Loading and unloading vehicle integrated skid

Abstract

The present application relates to a combined loading and unloading truck skid, which includes a loading arm and also includes a quick docking device. The quick docking device includes a permanent magnet and an electromagnet. A section of the loading arm for docking with the loading and unloading pipe of a liquid hazardous chemical tank truck is a docking pipe. The permanent magnet is arranged at one end of the docking pipe facing the loading and unloading pipe of the liquid chemical transport tank truck, and the electromagnet is arranged on the loading and unloading pipe. A ring groove matching the loading and unloading pipe is opened at one end of the docking pipe facing the loading and unloading pipe. When the electromagnet is energized to adsorb the permanent magnet, the end of the loading and unloading pipe abuts against the bottom wall of the ring groove. The operator aligns the docking pipe with the loading and unloading pipe for docking, and then the electromagnet is energized to adsorb the permanent magnet. At this time, the end of the loading and unloading pipe abuts against the bottom wall of the ring groove, completing the docking of the docking pipe and the loading and unloading pipe, which can facilitate the docking of the loading arm and the loading and unloading pipe.

Description

Technical Field

[0001] The present invention relates to the field of fluid transportation, and in particular to an integrated skid for loading and unloading vehicles. Background Art

[0002] Liquid chemical tankers are vehicles used to hold and transport liquid chemicals, while loading and unloading skids are a type of fluid transport equipment. Currently, the transportation of liquid chemicals primarily relies on liquid chemical tankers, which in turn rely on loading and unloading skids. The skids' primary function is to complete the loading and unloading of liquid chemicals.

[0003] During loading operations on a related-art integrated loading and unloading skid, an operator docks the crane pipe on the skid with the loading and unloading pipe on a liquid chemical transport tanker. The docking is manual, and the loading and unloading pipe is equipped with a manual clamp. Once the crane pipe and the loading and unloading pipe are docked, the operator manually tightens the clamp to clamp and secure the crane pipe. Ball valves are installed on both the loading and unloading pipe and the crane pipe. The operator opens the ball valves on both the loading and unloading pipe and the crane pipe, allowing the liquid chemical to be transported through the crane pipe to the loading and unloading pipe and then into the liquid chemical transport tanker, completing the loading of the liquid chemical transport tanker.

[0004] The structural principle of the above-mentioned manual clamp is similar to the three-jaw centering device disclosed in the invention patent with publication number CN109676168A. The three-jaw centering device is locked by manually rotating the screw against the shaft.

[0005] The above-mentioned related technical solutions have the following defects: when the operator connects the crane pipe and the loading and unloading pipe, it is necessary to manually control the clamping claws to clamp the crane pipe to keep the crane pipe and the loading and unloading pipe in a docking state at all times. After the loading and unloading vehicle is completed, the clamping claws must be manually driven to disengage from the crane pipe, which makes the entire docking process of the crane pipe and the loading and unloading pipe more troublesome. Summary of the Invention

[0006] In order to facilitate the docking of the crane pipe and the loading and unloading pipe, the present application provides an integrated skid for a loading and unloading vehicle.

[0007] The present application provides a loading and unloading vehicle integrated skid adopting the following technical solution:

[0008] A loading and unloading vehicle integrated skid includes a crane pipe and a quick docking device, the quick docking device includes a permanent magnet and an electromagnet, the section that docks the crane pipe with the loading and unloading pipe of a liquid hazardous chemical tanker is the docking pipe, the permanent magnet is arranged at one end of the docking pipe facing the loading and unloading pipe of the liquid chemical transport tanker, the electromagnet is arranged on the loading and unloading pipe, and an annular groove matching the loading and unloading pipe is provided at the end of the docking pipe facing the loading and unloading pipe. When the electromagnet is energized to attract the permanent magnet, the end of the loading and unloading pipe abuts against the bottom wall of the annular groove.

[0009] Preferably, it further includes a pressure control device, which includes a pressure detection device, a first closing device, a pressure reducing device, and a second closing device. The pressure detection device is used to detect the hydraulic pressure in the docking pipe. The first closing device is used to close the ball valve on the docking pipe. The pressure reducing device is used to reduce the hydraulic pressure in the docking pipe and the loading and unloading pipe. The second closing device is used to close the ball valve on the loading and unloading pipe after the pressure reducing device reduces the hydraulic pressure in the docking pipe and the loading and unloading pipe to the normal value.

