A duplex switching filter

Abstract

The utility model relates to filter technical field especially, more particularly to a kind of duplex switching filter.The duplex switching filter includes three-way switching valve, first feed inlet, second feed inlet and discharge port are provided on three-way switching valve, and detachable filter cartridge is installed on first feed inlet and second feed inlet;Mounting bracket group is installed on filter cartridge, and filter component is installed on mounting bracket group.The duplex switching filter provided by the utility model uses three-way switching valve to cooperate two independent filter cartridges, the cooperation of valve and three-way switching valve can realize the alternate use of two filter cartridges, when one filter cartridge is working, another filter cartridge is in standby state, when working filter cartridge needs to be cleaned, close its valve, switching three-way valve connects standby filter cartridge, can overhaul the filter cartridge blocked without stopping filling operation.

Description

Technical Field

[0001] This utility model relates to the field of filtration technology, and in particular to a dual-switching filter. Background Technology

[0002] In the filling process of chemical liquid raw materials (such as lubricating oil, additives, etc.), filtration is a key step to ensure the quality of the final product. Traditional processes usually install filtration equipment between the filling machine and the feed manifold.

[0003] Currently, the industry commonly uses single-cylinder filter structures. However, when the filter becomes clogged due to impurities and needs cleaning or replacement, the entire production line must be shut down. For continuous production aiming for high efficiency, frequent downtime for maintenance leads to a significant reduction in production efficiency. Furthermore, traditional filter structures are mostly planar or simple cylindrical, resulting in a small effective filtration area. This limits the liquid throughput per unit time and makes the overall liquid filtration efficiency prone to sharp decline due to localized clogging, increasing system pressure drop.

[0004] Therefore, it is necessary to provide a new dual-switching filter to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a dual-switching filter.

[0006] The dual-switching filter provided by this utility model includes a three-way switching valve, which is provided with a first inlet, a second inlet and a discharge port. A detachable filter cartridge is installed on both the first inlet and the second inlet. The filter cartridge has a threaded tail end. An integrally formed feed branch pipe is installed on the body of the filter cartridge near the threaded tail end. A valve is installed on the feed branch pipe. An installation frame assembly is installed on the filter cartridge, and a filter component is installed on the installation frame assembly. The filter component includes a sleeve. A spiral plate is fixedly connected to the outer wall of the sleeve. Spiral cavities are opened on the spiral plate and distributed along the plate surface. A metal spiral filter screen is fixedly installed in the threaded cavity. An installation plate is also fixedly fitted on the sleeve. A metal filter screen is fixedly installed in the through cavity opened on the installation plate.

[0007] Preferably, the end of the spiral plate is fixedly connected to the mounting plate.

[0008] Preferably, an abutment ring is fixedly installed at the end of the sleeve opposite to the mounting plate.

[0009] Preferably, the mounting bracket assembly includes a sealing column, the insertion section of which is provided with an external thread that matches the threaded tail end, the inner cylindrical surface of which is fixedly mounted with a coaxially arranged abutment column, the head of which is fixedly mounted with a coaxially arranged sleeve rod, the diameter of which is smaller than the diameter of which is fitted to the sleeve, the head of which is provided with a threaded connection part, and a threaded nut is installed on the threaded connection part.

[0010] Preferably, one end of the filter cartridge is provided with a docking port, and the docking port is fixedly connected to the first feed port or the second feed port on the three-way switching valve.

[0011] Preferably, a T-shaped pipe is installed at the valve interface on both filter cartridges.

[0012] Preferably, rubber strips are embedded on the outer ring wall of the spiral plate and the outer ring wall of the mounting plate.

[0013] Compared with related technologies, the dual-switching filter provided by this utility model has the following beneficial effects: 1. This utility model uses a three-way switching valve in conjunction with two independent filter cartridges. Through the cooperation of the valve and the three-way switching valve, the two filter cartridges can be used alternately. When one filter cartridge is working, the other filter cartridge is in standby mode. When the working filter cartridge needs to be cleaned, its valve is closed and the three-way valve is switched to connect the standby filter cartridge. The clogged filter cartridge can be repaired without stopping the filling operation. 2. In this utility model, a metal spiral filter screen is provided on the spiral plate, which increases the contact area between the liquid and the filter screen and realizes multiple filtration. Even if a part of the metal spiral filter screen is blocked, the fluid can still find the unblocked area along the spiral flow channel, which improves the stability of filtration. The metal filter screen on the mounting plate acts as a second line of defense to intercept impurities that may escape. At the same time, the load is reduced and the cleaning cycle is extended because of the front metal spiral filter screen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the dual-switching filter provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the three-way switching valve. Figure 3 for Figure 1 The diagram shows the structure of the filter cartridge. Figure 4 This is a schematic diagram of the installation structure of the filter component on the mounting frame assembly in this utility model; Figure 5 for Figure 4 The diagram shows the structure of the mounting bracket assembly. Figure 6 for Figure 4 One of the structural schematic diagrams of the filter component shown; Figure 7 for Figure 4 The second schematic diagram of the filter component shown.

