CN113318506B

CN113318506B - Water and gas distribution system of flap filter

Info

Publication number: CN113318506B
Application number: CN202110600376.6A
Authority: CN
Inventors: 叶东旭; 代如亭; 叶馨; 叶国湘; 叶瑞清; 王雪玲; 徐娟; 王嘉雯; 叶培辉; 王明皆
Original assignee: Zhejiang Weihong Water Treatment Equipment Co ltd
Current assignee: Zhejiang Weihong Water Treatment Equipment Co ltd
Priority date: 2021-05-31
Filing date: 2021-05-31
Publication date: 2022-02-01
Anticipated expiration: 2041-05-31
Also published as: CN113318506A

Abstract

The invention discloses a water and gas distribution system of a flap filter, which comprises a filter tank, an air pump, a backwashing water pump and a control cabinet, and is characterized in that: the upper end of the filter tank is provided with a water inlet channel, the lower end of the filter tank is provided with a water outlet for discharging filtered liquid, the side wall of the filter tank is provided with a flap valve for backwashing drainage, the outer side of the flap valve is provided with a drainage channel, the air pump and the backwashing water pump are respectively connected to the bottom of the filter tank through corresponding pipelines, the water outlet is provided with a water outlet turbidity meter, the drainage channel is provided with a drainage turbidity meter, and the side wall of the filter tank is internally provided with an air blowing floating pipe with the air blowing direction opposite to that of the flap valve; the control cabinet is internally provided with a control circuit and a controller, the work of the filter tank is controlled by the controller in a programming way, and the controller is a PLC.

Description

Water and gas distribution system of flap filter

Technical Field

The invention belongs to the technical field of a flap filter, and particularly relates to a flap filter water and gas distribution system.

Background

In the water purification process, filter filtration is an important part and is the most primary process. In the filtering process, the impurities filtered out from the water are continuously accumulated in the filter material layer, and the accumulated impurities can cause unqualified water quality of the discharged water, so that the water production efficiency is reduced. It is therefore necessary to remove the impurities accumulated in the filter bed by backwashing. At present, most of filter chamber backwashing control is to control a production process according to an empirical method, namely, a time is set according to experience, and a backwashing program is started once the time is up. The process of backwashing also sets the flushing time according to experience. This approach has the following problems: firstly, the back flushing time can not be accurately mastered, the effluent quality is still qualified sometimes, but the set time is up, and the water energy and the electric energy are wasted by forcibly carrying out the back flushing; or the effluent quality is unqualified, but the set time is not up, and the back washing can not be carried out in time, so that the production quality of the tap water plant can not reach the standard. Secondly, the backwashing process is not accurately controlled, sometimes the filter material is washed clean, but the backwashing is not finished, so that the water energy and the electric energy are wasted, or the filter material is not washed clean, the backwashing is finished, and the backwashing purpose cannot be achieved. In addition, the inlet end of the existing gas distribution system is easily blocked by small particles generated by a filter material layer or unfiltered dirt in the backwashing process, so that the integral gas supply is influenced, and the backwashing effect is further influenced.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a water and gas distribution system of a flap filter, which can intelligently obtain back washing and place gas distribution blockage.

In order to achieve the purpose, the invention provides the following technical scheme: turn over board filtering pond water distribution gas distribution system, including filtering ponds, air pump, back flush water pump and switch board, characterized by: the upper end of the filter tank is provided with a water inlet channel, the lower end of the filter tank is provided with a water outlet for discharging filtered liquid, the side wall of the filter tank is provided with a flap valve for backwashing drainage, the outer side of the flap valve is provided with a drainage channel, the air pump and the backwashing water pump are respectively connected to the bottom of the filter tank through corresponding pipelines, the water outlet is provided with a water outlet turbidity meter, the drainage channel is provided with a drainage turbidity meter, and the side wall of the filter tank is internally provided with an air blowing floating pipe with the air blowing direction opposite to that of the flap valve; the control cabinet is internally provided with a control circuit and a controller, the work of the filter tank is controlled by the controller in a programming way, and the controller is a PLC.

The invention is further configured to: the air pump is connected with the bottom of the filter tank through an exhaust pipeline, and one or more exhaust ends of the exhaust pipeline can be connected in parallel; wherein, one end of the exhaust pipeline connected with the bottom of the filter tank is an inlet end; the exhaust pipeline comprises a pneumatic flow control valve, a pressure regulating structure, a check valve, an air inlet stop valve, a flushing buffer, a flushing stop valve and an air outlet stop valve which are sequentially connected through a pipeline from the air pump to the bottom of the filter tank;

the top of the flushing buffer is connected with the air inlet stop valve through a pipeline, the side part of the upper end of the flushing buffer is connected with the flushing stop valve through a pipeline, the bottom of the flushing buffer is provided with a drain valve, the bottom of the drain valve is connected with a water storage barrel through a pipeline, the bottom of the water storage barrel is connected with a drain pump through a pipeline, and an electromagnetic valve can be arranged between the water storage barrel and the drain pump; the outlet end of the drainage pump is connected with a pressurizing structure, and the outlet end of the pressurizing structure is connected to a pipeline connected between the flushing stop valve and the air outlet stop valve through a pipeline; a flow detection device is arranged on a pipeline connecting the air outlet stop valve and the bottom of the filter tank, and the flow detection device is arranged on a main pipe at the outlet end of the exhaust pipeline; an air pressure detection device is arranged on a pipeline connected between the check valve and the pressure regulating structure; the pneumatic flow control valve, the pressure regulating structure, the air inlet stop valve, the flushing stop valve, the air outlet stop valve and the drain valve are controlled by the controller.

The invention is further configured to: the air inlet stop valve, the flushing stop valve and the air outlet stop valve are all in an open state when the exhaust pipeline works, the pneumatic flow control valve controls the flow of inlet air, the air pressure detection device is used for detecting air pressure, and the pressure regulating structure is used for regulating the air pressure in the exhaust pipeline; after being discharged from the air pump, the gas sequentially passes through the pneumatic flow control valve, the pressure regulating structure, the air inlet stop valve, the check valve, the flushing buffer, the flushing stop valve and the air outlet stop valve, and then is discharged from the outlet end of the exhaust pipeline at the bottom of the filter tank to enter the filter tank; and the liquid which flows back from the bottom of the filter tank enters the flushing buffer through the flushing stop valve and the air outlet stop valve and then is discharged into the water storage barrel through the drain valve, the flushing buffer is an integral pressure-resistant container with the volume of 300 plus 500L, and the volume of the water storage barrel is 5-6 times of that of the flushing buffer.

The invention is further configured to: a filter is arranged at the bottom of the flushing buffer; a vacuumizing device is connected to a pipeline connected between the flushing buffer and the air inlet stop valve through a pipeline, when the vacuumizing device operates, the flushing stop valve and the air outlet stop valve are opened, the air inlet stop valve is closed, and a negative pressure state is formed between the flushing buffer and the air outlet stop valve, so that water at the outlet end of the exhaust pipeline at the bottom of the filter tank flows into the flushing buffer through the flushing stop valve and the air outlet stop valve and is discharged into the water storage barrel through the filter and the drain valve; when the draining pump operates, the flushing stop valve is closed, the air outlet stop valve is opened, water in the water storage barrel enters a pipeline connected between the flushing stop valve and the air outlet stop valve through the draining pump and the pressurizing structure, and then is discharged out of the outlet end of an exhaust pipeline at the bottom of the filtering tank through the air outlet stop valve; and a liquid level sensor I is arranged in the flushing buffer, and a liquid level sensor II is arranged in the water storage barrel.

