An inlet composite seal structure with a resilient element

Abstract

The utility model provides an import composite sealing structure with elastic element, including valve body, still including the valve cover of valve body both ends, is connected with the valve stem on the valve body and penetrates, the central movable joint of valve body has the valve ball, the flow channel of valve body has the import end and export end, is provided with the import valve seat in the import end, is provided with the export valve seat in the export end, the other end of import valve seat is provided with valve seat groove a, the O type ring is inlayed in valve seat groove a, the inner ring of O type ring nests has spring energy ring, the other end of export valve seat is provided with valve seat groove b, the utility model discloses through the composite sealing structure of O type ring embedding metal sealing groove, this structure is compact, need not complicated additional parts, can realize the superhigh performance sealing of nearly zero leakage in import and export end, can ensure reliable sealing even at low pressure or cold state starting, and O type ring is protected by metal, and adopts double compensation mechanism on import and export end sealing structure, and the service life is prolonged significantly.

Description

Technical Field

[0001] This utility model relates to the field of one-way ball valve technology, and in particular to an imported composite sealing structure with an elastic element. Background Technology

[0002] The one-way ball valve features an aluminum alloy single flange structure, with the other end customizable as either male or female for connection to quick couplings. It is a key accessory for oil tanks and tank trucks, suitable for controlling the opening and closing of pipelines transporting non-corrosive liquids.

[0003] Chinese patent CN202420723262.X discloses a one-way sealing ball valve, including a valve body; a first flange is fixedly installed at one end of the valve body, and a second flange is fixedly connected to the other end of the valve body. A base is provided at the bottom of the valve body, and a support frame is fixedly installed on the top of the base. A second rubber gasket is attached to the top of the support frame and fixedly connected to the bottom of the valve body. Side frames are fixedly installed on the top of the base on both sides of the support frame, and the first rubber gasket is fixedly installed on the inner side of the side frames. The side frames and fixed frames can support and fix the main body of the one-way ball valve, avoiding severe vibration when fluid passes through the valve body rapidly. At the same time, the fixed frames and movable frames can limit and fix the first and second flanges to the externally connected flanges, preventing the flanges from separating and thus avoiding leakage of the one-way ball valve, improving the sealing effect.

[0004] However, this technical solution has certain shortcomings in use. Although traditional hard-seal valves are robust and durable, they are limited by the microscopic unevenness of the metal surface, making it difficult to achieve zero leakage when starting at low temperature or low pressure. While traditional soft-seal valves can achieve zero leakage, their sealing materials are prone to failure under harsh conditions. To solve the leakage problem of hard seals in harsh environments, existing technologies have introduced designs that add elastic elements to the metal sealing pair, but these designs are usually complex. At the same time, a single seal improvement cannot meet the high sealing performance requirements of valves, especially in situations with high inlet pressure and severe scouring. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an inlet composite sealing structure with elastic elements. This structure achieves sealing by combining inlet and outlet valve seat sealing structures with a sealing compensation structure, thus solving the problem of poor sealing performance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An inlet composite sealing structure with elastic elements includes a valve body and valve covers at both ends of the valve body. A valve stem is connected through the valve body, and a valve ball is movably connected to the center of the valve body. The flow channel of the valve body has an inlet end and an outlet end. An inlet valve seat is provided at the inlet end, and an outlet valve seat is provided at the outlet end. One end of the inlet valve seat is a ball contact end a, and the other end of the inlet valve seat has a valve seat groove a. An O-ring is embedded in the valve seat groove a, and a spring energy storage ring is nested in the inner ring of the O-ring. One end of the outlet valve seat is a ball contact end b, and the other end of the outlet valve seat has a valve seat groove b. A limiting groove is provided on the inner wall of the valve seat groove b, and a sealing spring is provided in the limiting groove. The other end of the sealing spring is fixedly connected to the outlet end base.

[0008] The inlet valve seat is a hard alloy valve seat, the O-ring is made of graphite, and the cross-sectional diameter of the O-ring is slightly larger than the depth of the valve seat groove a, so that the O-ring protrudes from the metal sealing surface; the outlet valve seat is made of PTFE, which forms a soft seal with the spherical surface of the valve ball.

[0009] A medium channel is provided at the center of the valve ball, and the valve stem passes through the elastic wave washer on the valve body and is connected to the valve ball, which can drive the valve ball to rotate 90 degrees.

[0010] Two sets of pressure sensors are threaded onto the valve seat groove a. The surfaces of the two sets of pressure sensors are covered with stainless steel foil. The pressure sensor wires are led out through microholes on the inlet valve seat base. The microholes are sealed using glass-metal sealing technology.

