Powder pressurized pneumatic conveying experimental device

Abstract

The utility model discloses a powder pressure sends formula pneumatic conveying experimental device, including feed cylinder, end cover, back blow gas storage subassembly, feed blow gas subassembly, pipeline and support, the side end of feed cylinder is provided with feed pipe, and the detachable connection of feed pipe has blind plate, and the lower extreme of feed cylinder is provided with the discharge pipe, the upper end of feed cylinder is sealedly connected in end cover, and the upper connection of end cover has vacuum pressure gauge and radar level gauge, the lower extreme of end cover is installed with metal powder sintering filter core, and back blow gas storage subassembly communicates with metal powder sintering filter core, feed blow gas subassembly is connected in the lower part of feed cylinder, and the discharge pipe is connected with floating ball valve, and the lower extreme of pipeline is connected in floating ball valve, and feed cylinder fixed mounting is in support. The utility model's pneumatic conveying experimental device solves the poor versatility of existing experimental device, the operation complex etc. problem, realizes the efficient, accurate simulation of different powder under different working conditions.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic conveying technology, specifically to a powder pressure conveying pneumatic conveying experimental device. Background Technology

[0002] Conveying capacity is a key factor affecting the safe and reliable operation of a system. Currently, the design of pneumatic conveying devices mainly relies on empirical formulas or curves, but due to the diversity of material characteristics and operating conditions, there is no universal calculation formula. Therefore, data must be obtained through simulation experiments in actual design. Existing experimental devices are difficult to simulate different powder characteristics and operating condition changes, and lack comprehensive control over pressure, powder quality, and pipeline shape. The experimental process is cumbersome and data acquisition efficiency is low.

[0003] Therefore, there is a need to provide a powder pressure conveying pneumatic conveying experimental device to solve the above problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a powder pressure conveying pneumatic conveying experimental device, which can realistically simulate the influence of different powders on conveying capacity under different pressures, different initial powder masses, and different pipeline layout shapes. It solves the problems of poor versatility, insufficient accuracy, and complex operation of existing experimental devices, and achieves efficient and accurate simulation of different powders under different working conditions.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A powder pressure conveying pneumatic conveying experimental device includes:

[0007] A feed cylinder is used to temporarily store experimental powders, and a feed pipe is provided at the side end of the feed cylinder. A blind plate is detachably connected to the feed pipe, and a discharge pipe is provided at the lower end of the feed cylinder.

[0008] An end cap is sealed to the upper end of the feed cylinder, and a vacuum pressure gauge and a radar level gauge are connected to the end cap. The vacuum pressure gauge is used to monitor the pressure change inside the feed cylinder, and the radar level gauge is used to measure the level height of the experimental powder inside the feed cylinder.

[0009] A backflush gas storage assembly is provided, wherein a metal powder sintered filter element is installed at the lower end of the end cap, and the backflush gas storage assembly is connected to the inside of the feed cylinder through the metal powder sintered filter element.

[0010] The pipeline, with a floating ball valve connected to the discharge pipe, is connected to the lower end of the floating ball valve and is used to transport experimental powder.

[0011] The support frame, on which the feed cylinder is fixedly mounted, supports the overall structure of the experimental device.

[0012] As a further improvement to the above technical solution, the feed cylinder includes a straight cylindrical cylinder and a conical cylinder. The conical cylinder is connected to the lower end of the straight cylindrical cylinder. The feed pipe is disposed on the straight cylindrical cylinder, and the discharge pipe is disposed at the lower end of the conical cylinder. A first connecting flange is welded to the upper end of the straight cylindrical cylinder. The end cover includes a second connecting flange and an O-ring. The second connecting flange is fixedly connected to the first connecting flange, and the O-ring is disposed between the first connecting flange and the second connecting flange.

[0013] As a further improvement to the above technical solution, the lower end of the cylindrical tube extends obliquely outward with a first opening pipe, and a viewing mirror is fixedly connected to the first opening pipe.

[0014] As a further improvement to the above technical solution, the cylindrical tube is equipped with an air hammer, the air hammer has a first threaded straight end installed at its air inlet, and an air hammer has a silencer installed at its air outlet.

