Skid-mounted ethanol loading and unloading arm

Abstract

The invention relates to the technical field of fluid loading and unloading, and discloses a skid-mounted ethanol loading and unloading crane pipe. The collecting ring is fixed to the outer wall of the connector, the collecting ring and the connector are coaxially arranged, and a leakage-proof structure is arranged at the end, away from the first hose, of the collecting ring; and a collection box. When the connector is in butt joint with the tank car connector, the leakage-proof structure is in butt joint with the outer wall of the tank car and gradually abuts against the outer wall of the tank car, after abutting, the connector and the tank car connector are assembled and connected, the leakage-proof structure drives the suction pump to start at the moment, and if ethyl alcohol leaks from the connector, leaked ethyl alcohol flows to the collecting ring and is sucked into the circulation cavity; the leaked ethanol enters the collecting box through the flow guide pipe, timely collection of the leaked ethanol is completed, safety accidents caused by leakage of the ethanol from the joint are avoided, the leaked ethanol can be collected and reused, waste of the ethanol is avoided, connection between the joint and the tank car joint can be reinforced through suction force, and the possibility of ethanol leakage is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid handling, specifically to a pry-mounted ethanol loading and unloading crane pipe. BACKGROUND

[0002] The pry-mounted ethanol loading and unloading crane pipe is a device specially designed for ethanol loading and unloading operations. The device is assembled on a standard frame or chassis, facilitating overall movement and installation, and is commonly used in the fields of chemical industry, fuel storage and transportation, etc. The main feature of this loading and unloading crane pipe is that it can be quickly connected and disconnected, improving the loading and unloading efficiency, and at the same time, it has a safety valve and an emergency shut-off device to ensure that no accidents occur during operation.

[0003] The pry-mounted ethanol loading and unloading crane pipe is installed with valves including ball valves, emergency shut-off valves, etc. for controlling the inflow and outflow of ethanol, ensuring the controllability and safety of the loading and unloading process. It is also installed with real-time monitoring of ethanol flow and data transmission to the control system for precise control of loading and unloading volume, ensuring the accuracy and stability of loading and unloading. The quick connector can be quickly connected and disconnected with the tank truck interface, improving the loading and unloading efficiency.

[0004] There are some existing technologies that can provide pry-mounted ethanol loading and unloading crane pipes, such as patent publication CN111498786A. The main technical means is to drive the inner arm to rotate around the axis of the inner arm rotary joint through a rotary drive mechanism, thereby realizing the rotation of the inner arm relative to the feed pipe. The upper end of the feed pipe, the lower end of the inner arm, and the inner arm rotary joint are all located inside the stand, so that the rotation axis of the inner arm is located inside the stand, avoiding the restriction of the stand on the rotation of the inner arm, and increasing the angle of rotation of the inner arm relative to the feed pipe. After analysis, the drawbacks of this technical solution are that the joint connected with the tank truck interface does not have a leakage prevention structure. If the connection is not firm or if the joint is rotated and connected with the tank truck interface, it will cause ethanol to leak at the joint. The leaked ethanol cannot be quickly collected, and ethanol is a volatile flammable liquid. Its vapor has an explosion risk. If the leaked ethanol is not collected in time, it will easily cause safety accidents and also cause waste of ethanol. Based on this, the present application provides a pry-mounted ethanol loading and unloading crane pipe that can automatically collect ethanol leaked at the joint. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a pry-mounted ethanol loading and unloading crane pipe to solve the technical problem that leaked ethanol cannot be collected due to the lack of a leakage prevention structure at the joint.

