Sealing structure of water feeding valve

Abstract

The utility model discloses a sealing structure of a water feeding valve. The sealing structure comprises a barrel, a first sealing assembly and a second sealing assembly. The first sealing assembly comprises a contact ring, a sealing piston, a fixing plate and a first compression spring. The second sealing assembly comprises a middle plate, a sealing ball, a control rod and a second compression spring. The contact ring is fixedly connected into the barrel, the sealing piston is slidably connected with the mounting step, the fixing plate is fixedly connected into the barrel, the middle plate is fixedly connected into the sealing piston, the sealing ball is arranged in the sealing piston and faces the water inlet, the control rod is fixedly connected to the fixing plate, and the two ends of the first compression spring are connected with the middle plate and the fixing plate respectively. Two ends of the second compression spring are respectively connected with the sealing piston and the sealing ball. The first sealing assembly and the second sealing assembly work together to achieve double sealing. When water flow passes through the water inlet, first sealing is formed between the sealing piston and the contact ring, and the sealing ball provides additional sealing in follow-up action.

Description

TECHNICAL FIELD

[0001] The utility model belongs to valve technical field, concretely is a sealing structure of water inlet valve. BACKGROUND

[0002] The valve is also called check valve, and is a low-pressure flat valve. The valve functions to ensure one-way flow of liquid in the suction pipe, so that the pump can work normally. When the pump stops working for a short time, the liquid cannot return to the water source tank, so that the suction pipe is filled with liquid, thereby facilitating the start of the pump. The foot valve is an energy-saving valve, which is generally installed at the bottom end of the underwater suction pipe of the water pump, and limits the return of the liquid in the water pump pipe to the water source, thereby playing the function of only inletting and not outletting.

[0003] The water inlet valve is generally arranged at the bottom of water, and is prone to bottom running in actual use. The water with impurities is easy to directly enter the water pump. In addition, the check structure in the existing water inlet valve is generally flat, and the sealing effect is poor in the use process. When the water pump stops, the water in the water pump and the water pipe will flow back, which is not conducive to the restart of the water pump.

[0004] In the authorized announcement No. CN217559107U of the Chinese utility model patent, an automatic water inlet bottom valve with a float is disclosed, which comprises a bottom valve body, a water inlet is arranged on the side wall of the bottom valve body, a water outlet is arranged at the right end, an installation plate is arranged in the bottom valve body, and the installation plate divides the inside of the bottom valve body into a first chamber and a second chamber; a motor is arranged in the second chamber, a impeller is connected to the output shaft of the motor, a check structure is arranged at the right end of the impeller, and the check structure is used for preventing water flow from flowing back. According to the content of the drawings and the specification, it can be obtained that the check structure of the water inlet valve is flat, and therefore impurities are easy to be stuck in the position of the check structure, causing poor sealing effect of the water inlet valve. When the water pump stops, the water in the water pump and the water pipe will flow back. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a sealing structure of water inlet valve, so as to solve the following technical problems in the background art:

[0006] The check structure in some water inlet valves is generally flat, and in the use process, sludge and impurities are easy to be stuck in the position of the check structure, causing poor sealing effect of the water inlet valve. When the water pump stops, the water in the water pump and the water pipe will flow back, which is not conducive to the restart of the water pump.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme:

[0008] The utility model provides a sealing structure of upper water valve, sealing structure is connected with the casing of upper water valve, and sealing structure includes cylinder, first sealing assembly and second sealing assembly, the installation step is arranged in the cylinder, first sealing assembly includes contact ring, sealing piston, fixed plate and first compression spring, and second sealing assembly includes intermediate plate, sealing ball, control rod and second compression spring, contact ring is fixedly connected in the cylinder, and sealing piston is slidably connected with the installation step, and one side of sealing piston can be connected with contact ring, fixed plate is fixedly connected in the cylinder, and intermediate plate is fixedly connected in sealing piston, and the water inlet is arranged on sealing piston, and the water passing opening is arranged on intermediate plate, and the water outlet is arranged on fixed plate, sealing ball is arranged in sealing piston and is towards the water inlet, control rod is fixedly connected with fixed plate, and control rod can be abutted with sealing ball, and the both ends of first compression spring are connected with intermediate plate and fixed plate respectively, and the both ends of second compression spring are connected with sealing piston and sealing ball respectively.

