Suction pollution discharge self-cleaning filter and drip irrigation system

Abstract

The utility model relates to the technical field of filter self-cleaning, and discloses a suction pollution discharge self-cleaning filter and a drip irrigation system. The sewage suction and discharge self-cleaning filter comprises a shell, a filtering piece and a sewage suction mechanism. The shell is provided with a filtering cavity and a pollution discharge cavity; the filtering piece is arranged in the filtering cavity; the sewage suction mechanism comprises a sewage suction assembly and a centrifugal pump, the centrifugal pump is connected with the shell and suitable for vacuumizing the sewage discharge cavity, part of the sewage suction assembly is arranged in the filter cavity, the other part of the sewage suction assembly is arranged in the sewage discharge cavity, the sewage discharge cavity is communicated with the filter cavity through the sewage suction assembly, and the sewage suction assembly is suitable for cleaning the filter part. According to the suction pollution discharge self-cleaning filter, the centrifugal pump is used for sucking dirt intercepted in the filter part, so that a better suction force can still be provided under the condition of low working pressure, the filter part can be quickly cleaned, the cleaning effect is good, the self-cleaning effect of the suction pollution discharge self-cleaning filter under the low working pressure is enhanced, the self-cleaning time is shortened, and the service life of the filter is prolonged. Therefore, the filtering effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of self-cleaning of filters, and particularly relates to a suction and sewage discharge self-cleaning filter and a drip irrigation system. Background Art

[0002] Drip irrigation technology is a local irrigation method. It installs water emitters such as drippers, orifices or drip irrigation tapes on plastic pipes, and uniformly and slowly drips water with a certain pressure into the soil in the form of water droplets. This method is mainly used for the irrigation of fruit trees, vegetables, cash crops and greenhouse crops, etc., and has the advantages of water saving, fertilizer saving and precise control.

[0003] In drip irrigation projects, filters are essential core equipment in drip irrigation systems. However, with the development of drip irrigation technology, the working pressure of drip irrigation systems is getting lower and lower, resulting in that the existing filters self-cleaned by high-pressure water flow are difficult to meet the cleaning requirements, thereby affecting the drip irrigation effect. Content of the Utility Model

[0004] In view of this, the utility model provides a suction and sewage discharge self-cleaning filter and a drip irrigation system to solve the problem of poor self-cleaning ability of existing filters under low working pressure.

[0005] In the first aspect, the utility model provides a suction and sewage discharge self-cleaning filter, comprising:

[0006] A housing provided with a filtration chamber and a sewage discharge chamber;

[0007] A filter element disposed in the filtration chamber;

[0008] A sewage suction mechanism, including a sewage suction component and a centrifugal pump. The centrifugal pump is connected to the housing, and the centrifugal pump is adapted to evacuate the sewage discharge chamber. A part of the sewage suction component is disposed in the filtration chamber, and another part of the sewage suction component is disposed in the sewage discharge chamber. The sewage discharge chamber is communicated with the filtration chamber through the sewage suction component, and the sewage suction component is adapted to clean the filter element.

[0009] Beneficial effects: The suction sewage self-cleaning filter includes a housing, a filter element, and a sewage suction mechanism. The filter element is adapted to filter the fluid, so that impurities in the fluid are intercepted by the filter element to ensure the cleanliness of the fluid. The sewage suction mechanism includes a sewage suction assembly and a centrifugal pump. A negative pressure is formed by the centrifugal pump sucking the sewage discharge cavity of the housing, and then the filter element can be cleaned through the sewage suction assembly communicating the sewage discharge cavity and the filter cavity, so that the impurities intercepted by the filter element are sucked into the sewage discharge cavity through the sewage suction assembly, enabling the filter element to restore its cleaning ability and ensuring the filtering effect on the fluid. This suction sewage self-cleaning filter uses a centrifugal pump to suck the dirt intercepted by the filter element, so that a good suction force can still be provided under low working pressure, the filter element can be quickly cleaned, the cleaning effect is good, the self-cleaning effect of the suction sewage self-cleaning filter under low working pressure is enhanced, the self-cleaning time is shortened, and thus the filtering effect is ensured.

