CN210645349U - Filter back flush ware and have its spraying system - Google Patents

Abstract

The utility model provides a filtering back-flushing device, which comprises a first filter, a second filter, a first water supply valve, a second water supply valve, a water suction pump, a water supply pipe, a water supply main valve, a first flushing valve, a second flushing valve and a flushing main valve, wherein the first filter is connected with the water inlet of the water suction pump after passing through the first water supply valve, the second filter is connected with the water inlet of the water suction pump after passing through the second water supply valve, and the water outlet of the water suction pump is connected with one end of the water supply pipe; the water supply main valve is arranged on the water supply pipe; the first filter is also connected with a water supply pipe after passing through the first flushing valve and the flushing main valve in sequence; the second filter is also connected with a water supply pipe after passing through the second flushing valve and the flushing main valve in sequence. The filtering and backwashing device has the functions of filtering and backwashing, and is not required to be detached from the fertilizer water pool before being flushed, and is not required to be additionally connected with a set of flushing equipment and additionally search for a clean water source, so that the use is more convenient. The utility model also provides a spraying system with this filter back flush ware.

Description

Filter back flush ware and have its spraying system

Technical Field

The utility model relates to a filtration equipment, concretely relates to filter back flush ware and have its spraying system.

Background

The fertilizer and water integrated technology is an advanced cost-saving and efficiency-increasing practical technology, fertilizer and water are mixed in a fertilizer and water pool according to a preset proportion to form fertilizer and water, and then the fertilizer and water are conveyed to a spraying device at a planting field through a water suction pump, so that watering and fertilizing are carried out simultaneously. In use, water in the fertilizer water pool is usually extracted from water sources such as rivers, pools and the like near the planting field, and external impurities such as soil, leaves and the like are inevitably present. When irrigating, in order to avoid the impurity in the fertilizer water pool from blocking the spraying device, a filtering device is usually arranged in the fertilizer water pool so as to filter the fertilizer water before entering the spraying device. The filter device is easy to block after being used for a period of time, and at the moment, the blocked filter device needs to be cleaned so that the filter device can be recovered to be used. In the prior art, when a filtering device is cleaned, another set of flushing equipment is required to be connected, the flushing equipment generally comprises a flushing head, a flushing main pipeline connected with the flushing head and a water pump connected with the flushing main pipeline, and during cleaning, a clean water source is pumped to the flushing head through the water pump so as to flush the filtering device. And in field operation, the difficulty of finding a clean water source is difficult. If the filtering device is blocked in the irrigation process, the filtering device must be detached from the fertilizer pool before the filtering device is flushed in order to prevent the influence on the mixing ratio of the fertilizer and the water in the flushing process, so that the whole cleaning process is troublesome.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving one of above-mentioned technical problem at least, provides a filter back flush ware, and it has the function of filtration and back flush, and need not to tear out from the rich water pond before the filter washes, and it is comparatively convenient to use.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

a filtering back-flushing device comprises a first filter, a second filter, a first water supply valve, a second water supply valve, a water suction pump, a water supply pipe, a water supply main valve, a first flushing valve, a second flushing valve and a flushing main valve, wherein the first filter is connected with a water inlet of the water suction pump after passing through the first water supply valve; the water supply main valve is arranged on the water supply pipe to control the on-off of the water supply pipe; the first filter is also connected with the water supply pipe after passing through the first flushing valve and the flushing main valve in sequence; the second filter is also connected with the water supply pipe after passing through the second flushing valve and the flushing main valve in sequence.

Furthermore, the filtering back-flushing device comprises a water pumping pipe, a first water pumping branch pipe and a second water pumping branch pipe, wherein the first water pumping branch pipe and the second water pumping branch pipe are formed by branching one end of the water pumping pipe, the free tail end of the water pumping pipe is connected with a water inlet of the water pumping pump, the free tail end of the first water pumping branch pipe is connected with the first filter, and the free tail end of the second water pumping branch pipe is connected with the second filter; the first water supply valve is installed on the first water pumping branch pipe, and the second water supply valve is installed on the second water pumping branch pipe.