[0006] The object of the present application can be achieved by the following technical solution: A pry-mounted ethanol loading and unloading crane pipe, comprising: The column is fixedly installed on the skid frame, and an outer arm is fixed on it. The outer arm is connected to the conveying pipe through the feed flange. The outer arm is connected to the first inner arm through the bend pipe. The first inner arm is connected to the second inner arm through the bend pipe. An air cylinder is connected to the second inner arm, and an air inflation valve is provided at the connection between the two. The second inner arm is connected to one end of the first hose through the connecting pipe, and the other end of the first hose is provided with a connector. The connector is connected to the tank truck interface. A collection ring is fixed to the outer wall of the connector, and the two are coaxially arranged. The end of the collection ring furthest from the first hose has a leak-proof structure that abuts against the outer wall of the tank truck. The end of the collection ring near the first hose is connected to one end of a second hose, and the other end of the second hose is connected to a top plate. The second hose is sleeved over the first hose, and a flow cavity exists between them. The top plate is fixed to the connecting pipe, and a sealing element is provided at the connection point. The collection box is fixed to the outer wall of the connecting pipe and is connected to the flow chamber through the guide pipe. The collection box is equipped with a suction pump, which is connected to the anti-leakage structure. When the anti-leakage structure is pressed against the outer wall of the tank truck, the anti-leakage structure drives the suction pump to start, so as to draw the ethanol leaking from the joint to the collection ring into the flow chamber, and then into the collection box through the guide pipe.

[0007] As a further embodiment of the present invention: the collecting ring includes an inner ring and an outer ring, and the inner ring is located between the connector and the outer ring. The end of the inner ring near the first hose is fixedly connected to the outer wall of the connector, and the end of the inner ring away from the first hose is connected to the leak-proof structure. The end of the outer ring near the first hose is connected to the second hose, and the end of the outer ring away from the first hose is connected to the leak-proof structure.

[0008] As a further aspect of the present invention: the leak-proof structure includes: An inner plate, the end of which near the first flexible tube is connected to an inner ring, a filter ring is provided at the connection between the inner plate and the inner ring, and the filter ring is coaxially arranged with the connector; there are multiple inner plates, and the multiple inner plates are arranged circumferentially, with adjacent inner plates connected by a flexible plate; and An outer plate is fitted over the outside of each inner plate, and each inner plate is slidably connected to each outer plate. Adjacent outer plates are connected by a flexible plate, and the outer plates are connected to an outer ring by a spring.

[0009] As a further aspect of the present invention: the outer plate is provided with a slot, and the inner plate is provided with a plurality of slots, and the slots and slots engage with the slots.

[0010] As a further aspect of the present invention: a push block is fixedly connected to the outer plate, a limit switch is provided on the outer ring, and an elastic element is provided at the connection between the two. The position of the limit switch interferes with the movement of the push block, and the limit switch is connected to the suction pump.

[0011] As a further aspect of the present invention: a heating element is provided on the inner wall of the inner ring, and the heating element is connected to a limit switch.

[0012] As a further aspect of the present invention: the connecting pipe is provided with a transmission component connected to the filter ring. When gas flows in the connecting pipe, the airflow triggers the transmission component, and the transmission component drives the filter ring to rotate.

[0013] As a further aspect of the present invention: the transmission assembly includes: A rotating ring is fixedly installed on the outside of the filter ring, and the two are coaxially arranged. The rotating ring is connected to the transmission ring through a connecting rod. The transmission ring is fixedly installed on the outside of the inner ring, and the two are coaxially arranged. A gear ring, rotatably mounted on the inner wall of the top plate, is coaxially arranged with the first flexible hose. The gear ring is connected to a transmission ring via several circumferentially arranged elastic connecting rods. A gear is rotatably mounted on the inner wall of the top plate, and the gear meshes with the gear ring. The housing is fixedly connected to the connecting pipe, and an impeller is rotatably installed inside it. The impeller is connected to a gear via a rotating shaft, and the three are arranged coaxially. The rotating shaft passes through the connecting pipe, and a seal is provided at the connection between the two.

