Backwash self-cleaning type double filter

Abstract

The utility model relates to the technical field of fluid filtration, and discloses a backwash self-cleaning double filter, which comprises a lower shell, the left end and the right end of the lower shell are open, one end of the lower shell is a feed port, the other end of the lower shell is a discharge port, a first filter part for coarse filtration is arranged in the lower shell, a blow-down valve is arranged at the discharge end of the first filter part, and a second filter part for coarse filtration is arranged at the discharge end of the blow-down valve. The surface of the lower shell is communicated with an upper shell which is vertically arranged, an inner cavity of the upper shell is provided with a second filtering piece for fine filtering, the upper shell is provided with a driving device, and a first filtering piece for coarse filtering and the second filtering piece for fine filtering are arranged, so that graded filtering of impurities with different sizes in fluid is realized, and the filtering efficiency is improved. The filter is simple in structure, the filter efficiency and the filter quality are effectively improved, a driving device and a cleaning assembly are further arranged, small-particle impurities attached to the second filter part can be cleaned regularly or as required through pressure intensity and rotation of the sewage discharging cavity, and complexity and high cost of manual cleaning are avoided.

Description

Technical Field

[0001] This utility model relates to the field of fluid filtration technology, specifically a backwashing self-cleaning dual filter. Background Technology

[0002] A filter is a device or component widely used in various fields. Its main function is to remove impurities from fluids. Depending on the application field and functional requirements, filters can be divided into various types such as air filters, water filters, oil filters, and fuel filters. Filters are widely used in industries such as metallurgy, chemical industry, petroleum, papermaking, pharmaceuticals, and food to remove impurities from fluids and ensure the stability of the production process and product quality.

[0003] Existing filters typically use fine filters. When the fluid to be filtered contains large particles of impurities (such as resin and plastic bags), whose size is much larger than the filter pore size, these large particles of impurities tend to accumulate rapidly on the filter media, causing the filter pore size to decrease rapidly or even completely block the filter path. This not only seriously affects the filtration efficiency of the filter, but also requires staff to clean the filter media regularly, increasing maintenance costs. Therefore, a backwashing self-cleaning dual filter is proposed to solve the above-mentioned problems. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a backwashing self-cleaning dual filter, including a lower shell with openings at both ends, one end being a feed inlet and the other end being a discharge outlet. A first filter element for coarse filtration is provided inside the lower shell, and a drain valve is provided at the discharge end of the first filter element. An upper shell is vertically arranged and connected to the surface of the lower shell, and a second filter element for fine filtration is provided in the inner cavity of the upper shell. A driving device is provided on the upper shell, and a cleaning component is provided at the output end of the driving device for cleaning small particulate impurities attached to the second filter element. A discharge outlet is connected to the upper shell.

[0005] Furthermore, the first filter element is a conical filter screen, with its larger diameter end connected to the discharge port of the lower housing. A limiting plate is detachably connected to the discharge port of the lower housing, and the smaller diameter end of the first filter element penetrates and extends to one side surface of the limiting plate.

[0006] Furthermore, the second filter element includes an inner frame fixedly installed inside the upper housing, a folded filter screen tightly attached to the inner surface of the inner frame, and an outer frame tightly attached to the inner surface of the folded filter screen. The inner frame, the folded filter screen, and the outer frame are all arranged vertically through each other.

[0007] Furthermore, the cleaning assembly includes a hollow tube fixedly connected to the output end of the drive device. A connecting seat is fixedly installed in the inner cavity of the upper housing. The end of the hollow tube away from the drive device is rotatably connected to the connecting seat. A drain chamber is communicated on the surface of the hollow tube, and the surface of the drain chamber away from the hollow tube is tightly fitted with the inner surface of the inner frame. A plurality of vertically equidistant interactive holes are opened on one side surface of the drain chamber. A cavity communicating with the hollow tube is opened on the connecting seat, and a drain pipe communicating with the cavity is provided on the connecting seat. A backwash ball valve is provided at the end of the drain pipe away from the connecting seat.

[0008] Furthermore, the sewage discharge chamber is provided with several partition plates, which can divide the sewage discharge chamber into multiple flow channels, and the multiple flow channels are all connected to the hollow pipe.

[0009] Furthermore, a reinforcing rib is provided between the sewage discharge chamber and the hollow pipe.

[0010] Furthermore, the upper housing is equipped with an inlet pressure sensor and an outlet pressure sensor.

