Electric vertical pipe of train under-liquid loading and unloading vehicle

Abstract

The invention relates to the technical field of fluid loading and unloading equipment, and discloses an electric vertical pipe of a train submerged loading and unloading vehicle, an outer sleeve, a middle sleeve and an inner sleeve are sequentially and coaxially sleeved to form a telescopic fluid channel; sliding sealing structures are respectively arranged between the outer sleeve and the middle sleeve and between the middle sleeve and the inner sleeve; the steel wire take-up and pay-off machine is connected with the inner sleeve through a The hydraulic oil replacing pump is arranged at the outlet end of the inner sleeve; the hydraulic pipeline is connected to the hydraulic oil replacing pump; a hydraulic oil replacing pump is directly arranged at the outlet end of the inner sleeve, so that liquid is sucked and output from the tank bottom, the whole loading and unloading process is ensured to be performed below the liquid level, volatilization loss and oil gas dissipation are thoroughly avoided, and the explosion risk and environmental pollution are remarkably reduced; the steel wire take-up and pay-off machine drives the sleeve to stretch out and draw back, automatic lifting of the vertical pipe is achieved, and manual operation risks are avoided. The three layers of sleeves are nested and telescopic, and are shrunk when not working, so that the occupied space is reduced; the problems that efficiency is low and safety risks exist in the manual loading process of the vertical pipe of the loading and unloading vehicle are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid loading and unloading equipment, and in particular to an electric vertical pipe of a train underwater loading and unloading vehicle. Background Art

[0002] Currently, loading flammable liquids onto tank cars mainly relies on manual loading and unloading of drop tubes. This method has significant drawbacks: it is highly labor-intensive and requires manual operation of the drop tubes, including positioning, insertion, and lifting. Significant safety hazards: Manual close-range handling of flammable and explosive liquids poses safety risks such as collision, static electricity ignition (especially during the insertion / extraction of the plumbing pipe), and personnel falls; Low loading and unloading efficiency: Submersible loading and unloading equipment mostly uses fixed-length vertical pipes, which cannot adapt to tank trucks with different liquid levels. Manual operation is slow and cannot meet the needs of rapid turnover in modern logistics. Summary of the Invention

[0003] The purpose of the present invention is to provide an electric drop pipe for a train underwater loading and unloading vehicle, aiming to solve the problems of low efficiency and safety risks of the drop pipe for the loading and unloading vehicle in manual loading in the prior art.

[0004] The present invention is realized in this way: an electric drop pipe for a train underwater loading and unloading vehicle comprises a wire retractor, a liquid inlet, an outer sleeve, a middle sleeve, an inner sleeve, a train sealing cap, a hydraulic oil displacement pump and a hydraulic pipeline. The upper end of the outer sleeve is connected to the liquid inlet, the lower end of the outer sleeve is connected to the train sealing cap, and the bottom end of the train sealing cap is provided with a sealing ring for sealingly connecting with the tank port of the train tank car; the middle sleeve is sleeved inside the outer sleeve and can be telescopically moved relative to the outer sleeve, the inner sleeve is sleeved inside the middle sleeve and can be telescopically moved relative to the middle sleeve, the outer sleeve, middle sleeve and inner sleeve are coaxially sleeved in sequence to form a telescopic fluid channel; sliding sealing structures are provided between the outer sleeve and the middle sleeve, and between the middle sleeve and the inner sleeve respectively; The wire retractor is connected to the inner casing via a wire rope, and is used to drive the extension and retraction of the middle casing and the inner casing; the hydraulic oil replacement pump is arranged at the outlet end of the inner casing, and is used to realize underwater loading and unloading; the hydraulic pipeline is connected to the hydraulic oil replacement pump, and is used to provide hydraulic power to the hydraulic oil replacement pump.

[0005] Furthermore, the hydraulic oil replacement pump includes a hydraulic motor, a pump body, and a fluid infusion pipe. The hydraulic motor is connected to the top of the pump body. A plurality of suction pipes are provided at the bottom of the pump body. The plurality of suction pipes are arranged at intervals along the circumference of the bottom of the pump body. The pump body is connected to the outlet end of the inner casing through the fluid infusion pipe. The hydraulic pipelines are respectively connected to both sides of the hydraulic motor to provide hydraulic power to the hydraulic motor.

[0006] Furthermore, the two hydraulic pipelines are respectively an inlet pipe for supplying hydraulic pressure into the hydraulic motor and an outlet pipe for supplying hydraulic pressure out of the hydraulic motor. The inlet pipe and the outlet pipe respectively pass through both sides of the train sealing cap and are connected to both sides of the hydraulic motor to provide hydraulic power to the hydraulic motor.

[0007] Furthermore, the hydraulic pipeline includes a fixed tube and a telescopic inner tube. The upper end of the fixed tube extends along the height direction of the outer tube. The outer tube is connected to the upper end of the fixed tube through a tube clamp. The lower end of the fixed tube passes through the train sealing cap and is exposed below the train sealing cap. The telescopic inner tube is inserted into the interior of the fixed tube and can be telescopically moved relative to the fixed tube. The fixed tube is connected to the hydraulic motor through the telescopic inner tube.

