Integrated check and flow limiting assembly and water inlet valve

Abstract

The utility model belongs to water inlet valve technical field, specifically disclose an integrated check flow limiting assembly and water inlet valve. The check flow limiting assembly includes check valve body, check valve cover, elastic flow limiting spare and flat check piece, and the valve body bottom week cloth water inlet hole, the valve cover is fixed in the top of valve body and is opened and is passed through a plurality of water outlet holes, elastic flow limiting spare is fixed in the bottom surface of check valve cover and is opposite water outlet hole, flat check piece is set up in the valve body internal cavity, and is located below elastic flow limiting spare, elastic flow limiting spare is configured as when water inlet pressure increases can expand outward, to reduce the effective flow area of water outlet hole. The utility model will check valve cover, elastic flow limiting spare, flat check piece and check valve body into indivisible whole module, make the assembly when automatic assembly as single component is directly loaded into the water inlet pipe, from the root, avoid split structure inherent alignment difficulty, rubber piece deformation and connection stability poor etc. Assembly problem, significantly improved production efficiency and product yield.

Description

Technical Field

[0001] This utility model belongs to the field of water inlet valve technology, and particularly relates to an integrated check valve and flow limiting component and water inlet valve. Background Technology

[0002] In the field of sanitary ware water supply technology, the inlet valve is a key component for achieving water flow control. To conserve water resources and reduce noise, existing inlet valves typically require components with flow limiting and backflow prevention functions. The flow limiting function aims to maintain a relatively stable water flow rate under different inlet water pressure conditions, while the backflow prevention function prevents water from flowing back, ensuring the safety and stability of the water supply system.

[0003] Chinese utility model patent CN221300206U, authorized patent publication number CN221300206U, discloses a flow limiting component and an inlet valve. (See attached document.) Figure 1 The system comprises two independent components: a check valve 1 and a flow restrictor 2. The bottom of the check valve 1 has a guide post 10, and the top of the flow restrictor 2 has a insertion hole 20. The two components are connected by inserting the guide post 10 of the check valve 1 into the insertion hole 20 of the flow restrictor 2. This flow restrictor assembly of the inlet valve improves deformation under high water pressure through the guiding constraint between the check valve and the flow restrictor, thereby stabilizing the water flow. However, this split structure has significant shortcomings in actual production assembly, especially in automated production where efficiency and consistency are paramount. Specifically, if the check valve and flow restrictor are pre-connected and then installed together as a whole into the inlet pipe of the inlet valve, the soft rubber flow restrictor is easily deformed by compression during the clamping and pushing process of the automated fixture. Meanwhile, to ensure proper assembly, the applied axial thrust may deform the plug hole of the flow restrictor, preventing it from fitting tightly with the guide post of the check valve. It may also cause the end face of the flow restrictor to detach from the end face of the check valve, ultimately compromising the stability of their connection, triggering equipment alarms, and severely impacting production yield. If the check valve and flow restrictor are inserted into the inlet pipe in batches, the challenge of proper alignment within the pipe arises. Friction generated on the inlet pipe wall during insertion may cause the plug hole to shift, preventing accurate alignment with the guide post, ultimately leading to assembly failure and product defects.

[0004] Furthermore, if manual assembly is used, not only will production efficiency be low, but the production rhythm will also be difficult to control uniformly due to differences in the skills of operators, and the pre-assembly operation time will fluctuate greatly, which will seriously restrict the efficiency of large-scale production and the level of cost control.

[0005] Therefore, there is an urgent need in this field for a structurally integrated check valve and inlet valve that can fundamentally avoid the difficulties of separate assembly, is suitable for automated production, and has stable performance. Utility Model Content

[0006] To overcome the problems existing in the background art, this utility model provides an integrated check valve and inlet valve, including a check valve body with multiple inlet holes circumferentially opened at its bottom; a check valve cover, fixedly installed on the top of the check valve body, with multiple outlet holes through the check valve cover; an elastic flow restrictor, made of elastic material, fixed to the bottom surface of the check valve cover and facing the outlet holes; and a flat check plate, slidably disposed in the internal cavity of the check valve body and located below the elastic flow restrictor; wherein, the elastic flow restrictor is configured to expand outward when the inlet water pressure increases, thereby reducing the effective flow area of ​​the outlet holes.

