Double-pipe type wharf grain suction equipment

Abstract

A dual-tube grain suction equipment for wharves, relating to the field of pneumatic grain conveying, includes a support system and two suction units. The suction units are symmetrically arranged on the support system, and each suction unit can operate independently or collaboratively with other suction units. Each suction unit includes an unloading dust removal device, a wind source device, a grain discharge component, a suction component, and a control system. The suction and discharge components are connected to the inlet and outlet ends of the unloading dust removal device, respectively. The suction components can rotate relative to the support system and are equipped with limit devices connected to the control system. These limit devices ensure that the suction components maintain a safe distance from adjacent suction components or other equipment when their position changes. This dual-tube wharf grain suction equipment, with two suction units symmetrically and parallelly installed on a single support system, has a small space occupancy, increasing the loading and unloading capacity of a single wharf berth. Furthermore, it effectively controls the safe distance during operation, resulting in high safety performance.

Description

Technical Field

[0001] This invention relates to the field of pneumatic grain conveying, and more particularly to a dual-pipe type wharf grain suction device. Background Technology

[0002] A grain suction machine is a type of dock machinery used for unloading bulk grain from ships. In my country's inland waterway small and medium-sized docks (200-1000t / berth), the main unloading devices used are pneumatic grain suction machines and cranes. Grain suction machines utilize the principle of gas flow, conveying grain by allowing it to move with the gas. They offer advantages such as low equipment investment, clean unloading, and no residue. However, ordinary pneumatic grain suction machines, when handling large volumes up to 300t / h, experience a rapid decline in output, high energy consumption, excessive grain breakage, and rapid component wear and failure, failing to meet the loading and unloading capacity requirements of small and medium-sized inland waterway docks.

[0003] CN222770268U discloses an integrated grain conveying and unloading device, comprising: a frame, a fan, a suction pipe, a discharge pipe, a rotary platform, a rotary mechanism, a control room, and a dust removal device; the suction pipe and the discharge pipe are respectively arranged on both sides of the dust removal device; the suction pipe is connected to the feed end of the dust removal device through an adjusting device, and the horizontal rotation and pitch angle of the suction pipe can be controlled by the adjusting device; the discharge pipe is connected to the discharge end of the dust removal device; the rotary platform is mounted on the frame through the rotary mechanism, and can rotate through the rotary mechanism; the rotation of the rotary platform can drive the discharge pipe and the suction pipe to rotate.

[0004] CN220886204U discloses a pneumatic and boom-based grain cleaning device, including a cleaning system, a grain collection system, a control system, and a walking system. The grain collection system is mounted on the walking system and includes a dust removal mechanism, a negative pressure fan connected to the dust removal mechanism via pipes, and a separation mechanism. The separation mechanism is also equipped with a first grain suction pipe. The cleaning system is rotatably connected to the grain collection system and includes several articulated boom assemblies and a second grain suction pipe. The end of each boom assembly is equipped with a suction nozzle and a camera device that communicate with the second grain suction pipe. The second grain suction pipe is also connected to the first grain suction pipe.

[0005] As can be seen from the above, the suction pipes of existing grain conveying equipment used at wharves can rotate relative to the frame to achieve the clearing operation of materials inside the ship. However, the berth space of small and medium-sized inland river wharves is limited, but their loading and unloading capacity demand is increasing year by year. How to increase the loading and unloading capacity of grain conveying equipment in berths with limited space is a problem that the market urgently needs to solve and has great market value. Secondly, how to meet the safety requirements of wharf machinery and equipment. Therefore, it is urgent to develop a grain suction equipment for wharves that meets the requirements of high capacity and high safety performance to solve the grain loading and unloading problem of small and medium-sized inland river wharves. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a dual-pipe type wharf grain suction equipment with simple structure, large loading and unloading capacity and high safety performance. This invention achieves the high loading and unloading capacity requirements of small and medium-sized inland river wharves by specifically designing and arranging existing grain suction machines so that multiple grain suction units are symmetrically set on a wharf berth. By using existing grain suction equipment to meet the high loading and unloading capacity requirements of small and medium-sized inland river wharves, and by using a limiting device to control the working space distance of the grain suction units, the position / angle of the rotation of the grain suction pipelines of multiple grain suction equipment can be precisely controlled, so as to meet the requirements of safety and high capacity during grain loading and unloading.

[0007] The technical solution adopted by this invention to solve its technical problem is: A dual-tube wharf grain suction device includes a support system and two suction units. The suction units are symmetrically arranged on the support system, and each suction unit can operate independently or in conjunction with other suction units. The grain suction unit includes an unloading dust removal device, an air source device, a grain discharge component, a grain suction component, and a control system. The air source device is connected to the unloading dust removal device and is located between the grain discharge component and the grain suction component. The grain suction component and the grain discharge component are respectively connected to the feed end and discharge end of the unloading dust removal device, and the grain suction component can rotate relative to the support system. The grain suction component is equipped with a limit device connected to the control system. The limit device ensures that the grain suction component always maintains a safe distance from adjacent grain suction components or other equipment when its position changes (the safe distance for general dock machinery and equipment is more than 5m).

[0008] Preferably, the dual-tube wharf grain suction equipment refers to two sets of grain suction units installed in parallel and symmetrically on a wharf support frame. Each grain suction unit can operate independently or simultaneously and collaboratively, thereby making efficient use of berth space in small and medium-sized inland waterways and significantly increasing the loading and unloading capacity of a single berth.