[0010] Preferably, the pressure detection device includes a block, a first limit block, a second limit block, a moving plate, and a first spring. The block is fixed on the outer wall of the docking pipe, and an inner cavity that is not communicated with the outside is opened in the block. The moving plate is slidably connected to the inner cavity in a straight line direction. The moving plate divides the inner cavity into a non-communicating first cavity and a second cavity. A first communication channel communicating with the second cavity is opened on the inner wall of the docking pipe. The first spring is arranged in the first cavity, and both ends of the first spring respectively abut against the inner wall of the first cavity far from the second cavity and the moving plate. The first spring is always in a compressed state. The first limit block and the second limit block are respectively fixed on the inner wall of the inner cavity. The first limit block is located in the first cavity, and the second limit block is located in the second cavity. When the hydraulic pressure in the docking pipe is normal, the moving plate abuts against the second limit block. When the hydraulic pressure in the docking pipe is too high, the moving plate moves towards the first limit block and abuts against the first limit block.

[0011] Preferably, the first closing device includes a switch and a controller. The ball valve on the docking pipe is an electric ball valve. The controller is used to control the closing of the electric ball valve. The switch is used to trigger the operation of the controller. The switch is arranged on the side surface of the second limit block facing the moving plate. When the moving plate moves to abut against the switch, the switch is turned on, and the controller controls the electric ball valve on the docking pipe to close.

[0012] Preferably, the pressure reducing device includes a first driving member, a pressure reducing box, and a plug. The pressure reducing box is fixed on the outer wall of the docking pipe. A pressure reducing cavity that is not communicated with the outside is opened in the pressure reducing box. A liquid inlet channel and a liquid outlet channel communicating with the temporary storage cavity are opened on the inner wall of the docking pipe. A one-way valve is arranged on the liquid outlet channel to only allow the liquid chemical in the pressure reducing cavity to enter the docking pipe. The plug is slidably connected to the inner wall of the pressure reducing cavity close to the liquid inlet channel. The first driving member drives the plug to move. When the plug moves to be directly opposite to the liquid inlet channel, the plug is used to block the liquid inlet channel.

[0013] Preferably, the first driving member is a first connecting rod. The pressure reducing box is located on the side of the second chamber away from the first chamber. The first connecting rod is slidably connected to the block along the sliding direction parallel to the moving plate. The two ends of the first connecting rod are respectively fixedly connected to the moving plate and the plug. When the hydraulic pressure in the docking pipe is normal, the plug seals the liquid inlet passage so that the liquid inlet passage is no longer communicated with the pressure reducing chamber. When the hydraulic pressure in the docking pipe is too high, the plug moves away from the liquid inlet passage and the liquid inlet passage is communicated with the pressure reducing chamber.

[0014] Preferably, the second closing device includes a second driving member, a pulling rope, a bracket and a slider. The bracket is used to be fixed on the loading and unloading pipe, and the bracket does not affect the docking of the loading and unloading pipe and the docking pipe. The slider is slidably connected to the bracket along the axial direction parallel to the loading and unloading pipe. The second driving member drives the slider to slide on the bracket. The ball valve on the loading and unloading pipe is a manual ball valve. The two ends of the pulling rope are respectively fixed to the slider and the valve stem of the manual ball valve. When the second driving member drives the slider to move away from the manual ball valve to a certain position, the manual ball valve closes.

[0015] Preferably, the second driving member includes a reset member, a driving block and a second connecting rod. The driving block is located on the side of the first chamber away from the second chamber. The driving block includes a first block, a second block and a second spring. The first block is slidably connected to the docking pipe along the axial direction parallel to the docking pipe. The second block is located on the side of the first block away from the docking pipe. A first groove matching the first block is formed on the side surface of the second block facing the first block. The second block is sleeved and slidably connected to the first block along the direction perpendicular to the axial direction of the docking pipe. The two ends of the second spring are respectively fixed to the first block and the bottom wall of the first groove;

[0016] The sliding direction of the moving plate is parallel to the axial direction of the docking pipe. The second connecting rod is slidably connected to the block along the sliding direction parallel to the moving plate. The two ends of the second connecting rod are respectively fixedly connected to the first block and the moving plate. A second groove for the second connecting rod to move is formed on the inner wall of the first groove near the second connecting rod. The sliding of the second block does not affect the second connecting rod;