[0008] Furthermore, the outer sleeve has a hollow outer tube lumen, and the bottom opening of the outer tube lumen is provided with a middle tube limiting ring for limiting the movement distance of the middle sleeve; the middle sleeve has a hollow middle tube lumen, and the bottom opening of the middle tube lumen is provided with an inner tube limiting ring for limiting the movement distance of the inner sleeve; The outer periphery of the upper end of the middle sleeve is provided with two middle tube abutment rings protruding outward, and a middle tube installation groove is formed between the two middle tube abutment rings at a vertical interval. A middle tube wear-resistant ring is installed in the middle tube installation groove, and the middle tube wear-resistant ring is movably abutted against the inner side wall of the inner cavity of the outer tube; the middle tube abutment ring and the middle tube limiting ring are arranged vertically opposite to each other; The outer periphery of the upper end of the inner sleeve is provided with two inner tube abutment rings protruding outward, and an inner tube mounting groove is formed between the two inner tube abutment rings at a vertical relative interval. An inner tube wear-resistant ring is installed in the inner tube mounting groove, and the inner tube wear-resistant ring is movably abutted against the inner side wall of the inner cavity of the middle tube; the inner tube abutment ring and the inner tube limiting ring are arranged vertically relative to each other; The sliding sealing structures are respectively formed between the two middle tube abutting rings and the middle tube wear-resistant ring, and between the two inner tube abutting rings and the inner tube wear-resistant ring.

[0009] Furthermore, the middle tube abutment ring is located in the inner cavity of the outer tube, and the outer side wall of the middle tube abutment ring is spaced apart from the inner side wall of the outer tube inner cavity; the inner tube abutment ring is located in the inner cavity of the middle tube, and the outer side wall of the inner tube abutment ring is spaced apart from the inner side wall of the middle tube inner cavity.

[0010] Furthermore, the wire retractor is equipped with a torque sensor or a current detection device for real-time monitoring of the load torque of the driving wire rope or the working current of the motor; when the end of the hydraulic oil replacement pump contacts the liquid surface, causing the load to increase, the torque or current change signal is used to determine whether the liquid outlet has reached the liquid surface and control it to stop extending.

[0011] Furthermore, the motor of the wire retractor is an explosion-proof motor; the wire retractor includes a motor, a reel and a wire rope; the motor is connected to the reel through a motor shaft, one end of the wire rope is connected to the reel, and the other end of the wire rope is connected to the bottom of the inner sleeve.

[0012] Furthermore, the bottom of the outer sleeve and the bottom of the middle sleeve are both provided with a limiting structure, and the limiting structure includes a threaded barrel and a positioning pin for threaded connection with the outer sleeve or the middle sleeve, a threaded cavity communicating with the fluid channel is formed in the threaded barrel, and the bottom opening of the threaded cavity is provided with a bottom ring, and the bottom ring and the threaded barrel are an integrated structure, and the threaded barrel is connected to the outer sleeve or the middle sleeve by passing the positioning pin through the bottom ring; The bottom ring includes a bottom abutting ring for abutting against the bottom of the outer sleeve or the bottom of the middle sleeve and two middle sleeve limiting rings or two inner sleeve limiting rings. The bottom abutting ring and the middle sleeve limiting ring or the inner sleeve limiting ring are an integrated structure. A sealing area is formed between the two middle sleeve limiting rings or the two inner sleeve limiting rings. A sealing wear-resistant ring is installed in the sealing area. The sealing wear-resistant ring is in sliding abutment with the outer wall of the middle sleeve or the outer wall of the inner sleeve. The bottom abutment ring is provided with a plurality of threaded holes for the positioning pins to pass through; the tops of the middle tube limiting ring and the inner tube limiting ring are both provided with top buffer rings; the threaded barrel is threadedly connected to the outer sleeve or the middle sleeve through the threads in the threaded cavity, the outer side wall of the threaded barrel is arranged flush with the outer side wall of the outer sleeve or the outer side wall of the middle sleeve, and the outer side wall of the threaded barrel is provided with anti-slip grooves on the circumference.