[0009] In one exemplary embodiment, the grain suction assembly includes: a horizontal telescopic pipe, a rectangular bend, a ball joint, and a vertical feed pipe. One end of the rectangular bend is connected to the horizontal telescopic pipe, and the other end is connected to the vertical feed pipe via the ball joint. The lower end of the vertical feed pipe is provided with a suction nozzle. The limiting device includes a diffuse reflection controller disposed at one end of the horizontal telescopic pipe near the vertical feed pipe, and / or an angle encoding controller. The angle encoding controller is disposed on a slewing bearing device, which is disposed at the other end of the horizontal telescopic pipe and drives the grain suction assembly to rotate horizontally.

[0010] It should be noted that by installing a diffuse reflection controller as a limiting device at one end of the horizontal telescopic pipe near the vertical material pipe, it can be ensured that the ends of the horizontal telescopic pipes of adjacent grain suction equipment always maintain the safe distance required by the dock machinery. Simultaneously, the angle coding controller and other limiting devices at the other end can further lock the rotation angle of the horizontal telescopic pipes of adjacent grain suction units, especially double-pipe type dock grain suction equipment installed on the same support frame, achieving interlocking between the rotation angles of the horizontal telescopic pipes during operation, thus doubly guaranteeing the operational safety of the equipment. The cooperation between the ball joint and the vertical material pipe ensures that the vertical material pipe remains vertically downward during pitch adjustment, guaranteeing stable material transmission under changes in direction and height. The suction nozzle design at the end of the vertical material pipe effectively enhances the material intake and discharge capacity, improving the stability and efficiency of the conveying process.

[0011] Preferably, the distance between the diffuse reflection controllers on the horizontal telescopic pipes of adjacent grain suction units is greater than or equal to 5m, or the sum of the rotation angles of the horizontal telescopic pipes controlled by the angle encoding controllers of adjacent grain suction units is ≤180°. These two limiting devices can limit independently or in concert. That is, when the diffuse reflection controller detects that the distance between the horizontal telescopic pipes of adjacent grain suction units reaches the set safe distance value, such as 5m, the control systems of the two grain suction units will interlock the rotary drive device. When the angle encoding controllers of adjacent grain suction units detect that the sum of the rotation angles of the horizontal telescopic pipes driven by the rotary drive device reaches 180° (as shown in the attached figure), the control system will interlock the rotary drive device. Figure 4 and Figure 7 If θ1+θ2=180°, the control system will interlock the rotary drive device to avoid collisions and other safety accidents in the horizontal telescopic pipelines of adjacent grain suction units during operation, thereby improving the safety performance of the equipment.

[0012] The support system is a fixed support frame or a movable support frame, wherein the movable support frame is preferably a track-type movable support frame or a wheeled movable support frame.

[0013] One end of the slewing bearing device is connected to the end of the horizontal telescopic pipeline away from the vertical material pipe via a universal joint and a connecting bend, while the other end is connected to the unloading and dust removal device of the grain suction equipment. The horizontal telescopic pipeline can rotate horizontally as the slewing bearing device rotates.

[0014] The slewing bearing device includes a mounting base for connecting the slewing bearing device and the unloading dust removal device, a slewing mechanism mounted on the mounting base, and a slewing drive device. The slewing mechanism includes an inner ring and an outer ring that are rotatably fitted together. The inner ring is fixed on the mounting base, and the telescopic beam arm on the horizontal telescopic pipe of the grain suction assembly is fixed on the outer ring. The slewing drive device drives the outer ring of the slewing mechanism to rotate around the inner ring and causes the horizontal telescopic pipe fixed on the outer ring to rotate in the horizontal direction to change the grain suction area of ​​the grain suction assembly.

[0015] During the grain suction process, the rotary drive device drives the outer ring of the rotary mechanism to rotate, thereby causing the horizontal telescopic pipe fixed on the outer ring of the rotary mechanism to rotate in the horizontal direction, continuously changing the grain suction area of ​​the grain suction assembly. This allows materials located in different compartments and different areas to be sucked in through the suction nozzle, then enter the unloading dust removal device for dust removal, and then enter the subsequent grain discharge assembly. This further expands the grain suction operation range of the grain suction assembly and avoids the phenomenon that the grain suction assembly is limited in its grain suction area when operating in a fixed position.

[0016] Optionally, the outer and inner rings of the rotary mechanism are rotated together via gear transmission or rolling element transmission.

[0017] In this application, the slewing mechanism is a slewing bearing. The slewing bearing can withstand large axial and radial loads, ensuring a firm connection between the grain suction assembly and the mounting base. At the same time, the rolling elements within the slewing bearing make the rotation of the grain suction assembly very smooth.

[0018] It should be noted that, compared to the integrated grain conveying equipment for suction and unloading disclosed in CN222770268U, whose slewing bearing device can drive the entire grain suction equipment to rotate, the slewing bearing device of this invention only drives the grain suction component to rotate horizontally, effectively reducing the space occupancy rate during the operation of the grain suction equipment, and better meeting the needs of small berths in inland waterways.

[0019] The horizontal telescopic pipeline is equipped with an adjustment device for adjusting the pitch angle and telescopic length of the horizontal telescopic pipeline.

[0020] It should be noted that the adjustment device enables precise control of the pitch angle and extension length of the suction pipe, allowing the equipment to quickly adjust to the optimal suction posture when facing material piles at different angles inside the ship at different hydrological heights, thus enhancing the adaptability and flexibility of the equipment.

