阅读说明：本技术 一种用于环保给排水净化处理领域的过滤系统 (A filtration system for environmental protection plumbing purification treatment field ) 是由 池万青 李辉 柳雪刚 李正厚 泮灵通 陈骏 朱敏 张兵 张健 王志彬 楼斌 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种用于环保给排水净化处理领域的过滤系统,包括进水槽、一端与所述进水槽相连通的进水管、与所述进水管的另一端相连通的处理箱、一端与所述处理箱相连通的虹吸管及与所述虹吸管另一端相连通的排水槽；所述进水槽包括与所述进水管相连通的槽体和与所述槽体相连通的污水槽；还包括增量结构,该增量结构可使所述虹吸管的进水量增加,虹吸管内的空气随着增加的水流排出,继而形成虹吸效应；本发明通过增量结构的设置,使得淤积在虹吸管内的空气能够被排出,继而形成虹吸效应,实现反冲洗,恢复过滤效果,保证污水处理能够正常的进行。(The invention discloses a filtering system used in the field of environment-friendly water supply and drainage purification treatment, which comprises a water inlet tank, a water inlet pipe, a treatment box, a siphon pipe and a drainage tank, wherein one end of the water inlet pipe is communicated with the water inlet tank, one end of the treatment box is communicated with the other end of the water inlet pipe, one end of the siphon pipe is communicated with the treatment box, and the drainage tank is communicated with the other end of the siphon pipe; the water inlet groove comprises a groove body communicated with the water inlet pipe and a sewage groove communicated with the groove body; the siphon device also comprises an incremental structure, the incremental structure can increase the water inflow of the siphon pipe, and air in the siphon pipe is discharged along with the increased water flow, so that a siphon effect is formed; according to the invention, through the arrangement of the increment structure, air deposited in the siphon pipe can be discharged, so that a siphon effect is formed, back washing is realized, the filtering effect is recovered, and the sewage treatment can be normally carried out.)

1. A filtering system used in the field of environment-friendly water supply and drainage purification treatment comprises a water inlet tank (2), a water inlet pipe (21) with one end communicated with the water inlet tank (2), a treatment box (1) communicated with the other end of the water inlet pipe (21), a siphon (4) with one end communicated with the treatment box (1) and a drainage tank (3) communicated with the other end of the siphon (4); the water inlet tank (2) comprises a tank body (20) communicated with the water inlet pipe (21) and a sewage tank (22) communicated with the tank body (20); the method is characterized in that: the siphon also comprises an increment structure, the increment structure can increase the water inlet quantity of the siphon pipe (4), and air in the siphon pipe is discharged along with the increased water flow, so that a siphon effect is formed.

2. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 1, wherein: the treatment box (1) comprises a box body (11), a filtering chamber (12) arranged in the box body (11), a clear water chamber (13) communicated with the filtering chamber (12) and a water outlet pipe (10) communicated with the clear water chamber (13).

3. The filtration system for use in the field of environmentally friendly purification treatment of water supply and drainage according to claim 2, wherein: the lowest point of the water outlet pipe (10) is higher than the highest point of the filter chamber (12).

4. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 3, wherein: the treatment box (1) further comprises a partition plate (15) connected with the inner wall of the box body (11) in a sealing mode and filter plates (16) connected with the inner wall of the box body (11), and the filter chamber (12) is arranged between the partition plate (15) and the filter plates (16).

5. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 4, wherein: and a cavity (19) is arranged between the filter plate (16) and the bottom surface of the box body (11).

6. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 5, wherein: the cavity (19) is communicated with the clear water chamber (13) through a clear water channel (18).

7. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 6, wherein: the clear water channels (18) are arranged at four corners of the box body (11).

8. The filtration system for use in the field of environmentally friendly water supply and drainage purification treatment according to any one of claims 1 to 7, wherein: the incremental structure comprises a valve plate (51) capable of moving back and forth, a driving piece (52) used for driving the valve plate (51) to move back and forth and a fixing assembly used for fixing the driving piece (52), wherein the valve plate (51) is used for opening and closing the water inlet pipe (21).

9. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 8, wherein: the fixing assembly comprises an outer pipe (501) matched with the water inlet pipe (21), an outer pipe edge (503) arranged on the outer pipe (501), an inner pipe (502) matched with the outer pipe (501) and an inner pipe edge (504) arranged on the inner pipe (502).

10. The filtration system for use in the field of environmental water supply and drainage purification treatment according to claim 9, wherein: the outer tube edge (503) and the inner tube edge (504) are spaced.

