Automatic water filter

Abstract

The utility model discloses an automatic water filter, which relates to the technical field of filtering equipment and comprises a shell, an electric cabinet and a power component, the electric cabinet and the power component are mounted on the outer side of the shell, and the power component is mounted at the top of the shell; the water inlet assembly is mounted on one side of the outer side of the shell; the bracket is mounted at the bottom of the shell; the pollution discharge assembly is mounted in the middle of the bottom of the shell; the water outlet assembly is mounted at the top of the outer side of the shell; the filtering assembly is mounted at the top of the inner cavity of the shell; the backwashing assembly is mounted at the bottom of the inner cavity of the shell; according to the automatic water filter, by setting the backwashing time and identifying the position of the backwashing water baffle, when the backwashing water baffle reaches the bottom of a certain filter cylinder, the stepping motor speed reducer stops rotating, the backwashing water baffle stays at the bottom of the filter cylinder for a certain time, and after the backwashing water baffle stays at the bottom of the filter cylinder for a period of time, the stepping motor speed reducer stops rotating. The stepping motor speed reducer drives the backwashing water baffle to run to the next filter cartridge for cleaning for a certain time, and the operation is repeated, so that the invalid working stroke of the backwashing water baffle is reduced within the same time, and the backwashing efficiency and the filter cartridge impurity cleaning effect are greatly improved.

Description

Technical Field

[0001] The utility model relates to filtering equipment technology, in particular to an automatic water filter. Background Art

[0002] The water supply of the hydropower station industry is taken from different sources such as rivers, lakes, etc., so there are various impurities in the water, such as silt, floating grass, fish, shrimp, snails, etc. Before the impurities enter the pipes of the water supply system, they are filtered by simple fences, and disposable filters are used for filtering under better conditions. However, there are still some small impurities in the treated water. For example: small particles of suspended matter, snails, etc. When they accumulate to a certain extent in the water supply system and are not removed, the flow area of ​​the filter will be reduced, and eventually blockage will occur, which will cause production and shutdown in severe cases; it poses a great threat to the safe operation of the equipment, so it is necessary to set secondary filters on large-diameter pipes and industrial water filters on small-diameter pipes.

[0003] When the existing automatic water filter is in use, the backwash baffle is constantly rotating driven by a traditional motor, but the backwash effect is only achieved when the baffle completely blocks a filter cartridge. The backwash effect of the backwash baffle is very weak in other rotation strokes, and even there is no backwash effect in some rotation strokes. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic water filter to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the utility model provides the following technical solution: an automatic water filter, comprising a housing and an electric control box installed outside the housing, and also comprising:

[0006] A power assembly is mounted on the top of the housing;

[0007] A water inlet assembly, which is installed on one side of the outer side of the shell;

[0008] A bracket mounted on the bottom of the housing;

[0009] A sewage discharge assembly is installed in the middle of the bottom of the shell;

[0010] A water outlet assembly is installed on the top of the outer side of the shell;

[0011] A filter assembly is installed on the top of the inner cavity of the shell;

[0012] The backwashing assembly is installed at the bottom of the inner cavity of the shell.

[0013] Furthermore, the housing comprises:

[0014] An upper shell is installed on the top of the shell, and a through hole is opened in the middle of the upper shell;

[0015] The middle shell is fixedly mounted on the bottom of the upper shell, and a lower fixing plate is fixedly mounted at one third of the inner wall of the middle shell in the vertical direction, a plurality of through holes are opened in a circular array on the outer side of the top of the lower fixing plate, and a through hole is opened in the middle of the top of the lower fixing plate;

[0016] The lower shell is fixedly installed on the bottom of the middle shell, and a through hole is opened in the middle thereof, and the bottom of the lower shell is fixedly connected to the top of the bracket.

[0017] Furthermore, the filter assembly comprises:

[0018] A plurality of fixed units are movably mounted on the top of the upper shell in a circular array;

[0019] A plurality of filter cartridges are movably mounted on the bottom of the upper shell in a circumferential array, and the outer bottoms of a plurality of filter cartridges are movably mounted on the inner sides of the through holes formed in the lower fixing plate.