[0009] Further, the side of the contact ring towards the sealing piston is provided with an inclined contact part, and the side of the sealing piston towards the contact ring is provided with a matching part matched with the contact part.

[0010] Further, the contact part is provided with a sealing gasket.

[0011] Further, the cylinder is connected with the casing flange of the upper water valve.

[0012] Further, a sealing ring is arranged between the cylinder and the casing of the upper water valve.

[0013] Further, the two sides of the sealing piston are symmetrically provided with the water inlets.

[0014] Further, the side of the sealing piston close to the installation step is provided with a sealing groove, and a plurality of sealing rings are arranged in the sealing groove.

[0015] Further, the water outlet is fixedly connected with a fixed head, and the control rod is connected with the fixed head.

[0016] Further, the side of the intermediate plate close to the sealing ball is provided with an arc-shaped matching notch.

[0017] Further, the side of the casing of the upper water valve is provided with a water inlet, and a filter screen is arranged in the water inlet.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] The first sealing assembly and the second sealing assembly of the utility model work together to realize double sealing. When water flows through the water inlet, the first sealing is formed between the sealing piston and the contact ring, and the sealing ball provides additional sealing in the subsequent action. This double design effectively prevents water flow from flowing backward and ensures the sealing of the system. Due to the double sealing structure of the sealing ball and the sealing piston, the sealing fatigue or failure caused by impurities in the water can be reduced. This design ensures that even if there are tiny impurities, the sealing effect will not be significantly affected. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an internal structure schematic view of the utility model;

[0021] Figure 2 It is an internal structure schematic view of the sealing structure of the utility model;

[0022] Figure 3 It is an internal structure schematic view of the sealing structure of the utility model.

[0023] Marked in the figure: 1 - shell, 2 - water inlet, 3 - filter screen, 4 - contact ring, 5 - second compression spring, 6 - cylinder, 7 - intermediate plate, 8 - sealing ball, 9 - mounting step, 10 - control rod, 11 - water outlet, 12 - fixed head, 13 - fixed plate, 14 - first compression spring, 15 - water inlet, 16 - sealing groove, 17 - sealing piston, 18 - water inlet, 19 - contact part, 20 - sealing gasket, 21 - matching part, 22 - sealing ring, 23 - sealing ring, 24 - matching notch. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Embodiment:

[0026] A sealing structure of a water inlet valve, such as Figure 1As shown, the sealing structure is connected with the housing 1 of the water inlet valve, and the sealing structure comprises a cylinder body 6, a first sealing assembly and a second sealing assembly; the cylinder body 6 is provided with a mounting step 9 inside, the first sealing assembly comprises a contact ring 4, a sealing piston 17, a fixed plate 13 and a first compression spring 14, and the second sealing assembly comprises an intermediate plate 7, a sealing ball 8, a control rod 10 and a second compression spring 5; the contact ring 4 is fixedly connected in the cylinder body 6, the sealing piston 17 is in sliding connection with the mounting step 9 and one side of the sealing piston 17 can be in contact with the contact ring 4, the fixed plate 13 is fixedly connected in the cylinder body 6, the intermediate plate 7 is fixedly connected in the sealing piston 17, the sealing piston 17 is provided with a water inlet 18, the intermediate plate 7 is provided with a water passing hole 15, and the fixed plate 13 is provided with a water outlet 11; the sealing ball 8 is arranged in the sealing piston 17 and faces the water inlet 18, the control rod 10 is fixedly connected with the fixed plate 13, the control rod 10 can abut against the sealing ball 8, the first compression spring 14 is connected with the intermediate plate 7 and the fixed plate 13 at both ends respectively, and the second compression spring 5 is connected with the sealing piston 17 and the sealing ball 8 at both ends respectively. It should be noted that the present application is directed to the sealing structure, and the structure of the water inlet valve body adopts the prior art, for example, the water inlet valve structure in the utility model patent with the authorization announcement number CN217559107U can be referred to.

