CN115638307A - Automatic liquid drainage device and method for gas pipeline - Google Patents

Abstract

The invention belongs to the technical field of aircraft gas pipeline maintenance, and in particular relates to an automatic liquid draining device and method for a gas pipeline. It includes a housing (1), an upper cover (2), a valve retainer (3), a liquid discharge valve (4), and a spring (5); the upper cover (2) and the upper end of the housing (1) Sealed and fixed connection; simple structure, high water separation efficiency. When the gas passes through, the liquid water in the gas is separated by centrifugal separation and gravity separation. When the gas path is ventilated, the liquid outlet is closed under pressure to ensure the gas path Sealed, when the air circuit is closed, the drain port is opened to automatically drain.

Description

A device and method for automatic liquid discharge of gas pipeline

technical field

The invention belongs to the technical field of aircraft gas pipeline maintenance, and in particular relates to an automatic liquid draining device and method for a gas pipeline.

Background technique

At present, the gas pipeline liquid discharge device on the aircraft mostly uses a manual valve body with a liquid storage function. It is necessary to manually control the opening of the valve every time the aircraft is maintained to discharge the liquid in it.

The disadvantages of the above structure are: the liquid stored in the valve body for a long time is easy to corrode the valve body, the liquid storage is limited, the product is heavy, and the liquid needs to be drained manually each time.

Contents of the invention

The object of the present invention is to propose an automatic liquid draining device and method for a gas pipeline with simple structure, high water separation efficiency and no need for manual liquid draining. When the gas passes through, centrifugal separation and gravity separation are used to separate the liquid water in the gas. When the gas path is ventilated, the liquid outlet is closed under pressure to ensure the gas path is sealed. When the gas path is closed, the liquid outlet is opened. Automatic draining.

The technical solution of the present invention: according to the first aspect of the present invention, an automatic liquid drainage device for gas pipelines is provided, including a housing 1, an upper cover plate 2, a valve retaining ring 3, a liquid discharge valve 4, and a spring 5; The upper cover plate 2 is sealed and fixedly connected with the upper end of the housing 1; the inner diameter of the housing 1 is in a four-stage descending ladder structure from top to bottom, which are respectively recorded as the first step section 11 and the second step section 11. Section 12, the third step section 13, and the fourth step section 14; the first step section 11 is provided with an air inlet 15 and an air outlet 16 communicating with the outside world; the height position of the air outlet 16 is Higher than the height position of the air inlet 15; the valve stop ring 3 is arranged in the second step section 12, and its outer diameter is the same as the inner diameter of the second step section 12, and the valve There is a valve through hole in the center of the retaining ring 3, and a drain hole is also opened on the valve retaining ring 3; the drain valve 4 is arranged in the second step section 12, and one end of the rod-shaped end passes through the The other end of the valve through hole of the valve retaining ring 3 is in the shape of an end cap; the end of the liquid discharge valve 4 is in the shape of an end cap and is positioned by the compression of the spring 5; the spring 5 is arranged on the third step section 13, its diameter is the same as the inner diameter of the third step section 13.

In a possible embodiment, a sealing O-ring 6 is inlaid on the contact surface between the end cap-shaped end of the liquid discharge valve 4 and the housing 1 .

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

In a possible embodiment, the drain hole on the valve stop ring 3 is a centrally symmetrical semicircular waist-shaped hole.

In a possible embodiment, the housing 1 and the upper cover 2 are made of aluminum alloy.

In a possible embodiment, the valve stop ring 3, the liquid discharge valve 4, and the spring 5 are made of stainless steel.

In a possible embodiment, the sealing O-ring 6 is made of elastic rubber.

According to the second aspect of the present invention, a method for automatic liquid drainage of a gas pipeline is proposed, using the above-mentioned automatic liquid drainage device for a gas pipeline, which is characterized in that it includes the following process:

The gas is introduced into the housing 1, and the gas is fed in along the tangent line of the inner cavity of the housing 1 from the air inlet 15, forming a swirl flow in the inner cavity of the housing 1, separating the liquid by centrifugal force, and at the same time, the gas pressure overcomes the The thrust generated by the spring 5 will push the liquid discharge valve 4 downward, and the liquid discharge valve 4 will be closed to ensure the airtightness during the ventilation process; stop the gas into the housing 1, and the spring 5 will push the liquid discharge valve 4 upward, The liquid is automatically drained.

The advantages of the present invention are: the present invention utilizes the centrifugal force and the gravity to separate the liquid by optimizing the gas inlet and outlet channels; the liquid discharge valve automatically opens to discharge liquid after the gas circuit is closed.