[0011] The concave arc surfaces of the ball contact end a on the inlet valve seat and the ball contact end b on the outlet valve seat are consistent with and tightly fitted to the arc surface of the valve ball, forming a seal.

[0012] Multiple sets of compensating damping columns are provided in the valve seat groove b. The other end of the multiple sets of compensating damping columns is fixedly connected to the outlet end base. A compensating spring is provided in the compensating damping column.

[0013] A valve handle is installed at the top of the valve stem via a nut, and an elastic wave washer is provided at the connection between the valve stem and the valve body.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model adopts a composite sealing structure in which the O-ring is embedded in the metal sealing groove. This structure is compact and does not require complex additional parts. It can achieve a near-zero leakage ultra-high performance seal at both the inlet and outlet ends. It can ensure a reliable seal even at low pressure or cold start. At the same time, the O-ring is protected by metal, resisting erosion and extrusion, and its service life is significantly extended.

[0016] (2) This utility model achieves improved valve sealing performance through the innovative combination of dual compensation mechanisms. At the inlet end, the spring energy storage ring, as a built-in perpetual motion core, actively and continuously compensates for the elastic decay and creep of the non-metallic sealing ring material. At the outlet end, the compensation damping column, as an external adaptive support, passively and precisely compensates for the physical dimensional loss of the valve seat caused by wear and erosion, maintaining the sealing position. The two work together to provide dual protection for the valve sealing system, ensuring that the sealing contact pressure is always maintained within the effective range, thereby achieving full-condition adaptability, high reliability, and an ultra-long sealing life far exceeding that of traditional designs.

[0017] (3) This utility model continuously and accurately measures the sealing pressure of the O-ring through a pressure sensor, transforming the abstract sealing state into specific pressure data, thereby realizing real-time diagnosis and trend prediction of sealing performance. This transforms the maintenance method from traditional periodic replacement to data-based predictive maintenance, and can provide early warning before the sealing force decays to a dangerous threshold. This not only greatly improves the reliability and safety of valve operation under extreme working conditions, but also provides key data support for optimizing sealing design and extending service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the ball valve of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the ball valve of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall structure of the imported valve seat of this utility model;

[0021] Figure 4 This is a schematic diagram of the cross-sectional structure of the imported valve seat of this utility model;

[0022] Figure 5 This is a schematic diagram of the outlet valve seat structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the outlet valve seat of this utility model.

[0024] Figure Labels

[0025] 1. Valve body; 2. Valve cover; 3. Valve stem; 301. Valve handle; 302. Elastic wave washer; 4. Valve ball; 401. Medium passage; 5. Inlet end; 6. Outlet end; 7. Inlet valve seat; 701. Ball contact end a; 702. Valve seat groove a; 703. O-ring; 704. Spring accumulator; 705. Pressure sensor; 8. Outlet valve seat; 801. Ball contact end b; 802. Valve seat groove b; 803. Restriction groove; 804. Sealing spring; 805. Compensating damping column; 8051. Compensating spring. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Example

[0030] like Figures 1-6 As shown, this embodiment provides an inlet composite sealing structure with elastic elements, including a valve body 1, and valve covers 2 at both ends of the valve body 1. A valve stem 3 is connected through the valve body 1, and a valve ball 4 is movably connected to the center of the valve body 1. The flow channel of the valve body 1 has an inlet end 5 and an outlet end 6. An inlet valve seat 7 is provided at the inlet end 5, and an outlet valve seat 8 is provided at the outlet end 6. One end of the inlet valve seat 7 is a ball contact end a701, and the other end of the inlet valve seat 7 has a valve seat groove a702. An O-ring 703 is embedded in the valve seat groove a702, and a spring energy storage ring 704 is nested in the inner ring of the O-ring 703. One end of the outlet valve seat 8 is a ball contact end b801, and the other end of the outlet valve seat 8 has a valve seat groove b802. A limiting groove 803 is provided on the inner wall of the valve seat groove b802, and a sealing spring 804 is provided in the limiting groove 803. The other end of the sealing spring 804 is fixedly connected to the base of the outlet end 6.

[0031] The inlet valve seat 7 is a hard alloy valve seat, and the O-ring 703 is made of graphite. The cross-sectional diameter of the O-ring 703 is slightly larger than the depth of the valve seat groove a702, so that the O-ring 703 protrudes from the metal sealing surface. The outlet valve seat 8 is made of PTFE, which forms a soft seal with the spherical surface of the valve ball 4.

