Valve pad assembly capable of eliminating whistle

Abstract

The valve pad assembly comprises a valve seat, a valve element and a sealing pad, the valve element and the valve seat are oppositely arranged, and the valve element moves to be used for driving a sealing piece to abut against the valve seat; the whistle stopping part is arranged on the valve element or the sealing gasket or between the valve element and the sealing gasket so as to shield a gap between the sealing gasket and the valve element; the whistle generated between the gas flowing at high speed and the gap when the valve is opened is avoided, the valve pad assembly is prevented from being damaged by high-frequency vibration generated by the whistle, and therefore the service life of the valve pad assembly is prolonged.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, and more specifically to a valve pad assembly capable of eliminating whistling sounds. Background Technology

[0002] Natural gas, as a clean and efficient energy source, provides a stable energy supply for various industries, households, and transportation. Due to its abundant reserves and global distribution, natural gas plays a vital role in ensuring national energy security. It is widely used in industries such as chemicals, steel, and metallurgy, serving as an important raw material and fuel supporting many production processes, such as the production of synthetic ammonia, methanol, and ethylene. In households, natural gas is commonly used for heating, cooking, and hot water supply. Compared to electricity or coal, natural gas is more convenient, efficient, and environmentally friendly in both residential and commercial settings. To enhance safety during natural gas use, pressure regulating valves are installed at natural gas pipelines to control the flow rate and on / off status, making its use safer and more controllable.

[0003] However, existing pressure regulating valves have the following drawbacks: The valve has a cavity containing a valve seat and a valve core. The valve core is controlled by a valve stem and has a sealing gasket. When the valve opens, gas flows at high speed through the gap between the valve core and the valve seat. Some of this high-speed gas impacts the inner wall of the cavity, causing a change in gas flow direction. This altered gas flow then rushes into the gap between the valve core and the sealing gasket, resulting in a whistling sound from the valve gasket assembly. The high-frequency vibration from this whistling sound damages the valve gasket assembly, leading to long-term failure or damage to the sealing gasket. Furthermore, the whistling sound generates significant noise, increasing environmental pollution. Therefore, optimizing the structure of the valve gasket assembly to prevent whistling when the pressure regulating valve opens, extend the service life of the sealing gasket, and reduce noise pollution is essential. Utility Model Content

[0004] One objective of this application is to provide a valve pad assembly that can eliminate whistling, thereby solving the problem of whistling when a pressure regulating valve is opened.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A valve gasket assembly capable of eliminating whistling includes: a valve seat, a valve core, and a sealing gasket, wherein the valve core and the valve seat are disposed opposite to each other, and the valve core is movable to drive the sealing element to press against the valve seat; a whistling stop part is disposed on the valve core, on the sealing gasket, or between the valve core and the sealing gasket to block the gap between the sealing gasket and the valve core.

[0006] As a preferred embodiment, the valve core is provided with a first contact surface, and a whistle stop is provided on the peripheral edge of the first contact surface and protrudes in the direction of the valve seat relative to the first contact surface, so that the whistle stop surrounds the sealing gasket.

[0007] Preferably, the stop valve part and the valve core are integrally formed.

[0008] As another preferred option, the stop valve and the valve core are fixedly connected by welding.

[0009] As another preferred embodiment, the whistle-stopping part includes: a mounting part fixed to the valve core, a sealing gasket fixed to the mounting part; and an extension part fixed to the peripheral edge of the mounting part, and extending in the direction of the valve seat to surround the sealing gasket.

[0010] Preferably, the mounting part and the valve core are fixedly connected by welding.

[0011] Preferably, the height of the whistle stop is less than or equal to the thickness of the sealing gasket.

[0012] Further optimization is to select a value for the thickness 'a' of the whistle stop part within the range of 1mm ≤ a ≤ 3mm.

[0013] Preferably, the valve seat, valve core, and stop valve are made of at least one of the following or a combination thereof: stainless steel, copper alloy, and carbon steel.

