Backflow prevention filter inlet valve

Abstract

The utility model relates to a kind of anti-backflow filtering water inlet valve, including valve body, the valve body has water inlet and the water inlet passage being communicated with water inlet, the water inlet passage is equipped with filter screen, the end of filter screen away from water inlet is equipped with connecting seat, sealing sleeve that is sealed with the inner wall of water inlet passage is sleeved on the connecting seat, the end of sealing sleeve away from water inlet is integrally formed with the anti-backflow baffle that can be elastically deformed, the water outlet is set up on the connecting seat, the anti-backflow baffle is bent deformation to open water outlet when being pushed by water flow when water inlet passage water, and it is elastically reset to block water outlet when water inlet passage does not water. By setting connecting seat on the end of filter screen, and sealing sleeve and anti-backflow baffle are set on the connecting seat, the problems, such as the structure of existing water inlet valve is complex, assembly is complicated, maintenance is inconvenient etc. are solved, with the advantages of simple structure, easy assembly, maintenance efficient etc.

Description

Technical Field

[0001] This utility model relates to the field of water inlet valve technology, specifically to an anti-backflow filter water inlet valve. Background Technology

[0002] The inlet valve is a key component controlling the flow of water. Traditional inlet valves typically include an anti-backflow assembly to prevent backflow and a filter assembly to remove impurities. The anti-backflow assembly usually works by using a spring in conjunction with a sealing element. When the water flow stops or a reverse flow trend occurs, the spring pushes the sealing element against the valve seat, thus blocking the backflow. Furthermore, the anti-backflow assembly and the filter assembly are generally designed independently. These factors contribute to a complex overall structure, cumbersome assembly, and inconvenient maintenance. Utility Model Content

[0003] The purpose of this utility model is to provide an anti-backflow filter inlet valve that is compact in structure, easy to assemble, and convenient to maintain, thereby solving the problems of complex structure, cumbersome assembly, and inconvenient maintenance caused by the independent design of the anti-backflow component composed of springs and sealing parts and the filter screen component in the existing inlet valve.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an anti-backflow filter inlet valve, comprising a valve body, the valve body having an inlet and an inlet channel communicating with the inlet, a filter screen being provided in the inlet channel, a connecting seat being provided at the end of the filter screen away from the inlet, a sealing sleeve being fitted on the connecting seat to seal against the inner wall of the inlet channel, an anti-backflow baffle being integrally formed at the end of the sealing sleeve away from the inlet and capable of elastic deformation, an outlet being provided on the connecting seat, the anti-backflow baffle being pushed and bent by the water flow to open the outlet when water enters the inlet channel, and elastically returning to its original position to block the outlet when water does not enter the inlet channel.

[0005] As a further optimization of this utility model, the water outlet has multiple outlets arranged circumferentially along the connecting seat, the edge of the anti-backflow baffle is connected to the sealing sleeve, and the middle of the anti-backflow baffle is provided with a water passage hole that allows water flow to be concentrated.

[0006] As a further optimization of this utility model, the end of the connecting seat away from the water inlet is spherical, thereby providing an arc-shaped fitting surface for the anti-backflow baffle.

[0007] As a further optimization of this utility model, a sealing flange is provided around the water outlet on the end face of the connecting seat away from the water inlet.

[0008] As a further optimization of this utility model, the side wall of the connecting seat is provided with an annular protrusion, and the inner wall of the sealing sleeve is provided with an annular limiting groove that cooperates with the annular protrusion.

[0009] As a further optimization of this utility model, a positioning ring is provided on the side wall of the connecting seat, and the end of the sealing sleeve near the water inlet abuts against the positioning ring.

[0010] As a further optimization of this utility model, the filter screen is shaped like a frustum, and the larger end of the filter screen is positioned close to the water inlet.

[0011] As a further optimization of this utility model, the filter screen is provided with a sealing ring at one end near the water inlet, which can seal with the inner wall of the water inlet channel.

