Filter screen one-way valve

Abstract

The utility model relates to the technical field of faucet accessories, in particular to a filter screen one-way valve which comprises a valve body, a water passing channel formed in the valve body, a valve seat arranged in the valve body and a valve plate arranged in the valve body in a sliding mode through a non-return device and used for abutting against the valve seat in a sealing mode. An elastic filter screen is arranged at the position, located at the water inlet end of the water passing channel, of the valve body through a first clamping device, and the middle of the elastic filter screen protrudes to be used for enlarging the contact space with fluid and improving the filtering efficiency.

Description

Technical Field

[0001] The faucet fitting of the utility model relates to the technical field, and particularly relates to a filter check valve. Background Art

[0002] In order to provide the function of supplying cold and hot water, faucets are generally connected with cold and hot water inlet pipes. However, when the water pressures between the two inlet pipes are inconsistent, water will flow chaotically, resulting in unstable water outlet temperature of the faucet. It is impossible to accurately control the water outlet temperature through the regulating valve core, which greatly affects the use experience. Therefore, most faucets now install check valves on the inlet pipes to avoid chaotic flow. However, after a long time of filtering and interception, a large amount of impurities will accumulate at the water outlet end of the check valve, blocking the water outlet end of the check valve and affecting the water outlet function of the check valve. And most of the filters and check valves are integrally formed. Once the filter is damaged, the entire valve body needs to be replaced, which is very wasteful of resources. Summary of the Utility Model

[0003] Therefore, in view of the above problems, the utility model proposes a filter check valve.

[0004] To achieve the above object, the technical solution of the utility model is to provide a filter check valve, which includes a valve body, a water passing channel opened on the valve body, a valve seat arranged in the valve body, and a valve plate that can be slidably arranged in the valve body through a check device and is used to resist and seal with the valve seat. An elastic filter screen is arranged at the water inlet end of the water passing channel on the valve body through a first clamping device. The middle part of the elastic filter screen bulges to increase the contact space with the fluid and improve the filtering efficiency.

[0005] Further improvement is that: the first clamping device includes: a limiting ring block arranged on the valve body, at least two anti-detachment clamping blocks arranged on the elastic filter screen, and the bottom of the elastic filter screen resists against the valve seat.

[0006] Further improvement is that: the check device includes: an elastic mounting sleeve arranged on the valve body at the other end of the valve seat through a second clamping device, a sliding sleeve in the middle of the elastic mounting sleeve, several connecting plates arranged between the sliding seat and the elastic mounting sleeve, and a valve rod that can be slidably arranged on the sliding sleeve and one end of which is connected to the valve plate. An elastic guiding device is also arranged between the valve plate and the elastic mounting sleeve.

[0007] Further improvement is that: the second clamping device includes: a clamping ring block arranged on the valve body, and a clamping ring groove opened on the elastic mounting sleeve.

[0008] Further improvement is that: a first chamfer is also opened at one end of the elastic mounting sleeve close to the valve seat.

[0009] Further improvement: An extension platform is further provided at one end of the elastic mounting sleeve away from the valve seat, and a counterbore matching the extension platform is provided on the valve body.

[0010] Further improvement: The elastic guiding device includes: a guiding groove opened at one end of the valve plate close to the elastic mounting sleeve, and a spring sleeved on the valve stem with one end resisting against one end of the guiding groove and the other end resisting against the connecting plate or the sliding sleeve.

[0011] Further improvement: A sealing ring is further sleeved on the valve plate, and the valve seat has a taper for gradually enhancing the sealing performance along with the change of the fluid pressure.

[0012] Further improvement: An installation ring platform for facilitating installation is further provided on the valve body, and a sealing sleeve matching the installation ring platform is further sleeved on the installation ring platform.

[0013] Further improvement: Second chamfers and third chamfers are respectively opened at both ends of the limiting ring block, and fourth chamfers and fifth chamfers matching the second chamfers and the third chamfers are respectively opened at both ends of the anti - detachment latch block.

[0014] Further improvement: A plurality of reinforcing ribs matching the outer diameter of the valve plate are further provided inside the valve body.

