Pre-filter with high sealing performance

Abstract

The utility model relates to a prefilter with high sealing performance, which comprises a connecting shell, a filter bottle arranged on the connecting shell and a filter element arranged in the filter bottle, a connector is arranged at the bottom of the filter bottle, a copper joint is inserted in the connector, a plurality of ring grooves are formed in the peripheral wall of the copper joint, and first O-shaped rings are arranged in the plurality of ring grooves in a one-to-one correspondence manner; the first O-shaped ring abuts against the groove wall of the annular groove and the inner wall of the connector, and a second O-shaped ring is arranged at the bottom of the filter bottle. The sewage discharging connector is arranged at the bottom of the filter bottle, an abutting wall facing the bottom of the connector is arranged on the peripheral wall of the sewage discharging connector, the second O-shaped gasket is connected between the abutting wall and the bottom of the connector in an abutting mode, and the sewage discharging connector is connected to the copper connector; and a switch valve is arranged on the pollution discharge connecting piece. The device has the effect that the risk of liquid leakage between the pollution discharge connecting piece and the filter bottle is low.

Description

Technical Field

[0001] The present application relates to the field of filter technology, and in particular to a pre-filter with high sealing performance. Background Art

[0002] Prefilters typically have a T-shaped structure. The filter's accuracy ranges from 5 to 300 microns, depending on the brand and model. They primarily remove impurities like sediment, bacteria, microbial debris, rust, sand, and other particles larger than 5 microns from pipes, preventing harm to the human body and skin. They also actively protect downstream pipes, water purifiers, water heaters, washing machines, high-end faucets, and showerheads.

[0003] A pre-filter in the related art has a water flow path that goes through an inlet pipe, a filter bottle, the outer wall of a filter element within the filter bottle, and the inner cavity of the filter element. The inner cavity of the filter element is connected to an outlet pipe, allowing filtered water to flow out through the outlet pipe. Impurities remain in the outer filter bottle. The bottom of the filter bottle is provided with a drain connector, which is equipped with a drain valve. The drain connector is detachably connected to the filter bottle, resulting in a risk of leakage between the drain connector and the outer bottle. Utility Model Content

[0004] In order to reduce the risk of leakage between the sewage discharge connector and the filter bottle, the present application provides a pre-filter with high sealing performance.

[0005] The present application provides a pre-filter with high sealing performance, which adopts the following technical solution:

[0006] A pre-filter with high sealing performance comprises a connecting shell, a filter bottle arranged on the connecting shell and a filter element arranged in the filter bottle, a connecting head is provided at the bottom of the filter bottle, a copper joint is inserted in the connecting head, a plurality of annular grooves are provided on the outer peripheral wall of the copper joint, a first O-ring is provided in the plurality of annular grooves in a one-to-one correspondence, the first O-ring abuts the annular groove wall and the inner wall of the connecting head, a second O-ring is provided at the bottom of the filter bottle; it also comprises a sewage discharge connector provided at the bottom of the filter bottle, the outer peripheral wall of the sewage discharge connector is provided with a tightening wall facing the bottom of the connecting head, the second O-ring abuts between the tightening wall and the bottom of the connecting head, the sewage discharge connector is connected to the copper joint; a switch valve is provided on the sewage discharge connector.

[0007] By adopting this technical solution, the first O-ring on the copper connector enhances the waterproofing effect when the cylindrical connector is inserted into the connector. The second O-ring abuts between the abutment wall and the bottom of the connector, achieving a double seal, further improving leak-proof performance and reducing the risk of leakage between the drain connector and the filter bottle. When draining is required, the water from the copper connector flows into the drain connector, and the on-off valve controls the water flow within the drain connector.

[0008] Optionally, the sewage connection piece includes a drain pipe and a connecting shell, the switch valve is arranged on the drain pipe, and the outer diameter of the connecting shell is smaller than the outer diameter of the drain pipe.

[0009] By adopting the above technical solution, the drain pipe is convenient for installing the switch valve, and the outer diameter of the connecting shell is smaller than the outer diameter of the drain pipe, which makes it convenient to connect the shell to the water pipe and improve the installation efficiency.

