A liquid drainage device

Abstract

This utility model provides a liquid drainage device, including a liquid storage tank, a conical cylinder installed at the lower end of the liquid storage tank, a drain valve installed at the lower end of the conical cylinder, an inlet / outlet gas fitting installed on the upper surface of the liquid storage tank, a float slidably installed inside the liquid storage tank, a plurality of vertical holes evenly opened on the upper surface of the float, a connecting rod installed at the middle position of the lower surface of the float, and a plug for sealing the connection between the conical cylinder and the drain valve installed at the lower end of the connecting rod. The plug has a conical structure that is wider at the top and narrower at the bottom. This utility model has the following beneficial effects: it avoids natural gas leakage due to the drain valve not being closed in time, eliminating safety risks such as combustion and explosion from the source.

Description

Technical Field

[0001] This utility model is a liquid drainage device, belonging to the field of natural gas transportation technology. Background Technology

[0002] In long-distance natural gas transmission systems, gas-liquid separators are crucial equipment for ensuring safe and efficient transmission. During extraction and transportation, natural gas carries formation water, condensate, and other moisture. If these liquids accumulate in the pipeline over a long period, they can lead to pipeline corrosion, increased pressure drop, and even affect the normal operation of downstream equipment. Therefore, installing gas-liquid separators at key nodes in the pipeline allows for the separation of moisture from gas through centrifugal separation and gravity settling, achieving gas-liquid separation. Gas-liquid separators are typically equipped with a drain valve at the bottom, whose core function is to periodically drain the separated moisture, maintaining the separator's normal operating efficiency. Because the internal structure of the gas-liquid separator is enclosed, operators cannot directly observe the real-time moisture level inside the separator.

[0003] When opening the drain valve to drain liquid, the operator can only rely on experience to judge the drainage time or by feeling the state of the drained liquid. If the operator fails to close the drain valve in time when all the water in the separator has been drained, high-pressure natural gas will leak directly through the drain valve. Natural gas is highly flammable and can easily spread rapidly in the surrounding environment after leakage, forming an explosive mixture. Once it encounters an ignition source such as an open flame or static electricity, it may cause a combustion or explosion accident, which will not only cause equipment damage and waste of natural gas resources, but also pose a serious threat to the personal safety of on-site operators, and may also have adverse effects on the surrounding ecological environment. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a liquid drainage device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a liquid drainage device, comprising: A liquid storage cylinder has a conical cylinder installed at its lower end, and a drain valve is installed at the lower end of the conical cylinder; Air inlet and outlet components are installed on the upper surface of the liquid storage tank; A floating plate is slidably installed inside a liquid storage tank. Multiple vertical holes are evenly distributed on the upper surface of the floating plate. A connecting rod is installed at the middle of the lower surface of the floating plate. A plug for sealing the connection between the conical cylinder and the drain valve is installed at the lower end of the connecting rod. The plug is a conical structure that is wider at the top and narrower at the bottom.

[0006] Furthermore, the air inlet / outlet component includes a vertical cylinder. The vertical cylinder is installed at the middle position of the upper surface of the liquid storage cylinder. A detachable cylinder cover is installed at the upper end of the vertical cylinder. An air inlet pipe is installed on the outer surface of the cylinder cover. One end of the air inlet pipe extends to the lower part of the vertical cylinder. An air outlet pipe is installed on the outer surface of the cylinder cover away from the air inlet pipe.

[0007] Furthermore, the end of the air inlet pipe inside the vertical cylinder is closed, and the outer surface of the end of the air inlet pipe near the liquid storage cylinder is uniformly machined with multiple small holes. The air inlet pipe is fitted with a spiral blade that is connected and fixed to the air inlet pipe, and the spiral blade is located on the upper side of the small holes.

[0008] Furthermore, a perforated disc is installed at the upper part of the vertical cylinder, and the perforated disc is sleeved on the air outlet pipe.

[0009] Furthermore, the upper end of the vertical cylinder is fitted with a lower flange that is fixed to the vertical cylinder, the lower end of the cylinder cover is fitted with an upper flange, the upper flange is connected to the lower flange by multiple sets of bolts, the end of the air inlet pipe away from the small hole is fitted with an air inlet flange, and the end of the air outlet pipe away from the cylinder cover is fitted with an air outlet flange.

[0010] Furthermore, a limiting ring is installed on the upper part of the outer surface of the liquid storage cylinder, and two interconnected semicircular plates are provided on the lower side of the limiting ring. Each of the two semicircular plates has a support lug at the middle of its outer surface, and a rope hole is provided on one side of the support lug. A suspension rope for tying to the gas pipeline is inserted into the rope hole.

[0011] Furthermore, both ends of the semicircular plate are fixed with connecting lugs, and the connecting lugs on the two semicircular plates are connected by bolts.

[0012] Furthermore, an upper blind hole is formed by a recess in the middle of the lower surface of the floating roof, and a lower blind hole is formed by a recess in the middle of the upper surface of the plug. The two ends of the connecting rod are respectively installed in the upper blind hole and the lower blind hole.