The invention is further configured to: the pressurizing structure comprises a water inlet pipe part and a water outlet pipe part which are connected in a threaded manner, a pressure regulating mechanism is arranged between the water inlet pipe part and the water outlet pipe part, a blocking edge is arranged in the water inlet pipe part and extends to the end face of one side of the water inlet pipe part connected with the water outlet pipe part, and a water inlet cavity is formed on the inner side of the water inlet pipe part, which is positioned on the blocking edge; the pressure regulating mechanism comprises a pressure regulating sleeve inserted into a water inlet cavity of the water inlet pipe part and extending out, a limiting part which is abutted against the end part of the blocking edge is formed on one side of the pressure regulating sleeve positioned in the water inlet pipe part, a supporting part which is abutted against the end surface of the water inlet pipe part is formed on one side of the pressure regulating sleeve positioned outside the water inlet pipe part, and a buffer spring is arranged between the limiting part and the blocking edge; the bottom of the pressure regulating sleeve is provided with a closed section, the middle part of the closed section extends outwards to form a pressurizing part, a pressurizing channel communicated with the pressure regulating sleeve is formed in the pressurizing part, and the pressurizing channel does not penetrate through the pressurizing part to enable the bottom of the pressurizing channel to be in a closed shape; and a pressurizing hole communicated with the pressurizing channel is formed on the side wall of the pressurizing part.

The invention is further configured to: a pressurizing nozzle is fixedly arranged outside the bottom of the pressure regulating sleeve and is connected to the closed section at the bottom of the pressure regulating sleeve through threads; the pressurizing nozzle is coated with the pressurizing part, and the pressurizing channel is positioned in the pressurizing nozzle; the side wall of the pressurizing part is provided with a plurality of pressurizing holes which are uniformly distributed, and the bottom of the pressurizing nozzle is provided with a water outlet hole; water flows into from the inlet pipe portion, through the pressure regulating sleeve to flow out through pressure boost portion, because the bottom of the pressure boost passageway in the pressure boost portion is for sealing the form, and the pressure boost hole sets up on the lateral wall of pressure boost portion, makes the pressure boost passageway produce flow resistance to water, thereby increases the pressure of pressure regulating sleeve water-logging, and makes under the pressure effect be located spacing portion and keep off the buffer spring compression between the edge.

The invention is further configured to: a conical surface bearing hole is formed in the pressurizing nozzle, and the water outlet hole is communicated with the conical surface bearing hole; the end part of the pressurizing nozzle is integrally provided with a pressurizing rod, the water outlet hole extends to the bottom of the pressurizing rod and is positioned at the bottom of the pressurizing rod to form a closed shape, and the side wall of the bottom of the pressurizing rod is provided with a plurality of pressurizing water passing holes which are uniformly distributed according to the circumference and are communicated with the water outlet hole; the water outlet pipe part comprises a bearing section in threaded connection with the water inlet pipe part and a water outlet section connected with the pipeline, the water outlet pipe part is fixed on the water inlet pipe part through the bearing section in a threaded manner, and a bearing chamber for the pressurizing nozzle to reciprocate is formed in the bearing section; the inner wall of the water outlet section is matched with a pressure-increasing rod, a sealing rubber layer is fixedly arranged on the inner wall of the water outlet section, and the pressure-increasing rod extends out of the water outlet section under the driving of the pressure-adjusting sleeve; under the condition that the pressurizing structure does not feed water, the supporting part of the pressure regulating sleeve can be abutted against the end surface of the water inlet pipe part, and the pressurizing rod is positioned in the water outlet section so as to cut off the connection with the pipeline; when the pressurizing structure is filled with water, the pressure regulating sleeve moves, so that the pressurizing rod extends out of the water outlet section and is connected with the pipeline.

The invention is further configured to: the pressure regulating structure comprises a pressure regulating shell with an air inlet and an air outlet, a pressure regulating wheel, a linear motor and a rotating motor; the pressure regulating shell is connected with the pipeline through an air inlet and an air outlet, the pressure regulating shell comprises a cylindrical mounting part and a round platform-shaped regulating part, the air inlet is arranged at the side end of the mounting part, the air outlet is arranged at one end with a small diameter of the regulating part, the pressure regulating wheel is arranged in the pressure regulating shell, a pressure regulating gap is formed between the pressure regulating wheel and the regulating part of the pressure regulating shell, and a driving shaft of the rotating motor extends into the pressure regulating shell and is fixedly connected with the pressure regulating wheel, so that the pressure regulating wheel is driven to rotate; a driving plate is fixedly arranged on a driving shaft of the linear motor, and the rotating motor is fixedly arranged on the driving plate; thereby adjust the pressure regulating clearance between regulating wheel and the regulation portion through linear electric motor.

The invention is further configured to: the front end of the regulating wheel is provided with a plurality of blades which are uniformly distributed according to the circumference, the blades and the regulating wheel are mutually and vertically arranged, the side ends of the blades are provided with inclined plane cutting parts matched with the regulating parts, the front ends of the blades are provided with pressure regulating discs for connecting and reinforcing the blades, the pressure regulating wheels and the pressure regulating discs are mutually arranged in parallel, and the pressure regulating structure regulates the size of a pressure regulating gap by changing the positions of the pressure regulating discs; the air inlet and the air outlet are vertically arranged on the pressure regulating shell; the inclined plane cutting part of the blade does not abut against the inner wall of the adjusting part in the moving process of the adjusting wheel; a support rod for limiting and supporting is arranged between the linear motor and the pressure regulating shell; the end face of the mounting part is provided with a cake-shaped mounting part protruding outwards, the mounting part is coaxially provided with a connecting hole penetrating into the mounting part, a driving shaft of the rotating motor is inserted into the mounting part through the connecting hole, a plurality of coaxially arranged mounting grooves are arranged in the connecting hole, and sealing elements are arranged in the mounting grooves; the cross-section of sealing member be the rectangle, the sealing member inside wall is provided with accepts the groove, accepts to be provided with the support ring on the groove, the transversal type of personally submitting of support ring, all be provided with the transversal trapezoidal seal groove of personally submitting in the both sides that the groove was accepted to sealing member inside wall and position, be provided with the sealed muscle of looks adaptation in the seal groove, just accept the inslot intussuseption and be filled with lubricating grease.