[0017] A chute is formed on the bracket. The slider is slidably connected to the chute along the axial direction parallel to the docking pipe. A first inclined surface is formed at one end of the second block away from the block. A third groove capable of accommodating the slider is formed on the side surface of the second block away from the first block; when the hydraulic pressure in the docking pipe is normal, the second block is located on the side of the slider away from the manual ball valve, and the distance from the first inclined surface away from the docking pipe to the end close to the docking pipe to the slider gradually decreases; when the hydraulic pressure in the docking pipe is too high, the slider moves to abut against the end wall of the chute close to the manual ball valve, and the slider is partially located in the third groove;

[0018] The reset member is used to drive the second block to move after the manual ball valve is closed until the slider disengages from the third groove. The reset member includes a third spring and a third block. The third block is located on the side of the slider away from the pulling rope. The third block is slidably connected to the bracket along a direction parallel to the sliding direction of the second block on the first block. The third spring is arranged between the third block and the bracket. When no external force acts on the third block, the third block is disposed opposite to the slider. An end of the third block close to the slider is provided with a second inclined surface. The distance from the end of the second inclined surface away from the docking pipe to the end close to the docking pipe and towards the slider gradually decreases. After the second block drives the slider to move to close the manual ball valve, the second block drives the third block to move towards the second block until the slider disengages from the third groove.

[0019] The technical effects of the present invention are mainly reflected in the following aspects:

[0020] 1. By providing an electromagnet and a permanent magnet in the present invention, the operator aligns the docking pipe with the loading and unloading pipe and docks them well, and then the electromagnet is energized to adsorb the permanent magnet. At this time, the end of the loading and unloading pipe abuts against the bottom wall of the annular groove, completing the docking of the docking pipe and the loading and unloading pipe, which can facilitate the docking of the loading arm and the loading and unloading pipe.

[0021] 2. By providing a reset member in the present invention, the reset member is used to drive the second block to move after the manual ball valve is closed until the slider disengages from the third groove, so as to reset the driving block. After the driving block automatically resets, it can facilitate the decompression of the docking pipe and the loading and unloading pipe when the pressure in the docking pipe is too high next time. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the loading and unloading vehicle integrated skid of the embodiment of the present application.

[0023] Figure 2 is a schematic structural diagram of the loading and unloading pipe of the embodiment of the present application.

[0024] Figure 3 is a cross-sectional view of the docking pipe and the loading and unloading pipe after docking under normal pressure in the docking pipe of the embodiment of the present application.

[0025] Figure 4 is a cross-sectional view of the docking pipe and the loading and unloading pipe after docking when the pressure in the docking pipe is too high in the embodiment of the present application.

[0026] Figure 5 is a cross-sectional view of the docking pipe and the loading and unloading pipe after docking when the pressure in the docking pipe gradually changes from too high to normal in the embodiment of the present application.

[0027] Figure 6 is Figure 3 an enlarged view of part A in

[0028] Figure 7 is Figure 3 an enlarged view of part B in

[0029] Description of reference numerals: 1. Steel structure skid; 11. Pipeline; 12. Batch controller; 13. Flowmeter; 14. Control valve; 15. Pump; 16. Filter; 17. Pressure gauge; 18. Thermometer; 19. Safety interlock; 2. Loading and unloading arm; 21. Docking pipe; 211. Ring groove; 212. First connecting channel; 213. Liquid inlet channel; 214. Liquid outlet channel; 215. Third limiting groove; 22. Quick docking device; 221. Permanent magnet; 222. Electromagnet; 23. Electric ball valve; 24. Check valve; 3. Loading and unloading pipe; 31. Manual ball valve; 311. Valve stem; 4. Pressure control device; 5. Pressure detection device; 51. Block; 52. Inner cavity; 521. First cavity; 522. Second cavity; 53. First limiting block; 54. Second limiting block; 55. Moving plate; 56. First spring; 6. Pressure reducing device; 61. Driving part one; 611. First connecting rod; 612. First rod; 613. Second rod; 614. Fourth limiting block; 615. Transverse groove; 616. Fourth limiting groove; 62. Pressure reducing box; 621. Pressure reducing cavity; 622. Avoidance opening; 63. Plug; 64. Third limiting block; 7. Second closing device; 71. Pulling rope; 72. Bracket; 721. Sliding groove; 722. Extension groove; 73. Slide block; 8. Driving part two; 81. Driving block; 811. First block; 812. Second block; 8121. First inclined surface; 8122. Third groove; 813. Second spring; 82. Second connecting rod; 83. First groove; 84. Second groove; 9. Reset part; 91. Third spring; 92. Third block; 921. Second inclined surface. Embodiment

[0030] The following will further describe the present application in detail with reference to the Figures 1-7 accompanying drawings to make the technical solution of the present application easier to understand and master.

