Buoyancy valve for gas-liquid separator

Abstract

The utility model discloses a buoyancy valve for a gas-liquid separator, which comprises a valve body, a valve core and a valve rod, the valve core and the valve rod are arranged in the valve body, the valve rod is fixedly connected with the valve core, a closed cavity structure and a liquid discharge channel connected with the cavity are arranged in the valve body, and the liquid discharge channel is arranged at the bottom of the cavity. The buoyancy of the floating cavity is set to be larger than the sum of the gravity of the valve rod and the gravity of the valve element, after the cavity is filled with liquid, the floating cavity generates the buoyancy to lift the valve rod and drive the valve element to be opened, and after the liquid level in equipment is emptied, the floating cavity loses the buoyancy, and the valve element is closed through a gravity return seat; the cavity is connected to the downstream of the liquid phase separation end of the gas-liquid separator, a traditional engineering application scheme that liquid level, weight and flow interlocking closing is used for an equipment bottom valve can be replaced, and unpredictable events caused by misoperation when a measuring component or a control component in the valve breaks down can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of industrial technology, and more specifically to a buoyancy valve for a gas-liquid separator. Background Technology

[0002] In industries such as petroleum, chemical, food, and pharmaceutical, equipment that contains flammable liquids or whose processes require liquid sealing or prohibit gas from entering downstream units often has liquid sealing devices installed at the bottom discharge port. However, when the measuring instruments or automatic control valves of the equipment (such as gas-liquid separators) malfunction, it can lead to incorrect operation, resulting in unpredictable events or the inability to use the equipment for discharge processing. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to provide a stable liquid sealing device.

[0004] This utility model solves the above-mentioned technical problems through the following technical means: a buoyancy valve for a gas-liquid separator, including a valve body and a valve core and a valve stem disposed in the valve body, the valve stem and the valve core being fixedly connected, the valve body having a sealed cavity structure and a drain channel connected to the cavity, the drain channel being disposed at the bottom of the cavity, the cavity structure being connected to the liquid phase separation end of the gas-liquid separator, the valve stem having a float cavity, the buoyancy of the float cavity being greater than the sum of the weights of the valve stem and the valve core, the buoyancy of the float cavity being able to drive the valve core to move toward or away from the drain channel and cause the cavity to be connected to or closed with the drain channel, the valve body including a detachably connected upper shell and a lower shell.

[0005] As a preferred technical solution, the valve body is provided with at least two fixing pins, which slide in conjunction with the valve core.

[0006] As a preferred technical solution, the fixing pin includes a horizontal section and a vertical section. One end of the vertical section is fixedly connected to the inner wall of the valve body, and the other end is fixedly connected to the horizontal section.

[0007] As a preferred technical solution, the valve core has an annular protrusion at the end facing the drain channel, and the valve body wall has a sealing ring that matches the annular protrusion at the end facing the valve core.

[0008] As a preferred technical solution, the drainage channel is located inside the lower shell, and the upper shell and the lower shell are enclosed and fixed to form a closed cavity structure.

[0009] As a preferred technical solution, a drain hole is provided inside the lower housing, forming a drain channel.

[0010] As a preferred technical solution, the upper shell is provided with an inlet flange and the lower shell is provided with an outlet flange, and the inlet flange and the outlet flange are fastened together by bolts.

[0011] As a preferred technical solution, the valve stem includes a float cavity housing and a connecting rod. One end of the connecting rod is fixedly connected to the float cavity housing, and the other end is fixedly connected to the valve core. A float cavity is formed inside the float cavity housing.

[0012] As a preferred technical solution, the valve stem, valve core, and valve body axes are coaxial.

[0013] As a preferred technical solution, the valve core diameter is larger than the drainage channel diameter.

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

[0015] (1) In this utility model, by setting the buoyancy of the float cavity to be greater than the sum of the weight of the valve stem and the valve core, after the cavity is filled with liquid, the float cavity generates buoyancy to lift the valve stem and drive the valve core to open. When the liquid level in the equipment is emptied, the float cavity loses buoyancy, and the valve core returns to its seat and closes by gravity. The cavity is connected downstream of the liquid phase separation end of the gas-liquid separator, which can replace the traditional engineering application scheme of using the equipment bottom valve that is closed by interlocking liquid level, weight, and flow rate. It can avoid the occurrence of unpredictable events caused by malfunctions of the measuring or control components in the valve. The split structure design of the valve body is easy to disassemble.