[0007] Furthermore, multiple water outlets are evenly distributed circumferentially along the check valve cover, and the elastic flow restrictor is an annular structure adapted to the circumferential distribution shape of the multiple water outlets.

[0008] Furthermore, a positioning post is protruding from the lower surface of the check valve cover, and an elastic flow limiting element is sleeved on the positioning post.

[0009] Furthermore, a guide post extends coaxially below the positioning post, and a flat stop piece is slidably sleeved on the guide post.

[0010] Furthermore, the flat check valve is made of rubber material, with its outer edge close to the inner wall of the check valve body. The flat check valve is configured so that its outer edge can be folded upward when water flows in, thereby forming a water passage gap for water to flow through.

[0011] Furthermore, the bottom surface of the check valve cover is provided with an annular groove, the bottom of which is connected to the outlet hole, and the elastic flow limiting element is accommodated in the annular groove.

[0012] Furthermore, multiple flow-limiting teeth are protruding on the radial outer wall of the water outlet, and a water flow channel is formed between adjacent flow-limiting teeth; when the water pressure increases, the elastic flow-limiting element expands and deforms, so that the elastic flow-limiting element is partially embedded in the water flow channel to reduce the flow space.

[0013] Furthermore, a positioning groove is provided on the inner surface of the bottom of the check valve body, and the end of the guide column is inserted and positioned in the positioning groove.

[0014] Furthermore, a reinforcing member is provided in the center of the upper surface of the flat stop plate, and the reinforcing member has a through hole that slides with the guide post.

[0015] This utility model also discloses a water inlet valve, including a water inlet pipe and an integrated check flow limiting component as described in any of the above, wherein the integrated check flow limiting component is fixedly disposed inside the water inlet pipe.

[0016] Compared with the prior art, the integrated check valve and current limiting component of this utility model has the following advantages:

[0017] (1) This utility model integrates the check valve cover, elastic flow limiting component, flat check plate and check valve body into an inseparable whole module, so that the component can be directly installed into the water inlet pipe as a single part during automated assembly, thereby avoiding the assembly problems inherent in the split structure, such as alignment difficulties, rubber deformation and poor connection stability, and significantly improving production efficiency and product yield.

[0018] (2) This utility model sets an annular groove, flow limiting teeth and annular elastic flow limiting element on the bottom surface of the check valve cover to form a flow limiting structure. It can generate continuous expansion deformation according to the inlet water pressure and gradually squeeze into the water flow channel formed by the flow limiting teeth. It realizes adaptive adjustment of the flow area, thereby stabilizing the flow rate under high water pressure and effectively reducing noise. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a current-limiting component installed in an inlet pipe in the prior art.

[0021] Figure 2 This is a schematic diagram of the overall structure of the integrated anti-reverse current limiting component of this utility model;

[0022] Figure 3 This is an exploded structural diagram of the integrated backflow preventer and current limiting component of this utility model;

[0023] Figure 4 This utility model is an integrated anti-reverse current limiting component. Figure 2 A schematic diagram of the side sectional structure;

[0024] Figure 5 This is a three-dimensional structural diagram of the check valve cover in the integrated check valve limiting assembly of this utility model;

[0025] Figure 6 This is a cross-sectional structural diagram of the integrated backflow prevention and flow restriction component of this utility model installed on the water inlet pipe;

[0026] Wherein: 1-Check valve, 10-Limiting post, 2-Flow restrictor, 20-Plug-in hole, 3-Check valve body, 31-Water inlet, 32-Internal cavity, 33-Positioning groove, 4-Check valve cover, 41-Water outlet, 410-Radial outer wall, 411-Flow restricting tooth, 412-Water flow channel, 42-Positioning post, 43-Guide post, 44-Annular groove, 5-Elastic flow restrictor, 6-Flat check plate, 61-Reinforcing member, 62-Through hole, 7-Water inlet pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] The following is combined with Figures 2 to 6 The present invention will be described in detail with specific embodiments.