The invention is further configured to: the air pump and the exhaust pipeline supply air to the bottom of the filter tank and remove scale, and when the controller detects that the flow of the gas discharged from the outlet end of the exhaust pipeline is reduced in unit time through the flow detection device, the controller judges that the outlet end of the exhaust pipeline is blocked by dirt or impurities and controls the air pump and the exhaust pipeline to remove scale; when the air pump is in an air supply state, the pneumatic flow control valve, the air inlet stop valve, the flushing stop valve and the air outlet stop valve of the exhaust pipeline are all in an open state, the air pump is in an open state, the drainage pump is in a closed state, the vacuumizing device is in a stop state, the linear motor is in a stop state, the driving shaft is in a retraction state, and the rotating motor is in a stop state;

the descaling control method comprises the following steps:

s1, flushing reversely, wherein the controller controls to close the air pump, the pneumatic flow control valve, the air inlet stop valve and open the vacuumizing device, so that negative pressure is formed in a pipeline from the flushing buffer to the end section of the exhaust pipeline, water outside the outlet end of the exhaust pipeline is pressed into the outlet end of the exhaust pipeline at the highest speed under the action of pressure so as to perform preliminary descaling on the outlet end of the exhaust pipeline and the inner wall of the pipeline at the inner side of the exhaust pipeline, the air inlet stop valve and the vacuumizing device are closed until a liquid level sensor in the flushing buffer senses that the water reaches a limit value, then the drain valve is opened to discharge the water in the flushing buffer into the water storage barrel, and the drain valve is closed until the water in the flushing buffer is discharged;

s2, positive air charging, wherein the controller opens the air pump, the pneumatic flow control valve and the air inlet stop valve and drives the linear motor and the rotary motor to operate, so that high-pressure air is blown out from a pipeline on the inner side of the exhaust pipeline, and secondary descaling is realized, wherein the controller is provided with a time for primary positive air charging;

s3, directional flushing and positive inflation are circulated for multiple times, and when the positive inflation time of the step S2 is reached, the step S1 is switched again; the controller is provided with the number of cycles between S1 and S2;

s4, flushing in the positive direction, and closing the pneumatic flow control valve, the air inlet stop valve, the flushing stop valve and the air outlet stop valve when the cycle number of the step S3 is reached; then starting the drainage pump for several seconds, and then opening the air outlet stop valve, so that the water pressurized by the drainage pump and the pressurization structure is discharged through the air outlet stop valve and the outlet end of the exhaust pipeline, and finally descaling is carried out until the water in the water storage barrel is emptied;

s5, detecting air supply, wherein the controller controls the exhaust pipeline and the air pump to enter an air supply state, and continuously acquires the flow in unit time detected by the flow detection device during the air supply detection;

s6, removing the dirt or giving an alarm, and entering a dirt removing mode when the flow is detected to be normal within the set time; and when the flow rate is not detected to be recovered to be normal within the set time, the step S1 is performed again, the number of the cycles is one, the step S6 is performed, the flow rate is detected to be recovered to be normal within the set time, the dirt removing mode is performed, and the alarm mode is performed when the flow rate is not detected to be recovered to be normal within the set time.

Compared with the prior art, the invention has the following characteristics:

the water quality of the water outlet is monitored in real time through the effluent turbidity meter, and the backwashing can be carried out in time when the effluent quality is unqualified, so that the waste of water energy and electric energy caused by the early backwashing is avoided; similarly, the water quality of the drainage channel is monitored in real time by the online turbidity meter, so that whether the backwashing is thorough or not can be accurately judged, and the backwashing is finished in time, so that the aim of backwashing is fulfilled, and water energy and electric energy are saved;

by arranging the exhaust pipeline, directional flushing and positive inflation can be carried out when the inlet end of the exhaust pipeline is blocked by dirt, so that the dirt at the position, connected with the exhaust pipeline, at the bottom of the filter tank is removed;

the pressure regulating structure is arranged on the exhaust pipeline, so that gas can be pressurized when the exhaust pipeline is in a gas supply state or a descaling state, the gas pressure in the exhaust pipeline is ensured, and better gas supply and descaling effects are ensured;

the positive flushing is carried out by arranging the pressurization structure, the flushing stop valve and the drainage pump on the exhaust pipeline, so that the high-pressure flushing of the inlet end of the exhaust pipeline can be realized, and the descaling effect is further ensured;

and the water enters the forward flushing after being repeatedly circulated through the forward flushing and the forward inflation, thereby ensuring the descaling effect and being convenient for the integral operation of the water and gas distribution system of the flap filter.

Drawings

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

FIG. 2 is a schematic view of the exhaust line of the present invention;

FIG. 3 is a schematic structural view of a pressurizing structure according to the present invention;

FIG. 4 is a schematic diagram of the voltage regulating structure of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at I;

FIG. 6 is a logic control diagram of the descaling state according to the present invention;

reference numbers in the drawings and corresponding part names: 1-a filter tank, 2-an air pump, 3-a back-flushing water pump, 4-an inlet channel, 5-an outlet, 6-a flap valve, 7-an outlet turbidimeter, 8-a drain channel, 9-a drain turbidimeter, 10-an air blowing floating pipe, 100-an exhaust pipeline, 101-an air flow control valve, 102-a check valve, 103-an air inlet stop valve, 104-a flushing stop valve, 105-an outlet stop valve, 106-a flushing buffer, 107-a drain valve, 108-a water storage barrel, 109-a drain pump, 110-a flow detection device, 111-an air pressure detection device, 112-a vacuum pumping device, 113-a liquid level sensor I, 114-a liquid level sensor II, 130-a pressure regulating structure, 131-a belt air inlet, 132-an air outlet, a pressure regulating structure, 133-pressure regulating shell, 133 a-placing part, 133 b-regulating part, 134-pressure regulating wheel, 135-linear motor, 136-rotary motor, 137-driving plate, 138-blade, 138 a-inclined plane cutting part, 138 b-pressure regulating plate, 139-mounting part, 140-connecting hole, 141-placing groove, 142-sealing part, 143-receiving groove, 144-supporting ring, 145-sealing groove, 146-sealing rib, 150-pressurizing structure, 151-water inlet pipe part, 151 a-blocking edge, 152-water outlet pipe part, 152 a-receiving section, 152 b-water outlet section, 153-pressure regulating sleeve, 15 a-limiting part, 153 b-supporting part, 154-buffer spring, 155-pressurizing part, 156-pressurizing channel, 157-pressurizing hole, 158-pressurizing nozzle, 158 a-conical surface bearing hole, 159-pressurizing rod, 160-pressurizing water passing hole, 161-water outlet hole and 162-sealing rubber layer.

Detailed Description

Embodiments of the present invention are further described with reference to fig. 1 to 6.

The utility model provides a board filtering pond water distribution gas distribution system turns over, includes filtering ponds 1, air pump 2, back flush water pump 3 and switch board, characterized by: the upper end of the filtering tank 1 is provided with a water inlet channel 4, the lower end of the filtering tank is provided with a water outlet 5 for discharging filtered liquid, the side wall of the filtering tank 1 is provided with a flap valve 6 for back flush drainage, the outer side of the flap valve 6 is provided with a drainage channel 8, the air pump 2 and the back flush water pump 3 are respectively connected to the bottom of the filtering tank through corresponding pipelines, the water outlet 5 is provided with a water outlet turbidity meter 7, the drainage channel 8 is provided with a drainage turbidity meter 9, and the side wall of the filtering tank 1 is provided with an air blowing floating pipe 10 with the air blowing direction opposite to the flap valve 6; the control cabinet is internally provided with a control circuit and a controller, the work of the filter tank 1 is controlled by the controller through programming, and the controller is a PLC.

