CN203954801U - The large flow self-cleaning net type filter of micro-head - Google Patents

Abstract

The utility model discloses a self-cleaning mesh filter with a small water head and a large flow rate, which comprises a vertical tank body with a water inlet and a water outlet, and an upper bearing and a lower bearing arranged through the vertical tank body cooperate to install a shaft with a rotating shaft at the upper end. Sewage pipe, the shaft of the sewage pipe driven by the deceleration motor, the screw set on the shaft cooperates with the fixing nut on the support, the guide chain groove on the shaft cooperates with the guide chain of the rotor of the deceleration motor, the contact plate on the shaft and the limit device To match, the conical filter screen with the upper opening matched with the inner wall of the vertical tank is installed on the horizontal partition, and the sewage suction nozzles evenly distributed on the sewage pipe are respectively matched with the conical filter screen. The blowdown pipe protruding from below is located in the cleaning chamber, and an electromagnetic blowdown valve is installed on the discharge pipe of the cleanout chamber extending out of the vertical tank body. It can realize the automatic cleaning of the filter, no special personnel are required, only a small amount of water and low water pressure are needed for cleaning, the cleaning time is short, the filtration efficiency is high, and the normal operation of the system will not be affected during cleaning.

Description

Self-cleaning screen filter with micro head and large flow

technical field

The utility model belongs to the improvement of a water-saving irrigation water filter device, in particular to a self-cleaning net filter with a small water head and a large flow rate. the

Background technique

Xinjiang is a typical arid oasis irrigated agricultural area, and the construction of water-saving agriculture is the key to sustainable agricultural development. Xinjiang has an area of 75 million mu of cultivated land. As of 2011, about 30 million mu of high-efficiency water-saving area has been built, mainly using groundwater pressurized drip irrigation technology. According to Xinjiang's "Twelfth Five-Year" hydraulic development plan, Xinjiang will add 3 million mu of high-efficiency water-saving irrigation area every year. With the expansion of the water-saving area, the processing capacity and requirements of the drip irrigation head filter will be higher. According to the power form, the drip irrigation head filter is divided into two types: self-pressure self-cleaning and electric drive cleaning. According to the form of the filter, it is divided into three types: net filter, media filter and laminated filter, among which net filter is the most widely used. the

The self-cleaning mesh filter currently used is divided into self-pressure cleaning and electric drive cleaning. The advantage of self-pressure cleaning is that it does not require external power, but it must require a certain amount of water pressure to achieve it. The advantages and disadvantages of electric drive cleaning are just the opposite of pressure cleaning. the

Utility model content

The purpose of this utility model is to provide a self-cleaning mesh filter with a small water head and a large flow rate, which can realize the automatic cleaning of the filter, does not need to be equipped with a special person, only needs a small amount of water and a very low water pressure during cleaning, and the cleaning time is short , the filtration efficiency is high, and the normal operation of the system will not be affected when cleaning. the

The purpose of this utility model is achieved in this way: a self-cleaning screen filter with a small water head and a large flow rate includes a vertical tank body with a water inlet and a water outlet. The upper bearing set on the upper cover of the body and the lower bearing on the transverse diaphragm cooperate to install the sewage pipe with a rotating shaft at the upper end. The set screw is matched with the fixed nut set on the support, the guide chain groove on the rotating shaft is matched with the guide chain in the center hole of the geared motor rotor, and the contact plate set on the upper end of the rotating shaft is matched with the limit device. A conical filter with an upper opening matching the inner wall of the vertical tank is installed, and the sewage suction nozzles evenly distributed on the sewage pipe are respectively matched with the conical filter. In the dirty room, an electromagnetic blowdown valve is installed on the discharge pipe of the clean room extending out of the vertical tank. the