[0013] Furthermore, a filtering structure is provided at the bottom of the pump body, and the filtering structure includes a hollow frame, the top of the hollow frame is rotatably connected to a connecting ring for being threadedly connected to the pump body, a plurality of bottom buffer rings are provided on the hollow frame for docking with the bottom of the suction pipe, and a plurality of suspended filter meshes are provided on the bottom buffer ring, the filter mesh is an arc-shaped structure, a bowl-shaped interception cavity is formed at the bottom of the filter mesh, the diameter of the filter mesh is smaller than the inner diameter of the suction pipe, a plurality of push rods are connected to the outside of the filter mesh, the plurality of push rods are arranged at intervals along the circumference of the outer side of the filter mesh, the push rods are arranged perpendicular to the filter mesh, the length of the push rods is greater than the length of the suction pipe, the bottom of the push rod passes through the bottom buffer ring and is horizontally bent away from the suction pipe to form a bottom-touching foot; When the filter structure needs to be installed on the pump body, first insert the filter mesh into the suction pipe, and then rotate the connecting ring to connect it with the pump body thread; When the pump body descends to the inner bottom of the train tank car, the bottom-contacting foot abuts against the inner bottom of the train tank car, so that the bottom-contacting foot pushes the filter mesh to move upward in the suction pipe through the pushing rod until the filter mesh rises to the pump cavity of the pump body. At this time, the outer side wall of the filter mesh and the top opening of the suction pipe are spaced to form a lateral suction area.

[0014] Compared with the prior art, the electric vertical pipe of the train underwater loading and unloading vehicle provided by the present invention is directly arranged at the outlet end of the inner casing through the hydraulic oil replacement pump, so that the liquid is sucked in and discharged from the bottom of the tank, ensuring that the entire loading and unloading process is carried out below the liquid surface, completely avoiding volatilization loss and oil and gas escape, and significantly reducing the risk of explosion and environmental pollution; the train sealing cap (including sealing ring) at the bottom end of the outer casing is sealed with the tank mouth; the sliding sealing structure between the outer casing, the middle casing and the inner casing double blocks the oil and gas leakage path and realizes multiple dynamic seals; the steel wire retractor drives the casing to retract and retract to realize automatic lifting of the vertical pipe, eliminating the risk of manual operation; the hydraulic oil replacement pump directly penetrates into the tank, eliminating the suction loss of traditional ground pumps and improving the conveying efficiency (especially for high viscosity or volatile media); the three-layer casing is nested and telescopic, and it shrinks when not working to reduce space occupancy; it extends to the bottom of the tank when working, adapts to tank trucks of different depths, and has a compact structure and strong adaptability; it solves the problems of low efficiency and safety risks of the vertical pipe of the loading and unloading vehicle in manual loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the electric drop pipe and the train tank car provided by the present invention; Figure 2 It is a front perspective schematic diagram of the electric drop tube provided by the present invention; Figure 3 This is a schematic diagram of the cross-sectional structure of the electric drop pipe provided by the present invention; Figure 4 This invention Figure 3 Schematic diagram of the enlarged structure of A; Figure 5 It is a schematic diagram of the cross-section structure of the outer sleeve or the middle sleeve and the limiting structure provided by the present invention; Figure 6 This is a schematic diagram of the cross-section structure of the hydraulic oil replacement pump and the filter structure provided by the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the cross-section structure of the hydraulic oil replacement pump and the filter structure provided by the present invention. Figure 2 ; Figure 8 It is a schematic diagram of the top structure of the filtering structure provided by the present invention.

[0016] In the figure: wire retractor 10, outer casing 20, middle casing 30, inner casing 40, train sealing cap 50, liquid inlet 60, hydraulic oil pump 70, hydraulic pipeline 80, limiting structure 90, wire rope 11, motor 12, reel 13, middle pipe limiting ring 21, pipe clamp 22, inner pipe limiting ring 31, middle pipe abutting ring 32, middle pipe wear-resistant ring 33, inner pipe abutting ring 41, inner pipe wear-resistant ring 42, hydraulic Motor 71, pump body 72, infusion tube 73, suction tube 74, filtering structure 75, hollow frame 751, connecting ring 752, bottom buffer ring 753, filter mesh 754, push rod 755, bottom contact foot 756, fixed tube 81, telescopic inner tube 82, threaded barrel 91, positioning pin 92, threaded cavity 93, bottom ring 94, bottom abutment ring 941, sealing wear-resistant ring 942, threaded hole 943. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0019] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "up", "down", "left", "right", etc. indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] Reference Figure 1-8 The figure shows a preferred embodiment of the present invention.

[0021] The electric drop pipe for a train underwater loading and unloading vehicle includes a wire retractor 10, a liquid inlet 60, an outer sleeve 20, a middle sleeve 30, an inner sleeve 40, a train sealing cap 50, a hydraulic oil displacement pump 70, and a hydraulic pipeline 80. The upper end of the outer sleeve 20 is connected to the liquid inlet 60, and the lower end of the outer sleeve 20 is connected to the train sealing cap 50. The bottom end of the train sealing cap 50 is provided with a sealing ring for sealingly connecting with the tank mouth of the train tank car; the middle sleeve 30 is sleeved inside the outer sleeve 20 and can move telescopically relative to the outer sleeve 20; the inner sleeve 40 is sleeved inside the middle sleeve 30 and can move telescopically relative to the middle sleeve 30. The outer sleeve 20, middle sleeve 30, and inner sleeve 40 are coaxially sleeved in sequence to form a retractable fluid channel; sliding sealing structures are provided between the outer sleeve 20 and the middle sleeve 30, and between the middle sleeve 30 and the inner sleeve 40. The wire retractor 10 is connected to the inner casing 40 through a wire rope 11, which is used to drive the extension and retraction of the middle casing 30 and the inner casing 40; the hydraulic oil replacement pump 70 is arranged at the outlet end of the inner casing 40, which is used to realize underwater loading and unloading; the hydraulic pipeline 80 is connected to the hydraulic oil replacement pump 70, which is used to provide hydraulic power to the hydraulic oil replacement pump 70.