Technical Field

The invention belongs to the technical field of water treatment, and particularly relates to a filtering system used in the field of environment-friendly water supply and drainage purification treatment.

Background

In the water purification treatment process of the traditional water treatment plant, the filter tank is the most important and most critical purification process section of the water treatment plant and plays a role of the heart of the whole water purification treatment plant; most of traditional water purification treatment plants adopt a siphon filter tank filtration process, and are used up to now; however, the water is introduced into the filter tank, and due to the action of gravity, a part of air is sucked into the filter tank, so that the air is deposited in the siphon pipe and cannot be emptied, a siphon effect cannot be formed for backwashing, or the air emptying efficiency in the siphon pipe is low, and the efficiency of sewage treatment is seriously influenced.

Disclosure of Invention

The invention provides a filtering system used in the field of environment-friendly water supply and drainage purification treatment to overcome the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a filtering system used in the field of environment-friendly water supply and drainage purification treatment comprises a water inlet tank, a water inlet pipe, a treatment box, a siphon pipe and a drainage tank, wherein one end of the water inlet pipe is communicated with the water inlet tank, one end of the treatment box is communicated with the other end of the water inlet pipe, one end of the siphon pipe is communicated with the treatment box, and the drainage tank is communicated with the other end of the siphon pipe; the water inlet groove comprises a groove body communicated with the water inlet pipe and a sewage groove communicated with the groove body; the siphon device also comprises an incremental structure, the incremental structure can increase the water inflow of the siphon pipe, and air in the siphon pipe is discharged along with the increased water flow, so that a siphon effect is formed; through the setting of increment structure for the inflow of siphon increases substantially in the short time, thereby forms torrent's rivers in the siphon, and then makes the siltation can be unified along with torrent's rivers along with the air that rivers got into in the siphon and be discharged along with torrent's rivers, then forms the siphon effect, carries out the back flush to handling the case, resumes the filter effect, guarantees going on that sewage treatment can be normal.

Further, the treatment box comprises a box body, a filter chamber arranged in the box body, a clean water chamber communicated with the filter chamber and a water outlet pipe communicated with the clean water chamber; through the setting of above-mentioned structure for the clear water that obtains filters has a share to store in the clear water indoor, and unnecessary is discharged from outlet pipe again, through to the volumetric setting of clear water room, when making the indoor water of clear water enough with the filter material back flush in the filter chamber clean, can not waste the water resource again, thereby has improved sewage treatment's efficiency.

Further, the lowest point of the water outlet pipe is higher than the highest point of the filter chamber; through the arrangement of the structure, after clean water in the clean water chamber is basically used up, air can enter the filtering chamber to automatically stop the siphon effect, and sufficient clean water is guaranteed to be used for backwashing.

Furthermore, the treatment box also comprises a partition plate which is hermetically connected with the inner wall of the box body and a filter plate which is connected with the inner wall of the box body, and the filter chamber is arranged between the partition plate and the filter plate; through the arrangement of the structure, the clean water chamber and the filter chamber are directly formed by separating the box body, the space utilization rate is higher, the occupied area is smaller, an additional driving piece is not needed to be installed, the water flow can automatically flow when the water is filtered and backwashed by utilizing the water pressure and the air pressure, and the energy is saved.

Further, a cavity is formed between the filter plate and the bottom surface of the box body; through the setting of above-mentioned structure, make the filter chamber filter in the clear water that obtains can advance go into the cavity, because the sewage import in the filter chamber is in the middle part of filter chamber, consequently, the clear water passes through when the filter plate gets into the cavity, the cavity middle part is filled up by the clear water earlier, follow-up clear water wants the entering resistance can be great promptly, and the peripheral resistance of cavity is less, clear water can be toward flowing all around promptly, thereby make when filtering sewage, sewage in the filter chamber also can be toward flowing all around, the reposition of redundant personnel effect to sewage has been played, guarantee that the filter material layer in the filter chamber is close everywhere the debris of interception, the jam rate is also close, thereby prolong the interval time of two back flushes, and then make sewage treatment's.

Further, the cavity is communicated with the clear water chamber through a clear water channel; through the arrangement of the structure, clear water in the clear water chamber can smoothly flow into the cavity, and then the filter material in the filter chamber can be flushed completely by the cavity more uniformly, so that a better backwashing effect is achieved.