The PLC monitors the water quality of the water outlet 5 in real time through the water outlet turbidity meter 7 and the water outlet turbidity meter 7, and can perform backwashing in time when the water quality of the water outlet is unqualified, so that the waste of water energy and electric energy caused by too early backwashing is avoided; similarly, the real-time monitoring of the water quality of the drainage channel 8 by the online turbidity meter can accurately judge whether the backwashing is thorough or not, and the backwashing is finished in time, so that the backwashing purpose is achieved, and the water energy and the electric energy are saved; and the air blowing floating pipe blows air to provide certain power for the liquid level, and impurities floating on the liquid level can be blown to quickly discharge out of the filter tank through the flap valve 6, so that the time required by backwashing is shortened, and the loss of filter materials caused by backwashing is reduced.

Further: the air pump 2 is connected with the bottom of the filter tank through an exhaust pipeline 100; the exhaust pipeline 100 comprises a pneumatic flow control valve 101, a pressure regulating structure 130, a check valve 102, an air inlet stop valve 103, a flushing buffer 106, a flushing stop valve 104 and an air outlet stop valve 105 which are sequentially connected through pipelines from the air pump 2 to the filter tank;

the top of the flushing buffer 106 is connected with the air inlet stop valve 102 through a pipeline, the side part of the upper end of the flushing buffer 106 is connected with the flushing stop valve 104 through a pipeline, a drain valve 107 is arranged at the bottom of the flushing buffer 106, the bottom of the drain valve 107 is connected with a water storage barrel 108 through a pipeline, the bottom of the water storage barrel 108 is connected with a drain pump 109 through a pipeline, the outlet end of the drain pump 109 is connected with a pressurization structure 150, and the outlet end of the pressurization structure 150 is connected to a pipeline connected between the flushing stop valve 104 and the air outlet stop valve 105 through a pipeline; a flow detection device 110 is arranged on a pipeline connected with the outlet end of the exhaust pipeline by the outlet stop valve 105, and an air pressure detection device 111 is arranged on a pipeline connected between the check valve 102 and the pressure regulating structure 130; the pneumatic flow control valve 101, the pressure regulating structure 130, the air inlet stop valve 103, the flushing stop valve 104, the air outlet stop valve 105 and the drain valve 107 are all solenoid valves and are controlled by the controller in a programming way.

When the air pump is in an air supply state, high-pressure air generated from the air pump 2 passes through the pneumatic flow control valve 101, the pressure regulating structure 130, the check valve 102, the air inlet stop valve 103, the flushing buffer 106, the flushing stop valve 104 and the air outlet stop valve 105 in sequence, and then is discharged from the outlet end of the exhaust pipeline; when the gas supply state is just started, because the air pressure in the exhaust pipeline 100 is not large, water flows into the flushing buffer 106 from the outlet end of the exhaust pipeline through the flushing stop valve 104 and the gas outlet stop valve 105; the regulating structure can regulate the pressure in the exhaust pipeline 100 in the air supply state, and can discharge water into the water storage barrel 108 by opening the drain valve 107 when the air supply state is stopped or the water in the flushing buffer 106 is excessive; the water entering the water storage barrel 108 can pass through the water discharge pump 109 and the pressurization structure 150 and then is discharged out of the outlet end of the exhaust pipeline from the air outlet stop valve 105, so that forward flushing is realized, the inner side of the outlet end of the exhaust pipeline is washed, and a certain descaling effect is achieved; the pressure is increased by the pressure regulating structure 130 to enter the positive direction for inflation, and the high pressure air flow can also perform good descaling work on the outlet end and the inner side of the exhaust pipeline.

Further: when the exhaust pipeline 100 works, the air inlet stop valve 103, the flushing stop valve 104 and the air outlet stop valve 105 are all in an open state, the pneumatic flow control valve 101 controls the flow of inlet air, the air pressure detection device 111 is used for detecting air pressure, and the pressure regulating structure 130 is used for regulating the air pressure in the exhaust pipeline 100; after being discharged from the air pump 2, the air passes through the pneumatic flow control valve 101, the pressure regulating structure 130, the air inlet stop valve 103, the check valve 102, the flushing buffer 106, the flushing stop valve 104 and the air outlet stop valve 105 in sequence, and then is discharged from the outlet end of the exhaust pipeline to enter the filter tank 1; the liquid flowing back from the outlet of the exhaust pipe enters the flushing buffer 106 through the flushing stop valve 104 and the air outlet stop valve 105, and then is discharged into the water storage barrel 108 through the drain valve 107, wherein the flushing buffer 106 is an integral pressure-resistant container with a volume of 300 plus 500L, and the volume of the water storage barrel 108 is 5-6 times of the volume of the flushing buffer 106.

The flushing buffer 106 is a pressure-resistant container, so that the flushing buffer can ensure that the flushing buffer is not damaged or deformed when high-pressure gas passes through the flushing buffer, and the volume of the flushing buffer is 300-500L, so that the water storage capacity of one time can be ensured; the volume of the water storage barrel 108 is 5-6 times of the volume of the flushing buffer 106, so that the water storage barrel 108 can store the water volume of one forward flushing to ensure the forward flushing effect.

Further: a filter is arranged at the bottom of the flushing buffer 106; a vacuumizing device 112 is connected to a pipeline connected between the flushing buffer 106 and the air inlet stop valve 103 through a pipeline, and the vacuumizing device 112 is programmed and controlled by a controller; when the vacuum pumping device 112 operates, the flushing stop valve 104 and the air outlet stop valve 105 are opened, and the air inlet stop valve 103 is closed, so that a negative pressure state is formed between the flushing buffer 106 and the air outlet stop valve 105, and therefore, water at the outlet end of the exhaust pipeline flows into the flushing buffer 106 through the flushing stop valve 104 and the air outlet stop valve 105 and then is discharged into the water storage barrel 108 through the filter and the drain valve 107; when the drainage pump 109 operates, the flushing stop valve 104 is closed, the air outlet stop valve 105 is opened, water in the water storage barrel 108 enters a pipeline connected between the flushing stop valve 104 and the air outlet stop valve 105 through the drainage pump 109 and the pressurization structure 150, and then is discharged out of the outlet end of the exhaust pipeline through the air outlet stop valve 105; and a liquid level sensor I113 is arranged in the flushing buffer 106, and a liquid level sensor II 114 is arranged in the water storage bucket 108.

The air inlet stop valve 103 is closed by opening the flushing stop valve 104 and the air outlet stop valve 105, and then the vacuumizing device 112 is started, so that a negative pressure state is formed between the flushing buffer 106 and the air outlet stop valve 105, and water at the outlet of the exhaust pipeline is pressed at the highest speed due to the high water pressure at the outlet of the exhaust pipeline, so that the effect of reverse flushing is achieved, and the descaling effect is further ensured; the liquid level sensor I113 and the liquid level sensor II 114 are electrically connected with the controller, so that the water level in the flushing buffer 106 and the water storage bucket 108 can be kept, and the automatic control of the flap filter chamber is realized by matching with the controller.