[0029] This utility model provides an integrated check valve and inlet valve, including a check valve body 3 with multiple inlet holes 31 circumferentially opened at its bottom; a check valve cover 4, fixedly installed on the top of the check valve body 3, with multiple outlet holes 41 through it; an elastic flow restrictor 5, made of elastic material, fixed to the bottom surface of the check valve cover 4 and facing the outlet holes 41; and a flat check plate 6, slidably disposed in the internal cavity 32 of the check valve body 3 and located below the elastic flow restrictor 5; wherein, the elastic flow restrictor 5 is configured to expand outward when the inlet water pressure increases, thereby reducing the effective flow area of ​​the outlet holes 41.

[0030] In some preferred embodiments, see Figures 2 to 3 The check valve body 3 is generally cylindrical, with six inlet holes 31 circumferentially opened at the bottom for introducing external water flow into the internal cavity 32 of the valve body. The check valve body 3 and check valve cover 4 are preferably made of ABS engineering plastic, both molded by injection molding. ABS material possesses good structural strength, dimensional stability, and corrosion resistance. The check valve cover 4 is fixedly installed on the top of the check valve body 3 by ultrasonic welding, forming a strong sealing connection. The elastic flow restrictor 5 is made of an elastic polymer material. This application does not limit the specific material of the elastic flow restrictor 5; any material possessing the required elasticity and durability is suitable for this embodiment. Those skilled in the art can select according to actual working conditions. Its shape is designed to adapt to the distribution shape of the multiple outlet holes 41 to ensure effective coverage and adjustment of the flow area of ​​all outlet holes 41.

[0031] During operation, water enters through the inlet hole 31, pushing the flat check valve 6 upwards. This allows the water to pass through the gap between the outer edge of the flat check valve 6 and the inner wall of the check valve body 3, entering the cavity and flowing towards the outlet hole 41. Under low inlet pressure, the elastic flow restrictor 5 does not undergo significant elastic deformation, allowing water to flow smoothly through the outlet hole 41. When the inlet pressure increases, the water flow forces the elastic flow restrictor 5 to undergo outward elastic deformation, thereby reducing the effective flow area of ​​the outlet hole 41 and achieving adaptive flow stabilization. When the water supply stops, the water pressure disappears, and the flat check valve 6 slides back to its original position under gravity. Its lower surface covers the inlet hole 31, reliably cutting off the water path and preventing backflow.

[0032] This utility model integrates the check valve cover 4, the elastic flow restrictor 5, the flat check plate 6, and the check valve body 3 into an inseparable whole module, so that the component can be directly installed into the water inlet pipe 7 as a single part during automated assembly. This avoids the assembly problems inherent in split structures, such as alignment difficulties, rubber deformation, and poor connection stability, and significantly improves production efficiency and product yield.

[0033] For details, please refer to Figures 2 to 3 , Figure 5 In some embodiments, multiple outlet holes 41 are evenly distributed circumferentially along the check valve cover 4, and the elastic flow restrictor 5 is an annular structure adapted to the circumferential distribution shape of the multiple outlet holes 41. In this embodiment, the number of outlet holes 41 is preferably six, but it should be understood that this number is only illustrative and not limiting, and those skilled in the art can make adaptive adjustments according to actual flow requirements. The cross-sectional shape of the elastic flow restrictor 5 is preferably circular. This circular cross-section design allows it to produce more uniform and continuous radial deformation when subjected to water pressure, which is beneficial for achieving a smooth flow regulation process, while avoiding stress concentration and extending service life. The annular elastic flow restrictor 5 can simultaneously cover and act on all circumferentially distributed outlet holes 41, ensuring the consistency and stability of flow regulation.

[0034] For details, please refer to Figures 3 to 5 In some embodiments, a positioning post 42 protrudes from the lower surface of the check valve cover 4, and the elastic flow restrictor 5 is sleeved on the positioning post 42. The positioning post 42 ensures precise radial positioning of the elastic flow restrictor 5, effectively preventing displacement or deflection due to water flow impact during operation, thus ensuring the stability and consistency of its deformation and reset actions. Simultaneously, this positioning structure provides a clear benchmark for automated assembly, facilitating the rapid and accurate installation of the elastic flow restrictor 5 by the robotic arm, further improving assembly reliability and production efficiency.