[0012] As a further optimization of this utility model, the side wall of the filter screen is provided with an elastic buckle that can engage with the inner wall of the water inlet channel.

[0013] Compared with the prior art, this utility model has the following advantages: by setting a connecting seat at the end of the filter screen, and setting a sealing sleeve and an anti-backflow baffle on the connecting seat, the elastic deformation of the anti-backflow baffle is used to realize the function of automatically opening when water enters and automatically blocking when water stops. This solves the problems of the anti-backflow component composed of spring and sealing component in the existing water inlet valve, as well as the complex structure, cumbersome assembly, and inconvenient maintenance caused by the independent design of the anti-backflow component and the filter screen component. It has the advantages of simple structure, convenient assembly, and efficient maintenance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a three-dimensional schematic diagram of the cooperation between the filter screen and the sealing sleeve in this utility model;

[0017] Figure 4 This is an exploded view of the filter screen and sealing sleeve in this utility model;

[0018] Figure 5 This is a cross-sectional view of the filter screen and sealing sleeve in this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the filter screen and sealing sleeve in the water inlet channel of this utility model. Detailed Implementation

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1 to 6As shown, this utility model discloses an anti-backflow filter inlet valve, including a valve body 1. The valve body 1 has an inlet 11 and an inlet channel 12 communicating with the inlet 11. A filter screen 2 is provided in the inlet channel 12. A connecting seat 21 is provided at the end of the filter screen 2 away from the inlet 11. A sealing sleeve 31 is fitted on the connecting seat 21 to seal against the inner wall of the inlet channel 12. An anti-backflow baffle 32 that can elastically deform is integrally formed at the end of the sealing sleeve 31 away from the inlet 11. An outlet 211 is provided on the connecting seat 21. When water enters the inlet channel 12, the anti-backflow baffle 32 is pushed and bent by the water flow to open the outlet 211, and when water does not enter the inlet channel 12, it elastically resets to block the outlet 211.

[0022] The valve body 1 serves as the main structure of the inlet valve, and is equipped with an inlet 11 for connecting to external water sources such as tap water pipes or water pump outlets, and an inlet channel 12 communicating with the inlet 11. A filter screen 2 is located on the side of the inlet channel 12 near the inlet 11. In this embodiment, the filter screen 2 includes a filter screen body with multiple filter screen openings for intercepting impurities in the water flow, preventing impurities from entering the valve body 1 and causing blockage or damage. The connecting seat 21 serves as the supporting structure for the anti-backflow component, and is located at the end of the filter screen 2 away from the inlet 11. The connecting seat 21 has an outlet 211 for the filtered water to pass through. A sealing sleeve 31 is fitted around the outer periphery of the connecting seat 21, and an anti-backflow baffle 32 is located at the end of the sealing sleeve 31 away from the inlet 11. In one embodiment, the sealing sleeve 31 and the anti-backflow baffle 32 are integrally molded from rubber or other elastic materials. The sealing sleeve 31 achieves a seal with the water inlet channel 12 through an interference fit, while the elastic deformation of the anti-backflow baffle 32 controls the opening and closing of the outlet, resulting in a compact structure. The anti-backflow baffle 32 has a thin sheet or petal-like shape, capable of bending and deforming under the pressure of water flow, thereby opening the outlet 211. When the water flow stops or a backflow tendency occurs, it elastically resets itself, tightly fitting the edge of the outlet 211 to achieve an anti-backflow seal.

[0023] The working process of the water inlet valve of this utility model is as follows:

[0024] When water enters the inlet channel 12, the water flows into the inlet channel 12 from the inlet 11. After the water is filtered by the filter screen 2, the water pushes the anti-backflow baffle 32 away from the outlet 211, causing it to undergo elastic deformation and open the outlet 211. The water then enters the valve body 1 through the outlet 211. When the water flow in the inlet channel 12 stops or flows back, the anti-backflow baffle 32 resets under its own elasticity and fits against the edge of the outlet 211, thus blocking the backflow of water and preventing water from flowing back to the inlet side.