Furthermore, the filtering back-flushing device comprises a flushing main pipe, a first flushing branch pipe and a second flushing branch pipe which are formed by branching one end of the flushing main pipe, the free tail end of the flushing main pipe is connected with the water supply pipe, the free tail end of the first flushing branch pipe is connected with the first pumping branch pipe, and the junction of the first branch flushing pipe and the first branch pumping pipe is positioned between the first filter and the first water supply valve, the free end of the second branch flushing pipe is connected with the second branch pumping pipe, and the junction of the second flushing branch pipe and the second pumping branch pipe is positioned between the second filter and the second water supply valve, the first flushing valve is arranged on the first flushing branch pipe, the second flushing valve is arranged on the second flushing branch pipe, and the flushing main valve is arranged on the flushing main pipe.

Furthermore, the joint of the flushing main pipe and the water supply pipe is positioned between the water suction pump and the water supply main valve, and the water suction pump is an adjustable pressure pump.

Furthermore, the first filter and the second filter both comprise filter boxes, the filter boxes are formed by assembling box body filter screens, the box body filter screens are metal meshes, connecting holes are formed in the side walls which surround the filter boxes in a penetrating manner, and the connecting holes are communicated with the inner cavities of the filter boxes and the outside; the free tail end of the first water pumping branch pipe extends into the first filter through the connecting hole of the first filter; the free tail end of the second water pumping branch pipe extends into the second filter through the connecting hole of the second filter; and pipeline filter screens are respectively arranged in the first water pumping branch pipe and the second water pumping branch pipe.

Furthermore, the first filter and the second filter both comprise a filter box and a filter pipe arranged on the filter box, and the filter box comprises a net frame and a box body filter screen which is coated outside the net frame and is connected with the net frame; a fixing hole is formed in the box body filter screen in a penetrating manner; one end of the filter pipe is fixedly connected with the screen frame of the filter box, the other end of the filter pipe is positioned in the filter box, and a pipeline filter screen is arranged in the filter pipe; the free tail end in the first water pumping branch pipe is inserted into the filter pipe of the first filter after passing through the fixing hole; the free tail end in the second water pumping branch pipe is inserted into the filter pipe of the second filter after passing through the fixing hole.

Furthermore, the first filter and the second filter both comprise a filter box and a filter pipe arranged on the filter box, and the filter box comprises a net frame and a box body filter screen which is coated outside the net frame and is connected with the net frame; a fixing hole is formed in the box body filter screen in a penetrating manner; the filter pipe penetrates through the fixing hole, and the outer peripheral wall of the filter pipe is fixedly connected with the net frame of the filter box; one end of the filter pipe is positioned in the filter box, the other end of the filter pipe is positioned outside the filter box, and a pipeline filter screen is arranged in the filter pipe; the free tail end in the first water pumping branch pipe is detachably connected with one end of the corresponding filter pipe outside the filter box; the free tail end in the second water pumping branch pipe is detachably connected with one end of the corresponding filter pipe outside the filter box.

Furthermore, the mesh number of the pipeline filter screen is larger than that of the box body filter screen.

Further, the pipeline filter screen and the box filter screen are both of a double-layer structure.

The utility model also provides a spraying system, including filtering back flush device and spray set, filtering back flush device includes first filter, second filter, first feed valve, second feed valve, suction pump, delivery pipe, water supply main valve, first flushometer, second flushometer and flushing main valve, first filter passes through behind the first feed valve with the water inlet of suction pump is connected, the second filter passes through behind the second feed valve with the water inlet of suction pump is connected, the delivery port of suction pump is connected with one end of delivery pipe, the other end of delivery pipe is connected with spray set; the water supply main valve is arranged on the water supply pipe to control the on-off of the water supply pipe; the first filter is also connected with the water supply pipe after passing through the first flushing valve and the flushing main valve in sequence; the second filter is also connected with the water supply pipe after passing through the second flushing valve and the flushing main valve in sequence.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

