CN215085256U - Automatic back flush filter - Google Patents

Abstract

An automatic back-flushing filter, a feed inlet pipe is arranged on a shell, a rigid filter screen is arranged in the shell at the lower part of a liquid mixing cavity, sealing rings are arranged between the upper end and the lower end of the rigid filter screen and the shell, and a discharge outlet pipe is arranged on the outer side surface of the shell; the central point puts and is equipped with the speed reducer above the casing, the speed reducer links to each other with the motor, the output shaft of speed reducer links to each other with hollow main shaft downwards, be equipped with on the hollow main shaft lateral surface with a plurality of siphunculus and a plurality of horizontal guide arm of intercommunication in the hollow main shaft, the siphunculus is linked together with unsteady suction nozzle, horizontal guide arm passes unsteady suction nozzle top-mounting on the inner wall of rigid filter screen, the cover is equipped with the spring on the horizontal guide arm, below the hollow main shaft through passing below the casing pipeline with arrange the cinder notch pipe and be linked together, arrange the cinder solenoid valve in the exit of cinder notch pipe and be equipped with, be equipped with the control box on the casing outside, the utility model discloses simple structure shortens the back flush time of filter when the back flush greatly, improves back flush efficiency, has good economy and social.

Description

Automatic back flush filter

Technical Field

The utility model relates to a filtration purification field, especially an automatic back flush filter.

Background

The automatic backwashing filter is widely applied to chemical industry, water treatment, medicine and other industries. The automatic backwashing filter on the market at present has various types, but has an obvious defect that backwashing time is relatively long, generally more than ten seconds to dozens of seconds, and consumption of media required by backwashing is relatively large, so that the automatic backwashing filter can be used on a water treatment system and can be accepted, but when the automatic backwashing filter is applied to a chemical system, production cost is high, more liquid waste is generated, particularly, more expensive chemical materials can not be accepted, and the consumption is relatively large. Therefore, it is imperative that the apparatus be capable of substantially reducing backwash liquid consumption by making structural improvements and innovations in the filter.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming the defect of prior art, the utility model aims at providing an automatic back flush filter, can effectively solve the current automatic back flush and filter in the backwash medium consume too big, the side leakage among the back flush process too many leads to the problem of back flush inefficiency.

In order to achieve the purpose, the technical scheme of the utility model is that, the automatic backwashing filter comprises a shell, a motor and a control box, wherein, the side surface of the lower part of the shell is provided with evenly distributed support legs, the upper part of the outer side surface of the shell is provided with a feed inlet pipe communicated with a liquid mixing cavity at the upper part in the shell, rigid filter screens are concentrically arranged in the shell at the lower part of the liquid mixing cavity at intervals, sealing rings are arranged on the rigid filter screens and between the lower ends of the rigid filter screens and the shell, a liquid purifying cavity is formed between the outer wall of the rigid filter screens and between the upper sealing rings and the lower sealing rings, and the outer side surface of the shell is provided with a discharge outlet pipe communicated with the liquid purifying cavity;

the central position on the shell is provided with a speed reducer, the input shaft of the speed reducer is connected with the rotating shaft of the motor, the output shaft of the speed reducer extends downwards into the center of the shell, the floating structure of the floating suction nozzle is formed by sleeving a spring on the transverse guide rod between the floating suction nozzle and the hollow main shaft, the lower surface of the hollow main shaft is communicated with a slag discharge opening pipe through a pipeline passing through the lower surface of the shell, a slag discharge electromagnetic valve is arranged at an outlet of the slag discharge opening pipe, a control box is arranged outside the shell, and the slag discharge electromagnetic valve, a speed reducer and a motor are respectively connected with the control box to form an automatic control device.

The utility model discloses simple structure shortens the back flush time of filter when the back flush greatly, greatly reduces the side leakage of back flush in-process, improves back flush efficiency, has good economy and social.

Drawings

Fig. 1 is a schematic structural view (half-section) of the present invention.

