Straight-through type pre-filter

Abstract

The utility model relates to a straight-through type pre-filter which comprises a filter body, a water inlet end arranged on the filter body, a water outlet end arranged on the filter body and a pollution discharge part arranged on the filter body, a water inlet is formed in the water inlet end, a water outlet is formed in the water outlet end, and the water inlet end and the water outlet end are located on the two sides of the filter body. The pollution discharge part is positioned at the bottom of the filter body; the water inlet end is provided with a first connecting pipe, the first connecting pipe is in threaded connection with a first fixing part, the end, close to the water inlet end, of the first connecting pipe is provided with a first sealing protrusion, the first fixing part is provided with a first containing cavity for containing the first connecting pipe and the water inlet end, and the first fixing part is provided with a first limiting protrusion. The first limiting protrusion is located on the side wall of the first containing cavity and located at the end, away from the water inlet end, of the first containing cavity. The pre-filter has the effect of improving the sealing performance of the pre-filter, and water is prevented from leaking from the joint of the filter body and the water pipe.

Description

Technical Field

[0001] This application relates to the field of filters, and particularly to a direct-through type pre-filter. Background Art

[0002] A pre-filter is the first stage of rough filtration equipment for the whole-house water supply, used to filter out large particulate impurities, rust, sediment, insect eggs and other harmful substances in water. It is a primary pre-processor that can protect water-related equipment in a household or building. Generally installed at the front end of the pipeline, it can play a good role in protecting water-related equipment such as downstream pipelines, water purifiers, water heaters, washing machines, faucets, and shower heads.

[0003] During installation, the water inlet and outlet of the pre-filter are connected to the water pipe through internal thread straight-through joints, so that the subsequent indoor water use is filtered. Due to the existence of water pressure and the general sealing performance at the connection between the filter and the water pipe, after a period of use, leakage may occur at the connection between the pre-filter and the water pipe. Therefore, regular maintenance is required, and there is room for improvement. Utility Model Content

[0004] In order to improve the sealing performance of the pre-filter, this application provides a direct-through type pre-filter.

[0005] A direct-through type pre-filter provided by this application adopts the following technical solutions:

[0006] A direct-through type pre-filter includes a filter body, a water inlet end provided on the filter body, a water outlet end provided on the filter body, and a sewage discharge member provided on the filter body. The water inlet end is provided with a water inlet, the water outlet end is provided with a water outlet, the water inlet end and the water outlet end are located on both sides of the filter body, and the sewage discharge member is located at the bottom of the filter body; a first connecting pipe is provided on the water inlet end, a first fixing member is threadedly connected to the first connecting pipe, a first sealing protrusion is provided at one end of the first connecting pipe close to the water inlet end, a first accommodating cavity for accommodating the first connecting pipe and the water inlet end is provided on the first fixing member, a first limiting protrusion is provided on the first fixing member, the first limiting protrusion is located on the side wall of the first accommodating cavity, and the first limiting protrusion is located at one end of the first accommodating cavity away from the water inlet end; a second connecting pipe is provided on the water outlet end, a second fixing member is threadedly connected to the second connecting pipe, a second sealing protrusion is provided at one end of the second connecting pipe close to the water outlet end, a second accommodating cavity for accommodating the second connecting pipe and the water outlet end is provided on the second fixing member, a second limiting protrusion is provided on the second fixing member, the second limiting protrusion is located on the side wall of the second accommodating cavity, and the second limiting protrusion is located at one end of the second accommodating cavity away from the water outlet end.

