Combined float type high-pressure air valve
By combining the design of a float-type high-pressure air valve with metal and plastic sealing parts, along with a buffer throttle valve and guide structure, the problem of traditional air valves being easily damaged under high pressure is solved, achieving reliable sealing and rapid response under high pressure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEYOU (SHANGHAI) INTELLIGENT TECH CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional air valves are easily crushed or torn under high pressure conditions, making it difficult to meet the high-pressure sealing requirements of turbine inlet valves.
The high-pressure air valve adopts a combined float type, combining a metal seal and a plastic seal. The metal seal is used for hard sealing, while the plastic seal provides buoyancy. It is equipped with a buffer throttle valve and a guide structure to ensure reliable sealing and rapid response of the valve under high pressure.
It achieves high sealing reliability under high pressure, rapid valve response, protection against impact, and extended equipment life, and is suitable for the air intake and exhaust functions of high-pressure pipelines.
Smart Images
Figure CN224107688U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to high pressure air valve technical field especially relates to combination pontoon type high pressure air valve. BACKGROUND
[0002] The air valve needs to be installed on the pipeline between the water inlet valve behind the water turbine unit of the hydropower station and the water turbine to meet the exhaust demand of the pipeline flushing of the water inlet valve bypass system, and the air suction demand of the pipeline drainage when the water inlet valve is closed and the drain valve is opened, to protect the safety of the pipeline, wherein the water pressure of the pipeline borne by the air valve can reach 64bar or even 100bar when the water turbine unit is normally working.
[0003] The traditional air valve adopts a thin-walled floating ball or a floating pontoon with a closed structure to sense the water buoyancy to achieve the purpose of closing the valve, and the sealing surface adopts a soft material such as rubber, wherein the thin-walled floating ball is easy to be crushed, and the rubber sealing ring is easy to be torn, so the traditional air valve is difficult to be applied to the high pressure working condition of more than 64bar. SUMMARY
[0004] The embodiment of the application provides a combination pontoon type high pressure air valve which can be well applied to the air inlet and outlet functions and sealing performance of the high pressure pipeline working condition, and protects the use safety of the pipeline.
[0005] The embodiment of the application provides a combination pontoon type high pressure air valve, which comprises a valve body, a valve cover and a valve rod, the valve body has opposite first and second ends, the second end is provided with a second channel for connecting the pipeline at the center position, the valve cover is connected to the first end, one end of the valve cover away from the valve body is connected with an upper cover, a buffer piston is installed in the upper cover, the valve rod extends along the axial direction of the valve body, one end of the valve rod is connected to the buffer piston, the opposite end of the valve rod extends into the valve cavity of the valve body and is coaxially connected with a combination pontoon, the combination pontoon comprises a metal sealing part and a plastic sealing part which are coaxially connected, the top end of the metal sealing part is connected to the valve rod and is provided with a conical structure matched with the bottom opening of the valve cover, and the bottom of the plastic sealing part is larger than the inner diameter of the second channel so as to seal the second channel.
[0006] In a possible implementation, the plastic sealing part is a solid engineering plastic body.
[0007] In a possible implementation, the bottom of the plastic sealing part is centrally and symmetrically provided with a plurality of mounting holes with respect to the central axis of the valve body, a fastening screw is arranged in the mounting hole, the fastening screw connects the plastic sealing part and the metal sealing part, and the mounting hole is opposite to the second channel.
[0008] In a possible implementation, the valve cover is provided with a shaft sleeve at a central position of one end close to the upper cover, and the shaft sleeve is sleeved on the valve rod in a sliding fit.
[0009] In a possible implementation, a guide structure is arranged in the valve cavity, and the guide structure is fixedly connected to the valve body and has a gap with the inner side wall of the valve body, and the guide structure is sleeved on the combined float in a sliding fit.
[0010] In a possible implementation, the guide structure is a ring-shaped guide frame, the outer peripheral side of the ring-shaped guide frame is connected to the valve body, the inner peripheral side of the ring-shaped guide frame is in a sliding fit with the combined float, and the ring-shaped guide frame is provided with a hollow gap between the outer peripheral side and the inner peripheral side.
[0011] In a possible implementation, the ring-shaped guide seat is in a sliding fit with the combined float, the ring-shaped guide seat is connected to the valve body at one side and has a gap with the inner side wall of the valve body at the opposite side.
[0012] In a possible implementation, a buffer throttle valve is mounted on the upper cover away from one end of the valve cover, and the buffer throttle valve is in communication with the upper cover cavity of the upper cover above the buffer piston.
[0013] In a possible implementation, the buffer throttle valve is an adjustable needle valve.
[0014] Advantages: Compared with the prior art, the combined float type high-pressure air valve provided by the application seals the bottom opening of the valve cover through the metal sealing part, and is not prone to being crushed and torn, and the plastic sealing part can not only withstand high pressure, but also float on water, and can provide a certain valve closing buoyancy, when air suction is needed, the combined float is quickly opened under the action of self-weight, and when air exhaust is needed, the combined float never rises before the air in the pipeline is completely exhausted, so that the valve is never closed, and the sealing reliability is better.
