Automatic liquid discharge device and method for gas pipeline

Abstract

This invention belongs to the field of aircraft gas pipeline maintenance technology, specifically relating to an automatic liquid draining device and method for gas pipelines. It includes a housing (1), an upper cover plate (2), a valve retaining ring (3), a drain valve (4), and a spring (5); the upper cover plate (2) is sealed and fixedly connected to the upper end of the housing (1); the structure is simple, with high water separation efficiency. When gas passes through, liquid water in the gas is separated using both centrifugal and gravity separation methods. When the gas path is open, the drain port closes under pressure to ensure a sealed gas path; when the gas path is closed, the drain port opens to automatically drain the liquid.

Description

Technical Field

[0001] This invention belongs to the field of aircraft gas pipeline maintenance technology, specifically relating to an automatic gas pipeline drainage device and method. Background Technology

[0002] Currently, most aircraft gas pipeline drainage devices use manual valves with liquid storage functions, requiring manual control of the valve to drain the liquid during each aircraft maintenance.

[0003] The disadvantages of the above structure are: long-term storage of liquid in the valve body can easily corrode the valve body, the liquid storage capacity is limited, the product is heavy, and manual liquid draining is required each time. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic liquid draining device and method for gas pipelines that is simple in structure, has high water separation efficiency, and requires no manual draining. When gas passes through, liquid water in the gas is separated using both centrifugal and gravity separation. When the gas path is open, the drain port closes under pressure to ensure a sealed gas path; when the gas path is closed, the drain port opens to automatically drain the liquid.

[0005] The technical solution of the present invention: According to a first aspect of the present invention, an automatic liquid draining device for a gas pipeline is provided, comprising a housing 1, an upper cover plate 2, a valve retaining ring 3, a drain valve 4, and a spring 5; the upper cover plate 2 is sealed and fixedly connected to the upper end of the housing 1; the inner diameter of the inner cavity of the housing 1 is in a four-stage stepped structure decreasing from top to bottom, respectively denoted as the first-stage stepped section 11, the second-stage stepped section 12, the third-stage stepped section 13, and the fourth-stage stepped section 14; the first-stage stepped section 11 is provided with an air inlet 15 and an air outlet 16 communicating with the outside; the height of the air outlet 16 is higher than that of the air inlet. The height position of the opening 15; the valve retaining ring 3 is set in the second-level step section 12, and its outer diameter is the same as the inner diameter of the second-level step section 12. The valve retaining ring 3 has a valve through hole in the center and a drain hole on the valve retaining ring 3; the drain valve 4 is set in the second-level step section 12, and its rod-shaped end passes through the valve through hole of the valve retaining ring 3, and the other end is in the shape of an end cap; the end cap of the drain valve 4 is compressed and positioned by the spring 5; the spring 5 is set in the third-level step section 13, and its diameter is the same as the inner diameter of the third-level step section 13.

[0006] In one possible embodiment, a sealing O-ring 6 is embedded on the contact surface between the end cap of the drain valve 4 and the housing 1.

[0007] In one possible embodiment, the height difference between the air inlet 15 and the air outlet 16 is at least 20 mm.

[0008] In one possible embodiment, the drain hole on the valve retaining ring 3 is a centrally symmetrical semi-circular waist-shaped hole.

[0009] In one possible embodiment, the housing 1 and the upper cover 2 are made of aluminum alloy.

[0010] In one possible embodiment, the valve retaining ring 3, the drain valve 4, and the spring 5 are made of stainless steel.

[0011] In one possible embodiment, the sealing O-ring 6 is made of elastic rubber.

[0012] According to a second aspect of the present invention, an automatic drainage method for a gas pipeline is provided, employing the aforementioned automatic drainage device for a gas pipeline, characterized by comprising the following process:

[0013] Gas is introduced into the housing 1. The gas enters tangentially along the inner cavity of the housing 1 through the air inlet 15, forming a swirling flow in the inner cavity of the housing 1. The liquid is separated by centrifugal force. At the same time, the gas pressure overcomes the thrust generated by the spring 5 and pushes the drain valve 4 downward, closing the drain valve 4 to ensure airtightness during the gas supply process. When the gas supply to the housing 1 is stopped, the spring 5 pushes the drain valve 4 upward, and the liquid is automatically discharged.

[0014] The advantages of this invention are: by optimizing the gas inlet and outlet channels, this invention separates the liquid using centrifugal force and gravity; the drain valve automatically opens to drain the liquid after the gas path is closed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an automatic liquid draining device for a gas pipeline according to a preferred embodiment of the present invention. Detailed Implementation

[0016] The invention will now be further described with reference to the accompanying drawings.

[0017] like Figure 1As shown, an automatic gas pipeline drainage device includes a housing 1, an upper cover plate 2, a valve retaining ring 3, a drainage valve 4, and a spring 5. The upper cover plate 2 is sealed and fixedly connected to the upper end of the housing 1. The inner diameter of the housing 1 has a four-stage stepped structure that decreases sequentially from top to bottom, referred to as the first-stage step 11, the second-stage step 12, the third-stage step 13, and the fourth-stage step 14. The first-stage step 11 has an air inlet 15 and an air outlet 16 that communicate with the outside. The height of the air outlet 16 is higher than the height of the air inlet 15. The valve retaining ring 3 is disposed within the second-stage stepped section 12, and its outer diameter is the same as the inner diameter of the second-stage stepped section 12. A valve through hole is provided in the center of the valve retaining ring 3, and a drain hole is also provided on the valve retaining ring 3. The drain valve 4 is disposed within the second-stage stepped section 12, with one rod-shaped end passing through the valve through hole of the valve retaining ring 3, and the other end being an end cap. The end cap-shaped end of the drain valve 4 is compressed and positioned by the spring 5. The spring 5 is disposed within the third-stage stepped section 13, and its diameter is the same as the inner diameter of the third-stage stepped section 13.

