Flow self-adjusting composite liner device for gas pipeline

Abstract

The invention discloses a flow self-adjusting composite gasket device for a gas pipeline, which comprises a gas supply joint, a composite gasket and a gas outlet joint, the gas supply joint is of a tubular structure, a first gas path is arranged in the gas supply joint, an external thread is arranged at a gas outlet end, gas flows in from the left side through the first gas path and flows out from the right side through the first gas path, and the composite gasket is of an annular sandwich structure. Rigid layers are arranged on the two sides, a flexible layer is arranged in the middle, a round hole is formed in the middle, the gas outlet connector is of a tubular structure, a cavity and a second gas path are arranged in the gas outlet connector, the cavity is communicated with the second gas path, an internal thread is arranged at the gas inlet end, and gas flows in from the left side and flows out from the right side through the cavity and the second gas path; and the composite gasket is arranged in the cavity of the air outlet joint. The flow self-adjusting composite liner device can spontaneously limit the increase of the gas flow, has very high applicability and wide universality, is very easy to integrate in the current production line for manufacturing large ships and marine equipment, and is very low in cost and very high in benefit.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding and marine engineering equipment manufacturing technology, and in particular to a flow self-regulating composite liner device for gas pipelines. Background Technology

[0002] Currently, welding is undoubtedly one of the core processes in shipbuilding and marine engineering equipment manufacturing. It is the main process for hull component processing, module assembly, and final overall assembly, and its quality directly affects the structural safety and service performance of ships and marine equipment. Carbon dioxide shielded welding accounts for over 90% of welding in ships and marine equipment. To ensure welding quality, the amount of carbon dioxide used is as high as 4.5 times the weight of the welding wire. However, under ideal gas conditions, this ratio of 1.8-2.5 is sufficient to guarantee weld quality. Conventional carbon dioxide gas delivery systems increase pressure to maintain terminal pressure, leading to excessive pressure at the front and middle of the system. When the welding machine is connected to these locations, it inevitably increases the gas flow rate, resulting in a large amount of unnecessary carbon dioxide loss. Traditional solutions mainly involve adding a gas path control system or modifying small gas shielded welding systems, but these are costly, difficult to maintain, and complex on-site operations, making them unsuitable for large shipyards. Therefore, how to reduce gas consumption while ensuring a high welding qualification rate, controlling costs, and achieving strong applicability and wide versatility is a major problem that the shipbuilding and marine equipment manufacturing industry urgently needs to solve. Summary of the Invention

[0003] The purpose of this invention is to provide a flow self-regulating composite gasket device for gas pipelines that is highly applicable, versatile, and low in cost.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: a flow self-regulating composite gasket device for gas transmission pipelines, comprising a gas supply connector (1), a composite gasket (2), and a gas outlet connector (3). The gas supply connector (1) is a tubular structure with a first gas passage (1a) inside. The gas outlet end is provided with an external thread (1b). Gas flows in from the left side and flows out from the right side through the first gas passage (1a). The composite gasket (2) is an annular sandwich structure with rigid layers on both sides and a flexible layer in the middle. The gas outlet connector (3) has a circular hole (2a) in the middle. It is a tubular structure with a chamber (3a) and a second gas passage (3b) inside. The chamber (3a) is connected to the second gas passage (3b). The gas inlet end is provided with an internal thread (3d). The gas flows in from the left side through the chamber (3a) and the second gas passage (3b) and flows out from the right side. The gas supply connector (1) is screwed into the chamber (3a) of the gas outlet connector (3). The composite gasket (2) is placed in the chamber (3a) of the gas outlet connector (3).

[0005] The outer diameter of the cross-section of the chamber (3a) is greater than the outer diameter of the cross-section of the second air passage (3b). The outer diameter of the cross-section of the first air passage (1a) is between the outer diameter of the cross-section of the chamber (3a) and the outer diameter of the cross-section of the second air passage (3b). The outer diameter of the cross-section of the composite liner (2) is the same as the outer diameter of the cross-section of the chamber (3a). The outer diameter of the cross-section of the circular hole (2a) is smaller than the outer diameter of the cross-section of the second air passage (3b).

