Multi-stage composite filter element

Abstract

The utility model relates to the technical field of composite filter elements, and discloses a multi-stage composite filter element which comprises an outer cylinder body, an end cover I is fixedly connected to the inner wall of the outer cylinder body, an end cover II is arranged in the outer cylinder body, a first-stage filter cartridge and a second-stage filter cartridge are respectively arranged between the end cover I and the end cover II, and the first-stage filter cartridge and the second-stage filter cartridge are arranged in the outer cylinder body. A sealing cover is arranged on one side of the outer barrel, a connecting column is fixedly connected to the sealing cover, a ball is movably connected to the tail end of the connecting column, a first annular groove and a second annular groove are formed in the opposite faces of the first end cover and the second end cover correspondingly, and annular sealing gaskets are fixedly connected to the interiors of the first annular groove and the second annular groove correspondingly; according to the utility model, the problem that the maintenance cost is increased due to the fact that a single filter cartridge is difficult to replace is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of composite filter elements, in particular to a multi-stage composite filter element. Background Art

[0002] A composite filter element is a filter element that combines one or several independent functions scientifically on one filter element according to needs to play their roles simultaneously. Different filtering functions can complement each other, making it applicable to a wider range of environments, especially suitable for liquids with complex water quality environments.

[0003] A multi-stage composite filter element is disclosed in the Chinese utility model patent with the announcement number CN216170388U. The device is composed of the upper end cover, the lower end cover, the channel, the primary filter cartridge, the secondary filter cartridge, the threaded connection sleeve and other components to form a secondary filter element, which can effectively improve the filtering effect, and can be installed by threading with the air inlet through the threaded connection sleeve, which is simple and convenient. With respect to the above-mentioned related technologies, the inventor believes that there are the following defects:

[0004] In actual use of the device, if the filter cartridge needs to be replaced, the entire filter element needs to be disassembled and replaced. Since it is difficult to replace a single filter cartridge, the maintenance cost is increased. For this reason, we provide a multi-stage composite filter element. Utility Model Content

[0005] In order to solve the problem in the above background technology that it is difficult to replace a single filter cartridge, which increases the maintenance cost, the utility model provides a multi-stage composite filter element.

[0006] The utility model adopts the following technical scheme to achieve: a multi-stage composite filter element, comprising:

[0007] An outer cylinder body, an end cover 1 is fixedly connected to the inner wall of the outer cylinder body, an end cover 2 is arranged inside the outer cylinder body, a primary filter cartridge and a secondary filter cartridge are respectively arranged between the end cover 1 and the end cover 2, a sealing cover is arranged on one side of the outer cylinder body, a connecting column is fixedly connected to the sealing cover, and a ball is movably connected to the end of the connecting column.

[0008] As a further improvement of the above solution, the opposite surfaces of the end cover 1 and the end cover 2 are respectively provided with an annular groove 1 and annular groove 2, and annular sealing gaskets are fixedly connected inside the annular groove 1 and the annular groove 2.

[0009] As a further improvement of the above solution, one end of the outer cylinder is fixedly connected to a water inlet pipe and a water outlet pipe, and a through hole corresponding to the diameter of the water inlet pipe is opened at a position of the end cover corresponding to the water inlet pipe.

[0010] As a further improvement of the above solution, the secondary filter cartridge is arranged outside the primary filter cartridge.

[0011] As a further improvement of the above solution, the thickness of the primary filter cartridge is consistent with the width of the first annular groove, and the thickness of the secondary filter cartridge is consistent with the width of the second annular groove.

[0012] As a further improvement of the above solution, the inner side surface of the sealing cover is provided with an internal thread, and the outer side of one side of the outer cylinder is provided with an external thread, and the sealing cover and the outer cylinder are threadedly connected.

[0013] As a further improvement of the above solution, the length of the primary filter cartridge is consistent with the length of the secondary filter cartridge.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model uses a threaded connection between the sealing cover and the outer cylinder to open the outer cylinder, remove the second end cover, and directly take out the primary filter cartridge or the secondary filter cartridge, so that the individual filter cartridge can be quickly disassembled and replaced. The operation is simple, convenient and fast, and effectively avoids the problem of increased maintenance costs due to the difficulty in replacing a single filter cartridge.

[0016] 2. After the replacement is completed and the sealing cover is tightened, the ball movably connected to the connecting column will continuously squeeze the end cover 2. When the end cover 2 is squeezed, the annular groove 1 and the sealing gasket inside the annular groove 2 will also be squeezed, thereby improving the sealing performance of the filter element and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the sealing cover of the utility model;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the end cover of the utility model.

