Check valve with filter screen

Abstract

The check valve with the filter screen comprises an upper valve body, a lower valve body, a valve element and an elastic piece, the upper valve body and the lower valve body are connected into a whole in a clamped mode, and the upper valve body is provided with a filter screen part, a water inlet and a movable cavity; the valve element is located in the movable cavity and connected with the elastic piece in a sleeved mode so that the elastic piece can reciprocate in the axial direction of the movable cavity under the action of water pressure, and a sealing part for sealing the water inlet is arranged at the end, close to the water inlet, of the valve element. The lower valve body is provided with a water outlet, the two ends of the elastic piece abut against the position between the water outlet and the valve element, and the valve element can reset under the action of the elastic piece. According to the check valve with the filter screen, the filter screen is ingeniously designed and combined to the valve body of the check valve, and the check valve is integrally formed in an injection molding mode through a mold, so that cost is saved; the mounting part and the force application part are arranged outside the check valve body, the force application part can be directly taken by hand, and the disassembly and assembly can be completed without a tool, so that the disassembly and assembly mode is optimized.

Description

Technical Field

[0001] The utility model belongs to the field of check valves, and in particular relates to a check valve with a filter screen. Background Art

[0002] In the prior art, in order to prevent the faucet from mixing water and backflow, a mounting hole is usually provided at the water inlet end to install a check valve. However, in order to install the limit fixed check valve, a groove is usually processed on the side wall of the mounting hole to install a retaining ring. However, this method requires a special tool, a retaining ring pliers, to install and disassemble, which is inconvenient to install and disassemble. In addition, in order to prevent the faucet from being blocked inside, a sealing gasket with a filter is usually designed and selected, and the sealing gasket with a filter is more expensive than the sealing gasket without a filter. Utility Model Content

[0003] The utility model aims to solve the problem that the installation of the check valve in the prior art requires a groove to be machined on the side wall of the installation hole for installing the retaining ring, so a special tool retaining ring pliers is needed for installation and removal, which is inconvenient for installation and removal.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a check valve with a filter, comprising an upper valve body, a lower valve body, a valve core and an elastic member, the upper valve body and the lower valve body are formed into a whole by snapping, the upper valve body is provided with a filter portion, a water inlet and a movable chamber, the filter portion is arranged on the top of the upper valve body and a mesh water inlet is formed on the top of the valve body and / or the top side by arranging staggered ribs; the valve core is located in the movable chamber and is sleeved on the elastic member so that it can reciprocate along the axial direction of the movable chamber under the action of water pressure, and a sealing portion for sealing the water inlet is provided at one end thereof close to the water inlet; the lower valve body is provided with a water outlet, the two ends of the elastic member are respectively pressed against the water outlet and the valve core, and the valve core can be reset under the action of the elastic member.

[0005] Preferably, the valve core comprises a guide rod, the guide rod is arranged at the center of the valve core, and the elastic member is sleeved on the guide rod.

[0006] Preferably, the lower valve body is provided with a guide sleeve for accommodating the guide rod.

[0007] Preferably, a sheet-shaped force-applying portion is also provided on the top of the upper valve body.

[0008] Preferably, a mounting portion is further provided on the side of the upper valve body, and the mounting portion is a flange extending outward.

[0009] Preferably, a mounting portion is further provided on the side of the upper valve body, and the mounting portion is a threaded structure.

[0010] Preferably, a clamping ring is provided at the bottom end of the upper valve body, a step surface and a clamping groove are provided at the outer periphery of the lower valve body, the bottom end surface of the upper valve body abuts against the step surface and the clamping ring is clamped in the clamping groove.

[0011] Preferably, an annular groove is provided on the outer periphery of the upper valve body, and a sealing ring is installed in the annular groove.

[0012] The utility model has the following beneficial effects: the utility model provides a check valve with a filter, in which the filter is cleverly designed and combined with the check valve body, and is integrally injection molded by a mold to save costs; an installation portion and a force-applying portion are arranged outside the check valve body, and the force-applying portion can be directly taken by hand, and disassembly and assembly can be completed without tools, thereby optimizing the disassembly and assembly method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For a technician in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 It is a three-dimensional exploded view of the utility model;

[0015] Figure 2 The utility model is a cross-sectional view Figure 1 ;

[0016] Figure 3 The utility model is a cross-sectional view Figure 2 ;

[0017] Figure 4 It is a three-dimensional schematic diagram of the utility model;

[0018] Figure 5 The utility model is installed in the faucet water inlet joint Figure 1 ;

[0019] Figure 6 The utility model is installed in the faucet water inlet joint Figure 2 .

[0020] In the figure, 1-lower valve body; 101-step surface; 102-slot; 103-clamping ring; 104-guide sleeve; 2-elastic member; 3-valve core; 301-guide rod; 4-first sealing ring; 5-upper valve body; 501-flange; 502-mesh first water inlet; 503-filter part; 504-force-applying part; 505-second water inlet; 6-second sealing ring; 7-check valve with filter; 8-angle joint; 9-sealing gasket; 10-mounting nut; 11-countersunk hole; 12-faucet water inlet joint; 13-external thread; 14-internal thread. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the first technician in the field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the first technician in the field without making creative work belong to the scope of protection of the utility model.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] Example

