Throttling one-way valve and water outlet device

Abstract

The throttling one-way valve comprises a shell, a piston piece, an elastic piece and a first sealing ring, a water inlet channel and a water passing cavity which are communicated with each other are sequentially formed in the shell from top to bottom, a sealing section is arranged on the inner circumferential wall of the water inlet channel, the piston piece comprises a disc-shaped piston part, and the elastic piece is arranged on the piston part. A plurality of water passing through holes are formed in the piston part, the first sealing ring can expand outwards in the radial direction to deform when bearing water pressure so as to partially shield the water passing area of the water passing through holes, the piston part always keeps the trend of moving upwards under the elastic force action of the elastic piece, and the piston part moves upwards so that the first sealing ring can abut against the sealing section to block the water inlet channel. The flow control function and the non-return function are integrated in one mechanism, an independent flow control mechanism is not needed, parts are fewer, large flow in a low water pressure state can be achieved under the condition of lower cost, and better user experience is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, in particular to a throttling one-way valve and a water outlet device. Background Art

[0002] Existing water outlet devices (such as shower heads, faucets, etc.) are equipped with a throttling check valve at the water inlet to achieve water saving and anti-return functions. The flow control and water flow anti-return functions of the existing throttling check valve are achieved through different mechanisms of a component. The anti-return function is achieved through the spring reciprocating mechanism at the upper end of the throttling check valve, and the flow control is achieved through the O-ring mechanism at the lower end of the throttling check valve. However, the existing throttling check valve has the following defects: (1) The water flow first passes through the spring reciprocating mechanism and then to the O-ring mechanism. Since the spring reciprocating mechanism has a certain obstruction effect on the water flow, the water flow rate has been partially restricted after the water flow passes through this mechanism and before it further passes through the O-ring mechanism. This will result in a small water flow rate under low pressure conditions (such as 0.1MPa water pressure), affecting user experience; (2) The flow control and anti-return functions of the existing throttling check valve are achieved through two separate mechanisms, the spring reciprocating mechanism and the O-ring mechanism, respectively, which have many parts and high costs. Utility Model Content

[0003] The present invention aims to solve at least one of the above-mentioned technical problems in the related art to a certain extent. To this end, the present invention provides a throttling one-way valve.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] The utility model also provides a water outlet device having the throttling one-way valve.

[0006] According to the throttling one-way valve of the first aspect of the present invention, it includes an outer shell, a piston part, an elastic part and a first sealing ring. A water inlet channel and a water flow chamber are formed in sequence from top to bottom in the outer shell. The inner peripheral wall of the water inlet channel has a sealing section. The piston part includes a disc-shaped piston part, which can move up and down in the water flow chamber. A plurality of water flow holes are provided on the piston part. The first sealing ring is fixed to the upper end face of the piston part. When the first sealing ring is subjected to water pressure, it can expand and deform radially outward to partially block the water flow area of ​​the water flow hole. The elastic part is located below the piston part. The piston part always maintains an upward movement trend under the elastic force of the elastic part. The upward movement of the piston part can cause the first sealing ring to abut against the sealing section to block the water inlet channel.

[0007] The throttling one-way valve according to the embodiment of the utility model has at least the following beneficial effects:

[0008] 1. The present invention achieves both flow control and backflow prevention functions through a piston member with a sealing ring. When the water is turned off, the elastic member is not subjected to pressure, and the first sealing ring fits tightly against the sealing section, preventing water from passing through and achieving the backflow prevention function. When water is flowing, water flows through the water inlet channel to the piston member. Due to the action of the water pressure, the elastic member is compressed, and the piston member moves downward under the action of the water pressure. The first sealing ring separates from the sealing section, opening the water path, allowing water to enter the water flow chamber and pass through the water flow hole, achieving water flow. When there is no water pressure or the water pressure is low, the first sealing ring on the piston portion does not deform or deforms only slightly, and has no effect on the water flow area. When the water pressure is high, the water flow exerts a high pressure on the first sealing ring, causing it to deform, thereby blocking part of the water flow area of ​​the water flow hole, reducing the entire water flow area. The entire process achieves a large water flow area when the water flow rate is low, and a small water flow area when the water flow rate is high, thereby achieving the purpose of flow control.