[0011] The beneficial effects of this utility model are as follows: By setting a first coarse filter element and a second fine filter element, this utility model achieves graded filtration of impurities of different sizes in the fluid, effectively improving filtration efficiency and filtration quality. It also includes a drive device and a cleaning component. Through pressure and the rotation of the drain cavity, small particulate impurities attached to the second filter element can be cleaned periodically or as needed, avoiding the tedious and costly manual cleaning. Compared with existing technologies, this utility model can not only grade and filter impurities of different particle sizes in the fluid, ensuring filtration quality and efficiency, but also discharge the filtered impurities through pressure relief when the drain valve and backwash ball valve are opened, enhancing the self-cleaning function and improving the level of intelligence. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic cross-sectional view of the present invention;

[0015] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0016] The components are as follows: 1. Lower housing; 2. First filter element; 3. Drain valve; 4. Upper housing; 5. Second filter element; 51. Inner frame; 52. Folded filter screen; 53. Outer frame; 6. Drive device; 7. Cleaning assembly; 71. Hollow tube; 72. Connecting seat; 73. Drain chamber; 74. Interchange hole; 75. Cavity; 76. Drain pipe; 77. Backwash ball valve; 8. Discharge port; 9. Limiting plate; 10. Reinforcing rib; 11. Inlet pressure sensor; 12. Outlet pressure sensor. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In the embodiments, by Figure 1-4Provided is a backwashing self-cleaning dual filter, comprising a lower housing 1 with openings at both ends, one end being an inlet and the other an outlet. A first filter element 2 for coarse filtration is disposed within the lower housing 1, and a drain valve 3 is provided at the discharge end of the first filter element 2. An upper housing 4, vertically arranged, is connected to the surface of the lower housing 1, and a second filter element 5 for fine filtration is disposed within the cavity of the upper housing 4. A driving device 6 is disposed on the upper housing 4, and a cleaning component 7 is provided at the output end of the driving device 6 for cleaning small particulate impurities adhering to the second filter element 5. An outlet 8 is connected to the upper housing 4. The lower housing 1 and the upper housing 4 are integrally formed. The system effectively protects the internal graded filtration. The inlet of the lower housing 1 receives the fluid to be filtered, and then the fluid enters the first filter element 2, which can initially remove large particulate impurities in the fluid. The discharge end of the first filter element 2 is equipped with a drain valve 3, which is opened periodically to discharge accumulated large particulate impurities. The fluid gradually enters the second filter element 5 under hydraulic action. The second filter element 5 is used for fine filtration to further remove small particulate impurities in the fluid. When there are many impurities captured in the second filter element 5, the cleaning component 7 is controlled by the drive device 6 to clean the second filter element 5 and restore its filtration efficiency. The clean fluid after fine filtration is discharged from the outlet 8 of the upper housing 4 for subsequent use.

[0021] Reference Figure 1-4 The first filter element 2 is a cone-shaped filter screen, with its larger diameter end connected to the discharge port of the lower housing 1. The discharge port of the lower housing 1 is detachably connected to a limiting plate 9, and the smaller diameter end of the first filter element 2 penetrates and extends to one side surface of the limiting plate 9.

[0022] With the above structural setup, when the fluid enters the equipment through the inlet of the lower housing 1, it encounters the conical filter screen. The conical filter screen intercepts large particles of impurities in the fluid. At the same time, due to the special shape of the conical filter screen, the large particles of impurities gradually accumulate at the smaller diameter end of the first filter element 2. When the drain valve 3 is opened, the pressure inside the lower housing 1 is greater than the external pressure. Therefore, the fluid will carry the large particles of impurities out of the drain valve 3. The limiting plate 9 is fixed to the drain port of the lower housing 1 by fixing bolts, which not only supports the first filter element but also facilitates replacement.

[0023] Reference Figure 1-4 The second filter element 5 includes an inner frame 51 fixedly installed in the upper housing 4. A folded filter screen 52 is tightly attached to the inner surface of the inner frame 51. An outer frame 53 is tightly attached to the inner surface of the folded filter screen 52. The inner frame 51, the folded filter screen 52 and the outer frame 53 are all arranged vertically through each other.

[0024] With the above structural setup, after the fluid passes through coarse filtration, it enters the second filter element 5 above under pressure. Both the inner frame 51 and the outer frame 53 have through holes with the same diameter as the folded filter screen 52 on their surfaces. Therefore, small particulate impurities in the fluid will be intercepted in the inner frame 51, and the outer frame 53 can effectively support the folded filter screen 52, preventing it from deforming or being damaged under high pressure or high flow conditions.

[0025] Reference Figure 1-4 The cleaning component 7 includes a hollow tube 71 fixedly connected to the output end of the drive device 6. A connecting seat 72 is fixedly installed in the inner cavity of the upper housing 4. The end of the hollow tube 71 away from the drive device 6 is rotatably connected to the connecting seat 72. A drain chamber 73 is communicated on the surface of the hollow tube 71. The surface of the drain chamber 73 away from the hollow tube 71 is tightly fitted with the inner surface of the inner frame 51. A plurality of vertically equidistant interactive holes 74 are opened on one side surface of the drain chamber 73. A cavity 75 communicating with the hollow tube 71 is opened on the connecting seat 72. A drain pipe 76 communicating with the cavity 75 is provided on the connecting seat 72. A backwash ball valve 77 is provided at the end of the drain pipe 76 away from the connecting seat 72.