[0007] By adopting the above technical solution, the first fixing member is threadedly connected to the water inlet end, and the second fixing member is threadedly connected to the water outlet end. The connection tightness at the joint between the water inlet end and the first fixing member and at the joint between the water outlet end and the second fixing member is improved by means of threaded connection, thereby increasing the sealing performance. Moreover, the first connecting pipe and the first fixing member enclose the joint through the cooperation of the first sealing protrusion and the first limiting protrusion, and the second connecting pipe and the second fixing member enclose the joint through the cooperation of the second sealing protrusion and the second limiting protrusion, further increasing the sealing performance at the joints between the first connecting pipe and the first fixing member and between the second connecting pipe and the second fixing member, making the sealing performance of the two connection points between the first fixing member and the second fixing member good and preventing water leakage. During installation, only the ends of the first connecting pipe and the second connecting part need to be connected to the water pipe, and the straight-through type pre-filter improves the sealing performance of the pre-filter.

[0008] Optionally, mounting threads are provided on the outer walls of both the water inlet end and the water outlet end, and the first fixing member and the second fixing member are fixed to the filter body through the mounting threads.

[0009] By adopting the above technical solution, the provision of the mounting threads facilitates the installation of the first fixing member and the second fixing member.

[0010] Optionally, a first sealing ring is provided on the first fixing member. The first sealing ring is located in the first accommodating cavity and is between the first sealing protrusion and the end of the water inlet end.

[0011] By adopting the above technical solution, the provision of the first sealing ring improves the sealing performance at the joint between the first connecting pipe and the first fixing member and prevents water leakage.

[0012] Optionally, a second sealing ring is provided on the second fixing member. The second sealing ring is located in the second accommodating cavity and is between the end of the water outlet end and the second sealing protrusion.

[0013] By adopting the above technical solution, the provision of the second sealing ring improves the sealing performance at the joint between the second connecting pipe and the second fixing member and prevents water leakage.

[0014] Optionally, the filter body includes a main cylinder, a mounting cover provided on the main cylinder, and a filter element provided in the main cylinder. A filtering cavity is provided on the main cylinder, the filter element is installed in the filtering cavity, a first filtering area is provided between the outer wall of the filter element and the wall of the filtering cavity, a second filtering area is provided inside the filter element, and a plurality of filtering holes are provided on the filter element.

[0015] By adopting the above technical solution, water enters the filtration chamber from the water inlet end, gradually fills the first filtration area, and then enters the second filtration area through the filter holes. At this time, filtration is carried out, so that some impurities in the water are filtered and adsorbed on the filter element. Then the water gradually fills the second filtration area and gradually enters the water outlet end for indoor water supply.

[0016] Optionally, the sewage discharge member includes a sewage discharge cylinder and a sewage discharge valve provided on the sewage discharge cylinder. The sewage discharge cylinder is threadedly connected to the mounting cover, and a first O-ring is provided at the connection between the mounting cover and the sewage discharge member; the sewage discharge valve is used to open or close the sewage discharge cylinder.

[0017] By adopting the above technical solution, setting the first O-ring improves the sealing performance at the connection between the mounting cover and the sewage discharge member, preventing water from leaking out of the sewage discharge member.

[0018] Optionally, a second O-ring is provided at the connection between the mounting cover and the main cylinder body.

[0019] By adopting the above technical solution, setting the second O-ring improves the sealing performance at the connection between the mounting cylinder and the main cylinder body, preventing water from leaking out of the filter body.

[0020] Optionally, a water pressure gauge is provided at the top of the main cylinder body.

[0021] By adopting the above technical solution, installing the water pressure gauge can observe the water pressure when water passes through the pre-filter. When using water indoors, if the water output becomes smaller, it can be judged whether the water pressure becomes smaller when the water flow passes through the pre-filter according to the water pressure gauge, which is convenient for overhauling the pre-filter to maintain normal water pressure.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. Threadedly connect the first fixing member at the water inlet end and the second fixing member at the water outlet end. By means of threaded connection, the connection tightness at the connection between the water inlet end and the first fixing member and at the connection between the water outlet end and the second fixing member is improved, the sealing performance is increased, and the connection between the first connecting pipe and the first fixing member is closed by the cooperation of the first sealing protrusion and the first limiting protrusion, and the connection between the second connecting pipe and the second fixing member is closed by the cooperation of the second sealing protrusion and the second limiting protrusion, increasing the sealing performance at the connection between the first connecting pipe and the first fixing member and at the connection between the second connecting pipe and the second fixing member, so that the two connection points of the first fixing member and the second fixing member have good sealing performance and prevent water leakage; during installation, only the ends of the first connecting pipe and the second connection need to be connected to the water pipe. This straight-through type pre-filter improves the sealing performance of the pre-filter;

