CN217988533U - Bag filter capable of backwashing - Google Patents

Abstract

The utility model discloses a bag filter capable of backwashing, which comprises an outer shell, a water inlet pipe arranged at the upper end of the outer shell, a water outlet pipe arranged at the bottom of the lower end of the outer shell, a blow-off pipe is arranged on the side wall of the top of the outer shell, a water purification pipe is connected at the water outlet end of the water outlet pipe, a flushing pipe is communicated between the water inlet pipe and the water outlet pipe, control valves for controlling the on-off of water are arranged on the water inlet pipe, the water outlet pipe, the blow-off pipe and the flushing pipe, an upper cavity body and a lower cavity body communicated with the upper cavity body are arranged in the outer shell, the water inlet pipe and the blow-off pipe are communicated with the upper cavity body, the water outlet pipe is communicated with the lower cavity body, a detachable flexible filter bag is arranged in the lower cavity body, a space for accommodating the flexible filter bag is arranged in the upper cavity body, and the flexible filter bag can enter when backwashing is carried out; the utility model discloses it is internal to enable flexible filter bag and enter into the epicoele from the cavity down, and water gets into from the outer wall of flexible filter bag and carries out the back flush, makes impurity and sewage discharge through the blow off pipe, reaches clean effect.

Description

Bag filter capable of backwashing

Technical Field

The utility model relates to a water filter technical field especially relates to a bag filter of ability back flush.

Background

The bag filter can be used for intercepting impurities such as silt, particles or suspended matters in water, but water can pass through a plurality of water through holes arranged on the filter bag, so that the water purification effect is realized, and the filtered water flows out of the water purification pipe.

After the bag filter is used for a period of time, a large amount of impurities such as silt, particles or suspended matters and the like can be intercepted in the filter bag; and because the diameter of the water through hole arranged on the filter bag is smaller and can be set to be 0.1-0.3 micron, the water through hole is easy to be blocked, so that the water filtering effect is worse and worse, and finally, the water filtering device cannot work. Traditional bag filter does not set up back flush unit, so can only adopt the mode of often changing the filter bag to improve the filter effect, use cost is higher, and the operation is comparatively loaded down with trivial details.

SUMMERY OF THE UTILITY MODEL

In order to solve one of the above-mentioned technical problem that exists in the correlation technique to a certain extent, the utility model provides a bag filter of ability back flush, it enables that flexible filter bag enters into the epicoele from the cavity down internally, and water gets into from the outer wall of flexible filter bag and carries out the back flush, makes impurity and sewage discharge through the blow off pipe, reaches clean effect.

The utility model provides a bag filter that can back flush, which comprises an outer shell, the inlet tube of setting in the shell upper end, the outlet pipe of setting in shell lower extreme bottom, top lateral wall at the shell still is provided with the blow off pipe, outlet end at the outlet pipe is connected with the water purification pipe, at the inlet tube, the intercommunication has the flushing pipe between the outlet pipe, at the inlet tube, the outlet pipe, the blow off pipe, all be provided with the control valve that is used for controlling the water break-make on the flushing pipe, be provided with the cavity in the shell, with the lower cavity of last cavity intercommunication, the inlet tube, blow off pipe and last cavity intercommunication, the outlet pipe communicates with lower cavity, install the flexible filter bag that can dismantle in the cavity down, also have the space that holds flexible filter bag in the cavity, supply flexible filter bag to get into when back flush.

Further, the shell includes the epitheca, can dismantle the inferior valve of being connected with the epitheca, and the connecting portion cover of epitheca and inferior valve is equipped with the sealing washer, goes up the cavity, the cavity correspondence is formed in epitheca, inferior valve down.

Furthermore, a connecting ring is arranged at the upper end of the lower shell, and an annular groove is formed in the connecting ring; the upper end of the flexible filter bag is provided with a positioning ring, the lower end of the positioning ring is provided with a positioning convex ring, the positioning convex ring can be embedded into the annular groove, and the positioning ring can be in contact with the connecting ring surface and is sealed.