[0014] The beneficial effects of this invention are: (1) In this invention, when the connector is connected to the tank truck connector, the anti-leakage structure abuts against the outer wall of the tank truck and gradually tightens. After tightening, the connector and the tank truck connector are assembled and connected. At this time, the anti-leakage structure drives the suction pump to start. Then, during the process of ethanol flowing into the tank truck connector through the connector, if ethanol leakage occurs at the connector, the leaked ethanol will flow to the collection ring and be sucked into the flow chamber, and then enter the collection box through the guide pipe to complete the timely collection of the leaked ethanol, avoid ethanol leakage from the connector and cause safety accidents, and can also collect and reuse the leaked ethanol to avoid ethanol waste. The suction force can also strengthen the connection between the connector and the tank truck connector and reduce the possibility of ethanol leakage. (2) In this invention, when the outer plate is abutted and moves toward the direction of the first hose, the push block triggers the limit switch. The limit switch sends a signal to the external controller, and the external controller controls the heating element to start, which can heat the leaked ethanol flowing to the inner ring, thus avoiding the problem that the ethanol will solidify and be difficult to flow back after leakage due to the low ambient temperature. (3) In this invention, during the process of ethanol transportation when the connector is connected to the tank truck connector, the contact position between the leaking ethanol and the filter ring is changed in real time under the condition that the flow direction at the leak point is constant, thereby avoiding the problem of the filter ring being blocked and affecting the ethanol reflux. It can also improve the filtration effect of ethanol. The continuously rotating filter ring can also guide the ethanol to expand the flow area of ​​ethanol and accelerate the reflux rate. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the first flexible tube in this invention; Figure 3 This is a schematic diagram of the connector structure in this invention; Figure 4 This is a schematic diagram of the structure of the second flexible tube in this invention; Figure 5 This is a schematic diagram of the collecting ring structure in this invention; Figure 6 In this invention Figure 4 A magnified schematic diagram of the structure at point A; Figure 7 This is a schematic diagram of the leak-proof structure in this invention; Figure 8 This is a schematic diagram of the transmission component in this invention; Figure 9 This is a schematic diagram of the impeller structure in this invention.

[0017] In the diagram: 1. Column; 2. Outer arm; 3. First inner arm; 4. Feed flange; 5. Second inner arm; 6. Connecting pipe; 7. Air cylinder; 8. Inflation valve; 9. First hose; 10. Connector; 11. Collection ring; 1101. Inner ring; 1102. Outer ring; 12. Leak-proof structure; 1201. Inner plate; 1202. Outer plate; 1203. Spring; 1204. Slot; 1205. Block; 1206. Flexible plate; 1207. Limit switch; 1208. Push block; 13. Second hose; 14. Top plate; 15. Guide pipe; 16. Collection box; 17. Filter ring; 18. Transmission assembly; 1801. Rotating ring; 1802. Connecting rod; 1803. Transmission ring; 1804. Elastic connecting rod; 1805. Gear ring; 1806. Gear; 1807. Rotating shaft; 1808. Housing; 1809. Impeller; 19. Heating element. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-5 As shown, the present invention is a skid-mounted ethanol loading arm, comprising: The column 1 is fixedly installed on the skid frame, and an outer arm 2 is fixed on it. The outer arm 2 is connected to the conveying pipe through the feed flange 4. The outer arm 2 is connected to the first inner arm 3 through the bend pipe. The first inner arm 3 is connected to the second inner arm 5 through the bend pipe. An air cylinder 7 is connected to the second inner arm 5, and an air inflation valve 8 is provided at the connection between the two. The second inner arm 5 is connected to one end of the first hose 9 through the connecting pipe 6, and the other end of the first hose 9 is provided with a connector 10. The connector 10 is connected to the tank truck interface. A collection ring 11 is fixed to the outer wall of the connector 10, and the two are coaxially arranged. The end of the collection ring 11 furthest from the first hose 9 is provided with a leak-proof structure 12, which abuts against the outer wall of the tank truck. The end of the collection ring 11 near the first hose 9 is connected to one end of a second hose 13, and the other end of the second hose 13 is connected to a top plate 14. The second hose 13 is sleeved outside the first hose 9, and a flow cavity exists between them. The top plate 14 is fixed to the connecting pipe 6, and a sealing element is provided at the connection point. The collection box 16 is fixed to the outer wall of the connecting pipe 6 and is connected to the flow chamber through the guide pipe 15. The collection box 16 is equipped with a suction pump, which is connected to the anti-leakage structure 12. When the anti-leakage structure 12 is pressed against the outer wall of the tank truck, the anti-leakage structure 12 drives the suction pump to start, so as to draw the ethanol leaking from the joint 10 to the collection ring 11 into the flow chamber, and then into the collection box 16 through the guide pipe 15.