[0014] Preferably, the sealing gasket has a second contact surface, and the whistle stop portion is located on the peripheral edge of the second contact surface and protrudes in the direction of the valve core relative to the second contact surface, so that the whistle stop portion covers at least a portion of the valve core.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] The sealing gasket is fixed on the valve core, and the whistling stop can be set between the valve core, the sealing gasket, or between the valve core and the sealing gasket. There is a gap between the sealing gasket and the valve core. The whistling stop can seal the gap between the valve core and the sealing gasket, preventing the high-speed gas flowing through the gap from making a whistling sound when the valve is opened. It also prevents the high-frequency vibration generated by the whistling from damaging the valve gasket assembly, thereby extending the service life of the valve gasket assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pressure regulating valve.

[0018] Figure 2 for Figure 1 Sectional view along the AA direction;

[0019] Figure 3 for Figure 2 A magnified view of region B in the middle;

[0020] Figure 4 A schematic diagram of the structure of one example of a sentry post;

[0021] Figure 5 A schematic diagram of another example of a sentry post;

[0022] Figure 6 Here is another example of a structural diagram of a sentry post.

[0023] In the figure: 10, pressure regulating valve; 100, valve gasket assembly; 110, valve seat; 120, valve core; 121, first contact surface; 130, sealing gasket; 131, second contact surface; 140, stop valve; 141, mounting part; 142, extension part; 150, valve stem. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and 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. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] In the prior art, the pressure regulating valve 10 typically has a cavity with gas flowing inside. The cavity also contains a valve seat 110 and a valve core 120, with a sealing gasket 130 on the valve core 120. If there is no whistling stop 140 between the valve core 120 and the sealing gasket 130, when the pressure regulating valve 10 is opened, the gas flows at a relatively high speed through the gap between the valve core 120 and the valve seat 110. Some of the gas will hit the inner wall of the cavity, changing the direction of the gas flow. The gas with the changed direction will rush into the gap between the valve core 120 and the sealing gasket 130, causing a whistling sound between the gas and the gap. The whistling sound is accompanied by high-frequency vibration, which causes significant damage to the sealing gasket 130, greatly reducing its service life. Moreover, the whistling noise is loud, increasing environmental pollution.

[0029] Therefore, based on the above analysis, this application provides a valve pad assembly 100 that can eliminate whistling. A whistling stop portion 140 is provided between the valve core 120 and the sealing gasket 130. When the pressure regulating valve 10 is open, the gas flows at a relatively high velocity through the gap between the valve core 120 and the valve seat 110. Although some gas will still collide with the inner wall of the cavity and change its flow direction, the whistling stop portion 140 blocks the gap between the valve core 120 and the sealing gasket 130, preventing the gas from entering the gap and thus solving the problem of whistling between the airflow and the gap. Figure 1 As shown, the valve pad assembly 100 is disposed inside the pressure regulating valve 10. The technical solution of this application optimizes the internal structure of the valve pad assembly 100, thereby solving the problem of whistling during the opening of the pressure regulating valve 10 and extending the service life of the valve pad assembly 100.

[0030] The structure of the valve pad assembly 100 provided in this application is as follows: Figure 2 As shown, the valve core 120 is driven by the valve stem 150, causing the valve core 120 and the valve seat 110 to abut against each other or move away from each other. The valve pad assembly 100 has a cavity inside that accommodates the valve seat 110 and the valve core 120. When the pressure regulating valve 10 is open, the valve core 120 moves away from the valve seat 110 under the drive of the valve stem 150, and there is a gap between them. The gas in the cavity flows through the gap. When the pressure regulating valve 10 is closed, the valve core 120 abuts against the valve seat 110 under the drive of the valve stem 150, and there is no gap between them. The gas in the cavity cannot flow through the gap, thus interrupting the gas flow.

[0031] A sealing gasket 130 is provided between the valve core 120 and the valve seat 110 to increase the sealing performance between them and prevent gas from escaping due to gaps between the valve seat 110 and the valve core 120 when the pressure regulating valve 10 is closed. The sealing gasket 130 is fixed to the valve core 120 by adhesive bonding. The valve core 120 has a first contact surface 121, and the sealing gasket 130 is in contact with the first contact surface 121. Figure 3 As shown, the stop part 140 is located on the side of the valve core 120 near the valve seat 110, so that when the pressure regulating valve is closed, the stop part 140 can block the gap between the valve core 120 and the sealing gasket 130.