[0015] The shaft sleeve and the guide structure can play a double guiding role on the combined float, so that the combined float can accurately seal the second channel and accurately seal the pipeline.
[0016] The buffer throttle valve can adjust the size of the buffer piston damping, so as to reduce the impact of the air valve when closing under the action of high-pressure water flow after the air in the pipeline is exhausted.
[0017] These and other objects, features and advantages of the present application will become apparent with reference to the following detailed description. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1A front view schematic diagram of a sectional structure of a combined pontoon high-pressure air valve of the present application is shown.
[0019] Figure 2 A partial side view schematic diagram of a sectional structure of a combined pontoon high-pressure air valve of the present application is shown.
[0020] Figure 3 A schematic diagram of a sectional structure of a combined pontoon high-pressure air valve of the present application is shown in another embodiment. DETAILED DESCRIPTION
[0021] The following description is provided to enable any person skilled in the art to make and use the present application. The preferred embodiments in the following description are only examples of the present application and are not intended to limit the present application in any way. The principles defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.
[0022] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the above terms cannot be understood as a limitation of the present application.
[0023] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.
[0024] Reference Figure 1 and Figure 2The embodiment of the present application provides a combined float type high-pressure air valve, which comprises a valve body 10, a valve cover 20 and a valve rod 30, wherein the valve body 10 has opposite first and second ends, and the second end is provided with a second channel 101 for connecting a pipeline in the central position, the valve cover 20 is connected to the first end, and an upper cover 40 is connected to one end of the valve cover 20 away from the valve body 10, wherein a buffer piston 41 is arranged in the upper cover 40, the valve rod 30 extends along the axial direction of the valve body 10, one end of the valve rod 10 is connected to the buffer piston 41, and the opposite end of the valve rod 30 extends into a valve cavity 102 of the valve body 10 and is coaxially connected with a combined float 50. The combined float 50 comprises a metal sealing part 51 and a plastic sealing part 52 which are coaxially connected, the top end of the metal sealing part 51 is connected to the valve rod 30 and is provided with a tapered structure 53 matched with a bottom opening 201 of the valve cover 20, so that the metal hard sealing of the bottom opening 201 of the valve cover 20 can be realized, and the sealing reliability is better, and the bottom of the plastic sealing part 52 is larger than the inner diameter of the second channel 101, so that the second channel 101 can be sealed when the combined float 50 is attached to the bottom of the valve cavity 201.
[0025] The combined float type high-pressure air valve provided by the present application adopts the combined mode of the metal sealing part and the plastic sealing part, the metal sealing part 51 can seal the bottom opening 201 of the valve cover 20 in the mode of metal hard sealing, and the sealing reliability is high, and the plastic sealing part 52 can not only seal the second channel of the valve body 10, but also can float in water to provide a certain valve closing floating force, when air suction is needed, the combined float 50 is quickly opened under the action of the self-weight, and when air exhaust is needed, the combined float 50 never rises before the air in the pipeline is completely exhausted, and the valve is never closed, and the combined float type high-pressure air valve is especially suitable for ensuring the air inlet and outlet functions and sealing performance of the high-pressure pipeline under the working condition of more than 60 bar, and protecting the use safety of the pipeline.
[0026] In one embodiment, the plastic sealing part 52 is a solid engineering plastic body, and the pressure bearing capacity is stronger, so that the sealing effect on the second channel 101 can be improved.
[0027] Further preferably, the bottom of the plastic sealing part 52 is centrally symmetrically provided with a plurality of mounting holes 501, and the mounting holes 501 are provided with fastening screws 54, wherein the fastening screws 54 connect the plastic sealing part 51 and the metal sealing part 52, and the mounting holes 501 are opposite to the second channel 101, so as to facilitate the assembly and maintenance of the plastic sealing part 51 and the metal sealing part 52, and the mounting holes 501 can reduce the weight of the plastic sealing part 52 to some extent and provide a larger buoyancy. It should be noted that, regardless of the buoyancy provided by the plastic sealing part 52, the combined buoyant tube 50 still has a large gravity in the whole working process, so that the combined buoyant tube 50 can be quickly opened under the action of gravity when air suction is required.
[0028] In one embodiment, the valve cover 20 is provided with a shaft sleeve 21 at the center position of one end close to the upper cover 40, wherein the shaft sleeve 21 is sleeved on the valve rod 30 in a sliding fit manner, so as to ensure the accuracy of the moving direction of the valve rod 30 through the guiding action, and further ensure that the combined buoyant tube 50 can accurately seal the second channel 101.