In the utility model, a conical precision filter screen is installed in the tank body, and a sewage discharge hollow pipe with several sewage suction nozzles is installed in the precision filter screen, and a transmission bearing with a smooth surface is installed on the top of the sewage discharge hollow pipe, which is sealed by a sealing ring and extends out of the filter. Externally, it is connected with a bearing whose lower end is a screw rod and whose upper end is a keyway. The screw rod is matched with the nut fixed on the base, the keyway is matched with the reducer connected to the motor, the top of the reducer is connected with the end of the keyway with a positioning plate, and the positioning plate runs between the upper limit and the lower limit. A pressure sensor probe and a differential pressure sensor probe are respectively installed inside the water inlet tank body and the water outlet tank body. The utility model self-cleaning screen filter with micro-water head and large flow adopts a conical filter screen. When water flows through the filter screen, the centrifugal force generated by the filter screen and the gravity of the sediment particles, as well as the filter screen composed of 3 layers of stainless steel , three kinds of sand-retaining methods comprehensively retain sand, which is much better than the traditional cylindrical filter, and the cleaning water consumption is less, the working pressure is lower than that of imported equipment, the cleaning time is short, and the normal operation of the system is not affected during cleaning. Work. the

The working principle of the utility model is: when the primary filtered water of the sedimentation tank enters the conical filter screen from the water inlet, the impurities with larger particles will flow through the conical filter screen, and will be thrown out by centrifugal force, along the The surface of the filter screen slides down to the sand outlet due to its own gravity, ensuring that the small particles of impurities left on the conical filter screen will not block the sewage suction nozzle. At this time, the clean water is filtered through the filter screen and then discharged from the water outlet. When the filter works for a stage or the water quality entering the filter cavity is poor, when there is more dirt attached to the inner wall of the conical filter, the amount of water filtered through the conical filter decreases, causing the inner and outer cavities of the conical filter to produce When a certain pressure difference is reached, the pressure difference sensor starts, and the controller drives the deceleration motor and the solenoid valve to work at the same time. During the rotating process of the conical filter, the dirt on the filter is sucked away, and the water entrained with the dirt enters the hollow shaft under the action of water pressure, and is discharged through the hollow tube through the solenoid valve. When the geared motor drives the drive shaft to rotate, the screw section of the drive shaft cooperates with the fixed nut on the support seat to push the drive shaft forward, and the guide keyway section of the drive shaft is restrained by the guide key in the center hole of the geared motor rotor , sliding forward in the transmission, so that the suction nozzle of the hollow sewage suction pipe moves forward while rotating; when the contact disc of the transmission shaft moving forward in the transmission touches the limiter on the geared motor, the controller controls The geared motor is reversed, and the nut is fixed on the support seat so that the transmission shaft drives the hollow shaft to reverse. When the contact plate on the reversed transmission shaft touches the limiter on the lower side of the geared motor, the geared motor rotates forward and automatically reciprocates. When the dirt on the conical filter is exhausted and the pressure difference between the inner and outer chambers tends to be similar or equal, the geared motor stops working at this time. The working time and intermittent time of cleaning the filter screen of the utility model can be arbitrarily set through the controller panel. The utility model realizes automatic cleaning of the filter with a high degree of automation, does not need to be equipped with special personnel, only needs a small amount of water and low water pressure during cleaning, and the cleaning time is short, and the normal operation of the system is not affected during cleaning. When the filter is being cleaned, the normal water supply is uninterrupted, and the self-cleaning time only needs 20-40 seconds, which has no effect on the normal water supply. The control method can be diversified, and the electric control panel can meet various requirements: controllable pressure difference or time for cleaning, continuous cleaning is also possible, and the filter drain valve will automatically open when the pressure suddenly rises to a dangerous pressure Pressure relief to protect the safety of the system. the

The utility model realizes the self-cleaning of the filter, does not need to be equipped with a special person, only needs a small amount of water and a very low water pressure during cleaning, the cleaning time is short, the filtering efficiency is improved, and the normal operation of the system is not affected during cleaning. the

Description of drawings

The utility model will be further described below in conjunction with the accompanying drawings, and Fig. 1 is a schematic cross-sectional structure diagram of the utility model. the