[0035] For details, please refer to Figures 3 to 5In some embodiments, a guide post 43 extends coaxially below the positioning post 42, and the flat check valve 6 is slidably fitted onto the guide post 43. The guide post 43 and the positioning post 42 are coaxially integrated, providing precise axial guidance for the up-and-down sliding of the flat check valve 6. This structure ensures that the flat check valve 6 maintains a stable movement trajectory during opening and closing, effectively preventing radial displacement within the valve body cavity 32. The guide post 43 not only improves the reliability of the flat check valve 6's movement but also ensures the sealing accuracy between its outer edge and the inner wall of the check valve body 3, thereby significantly improving the stability and service life of the check valve function.

[0036] For details, please refer to Figures 2 to 4 In some embodiments, the flat check valve 6 is made of rubber material, with its outer edge close to the inner wall of the check valve body 3. The flat check valve 6 is configured such that its outer edge can fold upward when water flows in, thereby forming a water passage gap for water to pass through. When the water flow stops, the outer edge of the flat check valve 6 rebounds downward due to its own elasticity after the water pressure disappears, returning to its initial state close to the inner wall of the check valve body 3. During operation, the flexible elasticity of the rubber material is used to achieve the folding and rebound of the outer edge, which not only ensures smooth water flow but also quickly blocks the water path when the flow is interrupted due to the disappearance of water pressure and gravity, thus achieving a reliable check function.

[0037] For details, please refer to Figures 4 to 5 In some embodiments, the bottom surface of the check valve cover 4 is provided with an annular groove 44, the bottom of which is connected to the outlet hole 41, and the elastic flow restrictor 5 is accommodated within the annular groove 44. This application provides a stable spatial constraint for the deformation of the elastic flow restrictor 5 through the annular groove 44, ensuring the stability and directional controllability of its deformation process. For details, please refer to... Figures 2 to 3 , Figure 5 In some embodiments, a plurality of flow-limiting teeth 411 are protruding on the radially outer sidewall 410 of the water outlet 41, and a water flow channel 412 is formed between adjacent flow-limiting teeth 411. When the water pressure increases, the elastic flow-limiting member 5 expands and deforms, so that the elastic flow-limiting member 5 is partially embedded in the water flow channel 412 to reduce the flow space. This application divides the water flow channel into a plurality of fine water flow channels 412 by setting flow-limiting teeth 411, so that the elastic flow-limiting member 5 can achieve gradual adjustment of water flow through partial embedding, effectively avoiding the turbulence and noise generated by traditional rigid throttling.

[0038] For details, please refer to Figures 3 to 4 In some embodiments, the bottom inner surface of the check valve body 3 is provided with a positioning groove 33, and the end of the guide post 43 is inserted and positioned in the positioning groove 33. The positioning groove 33 provides precise positioning and stable bottom support for the end of the guide post 43, ensuring that the flat check plate 6 guided by the guide post 43 always maintains an accurate axial trajectory during movement.

[0039] For details, please refer to Figures 3 to 4 In some embodiments, a reinforcing member 61 is provided centrally on the upper surface of the flat anti-rebound plate 6, and the reinforcing member 61 has a through hole 62 that slides with the guide post 43. The setting of the reinforcing member 61 significantly enhances the rigidity and structural strength of the flat anti-rebound plate 6 in the sliding engagement area of ​​the guide post 43, and effectively prevents deformation and wear caused by long-term reciprocating motion or water flow impact.

[0040] This utility model also discloses a water inlet valve, including a water inlet pipe 7 and an integrated check flow limiting component as described in any of the above embodiments, wherein the integrated check flow limiting component is fixedly disposed inside the water inlet pipe 7. The water inlet valve provided in this application adopts all the technical solutions of the integrated check flow limiting component in the above embodiments, and therefore has at least all the beneficial effects brought about by the technical solutions of the above embodiments of the integrated check flow limiting component, which will not be described in detail here.