Further: the pressurizing structure 150 comprises a water inlet pipe part 151 and a water outlet pipe part 152 which are connected by screw threads, a pressure regulating mechanism is arranged between the water inlet pipe part 151 and the water outlet pipe part 152, a blocking edge 151a is arranged in the water inlet pipe part 151, the blocking edge 151a extends to the end surface of one side of the water inlet pipe part 151 connected with the water outlet pipe part 152, and a water inlet cavity is formed on the inner side of the water inlet pipe part 151 on the blocking edge 151 a; the pressure regulating mechanism comprises a pressure regulating sleeve 153 inserted into a water inlet cavity of the water inlet pipe part 151 and extending out, a limiting part 153a abutting against the end part of the blocking edge 151a is formed on one side of the pressure regulating sleeve 153 positioned in the water inlet pipe part 151, a supporting part 153b abutting against the end surface of the water inlet pipe part 151 is formed on one side of the pressure regulating sleeve 153 positioned outside the water inlet pipe part 151, and a buffer spring 154 is arranged between the limiting part 153a and the blocking edge 151 a; a closed section is formed at the bottom of the pressure regulating sleeve 153, a pressurizing part 155 is formed in the middle of the closed section in an outward extending manner, a pressurizing channel 156 communicated with the pressure regulating sleeve 153 is formed in the pressurizing part 155, and the pressurizing channel 156 does not penetrate through the pressurizing part 155 to enable the bottom of the pressurizing channel 156 to be closed; and a pressurizing hole 157 communicating with the pressurizing passage 156 is formed on a side wall of the pressurizing part 155.

A pressurizing nozzle 158 is fixedly arranged outside the bottom of the pressure regulating sleeve 153, and the pressurizing nozzle 158 is connected to the closed section at the bottom of the pressure regulating sleeve 153 through threads; the pressurizing nozzle 158 is coated with the pressurizing part 155, and the pressurizing channel 156 is positioned in the pressurizing nozzle 158; a plurality of uniformly distributed pressurizing holes 157 are formed in the side wall of the pressurizing part 155, and a water outlet hole 161 is formed in the bottom of the pressurizing nozzle 158; water flows in from the water inlet pipe part 151, passes through the pressure regulating sleeve 153 and flows out through the pressurization part 155, because the bottom of the pressurization channel 156 in the pressurization part 155 is in a closed shape, and the pressurization hole 157 is arranged on the side wall of the pressurization part 155, so that the pressurization channel 156 generates flow resistance to water, thereby increasing the pressure of the water in the pressure regulating sleeve 153, and enabling the buffer spring 154 between the limiting part 153a and the blocking edge 151a to compress under the action of the pressure, and when the water does not pass through, the pressure regulating sleeve 153 resets again.

Further: a conical surface receiving hole 158a is formed in the pressurizing nozzle 158, the water outlet hole 161 is communicated with the conical surface receiving hole 158a, and when water is left from the pressurizing hole 157, the water is subjected to the resistance of the conical surface receiving hole 158a again, so that the pressure of the water is further ensured; the end of the pressurizing nozzle 158 is integrally formed with a pressurizing rod 159, the water outlet 161 extends to the bottom of the pressurizing rod 159 and is positioned at the bottom of the pressurizing rod 159 to form a closed shape, and the side wall of the bottom of the pressurizing rod 159 is provided with a plurality of pressurizing water passing holes 160 which are uniformly distributed according to the circumference and are communicated with the water outlet 161, because the bottom of the water outlet 161 is closed, the water is subjected to resistance again when flowing to the bottom of the water outlet 161 to further increase the pressure of the passing water, so as to ensure the impact force of the water during forward flushing, thereby ensuring a good descaling effect; the outlet pipe 152 comprises a receiving section 152a in threaded connection with the inlet pipe 151 and an outlet section 152b connected with a pipeline, the outlet pipe 152 is fixed on the inlet pipe 151 through the receiving section 152a, and a receiving chamber for the pressurizing nozzle 158 to reciprocate is formed in the receiving section 152 a; the inner wall of the water outlet section 152b is matched with a pressure increasing rod 159, a sealing rubber layer 162 is fixedly arranged on the inner wall of the water outlet section 152b, and the pressure increasing rod 159 is driven by a pressure adjusting sleeve 153 to extend out of the water outlet section 152 b; in the case that the pressurizing structure 150 is not supplied with water, the supporting portion 153b of the pressure regulating sleeve 153 abuts against the end surface of the water inlet pipe portion 151, and the pressurizing rod 159 is located in the water outlet section 152b to cut off the connection with the pipe; when water enters the pressurizing structure 150, the pressure regulating sleeve 153 moves, so that the pressurizing rod 159 extends out of the water outlet section 152b and is connected with the pipeline, and when water does not enter, the pressure regulating sleeve 153 resets, so that the pressurizing rod 159 can reach the water outlet end, and a good sealing and waterproof effect is achieved under the action of the sealing adhesive layer.

Further: the pressure regulating structure 130 comprises a pressure regulating shell 133 with an air inlet 131 and an air outlet 131, a pressure regulating wheel 134, a linear motor 135 and a rotating motor 136; the pressure regulating shell 133 is connected with the pipeline through the air inlet and the air outlet 131, the pressure regulating shell 133 comprises a cylindrical placing part 133a and a truncated cone-shaped regulating part 133b, the air inlet is arranged at the side end of the placing part 133a, the air outlet 131 is arranged at one end with a small diameter of the regulating part 133b, the pressure regulating wheel 134 is arranged in the pressure regulating shell 133, a pressure regulating gap is formed between the pressure regulating wheel 134 and the regulating part 133b of the pressure regulating shell 133, and a driving shaft of the rotating motor 136 extends into the pressure regulating shell 133 and is fixedly connected with the pressure regulating wheel 134, so that the pressure regulating wheel 134 is driven to rotate; a driving plate 137 is fixedly arranged on a driving shaft of the linear motor 135, and the rotating motor 136 is fixedly arranged on the driving plate 137; thereby adjust the pressure regulating clearance between regulating wheel and the regulation portion 133b through linear electric motor 135 to the realization is to the pressure adjustment through pressure regulating structure 130 gas, thereby can play the atmospheric pressure regulation when gas supply state or positive inflation, thereby can ensure the stability of atmospheric pressure under the gas supply state, also can ensure the atmospheric pressure when positive inflation, thereby ensure the scale removal effect when positive inflation.