[0027] The first sealing assembly and the second sealing assembly are used to realize double sealing, so as to improve the sealing effect. Specifically, when the water pump is used, when the water pump is filled with water, the sealing piston 17 moves to the right due to the pressure difference, the sealing piston 17 and the contact ring 4 are opened, and the water enters the sealing piston 17 through the water inlet 18. The sealing piston 17 continues to move to the right, the control rod 10 abuts against the sealing ball 8, the water passing hole 15 on the intermediate plate 7 is opened, the water in the sealing piston 17 flows out from the water passing hole 15, and finally flows to the water pump through the water outlet 11. The opening state of the sealing structure is as shown in Figure 3 When the water pump is closed, the first compression spring 14 drives the sealing piston 17 to reset, the sealing piston 17 is pressed on the contact ring 4, the second compression spring 5 drives the sealing ball 8 to reset, and the sealing ball 8 closes the water passing hole 15. At this time, the sealing piston 17 plays a main sealing role, the sealing ball 8 plays an auxiliary sealing role, and the sealing ring 22 and the sealing ball 8 jointly prevent the backflow of water. Due to the double sealing, the problem of poor sealing effect caused by impurities can be effectively reduced.

[0028] In a preferred embodiment, as Figure 2As shown, the contact ring 4 is provided with an inclined contact portion 19 on the side facing the sealing piston 17, and the sealing piston 17 is provided with a matching portion 21 on the side facing the contact ring 4. Further optimization, the contact portion 19 is provided with a sealing pad 20. This matching portion 21 design ensures the precise docking between the sealing piston 17 and the contact ring 4 in the closed state, effectively improving the stability and reliability of the seal. The sealing pad 20 not only fills the small gap between the contact ring 4 and the sealing piston 17, but also absorbs the small deformation caused by pressure changes or movement, effectively preventing water leakage. This design can further reduce the risk of seal failure due to impurities or gaps caused by wear, ensuring reliable sealing effect under various working conditions

[0029] In a preferred embodiment, as shown in Figure 2 The barrel 6 is flange-connected with the housing 1 of the upper water valve. Further optimization, a sealing ring 23 is provided between the barrel 6 and the housing 1 of the upper water valve. This design ensures the tight combination between the two structures, which helps to maintain the mechanical strength and stability of the system. The sealing ring 23 not only fills the gap between the barrel 6 and the housing 1, but also effectively prevents liquid leakage during operation.

[0030] In a preferred embodiment, as shown in Figure 2 The sealing piston 17 is symmetrically provided with water inlets 18 on both sides. The symmetrical arrangement of the water inlets 18 can ensure that the water flow enters from both sides of the sealing piston 17 at the same time. This design reduces the impact of water flow imbalance on the sealing piston 17, preventing piston deviation or jamming caused by unilateral water flow impact, thereby improving the stability and reliability of the sealing structure. In addition, the double-sided water inlets 18 can provide greater water inflow when the water pump is operating, promoting the rapid passage of water flow, making the entire system operate more efficiently when working.

[0031] In a preferred embodiment, as shown in Figure 2 The sealing piston 17 is provided with a sealing groove 16 on the side close to the mounting step 9, and a plurality of sealing rings 22 are arranged in the sealing groove 16. The multiple sealing rings 22 embedded in the sealing groove 16 can form multiple sealing layers, further improving the sealing effect. This multi-layer sealing design can effectively reduce the seal failure caused by factors such as pressure fluctuations and temperature changes, providing a reliable leak-proof barrier. The sealing ring 22 may be deformed or worn due to pressure and friction during use, and the design of the sealing groove 16 allows the sealing ring 22 to have a certain space for movement, thereby maintaining the seal while adapting to these changes and extending the service life of the sealing element.