[0027] The following are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the following embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0028] Reference Manual Attached Figure 1-4 A check valve with a filter, which mainly includes a lower valve body 1, an upper valve body 5, a valve core 3 and an elastic member 2. The upper valve body 5 and the lower valve body 1 are connected to form a whole. The upper valve body 5 is provided with a filter part 503, a mesh first water inlet 502 and an active cavity; the lower valve body 1 is provided with a water outlet at the bottom. The upper end of the active cavity is provided with a second water inlet 505, and the filter part 503 is provided on the top of the upper valve body 5. The mesh first water inlet 502 is formed on the top of the valve body and / or the side of the top by cleverly arranging staggered ribs. The water first passes through the mesh first water inlet 502, filters foreign matter such as iron filings, and then passes through the second water inlet 505, the active cavity and the water outlet in turn before flowing into water-using appliances such as faucets. The valve core 3 is located in the active cavity and can reciprocate along the axial direction of the active cavity under the action of water pressure. One end of the valve core 3 is provided with a sealing portion (first sealing ring 4) that can seal the second water inlet 505; the two ends of the elastic member 2 are respectively pressed between the water outlet and the valve core 3.

[0029] The valve core 3 is also provided with a guide rod 301 downward; the lower valve body 1 is provided with a hollow guide sleeve 104, the guide rod 301 is movably sleeved in the guide sleeve 104, and the elastic member 2 is a spring, which is sleeved on the outer periphery of the guide sleeve 104 (refer to the attached manual). Figure 2-3 , which is simultaneously sleeved on the outer periphery of the guide sleeve 104 and the outer periphery of the guide rod 301). The guide rod 301 is located at the center of the valve core 3, and the guide sleeve 104 is located in the active cavity and at the center of the lower valve body 1. The force-applying part 504, the filter part 503 and the mesh first water inlet 502 are arranged on the top of the upper valve body, and a mounting part is arranged on the side of the upper valve body; the water outlet is arranged on the bottom end surface of the lower valve body, and the active cavity can be formed between the upper valve body and the lower valve body. Figure 2 The upper valve body 5 is provided with a clamping ring 103 at the bottom end, and the lower valve body 1 is provided with a step surface 101 and a clamping groove 102 on the outer periphery. The bottom end surface of the upper valve body 5 is against the step surface 101 and the clamping ring 103 is clamped in the clamping groove. The upper valve body is provided with an annular groove on the outer periphery, and a second sealing ring 6 is installed in the annular groove.

[0030] Reference Manual Attached Figure 4-5 In one embodiment of the utility model, a force-applying portion 504 is also provided on the top of the filter part, and the force-applying portion is a sheet rib protruding upward, which is used to facilitate the removal and disassembly of the check valve. A mounting portion is also provided on the side of the valve body, and the mounting portion is a flange 501 extending outwards, which is used to press-fit the limit check valve. Figure 6 In another embodiment, a mounting portion is further provided on the side of the valve body, and the mounting portion is a threaded structure (the check valve with filter 7 is an external thread mechanism 13, and the corresponding angle joint 8 is an internal thread structure 14) for rotatably mounting the check valve.

[0031] Reference Manual Attached Figure 5 A check valve mounting hole is provided in the faucet water inlet joint, and a countersunk hole 11 is provided at the water inlet of the mounting hole. When installing, the flange 501 is placed in the countersunk hole. When the sealing gasket 9 is locked and pressed by the angle joint 8 and the mounting nut 10, the sealing gasket 9 limits the axial outward movement of the check valve with filter 7, and a limiting step is provided at the water outlet of the faucet water inlet joint to limit the axial inward movement, so that installation and disassembly are convenient. The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A check valve with filter, characterized in that: The utility model comprises an upper valve body, a lower valve body, a valve core and an elastic member, wherein the upper valve body and the lower valve body are connected to form a whole, the upper valve body is provided with a filter part, a water inlet and a movable cavity, the filter part is arranged on the top of the upper valve body and a mesh water inlet is formed on the top of the valve body and / or on the top side by arranging staggered ribs; the valve core is located in the movable cavity and is sleeved on the elastic member so that it can reciprocate along the axial direction of the movable cavity under the action of water pressure, and a sealing part is provided at one end thereof close to the water inlet for sealing the water inlet; the lower valve body is provided with a water outlet, the two ends of the elastic member are respectively pressed between the water outlet and the valve core, and the valve core can be reset under the action of the elastic member.

2. The check valve with filter according to claim 1, characterized in that: The valve core comprises a guide rod, the guide rod is arranged at the center of the valve core, and the elastic member is sleeved on the guide rod.

3. The check valve with filter according to claim 2, characterized in that: The lower valve body is provided with a guide sleeve for accommodating the guide rod.

4. The check valve with filter according to claim 1, characterized in that: A sheet-shaped force-applying portion is also provided on the top of the upper valve body.

5. The check valve with filter according to claim 1, characterized in that: A mounting portion is also provided on the side of the upper valve body, and the mounting portion is a flange extending outward.

6. The check valve with filter according to claim 1, characterized in that: A mounting portion is also provided on the side of the upper valve body, and the mounting portion is a threaded structure.

7. The check valve with filter according to claim 1, characterized in that: The bottom end of the upper valve body is provided with a clamping ring, the outer periphery of the lower valve body is provided with a step surface and a clamping groove, the bottom end surface of the upper valve body is against the step surface and the clamping ring is clamped in the clamping groove.

8. The check valve with filter according to claim 1, characterized in that: An annular groove is arranged on the outer periphery of the upper valve body, and a sealing ring is arranged in the annular groove.

Images