Anti-icing LNG loading and unloading arm heating and tracing device

Abstract

This utility model discloses a heating and heat tracing device for an anti-icing LNG loading and unloading arm, including a frame, a fixed frame, a first conveying pipe, and a second conveying pipe. The fixed frame and the first conveying pipe are respectively fixedly connected to the side wall of the frame. The second conveying pipe is rotatably connected to the end of the first conveying pipe away from the frame. A connecting sleeve is fixedly sleeved at the connection between the second and first conveying pipes. A sleeve is fixedly sleeved on the wall of the first conveying pipe, and a box is fixedly connected to the top of the sleeve. A spiral heating tube is provided inside the sleeve. In this utility model, after the controller is started, the spiral heating tube, made of nickel-chromium alloy, heats up after being energized by the controller. The heat is conducted through the sleeve to the outer wall of the first conveying pipe, forming an annular heating band, maintaining the pipe wall temperature above the freezing point of LNG, and enabling stable operation of the LNG loading and unloading arm.

Description

Technical Field

[0001] This utility model relates to the field of LNG loading and unloading arm technology, specifically to a heating and heat tracing device for an anti-icing LNG loading and unloading arm. Background Technology

[0002] LNG loading and unloading arms are key equipment used in liquefied natural gas loading and unloading operations. They are mainly used to connect LNG transport tankers to storage tanks or other storage equipment to achieve safe and efficient LNG transportation. Anti-freezing LNG loading and unloading arms are specially designed and improved loading and unloading arms based on ordinary LNG loading and unloading arms to address the problem of freezing in low-temperature environments.

[0003] In existing technologies, during the operation of LNG loading / unloading arms, the continuous transport of liquefied natural gas can cause a decrease in the internal temperature of the loading / unloading arm due to the influence of liquefied natural gas. This may lead to icing on the exterior of the LNG loading / unloading arm, affecting its subsequent stable operation. Therefore, this application designs a heating and heat tracing device for anti-icing LNG loading / unloading arms. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a heating and heat tracing device for anti-icing LNG loading and unloading arms, so as to solve the problems mentioned in the background technology.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution.

[0006] This utility model provides a heating and heat tracing device for anti-icing LNG loading and unloading arms, including a frame, a fixed frame, a first conveying pipe, and a second conveying pipe. The fixed frame and the first conveying pipe are respectively fixedly connected to the side wall of the frame. The second conveying pipe is rotatably connected to the end of the first conveying pipe away from the frame. A connecting sleeve is fixedly sleeved at the connection between the second conveying pipe and the first conveying pipe. A sleeve is fixedly sleeved on the wall of the first conveying pipe. A box is fixedly connected to the top of the sleeve. A spiral heating tube is provided inside the sleeve. A controller is fixedly connected to the top of the box. The spiral heating tube is electrically connected to the controller. A temperature sensor is fixedly connected to the inner wall of the top of the box. The temperature sensor is electrically connected to the controller.

[0007] Preferably, a connecting frame is fixedly sleeved on the wall of the second conveying pipe, an electric push rod is fixedly connected to the top of the connecting frame, a connecting plate is fixedly connected to the wall of the connecting sleeve, and the piston rod end of the electric push rod is hinged to the side wall of the connecting plate.

[0008] Preferably, an output pipe is fixedly connected to the end of the second conveying pipe opposite to the first conveying pipe, and an output hose is fixedly connected to the bottom of the output pipe.

[0009] Preferably, a bimetallic strip is fixedly installed inside the box, a pressure sensor is fixedly connected to the inner wall of the top of the box, and an alarm is fixedly connected to the top of the box. The pressure sensor and the alarm are respectively electrically connected to the controller.

[0010] Preferably, a plurality of heat-conducting fins are fixedly connected to the inner wall of the bottom end of the box body, and the bottom of the bimetallic sheet is attached to the upper surface of the plurality of heat-conducting fins.

[0011] Preferably, a rectangular slot is provided at the connection between the sleeve and the box body.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The anti-icing LNG loading and unloading arm heating and heat tracing device, after being started by the controller, uses a spiral heating tube made of nickel-chromium alloy. After being energized by the controller, it generates heat and the heat is conducted through the sleeve to the outer wall of the first conveying pipe, forming an annular heating zone to maintain the pipe wall temperature and ensure that it is higher than the freezing point of LNG, so as to achieve stable use of the LNG loading and unloading arm.

