Bidirectional filter

Abstract

A bidirectional filter belongs to the technical field of filtration and is characterized in that bypass valves are arranged at two ends of a cylindrical filter element, and when the bypass valve at one end is opened, the bypass valve at the other end is closed, so that fluid bypasses the bypass valves from one end to the outside of the filter element, is filtered by the filter element and then passes through the bypass valve at the other end to be output; therefore, bidirectional filtration of fluid through the same pipeline can be realized, and decontamination of the filter is realized through backwashing. The bidirectional filter is novel in conception, ingenious in design and convenient to operate, bidirectional filtering of the same pipeline is achieved, and sewage can be conveniently cleaned and discharged.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtration, and specifically relates to a filtration device capable of realizing two-way filtration. Background Art

[0002] A filter is an indispensable device applied to a pipeline for conveying a medium, usually installed at the inlet end of various valves, detection instruments and other equipment to clean the pollutants and impurities in the fluid of the medium conveyed in the pipeline. At present, the general filter usually has only a single-way filtration function and cannot meet the special requirement of two-way filtration in the same pipeline. If two-way filtration is to be realized, additional pipelines and filters need to be added, resulting in limited equipment space and increased manufacturing costs.

[0003] The existing patent CN20629048U discloses a through-type two-way filter. By setting bypass valves at both ends of a cylindrical filter element, when one bypass valve is opened and the other bypass valve is closed, the fluid bypasses the bypass valve from one end to reach the outside of the filter element, passes through the filter element for filtration, and then outputs through the bypass valve at the other end. By swapping the states of the bypass valves at both ends, two-way filtration of the fluid through the same pipeline can be realized. However, this solution still has deficiencies. The pollutants and impurities filtered out by the fluid will always accumulate in the narrow space outside the filter element. When used for a long time, both the filtration effect and the flow-through effect will be greatly reduced. At the same time, compared with a single-way filter, this structure is relatively complex, which makes the time cost of cleaning and maintenance significantly increased when cleaning the dirt by means of disassembly and replacement. Moreover, a relatively large number of disassembly times will inevitably increase the risk of poor sealing of the device. In addition, some commonly used filters at present are made of steel and are prone to rusting after long-term use, which also affects the filtration effect. Summary of the Utility Model

[0004] In order to solve the deficiencies of the prior art, the utility model provides a two-way filter, which can effectively realize two-way filtration of the same pipeline and also facilitate cleaning and sewage discharge.

[0005] The technical problems to be solved by the utility model are realized through the following technical solutions:

[0006] A two-way filter includes a cylindrical shell, with connecting end caps provided at both ends of the shell. A cylindrical filter element is provided inside the shell, and inner end caps are provided at both ends of the filter element. Bypass valves are provided at the centers of the inner end caps, and the two bypass valves are arranged facing each other. In the present invention, an installation seat is provided at the outer edge of the inner end cap. The installation seat is integrally annular and is firmly arranged on the inner wall of the shell. Radially opened liquid inlet channels are evenly distributed on the installation seat. A support spring is provided between the two installation seats. The support spring is sleeved outside the filter element, and annular isolation rings are provided at both ends of the support spring. A conical closing cone is provided on the side of the isolation ring facing the installation seat. The closing cone corresponds to the openings of the liquid inlet channels of the installation seat one by one, and the closing cone is in sealing cooperation with the liquid inlet channels. The shell is provided with a sewage outlet, and a sewage control valve is provided on the sewage outlet.

[0007] In the present invention, the position where the installation seat is connected to the inner end cap is set in a stepped shape, which is convenient for the installation and fixation of the inner end cap and the filter element.

[0008] Furthermore, the installation seat includes an outer connecting ring and an inner splicing block. The adjacent splicing blocks form the liquid inlet channels, and the outer sides of the splicing blocks are fixed on the connecting ring.

[0009] Furthermore, the connecting ring of the installation seat is connected to the inner side of the shell by threads.

[0010] In the present invention, the shell, the connecting end cap, and the inner end cap are all injection-molded from engineering plastics at one time. The isolation ring is a magnetic metal ring. An adjusting ring is sleeved outside the shell. The adjusting ring is in a ring shape or a C shape constructed by a permanent magnet or an electromagnet, and the inner side of the adjusting ring adsorbs the isolation ring through the shell.

[0011] In the present invention, a rigid connecting rod is connected between the two bypass valves. The connecting rod is located at the center inside the filter element, and the connecting rod keeps the distance between the valve cores of the two bypass valves unchanged.

[0012] In the present invention, the connecting end cap and the two ends of the shell are connected by threads, and a sealing ring is provided at the connection.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] In this application, by hydraulically pushing the isolation rings and bypass valves on both sides, a liquid flow channel can be constructed, and all the liquid flows from the outside of the filter element into the filter element for filtration and then flows out through the bypass valve, realizing two-way filtration in the same pipeline.