[0022] The electric drop pipe for the train submerged loading and unloading vehicle, provided above, uses a hydraulic oil displacement pump 70 directly mounted at the outlet of the inner casing 40. This pump draws and discharges liquid from the tank bottom, ensuring that the entire loading and unloading process occurs below the liquid surface, completely avoiding volatilization losses and oil and gas escape, significantly reducing the risk of explosion and environmental pollution. A train sealing cap 50 (including a sealing ring) at the bottom of the outer casing 20 seals against the tank opening. The sliding sealing structure between the outer casing 20, the middle casing 30, and the inner casing 40 double-blocks oil and gas leakage paths, achieving multiple dynamic seals. A wire retractor 10 drives the casing to extend and retract, enabling automatic raising and lowering of the drop pipe, eliminating the risk of manual operation. The hydraulic oil displacement pump 70 penetrates directly into the tank, eliminating the suction loss of traditional surface pumps and improving delivery efficiency (especially for high-viscosity or volatile media). The three-layer casing is nested and retractable, retracting when not in operation to reduce space usage. When in operation, it extends to the tank bottom, adapting to tank trucks of varying depths. The compact structure offers strong adaptability and solves the problems of low efficiency and safety risks associated with manual loading of drop pipes for loading and unloading vehicles.

[0023] In this embodiment, the hydraulic oil replacement pump 70 includes a hydraulic motor 71, a pump body 72, and a fluid delivery pipe 73. The hydraulic motor 71 is connected to the top of the pump body 72. A plurality of suction pipes 74 are provided at the bottom of the pump body 72. The plurality of suction pipes 74 are arranged at intervals along the circumference of the bottom of the pump body 72. The pump body 72 is connected to the outlet end of the inner casing 40 through the fluid delivery pipe 73. Hydraulic pipelines 80 are respectively connected to both sides of the hydraulic motor 71 for providing hydraulic power to the hydraulic motor 71.

[0024] The infusion tube 73 is an inverted "Y"-shaped hollow tube. The liquids input from the two inlets of the infusion tube 73 are combined and then output from the outlet to the outlet end of the inner sleeve 40. The hydraulic motor 71 and the pump body 72 are integrated into a design to reduce power transmission loss; multiple circumferentially surrounding suction pipes 74 increase the suction area to avoid suction caused by an uneven tank bottom or residual liquid, ensuring continuous and stable operation; the infusion pipe 73 connects the pump body 72 and the inner sleeve 40, enabling quick disassembly and assembly of the pump body 72, making it easy to inspect or replace.

[0025] In this embodiment, the two hydraulic pipelines 80 are respectively an inlet pipe for supplying hydraulic pressure into the hydraulic motor 71 and an outlet pipe for supplying hydraulic pressure out of the hydraulic motor 71. The inlet pipe and the outlet pipe respectively pass through both sides of the train sealing cap 50 and are connected to both sides of the hydraulic motor 71 to provide hydraulic power to the hydraulic motor 71.

[0026] The liquid inlet pipe and the liquid outlet pipe pass through both sides of the train sealing cap 50 to connect to the hydraulic motor 71, preventing the pipeline from being entangled or worn during the extension and retraction process, while maintaining the integrity of the sealing cap; the symmetrically arranged hydraulic pipelines 80 balance the force on the hydraulic motor 71, reducing vibration and overloading risks.

[0027] In this embodiment, the hydraulic pipeline 80 includes a fixed tube 81 and a telescopic inner tube 82. The upper end of the fixed tube 81 extends along the height direction of the outer sleeve 20. The outer sleeve 20 is connected to the upper end of the fixed tube 81 through a tube clamp 22. The lower end of the fixed tube 81 passes through the train sealing cap 50 and is exposed below the train sealing cap 50. The telescopic inner tube 82 is inserted into the interior of the fixed tube 81 and can be telescopically moved relative to the fixed tube 81. The fixed tube 81 is connected to the hydraulic motor 71 through the telescopic inner tube 82.

[0028] The combined design of the fixed tube 81 and the telescopic inner tube 82 allows the length of the hydraulic pipeline 80 to be automatically adjusted as the casing expands and contracts, completely solving the problem of traditional rigid pipelines being prone to bending and rupture.

[0029] Integrated installation: The fixed tube 81 is bound to the outer sleeve 20 through the tube clamp 22, without the need for additional support structure, simplifying the equipment layout.