[0020] In one embodiment, the air filling valve 8, the suction pump, and other electrical components are all connected to an external controller. The air cylinder 7, air filling valve 8, suction pump, and external controller are all existing technologies, and this application does not improve them. Therefore, it is not necessary to disclose their specific mechanical and circuit structures, and this does not affect the integrity of this application. The sealing element can be sealing cotton or rubber ring, as long as it can achieve a seal. This embodiment does not impose any specific limitations.

[0021] In practical application, the conveying pipe is connected to the loading arm, the inlet flange 4 is tightened for fixation, and the first hose 9 is bent and the connector 10 is connected to the tank truck connector. This allows for the transport of ethanol. When the loading arm is filled with air, the gas in the air cylinder 7 enters the second inner arm 5, thereby agitating the fluid in the second inner arm 5 and accelerating its flow speed. When the connector 10 is connected to the tank truck connector, the leak-proof structure 12 abuts against the outer wall of the tank truck and gradually tightens. After tightening, the connector 10 and the tank truck connector are assembled and connected. At this time, the leak-proof structure 12 drives the suction pump to start. Subsequently, during the process of ethanol flowing into the tank truck connector through the connector 10, if ethanol leaks at the connector 10, the leaked ethanol will flow to the collection ring 11 and be sucked into the flow chamber, and then enter the collection box 16 through the guide pipe 15, thus completing the timely collection of leaked ethanol. This avoids ethanol leakage from the connector 10 and prevents safety accidents. It also allows for the collection and reuse of leaked ethanol, avoiding waste of ethanol. The suction force can also strengthen the connection between the connector 10 and the tank truck connector, reducing the possibility of ethanol leakage.

[0022] like Figures 2-7 As shown, in a preferred embodiment of the present invention, the collecting ring 11 includes an inner ring 1101 and an outer ring 1102, with the inner ring 1101 located between the connector 10 and the outer ring 1102. The end of the inner ring 1101 near the first hose 9 is fixedly connected to the outer wall of the connector 10, and the end of the inner ring 1101 away from the first hose 9 is connected to the leak-proof structure 12. The end of the outer ring 1102 near the first hose 9 is connected to the second hose 13, and the end of the outer ring 1102 away from the first hose 9 is connected to the leak-proof structure 12.

[0023] The leak-proof structure 12 includes: An inner plate 1201, the end of which near the first flexible tube 9 is connected to an inner ring 1101, a filter ring 17 is provided at the connection between the inner plate 1201 and the inner ring 1101, and the filter ring 17 is coaxially arranged with the connector 10. There are multiple inner plates 1201 arranged circumferentially, and adjacent inner plates 1201 are connected by a flexible plate 1206. An outer plate 1202 is provided on the outside of each inner plate 1201, and each inner plate 1201 is slidably connected to each outer plate 1202. Adjacent outer plates 1202 are connected by a flexible plate 1206, and the outer plate 1202 is connected to the outer ring 1102 by a spring 1203.

[0024] In one embodiment, the flexible board 1206 is a deformable board material. In practical applications, a rubber board can be selected, which will not be elaborated here.

[0025] In practical application of this embodiment, during the alignment of connector 10 with the tank truck connector, multiple outer plates 1202 will first contact the outer wall of the tank truck, and after contacting the outer wall, they will be pushed in the opposite direction. The outer plates 1202 then move towards the first flexible hose 9. Figure 5 Taking the direction shown as an example, the outer plate 1202 is pushed upward, the spring 1203 is compressed, and the soft plate 1206 deforms accordingly, but always closes the gap between the two adjacent outer plates 1202 and the two adjacent inner plates 1201. The ethanol leaking from the connector 10 will first flow onto the outer plate 1202, and under the suction of the suction pump, it will flow towards the inner plate 1201. Then it will be filtered by the filter ring 17 and enter the gap between the inner ring 1101 and the outer ring 1102. Then it will flow upward into the flow chamber and then into the collection box 16 through the guide pipe 15. The filter ring 17 can filter and purify the leaked ethanol, which is convenient for the subsequent reuse of ethanol. During the docking of the connector 10 with the tank truck connector, the first hose 9 may need to be bent. When the position of the connector 10 is moved, the collection ring 11 will move synchronously, and the second hose 13 can also deform and backflow the leaked ethanol outside the first hose 9 so as to collect the leaked ethanol in time.