[0018] In one possible embodiment, a sealing O-ring 6 is embedded on the contact surface between the end cap of the drain valve 4 and the housing 1.

[0019] In one possible embodiment, the height difference between the air inlet 15 and the air outlet 16 is at least 20 mm.

[0020] In one possible embodiment, the drain hole on the valve retaining ring 3 is a centrally symmetrical semi-circular waist-shaped hole.

[0021] In one possible embodiment, the housing 1 and the upper cover 2 are made of aluminum alloy.

[0022] In one possible embodiment, the valve retaining ring 3, the drain valve 4, and the spring 5 are made of stainless steel.

[0023] In one possible embodiment, the sealing O-ring 6 is made of elastic rubber.

[0024] An automatic liquid drainage method for a gas pipeline, employing the aforementioned automatic liquid drainage device for a gas pipeline, is characterized by comprising the following processes:

[0025] Gas is introduced into the housing 1. The gas enters tangentially along the inner cavity of the housing 1 through the air inlet 15, forming a swirling flow in the inner cavity of the housing 1. The liquid is separated by centrifugal force. At the same time, the gas pressure overcomes the thrust generated by the spring 5 and pushes the drain valve 4 downward, closing the drain valve 4 to ensure airtightness during the gas supply process. When the gas supply to the housing 1 is stopped, the spring 5 pushes the drain valve 4 upward, and the liquid is automatically discharged.

Claims

1. An automatic liquid drainage device for a gas pipeline, characterized in that, The system includes a housing (1), a top cover (2), a valve retainer (3), a drain valve (4), and a spring (5); the top cover (2) is sealed and fixedly connected to the upper end of the housing (1); the inner diameter of the housing (1) is a four-stage stepped structure that decreases sequentially from top to bottom, referred to as the first-stage stepped section (11), the second-stage stepped section (12), the third-stage stepped section (13), and the fourth-stage stepped section (14); the first-stage stepped section (11) has an air inlet (15) and an air outlet (16) that communicate with the outside; the height of the air outlet (16) is higher than the height of the air inlet (15); the valve retainer (3) is located in the second-stage stepped section (12), and its outer diameter is the same as the inner diameter of the second-stage stepped section (12); the valve retainer (3) is located in the second-stage stepped section (12), and its outer diameter is the same as the inner diameter of the second-stage stepped section (12). The housing (1) has a valve through hole in the center and a drain hole on the valve retainer ring (3). The drain valve (4) is located in the second-stage stepped section (12), with one rod-shaped end passing through the valve through hole of the valve retainer ring (3) and the other end being an end cap. The end cap of the drain valve (4) is compressed and positioned by the spring (5). The spring (5) is located in the third-stage stepped section (13), and its diameter is the same as the inner diameter of the third-stage stepped section (13). When gas is introduced into the housing (1), the gas pressure overcomes the thrust generated by the spring (5) and pushes the drain valve (4) downward, closing the drain valve (4) and ensuring airtightness during the ventilation process. When the gas is stopped being introduced into the housing (1), the spring (5) pushes the drain valve (4) upward, and the liquid is automatically discharged.

2. The automatic liquid drainage device for gas pipelines according to claim 1, characterized in that, The end cap of the drain valve (4) is fitted with a sealing O-ring (6) on the contact surface between the valve and the housing (1).

3. The automatic liquid drainage device for gas pipelines according to claim 1, characterized in that, The height difference between the air inlet (15) and the air outlet (16) is at least 20 mm.

4. The automatic liquid drainage device for gas pipelines according to claim 1, characterized in that, The drain hole on the valve retainer ring (3) is a centrally symmetrical semi-circular waist-shaped hole.

5. The automatic liquid drainage device for a gas pipeline according to claim 1, characterized in that, The housing (1) and the top cover (2) are made of aluminum alloy.

6. The automatic liquid drainage device for a gas pipeline according to claim 1, characterized in that, The valve retaining ring (3), the drain valve (4), and the spring (5) are made of stainless steel.

7. The automatic liquid drainage device for a gas pipeline according to claim 2, characterized in that, The sealing O-ring (6) is made of elastic rubber.

8. A method for automatically draining liquid from a gas pipeline, employing the automatic liquid draining device for a gas pipeline as described in any one of claims 1-7, characterized in that, The process includes the following: Gas is introduced into the housing (1). The gas enters tangentially along the inner cavity of the housing (1) through the air inlet (15), forming a swirling flow in the inner cavity of the housing (1). The liquid is separated by centrifugal force. At the same time, the gas pressure overcomes the thrust generated by the spring (5) and pushes the drain valve (4) downward, closing the drain valve (4) to ensure airtightness during the ventilation process. When the gas is stopped being introduced into the housing (1), the spring (5) pushes the drain valve (4) upward, and the liquid is automatically discharged.

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