[0015] As a further improvement to the above technical solution, a fixing plate is provided at both the upper and lower ends of the cylindrical tube, and the fixing plate is fixedly connected to the bracket.

[0016] As a further improvement to the above technical solution, the end cover also includes an ellipsoidal cover, a mounting plate, and a branch pipe seat. The ellipsoidal cover is disposed above the mounting plate and is connected to the mounting plate within the second connecting flange. The ellipsoidal cover communicates with the feed cylinder, and a third perforated pipe is provided through the ellipsoidal cover. The vacuum pressure gauge is installed at the upper end of the third perforated pipe, and the branch pipe seat is disposed at the center of the ellipsoidal cover and the mounting plate. The lower end of the branch pipe seat communicates with the feed cylinder, and the radar level gauge is installed at the upper end of the branch pipe seat. A cavity is formed between the ellipsoidal cover, the mounting plate, and the branch pipe seat, and an annular branch pipe is provided within the cavity. The annular branch pipe communicates with the backflush gas storage assembly and the sintered metal powder filter element, respectively.

[0017] As a further improvement to the above technical solution, the mounting plate is provided with a plurality of fourth opening pipes, the upper end of the fourth opening pipes is connected to the annular branch pipe, the metal powder sintered filter element is installed at the lower end of the fourth opening pipe, and an L-shaped branch pipe is connected to one side of the annular branch pipe, and the backflush gas storage assembly is connected to the L-shaped branch pipe.

[0018] As a further improvement to the above technical solution, the backflush air storage assembly includes a pneumatic angle seat valve, an air storage tank, and a quick-connect ball valve. The air inlet of the pneumatic angle seat valve is equipped with a second threaded straight-through. The lower end of the pneumatic angle seat valve is connected to the L-shaped branch pipe. The air storage tank is connected to the upper end of the pneumatic angle seat valve, and the quick-connect ball valve is connected to the upper end of the air storage tank.

[0019] As a further improvement to the above technical solution, the pneumatic conveying experimental device also includes a feeding air blowing assembly connected to the lower part of the feeding cylinder. The feeding air blowing assembly includes a feeding air blowing pipe, a welded filter, and a hand valve. The lower end of the conical cylinder extends obliquely outward with two symmetrical second opening pipes. Each of the two second opening pipes is connected to a welded filter. One end of the feeding air blowing pipe is connected to the two welded filters respectively. The other end of the feeding air blowing pipe is provided with a third threaded straight-through, which is connected to the hand valve.

[0020] As a further improvement to the above technical solution, a reducing joint is provided at the end of the pipe, and a dustproof bag is installed on the reducing joint.

[0021] The beneficial effects of this utility model are:

[0022] This invention utilizes a spacious feed cylinder and a detachable blind flange design to meet the powder quantity requirements of different experimental scales while ensuring airtightness. A vacuum pressure gauge and radar level gauge installed on the end cap allow for real-time and accurate monitoring of pressure and measurement of the material level. A sintered metal powder filter element filters gas impurities to ensure powder purity, while a backflushing gas storage component removes powder adhering to the filter element by blowing air in the opposite direction. The feed blowing component and the backflushing gas storage component work together to precisely control the pressure environment of the feed cylinder to simulate different conveying conditions. The floating ball valve in the discharge pipe has excellent sealing and switching performance, and the pipeline can be flexibly selected to simulate actual working conditions. This device can realistically simulate the conveying capacity of different powders under different pressures, initial masses, and pipeline layouts, effectively solving the problems of poor versatility, insufficient accuracy, and complex operation of existing experimental devices, achieving efficient and accurate simulation of different powders under different working conditions. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a first-view structural schematic diagram of the pneumatic conveying experimental device of this utility model;

[0025] Figure 2 This is a second-view structural schematic diagram of the pneumatic conveying experimental device of this utility model;

[0026] Figure 3 This is a third-view structural schematic diagram of the pneumatic conveying experimental device of this utility model;

[0027] Figure 4 This is a schematic diagram of the internal structure of the end cap of this utility model.