[0009] 2. The utility model integrates the flow control function and the check function into one mechanism, avoiding the situation that the throttling one-way valve on the existing market has a small flow rate under low water pressure, and does not require a separate flow control mechanism, has fewer parts, and is lower in cost. In this way, the utility model can achieve a larger flow rate under low water pressure at a lower cost, and provide a better user experience.

[0010] According to some embodiments of the present invention, the sealing section is located at the lower end of the water inlet channel, and the sealing section is a conical wall surface that gradually tilts toward the center from bottom to top.

[0011] According to some embodiments of the present invention, the piston member further includes a boss, which is fixed to the middle part of the upper end surface of the piston portion, and the outer periphery of the upper portion of the boss is provided with two or more locking protrusions spaced circumferentially, and the first sealing ring is sleeved on the outer periphery of the boss and is embedded between the locking protrusions and the piston portion.

[0012] According to some embodiments of the present invention, the piston portion is disc-shaped, and the water through holes are distributed in a ring array on the piston portion with the boss as the center.

[0013] According to some embodiments of the present invention, a base is further included, which includes an annular sleeve, a positioning column and a plurality of spokes. The positioning column is located in the middle position of the annular sleeve, and the spokes are fixedly connected to the annular sleeve and the positioning column. The annular sleeve is connected to the lower end of the outer shell. The elastic member is a spring, the upper end of the spring abuts against the piston part, and the lower end of the spring is sleeved on the positioning column.

[0014] According to some embodiments of the present invention, a positioning hole is formed on the positioning column, and the piston member further includes a piston rod, which is fixed to the lower end surface of the piston portion and slidably assembled in the positioning hole.

[0015] According to some embodiments of the present invention, the outer peripheral wall of the annular sleeve is provided with a flange, and the inner peripheral wall of the lower end of the shell is provided with a groove, and the shell is sleeved with the base through the cooperation of the groove and the flange.

[0016] According to some embodiments of the present invention, the outer peripheral wall of the piston portion is clearance-fitted with the inner peripheral wall of the outer shell.

[0017] According to some embodiments of the present invention, a second sealing ring is further included. An annular groove is provided on the outer peripheral wall of the upper end of the shell, and the second sealing ring is embedded in the annular groove.

[0018] The water outlet device according to the second embodiment of the present utility model includes the throttling one-way valve.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a cross-sectional view of the throttling one-way valve of the present invention (water off state);

[0022] Figure 2 This is a cross-sectional view of the throttling one-way valve of the present utility model (in water flow state);

[0023] Figure 3 It is an exploded view of the throttling one-way valve of the utility model;

[0024] Figure 4 It is a structural diagram of the piston member of the utility model;

[0025] Figure 5 It is a structural diagram of the base of the utility model.

[0026] Figure numerals: outer shell 100, water inlet channel 110, sealing section 111, water flow chamber 120, annular groove 130, piston member 200, piston part 210, water flow hole 211, boss 220, locking protrusion 230, piston rod 240, elastic member 300, first sealing ring 400, base 500, annular sleeve 510, flange 511, positioning column 520, positioning hole 521, spoke 530, second sealing ring 600. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Reference Figure 1-5 A throttling check valve includes a housing 100, a piston member 200, an elastic member 300, and a first sealing ring 400. The housing 100 is formed with a water inlet channel 110 and a water passage cavity 120 in sequence from top to bottom. The inner peripheral wall of the water inlet channel 110 has a sealing section 111. The piston member 200 includes a disc-shaped piston portion 210. The piston portion 210 can move up and down in the water passage cavity 120. The piston portion 210 is provided with a plurality of water passage holes 211. The first sealing ring 400 is fixed to the upper end surface of the piston part 210. When the first sealing ring 400 is subjected to water pressure, it can be deformed and expanded radially outward to partially block the water flow area of ​​the water through hole 211. The elastic member 300 is located below the piston part 210. The piston part 210 always maintains an upward movement trend under the elastic force of the elastic member 300. The upward movement of the piston part 210 can cause the first sealing ring 400 to abut against the sealing section 111 to block the water inlet channel 110.

[0030] Working principle:

[0031] (1) Anti-return principle: When the water is turned off, the elastic member 300 is not subjected to pressure, and the first sealing ring 400 is tightly fitted with the sealing section 111. When the water valve is turned off, the water that has passed through the throttling one-way valve flows back through the water through hole 211 to the position of the first sealing ring 400. Due to the action of the elastic member 300, the first sealing ring 400 is tightly fitted with the sealing section 111 to prevent the passage of water flow, thereby realizing the anti-return function.

