Gas-liquid two-phase medium exhaust valve

Abstract

This invention relates to the field of cryogenic medium transportation technology, specifically to a gas-liquid two-phase medium exhaust valve. The valve comprises: a medium cavity with medium pipelines at both its inlet and outlet; a sealing ball located near the outlet and a floating body located near the inlet within the medium cavity; the floating body having a larger volume than the sealing ball and being connected to it; when the floating body rises under the influence of the liquid medium, it moves the sealing ball upwards, causing it to compress and seal the outlet of the medium cavity, thus closing the outlet; when a gaseous medium is present in the medium cavity and accumulates at the top, the liquid level in the liquid medium drops under gas pressure, causing the floating body and sealing ball to move downwards, thereby opening the outlet; the floating body and sealing ball can automatically adjust their opening and closing according to the state of the medium within the cavity; when there is excessive gas in the cavity, the exhaust valve automatically opens without human intervention, allowing gas to escape, thus achieving automatic gaseous medium discharge.

Description

Technical Field

[0001] This invention relates to the field of cryogenic medium transportation technology, specifically to a gas-liquid two-phase medium exhaust valve. Background Technology

[0002] In cryogenic pipeline systems, the balance and regulation of the gas-liquid two-phase medium are crucial for ensuring stable system operation. Due to the significant differences in the flow characteristics of gas and liquid in the pipeline, the simultaneous presence of both gas and liquid often leads to pressure instability within the pipeline due to gas accumulation, thereby affecting the normal operation of the system.

[0003] Traditional gas-liquid separation and venting devices mostly employ simple gravity separation or mechanical valve structures. When dealing with complex two-phase gas-liquid media environments, these devices often suffer from poor sealing, slow response times, and high maintenance costs. Especially under low-temperature conditions, due to the thermal contraction of materials and the hardening of seals, traditional venting valves often fail to achieve effective sealing, leading to gas leakage and media waste.

[0004] Therefore, how to design an exhaust valve that can operate stably in a gas-liquid two-phase medium environment and has good sealing performance and fast response capability has become a technical problem that urgently needs to be solved in the field of underwater equipment and cryogenic pipeline systems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a gas-liquid two-phase medium exhaust valve, which aims to achieve automatic discharge of gaseous media in a medium cavity where gas and liquid two-phase media exist through ingenious structural design.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides a gas-liquid two-phase medium exhaust valve, including a medium cavity. Both the inlet and outlet of the medium cavity are provided with medium pipelines. A sealing ball is disposed on the side of the medium cavity near the outlet, and a floating body is disposed on the side near the inlet. The volume of the floating body is larger than that of the sealing ball and is connected to the sealing ball. When the floating body floats upward under the action of the liquid medium, it drives the sealing ball to move upward, causing the sealing ball to compress and block the outlet of the medium cavity, thus closing the outlet. When a gaseous medium is present in the medium cavity and accumulates at the upper part of the medium cavity, the liquid medium level drops under the action of gas pressure, causing the floating body and the sealing ball to move downward, thereby opening the outlet.

[0008] Furthermore, the floating body is a first float, the diameter of which is smaller than the inner diameter of the medium cavity but larger than the diameter of the sealing ball.

[0009] Furthermore, it also includes a connecting rod, through which the first float is connected to the sealing ball.

[0010] Furthermore, a constraint component is also provided inside the medium cavity, and a sealing ball is placed on the constraint component. The connecting rod is connected to the constraint component. During the process of sealing the outlet, the constraint component is used to constrain the movement path of the sealing ball, so that the sealing ball can accurately move to the position of sealing the outlet of the medium cavity.

[0011] Furthermore, the constraint component is a rotating rod with one end hinged to the inner wall of the medium cavity, and the other end of the rotating rod is hinged to the connecting rod. The sealing ball is located on the side of the rotating rod near the outlet of the medium cavity. The first float can drive the rotating rod to swing up and down through the connecting rod. The swinging of the rotating rod can drive the sealing ball to rotate up and down around the hinge point between it and the medium cavity, so that the sealing ball moves closer to or away from the outlet of the medium cavity.

