Self-cleaning filter

Abstract

The embodiment of the utility model discloses a self-cleaning filter, and belongs to the technical field of filters, the self-cleaning filter is provided with a barrel, the barrel is provided with a drain outlet, a filter assembly is arranged, a filter part in the filter assembly surrounds a first pipe body, one end of a suction nozzle is communicated with the first pipe body, and the other end of the suction nozzle faces the filter part; the first pipe body is inserted into the drain outlet, the first valve body is arranged on the inner side of the first pipe body, the filtering piece filters liquid entering the cavity of the barrel, when the pressure difference between the liquid outlet and the liquid inlet reaches a preset value, the first valve body is opened, and the first pipe body is communicated with the drain outlet; liquid in the cavity enters the suction nozzle through the filter to wash the filter, and the liquid entering the suction nozzle is discharged out of the barrel through the first pipe body and the drain outlet, so that the liquid is discharged to the outer side of the barrel through the drain outlet, the cleaning effect and cleaning efficiency of the filter are guaranteed, damage to the filter is reduced, the service life of the filter is prolonged, and the service life of the filter is prolonged. And the service life of the filter is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of filters, and in particular to a self-cleaning filter. Background Art

[0002] To ensure the continuity of operation of ships and other marine vehicles, the fuel used by the vehicles needs to be filtered to remove impurities in the fuel to ensure the performance of the fuel. As the filtering continues, more impurities will accumulate inside the filter, affecting the filtering effect of the filter. Therefore, the filter needs to have self-cleaning capabilities. However, existing filters are prone to wear and tear on the filter element during the self-cleaning process, affecting the service life of the filter element, resulting in a shortened filter element replacement cycle, and affecting the self-sustaining power and endurance of ships and other marine vehicles. Utility Model Content

[0003] The embodiment of the present application provides a self-cleaning filter, which can solve the problem that the filter element is easily worn during the self-cleaning process of the existing filter, thereby affecting the service life of the filter element.

[0004] 14. The filter assembly of claim 13, wherein the filter assembly comprises a first tube body, a filter element, a suction nozzle, and a first valve body, wherein the filter element surrounds the first tube body in a circumferential direction of the first tube body, one end of the suction nozzle is connected to the first tube body and communicates with the inner side of the first tube body, and the other end faces the filter element, one end of the first tube body along the axial direction is inserted into the drain outlet, and the first valve body is arranged on the inner side of the first tube body adjacent to the drain outlet; the filter element filters the liquid entering the cavity; when the pressure difference between the liquid outlet and the liquid inlet reaches a preset value, the first valve body is opened, the first tube body is communicated with the drain outlet, the liquid in the cavity enters the suction nozzle through the filter element to flush the filter element, and the liquid entering the suction nozzle is discharged from the cylinder through the first tube body and the drain outlet.

[0005] Optionally, the filter element includes a filter column, which surrounds the first tube body in the circumferential direction of the first tube body, and a filter element is provided inside the filter column. The end of the suction nozzle facing away from the first tube body is toward the filter column; the pressure difference between the liquid outlet and the liquid inlet reaches a preset value, the first valve body opens, and the liquid in the cavity enters the suction nozzle through the filter column, thereby flushing the filter element in the filter column.

[0006] Optionally, the self-cleaning filter also includes a driving member, which is arranged on the outside of the cylinder and is connected to the first tube body; a plurality of accommodating cavities arranged at intervals along the circumferential direction of the first tube body are provided inside the filter column, the filter element is arranged in the accommodating cavity, and the end of the suction nozzle facing away from the first tube body is toward the filter element; the first valve body is opened, and the driving member drives the first tube body to drive the suction nozzle to rotate, so that the end of the suction nozzle facing away from the first tube body is arranged opposite to at least one of the filter elements; the liquid in the cavity enters the suction nozzle through the filter element arranged opposite to the suction nozzle, thereby flushing the filter element; along the circumferential direction of the first tube body, the filter element in the accommodating cavity spaced apart from the suction nozzle forms a filtration of the liquid in the cavity.

[0007] Optionally, the filter element further includes a filter screen, which is sleeved on the first tube body along the circumferential direction of the first tube body; the filter screen and the filter column are spaced apart along the axial direction, the filter screen forms a primary filtration of the liquid entering the cavity, and the filter column forms a secondary filtration of the liquid.

[0008] Optionally, the self-cleaning filter also includes a second tube body and a second valve body, the second tube body is arranged in the cavity, the second tube body extends along the axial direction, one end of the second tube body is connected to the cavity, and the other end can be connected to the drain port, and the second valve body is arranged in the second tube body; the pressure difference between the liquid outlet and the liquid inlet reaches a preset value, the second valve body opens, the second tube body is connected to the drain port, the liquid in the cavity enters the second tube body through the filter screen to flush the filter screen, and the liquid entering the second tube body is discharged from the cylinder through the drain port.

[0009] Optionally, the self-cleaning filter also includes an elastic member, which is arranged in the cavity and extends along the axial direction. One end of the elastic member is connected to the driving member, and the other end is connected to the first tube body; the first tube body and the filter can move along the axial direction.

[0010] Optionally, the filter assembly further includes a movable ring and a support ring; the movable ring is arranged on the side of the filter screen away from the filter column along the axial direction, the movable ring is sleeved on the first tube body, and the movable ring can rotate with the first tube body; the support ring is connected to one end of the filter screen away from the filter column along the axial direction, the movable ring is inscribed in the support ring, and the movable ring can rotate relative to the support ring; the movable ring can drive the first tube body to move along the axial direction, and the movable ring can drive the filter screen to move along the axial direction through the support ring.

[0011] Optionally, the second tube body is connected to the first tube body through a connecting tube and communicates with the first tube body, and the liquid entering the second tube body enters the first tube body through the connecting tube to be discharged from the cylinder through the sewage outlet.

