Improved back pressure valve water sealing valve plate structure and application of water tank inlet valve

Abstract

The utility model discloses a back pressure valve water seal valve piece improvement structure is set between water inlet cavity and back pressure cavity, and the opening and closing of water outlet passage are controlled through the pressure difference drive between water inlet cavity and back pressure cavity, including valve core and diaphragm, valve core is equipped with the convex post of extending towards water inlet cavity, and the convex post forms the flow guide channel, and the flow guide channel is connected with water inlet cavity and back pressure cavity, the central region of diaphragm is fixed on valve core, and the outer periphery edge of diaphragm is sealedly connected with valve body, and diaphragm is equipped with the through -hole of the convex post sleeve joint, valve core is made of hard material, and diaphragm is made of flexible material, after the pressure difference drive, the central region of diaphragm and valve core synchronous displacement, and the deformation part between the outer periphery edge and central region of diaphragm deforms, make the convex post retractable in the through -hole, to make the inside wall of through -hole can scrape the flow guide channel entrance. Can remove the silt at the flow guide channel entrance, realizes self -cleaning, guarantees that water seal valve piece can normally open or close water outlet passage.

Description

Technical Field

[0001] This utility model relates to the technical field of treadmill testing, and in particular to an improved structure of a back pressure valve sealing valve plate. Background Technology

[0002] In sealing valves driven by the pressure difference between the inlet chamber and the back pressure chamber, conventional techniques in the field involve installing a filter screen or filter at the inlet of the inlet chamber to prevent silt and impurities from interfering with the valve core's operation. Although this can block impurities, as impurities continue to accumulate, the inlet of the inlet chamber will gradually become blocked, leading to a continuous increase in water flow resistance. In severe cases, this will directly cause the valve to fail to open or close normally, while also increasing the maintenance burden on users who regularly clean the filter. Utility Model Content

[0003] The purpose of this utility model is to provide an improved structure for a back pressure valve sealing plate, and the technical problem to be solved is to provide a sealing plate structure that can achieve self-cleaning.

[0004] To achieve the above objectives, the solution of this utility model is: an improved structure of a back pressure valve sealing valve plate, which is set between the inlet chamber and the back pressure chamber, and controls the opening and closing of the outlet channel by the pressure difference between the inlet chamber and the back pressure chamber, including a valve core and a diaphragm. The valve core is provided with a protrusion extending toward the water inlet chamber, which forms a flow guide channel that connects the water inlet chamber and the back pressure chamber. The central area of ​​the diaphragm is fixed on the valve core, and the outer periphery of the diaphragm is sealed to the valve body. The diaphragm is provided with a through hole for the protrusion to be sleeved. The valve core is made of a rigid material, and the diaphragm is made of a flexible material. After being driven by the pressure difference, the central region of the diaphragm is displaced synchronously with the valve core. The deformation part between the outer peripheral edge of the diaphragm and the central region deforms, causing the protrusion to extend and retract within the through hole, so that the inner sidewall of the through hole can scrape the inlet of the guide channel.

[0005] Furthermore, the diaphragm is made of rubber material, and its deformable part is an annular protrusion surrounding the central region.

[0006] Furthermore, the valve core includes a mounting post and a valve core body. The mounting post extends outward from one end of the valve core body and is radially inclined inward toward the side opposite to the valve core body. A necked portion is formed between the valve core body and the mounting post. A mounting hole is formed in the central region of the diaphragm for the mounting post to pass through. After the mounting post passes through the mounting hole, the inner edge of the mounting hole of the diaphragm is embedded in the necked portion, so that the central region of the diaphragm is fixed on the valve core.

[0007] Furthermore, the diaphragm forms a mounting groove on the side facing the back pressure chamber to accommodate the valve core body. After the mounting post passes through the mounting hole, the valve core body is fitted into the mounting groove.