[0026] With the above structural setup, when the second filter element 5 intercepts too many small particulate impurities, it is necessary to clean the impurities in time. The drive device 6 is started, and the drive device 6 controls the hollow tube 71 to rotate axially, which in turn drives the drainage chamber 73 to rotate. At the same time, the backwash ball valve 77 is opened. Since the internal pressure of the upper shell 4 is greater than the external pressure, the fluid will flow from the upper shell 4 into the drainage chamber 73 in the opposite direction. At the same time, the small particulate impurities intercepted by the second filter element 5 are carried to the drainage chamber 73 and discharged through the cavity 75 and the drainage pipe 76, thus achieving impurity cleaning.

[0027] Reference Figure 1-4 The sewage discharge chamber 73 is provided with several partition plates, which can divide the sewage discharge chamber 73 into multiple flow channels, and the multiple flow channels are connected to the hollow pipe 71.

[0028] Through the above structural design, the partition plate makes the fluid flow in the sewage chamber 73 more orderly and efficient, and the multiple flow channels make the cleaning process more uniform and comprehensive, reducing cleaning dead corners and blind spots.

[0029] Reference Figure 1-4 Among them, a reinforcing rib 10 is provided between the sewage discharge chamber 73 and the hollow pipe 71;

[0030] The above structural design enhances the connection stability between the sewage discharge chamber 73 and the hollow tube 71, preventing accidental displacement of the sewage discharge chamber 73 during movement and thus preventing damage to the second filter element 5.

[0031] Reference Figure 1-4 The upper housing 4 is equipped with an inlet pressure sensor 11 and an outlet pressure sensor 12.

[0032] With the above structural configuration, the inlet pressure sensor 11 and outlet pressure sensor 12 installed on the upper housing 4 monitor the pressure values ​​of the fluid at the inlet and outlet of the filter in real time, thereby ensuring the stable operation and performance optimization of the filter.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backwashing self-cleaning dual filter, characterized in that: The device includes a lower housing (1) with openings at both ends, one end being a feed inlet and the other end being a discharge outlet. The lower housing (1) contains a first filter element (2) for coarse filtration, and the discharge end of the first filter element (2) is equipped with a drain valve (3). The surface of the lower housing (1) is connected to an upper housing (4) that is arranged vertically, and the inner cavity of the upper housing (4) contains a second filter element (5) for fine filtration. The upper housing (4) is equipped with a drive device (6), and the output end of the drive device (6) is equipped with a cleaning component (7) for cleaning small particulate impurities attached to the second filter element (5). The upper housing (4) is connected to a discharge outlet (8).

2. The backwashing self-cleaning dual filter according to claim 1, characterized in that: The first filter element (2) is a cone-shaped filter screen. Its larger diameter end is connected to the discharge port of the lower housing (1). The discharge port of the lower housing (1) is detachably connected to a limiting plate (9). The smaller diameter end of the first filter element (2) penetrates and extends to one side surface of the limiting plate (9).

3. The backwashing self-cleaning dual filter according to claim 1, characterized in that: The second filter element (5) includes an inner frame (51) fixedly installed in the upper housing (4), a folded filter screen (52) is tightly attached to the inner surface of the inner frame (51), and an outer frame (53) is tightly attached to the inner surface of the folded filter screen (52). The inner frame (51), the folded filter screen (52) and the outer frame (53) are all arranged vertically.

4. The backwashing self-cleaning dual filter according to claim 3, characterized in that: The cleaning assembly (7) includes a hollow tube (71) fixedly connected to the output end of the drive device (6). A connecting seat (72) is fixedly installed in the inner cavity of the upper housing (4). The end of the hollow tube (71) away from the drive device (6) is rotatably connected to the connecting seat (72). A drain chamber (73) is connected to the surface of the hollow tube (71). The side surface of the drain chamber (73) away from the hollow tube (71) is tightly fitted to the inner surface of the inner frame (51). A plurality of vertically equidistant interactive holes (74) are opened on one side surface of the drain chamber (73). A cavity (75) communicating with the hollow tube (71) is opened on the connecting seat (72). A drain pipe (76) communicating with the cavity (75) is provided on the connecting seat (72). A backwash ball valve (77) is provided at the end of the drain pipe (76) away from the connecting seat (72).

5. A backwashing self-cleaning dual filter according to claim 4, characterized in that: The sewage discharge chamber (73) is provided with several partition plates, which can divide the sewage discharge chamber (73) into multiple flow channels, and the multiple flow channels are connected to the hollow pipe (71).

6. A backwashing self-cleaning dual filter according to claim 4, characterized in that: A reinforcing rib (10) is provided between the sewage discharge chamber (73) and the hollow pipe (71).

7. A backwashing self-cleaning dual filter according to claim 1, characterized in that: An inlet pressure sensor (11) and an outlet pressure sensor (12) are provided on the upper housing (4).

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