when the filtering back-flushing device is used, the first water supply valve and the water supply main valve are opened, other valves are closed, and at the moment, under the action of the water pump, the fertilizer water in the fertilizer water tank can be filtered by the first filter and is pumped into the water supply pipe; if the second water supply valve and the main water supply valve are opened and other valves are closed, at the moment, under the action of the water pump, the fertilizer water in the fertilizer water pool can be filtered by using the second filter, and the fertilizer water is pumped into the water supply pipe; when the first filter is cleaned, the second water supply valve, the main flushing valve and the first flushing valve are opened, other valves are closed, at the moment, under the action of the water pump, the fertilizer water in the fertilizer water tank can be filtered by the second filter, and the fertilizer water filtered by the second filter is pumped into the first filter to perform back flushing on the first filter, so that the first filter is cleaned; when wasing the second filter, open first feed water valve, wash main valve and second flush valve, close other valves, at this moment, under the effect of pump, usable first filter filters the rich water in the rich water pond to with the fertile water suction after the first filter filters to the second filter in order to carry out the recoil to the second filter, and then realize the washing to the second filter. Therefore, the filtering backwashing device has the functions of filtering and backwashing, avoids the blockage of the water spraying device, can enable the rich water to be washed by the reverse water outlet of the first filter and the second filter, does not need to detach the first filter and the second filter from the rich water pool before washing, does not need to additionally connect a set of washing equipment and additionally search a clean water source, and is convenient to use.

Drawings

Fig. 1 is a schematic structural diagram of a spraying system according to a first embodiment of the present invention.

Fig. 2 is a schematic structural view of a connection portion of a first filter and a first branch water pumping pipe in the spraying system shown in fig. 1.

Fig. 3 is a perspective view of the free end of the first branched water-extracting pipe shown in fig. 2.

Fig. 4 is a schematic structural view of a junction between the first filter and the first pumping branch pipe according to the second embodiment of the present invention.

FIG. 5 is a perspective view of the junction of the free end of the first branched water suction pipe and the filtering pipe shown in FIG. 4.

Fig. 6 is a schematic structural view of a junction between the first filter and the first branched water pumping pipe according to the third embodiment of the present invention.

Description of the main elements

100-spraying system, 200-filtering back-flushing device, 30-first filter, 31-second filter, 32-first water supply valve, 33-second water supply valve, 34-water suction pump, 35-water supply pipe, 36-water supply main valve, 37-first flushing valve, 38-second flushing valve, 39-flushing main valve, 41-water suction pipe, 43-first pumping branch pipe, 45-second pumping branch pipe, 51-flushing main pipe, 53-first flushing branch pipe, 55-second flushing branch pipe, 61-filtering box, 631-net frame, 632-box filtering net, 634-fixing hole, 62-connecting hole, 7-pipeline filtering net, 8-filtering pipe, 400-spraying device and 500-fertilizer water tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a first embodiment of the present invention provides a spraying system 100, which includes a filtering backwash device 200 and a spraying device 400, wherein the filtering backwash device 200 is installed at a fertilizer pool 500 and connected to the spraying device 400 to filter fertilizer water in the fertilizer pool 500 and transmit the filtered fertilizer water to the spraying device 400; the spraying device 400 is used for irrigating the fertilizer water transmitted by the filtering and backwashing device 200 to the planting field. The spraying device 400 may include a pipe disposed at the planting field, spray heads spaced apart from the pipe, etc., which are known in the art and will not be described in detail herein for brevity.

The filtering backflusher 200 includes a first strainer 30, a second strainer 31, a first water supply valve 32, a second water supply valve 33, a suction pump 34, a water supply pipe 35, a water supply main valve 36, a first flush valve 37, a second flush valve 38, and a flush main valve 39. The first filter 30 is connected with the water inlet of the water pump 34 after passing through the first water supply valve 32, the second filter 31 is connected with the water inlet of the water pump 34 after passing through the second water supply valve 33, the water outlet of the water pump 34 is connected with one end of a water supply pipe 35, and the other end of the water supply pipe 35 is connected with the pipeline of the spraying device 400; a water supply main valve 36 is installed on the water supply pipe 35 to control the on/off of the water supply pipe 35; the first filter 30 is connected to the water supply pipe 35 after passing through the first flush valve 37 and the flush main valve 39 in sequence; the second strainer 31 is connected to the water supply pipe 35 after passing through a second flush valve 38 and a flush main valve 39 in this order.