Description of drawings

Fig. 1 is a schematic structural diagram of a gas pipeline automatic liquid draining device according to a preferred embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, an automatic liquid draining device for a gas pipeline includes a housing 1, an upper cover plate 2, a valve retaining ring 3, a liquid discharge valve 4, and a spring 5; the upper cover plate 2 and the housing 1. The upper end is sealed and fixedly connected; the inner diameter of the inner cavity of the housing 1 is in a four-step decreasing ladder structure from top to bottom, which are respectively recorded as the first step section 11, the second step section 12, and the third step section 13 , the fourth step section 14; the first step section 11 is provided with an air inlet 15 and an air outlet 16 communicating with the outside world; the height of the air outlet 16 is higher than that of the air inlet 15 The height position; the valve retaining ring 3 is arranged in the second step section 12, and its outer diameter is the same as the inner diameter of the second step step section 12, and the center of the valve retaining ring 3 is provided with a valve through hole , the valve retaining ring 3 is also provided with a drain hole; the drain valve 4 is arranged in the second step section 12, and its rod-shaped end passes through the valve channel of the valve retaining ring 3 hole, and the other end is in the shape of an end cap; the end cap of the drain valve 4 is positioned by compressing and positioning the spring 5; the spring 5 is arranged in the third step section 13, and its diameter is the same as that The inner diameters of the three step sections 13 are the same.

In a possible embodiment, a sealing O-ring 6 is inlaid on the contact surface between the end cap-shaped end of the liquid discharge valve 4 and the housing 1 .

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

In a possible embodiment, the drain hole on the valve stop ring 3 is a centrally symmetrical semicircular waist-shaped hole.

In a possible embodiment, the housing 1 and the upper cover 2 are made of aluminum alloy.

In a possible embodiment, the valve stop ring 3, the liquid discharge valve 4, and the spring 5 are made of stainless steel.

In a possible embodiment, the sealing O-ring 6 is made of elastic rubber.

A method for automatic liquid drainage of a gas pipeline, using the above-mentioned automatic liquid drainage device for a gas pipeline, characterized in that it includes the following process:

The gas is introduced into the housing 1, and the gas is fed in along the tangent line of the inner cavity of the housing 1 from the air inlet 15, forming a swirl flow in the inner cavity of the housing 1, separating the liquid by centrifugal force, and at the same time, the gas pressure overcomes the The thrust generated by the spring 5 will push the liquid discharge valve 4 downward, and the liquid discharge valve 4 will be closed to ensure the airtightness during the ventilation process; stop the gas into the housing 1, and the spring 5 will push the liquid discharge valve 4 upward, The liquid is automatically drained.

Claims (8)

1. An automatic liquid drainage device for a gas pipeline is characterized by comprising a shell (1), an upper cover plate (2), a valve retainer ring (3), a liquid drainage valve (4) and a spring (5); the upper cover plate (2) is fixedly connected with the upper end of the shell (1) in a sealing way; the inner diameter of the inner cavity of the shell (1) is of a four-stage sequentially decreasing ladder structure from top to bottom, and the four-stage ladder structure is respectively marked as a first-stage ladder section (11), a second-stage ladder section (12), a third-stage ladder section (13) and a fourth-stage ladder section (14); an air inlet (15) and an air outlet (16) which are communicated with the outside are formed in the first-stage stepped section (11); the height position of the air outlet (16) is higher than that of the air inlet (15); the valve retainer ring (3) is arranged in the second-stage stepped section (12), the outer diameter of the valve retainer ring is the same as the inner diameter of the second-stage stepped section (12), a valve through hole is formed in the center of the valve retainer ring (3), and a liquid discharge hole is formed in the valve retainer ring (3); the liquid discharge valve (4) is arranged in the second-stage step section (12), one rod-shaped end of the liquid discharge valve penetrates through the valve through hole of the valve retainer ring (3), and the other end of the liquid discharge valve is in an end cover shape; one end of the liquid discharge valve (4) in an end cover shape is compressed and positioned through the spring (5); the spring (5) is arranged in the third-stage stepped section (13), and the diameter of the spring is the same as the inner diameter of the third-stage stepped section (13).

2. The automatic liquid drainage device for the gas pipeline according to claim 1, characterized in that a sealing O-ring (6) is embedded on the contact surface of one end of the liquid drainage valve (4) in an end cover shape and the shell (1).

3. An automatic drain device according to claim 1, characterized in that the difference in height between said inlet (15) and said outlet (16) is at least 20mm.

4. The automatic liquid discharge device for the gas pipeline as claimed in claim 1, wherein the liquid discharge hole on the valve retainer ring (3) is a centrosymmetric semicircular kidney-shaped hole.

5. The automatic liquid drainage device for the gas pipeline according to claim 1, wherein the shell (1) and the upper cover plate (2) are made of aluminum alloy.

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

7. The automatic drain device for gas pipelines according to claim 1, characterized in that the sealing O-ring (6) is made of elastic rubber.

8. An automatic liquid discharge method for a gas pipeline, which is applied to the automatic liquid discharge device for the gas pipeline as claimed in any one of claims 1 to 7, and is characterized by comprising the following steps of:

introducing gas into the shell (1), wherein the gas is introduced from the gas inlet (15) along the tangent line of the inner cavity of the shell (1), a rotational flow is formed in the inner cavity of the shell (1), liquid is separated through centrifugal force, meanwhile, the gas pressure overcomes the thrust generated by the spring (5) to downwardly push the liquid discharge valve (4), the liquid discharge valve (4) is closed, and the airtightness in the ventilation process is ensured; stopping introducing gas into the shell (1), pushing the liquid discharge valve (4) upwards by the spring (5), and automatically discharging the liquid.

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