[0021] The adjustment device includes a pitch drive device, a telescopic beam arm, and a telescopic drive mechanism. One end of the telescopic beam arm is rotatably mounted on a slewing bearing device via a universal joint, and the other end is connected to the pitch drive device via a steel wire rope. The fixed end of the pitch drive device is mounted on the unloading and dust removal device of the grain suction equipment. The telescopic drive mechanism is located at the end of the telescopic beam arm away from the vertical material pipe. A horizontal telescopic pipeline is mounted on the telescopic beam arm and includes a fixed pipe and a movable pipe. The movable pipe is fitted inside the fixed pipe. The other end of the fixed pipe is connected to the unloading and dust removal device via a connecting bend and a universal joint. The telescopic drive mechanism drives the telescopic beam arm to extend and retract, thereby causing the movable pipe of the horizontal telescopic pipeline to move horizontally along the fixed pipe, thus changing the total length of the horizontal telescopic pipeline.

[0022] It should be noted that the pitch drive device of the present invention uses multiple sets of pulleys, wire ropes, a winch, and a control unit to achieve the pitch of the telescopic beam arm. The pulleys include a first pulley fixedly connected to the telescopic beam arm and a second pulley fixed to the unloading and dust removal device. The wire rope is threaded between the first and second pulleys and is extended and retracted by the winch. According to actual requirements, the pitch drive device can drive the horizontal telescopic pipeline to rotate between 15° below the horizontal line and 45° above the horizontal line. That is, the pitch angle of the horizontal telescopic pipeline driven by the pitch drive device is generally controlled between -15° and +45°, thus ensuring that the suction nozzle is fully on shore when not in operation. During operation, the lifting and extension of the telescopic beam arm to its maximum position ensures that the vertical suction nozzle can enter and exit the hold when the ship is empty, and the suction nozzle can basically cover the entire hold space. The telescopic drive mechanism is installed at the root of the telescopic beam arm and is driven by a brake reduction motor through a safety coupling and a traction steel rope. To prevent slippage due to exceeding the set traction load, a set of contactless limit switches is also installed to limit the horizontal extension at the extreme position. The tensioning pulley of the traction wire rope is installed at the top of the telescopic beam arm, and the tension is adjusted by a screw.

[0023] The adjustment device can also adopt similar technologies disclosed in existing technologies CN201821055361.6 or CN202322336692.4, which are grain suction pipes and grain suction machines. In these technologies, the cooperation between the pitch drive mechanism and the telescopic beam arm not only realizes the pitch movement of the grain suction component, but also allows the length of the telescopic beam arm to be adjusted by the wire rope drive traction of the telescopic beam arm, thereby controlling the length of the horizontal telescopic pipeline and further improving the accuracy and stability of the material suction process.

[0024] Preferably, the control system is a PLC control system, which is electrically connected to the limit device, slewing bearing device, adjusting device, and the fan and dust removal device of the grain suction equipment. The control system is located in the driver's cab equipped with an air conditioner, on the side of the beam arm of the grain suction unit, allowing for complete control of the entire machine. The control system controls the grain suction units according to the actual operating requirements of the equipment, based on their respective operating directions, and also has a module for coordinating the operation of two grain suction units. Additionally, a handheld wireless remote control with an effective range of 100 meters is provided, capable of controlling the pitch, horizontal extension, and slewing angles of the telescopic beam arm and horizontal telescopic pipe of the grain suction assembly.

[0025] It should be noted that the PLC control system, as the core control unit, realizes integrated management and automated control of the main components of the dual-pipe wharf grain suction equipment, including the fan, slewing mechanism, regulating device and dust removal device. This greatly improves the intelligence level of the equipment, allowing operators to set parameters, monitor working status and make remote adjustments through the human-machine interface. The integrated control system simplifies the operation process, reduces the skill requirements of operators, reduces human error, and makes the equipment operation safer and more economical.

[0026] The air source device uses a Roots vacuum pump, which can more easily and efficiently obtain higher air pressure than a centrifugal fan. The volumetric flow rate fluctuates less with resistance changes, thus achieving steady-state delivery with high suction lift and high concentration. The Roots vacuum pump is equipped with an inlet silencer and an exhaust silencer at the inlet and outlet ends, respectively, thereby reducing energy loss caused by noise reduction resistance in the grain suction unit.

[0027] The unloading dust removal device includes an unloading dust collector, an airlock, and a reverse pulse dust collector. The top of the unloading dust collector is equipped with a filter assembly, which consists of a filter bag, a filter frame, and a pulse guide ring. The pulse guide ring is connected to the reverse pulse dust collector. The airlock is located at the bottom of the unloading dust collector and above the feed end of the grain discharge assembly.

[0028] The grain discharge assembly includes a conveyor and a discharge chute. The inlet end of the conveyor is connected to the outlet end of the airlock, and the other end is connected to the vertically arranged discharge chute, which is connected to the silo.

[0029] The beneficial effects of the dual-tube type grain suction device at the wharf of the present invention are as follows: This dual-tube wharf grain suction equipment breaks through the upper limit of the loading and unloading capacity of conventional pneumatic conveying grain suction machines by symmetrically and parallelly installing two sets of grain suction units on a support system, thereby increasing the loading and unloading capacity of grain suction equipment at a single wharf berth. The grain suction unit only rotates its grain suction components relative to the support system, and by symmetrically arranging the grain suction units, the required operating space during operation is significantly reduced, improving the operational safety and space utilization of the equipment.