[0026] like Figures 3-7 As shown, in a preferred embodiment of the present invention, the outer plate 1202 is provided with a slot 1204, and the inner plate 1201 is provided with a plurality of slots 1205, and the slot 1204 engages with the slots 1205.

[0027] In one embodiment, the locking block 1205 is made of an elastic material, such as rubber, without any specific limitation. Pressing the locking block 1205 in the slot 1204 will separate it from the slot 1204, thus releasing the locking state between the inner plate 1201 and the outer plate 1202. This is prior art, and will not be described in detail in this embodiment.

[0028] In practical application, during the alignment of the connector 10 with the tank truck connector, multiple outer plates 1202 will first contact the outer wall of the tank truck and be pushed in the opposite direction after contacting the outer wall. The outer plates 1202 will then move towards the first hose 9. After the connector 10 and the tank truck connector are assembled, the outer plates 1202 will stop moving, and the corresponding locking block 1205 at this position will be locked into the locking slot 1204, completing the positioning of the outer plates 1202. This balances the elastic force of the spring 1203 to restore its deformation, preventing the elastic force from causing reverse pressure at the connection between the connector 10 and the tank truck connector, and reducing the possibility of loosening the connection.

[0029] like Figures 3-7As shown, in a preferred embodiment of the present invention, a push block 1208 is fixedly connected to the outer plate 1202, a limit switch 1207 is provided on the outer ring 1102, and an elastic element is provided at the connection between the two. The position of the limit switch 1207 interferes with the movement of the push block 1208, and the limit switch 1207 is connected to the suction pump.

[0030] In one embodiment, the elastic element can be a spring, or other elastic components such as silicone pillars or spring sheets can be used instead. No specific limitation is made in this embodiment. The limit switch 1207 is connected to an external controller. The limit switch 1207 is prior art, and this application has not improved it. Therefore, it is not necessary to disclose its specific mechanical structure and circuit structure, and it does not affect the integrity of this application.

[0031] In practical application, when the outer plate 1202 is abutted and moves toward the first hose 9, the push block 1208 triggers the limit switch 1207. The limit switch 1207 sends a signal to the external controller, which then controls the suction pump to start. Subsequently, during the movement of the outer plate 1202, the elastic element at the connection between the limit switch 1207 and the outer ring 1102 gradually deforms to avoid affecting the movement of the push block 1208 and the outer plate 1202.

[0032] like Figures 3-7 As shown, in a preferred embodiment of the present invention, a heating element 19 is provided on the inner wall of the inner ring 1101, and the heating element 19 is connected to the limit switch 1207.

[0033] In one embodiment, the heating element 19 includes a heating element, which is prior art and has not been improved in this application. Therefore, it is not necessary to disclose its specific mechanical structure and circuit structure, and this does not affect the integrity of this application.

[0034] In practical application, when the outer plate 1202 is abutted and moves toward the first hose 9, the push block 1208 triggers the limit switch 1207. The limit switch 1207 sends a signal to the external controller, which controls the heating element 19 to start, so as to heat the leaked ethanol flowing to the inner ring 1101 and avoid the problem that the ethanol will solidify and be difficult to flow back due to the low ambient temperature.

[0035] like Figures 1-9 As shown, in a preferred embodiment of the present invention, the connecting pipe 6 is provided with a transmission assembly 18 connected to the filter ring 17. When gas flows in the connecting pipe 6, the airflow triggers the transmission assembly 18, and the transmission assembly 18 drives the filter ring 17 to rotate.