[0010] Optionally, the outer wall of the connecting shell is provided with anti-slip teeth.

[0011] By adopting the above technical solution, the connecting shell is connected to the water pipe, and the anti-slip teeth increase the friction between the connecting shell and the water pipe to prevent the water pipe from detaching.

[0012] Optionally, a driving sleeve is provided on the rotating handle of the switch valve, and an indicator bar is provided on the driving sleeve. When the indicator bar is downward, the switch valve is open, and when the indicator bar is horizontal, the switch valve is closed.

[0013] By adopting the above technical solution, the indicator bar provides instructions for user operation, conveniently showing whether the switch valve is open or closed.

[0014] Optionally, the top of the copper joint is located in the filter bottle, a limiting convex ring is provided on the circumferential outer wall of the top of the copper joint, a limiting platform for supporting the limiting convex ring is provided at the bottom of the filter bottle, and the sewage connection piece is threadedly connected to the copper joint.

[0015] By adopting the above technical solution, the sewage discharge connector is threadedly connected to the copper joint. When tightened, the limiting convex ring presses against the limiting platform, and the second O-ring presses between the pressing wall and the bottom of the connector, so that the sealing effect is good and the copper joint is convenient to be installed on the filter bottle.

[0016] Optionally, a connecting cylinder is provided at the bottom of the connecting shell, a fixing ring groove is provided on the inner wall of the connecting cylinder, and a fixing convex ring is provided on the circumferential outer wall of the top of the filter bottle, and the fixing convex ring is clamped in the fixing ring groove.

[0017] By adopting the above technical solution, the convex ring firmly engages the ring groove, and the connecting shell is not easily separated from the filter bottle.

[0018] Optionally, a chamfer is provided on a circumferential edge of the bottom opening of the end portion of the connecting tube away from the connecting shell.

[0019] By adopting the above technical solution, the chamfer facilitates the insertion and clamping of the top opening of the filter bottle into the connecting cylinder.

[0020] Optionally, a ring platform is further provided on the circumferential outer wall of the top opening of the filter bottle, and when the connecting tube abuts against the ring platform away from the end of the connecting shell, the fixed protruding ring is clamped in the fixed ring groove.

[0021] By adopting the above technical solution, the ring platform facilitates the positioning of the connection shell and is more convenient for installation.

[0022] Optionally, it includes a pressure reducing valve arranged in the connecting shell, and the valve core of the pressure reducing valve is arranged at the top opening of the inner cavity of the filter element.

[0023] By adopting the above technical solution, the pressure reducing valve can easily adjust the pressure in the filter bottle.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The first O-ring improves the waterproof effect when the copper connector is inserted into the connecting head. At the same time, a second O-ring is provided to achieve double sealing, further improving the leak-proof performance. The sewage connection piece allows sewage to flow out of the pre-filter along the sewage connection piece when the on-off valve is opened, reducing the risk of leakage between the sewage connection piece and the filter bottle.

[0026] 2. The limiting convex ring abuts against the limiting platform, the sewage connection is firmly installed, and the sealing effect of the second O-ring is improved;

[0027] 3. The chamfer makes it easier to connect the top of the filter bottle with the connecting tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is an overall schematic diagram of a pre-filter with high sealing performance according to an embodiment.

[0029] Figure 2 yes Figure 1 A partial enlarged view of point A.

[0030] Figure 3 yes Figure 1 A partial enlarged view at point B.