[0030] Secondly, by setting a limit device on the grain suction component of the grain suction unit, the safe distance during the operation of the grain suction equipment can be effectively controlled, thereby meeting the safety performance requirements of the terminal machinery and equipment, and also meeting the requirement of installing two sets of grain suction units on the same berth in small and medium-sized inland waterways to meet the requirements of large loading and unloading volumes.

[0031] In addition, the grain suction unit of this grain suction equipment can operate independently or in coordination, which not only meets the demand for high loading and unloading capacity, but also facilitates the inspection and maintenance of the grain suction unit. Attached Figure Description

[0032] Figure 1 This is a front view of a double-tube wharf grain suction device according to Embodiment 1 of the present invention.

[0033] Figure 2 This is an enlarged schematic diagram of the grain suction component in a dual-tube wharf grain suction device according to Embodiment 1 of the present invention.

[0034] Figure 3 This is a side view of a double-tube wharf grain suction device according to Embodiment 1 of the present invention.

[0035] Figure 4 This is a top view of a double-tube wharf grain suction device according to Embodiment 1 of the present invention.

[0036] Figure 5 This is a diagram showing the changing usage status of a dual-tube wharf grain suction device according to Embodiment 1 of the present invention; A. Raise the right suction pipe and move the left suction pipe to the left; B. Raise the left suction pipe and move the right suction pipe to the right; Figure 6 This is a front view of a dual-tube wharf grain suction device according to Embodiment 2 of the present invention; Figure 7 This is an enlarged schematic diagram of the grain suction component in a dual-tube wharf grain suction device according to Embodiment 2 of the present invention.

[0037] Figure 8 This is a top view of a double-tube wharf grain suction device according to Embodiment 2 of the present invention; Figure 9 This is an enlarged schematic diagram of the grain suction component in a dual-tube wharf grain suction device according to Embodiment 3 of the present invention.

[0038] In the diagram: 1. Suction nozzle; 2. Vertical feed tube; 3. Ball joint; 4. Rectangular bend; 5. Diffuse reflection controller; 6. Movable tube; 7. Telescopic beam arm; 8. Fixed tube; 9. Wire rope; 10. Telescopic drive mechanism; 11. Connecting bend; 12. Grain suction unit; 13. Universal tube hinge; 14. Slewing bearing device; 141. Mounting base; 142. Slewing mechanism; 143. Slewing drive device; 15. Unloading and dust removal device; 16. Support system; 161. Fixed support frame; 162. Rail-mounted mobile support frame; 17. Control center; 18. Pitch drive device; 19. Grain discharge assembly; 20. Airlock; 21. Cabin; 22. Bin; 23. Angle encoder controller.

[0039] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1 like Figures 1-4 As shown, a dual-tube wharf grain suction device includes: a support system and two sets of grain suction units 12. The grain suction units 12 are arranged in parallel and symmetrical arrangement (e.g., the grain suction units 12 are arranged in parallel and symmetrical arrangement with a center-to-center distance of 3.5m) on the support system, and each set of grain suction units 12 can operate independently or in coordination with other grain suction units 12. The grain suction unit 12 includes a unloading dust removal device 15, a wind source device, a grain discharge component 19, a grain suction component, and a control system 17. The wind source device is connected to the unloading dust removal device 15 and is located between the grain discharge component 19 and the grain suction component. The grain suction component and the grain discharge component 19 are respectively connected to the feed end and the discharge end of the unloading dust removal device 15, and the grain suction component can rotate relative to the support system. The grain suction component is equipped with a limiting device connected to the control system 17. The limiting device ensures that the grain suction component always maintains a safe distance from adjacent grain suction components or other equipment when its position changes (the safe distance for general dock machinery and equipment is more than 5m).

[0042] This embodiment describes a dual-pipe type wharf grain suction device with a designed output of 400 t / h (the designed output of the two independent grain suction units 12 is 200 t / h), and a material bulk density of 0.75 t / m³. 3The work area is designed with reference to a 1000-ton ship type (e.g., 63m long, 13m wide, and 3.3m draft), and the wharf water level is 3m below the wharf surface.

[0043] like Figure 2 As shown, the grain suction assembly includes: a horizontal telescopic pipe, a rectangular bend 4, a ball joint 3, and a vertical feed pipe 2. One end of the rectangular bend 4 is connected to the horizontal telescopic pipe, and the other end is connected to the vertical feed pipe 2 through the ball joint 3. The lower end of the vertical feed pipe 2 is provided with a suction nozzle 1. The limiting device includes a diffuse reflection controller 5 disposed at one end of the horizontal telescopic pipe near the vertical feed pipe 2.

[0044] It should be noted that by setting a diffuse reflection controller 5 as a limiting device at the end of the horizontal telescopic pipe of the grain suction unit 12 near the vertical material pipe 2, it can be ensured that the ends of the horizontal telescopic pipes of adjacent grain suction equipment always maintain a safe distance above that required by the dock machinery equipment; by using the cooperation of the ball joint 3 and the vertical material pipe 2, the vertical material pipe 2 can always be kept vertically downward when the suction pipe is adjusted, ensuring the smooth transmission of materials under different directions and height changes. The design of the suction nozzle 1 at the end of the vertical material pipe 2 effectively enhances the material suction and discharge capacity, and improves the stability and efficiency of the conveying process.

[0045] The distance between the diffuse reflection controllers 5 on the horizontal telescopic pipelines of adjacent grain suction units 12 is greater than or equal to 5m.

[0046] The support system 16 is a fixed support frame 161. In this embodiment, the fixed support frame 161 is used to support the grain suction equipment with corresponding production capacity.