[0024] 2. Set the first sealing ring to improve the sealing performance at the connection between the first connecting pipe and the first fixing member and prevent water leakage;

[0025] 3. Set a second sealing ring to improve the sealing performance at the connection between the second connecting pipe and the second fixing member, preventing water leakage.

[0026] 4. Install a water pressure gauge to observe the water pressure when water passes through the pre-filter. When using water indoors, if the water output decreases, it can be judged whether the water pressure decreases when the water flow passes through the pre-filter according to the water pressure gauge, which is convenient for repairing the pre-filter to maintain normal water pressure. Brief Description of the Drawings

[0027] Figure 1 It is a schematic diagram of the overall structure of the straight-through type pre-filter according to the embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the structures of the first connecting pipe, the first fixing member, the second connecting pipe and the second fixing member of the embodiment.

[0029] Figure 3 It is a schematic sectional view of the filter body of the embodiment.

[0030] Figure 4 It is an exploded view of the filter body of the embodiment.

[0031] Description of the reference numerals: 1. Filter body; 101. Main cylinder; 102. Installation cover; 103. Filter element; 2. Water inlet end; 3. Water outlet end; 4. Drainage member; 41. Drainage cylinder; 42. Drainage valve; 5. Water inlet; 6. Water outlet; 7. First connecting pipe; 8. First fixing member; 9. First sealing protrusion; 10. First accommodating cavity; 11. First limiting protrusion; 12. Second connecting pipe; 13. Second fixing member; 14. Second sealing protrusion; 15. Second accommodating cavity; 16. Second limiting protrusion; 17. Installation thread; 18. First sealing ring; 19. Second sealing ring; 20. Filtering cavity; 21. First filtering area; 22. Second filtering area; 23. Filtering hole; 24. First O-ring; 25. Second O-ring; 26. Water pressure gauge. Detailed Description of the Embodiment

[0032] The following further describes the present application in detail with reference to FIGS. 1-4.

[0033] The embodiment of the present application discloses a straight-through type pre-filter. Refer to Figure 1 and Figure 2 , the straight-through type pre-filter includes a filter body 1, a water inlet end 2 integrally fixed to the filter body 1, a water outlet end 3 integrally fixed to the filter body 1, and a drainage member 4 installed on the filter body 1. A water inlet 5 is provided at the water inlet end 2, and a water outlet 6 is provided at the water outlet end 3. The water inlet end 2 and the water outlet end 3 are located on both sides of the filter body 1, and the drainage member 4 is located at the bottom of the filter body 1.

[0034] Refer toFigure 1 and Figure 2 On the water inlet end 2, a first connecting pipe 7 is connected. A first fixing member 8 is threadedly connected to the first connecting pipe 7. A first sealing protrusion 9 is fixed at one end of the first connecting pipe 7 close to the water inlet end 2. The first sealing protrusion 9 is located on the outer wall of the first connecting pipe 7. A first accommodating cavity 10 for accommodating the first connecting pipe 7 and the water inlet end 2 is formed on the first fixing member 8. A first limiting protrusion 11 is fixed on the first fixing member 8. The first limiting protrusion 11 is located on the side wall of the first accommodating cavity 10, and the first limiting protrusion 11 is located at one end of the first accommodating cavity 10 away from the water inlet end 2.

