Backwash filter

Abstract

A backwashing filter belongs to the technical field of pipeline filters and comprises a tank body, the bottom of the tank body is communicated with a main pipe perpendicular to the tank body, and two ends of the main pipe are respectively provided with a first valve and a second valve; a rotatable filter cotton swab group is arranged in the tank body; a closed partition plate is arranged in the main pipe 2 and located on the side face of the tank body, a channel connecting the main pipe and the tank body is arranged at the position, away from the tank body, of the closed partition plate and located in the first valve or the second valve, the main pipe provided with the channel side is a first main pipe, and the main pipe communicated with the tank body side is a second main pipe. The first valve is communicated with the second valve through the first main pipe, the channel, the tank body and the second main pipe; and a backwashing pipe with a backwashing valve is arranged on the second main pipe under the tank body. According to the technical scheme different from the prior art, a rolling mechanism is arranged on a filter rod, and the backwashing filter rotates in a tank body under the action of oil flow.

Description

Technical Field

[0001] The present application belongs to the technical field of pipeline filters, and in particular relates to a backwash filter. Background Art

[0002] Filters are used in the process of purifying oil. After a period of use, certain impurities will accumulate inside the filter layer, resulting in a decrease in the filtering effect. Generally, the filter element is directly replaced, but this is more cumbersome. Backwash filters are now mostly used, which have a backwash drain valve at the bottom of the filter element. When the filtering effect of the filter element is reduced to a certain level, the electromagnetic switch will be controlled to open the drain valve for backwashing and drainage.

[0003] The technicians in this field believe that the filter element is fixed when in use, so that the contact area between the filter element and the waste oil is limited, resulting in poor utilization of the filter element. For example, the existing backwashing technology with the publication number CN110975379B has the above-mentioned drawbacks. For this reason, the technicians in this field set up a technical scheme such as the publication number CN117138433A, which has a tank body, the outer surface of the tank body near the bottom is installed with a liquid inlet pipe, the outer surface near the top is installed with a liquid outlet pipe, the bottom of the tank body is fixedly installed with a sewage pipe extending to the inside, the inner wall of the tank body near the bottom is fixedly installed with a partition, the upper surface of the partition is evenly penetrated in the circumferential direction and opened with multiple oil injection holes, the inner wall of the tank body located above the liquid outlet pipe is fixedly installed with a fixed disk, and multiple cylindrical filter elements are evenly installed in the circumferential direction between the fixed disk and the partition, the bottom of the filter element is an open structure, and the filter element is connected with the oil injection hole, the top of the filter element is fixedly installed with a rotating shaft, the top of the rotating shaft is set through the upper surface of the fixed disk, and a rotating mechanism for driving multiple filter elements to rotate is installed on the fixed disk.

[0004] However, the applicant believes that the rotating mechanism is relatively complex and easily blocked, and has relatively high requirements on the materials used to manufacture the parts. Ordinary iron parts will quickly rust and become unable to rotate. Utility Model Content

[0005] The utility model aims to solve the existing problem that the filter element is fixed when in use, so that the contact area between the filter element and the waste oil is limited, which affects the filtering effect of the waste oil. The utility model provides a technical solution different from the publication number CN117138433A, which is a backwash filter that rotates in the tank body under the action of the oil flow by installing a rolling mechanism on the filter rod.

[0006] In order to achieve the above technical purpose, the following technical solution is provided: a backwash filter, comprising a tank body, the bottom of the tank body is connected to a main pipe perpendicular to the tank body, and the two ends of the main pipe are respectively provided with a first valve and a second valve; a filter cotton stick group that can rotate is provided in the tank body;

[0007] A closed partition is provided inside the main pipe at the side of the tank body, and a passage connecting the main pipe and the tank body is provided inside the first valve or the second valve at a position where the closed partition is away from the tank body, the main pipe on the side with the passage is the first main pipe, and the main pipe connected to the tank body is the second main pipe;

[0008] The first valve and the second valve are connected by the first main pipe, the channel, the tank body and the second main pipe; a backwashing pipe with a backwashing valve is arranged on the second main pipe just below the tank body.

[0009] In an operative manner, the tank body comprises an inner layer pipe and an outer layer tank body, both ends of the inner layer pipe and the outer layer tank body are closed, wherein the inner layer pipe is connected to the second main pipe, and a filter hole is provided on the inner layer pipe which is connected to the outer layer tank body and aligned with the backwash pipe, and a channel is connected to the outer layer tank body.