The first filter 30 is connected to the water inlet of the water pump 34 through the first water supply valve 32, and the second filter 31 is connected to the water inlet of the water pump 34 through the second water supply valve 33, specifically: the filtering and backwashing device 200 includes a water pumping pipe 41, and a first water pumping branch pipe 43 and a second water pumping branch pipe 45 formed by branching one end of the water pumping pipe 41; the free end of the water pumping pipe 41 is connected with the water inlet of the water pumping pump 34, and the free end of the first water pumping branch pipe 43 is connected with the first filter 30; the free end of the second branched water-drawing pipe 45 is connected to the second filter 31; the first water supply valve 32 is attached to the first water pumping branch pipe 43, and the second water supply valve 33 is attached to the second water pumping branch pipe 45.

The first filter 30 is connected to the water supply pipe 35 after passing through the first flush valve 37 and the flush main valve 39 in sequence, and the second filter 31 is connected to the water supply pipe 35 after passing through the second flush valve 38 and the flush main valve 39 in sequence, specifically: the filtering back-flushing device 200 comprises a flushing main pipe 51, a first flushing branch pipe 53 and a second flushing branch pipe 55 which are formed by branching one end of the flushing main pipe 51, wherein the free tail end of the flushing main pipe 51 is connected with the water supply pipe 35, and in the embodiment, the connection position of the flushing main pipe 51 and the water supply pipe 35 is positioned between the water suction pump 34 and the water supply main valve 36; the free end of the first flushing branch pipe 53 is connected to the first pumping branch pipe 43, and the connection between the first flushing branch pipe 53 and the first pumping branch pipe 43 is located between the first filter 30 and the first water supply valve 32; the free end of the second flushing branch pipe 55 is connected to the second pumping branch pipe 45, and the connection between the second flushing branch pipe 55 and the second pumping branch pipe 45 is located between the second filter 31 and the second water supply valve 33; the first flush valve 37 is provided in the first branch flush pipe 53, the second flush valve 38 is provided in the second branch flush pipe 55, and the main flush valve 39 is provided in the main flush pipe 51.

Preferably, the water pump 34 is a pressure pump with adjustable pressure, and the first water supply valve 32, the second water supply valve 33, the main water supply valve 36, the first flushing valve 37, the second flushing valve 38 and the main flushing valve 39 are all ball valves; it is understood that in other embodiments, other types of pumps may be used for the water pump 34, and other types of valves may be used for the first water supply valve 32, the second water supply valve 33, the water supply main valve 36, the first flush valve 37, the second flush valve 38, and the flush main valve 39.

Referring to fig. 2 and 3, in the present embodiment, each of the first filter 30 and the second filter 31 includes a filter box 61, and the filter box 61 has a substantially hollow cylindrical frame structure. Preferably, the filtering box 61 is assembled by using a box filter screen 632, and the box filter screen 632 is a metal filter screen, which is assembled by welding or the like to form the filtering box 61. The side wall of the filter box 61 is penetrated with a connecting hole 62. The first branched water pumping pipe 43 and the first filter 30 may be fixedly connected by welding, etc., and the free end of the first branched water pumping pipe 43 extends into the first filter 30 through the connection hole 62 of the first filter 30; the second branched water-drawing pipe 45 is fixedly connected to the second filter 31, and a free end of the second branched water-drawing pipe 45 extends into the second filter 31 through the connection hole 62 of the second filter 31. In the present embodiment, the duct screen 7 is further installed in both the first branch water suction pipe 43 and the second branch water suction pipe 45. Preferably, the metal filter screen of the box filter screen 632 and the pipeline filter screen 7 are both of a double-layer structure, and the mesh number of the pipeline filter screen 7 is larger than that of the box filter screen 632; the pipe screen 7 is disposed near the free end of the first or second pumping branch pipe 43 or 45 so as to facilitate assembly and improve the filtering effect. During the use, carry out primary filter to getting into first filter 30 and second filter 31 rich water through the filtration pore pair on box filter screen 632, the filtration pore pair rich water on the pipeline filter screen 7 carries out secondary filter again, can make its filtration to rich water more thoroughly through secondary filter. Preferably, the pipe screen 7 and the box screen 632 are made of corrosion-resistant and rust-proof metal materials.