Furthermore, the clear water channels are arranged at four corners of the box body; through the setting of above-mentioned structure for when the clear water that obtains filters flows toward clear water passageway towards the cavity and clear water in the clear water passageway flows toward the filter chamber through the cavity, the distribution of rivers is more even, and the resistance that water pressure caused is littleer, and the filter bed all can play the filter effect when further guaranteeing normal filtration, and the filter bed all also all can be washd thoroughly during the back flush, makes the filter effect of sewage better, and efficiency is higher.

Furthermore, the incremental structure comprises a valve plate capable of moving back and forth, a driving piece for driving the valve plate to move back and forth and a fixing assembly for fixing the driving piece, wherein the valve plate is used for opening and closing the water inlet pipe; through the arrangement of the structure, when back flushing is needed, the water inlet pipe is sealed by the valve plate, so that the water level in the water inlet tank rises along with the entering of sewage, after the water level rises to a preset height, the valve plate opens the water inlet pipe again under the driving of the driving piece, water in the water inlet tank can be gathered in the water inlet pipe and enters the siphon pipe through the water inlet pipe, so that air in the siphon pipe is flushed away, a siphon effect can be formed, and back flushing is realized; the structure is simpler, the water level that has realized the intake chamber promptly by utilizing current water supply mode rises, it is more convenient to operate, and utilize the gravity and the hydraulic effect of water self, form "flood flow" promptly, make the inflow of siphon increase greatly in the short time, thereby wash away the intraductal air of siphon, the overall arrangement in siphon filtering pond neither can be influenced, need not to change the dimensional ratio of other parts in siphon filtering pond, the formation that siphon effect can be stable has been guaranteed again, it is more convenient, the practicality increases greatly, can be convenient use to current equipment, the cost is lower.

Furthermore, the fixing assembly comprises an outer pipe matched with the water inlet pipe, an outer pipe edge arranged on the outer pipe, an inner pipe matched with the outer pipe and an inner pipe edge arranged on the inner pipe; through the arrangement of the structure, the installation of the outer pipe and the fixed sealing between the outer pipe and the groove body are facilitated, and the installation is more convenient.

Further, a space is reserved between the outer pipe edge and the inner pipe edge; through the arrangement of the structure, the circuit connection is facilitated, and meanwhile, good sealing performance is kept.

In conclusion, the invention enables the air deposited in the siphon pipe to be discharged through the arrangement of the increment structure, so as to form a siphon effect, realize backwashing, recover the filtering effect and ensure that the sewage treatment can be normally carried out.

Drawings

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

FIG. 2 is a schematic longitudinal perspective sectional view of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is an enlarged schematic view at B of FIG. 2;

FIG. 5 is an enlarged schematic view at C of FIG. 2;

FIG. 6 is an enlarged schematic view at D of FIG. 5;

FIG. 7 is an enlarged schematic view at E in FIG. 5;

FIG. 8 is a cross-sectional structural view of the present invention;

FIG. 9 is a schematic cross-sectional view of an alternative embodiment of an incremental construction of the present invention having a greater water flow capacity;

fig. 10 is a schematic cross-sectional view of an alternative embodiment of an incremental construction of the present invention having a reduced water flow capacity.

Detailed Description

As shown in fig. 1-8, a filtering system for the field of environmental protection water supply and drainage purification treatment comprises a treatment tank 1, a water inlet tank 2, a drainage tank 3 and a siphon 4, wherein the treatment tank 1 comprises a tank body 11, a filtering chamber 12 and a clear water chamber 13, a partition plate 15 and a filtering plate 16 are installed in the tank body 11, the filtering chamber is formed between the partition plate and the filtering plate, a filtering material is laid in the filtering chamber to form a filtering material layer 17, so as to filter impurities in sewage, preferably, the filtering chamber is divided into a plurality of layers, each layer is provided with the filtering material, and the filtering materials are different in type, so that the effect of filtering layer by layer is achieved, and the filtering effect is better; a cavity 19 is formed between the filter plate 16 and the bottom wall of the filter chamber 12, so that the resistance of sewage passing through the filter material layer is the same, the water passing through all the positions of the filter material layer is similar, the blocking period of the filter material layer is further prolonged, and the sewage treatment efficiency is higher; clear water channels 18 are formed at four corners of the box body 11, one end of each clear water channel is communicated with the cavity 19, and the other end of each clear water channel is communicated with the clear water chamber 13; the clear water chamber is positioned above the filtering chamber 12, so that when the water amount in the filtering chamber is reduced, clear water in the clear water chamber reversely flows into the filtering chamber through the clear water channel, the cavity and the filtering plate, and the filtering material in the filtering material layer 17 is lifted to form back washing without external force, so that the method is more convenient and simpler; a water outlet pipe 10 is communicated with the side wall of the box body 11 and is communicated with the clear water chamber, and a pipe orifice is positioned at the upper part of the clear water chamber; a water distribution disc 14 is arranged in the filtering chamber 12, and a plurality of water distribution holes 141 are arranged on the water distribution disc, so that sewage entering the water distribution disc can be uniformly dispersed in the filtering chamber 12 through the plurality of water distribution holes, and the filtered sewage quantity and the blocking degree of a filter material layer in the filtering chamber are similar in the process of filtering the sewage, so that the interval time of two back flushes is prolonged, and the sewage treatment efficiency is higher; the filter plate 16 may be a plate body with common filter holes, or a filter head plate with filter heads commonly used in the field of sewage treatment.