[0031] The embodiment of the present application discloses an integrated loading and unloading skid.

[0032] Referring to Figure 1 , the integrated loading and unloading skid of this embodiment includes a steel structure skid, and pipelines, batch controllers, flowmeters, control valves, pumps, filters, pressure gauges, thermometers, safety interlocks, loading and unloading arms, etc. are arranged on the steel structure skid.

[0033] The pipeline is a pipeline that realizes the connection between various functional components and is used to transport fluids.

[0034] The batch controller is the core device for realizing automatic quantitative loading. Its main function is to perform program control and logic interlock signal processing on the loading and unloading process to complete the function of automatic quantitative loading and unloading.

[0035] The flowmeter is selected according to the medium properties. The flowmeter is installed on the pipeline to monitor the fluid flow during the loading and unloading process of the vehicle, and is interlocked with the control valve to control the loading and unloading flow rate.

[0036] The control valve is installed on the pipeline and used to control the flow rate during the fluid loading and unloading process of the vehicle, improve the loading accuracy, and prevent the occurrence of "water hammer" phenomenon during loading and unloading.

[0037] The pump is a pressurization device for the fluid during the loading and unloading of the vehicle.

[0038] The filter is installed in the pipeline to filter impurities in the pipeline and the material, and protect the pump and corresponding instrument valves.

[0039] The pressure gauge is installed on the pipeline and used to monitor the pressure parameters of the fluid during the loading and unloading process of the vehicle.

[0040] The thermometer is installed on the pipeline and used to monitor the temperature parameters of the fluid during the loading and unloading process of the vehicle.

[0041] The safety interlock is used to provide protection measures such as anti-static and anti-overflow oil during the loading and unloading process of the vehicle.

[0042] The loading and unloading arm is a loading and unloading device for the fluid medium of tank trucks and tank ships.

[0043] The above components cooperate with each other to finally realize the loading and unloading function of the loading and unloading integrated skid for vehicles.

[0044] Refer to Figure 2 、 Figure 3 Let the pipeline connecting the liquid hazardous chemical tank truck and the loading and unloading arm be the loading and unloading pipeline. Since the loading and unloading arm has multiple sections, let the section of the loading and unloading arm connected to the loading and unloading pipeline of the liquid hazardous chemical tank truck be the docking pipeline. Ball valves are provided on both the loading and unloading pipeline and the loading and unloading arm. During the loading operation, the operator docks and connects the loading and unloading arm with the loading and unloading pipeline of the liquid chemical product transportation tank truck, and the operator opens the ball valves on the loading and unloading pipeline and the loading and unloading arm. The liquid chemical product is transported through the loading and unloading arm to the loading and unloading pipeline and then enters the liquid chemical product transportation tank truck to complete the loading of the liquid chemical product transportation tank truck.

[0045] Refer to Figure 2 、 Figure 3 The loading and unloading integrated skid of this embodiment further includes a quick docking device. The quick docking device includes a permanent magnet and an electromagnet. Both the permanent magnet and the electromagnet are arranged in a ring shape. The permanent magnet is coaxially fixed at one end of the docking pipeline facing the loading and unloading pipeline of the liquid hazardous chemical tank truck, and the electromagnet is coaxially fixedly sleeved on the loading and unloading pipeline. A ring groove matching the loading and unloading pipeline is opened at one end of the docking pipeline facing the loading and unloading pipeline. The operator aligns the docking pipeline with the loading and unloading pipeline and docks them well, and then the electromagnet is energized to adsorb the permanent magnet. At this time, the end of the loading and unloading pipeline abuts against the bottom wall of the ring groove to complete the docking of the docking pipeline and the loading and unloading pipeline. In order to improve the sealing performance of the connection between the loading and unloading pipeline and the docking pipeline, several sealing rings can also be coaxially installed on the inner wall of the ring groove.

[0046] Referring to Figures 3-5 , the integrated loading and unloading truck skid of this embodiment further includes a pressure control device, which includes a pressure detection device, a first closing device, a pressure reducing device and a second closing device. The pressure detection device is used to detect the hydraulic pressure in the docking pipe. The first closing device is used to close the ball valve on the docking pipe. The pressure reducing device is used to reduce the hydraulic pressure in the docking pipe and the loading and unloading pipe. The second closing device is used to close the ball valve on the loading and unloading pipe after the pressure reducing device reduces the hydraulic pressure in the docking pipe and the loading and unloading pipe to the normal value.