[0032] In a preferred embodiment, as shown in Figure 2As shown, the water outlet 11 is fixed with a fixed head 12, and the control rod 10 is connected with the fixed head 12.

[0033] In a preferred embodiment, as shown, an arc-shaped matching notch 24 is arranged on the side of the intermediate plate 7 close to the sealing ball 8. Figure 3 As shown, the arc-shaped matching notch 24 can form a more perfect matching surface between the sealing ball 8 and the intermediate plate 7.

[0034] In a preferred embodiment, as shown, the water inlet 2 is arranged on one side of the housing 1 of the water inlet valve, and the filter screen 3 is arranged in the water inlet 2. Figure 2 The filter screen 3 arranged in the water inlet 2 can effectively intercept solid particles, sediments and other impurities in the water, such as sand, iron filings or scale, etc.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "arrangement", "connection", "fixing", "screw connection" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application by the person skilled in the art according to the specific situation.

[0037] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A sealing structure of a water-supply valve, the sealing structure being connected to a housing (1) of the water-supply valve, characterized in that: The sealing structure comprises a cylinder (6), a first sealing assembly and a second sealing assembly; the cylinder (6) is provided with a mounting step (9) inside; the first sealing assembly comprises a contact ring (4), a sealing piston (17), a fixed plate (13) and a first compression spring (14); the second sealing assembly comprises an intermediate plate (7), a sealing ball (8), a control rod (10) and a second compression spring (5); The contact ring (4) is fixedly connected to the cylinder (6); the sealing piston (17) is in sliding connection with the mounting step (9), and one side of the sealing piston (17) is capable of being in contact with the contact ring (4); the fixed plate (13) is fixedly connected to the cylinder (6); the intermediate plate (7) is fixedly connected to the sealing piston (17); the sealing piston (17) is provided with a water inlet (18); the intermediate plate (7) is provided with a water passing hole (15); and the fixed plate (13) is provided with a water outlet (11). The sealing ball (8) is arranged in the sealing piston (17) and faces the water inlet (18); the control rod (10) is fixedly connected to the fixed plate (13); the control rod (10) is capable of abutting against the sealing ball (8); the first compression spring (14) is connected to the intermediate plate (7) and the fixed plate (13) at two ends respectively; and the second compression spring (5) is connected to the sealing piston (17) and the sealing ball (8) at two ends respectively.

2. The seal structure of a water inlet valve according to claim 1, wherein: The side of the contact ring (4) facing the sealing piston (17) is provided with an inclined contact portion (19); and the side of the sealing piston (17) facing the contact ring (4) is provided with a matching portion (21) matched with the contact portion (19).

3. The seal for an upper water valve of claim 1, wherein: The contact portion (19) is provided with a sealing gasket (20).

4. The seal for an upper water valve of claim 1, wherein: The cylinder (6) is flange-connected to a housing (1) of the water inlet valve.

5. The seal for an upper water valve of claim 4, wherein: A sealing ring (23) is arranged between the cylinder (6) and the housing (1) of the water inlet valve.

6. The seal for an upper water valve of claim 1, wherein: The water inlets (18) are symmetrically arranged at two sides of the sealing piston (17).

7. The seal for an upper water valve of claim 1, wherein: The sealing piston (17) is provided with a sealing groove (16) at the side close to the mounting step (9); and the sealing groove (16) is provided with a plurality of sealing rings (22).

8. The seal for an upper water valve of claim 1, wherein: The water outlet (11) is fixedly connected with a fixed head (12); and the control rod (10) is connected with the fixed head (12).

9. The seal for an upper water valve of claim 1, wherein: The intermediate plate (7) is provided with an arc-shaped matching notch (24) at the side close to the sealing ball (8).

10. The seal for an upper water valve of claim 1, wherein: The housing (1) of the water inlet valve is provided with a water inlet (2) at one side; and the water inlet (2) is provided with a filter screen (3).

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