It is to be understood that the shape and structure of the first filter 30 and the second filter 31 are not limited to those of the present embodiment, and for example, in other embodiments, the shape of the first filter 30 and the second filter 31 may be a hollow cube, a rectangular parallelepiped box, or the like. For another example, referring to fig. 4 and 5, in the second embodiment, each of the first filter 30 and the second filter 31 includes a filter box 61 and a filter pipe 8 installed on the filter box 61. The filtering box 61 is a hollow frame structure, and includes a frame 631 and a box filter screen 632 covering the frame 631 and connected to the frame 631, wherein the filtering holes of the box filter screen 632 communicate with the inner cavity of the filtering box 61 and the outside. Preferably, the mesh frame 631 is made of stainless steel, and the tank filter 632 is made of corrosion-resistant metal material or other material, such as nylon filter; the box filter screen 632 can be fixed with the screen frame 631 by welding or fixed outside the screen frame 631 by a binding rope so as to be conveniently disassembled and replaced. The box filter 632 has a fixing hole 634 formed therethrough. One end of the filtering pipe 8 is fixedly connected with the net frame 631 of the filtering tank 61, and the other end is positioned in the filtering tank 61. The pipe orifice of the filtering pipe 8 at one end in the filtering box 61 is also provided with a pipe screen 7. The free end of the first branched water pumping pipe 43 is inserted into the filtering pipe 8 of the first filter 30 via the fixing hole 634, and is detachably connected with the filtering pipe 8 of the first filter 30 by a screw thread connection or the like. The free end of the second branch pumping pipe 45 is inserted into the filtering pipe 8 of the second filter 31 via the fixing hole 634, and is detachably connected with the filtering pipe 8 of the second filter 31 by a screw thread connection or the like.

Referring to fig. 6, in the third embodiment, each of the first filter 30 and the second filter 31 includes a filter box 61 and a filter pipe 8 installed on the filter box 61, and the filter box 61 has the same structure as that of the second embodiment, and includes a mesh frame 631 and a box filter 632 wrapped outside the mesh frame 631 and connected to the mesh frame 631, except that: in the present embodiment, the filter tube 8 is formed with the fixing hole 634, and the outer peripheral wall of the filter tube 8 is fixedly connected to the mesh frame 631 of the filter box 61. One end of the filter pipe 8 is located inside the filter tank 61, and the other end is located outside the filter tank 61. The pipe orifice of the filtering pipe 8 at one end in the filtering box 61 is also provided with a pipe screen 7. The free end of the first branch water pumping pipe 43 is detachably connected with one end of the corresponding filtering pipe 8 outside the filtering tank 61 through a threaded connection and the like. The free end of the second branch water pumping pipe 45 is detachably connected with one end of the corresponding filtering pipe 8 outside the filtering tank 61 through a threaded connection and the like. By adopting the structures of the first filter 30 and the second filter 31 in the second embodiment and the third embodiment, the first filter 30 and the second filter 31 can be conveniently detached, so that the maintenance of subsequent equipment is facilitated.

When the filtering function is used, the fertilizer water can be filtered by any filter, for example, when the water is fed by the first filter 30, the first water supply valve 32 and the water supply main valve 36 are opened, the second water supply valve 33, the first flushing valve 37, the second flushing valve 38 and the flushing main valve 39 are closed, the pressure of the water suction pump 34 can be adjusted according to the spraying requirement, under the action of the water suction pump 34, the fertilizer water sequentially passes through the filtering holes of the filtering box 61 of the first filter 30 and the filtering holes of the pipeline filtering net 7 and then enters the first water suction branch pipe 43, in the process, impurities are blocked outside the box filtering net 632 and the pipeline filtering net 7 of the filtering box 61, and the filtered fertilizer water sequentially passes through the water suction pipe 41, the water suction pump 34 and the water supply pipe 35 and then enters the spraying device 400 for irrigation; when water is fed through the second filter 31, the second water supply valve 33 and the water supply main valve 36 are opened, the first water supply valve 32, the first flushing valve 37, the second flushing valve 38 and the flushing main valve 39 are closed, under the action of the water suction pump 34, the fertilizer water sequentially passes through the filtering holes of the filtering box 61 of the second filter 31 and the filtering holes of the pipeline filtering net 7 and then enters the second water suction branch pipe 45, in the process, impurities are blocked outside the box filtering net 632 of the filtering box 61 and the pipeline filtering net 7, and the filtered fertilizer water sequentially passes through the water suction pipe 41, the water suction pump 34 and the water supply pipe 35 and then enters the spraying device 400 for irrigation.