[0036] The transmission assembly 18 includes: The rotating ring 1801 is fixedly installed on the outside of the filter ring 17 and the two are coaxially arranged. The rotating ring 1801 is connected to the transmission ring 1803 through the connecting rod 1802. The transmission ring 1803 is fixedly installed on the outside of the inner ring 1101 and the two are coaxially arranged. A gear ring 1805 is rotatably mounted on the inner wall of the top plate 14, and is coaxially arranged with the first flexible hose 9. The gear ring 1805 is connected to the transmission ring 1803 via a plurality of circumferentially arranged elastic connecting rods 1804. A gear 1806 is rotatably mounted on the inner wall of the top plate 14, and the gear 1806 meshes with the gear ring 1805. The housing 1808 is fixedly connected to the connecting pipe 6, and an impeller 1809 is rotatably installed inside it. The impeller 1809 is connected to the gear 1806 through the rotating shaft 1807, and the three are arranged coaxially. The rotating shaft 1807 passes through the connecting pipe 6, and a seal is provided at the connection between the two.

[0037] In one embodiment, the elastic connecting rod 1804 can be a rubber connecting rod or a wire or other structure, as long as it has the ability to deform and can achieve the connection function. This embodiment does not make specific limitations here. The sealing element can be sealing cotton or a rubber ring, as long as it can achieve the sealing function. This embodiment does not make specific limitations here.

[0038] In practical application, during the inflation of the loading arm, the gas agitates the fluid inside to accelerate its flow. The airflow impacts the impeller 1809, causing it to rotate. The rotating shaft 1807 rotates synchronously, driving the gear 1806 to rotate synchronously. Due to the meshing transmission, the gear ring 1805 can rotate. Under the transmission action of several elastic connecting rods 1804, the transmission ring 1803 located outside the inner ring 1101 is driven to rotate synchronously. This drives the rotating ring 1801 to rotate via the connecting rod 1802, thereby achieving the rotation of the filter ring 17. During the ethanol transportation process when the connector 10 is connected to the tank truck connector, the contact position between the leaking ethanol and the filter ring 17 can be changed in real time while the flow direction at the leak point remains constant. This avoids the filter ring 17 being blocked, which would affect the ethanol reflux. It also improves the filtration effect of ethanol. The continuously rotating filter ring 17 can also guide the ethanol to expand the ethanol flow area and accelerate the reflux rate.

[0039] Working principle of the invention: The above embodiments of the invention provide a skid-mounted ethanol loading arm. When the connector 10 is connected to the tank truck connector, the leak-proof structure 12 abuts against the outer wall of the tank truck and gradually tightens. After tightening, the connector 10 and the tank truck connector are assembled and connected. At this time, the leak-proof structure 12 drives the suction pump to start. Subsequently, during the process of ethanol flowing into the tank truck connector through the connector 10, if ethanol leakage occurs at the connector 10, the leaked ethanol will flow to the collection ring 11 and be sucked into the flow chamber, and then enter the collection box 16 through the guide pipe 15, thus completing the timely collection of leaked ethanol, avoiding safety accidents caused by ethanol leakage from the connector 10, and also collecting and reusing leaked ethanol to avoid ethanol waste. The suction force can also strengthen the connection between the connector 10 and the tank truck connector, reducing the possibility of ethanol leakage.

[0040] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A skid-mounted ethanol loading arm, characterized in that, include: The column (1) is fixedly installed on the skid frame and has an outer arm (2) fixed on it. The outer arm (2) is connected to the conveying pipe through the feed flange (4). The outer arm (2) is connected to the first inner arm (3) through the bend pipe. The first inner arm (3) is connected to the second inner arm (5) through the bend pipe. An air cylinder (7) is connected to the second inner arm (5), and an air valve (8) is provided at the connection between the two. The second inner arm (5) is connected to one end of the first hose (9) through the connecting pipe (6), and a connector (10) is provided at the other end of the first hose (9). The connector (10) is connected to the tank truck interface. A collection ring (11) is fixed to the outer wall of the connector (10), and the two are coaxially arranged. The end of the collection ring (11) away from the first hose (9) is provided with a leak-proof structure (12), and the leak-proof structure (12) abuts against the outer wall of the tank truck. The end of the collection ring (11) near the first hose (9) is connected to one end of the second hose (13), and the other end of the second hose (13) is connected to the top plate (14). The second hose (13) is sleeved on the outside of the first hose (9), and there is a flow cavity between the two. The top plate (14) is fixed on the connecting pipe (6), and a sealing element is provided at the connection between the two. The collection box (16) is fixed on the outer wall of the connecting pipe (6) and is connected to the flow chamber through the guide pipe (15). The collection box (16) is equipped with a suction pump and is connected to the anti-leakage structure (12). When the anti-leakage structure (12) is pressed against the outer wall of the tank truck, the anti-leakage structure (12) drives the suction pump to start, so as to draw the ethanol leaking from the joint (10) to the collection ring (11) into the flow chamber and then into the collection box (16) through the guide pipe (15).