Fig. 2 is a schematic view of the rigid filter screen structure of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

The automatic backwashing filter comprises a shell, a motor and a control box, wherein the side surface of the lower part of the shell 1 is provided with uniformly distributed supporting legs 14, the upper part of the outer side surface of the shell 1 is provided with a feed inlet pipe 17 communicated with an upper liquid mixing cavity 101 in the shell 1, rigid filter screens 2 are concentrically arranged in the shell 1 at the lower part of the liquid mixing cavity 101 at intervals, sealing rings are arranged between the upper end and the lower end of each rigid filter screen 2 and the shell 1, a liquid purifying cavity 102 is formed between the inner wall of the shell 1 and the outer wall of each rigid filter screen 2 as well as between the upper end sealing ring and the lower end sealing ring, and the outer side surface of the shell 1 is provided with a discharge outlet pipe 18 communicated with the liquid purifying cavity 102;

a speed reducer 8 is arranged at the center of the upper surface of the shell 1, the input shaft of the speed reducer 8 is connected with the rotating shaft of a motor 10, the output shaft of the speed reducer 8 extends downwards into the center of the shell 1 and is connected with a hollow main shaft 5 vertically arranged in the center of the shell 1 through a coupling 6, a plurality of through pipes 16 and a plurality of transverse guide rods which are communicated with the hollow main shaft 5 are arranged on the outer side surface of the hollow main shaft 5 arranged in the rigid filter screen 2, the through pipes 16 are communicated with a floating suction nozzle 3, the transverse guide rods penetrate through the floating suction nozzle 3 and are arranged on the inner wall of the rigid filter screen 2, springs 4 are sleeved on the transverse guide rods between the floating suction nozzle 3 and the hollow main shaft 5 to form a floating structure of the floating suction nozzle, the lower surface of the hollow main shaft 5 is communicated with a slag discharge pipe 21 through a pipeline arranged below the shell 1, a slag discharge electromagnetic valve 13 is arranged at the outlet of the slag discharge pipe 21, and a control box 12 is arranged outside the shell 1, the slag discharge electromagnetic valve 13, the speed reducer 8 and the motor 10 are respectively connected with the control box 12 to form an automatic control device.

In order to ensure better implementation effect, a resistance measuring instrument 11 (known and commercially available products) which is in contact with the outer wall of the rigid filter screen 2 is arranged outside the shell 1, the resistance measuring instrument 11 is connected with a signal input end of a control box 12, a pressure transmitter is adopted at a high end point of the resistance measuring instrument generally, a resistance value can be displayed, a resistance control point can be adjusted remotely, and the control value is accurate. And a resistance switch is adopted at a low end point, no numerical value is displayed, and the adjustment error of a control value is large.

And a pressure gauge 15 communicated with the liquid purifying cavity 102 is arranged outside the shell 1.

And a sealing ring 7 is arranged at the contact position of an output shaft of the speed reducer 8 and the shell 1.

The upper surface of the shell 1 is provided with an exhaust port pipe 19, and the lower surface of the shell 1 is provided with a clean exhaust port pipe 20 communicated with the inside.

The speed reducer 8 is provided with a positioning module 9 (a known product sold in the market), and the positioning module 9 is connected with a signal input end of the control box 12.

The control box 12 is a PLC control box (known in the art).

The rigid filter screen 2 comprises a protective layer, a filter layer and a filter cylinder inner framework, wherein the filter cylinder inner framework 201 is a hollow cylinder, circular hole channels 202 are uniformly distributed on the surface of the filter cylinder inner framework, the filter layer 203 is in a ring wave shape and is sleeved on the outer surface of the filter cylinder inner framework 201, an outer protective layer 204 is sleeved on the outer surface of the filter layer 203 to form a rigid framework corrugated filter cylinder, circular ring-shaped end covers 205 are welded at two ends of the filter cylinder, or a 'rigid framework corrugated filter cylinder for a backwashing filter' with the patent number of CN201920571273.X is directly adopted, the rigid framework corrugated filter cylinder for the backwashing filter comprises the protective layer, the filter layer and the filter cylinder inner framework, the filter cylinder inner framework is a hollow cylinder, circular hole channels are uniformly distributed on the surface of the filter cylinder inner framework, the filter layer is in a ring wave shape and is sleeved on the outer surface of the filter cylinder inner framework, the outer protective layer is sleeved on the outer surface of the filter layer to form the rigid framework corrugated filter cylinder, two ends of the filter cylinder are welded with circular end covers.