[0025] By setting a connecting seat 21 at the end of the filter screen 2, and setting a sealing sleeve 31 and an anti-backflow baffle 32 on the connecting seat 21, the elastic deformation of the anti-backflow baffle 32 is used to realize the function of automatically opening when water enters and automatically sealing when water stops. This solves the problems of the existing anti-backflow component composed of spring and sealing component in the water inlet valve, as well as the complex structure, cumbersome assembly, and inconvenient maintenance caused by the independent design of the anti-backflow component and the filter screen component. It has the advantages of simple structure, convenient assembly, and efficient maintenance.

[0026] The outlet 211 has multiple outlets and is arranged around the circumference of the connecting seat 21. The edge of the anti-backflow baffle 32 is connected to the sealing sleeve 31. The center of the anti-backflow baffle 32 is provided with a water passage hole 321 that allows water flow to be concentrated.

[0027] In this embodiment, the outlet 211 is a through hole penetrating the connecting seat 21, and the outlets 211 are evenly spaced along the circumference of the connecting seat 21 to ensure uniform water flow. The anti-backflow baffle 32 is integrally formed with the sealing sleeve 31 through its outer peripheral edge, resulting in a long service life. When water enters the inlet channel 12, the anti-backflow baffle 32 mainly deforms in the central area to connect the outlet 211 with the water passage hole 321, with the deformation position concentrated. Compared with some existing anti-backflow structures that disperse water flow, the anti-backflow baffle 32 has a water passage hole 321 in the middle, allowing multiple streams of water flowing out of each outlet 211 to flow into the valve body 1 through a single water passage hole 321, ensuring its stability.

[0028] The end of the connecting seat 21 away from the water inlet 11 is spherical, thus providing an arc-shaped fitting surface for the anti-backflow baffle 32.

[0029] The end of the connecting seat 21 away from the inlet 11 has a spherical crown-shaped structure, making the entire end a convex arc-shaped surface, which provides an arc-shaped fitting surface for the anti-backflow baffle 32. This allows the anti-backflow baffle 32 to fit more tightly against the surface of the connecting seat 21 in the reset state, thereby enhancing the sealing performance between the anti-backflow baffle 32 and the connecting seat 21. At the same time, the arc-shaped surface guides the water flow from the outlet 211 to the water passage 321 in the middle of the anti-backflow baffle 32, further improving the stability of the water inlet channel 12 when water enters.

[0030] A sealing flange 212 is provided on the end face of the connector 21 away from the inlet 11, surrounding the outlet 211.

[0031] When the anti-backflow baffle 32 is in contact with the sealing flange 212, a local sealing line is formed, which further improves the sealing effect and prevents the backflowing water from entering the water passage 321 and flowing in from the edge of the outlet 211.

[0032] The connecting seat 21 has an annular protrusion 213 on its side wall, and the sealing sleeve 31 has an annular limiting groove 311 on its inner wall that cooperates with the annular protrusion 213.

[0033] In this embodiment, the outer circumferential surface of the side wall of the connecting seat 21 is provided with an annular protrusion 213, and the inner wall of the sealing sleeve 31 is provided with an annular limiting groove 311 that cooperates with the annular protrusion 213, thereby realizing the limiting assembly and axial fixation between the sealing sleeve 31 and the connecting seat 21, and preventing the sealing sleeve 31 from falling off or shifting during use.

[0034] The connecting seat 21 has a positioning ring 214 on its side wall, and the end of the sealing sleeve 31 near the water inlet 11 abuts against the positioning ring 214.

[0035] The positioning ring 214 is set at the end of the sealing sleeve 31 near the water inlet. While assisting in the installation of the sealing sleeve 31, it restricts the water flow from directly into the gap between the connecting seat 21 and the sealing sleeve 31, thereby improving the overall sealing performance.