[0020] Furthermore, the power assembly comprises:

[0021] A connecting piece, which is fixedly installed in the middle of the top of the upper shell, and the inner diameter of the connecting piece is larger than the diameter of the through hole opened in the upper shell;

[0022] The stepper motor reducer is fixedly installed on the top of the connecting piece;

[0023] A drive shaft, one end of which is fixedly connected to the output end of the stepper motor reducer through a coupling, and the other end of the drive shaft passes through the through hole in the middle of the lower fixed plate and extends to the top of the lower shell, and the other end of the drive shaft is rotatably connected to the lower shell, and a through hole is opened at the bottom of the drive shaft, and the through hole passes through one side of the drive shaft located at the bottom of the lower fixed plate.

[0024] Furthermore, the water inlet assembly comprises:

[0025] A water inlet pipe is fixedly installed on the outside of the middle shell, and one end of the water inlet pipe is connected to the inner cavity of the shell, and the connection is located below the lower fixing plate;

[0026] The water inlet control unit is fixedly installed on one side of the water inlet pipe.

[0027] Furthermore, the water outlet assembly comprises:

[0028] A water outlet pipe is fixedly installed on the outside of the middle shell, and one end of the water outlet pipe is connected to the inner cavity of the shell, and the connection point is located above the lower fixed plate;

[0029] The water outlet control component is fixedly installed on one side of the water outlet pipe.

[0030] Furthermore, the backwash component comprises:

[0031] A backwash water baffle plate, one side of which is connected with a guide member for limiting its rotation around the axis of the drive shaft, the guide member is capable of limiting the top side of the backwash water baffle plate and surrounding the bottom through hole of the lower fixed plate, the outer side of the drive shaft is fixedly connected to the backwash water baffle plate, and one end of the through hole of the backwash water baffle plate is connected to one end of the through hole opened at the bottom of the drive shaft;

[0032] The backwash control housing is installed at the bottom of the lower housing.

[0033] Furthermore, the backwash control housing comprises:

[0034] A sewage discharge housing, the top outer side of which is fixedly mounted on the inner wall of the through hole opened in the lower housing, and the inner cavity of the sewage discharge housing is connected to the other end of the through hole opened in the bottom of the driving shaft;

[0035] The control component is fixedly installed at the bottom of the inner cavity of the sewage discharge housing.

[0036] Furthermore, the sewage discharge assembly comprises:

[0037] A sewage pipe is fixedly installed on one side of the sewage housing, and the sewage pipe is connected to the inner cavity of the sewage housing;

[0038] The sewage control component is fixedly installed on one side of the sewage pipe.

[0039] Compared with the prior art, the automatic water filter provided by the utility model sets the backwash time and identifies the position of the backwash water baffle plate. When the backwash water baffle plate reaches the bottom of a filter cartridge, the stepper motor reducer stops rotating and keeps the backwash water baffle plate at the bottom of the filter cartridge for a certain period of time. After the filter cartridge stays for a period of time, the stepper motor reducer drives the backwash water baffle plate to run to the next filter cartridge for cleaning for a certain period of time. This is repeated, thereby reducing the ineffective working stroke of the backwash water baffle plate within the same period of time and greatly improving the backwash efficiency and the filter cartridge impurity cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0041] Figure 1 A first schematic diagram of the overall structure provided for an embodiment of the utility model;

[0042] Figure 2 A second schematic diagram of the overall structure provided by an embodiment of the utility model;

[0043] Figure 3A third schematic diagram of the overall structure provided by an embodiment of the utility model;

[0044] Figure 4 A partial structural cross-sectional view provided for an embodiment of the utility model;

[0045] Figure 5 The embodiment of the utility model provides Figure 4 A magnified view of middle;

[0046] Figure 6 The fourth schematic diagram of the overall structure provided for an embodiment of the utility model.