Detailed ways

A self-cleaning screen filter with a small water head and a large flow rate, as shown in Figure 1, includes a vertical tank body 8 with a water inlet 12 and a water outlet 19, and a transverse partition 14 is arranged at the lower part thereof, and the vertical tank body 8 passes through the vertical tank body. The upper bearing 9 arranged on the upper cover of the body 8 and the lower bearing 16 on the transverse partition 14 cooperate to install the sewage pipe 11 with a rotating shaft at the upper end, and the geared motor 4 installed on the support drives to pass through the upper cover of the vertical tank body 8. The shaft of the sewage pipe, the screw provided in the middle of the shaft cooperates with the fixed nut 7 provided on the support, the guide chain groove 6 on the shaft cooperates with the guide chain in the center hole of the rotor of the geared motor 4, and the contact plate 5 provided at the upper end of the shaft matches with Cooperate with the limit device, the conical filter screen 15 with the upper opening and the inner wall of the vertical tank body 8 is installed on the transverse partition 14, and the sewage suction nozzles 13 evenly distributed on the sewage pipe 11 are respectively connected with the conical filter. Net 15 cooperates, and the blowdown pipe 11 that stretches out from diaphragm 14 below is positioned at cleaning chamber 18, and electromagnetic blowdown valve 17 is installed on the discharge pipe of stretching out the blowdown chamber 18 of vertical tank body 8. Conical filter screen 15 is made of 1-3 layers of stainless steel filter screen. A pressure sensor probe is installed at the water inlet in the vertical tank body 8 . A differential pressure sensor probe is installed at the water outlet in the vertical tank body 8 . A sealing ring 10 is installed on the upper bearing 9 matched with the rotating shaft. A shield 1 is arranged on the reducer of the geared motor 4 . The structure of the limit device is that an upper stopper 2 and a lower stopper 3 are arranged on the column fixed on the support, and the contact disc 5 cooperates with the upper stopper 2 and the lower stopper 3 respectively. the

Claims (5)

1. the large flow self-cleaning net type filter of micro-head, the vertical tank body (8) that comprises there is water inlet (12) and delivery port (19), bottom is arranging diaphragm plate (14) within it, by covering upper bearing (metal) (9) and the cooperation of the lower bearing (16) on diaphragm plate (14) of setting on vertical tank body (8), the blow-off pipe (11) that upper end has rotating shaft is installed, the reducing motor of installing by bearing (4) drives the blow-off pipe rotating shaft that passes vertical tank body (8) upper cover, the screw rod arranging at rotating shaft middle part matches with the hold-down nut arranging on bearing (7), guiding key way (6) in rotating shaft matches with the drag chain of reducing motor (4) rotor bore, the contact disc (5) that rotating shaft upper end arranges matches with stopping means, it is characterized in that: the conical filter screen (15) that suitable for reading and vertical tank body (8) inwall matches is installed on diaphragm plate (14), pollution-absorbing nozzle (13) in the upper uniform setting of blow-off pipe (11) matches with conical filter screen (15) respectively, the blow-off pipe (11) stretching out from diaphragm plate (14) below is positioned at decontamination chamber (18), on the discharge pipe of decontamination chamber (18) that stretches out vertical tank body (8), electromagnetism blowoff valve (17) is installed.

2. the large flow self-cleaning net type filter of a kind of micro-head according to claim 1, is characterized in that: conical filter screen (15) consists of 1-3 layer stainless steel filtering net.

3. the large flow self-cleaning net type filter of a kind of micro-head according to claim 1, is characterized in that: the water inlet in vertical tank body (8) is installed with pressure sensor probe.

4. the large flow self-cleaning net type filter of a kind of micro-head according to claim 1, is characterized in that: the water outlet in vertical tank body (8) is installed with differential pressure pickup probe.

5. the large flow self-cleaning net type filter of a kind of micro-head according to claim 1, is characterized in that: sealing ring (10) is installed on the upper bearing (metal) matching with rotating shaft (9).