[0032] (2) Water flow principle: In the water flow state, water flows through the water inlet channel 110 to the piston member 200. Due to the action of water pressure, the elastic member 300 is compressed, and the piston member 200 moves downward under the action of water pressure. The first sealing ring 400 is separated from the sealing section 111, the water channel is opened, and water flows into the water chamber 120 and passes through the water through hole 211 to achieve water flow.

[0033] (3) Flow control principle: When there is no water pressure or the water pressure is low, the first sealing ring 400 does not deform or deforms only slightly on the piston part 210, and has no effect on the water flow area; when the water pressure is high, the water flow exerts a high pressure on the first sealing ring 400, causing the first sealing ring 400 to deform, thereby blocking part of the water flow area of ​​the water through hole 211, reducing the entire water flow area. The whole process realizes that the water flow area is large when the water flow rate is low, and the water flow area is small when the water flow rate is high, thereby achieving the purpose of controlling the flow rate.

[0034] In some embodiments of the present invention, sealing section 111 is located at the lower end of water inlet channel 110. Sealing section 111 has a tapered wall surface that gradually slopes toward the center from bottom to top. It should be noted that the "center" in "sloping toward the center" refers to the centerline of water inlet channel 110. The tapered wall surface of sealing section 111 facilitates ensuring sealing strength.

[0035] In some embodiments of the present invention, the piston member 200 further includes a boss 220, which is fixedly mounted in the middle portion of the upper end surface of the piston portion 210. Two or more latching protrusions 230 are circumferentially spaced apart on the outer periphery of the upper portion of the boss 220. The first sealing ring 400 is sleeved around the outer periphery of the boss 220 and is latched between the latching protrusions 230 and the piston portion 210. The latching protrusions 230 are used to latch the first sealing ring 400, preventing it from falling out and allowing it to move up and down with the piston member 200. The large spacing between the latching protrusions 230 and the relatively small size of the latching protrusions 230 can reduce the effect of the latching protrusions 230 on the water pressure acting on the first sealing ring 400, thereby increasing the area of ​​the first sealing ring 400 exposed to the water pressure, resulting in more significant deformation and better performance.

[0036] In some embodiments of the present invention, the piston portion 210 is disc-shaped, and the water holes 211 are distributed in a circular array on the piston portion 210 with the boss 220 as the center. The water holes 211 are evenly distributed on the piston portion 210 to ensure that the piston portion 210 is evenly stressed.

[0037] In some embodiments of the present invention, a base 500 is further included. The base 500 includes an annular housing 510, a positioning post 520, and a plurality of spokes 530. The positioning post 520 is located in the middle of the annular housing 510. The spokes 530 are fixedly connected to the annular housing 510 and the positioning post 520. The annular housing 510 is connected to the lower end of the housing 100. The elastic member 300 is a spring. The upper end of the spring abuts the piston portion 210, and the lower end of the spring is sleeved on the positioning post 520. A water outlet channel is formed between the spokes 530. Due to the action of water pressure, the spring is compressed, the piston portion 210 moves downward, and finally abuts the upper end surface of the positioning post 520. Water flows through the water through-hole 211 and the water outlet channel, achieving water flow.

[0038] In some embodiments of the present invention, a positioning hole 521 is defined in the positioning post 520, and the piston member 200 further includes a piston rod 240, which is fixed to the lower end surface of the piston portion 210 and slidably assembled within the positioning hole 521. The sliding engagement between the piston rod 240 and the positioning hole 521 allows the piston member 200 to move axially along the positioning hole 521, ensuring that the piston member 200 can move within a prescribed trajectory and preventing radial deviation or instability of the piston member 200 during movement.

[0039] In some embodiments of the present invention, a flange 511 is provided on the outer circumferential wall of the annular sleeve 510, and a groove is provided on the inner circumferential wall of the lower end of the housing 100. The housing 100 is sleeved onto the base 500 through the cooperation between the groove and the flange 511. The cooperation between the groove of the housing 100 and the flange 511 on the outer circumferential wall of the annular sleeve 510 can achieve a secure connection between the housing 100 and the base 500, preventing the housing 100 and the base 500 from loosening or falling off. The structural design of the flange 511 and the groove helps to simplify the assembly process of the housing 100 and the base 500. During installation, the housing 100 is simply inserted into the base 500 and pressed tightly together.