2. The skid-mounted ethanol loading arm according to claim 1, characterized in that, The collection ring (11) includes an inner ring (1101) and an outer ring (1102). The inner ring (1101) is located between the connector (10) and the outer ring (1102). The end of the inner ring (1101) near the first hose (9) is fixedly connected to the outer wall of the connector (10), and the end of the inner ring (1101) away from the first hose (9) is connected to the leak-proof structure (12). The end of the outer ring (1102) near the first hose (9) is connected to the second hose (13), and the end of the outer ring (1102) away from the first hose (9) is connected to the leak-proof structure (12).

3. The skid-mounted ethanol loading arm according to claim 2, characterized in that, The leak-proof structure (12) includes: An inner plate (1201) is connected to an inner ring (1101) at its end near the first flexible tube (9). A filter ring (17) is provided at the connection between the inner plate (1201) and the inner ring (1101), and the filter ring (17) is coaxially arranged with the connector (10). There are multiple inner plates (1201), and the multiple inner plates (1201) are arranged in a circle. Adjacent inner plates (1201) are connected by a flexible plate (1206). An outer plate (1202) is provided on the outside of each inner plate (1201), and each inner plate (1201) and each outer plate (1202) are slidably connected. Adjacent outer plates (1202) are connected by a flexible plate (1206), and the outer plate (1202) is connected to the outer ring (1102) by a spring (1203).

4. A skid-mounted ethanol loading arm according to claim 3, characterized in that, The outer plate (1202) is provided with a slot (1204), and the inner plate (1201) is provided with a plurality of blocks (1205), and the slot (1204) engages with the blocks (1205).

5. A skid-mounted ethanol loading arm according to claim 3, characterized in that, A push block (1208) is fixedly connected to the outer plate (1202), and a limit switch (1207) is provided on the outer ring (1102). An elastic element is provided at the connection between the two. The position of the limit switch (1207) interferes with the movement of the push block (1208), and the limit switch (1207) is connected to the suction pump.

6. A skid-mounted ethanol loading arm according to claim 5, characterized in that, A heating element (19) is provided on the inner wall of the inner ring (1101), and the heating element (19) is connected to the limit switch (1207).

7. A skid-mounted ethanol loading arm according to claim 3, characterized in that, The connecting pipe (6) is provided with a transmission assembly (18) connected to the filter ring (17). When gas flows in the connecting pipe (6), the airflow triggers the transmission assembly (18), and the transmission assembly (18) drives the filter ring (17) to rotate.

8. A skid-mounted ethanol loading arm according to claim 7, characterized in that, The transmission assembly (18) includes: The rotating ring (1801) is fixedly installed on the outside of the filter ring (17) and the two are coaxially arranged. The rotating ring (1801) is connected to the transmission ring (1803) through the connecting rod (1802). The transmission ring (1803) is fixedly installed on the outside of the inner ring (1101) and the two are coaxially arranged. A gear ring (1805) is rotatably mounted on the inner wall of the top plate (14), and the gear ring (1805) is coaxially arranged with the first flexible hose (9). The gear ring (1805) is connected to the transmission ring (1803) through a plurality of circumferentially arranged elastic connecting rods (1804). A gear (1806) is rotatably mounted on the inner wall of the top plate (14), and the gear (1806) meshes with the gear ring (1805); and The housing (1808) is fixedly connected to the connecting pipe (6), and an impeller (1809) is rotatably installed inside it. The impeller (1809) is connected to the gear (1806) through the rotating shaft (1807), and the three are arranged coaxially. The rotating shaft (1807) passes through the connecting pipe (6), and a seal is provided at the connection between the two.

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