Further: the regulating wheel is in a sheet shape, the front end of the regulating wheel is provided with a plurality of blades 138 which are uniformly distributed according to the circumference, the blades 138 and the regulating wheel are arranged vertically, the side end of each blade 138 is provided with an inclined cutting part 138a which is matched with the regulating part 133b, the front end of each blade 138 is provided with a pressure regulating disc 138b which is used for connection and reinforcement of the blade 138, the pressure regulating wheels 134 and the pressure regulating discs 138b are arranged in parallel, the pressure regulating structure 130 regulates the size of a pressure regulating gap by changing the position of the pressure regulating disc 138b, and the rotating motor 136 drives the blades 138 on the regulating wheel to rotate, so that the gas passing through the pressure regulating mechanism can be further pressurized; the air inlet and the air outlet 131 are vertically arranged on the pressure regulating shell 133; the inclined cutting part 138a of the blade 138 does not abut against the inner wall of the adjusting part 133b in the moving process of the adjusting wheel, so that good gas passing can be ensured; a support rod for limiting and supporting is arranged between the linear motor 135 and the pressure regulating shell 133; a cake-shaped mounting part 139 protruding outwards is arranged on the end face of the mounting part 133a, a connecting hole 140 penetrating into the mounting part 133a is coaxially arranged on the mounting part 139, a driving shaft of the rotating motor 136 is inserted into the mounting part 133a through the connecting hole 140, a plurality of coaxially arranged mounting grooves 141 are arranged in the connecting hole 140, and sealing elements 142 are arranged in the mounting grooves 141; the section of the sealing element 142 is rectangular, a bearing groove 143 is formed in the inner side wall of the sealing element 142, a support ring 144 is arranged on the bearing groove 143, and the cross section of the support ring 144 is type and is made of a spring steel sheet; both sides of the bearing groove 143 on the inner side wall of the sealing element 142 are provided with sealing grooves 154 with trapezoidal cross sections, sealing ribs 146 which are matched with each other are arranged in the sealing grooves 154, the bearing groove 143 is filled with lubricating grease, the sealing performance between the driving shaft of the rotating motor 136 and the pressure regulating shell can be ensured through the arrangement of the sealing element 142, and the driving shaft can be lubricated to a certain extent, so that the abrasion of the driving shaft of the rotating motor 136 is reduced.

Further: the air pump 2 and the exhaust pipeline 100 supply air and remove scale to the outlet end of the exhaust pipeline, when the controller detects that the flow of the total gas discharged from the outlet end of the exhaust pipeline in unit time is reduced through the flow detection device 110, the controller judges that the outlet end of the exhaust pipeline is blocked by scale, and controls the air pump 2 and the exhaust pipeline 100 to remove scale; when the air pump 2 is in an air supply state, the pneumatic flow control valve 101, the air inlet stop valve 103, the flushing stop valve 104 and the air outlet stop valve 105 of the exhaust pipeline 100 are all in an open state, the air pump 2 is in an open state, the drainage pump 109 is in a closed state, the vacuum pumping device 112 is in a stop state, the linear motor 135 is in a stop state, the driving shaft is in a retraction state, and the rotating motor 136 is in a stop state; when the flow detection device 110 detects that the flow of the gas discharged from the outlet end of the exhaust pipeline is reduced in unit time, the controller directly switches from the gas supply state to the descaling state;

the control method of the descaling state comprises the following steps:

s1, flushing reversely, wherein the controller controls to close the air pump 2, the pneumatic flow control valve 101 and the air inlet stop valve 103 and open the vacuumizing device 112, so that negative pressure is formed in a pipeline from the flushing buffer 106 to the outlet end section of the exhaust pipeline, water outside the outlet end of the exhaust pipeline presses the exhaust pipeline at the highest speed under the action of pressure so as to perform preliminary descaling on the outlet end of the exhaust pipeline and the inner wall of the pipeline at the inner side of the exhaust pipeline until a liquid level sensor in the flushing buffer 106 senses that the water reaches a limit value, then closing the air inlet stop valve 103 and the vacuumizing device 112, then opening the drain valve 107 and discharging the water in the flushing buffer 106 into the water storage barrel 108 until the water in the flushing buffer 106 is discharged completely, and then closing the drain valve 107;

s2, positive air charging is carried out, the controller opens the air pump 2, the pneumatic flow control valve 101 and the air inlet stop valve 103 and drives the linear motor 135 and the rotary motor 136 to operate, high-pressure air is blown out from a pipeline on the inner side of the outlet end of the exhaust pipeline, and secondary descaling is achieved, wherein the controller is provided with time for primary positive air charging;

s3, directional flushing and positive inflation are circulated for multiple times, and when the positive inflation time of the step S2 is reached, the step S1 is switched again; the controller is provided with the number of cycles between S1 and S2, and the number of cycles is 2-3;

s4, flushing in the positive direction, wherein when the cycle number of the step S3 reaches, the pneumatic flow control valve 101, the air inlet stop valve 103, the flushing stop valve 104 and the air outlet stop valve 105 are closed; then the drainage pump 109 is started for several seconds, and then the air outlet stop valve 105 is opened, so that the water pressurized by the drainage pump 109 and the pressurization structure 150 is discharged through the air outlet stop valve 105 and the outlet end of the exhaust pipeline, and final descaling is carried out until the water in the water storage barrel 108 is emptied;

s5, detecting air supply, wherein the controller controls the exhaust pipeline 100 and the air pump 2 to enter the air supply state, and during the period, the controller continuously obtains the flow rate in unit time detected by the flow rate detection device 110;

s6, removing the dirt or giving an alarm, and entering a dirt removing mode when the flow is detected to be normal within the set time; and when the flow rate is not detected to be recovered to be normal within the set time, the step S1 is performed again, the number of the cycles is one, the step S6 is performed, the flow rate is detected to be recovered to be normal within the set time, the dirt removing mode is performed, and the alarm mode is performed when the flow rate is not detected to be recovered to be normal within the set time. The positive flushing and the positive inflation are carried out for multiple cycles and then the water enters the positive flushing, so that the descaling effect is ensured, and the integral operation of the water and gas distribution system of the flap filter can be facilitated; the control cabinet is externally provided with a display (HMI) for the water and gas distribution system of the flap filter in a similar state, the controller is in communication connection with the display, and the running state of the water and gas distribution system can be conveniently checked through the adaptation. The air pump, the backwashing water pump, the vacuumizing device and the draining pump are controlled by corresponding frequency converters which are programmed and controlled by the controller; the linear motor and the rotary motor are controlled by corresponding servo controllers, and the servo controllers are controlled by the controllers in a programming mode.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a board filtering pond water distribution gas distribution system turns over, includes filtering ponds (1), air pump (2), back flush water pump (3) and switch board, characterized by: the water inlet channel (4) is arranged at the upper end of the filtering tank (1), the water outlet (5) for discharging filtered liquid is arranged at the lower end of the filtering tank, a flap valve (6) for backwashing drainage is arranged on the side wall of the filtering tank (1), a drainage channel (8) is arranged on the outer side of the flap valve (6), the air pump (2) and the backwashing water pump (3) are respectively connected to the bottom of the filtering tank through corresponding pipelines, a water outlet turbidity meter (7) is arranged at the water outlet (5), a drainage turbidity meter (9) is arranged at the drainage channel (8), and an air blowing floating pipe (10) with the air blowing direction opposite to that of the flap valve (6) is arranged in the side wall of the filtering tank; the control cabinet is internally provided with a control circuit and a controller, the work of the filter tank is controlled by the controller in a programming way, wherein the controller is a PLC;