[0020] Description of main symbols:

[0021] 1. Outer cylinder; 2. End cover 1; 3. End cover 2; 4. Primary filter cartridge; 5. Secondary filter cartridge; 6. Sealing cover; 7. Connecting column; 8. Ball bearing; 9. Annular groove 1; 10. Annular groove 2; 11. Sealing gasket; 12. Water inlet pipe; 13. Internal thread. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. Example

[0023] Please combine Figure 1-3 , a multi-stage composite filter element of this embodiment includes:

[0024] The outer cylinder 1 has an end cap 2 fixedly connected to its inner wall, an end cap 2 3 arranged inside the outer cylinder 1, a primary filter cartridge 4 and a secondary filter cartridge 5 arranged between the end cap 2 and the end cap 2 3 respectively, a sealing cover 6 arranged on one side of the outer cylinder 1, a connecting column 7 fixedly connected to the sealing cover 6, a ball 8 movably connected to the end of the connecting column 7, an inlet pipe 12 and an outlet pipe fixedly connected to one end of the outer cylinder 1 respectively, a through hole having the same diameter as the inlet pipe 12 is provided at the position of the end cap 2 corresponding to the inlet pipe 12, so that unfiltered water can flow into the filter element and filtered water can be discharged from the outer cylinder 1, the secondary filter cartridge 5 is arranged on the outside of the primary filter cartridge 4, and can filter the water layer by layer, thereby improving the filtering effect on the water body, an internal thread 13 is arranged on the inner side surface of the sealing cover 6, an external thread is arranged on the outside of one side of the outer cylinder 1, and the sealing cover 6 is threadedly connected to the outer cylinder 1, which is not only convenient for disassembly, but also can ensure the sealing of the outer cylinder 1 during connection.

[0025] The opposite surfaces of the end cover 2 and the end cover 3 are respectively provided with an annular groove 19 and an annular groove 2 10, and the insides of the annular groove 19 and the annular groove 2 10 are fixedly connected with an annular sealing gasket 11, which can increase the sealing performance of the filter element. The thickness of the primary filter cartridge 4 is consistent with the width of the annular groove 19, and the thickness of the secondary filter cartridge 5 is consistent with the width of the annular groove 2 10, so that the two ends of the primary filter cartridge 4 and the secondary filter cartridge 5 can be smoothly inserted into the annular groove 19 and the annular groove 2 10.

[0026] The implementation principle of a multi-stage composite filter element in the embodiment of the present application is as follows: when the filter cartridge needs to be replaced, the sealing cover 6 is loosened, and the outer cylinder body 1 can be opened through the threaded connection between the sealing cover 6 and the outer cylinder body 1. By removing the end cover 2 3 and directly taking out the primary filter cartridge 4 or the secondary filter cartridge 5, the single filter cartridge can be quickly disassembled and replaced. After the replacement is completed, the sealing cover 6 is tightened again, and the ball 8 movably connected to the connecting column 7 during the tightening process will continuously squeeze the end cover 2 3. When the end cover 2 3 is squeezed, the sealing gasket 11 inside the annular groove 1 9 and the annular groove 2 10 will also be squeezed, thereby improving the sealing performance of the filter element and having strong practicality. The unfiltered water will flow into the filter element through the water inlet pipe 12, and will be discharged through the water outlet pipe after being filtered by the primary filter cartridge 4 and the secondary filter cartridge 5. Example

[0027] The present embodiment is further improved on the basis of the embodiment 1 in that the length of the primary filter cartridge 4 is consistent with the length of the secondary filter cartridge 5 .

[0028] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A multi-stage composite filter element, characterized in that: include: An outer cylinder (1), an end cover 1 (2) is fixedly connected to the inner wall of the outer cylinder (1), an end cover 2 (3) is arranged inside the outer cylinder (1), a primary filter cartridge (4) and a secondary filter cartridge (5) are arranged between the end cover 1 (2) and the end cover 2 (3), a sealing cover (6) is arranged on one side of the outer cylinder (1), a connecting column (7) is fixedly connected to the sealing cover (6), and a ball (8) is movably connected to the end of the connecting column (7).

2. A multi-stage composite filter element as claimed in claim 1, characterized in that: The opposing surfaces of the end cover 1 (2) and the end cover 2 (3) are respectively provided with an annular groove 1 (9) and an annular groove 2 (10), and an annular sealing gasket (11) is fixedly connected inside the annular groove 1 (9) and the annular groove 2 (10).

3. A multi-stage composite filter element as claimed in claim 1, characterized in that: One end of the outer cylinder (1) is fixedly connected to a water inlet pipe (12) and a water outlet pipe, respectively, and a through hole having a diameter consistent with that of the water inlet pipe (12) is provided at a position of the end cover (2) corresponding to the water inlet pipe (12).

4. A multi-stage composite filter element as claimed in claim 1, characterized in that: The secondary filter cartridge (5) is arranged outside the primary filter cartridge (4).

5. A multi-stage composite filter element as claimed in claim 1, characterized in that: The thickness of the primary filter cartridge (4) is consistent with the width of the annular groove one (9), and the thickness of the secondary filter cartridge (5) is consistent with the width of the annular groove two (10).

6. A multi-stage composite filter element as claimed in claim 1, characterized in that: An internal thread (13) is provided on the inner side surface of the sealing cover (6), and an external thread is provided on one side of the outer cylinder (1); the sealing cover (6) and the outer cylinder (1) are threadedly connected.

7. A multi-stage composite filter element as claimed in claim 1, characterized in that: The length of the primary filter cartridge (4) is consistent with the length of the secondary filter cartridge (5).

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