[0015] The advantages and beneficial effects of the present utility model are as follows:

[0016] The structure is simple and the use is convenient. Through the first clamping device, an elastic filter screen is provided, which facilitates the user to quickly disassemble the damaged elastic filter screen and replace it with a new one, improving the convenience of use, saving resources, and the elastic filter screen bulges towards the water inlet direction, thus increasing the contact space between the elastic filter screen and the fluid, greatly improving the filtration speed. Impurities are easily washed by the fluid and slide along the convex direction to the periphery of the filter screen check valve, avoiding impurities adhering to the surface of the elastic filter screen and affecting filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three - dimensional schematic diagram of a filter screen check valve of the present utility model;

[0018] Figure 2 is a front - view sectional schematic diagram of a filter screen check valve of the present utility model;

[0019] Figure 3 is an exploded schematic diagram of a filter screen check valve of the present utility model;

[0020] Figure 4 is an enlarged schematic diagram of part A of a filter screen check valve of the present utility model;

[0021] In the figure: 1. Valve body; 2. Water passage; 3. Valve seat; 4. Valve plate; 5. Elastic filter screen; 6. Limit ring block; 7. Anti - detachment latch block; 8. Second chamfer; 9. Third chamfer; 10. Fourth chamfer; 11. Fifth chamfer; 12. Elastic mounting sleeve; 13. Sliding sleeve; 14. Connecting plate; 15. Valve rod; 16. Engaging ring block; 17. Engaging ring groove; 18. First chamfer; 19. Extension platform; 20. Counterbore; 21. Guide groove; 22. Spring; 23. Sealing ring; 24. Mounting ring platform; 25. Sealing sleeve; 26. Reinforcing rib. Detailed implementation manners

[0022] The following combines the drawings and embodiments to further describe the detailed implementation manners of the present utility model. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model and cannot be used to limit the protection scope of the present utility model.

[0023] As Figures 1 - 4 shown, a filter screen check valve includes a valve body 1, a water passage 2 opened on the valve body 1, a valve seat 3 arranged in the valve body 1, and a valve plate 4 slidably arranged in the valve body 1 through a check device and used to resist and seal with the valve seat 3. An elastic filter screen 5 is arranged at the water inlet end of the water passage 2 on the valve body 1 through a first engaging device. The middle of the elastic filter screen 5 bulges to increase the contact space with the fluid and improve the filtering efficiency.

[0024] To facilitate the installation of the elastic filter screen 5, the first engaging device includes: a limit ring block 6 arranged on the valve body 1 and at least two anti - detachment latch blocks 7 arranged on the elastic filter screen 5. The bottom of the elastic filter screen 5 abuts against the valve seat 3.

[0025] To facilitate the clamping and fixing of the elastic filter screen 5 and the release of the clamping and fixing, the two ends of the limit ring block 6 are respectively provided with a second chamfer 8 and a third chamfer 9, and the two ends of the anti - detachment latch block 7 are respectively provided with a fourth chamfer 10 and a fifth chamfer 11 that cooperate with the second chamfer 8 and the third chamfer 9. During installation, the second chamfer 8 and the fourth chamfer 10 cooperate for sliding, and during disassembly, the third chamfer 9 and the fifth chamfer 11 cooperate for sliding.

[0026] To facilitate the installation of the valve plate 4, the check device includes: an elastic mounting sleeve 12 arranged at the other end of the valve seat 3 on the valve body 1 through a second engaging device, a sliding sleeve 13 in the middle of the elastic mounting sleeve 12, several connecting plates 14 arranged between the sliding seat and the elastic mounting sleeve 12, and a valve rod 15 slidably arranged on the sliding sleeve 13 and having one end connected to the valve plate 4. An elastic guiding device is also arranged between the valve plate 4 and the elastic mounting sleeve 12.

[0027] To facilitate the installation of the elastic mounting sleeve 12, the second engaging device includes: an engaging ring block 16 provided on the valve body 1 and an engaging ring groove 17 formed on the elastic mounting sleeve 12.

[0028] To engage and fix the elastic mounting sleeve 12, a first chamfer 18 is further formed on one end of the elastic mounting sleeve 12 close to the valve seat 3.

[0029] To prevent the elastic mounting sleeve 12 from sliding when impacted by the fluid, an extension platform 19 is further provided on one end of the elastic mounting sleeve 12 away from the valve seat 3, and a counterbore 20 matching the extension platform 19 is formed on the valve body 1.

[0030] To enhance the moving stability of the valve plate 4 and enable it to quickly reset, the elastic guiding device includes: a guiding groove 21 formed on one end of the valve plate 4 close to the elastic mounting sleeve 12, and a spring 22 sleeved on the valve rod 15 with one end resisting against the guiding groove 21 and the other end resisting against the connecting plate 14 or the sliding sleeve 13.