[0008] Furthermore, the outer peripheral edge of the valve core body protrudes outward to form a flange, which abuts against the inner side wall of the mounting groove, creating a water passage gap between the mounting groove and the outer side wall of the valve core body. The flange and the protruding post are positioned to allow the flow channel to connect with the back pressure chamber through the water gap.

[0009] Furthermore, the end of the flow channel protrudes slightly from the diaphragm surface or is flush with the diaphragm surface.

[0010] Furthermore, the cross-section of the convex pillar has a U-shaped structure.

[0011] This utility model also provides a water tank inlet valve using the improved structure of the back pressure valve sealing valve plate described above, including the valve body and the float assembly. A valve cover is detachably installed on the valve body. An inlet channel and an outlet channel are formed inside the valve body. The valve core is located at the inlet of the outlet channel. A diaphragm is installed inside the valve body, separating the valve body into the inlet chamber and the back pressure chamber. The inlet chamber surrounds the outer periphery of the outlet channel and communicates with the inlet channel. The back pressure chamber is located on the side of the diaphragm away from the inlet chamber. A pressure relief hole is formed through the side wall of the back pressure chamber. A plug corresponding to the position of the pressure relief hole is provided on the float assembly. The plug is used to open or block the pressure relief hole.

[0012] Furthermore, the float assembly is connected to a first elastic element, which is used to elastically drive the plug away from the pressure relief hole. After the water level in the toilet tank rises, the buoyancy overcomes the elastic force of the first elastic element to drive the plug to seal the pressure relief hole.

[0013] Furthermore, a second elastic element is provided inside the back pressure chamber, which is used to elastically drive the valve core to block the water outlet channel.

[0014] The beneficial effects of this utility model after adopting the above solution are as follows: The valve core is provided with a protrusion extending towards the water inlet chamber, and a flow guiding channel is formed on the protrusion. The flow guiding channel connects the water inlet chamber and the back pressure chamber. The through hole of the diaphragm is sleeved on the protrusion. The central area of ​​the diaphragm is fixed on the valve core, and the outer peripheral edge of the diaphragm is sealed to the valve body. Since the diaphragm is made of flexible material and the valve core is made of rigid material, the area between the outer peripheral edge of the diaphragm and the central area is a deformation part. Driven by the pressure difference between the water inlet chamber and the back pressure chamber, the central area of ​​the diaphragm moves synchronously with the valve core, while the deformation part moves asynchronously with the valve core and deforms, causing the protrusion and the through hole to slide relative to each other. The protrusion and the through hole expand and contract, causing the inner sidewall of the through hole to scrape the outer peripheral wall of the protrusion and scrape past the inlet of the flow guiding channel, so that the mud and sand particles larger than the inlet are scraped away, realizing the self-cleaning function and ensuring that the sealing valve plate can open or close the water outlet channel normally. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the water tank inlet valve of this utility model.

[0016] Figure 2This is a schematic diagram of the structure of the diaphragm of this utility model.

[0017] Figure 3 This is a schematic diagram of the valve body of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the diaphragm and valve core of this utility model. Figure 1 .

[0019] Figure 5 This is a schematic diagram of the structure of the diaphragm and valve core of this utility model. Figure 2 .

[0020] Figure 6 This is a three-dimensional structural diagram of the water tank inlet valve of this utility model.

[0021] Figure 7 This is an exploded view of the water tank inlet valve of this utility model. Figure 1 .

[0022] Figure 8 This is an exploded view of the water tank inlet valve of this utility model. Figure 2 .