[0012] Optionally, the cylinder includes a partition, which is arranged in the cavity and inscribed in the cylinder, the partition divides the cavity into a first compartment and a second compartment arranged at intervals along the axial direction, and the partition is provided with a through hole for the first tube body to pass through; the filter column and the suction nozzle are arranged in the first compartment, the filter screen is arranged in the second compartment, and the filter screen cover is provided in the through hole; a liquid inlet and a liquid outlet are provided on the cylinder, the liquid inlet is connected to the second compartment, and the liquid outlet is connected to the first compartment.

[0013] Optionally, the self-cleaning filter further includes a differential pressure sensor; a liquid inlet pipe is inserted into the liquid inlet, a liquid outlet pipe is inserted into the liquid outlet, and the differential pressure sensors are respectively provided on the liquid inlet pipe and the liquid outlet pipe.

[0014] The filter element is connected to the filter element in a circumferential direction of the filter element, and the filter element is connected to the filter element in a circumferential direction of the filter element. When the pressure difference between the liquid outlet and the liquid inlet reaches a preset value, the first valve body opens, so that the pressure inside the suction nozzle is significantly lower than the pressure on the side of the cylinder cavity near the liquid outlet, thereby allowing the liquid in the cavity to enter the suction nozzle through the filter element, forming a backwash for the filter element, washing away impurities accumulated on the filter element, and combining with the suction force of the suction nozzle to suck the impurities into the first tube body, and then discharge them to the outside of the cylinder through the sewage outlet, thereby ensuring the cleaning effect and cleaning efficiency of the filter element, and backwashing the filter element with the liquid in the cavity can protect the filter element, reduce damage to the filter element, and increase the service life of the filter element, thereby increasing the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 Schematic diagram of the structure of the self-cleaning filter provided in an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the combined structure of the first tube body, the suction nozzle, and the filter column in the self-cleaning filter provided in an embodiment of the present application;

[0018] Figure 3 This is a schematic diagram of the combined structure of the first tube body, the support ring, and the movable ring in the self-cleaning filter provided in an embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of the combined structure of the first tube body, the first valve body, the second tube body and the second valve body in the self-cleaning filter provided in an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 1. Self-cleaning filter;

[0022] 10. Cylinder, 101. Cavity, 1011. First compartment, 1012. Second compartment, 11. Drain port, 12. Liquid inlet, 121. Liquid inlet pipe, 13. Liquid outlet, 131. Liquid outlet pipe, 14. Partition, 141. Through hole, 15. Opening, 16. Cover plate;

[0023] 20. Filter assembly, 21. First tube body, 22. Filter element, 221. Filter column, 2210. Accommodating chamber, 2211. Filter element, 222. Filter screen, 2221. First port, 2222. Second port, 23. Suction nozzle, 24. First valve body, 25. Movable ring, 26. Support ring;

[0024] 30. driving member, 31. transmission shaft;

[0025] 40. Second pipe body, 401. Connecting pipe, 41. Second valve body;

[0026] 50. Elastic parts;

[0027] 60. Differential pressure sensor;

[0028] X, axial direction. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0030] In some embodiments of the present application, a self-cleaning filter 1 is provided, referring to Figures 1 to 4 The self-cleaning filter 1 includes a cylinder 10 and a filter assembly 20 .

[0031] Reference Figure 1 A cavity 101 is provided inside the cylinder 10, and a sewage outlet 11 is opened on the cylinder 10, which is connected to the cavity 101. An opening 15 is provided at one end of the cylinder 10 away from the sewage outlet 11 along the height direction, and a cover plate 16 is covered on the opening 15. The liquid inlet 12 is adjacent to the sewage outlet 11 along the height direction of the cylinder 10.

[0032] Reference Figures 1 to 4 The filter assembly 20 is disposed in the cavity 101 of the cylinder 10. The filter assembly 20 includes a first tube 21, a filter element 22, a nozzle 23, and a first valve body 24. The first tube 21 extends along the height direction of the cylinder 10. Specifically, the first tube 21 has an axial direction X, which is parallel to the height direction of the cylinder 10. Figure 1 and Figure 2 The filter element 22 surrounds the first tube body 21 along the circumferential direction of the first tube body 21, and the suction nozzle 23 is arranged between the first tube body 21 and the filter element 22. One end of the suction nozzle 23 is connected to the first tube body 21 and communicates with the inner side of the first tube body 21, and the other end of the suction nozzle 23 faces the filter element 22. Figure 1 , one end of the first tube body 21 along the axial direction X is inserted into the drain port 11. In other words, the inner side of the first tube body 21 is connected to the drain port 11, and the first tube body 21 is connected to the outer side of the cylinder 10 through the drain port 11. The end of the first tube body 21 away from the drain port 11 along the axial direction X is closed to form a closed end. Figure 1 The first valve body 24 is provided at one end of the inner side of the first tube body 21 adjacent to the sewage outlet 11 , and the first valve body 24 controls the communication or blocking between the first tube body 21 and the sewage outlet 11 .

[0033] Among them, the liquid that needs to be filtered enters the cavity 101 of the cylinder 10 through the liquid inlet 12, and the filter element 22 filters the liquid in the cavity 101 entering the cylinder 10. The filtered liquid is discharged from the cylinder 10 through the liquid outlet 13. The pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the first valve body 24 is opened, and the first tube body 21 is connected to the sewage outlet 11. The liquid in the cavity 101 enters the suction nozzle 23 through the filter element 22 to flush the filter element 22. The liquid entering the suction nozzle 23 is discharged to the outside of the cylinder 10 through the first tube body 21 and the sewage outlet 11.

[0034] In order to ensure the continuity of operation of marine navigation tools such as ships, it is necessary to use a filter to filter the fuel used by the navigation tools and remove impurities in the fuel to ensure the performance of the fuel. As the filtering continues, more impurities will accumulate inside the filter, affecting the filtering effect of the filter. Therefore, the filter needs to be cleaned regularly to remove the impurities accumulated in the filter. Existing fuel filters usually have self-cleaning capabilities. Specifically, the self-cleaning method of existing filters is usually self-brushing. After long-term use of self-brushing filters, the cleaning brush will cause wear to the filter element and other filter components in the filter, affecting the service life of the filter element and other filter components, resulting in a shortened filter component replacement cycle, affecting the self-sustaining power and endurance of the navigation tool.