[0047] Description of reference numerals:

[0048] 1. Electric control box; 2. Shell; 3. Power assembly; 4. Water inlet assembly; 5. Bracket; 6. Sewage discharge assembly; 7. Water outlet assembly; 8. Filter assembly; 9. Backwash assembly; 21. Middle shell; 22. Upper shell; 23. Lower shell; 211. Lower fixed plate; 31. Stepper motor reducer; 32. Connector; 33. Drive shaft; 41. Water inlet control unit; 42. Water inlet pipe; 61. Sewage discharge control assembly; 62. Sewage discharge pipe; 71. Water outlet control assembly; 72. Water outlet pipe; 81. Fixed unit; 82. Filter cartridge; 91. Backwash water retaining plate; 92. Backwash control shell; 921. Sewage discharge shell; 922. Control assembly. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0050] Embodiment 1:

[0051] See also Figure 1 - Figure 6 The automatic water filter comprises a housing 2 and an electric control box 1 installed outside the housing 2, and further comprises:

[0052] A power assembly 3, which is installed on the top of the housing 2;

[0053] A water inlet assembly 4, which is installed on one side of the outer side of the housing 2;

[0054] A bracket 5, which is installed at the bottom of the housing 2;

[0055] A sewage discharge assembly 6, which is installed in the middle of the bottom of the shell 2;

[0056] A water outlet assembly 7, which is installed on the top of the outer side of the housing 2;

[0057] A filter assembly 8 is installed at the top of the inner cavity of the housing 2;

[0058] The backwashing assembly 9 is installed at the bottom of the inner cavity of the shell 2.

[0059] The specific implementation is as follows: the electric control box 1 can control the electrical components of the device separately.

[0060] The housing 2 includes:

[0061] An upper shell 22 is mounted on the top of the shell 2, and a through hole is formed in the middle of the upper shell 22;

[0062] The middle shell 21 is fixedly mounted on the bottom of the upper shell 22, and a lower fixing plate 211 is fixedly mounted at one third of the inner wall of the middle shell 21 in the vertical direction, and a plurality of through holes are opened in a circular array on the outer side of the top of the lower fixing plate 211, and a through hole is opened in the middle of the top of the lower fixing plate 211;

[0063] The lower shell 23 is fixedly mounted on the bottom of the middle shell 21 , and a through hole is opened in the middle thereof, and the bottom of the lower shell 23 is fixedly connected to the top of the bracket 5 .

[0064] The specific implementation is as follows: the lower fixing plate 211 divides the middle shell 21 into two parts, the inner volume of the middle shell 21 at the top of the lower fixing plate 211 is larger than the volume of the middle shell 21 at the bottom of the lower fixing plate 211, and all parts in direct contact with water are made of materials including but not limited to stainless steel 304.

[0065] The filter assembly 8 comprises:

[0066] A plurality of fixing units 81 are movably mounted on the top of the upper housing 22 in a circular array;

[0067] A plurality of filter cartridges 82 are movably mounted on the bottom of the upper shell 22 in a circular array, and the outer bottoms of the plurality of filter cartridges 82 are movably mounted on the inner sides of the through holes formed in the lower fixing plate 211 .

[0068] The specific implementation is as follows: the filter assembly 8 is assembled in the cylinder to ensure that the inner volume of the shell 2 has the largest filtering area. The filter cartridge 82 is cylindrical in shape and is a wedge-shaped stainless steel filter cartridge. The filter cartridge 82 divides the shell 2 into a clean water chamber and a turbid water chamber. The turbid water chamber is in communication with the inner surface of the filter cartridge 82 (the large seam side of the wedge-shaped filter element), and the clean water chamber is in communication with the outer surface of the filter cartridge 82 (the large seam side of the wedge-shaped filter element). This ensures that the backwashing has the best flushing effect. Pressure sensors (not shown in the figure) are installed in the clean water chamber and the turbid water chamber respectively. As shown, as the filtration proceeds, the impurities trapped on the surface of the filter cartridge 82 increase, and the pressure difference between the water inlet pipe 42 and the water outlet pipe 72 increases. The pressure sensor is used to measure the pressure difference between the inside and outside of the filter cartridge 82. The PLC programming program determines the degree of blockage of the filter cartridge 82. Compared with the traditional differential pressure switch, the accuracy and speed of judging the blockage of the filter cartridge 82 are improved, and the blockage of the filter cartridge 82 is monitored in real time. The top of the filter cartridge 82 fits tightly with the upper shell 22, and the bottom of the filter cartridge 82 fits tightly with the through holes opened in a circular array on the lower fixed plate 211.