[0014] 2. The anti-icing LNG loading and unloading arm heating and heat tracing device can increase the heat dissipation area through heat-conducting fins, ensuring the uniformity of temperature inside the box. It can also enable the temperature sensor to more accurately monitor the surface temperature of the delivery pipe in real time. When the temperature is too low, the controller increases the heating power, and when the temperature is too high, the power is reduced to maintain the temperature, realizing PID closed-loop control. When the temperature exceeds the dangerous range, the bimetallic strip deforms due to thermal expansion and contraction. The bent bimetallic strip lifts the pressure sensor, and the pressure signal is transmitted to the controller. The controller immediately cuts off the heating power and activates the alarm to issue an audible and visual warning.

[0015] 3. The anti-icing LNG loading and unloading arm heating and heat tracing device is fixed on the wall of the second conveying pipe via an electric push rod and a connecting frame. The extension and retraction of the piston rod can drive the connecting plate to swing, causing the connecting sleeve to rotate and the second conveying pipe to swing. This can adjust the conveying angle of the second conveying pipe, improving the flexibility of conveying. The output pipe and output hose are more convenient to connect to the input port of the loading and unloading vehicle. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the middle section.

[0019] In the diagram: 1. Frame, 2. Fixing frame, 3. First conveying pipe, 4. Second conveying pipe, 5. Connecting sleeve, 6. Connecting frame, 7. Electric push rod, 8. Connecting plate, 9. Output pipe, 10. Output hose, 11. Sleeve, 12. Box, 13. Spiral heating tube, 14. Controller, 15. Temperature sensor, 16. Bimetallic strip, 17. Pressure sensor, 18. Heat-conducting fins, 19. Alarm. Detailed Implementation

[0020] A heating and heat tracing device for the anti-icing LNG loading and unloading arm, such as Figure 1-3 The device includes a frame 1, a fixed frame 2, a first conveying pipe 3, and a second conveying pipe 4. The fixed frame 2 and the first conveying pipe 3 are fixedly connected to the side wall of the frame 1. The second conveying pipe 4 is rotatably connected to the end of the first conveying pipe 3 away from the frame 1. A connecting sleeve 5 is fixedly sleeved at the connection between the second conveying pipe 4 and the first conveying pipe 3. A sleeve 11 is fixedly sleeved on the wall of the first conveying pipe 3. A box body 12 is fixedly connected to the top of the sleeve 11. A spiral heating tube 13 is provided inside the sleeve 11. A controller 14 is fixedly connected to the top of the box body 12. The spiral heating tube 13 is electrically connected to the controller 14. A temperature sensor 15 is fixedly connected to the inner wall of the top of the box body 12. The temperature sensor 15 is electrically connected to the controller 14. A rectangular slot is provided at the connection between the sleeve 11 and the box body 12.

[0021] A bimetallic strip 16 is fixedly installed inside the box body 12. A pressure sensor 17 is fixedly connected to the inner wall of the top of the box body 12. An alarm 19 is fixedly connected to the top of the box body 12. The pressure sensor 17 and the alarm 19 are electrically connected to the controller 14 respectively. Multiple heat-conducting fins 18 are fixedly connected to the inner wall of the bottom of the box body 12. The bottom of the bimetallic strip 16 is attached to the upper surface of the multiple heat-conducting fins 18.

[0022] In summary: After being started by controller 14, the spiral heating tube 13, made of nickel-chromium alloy with a power density of 5-10 W / cm², heats up after being energized by controller 14. The heat is conducted through sleeve 11 to the outer wall of the first conveying pipe 3, forming an annular heating zone, maintaining the pipe wall temperature between -10℃ and 5℃, ensuring it is above the LNG freezing point of -162℃, thus enabling stable operation of the LNG loading and unloading arm.