[0023] Label Explanation: 100-Inlet chamber, 200-Back pressure chamber, 300-Outlet channel, 400-Valve body, 500-Float assembly, 600-Inlet channel, 1-Valve core, 2-Diaphragm, 3-Protrusion, 4-Flow guide channel, 5-Mounting post, 6-Valve core body, 7-Neck section, 8-Flange, 9-First elastic element, 10-Second elastic element, 11-Annular sealing ring, 12-Valve cover, 21-Through hole, 22-Deformation part, 23-Mounting groove, 24-Mounting hole, 25-Sealing part, 51-Rib, 201-Pressure relief hole, 501-Plug. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "middle", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] like Figure 1-8As shown, this utility model provides an improved structure for a back pressure valve sealing valve plate, which is disposed between the inlet chamber 100 and the back pressure chamber 200. The opening and closing of the outlet channel 300 is controlled by the pressure difference between the inlet chamber 100 and the back pressure chamber 200. It includes a valve core 1 and a diaphragm 2. The valve core 1 has a protrusion 3 extending towards the inlet chamber 100, forming a guide channel 4. The guide channel 4 extends axially and connects the inlet chamber 100 and the back pressure chamber 200. The diaphragm 2 includes a sealing part 25 and a deformation part 22. The deformation part 22 is located between the outer peripheral edge of the diaphragm 2 and the sealing part 25, surrounding the outer periphery of the sealing part 25. The central area of ​​the sealing part 25 is fixed to the valve core 1 to block the outlet channel 300. The outer peripheral edge of the diaphragm 2 is sealed to the valve body 400. The diaphragm 2 has a through hole 21 for the protrusion 3 to be fitted, allowing passage through... A hole 21 is formed in the deformation part 22. The diaphragm 2 is made of a flexible material, and the valve core 1 is made of a rigid material. Driven by the pressure difference between the water inlet chamber 100 and the back pressure chamber 200, the central area of ​​the diaphragm 2 and the valve core 1 are displaced synchronously. The deformation part 22 of the diaphragm 2 deforms. The deformation part 22 and the valve core 1 are not displaced synchronously, so that the protrusion 3 and the through hole 21 of the diaphragm 2 slide relative to each other. The protrusion 3 extends and retracts in the through hole 21 of the diaphragm 2, so that the inner sidewall of the through hole 21 scrapes the outer peripheral wall of the protrusion 3 and scrapes past the end of the guide channel 4 to clean the inlet of the guide channel 4. The inlet of the guide channel 4 can be located at its end or at its side. When the inner sidewall of the through hole 21 scrapes the outer peripheral wall of the protrusion 3, it can scrape away mud or other impurities larger than the inlet of the guide channel 4, avoiding the accumulation of mud and other impurities.

[0027] In this specific embodiment, the diaphragm 2 is made of rubber material. Specifically, the valve core 1 can be made of ceramic, rigid plastic or metal material. The diaphragm 2 is made of nitrile rubber or thermoplastic polyurethane elastomer, etc., without specific limitations. Preferably, the valve core 1 is made of rigid plastic material, such as polypropylene (PP) or polyoxymethylene (POM).

[0028] Preferably, the deformable part 22 is an annular protrusion surrounding the central region, which not only improves the fatigue resistance of the diaphragm 2 after multiple expansions and contractions and extends its service life, but also provides a greater amount of expansion and contraction, so that the valve core 1 can generate a greater displacement under the same pressure difference, and the scraping displacement is greater.

[0029] Preferably, the cross-section of the protruding column 3 is U-shaped to increase the water flow area. Of course, it can also be other structures, such as square, circular, etc., without specific limitations.