[0036] The filter screen 2 is shaped like a frustum, and the larger end of the filter screen 2 is positioned close to the water inlet 11.

[0037] The filter screen 2 has a frustum-shaped structure, and the design of the large end of the filter screen 2 being close to the water inlet 11 can optimize the water flow distribution, increase the filtration area, and improve the filtration efficiency.

[0038] The filter screen 2 is provided with a sealing ring 22 at one end near the water inlet 11, which can seal with the inner wall of the water inlet channel 12.

[0039] By setting the sealing ring 22, the filter screen 2 is in the assembled state, and the sealing ring 22 is tightly attached to the inner wall of the water inlet channel 12, which restricts the water flow entering from the water inlet 11 from bypassing the filter screen 2, thereby improving the filtration effect.

[0040] The side wall of the filter screen 2 is provided with an elastic buckle 23 that can be engaged with the inner wall of the water inlet channel 12.

[0041] By providing an elastic buckle 23 on the side wall of the filter screen 2, when the filter screen 2 is inserted into the water inlet channel 12, the elastic buckle 23 deforms elastically and engages with the limiting groove and other limiting structures (not shown in the figure) on the inner wall of the water inlet channel 12, thereby achieving rapid positioning and axial fixation of the filter screen 2.

Claims

1. A backflow prevention filter inlet valve, characterized in that, The device includes a valve body (1), which has an inlet (11) and an inlet channel (12) communicating with the inlet (11). A filter screen (2) is provided in the inlet channel (12). A connecting seat (21) is provided at one end of the filter screen (2) away from the inlet (11). A sealing sleeve (31) is fitted on the connecting seat (21) to seal against the inner wall of the inlet channel (12). An anti-backflow baffle (32) capable of elastic deformation is integrally formed at one end of the sealing sleeve (31) away from the inlet (11). An outlet (211) is provided on the connecting seat (21). When water enters the inlet channel (12), the anti-backflow baffle (32) is pushed and bent by the water flow to open the outlet (211), and when water does not enter the inlet channel (12), it elastically resets to block the outlet (211).

2. The anti-backflow filter inlet valve according to claim 1, characterized in that, The outlet (211) has multiple outlets and is arranged circumferentially along the connecting seat (21). The edge of the anti-backflow baffle (32) is connected to the sealing sleeve (31). The middle part of the anti-backflow baffle (32) is provided with a water passage hole (321) that allows water flow to be concentrated.

3. The anti-backflow filter inlet valve according to claim 2, characterized in that, The end of the connecting seat (21) away from the water inlet (11) is spherical, thus providing an arc-shaped fitting surface for the anti-backflow baffle (32).

4. The anti-backflow filter inlet valve according to claim 3, characterized in that, The connecting seat (21) has a sealing flange (212) around the outlet (211) on the end face away from the inlet (11).

5. The anti-backflow filter inlet valve according to claim 1, characterized in that, The connecting seat (21) has an annular protrusion (213) on its side wall, and the sealing sleeve (31) has an annular limiting groove (311) on its inner wall that cooperates with the annular protrusion (213).

6. The anti-backflow filter inlet valve according to claim 1, characterized in that, The connecting seat (21) has a positioning ring (214) on its side wall, and the end of the sealing sleeve (31) near the water inlet (11) abuts against the positioning ring (214).

7. The anti-backflow filter inlet valve according to claim 1, characterized in that, The filter screen (2) is shaped like a frustum, and the larger end of the filter screen (2) is located near the water inlet (11).

8. The anti-backflow filter inlet valve according to claim 7, characterized in that, The filter screen (2) is provided with a sealing ring (22) at one end near the water inlet (11) that can seal with the inner wall of the water inlet channel (12).

9. The anti-backflow filter inlet valve according to claim 1, characterized in that, The side wall of the filter screen (2) is provided with an elastic buckle (23) that can engage with the inner wall of the water inlet channel (12).

Images