[0015] The following are the labels in the diagram: 1. Three-way switching valve; 11. First feed inlet; 12. Second feed inlet; 13. Discharge outlet; 2. Filter cartridge; 21. Threaded tail end; 22. Butt joint port; 23. Feed branch pipe; 24. Valve; 3. Three-way pipe; 4. Mounting bracket assembly; 41. Sealing column; 411. External threaded part; 42. Abutting column; 421. Sleeve rod; 422. Threaded connection part; 43. Nut; 5. Filter component; 51. Sleeve; 511. Abutting ring; 52. Spiral plate; 53. Metal spiral filter screen; 54. Mounting plate; 55. Metal filter screen. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0018] Please see Figures 1 to 7 The present invention provides a dual-switch filter, which includes a three-way switching valve 1, a filter cartridge 2, a three-way pipe 3, a mounting bracket 4, and a filter component 5.

[0019] In the embodiments of this utility model, please refer to Figures 1 to 7 The three-way switching valve 1 is provided with a first feed port 11, a second feed port 12 and a discharge port 13. A detachable filter cartridge 2 is installed on both the first feed port 11 and the second feed port 12. A threaded tail port 21 is provided at the tail of the filter cartridge 2. An integrally formed feed branch pipe 23 is installed on the body of the filter cartridge 2 near the threaded tail port 21. A valve 24 is installed on the feed branch pipe 23. A three-way pipe 3 is installed at the interface of the valve 24 on the two filter cartridges 2.

[0020] This application is installed between the feed main pipe and the filling head. Specifically, the three-way pipe 3 is connected to the output end of the feed main pipe through the guide pipe, and the discharge port 13 of the three-way switching valve 1 is connected to the input end of the filling head.

[0021] It should be noted that: two sets of filter cartridges 2 are installed on the three-way switching valve 1, and the three-way switching valve 1 cooperates with the valve 24 set on the feed branch pipe 23 of each set of filter cartridges 2 to realize the opening and closing of the corresponding filter cartridges 2. This application takes the first feed port 11 as an example. The operator uses the three-way switching valve 1 to connect the first feed port 11, and then opens the valve 24 on the corresponding filter cartridge 2. At this time, the second feed port 12 is in the closed state and the valve 24 on the filter cartridge 2 on the second feed port 12 is closed at the same time. Therefore, the filter cartridges on the first feed port 11 are closed. The filter cartridge 2 is in use, while the filter cartridge 2 on the second feed inlet 12 is in standby. When the filter component 5 in the filter cartridge 2 on the first feed inlet 11 needs cleaning or maintenance, the operator closes the valve 24 in the filter cartridge 2 on the first feed inlet 11, then uses the three-way switching valve 1 to connect the second feed inlet 12, and then opens the valve 24 on the corresponding filter cartridge 2. At this time, the filter cartridge 2 on the second feed inlet 12 is in use, while the filter cartridge 2 on the first feed inlet 11 can be inspected by the operator. The entire process does not require stopping the filling operation.

[0022] Both the three-way switching valve 1 and valve 24 can be operated manually, pneumatically, or electrically. The appropriate specifications of the three-way switching valve 1 and valve 24 can be selected by the technicians according to their needs.

[0023] In this embodiment: one end of the filter cartridge 2 is provided with a docking port 22, and the docking port 22 is fixedly connected to the first feed port 11 or the second feed port 12 on the three-way switching valve 1. The docking port 22 and the first feed port 11 or the second feed port 12 can be connected by a threaded connection, that is, the docking port 22 is designed as a threaded port, and the first feed port 11 and the second feed port 12 are also designed as threaded ports that match the docking port 22, so as to achieve a threaded fixed connection between the docking port 22 on the filter cartridge 2 and the first feed port 11 or the second feed port 12 on the three-way switching valve 1. Alternatively, a flange connection can be used, that is, a flange is welded on the docking port 22, and flanges are also welded on the first feed port 11 and the second feed port 12. Then, bolts are used to fix the flanges on the docking port 22 and the first feed port 11 (or the second feed port 12), so as to achieve a fixed connection between the docking port 22 on the filter cartridge 2 and the first feed port 11 or the second feed port 12 on the three-way switching valve 1. The connection method is designed and selected by the technicians according to specific requirements.

