Liquefied gas loading arm

Abstract

The utility model relates to liquefied gas transportation technical field especially disclose a kind of liquefied gas loading and unloading arm, first loading and unloading arm is wound and is installed with the first cooling pipe for cooling, second loading and unloading arm is wound and has the second cooling pipe for cooling, first loading and unloading arm is fixedly installed with the first connecting disc for flow guide, second loading and unloading arm is fixedly installed with the second connecting disc for flow guide, first loading and unloading arm is fixedly installed with the first heat preservation pipe for heat preservation, first loading and unloading arm is fixedly installed with the second heat preservation pipe for heat preservation;Cooling liquid in first cooling pipe will be cooled to first loading and unloading arm, so that first loading and unloading arm keeps lower temperature, then again flow into second cooling pipe, thus second cooling pipe will be cooled to second loading and unloading arm, so that second loading and unloading arm keeps lower temperature, reached the effect of improving liquefied gas conveying stability and reducing leakage risk.

Description

Technical Field

[0001] This utility model relates to the field of liquefied gas transportation technology, and in particular to a liquefied gas loading and unloading arm. Background Technology

[0002] In the storage and transportation of liquefied petroleum gas (LPG), safe and efficient loading and unloading operations are crucial. As a key piece of equipment for LPG loading and unloading, the performance and reliability of LPG loading and unloading arms directly affect the efficiency and safety of the entire process. In practical applications, LPG loading and unloading arms typically require the following technologies:

[0003] 1. Sealing structure, such as high-quality sealing gaskets and advanced sealing structures, to ensure that liquefied gas does not leak during loading and unloading;

[0004] 2. Flow control structure, such as high-precision regulating valves and intelligent flow sensors, can accurately control the loading and unloading flow of liquefied gas;

[0005] 3. Steering structure, such as multi-jointed rotating components and adjustable support structure, ensures that the loading and unloading arm can adapt to loading and unloading needs at different positions and angles.

[0006] In liquefied petroleum gas (LPG) loading and unloading operations, loading arms are typically used as loading and unloading tools to transfer LPG from storage tanks to other containers.

[0007] However, during the implementation of the above technical solution, at least the following technical problems were found: When used in southern regions near the equator, the loading arm will be affected by the external environment and the temperature will rise, which will easily cause the liquefied gas flowing inside to vaporize, thereby increasing the internal pressure of the loading arm. This will not only lead to the appearance of gas-liquid two-phase flow in the loading arm, affecting the stability of the flow rate, but may also cause the loading arm to burst, increasing the risk of liquefied gas leakage. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a liquefied gas loading arm that solves the technical problem that when used in southern regions near the equator, the loading arm's temperature rises due to external environmental influences, easily causing the liquefied gas flowing inside to vaporize. This increases the internal pressure of the loading arm, leading not only to two-phase flow of gas and liquid within the loading arm, affecting flow stability, but also potentially causing the loading arm to burst, increasing the risk of liquefied gas leakage.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A liquefied gas loading and unloading arm includes a first loading and unloading arm, a second loading and unloading arm rotatably mounted on the first loading and unloading arm, a loading and unloading head rotatably mounted on the second loading and unloading arm, a first cooling pipe for cooling wound around the first loading and unloading arm, a second cooling pipe for cooling wound around the second loading and unloading arm, a first connecting plate for guiding flow fixedly mounted on the first loading and unloading arm, a second connecting plate for guiding flow fixedly mounted on the second loading and unloading arm, a first insulation pipe for heat preservation fixedly mounted on the first loading and unloading arm, and a second insulation pipe for heat preservation fixedly mounted on the first loading and unloading arm.

[0011] Preferably, the first cooling pipe is connected to the first connecting plate.

[0012] Preferably, the second cooling pipe is connected to the second connecting plate.

[0013] Preferably, the first connecting plate and the second connecting plate are rotatably connected by a labyrinth seal method.

[0014] Preferably, threaded bends are fixedly installed at the ends of both the first and second cooling pipes.

[0015] Preferably, the first and second insulation pipes are made of polyurethane foam.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. During use, the cooling equipment will deliver coolant into the first cooling pipe through a threaded bend. The first cooling pipe is wrapped around the outside of the first loading and unloading arm. The coolant in the first cooling pipe will cool the first loading and unloading arm, keeping it at a low temperature. Then, the coolant will flow along the first cooling pipe into the space between the first connecting plate and the second connecting plate, and then flow into the second cooling pipe. Since the second cooling pipe is wrapped around the outer wall of the second loading and unloading arm, it will cool the second loading and unloading arm, keeping it at a low temperature. This achieves the effect of improving the stability of liquefied gas transportation and reducing the risk of leakage.