[0069] The power assembly 3 includes:

[0070] A connecting member 32 is fixedly mounted at the middle of the top of the upper shell 22, and the inner diameter of the connecting member 32 is larger than the diameter of the through hole provided in the upper shell 22;

[0071] A stepper motor reducer 31 is fixedly mounted on the top of the connecting member 32;

[0072] The drive shaft 33 has one end fixedly connected to the output end of the stepper motor reducer 31 through a coupling; and the other end of the drive shaft 33 passes through the through hole in the middle of the lower fixed plate 211 and extends to the top of the lower shell 23, and the other end of the drive shaft 33 is rotatably connected to the lower shell 23; a through hole is opened at the bottom of the drive shaft 33, and the through hole passes through one side of the drive shaft 33 located at the bottom of the lower fixed plate 211.

[0073] The specific implementation is as follows: the stepper motor reducer 31 is electrically connected to the outside and is controlled by an external PLC programming program.

[0074] The water inlet assembly 4 comprises:

[0075] A water inlet pipe 42 is fixedly installed on the outside of the middle shell 21, and one end of the water inlet pipe 42 is connected to the inner cavity of the shell 2, and the connection is located below the lower fixing plate 211;

[0076] The water inlet control unit 41 is fixedly installed on one side of the water inlet pipe 42 .

[0077] The specific implementation is as follows: the water inlet control unit 41 can separate the inner wall of the water inlet pipe 42 into two independent spaces, and the water inlet control unit 41 is controlled by an external PLC programming program.

[0078] The water outlet assembly 7 comprises:

[0079] The water outlet pipe 72 is fixedly installed on the outside of the middle shell 21, and one end of the water outlet pipe 72 is connected to the inner cavity of the shell 2, and the connection point is located above the lower fixed plate 211;

[0080] The water outlet control assembly 71 is fixedly installed on one side of the water outlet pipe 72 .

[0081] The specific implementation is as follows: the water outlet control component 71 can separate the inner wall of the water outlet pipe 72 into two independent spaces, and the water outlet control component 71 is controlled by an external PLC programming program.

[0082] The backwash assembly 9 comprises:

[0083] The backwash water baffle 91 has a guide member connected to one side thereof to limit its rotation around the axis of the drive shaft 33. The guide member is capable of limiting the top side of the backwash water baffle 91 and surrounds the bottom through hole of the lower fixed plate 211. The outer side of the drive shaft 33 is fixedly connected to the backwash water baffle 91. One end of the through hole of the backwash water baffle 91 is connected to one end of the through hole opened at the bottom of the drive shaft 33.

[0084] The backwash control housing 92 is installed at the bottom of the lower housing 23 .

[0085] The specific implementation is as follows: the backwash water baffle 91 adopts a sealing ring with a polymer anti-wear plate inside. Under the action of a stainless steel spring, the sealing ring is tightly attached to the bottom of the lower fixed plate 211 below the filter cartridge 82. Compared with the traditional fixed baffle, it improves wear resistance, increases the sealing effect, improves the backwash efficiency, increases the service life of the backwash water baffle 91 and enhances the filtering effect of the backwash water baffle 91.

[0086] The backwash control housing 92 includes:

[0087] The top outer side of the sewage discharge housing 921 is fixedly mounted on the inner wall of the through hole opened in the lower housing 23, and the inner cavity of the sewage discharge housing 921 is connected to the other end of the through hole opened at the bottom of the driving shaft 33;

[0088] The control assembly 922 is fixedly mounted on the bottom of the inner cavity of the sewage discharge housing 921 .