the air pump (2) is connected with the bottom of the filter tank through an exhaust pipeline (100); the exhaust pipeline (100) comprises a pneumatic flow control valve (101), a pressure regulating structure (130), a check valve (102), an air inlet stop valve (103), a flushing buffer (106), a flushing stop valve (104) and an air outlet stop valve (105) which are sequentially connected through pipelines from the air pump (2) to the bottom of the filter tank;

the top of a flushing buffer (106) is connected with an air inlet stop valve (103) through a pipeline, the side part of the upper end of the flushing buffer (106) is connected with a flushing stop valve (104) through a pipeline, a drain valve (107) is arranged at the bottom of the flushing buffer (106), the bottom of the drain valve (107) is connected with a water storage barrel (108) through a pipeline, the bottom of the water storage barrel (108) is connected with a drain pump (109) through a pipeline, the outlet end of the drain pump (109) is connected with a pressurizing structure (150), and the outlet end of the pressurizing structure (150) is connected to a pipeline connected between the flushing stop valve (104) and an air outlet stop valve (105) through a pipeline; a flow detection device (110) is arranged on a pipeline connected with the air outlet stop valve (105) and the bottom of the filter tank, and an air pressure detection device (111) is arranged on a pipeline connected between the check valve (102) and the pressure regulating structure (130); the pneumatic flow control valve (101), the pressure regulating structure (130), the air inlet stop valve (103), the flushing stop valve (104), the air outlet stop valve (105) and the drain valve (107) are controlled by a controller;

when the exhaust pipeline (100) works, the air inlet stop valve (103), the flushing stop valve (104) and the air outlet stop valve (105) are all in an open state, the pneumatic flow control valve (101) controls the flow of inlet air, the air pressure detection device (111) is used for detecting air pressure, and the pressure regulating structure (130) is used for regulating the air pressure in the exhaust pipeline (100); after being discharged from the air pump (2), the air passes through a pneumatic flow control valve (101), a pressure regulating structure (130), an air inlet stop valve (103), a check valve (102), a flushing buffer (106), a flushing stop valve (104) and an air outlet stop valve (105) in sequence, and then is discharged from the outlet end of an exhaust pipeline at the bottom of the filter tank to enter the filter tank (1); the liquid which flows back from the bottom of the filter tank enters a flushing buffer through a flushing stop valve (104) and an air outlet stop valve (105) and then is discharged into a water storage barrel (108) through a drain valve (107), the flushing buffer (106) is an integral pressure-resistant container with the volume of 300 plus 500L, and the volume of the water storage barrel (108) is 5-6 times of the volume of the flushing buffer (106).

2. The water and gas distribution system of the flap filter according to claim 1, which is characterized in that: a vacuumizing device (112) is connected to a pipeline connected between the flushing buffer (106) and the air inlet stop valve (103) through a pipeline, when the vacuumizing device (112) operates, the flushing stop valve (104) and the air outlet stop valve (105) are opened, and the air inlet stop valve (103) is closed, so that a negative pressure state is formed between the flushing buffer (106) and the air outlet stop valve (105), and therefore water at the bottom of the filter tank flows into the flushing buffer (106) through the flushing stop valve (104) and the air outlet stop valve (105) and then is discharged into the water storage barrel (108) through the drain valve (107); when the drainage pump (109) operates, the flushing stop valve (104) is closed, the air outlet stop valve (105) is opened, water in the water storage barrel (108) enters a pipeline connected between the flushing stop valve (104) and the air outlet stop valve (105) through the drainage pump (109) and the pressurization structure (150), and then is discharged out of the bottom of the filter tank through the air outlet stop valve (105); and a liquid level sensor I (113) is arranged in the flushing buffer (106), and a liquid level sensor II (114) is arranged in the water storage barrel (108).

3. The water and gas distribution system of the flap filter according to claim 2, which is characterized in that: the pressurizing structure (150) comprises a water inlet pipe part (151) and a water outlet pipe part (152) which are connected in a threaded manner, a pressure regulating mechanism is arranged between the water inlet pipe part (151) and the water outlet pipe part (152), a blocking edge (151 a) is arranged in the water inlet pipe part (151), the blocking edge (151 a) extends to the end face of one side, connected with the water outlet pipe part (152), of the water inlet pipe part (151), and a water inlet cavity is formed in the position, located on the inner side of the blocking edge (151 a), of the water inlet pipe part (151); the pressure regulating mechanism comprises a pressure regulating sleeve (153) inserted into a water inlet cavity of the water inlet pipe part (151) and extending out, a limiting part (153 a) abutting against the end part of the blocking edge (151 a) is formed on one side of the pressure regulating sleeve (153) positioned in the water inlet pipe part (151), a supporting part (153 b) abutting against the end surface of the water inlet pipe part (151) is formed on one side of the pressure regulating sleeve (153) positioned outside the water inlet pipe part (151), and a buffer spring (154) is arranged between the limiting part (153 a) and the blocking edge (151 a); a closed section is formed at the bottom of the pressure regulating sleeve (153), a pressurization part (155) is formed in the middle of the closed section in an outward extending mode, a pressurization channel (156) communicated with the pressure regulating sleeve (153) is formed in the pressurization part (155), and the pressurization channel (156) does not penetrate through the pressurization part (155) to enable the bottom of the pressurization channel (156) to be closed; and a pressurizing hole (157) communicated with the pressurizing channel is formed on the side wall of the pressurizing part (155).

4. The water and gas distribution system of the flap filter according to claim 3, which is characterized in that: a pressurizing nozzle (158) is fixedly arranged outside the bottom of the pressure regulating sleeve (153), and the pressurizing nozzle (158) is connected to the closed section at the bottom of the pressure regulating sleeve (153) through threads; the pressurizing nozzle (158) is coated with the pressurizing part (155), and the pressurizing channel (156) is positioned in the pressurizing nozzle (158); a plurality of uniformly distributed pressurizing holes (157) are formed in the side wall of the pressurizing part (155), and a water outlet hole (161) is formed in the bottom of the pressurizing nozzle (158); water flows in from inlet pipe portion (151), through pressure regulating sleeve (153), and flow out through pressure boosting portion (155), because the bottom of pressure boost passageway (156) in pressure boosting portion (155) is for the closure form, and pressure boost hole (157) set up on the lateral wall of pressure boosting portion (155), make pressure boost passageway (156) to the aquatic production flow resistance, thereby increase the pressure of pressure regulating sleeve (153) water-logging, and make under the pressure effect be located spacing portion (153 a) and keep off the buffer spring (154) compression between edge (151 a).