[0010] In an alternative embodiment, the sewage suction assembly includes a sewage suction pipe. The sewage suction pipe penetrates through the filter cavity and the sewage discharge cavity. The filter element is annularly arranged around the circumference of the sewage suction pipe in the filter cavity. The filter element divides the filter cavity into a first cavity and a second cavity. The second cavity is arranged around the circumference of the first cavity. The housing is further provided with a water inlet cavity. The water inlet cavity is communicated with the second cavity through the first cavity. The sewage discharge cavity is communicated with the first cavity through the sewage suction pipe. The sewage suction pipe is adapted to rotate around its own axis.

[0011] Beneficial effects: The filter element divides the filter cavity into a first cavity and a second cavity, so that only water can flow between the first cavity and the second cavity, while impurities cannot flow. The water flow carries impurities and enters the first cavity from the water inlet cavity, and then the water flow passes through the filter element and enters the second cavity, while the impurities in the water are intercepted on the surface of the filter element close to the first cavity. Moreover, the filter element is annularly arranged around the circumference of the sewage suction pipe. Then, through the suction of the centrifugal pump, the sewage suction pipe sucks the impurities intercepted on the surface of the filter element in the first cavity into the sewage discharge cavity, and the rotation of the sewage suction pipe can comprehensively clean the filter element annularly arranged around the circumference of the sewage suction pipe, ensuring the cleaning effect on the filter element.

[0012] In an alternative embodiment, the sewage suction assembly further includes a plurality of sewage suction nozzles. The plurality of sewage suction nozzles are arranged along the axis of the sewage suction pipe. A gap is provided between one end of the sewage suction nozzle close to the filter element and the filter element.

[0013] Beneficial effects: The sewage suction pipe uses the sewage suction nozzle to suck the filter element, which improves the suction effect and efficiency. A plurality of sewage suction nozzles are arranged along the axis of the sewage suction pipe. Combined with the rotation of the sewage suction pipe, it can comprehensively suck a relatively large surface of the filter element, making the cleaning effect on the filter element more comprehensive. A gap is provided between the sewage suction nozzle and the filter element, which can avoid friction between the filter element and the sewage suction nozzle, and can also prevent the outer edge of the sewage suction nozzle from scraping off the impurities intercepted on the filter element, resulting in the inability of these impurities to be sucked into the sewage discharge cavity in time through the sewage suction nozzle.

[0014] In an alternative embodiment, the gap is greater than or equal to 1 mm and less than or equal to 5 mm.

[0015] Beneficial effects: Making the gap greater than or equal to 1 mm and less than or equal to 5 mm can effectively improve the suction effect of the sewage suction nozzle on the surface of the filter element, and avoid the problem of reduced sewage suction effect caused by the sewage suction nozzle being too far away from the surface of the filter element.

[0016] In an alternative embodiment, one end of the sewage suction nozzle close to the filter element extends in a long strip shape along the axis of the sewage suction pipe.

[0017] Beneficial effects: The sewage suction nozzle being in a long strip shape can increase the area that a single sewage suction nozzle can cover the filter element, and does not affect the sewage suction pipe driving the sewage suction nozzle to rotate for sewage suction, reducing the number of sewage suction nozzles arranged, and can also form a Venturi structure to increase the suction force and ensure the cleaning force on the filter element.

[0018] In an alternative embodiment, adjacent sewage suction nozzles are arranged at intervals around the axis of the sewage suction pipe.

[0019] Beneficial effects: It can avoid the interference of the suction force caused by the close opening distance between adjacent sewage suction nozzles, which affects the cleaning effect, and ensure the cleaning effect of the sewage suction nozzle on the filter element.

[0020] In an alternative embodiment, the housing is further provided with a water inlet and a water outlet. The first chamber is communicated with the water inlet through the water inlet chamber, and the second chamber is communicated with the water outlet.

[0021] Beneficial effects: The water flow carrying impurities enters the water inlet chamber through the water inlet. The water flow entering the water inlet chamber will flow through the first chamber and the second chamber in sequence. The impurities in the water flow will be intercepted by the filter element, and the water flow without impurities will pass through the filter element and enter the second chamber and be discharged through the water outlet. The filtering process is simple and effective, ensuring the quality of the filtered water.