[0031] Explanation of the accompanying reference numerals: 1. Connecting shell; 11. Water inlet; 12. Water outlet; 2. Filter bottle; 3. Filter element; 31. Connecting head; 4. Copper joint; 41. First O-ring; 42. Second O-ring; 43. Ring groove; 5. Sewage connection piece; 51. Drain pipe; 52. Connecting shell; 53. Switch valve; 54. Anti-slip teeth; 55. Drive sleeve; 56. Indicator strip; 61. Limiting convex ring; 62. Limiting platform; 63. Abutting wall; 64. Connecting cylinder; 65. Fixed ring groove; 66. Fixed convex ring; 67. Ring platform; 7. Chamfer; 8. Pressure reducing valve. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0033] The embodiment of the present application discloses a pre-filter with high sealing performance. Figure 1The highly airtight pre-filter comprises a connecting housing 1, a filter bottle 2 secured to the connecting housing 1, and a filter cartridge 3 secured within the filter bottle 2. A water inlet 11 is defined on the left side of the connecting housing 1, and a water outlet 12 is defined on the right side. A pressure reducing valve 8 is installed within the connecting housing 1, with the valve core of the pressure reducing valve 8 movably positioned at the top opening of the filter cartridge 3. Pressure reducing valve 8 controls the opening of the top opening of the filter cartridge 3 to regulate pressure. Water passes through the water inlet 11, the filter bottle 2, the inner cavity of the filter cartridge 3, and the water outlet 12 in sequence, achieving filtration.

[0034] Reference Figure 2 A connecting tube 64 is fixed to the bottom of the connecting shell 1. The inner cavity of the connecting tube 64 communicates with the inner cavity of the connecting shell 1. The top of the filter bottle 2 is inserted into the connecting tube 64. A fixing ring groove 65 is formed on the inner wall of the connecting tube 64. A fixing protrusion 66 is fixed to the outer peripheral wall of the top of the filter bottle 2. The fixing ring groove 65 is fixed to the fixing protrusion 66.

[0035] Reference Figure 2 A ring platform 67 is also fixed to the outer peripheral wall of the top opening of the filter bottle 2. When the end of the connecting tube 64 away from the connecting shell 1 abuts the ring platform 67, the fixed protruding ring 66 is engaged in the fixed ring groove 65. The circumferential edge of the inner bottom opening of the end of the connecting tube 64 away from the connecting shell 1 is provided with a chamfer 7, which facilitates the engagement of the fixed protruding ring 66 in the fixed ring groove 65.

[0036] Reference Figure 3 A connector 31 is fixed to the bottom of the filter bottle 2, and a copper connector 4 is inserted into the connector 31. A plurality of annular grooves 43 are formed on the outer peripheral wall of the copper connector 4, and a first O-ring 41 is sleeved in each of the annular grooves 43. The first O-ring 41 abuts against the groove wall of the annular groove 43 and the inner wall of the connector 31 to form a seal.

[0037] Reference Figure 1 、 Figure 3 The highly airtight pre-filter also includes a drain connector 5 disposed at the bottom of the filter bottle 2, with an on-off valve 53 fixed to it. The drain connector 5 includes a drain pipe 51 and a connecting housing 52, with the on-off valve 53 integrally formed with the drain pipe 51. The outer diameter of the connecting housing 52 is smaller than that of the drain pipe 51, facilitating the connection of the water pipe to the connecting housing 52. Anti-slip teeth 54 are fixed to the outer wall of the connecting housing 52, preventing the water pipe from detaching after installation.

[0038] Reference Figure 1 、 Figure 3The outer circumferential wall of the drainage connector 5 is provided with a tightening wall 63 facing the bottom of the connector 31. The tightening wall 63 is located at the top of the drain pipe 51. A second O-ring 42 is sleeved on the bottom of the cylindrical joint. The second O-ring 42 abuts between the tightening wall 63 and the bottom of the connector 31. The drainage connector 5 is connected to the copper joint 4. The top of the copper joint 4 is located within the filter bottle 2. A limit ring 61 is fixed to the outer circumferential wall of the top of the copper joint 4. A limit platform 62 is fixed to the bottom of the filter bottle 2 to support the limit ring 61. The drainage connector 5 is threadedly connected to the copper joint 4, so that the second O-ring 42 is clamped between the tightening wall 63 and the bottom of the connector 31, improving the sealing effect.

[0039] Reference Figure 1 A driving sleeve 55 is fixed on the rotating handle of the switch valve 53, and an indicator bar 56 is provided on the driving sleeve 55. When the indicator bar 56 is downward, the switch valve 53 is open; when the indicator bar 56 is horizontal, the switch valve 53 is closed.