[0032] The first contact surface 121 of the valve core 120 is circular, and the whistle-stopping part 140 is arranged around the first contact surface 121 and extends towards the valve seat 110. When the sealing gasket 130 is fixed on the valve core 120, the whistle-stopping part 140 can block the gap between the sealing gasket 130 and the valve core 120, so as to prevent the high-speed airflow from rushing into the gap between the sealing gasket 130 and the valve core 120 when the pressure regulating valve 10 is opened, thus preventing the whistle from being generated.

[0033] To clarify, the height of the stop part 140 is less than the thickness of the sealing gasket 130. If the height of the stop part 140 is greater than the thickness of the sealing gasket 130, the valve seat 110 will come into contact with the stop part 140 when the pressure regulating valve 10 is closed, which will affect the sealing performance of the pressure regulating valve 10. Therefore, the height of the stop part 140 needs to be limited to avoid contact between the valve seat 110 and the stop part 140. Since the height of the stop part 140 is related to the thickness of the sealing gasket 130, the height of the stop part 140 can be determined based on the thickness of the sealing gasket 130, and is not limited here.

[0034] The thickness of the whistle stop part 140 is 'a', and the value of 'a' is in the range of 1mm ≤ a ≤ 3mm, preferably 2mm. If the thickness of the whistle stop part 140 is greater than 3mm, the contact area between the valve seat 110 and the sealing gasket 130 will be reduced, resulting in a poorer sealing effect of the valve gasket assembly 100. Therefore, the whistle stop part 140 only needs to cover the gap between the sealing gasket 130 and the valve core 120. If the thickness of the whistle stop part 140 is less than 1mm, although the contact area between the valve seat 110 and the sealing gasket 130 will be increased, the thickness of the whistle stop part 140 is too small, resulting in the strength of the whistle stop part 140 not meeting the actual requirements. After long-term use, the whistle stop part 140 is prone to deformation or breakage.

[0035] In addition, the stop part 140 can be separately set from the valve core 120; firstly, the stop part 140 is machined, and then the stop part 140 is welded to the first contact surface 121 of the valve core 120. This machining method has a lower cost; or, a recess for accommodating the sealing gasket 130 is milled into the valve core 120, so that the periphery of the recess protrudes to form the stop part 140. This machining method eliminates the need for welding between the stop part 140 and the valve core 120, thereby increasing the connection strength between the valve core 120 and the stop part 140, avoiding gaps at the weld after long-term use, and reducing the difficulty of maintenance during use.

[0036] Based on the above analysis of the problems existing in the valve pad assembly 100, this application provides another improved structure, the specific structure of which is as follows: Figure 4 As shown, the stop whistle part 140 can also be separately disposed from the valve core 120. Both the stop whistle part 140 and the valve core 120 are made of metal, and the stop whistle part 140 and the valve core 120 can be made of the same metal. The stop whistle part 140 can be fixed to the valve core 120 by welding, as shown. Figure 5 As shown, the whistle-stopping part 140 includes a mounting part 141 and an extension part 142. The extension part 142 is disposed on the periphery of the mounting part 141, and the mounting part 141 is fixed on the valve core 120. The sealing gasket 130 fits against the mounting part 141, and the sealing gasket 130 and the extension part 142 are interference-fitted. On the one hand, this can increase the reliability of the sealing gasket 130 being fixed on the whistle-stopping part 140 and prevent the sealing gasket 130 from detaching from the whistle-stopping part 140. On the other hand, it reduces the gap between the sealing gasket 130 and the extension part 142, preventing gas from entering the gap and causing abnormal noise.

[0037] In addition, the mounting part 141 and the extension part 142 can be integrated. This integration reduces the processing difficulty of the whistle stop part 140 and ensures the connection strength between the mounting part 141 and the extension part 142. Alternatively, the mounting part 141 and the extension part 142 can be separate parts, processed separately, and then the extension part 142 can be fixed to the mounting part 141 by welding. This processing method saves more materials and reduces manufacturing costs.

[0038] Further explanation: The valve seat 110, valve core 120, and stop valve 140 are made of at least one of the following materials or a combination thereof: stainless steel, copper alloy, and carbon steel. The valve core 120 and stop valve 140 are preferably made of copper alloy. The advantage of using copper alloy is that it has good corrosion resistance, especially in humid, airy, and certain chemical environments, effectively resisting oxidation and corrosion, thereby extending the service life of the valve seat assembly 100. The valve seat 110 is preferably made of stainless steel. The valve seat 110 needs to have good strength, pressure resistance, and corrosion resistance, and stainless steel is particularly suitable for applications requiring corrosion resistance, high temperature resistance, and high strength.