[0015] In this application, a support spring is sleeved outside the filter element, which can adsorb the pollutant impurities remaining outside the filter element to a certain extent. The movement of the support spring can also scrape off the pollutant impurities remaining on the outer wall of the filter element, facilitating cleaning.

[0016] Based on the principle of magnetic adsorption, by moving the position of the adjusting ring, the position of the isolation ring inside the housing can be adjusted, thereby shaking the supporting spring to shake off the pollutants, which is convenient for cleaning;

[0017] This application uses a rigid connecting rod to support the spool of the bypass valve, which can keep the two bypass valves in a state of one side open and the other side closed, facilitating the smooth flow of the liquid flow direction when the filter is closed.

[0018] Therefore, the utility model has novel concept, ingenious design and convenient operation, realizes bidirectional filtration of the same pipeline, and can also conveniently clean and discharge pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the utility model;

[0020] Figure 2 is Figure 1 the right view of the mounting seat (left) in

[0021] Figure 3 is Figure 1 the left view of the isolation ring (left) in

[0022] Figure 4 is Figure 1 the side view of the adjusting ring in

[0023] Figure 5 is the filtering and flow principle diagram of the utility model;

[0024] Figure 6 is the backwashing and pollution cleaning principle diagram of the utility model.

[0025] In the figure: connecting end cover 1, housing 2, sealing ring 3, inner end cover 4, bypass valve 5, mounting seat 6, isolation ring 7, supporting spring 8, filter element 9, connecting rod 10, sewage outlet 11, sewage control valve 12, adjusting ring 13, liquid inlet channel 14, closing cone 15. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following further describes the present utility model in conjunction with the accompanying drawings of the specification and specific preferred embodiments, but does not limit the protection scope of the present utility model thereby.

[0027] A two-way filter, as Figure 1As shown in the figure, it includes a cylindrical shell 2. Connecting end caps 1 are respectively arranged at both ends of the shell 2. The connecting end caps 1 and the two ends of the shell 2 are connected by threads, and a sealing ring 3 is provided at the connection. A cylindrical filter element 9 is arranged inside the shell 2. Inner end caps 4 are respectively arranged at both ends of the filter element 9. Bypass valves 5 are arranged at the centers of the inner end caps 4. The two bypass valves 5 face each other. A sewage outlet 11 is arranged on the side wall of the shell 2, and a sewage control valve 12 is arranged on the sewage outlet 11. The sewage control valve 12 is normally closed.

[0028] The bypass valve 5 includes a valve body, a valve core and a spring. The valve body is integrally arranged with the inner end cap 4. A stepped hole is left at the center of the inner end cap 4. The valve core passes through the center of the inner end cap 4. One end of it is enlarged, and the end diameter is larger than the inner diameter of the stepped hole. The other end of the valve core passes through the through hole at the center of the stepped hole. The spring is sleeved outside the valve core, with one end fixed to the enlarged end of the valve core and the other end connected inside the stepped hole. A rigid connecting rod 10 is connected between the two valve cores. The connecting rod 10 is located at the center inside the filter element 9, and the connecting rod 10 keeps the distance between the valve cores of the two bypass valves 5 unchanged.

[0029] An installation seat 6 is arranged at the outer edge of the inner end cap 4. The installation seat 6 is integrally annular. As Figure 1 and Figure 2 shown, the installation seat 6 includes a connecting ring on the outside and splicing blocks on the inside. The adjacent splicing blocks spell out a liquid inlet channel 14. The liquid inlet channels 14 are radially distributed. The outside of the splicing blocks is fixed to the connecting ring. The connecting ring of the installation seat 6 is connected to the inner wall of the shell 2 by threads. The position where the installation seat 6 is connected to the inner end cap 4 is arranged in a stepped shape.

[0030] A support spring 8 is arranged between the two installation seats 6. The support spring 8 is sleeved outside the filter element 9. Ring-shaped isolation rings 7 are respectively arranged at both ends of the support spring 8. As Figure 1 and Figure 3 shown, a conical closing cone 15 is arranged on the side of the isolation ring 7 facing the installation seat 6. The closing cones 15 correspond to the openings of the liquid inlet channels 14 of the installation seat 6 one by one, and the closing cones 15 are in sealing cooperation with the liquid inlet channels 14.

[0031] In this embodiment, the shell 2, the connecting end cap 1, and the inner end cap 4 are all injection-molded from engineering plastics at one time. The isolation ring 7 is a magnetic metal ring. An adjusting ring 13 is sleeved outside the shell 2. In Figure 4 it, the adjusting ring 13 is of a C-shaped structure made of a permanent magnet or an electromagnet. The inner side of the adjusting ring 13 adsorbs the isolation ring 7 through the shell 2.