[0006] In use, the composite gasket (2) is placed in the chamber (3a) of the gas outlet connector (3). The rigid layer of the composite gasket (2) contacts the second annular contact surface (3c) between the chamber (3a) and the second gas path (3b). Then, the gas supply connector (1) is screwed into the chamber (3a) of the gas outlet connector (3). The first annular contact surface (1c) at the gas outlet end of the gas supply connector (1) presses down on the rigid layer on the other side of the composite gasket (2). In the initial state, that is, under the minimum gas supply pressure that meets the welding quality, the composite gasket (2) can withstand the pressure and will not be compressed. The gas flow rate allowed through the round hole (2a) is just right. When the gas pressure flowing into the first gas path (1a) increases, the gas squeezes the composite gasket (2). The middle flexible layer of the composite gasket (2) is squeezed and expanded to bulge towards the center, which makes the cross-sectional area of ​​the round hole (2a) of the composite gasket (2) smaller, thereby limiting the gas flow rate.

[0007] The gas flow rate can also be adjusted by adjusting the hardness and thickness of the rigid and flexible layers of the composite liner (2) and the diameter of the outer contour of the circular hole (2a).

[0008] This invention discloses a flow self-regulating composite gasket device for gas pipelines, which can spontaneously limit the increase of gas flow, avoid excessive gas consumption, save costs, and has very strong applicability and wide versatility. It is extremely easy to integrate into the production lines of current large ships and marine equipment manufacturing, with extremely low cost and extremely high efficiency. Attached Figure Description

[0009] Figure 1 This is an exploded view of a flow self-regulating composite liner device for gas pipelines according to the present invention.

[0010] Figure 2 This is a schematic diagram of a flow self-regulating composite liner device for gas pipelines according to the present invention.

[0011] Figure 3 This is a front view of the composite liner of a flow self-regulating composite liner device for gas pipelines according to the present invention.

[0012] Figure 4 This is a side view of the composite liner of a flow self-regulating composite liner device for gas pipelines according to the present invention.

[0013] In the diagram: 1. Air supply connector; 2. Composite gasket; 3. Air outlet connector; 1a. First air passage; 1b. External thread; 1c. First annular contact surface; 2a. Circular hole; 3a. Chamber; 3b. Second air passage; 3c. Second annular contact surface; 3d. Internal thread. Detailed Implementation

[0014] like Figures 1 to 4 As shown, a flow-regulating composite gasket device for gas pipelines includes a gas supply connector 1, a composite gasket 2, and a gas outlet connector 3. The gas supply connector 1 is a tubular structure with a first gas passage 1a inside. The gas outlet end has an external thread 1b. Gas flows in from the left side and out from the right side through the first gas passage 1a. The gas outlet end of the gas supply connector 1 has a first annular contact surface 1c. The outer diameter of the cross-section of the first gas passage 1a is between the outer diameter of the cross-section of the chamber 3a and the outer diameter of the cross-section of the second gas passage 3b. The composite gasket 2 is an annular sandwich structure with rigid layers on both sides and a flexible layer in the middle, with a circular hole 2a in the middle. The cross-section of the composite gasket 2... The outer contour diameter is the same as the cross-sectional outer contour diameter of the chamber 3a. The cross-sectional outer contour diameter of the circular hole 2a is smaller than the cross-sectional outer contour diameter of the second air passage 3b. The air outlet connector 3 is a tubular structure containing the chamber 3a and the second air passage 3b. The chamber 3a is connected to the second air passage 3b. The cross-sectional outer contour diameter of the chamber 3a is larger than the cross-sectional outer contour diameter of the second air passage 3b, forming a second annular contact surface 3c. The gas inlet end is provided with an internal thread 3d. Gas flows in from the left side through the chamber 3a and the second air passage 3b and flows out from the right side. The gas supply connector 1 is screwed into the chamber 3a of the air outlet connector 3. The composite gasket 2 is placed in the chamber 3a of the air outlet connector 3.