[0028] Reference numerals: 1. Feed cylinder; 11. Feed pipe; 12. Blind flange; 13. Discharge pipe; 14. Circular straight cylinder; 141. First connecting flange; 142. First perforated pipe; 143. Lens; 15. Conical cylinder; 151. Second perforated pipe; 16. Fixing plate; 2. End cap; 21. Vacuum pressure gauge; 211. Third perforated pipe; 22. Radar level gauge; 23. Sintered metal powder filter element; 24. Second connecting flange; 25. O-ring; 26. Elliptical cover; 27. Mounting plate; 271 1. Fourth opening pipe; 28. Branch pipe seat; 29. ​​Ring branch pipe; 291. L-shaped branch pipe; 3. Backflush air storage assembly; 31. Pneumatic angle seat valve; 311. Second threaded straight-through; 32. Air storage tank; 33. Quick-install ball valve; 4. Feed air blowing assembly; 41. Feed air blowing pipe; 42. Welded filter; 43. Hand valve; 44. Third threaded straight-through; 5. Pipeline; 6. Floating ball valve; 7. Support; 8. Air hammer; 81. First threaded straight-through; 82. Silencer; 9. Reducing joint; 10. Dustproof bag. Detailed Implementation

[0029] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0030] Reference Figures 1 to 4A powder pressure conveying pneumatic conveying experimental device includes a feed cylinder 1, an end cap 2, a backflushing air storage component 3, a feed blowing component 4, a pipe 5, and a support 7. The feed cylinder 1 has a spacious interior for temporarily storing experimental powders to meet the powder quantity requirements of different experimental scales. A feed pipe 11 is provided on the side of the feed cylinder 1, and a blind plate 12 is detachably connected to the feed pipe 11. The blind plate 12 is tightly connected to the feed pipe 11 through a flange to ensure sealing when adjusting the vacuum pressure of the feed cylinder. During the experiment, the blind plate 12 can be opened to allow different experimental powders to be conveyed into the feed cylinder 1 through the feed pipe 11. A discharge pipe 13 is provided at the lower end of the feed cylinder 1 to ensure that the experimental powders can flow out smoothly.

[0031] The end cap 2 is sealed to the upper end of the feed cylinder 1 using a flange connection, with a dedicated sealing gasket at the connection point to ensure the sealing and stability of the connection. A vacuum pressure gauge 21 and a radar level gauge 22 are connected to the end cap 2. The detection ends of both the vacuum pressure gauge 21 and the radar level gauge 22 are positioned above the feed cylinder 1, allowing the vacuum pressure gauge 21 to monitor pressure changes within the feed cylinder 1 in real time and accurately, providing researchers with accurate pressure data for timely adjustment of experimental parameters. The radar level gauge 22 utilizes advanced radar technology to precisely measure the level of powder within the feed cylinder 1, providing crucial information for calculating powder delivery volume and experimental results.

[0032] The lower end of the end cap 2 is equipped with a metal powder sintered filter element 23. The backflush gas storage component 3 is connected to the inside of the feed cylinder 1 through the metal powder sintered filter element 23. The metal powder sintered filter element 23 has the advantages of high filtration accuracy, good air permeability, and high temperature resistance. It can effectively filter impurities in the gas entering the feed cylinder 1 and ensure the purity of the powder. The backflush gas storage component 3 can blow air back onto the metal powder sintered filter element 23 when needed to remove the powder adhering to the filter element.

[0033] A floating ball valve 6 is connected to the discharge pipe 13, which has good sealing and switching flexibility, and can quickly cut off or open the powder conveying channel when needed. The pipe 5 is connected to the lower end of the floating ball valve 6 to convey the experimental powder. In addition, different types of pipes 5 can be selected, such as steel wire hoses, straight pipes, bends and inclined pipes, to simulate different actual working conditions.

[0034] The feed cylinder 1 is fixedly installed on the support 7. The support 7 is made of high-strength steel and has sufficient stability and load-bearing capacity to support the overall structure of the experimental device, ensuring that the device will not tilt or collapse due to vibration or external force during the experiment, thus ensuring the safety and smooth progress of the experiment.

[0035] By adopting this pneumatic conveying experimental device, the effects of different powders on conveying capacity under different pressures, different initial powder masses, and different pipeline layouts can be realistically simulated. This solves the problems of poor versatility, insufficient precision, and complex operation of existing experimental devices, and achieves efficient and accurate simulation of different powders under different working conditions.