[0035] The self-cleaning filter 1 provided in the embodiment of the present application is provided with a sewage outlet 11 on the barrel 10, and a filter assembly 20 is arranged in the cavity 101 of the barrel 10, the filter assembly 20 includes a first tube body 21, a filter element 22, a suction nozzle 23 and a first valve body 24, the filter element 22 surrounds the first tube body 21 along the circumferential direction of the first tube body 21, and the suction nozzle 23 is arranged between the first tube body 21 and the filter element 22, one end of the suction nozzle 23 is connected to the first tube body 21 and communicates with the inner side of the first tube body 21, and the other end of the suction nozzle 23 faces the filter element 22, and one end of the first tube body 21 along the axial direction X is inserted into the sewage outlet 11, and the first valve body 24 is connected to the first tube body 21. It is arranged on one end of the inner side of the first tube body 21 adjacent to the drain outlet 11, and the first valve body 24 is used to control the connection or blockage between the first tube body 21 and the drain outlet. The filter element 22 filters the liquid (such as marine fuel and lubricating oil) entering the cavity 101 of the cylinder body 10 to filter out impurities in the liquid. When the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the first valve body 24 is opened, the first tube body 21 is connected with the drain outlet 11, and the liquid in the cavity 101 enters the suction nozzle 23 through the filter element 22 to flush the filter element 22. The liquid entering the suction nozzle 23 is discharged from the cylinder body 10 through the first tube body 21 and the drain outlet 11.

[0036] Specifically, due to the continuous filtering of the liquid (such as marine fuel and lubricating oil) entering the cavity 101 of the cylinder 10 by the filter element 22, impurities such as the filtered filter residue accumulate in the filter element 22. The filter residue and other impurities are usually sticky and adhere to the filter element 22, which easily leads to the clogging of the filter element 22. The aggravation of the clogging causes the pressure on the side of the cavity 101 of the cylinder 10 near the liquid outlet 13 to rise. As the amount of liquid entering the liquid inlet 12 increases, the pressure difference between the liquid outlet 13 and the liquid inlet 12 increases. The pressure inside the first tube 21 is consistent with that outside the cylinder 10, that is, the pressure inside the first tube 21 is significantly lower than the pressure in the cavity 101, and one end of the suction nozzle 23 is connected to the inside of the first tube 21, so that the internal pressure of the suction nozzle 23 is also lower than the pressure inside the filter element 22, forming a pressure difference. The existence of the pressure difference makes the suction nozzle 23 The nozzle 23 generates a large suction force on the liquid in the cavity 101, so that the liquid in the cavity 101 enters the suction nozzle 23 through the filter element 22, forming a backwash of the filter element 22, and the suction nozzle 23 can also absorb impurities such as filter residue adhering to the filter element 22. The liquid entering the suction nozzle 23 through the filter element 22 can flush the filter residue and other impurities accumulated in the filter element 22, and the liquid and the filter residue it carries are sucked into the suction nozzle 23. The liquid entering the suction nozzle 23 and the filter residue it carries enter the first tube body 21 and are discharged through the sewage outlet 11, thereby discharging the filter residue and other impurities accumulated in the filter element 22 out of the cylinder 10, achieving the flushing of the filter element 22, improving the service life of the filter element 22, and extending the replacement cycle of the filter element 22. Moreover, compared with the existing self-brushing cleaning method, the filter element 22 is flushed by the liquid in the cavity 101, which reduces the damage to the filter element 22 during the cleaning process, further improves the service life of the filter element 22, improves the service life of the self-cleaning filter 1, and reduces maintenance costs.

[0037] Among them, since the filter element 22 surrounds the first tube body 21 along the circumferential direction of the first tube body 21, the liquid filtered by the filter element 22 is discharged from the cylinder 10 through the liquid outlet 13. Since the pressure on the side of the cavity 101 close to the liquid outlet 13 is relatively large, the pressure inside the filter element 22 is higher than the pressure outside the filter element 22. Therefore, after the first valve body 24 is opened, the liquid on the outside of the filter element 22 in the cavity 101, that is, the liquid on the side of the liquid outlet 13 in the cavity 101, that is, the liquid filtered by the filter element 22, passes through the filter element 22 into the suction nozzle 23 under the action of the suction force of the suction nozzle 23, thereby backwashing the filter element 22. In this way, the probability of the unfiltered liquid in the cavity 101 flushing the filter element 22 is reduced, thereby reducing the probability of the unfiltered liquid flushing the filter element 22 and bringing new filter residue into the filter element 22, thereby improving the flushing effect of the filter element 22.

[0038] Among them, the first valve body 24 can be closed after being opened for a period of time. Specifically, when the pressure difference between the liquid outlet 13 and the liquid inlet 12 is lower than the preset value, the first valve body 24 is closed to disconnect the connection between the first tube body 21 and the sewage outlet 11, and the self-cleaning filter 1 continues to filter the liquid entering the cavity 101 through the liquid inlet 12.