[0024] In a specific embodiment, please refer to Figures 1 to 7The filter cartridge 2 is equipped with a mounting frame assembly 4, and the mounting frame assembly 4 is equipped with a filter component 5. The filter component 5 includes a sleeve 51, and a spiral plate 52 is fixedly connected to the outer wall of the sleeve 51. The spiral plate 52 has spiral cavities distributed along the plate surface. A metal spiral filter screen 53 is fixedly installed in the spiral cavity. A mounting plate 54 is also fixedly mounted on the sleeve 51. A metal filter screen 55 is fixedly installed in the through cavity opened on the mounting plate 54. The end of the spiral plate 52 is fixedly connected to the mounting plate 54.

[0025] In this application, the liquid flow path is as follows: it enters the feed branch pipe 23 in the working state through the three-way pipe 3, enters the corresponding filter cartridge 2 through the feed branch pipe 23, is filtered by the filter component 5 in the filter cartridge 2, and finally enters the filling head through the three-way switching valve 1.

[0026] It should be noted that: the filter element 5 is installed into the filter cartridge 2 through the mounting bracket assembly 4. Since the spiral plate 52 on the sleeve 51 is equipped with a metal spiral filter screen 53, the contact area between the liquid and the metal spiral filter screen 53 is greatly increased, allowing the metal spiral filter screen 53 to filter the liquid multiple times. When a local metal spiral filter screen 53 is blocked, the liquid can also travel along the spiral flow channel formed by the metal spiral filter screen 53 to the unblocked metal spiral filter screen 53, and then be filtered by the metal spiral filter screen 53 there, thereby greatly improving the filtration effect. Since a metal filter 55 is installed on the mounting plate 54 at the tail of the metal spiral filter 53, it serves as the last line of filtration, effectively preventing some of the liquid flowing along the spiral channel from being unfiltered. Furthermore, since the liquid is pre-filtered by the metal spiral filter 53, there are fewer impurities in the liquid that subsequently reaches the metal filter 55. As a result, the cleaning cycle of the metal filter 55 when it becomes clogged is extended, thereby reducing the number of times the staff cleans the filter component 5.

[0027] In this embodiment, the outer ring wall of the spiral plate 52 and the mounting plate 54 are matched with the inner diameter of the filter cylinder 2, so that the spiral plate 52 and the mounting plate 54 can be stably installed in the filter cylinder 2. At the same time, gaps are avoided between the outer ring wall of the spiral plate 52 and the mounting plate 54 and the inner wall of the filter cylinder 2, which would cause some liquid to flow out from the gaps and prevent the filter screen from filtering it.

[0028] In an optional configuration, rubber strips are embedded in the outer ring wall of the spiral plate 52 and the outer ring wall of the mounting plate 54. Specifically, a spiral groove is formed on the outer ring wall of the spiral plate 52 along the spiral direction, and the rubber strip is then embedded in the spiral groove. A ring groove is formed on the outer ring wall of the mounting plate 54, and the annular rubber strip is fitted into the ring groove. The added rubber strip improves the sealing effect between the outer ring wall of the spiral plate 52 and the mounting plate 54 and the inner cylinder diameter of the filter cartridge 2. Furthermore, since the rubber strip is an elastic material, it avoids a rigid connection between the outer ring wall of the spiral plate 52 and the outer ring wall of the mounting plate 54 and the inner cylinder wall of the filter cartridge 2. The embedded rubber strip can be made of wear-resistant and corrosion-resistant materials such as polytetrafluoroethylene or perfluoroether rubber, extending its service life. When the rubber strip wears out, only the sealing strip needs to be replaced, reducing maintenance costs.

[0029] In a specific embodiment, please refer to Figures 1 to 7 The mounting bracket assembly 4 includes a sealing column 41. The insertion section of the sealing column 41 is provided with an external thread 411 that matches the threaded tail end 21. A coaxially arranged abutment column 42 is fixedly installed on the inner cylindrical surface of the sealing column 41. A coaxially arranged sleeve rod 421 is fixedly installed on the head of the abutment column 42. The diameter of the sleeve rod 421 is smaller than the diameter of the abutment column 42 and is adapted to the sleeve 51. A threaded connection part 422 is provided at the head of the sleeve rod 421. A threaded nut 43 is installed on the threaded connection part 422. An abutment ring 511 is fixedly installed on the end of the sleeve 51 that is away from the mounting plate 54.