[0047] One end of the slewing bearing device 14 is connected to the end of the horizontal telescopic pipeline away from the vertical material pipe 2 via a universal joint 13 and a connecting bend 11, and the other end is connected to the unloading and dust removal device 15 of the grain suction equipment. The horizontal telescopic pipeline can rotate horizontally as the slewing bearing device 14 rotates.

[0048] The slewing bearing device 14 includes a mounting base 141 for connecting the slewing bearing device 14 to the unloading and dust removal device 15, a slewing mechanism 142 mounted on the mounting base 141, and a slewing drive device 143. The slewing mechanism 142 includes an inner ring and an outer ring that are rotatably engaged. The inner ring is fixed on the mounting base 141, and the telescopic beam arm 7 on the horizontal telescopic pipe of the grain suction assembly is fixed on the outer ring. The slewing drive device 143 drives the outer ring of the slewing mechanism 142 to rotate around the inner ring and causes the horizontal telescopic pipe fixed on the outer ring to rotate in the horizontal direction to change the grain suction area of ​​the grain suction assembly.

[0049] During the grain suction process, the rotary drive device 143 drives the outer ring of the rotary mechanism 142 to rotate, thereby causing the horizontal telescopic pipe fixed on the outer ring of the rotary mechanism 142 to rotate in the horizontal direction, continuously changing the grain suction area of ​​the grain suction assembly, so that materials located in different areas of different cabins 21 can be sucked in through the suction nozzle 1, and then enter the unloading dust removal device 15 for dust removal before entering the subsequent grain discharge assembly 19, further expanding the grain suction operation range of the grain suction assembly, and avoiding the phenomenon that the grain suction assembly is limited in its grain suction area when operating in a fixed position.

[0050] The outer and inner rings of the rotary mechanism 142 are rotated together by gear transmission or rolling element transmission.

[0051] In this embodiment, the slewing mechanism 142 is a slewing bearing. The slewing bearing can withstand large axial and radial loads, making the connection between the grain suction assembly and the mounting base 141 firm. At the same time, the rolling elements in the slewing bearing make the rotation of the grain suction assembly very smooth.

[0052] The horizontal telescopic pipeline is equipped with an adjustment device for adjusting the pitch angle and telescopic length of the pipeline. This adjustment device enables precise control of the pitch angle and telescopic length of the suction pipeline, allowing the equipment to quickly adjust to the optimal suction posture when facing material piles at different angles inside the ship at different hydrological heights, thus enhancing the adaptability and flexibility of the equipment.

[0053] The adjustment device includes a pitch drive device 18, a telescopic beam arm 7, and a telescopic drive mechanism 10. One end of the telescopic beam arm 7 is rotatably mounted on a slewing bearing device 14 via a universal joint 13, and the other end is connected to the pitch drive device 18 via a steel wire rope 9. The fixed end of the pitch drive device 18 is mounted on the unloading dust removal device 15 of the grain suction equipment. The telescopic drive mechanism 10 is provided at the end of the telescopic beam arm 7 away from the vertical material pipe 2. A horizontal telescopic pipeline is mounted on the telescopic beam arm 7. The horizontal telescopic pipeline includes a fixed pipe 8 and a movable pipe 6. The movable pipe 6 is sleeved inside the fixed pipe 8. The other end of the fixed pipe 8 is connected to the unloading dust removal device 15 via a connecting bend 11 and a universal joint 13. The telescopic drive mechanism 10 drives the telescopic beam arm 7 to extend and retract, thereby driving the movable pipe 6 of the horizontal telescopic pipeline to move horizontally along the fixed pipe 8 and changing the total length of the horizontal telescopic pipeline.

[0054] In this embodiment, the pitch drive device 18 uses multiple sets of pulleys, wire ropes 9, a winch, and a control unit to achieve the pitch of the telescopic beam arm 7. The pulleys include a first pulley fixedly connected to the telescopic beam arm 7 and a second pulley fixed to the unloading and dust removal device 15. The wire rope 9 passes between the first and second pulleys and is extended and retracted by the winch. According to actual requirements, the pitch drive device 18 can drive the horizontal telescopic pipeline to rotate between a 15° downward tilt and a 45° upward tilt. That is, the pitch angle of the horizontal telescopic pipeline driven by the pitch drive device 18 is generally controlled between -15° and +45°, thus ensuring that the suction nozzle 1 is fully ashore when not in operation, and that the vertical suction nozzle 1 can enter and exit the hold when the ship is empty, and that the suction nozzle 1 can basically cover the entire hold space, through the raising and extension of the telescopic beam arm 7 to its maximum position during operation. The telescopic drive mechanism 10 is installed at the base of the telescopic beam arm 7 and is driven by a brake reduction motor through a safety coupling and a traction steel rope. To prevent slippage due to exceeding the set traction load, a set of contactless limit switches is also provided to limit the horizontal telescopic movement at its extreme position. The tensioning guide pulley of the traction wire rope 9 is mounted at the top of the telescopic beam arm 7, and the tension is adjusted by a screw. The coordination between the pitch drive mechanism of the adjustment device and the telescopic beam arm 7 not only realizes the pitch movement of the grain suction assembly but also allows for the adjustment of the length of the telescopic beam arm 7 via the traction driven by the wire rope 9, thereby controlling the length of the horizontal telescopic pipeline and further improving the accuracy and stability during the material suction process.

[0055] The telescopic beam arm 7 is a load-bearing structural component of the horizontal telescopic pipeline-luffing system. The mechanical properties of the space truss structure are designed according to the port crane boom specifications. The root of the telescopic beam arm 7 is coaxially hinged to the slewing bearing device 14 with the universal joint 13 that connects to the horizontal telescopic pipeline.

