Pre-filter with double filter screens

Abstract

The utility model relates to the technical field of filters, and discloses a double-filter-screen pre-filter, which comprises a shell, a filter screen, a first filter screen, a second filter screen, a first filter screen and a second filter screen, the water inlet pipe is arranged at the left end of the shell, and the water inlet pipe is communicated with the shell; the water outlet pipe is arranged at the right end of the shell, and the water outlet pipe is communicated with the two filter screens; the side shell is arranged on one side outside the outer shell, an inner rod is arranged in the side shell, a fixing ring is arranged outside the top end of the inner rod, a lantern ring is installed outside the fixing ring through a torsional spring, and bristles are arranged outside the lantern ring. Through the arrangement of the double-filter-screen structure, the filtering area is increased, and the flow is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a double-screen pre-filter. Background Art

[0002] A pre-filter is a device installed at the front end of a household water supply system. It primarily filters large impurities in tap water, such as silt, rust, insect eggs, and bloodworms, to protect household water equipment from damage and improve water quality. Typically installed on the tap water pipe after the water meter, the pre-filter serves as the first line of defense for household water use.

[0003] There are three types of pre-filters available: a single vertical filter element, a dual vertical series arrangement, and a single horizontal arrangement. A single filter element has a small filtration area, and over time, the filter flow rate decreases, leading to a decrease in flow at the outlet. A dual vertical series arrangement, with water passing through one element before flowing into the second, essentially maintains the same first-stage filter element area as a single element. This also reduces flow over time, leading to the development of dual-mesh pre-filters. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a double-mesh pre-filter to solve the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above purpose, the present invention provides the following technical solution: a double-mesh pre-filter, comprising:

[0008] An outer shell, wherein filter screens are provided on both upper and lower sides of the inner shell;

[0009] a water inlet pipe, disposed at the left end of the housing, the water inlet pipe being in communication with the housing;

[0010] A water outlet pipe is provided at the right end of the housing and is connected to the two filters;

[0011] The side shell is arranged on one side of the outer shell, the inner shell is provided with an inner rod, the outer side of the top end of the inner rod is provided with a fixing ring, the outer side of the fixing ring is installed with a collar through a torsion spring, and the outer side of the collar is provided with bristles.

[0012] Preferably, the upper and lower parts of the left end surface of the shell are both provided with blocking covers, and the blocking covers are connected to the shell through threaded fitting, and the blocking covers are opened to discharge impurities inside the filter.

[0013] Preferably, the side shell is connected to the outer shell, and springs are provided on both sides of the top end inside the side shell, so that the limiting ball has automatic reset function.

[0014] Preferably, a groove is provided on the outside of the top end of the inner rod, and the groove is integrally formed with the inner rod.

[0015] Preferably, a limiting ball is provided inside the spring piece and inside the groove, and the limiting ball is connected to the spring piece, and the limiting ball combines with the groove to limit and fix the inner rod.

[0016] Preferably, a handle is provided at the tail end of the inner rod, and the handle is connected to the inner rod, so that the handle facilitates the grip of the inner rod.

[0017] (3) Beneficial effects

[0018] Compared with the prior art, the present invention provides a double-screen pre-filter with the following beneficial effects:

[0019] By installing two filters, water entering through the water inlet pipe is evenly distributed across the two filter surfaces, increasing the filtration area. After filtration, the water flows out through the outlet. Compared with existing technologies, this doubles the effective filtration area, significantly extending the service life of the filter, and solving the problems raised in the background art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0022] Figure 3 For the utility model Figure 2 A partial enlarged view of area A in the middle.

[0023] In the figure: 1. Outer shell; 2. Water inlet pipe; 3. Water outlet pipe; 4. Filter; 5. Plug cover; 6. Side shell; 7. Inner rod; 8. Handle; 9. Shrapnel; 10. Limiting ball; 11. Groove; 12. Fixing ring; 13. Ring; 14. Bristles. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] This utility model provides a technical solution, double filter pre-filter, please refer to Figure 1 、 Figure 2 and Figure 3 ,include:

[0026] The housing 1 has filter screens 4 disposed on both the upper and lower sides of the housing 1;

[0027] The water inlet pipe 2 is provided at the left end of the housing 1 and is in communication with the housing 1;

[0028] The water outlet pipe 3 is provided at the right end of the housing 1 and is connected to the two filter screens 4;

[0029] The side shell 6 is arranged on one side of the outer shell 1. The inner rod 7 is arranged inside the side shell 6. The outer side of the top of the inner rod 7 is provided with a fixing ring 12. The outer side of the fixing ring 12 is installed with a ring 13 through a torsion spring. The outer side of the ring 13 is provided with bristles 14.