[0030] In this embodiment, the outer sleeve 20 has a hollow outer tube lumen, and the bottom opening of the outer tube lumen is provided with a middle tube limiting ring 21 for limiting the movement distance of the middle sleeve 30; the middle sleeve 30 has a hollow middle tube lumen, and the bottom opening of the middle tube lumen is provided with an inner tube limiting ring 31 for limiting the movement distance of the inner sleeve 40; Two middle tube abutment rings 32 are provided on the outer periphery of the upper end of the middle sleeve 30, protruding outward. A middle tube mounting groove is formed vertically between the two middle tube abutment rings 32. A middle tube wear-resistant ring 33 is installed in the middle tube mounting groove. The middle tube wear-resistant ring 33 movably abuts against the inner side wall of the inner cavity of the outer tube. The middle tube abutment ring 32 is vertically arranged opposite to the middle tube limit ring 21. Two inner tube abutment rings 41 are provided on the outer periphery of the upper end of the inner sleeve 40, protruding outward. An inner tube mounting groove is formed vertically between the two inner tube abutment rings 41. An inner tube wear-resistant ring 42 is installed in the inner tube mounting groove. The inner tube wear-resistant ring 42 movably abuts against the inner side wall of the inner cavity of the middle tube. The inner tube abutment ring 41 is vertically arranged opposite to the inner tube limit ring 31. A sliding sealing structure is formed between the two middle tube abutting rings 32 and the middle tube wear-resistant ring 33 , and between the two inner tube abutting rings 41 and the inner tube wear-resistant ring 42 .

[0031] Precision limit and wear-resistant guide: The middle tube limit ring 21 / inner tube limit ring 31 rigidly limits the travel of the sleeve (middle sleeve 30, inner sleeve 40); the middle tube wear-resistant ring 33 / inner tube wear-resistant ring 42 abuts against the pipe wall to prevent radial shaking of the sleeve, ensure coaxial expansion and contraction, and reduce wear of the sealing structure.

[0032] Replaceable wear-resistant design: Wear-resistant rings (middle tube wear-resistant ring 33, inner tube wear-resistant ring 42) are embedded in the mounting grooves (middle tube mounting groove, inner tube mounting groove) of the abutment rings. They can be replaced independently after wear, significantly reducing maintenance costs.

[0033] Strengthen the limiting function: the middle tube abutment ring 32 at the upper end of the middle sleeve 30 and the inner tube abutment ring 41 at the upper end of the inner sleeve 40 are arranged vertically relative to the limiting rings of the outer tube and the limiting rings of the middle tube respectively; when the sleeve is fully retracted, these abutment rings will contact the corresponding limiting rings to form a hard limit, which clearly prevents the sleeve from further retracting, protects the internal structure (such as the connection point of the wire rope 11) from impact or excessive extrusion, and improves the reliability and life of the equipment.

[0034] Providing force transmission points: the abutment rings (middle tube abutment ring 32 and inner tube abutment ring 41) provide stable support points for the sleeve in the retracted state.

[0035] In this embodiment, the middle tube abutment ring 32 is located in the inner cavity of the outer tube, and the outer side wall of the middle tube abutment ring 32 is spaced apart from the inner side wall of the outer tube inner cavity; the inner tube abutment ring 41 is located in the inner cavity of the middle tube, and the outer side wall of the inner tube abutment ring 41 is spaced apart from the inner side wall of the middle tube inner cavity.

[0036] Ensure smooth movement: Clearly define the gap between the outer wall of the abutment ring (middle tube abutment ring 32, inner tube abutment ring 41) and the inner wall of the tube cavity (outer tube inner cavity, middle tube inner cavity); this design avoids radial friction between the abutment ring and the tube wall, ensuring that the sleeve only bears axial force (from the wire rope 11 and the limit ring) during extension and retraction, resulting in low movement resistance, smoother and more stable operation, and reduced risk of jamming.

[0037] Reduce wear: avoid unnecessary radial friction wear.

[0038] In this embodiment, the wire retractor 10 is equipped with a torque sensor or a current detection device for real-time monitoring of the load torque of the driving wire rope 11 or the working current of the motor 12; when the end of the hydraulic oil replacement pump 70 contacts the liquid surface and causes the load to increase, the torque or current change signal is used to determine whether the liquid outlet has reached the liquid surface and control it to stop extending.

[0039] Intelligent liquid level detection and positioning: A torque sensor or current detection device monitors the load torque of the wire rope 11 or the current of the drive motor 12 in real time. When the hydraulic oil displacement pump 70 at the end of the inner casing 40 contacts the liquid surface, the resistance (load) suddenly increases, causing a significant increase in torque or current. Upon detecting this change, the system automatically determines that the hydraulic oil displacement pump 70 has reached the liquid surface and immediately controls the wire retractor 10 to stop extending.

[0040] Automatic and precise control of immersion depth: Ensures that the hydraulic oil displacement pump 70 stops at a position just touching the liquid surface or slightly below the liquid surface (according to the set logic), achieving optimal underwater loading effect (ensuring underwater liquid discharge while avoiding excessive insertion causing unnecessary resistance or equipment stress).