[0056] The control system 17 is a PLC control system 17, which is electrically connected to the limit device, slewing bearing device 14, adjustment device, and the fan and dust removal device of the grain suction equipment. The control system 17 is located in the driver's cab equipped with an air conditioner, on the side of the beam arm on the grain suction unit 12, where it can implement full control of the entire machine. The control system 17 controls the grain suction unit 12 according to the actual operating needs of the equipment, based on the direction of operation, and also has an operation module that coordinates the operation of two grain suction units 12. In addition, it is equipped with a handheld wireless remote control with an effective range of 100 meters, which can control the pitch, horizontal extension, and slewing angles of the telescopic beam arm 7 and the horizontal telescopic pipe of the grain suction assembly.

[0057] The air source device uses a Roots vacuum pump, which can more easily and efficiently obtain higher air pressure than a centrifugal fan. The volumetric flow rate fluctuates less with changes in resistance, thus achieving steady-state delivery with high suction lift and high concentration. The Roots vacuum pump is equipped with an intake silencer and an exhaust silencer at the inlet and outlet ends, respectively, thereby reducing energy loss caused by noise reduction resistance in the grain suction unit 12.

[0058] The unloading dust removal device 15 includes an unloading dust collector, an airlock 20, and a reverse pulse dust collector. The top of the unloading dust collector is equipped with a filter assembly, which consists of a filter bag, a filter frame, and a pulse-jet guide ring. The pulse-jet guide ring is connected to the reverse pulse dust collector. In this embodiment, the airlock 20 has a capacity of 220 L / r (liters / revolution), a split-shell design for easy release of trapped foreign objects, an 8-blade impeller, and is made of wear-resistant cast iron. Near the airlock 20 are also a manual power-off switch, a discharge gate for retained materials in case of malfunction, and a feed inlet.

[0059] The grain discharge assembly 19 includes a conveyor and a discharge chute. The inlet end of the conveyor is connected to the outlet end of the airlock 20, and the other end is connected to the vertically arranged discharge chute, which is connected to the silo 22. The capacity of the conveyor is adapted to the capacity of a single grain suction unit 12, such as 200t / h.

[0060] It should be noted that the ball joint 3 has a 45° inward rotation and a 25° outward rotation degree of freedom. Therefore, when the horizontal telescopic pipe is tilted, the vertical feed pipe 2 will automatically remain vertical. The ball joint 3, which allows the vertical feed pipe 2 to swing left and right, is located between the rectangular bend 4 and the horizontal telescopic pipe. Therefore, the vertical feed pipe 2 can swing freely 90° to the left and right around the axis of the horizontal telescopic pipe. This function is useful when the grain suction assembly is docked for maintenance. Due to the presence of the ball joint 3 and the universal joint 13, the vertical feed pipe 2 can actually swing freely in any direction. This function is useful during clean tank suction and transport.

[0061] Example 2 See Figure 6-8 Compared with Example 1, the dual-tube wharf grain suction device of this embodiment has the following differences: This embodiment describes a dual-pipe type wharf grain suction device with a designed output of 600 t / h (the designed output of the two independent grain suction units 12 is 300 t / h), and a material bulk density of 0.75 t / m³. 3 The working area is designed with reference to the DWT35000 river and sea vessel type (length 190m, width 30.4m, depth 15.8m, draft 11.2m).

[0062] The limiting device is an angle encoder controller 23; the angle encoder controller 23 is installed on the slewing bearing device 14 at the other end of the horizontal telescopic pipe and drives the grain suction assembly to rotate horizontally. One end of the slewing bearing device 14 is connected to the end of the horizontal telescopic pipe away from the vertical material pipe 2 through a universal joint 13 and a connecting bend 11, and the other end is connected to the dust removal device of the grain suction equipment.

[0063] The slewing bearing device 14 includes a mounting base 141 for connecting the slewing bearing device 14 to the unloading and dust removal device 15, a slewing mechanism 142 mounted on the mounting base 141, and a slewing drive device 143. The slewing mechanism 142 includes an inner ring and an outer ring that are rotatably engaged. The inner ring is fixed on the mounting base 141, and the telescopic beam arm 7 on the horizontal telescopic pipe of the grain suction assembly is fixed on the outer ring. The angle encoder controller 23 is mounted on the slewing drive device 143. The slewing drive device 143 drives the outer ring of the slewing mechanism 142 to rotate around the inner ring and causes the horizontal telescopic pipe fixed on the outer ring to rotate in the horizontal direction to change the grain suction area of ​​the grain suction assembly. The angle encoder controller 23 located on the slewing drive device 143 can limit the operation of the slewing drive device 143 according to the control command of the control system 17, thereby controlling the slewing angle of the horizontal telescopic pipe of the grain suction assembly.

[0064] The sum of the rotation angles of the horizontal telescopic pipes of the angle-encoded controller 23 of adjacent grain suction units 12 is ≤180°. When the rotation angle of the horizontal telescopic pipes of the angle-encoded controller 23 of adjacent grain suction units 12 is equal to 180° (e.g....), Figure 7 When θ1+θ2=180°, the first scenario is that the horizontal telescopic pipes of adjacent grain suction units 12 are parallel and perpendicular to the support system. If the horizontal telescopic pipe of one of the grain suction units 12 continues to rotate to the other side, it is easy to collide with the front end of the horizontal telescopic pipe of the other grain suction unit 12. Therefore, it is necessary to control the rotation angle of the horizontal telescopic pipe. The second scenario is that one of the grain suction units 12 is not operating and its horizontal telescopic pipe rotates to the dock shore and is located on one side of the support system, while the other grain suction unit 12 is operating normally. In this case, the rotation angle of its horizontal telescopic pipe needs to be less than 180°.