[0030] Key points combined Figure 3As shown, the valve core 1 includes a mounting post 5 and a valve core body 6. The mounting post 5 extends outward from one end of the valve core body 6 and is radially inclined inward toward the side opposite to the valve core body 6. Specifically, the mounting post 5 includes multiple ribs 51 arranged in a ring array. Of course, in other embodiments, the mounting post 5 and the valve core body 6 can also be combined into a T-shaped structure, with a necked portion 7 formed between the valve core body 6 and the mounting post 5. The outer diameter of the necked portion 7 is smaller than that of the mounting post 5 and the valve core body 6, forming an annular groove structure. Further details are provided. Figure 2 As shown, the diaphragm 2 has a mounting groove 23 on the side facing the back pressure chamber 200 to accommodate the valve core body 6. A mounting hole 24 for the mounting post 5 to pass through is formed in its central area. During assembly, after the mounting post 5 passes through the mounting hole 24, the inner edge of the mounting hole 24 of the diaphragm 2 is embedded in the necking portion 7, fixing the central area of ​​the diaphragm 2 onto the valve core 1. The valve core body 6 is fitted into the mounting groove 23. The valve core body 6 and the mounting groove 23 are not fixed together; they are connected by a fitted connection. When the valve core 1 is displaced, the deformable portion 22 of the diaphragm 2 deforms, creating a gap between the valve core body 6 and the mounting groove 23 (e.g., ...). Figure 5 As shown), the protrusion 3 and the through hole 21 are relatively displaced, which allows the inner wall of the through hole 21 to scrape the outer peripheral wall of the protrusion 3. In addition, the through hole 21 penetrates the bottom wall of the mounting groove 23. The protrusion 3 is formed on the valve core body 6. When the valve core body 6 is inserted into the mounting groove 23, the protrusion 3 passes through the through hole 21 and is exposed in the water inlet chamber 100. The guide channel 4 of the protrusion 3 can directly extend to the back pressure chamber 200 and communicate with the back pressure chamber 200.

[0031] In this specific embodiment, the outer peripheral edge of the valve core body 6 protrudes outward to form a flange 8. The flange 8 abuts against the inner sidewall of the mounting groove 23, so that a water passage gap is formed between the inner sidewall of the mounting groove 23 and the valve core body 6. The flange 8 corresponds to the position of the protruding post 3, so that the guide groove 31 on the protruding post 3 is connected to the back pressure chamber 200 through the water gap.

[0032] In this specific embodiment, the water outlet channel 300 extends longitudinally, and the valve core 1 is slidably disposed on the top side of the water outlet channel 300. After the valve core 1 slides upward, it drives the diaphragm 2 to move upward, opening the water outlet channel 300. After the valve core 1 slides downward, it drives the diaphragm 2 to move downward, closing the water outlet channel 300. Of course, in other embodiments, the water outlet channel 300 can also extend laterally, and the valve core 1 can be slid laterally, which can also realize the opening or closing of the water outlet channel 300. There is no specific limitation.

[0033] Preferably, the protrusion 3 is integrally formed on the valve core 1. Specifically, after the protrusion 3 passes through the through hole 21 of the diaphragm 2, the inlet of the flow channel 4 of the protrusion 3 is flush with the surface of the diaphragm 2, or the inlet of the flow channel 4 protrudes slightly from the surface of the diaphragm 2 (e.g., Figure 4As shown), when driven by the pressure difference, the diaphragm 2 can scrape the outer peripheral wall of the end of the protrusion 3, thereby cleaning the inlet of the guide channel 4 (as shown). Figure 5 (As shown).