Furthermore, a water pressure gauge is arranged at the water inlet end of the water inlet pipe.

Furthermore, a plurality of water through holes are regularly formed on the flexible filter bag, and the diameter of each water through hole is 0.1-0.3 micron.

The utility model has the advantages that: have the back flush function, it enables the flexible filter bag and enters into the epicoele from the cavity down internally to make the internal surface upset of flexible filter bag become the surface, water gets into from the former outer wall of flexible filter bag and carries out the back flush, makes impurity and sewage discharge through the blow off pipe, reaches clean effect, improves water filter effect and efficiency, need not often to change the flexible filter bag of crossing, prolongs the flexible life who crosses the bag, and the cost is lower relatively, and the filter effect is better, and filtration efficiency is higher.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of the filter of the present invention;

FIG. 2 is a schematic structural view of the utility model in a back-washing state;

FIG. 3 is an enlarged view at A in FIG. 1;

FIG. 4 is a schematic cross-sectional view of the flexible filter bag of the present invention;

fig. 5 is a schematic structural diagram of the housing of the present invention.

Detailed Description

The following description will further explain embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1-5, a bag filter capable of backwashing comprises a housing 1, a water inlet pipe 2 arranged at the upper end of the housing 1, and a water outlet pipe 3 arranged at the bottom of the lower end of the housing 1, wherein a sewage discharge pipe 4 is further arranged on the side wall of the top of the housing 1, a water purification pipe 5 is connected at the water outlet end of the water outlet pipe 3, a flushing pipe 6 is communicated between the water inlet pipe 2 and the water outlet pipe 3, a control valve 7 for controlling the on-off of water is arranged on each of the water inlet pipe 2, the water outlet pipe 3, the sewage discharge pipe 4 and the flushing pipe 6, an upper cavity 8 and a lower cavity 9 communicated with the upper cavity 8 are arranged in the housing 1, the water inlet pipe 2 and the sewage discharge pipe 4 are communicated with the upper cavity 8, the water outlet pipe 3 is communicated with the lower cavity 9, a detachable flexible filter bag 10 is arranged in the lower cavity 9, a space for accommodating the flexible filter bag 10 is also arranged in the upper cavity 8, and the flexible filter bag 10 can enter the space when backwashing is carried out.

The shell 1 comprises an upper shell 11 and a lower shell 12 which can be detachably connected with the upper shell 11, can be in a hinged or threaded connection structure and the like, and adopts a detachable connection structure to facilitate the replacement of the flexible filter bag 10; at the connecting portion cover of epitheca 11 with inferior valve 12 and be equipped with sealing washer 13, prevent that water from overflowing, go up cavity 8, lower cavity 9 and correspond and be formed in epitheca 11, inferior valve 12.

A connecting ring 14 is arranged at the upper end of the lower shell 12, and an annular groove 15 is arranged on the connecting ring 14; the upper end of the flexible filter bag 10 is provided with a positioning ring 16, the lower end of the positioning ring 16 is concentrically provided with a positioning convex ring 17, the positioning convex ring 17 is embedded in the annular groove 15, and the positioning ring 16 can be in surface contact with the connecting ring 14 and is sealed to prevent water overflow. The flexible filter bag 10 adopts the detachable structure, is convenient and quick to install and replace, has good sealing effect, and can be additionally provided with sealing elements at the connecting parts of the positioning ring 16 and the upper shell 11 and the lower shell 12 in order to improve the sealing effect.

A water pressure gauge 18 is arranged at the water inlet end of the water inlet pipe 2. It is convenient to look at the pressure of the water when the filter is in the filtration state and to indicate that the filter needs to be cleaned when the pressure indicated on the water gauge 18 exceeds the normal value.

