Gas-liquid two-phase medium exhaust valve

Abstract

The utility model belongs to the technical field of low-temperature medium conveying, and discloses a gas-liquid two-phase medium exhaust valve which comprises a valve body with an opening in the top end, a valve cover corresponding to the opening is arranged at the top end of the valve body, a gas outlet pipe is fixedly connected to one side of the upper surface of the valve cover, and a second moving rod is rotationally connected to the interior of the gas outlet pipe. A sealing piece is arranged on the surface of the second moving rod, a disc spring is installed on the upper side of the sealing piece, a first moving rod is slidably connected to the interior of the valve body, and a buoy is fixedly connected to the bottom end of the first moving rod. The sealing piece can be driven to be automatically opened or closed through the floating barrel and the protruding block, exhaust operation of the valve body is achieved, the auxiliary sealing gasket and the disc spring can assist in sealing of the air outlet pipe, the sealing performance of the device is further improved, the disc spring can provide continuous pre-tightening force, and when a low-temperature material shrinks cold, the sealing performance of the device is improved. And a gap generated due to size change can be automatically compensated, and tight attachment of a sealing surface is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of cryogenic medium transportation technology, specifically 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 media are crucial for ensuring stable system operation. Due to the significant differences in flow characteristics between gas and liquid in the pipeline, the simultaneous presence of both often leads to gas accumulation and pressure instability, thus affecting the system's normal operation. Traditional gas-liquid separation and venting devices mostly employ simple gravity separation or mechanical valve structures. These devices often suffer from poor sealing, slow response, and high maintenance costs when dealing with complex gas-liquid two-phase media environments. Especially under cryogenic conditions, due to the thermal contraction of materials and the hardening of seals, traditional venting valves often fail to achieve effective sealing, resulting in gas leakage and media waste.

[0003] Therefore, a gas-liquid two-phase medium exhaust valve is proposed to address the above problems. Utility Model Content

[0004] To address the problems mentioned in the background art, this utility model provides a gas-liquid two-phase medium exhaust valve with a sealing structure that has an elastic compensation function. When the material contracts at low temperatures, it can automatically compensate for the gap caused by dimensional changes, ensuring a tight fit of the sealing surface.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas-liquid two-phase medium exhaust valve, comprising a valve body with an opening at the top, a valve cover corresponding to the opening at the top of the valve body, an exhaust pipe fixedly connected to one side of the upper surface of the valve cover, a second moving rod rotatably connected inside the exhaust pipe, a sealing element provided on the surface of the second moving rod, a disc spring installed on the upper side of the sealing element, a first moving rod slidably connected inside the valve body, a float fixedly connected to the bottom end of the first moving rod, a connecting rod hinged to the bottom surface inside the valve cover via a hinge rod, and both the second moving rod and the first moving rod being movably connected to the connecting rod.

[0006] Preferably, both the second moving rod and the first moving rod are fixedly connected to protrusions on their sides, and the connecting rod has a connecting groove on the side of each of the two sets of protrusions, and the protrusions slide inside the connecting grooves.

[0007] Preferably, a spring is fixedly connected to the top end of the first moving rod, and an installation tube is fixedly connected to the side of the valve cover surface near the spring. The first moving rod is slidably disposed inside the installation tube, and a tube cap is screwed to the top end of the installation tube.

[0008] Preferably, the surface of the valve cover is fitted with several sets of fastening bolts arranged in a ring, and the valve cover is installed at the top opening of the valve body by means of the fastening bolts.

[0009] Preferably, an auxiliary sealing gasket is provided on the lower side of the seal, and a groove matching the auxiliary sealing gasket is opened on the outer wall surface of the second moving rod, and the auxiliary sealing gasket is installed on the outer surface of the second moving rod through this groove.

[0010] Preferably, the sealing element includes an inner sealing block that is fixedly connected to the circumference of the second moving rod and has a cylindrical structure. The inner sealing block has a T-shaped cross-section. An outer sealing block and the disc spring are sequentially sleeved on the outer wall of the inner sealing block from top to bottom. A limit block is provided on the upper side of the outer sealing block.

[0011] Preferably, the inner wall of the limiting block is provided with an internal thread, the outer wall of the second moving rod is provided with an external thread, and the limiting block is installed on the outer surface of the second moving rod through this thread.