[0036] Reference Figure 2 In this embodiment of the invention, the feed cylinder 1 includes a straight cylindrical cylinder 14 and a conical cylinder 15. The conical cylinder 15 is welded to the lower end of the straight cylindrical cylinder 14 to ensure good sealing and sufficient structural strength at the connection between the two. The conical cylinder 15 is designed to be wider at the top and narrower at the bottom, which guides the powder to slide down naturally under its own gravity, effectively reducing powder residue in the cylinder and improving powder conveying efficiency. The feed pipe 11 is set on the straight cylindrical cylinder 14 so that the experimenter can accurately and smoothly input experimental powders of different masses into the feed cylinder 1. The discharge pipe 13 is set at the lower end of the conical cylinder 15. The diameter of the discharge pipe 13 matches the outlet size at the lower end of the conical cylinder 15, ensuring that the powder can smoothly enter the discharge pipe 13 from the conical cylinder 15 and be conveyed out along the pipe 5. The connection between the discharge pipe 13 and the conical cylinder 15 also adopts a reliable welding method to ensure... To prevent powder leakage at the connection point, the upper end of the cylindrical tube 14 is welded with a first connecting flange 141. The end cap 2 includes a second connecting flange 24 and an O-ring 25. The structure of the second connecting flange 24 is adapted to the first connecting flange 141, and both have corresponding bolt holes. The second connecting flange 24 is fixedly connected to the first connecting flange 141. During the connection process, high-strength bolts and nuts are used to ensure that the second connecting flange 24 and the first connecting flange 141 are tightly and firmly fixed together by uniform tightening, forming a stable overall structure. The O-ring 25 is placed between the first connecting flange 141 and the second connecting flange 24, filling the tiny gap between the flange connection surfaces, effectively preventing gas and powder leakage, ensuring a sealed environment inside the feed cylinder 1, and providing a reliable guarantee for the smooth progress of the experiment.

[0037] Reference Figure 2 In an embodiment of this utility model, the lower end of the cylindrical tube 14 extends obliquely outward with a first opening pipe 142, and a viewing mirror 143 is fixedly connected to the first opening pipe 142, so that the experimenter can clearly observe the flow state and accumulation of powder inside the feed cylinder 1 through the viewing mirror 143, providing an intuitive basis for monitoring and adjusting the experimental process.

[0038] Reference Figure 3In this embodiment of the present invention, an air hammer 8 is installed at the lower end of the cylindrical cylinder 14, which can help the powder flow smoothly from the feed cylinder 1 through vibration when needed, preventing the powder from being blocked or accumulated in the cylinder; the air inlet end of the air hammer 8 is equipped with a first threaded straight-through 81, which facilitates a quick and reliable connection with an external air source pipeline; the air source enters the air hammer 8 through the first threaded straight-through 81 to provide power for the operation of the air hammer 8, and the air outlet end of the air hammer 8 is equipped with a silencer 82. The silencer 82 adopts a special sound-absorbing structure inside, such as porous sound-absorbing material and expansion cavity, which can effectively reduce the noise generated by the air hammer 8 during operation, reduce interference with the experimental environment, and also meet the requirements of environmental protection and safety.

[0039] Reference Figure 2 In this embodiment of the present invention, a fixing plate 16 is provided at both the upper and lower ends of the cylindrical cylinder 14. The fixing plate 16 is provided with multiple mounting holes. The fixing plate 16 is firmly fixed to the support 7 by high-strength bolts and nuts. This not only ensures the stability of the feed cylinder 1 on the support 7, but also effectively disperses the vibration and stress generated by the cylindrical cylinder 14 and the powder inside during operation, preventing the cylindrical cylinder 14 from shaking or deforming, and ensuring that the entire experimental device can operate safely and stably.