[0029] Further preferably, the valve cavity 102 is provided with a guide structure. The guide structure is fixedly connected to the valve body 10 and has a gap with the inner side wall of the valve body 10, so as to ensure the up-down through of the valve cavity 102 in the valve body 10, and the guide structure is sleeved on the combined buoyant tube 50 in a sliding fit manner, so as to guide the combined buoyant tube 50 and double guide the guiding action of the shaft sleeve 21 on the valve rod 30, and the guiding effect is better. That is, the metal sealing part 51 and the plastic sealing part 52 have the same peripheral structure in the axial direction, the guide structure is sleeved on the metal sealing part 51 and the plastic sealing part 52 on the combined buoyant tube 50 at the same time, so that the combined buoyant tube 50 moves up and down in the guide structure and is guided by the guide structure.
[0030] In one embodiment, in combination Figure 3 , the guide structure is a ring-shaped guide frame 11. The outer periphery of the ring-shaped guide frame 11 is connected to the valve body 10, and the inner periphery of the ring-shaped guide frame 11 is sleeved on the combined buoyant tube 50 in a sliding fit manner, and the ring-shaped guide frame 11 is provided with a hollow gap 103 between the outer periphery and the inner periphery, so as to satisfy the up-down through of the valve cavity 102 and the guiding of the combined buoyant tube 50.
[0031] In another embodiment, the guide structure is a ring-shaped guide seat 12, wherein the ring-shaped guide seat 12 is in sliding fit with the combined float 50 to guide the combined float 50, and the ring-shaped guide seat 12 is connected to the valve body 10 at one side and has a gap with the inner side wall of the valve body 10 at the opposite side, which is a through gap to meet the through of the valve cavity 102.
[0032] In one embodiment, a buffer throttle valve 60 is installed at the end of the upper cover 40 away from the valve cover 20, wherein the buffer throttle valve 60 can be an adjustable needle valve. The buffer throttle valve 60 is in communication with the upper cover cavity 401 of the upper cover 40 above the buffer piston 41, so as to adjust the damping force of the buffer piston 41, thereby reducing the impact of the air valve when closing under the action of high-pressure water flow after the air in the pipeline is exhausted, and the protection effect is good, which can prolong the service life of the equipment.
[0033] It should be noted that the terms "first", "second" in the present application are only for the purpose of description, and do not represent any order, and cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.
[0034] Those skilled in the art should understand that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The advantages of the present application have been fully and effectively realized. The function and structural principle of the present application have been shown and described in the embodiments, and the implementation of the present application can be any modification or change without departing from the principle.
Claims
1. A combined float-type high-pressure air valve, comprising a valve body, a valve cover, and a valve stem, wherein the valve body has a first end and a second end opposite to each other, the second end has a second channel for connecting to a pipeline at its center, and the valve cover is connected to the first end, characterized in that, The valve cover is connected to a top cover at one end away from the valve body. A buffer piston is installed inside the top cover. The valve stem extends axially along the valve body. One end of the valve stem is connected to the buffer piston, and the other end of the valve stem extends into the valve cavity of the valve body and is coaxially connected to a combined float. The combined float includes a metal sealing part and a plastic sealing part coaxially connected. The top end of the metal sealing part is connected to the valve stem and has a tapered structure that matches the bottom opening of the valve cover. The bottom dimension of the plastic sealing part is larger than the inner diameter of the second channel to seal the second channel.
2. The combined float-type high-pressure air valve as described in claim 1, characterized in that, The plastic sealing part is a solid engineering plastic body.
3. The combined float-type high-pressure air valve as described in claim 2, characterized in that, The bottom of the plastic sealing part is symmetrically provided with multiple mounting holes centered on the central axis of the valve body. Each mounting hole is provided with a fastening screw, which connects the plastic sealing part and the metal sealing part. The mounting holes are directly opposite the second channel.
4. The combined float-type high-pressure air valve as described in claim 1, characterized in that, The valve cover has a bushing at the center of one end near the upper cover, and the bushing is slidably fitted onto the valve stem.
5. The combined float-type high-pressure air valve as described in claim 1 or 4, characterized in that, The valve cavity is provided with a guide structure, which is fixedly connected to the valve body and maintains a gap with the inner wall of the valve body. The guide structure is slidably fitted onto the combined float.
6. The combined float-type high-pressure air valve as described in claim 5, characterized in that, The guiding structure is an annular guide frame. The outer circumference of the annular guide frame is connected to the valve body, and the inner circumference of the annular guide frame is slidably engaged with the combined float. The annular guide frame has a hollow gap between the outer and inner circumferences.
7. The combined float-type high-pressure air valve as described in claim 5, characterized in that, The guiding structure is an annular guide seat, wherein the annular guide seat slides in conjunction with the combined float, the annular guide seat is connected to the valve body on one side, and maintains a gap with the inner wall of the valve body on the opposite side.
8. The combined float-type high-pressure air valve as described in claim 1, characterized in that, A buffer throttle valve is installed at the end of the upper cover away from the valve cover, and the buffer throttle valve is connected to the upper cover cavity of the upper cover above the buffer piston.
9. The combined float-type high-pressure air valve as described in claim 8, characterized in that, The buffer throttling valve is an adjustable needle valve.