Specifically, the water inlet tank 2 comprises a tank body 20, a water inlet pipe 21 and a sewage tank 22; one end of the water inlet pipe is communicated with the bottom of the tank body 20, the other end of the water inlet pipe is communicated with the water distribution disc 14, and the bottom surface of the tank body 20 is higher than the top surface of the tank body 11, so that sewage in the tank body can enter the water distribution disc through the water inlet pipe under the action of gravity, no extra driving pieces such as a water pump are needed for conveying the sewage, and the cost is lower; the sewage tank 22 is communicated with the tank body 20 and is used for conveying sewage to be treated into the tank body, and a water outlet of the sewage tank is communicated with a water inlet at the upper end of the tank body.

Specifically, the upper end of the side wall of the drainage groove 3 is lower than the bottom wall of the treatment box, and the side wall of the drainage groove is provided with a drainage port 31 which is positioned at the upper part of the side wall of the drainage groove, so that part of water is always reserved in the drainage groove to form a water seal; the siphon 4 comprises a connecting pipe section 41, a lifting pipe section 42, a drainage pipe section 44 and a bending pipe section 43, one end of the connecting pipe section 41 is communicated with the water distribution disc 14, the other end of the connecting pipe section is communicated with the lower end of the lifting pipe section 42 extending out of the treatment tank 1, the lifting pipe section is obliquely and upwards installed, the other end of the connecting pipe section is communicated with one end of the bending pipe section 43, the other end of the bending pipe section is communicated with one end of the drainage pipe section 44, the drainage pipe section is installed in a vertical state, the other end of the drainage pipe section penetrates into the drainage groove 3, and.

The normal filtering work flow is as follows: after flowing into the sewage tank 22, the sewage flows into the tank body 20 communicated with the sewage tank, then flows into the water distribution tray 14 through the water inlet pipe 21 communicated with the bottom of the tank body, and is uniformly dispersed in the filter chamber 12 through the water distribution holes 141 on the water distribution tray, then the sewage passes through the multi-layer filter material layer 17 in the filter chamber under the action of gravity and water pressure, so that impurities in the sewage are adsorbed and blocked by the filter material layer, and the clear water passes through the filter plate 16 and enters the cavity 19, and then the clear water in the cavity can move upwards to the clear water chamber 13 along the clear water channel 18 under the action of water pressure and air pressure, and when the water level in the clear water chamber rises to the pipe orifice of the water outlet pipe 10, the clear water flows out from the pipe orifice and enters the subsequent treatment steps.

And along with the going on of filtering work, filter the debris that intercept more and more in the precoat 17, the precoat can be blockked up slowly, and the through rate of sewage can be lower and lower promptly, and sewage can slowly overflow to siphon 4 in, need carry out the back flush to the precoat in order to resume the filter effect on the precoat, and because leave the air in the siphon, can't form the siphon, so installed exhaust apparatus with the intraductal air evacuation of siphon for can form the siphon effect.