[0040] Reference Figure 4 In an embodiment of this utility model, the end cap 2 further includes an ellipsoidal cap 26, a mounting plate 27, and a branch pipe seat 28. The ellipsoidal cap 26 is disposed above the mounting plate 27, and the ellipsoidal cap 26 and the mounting plate 27 are connected within the second connecting flange 24. The ellipsoidal cap 26 communicates with the feed cylinder 1 to ensure that the air pressure of the ellipsoidal end cap is the same as the air pressure inside the feed cylinder 1. A third perforated pipe 211 is provided through the ellipsoidal cap 26, and a vacuum pressure gauge 21 is installed at the upper end of the third perforated pipe 211, enabling the vacuum pressure gauge 21 to measure the vacuum pressure inside the feed cylinder 1 in real time and accurately, providing key parameter information for experimental personnel. The branch pipe seat 28 is located at the center of the ellipsoidal cap 26 and the mounting plate 27. The lower end of the branch pipe seat 28 is connected to the feed cylinder 1, and the radar level gauge 22 is installed at the upper end of the branch pipe seat 28. This allows the radar level gauge 22 to utilize advanced radar technology and connect to the feed cylinder 1 via the branch pipe seat 28, enabling it to accurately measure the level of powder in the feed cylinder 1 and provide data support for precise experimental control. Furthermore, the ellipsoidal cover 26, the mounting plate 27, and the branch pipe seat 28 form a cavity, which plays an important role in integration and protection. An annular branch pipe 29 is installed in the cavity, and the annular branch pipe 29 is connected to the backflush gas storage component 3 and the metal powder sintered filter element 23, forming a complete gas flow loop to ensure that the backflush gas in the backflush gas storage component 3 can be smoothly delivered to the metal powder sintered filter element 23.

[0041] Specifically, the mounting plate 27 is provided with multiple fourth opening pipes 271. The number and position of the fourth opening pipes 271 are designed according to actual needs to ensure the uniformity of gas distribution. The upper end of the fourth opening pipe 271 is connected to the annular branch pipe 29, so that the backflushing gas can enter the fourth opening pipe 271 from the annular branch pipe 29. The metal powder sintered filter element 23 is installed at the lower end of the fourth opening pipe 271. The backflushing gas acts on the metal powder sintered filter element 23 through the fourth opening pipe 271 to remove the powder adhering to the filter element. Furthermore, an L-shaped branch pipe 291 is connected to one side of the annular branch pipe 29. The backflushing gas storage assembly 3 is connected to the L-shaped branch pipe 291 to transport the stored backflushing gas to the annular branch pipe 29 through the L-shaped branch pipe 291, thereby realizing the backflushing operation of the metal powder sintered filter element 23.

[0042] Reference Figure 3 , Figure 4 In this embodiment of the invention, the backflush gas storage assembly 3 includes a pneumatic angle seat valve 31, a gas storage tank 32, and a quick-connect ball valve 33. The air inlet of the pneumatic angle seat valve 31 is fitted with a second threaded straight-through 311 to ensure a tight and stable connection with the external gas source pipeline, capable of withstanding a certain gas pressure and preventing gas leakage. The lower end of the pneumatic angle seat valve 31 is connected to the upper end of the L-shaped branch pipe 291. The connection method uses suitable sealing gaskets and flange bolts to ensure the sealing of the connection and the stability of the structure. When the pneumatic angle seat valve 31 is opened, the backflush gas stored in the subsequent components can smoothly pass through the pneumatic angle seat valve 31 into the L-shaped branch pipe 291, and then be transported to the metal powder sintered filter element 23 that needs backflush cleaning. Furthermore, the internal volume of the gas storage tank 32 is precisely calculated and rationally designed according to the operational requirements of the experimental device and the amount of backflush gas used. The system is designed to store a sufficient amount of backflushing gas, ensuring a stable and ample gas supply when backflushing is required. The gas storage tank 32 is connected to the upper end of the pneumatic angle seat valve 31. The connection between the gas storage tank 32 and the pneumatic angle seat valve 31 also adopts a reliable sealing and connection method to prevent gas leakage between the two, ensuring the sealing and stability of the entire gas delivery system. The quick-connect ball valve 33 is connected to the upper end of the gas storage tank 32. One end of the quick-connect ball valve 33 is tightly connected to the gas storage tank 32 by means of a clamp connection, and the other end is used to connect to an external gas supply pipeline or other related equipment. Through the quick-connect ball valve 33, the experimenter can easily control the external gas source to fill the gas storage tank 32. When needed, the valve can be quickly opened for filling, and when filling is not required or equipment maintenance is required, the valve can be quickly closed to ensure the safety of the system and the convenience of operation.