[0010] In an practicable manner, a filter space is provided between the inner pipe and the outer tank body, and a plurality of filter cotton swabs are arranged in the filter space.

[0011] In an practicable manner, a rolling structure is provided at one end of the filter cotton stick, and the rolling structure enables the filter cotton stick to rotate in the filter space under the impact of the oil flow between the first valve and the second valve.

[0012] In an practicable manner, the rolling structure includes a base arranged at the end of the filter cotton stick, the base is provided with a cavity, the cavity is provided with a rolling ball and a support rod group that limits the movement of the rolling ball and is fixed to the base.

[0013] In an practicable manner, the tank body is provided with a detection member for detecting the flow rate in the first main pipe and the flow rate in the second main pipe; and an electric control unit for controlling the backwashing valve.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] There is no need to design a complex mechanical structure, which reduces costs and is simple in structure and easy to replace. Moreover, under the impact of the oil flow, the filter cotton swab will rotate to absorb impurities in the oil flow, and the filter cotton swab group will rotate in the filter space to absorb impurities in the oil flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 1 tank body, 2 main pipe, 3 closed baffle, 4 channel, 5 backwash pipe, 6 filter cotton swab, 7 rolling structure,

[0017] 11 inner pipe, 12 outer tank, 21 first valve, 22 second valve, 23 first main pipe, 24 second main pipe, 51 backwash valve, 71 base, 72 chamber, 73 rolling ball, 74 support rod group,

[0018] Figure 1 It is a schematic diagram of the overall structure of the embodiment;

[0019] Figure 2 It is a front view of the second valve;

[0020] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0021] Figure 4 It is a schematic diagram of the overall structure of the filter cotton swab group;

[0022] Figure 5 It is a schematic diagram of the overall structure of the filter cotton swab;

[0023] Figure 6 is a front view of the rolling structure;

[0024] Figure 7 for Figure 6 Partial cross-sectional view at the middle BB; DETAILED DESCRIPTION

[0025] like Figures 1 to 7 The embodiment shown is a backwash filter, comprising a tank body 1, the bottom of which is connected to a main pipe 2 perpendicular to the tank body 1, and a first valve 21 and a second valve 22 are respectively provided at both ends of the main pipe 2; a rotatable filter cotton swab group is provided in the tank body 1; and a closed partition 3 is provided in the main pipe 2 at a side position of the tank body 1, and a channel 4 connecting the main pipe 2 and the tank body 1 is provided at a position of the closed partition 3 away from the tank body 1 and located in the first valve 21 or the second valve 22.

[0026] In this embodiment, the main pipe 2 on the channel 4 side is preferably a first main pipe 23 connected to the first valve 21; the main pipe 2 on the tank body 1 side is a second main pipe 24 connected to the second valve 22; and a detection component for detecting the flow in the first main pipe 23 and the flow in the second main pipe 24 is also provided on the tank body 1.

[0027] The first valve 21 and the second valve 22 are connected by the first main pipe 23, the channel 4, the tank body 1 and the second main pipe 24; a backwash pipe 5 with a backwash valve 51 is provided on the second main pipe 24 directly below the tank body 1, and an electric control unit for controlling the backwash valve 51 is provided.

[0028] In this embodiment, the tank body 1 includes an inner layer pipe 11 and an outer layer tank body 12, both ends of the inner layer pipe 11 and the outer layer tank body 12 are closed, wherein the inner layer pipe 11 is connected to the second main pipe 24, and the inner layer pipe 11 is provided with a filter hole connected to the outer layer tank body 12 and aligned with the backwash pipe 5, and the outer layer tank body 12 is connected to the channel 4. There is a filter space between the inner layer pipe 11 and the outer layer tank body 12, and a plurality of filter cotton sticks 6 are arranged in the filter space; the plurality of filter cotton sticks 6 constitute a filter cotton stick group that can rotate in the tank body 1.

[0029] Among them, a rolling structure 7 is arranged at one end of the filter cotton stick 6, and the rolling structure 7 enables the filter cotton stick 6 to rotate in the filter space under the impact of the oil flow between the first valve 21 and the second valve 22. The rolling structure 7 includes a base 71 arranged at the end of the filter cotton stick 6, and a cavity 72 is arranged on the base 71. A rolling ball 73 and a support rod group 74 that limits the movement of the rolling ball 73 and is fixed on the base 71 are arranged in the cavity 72. In this embodiment, the tank body 1 is arranged vertically, with an opening and closing door on the top, and the bottom of the tank body 1 is at the bottom, so in this embodiment, the rolling structure 7 of the filter cotton stick 6 is at the bottom, that is, it is located on the lower end closed surface of the inner pipe 11 and the outer tank body 12.