[0065] By adding a limit device such as an angle code controller 23 to the grain suction assembly, the rotation angle of the horizontal telescopic pipes of adjacent grain suction units 12 of the grain suction equipment, especially the double-pipe type wharf grain suction equipment installed on the same support frame 16, can be further locked, so as to realize the interlock between the rotation angles of the horizontal telescopic pipes during operation, thus doubly ensuring the operational safety of the equipment.

[0066] The support system 16 is a track-moving support frame 162, which is designed to better change the position of the grain suction device along the length of the larger cargo hold 21 when unloading, thereby improving the grain suction efficiency.

[0067] Example 3 Compared with Example 1, the dual-tube wharf grain suction device of this embodiment has the following differences: like Figure 9 As shown, the limiting device includes a diffuse reflection controller 5 disposed at one end of the horizontal telescopic pipe near the vertical material pipe 2, and an angle encoding controller 23; the angle encoding controller 23 is disposed at the other end of the horizontal telescopic pipe and on the slewing bearing device 14 that drives the grain suction assembly to rotate horizontally.

[0068] The working principle and usage method of a dual-tube wharf grain suction device according to the present invention: When the air source device operates, a high negative pressure flow field is formed within the suction system pipeline. Air carrying material is drawn in through the inlet of nozzle 1. Nozzle 1 consists of an inner tube and a outer tube, forming a secondary air channel between the two tubes. The secondary air enters nozzle 1 directly from top to bottom. By adjusting the gap between the two tubes at the nozzle 1 opening, different mixing ratios of primary and secondary air can be obtained. Increasing the secondary air gap will result in a higher suction output, but this will increase the system vacuum and power consumption. Alternatively, immersing nozzle 1 evenly into the material at a depth of 0.2-0.8m will achieve full suction output.

[0069] The material accelerates upwards at the suction nozzle section 1 and enters the vertical feed pipe 2. The vertical feed pipe 2 consists of multiple sections of varying lengths, which can be adjusted by adding or removing sections to accommodate large water level fluctuations. After passing through the vertical feed pipe 2, the material sequentially enters the ball joint 3, rectangular bend 4, horizontal telescopic pipe, connecting bend 11, and universal joint 13. When it is necessary to change the suction position of the grain suction assembly, the horizontal rotation angle of the assembly is adjusted via the slewing bearing device 14 (e.g., ...). Figure 4 , Figure 8In this process, the rotation of the slewing support device changes the angle between the horizontal telescopic pipe of the grain suction assembly and the support system of the berth. The angles θ1 and θ2 between the horizontal telescopic pipes of the two grain suction units and the support system of the berth can vary from 0 to 180°, and both are controlled by the control system. The rotation angles of the slewing support devices of the two grain suction units are interlocked under specific conditions. For example, in Embodiment 1, when the diffuse reflection controller 5 of the two grain suction units detects that the distance between the front ends of the horizontal telescopic pipes has decreased to close to or equal to a set value (e.g., 5m), the rotation of the slewing support devices of the two grain suction units is interlocked; or, in Embodiment 2, when the angle encoding controller 23 of the two grain suction units detects that the sum of the rotation angles of the horizontal telescopic pipes is close to 180°, the rotation of the slewing support devices of the two grain suction units is interlocked. Then, the length of the horizontal telescopic pipe is adjusted by the telescopic drive mechanism 10 (e.g., ...). Figure 6 The thick dashed line and solid line show the horizontal telescopic pipe in its initial contracted state and extended state, respectively, and the pitch drive device 18 adjusts the pitch angle of the horizontal telescopic pipe (e.g., ...). Figure 4 In Figure A, the suction pipe of the right suction unit is raised; in Figure B, the suction pipe of the right suction unit is raised. Figure 6 The dotted line and short line segment show the state of the horizontal telescopic pipeline after it is tilted down at a certain angle (e.g., -10°) and tilted up at a certain angle (e.g., +40°), respectively. This changes the position of the suction nozzle 1 at the end of the vertical material pipe 2, so as to contact and suck up the grain at different horizontal positions and heights, thereby completing the unloading operation.

[0070] After passing through the universal joint 13 at the root of the horizontal telescopic pipe, the material is ejected into the unloading dust collector 15, where the material and airflow are separated. Inside the unloading dust collector, the dust-laden airflow disperses and rises, entering the filter assembly for filtration and purification. The dust-laden airflow rises to the filter bag and is trapped by the filter bag, and the purified gas is discharged through the filter bag. The reverse pulse dust collector periodically sprays in reverse to clean the dust accumulated on the surface of the filter bag, maintaining filtration capacity. The dust accumulated on the filter bag falls to the bottom of the dust collector by gravity and is sealed and discharged by the airlock 20. The material entering the unloading dust collector 15 is guided and thrown into the airlock 20. After being discharged from the airlock 20, the material is transported to a designated location, such as the silo 22, through the subsequent grain discharge assembly 19.