[0022] In an alternative embodiment, the sewage suction pipe is provided with a sewage discharge port, and one end of the sewage suction pipe provided with the sewage discharge port extends into the sewage discharge cavity.

[0023] Beneficial effects: After the impurities in the water flow are intercepted by the filter element, due to the huge negative pressure provided by the centrifugal pump, the impurities will be sucked into the sewage suction pipe through the sewage suction nozzle and discharged into the sewage chamber through the sewage discharge pipe at one end of the sewage suction pipe, completing the discharge of impurities.

[0024] In an alternative embodiment, the sewage suction mechanism further includes a driving member, the driving member is connected to the housing, and the driving member is adapted to drive the sewage suction pipe to rotate around its own axis.

[0025] Beneficial effects: The driving member drives the sewage suction pipe to rotate, so that the sewage suction pipe and the sewage suction nozzle can comprehensively clean the surface of the filter element, with fast cleaning efficiency and labor saving.

[0026] In a second aspect, the present invention further provides a drip irrigation system, including drip irrigation equipment and the above-mentioned suction and sewage self-cleaning filter, and the drip irrigation equipment is communicated with the suction and sewage self-cleaning filter.

[0027] Beneficial effects: By using the above-mentioned suction and sewage self-cleaning filter, the drip irrigation system can, on the one hand, meet the requirements for water quality under low working pressure, making the water quality output by the drip irrigation system clean and with few impurities. On the other hand, the suction and sewage self-cleaning filter breaks through the limitation of the working pressure of the drip irrigation system, enabling the drip irrigation system to be applied to lower working pressures, further enhancing the energy-saving, water-saving, and fertilizer-saving characteristics of the drip irrigation system. Description of the drawings

[0028] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a cross-sectional view of a suction and sewage self-cleaning filter according to an embodiment of the present invention;

[0030] Figure 2 It is a cross-sectional view of a housing according to an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the cooperation between a filter element and a sewage suction assembly according to an embodiment of the present invention Figure 1 ;

[0032] Figure 4 It is a schematic diagram of the cooperation between a filter element and a sewage suction assembly according to an embodiment of the present invention Figure 2 ;

[0033] Figure 5Schematic diagram of the flow directions of water flow and impurities in a suction sewage self-cleaning filter according to an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Housing; 11. Filter chamber; 111. First chamber; 112. Second chamber; 113. Water outlet; 12. Sewage chamber; 13. Water inlet chamber; 131. Water inlet; 14. Partition; 141. Annular support platform

[0036] 2. Filter element

[0037] 3. Sewage suction mechanism; 31. Sewage suction assembly; 311. Sewage suction pipe; 3111. Sewage outlet; 312. Sewage suction nozzle; 313. Annular support frame; 314. Driving member; 32. Centrifugal pump

[0038] 4. Sewage extraction pipe

[0039] 5. Control member Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] The following combines Figures 1 to 4 , and describes the embodiments of the present invention.

[0042] According to an embodiment of the present invention, on the one hand, a suction sewage self-cleaning filter is provided, which includes a housing 1, a filter element 2 and a sewage suction mechanism 3. The housing 1 is provided with a filter chamber 11 and a sewage chamber 12; the filter element 2 is disposed in the filter chamber 11; the sewage suction mechanism 3 includes a sewage suction assembly 31 and a centrifugal pump 32. The centrifugal pump 32 is connected to the housing 1, and the centrifugal pump 32 is adapted to evacuate the sewage chamber 12. A part of the sewage suction assembly 31 is disposed in the filter chamber 11, and another part of the sewage suction assembly 31 is disposed in the sewage chamber 12. The sewage chamber 12 is communicated with the filter chamber 11 through the sewage suction assembly 31, and the sewage suction assembly 31 is adapted to clean the filter element 2.