[0035] Refer to Figure 1 and Figure 2 On the water outlet end 3, a second connecting pipe 12 is connected. A second fixing member 13 is threadedly connected to the second connecting pipe 12. A second sealing protrusion 14 is fixed at one end of the second connecting pipe 12 close to the water outlet end 3. The second sealing protrusion 14 is located on the outer wall of the second connecting pipe 12. A second accommodating cavity 15 for accommodating the second connecting pipe 12 and the water outlet end 3 is formed on the second fixing member 13. A second limiting protrusion 16 is fixed on the second fixing member 13. The second limiting protrusion 16 is located on the side wall of the second accommodating cavity 15, and the second limiting protrusion 16 is located at one end of the second accommodating cavity 15 away from the water outlet end 3.

[0036] Refer to Figure 1 and Figure 2 Installation threads 17 are distributed on the outer walls of both the water inlet end 2 and the water outlet end 3. The first fixing member 8 and the second fixing member 13 are fixed to the filter body 1 through the installation threads 17.

[0037] Refer to Figure 1 and Figure 2 A first sealing ring 18 is installed on the first fixing member 8. The first sealing ring 18 is located in the first accommodating cavity 10, and the first sealing ring 18 is located between the first sealing protrusion 9 and the end of the water inlet end 2. Both sides of the first sealing ring 18 are in contact with the end of the water inlet end 2 and the side wall of the first sealing protrusion 9 respectively. A second sealing ring 19 is installed on the second fixing member 13. The second sealing ring 19 is located in the second accommodating cavity 15, and the second sealing ring 19 is located between the end of the water outlet end 3 and the second sealing protrusion 14. Both sides of the second sealing ring 19 are in contact with the end of the water outlet end 3 and the side wall of the second sealing protrusion 14 respectively.

[0038] Refer to Figure 1 and Figure 3, the filter body 1 includes a main cylinder 101, a mounting cover 102 mounted on the main cylinder 101, and a filter element 103 mounted in the main cylinder 101. A filtering cavity 20 is formed on the main cylinder 101. The filtering cavity 20 is communicated with both the water inlet 5 and the water outlet 6. The filter element 103 is mounted in the filtering cavity 20. A first filtering area 21 is formed between the outer wall of the filter element 103 and the cavity wall of the filtering cavity 20. A second filtering area 22 is formed inside the filter element 103. A number of filtering holes 23 are formed on the filter element 103. Water will flow along the direction of water inlet 5 - first filtering area 21 - second filtering area 22 - water outlet 6.

[0039] Referring to Figure 1 and Figure 4 , the sewage discharge member 4 includes a sewage discharge cylinder 41 and a sewage discharge valve 42 mounted on the sewage discharge cylinder 41. The sewage discharge cylinder 41 is threadedly connected to the mounting cover 102. A first O-ring 24 is mounted at the connection between the mounting cover 102 and the sewage discharge member 4. A second O-ring 25 is mounted at the connection between the mounting cover 102 and the main cylinder 101. The sewage discharge valve 42 is used to open or close the sewage discharge cylinder 41. A water pressure gauge 26 is mounted at the top end of the main cylinder 101.

[0040] The implementation principle of a through-type pre-filter in an embodiment of this application is as follows: Threadedly connect a first fixing member 8 to the water inlet end 2 and a second fixing member 13 to the water outlet end 3. By means of threaded connection, the connection tightness at the connection between the water inlet end 2 and the first fixing member 8 and at the connection between the water outlet end 3 and the second fixing member 13 is improved, and the sealing performance is increased. Moreover, the first connecting pipe 7 and the first fixing member 8 close the connection part through the cooperation of a first sealing protrusion 9 and a first limiting protrusion 11, and the second connecting pipe 12 and the second fixing member 13 close the connection part through the cooperation of a second sealing protrusion 14 and a second limiting protrusion 16, increasing the sealing performance at the connection between the first connecting pipe 7 and the first fixing member 8 and at the connection between the second connecting pipe 12 and the second fixing member 13, making the sealing performance of the two connection points of the first fixing member 8 and the second fixing member 13 good and preventing water leakage; during installation, only need to connect the ends of the first connecting pipe 7 and the second connection part to the water pipe, and add gaskets at the connection part. This through-type pre-filter improves the sealing performance of the pre-filter.