[0039] In some embodiments, reference Figure 1 and Figure 2 The filter element 22 includes a filter column 221, which is annular in shape. The filter column 221 surrounds the first tube body 21 along the circumferential direction of the first tube body 21. A filter element 2211 is provided inside the filter column 221. The filter column 221 filters the liquid entering the cavity 101 of the cylinder 10 through the filter element 2211. The end of the suction nozzle 23 facing away from the first tube body 21 faces the filter column 221. The pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value. The liquid in the cavity 101 filtered by the filter column 221 enters the suction nozzle 23 through the filter column 221, thereby flushing the filter element 2211 in the filter column 221. After continuous filtration of the filter element 2211 in the filter column 221, a large amount of filter residue is accumulated in the filter element 2211, which affects the fluidity of the liquid entering the cavity 101, causing the pressure difference between the liquid outlet 13 and the liquid inlet 12 to rise. When the pressure difference reaches a preset value, the first valve body 24 opens to connect the sewage outlet 11 with the first tube body 21, and the suction nozzle 23 is connected to the outside of the cylinder 10 through the first tube body 21 and the sewage outlet 11. The pressure inside the suction nozzle 23 is less than the pressure inside the filter element 2211 in the filter column 221, forming a pressure difference. By using the pressure difference, the suction nozzle 23 The liquid in the cavity 101, especially the liquid outside the filter column 221 (i.e., the liquid filtered by the filter column 221 near the liquid outlet 13 in the cavity 101), is absorbed. The liquid in the cavity 101, especially the liquid outside the filter column 221 (i.e., the liquid filtered by the filter column 221), passes through the filter column 221 and enters the suction nozzle 23, thereby flushing the filter element 2211 in the filter column 221. This ensures the flushing effect of the filter element 2211 and reduces the probability of introducing new filter residue and other impurities during the flushing process. Furthermore, the suction nozzle 23 can absorb impurities such as filter residue adhering to the filter element 2211, thereby improving the flushing effect.

[0040] Specifically, due to the continuous filtering of the liquid (such as marine fuel and lubricating oil) entering the cavity 101 of the cylinder 10 by the filter element 22, impurities such as filtered filter residues accumulate in the filter element 2211 of the filter column 221. The filter residues and other impurities are usually sticky and adhere to the filter element 2211, which can easily cause the filter element 2211 to be blocked. The aggravation of the blockage causes the pressure on the side of the cavity 101 of the cylinder 10 near the liquid outlet 13 to rise. As the amount of liquid entering the liquid inlet 12 increases, the pressure difference between the liquid outlet 13 and the liquid inlet 12 becomes larger and larger. When the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the first valve body 24 opens, and the suction nozzle 23 is connected to the outside of the cylinder 10 through the first tube body 21 and the sewage outlet 11. The pressure inside the suction nozzle 23 is lower than the pressure inside the filter element 2211, so that the suction nozzle 23 absorbs the liquid in the cavity 101, especially the liquid outside the filter column 221 (the liquid on the side of the cavity 101 close to the liquid outlet 13), so that the liquid enters the suction nozzle 23 through the filter column 221, thereby flushing the filter element 2211 in the filter column 221.

[0041] In some embodiments, reference Figure 1 The self-cleaning filter 1 further includes a driving member 30, which is disposed outside the cylinder 10 and is connected to the first tube 21. Figure 1 In the embodiment shown, the driving member 30 is arranged on the side of the cover plate 16 away from the first tube body 21 along the axial direction X. The output end of the driving member 30 is connected to the transmission shaft 31. The end of the transmission shaft 31 away from the driving member 30 passes through the cover plate 16 and extends into the cavity 101 and is connected to the first tube body 21. Figure 2 The filter column 221 is provided with a plurality of accommodating cavities 2210 arranged at intervals along the circumferential direction of the first tube body 21, and the filter element 2211 is arranged in the accommodating cavity 2210. Specifically, a filter element 2211 is provided in each accommodating cavity 2210, and the plurality of filter elements 2211 are arranged at intervals along the circumferential direction of the first tube body 21, and the end of the suction nozzle 23 away from the first tube body 21 is directed toward the filter element 2211. When the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the first valve body 24 opens, the driving member 30 opens and drives the first tube body 21 to rotate, and the first tube body 21 drives the suction nozzle 23 to rotate, so that the end of the suction nozzle 23 away from the first tube body 21 is arranged opposite to at least one filter element 2211, and the liquid in the cavity 101 enters the suction nozzle 23 through the filter element 2211 arranged opposite to the suction nozzle 23, thereby flushing the filter element 2211 arranged opposite to the suction nozzle 23. Along the circumferential direction of the first tube body 21, the filter element 2211 in the accommodating cavity 2210 spaced apart from the suction nozzle 23 filters the liquid in the cavity 101.

[0042] In some embodiments, the driving member 30 is a motor. In other implementations, the driving member 30 can rotate other driving devices that can drive the first tube 21 to rotate.

[0043] Specific as Figure 2 In the embodiment shown, one end of the suction nozzle 23 facing away from the first tube body 21 is arranged opposite to a filter element 2211, that is, when the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the driving member 30 drives the first tube body 21 to rotate through the transmission shaft 31, and the first tube body 21 drives the suction nozzle 23 to rotate, so that the suction nozzle 23 is arranged opposite to the filter element 2211 in the accommodating cavity 2210, and the first valve body 24 is opened to connect the first tube body 21 with the sewage outlet 11, and the suction nozzle 23 sucks the liquid in the cavity 101, and the liquid in the cavity 101 enters the suction nozzle 23 through the filter element 2211 arranged opposite to the suction nozzle 23, forming a pair with the suction nozzle. 23 is flushed, and since the first tube body 21 is inserted in the sewage outlet 11, the filter element 2211 in the accommodating cavity 2210 which is spaced apart from the suction nozzle 23 (that is, the filter element 2211 not arranged opposite to the suction nozzle 23) can continue to filter the liquid in the cavity 101. In other words, when the first valve body 24 is opened to backwash the filter element 2211 which is arranged opposite to the suction nozzle 23, the other filter elements 2211 which are spaced apart from the suction nozzle 23 in the filter column 221 perform the filtering work normally, which does not affect the filtering operation of the self-cleaning filter 1, thereby ensuring the flushing effect while ensuring the smooth progress of the filtering work.