[0030] In this embodiment, the dirty oil enters the first main pipe 23 through the first valve 21, and the dirty oil in the first main pipe 23 is blocked by the closed partition 3 so that the dirty oil enters the channel 4. The dirty oil in the channel 4 enters the tank body 1, that is, enters the filter space between the inner layer pipe 11 and the outer layer tank body 12. The dirty oil in the filter space will enter the inner layer pipe 11 through the filter hole, and then enter the second main pipe 24 and flow out through the second valve 22. In this process, the dirty oil flowing out of the channel 4 will impact the filter cotton stick 6 to make it rotate, and also make the entire filter cotton stick group rotate in the filter space.

[0031] When the filter swab 6 in the filter space is squeezed to one side by the dirty oil and cannot rotate, this state is obtained by detecting relevant data of the detection part. Under special conditions, it is replaced by opening and closing the door. Under normal circumstances, backwashing is performed. The personnel close the second valve 22, and then the electric control unit controls the backwashing valve 51 to open, and the inner layer pipeline 11 is impacted by high-pressure and high-speed oil flow to punch through the filter hole and make the filter swab 6 move. The backwashed dirty oil enters the collection pipe through the first main pipe 23 through the first valve 21. Because in this embodiment, a three-way pipe is connected to the outside of the first valve 21, and the other two ports of the pipeline are connected to the collection pipe, and an oil inlet valve is set to connect to the dirty oil inlet pipe. During the backwashing process, the oil inlet valve is also in a closed state.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0033] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "flat", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this specification, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0036] In this specification, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A backwash filter, comprising a tank (1), characterized in that: The bottom of the tank body (1) is connected to a main pipe (2) perpendicular thereto, and the two ends of the main pipe (2) are respectively provided with a first valve (21) and a second valve (22); a rotatable filter cotton stick group is provided in the tank body (1); A closed partition (3) is arranged inside the main pipe (2) at a side position of the tank body (1); a channel (4) connecting the main pipe (2) and the tank body (1) is arranged inside the closed partition (3) away from the tank body (1) and located inside the first valve (21) or the second valve (22); the main pipe (2) on the side where the channel (4) is arranged is a first main pipe (23), and the main pipe (2) on the side connected to the tank body (1) is a second main pipe (24); The first valve (21) and the second valve (22) are connected via the first main pipe (23), the channel (4), the tank (1) and the second main pipe (24); A backwashing pipe (5) with a backwashing valve (51) is provided on the second main pipe (24) directly below the tank body (1).

2. The backwash filter according to claim 1, characterized in that: The tank body (1) comprises an inner layer pipe (11) and an outer layer tank body (12), both ends of the inner layer pipe (11) and the outer layer tank body (12) are closed, wherein the inner layer pipe (11) is connected to the second main pipe (24), and a filter hole is provided on the inner layer pipe (11) which is connected to the outer layer tank body (12) and aligned with the backwash pipe (5), and the outer layer tank body (12) is connected to the channel (4).

3. The backwash filter according to claim 2, characterized in that: A filtering space is provided between the inner layer pipe (11) and the outer layer tank body (12), and a plurality of filter cotton sticks (6) are arranged in the filtering space.

4. The backwash filter according to claim 3, characterized in that: A rolling structure (7) is provided at one end of the filter cotton stick (6), and the rolling structure (7) enables the filter cotton stick (6) to rotate in the filter space under the impact of oil between the first valve (21) and the second valve (22).

5. The backwash filter according to claim 4, characterized in that: The rolling structure (7) comprises a base (71) arranged at the end of the filter cotton stick (6), the base (71) being provided with a cavity (72), the cavity (72) containing a rolling ball (73) and a support rod group (74) fixed to the base (71) for limiting the movement of the rolling ball (73).

6. The backwash filter according to claim 1, characterized in that: The tank body (1) is provided with a detection element for detecting the flow rate in the first main pipe (23) and the flow rate in the second main pipe (24); and an electric control unit for controlling the backwash valve (51).

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