[0043] The suction and sewage self-cleaning filter provided in this embodiment includes a housing 1, a filter element 2, and a sewage suction mechanism 3. The filter element 2 is adapted to filter the fluid, intercepting impurities in the fluid on the filter element 2 to ensure the cleanliness of the fluid. The sewage suction mechanism 3 includes a sewage suction assembly 31 and a centrifugal pump 32. A negative pressure is formed by the centrifugal pump 32 sucking the sewage chamber 12 of the housing 1, and then the filter element 2 can be cleaned through the sewage suction assembly 31 connecting the sewage chamber 12 and the filter chamber 11. The impurities intercepted on the filter element 2 are sucked into the sewage chamber 12 through the sewage suction assembly 31, enabling the filter element 2 to recover its cleaning ability and ensuring the filtering effect on the fluid. This suction and sewage self-cleaning filter uses the centrifugal pump 32 to suck the dirt intercepted on the filter element 2, providing a good suction force even under low working pressures, being able to quickly clean the filter element 2 with good cleaning effect, enhancing the self-cleaning effect of the suction and sewage self-cleaning filter under low working pressures, shortening the self-cleaning time, and thus ensuring the filtering effect.

[0044] Specifically, the sewage suction assembly 31 includes a sewage suction pipe 311. The sewage suction pipe 311 passes through the filter chamber 11 and the sewage chamber 12. The filter element 2 is disposed around the circumference of the sewage suction pipe 311 in the filter chamber 11. The filter element 2 divides the filter chamber 11 into a first chamber 111 and a second chamber 112. The second chamber 112 is disposed around the circumference of the first chamber 111. The housing 1 is further provided with a water inlet chamber 13. The water inlet chamber 13 is communicated with the second chamber 112 through the first chamber 111. The sewage chamber 12 is communicated with the first chamber 111 through the sewage suction pipe 311. The sewage suction pipe 311 is adapted to rotate about its own axis. The filter element 2 divides the filter chamber 11 into a first chamber 111 and a second chamber 112, enabling only water flow between the first chamber 111 and the second chamber 112, while impurities cannot flow. The water flow with impurities enters the first chamber 111 from the water inlet chamber 13, then the water flow passes through the filter element 2 and enters the second chamber 112, and the impurities in the water are intercepted on the surface of the filter element 2 close to the first chamber 111. Moreover, the filter element 2 is disposed around the circumference of the sewage suction pipe 311. Thus, through the suction of the centrifugal pump 32, the sewage suction pipe 311 sucks the impurities intercepted on the surface of the filter element 2 in the first chamber 111 into the sewage chamber 12, and the rotation of the sewage suction pipe 311 can comprehensively clean the filter element 2 disposed around the circumference of the sewage suction pipe, ensuring the cleaning effect on the filter element.

[0045] In this embodiment, the filter element 2 is made of stainless steel. Preferably, it is formed by sandwiching a stainless steel wire mesh and a perforated plate. In other embodiments, it can also be made of other corrosion-resistant metals or plastics.

[0046] Specifically, in this embodiment, the filtering chamber 11 is cylindrical, the filtering member 2 is cylindrical, and the filtering member 2 is arranged around the sewage suction pipe 311 at intervals to form a first chamber 111 and a second chamber 112, so as to form a large filtering area within a limited volume and improve the filtering effect.

[0047] Furthermore, the sewage suction assembly 31 further includes a plurality of sewage suction nozzles 312. The plurality of sewage suction nozzles 312 are arranged along the axis of the sewage suction pipe 311, and there is a gap between the end of the sewage suction nozzle 312 close to the filtering member 2 and the filtering member 2. The sewage suction pipe 311 uses the sewage suction nozzles 312 to suck the filtering member 2, which improves the suction effect and efficiency. The plurality of sewage suction nozzles 312 are arranged along the axis of the sewage suction pipe 311. Cooperating with the rotation of the sewage suction pipe 311, the entire surface of the filtering member 2 can be comprehensively sucked, making the cleaning effect on the filtering member 2 more comprehensive. There is a gap between the sewage suction nozzle 312 and the filtering member 2, which can avoid friction between the filtering member 2 and the sewage suction nozzle 312, and can also prevent the outer edge of the sewage suction nozzle from scraping off the impurities intercepted on the filtering member 2, resulting in the inability of these impurities to be sucked into the sewage discharge chamber 12 through the sewage suction nozzle 312 in time.

[0048] In this embodiment, the sewage suction assembly 31 is provided with four sewage suction nozzles 312. In other embodiments, the number of sewage suction nozzles 312 should be set according to the cleaning efficiency requirements and the specific size of the filter.

