water inlet chamber II, then the inlet of the filter element 6 is closed by the cover 3, and the sewage inlet 4 is just in line with the sewage channel 5 there. Coincidentally, the sewage channel 5 is opened, and the clean water between the filter element 6 and the shell 7 enters the filter element 6 from the outside to the inside, and the impurities accumulated on the filter screen wall and the filter screen are washed into the sewage pipe 1 and discharged, where the filter element 6 is in backwashing state. As the filter screen is gradually cleaned, the flow rate and pressure in the sewage pipe 1 increase. When the pressure in the sewage pipe 1 reaches the design upper limit or when it is observed that there are few impurities in the water flow in the sewage pipe 1, turn the handle 2 to move to the next filter. Backwash until all the filter screens are cleaned, the sewage assembly I rotates to the initial position, and the filter elements 6 all return to the working state.

Example 2:

Referring to Figure 13, Embodiment 2 is a manual backwashing screen filter, the basic structural features are similar to Embodiment 1, the difference is that the water inlet pipe 8 is located on the side circumference of the water inlet chamber II, and the water outlet pipe 10 is located on the bottom surface of the shell 7 . Parts of Embodiment 2 having the same structure as Embodiment 1 are denoted by the same reference numerals and will not be described again. The principle and implementation process of this embodiment are also the same as those of the first embodiment, so the description thereof is omitted.

The structure and principle of the backwash screen filter of the present invention have been fully disclosed through the embodiments, but the embodiments are not intended to limit the present invention, and there are other embodiments without departing from the spirit or basic characteristics of the present invention. DETAILED DESCRIPTION OF THE INVENTION Reference should be made to the appended claims, rather than to the foregoing description, as indicating the scope of the invention.

Claims (5)

1. a manual backwashing filter, is characterized in that, is made up of blowdown assembly (I), intake antrum (II), intermediate cavity (III), filter chamber (IV), described intake antrum (II) is hollow cylinder, intake antrum (II) is provided with water inlet pipe (8), water inlet pipe (8) is arranged inlet gage (9), and aperture is offered by the inlet communication of intermediate cavity (III) with filter core (6) in intake antrum (II) bottom surface, described intermediate cavity (III) is located between intake antrum (II) and filter chamber (IV), cylinder (13) centered by the center of intermediate cavity (III), centrally the center of cylinder (13) is that even circumferential distributes the interface channel (14) of more than 2 circular tube shapeds, described interface channel (14) connects intake antrum (II) and filter core (6), and the end face of more than 2 interface channels (14) is communicated with intake antrum (II) respectively, described filter chamber (IV) is made up of cylinder blanket (7) and more than 2 cylindrical filter cartridge (6), shell (7) end face opens the import of more than 2 circular holes as filter core (6), the bottom surface of more than 2 interface channels (14) respectively with 2 with the inlet communication of upper filter (6), the axle center of more than 2 interface channels (14) and perforate being communicated with, as drain outlet (5) respectively on the wall at the axial connecting line place of central cylinder (13), described shell (7) is provided with outlet pipe (10), outlet pipe (10) sets out water pressure table (11), filter core (6) tail end is closed by shell (7) bottom surface, described blowdown assembly comprises blow-off pipe (1), handle (2), capping (3) and wastewater inlet (4), described blow-off pipe (1) is outside from intake antrum (II), filter chamber (IV) end face is arrived through its end face and bottom surface by intake antrum (II) center, the outer wall of blow-off pipe (1) and the inwall close contact of central cylinder (13), one end that blow-off pipe (1) contacts with filter chamber (IV) end face is blind end, blow-off pipe is positioned at the pipeline section lateral opening hole of intermediate cavity (III) as wastewater inlet (4), blow-off pipe (1) is arranged sewer Pressure gauge (12), described handle (2) is positioned on the outside blow-off pipe (1) of intake antrum (II), capping (3) is located on the inner blow-off pipe (1) of intake antrum (II), and with intake antrum (II) bottom surface close contact, capping (3) is circular slab, its diameter is greater than the internal diameter of interface channel (14), capping (3) is consistent with the direction of wastewater inlet (4), axial centre section overlaps, the quantity of the quantity of intake antrum (II) bottom surface perforate, the interface channel (14) of intermediate cavity (III) peripheral circular tube shaped is identical with the quantity of filter core (6), turning handle (2) makes blowdown assembly (I) entirety rotate along central shaft, when capping (3) rotates the position to intake antrum (II) bottom surface in the middle of two perforates, filter core (6) import is full-gear, and wastewater inlet (4) is just closed by the inwall of the central cylinder of intermediate cavity (III), drain outlet (5) is closed, and filter core (6) is all in filtration condition, when the central rotation of capping (3) is to center superposition with the perforate in intake antrum (II) bottom surface, this place's filter core (6) import capped (3) is closed, wastewater inlet (4) just overlaps with the drain outlet (5) at this place, drain outlet (5) is opened, and filter core (6) is in backwash state herein, during filter work, all filter cores are all in filtration condition, during Filter Back Washing, only have a filter core to be in backwash state, other filter core is then in filtration condition.

2. a kind of manual backwashing filter according to claim 1, is characterized in that, described water inlet pipe (8) is located at the sidewall of intake antrum (II) circumferentially, and outlet pipe (10) is located at the sidewall of shell (7) circumferentially.

3. a kind of manual backwashing filter according to claim 1, is characterized in that, described water inlet pipe (8) is located at the sidewall of intake antrum (II) circumferentially, and outlet pipe (10) is located on the bottom surface of shell (7).

4. a kind of manual backwashing filter according to claim 1,2 or 3, it is characterized in that, the quantity of described intake antrum (II) bottom surface perforate, the quantity of the interface channel (14) of intermediate cavity (III) peripheral circular tube shaped and the quantity of filter core (6) are 2-12.

5. a kind of manual backwashing filter according to claim 1,2 or 3, it is characterized in that, the quantity of described intake antrum (II) bottom surface perforate, the quantity of the interface channel (14) of intermediate cavity (III) peripheral circular tube shaped and the quantity of filter core (6) are three.