[0071] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is only used to illustrate the technical solution of the present invention, and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

[0072] In the description of this invention, it should be understood that the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0073] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A dual-tube type wharf grain suction device, characterized in that, include: The system includes a support system and two sets of grain suction units (12). The grain suction units (12) are symmetrically arranged on the support system, and each set of grain suction units (12) can operate independently or in coordination with other grain suction units (12). The grain suction unit (12) includes a discharge dust removal device (15), an air source device, a grain discharge component (19), a grain suction component, and a control system. The air source device is connected to the discharge dust removal device (15) and is located between the grain discharge component (19) and the grain suction component. The grain suction component and the grain discharge component (19) are respectively connected to the feed end and the discharge end of the discharge dust removal device (15). The grain suction component can rotate relative to the support system. The grain suction component is equipped with a limiting device connected to the control system. The limiting device ensures that the grain suction component always maintains a safe distance from the adjacent grain suction component or other equipment when its position changes.

2. The dual-tube type grain suction device for wharfs as described in claim 1, characterized in that, The grain suction assembly includes: a horizontal telescopic pipe, a rectangular bend (4), a ball joint (3), and a vertical material pipe (2). One end of the rectangular bend (4) is connected to the horizontal telescopic pipe, and the other end is connected to the vertical material pipe (2) through the ball joint (3). The lower end of the vertical material pipe (2) is provided with a suction nozzle (1). The limiting device includes a diffuse reflection controller (5) disposed at one end of the horizontal telescopic pipe near the vertical material pipe (2), and / or an angle encoding controller (23). The angle encoding controller (23) is disposed on a slewing bearing device (14), which is disposed at the other end of the horizontal telescopic pipe and drives the grain suction assembly to rotate horizontally.

3. The dual-tube type wharf grain suction equipment as described in claim 2, characterized in that, The distance between the diffuse reflection controllers (5) on the horizontal telescopic pipes of adjacent grain suction units (12) is greater than or equal to 5m, or the sum of the rotation angles of the horizontal telescopic pipes of the angle encoding controllers (23) of adjacent grain suction units (12) is ≤180°.

4. A dual-tube wharf grain suction device as described in any one of claims 1 to 3, characterized in that, The support system (16) is a fixed support frame (161) or a movable support frame (162).

5. A dual-tube wharf grain suction device as described in claim 2, characterized in that, One end of the slewing bearing device (14) is connected to the end of the horizontal telescopic pipeline away from the vertical material pipe (2) through a universal joint (13) and a connecting bend (11), and the other end is connected to the dust removal device of the grain suction equipment. The horizontal telescopic pipeline can rotate horizontally as the slewing bearing device (14) rotates. The slewing bearing device (14) includes a mounting base (141) for connecting the slewing bearing device (14) and the unloading dust removal device (15), a slewing mechanism (142) provided on the mounting base (141), and a slewing drive device (143). The slewing mechanism (142) includes an inner ring and an outer ring that rotate together. The inner ring is fixed on the mounting base (141), and the telescopic beam arm (7) on the horizontal telescopic pipeline of the grain suction assembly is fixed on the outer ring. The slewing drive device (143) drives the outer ring of the slewing mechanism (142) to rotate around the inner ring and causes the horizontal telescopic pipeline fixed on the outer ring to rotate in the horizontal direction to change the grain suction area of ​​the grain suction assembly.

6. A dual-tube wharf grain suction device as described in claim 2, characterized in that, The horizontal telescopic pipeline is equipped with an adjustment device for adjusting the pitch angle and telescopic length of the horizontal telescopic pipeline.

7. A dual-tube wharf grain suction device as described in claim 6, characterized in that, The adjustment device includes a pitch drive mechanism, a telescopic beam arm (7) and a telescopic drive mechanism (10). One end of the telescopic beam arm (7) is rotatably mounted on a slewing bearing device (14), and the other end is connected to the pitch drive device (18) via a steel wire rope (9). The fixed end of the pitch drive device (18) is connected to the dust removal device of the grain suction equipment. The telescopic beam arm (7) is provided with a telescopic drive mechanism (10) at the end away from the vertical material pipe (2). A horizontal telescopic pipeline is provided on the telescopic beam arm (7). The horizontal telescopic pipeline includes a fixed pipe (8) and a movable pipe (6). The movable pipe (6) is sleeved inside the fixed pipe (8). The other end of the fixed pipe (8) is connected to the unloading dust removal device (15) via a connecting bend (11) and a universal pipe hinge (13). The telescopic drive mechanism (10) drives the telescopic beam arm (7) to extend and retract, thereby driving the movable pipe (6) of the horizontal telescopic pipeline to move horizontally along the fixed pipe (8) and changing the total length of the horizontal telescopic pipeline.

8. A dual-tube wharf grain suction device as described in claim 1, characterized in that, The control system is a PLC control system, which is electrically connected to the limit device, the slewing bearing device (14), the adjustment device, and the fan and dust removal device of the grain suction equipment.

9. A dual-tube wharf grain suction device as described in claim 1, characterized in that, The unloading dust removal device (15) includes an unloading dust collector, an airlock (20), and a reverse pulse dust collector. The top of the unloading dust collector is equipped with a filter assembly, which consists of a filter bag, a filter frame, and a pulse guide ring. The pulse guide ring is connected to the reverse pulse dust collector. The airlock (20) is located at the bottom of the unloading dust collector and is located above the feed end of the grain discharge assembly (19).

10. A dual-tube type wharf grain suction device as described in claim 9, characterized in that, The grain discharge assembly (19) includes a conveyor and a discharge chute. The feed end of the conveyor is connected to the discharge end of the airlock (20), and the other end is connected to the vertically arranged discharge chute. The discharge chute is connected to the silo (22).

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