[0030] See also Figure 2 , the upper and lower parts of the left end face of the shell 1 are provided with blocking covers 5, and the blocking covers 5 are connected to the shell 1 through threaded cooperation. The blocking covers 5 are opened to discharge impurities inside the filter 4. When cleaning, the blocking covers 5 are removed to expose the inner cavity of the shell 1, and the inner rod 7 with bristles 14 is extended into the shell 1 to perform circumferential cleaning on the outer surface of the filter 4 at the corresponding position.

[0031] See also Figure 3 The side shell 6 is connected to the outer shell 1, and springs 9 are provided on both sides of the top of the inner side shell 6. The springs 9 enable the limiting ball 10 to have automatic reset properties.

[0032] See also Figure 3 A groove 11 is provided on the outside of the top end of the inner rod 7 , and the groove 11 is integrally formed with the inner rod 7 .

[0033] See also Figure 3 A limiting ball 10 is provided inside the spring piece 9 and located inside the groove 11 , and the limiting ball 10 is connected to the spring piece 9 , and the limiting ball 10 is combined with the groove 11 to limit and fix the inner rod 7 .

[0034] See also Figure 1 and Figure 2 A handle 8 is provided at the tail end of the inner rod 7, and the handle 8 is connected to the inner rod 7, so that the handle 8 can be used to hold the inner rod 7.

[0035] This solution: water enters through the water inlet pipe 2, the water flows into the outer shell 1, the water flows through the filter screen 4 and is filtered and then discharged through the water outlet pipe 3 at one end. In this way, two filter screens 4 are used to increase the filtration area and improve the overall filtration speed. The plug cover 5 is turned to open, and the handle 8 is pulled to pull out the inner rod 7. Then the inner rod 7 is inserted into the outer shell 1 and moved left and right. When the inner rod 7 is pushed, the bristles 14 are retracted. When the inner rod 7 is pulled forward, the bristles 14 are opened. Then the handle 8 causes the inner rod 7 to rotate circumferentially around the outside of the filter screen 4, thereby circumferentially cleaning the outside of the filter screen 4.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Double filter pre-filter, characterized by: include: A housing (1), wherein filter screens (4) are provided on both upper and lower sides of the interior of the housing (1); A water inlet pipe (2) is provided at the left end of the housing (1), and the water inlet pipe (2) is in communication with the housing (1); A water outlet pipe (3) is provided at the right end of the housing (1), and the water outlet pipe (3) is connected to the two filter screens (4); A side shell (6) is arranged on one side outside the outer shell (1); an inner rod (7) is arranged inside the side shell (6); a fixing ring (12) is arranged outside the top end of the inner rod (7); a collar (13) is installed outside the fixing ring (12) via a torsion spring; and bristles (14) are arranged outside the collar (13).

2. The double-mesh pre-filter according to claim 1, characterized in that: The upper and lower parts of the left end surface of the housing (1) are both provided with blocking covers (5), and the blocking covers (5) are connected to the housing (1) through threaded engagement.

3. The double-mesh pre-filter according to claim 1, characterized in that: The side shell (6) is connected to the outer shell (1), and spring pieces (9) are provided on both sides of the top end inside the side shell (6).

4. The double-mesh pre-filter according to claim 3, characterized in that: A groove (11) is provided on the outside of the top end of the inner rod (7), and the groove (11) and the inner rod (7) are integrally formed.

5. The double-mesh pre-filter according to claim 4, characterized in that: A limiting ball (10) is provided inside the spring piece (9) and located inside the groove (11), and the limiting ball (10) is connected to the spring piece (9).

6. The double-mesh pre-filter according to claim 1, characterized in that: A handle (8) is provided at the tail end of the inner rod (7), and the handle (8) is connected to the inner rod (7).

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