[0047] Referring to Figures 3-5 , the pressure detection device includes a block, a first limiting block, a second limiting block, a moving plate and a first spring. The block is fixed on the outer wall of the docking pipe. An inner cavity that is not communicated with the outside is provided in the block. The moving plate is slidably connected to the inner cavity along the axis direction parallel to the docking pipe. The moving plate divides the inner cavity into a non-communicating first cavity and second cavity. A first communication channel communicating with the second cavity is provided on the inner wall of the docking pipe. The first spring is arranged in the first cavity, and both ends of the first spring respectively abut against the moving plate and the inner wall of the first cavity far from the second cavity. The first limiting block and the second limiting block are hollow squares matching the inner wall of the inner cavity. The first limiting block is located in the first cavity and fixed on the inner wall of the first cavity. The second limiting block is located in the second cavity and fixed on the inner wall of the second cavity. The first spring is always in a compressed state. When the hydraulic pressure in the docking pipe is normal, the moving plate moves under the action of the first spring to abut against the second limiting block. When the hydraulic pressure in the docking pipe is too high, since the second cavity is communicated with the docking pipe through the first communication channel, the pressure in the second cavity will also increase, and the moving plate will gradually move toward the first limiting block side until it abuts against the first limiting block.

[0048] Referring to Figure 3 , the first closing device includes a switch and a controller (not shown in the figure). The ball valve on the docking pipe is an electric ball valve. The controller is used to control the closing of the electric ball valve. The switch is used to trigger the operation of the controller. The switch is embedded and installed on the side surface of the second limiting block facing the moving plate. The switch is a contact switch. When the hydraulic pressure in the docking pipe is too high and the moving plate moves to abut against the switch, the switch is turned on at this time, and the controller controls the electric ball valve on the docking pipe to close.

[0049] Referring to Figure 3 , Figure 6, the pressure relief device includes a first driving member, a pressure relief box and a plug. The pressure relief box is fixed on the outer wall of the docking pipe. The pressure relief box is located outside the block and on the side of the second chamber away from the first chamber. A non-ventilated pressure relief chamber is provided inside the pressure relief box. An inlet channel and an outlet channel communicating with the temporary storage chamber are provided on the inner wall of the docking pipe. The outlet channel is located on the side of the inlet channel away from the block. A one-way valve is installed on the outlet channel to allow only the liquid chemical in the pressure relief chamber to enter the docking pipe. The plug is slidably connected to the inner wall of the pressure relief chamber near the inlet channel along the axis direction of the docking pipe, which is also equivalent to being slidably connected to the outer wall of the docking pipe. The first driving member drives the plug to move. When the plug moves to align with the inlet channel, the plug is used to block the inlet channel.

[0050] Referring to Figures 3-6 , to better limit the movement of the plug, a third limiting block is fixed on the plug. A third limiting groove is provided on the outer wall of the docking pipe along the axis direction of the docking pipe. The third limiting block is slidably connected to the third limiting groove along the axis direction of the docking pipe. An avoidance opening that does not affect the movement of the plug is provided on the pressure relief box. The avoidance opening communicates with the outside. The plug always blocks the avoidance opening during the sliding process. When the plug moves until the third limiting block abuts against the side wall of the third limiting groove close to the block, the plug moves away from the inlet channel. At this time, the plug moves away from the inlet channel and makes the inlet channel communicate with the pressure relief chamber. When the plug moves until the third limiting block abuts against the side wall of the third limiting groove away from the block, the plug moves to align with the inlet channel to block it and the inlet channel no longer communicates with the pressure relief chamber.

[0051] Referring to Figures 3-6 , the first driving member is a first connecting rod. The first connecting rod includes a first rod and a second rod. The length directions of the first rod and the second rod are both arranged parallel to the axis direction of the docking pipe. A transverse groove matching the second rod is provided at one end of the first rod along the length direction of the first rod. The second rod is slidably connected to the transverse groove along the axis direction of the docking pipe. A fourth limiting block is fixed on the outer wall of the second rod. A fourth limiting groove is provided on the inner wall of the transverse groove. The fourth limiting block is slidably connected to the fourth limiting groove along the sliding direction of the second rod. The second rod passes through and is slidably connected to the block. The second rod does not affect the sealing of the second chamber. The end of the first rod away from the second rod is fixed on the plug. The end of the second rod away from the first rod is fixed on the moving plate. By providing the first connecting rod, the distance between the block and the pressure relief box can be shortened, making the overall structure more compact. At the same time, the moving distance of the plug can also be shortened.