Specifically, the exhaust device comprises a downpipe 61 and an exhaust pipe 62, one end of the downpipe 61 is communicated with one side of the lifting pipe section 42 close to the bent pipe section 43, and the other end of the downpipe extends into the water below the water surface of the drainage channel 3; one end of the air suction pipe 62 is communicated with the upper part of the downpipe 61, the other end is communicated with the bent pipe section 43, and the pipe orifice is positioned at the vertex of the bent pipe section (namely the highest position of the siphon pipe); because the water inlet of the water inlet pipe 21 is at a level slightly higher than the level of the pipe orifice at the connection between the downpipe 61 and the lifting pipe section, or the levels of the two are the same, when the filter material layer 17 is blocked to cause the passing rate of sewage to decrease and the water level of sewage rises, the sewage can overflow into the siphon slowly, and the water level in the siphon can rise continuously, all air in the connection pipe section and most air in the lifting pipe section are squeezed out, when the water level rises to the pipe orifice at which the downpipe 61 is located in the lifting pipe section 42, the sewage can quickly fall into the drainage groove from the downpipe, and due to the falling of the sewage, negative pressure can be formed at the pipe orifice at which the exhaust pipe 62 is connected with the downpipe, so that negative pressure is formed at the pipe orifice at which the exhaust pipe is connected with the bending pipe section, air in the siphon is sucked into the exhaust pipe, and is discharged together with the sewage in the downpipe, so that negative pressure is formed in the siphon, water in the drainage channel is sucked into the drainage pipe section 44 under the action of the negative pressure, the water level in the drainage pipe section is continuously raised, and at the moment, because water flows back into the drainage channel from the drainage port 31, the pipe orifices of the drainage pipe section and the downpipe are always under the water surface; and the water level in the drainage pipe section continuously rises, namely the water level in the drainage pipe section is converged with the water in the lifting pipe section at the bent pipe section, at the moment, because a large amount of air is still left at the bent pipe section, siphon can not be formed for back washing, under the normal condition, siphon can be formed by pumping the air at the bent pipe section along with the air exhaust pipe, however, when sewage flows into the inlet pipe 21 from the inlet tank 2, a large amount of air is carried into the inlet pipe, then enters the siphon tube and rises to the bent tube section under the action of buoyancy, so that air at the bent tube section cannot be pumped out, siphon cannot be formed for back washing, or the air of bending pipe section department is taken out futilely very slowly, leads to at the in-process of taking out dry air, and a large amount of sewage are discharged into the water drainage tank, and the follow-up water yield that needs carry out sewage treatment again increases greatly, has seriously influenced sewage treatment's efficiency, leads to actually to produce the water yield low.

In order to solve the problem that the air in the siphon is difficult to discharge, the siphon water purifier is provided with the increment structure, so that the water inflow of the siphon 4 is greatly increased, the air remained in the siphon is flushed out along with the water flow rushing in a short time, a siphon effect is further formed, the filter material in the filter material layer 17 in the filter chamber 12 is backwashed, impurities intercepted and adhered in the filter material layer are washed away, then the filter material layer is discharged along with the siphon pipe along with the backwashing water flow, the backwashing to the filter material layer is realized, and the filter material layer after backwashing can recover the filtering function.

Specifically, the incremental structure comprises a valve plate 51, a driving piece 52 and a fixing component; the fixing component comprises a shell 50 and a fixing frame 53; the outer shell 50 is composed of an outer tube 501 and an inner tube 502, the outer tube is at least partially embedded into a tube opening where the water inlet tube 21 is communicated with the tank body 20, an outer tube edge 503 is formed at the upper end of the outer tube, so that the outer tube is convenient to fix, and meanwhile, the outer tube is convenient to form sealing fit with the bottom surface of the tank body, and water leakage is avoided; the lower part of the inner pipe 502 is arranged in the outer pipe in a penetrating way, the inner pipe and the outer pipe are welded, and an inner pipe edge 504 is formed at the upper end of the inner pipe; the fixing frame 53 is welded on the inner wall of the inner pipe, the driving piece 52 is connected to the fixing frame through bolts, the driving piece is a commercially available air cylinder, the specific model is not limited, and the method is the prior art, so the method is not described herein; the valve plate 51 is arranged on the output end of the driving piece 52 and can be driven by the driving piece 52 to lift and fall back and forth; and because the inner tube is along keeping the interval with the outer tube along 503 between, can be very convenient penetrate pipeline 529 and link to each other with the driving piece, can not influence the leakproofness between valve plate and the inner tube along.