[0049] In this embodiment, the gap is greater than or equal to 1 mm and less than or equal to 5 mm. Making the gap greater than or equal to 1 mm and less than or equal to 5 mm can effectively improve the suction effect of the sewage suction nozzle 312 on the surface of the filtering member 2 and avoid the problem of reduced sewage suction effect caused by the sewage suction nozzle 312 being too far away from the surface of the filtering member 2. In other embodiments, the gap between the sewage suction nozzle 312 and the surface of the filtering member 2 should be set according to actual cleaning requirements.

[0050] In this embodiment, the end of the sewage suction nozzle 312 close to the filtering member 2 extends along the axis of the sewage suction pipe 311 and is strip-shaped. The strip-shaped sewage suction nozzle 312 can increase the area that a single sewage suction nozzle 312 can cover the filtering member 2, and does not affect the rotation of the sewage suction pipe 311 to drive the sewage suction nozzle 312 to suck sewage, reducing the number of sewage suction nozzles 312 arranged, and can also form a Venturi structure to increase the suction force and ensure the cleaning force on the filtering member 2.

[0051] In this embodiment, the total length of the four sewage suction nozzles 312 along the axis of the sewage suction pipe 311 is slightly less than the total length of the filtering member 2 along the axis of the sewage suction pipe 311, so that the four sewage suction nozzles 312 can comprehensively clean the surface of the filtering member 2. In other embodiments, it should also be ensured that the total length of the plurality of sewage suction nozzles 312 along the axis of the sewage suction pipe 311 is slightly less than the total length of the filtering member 2 along the axis of the sewage suction pipe 311, so as to ensure the comprehensive cleaning of the surface of the filtering member 2.

[0052] Further, the adjacent dirt suction nozzles 312 are arranged at intervals around the axis of the dirt suction pipe 311. This can prevent the suction forces generated due to the close opening distance between adjacent dirt suction nozzles 312 from interfering with each other, thus affecting the cleaning effect, and ensure the cleaning effect of the dirt suction nozzles 312 on the filter element 2.

[0053] In this embodiment, the adjacent dirt suction nozzles 312 are arranged at an interval of 180° around the axis of the dirt suction pipe 311, which can minimize the interference phenomenon as much as possible. In other embodiments, the adjacent dirt suction nozzles 312 can also be arranged at an interval of 90° around the dirt suction pipe 311.

[0054] Specifically, the housing 1 is further provided with a water inlet 131 and a water outlet 113. The first chamber 111 is communicated with the water inlet 131 through the water inlet chamber 13, and the second chamber 112 is communicated with the water outlet 113. The water flow carrying impurities enters the water inlet chamber 13 through the water inlet 131. The water flow entering the water inlet chamber 13 will flow through the first chamber 111 and the second chamber 112 in sequence. The impurities in the water flow will be intercepted by the filter element 2, and the water flow without impurities will pass through the filter element 2 and enter the second chamber 112 and be discharged through the water outlet 113. The filtering process is simple and effective, ensuring the quality of the filtered water.

[0055] Specifically, the housing 1 is in a pipe shape. The water inlet 131 is arranged at one end of the housing 1. Two partitions 14 with through holes are arranged at intervals along the axis of the housing 1 inside the housing 1, so that the water inlet chamber 13, the filtering chamber 11, and the sewage discharge chamber 12 are sequentially formed along the axis of the housing 1 through the water inlet 131 inside the housing 1.

[0056] Further, the dirt suction assembly 31 further includes an annular support frame 313. The annular support frame 313 is arranged at one end of the filter element 2 and is arranged in the through hole of the partition 14 separating the water inlet chamber 13 and the filtering chamber 11. An annular support platform 141 is arranged in the other partition 14. The other end of the filter element 2 is placed on the annular support platform 141, making the installation of the filter element 2 stable. One end of the dirt suction pipe 311 passes through the annular support frame 313, and the other end of the dirt suction pipe 311 passes through the through port of the partition 14 separating the filtering chamber 11 and the sewage discharge chamber 12 and extends into the sewage discharge chamber 12.