[0018] Second, during this process, the first and second insulation pipes will block the external temperature, preventing it from affecting the coolant in the first and second cooling pipes. When the second loading and unloading arm rotates, the second connecting plate can rotate with it, and it will also rotate relative to the first connecting plate. Since the second and first connecting plates are sealed by a sealing method, the area where they are connected forms a Z-shaped channel. When the coolant passes through this tortuous channel, it needs to undergo multiple throttling and expansion, generating resistance and reducing leakage. In addition, the gap of the labyrinth seal is usually very small, increasing the path length and difficulty of media leakage, thus effectively controlling leakage and completing the sealing of the coolant. This prevents the first and second cooling pipes from being affected by the environment through the pipe connection, thereby improving the cooling effect. Attached Figure Description

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0020] Figure 1 This is an overall structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional view of the connecting disc of this utility model;

[0023] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0024] Figure 5 This is a structural diagram of the cooling pipe of this utility model.

[0025] Legend: 1. First loading / unloading arm; 2. Second loading / unloading arm; 3. Loading / unloading head; 4. First cooling pipe; 5. Second cooling pipe; 6. First connecting plate; 7. Second connecting plate; 8. First insulation pipe; 9. Second insulation pipe; 11. Threaded bend. Detailed Implementation

[0026] This application provides a liquefied gas loading arm that effectively solves the technical problem that, when used in southern regions near the equator, the loading arm's temperature rises due to external environmental influences, easily causing the liquefied gas flowing inside to vaporize. This increases the internal pressure of the loading arm, leading not only to two-phase flow and affecting flow stability, but also potentially causing the loading arm to burst and increasing the risk of liquefied gas leakage. In operation, a cooling device delivers coolant to a first cooling pipe via a threaded bend. The first cooling pipe is wrapped around the outside of the first loading arm, and the coolant in it cools the first loading arm, keeping it at a low temperature. The coolant then flows along the first cooling pipe into the space between the first and second connecting plates, and then into a second cooling pipe. Because the second cooling pipe is wrapped around the outer wall of the second loading arm, it cools the second loading arm, keeping it at a low temperature. Maintaining a lower temperature improves the stability of liquefied gas transportation and reduces the risk of leakage. During this process, the first and second insulation pipes block the external temperature, preventing it from affecting the coolant in the first and second cooling pipes. When the second loading arm rotates, the second connecting plate rotates with it, and also rotates relative to the first connecting plate. Since the second and first connecting plates are sealed by a sealing method, the area where they connect forms a Z-shaped channel. When the coolant passes through this tortuous channel, it needs to undergo multiple throttling and expansion processes, generating resistance and reducing leakage. In addition, the gaps in the labyrinth seal are usually very small, increasing the path length and difficulty of media leakage, thus effectively controlling leakage and sealing the coolant. This prevents the first and second cooling pipes from being affected by the environment through the pipe connection, thereby improving the cooling effect.

[0027] Example

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the technical solution in this application embodiment effectively solves the technical problem that when used in southern regions near the equator, the temperature of the loading arm is affected by the external environment, which easily causes the liquefied gas flowing inside to vaporize, thereby increasing the internal pressure of the loading arm. This not only leads to two-phase flow of gas and liquid in the loading arm, affecting the stability of the flow rate, but may also cause the loading arm to burst, increasing the risk of liquefied gas leakage. The overall idea is as follows:

[0029] To address the problems existing in the prior art, this utility model provides a liquefied gas loading and unloading arm, including a first loading and unloading arm 1, a second loading and unloading arm 2 rotatably mounted on the first loading and unloading arm 1, a loading and unloading head 3 rotatably mounted on the second loading and unloading arm 2, a first cooling pipe 4 for cooling is wound around the first loading and unloading arm 1, and a second cooling pipe 5 for cooling is wound around the second loading and unloading arm 2.

[0030] A first connecting plate 6 for guiding flow is fixedly installed on the first loading and unloading arm 1, a second connecting plate 7 for guiding flow is fixedly installed on the second loading and unloading arm 2, a first insulation pipe 8 for heat preservation is fixedly installed on the first loading and unloading arm 1, and a second insulation pipe 9 for heat preservation is fixedly installed on the first loading and unloading arm 1.

[0031] The first cooling pipe 4 is connected to the first connecting plate 6, and the second cooling pipe 5 is connected to the second connecting plate 7. The first connecting plate 6 and the second connecting plate 7 are rotatably connected by a labyrinth seal method. The ends of the first cooling pipe 4 and the second cooling pipe 5 are both fixedly installed with threaded bends 11. The first insulation pipe 8 and the second insulation pipe 9 are made of polyurethane foam.