A plurality of water through holes 19 are regularly formed on the flexible filter bag 10, and the diameter of each water through hole 19 is 0.1-0.3 micron. According to the filtering precision requirement, the flexible filter bags 10 with different specifications can be replaced, the flexible filter bags 10 can be made of polyester fibers, polypropylene fibers, cloth or other fiber materials, and the flexibility is a relatively rigid material, namely a material with certain softness and flexibility.

The working principle is as follows: when the filter is in a filtering state, the control valves 7 arranged on the flushing pipe 6 and the sewage discharge pipe 4 are closed, and the control valves 7 arranged on the water inlet pipe 2 and the purified water pipe 5 are opened. Water to be treated enters an upper cavity 8 and a lower cavity 9 which are arranged in a shell 1 from a water inlet pipe 2, the water is filtered and purified after passing through a flexible filter bag 10, the purified water flows out through a water outlet pipe 3 and a purified water pipe 5 in sequence, and the flow path of the water is A1-A2-A3-A4-A5. The impurities are trapped inside the flexible filter bag 10.

When the pressure indicated on the water pressure gauge 18 exceeds a predetermined value, it indicates that the flexible filter bag 10 has a large amount of impurities and needs to be cleaned, but may be cleaned at any time as needed. When the filter is in a back flushing state, the control valves 7 arranged on the flushing pipe 6 and the sewage discharge pipe 4 are opened, and the control valves 7 arranged on the water inlet pipe 2 and the purified water pipe 5 are closed. The pressurized water sequentially enters a lower cavity 9 arranged in the shell 1 through a flushing pipe 6 and a water outlet pipe, the flexible filter bag 10 moves from the lower cavity 9 to an upper cavity 8 under the impact of the water and finally completely enters the upper cavity 8 and is unfolded, at the moment, the original inner wall of the flexible filter bag 10 is changed into an outer wall, impurities attached to the bag wall and the water through hole 19 or in the flexible filter bag 10 are flushed by the water and finally discharged from the sewage discharge pipe 4, the back flushing effect is realized, and the flow path of the water is B1-B2-B3-B4-B5.

It should be noted that: in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it is to be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. The utility model provides a bag filter of ability back flush, includes the shell, sets up inlet tube, the outlet pipe of setting at the shell lower extreme in the shell upper end, characterized by: still be provided with the blow off pipe at the top lateral wall of shell, the play water end at the outlet pipe is connected with the water purification pipe, at the inlet tube, the intercommunication has the flushing pipe between the outlet pipe, at the inlet tube, the outlet pipe, the blow off pipe, all be provided with the control valve that is used for controlling the water break-make on the flushing pipe, be provided with the cavity in the shell, with the lower cavity of last cavity intercommunication, the inlet tube, the blow off pipe communicates with last cavity, outlet pipe and lower cavity intercommunication, install the flexible filter bag that can dismantle in the cavity down, the internal space that holds the flexible filter bag that also has of epicoele, supply the flexible filter bag to get into when carrying out the back flush.

2. The backflushable bag filter of claim 1, wherein: the shell includes the epitheca, can dismantle the inferior valve of being connected with the epitheca, and the connecting portion cover of epitheca and inferior valve is equipped with the sealing washer, goes up cavity, lower cavity and corresponds to be formed in epitheca, inferior valve.

3. The backflushable bag filter of claim 2, wherein: the upper end of the lower shell is provided with a connecting ring, and the connecting ring is provided with an annular groove; the upper end of the flexible filter bag is provided with a positioning ring, the lower end of the positioning ring is provided with a positioning convex ring, the positioning convex ring can be embedded into the annular groove, and the positioning ring can be in contact with the connecting ring surface and is sealed.

4. A backflushable bag filter according to claim 3, wherein: a water pressure gauge is arranged at the water inlet end of the water inlet pipe.

5. The backflushable bag filter of claim 1, wherein: a plurality of water through holes are regularly formed on the flexible filter bag, and the diameter of each water through hole is 0.1-0.3 micron.

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