[0089] The specific implementation method is as follows: During the application of the automatic water filter in the hydropower station, the pressure in the shell 2 will be lost during backwashing. Generally, filters use a throttle plate to reduce the pressure loss at the sewage outlet. However, due to excessive impurities in the sewage, the impurity volume is too large, and the throttle hole is too small, the throttle hole is blocked and the pressure loss of the throttle hole increases. Compared with the traditional throttling method, a sewage pressure regulating valve control component 922 is set at the sewage outlet at the bottom of the shell 2. The control component 922 adjusts the sewage pressure loss steplessly according to the sewage discharge demand. The sewage pressure regulating valve is a spring-opened hole and will not be blocked. Compared with the throttle orifice plate, it has the advantages of high adjustment accuracy, convenient adjustment, and high reliability.

[0090] The sewage discharge assembly 6 comprises:

[0091] A sewage pipe 62 is fixedly installed on one side of the sewage housing 921, and the sewage pipe 62 is connected to the inner cavity of the sewage housing 921;

[0092] The sewage control assembly 61 is fixedly installed on one side of the sewage pipe 62 .

[0093] The specific implementation is as follows: the sewage control component 61 connected to the sewage pipe outlet 62 includes a sewage valve, which includes but is not limited to an electric ball valve. The electric ball valve is suitable for liquid environments with high residue concentration and large residue volume. The electric ball valve will not be stuck due to torque overload and will not cause sewage leakage due to poor closure. At the same time, the electric ball valve is more reliable and has a longer service life. The sewage control component 61 is controlled by an external PLC programming program, and the sewage control component 61 is electrically connected to the outside.

[0094] Working principle: When in use, when the automatic water filter is in the normal filtering state, the stepper motor reducer 31 does not start, the control component 922 blocks the middle through hole of the lower shell 23, and the sewage component 6 does not work. When the filter cartridge 82 reaches the cleaning state, the sewage control component 61 drives the sewage pipe 62 to open, and the stepper motor reducer 31 starts, driving the backwashing baffle 91 to rotate. When the top opening of the backwashing baffle 91 rotates to the bottom of a filter cartridge 82, the stepper motor reducer 31 stops, and the inlet of the washed filter cartridge 82 is connected to the sewage pipe 62. The dirt attached to the filter cartridge 82 is backwashed with the clean water after filtering inside the water filter and discharged through the opened sewage pipe 62. The self-cleaning of the automatic water filter is set by the PLC programming program in the electric control box 1, including four control modes: timed cleaning, differential pressure control cleaning, logic program control cleaning, and manual control cleaning:

[0095] Timed cleaning: The timed cleaning PLC programmable controller can set the action time to 1-99 hours, and the flushing time setting range is adjustable from 1 to 60 minutes. When the PLC programmable controller is activated, the sewage discharge component 6 controls the control component 922 and the sewage discharge pipe 62 to open, the stepper motor reducer 31 is started, and the water filter is cleaned and discharged.

[0096] Differential pressure control for cleaning: When the pressure difference between the clean water chamber and the turbid water chamber of the water filter reaches the set value of the electric control box 1, the PLC automatically controls the sewage discharge component 6 to control the control component 922 and the sewage discharge pipe 62 to open, the stepper motor reducer 31 starts, and the water filter cleans and discharges sewage.

[0097] The two control modes of timed cleaning and differential pressure controlled cleaning are operated in parallel.

[0098] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automatic water filter, comprising a housing (2) and an electric control box (1) mounted outside the housing (2), characterized in that: Also includes: A power assembly (3) mounted on the top of the housing (2); A water inlet assembly (4), which is installed on one side of the outer side of the shell (2); A bracket (5) mounted on the bottom of the housing (2); A sewage discharge assembly (6) installed in the middle of the bottom of the housing (2); A water outlet assembly (7) mounted on the top of the outer side of the housing (2); A filter assembly (8) mounted on the top of the inner cavity of the housing (2); A backwashing assembly (9) is installed at the bottom of the inner cavity of the shell (2).