[0044] In some embodiments, reference Figure 2 , the number of accommodating cavities 2210 in the filter column 221 is 12, and accordingly, the number of filter elements 2211 in the filter column 221 is 12, which are arranged at intervals along the circumferential direction of the first tube body 21. The driving member 30 drives the first tube body 21 to rotate 30° each time through the transmission shaft 31, so that the suction nozzle 23 is arranged opposite to the filter element 2211 in one accommodating cavity 2210 each time, that is, each time a filter element 2211 is flushed, while ensuring the flushing effect and the smooth progress of the filtration work. In other implementations, the number of accommodating cavities 2210 in the filter column 221 can be selected according to actual use requirements. In other implementations, the number of accommodating cavities 2210 arranged opposite to the suction nozzle 23 can be adjusted according to actual use requirements. For example, the end of the suction nozzle 23 facing away from the first tube body 21 can be arranged opposite to the filter elements 2211 in two or more accommodating cavities 2210.

[0045] In some embodiments, the first valve body 24 is an electric valve or a solenoid valve.

[0046] In some embodiments, reference Figure 1The filter element 22 further includes a filter screen 222, which is annular in shape and is sleeved on the first tube body 21 along the circumferential direction of the first tube body 21. The filter screen 222 and the filter column 221 are spaced apart along the axial direction X of the first tube body 21. The filter screen 222 performs a primary filtration on the liquid entering the cavity 101, while the filter column 221 performs a secondary filtration on the liquid. In other words, the liquid to be filtered enters the cavity 101 through the liquid inlet 12 and passes through the filter screen 222. The filter screen 222 performs a primary filtration on the liquid to be filtered. The filter element 2211 in the filter column 221 performs a secondary filtration on the liquid filtered by the filter screen 222, and then discharges the liquid through the liquid outlet 13, thereby ensuring the filtration effect on the liquid.

[0047] In some embodiments, along the axial direction X, the inner diameter of the port of the filter screen 222 adjacent to the filter column 221 is larger than the inner diameter of the port of the filter screen 222 away from the filter column 221, so that the filter screen 222 forms an inverted trapezoidal structure to increase the filtering area of ​​the liquid and improve the filtering effect.

[0048] In some embodiments, reference Figure 1 and Figure 4 The self-cleaning filter 1 further includes a second tube body 40 and a second valve body 41. The second tube body 40 is disposed in the cavity 101 of the cylinder 10. The second tube body 40 extends along the axial direction X. One end of the second tube body 40 is in communication with the cavity 101, and the other end is capable of being in communication with the drain outlet 11. The second valve body 41 is disposed in the second tube body 40. The second valve body 41 controls the communication or blocking between the second tube body 40 and the drain outlet 11. When the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the second valve body 41 opens, the second tube body 40 is in communication with the drain outlet 11, and the liquid in the cavity 101 enters the second tube body 40 through the filter screen 222 to flush the filter screen 222. The liquid entering the second tube body 40 is discharged from the cylinder 10 through the drain outlet 11.

[0049] Specifically, due to the continuous filtering of the liquid (such as marine fuel and lubricating oil) entering the cavity 101 of the cylinder 10 by the filter 222, impurities such as the filtered filter residue accumulate in the filter 222. The filter residue and other impurities are usually sticky and adhere to the filter 222, which can easily cause the filter 222 to be blocked. The aggravation of the blockage causes the pressure on the side of the cavity 101 of the cylinder 10 near the liquid outlet 13 to rise. As the amount of liquid entering the liquid inlet 12 increases, the pressure difference between the liquid outlet 13 and the liquid inlet 12 becomes larger and larger. When the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the second valve body 41 opens, the second pipe body 40 is connected to the sewage outlet 11, and the second pipe body 40 is connected to the outside of the cylinder 10 through the sewage outlet 11. The cavity 101 is connected to the outside of the cylinder 10 through the second pipe body 40 and the sewage outlet 11. The pressure difference between the inner side of 10 and the outer side of the cylinder 10 causes the liquid in the cavity 101, especially the liquid on the side of the cavity 101 near the liquid outlet 13 (that is, the liquid filtered by the filter column 221) to flow toward the direction close to the sewage outlet 11, so that part of the liquid passes through the filter column 221 and then passes through the filter screen 222, thereby flushing the filter screen 222, removing impurities such as filter residue adhering to the filter screen 222, and then, under the action of the pressure difference, the filter residue and other impurities are carried into the second tube body 40 and discharged from the cylinder 10 through the sewage outlet 11, thereby improving the service life of the filter screen 222, extending the replacement cycle of the filter screen 222, and improving the service life of the self-cleaning filter 1. In addition, using the liquid in the cavity 101 to flush the filter screen 222 can avoid damage to the filter screen 222 by the self-brushing cleaning method, thereby extending the service life of the filter screen 222.

[0050] When the pressure difference between the liquid outlet 13 and the liquid inlet 12 is lower than the preset value, the second valve body 41 is closed, ending the flushing of the filter screen 222 and disconnecting the connection between the second tube body 40 and the sewage outlet 11. The self-cleaning filter 1 continues to filter the liquid entering the cavity 101 through the liquid inlet 12.

[0051] In some embodiments, the second valve body 41 is an electric valve or a solenoid valve.

[0052] In some embodiments, reference Figure 1The self-cleaning filter 1 also includes an elastic member 50, which is arranged in the cavity 101. The elastic member 50 extends along the axial direction X. One end of the elastic member 50 is connected to the driving member 30. Specifically, one end of the elastic member 50 is connected to the transmission shaft 31, and the other end of the elastic member 50 is connected to the first tube body 21. The first tube body 21 can drive the filter screen 222 to move along the axial direction X. Specifically, when the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the second valve body 41 opens. The pressure difference between the liquid outlet 13 and the sewage outlet 11 allows the liquid in the cavity 101 to move along the axial direction X toward the filter screen 222. In the process of moving toward the filter screen 222, part of the liquid can drive the first tube body 21 to move along the axial direction X, move upward, and then cause the first tube body 21 to move along the axial direction X. Under the action of the elastic member 50, the first tube body 21 moves along the axial direction X. Moreover, the filter screen 222 is sleeved on the first tube body 21, so that the filter screen 222 can move along the axial direction X with the first tube body 21, causing the filter screen 222 to vibrate. Combined with the flushing of the filter screen 222 by the liquid, stubborn impurities on the filter screen 222 can be shaken off. Under the action of the pressure difference between the liquid outlet 13 and the sewage outlet 11, the liquid is discharged from the cylinder through the second tube body 40 and the sewage outlet 11, thereby improving the flushing effect and cleaning efficiency of the filter screen 222. Moreover, part of the liquid in the cavity 101 passes through the filter column 221 and then flows to the filter screen 222, which can flush the filter element 2211 in the filter column 221, further improving the flushing effect and cleaning efficiency.