[0032] The utility model is applied to the filtration of fluids. In actual filtration, as Figure 5As shown, when the fluid flows through the filter from left to right, the fluid enters the filter through the connecting end cover 1 on the left. Under the push of the fluid pressure, the filter element 9 of the left bypass valve 5 is pushed to the right to close the left bypass valve 5. The fluid passes through the liquid inlet channel 14 of the left mounting seat 6, pushing the left isolation ring 7 to move to the right, forming a flow path around the left inner end cover 4. After the fluid reaches the outside of the filter element 9, it pushes the right isolation ring 7 to move to the right, and the sealing cone 15 of the isolation ring 7 blocks the liquid inlet channel 14 of the right mounting seat 6, so that the fluid can only pass through the filter element 9 and flow towards the middle of the filter element 9. When the fluid reaches the inside of the filter element 9, at this time, under the push of the connecting rod 10, the valve core of the right bypass valve 5 moves to the right, making the right bypass valve 5 in a passage state. The fluid passes through the right bypass valve 5 from the inside of the filter element 9 and further passes through the right connecting end cover 1, that is, the flow-through filtration from left to right is completed; if the fluid needs to flow through the filter from right to left, the above process is the same as a mirror image; after filtering for a period of time, a certain amount of pollutant impurities have accumulated outside the filter element 9 and need to be cleaned, such as Figure 6 As shown, the left side of the filter is closed. At this time, the left bypass valve 5 is closed and the right bypass valve 5 is opened. The cleaning liquid enters the filter from the right connecting end cover 1, passes through the right bypass valve 5 and enters the filter element 9, and passes through and cleans the filter element 9 from the inside to the outside. When it reaches the outside of the filter element 9, the moving adjustment ring 13 adsorbs one or both sides of the isolation ring 7 and shakes left and right, making the support spring 8 move, disturbing the pollutant impurities on the support spring 8 and the outer wall of the filter element 9 to enter the cleaning liquid. Then, the sewage discharge control valve 12 is opened, so that the cleaning liquid mixed with pollutant impurities is discharged from the filter through the sewage discharge port 11, completing the backwashing of the filter.

[0033] Combining the above structure and working process, it can be found that the two-way filter described in this application has a simple structure, ingenious design, and convenient operation, realizing two-way filtration of the same pipeline and facilitating cleaning and sewage discharge.

Claims

1. A two-way filter, comprising a cylindrical housing, connection end caps are respectively arranged at both ends of the housing, a cylindrical filter element is arranged inside the housing, inner end caps are respectively arranged at both ends of the filter element, bypass valves are arranged at the centers of the inner end caps, and the two bypass valves are arranged facing each other, and it is characterized in that: An installation seat is provided at the outer edge of the inner end cover. The installation seat is integrally annular and is firmly arranged on the inner wall of the housing. Radially opened liquid inlet channels are evenly distributed on the installation seat. A support spring is arranged between two installation seats. The support spring is sleeved outside the filter element. Ring-shaped isolation rings are respectively arranged at both ends of the support spring. A conical closing cone is arranged on the side of the isolation ring facing the installation seat. The closing cone corresponds to the opening of the liquid inlet channel of the installation seat one by one. The closing cone is in sealing fit with the liquid inlet channel. The housing is provided with a sewage outlet, and a sewage control valve is arranged on the sewage outlet.

2. The filter according to claim 1, wherein: The position where the installation seat is connected to the inner end cover is arranged in a stepped shape.

3. The filter according to claim 2, characterized in that: The installation seat includes an outer connecting ring and an inner splicing block. Adjacent splicing blocks form the liquid inlet channel, and the outside of the splicing block is fixed on the connecting ring.

4. The filter according to claim 3, wherein: The connecting ring of the installation seat is connected to the inner side of the housing by threads.

5. The filter according to claim 1, wherein: The housing, the connecting end cover, and the inner end cover are all completed by one-time injection molding of engineering plastics. The isolation ring is a magnetic metal ring. An adjusting ring is sleeved outside the housing. The adjusting ring is in a ring shape or a C shape constructed by a permanent magnet or an electromagnet. The inner side of the adjusting ring adsorbs the isolation ring through the housing.

6. The filter according to claim 1, wherein: A rigid connecting rod is connected between the two bypass valves. The connecting rod is located at the center inside the filter element, and the connecting rod keeps the distance between the valve cores of the two bypass valves unchanged.

7. The filter according to claim 1, characterized in that: The connecting end cover and both ends of the housing are connected by threads, and a sealing ring is provided at the connection.

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