After using first filter 30 or second filter 31 for a period of time, will adsorb impurity on its box filter screen 632 and the pipeline filter screen 7, and accessible adjustment corresponding valve lets water reverse outflow, reaches the effect of washing the filter. When the backwashing function is used, if the first filter 30 is to be flushed, the second water supply valve 33, the flushing main valve 39 and the first flushing valve 37 are opened, and the first water supply valve 32, the second flushing valve 38 and the water supply main valve 36 are closed, at this time, the fertilizer water can enter from the second filter 31 and flush out from the first filter 30, so as to flush out the impurities adsorbed on the filter screen 632 of the tank body of the first filter 30 and the pipeline filter screen 7, specifically: the rich water filtered by the second strainer 31 sequentially passes through the second branched water pumping pipe 45, the water pumping pipe 41, the water pumping pump 34, the water supply pipe 35, the flushing header pipe 51, the first branched flushing pipe 53, and the first branched water pumping pipe 43, enters the first strainer 30, and is back flushed from the inside of the first strainer 30. When the second filter 31 is to be washed, the first water supply valve 32, the second flush valve 38 and the main flush valve 39 are opened, and the second water supply valve 33, the first flush valve 37 and the main water supply valve 36 are closed, at this time, the fertilizer water can enter from the first filter 30 and exit from the second filter 31, so as to achieve the function of washing the impurities adsorbed on the box filter screen 632 and the pipeline filter screen 7 of the second filter 31, specifically: the rich water filtered by the first strainer 30 sequentially passes through the first branched water pumping pipe 43, the water pumping pipe 41, the water pump 34, the water supply pipe 35, the flushing header pipe 51, the second branched flushing pipe 55, and the second branched water pumping pipe 45, enters the second strainer 31, and is back flushed from the inside of the second strainer 31.

Above-mentioned back flush ware 200 and spraying system 100 filter can reach the effect of filtering residue and rubbish, avoid rich water spray piping to block up, and can make rich water wash through first, the reverse play water of second filter 31, avoid first, second filter 31 blocks up, and need not to tear out first filter 30 and second filter 31 from rich water pond 500 before washing, also need not to connect one set of flushing device in addition and look for clean water source in addition, and it is comparatively convenient to use, and manpower and material resources have been saved greatly, and the production efficiency is improved.

It is to be understood that the filter backwash assembly 200 is not limited to use in the sump 500 and may be used in other settings for filtering.

It is understood that the connection manner of the first branched water pumping pipe 43 and the second branched water pumping pipe 45 to the filtering pipe 8 is not limited to the above-mentioned embodiment, for example, in other embodiments, the first branched water pumping pipe 43 and the second branched water pumping pipe 45 may be detachably connected to the filtering pipe 8 through pipe joints.

It will be appreciated that the connection between the flushing manifold 51 and the water supply line 35 may also be at the end of the water supply manifold 36 remote from the suction pump 34, in which case the crops in the field may also be irrigated simultaneously during the backwash, but this may cause the backwash pressure to drop, resulting in a reduced flushing effect.

The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.

Claims (10)

1. A filtering back-washing device is characterized in that: the filtering back-flushing device comprises a first filter, a second filter, a first water supply valve, a second water supply valve, a water suction pump, a water supply pipe, a water supply main valve, a first flushing valve, a second flushing valve and a flushing main valve, wherein the first filter is connected with a water inlet of the water suction pump after passing through the first water supply valve, the second filter is connected with a water inlet of the water suction pump after passing through the second water supply valve, and a water outlet of the water suction pump is connected with one end of the water supply pipe; the water supply main valve is arranged on the water supply pipe to control the on-off of the water supply pipe; the first filter is also connected with the water supply pipe after passing through the first flushing valve and the flushing main valve in sequence; the second filter is also connected with the water supply pipe after passing through the second flushing valve and the flushing main valve in sequence.

2. The filtration backflusher of claim 1, wherein: the filtering back-flushing device comprises a water pumping pipe, a first water pumping branch pipe and a second water pumping branch pipe, wherein the first water pumping branch pipe and the second water pumping branch pipe are formed by branching one end of the water pumping pipe; the first water supply valve is installed on the first water pumping branch pipe, and the second water supply valve is installed on the second water pumping branch pipe.