[0052] Referring to Figures 3-6, when the hydraulic pressure in the docking pipe is normal, the plug moves to the third limit block and abuts against the side wall of the third limit groove away from the block body. At this time, the plug blocks the liquid inlet channel. When the hydraulic pressure in the docking pipe is too high, the plug moves to the third limit block and abuts against the side wall of the third limit groove close to the block body. At this time, the liquid inlet channel is communicated with the decompression cavity, and the liquid chemical in the docking pipe can flow into the decompression cavity through the liquid inlet channel, so that the pressure in the docking pipe can drop back to the normal level. The liquid chemical temporarily stored in the decompression cavity can flow back into the docking pipe through the liquid outlet channel under specific conditions.

[0053] Refer to Figure 2 , Figure 3 and Figure 7 , the second closing device includes a second driving member, a pulling rope, a bracket and a sliding block. The bracket is fixed on the loading and unloading pipe and does not affect the docking of the loading and unloading pipe and the docking pipe. A sliding groove is formed on the outer wall of the bracket along the axial direction of the loading and unloading pipe. One end of the sliding block in the length direction is slidably connected in the sliding groove along the length direction of the sliding groove, and the second driving member drives the sliding block to slide on the bracket. The ball valve on the loading and unloading pipe is a manual ball valve. The bracket is located on the side of the manual ball valve close to the docking pipe. The two ends of the pulling rope are respectively fixed on the sliding block and the valve stem of the manual ball valve. When the second driving member drives the sliding block to move away from the manual ball valve to a certain position, the manual ball valve closes.

[0054] Refer to Figure 2 , in order to make the sliding block drive the closing of the manual ball valve more labor-saving through the pulling rope, a force-applying rod can also be fixed on the valve stem of the manual ball valve, and then the pulling rope is fixed on the force-applying rod, and the pulling rope drives the valve stem to rotate more labor-saving by lengthening the force arm.

[0055] Refer to Figures 3-5 and Figure 6 , the second driving member includes a reset member, a driving block and a second connecting rod. The driving block is located outside the block body and on the side of the first cavity away from the second cavity. The driving block includes a first block, a second block and a second spring. The first block is slidably connected to the outer wall of the docking pipe along the axial direction of the docking pipe. The second block is located on the side of the first block away from the docking pipe. A first groove matching the first block is formed on the side surface of the second block facing the first block. The second block is sleeved and slidably connected to the first block along the direction perpendicular to the axial direction of the docking pipe. The two ends of the second spring are respectively fixed on the side surface of the first block away from the docking pipe and the bottom wall of the first groove.

[0056] Refer to Figures 3-5 and Figure 6, the second connecting rod passes through and is slidably connected to the block along a direction parallel to the sliding direction of the moving plate, and the second connecting rod does not affect the sealing of the first cavity. The two ends of the second connecting rod are respectively fixedly connected to the first block and the two end faces of the moving plate close to each other. On the inner wall of the first groove facing the second connecting rod, a second groove for the movement of the second connecting rod is opened along a direction parallel to the sliding direction of the second block, and the sliding of the second block does not affect the second connecting rod.

[0057] Refer to Figures 3-5 and Figure 6 , one end of the second block away from the block is provided with a first inclined surface, and a third groove capable of accommodating the slider is opened on the side surface of the second block away from the first block. When the hydraulic pressure in the docking pipe is normal, the second block is located on the side of the slider away from the manual ball valve. Taking this state as a reference, the distance from the end of the first inclined surface away from the docking pipe to the end close to the docking pipe to the slider gradually decreases.

[0058] Refer to Figures 3-5 and Figure 6 , when the hydraulic pressure in the docking pipe is too high, the moving plate drives the second block to move towards the slider side through the second connecting rod until the first inclined surface abuts against the slider. At this time, the slider will also move to abut against the end wall of the chute close to the manual ball valve. Under the action of the first inclined surface, the second block will move towards the first block side until the second block moves to the side of the slider close to the loading and unloading pipe. Then, as the driving block continues to move, when the slider is aligned with the third groove, under the action of the second spring, the second block moves towards the slider side again, causing the slider to abut against the bottom wall of the third groove. As the pressure in the docking pipe decreases, under the action of the first spring, when the moving plate drives the driving block to gradually move away from the loading and unloading pipe side, the second block will hook the slider and move towards the side away from the manual valve rod, thereby driving the valve rod to rotate until the manual ball valve is closed.