[0041] Improved automation and safety: Completely eliminates the need for manual observation and judgment of liquid levels, making operation more convenient, accurate, and safer. Prevents equipment overload damage or loosening of the wire rope due to excessive insertion.

[0042] In this embodiment, the motor 12 of the wire retractor 10 is an explosion-proof motor 12; the wire retractor 10 includes a motor 12, a reel 13 and a wire rope 11; the motor 12 is connected to the reel 13 through the motor 12 shaft, one end of the wire rope 11 is connected to the reel 13, and the other end of the wire rope 11 is connected to the bottom of the inner sleeve 40.

[0043] Improved intrinsic safety: When loading in flammable and explosive hazardous locations such as the petroleum and chemical industries, the use of explosion-proof motors 12 is mandatory. This design effectively prevents sparks and high temperatures generated during the operation of the motors 12 from igniting the surrounding explosive environment, greatly improving the intrinsic safety level of the equipment when used in hazardous areas and complying with safety regulations.

[0044] Ensuring operational safety: is the key foundation for the safe operation of the entire equipment.

[0045] Providing a reliable drive solution: The core structure of the wire retractor 10 is clarified: the motor 12 provides power, the drum 13 winds the wire rope 11, one end of the wire rope 11 is fixed to the drum 13, and the other end is connected to the bottom of the inner casing 40; this is the most direct, reliable and mature mechanical transmission method to achieve casing extension and retraction.

[0046] The force transmission path is clear: the steel wire rope 11 directly pulls the innermost casing (inner casing 40), and drives the middle casing (middle casing 30) to move through the inner casing 40, with a simple and efficient structure.

[0047] In this embodiment, the bottom of the outer sleeve 20 and the bottom of the middle sleeve 30 are both provided with a limiting structure 90. The limiting structure 90 includes a threaded barrel 91 and a positioning pin 92 for threaded connection with the outer sleeve 20 or the middle sleeve 30. A threaded cavity 93 communicating with the fluid channel is formed in the threaded barrel 91. The bottom opening of the threaded cavity 93 is provided with a bottom ring 94. The bottom ring 94 and the threaded barrel 91 are an integrated structure. The threaded barrel 91 is connected to the outer sleeve 20 or the middle sleeve 30 by passing the positioning pin 92 through the bottom ring 94. The bottom ring 94 includes a bottom abutting ring 941 for abutting the bottom of the outer sleeve 20 or the bottom of the middle sleeve 30, and two middle pipe limiting rings 21 or two inner pipe limiting rings 31. The bottom abutting ring 941 and the middle pipe limiting ring 21 or the inner pipe limiting ring 31 are an integrated structure. A sealing area is formed between the two middle pipe limiting rings 21 or the two inner pipe limiting rings 31. A sealing wear-resistant ring 942 is installed in the sealing area. The sealing wear-resistant ring 942 is in sliding abutment with the outer wall of the middle sleeve 30 or the outer wall of the inner sleeve 40. A plurality of threaded holes 943 for the positioning pins 92 to pass through are provided on the bottom abutment ring 941; top buffer rings are provided on the tops of the middle tube limiting ring 21 and the inner tube limiting ring 31; the threaded barrel 91 is threadedly connected to the outer sleeve 20 or the middle sleeve 30 through the threads in the threaded cavity 93, and the outer side wall of the threaded barrel 91 is arranged flush with the outer side wall of the outer sleeve 20 or the outer side wall of the middle sleeve 30, and the outer side wall of the threaded barrel 91 is provided with anti-slip grooves on the circumference.

[0048] The threaded connection facilitates disassembly and maintenance, saving 50% of operation time. The sealing wear-resistant ring 942 enhances the bottom sealing and prevents liquid leakage. The anti-slip design makes manual operation more labor-saving and improves work efficiency. The positioning pin 92 ensures the firmness of the connection. The top buffer ring effectively absorbs the impact force when the casing is extended and retracted. The sealing wear ring 942 forms a dynamic seal in the sealing area, taking into account both mechanical protection and leakage prevention.

[0049] The top of the hollow frame 751 is rotatably connected to a connecting ring 752 for threaded connection to the pump body 72. The hollow frame 751 is provided with a plurality of bottom buffer rings 753 for docking with the bottom of the suction pipe 74. The bottom buffer ring 753 is provided with a plurality of suspended filter meshes 754. The filter mesh 754 is an arc-shaped structure. The bottom of the filter mesh 754 forms a bowl-shaped interception cavity. The diameter of the filter mesh 754 is smaller than the inner diameter of the suction pipe 74. The outside of the filter mesh 754 is connected to a plurality of push rods 755. The plurality of push rods 755 are arranged at intervals along the circumference of the outer side of the filter mesh 754. The push rods 755 are arranged perpendicular to the filter mesh 754. The length of the push rods 755 is greater than the length of the suction pipe 74. The bottom of the push rod 755 passes through the bottom buffer ring 753 and is horizontally bent away from the suction pipe 74 to form a bottom contact foot 756. When the filter structure 75 needs to be installed on the pump body 72, first insert the filter mesh 754 into the suction pipe 74, and then screw the rotating connecting ring 752 to the pump body 72; When the pump body 72 descends to the inner bottom of the train tank car, the bottom contact foot 756 abuts against the inner bottom of the train tank car, so that the bottom contact foot 756 pushes the filter mesh 754 upward in the suction tube 74 through the push rod 755 until the filter mesh 754 rises to the pump chamber of the pump body 72. At this time, the outer wall of the filter mesh 754 and the top opening of the suction tube 74 are spaced apart to form a lateral suction area.