[0013] The beneficial effects of this utility model are: The float inside the storage tank slides up and down with the liquid level. When the liquid is sufficient, the float rises and, through a connecting rod, moves the plug out of the sealed position, allowing the liquid to flow smoothly through the drain valve. After some of the liquid has been drained, the float descends with the liquid level until the plug seals the connection between the conical cylinder and the drain valve, automatically cutting off the natural gas passage. At this point, there is still some liquid in the conical cylinder, which acts as a seal to prevent natural gas from leaking out of the drain valve. There is no need for manual monitoring of the liquid level, thus avoiding natural gas leakage due to the drain valve not being closed in time, eliminating safety risks such as combustion and explosion at the source. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a liquid drainage device according to the present invention; Figure 2 This is another perspective view of the liquid drainage device of this utility model; Figure 3 This is a partial cross-sectional view of a liquid drainage device according to the present invention; Figure 4 This is an exploded structural diagram of a liquid drainage device according to the present invention; In the picture: 1. Liquid storage tank; 11. Conical cylinder; 12. Drain valve; 13. Limiting ring; 2. Vertical cylinder; 21. Cylinder cover; 22. Inlet pipe; 23. Outlet pipe; 24. Lower flange; 25. Upper flange; 26. Spiral blade; 27. Small hole; 3. Semicircular plate; 31. Support lug; 32. Suspension rope; 33. Connecting lug; 34. Rope threading hole; 4. Perforated disc; 5. Floating roof; 51. Vertical hole; 52. Connecting rod; 53. Plug. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figures 1-4 This utility model provides a technical solution: a liquid drainage device, including a liquid storage cylinder 1, a conical cylinder 11 installed at the lower end of the liquid storage cylinder 1, and a drain valve 12 installed at the lower end of the conical cylinder 11; a vertical cylinder 2 is installed at the middle position of the upper surface of the liquid storage cylinder 1, and a detachable cylinder cover 21 is installed at the upper end of the vertical cylinder 2; a lower flange 24 is fitted onto the upper end of the vertical cylinder 2 and fixedly connected to the vertical cylinder 2, and an upper flange 25 is installed at the lower end of the cylinder cover 21. The upper flange 25 is connected to the lower flange 24 by multiple sets of bolts, which facilitates the disassembly and assembly of the cylinder cover 21 and the vertical cylinder 2.

[0017] An air inlet pipe 22 is installed on the outer surface of the cylinder cover 21. One end of the air inlet pipe 22 extends to the lower part of the vertical cylinder 2. An air outlet pipe 23 is installed on the outer surface of the cylinder cover 21 away from the air inlet pipe 22. An air inlet flange is installed at the end of the air inlet pipe 22 away from the small hole 27. An air outlet flange is installed at the end of the air outlet pipe 23 away from the cylinder cover 21. The design of the air inlet flange and the air outlet flange facilitates the connection of the air inlet pipe 22 and the air outlet pipe 23 to the gas transmission pipeline.

[0018] The inlet pipe 22 is closed at one end inside the vertical cylinder 2. Multiple small holes 27 are uniformly machined on the outer surface of the end of the inlet pipe 22 near the liquid storage cylinder 1. A spiral blade 26, connected and fixed to the inlet pipe 22, is fitted onto the inlet pipe 22. The spiral blade 26 is positioned above the small holes 27. A perforated disc 4 is installed at the upper part of the vertical cylinder 2, fitted onto the outlet pipe 23. The perforated disc 4 supports the outlet pipe 23 without affecting the flow of natural gas. Natural gas first flows into the vertical cylinder 2 through the small holes 27 on the inlet pipe 22, and then moves upward along the spiral path of the spiral blade 26, increasing the flow time of the natural gas within the vertical cylinder 2. This facilitates the entry of the liquid in the natural gas into the container formed by the conical cylinder 11 and the liquid storage cylinder 1 under its own gravity.

[0019] See Figures 1-4 The float 5 is slidably installed inside the liquid storage cylinder 1. Multiple vertical holes 51 are evenly opened on the upper surface of the float 5. A connecting rod 52 is installed at the middle position of the lower surface of the float 5. A plug 53 for sealing the connection between the conical cylinder 11 and the drain valve 12 is installed at the lower end of the connecting rod 52. The plug 53 has a conical structure that is wider at the top and narrower at the bottom. An upper blind hole is formed by a recess in the middle position of the lower surface of the float 5, and a lower blind hole is formed by a recess in the middle position of the upper surface of the plug 53. The two ends of the connecting rod 52 are respectively installed in the upper blind hole and the lower blind hole, which improves the stability of the connection between the connecting rod 52 and the float 5 and the plug 53. The float 5 inside the storage tank 1 slides up and down with the change of the liquid level. When the liquid is sufficient, the float 5 floats up and drives the plug 53 to disengage from the sealed position through the connecting rod 52, so that the liquid can be discharged smoothly through the drain valve 12. After a portion of the liquid is discharged, the float 5 descends with the liquid level until the plug 53 seals the connection between the conical cylinder 11 and the drain valve 12, automatically cutting off the natural gas passage. At this time, there is still some liquid in the conical cylinder 11, which plays a sealing role and prevents natural gas from being discharged from the drain valve 12. There is no need for manual monitoring of the liquid level, and natural gas is prevented from leaking due to the drain valve 12 not being closed in time, thus eliminating the safety risks of combustion and explosion from the source.