When back flushing is needed, when the liquid level detector detects that the water level in the siphon 4 rises to the point that the water in the drainage pipe section and the water in the lifting pipe section are merged at the bent pipe section, the controller can control the driving piece 52 to start and drive the valve plate 51 to descend to the point tightly attached to the inner pipe edge 504, so that the sewage in the tank body 20 cannot flow into the water inlet pipe 21, the water level in the tank body 20 is higher and higher, after the liquid level detector in the tank body detects that the water level in the tank body reaches a preset height, the controller controls the driving piece to start and drive the valve plate 51 to rise, so that the water inlet pipe is communicated with the tank body again, the sewage in the tank body is gathered in the water inlet pipe under the action of water pressure and air pressure, and then flows into the siphon through the water inlet pipe (at this time, the filter material layer is blocked by sundries), and along with the fact that, the turbulent water flow can flush out the air in the bent pipe section, so that no air residue is left in the siphon pipe, a siphon effect can be formed after the water level in the tank body 20 is lowered to be lower than that of the bent pipe section, the sewage flowing into the water inlet pipe 21 is directly sucked into the siphon pipe and then discharged into the drainage tank 3 for discharge, and the siphon pipe can suck the sewage in the filter chamber 12 communicated with the siphon pipe into the siphon pipe and then discharged into the drainage tank because the efficiency of discharging the sewage by the siphon pipe is far greater than the efficiency of inputting the sewage by the water inlet pipe; the clean water chamber 13 is positioned above the filtering chamber 12 and is communicated with the cavity 19 through the clean water channel 18, so when the siphon sucks away water in the filtering chamber, clean water in the clean water chamber flows into the cavity through the clean water channel and then flows into the filtering chamber through the filtering plate 16 in the cavity, thereby back washing of the filtering material layer 17 is formed, washed impurities are sucked into the siphon 4 through the water distribution plate 14 and are discharged, clean water in the clean water chamber continuously descends along with the back washing, when the water level descends to the cavity, air enters the filtering chamber, so that air is sucked into the siphon, the siphon effect is destroyed, and the back washing is completed; at the moment, the sewage in the water inlet pipe 21 flows into the filtering chamber again, so that the filtering material in the filtering chamber is reformed into the filtering material layer 17 under the action of gravity and water pressure, and the filtering of the sewage is restarted.

In the process of back flushing, the water distribution disc 14 plays a role of blocking the filter material, so that the filter material is prevented from being sucked away by the siphon 4, and the phenomenon of material leakage is avoided; the clear water channel 18 is arranged around the box body 11, and the pipe orifice of the siphon is positioned at the center of the top of the filtering chamber 12, so that clear water can flow from the periphery of the bottom of the filtering chamber to the center of the top of the filtering chamber, the filtering materials in the filtering chamber can be guaranteed to be impacted by the back washing water flow, the back washing effect is better, the time interval between two times of back washing is further prolonged, and the sewage treatment efficiency is higher.

Specifically, the incremental structure further comprises a lower adjusting screw 54, a water quantity adjusting plate 55, a lower adjusting nut 56, an upper adjusting screw 57 and an upper adjusting nut 58; the upper adjusting screw 57 is installed on the output end of the driving piece 52, and the valve plate 51 is sleeved on the upper adjusting screw and can move back and forth along the upper adjusting screw; the upper adjusting nut 58 is in threaded connection with the upper adjusting screw rod, and two upper adjusting nuts are mounted, so that the valve plate is fixed on the upper adjusting screw rod through the upper adjusting nuts, and the distance between the valve plate and the driving piece can be adjusted as required; lower accommodate the lead screw 54 is installed on mount 53, and water yield regulating and control board 55 cup joints promptly on accommodate the lead screw down, can make things convenient for the interval between regulating and control board and the inner tube 502 of regulating and control water yield along lower accommodate the lead screw back and forth slip to adjust the throughput of rivers, with the different demands that adapt to different equipment, adjusting nut 56 spiro union is on adjusting and control the lead screw down, fixes water yield regulating and control board in required position department through adjusting nut down, the convenient regulation.

In other embodiments, the incremental structure may also be a water pump installed in the water inlet pipe 21 or the siphon pipe 4, and also can play a role in increasing the water inflow in the siphon pipe, so as to evacuate the air in the siphon pipe and form a siphon effect.

In other embodiments, the exhaust device may also be a suction pump, and air in the siphon pipe is evacuated by the suction pump, so that a siphon effect can be formed to perform backwashing.

9-10, in other embodiments, the housing 50 may have only one housing and not be divided into inner and outer tubes, the inner tube extending outwardly from at least a portion of the surface of the upper end of the housing along 504 to facilitate a sealing engagement with the valve plate; the outer tube edge 503 is formed by extending at least a portion of the surface of the side wall of the housing, so as to facilitate the installation and fixation of the housing, and a gap is left between the outer tube edge and the inner tube edge, so as to facilitate the pipeline 529 to penetrate from the housing between the inner tube edge and the outer tube edge and communicate with the driving member 52.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.