[0034] Key points combined Figure 6 As shown, this utility model also provides a water tank inlet valve using the improved structure of the back pressure valve sealing valve plate described above, including a valve body 400 and a float assembly 500. The valve body 400 has a laterally extending inlet channel 600 connected to an external water source, and a longitudinally extending outlet channel 300. A valve core 1 is slidably mounted at the top of the outlet channel 300. The central area of ​​a diaphragm 2 is fixed to the valve core 1, and the outer periphery of the diaphragm 2 is sealed to the inner cavity of the valve body 400. After the diaphragm 2 is installed in the valve body 400, it divides the inner cavity of the valve body 400 into two chambers: a lower inlet chamber 100 and an upper back pressure chamber 200. The inlet chamber 100 surrounds the outer periphery of the outlet channel 300 and is connected to the inlet channel 600. The back pressure chamber 200 is located on the side of the diaphragm 2 facing away from the inlet chamber 100. Figure 7 As shown, the valve body 400 has an opening on its top side and also includes an annular sealing ring 11 and a valve cover 12. The valve cover 12 is detachably installed on the opening on the top side of the valve body 400 to seal the opening of the valve body 400. Specifically, the opening is located on the top side of the back pressure chamber 200, and the annular sealing ring 11 is disposed on the opening to form a water seal; Figure 8 As shown, a pressure relief hole 201 is formed through the side wall of the back pressure chamber 200. The float assembly 500 is any existing component capable of generating buoyancy in water, which rises and falls with the water level. In this specific embodiment, the float assembly 500 is a float ball, which is pivotally connected to the valve body 400 through the valve stem and can swing up and down. When the water outlet channel 300 fills the toilet tank with water, the float ball rises when the water level rises, causing the valve stem to swing up. When the toilet tank drains water, the water level drops, the float ball drops, causing the valve stem to swing down. The float assembly 500 is provided with a plug 501 corresponding to the position of the pressure relief hole 201. The plug 501 is connected to a first elastic member 9. The first elastic member 9 is used to elastically drive the plug 501 away from the pressure relief hole 201. After the water level in the toilet tank rises, the buoyancy overcomes the elasticity of the first elastic member 9 to drive the plug 501 to seal the pressure relief hole 201. Key points combined Figure 1 As shown, a second elastic element 10 is provided in the back pressure chamber 200. The second elastic element 10 is used to elastically drive the valve core 1 to block the water outlet channel 300. Specifically, one end of the second elastic element 10 abuts against the valve cover 12, and the other end abuts against the valve core body 6 of the valve core 1.

[0035] In this specific embodiment, the first elastic element 9 and the second elastic element 10 are preferably compression springs, but they can also be sheet springs or other types, without specific limitations.

[0036] Water inlet process of the toilet tank inlet valve: The water level in the toilet tank is low, the pressure relief hole 201 of the back pressure chamber 200 is open, communicating with the atmosphere, water enters through the inlet channel 600, and the water pressure in the inlet chamber 100 pushes the valve core 1, compressing the second elastic element 10, causing the valve core 1 to move the central area of ​​the diaphragm 2 upward, opening the outlet channel 300, and water flows into the toilet tank from the outlet channel 300. The deformation part 22 of the diaphragm 2 and the valve core 1 are not synchronized in displacement, the displacement speed of the valve core 1 is faster, and the diaphragm 2 scrapes against the outer part of the protrusion 3. When the water pressure changes, the diaphragm 2 deforms to different degrees, which can scrape different positions on the outer peripheral wall of the protrusion 3. As the water level in the toilet tank rises, until the buoyancy of the float assembly 500 is sufficient to overcome the elastic force of the first elastic element 9, the plug 501 is driven to block the pressure relief hole 201, the pressure in the back pressure chamber 200 rises, and with the elastic force of the second elastic element 10, it pushes the valve core 1 downward, causing the valve core 1 to move the central area of ​​the diaphragm 2 downward, blocking the water outlet channel 300, and the diaphragm 2 scrapes the outer peripheral wall of the protrusion 3.

[0037] The above description is only a preferred embodiment of this utility model and is not a limitation on the design of this case. All equivalent changes made based on the key design of this case shall fall within the protection scope of this case.

Claims

1. An improved structure for a back pressure valve sealing plate, disposed between an inlet chamber (100) and a back pressure chamber (200), wherein the opening and closing of the outlet channel (300) is controlled by the pressure difference between the inlet chamber (100) and the back pressure chamber (200), characterized in that, Includes valve core (1) and diaphragm (2); The valve core (1) is provided with a protrusion (3) extending toward the water inlet chamber (100), the protrusion (3) forming a flow guide channel (4), the flow guide channel (4) connecting the water inlet chamber (100) and the back pressure chamber (200). The central area of ​​the diaphragm (2) is fixed on the valve core (1), and the outer periphery of the diaphragm (2) is sealed to the valve body (400). The diaphragm (2) is provided with a through hole (21) for the protrusion (3) to be sleeved. The valve core (1) is made of a hard material and the diaphragm (2) is made of a flexible material. After being driven by the pressure difference, the central area of ​​the diaphragm (2) and the valve core (1) are displaced synchronously. The deformation part (22) between the outer peripheral edge of the diaphragm (2) and the central area is deformed, so that the protrusion (3) extends and retracts in the through hole (21) so that the inner sidewall of the through hole (21) can scrape the inlet of the guide channel (4).