[0012] Preferably, the upper sides of the outer sealing block and the auxiliary sealing gasket are both tapered structures, and a matching sealing groove is provided inside the air outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model uses a float and a protrusion to automatically open or close the seal, realizing the exhaust operation of the valve body. Through the auxiliary sealing gasket and disc spring, the auxiliary sealing gasket can assist in sealing the exhaust pipe, further increasing the sealing performance of the device. The disc spring can provide continuous preload force and automatically compensate for the gap caused by the size change when the material shrinks at low temperature, ensuring a tight fit of the sealing surface. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the valve body in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the first moving rod and the second moving rod in this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Valve body; 2. Valve cover; 3. Air outlet pipe; 4. Mounting pipe; 5. Pipe cap; 6. Fastening bolt; 7. Spring; 8. First moving rod; 9. Float; 10. Connecting rod; 11. Second moving rod; 12. Seal; 121. Inner sealing block; 122. Outer sealing block; 123. Limiting block; 13. Auxiliary sealing gasket; 14. Disc spring; 15. Protrusion. Detailed Implementation

[0020] 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.

[0021] like Figures 1 to 4 As shown, this utility model provides a gas-liquid two-phase medium exhaust valve, including a valve body 1 with an opening at the top, and a valve cover 2 corresponding to the opening at the top of the valve body 1. The valve cover 2 is characterized by: an exhaust pipe 3 fixedly connected to one side of its upper surface; a second moving rod 11 rotatably connected inside the exhaust pipe 3; a sealing element 12 on the surface of the second moving rod 11; a disc spring 14 mounted on the upper side of the sealing element 12; a first moving rod 8 slidably connected inside the valve body 1; a float 9 fixedly connected to the bottom end of the first moving rod 8; and a connecting rod 10 hinged to the bottom surface of the valve cover 2 via a hinge rod. Both the second moving rod 11 and the first moving rod 8 are connected to the connecting rod 10. 0. When there is air inside the valve body 1, the gas accumulates at the top of the valve body 1, causing the liquid level inside the valve body 1 to drop. The float 9 will move down synchronously with the liquid level and drive the second moving rod 11 to move up through the protrusion 15 and the connecting rod 10, pushing the seal 12 to open, so that the air inside the valve body 1 can be discharged through the vent pipe 3. After the gas is discharged, the water level rises, and the float 9 will also move with the liquid level, so that the vent pipe 3 will automatically close. It is connected to the seal 12 through the disc spring 14. The disc spring 14 can provide continuous preload force and can automatically compensate for the gap caused by the size change when the material is cold and shrinking, ensuring a tight fit of the sealing surface.

[0022] Both the second moving rod 11 and the first moving rod 8 have protrusions 15 fixedly connected to their sides, and the connecting rod 10 has a connecting groove on the side of the connecting rod 10 near the two sets of protrusions 15, and the protrusions 15 slide in the connecting grooves accordingly.

[0023] like Figures 1 to 4As shown, a spring 7 is fixedly connected to the top of the first moving rod 8, and an installation tube 4 is fixedly connected to the side of the valve cover 2 near the spring 7. The first moving rod 8 is slidably disposed inside the installation tube 4, and a tube cap 5 is screwed to the top of the installation tube 4. Several sets of fastening bolts 6 arranged in a ring array are installed on the surface of the valve cover 2, and the valve cover 2 is installed at the top opening of the valve body 1 by fastening bolts 6. The valve cover 2 can be removed by disassembling the fastening bolts 6, and the installation tube 4 can be opened by removing the tube cap 5, which facilitates the inspection or replacement of the components on the valve cover 2.

[0024] An auxiliary sealing gasket 13 is provided on the lower side of the sealing element 12. The outer wall surface of the second moving rod 11 is provided with a groove that matches the auxiliary sealing gasket 13. The auxiliary sealing gasket 13 is installed on the outer surface of the second moving rod 11 through this groove. When the second moving rod 11 drives the sealing element 12 to seal, the second moving rod 11 will synchronously drive the auxiliary sealing gasket 13 to move. The auxiliary sealing gasket 13 can assist in sealing and further increase the sealing performance of the device.