[0057] Specifically, the dirt suction pipe 311 is provided with a sewage discharge port 3111. The end of the dirt suction pipe 311 provided with the sewage discharge port 3111 extends into the sewage discharge chamber 12. After the impurities in the water flow are intercepted by the filter element 2, due to the huge negative pressure provided by the centrifugal pump 32, the impurities will be sucked into the dirt suction pipe 311 through the dirt suction nozzles 312 and discharged into the sewage discharge chamber 12 through the sewage discharge pipe at one end of the dirt suction pipe 311, completing the discharge of the impurities.

[0058] It should be noted that the annular support frame 313 allows the water flow in the water inlet chamber 13 to pass through, increasing the rate of water flow into the filtration chamber 11 and accelerating the filtration efficiency. After the through-hole of the partition plate 14 separating the filtration chamber 11 and the sewage discharge chamber 12 is matched with the sewage suction pipe 311, the water flow cannot pass through. The water flow and impurities can only be sucked into the sewage suction pipe 311 through the sewage suction nozzle 312 and discharged into the sewage discharge chamber 12 through the sewage discharge port 3111, avoiding waste of water resources.

[0059] Specifically, the suction sewage self-cleaning filter is further provided with a sewage suction pipe 4. One end of the sewage suction pipe 4 is connected to the inlet end of the centrifugal pump 32, and the other end of the sewage suction pipe 4 is connected to the outlet of the sewage discharge chamber 12. The impurities in the sewage discharge chamber 12 will be sucked into the sewage suction pipe 4 by the huge suction force of the centrifugal pump 32 and discharged from the outlet end of the centrifugal pump 32 after passing through the centrifugal pump 32.

[0060] Furthermore, the sewage suction assembly 31 further includes a driving member 314. The driving member 314 is connected to the housing 1, and the driving member 314 is adapted to drive the sewage suction pipe 311 to rotate around its own axis. The driving member 314 drives the sewage suction pipe 311 to rotate, so that the sewage suction pipe 311 and the sewage suction nozzle 312 can comprehensively clean the surface of the filter element 2, with fast cleaning efficiency and labor saving.

[0061] In this embodiment, the driving member 314 is a motor reducer. In other embodiments, the driving member 314 can also be a servo motor. The driving member 314 is connected to the sewage suction pipe through a reducer.

[0062] Furthermore, the suction sewage self-cleaning filter further includes a control member 5. The control member 5 is arranged at the outlet end of the centrifugal pump 32 and can control the flow rate and pressure of the sewage discharged by the centrifugal pump 32. In this embodiment, the control member 5 is an electric ball valve, with strong control effect. In other embodiments, it can also be other types of valves that can cut off or connect.

[0063] According to an embodiment of the present invention, on the other hand, a drip irrigation system is further provided, including drip irrigation equipment and the above-mentioned suction sewage self-cleaning filter, and the drip irrigation equipment is communicated with the suction sewage self-cleaning filter.

[0064] The drip irrigation system provided in this embodiment can, on the one hand, meet the requirements for water quality under low working pressure, making the water quality output by the drip irrigation system clean and with less impurities. On the other hand, the suction sewage self-cleaning filter breaks the limitation on the working pressure of the drip irrigation system, enabling the drip irrigation system to be applied to lower working pressures, further enhancing the energy-saving, water-saving, and fertilizer-saving characteristics of the drip irrigation system.

[0065] The following combines Figure 5 to illustrate the basic working process of the suction sewage self-cleaning filter provided in this embodiment:

[0066] When the suction sewage self-cleaning filter filters the water source, water flows into the water inlet cavity 13 from the water inlet 131, and enters the first cavity 111 through the support frame. As the water continues to flow through the filter element 2 into the second cavity 112, the impurities in the water will be intercepted by the filter screen on the surface of the filter screen close to the first cavity 111. The filtered clean water flowing into the second cavity 112 will be discharged through the water outlet 113 and enter the drip irrigation equipment for drip irrigation operations.