5. The water and gas distribution system of the flap filter according to claim 4, which is characterized in that: a conical surface bearing hole (158 a) is formed in the pressurizing nozzle (158), and the water outlet hole (161) is communicated with the conical surface bearing hole (158 a); a pressurizing rod (159) is integrally formed at the end part of the pressurizing nozzle (158), the water outlet hole (161) extends to the bottom of the pressurizing rod (159) and is positioned at the bottom of the pressurizing rod (159) to form a closed shape, and a plurality of pressurizing water passing holes (160) which are uniformly distributed according to the circumference and are communicated with the water outlet hole (161) are arranged on the side wall of the bottom of the pressurizing rod (159); the water outlet pipe part (152) comprises a bearing section (152 a) in threaded connection with the water inlet pipe part (151) and a water outlet section (152 b) connected with a pipeline, the water outlet pipe part (152) is fixed on the water inlet pipe part (151) through the bearing section (152 a) in a threaded manner, and a bearing chamber (152 c) for the pressurizing spray head (158) to reciprocate is formed in the bearing section (152 a); the inner wall of the water outlet section (152 b) is matched with the pressure increasing rod (159), a sealing rubber layer (162) is fixedly arranged on the inner wall of the water outlet section (152 b), and the pressure increasing rod (159) is driven by the pressure adjusting sleeve (153) to extend out of the water outlet section (152 b).

6. The water and gas distribution system of the flap filter according to claim 5, which is characterized in that: the pressure regulating structure (130) comprises a pressure regulating shell (133) with an air inlet (131) and an air outlet (132), a pressure regulating wheel (134), a linear motor (135) and a rotating motor (136), the pressure regulating shell (133) is connected with a pipeline through the air inlet (131) and the air outlet (132), the pressure regulating shell (133) comprises a cylindrical arrangement part (133 a) and a circular truncated cone-shaped regulating part (133 b), the air inlet (131) is arranged at the side end of the arrangement part (133 a), and the air outlet (132) is arranged at one end with a small diameter of the regulating part (133 b); the pressure regulating wheel (134) is arranged in the pressure regulating shell (133), a pressure regulating gap is formed between the pressure regulating wheel and a regulating part (133 b) of the pressure regulating shell (133), and a driving shaft of the rotating motor (136) extends into the pressure regulating shell (133) and is fixedly connected with the pressure regulating wheel (134), so that the pressure regulating wheel (134) is driven to rotate; the driving shaft of the linear motor (135) is fixedly provided with a driving plate (137), and the rotating motor (136) is fixedly arranged on the driving plate (137).

7. The water and gas distribution system of the flap filter according to claim 6, which is characterized in that: the front end of the pressure regulating wheel (134) is provided with a plurality of blades (138) which are uniformly distributed according to the circumference, the blades (138) and the pressure regulating wheel (134) are arranged vertically, the side end of each blade (138) is provided with an inclined plane cutting part (138 a) matched with the regulating part (133 b), the front end of each blade (138) is provided with a pressure regulating disc (138 b) used for connection and reinforcement of the blade, the pressure regulating wheel and the pressure regulating disc are arranged in parallel, and the pressure regulating structure regulates the size of a pressure regulating gap by changing the position of the pressure regulating disc (138 b); the air inlet (131) and the air outlet (132) are vertically arranged on the pressure regulating shell (133); a supporting rod for limiting and supporting is arranged between the linear motor (135) and the pressure regulating shell (133); an outward convex disc-shaped mounting part (139) is arranged on the end face of the mounting part (133 a), a connecting hole (140) penetrating into the mounting part (133 a) is coaxially arranged on the mounting part (139), a driving shaft of the rotating motor (136) is inserted into the mounting part (133 a) through the connecting hole (140), a plurality of coaxially arranged mounting grooves (141) are arranged in the connecting hole (140), and sealing elements (142) are arranged in the mounting grooves (141); the cross-section of sealing member (142) be the rectangle, sealing member (142) inside wall is provided with accepts groove (143), is provided with support ring (144) on accepting groove (143), the cross-section of support ring (144) is type, all is provided with cross-section trapezoidal seal groove (145) in the both sides of sealing member (142) inside wall and position accepting groove (143), be provided with the sealing rib (146) of looks adaptation in seal groove (145), and accept groove (143) intussuseption be filled with lubricating grease.

8. The water and gas distribution system of the flap filter according to claim 7, which is characterized in that: the air pump (2) and the exhaust pipeline (100) supply air to and remove scale from the outlet end of the exhaust pipeline at the bottom of the filter tank, and when the controller detects that the flow of the air discharged from the outlet end of the exhaust pipeline in unit time is reduced through the flow detection device (110), the controller judges that the inlet end of the pipeline at the bottom of the filter tank is blocked by scale and controls the air pump (2) and the exhaust pipeline (100) to remove scale; when the air pump (2) is in an air supply state, the pneumatic flow control valve (101), the air inlet stop valve (103), the flushing stop valve (104) and the air outlet stop valve (105) of the exhaust pipeline (100) are all in an open state, the air pump (2) is in an open state, the drainage pump (109) is in a closed state, the vacuumizing device (112) is in a stop state, the linear motor (135) is in a stop state, the driving shaft is in a retraction state, and the rotating motor (136) is in a stop state;

the control method of the descaling state comprises the following steps:

s1, flushing water reversely, wherein the controller controls to close the air pump (2), the pneumatic flow control valve (101), the air inlet stop valve (103) and open the vacuumizing device (112), so that negative pressure is formed in a pipeline from the flushing buffer (106) to the outlet end section of the exhaust pipeline at the bottom of the filter tank, water outside the bottom of the filter tank is pressed into the outlet end of the exhaust pipeline at the bottom of the filter tank at the extreme speed under the action of pressure so as to perform primary descaling on the inlet end of the exhaust pipeline and the inner side pipeline inner wall of the exhaust pipeline until a liquid level sensor in the flushing buffer (106) senses that the water reaches a limit value, then closing the air inlet stop valve (103) and the vacuumizing device (112), opening the drain valve (107) to discharge the water in the flushing buffer (106) into the water storage barrel (108), and closing the drain valve (107) until the water in the flushing buffer (106) is discharged completely;

s2, positive air charging is carried out, the controller opens the air pump (2), the pneumatic flow control valve (101) and the air inlet stop valve (103) and drives the linear motor (135) and the rotary motor (136) to operate, so that high-pressure air is blown out from a pipeline on the inner side of the outlet end of the exhaust pipeline at the bottom of the filter tank, and secondary descaling is realized, wherein the controller is provided with time for primary positive air charging;

s3, the forward flushing and the forward inflating are circulated for a plurality of times, and when the forward inflating time of the step S2 is reached, the step S1 is switched again; the controller is provided with the number of cycles between S1 and S2;

s4, flushing in the positive direction, and closing the pneumatic flow control valve (101), the air inlet stop valve (103), the flushing stop valve (104) and the air outlet stop valve (105) when the number of cycles of the step S3 reaches; then starting the drainage pump (109) for several seconds, and then opening the air outlet stop valve (105), so that the water pressurized by the drainage pump (109) and the pressurization structure (150) is discharged through the air outlet stop valve (105) and the outlet end of the exhaust pipeline at the bottom of the filter tank, and finally descaling is carried out until the water in the water storage barrel (108) is emptied;

s5, detecting air supply, wherein the controller controls the exhaust pipeline (100) and the air pump (2) to enter an air supply state, and continuously acquires the flow in unit time detected by the flow detection device (110) during the period;