[0053] In some embodiments, reference Figure 1 and Figure 3 The filter assembly 20 includes a movable ring 25 and a support ring 26. The movable ring 25 is arranged on the side of the filter screen 222 away from the filter column 221 along the axial direction X. The movable ring 25 is sleeved on the first tube body 21. The movable ring 25 can rotate with the first tube body 21, that is, the driving member 30 drives the first tube body 21 to rotate through the transmission shaft 31 and the elastic member 50, and the first tube body 21 drives the movable ring 25 to rotate. The support ring 26 is connected to one end of the filter screen 222 away from the filter column 221 along the axial direction X. The movable ring 25 is inscribed in the support ring 26. The movable ring 25 can rotate relative to the support ring 26, that is, when the movable ring 25 rotates with the first tube body 21, the support ring 26 can remain stationary relative to the movable ring 25, so that when the first tube body 21 rotates, the filter screen 222 can remain relatively stationary, without affecting the use of the filter screen 222.

[0054] Among them, the movable ring 25 can drive the first tube body 21 to move along the axial direction X, and the movable ring 25 can drive the filter screen 222 to move along the axial direction X through the support ring 26. Specifically, when the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the second valve body 41 is opened, and the second tube body 40 is connected to the sewage outlet 11. By utilizing the pressure difference between the liquid outlet 13 and the sewage outlet 11, the liquid in the cavity 101 moves toward the direction close to the filter screen 222. During the movement, the liquid can push the movable ring 25, so that the movable ring 25 drives the first tube body 21 to move toward the direction close to the sewage outlet 11. Under the action of the elastic member 50 pulling the first tube body 21, the first tube body 21 and the movable ring 25 can move back and forth along the axial direction X. Since the movable ring 25 is connected to the support ring 26, and the support ring 26 is connected to the filter screen 222, the movable ring 25 can drive the filter screen 222 to move back and forth along the axial direction X through the support ring 26, thereby realizing the vibration of the filter screen 222 along the axial direction X. Combined with the flushing of the filter screen 222 by the liquid, the impurities of the filter residue adhering to the filter screen 222 can be effectively shaken off, thereby improving the cleaning effect of the filter screen 222 and extending the service life of the filter screen 222.

[0055] In some embodiments, reference Figure 4 The second tube body 40 is connected to the first tube body 21 through the connecting tube 401 and communicates with the first tube body 21. Specifically, one end of the connecting tube 401 is connected to the first tube body 21 and communicates with the inner side of the first tube body 21, and the other end of the connecting tube 401 is connected to the second tube body 40 and communicates with the inner side of the second tube body 40. The second valve body 41 forms a control for connecting or disconnecting the second tube body 40 and the sewage outlet 11. The liquid entering the second tube body 40 enters the first tube body 21 through the connecting tube 401 to be discharged from the cylinder 10 through the sewage outlet 11, so that the second tube body 40 is communicated with the sewage outlet 11 through the connecting tube 401 and the first tube body 21. The first tube body 21 and the second tube body 40 share a sewage outlet 11, which can improve the sealing performance of the cylinder 10 and improve the space utilization rate of the internal cavity 101 of the cylinder 10.

[0056] In some embodiments, reference Figure 1The cylinder 10 includes a partition 14, which is arranged in the cavity 101 and inscribed in the cylinder 10. The partition 14 divides the cavity 101 into a first compartment 1011 and a second compartment 1012 arranged at intervals along the axial direction X. The partition 14 is provided with a through hole 141 for the first tube 21 to pass through. The filter column 221 and the suction nozzle 23 are arranged in the first compartment 1011, and the filter screen 222 is arranged in the second compartment 1012. The filter screen 222 abuts against the partition 14 along the axial direction X. The filter screen 222 is covered by the through hole 141. The liquid inlet 12 is connected to the second compartment 1012, and the liquid outlet 13 is connected to the first compartment 1011. The setting of the partition 14 can form support for the filter column 221 in the cavity 101 and provide an installation basis for the filter screen 222, thereby ensuring the installation stability of the filter column 221 and the filter screen 222 in the cavity 101 and ensuring the filtering effect of the self-cleaning filter 1.

[0057] In some embodiments, reference Figure 1 The self-cleaning filter 1 also includes a differential pressure sensor 60. The liquid inlet 12 is opened on one side wall of the cylinder 10, and a liquid inlet pipe 121 is inserted into the liquid inlet 12. The liquid outlet 13 is opened on the other side wall of the cylinder 10, and a liquid outlet pipe 131 is inserted into the liquid outlet 13. A differential pressure sensor 60 is respectively provided on the liquid inlet pipe 121 and the liquid outlet pipe 131. The differential pressure sensor 60 provided on the liquid inlet pipe 121 monitors the pressure near the liquid inlet 12, and the differential pressure sensor 60 provided on the liquid outlet pipe 131 monitors the pressure near the liquid outlet 13, thereby determining whether the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value.