[0059] Refer to Figures 3-5 and Figure 6 , the reset member is used to drive the second block to move until the slider disengages from the third groove after the manual ball valve is closed, so as to reset the driving block. The reset member includes a third spring and a third block. The third block is located on the side of the slider away from the pull rope. The bracket is provided with an extension groove on one side surface of the chute. The length direction of the extension groove is parallel to the sliding direction of the second block on the first block, and the top end of the extension groove communicates with the end of the chute away from the manual ball valve. The length direction of the third block is parallel to the length direction of the slider, and one end of the second block is slidably connected in the extension groove along the length direction of the extension groove. The third spring is located in the extension groove and on the side of the third block close to the loading and unloading pipe. The two ends of the third spring are respectively fixed on the end wall of the extension groove and the third block.

[0060] Refer to Figures 3-5 and Figure 6, when no external force acts on the third block, the third block moves to the end of the extension groove under the action of the third spring and is arranged opposite to the slider. A second inclined surface is formed at the end of the third block close to the slider, and the distance from the end of the second inclined surface far from the docking pipe to the end close to the docking pipe to the slider gradually decreases.

[0061] Referring to Figures 3-5 and Figure 6 , as the pressure in the docking pipe drops, during the process that the second block hooks the slider and moves towards the side away from the manual valve rod, the slider will move to abut against the third block. Under the action of the second inclined surface, the third block is driven to move towards the second block until the slider disengages from the third groove. At this time, the manual ball valve just closes. Then the driving block will continue to move with the moving plate. When the moving plate moves to abut against the first limiting block, the driving block is located on the side of the third block away from the slider. After the driving block automatically resets, it can facilitate the decompression of the docking pipe and the loading and unloading pipe when the pressure in the docking pipe is too high next time.