[0025] The sealing element 12 includes an inner sealing block 121 with a cylindrical structure that is fixedly connected to the circumference of the second moving rod 11. The inner sealing block 121 has a T-shaped cross-section. An outer sealing block 122 and a disc spring 14 are sequentially fitted onto the outer wall of the inner sealing block 121 from top to bottom. A limit block 123 is provided on the upper side of the outer sealing block 122. The inner wall of the limit block 123 has an internal thread, and the outer wall of the second moving rod 11 has an external thread. The limit block 123 is installed on the outer surface of the second moving rod 11 through this thread. Both the upper sides of block 122 and auxiliary sealing gasket 13 are conical structures, and the vent pipe 3 has a matching sealing groove inside. When the low-temperature material shrinks, the disc spring 14 will push the outer sealing block 122 to move, and then the outer sealing block 122 will slide on the surface of the inner sealing block 121. The sealing effect of the sealing element 12 is ensured by the inner sealing block 121 and the outer sealing block 122. The movement of the outer sealing block 122 can be limited by the limiting block 123 to prevent the outer sealing block 122 from separating from the inner sealing block 121.

[0026] Working principle and process: When there is air inside the valve body 1, the gas accumulates in the upper part of the valve body 1, causing the liquid level inside the valve body 1 to drop. The float 9 will move down synchronously with the liquid level and drive the second moving rod 11 to move up through the protrusion 15 and the connecting rod 10, pushing the seal 12 to open, so that the air inside the valve body 1 can be discharged through the vent pipe 3. After the gas is discharged, the water level rises, and the float 9 will also move with the liquid level, pushing the first moving rod 8 to overcome the elastic force of the spring 7 and drive the connecting rod 10 to flip. The second moving rod 11 pulls the disc spring 14 to fit against the inner wall of the vent pipe 3, so that the vent pipe 3 is automatically closed. At the same time, the second moving rod 11 will drive the auxiliary sealing gasket 13 to assist in sealing the vent pipe 3, further increasing the sealing performance of the device. The disc spring 14 is connected to the seal 12. The disc spring 14 can provide continuous pre-tightening force. When the material shrinks at low temperature, it can automatically compensate for the gap caused by the size change, ensuring a tight fit of the sealing surface.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid two-phase medium exhaust valve, comprising a valve body with an opening at the top, wherein a valve cover corresponding to the opening is provided at the top of the valve body, characterized in that: An air outlet pipe is fixedly connected to one side of the upper surface of the valve cover. A second moving rod is rotatably connected inside the air outlet pipe. A sealing element is provided on the surface of the second moving rod. A disc spring is installed on the upper side of the sealing element. A first moving rod is slidably connected inside the valve body. A float is fixedly connected to the bottom end of the first moving rod. A connecting rod is hinged to the bottom surface of the valve cover through a hinge rod. Both the second moving rod and the first moving rod are movably connected to the connecting rod.

2. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that: Both the second moving rod and the first moving rod have protrusions fixedly connected to their sides, and the connecting rod has a connecting groove on the side of each of the two sets of protrusions, and the protrusions slide inside the connecting grooves.

3. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that: A spring is fixedly connected to the top end of the first moving rod, and an installation tube is fixedly connected to the side of the valve cover surface near the spring. The first moving rod is slidably disposed inside the installation tube, and a tube cap is screwed to the top end of the installation tube.

4. The gas-liquid two-phase medium exhaust valve according to claim 3, characterized in that: The valve cover is fitted with several sets of fastening bolts arranged in a ring, and the valve cover is installed at the top opening of the valve body by means of the fastening bolts.

5. The gas-liquid two-phase medium exhaust valve according to claim 1, characterized in that: An auxiliary sealing gasket is provided on the lower side of the seal, and a groove matching the auxiliary sealing gasket is opened on the outer wall surface of the second moving rod, and the auxiliary sealing gasket is installed on the outer surface of the second moving rod through this groove.

6. The gas-liquid two-phase medium exhaust valve according to claim 5, characterized in that: The sealing element includes an inner sealing block that is fixedly connected to the circumference of the second moving rod and has a cylindrical structure. The inner sealing block has a T-shaped cross-section. An outer sealing block and the disc spring are sequentially fitted on the outer wall of the inner sealing block from top to bottom. A limit block is provided on the upper side of the outer sealing block.

7. A gas-liquid two-phase medium exhaust valve according to claim 6, characterized in that: The inner wall of the limiting block is provided with an internal thread, and the outer wall of the second moving rod is provided with an external thread. The limiting block is installed on the outer surface of the second moving rod through this thread.

8. A gas-liquid two-phase medium exhaust valve according to claim 6, characterized in that: The upper sides of both the outer sealing block and the auxiliary sealing gasket are tapered, and a matching sealing groove is provided inside the vent pipe.

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