[0040] The implementation principle of a highly sealed pre-filter in an embodiment of the present application is as follows: when in use, water flows into the pre-filter through the water inlet 11. When the water is at the connector 31, the first O-ring 41 and the second O-ring 42 effectively prevent the water from flowing out of the filter bottle 2. The water flows through the filter element 3 and then flows to the water outlet 12 to complete the filtration of the water. When it is necessary to drain the filter element 3, adjust the pressure reducing valve 8 to allow the water to flow into the tube joint, put the water pipe on the anti-slip teeth 54, and open the switch valve 53 on the sewage connection 5 to achieve sewage discharge.

[0041] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pre-filter with high sealing performance, comprising a connecting shell (1), a filter bottle (2) arranged on the connecting shell (1), and a filter element (3) arranged in the filter bottle (2), characterized in that: The bottom of the filter bottle (2) is provided with a connector (31), a copper joint (4) is inserted into the connector (31), a plurality of annular grooves (43) are provided on the outer peripheral wall of the copper joint (4), a first O-ring (41) is provided in the plurality of annular grooves (43) in a one-to-one correspondence, the first O-ring (41) abuts against the groove wall of the annular groove (43) and the inner wall of the connector (31), and a second O-ring (42) is provided at the bottom of the filter bottle (2); the filter bottle (2) also includes a sewage connection piece (5) provided at the bottom of the filter bottle (2), the outer peripheral wall of the sewage connection piece (5) is provided with a pressing wall (63) facing the bottom of the connector (31), the second O-ring (42) abuts between the pressing wall (63) and the bottom of the connector (31), and the sewage connection piece (5) is connected to the copper joint (4); the sewage connection piece (5) is provided with an on-off valve (53).

2. The pre-filter with high sealing performance according to claim 1, characterized in that: The sewage connection piece (5) comprises a drain pipe (51) and a connection shell (52); the switch valve (53) is arranged on the drain pipe (51); and the outer diameter of the connection shell (52) is smaller than the outer diameter of the drain pipe (51).

3. The pre-filter with high sealing performance according to claim 2, characterized in that: The outer wall of the connecting shell (52) is provided with anti-slip teeth (54).

4. The pre-filter with high sealing performance according to claim 2, characterized in that: A driving sleeve (55) is provided on the rotating handle of the switch valve (53), and an indicator bar (56) is provided on the driving sleeve (55). When the indicator bar (56) faces downward, the switch valve (53) is opened, and when the indicator bar (56) faces horizontally, the switch valve (53) is closed.

5. The pre-filter with high sealing performance according to claim 1, characterized in that: The top of the copper joint (4) is located in the filter bottle (2); a limiting convex ring (61) is provided on the circumferential outer wall of the top of the copper joint (4); a limiting platform (62) for supporting the limiting convex ring (61) is provided at the bottom of the filter bottle (2); and the sewage connection piece (5) is threadedly connected to the copper joint (4).

6. The pre-filter with high sealing performance according to claim 1, characterized in that: The bottom of the connecting shell (1) is provided with a connecting tube (64), the inner wall of the connecting tube (64) is provided with a fixing ring groove (65), and the circumferential outer wall of the top opening of the filtering bottle (2) is provided with a fixing convex ring (66), and the fixing convex ring (66) is clamped in the fixing ring groove (65).

7. The pre-filter with high sealing performance according to claim 6, characterized in that: A chamfer (7) is provided on the circumferential edge of the bottom opening of the end portion of the connecting tube (64) away from the connecting shell (1).

8. The pre-filter with high sealing performance according to claim 6, characterized in that: The circumferential outer wall of the top opening of the filter bottle (2) is further provided with a ring platform (67). When the end of the connecting tube (64) away from the connecting shell (1) abuts against the ring platform (67), the fixed protruding ring (66) is clamped in the fixed ring groove (65).

9. The pre-filter with high sealing performance according to claim 1, characterized in that: It also includes a pressure reducing valve (8) arranged in the connecting shell (1), and the valve core of the pressure reducing valve (8) is arranged at the top opening of the inner cavity of the filter element (3).

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