[0058] In some embodiments, the preset value of the pressure difference between the liquid inlet 12 and the liquid outlet 13 is 1.2 bar to 1.6 bar. Specifically, the preset value of the pressure difference between the liquid inlet 12 and the liquid outlet 13 can be any value among 1.2 bar, 1.3 bar, 1.4 bar, 1.5 bar, 1.6 bar, or any value in a range of values ​​consisting of any two values. When the preset value of the pressure difference between the liquid inlet 12 and the liquid outlet 13 is within the above range, the self-cleaning filter 1 can promptly flush the filter column 221 and the filter screen 222, thereby preventing the filter element 2211 and the filter screen 222 in the filter column 221 from adhering to excessive impurities such as filter residue and affecting the filtering effect, thereby ensuring the service life of the filter element 2211 and the filter screen 222, extending the replacement cycle of the filter element 2211 and the filter screen 222, and reducing costs.

[0059] The self-cleaning filter 1 provided in the embodiment of the present application is used as follows:

[0060] The pressure difference between the liquid outlet 13 and the liquid inlet 12 is monitored by the pressure differential sensor 60. When the pressure difference is lower than a preset value, the liquid mixed with impurities (such as marine fuel and lubricating oil) is transported to the cavity 101 of the cylinder 10 through the liquid inlet 12, and then the liquid is initially filtered by the filter 222, and large particles of impurities in the liquid are retained on the outside of the filter 222. The filtered liquid enters the first compartment 1011 through the through hole 141. After the liquid is filtered twice from the first compartment 1011 through the filter element 2211 in the filter column 221, it is discharged from the liquid outlet 13 of the cylinder 10, completing the entire fluid filtration process. During this process, the drive member 30 does not operate, and the first valve body 24 and the second valve body 41 are both in the closed state.

[0061] As the working time of the self-cleaning filter 1 increases, more and more impurities such as filter residue adsorbed on the filter screen 222 and the filter element 2211 will cause the pressure difference between the liquid outlet 13 and the liquid inlet 12 to become larger and larger. When the pressure difference sensor 60 detects that the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the first valve body 24 is opened, the first tube body 21 is connected to the sewage outlet 11, and the suction nozzle 23 is connected to the outside of the cylinder 10 through the first tube body 21 and the sewage outlet 11. The driving member 30 is turned on, and the driving member 30 drives the elastic member 50 and the first tube body 21 to rotate through the transmission shaft 31, so that the suction nozzle 23 It is arranged opposite to the filter element 2211 in an accommodating cavity 2210. Since the suction nozzle 23 is connected to the outside of the cylinder 10, the pressure inside the suction nozzle 23 is lower than the pressure inside the filter element 2211. The suction nozzle 23 absorbs the liquid in the cavity 101, especially the liquid near the liquid outlet 13, so that the liquid in the cavity 101 flows through the filter element 2211 in the filter column 221 and enters the suction nozzle 23, forming a backwash of the filter element 2211 arranged opposite to the suction nozzle 23 in the filter column 221. The liquid entering the suction nozzle 23 is discharged from the cylinder 10 through the first tube body 21 and the sewage outlet 11. During this period, the driving member 30 rotates 30° at regular intervals (the time can be adjusted according to the specific situation) to backwash the filter elements 2211 in different accommodating cavities 2210 in turn. After the driving member 30 drives the first tube body 21 to rotate one circle, the backwashing of the filter elements 2211 in the 12 accommodating cavities 2210 is completed, the first valve body 24 and the driving member 30 are closed, and the backwashing of the filter element 2211 in the filter column 221 is ended.

[0062] As the working time of the self-cleaning filter 1 increases, more and more impurities such as filter residue are adsorbed on the filter screen 222 and the filter element 2211, resulting in a larger and larger pressure difference between the liquid outlet 13 and the liquid inlet 12. When the pressure difference sensor 60 detects that the pressure difference between the liquid outlet 13 and the liquid inlet 12 reaches a preset value, the second valve body 41 is opened, and the second tube body 40 is connected to the sewage outlet 11 through the connecting pipe 401 and the first tube body 21. The cavity 101 is connected to the outside of the cylinder 10 through the second tube body 40 and the sewage outlet 11. Due to the pressure difference between the inside and outside of the cylinder 10, the liquid in the cavity 101 flows toward the sewage outlet 11. When the continuously flowing liquid flows through the filter screen 222, it flushes the filter screen 222, and part of the liquid flows along the first tube body 21 to the sewage outlet 11. The liquid flows in the direction of the flow, and pushes the movable ring 25 during the flow, so that the movable ring 25 drives the first tube body 21 to move in the direction close to the sewage outlet 11. Under the action of the elastic member 50 pulling the first tube body 21, the first tube body 21 and the movable ring 25 can move back and forth in the axial direction X. Moreover, the movable ring 25 is internally connected to the support ring 26, and the support ring 26 is connected to the filter screen 222, so that the movable ring 25 can drive the filter screen 222 to move back and forth in the axial direction X through the support ring 26, thereby realizing the vibration of the filter screen 222 in the axial direction X. Combined with the flushing of the filter screen 222 by the liquid, the stubborn impurities on the filter screen 222 are shaken off and enter the sewage outlet 11 along with the liquid through the second tube body 40 and are discharged from the cylinder 10. After the set time is reached, the second valve body 41 is closed to end the backwashing of the filter screen 222.

[0063] The backwashing of the filter element 2211 and the backwashing of the filter screen 222 can be performed simultaneously or separately, depending on the actual use requirements.

[0064] The above is a detailed introduction to a self-cleaning filter provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A self-cleaning filter, characterized in that: include: A cylinder (10) is provided with a cavity (101) therein, and the cylinder (10) is provided with a sewage outlet (11), a liquid inlet (12) and a liquid outlet (13) respectively connected to the cavity (101); A filter assembly (20) is arranged in the cavity (101), the filter assembly (20) comprising a first tube body (21), a filter element (22), a suction nozzle (23) and a first valve body (24), the filter element (22) surrounds the first tube body (21) along the circumferential direction of the first tube body (21), one end of the suction nozzle (23) is connected to the first tube body (21) and communicates with the inner side of the first tube body (21), and the other end faces the filter element (22), one end of the first tube body (21) along the axial direction X thereof is inserted into the sewage outlet (11), and the first valve body (24) is arranged on one end of the inner side of the first tube body (21) adjacent to the sewage outlet (11); The filter element (22) filters the liquid entering the cavity (101); When the pressure difference between the liquid outlet (13) and the liquid inlet (12) reaches a preset value, the first valve body (24) is opened, the first tube body (21) is connected to the sewage outlet (11), and the liquid in the cavity (101) enters the suction nozzle (23) through the filter element (22) to flush the filter element (22), and the liquid entering the suction nozzle (23) is discharged from the cylinder (10) through the first tube body (21) and the sewage outlet (11).