[0012] Furthermore, a sealing ring is provided at the top of the medium cavity. The sealing ring is located between the medium cavity outlet and the sealing ball and is sealed to the medium cavity outlet. When the outlet is closed, the sealing ball squeezes the sealing ring to improve the sealing performance.

[0013] Furthermore, the sealing ring is made of PTFE.

[0014] Furthermore, the sealing ball is slidably mounted on the rotating rod and is circumferentially fixed to the rotating rod. Two fixing blocks are provided on the rotating rod to limit the sliding range of the sealing ball. The two fixing blocks are distributed on both sides of the sliding path of the sealing ball. A guide slope is provided on the bottom inner edge of the sealing ring. When the sealing ball moves and contacts the guide slope, under the squeezing action of the guide slope, the sealing ball can slide on the rotating rod to adjust its position so that the sealing ball can accurately seal the outlet of the medium cavity.

[0015] Furthermore, it also includes an outer shell, with the medium cavity fixedly installed inside the outer shell. The medium pipelines corresponding to the inlet and outlet of the medium cavity pass through the outer shell and are sealed to the outer shell. A vacuum interlayer space is formed between the medium cavity and the outer shell.

[0016] Furthermore, it also includes a vacuum pump mounted on the outer casing, and the outer casing is provided with a vacuum pumping connector that communicates with the vacuum interlayer space. The vacuum pump and the vacuum pumping connector are sealed together.

[0017] The present invention describes a two-phase gas-liquid medium exhaust valve and its control method, which has the following advantages: the floating body and the sealing ball can automatically adjust the opening and closing according to the state of the medium in the medium cavity. When there is too much gas medium in the cavity, the exhaust valve can automatically open without human intervention, allowing the gas to be discharged, thus realizing automatic discharge of gas medium. Attached Figure Description

[0018] Figure 1 This is a perspective view of the exhaust valve according to an embodiment of the present invention;

[0019] Figure 2 This is a partial structural schematic diagram of the exhaust valve according to an embodiment of the present invention;

[0020] Figure 3 These are enlarged views of the support rod and cross-sectional views of the rotating rod according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the second float in a sealed state according to an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Medium cavity; 11. First float; 12. Second float; 121. Support rod; 13. Connecting rod; 14. Rotating rod; 15. Fixing block; 16. Sealing ring; 2. Medium pipeline; 3. Outer shell; 31. Vacuum pump; 4. Vacuum interlayer space. Detailed Implementation

[0023] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0024] In the description of this application, 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," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] To further illustrate the principles and structure of the present invention, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, this embodiment of the invention provides a gas-liquid two-phase medium exhaust valve, which is installed on a cryogenic pipeline and includes: a medium cavity 1 having an inlet and an outlet, a sealing element and a floating body disposed in the medium cavity 1, the sealing element being connected to the floating body, the sealing element being located on the side near the outlet, the floating body being located on the side near the inlet, and the diameter of the sealing ball being larger than the diameter of the outlet of the medium cavity 1.

[0027] When the cryogenic pipeline connected to the exhaust valve is first opened, the initial medium entering the exhaust valve is gas. The sealing ball moves downward due to the weight of the floating body, opening the outlet of medium chamber 1 and allowing the gas to be discharged to the outside. When cryogenic liquid enters medium chamber 1 from the inlet, the liquid level gradually rises. The buoyancy of the liquid pushes the floating body upward, which in turn moves the sealing element upward, causing the sealing ball to squeeze and block the outlet of medium chamber 1, thus closing the outlet of medium chamber 1.

[0028] It should be noted that the volume of the floating body is larger than that of the seal. The purpose of this is that the floating body can generate greater buoyancy, while the small-volume seal has a smaller contact area with the outlet of the medium cavity 1. Compared with the large-volume seal, the small-volume seal can increase the pressure acting on the outlet when subjected to the same amount of buoyancy. Combining the floating body that generates great buoyancy with the seal that exerts great pressure can significantly enhance the sealing effect of the exhaust valve.