[0032] A medium channel 401 is provided at the center of the valve ball 4. The valve stem 3 passes through the elastic wave washer 302 on the valve body 1 and is connected to the valve ball 4, which can drive the valve ball 4 to rotate 90 degrees.

[0033] In this embodiment, when the valve is closed, the valve stem 3 is rotated so that the axis of the medium channel 401 of the valve ball 4 is perpendicular to the axis of the flow channel of the valve body 1. During this process, the elastic waveform gasket 302 provides a seal at the connection between the valve stem 3 and the flow channel of the valve body 1, while the waveform structure of the elastic waveform gasket 302 can reduce vibration. The arc surface of the valve ball 4 presses against the inlet valve seat 7 and the outlet valve seat 8 at the same time. At the inlet end 5, the O-ring 703 is compressed and produces elastic deformation, so that the inlet valve seat 7 and the arc surface of the valve ball 4 fit tightly to form a seal. At the outlet end 6, the outlet valve seat 8 undergoes elastic deformation and fits perfectly with the ball surface to achieve zero leakage seal.

[0034] During sealing, the spring energy storage ring 704 in the inner ring of the O-ring 703 provides a constant and non-decaying initial radial expansion force, enabling the O-ring 703 to maintain sufficient contact pressure on the valve seat groove a702 and the mating surface even under low pressure, thereby improving the sealing effect. At the same time, when the elasticity of the O-ring 703 decays, the expansion force of the spring energy storage ring 704 becomes the main source of sealing force, continuously supporting the O-ring 703, compensating for the aging loss of the material, and enabling the sealing system to maintain stable performance throughout its life cycle.

[0035] The sealing spring 804 on the outlet valve seat 8 provides the initial sealing force, ensuring sufficient pressure on the contact surface between the outlet valve seat 8 and the valve ball 4, further improving the sealing effect. At the same time, through the counteracting force of the compensating spring 8051 inside the multiple sets of compensating damping columns 805, when the outlet valve seat 8 becomes thinner due to wear of the valve ball 4 or erosion by the medium after long-term use, this set of springs will continuously push the entire valve seat assembly towards the ball for a certain distance, thereby maintaining the preload of the sealing spring 804 and the contact pressure between the outlet valve seat 8 and the valve ball 4, ensuring the sealing effect.

[0036] Two sets of pressure sensors 705 are threaded onto the valve seat groove a702. The surfaces of the two sets of pressure sensors 705 are covered with stainless steel foil. The wires of the pressure sensors 705 are led out through microholes on the base of the inlet valve seat 7. The microholes are sealed using glass-metal sealing technology.

[0037] In this embodiment, the pressure sensor 705 continuously and accurately measures the sealing pressure of the O-ring 703, transforming the abstract sealing state into specific pressure data. This enables real-time diagnosis and trend prediction of sealing performance, changing the maintenance method from traditional periodic replacement to data-driven predictive maintenance. It can provide early warnings before the sealing force decays to a dangerous threshold, which not only greatly improves the reliability and safety of valve operation under extreme conditions, but also provides key data support for optimizing sealing design and extending service life.

[0038] The concave arc surfaces of the ball contact end a701 on the inlet valve seat 7 and the ball contact end b801 on the outlet valve seat 8 are consistent with and tightly fitted to the arc surface of the valve ball 4, forming a seal.

[0039] Multiple sets of compensating damping columns 805 are provided in the valve seat groove b802. The other end of the multiple sets of compensating damping columns 805 is fixedly connected to the base of the outlet end 6. Compensating springs 8051 are provided in the compensating damping columns 805.

[0040] A valve handle 301 is installed at the top of the valve stem 3 via a nut, and an elastic wave washer 302 is provided at the connection between the valve stem 3 and the valve body 1.

[0041] In this embodiment, the elastic waveform gasket 302 seals the connection between the valve stem 3 and the flow channel of the valve body 1. The waveform structure of the elastic waveform gasket 302 isolates and absorbs harmful kinetic energy, protects the stability of the sealing pair, and improves the operating feel and component life.