[0030] It should be noted that when installing the filter component 5 on the mounting bracket assembly 4, the end of the sleeve 51 with the abutment ring 511 should first be fitted onto the connecting rod 421, so that the abutment ring 511 abuts against the abutment post 42. Then, the nut 43 should be fitted onto the threaded connection part 422 and screwed in along the threaded connection part 422 until the nut 43 firmly abuts the sleeve 51 against the connecting rod 421 (e.g., Figure 4 (as shown); then insert the filter element 5 into the filter cartridge 2 from the threaded end 21. After the external thread 411 abuts against the threaded end 21, rotate the sealing post 41 to fix the external thread 411 and the threaded end 21 in a threaded fixation, thus completing the installation of the filter element 5 in the filter cartridge 2. During disassembly, reverse the sealing post 41 so that the external thread 411 is unscrewed along the thread tail 21. Pull the sealing post 41 outward so that the filter element 5 slides out of the filter cylinder 2. Then unscrew the nut 43 and slide the sleeve 51 outward from the connecting rod 421 to complete the disassembly of the filter element 5. Finally, the filter element 5 can be rinsed and cleaned by the staff. Since the filter element 5 can be completely removed for cleaning, the difficulty of cleaning is reduced. It can be thoroughly cleaned by simple rinsing, backwashing or soaking.

[0031] In this embodiment, the depth to which the abutment column 42 is inserted into the filter cartridge 2 exceeds the interface between the feed branch pipe 23 and the filter cartridge 2, so that the liquid can be pre-filtered by the metal spiral filter screen 53.

[0032] Therefore, this application uses a three-way switching valve 1 in conjunction with two independent filter cartridges 2. Through the cooperation of valve 24 and three-way switching valve 1, the two filter cartridges 2 can be used alternately. When one filter cartridge 2 (such as the filter cartridge 2 on the first feed port 11) is working, the other filter cartridge 2 is in standby mode. When the working filter cartridge 2 needs to be cleaned, its valve 24 is closed and the three-way valve 1 is switched to connect the standby filter cartridge 2. The clogged filter cartridge 2 can be repaired without stopping the filling operation. In this application, the spiral plate 52 is provided with a metal spiral filter screen 53, which increases the contact area between the liquid and the filter screen and realizes multiple filtration. Even if a part of the metal spiral filter screen 53 is blocked, the fluid can still find the unblocked area along the spiral flow channel, which improves the stability of filtration. The metal filter screen 55 on the mounting plate 54 serves as a second line of defense to intercept impurities that may escape. At the same time, the load is reduced and the cleaning cycle is extended because of the front-mounted metal spiral filter screen 53.

[0033] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0034] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dual-switching filter, comprising a three-way switching valve (1), wherein the three-way switching valve (1) is provided with a first inlet (11), a second inlet (12) and a discharge port (13), and a detachable filter cartridge (2) is installed on both the first inlet (11) and the second inlet (12), characterized in that: The filter cylinder (2) is provided with a threaded tail port (21) at the tail end. An integrally formed feed branch pipe (23) is installed on the body of the filter cylinder (2) near the threaded tail port (21). A valve (24) is installed on the feed branch pipe (23). An installation frame assembly (4) is installed on the filter cylinder (2), and a filter component (5) is installed on the installation frame assembly (4). The filter component (5) includes a sleeve (51). A spiral plate (52) is fixedly connected to the outer wall of the sleeve (51). A spiral cavity distributed along the plate surface is opened on the spiral plate (52). A metal spiral filter screen (53) is fixedly installed in the threaded cavity. An installation plate (54) is also fixedly installed on the sleeve (51). A metal filter screen (55) is fixedly installed in the through cavity opened on the installation plate (54).

2. The dual switch filter of claim 1, wherein, The end of the spiral plate (52) is fixedly connected to the mounting plate (54).

3. The dual switch filter of claim 1, wherein, An abutment ring (511) is fixedly installed at the end of the sleeve (51) away from the mounting plate (54).

4. The dual switch filter of claim 3, wherein, The mounting bracket assembly (4) includes a sealing column (41). The insertion section of the sealing column (41) is provided with an external thread (411) that matches the threaded tail (21). A coaxially arranged abutment column (42) is fixedly installed on the inner cylindrical surface of the sealing column (41). A coaxially arranged sleeve rod (421) is fixedly installed on the head of the abutment column (42). The diameter of the sleeve rod (421) is smaller than the diameter of the abutment column (42) and the sleeve (51) is adapted to each other. A threaded connection part (422) is provided at the head of the sleeve rod (421). A threaded nut (43) is installed on the threaded connection part (422).

5. The dual-switching filter according to claim 1, characterized in that, One end of the filter cartridge (2) is provided with a docking port (22), and the docking port (22) is fixedly connected to the first feed port (11) or the second feed port (12) on the three-way switching valve (1).

6. The dual-switching filter according to claim 1, characterized in that, A three-way pipe (3) is installed at the valve (24) interface on the two filter cartridges (2).

7. The dual-switching filter according to claim 3, characterized in that, Rubber strips are embedded on the outer ring wall of the spiral plate (52) and the outer ring wall of the mounting plate (54).

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