[0041] The working principle of the inlet valve equipped with this integrated check and flow limiting component is as follows:

[0042] (1) Under the initial or low inlet pressure, water flows in from the inlet pipe 7, pushing the flat check plate 6 to slide upward along the guide post 43. Its outer edge folds upward under the action of water flow, forming a water passage gap with the inner wall of the check valve body 3. The water then enters the internal cavity 32 of the check valve body 3 and acts on the elastic flow limiting element 5. At this time, the water pressure is low, and the water flow can pass smoothly through the outlet hole 41 to maintain normal flow.

[0043] (2) When the inlet water pressure increases, the high-pressure water flow maintains the open state of the check valve 6 and further forces the elastic flow restrictor 5 to expand and deform. The elastic flow restrictor 5 is constrained by the annular groove 44, and its deformed part is squeezed into the water passage 412 formed by the flow restrictor teeth 411, thereby dynamically reducing the effective flow area, restricting the excessive water flow, achieving stable flow rate, and effectively suppressing noise.

[0044] (3) When the water inlet stops, the water pressure disappears, and the flat check plate 6 slides down along the guide column 43 under the action of gravity. Its lower surface covers the water inlet hole 31, and at the same time, the outer edge quickly rebounds to the position that is initially close to the inner wall of the check valve body 3, thereby cutting off the water path and reliably preventing backflow. Meanwhile, the elastic flow limiting element 5 returns to its original state by its own elasticity, preparing for the next working cycle.

[0045] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. An integrated backflow preventer and current limiter component, characterized in that, include: The check valve body has multiple water inlet holes circumferentially opened at its bottom; A check valve cover is fixedly installed on the top of the check valve body, and multiple water outlet holes are provided through the check valve cover; An elastic flow restrictor, made of elastic material, is fixed to the bottom surface of the check valve cover and faces the water outlet. The flat check valve plate is slidably disposed in the internal cavity of the check valve body and located below the elastic flow restrictor; The elastic flow restrictor is configured to expand outward when the inlet water pressure increases, thereby reducing the effective flow area of ​​the outlet hole.

2. The integrated backflow preventer and current limiter component according to claim 1, characterized in that, The plurality of water outlet holes are evenly distributed along the circumference of the check valve cover, and the elastic flow limiting element is an annular structure adapted to the circumferential distribution shape of the plurality of water outlet holes.

3. The integrated check-back current limiting component according to claim 2, characterized in that, The lower surface of the check valve cover is provided with a positioning post, and the elastic flow limiting element is sleeved on the positioning post.

4. The integrated check-back current limiting component according to claim 3, characterized in that, A guide post extends coaxially below the positioning post, and the flat anti-return piece is slidably sleeved on the guide post.

5. The integrated backflow preventer and current limiter component according to claim 4, characterized in that, The flat check valve is made of rubber material, and its outer edge is close to the inner wall of the check valve body. The flat check valve is configured such that its outer edge can be folded upward when water flows in, thereby forming a water passage gap for water to flow through.

6. The integrated backflow preventer and current limiter component according to claim 2, characterized in that, The bottom surface of the check valve cover is provided with an annular groove, the bottom of the annular groove is connected to the water outlet, and the elastic flow limiting element is accommodated in the annular groove.

7. The integrated check-back current limiting component according to claim 4, characterized in that, Multiple flow-limiting teeth are protruding on the radial outer wall of the water outlet, and a water flow channel is formed between adjacent flow-limiting teeth. When the water pressure increases, the elastic flow-limiting element expands and deforms, so that the elastic flow-limiting element is partially embedded in the water flow channel to reduce the flow space.

8. The integrated check-back current limiting component according to claim 4, characterized in that, The bottom inner surface of the check valve body is provided with a positioning groove, and the end of the guide post is inserted and positioned in the positioning groove.

9. The integrated backflow preventer and current limiter component according to claim 4, characterized in that, The upper surface of the flat check sheet is provided with a reinforcing member in the center, and the reinforcing member is provided with a through hole that slides with the guide post.

10. A water inlet valve, characterized in that, It includes an inlet pipe and an integrated check flow limiting component as described in any one of claims 1 to 9, wherein the integrated check flow limiting component is fixedly disposed inside the inlet pipe.

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