[0041] The above are all preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A straight-through pre-filter, characterized in that: The filter comprises a filter body (1), a water inlet end (2) arranged on the filter body (1), a water outlet end (3) arranged on the filter body (1), and a sewage discharge member (4) arranged on the filter body (1), wherein the water inlet end (2) is provided with a water inlet (5), the water outlet end (3) is provided with a water outlet (6), the water inlet end (2) and the water outlet end (3) are located on both sides of the filter body (1), and the sewage discharge member (4) is located at the bottom of the filter body (1); a first connecting pipe (7) is provided on the water inlet end (2), a first fixing member (8) is threadedly connected to the first connecting pipe (7), a first sealing protrusion (9) is provided on one end of the first connecting pipe (7) close to the water inlet end (2), a first accommodating cavity (10) for accommodating the first connecting pipe (7) and the water inlet end (2) is provided on the first fixing member (8), and a first sealing protrusion (9) is provided on the first fixing member (8) A first limiting protrusion (11) is provided, the first limiting protrusion (11) is located on the side wall of the first accommodating cavity (10), and the first limiting protrusion (11) is located at the end of the first accommodating cavity (10) away from the water inlet end (2); a second connecting pipe (12) is provided on the water outlet end (3), a second fixing member (13) is threadedly connected to the second connecting pipe (12), a second sealing protrusion (14) is provided at the end of the second connecting pipe (12) close to the water outlet end (3), a second accommodating cavity (15) for accommodating the second connecting pipe (12) and the water outlet end (3) is opened on the second fixing member (13), a second limiting protrusion (16) is provided on the second fixing member (13), the second limiting protrusion (16) is located on the side wall of the second accommodating cavity (15), and the second limiting protrusion (16) is located at the end of the second accommodating cavity (15) away from the water outlet end (3).

2. The straight-through pre-filter according to claim 1, characterized in that: The outer walls of the water inlet end (2) and the water outlet end (3) are both provided with mounting threads (17), and the first fixing member (8) and the second fixing member (13) are fixed to the filter body (1) via the mounting threads (17).

3. The straight-through pre-filter according to claim 1, characterized in that: The first fixing member (8) is provided with a first sealing ring (18), the first sealing ring (18) is located in the first accommodating cavity (10), and the first sealing ring (18) is located between the first sealing protrusion (9) and the end of the water inlet end (2).

4. The straight-through pre-filter according to claim 3, characterized in that: The second fixing member (13) is provided with a second sealing ring (19), the second sealing ring (19) is located in the second accommodating cavity (15), and the second sealing ring (19) is located between the end of the water outlet (3) and the second sealing protrusion (14).

5. The straight-through pre-filter according to claim 1, characterized in that: The filter body (1) comprises a main cylinder (101), a mounting cover (102) arranged on the main cylinder (101), and a filter element (103) arranged in the main cylinder (101); a filter cavity (20) is provided on the main cylinder (101); the filter element (103) is installed in the filter cavity (20); a first filter area (21) is provided between the outer wall of the filter element (103) and the cavity wall of the filter cavity (20); a second filter area (22) is provided in the filter element (103); and a plurality of filter holes (23) are provided on the filter element (103).

6. The straight-through pre-filter according to claim 5, characterized in that: The sewage discharge member (4) comprises a sewage discharge cylinder (41) and a sewage discharge valve (42) arranged on the sewage discharge cylinder (41); the sewage discharge cylinder (41) is threadedly connected to the mounting cover (102); a first O-ring (24) is provided at the connection between the mounting cover (102) and the sewage discharge member (4); the sewage discharge valve (42) is used to open or close the sewage discharge cylinder (41).

7. The straight-through pre-filter according to claim 5, characterized in that: A second O-type gasket (25) is provided at the connection between the mounting cover (102) and the main cylinder body (101).

8. The straight-through pre-filter according to claim 5, characterized in that: A water pressure gauge (26) is provided at the top of the main cylinder (101).

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