3. The filtration backflusher of claim 2, wherein: the filtering back-flushing device comprises a flushing main pipe, a first flushing branch pipe and a second flushing branch pipe which are formed by branching one end of the flushing main pipe, the free tail end of the flushing main pipe is connected with the water supply pipe, the free tail end of the first flushing branch pipe is connected with the first pumping branch pipe, and the junction of the first branch flushing pipe and the first branch pumping pipe is positioned between the first filter and the first water supply valve, the free end of the second branch flushing pipe is connected with the second branch pumping pipe, and the junction of the second flushing branch pipe and the second pumping branch pipe is positioned between the second filter and the second water supply valve, the first flushing valve is arranged on the first flushing branch pipe, the second flushing valve is arranged on the second flushing branch pipe, and the flushing main valve is arranged on the flushing main pipe.

4. The filtration backflusher of claim 3, wherein: the joint of the flushing main pipe and the water supply pipe is positioned between the water suction pump and the water supply main valve, and the water suction pump is an adjustable pressure pump.

5. The filtration backflusher of claim 2, wherein: the first filter and the second filter both comprise filter boxes, the filter boxes are formed by assembling box body filter screens, the box body filter screens are metal meshes, and connecting holes are formed in the side walls of the filter boxes in a penetrating manner; the free tail end of the first water pumping branch pipe extends into the first filter through the connecting hole of the first filter; the free tail end of the second water pumping branch pipe extends into the second filter through the connecting hole of the second filter; and pipeline filter screens are respectively arranged in the first water pumping branch pipe and the second water pumping branch pipe.

6. The filtration backflusher of claim 2, wherein: the first filter and the second filter both comprise filter boxes and filter pipes arranged on the filter boxes, and each filter box comprises a net frame and a box body filter screen which is coated outside the net frame and connected with the net frame; a fixing hole is formed in the box body filter screen in a penetrating manner; one end of the filter pipe is fixedly connected with the screen frame of the filter box, the other end of the filter pipe is positioned in the filter box, and a pipeline filter screen is arranged in the filter pipe; the free tail end in the first water pumping branch pipe is inserted into the filter pipe of the first filter after passing through the fixing hole; the free tail end in the second water pumping branch pipe is inserted into the filter pipe of the second filter after passing through the fixing hole.

7. The filtration backflusher of claim 2, wherein: the first filter and the second filter both comprise filter boxes and filter pipes arranged on the filter boxes, and each filter box comprises a net frame and a box body filter screen which is coated outside the net frame and connected with the net frame; a fixing hole is formed in the box body filter screen in a penetrating manner; the filter pipe penetrates through the fixing hole, and the outer peripheral wall of the filter pipe is fixedly connected with the net frame of the filter box; one end of the filter pipe is positioned in the filter box, the other end of the filter pipe is positioned outside the filter box, and a pipeline filter screen is arranged in the filter pipe; the free tail end in the first water pumping branch pipe is detachably connected with one end of the corresponding filter pipe outside the filter box; the free tail end in the second water pumping branch pipe is detachably connected with one end of the corresponding filter pipe outside the filter box.

8. The filtration backflusher of any one of claims 5 to 7, wherein: the mesh number of the pipeline filter screen is larger than that of the box body filter screen.

9. The filtration backflusher of claim 8, wherein: the pipeline filter screen reaches the box filter screen is bilayer structure.

10. The utility model provides a spraying system, includes filtering back flush ware and spray set, its characterized in that: the filtering back-flushing device comprises a first filter, a second filter, a first water supply valve, a second water supply valve, a water suction pump, a water supply pipe, a water supply main valve, a first flushing valve, a second flushing valve and a flushing main valve, wherein the first filter is connected with a water inlet of the water suction pump after passing through the first water supply valve, the second filter is connected with a water inlet of the water suction pump after passing through the second water supply valve, a water outlet of the water suction pump is connected with one end of the water supply pipe, and the other end of the water supply pipe is connected with the spraying device; the water supply main valve is arranged on the water supply pipe to control the on-off of the water supply pipe; the first filter is also connected with the water supply pipe after passing through the first flushing valve and the flushing main valve in sequence; the second filter is also connected with the water supply pipe after passing through the second flushing valve and the flushing main valve in sequence.

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