[0042] Working principle

[0043] When the valve needs to be closed, rotate the valve stem 3 so that the axis of the medium passage 401 of the valve ball 4 is perpendicular to the axis of the flow channel of the valve body 1. During this process, the elastic wave washer 302 provides a seal at the connection between the valve stem 3 and the flow channel of the valve body 1. At the same time, the wave structure of the elastic wave washer 302 can reduce vibration. The arc surface of the valve ball 4 presses against the inlet valve seat 7 and the outlet valve seat 8. At the inlet end 5, the O-ring 703 is compressed and produces elastic deformation, so that the inlet valve seat 7 and the arc surface of the valve ball 4 fit tightly to form a seal. At the outlet end 6, the outlet valve seat 8 undergoes elastic deformation and fits perfectly with the ball surface to achieve zero leakage seal. During the sealing process, the sealing pressure of the O-ring 703 is continuously and accurately measured by the pressure sensor 705.

[0044] During sealing, the spring energy storage ring 704 in the inner ring of the O-ring 703 provides a constant and non-decaying initial radial expansion force, enabling the O-ring 703 to maintain sufficient contact pressure on the valve seat groove a702 and the mating surface even under low pressure, thereby improving the sealing effect. At the same time, when the elasticity of the O-ring 703 decays, the expansion force of the spring energy storage ring 704 becomes the main source of sealing force, continuously supporting the O-ring 703, compensating for the aging loss of the material, and enabling the sealing system to maintain stable performance throughout its life cycle.

[0045] The sealing spring 804 on the outlet valve seat 8 provides the initial sealing force, ensuring sufficient pressure on the contact surface between the outlet valve seat 8 and the valve ball 4, further improving the sealing effect. At the same time, through the counteracting force of the compensating spring 8051 inside the multiple sets of compensating damping columns 805, when the outlet valve seat 8 becomes thinner due to wear of the valve ball 4 or erosion by the medium after long-term use, this set of springs will continuously push the entire valve seat assembly towards the ball for a certain distance, thereby maintaining the preload of the sealing spring 804 and the contact pressure between the outlet valve seat 8 and the valve ball 4, ensuring the sealing effect.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An inlet composite sealing structure with an elastic element, comprising a valve body (1), characterized in that, It also includes valve covers (2) at both ends of the valve body (1), a valve stem (3) is connected through the valve body (1), a valve ball (4) is movably connected to the center of the valve body (1), the flow channel of the valve body (1) has an inlet end (5) and an outlet end (6), the inlet end (5) is provided with an inlet valve seat (7), and the outlet end (6) is provided with an outlet valve seat (8); One end of the inlet valve seat (7) is a ball contact end a (701), and the other end of the inlet valve seat (7) is provided with a valve seat groove a (702). An O-ring (703) is embedded in the valve seat groove a (702), and a spring energy storage ring (704) is nested in the inner ring of the O-ring (703). One end of the outlet valve seat (8) is a ball contact end b (801), and the other end of the outlet valve seat (8) is provided with a valve seat groove b (802). The inner wall of the valve seat groove b (802) is provided with a limiting groove (803). A sealing spring (804) is provided in the limiting groove (803), and the other end of the sealing spring (804) is fixedly connected to the base of the outlet end (6).

2. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, The inlet valve seat (7) is a hard alloy valve seat, and the O-ring (703) is made of graphite material. The cross-sectional diameter of the O-ring (703) is slightly larger than the depth of the valve seat groove a (702), so that the O-ring (703) protrudes from the metal sealing surface. The outlet valve seat (8) is made of PTFE and forms a soft seal with the spherical surface of the valve ball (4).

3. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, A medium channel (401) is provided at the center of the valve ball (4). The valve stem (3) passes through the elastic wave washer (302) on the valve body (1) and is connected to the valve ball (4), and can drive the valve ball (4) to rotate 90 degrees.

4. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, Two sets of pressure sensors (705) are threaded onto the valve seat groove a (702). The surfaces of the two sets of pressure sensors (705) are covered with stainless steel foil. The wires of the pressure sensors (705) are led out through microholes on the base of the inlet valve seat (7). The microholes are sealed using glass-metal sealing technology.

5. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, The concave arc surfaces of the ball contact end a (701) on the inlet valve seat (7) and the ball contact end b (801) on the outlet valve seat (8) are consistent with and closely fitted to the arc surface of the valve ball (4), forming a seal.

6. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, Multiple sets of compensating damping columns (805) are provided in the valve seat groove b (802). The other end of the multiple sets of compensating damping columns (805) is fixedly connected to the base of the outlet end (6). A compensating spring (8051) is provided in the compensating damping column (805).

7. The inlet composite sealing structure with elastic element according to claim 1, characterized in that, A valve handle (301) is installed at the top of the valve stem (3) by a nut, and an elastic wave washer (302) is provided at the connection between the valve stem (3) and the valve body (1).

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