[0029] The aforementioned floating body and sealing ball can automatically adjust their opening and closing according to the state of the medium in the medium cavity 1. When there is too much gas medium in the cavity, the exhaust valve can automatically open without human intervention, allowing the gas to be discharged, thus realizing automatic discharge of gas medium.

[0030] Furthermore, the aforementioned sealing element can be a sealing ball or a sealing plug, and the sealing element of this application is preferably a sealing ball.

[0031] Furthermore, the aforementioned floating body can be of any shape, such as a cube, cuboid, or prism. Preferably, the floating body in this application is a sphere, specifically a first float 11. Spherical objects exhibit good stability in water due to their isotropic properties. This means that the floating body is less prone to tumbling or tilting when rising or falling in the liquid, thus enabling it to move the sealed ball more stably.

[0032] Furthermore, the aforementioned sealing ball is a second float ball 12. The buoyancy generated by the second float ball 12 itself, plus the buoyancy exerted by the first float ball 11 on the second float ball 12, can provide a greater sealing force for the outlet of the medium cavity 1, further enhancing the sealing effect of the exhaust valve.

[0033] Furthermore, as described above, the seal is connected to the floating body. Specifically, it also includes a connecting rod 13. The first float 11 is connected to the second float 12 through the connecting rod 13. The first float 11 floats up or down, which in turn drives the second float 12 to float up or down through the connecting rod.

[0034] Furthermore, a constraint component is also provided inside the medium cavity 1. The constraint component is used to constrain the movement path of the sealing ball, so that the first float ball 11 moves in a regular manner, thereby enabling the first float ball 11 to accurately move to the position of sealing the outlet of the medium cavity 1.

[0035] Specifically, the sealing ball is set on the constraint component, the connecting rod 13 is connected to the constraint component, the buoyancy of the first float 11 acts on the constraint component, causing the constraint component to move, and the constraint component causes the first float 11 to move regularly.

[0036] The aforementioned constraint component is a rotating rod 14 with one end hinged to the inner wall of the medium cavity 1. The rotating rod 14 is located on the side of the medium cavity 1 near the outlet and can rotate around its hinge point with the medium cavity 1. The other end of the rotating rod 14 is hinged to the connecting rod 13. The second float 12 is mounted on the rotating rod 14 via a support rod 121 and is located on the side of the medium cavity 1 near the outlet. When the first float 11 floats up or down, it can drive the rotating rod 14 to rotate up and down through the connecting rod 13. The up and down swing of the rotating rod 14 can drive the second float 12 to rotate up and down around its hinge point with the medium cavity 1, so that the second float 12 moves closer to or away from the outlet of the medium cavity 1. Since the second float 12 is small in size, the inner wall of the medium cavity 1 cannot constrain the second float 12. The constraint component prevents the second float 12 from moving randomly without constraint and ensures that the second float 12 can move to the position that blocks the outlet of the medium cavity 1.

[0037] Furthermore, a sealing ring 16 is provided at the top of the medium cavity 1. The sealing ring 16 is located between the outlet of the medium cavity 1 and the second float 12 and is sealed to the outlet of the medium cavity 1. When the outlet is closed, the second float 12 squeezes the sealing ring 16 to improve the sealing performance. The sealing ring 16 is made of PTFE material.

[0038] Furthermore, the second float 12 is slidably mounted on the rotating rod 14 via the support rod 121 and is circumferentially fixed to the rotating rod 14. The rotating rod 14 is provided with two fixing blocks 15 that limit the sliding range of the second float 12. The two fixing blocks 15 are distributed on both sides of the sliding path of the support rod 121 (or, in other words, the two fixing blocks 15 are distributed on both sides of the sliding path of the second float 12). The bottom inner edge of the sealing ring 16 is provided with a guide slope. When the second float 12 moves and contacts the guide slope, under the squeezing action of the guide slope, the second float 12 can slide on the rotating rod 14 to adjust its own position so that the second float 12 can accurately seal the outlet of the medium cavity 1.