2. The self-cleaning filter according to claim 1, wherein The filter element (22) comprises a filter column (221), the filter column (221) surrounds the first tube body (21) along the circumferential direction of the first tube body (21), a filter element (2211) is provided inside the filter column (221), and the end of the suction nozzle (23) facing away from the first tube body (21) faces the filter column (221); When the pressure difference between the liquid outlet (13) and the liquid inlet (12) reaches a preset value, the first valve body (24) opens, and the liquid in the cavity (101) enters the suction nozzle (23) through the filter column (221), thereby flushing the filter element (2211) in the filter column (221).

3. The self-cleaning filter according to claim 2, characterized in that The self-cleaning filter further comprises a driving member (30), wherein the driving member (30) is arranged outside the cylinder (10), and the driving member (30) is connected to the first tube (21); The filter column (221) is provided with a plurality of accommodating cavities (2210) spaced apart along the circumferential direction of the first tube body (21), the filter element (2211) is arranged in the accommodating cavities (2210), and the end of the suction nozzle (23) facing away from the first tube body (21) faces the filter element (2211); The first valve body (24) is opened, and the driving member (30) drives the first tube body (21) to drive the suction nozzle (23) to rotate, so that the end of the suction nozzle (23) facing away from the first tube body (21) is arranged opposite to at least one filter element (2211); The liquid in the cavity (101) enters the suction nozzle (23) through the filter element (2211) arranged opposite to the suction nozzle (23), thereby flushing the filter element (2211); Along the circumferential direction of the first tube body (21), the filter element (2211) in the accommodating cavity (2210) spaced apart from the suction nozzle (23) filters the liquid in the cavity (101).

4. The self-cleaning filter according to claim 3, characterized in that The filter element (22) further includes a filter screen (222), and the filter screen (222) is sleeved on the first tube body (21) along the circumferential direction of the first tube body (21); The filter screen (222) and the filter column (221) are spaced apart along the axial direction X. The filter screen (222) forms a primary filtration of the liquid entering the cavity (101), and the filter column (221) forms a secondary filtration of the liquid.

5. The self-cleaning filter according to claim 4, characterized in that The self-cleaning filter further comprises a second tube body (40) and a second valve body (41); the second tube body (40) is arranged in the cavity (101); the second tube body (40) extends along the axial direction X; one end of the second tube body (40) is in communication with the cavity (101); the other end of the second tube body (40) is capable of being in communication with the sewage outlet (11); and the second valve body (41) is arranged in the second tube body (40); When the pressure difference between the liquid outlet (13) and the liquid inlet (12) reaches a preset value, the second valve body (41) is opened, the second tube body (40) is connected to the sewage outlet (11), and the liquid in the cavity (101) enters the second tube body (40) through the filter (222) to flush the filter (222). The liquid entering the second tube body (40) is discharged from the cylinder (10) through the sewage outlet (11).

6. The self-cleaning filter according to claim 4, characterized in that The self-cleaning filter further comprises an elastic member (50), the elastic member (50) being arranged in the cavity (101), the elastic member (50) extending along the axial direction X, one end of the elastic member (50) being connected to the driving member (30), and the other end being connected to the first tube body (21); The first tube (21) and the filter (222) are capable of moving along the axial direction X.

7. The self-cleaning filter according to claim 6, characterized in that The filter assembly (20) further includes a movable ring (25) and a support ring (26); The movable ring (25) is arranged on a side of the filter screen (222) away from the filter column (221) along the axial direction X, and the movable ring (25) is sleeved on the first tube body (21), and the movable ring (25) can rotate along with the first tube body (21); The support ring (26) is connected to one end of the filter screen (222) away from the filter column (221) along the axial direction X, the movable ring (25) is inscribed in the support ring (26), and the movable ring (25) is rotatable relative to the support ring (26); The movable ring (25) can drive the first tube (21) to move along the axial direction X, and the movable ring (25) can drive the filter screen (222) to move along the axial direction X through the support ring (26).

8. The self-cleaning filter according to claim 5, characterized in that The second tube body (40) is connected to the first tube body (21) through a connecting tube (401) and communicates with the first tube body (21); liquid entering the second tube body (40) enters the first tube body (21) through the connecting tube (401) and is discharged from the cylinder (10) through the sewage outlet (11).

9. The self-cleaning filter according to claim 4, characterized in that The cylinder (10) comprises a partition (14), the partition (14) being arranged in the cavity (101) and inscribed in the cylinder (10), the partition (14) dividing the cavity (101) into a first compartment (1011) and a second compartment (1012) spaced apart along the axial direction X, and a through hole (141) for the first tube (21) to pass through is formed on the partition (14); The filter column (221) and the suction nozzle (23) are arranged in the first compartment (1011), the filter screen (222) is arranged in the second compartment (1012), and the filter screen (222) is covered in the through hole (141); The liquid inlet (12) is in communication with the second compartment (1012), and the liquid outlet (13) is in communication with the first compartment (1011).

10. The self-cleaning filter according to claim 9, characterized in that The self-cleaning filter further includes a differential pressure sensor (60); A liquid inlet pipe (121) is inserted into the liquid inlet (12), and a liquid outlet pipe (131) is inserted into the liquid outlet (13); The pressure difference sensor (60) is respectively provided on the liquid inlet pipe (121) and the liquid outlet pipe (131).

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