The floating suction nozzle 3 is a strip-shaped floating suction nozzle.

The utility model discloses when specifically using, set up the setting value of resistance measurement appearance 11 and orientation module 9's the settlement number of turns (well-known technique) on control box 12 earlier, the material gets into the muddy sap cavity 101 in casing 1 by feed inlet 17, then in entering into rigid filter section of thick bamboo 2, from inside to outside enter into casing 1's clean sap cavity 102 through rigid filter section of thick bamboo 2, the solid impurity that liquid smugglied secretly is intercepted by rigid filter section of thick bamboo 2, and form the filter cake on rigid filter section of thick bamboo 2 inner face, the clear liquid after the filtration is exported from discharge gate 18 outwards. With the extension of the filtering time, the resistance measured by the resistance measuring instrument 11 is continuously increased, the resistance measuring instrument 11 sends data to the control box 12 in real time, when the resistance is increased to a set value or the filtering time reaches a set value, the control box 12 controls equipment to carry out backwashing operation, during backwashing, the control box 12 controls to open the deslagging electromagnetic valve 13, the motor 10 and the speed reducer 8, the motor 10 drives the hollow main shaft 5 to rotate through the speed reducer 8, the hollow main shaft 5 drives the floating nozzle suction 3 to do circular motion along the inner wall of the rigid filter cylinder 2 through the intermediate communicating pipe 16, the floating nozzle suction 3 sucks filter cakes staying on the inner wall of the rigid filter cylinder 2 into the hollow main shaft 5 through the intermediate communicating pipe 16 under the action of pressure difference between the discharge hole 18 and the slag discharge hole 21, and is discharged out of the apparatus through the automatic slag discharge valve 13 from the slag discharge port 21 through the inner passage of the hollow main shaft 5. When the equipment is backwashed, the central spindle 5 rotates for 1 circle or more, the number of the backwashing circles is calculated by the positioning module 9 at the top and is compared with the set number of the circles, data is sent to the control box 12 after the set number of the circles is reached, the control box 12 controls to close the deslagging electromagnetic valve 13, the motor 10 and the speed reducer 8, backwashing is stopped, and the positioning module 9 enables the floating suction nozzle 3 to be stopped at a fixed position after each backwashing. In the whole backwashing process, the floating suction nozzle 3 is always tightly attached to the inner wall of the rigid filter cylinder 2 under the action of the spring 4, so that the defects of the existing automatic backwashing filter, such as reduced backwashing efficiency, increased ineffective consumption of backwashing media and the like caused by side leakage, are greatly eliminated. The continuous operation of the filtering function of the filter is not influenced during the backwashing process of the equipment.

The structure of the utility model is simple, the back washing time of the filter during back washing is greatly shortened, and the back washing efficiency is improved; meanwhile, the discharge amount of waste slag liquid can be greatly reduced, the production cost is effectively saved, the waste discharge amount is reduced, the service life of equipment is prolonged, energy is saved, and emission is reduced.

Firstly, a long-strip-shaped suction nozzle is used for replacing a circular suction nozzle, the motion mode of the suction nozzle is changed from spiral motion into circular motion, so that the time required by motion can be greatly reduced, and the back washing time of the utility model is only 2.5-4 seconds each time and is less than one tenth of the original technology;

secondly, the floating suction nozzle replaces the fixed suction nozzle of the prior art, the suction nozzle is enabled to move closely along the inner wall of the filter cartridge by utilizing the action of a plurality of springs, the gap between the suction nozzle and the inner wall of the filter cartridge is eliminated, the large consumption of the filter medium caused by side leakage is greatly reduced, and the floating suction nozzle has good economic and social benefits.