[0020] See Figures 1-4 A limiting ring 13 is installed on the upper part of the outer surface of the liquid storage cylinder 1. Two interconnected semicircular plates 3 are provided on the lower side of the limiting ring 13. Both ends of the semicircular plates 3 are fixed with connecting ears 33. The connecting ears 33 on the two semicircular plates 3 are connected by bolts to complete the assembly of the two semicircular plates 3. A support ear 31 is installed in the middle of the outer surface of the two semicircular plates 3. One side of the support ear 31 has a rope hole 34. A hanging rope 32 for tying to the gas pipeline is inserted into the rope hole 34. One end of the hanging rope 32 is tied in the rope hole 34, and the other end is tied to the gas pipeline connected to the vertical cylinder 2. This serves to support the liquid storage cylinder 1 and the conical cylinder 11 and other components, and reduce the load on the connection between the gas inlet pipe 22, the gas outlet pipe 23 and the gas pipeline.

[0021] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for draining accumulated liquid, characterized in that, include: A liquid storage cylinder (1) has a conical cylinder (11) installed at its lower end, and a drain valve (12) is installed at the lower end of the conical cylinder (11). The air inlet and outlet are installed on the upper surface of the liquid storage cylinder (1); A floating plate (5) is slidably installed inside a liquid storage cylinder (1). Multiple vertical holes (51) are evenly opened on the upper surface of the floating plate (5). A connecting rod (52) is installed in the middle of the lower surface of the floating plate (5). A plug (53) for sealing the connection between the conical cylinder (11) and the drain valve (12) is installed at the lower end of the connecting rod (52). The plug (53) is a conical structure that is wider at the top and narrower at the bottom.

2. The liquid drainage device according to claim 1, characterized in that: The air inlet and outlet components include a vertical cylinder (2). The vertical cylinder (2) is installed at the middle of the upper surface of the liquid storage cylinder (1). A detachable cylinder cover (21) is installed at the upper end of the vertical cylinder (2). An air inlet pipe (22) is installed on the outer surface of the cylinder cover (21). One end of the air inlet pipe (22) extends to the lower part of the vertical cylinder (2). An air outlet pipe (23) is installed on the outer surface of the cylinder cover (21) away from the air inlet pipe (22).

3. The liquid drainage device according to claim 2, characterized in that: The air inlet pipe (22) is closed at one end inside the vertical cylinder (2). The outer surface of the end of the air inlet pipe (22) near the liquid storage cylinder (1) is uniformly machined with multiple small holes (27). The air inlet pipe (22) is fitted with a spiral blade (26) that is connected and fixed to the air inlet pipe (22). The spiral blade (26) is located on the upper side of the small holes (27).

4. The liquid drainage device according to claim 3, characterized in that: A perforated disc (4) is installed in the upper part of the vertical cylinder (2), and the perforated disc (4) is sleeved on the air outlet pipe (23).

5. The liquid drainage device according to claim 4, characterized in that: The upper end of the vertical cylinder (2) is fitted with a lower flange (24) that is fixed to the vertical cylinder (2). The lower end of the cylinder cover (21) is fitted with an upper flange (25). The upper flange (25) is connected to the lower flange (24) by multiple sets of bolts. The end of the air inlet pipe (22) away from the small hole (27) is fitted with an air inlet flange. The end of the air outlet pipe (23) away from the cylinder cover (21) is fitted with an air outlet flange.

6. The liquid drainage device according to claim 1, characterized in that: A limiting ring (13) is installed on the upper part of the outer surface of the liquid storage cylinder (1). Two interconnected semicircular plates (3) are provided on the lower side of the limiting ring (13). A support lug (31) is installed at the middle of the outer surface of the two semicircular plates (3). A rope hole (34) is opened on one side of the support lug (31). A hanging rope (32) for tying to the gas pipeline is inserted into the rope hole (34).

7. The liquid drainage device according to claim 6, characterized in that: Both ends of the semicircular plate (3) are connected and fixed with connecting ears (33), and the connecting ears (33) on the two semicircular plates (3) are connected by bolts.

8. The liquid drainage device according to claim 1, characterized in that: The lower surface of the floating plate (5) is recessed at the middle to form an upper blind hole, and the upper surface of the plug (53) is recessed at the middle to form a lower blind hole. The two ends of the connecting rod (52) are respectively installed in the upper blind hole and the lower blind hole.

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