[0016] (2) In this utility model, the valve body and valve core are manufactured using two flanges with different nominal diameters, namely the outlet flange and the inlet flange. Therefore, the valve can be installed and replaced quickly. Only the valve body and valve core connected to the lower flange need to be replaced. The current domestic flange manufacturing standard is HG20592. Therefore, this valve can be used with all series of equipment flange interfaces corresponding to this standard, and has strong practicality and feasibility. Attached Figure Description

[0017] Figure 1 A cross-sectional structural schematic diagram provided for an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the gas-liquid separator structure provided in an embodiment of the present invention;

[0019] Reference numerals: 1. Valve stem; 101. Float housing; 102. Float; 103. Connecting rod; 2. Valve core; 3. Fixing pin; 4. Upper housing; 5. Lower housing; 6. Inlet flange; 7. Outlet flange; 8. O-ring; 9. Annular protrusion; 10. Drain hole; 11. Gas-liquid separator. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] See Figure 1 , Figure 2 A buoyancy valve for a gas-liquid separator is connected downstream of the liquid phase separation end of the gas-liquid separator. It includes a valve stem 1, a valve core 2, and a valve body. A sealed cavity structure is provided within the housing, including the valve body and the valve core 2 and valve stem 1 housed within it. The valve stem 1 and valve core 2 are fixedly connected. The valve body contains a sealed cavity structure and a drain channel connected to this cavity. The drain channel is located at the bottom of the cavity. The cavity structure is connected downstream of the liquid phase separation end of the gas-liquid separator 11. In this embodiment, the buoyancy valve is connected to the bottom of the gas-liquid separator 11, which can prevent high-pressure gas from entering the low-pressure device due to the emptying of the liquid phase material inside the gas-liquid separator 11, thus preventing production safety accidents. This valve utilizes the principle of buoyancy to solve the problem of safe separation of gaseous and liquid phase materials separated within the gas-liquid separator under different operating conditions.

[0022] The gas-liquid separator 11 is connected to a gas phase output pipe at the top and a liquid phase output pipe at the bottom. At least one float cavity 102 is provided on the valve stem 1. In this embodiment, taking one float cavity 102 as an example, the buoyancy of the float cavity 102 is greater than the sum of the weight of the valve stem 1 and the valve core 2. If there are multiple float cavities 102, the buoyancy of the multiple float cavities 102 is greater than the sum of the weight of the valve stem 1 and the valve core 2. The buoyancy of the float cavity 102 can drive the valve core 2 to move toward or away from the drain channel and cause the cavity to be connected or closed with the drain channel.

[0023] See Figure 1 The valve stem 1 includes a float housing 101 and a connecting rod 103. The float 102 is opened inside the float housing 101. One end of the connecting rod 103 is fixedly connected to the float housing 101, and the other end is fixedly connected to the valve core 2. The float housing 101 is rectangular or square, the connecting rod 103 is round, and the valve core 2 is disc-shaped.

[0024] See Figure 1 , Figure 2The valve body includes an upper housing 4 and a lower housing 5 that are fixedly connected. In this embodiment, the upper housing 4 and the gas-liquid separator 11 are integrally formed. Alternatively, the gas-liquid separator 11 may have an opening at the bottom, with the outer edge of the opening fixedly connected to the top of the upper housing 4. The lower housing 5 has a drain hole 10, which forms a drain channel. The diameter of the drain hole 10 is smaller than the inner diameter of the cavity, so that the end of the drain hole 10 connected to the cavity is roughly stepped. After the upper housing 4 and the lower housing 5 are enclosed and fixed, the above-mentioned sealed cavity structure is formed. The upper housing 4 is circumferentially fixedly connected with an inlet flange 6, and the lower housing 5 is circumferentially fixedly connected with an outlet flange 7. The inlet flange 6 and the outlet flange 7 are fastened by bolts to achieve the fixation of the upper housing 4 and the lower housing 5 without reducing the use of flanges. The upper housing 4 and the lower housing 5 can be integrally formed.