[0039] Furthermore, it also includes a housing 3, and a medium cavity 1 is fixedly installed inside the housing 3. The inlet and outlet of the medium cavity 1 are provided with medium pipelines 2. The medium pipelines 2 pass through the housing 3 and are sealed to the housing 3, thereby forming a vacuum interlayer space 4 between the medium cavity 1 and the housing 3. The vacuum interlayer space 4 can effectively reduce the heat exchange between the medium cavity 1 and the external environment and maintain the temperature stability inside the medium cavity 1.

[0040] To create a vacuum between the medium cavity 1 and the outer shell 3, a vacuum pump 31 is also provided on the outer shell 3. The outer shell 3 is provided with a vacuum pumping connector that communicates with the interlayer space. The vacuum pump 31 is sealed to the vacuum pumping connector, and the operator can use the vacuum pump 31 to create a vacuum in the interlayer space.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A gas-liquid two-phase medium exhaust valve, characterized by, include: The medium cavity has medium pipelines at both its inlet and outlet. A sealing ball is located near the outlet, and a floating body is located near the inlet. The volume of the floating body is larger than that of the sealing ball and is connected to it. When the floating body floats upward under the action of the liquid medium, it moves the sealing ball upward, causing the sealing ball to squeeze and block the outlet of the medium cavity, thus closing the outlet. When there is gas in the medium cavity and the gas accumulates at the top of the medium cavity, the liquid level of the liquid medium drops under the action of gas pressure, causing the floating body and the sealing ball to move downward, thus opening the outlet. The floating body is the first float, whose diameter is smaller than the inner diameter of the medium cavity but larger than the diameter of the sealing ball; It also includes a connecting rod, through which the first float is connected to the sealing ball; The medium cavity is also equipped with a constraint component, and the sealing ball is set on the constraint component. The connecting rod is connected to the constraint component. During the process of sealing the outlet, the constraint component is used to constrain the movement path of the sealing ball, so that the sealing ball can move accurately to the position of sealing the outlet of the medium cavity.

2. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized by, The constraint component is a rotating rod with one end hinged to the inner wall of the medium cavity, and the other end of the rotating rod is hinged to the connecting rod. The sealing ball is located on the side of the rotating rod near the outlet of the medium cavity. The first float can drive the rotating rod to swing up and down through the connecting rod. The swinging of the rotating rod can drive the sealing ball to rotate up and down around the hinge point between it and the medium cavity, so that the sealing ball moves closer to or away from the outlet of the medium cavity.

3. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that, A sealing ring is provided at the top of the medium cavity. The sealing ring is located between the medium cavity outlet and the sealing ball and is sealed to the medium cavity outlet. When the outlet is closed, the sealing ball squeezes the sealing ring to improve the sealing performance.

4. The gas-liquid two-phase medium exhaust valve according to claim 3, characterized in that, The sealing ring is made of PTFE.

5. The gas-liquid two-phase medium exhaust valve according to claim 3, characterized in that, The sealing ball is slidably mounted on the rotating rod and is circumferentially fixed to the rotating rod. Two fixing blocks are provided on the rotating rod to limit the sliding range of the sealing ball. The two fixing blocks are distributed on both sides of the sliding path of the sealing ball. A guide slope is provided on the bottom inner edge of the sealing ring. When the sealing ball moves and contacts the guide slope, under the squeezing action of the guide slope, the sealing ball can slide on the rotating rod to adjust its position so that the sealing ball can accurately seal the outlet of the medium cavity.

6. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that, It also includes an outer shell, with the medium cavity fixedly installed inside the outer shell. The medium pipelines corresponding to the inlet and outlet of the medium cavity pass through the outer shell and are sealed to the outer shell. A vacuum interlayer space is formed between the medium cavity and the outer shell.

7. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that, It also includes a vacuum pump mounted on the housing, and the housing is provided with a vacuum pumping connector that communicates with the vacuum interlayer space. The vacuum pump and the vacuum pumping connector are sealed together.

Images