[0050] Through the rotational connection between the connecting ring 752 and the hollow frame 751, the hollow frame 751 can be in a stationary state during the process of the connecting ring 752 being threadedly connected to the pump body 72, which is convenient for the positioning and installation of the filter mesh 754. The suction tube 74 can be protected by the bottom buffer ring 753. The filter mesh 754 effectively intercepts impurities in the liquid with a filtration accuracy of 0.5mm; the bowl-shaped interception cavity design increases the filtration area and reduces the risk of clogging; the automatic adjustment function ensures that the filter mesh 754 is always in the best working position; the bottom contact foot 756 design ensures the accurate positioning of the filter structure 75; this structure enables the pump body 72 to automatically adjust when it approaches the bottom of the tank, protecting the safety of the pump body 72.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The electric vertical pipe of the train underwater loading and unloading vehicle is characterized by: The utility model comprises a steel wire retractor, a liquid inlet, an outer sleeve, a middle sleeve, an inner sleeve, a train sealing cap, a hydraulic oil displacement pump and a hydraulic pipeline. The upper end of the outer sleeve is connected to the liquid inlet, the lower end of the outer sleeve is connected to the train sealing cap, and the bottom end of the train sealing cap is provided with a sealing ring for sealingly connecting with the tank port of the train tank car; the middle sleeve is sleeved inside the outer sleeve and can be telescopically moved relative to the outer sleeve, the inner sleeve is sleeved inside the middle sleeve and can be telescopically moved relative to the middle sleeve, the outer sleeve, middle sleeve and inner sleeve are coaxially sleeved in sequence to form a telescopic fluid channel; a sliding sealing structure is provided between the outer sleeve and the middle sleeve, and between the middle sleeve and the inner sleeve respectively; The wire retractor is connected to the inner casing via a wire rope, and is used to drive the extension and retraction of the middle casing and the inner casing; the hydraulic oil replacement pump is arranged at the outlet end of the inner casing, and is used to realize underwater loading and unloading; the hydraulic pipeline is connected to the hydraulic oil replacement pump, and is used to provide hydraulic power to the hydraulic oil replacement pump.

2. The electric vertical pipe for underwater loading and unloading vehicles of trains as claimed in claim 1, characterized in that: The hydraulic oil replacement pump includes a hydraulic motor, a pump body, and a fluid infusion pipe. The hydraulic motor is connected to the top of the pump body. A plurality of fluid suction pipes are provided at the bottom of the pump body. The plurality of fluid suction pipes are arranged at intervals along the circumference of the bottom of the pump body. The pump body is connected to the outlet end of the inner casing through the fluid infusion pipe. The hydraulic pipelines are respectively connected to both sides of the hydraulic motor to provide hydraulic power to the hydraulic motor.

3. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 2, characterized in that: The two hydraulic pipelines are respectively an inlet pipe for supplying hydraulic pressure into the hydraulic motor and an outlet pipe for supplying hydraulic pressure out of the hydraulic motor. The inlet pipe and the outlet pipe respectively pass through both sides of the train sealing cap and are connected to both sides of the hydraulic motor to provide hydraulic power to the hydraulic motor.

4. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 3, characterized in that: The hydraulic pipeline includes a fixed tube and a telescopic inner tube. The upper end of the fixed tube extends along the height direction of the outer tube. The outer tube is connected to the upper end of the fixed tube by a tube clamp. The lower end of the fixed tube passes through the train sealing cap and is exposed below the train sealing cap. The telescopic inner tube is inserted into the interior of the fixed tube and can be telescopically moved relative to the fixed tube. The fixed tube is connected to the hydraulic motor through the telescopic inner tube.

5. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 4, characterized in that: The outer sleeve has a hollow outer tube lumen, and the bottom opening of the outer tube lumen is provided with a middle tube limiting ring for limiting the movement distance of the middle sleeve; the middle sleeve has a hollow middle tube lumen, and the bottom opening of the middle tube lumen is provided with an inner tube limiting ring for limiting the movement distance of the inner sleeve; The outer periphery of the upper end of the middle sleeve is provided with two middle tube abutment rings protruding outward, and a middle tube installation groove is formed between the two middle tube abutment rings at a vertical interval. A middle tube wear-resistant ring is installed in the middle tube installation groove, and the middle tube wear-resistant ring is movably abutted against the inner side wall of the inner cavity of the outer tube; the middle tube abutment ring and the middle tube limiting ring are arranged vertically opposite to each other; The outer periphery of the upper end of the inner sleeve is provided with two inner tube abutment rings protruding outward, and an inner tube mounting groove is formed between the two inner tube abutment rings at a vertical relative interval. An inner tube wear-resistant ring is installed in the inner tube mounting groove, and the inner tube wear-resistant ring is movably abutted against the inner side wall of the inner cavity of the middle tube; the inner tube abutment ring and the inner tube limiting ring are arranged vertically relative to each other; The sliding sealing structures are respectively formed between the two middle tube abutting rings and the middle tube wear-resistant ring, and between the two inner tube abutting rings and the inner tube wear-resistant ring.

6. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 5, characterized in that: The middle tube abutment ring is located in the inner cavity of the outer tube, and the outer side wall of the middle tube abutment ring is spaced apart from the inner side wall of the outer tube inner cavity; the inner tube abutment ring is located in the inner cavity of the middle tube, and the outer side wall of the inner tube abutment ring is spaced apart from the inner side wall of the middle tube inner cavity.

7. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 1, characterized in that: The wire retractor is equipped with a torque sensor or a current detection device for real-time monitoring of the load torque of the driving wire rope or the working current of the motor; when the end of the hydraulic oil displacement pump contacts the liquid surface, causing the load to increase, the torque or current change signal is used to determine whether the liquid outlet has reached the liquid surface and control it to stop extending.

8. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 7, characterized in that: The motor of the wire retractor is an explosion-proof motor; the wire retractor comprises a motor, a drum and a wire rope; the motor is connected to the drum through a motor shaft, one end of the wire rope is connected to the drum, and the other end of the wire rope is connected to the bottom of the inner casing.

9. The electric drop pipe for underwater loading and unloading vehicles of trains as claimed in claim 5, characterized in that: The bottom of the outer sleeve and the bottom of the middle sleeve are both provided with a limiting structure, and the limiting structure includes a threaded barrel and a positioning pin for threaded connection with the outer sleeve or the middle sleeve, a threaded cavity communicating with the fluid channel is formed in the threaded barrel, and the bottom opening of the threaded cavity is provided with a bottom ring, and the bottom ring and the threaded barrel are an integrated structure, and the threaded barrel is connected to the outer sleeve or the middle sleeve by passing the positioning pin through the bottom ring; The bottom ring includes a bottom abutting ring for abutting against the bottom of the outer sleeve or the bottom of the middle sleeve and two middle sleeve limiting rings or two inner sleeve limiting rings. The bottom abutting ring and the middle sleeve limiting ring or the inner sleeve limiting ring are an integrated structure. A sealing area is formed between the two middle sleeve limiting rings or the two inner sleeve limiting rings. A sealing wear-resistant ring is installed in the sealing area. The sealing wear-resistant ring is in sliding abutment with the outer wall of the middle sleeve or the outer wall of the inner sleeve. The bottom abutment ring is provided with a plurality of threaded holes for the positioning pins to pass through; the tops of the middle tube limiting ring and the inner tube limiting ring are both provided with top buffer rings; the threaded barrel is threadedly connected to the outer sleeve or the middle sleeve through the threads in the threaded cavity, the outer side wall of the threaded barrel is arranged flush with the outer side wall of the outer sleeve or the outer side wall of the middle sleeve, and the outer side wall of the threaded barrel is provided with anti-slip grooves on the circumference.

10. The electric drop pipe for a train underwater loading and unloading vehicle according to any one of claims 2 to 9, characterized in that: The bottom of the pump body is provided with a filtering structure, which includes a hollow frame, the top of the hollow frame is rotatably connected to a connecting ring for being threadedly connected to the pump body, a plurality of bottom buffer rings are provided on the hollow frame for docking with the bottom of the suction tube, and a plurality of suspended filter meshes are provided on the bottom buffer ring, the filter mesh is an arc-shaped structure, the bottom of the filter mesh forms a bowl-shaped interception cavity, the diameter of the filter mesh is smaller than the inner diameter of the suction tube, a plurality of push rods are connected to the outside of the filter mesh, the plurality of push rods are arranged at intervals along the circumference of the outer side of the filter mesh, the push rods are arranged perpendicular to the filter mesh, the length of the push rod is greater than the length of the suction tube, the bottom of the push rod passes through the bottom buffer ring and is horizontally bent away from the suction tube to form a bottom-touching foot; When the filter structure needs to be installed on the pump body, first insert the filter mesh into the suction pipe, and then rotate the connecting ring to connect it with the pump body thread; When the pump body descends to the inner bottom of the train tank car, the bottom-contacting foot abuts against the inner bottom of the train tank car, so that the bottom-contacting foot pushes the filter mesh to move upward in the suction pipe through the pushing rod until the filter mesh rises to the pump cavity of the pump body. At this time, the outer side wall of the filter mesh and the top opening of the suction pipe are spaced to form a lateral suction area.

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