[0025] It should be noted that the lower shell 5 and the outlet flange 7 can be integrally formed, and the upper shell 4 and the inlet flange 6 can be integrally formed. The valve body and valve core 2 are manufactured using two flanges with different nominal diameters, namely the outlet flange 7 and the inlet flange 6. Therefore, the valve can be installed and replaced quickly. Only the valve body and valve core 2 connected by the lower flange need to be replaced. The current domestic flange manufacturing standard is HG20592. Therefore, this valve can be used with all series of equipment flange interfaces corresponding to this standard, which has strong practicality and feasibility.

[0026] See Figure 1 The valve body is provided with a limiting component to limit the valve core 2. In this embodiment, the limiting component includes at least two fixing pins 3. The fixing pins 3 are slidably engaged with the valve core 2. The valve core 2 is provided with a through hole that matches the fixing pins 3. Of course, three or four or other numbers of fixing pins 3 can also be provided. The fixing pin 3 includes a horizontal section and a vertical section. One end of the vertical section is fixedly connected to the inner wall of the valve body, and the other end is fixedly connected to the horizontal section. The horizontal section and the inner wall of the lower housing 5 restrict the movement range of the valve core 2. The end of the valve core 2 facing the drain channel, i.e. the drain hole 10, is provided with an annular protrusion 9. The end of the inner wall of the valve body facing the valve core 2 is provided with a sealing ring that matches the annular protrusion 9. The sealing ring is an O-ring 8.

[0027] Working principle: By setting the buoyancy of the float cavity 102 to be greater than the sum of the weights of the valve stem 1 and the valve core 2, after the cavity is filled with liquid, the float cavity 102 generates buoyancy to lift the valve stem 1 and drive the valve core 2 to open. When the liquid level in the equipment is emptied, the float cavity 102 loses buoyancy, and the valve core 2 returns to its seat and closes by gravity. By connecting the cavity downstream of the liquid phase separation end of the gas-liquid separator, it can replace the traditional engineering application scheme of using the bottom valve of the equipment that uses liquid level, weight, and flow rate interlocking to close. It can avoid the occurrence of unpredictable events caused by malfunctions of the measuring or control components in the valve due to incorrect operation.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A buoyancy valve for a gas-liquid separator, comprising a valve body and a valve core and a valve stem disposed within the valve body, wherein the valve stem and the valve core are fixedly connected, characterized in that, The valve body has a sealed cavity structure and a drain channel connected to the cavity. The drain channel is located at the bottom of the cavity. The cavity structure is connected to the liquid phase separation end of the gas-liquid separator. The valve stem has a float cavity. The buoyancy of the float cavity is greater than the sum of the weight of the valve stem and the valve core. The buoyancy of the float cavity can drive the valve core to move toward or away from the drain channel, causing the cavity to be connected to or closed with the drain channel. The valve body includes a detachably connected upper shell and a lower shell.

2. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The valve body is provided with at least two fixing pins, which slide in conjunction with the valve core.

3. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The fixing pin includes a horizontal section and a vertical section. One end of the vertical section is fixedly connected to the inner wall of the valve body, and the other end is fixedly connected to the horizontal section.

4. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The valve core has an annular protrusion at the end facing the drain channel, and a sealing ring that matches the annular protrusion is provided on the inner wall of the valve body at the end facing the valve core.

5. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The drainage channel is located inside the lower shell, and the upper shell and the lower shell are enclosed and fixed to form a closed cavity structure.

6. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, A drain hole is provided inside the lower shell, forming a drain channel.

7. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The upper shell is equipped with an inlet flange, and the lower shell is equipped with an outlet flange. The inlet flange and the outlet flange are detachably connected and fastened by bolts.

8. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The valve stem includes a float housing and a connecting rod. One end of the connecting rod is fixedly connected to the float housing, and the other end is fixedly connected to the valve core. A float cavity is provided inside the float housing.

9. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The valve stem, valve core, and valve body are coaxial.

10. The buoyancy valve for a gas-liquid separator according to claim 1, characterized in that, The valve core diameter is larger than the drainage channel diameter.

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