[0067] After a long time of filtration, the impurities in the water will accumulate on the surface of the filter element 2, resulting in a poor filtration effect, and the rate of water flowing through the filter element 2 will slow down. At this time, the control member 5, the centrifugal pump 32, and the driving member 314 need to be opened. The centrifugal pump 32 sucks the sewage cavity 12 to form a strong negative pressure. The strong negative pressure is transmitted to the sewage suction nozzle 312 along the sewage outlet 3111 of the sewage suction pipe 311, so that the sewage suction nozzle 312 close to the surface of the filter element 2 can suck the impurities on the surface of the filter element 2 into the sewage suction pipe 311 and discharge them into the sewage cavity 12. Moreover, the driving member 314 drives the sewage suction nozzle 312 to rotate around its own axis and drives the suction nozzle to rotate, thereby comprehensively cleaning the entire inner surface of the filter element 2, and the cleaning effect is excellent. The impurities entering the sewage cavity 12 will be sucked out of the system by the centrifugal pump 32. After the self-cleaning of the suction sewage self-cleaning filter is completed, the suction sewage self-cleaning filter resumes its filtering ability, and the clean water can continue to enter the drip irrigation equipment for drip irrigation.

[0068] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. Suction and drainage self-cleaning filter, characterized in that: include: The housing (1) is provided with a filter chamber (11) and a sewage discharge chamber (12); A filter element (2) is arranged in the filter cavity (11); The dirt suction mechanism (3) comprises a dirt suction component (31) and a centrifugal pump (32), wherein the centrifugal pump (32) is connected to the housing (1), and the centrifugal pump (32) is suitable for evacuating the dirt discharge chamber (12). A portion of the dirt suction component (31) is arranged in the filter chamber (11), and another portion of the dirt suction component (31) is arranged in the dirt discharge chamber (12). The dirt discharge chamber (12) and the filter chamber (11) are connected via the dirt suction component (31), and the dirt suction component (31) is suitable for cleaning the filter element (2).

2. The suction and sewage self-cleaning filter according to claim 1, characterized in that: The sewage suction component (31) comprises a sewage suction pipe (311), the sewage suction pipe (311) is arranged through the filter chamber (11) and the sewage discharge chamber (12), the filter element (2) is arranged in the filter chamber (11) around the sewage suction pipe (311), the filter element (2) divides the filter chamber (11) into a first chamber (111) and a second chamber (112), the second chamber is arranged around the first chamber (111), the housing (1) is further provided with a water inlet chamber (13), the water inlet chamber and the second chamber (112) are connected through the first chamber (111), the sewage discharge chamber (12) and the first chamber (111) are connected through the sewage suction pipe (311), and the sewage suction pipe is suitable for rotating around its own axis.

3. The sewage suction and discharge self-cleaning filter according to claim 2, characterized in that: The sewage suction assembly (31) further comprises a plurality of sewage suction nozzles (312), wherein the plurality of sewage suction nozzles (312) are arranged along the axis of the sewage suction pipe (311), and a gap is arranged between one end of the sewage suction nozzle (312) close to the filter element (2) and the filter element (2).

4. The sewage suction and discharge self-cleaning filter according to claim 3, characterized in that: The gap is greater than or equal to 1 mm and less than or equal to 5 mm.

5. The sewage suction and discharge self-cleaning filter according to claim 3, characterized in that: One end of the sewage suction nozzle (312) close to the filter element (2) extends along the axis of the sewage suction pipe (311) in the shape of a long strip.

6. The sewage suction and discharge self-cleaning filter according to claim 3, characterized in that: Adjacent sewage suction nozzles (312) are arranged at intervals around the axis of the sewage suction pipe (311).

7. The sewage suction and discharge self-cleaning filter according to claim 2, characterized in that: The housing (1) is further provided with a water inlet (131) and a water outlet (113); the first chamber (111) is in communication with the water inlet (131) via the water inlet chamber (13); and the second chamber (112) is in communication with the water outlet (113).

8. The sewage suction and discharge self-cleaning filter according to claim 2, characterized in that: The sewage suction pipe (311) is provided with a sewage discharge port (3111), and one end of the sewage suction pipe (311) provided with the sewage discharge port (3111) extends into the sewage discharge chamber (12).

9. The sewage suction and discharge self-cleaning filter according to claim 2, characterized in that: The sewage suction mechanism (3) further comprises a driving member (314), wherein the driving member (314) is connected to the housing (1), and the driving member (314) is suitable for driving the sewage suction pipe (311) to rotate around its own axis.

10. A drip irrigation system, comprising a drip irrigation device and a suction and sewage self-cleaning filter according to any one of claims 1 to 9, characterized in that: The drip irrigation equipment is communicated with the suction and sewage self-cleaning filter.

Images