[0040] In some embodiments of the present invention, the outer circumferential wall of the piston portion 210 is clearance-fitted with the inner circumferential wall of the housing 100 .

[0041] In some embodiments of the present invention, a second sealing ring 600 is further included. An annular groove 130 is provided on the outer peripheral wall of the upper end of the housing 100 , and the second sealing ring 600 is embedded in the annular groove 130 .

[0042] A water outlet device includes the above-mentioned throttling one-way valve. Further, the water outlet device is a shower or a faucet.

[0043] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A throttling one-way valve, characterized in that: The invention comprises a housing (100), a piston member (200), an elastic member (300) and a first sealing ring (400). The housing (100) is provided with a water inlet channel (110) and a water passage cavity (120) which are connected from top to bottom. The inner peripheral wall of the water inlet channel (110) has a sealing section (111). The piston member (200) comprises a disc-shaped piston portion (210). The piston portion (210) can move up and down in the water passage cavity (120). The piston portion (210) is provided with a plurality of water passage holes (211). The first sealing ring (400) is provided with a plurality of water passage holes (211). The ring (400) is fixedly arranged on the upper end surface of the piston part (210). When the first sealing ring (400) is subjected to water pressure, it can be deformed and expanded radially outward to partially block the water flow area of ​​the water flow hole (211). The elastic member (300) is located below the piston part (210). Under the elastic force of the elastic member (300), the piston part (210) always maintains an upward movement trend. The upward movement of the piston part (210) can make the first sealing ring (400) abut against the sealing section (111) to block the water inlet channel (110).

2. The throttling check valve according to claim 1, characterized in that: The sealing section (111) is located at the lower end of the water inlet channel (110), and the sealing section (111) is a conical wall surface that gradually tilts toward the center from bottom to top.

3. The throttling check valve according to claim 1, characterized in that: The piston member (200) further comprises a boss (220), wherein the boss (220) is fixedly arranged at the middle portion of the upper end surface of the piston portion (210), and the outer periphery of the upper portion of the boss (220) is provided with two or more locking protrusions (230) spaced circumferentially, and the first sealing ring (400) is sleeved on the outer periphery of the boss (220) and is locked between the locking protrusions (230) and the piston portion (210).

4. The throttling check valve according to claim 3, characterized in that: The piston portion (210) is disc-shaped, and the water through holes (211) are distributed in a ring array on the piston portion (210) with the boss (220) as the center.

5. The throttling check valve according to claim 1, characterized in that: The invention also includes a base (500), wherein the base (500) includes an annular sleeve (510), a positioning column (520) and a plurality of spokes (530), wherein the positioning column (520) is located in the middle of the annular sleeve (510), and the spokes (530) are fixedly connected to the annular sleeve (510) and the positioning column (520), and the annular sleeve (510) is connected to the lower end of the housing (100). The elastic member (300) is a spring, wherein the upper end of the spring abuts against the piston portion (210), and the lower end of the spring is sleeved on the positioning column (520).

6. The throttling check valve according to claim 5, characterized in that: The positioning column (520) is provided with a positioning hole (521), and the piston member (200) further includes a piston rod (240), which is fixed to the lower end surface of the piston part (210) and can be slidably assembled in the positioning hole (521).

7. The throttling check valve according to claim 5, characterized in that: The outer peripheral wall of the annular sleeve (510) is provided with a flange (511), and the inner peripheral wall of the lower end of the shell (100) is provided with a groove, and the shell (100) is sleeved with the base (500) through the cooperation between the groove and the flange (511).

8. The throttling check valve according to claim 1, characterized in that: The outer peripheral wall of the piston portion (210) is loosely fitted with the inner peripheral wall of the housing (100).

9. The throttling check valve according to claim 1, characterized in that: It also includes a second sealing ring (600). An annular groove (130) is provided on the outer peripheral wall of the upper end of the housing (100). The second sealing ring (600) is embedded in the annular groove (130).

10. A water outlet device, characterized in that: The invention comprises the throttling one-way valve according to any one of claims 1 to 9.

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