[0015] In use, the composite gasket 2 is placed in the chamber 3a of the air outlet connector 3. The rigid layer of the composite gasket 2 contacts the second annular contact surface 3c between the chamber 3a and the second air passage 3b. Then, the air supply connector 1 is screwed into the chamber 3a through the external thread 1b and the internal thread 3d of the air outlet connector 3. The first annular contact surface 1c at the gas outlet end of the air supply connector 1 presses down on the rigid layer on the other side of the composite gasket 2. In the initial state, that is, under the minimum air supply pressure that meets the welding quality, the composite gasket 2 can withstand the pressure and will not be compressed. The gas flow rate allowed through the circular hole 2a is just right. When the gas flows into the second air passage 3b... When the gas pressure in gas path 1a increases, the gas will compress the rigid layer of composite gasket 2. Since both sides of composite gasket 2 are rigid layers and will not deform, the flexible layer in the middle of composite gasket 2 is compressed and expands towards the center, making the cross-sectional area of ​​the circular hole 2a of composite gasket 2 smaller. This limits the increase in gas flow due to the increase in gas pressure and avoids unnecessary gas waste. Furthermore, the hardness and thickness of the rigid and flexible layers of composite gasket 2, as well as the outer diameter of the circular hole 2a, can be adjusted to meet various self-regulating requirements for gas flow.

Claims

1. A flow-regulating composite gasket device for gas transmission pipelines, characterized in that: The device includes an air supply connector (1), a composite gasket (2), and an air outlet connector (3). The air supply connector (1) is a tubular structure with a first air passage (1a) inside. The gas outlet end is provided with an external thread (1b). Gas flows in from the left side and out from the right side through the first air passage (1a). The composite gasket (2) is an annular sandwich structure with rigid layers on both sides and a flexible layer in the middle. A round hole (2a) is opened in the middle. The air outlet connector (3) is a tubular structure with a chamber (3a) and a second air passage (3b) inside. The chamber (3a) is connected to the second air passage (3b). The gas inlet end is provided with an internal thread (3d). Gas flows in from the left side and out from the right side through the chamber (3a) and the second air passage (3b). The air supply connector (1) is screwed into the chamber (3a) of the air outlet connector (3). The composite gasket (2) is placed in the chamber (3a) of the air outlet connector (3).

2. The flow self-regulating composite gasket device for gas transmission pipelines according to claim 1, characterized in that: The outer diameter of the cross-section of the chamber (3a) is greater than the outer diameter of the cross-section of the second air passage (3b). The outer diameter of the cross-section of the first air passage (1a) is between the outer diameter of the cross-section of the chamber (3a) and the outer diameter of the cross-section of the second air passage (3b). The outer diameter of the cross-section of the composite liner (2) is the same as the outer diameter of the cross-section of the chamber (3a). The outer diameter of the cross-section of the circular hole (2a) is smaller than the outer diameter of the cross-section of the second air passage (3b).

3. The flow self-regulating composite gasket device for gas transmission pipelines according to claim 1, characterized in that: In use, the composite gasket (2) is placed in the chamber (3a) of the gas outlet connector (3). The rigid layer of the composite gasket (2) contacts the second annular contact surface (3c) between the chamber (3a) and the second gas path (3b). Then, the gas supply connector (1) is screwed into the chamber (3a) of the gas outlet connector (3). The first annular contact surface (1c) at the gas outlet end of the gas supply connector (1) presses down on the rigid layer on the other side of the composite gasket (2). In the initial state, that is, under the minimum gas supply pressure that meets the welding quality, the composite gasket (2) can withstand the pressure and will not be compressed. The gas flow rate allowed through the round hole (2a) is just right. When the gas pressure flowing into the first gas path (1a) increases, the gas squeezes the composite gasket (2). The middle flexible layer of the composite gasket (2) is squeezed and expanded to bulge towards the center, which makes the cross-sectional area of ​​the round hole (2a) of the composite gasket (2) smaller, thereby limiting the gas flow rate.

4. A flow self-regulating composite gasket device for gas transmission pipelines according to claim 3, characterized in that: The gas flow rate can also be adjusted by adjusting the hardness and thickness of the rigid and flexible layers of the composite liner (2) and the diameter of the outer contour of the circular hole (2a).

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