[0023] The heat-conducting fins 18 can increase the heat dissipation area and ensure the uniformity of the internal temperature of the box 12. This allows the temperature sensor 15 to more accurately monitor the surface temperature of the delivery pipe in real time. When the temperature is below 0°C, the controller 14 increases the heating power to 100%. When the temperature exceeds 5°C, the power is reduced to 30%-50% to maintain the temperature and achieve PID closed-loop control. When the temperature exceeds the dangerous range, the bimetallic strip 16 deforms due to thermal expansion and contraction. The bent bimetallic strip lifts the pressure sensor 17, and the pressure signal is transmitted to the controller 14. The controller 14 immediately cuts off the heating power and activates the alarm 19 to issue an audible and visual warning.

[0024] To improve the flexibility of conveying, such as Figure 1-3 As shown, a connecting frame 6 is fixedly sleeved on the wall of the second conveying pipe 4, an electric push rod 7 is fixedly connected to the top of the connecting frame 6, a connecting plate 8 is fixedly connected to the wall of the connecting sleeve 5, the piston rod end of the electric push rod 7 is hinged to the side wall of the connecting plate 8, an output pipe 9 is fixedly connected to the end of the second conveying pipe 4 away from the first conveying pipe 3, and an output hose 10 is fixedly connected to the bottom of the output pipe 9.

[0025] The electric push rod 7 is fixed on the wall of the second conveying pipe 4 via the connecting frame 6. The piston rod can extend and retract to drive the connecting plate 8 to swing, causing the connecting sleeve 5 to rotate, which in turn drives the second conveying pipe 4 to swing. This allows for adjustment of the conveying angle of the second conveying pipe 4, improving the flexibility of conveying. The output pipe 9 and the output hose 10 are more convenient to connect to the input port of the loading and unloading vehicle.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heating and heat tracing device for an anti-icing LNG loading / unloading boom, comprising a frame (1), a fixing frame (2), a first conveying pipe (3), and a second conveying pipe (4), characterized in that: The fixed frame (2) and the first conveying pipe (3) are respectively fixedly connected to the side wall of the frame (1). The second conveying pipe (4) is rotatably connected to the end of the first conveying pipe (3) away from the frame (1). A connecting sleeve (5) is fixedly sleeved at the connection between the second conveying pipe (4) and the first conveying pipe (3). A sleeve (11) is fixedly sleeved on the wall of the first conveying pipe (3). A box body (12) is fixedly connected to the top of the sleeve (11). A spiral heating pipe (13) is provided inside the sleeve (11). A controller (14) is fixedly connected to the top of the box body (12). The spiral heating pipe (13) is electrically connected to the controller (14). A temperature sensor (15) is fixedly connected to the inner wall of the top of the box body (12). The temperature sensor (15) is electrically connected to the controller (14).

2. The anti-icing LNG loading / unloading boom heating and heat tracing device according to claim 1, characterized in that: A connecting frame (6) is fixedly sleeved on the wall of the second conveying pipe (4). An electric push rod (7) is fixedly connected to the top of the connecting frame (6). A connecting plate (8) is fixedly connected to the wall of the connecting sleeve (5). The piston rod end of the electric push rod (7) is hinged to the side wall of the connecting plate (8).

3. The anti-icing LNG loading / unloading boom heating and heat tracing device according to claim 1, characterized in that: The second delivery pipe (4) is fixedly connected to an output pipe (9) at one end away from the first delivery pipe (3), and an output hose (10) is fixedly connected to the bottom of the output pipe (9).

4. The anti-icing LNG loading / unloading boom heating and heat tracing device according to claim 1, characterized in that: The box (12) is fixedly provided with a bimetallic strip (16) inside. A pressure sensor (17) is fixedly connected to the inner wall of the top of the box (12). An alarm (19) is fixedly connected to the top of the box (12). The pressure sensor (17) and the alarm (19) are respectively electrically connected to the controller (14).

5. The anti-icing LNG loading / unloading boom heating and heat tracing device according to claim 4, characterized in that: The bottom inner wall of the box (12) is fixedly connected with a plurality of heat-conducting fins (18), and the bottom of the bimetallic sheet (16) is attached to the upper surface of the plurality of heat-conducting fins (18).

6. The anti-icing LNG loading / unloading boom heating and heat tracing device according to claim 1, characterized in that: A rectangular slot is provided at the connection between the sleeve (11) and the box body (12).

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