[0032] First loading arm 1 and second loading arm 2: As the main structures for loading and unloading liquefied gas, they carry and transfer liquefied gas;

[0033] Loading / unloading head 3: Used to connect to liquefied gas storage or transportation equipment to realize loading and unloading operations;

[0034] First cooling pipe 4 and second cooling pipe 5: Through the flow of coolant, they cool the first loading and unloading arm 1 and the second loading and unloading arm 2 respectively, maintain a low temperature, improve the stability of liquefied gas transportation and reduce the risk of leakage.

[0035] First connecting plate 6 and second connecting plate 7: On the one hand, they serve to guide the coolant, allowing the coolant to flow from the first cooling pipe 4 to the second cooling pipe 5; on the other hand, they are connected by a labyrinth seal method to effectively control coolant leakage.

[0036] First insulation pipe 8 and second insulation pipe 9: They block external temperature to prevent it from affecting the coolant in the first cooling pipe 4 and second cooling pipe 5, thus ensuring the cooling effect.

[0037] Threaded bend 11: Facilitates connection to the outlet and inlet pipes of cooling equipment, ensuring smooth delivery of coolant.

[0038] Working principle:

[0039] The first step involves connecting the outlet and inlet pipes of the cooling equipment to the first cooling pipe 4 and the second cooling pipe 5 via threaded bends 11. The threaded bend 11 at the end of the first cooling pipe 4 is connected to the outlet pipe, and the threaded bend 11 at the end of the second cooling pipe 5 is connected to the inlet pipe. During use, the cooling equipment will deliver coolant into the first cooling pipe 4 through the threaded bends 11. The first cooling pipe 4 is wrapped around the outside of the first loading and unloading arm 1. The coolant in the first cooling pipe 4 will cool the first loading and unloading arm 1, keeping it at a low temperature. Then, the coolant will flow along the first cooling pipe 4 into the space between the first connecting plate 6 and the second connecting plate 7, and then into the second cooling pipe 5. Since the second cooling pipe 5 is wrapped around the outer wall of the second loading and unloading arm 2, it will cool the second loading and unloading arm 2, keeping it at a low temperature.

[0040] In the second step, during this process, the first insulation pipe 8 and the second insulation pipe 9 will block the external temperature, preventing the external temperature from affecting the coolant in the first cooling pipe 4 and the second cooling pipe 5. When the second loading and unloading arm 2 rotates, the second connecting plate 7 can rotate with the second loading and unloading arm 2. At this time, the second connecting plate 7 will also rotate relative to the first connecting plate 6. Since the second connecting plate 7 and the first connecting plate 6 are sealed by a sealing method, the area where the second connecting plate 7 and the first connecting plate 6 are connected forms a Z-shaped channel. When the coolant passes through this tortuous channel, it needs to undergo multiple throttling and expansion, generating resistance, thereby reducing the leakage. In addition, the gap of the labyrinth seal is usually very small, which increases the path length and difficulty of medium leakage, thereby effectively controlling the leakage and completing the sealing of the coolant.

[0041] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A liquefied gas loading and unloading arm, comprising a first loading and unloading arm (1), a second loading and unloading arm (2) rotatably mounted on the first loading and unloading arm (1), and a loading and unloading head (3) rotatably mounted on the second loading and unloading arm (2), characterized in that, The first loading and unloading arm (1) is wound with a first cooling pipe (4) for cooling, the second loading and unloading arm (2) is wound with a second cooling pipe (5) for cooling, the first loading and unloading arm (1) is fixedly installed with a first connecting plate (6) for guiding flow, the second loading and unloading arm (2) is fixedly installed with a second connecting plate (7) for guiding flow, the first loading and unloading arm (1) is fixedly installed with a first heat preservation pipe (8) for heat preservation, and the first loading and unloading arm (1) is fixedly installed with a second heat preservation pipe (9) for heat preservation.

2. The liquefied gas loading and unloading arm as described in claim 1, characterized in that, The first cooling pipe (4) is connected to the first connecting plate (6).

3. The liquefied gas loading and unloading arm as described in claim 1, characterized in that, The second cooling pipe (5) is connected to the second connecting plate (7).

4. A liquefied gas loading and unloading arm as described in claim 1, characterized in that, The first connecting plate (6) and the second connecting plate (7) are rotatably connected by a labyrinth seal method.

5. A liquefied gas loading and unloading arm as described in claim 1, characterized in that, The ends of the first cooling pipe (4) and the second cooling pipe (5) are both fixedly installed with threaded bends (11).

6. A liquefied gas loading and unloading arm as described in claim 1, characterized in that, The first insulation pipe (8) and the second insulation pipe (9) are made of polyurethane foam.

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