[0031] To enhance the sealing performance between the valve plate 4 and the valve seat 3, a sealing ring 23 is further sleeved on the valve plate 4, and the valve seat 3 has a taper to gradually enhance the sealing performance as the fluid pressure changes.

[0032] To facilitate installation and prevent water leakage, an installation ring platform 24 for easy installation is further provided on the valve body 1, and a sealing sleeve 25 matching the installation ring platform 24 is sleeved on the installation ring platform 24.

[0033] To enhance the strength of the valve body 1 and the sliding stability of the valve plate 4, a plurality of reinforcing ribs 26 matching the outer diameter of the valve plate 4 are further provided inside the valve body 1.

[0034] The elastic filter net 5 and the elastic mounting sleeve 12 are made of plastic material.

[0035] The sealing sleeve 25 is a rubber sealing sleeve, and the sealing ring 23 is a rubber sealing ring.

[0036] Working principle: During installation, the valve plate 4 and the spring 22 are placed into the valve body 1. Then, the sliding sleeve 13 is aligned with the valve rod 15, and the elastic mounting sleeve 12 is aligned with the counterbore 20. Then, force can be applied to press down. At this time, the elastic mounting sleeve 12 undergoes a certain deformation and thus engages with the valve body 1. At this time, the elastic filter net 5 is pressed onto the valve body 1 with force to complete the assembly.

[0037] During use, fluid flows from the elastic filter screen 5 into the valve body 1. At this time, impurities are filtered on the surface of the elastic filter screen 5 and are gradually washed to the periphery of the elastic filter screen 5 as the fluid flows. The fluid flowing into the valve body 1 will push the valve plate 4 to move and release its resistance to the valve seat 3, so as to flow into the faucet. When the fluid in the faucet needs to flow out of the valve body 1, it will push the valve plate 4 to seal with the valve seat 3, thereby preventing cross-flow.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter one-way valve, comprising a valve body, a water passage opened on the valve body, a valve seat arranged in the valve body, and a valve plate slidably arranged in the valve body through a check device for resisting sealing with the valve seat, characterized in that: An elastic filter net is arranged at the water inlet end of the water passage on the valve body through a first clamping device, and a protrusion in the middle of the elastic filter net is used to increase the contact space with the fluid and improve the filtering efficiency.

2. A filter check valve according to claim 1, characterized in that: The first clamping device comprises: a limiting ring block arranged on the valve body, and at least two anti-dropping clamping blocks arranged on the elastic filter net, and the bottom of the elastic filter net resists the valve seat.

3. A filter check valve according to claim 1, characterized in that: The non-return device includes: an elastic mounting sleeve arranged on the valve body at the other end of the valve seat through a second clamping device, a sliding sleeve located in the middle of the elastic mounting sleeve, a plurality of connecting plates arranged between the sliding seat and the elastic mounting sleeve, a valve stem slidably arranged on the sliding sleeve and connected to the valve plate at one end, and an elastic guiding device is also arranged between the valve plate and the elastic mounting sleeve.

4. A filter check valve according to claim 3, characterized in that: The second clamping device comprises: a clamping ring block arranged on the valve body and a clamping ring groove formed on the elastic mounting sleeve.

5. A filter check valve according to claim 4, characterized in that: The elastic mounting sleeve is also provided with a first chamfer on one end close to the valve seat.

6. A filter check valve according to claim 4, characterized in that: An extension platform is also arranged on one end of the elastic mounting sleeve away from the valve seat, and a countersunk hole matching the extension platform is opened on the valve body.

7. A filter check valve according to claim 3, characterized in that: The elastic guide device comprises: a guide groove provided on one end of the valve plate close to the elastic mounting sleeve, and a spring sleeved on the valve stem with one end resisting against the guide groove and the other end resisting against the connecting plate or the sliding sleeve.

8. The filter check valve according to claim 1, characterized in that: The valve plate is also sleeved with a sealing ring, and the valve seat has a taper for gradually enhancing the sealing performance as the fluid pressure changes.

9. A filter check valve according to claim 1, characterized in that: The valve body is also provided with a mounting ring platform for easy installation, and the mounting ring platform is also sleeved with a sealing sleeve matching the mounting ring platform.

10. A filter check valve according to claim 2, characterized in that: The two ends of the limit ring block are respectively provided with a second chamfer and a third chamfer, and the two ends of the anti-dropping clamp block are respectively provided with a fourth chamfer and a fifth chamfer that match the second chamfer and the third chamfer.

11. A filter check valve according to claim 1, characterized in that: A plurality of reinforcing ribs matching the outer diameter of the valve plate are also arranged inside the valve body.

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