[0062] Of course, the above are only typical examples of the present application. In addition, the present application can also have many other specific implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. An integrated loading and unloading truck skid, including a loading arm, characterized in that: It further includes a quick docking device, which includes a permanent magnet and an electromagnet. The section for docking the loading and unloading pipe of the liquid chemical tanker with the loading and unloading pipe of the liquid hazardous chemical tanker is the docking pipe. The permanent magnet is arranged at one end of the docking pipe facing the loading and unloading pipe of the liquid chemical transportation tanker, and the electromagnet is arranged on the loading and unloading pipe. A ring groove matching the loading and unloading pipe is opened at one end of the docking pipe facing the loading and unloading pipe. When the electromagnet is energized to adsorb the permanent magnet, the end of the loading and unloading pipe abuts against the bottom wall of the ring groove; It further includes a pressure control device, which includes a pressure detection device, a first closing device, a pressure reducing device, and a second closing device; The pressure detection device includes a block, a first limiting block, a second limiting block, a moving plate, and a first spring. The block is fixed on the outer wall of the docking pipe, and an inner cavity not communicating with the outside is opened in the block. The moving plate is slidably connected to the inner cavity in a straight line direction. The moving plate divides the inner cavity into a first cavity and a second cavity that do not communicate with each other. A first communication channel communicating with the second cavity is opened on the inner wall of the docking pipe. The first spring is arranged in the first cavity, and both ends of the first spring respectively abut against the inner wall of the first cavity far from the second cavity and the moving plate. The first spring is always in a compressed state. The first limiting block and the second limiting block are respectively fixed on the inner wall of the inner cavity. The first limiting block is located in the first cavity, and the second limiting block is located in the second cavity; The first closing device includes a switch and a controller. The ball valve on the docking pipe is an electric ball valve. The controller is used to control the closing of the electric ball valve. The switch is used to trigger the operation of the controller. The switch is arranged on the side surface of the second limiting block facing the moving plate. When the moving plate moves to abut against the switch, the switch is turned on, and the controller controls the electric ball valve on the docking pipe to close; The pressure reducing device includes a driving member 1, a pressure reducing box, and a plug. The pressure reducing box is fixed on the outer wall of the docking pipe. A pressure reducing cavity not communicating with the outside is opened in the pressure reducing box. An inlet channel and an outlet channel communicating with the temporary storage cavity are opened on the inner wall of the docking pipe. A one-way valve is arranged on the outlet channel to only allow the liquid chemical in the pressure reducing cavity to enter the docking pipe. The plug is slidably connected to the inner wall of the pressure reducing cavity close to the inlet channel. The driving member 1 drives the plug to move. When the plug moves to face the inlet channel, the plug is used to block the inlet channel; The driving member 1 is a first connecting rod, and both ends of the first connecting rod are respectively fixedly connected to the moving plate and the plug. The second closing device includes a driving member 2, a pull rope, a bracket, and a slider. The bracket is used to be fixed on the loading and unloading pipe; The slider is slidably connected to the bracket along the axial direction parallel to the loading and unloading pipe. The driving member 2 drives the slider to slide on the bracket. The ball valve on the loading and unloading pipe is a manual ball valve. Both ends of the pull rope are respectively fixed to the slider and the valve stem of the manual ball valve; The second driving member includes a reset member, a driving block, and a second connecting rod. The driving block is located on the side of the first chamber away from the second chamber. The driving block includes a first block, a second block, and a second spring. The first block is slidably connected to the docking pipe along a direction parallel to the axis of the docking pipe. The second block is located on the side of the first block away from the docking pipe. A first groove matching the first block is formed on the side surface of the second block facing the first block. The second block is sleeved on the first block and slidably connected to the first block along a direction perpendicular to the axis of the docking pipe. The two ends of the second spring are respectively fixed on the first block and the bottom wall of the first groove; The sliding direction of the moving plate is parallel to the axis direction of the docking pipe. The second connecting rod is slidably connected to the block along the sliding direction of the moving plate. The two ends of the second connecting rod are respectively fixedly connected to the first block and the moving plate. A second groove for the second connecting rod to move is formed on the inner wall of the first groove near the second connecting rod. The sliding of the second block does not affect the second connecting rod; A sliding groove is formed on the bracket. The slider is slidably connected to the sliding groove along a direction parallel to the axis of the docking pipe. A first inclined surface is formed at one end of the second block away from the block. A third groove capable of accommodating the slider is formed on the side surface of the second block away from the first block; when the hydraulic pressure in the docking pipe is normal, the second block is located on the side of the slider away from the manual ball valve, and the distance from the end of the first inclined surface away from the docking pipe to the end close to the docking pipe to the slider gradually decreases; when the hydraulic pressure in the docking pipe is too high, the slider moves to abut against the end wall of the sliding groove close to the manual ball valve, and part of the slider is located in the third groove; The reset member is used to drive the second block to move so that the slider disengages from the third groove after the manual ball valve is closed. The reset member includes a third spring and a third block. The third block is located on the side of the slider away from the pull rope. The third block is slidably connected to the bracket along the sliding direction of the second block on the first block. The third spring is arranged between the third block and the bracket. When no external force acts on the third block, the third block is arranged opposite to the slider. A second inclined surface is formed at the end of the third block close to the slider. The distance from the end of the second inclined surface away from the docking pipe to the end close to the docking pipe to the slider gradually decreases. After the second block drives the slider to move to close the manual ball valve, the second block drives the third block to move towards the second block so that the slider disengages from the third groove.

2. The integrated loading and unloading truck skid according to claim 1, characterized in that: The pressure detection device is used to detect the hydraulic pressure in the docking pipe. The first closing device is used to close the ball valve on the docking pipe. The pressure reducing device is used to reduce the hydraulic pressure in the docking pipe and the loading and unloading pipe. The second closing device is used to close the ball valve on the loading and unloading pipe after the pressure reducing device reduces the hydraulic pressure in the docking pipe and the loading and unloading pipe to the normal value.

3. The integrated loading and unloading truck skid according to claim 1, characterized in that: When the hydraulic pressure in the docking pipe is normal, the moving plate abuts against the second limiting block. When the hydraulic pressure in the docking pipe is too high, the moving plate moves towards the first limiting block and abuts against the first limiting block.

4. The integrated loading and unloading truck skid according to claim 1, characterized in that: The pressure reducing box is located on the side of the second chamber away from the first chamber. The first connecting rod is slidably connected to the block along the sliding direction parallel to the moving plate. When the hydraulic pressure in the docking pipe is normal, the plug blocks the liquid inlet channel so that the liquid inlet channel is no longer in communication with the pressure reducing chamber. When the hydraulic pressure in the docking pipe is too high, the plug moves away from the liquid inlet channel and makes the liquid inlet channel communicate with the pressure reducing chamber.

5. The integrated loading and unloading truck skid according to claim 1, characterized in that: The bracket does not affect the docking of the loading and unloading pipe and the docking pipe. When the second driving member drives the slider to move towards the side away from the manual ball valve to a certain position, the manual ball valve closes.

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