[0039] Based on the above analysis of the problems existing in the valve gasket assembly 100, this application also provides a third improved structure, the specific solution of which is as follows: Figure 6 As shown, the whistle-stopping part 140 is disposed on the side of the sealing gasket 130 near the valve core 120, so that the whistle-stopping part 140 and the sealing gasket 130 can cover at least a portion of the valve core 120. The sealing gasket 130 is provided with a second contact surface 131, which is disposed near the valve core 120 and is in contact with the surface of the valve core 120. On the one hand, the whistle-stopping part 140 can block the gap between the sealing gasket 130 and the valve core 120; on the other hand, the sealing gasket 130... The whistle stop part 140 is integrally set with the whistle stop part 140, and the whistle stop part 140 and the sealing gasket 130 cover part of the valve core 120, so that the sealing gasket 130 and the whistle stop part 140 can be fixed to the valve core 120 without additional fixing methods. When the sealing gasket 130 is worn, it is also convenient for maintenance personnel to disassemble and replace it. At the same time, the gap between the sealing gasket 130 and the valve core 120 is blocked by the whistle stop part 140, which prevents airflow from entering the gap and producing a whistle when the valve gasket assembly 100 is opened.

[0040] In addition, the sealing gasket 130 and the stop part 140 can be made of rubber, preferably fluororubber. Fluororubber is resistant to high temperature and corrosion, suitable for harsh environments, and has excellent performance even at high temperatures. During the processing, the material is placed in a mold and manufactured by compression molding; then, pressure is applied in the mold to press the material into the required shape. This processing method facilitates mass production in the factory, eliminating the need for additional processing steps such as welding of the stop part 140 by assembly personnel. It is also more convenient to assemble the valve gasket assembly 100. The stop part 140 and the valve core 120 are interference-fitted to prevent loosening between the stop part 140 and the valve core 120, which would cause the sealing gasket 130 and the valve core 120 to detach from each other.

[0041] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A valve pad assembly capable of eliminating whistle noise, characterized in that, include: The valve core comprises a valve seat, a valve core, and a sealing gasket, wherein the valve core is disposed opposite to the valve seat, and the valve core is movable to drive the sealing gasket to press against or move away from the valve seat; A whistle-stopping part is disposed on the valve core, the sealing gasket, or between the valve core and the sealing gasket to cover the gap between the sealing gasket and the valve core.

2. The valve gasket assembly as claimed in claim 1, characterized in that, The valve core has a first contact surface, and the whistle stop is located on the peripheral edge of the first contact surface and protrudes in the direction of the valve seat relative to the first contact surface, so that the whistle stop surrounds the sealing gasket.

3. The valve gasket assembly as claimed in claim 2, characterized in that, The stop valve part is integrally formed with the valve core.

4. The valve pad assembly as claimed in claim 2, characterized in that, The whistle stop part is fixedly connected to the valve core by welding.

5. The valve gasket assembly as claimed in claim 1, characterized in that, The sentry stop includes: Mounting part, the mounting part is fixed on the valve core, and the sealing gasket is fixed on the mounting part; An extension is fixed to the peripheral edge of the mounting portion and extends in the direction of the valve seat to surround the sealing gasket.

6. The valve pad assembly as claimed in claim 5, characterized in that, The mounting part is fixedly connected to the valve core by welding.

7. The valve pad assembly as claimed in any one of claims 1-6, characterized in that, The height of the whistle stop is less than or equal to the thickness of the sealing gasket.

8. The valve pad assembly as claimed in claim 7, characterized in that, The thickness 'a' of the stop part is in the range of 1mm ≤ a ≤ 3mm.

9. The valve gasket assembly as claimed in claim 8, characterized in that, The valve seat, the valve core, and the stop valve are made of at least one of the following materials or a combination thereof: stainless steel, copper alloy, and carbon steel.

10. The valve pad assembly as claimed in claim 1, characterized in that, The sealing gasket has a second contact surface, and the whistle-stopping part is located on the peripheral edge of the second contact surface and protrudes in the direction of the valve core relative to the second contact surface, so that the whistle-stopping part covers at least a portion of the valve core.

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