2. The automatic water filter according to claim 1, characterized in that: The housing (2) comprises: An upper shell (22) is mounted on the top of the shell (2), and a through hole is formed in the middle of the upper shell (22); The middle shell (21) is fixedly mounted on the bottom of the upper shell (22), and a lower fixing plate (211) is fixedly mounted at one third of the inner wall of the middle shell (21) in the vertical direction, a plurality of through holes are formed in a circular array on the outer side of the top of the lower fixing plate (211), and a through hole is formed in the middle of the top of the lower fixing plate (211); The lower shell (23) is fixedly mounted on the bottom of the middle shell (21), and a through hole is opened in the middle thereof, and the bottom of the lower shell (23) is fixedly connected to the top of the bracket (5).

3. The automatic water filter according to claim 1, characterized in that: The filter assembly (8) comprises: A plurality of fixing units (81) are movably mounted on the top of the upper shell (22) in a circular array; A plurality of filter cartridges (82) are movably mounted on the bottom of the upper shell (22) in a circular array, and the outer bottoms of the plurality of filter cartridges (82) are movably mounted on the inner sides of through holes formed in the lower fixing plate (211).

4. The automatic water filter according to claim 1, characterized in that: The power assembly (3) comprises: A connecting piece (32) is fixedly mounted on the middle of the top of the upper shell (22), and the inner diameter of the connecting piece (32) is larger than the diameter of the through hole opened in the upper shell (22); A stepper motor reducer (31), which is fixedly mounted on the top of the connecting member (32); A drive shaft (33) has one end fixedly connected to the output end of the stepper motor reducer (31) through a coupling, and the other end of the drive shaft (33) passes through a through hole in the middle of the lower fixed plate (211) and extends to the top of the lower shell (23), and the other end of the drive shaft (33) is rotatably connected to the lower shell (23), and a through hole is opened at the bottom of the drive shaft (33), and the through hole passes through one side of the drive shaft (33) located at the bottom of the lower fixed plate (211).

5. The automatic water filter according to claim 1, characterized in that: The water inlet assembly (4) comprises: A water inlet pipe (42) is fixedly mounted on the outside of the middle shell (21), and one end of the water inlet pipe (42) is connected to the inner cavity of the shell (2), and the connection point is located below the lower fixing plate (211); The water inlet control unit (41) is fixedly installed on one side of the water inlet pipe (42).

6. The automatic water filter according to claim 1, characterized in that: The water outlet assembly (7) comprises: A water outlet pipe (72) is fixedly mounted on the outside of the middle shell (21), and one end of the water outlet pipe (72) is connected to the inner cavity of the shell (2), and the connection point is located above the lower fixed plate (211); The water outlet control assembly (71) is fixedly installed on one side of the water outlet pipe (72).

7. The automatic water filter according to claim 1, characterized in that: The backwashing assembly (9) comprises: A backwashing water baffle (91) is connected to one side of which a guide member is provided to limit the rotation of the backwashing water baffle (91) around the axis of the drive shaft (33); the guide member is capable of limiting the top side of the backwashing water baffle (91) and surrounding the bottom through hole of the lower fixed plate (211); the outer side of the drive shaft (33) is fixedly connected to the backwashing water baffle (91); one end of the through hole of the backwashing water baffle (91) is connected to one end of the through hole opened at the bottom of the drive shaft (33); The backwash control housing (92) is installed at the bottom of the lower housing (23).

8. The automatic water filter according to claim 7, characterized in that: The backwash control housing (92) comprises: A sewage discharge housing (921) has its top outer side fixedly mounted on the inner wall of a through hole opened in the lower housing (23), and the inner cavity of the sewage discharge housing (921) is connected to the other end of the through hole opened in the bottom of the driving shaft (33); The control assembly (922) is fixedly mounted on the bottom of the inner cavity of the sewage discharge housing (921).

9. The automatic water filter according to claim 1, characterized in that: The sewage discharge assembly (6) comprises: A sewage discharge pipe (62) is fixedly mounted on one side of the sewage discharge housing (921), and the sewage discharge pipe (62) is in communication with the inner cavity of the sewage discharge housing (921); The sewage control assembly (61) is fixedly installed on one side of the sewage pipe (62).

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