2. The improved structure of the back pressure valve sealing valve plate as described in claim 1, characterized in that: The diaphragm (2) is made of rubber material, and its deformable part (22) is an annular protrusion surrounding the central region.

3. The improved structure of the back pressure valve sealing valve plate as described in claim 1, characterized in that: The valve core (1) includes a mounting post (5) and a valve core body (6). The mounting post (5) extends outward from one end of the valve core body (6) and is inclined inward along the radial direction away from the valve core body (6). A necked portion (7) is formed between the valve core body (6) and the mounting post (5). A mounting hole (24) is formed in the central area of ​​the diaphragm (2) for the mounting post (5) to pass through. After the mounting post (5) passes through the mounting hole (24), the inner edge of the mounting hole (24) of the diaphragm (2) is embedded in the necked portion (7), so that the central area of ​​the diaphragm (2) is fixed on the valve core (1).

4. The improved structure of the back pressure valve sealing valve plate as described in claim 3, characterized in that: The diaphragm (2) forms an installation groove (23) for accommodating the valve core body (6) on the side facing the back pressure chamber (200). After the installation post (5) passes through the installation hole (24), the valve core body (6) is fitted into the installation groove (23).

5. The improved structure of the back pressure valve sealing valve plate as described in claim 3, characterized in that: The outer peripheral edge of the valve core body (6) protrudes outward to form a flange (8). The flange (8) abuts against the inner wall of the mounting groove (23), so that a water passage gap is formed between the mounting groove (23) and the outer wall of the valve core body (6). The flange (8) and the protruding post (3) are in the same position, so that the flow channel (4) is connected to the back pressure chamber (200) through the water gap.

6. The improved structure of the back pressure valve sealing valve plate as described in claim 1, characterized in that: The end of the flow channel (4) protrudes slightly from the surface of the diaphragm (2) or is flush with the surface of the diaphragm (2).

7. The improved structure of the back pressure valve sealing valve plate as described in claim 1, characterized in that: The cross-section of the protruding post (3) is U-shaped.

8. A water tank inlet valve employing the improved structure of the back pressure valve sealing valve plate as described in claim 1, characterized in that: The system includes a valve body (400) and a float assembly (500). A valve cover (12) is detachably mounted on the valve body (400). An inlet channel (600) and an outlet channel (300) are formed inside the valve body (400). A valve core (1) is located at the inlet of the outlet channel (300). A diaphragm (2) is installed inside the valve body (400), separating the valve body (400) into an inlet chamber (100) and a back pressure chamber (200). The inlet chamber (100) surrounds the outlet channel (300) and is connected to the inlet channel (600). The back pressure chamber (200) is located on the side of the diaphragm (2) away from the inlet chamber (100). The side wall of the back pressure chamber (200) is through to form a pressure relief hole (201). The float assembly (500) is provided with a plug (501) corresponding to the position of the pressure relief hole (201). The plug (501) is used to open or block the pressure relief hole (201).

9. The water tank inlet valve as described in claim 8, characterized in that: The float assembly (500) is connected to a first elastic element (9), which is used to elastically drive the plug (501) away from the pressure relief hole (201). After the water level in the toilet tank rises, the buoyancy overcomes the elastic force of the first elastic element (9) to drive the plug (501) to seal the pressure relief hole (201).

10. The water tank inlet valve as described in claim 8, characterized in that: The back pressure chamber (200) is provided with a second elastic element (10), which is used to elastically drive the valve core (1) to block the water outlet channel (300).

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