Claims (9)

1. An automatic backwashing filter comprises a shell, a motor and a control box, wherein the side surface of the lower part of the shell (1) is provided with uniformly distributed supporting legs (14), and the automatic backwashing filter is characterized in that the upper part of the outer side surface of the shell (1) is provided with a feed inlet pipe (17) communicated with a liquid mixing cavity (101) at the upper part in the shell (1), rigid filter screens (2) are concentrically and alternately arranged in the shell (1) at the lower part of the liquid mixing cavity (101), sealing rings are arranged between the upper end and the lower end of each rigid filter screen (2) and the shell (1), a liquid purifying cavity (102) is formed between the inner wall of the shell (1) and the outer wall of each rigid filter screen (2) as well as between the upper end sealing ring and the lower end sealing ring, and a discharge outlet pipe (18) communicated with the liquid purifying cavity (102) is arranged on the outer side surface of the shell (1);

the central position of the upper surface of the shell (1) is provided with a speed reducer (8), the input shaft of the speed reducer (8) is connected with the rotating shaft of a motor (10), the output shaft of the speed reducer (8) extends downwards into the center of the shell (1) and is connected with a hollow main shaft (5) vertically arranged in the center of the shell (1) through a coupler (6), the outer side surface of the hollow main shaft (5) arranged in the rigid filter screen (2) is provided with a plurality of through pipes (16) and a plurality of transverse guide rods which are communicated with the hollow main shaft (5), the through pipes (16) are communicated with a floating suction nozzle (3), the transverse guide rods penetrate through the floating suction nozzle (3) and are arranged on the inner wall of the rigid filter screen (2), the transverse guide rods between the floating suction nozzle (3) and the hollow main shaft (5) are sleeved with springs (4) to form a floating structure of the floating suction nozzle, the lower surface of the hollow main shaft (5) is communicated with a slag discharge opening pipe (21) through a pipeline penetrating through the lower surface of the shell (1), the outlet of the slag discharge port pipe (21) is provided with a slag discharge electromagnetic valve (13), the outer surface of the shell (1) is provided with a control box (12), and the slag discharge electromagnetic valve (13), the speed reducer (8) and the motor (10) are respectively connected with the control box (12) to form an automatic control device.

2. The automatic backwashing filter of claim 1, wherein a resistance measuring instrument (11) contacting with the outer wall of the rigid filter screen (2) is installed on the outer surface of the casing (1), and the resistance measuring instrument (11) is connected with the signal input end of the control box (12).

3. The automatic backwashing filter of claim 1, wherein a pressure gauge (15) is installed outside the casing (1) and is communicated with the clean liquid chamber (102).

4. The automatic backwashing filter of claim 1, wherein a sealing ring (7) is arranged at the contact position of the output shaft of the speed reducer (8) and the shell (1).

5. The automatic backwashing filter of claim 1, wherein an exhaust port pipe (19) is opened on the housing (1), and a drain port pipe (20) communicated with the inside is installed on the lower side of the housing (1).

6. The automatic backwashing filter of claim 1, wherein a positioning module (9) is mounted on the speed reducer (8), and the positioning module (9) is connected with a signal input end of the control box (12).

7. The automatic backwash filter as claimed in claim 1, wherein said control box (12) is a PLC control box.

8. The automatic backwashing filter of claim 1, wherein the rigid filter screen (2) comprises a protective layer, a filter layer and a filter cartridge inner frame, the filter cartridge inner frame (201) is a hollow cylinder, circular hole channels (202) are evenly distributed on the surface of the filter cartridge inner frame, the filter layer (203) is in a ring wave shape and is sleeved on the outer surface of the filter cartridge inner frame (201), an outer protective layer (204) is sleeved on the outer surface of the filter layer (203) to form a rigid frame corrugated filter cartridge, and annular end covers (205) are welded at two ends of the filter cartridge.

9. The automatic backwashing filter of claim 1, wherein said floating suction nozzle (3) is an elongated floating suction nozzle.

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