[0043] Reference Figure 3In an embodiment of this utility model, the pneumatic conveying experimental device further includes a feeding air blowing component 4 connected to the lower part of the feeding cylinder 1, which can work in conjunction with the backflushing air storage component 3 to adjust the vacuum pressure of the feeding cylinder 1. By adjusting the air intake of the feeding air blowing component 4 and the backflushing air volume of the backflushing air storage component 3, the pressure environment inside the feeding cylinder 1 can be precisely controlled to simulate different conveying conditions. In addition, when discharging material after the experiment, it can also be used in conjunction with the air hammer 8 to assist in discharging material.

[0044] Specifically, the feeding air blowing assembly 4 includes a feeding air blowing pipe 41, a welded filter 42, and a hand valve 43. The lower end of the conical cylinder 15 extends outwards at two symmetrically arranged second opening pipes 151. This ensures that the gas blown in from the feeding air blowing assembly 4 can act evenly and effectively on the powder inside the conical cylinder 15, promoting powder flow, without adversely affecting the overall structure and stability of the conical cylinder 15. Welded filters 42 are connected to each of the two second opening pipes 151. One end of the feeding air blowing pipe 41 is connected to each of the two welded filters 42, and the other end of the feeding air blowing pipe 41 is provided with a third threaded straight-through 44, which is connected to the hand valve 43. Through the hand valve 43, the experimenter can easily manually control the flow and cut-off of gas in the feeding air blowing assembly 4. When feeding air is needed, the hand valve 43 is opened to allow gas to pass smoothly; when feeding air is not needed or equipment maintenance is required, the hand valve 43 is closed to ensure system safety and operational flexibility.

[0045] Reference Figure 1 In this embodiment of the present invention, a reducing joint 9 is provided at the end of the pipe 5, and a dustproof bag 10 is installed on the reducing joint 9. The dustproof bag 10 is firmly installed at the outlet of the reducing joint 9 by a hose clamp. When the powder flows out from the reducing joint 9, the dustproof bag 10 can effectively intercept the powder and prevent it from spreading to the surrounding environment, thus playing a good dustproof role and protecting the cleanliness of the experimental environment and the health of the experimental personnel.

[0046] The working process of this utility model is as follows:

[0047] (1) Pressure holding test: Connect the second threaded straight-through 311 and the third threaded straight-through 44 to the air source, close the floating ball valve 6, and open the quick-connect ball valve 33, the pneumatic angle seat valve 31 and the hand valve 43. When the vacuum pressure gauge 21 shows a pressure of 0.3MPa, close the quick-connect ball valve 33 and the hand valve 43. If the leakage is less than 1% after holding the pressure for 24 hours, it is qualified, ensuring the sealing and reliability of the device.

[0048] (2) Feeding preparation: Open blind plate 12, and when vacuum pressure gauge 21 is zero, feed the experimental powder into feed cylinder 14 through feed pipe 11, and connect the first threaded straight pipe 81 to the air source to make air hammer 8 work. Observe the powder surface inside feed cylinder through lens 143 until the vibration is uniform, close air hammer 8, cover blind plate 12, and record the value W0 of radar level gauge 22 to complete the feeding and initial state recording.

[0049] (3) Pressure setting: Open the pneumatic angle seat valve 31, wait for the vacuum pressure gauge 21 to display P0, then close the pneumatic angle seat valve 31 to set the delivery pressure.

[0050] (4) Powder conveying: Open the floating ball valve 6 so that the powder is pressed into the pipeline 5 and conveyed to the dustproof bag 10. At the same time, open the hand valve 43 and the air hammer 8, and the feed air pipe 41 vents air into the feed cylinder 1 to assist the powder feeding and realize the powder conveying process.

[0051] (5) Status recording: After a period of time T(i), when the value of vacuum pressure gauge 21 is zero, close floating ball valve 6 and hand valve 43, and continue to work with air hammer 8. Observe the powder surface inside feed cylinder 1 through perspective lens 143 until the vibration is uniform. Close air hammer 8 and record the value W1 of radar level gauge 22. Record the status after conveying.

[0052] (6) Repeated conveying: Repeat (3)-(5) until all the powder in the feed cylinder 1 is conveyed, and record the number of repetitions A to complete the multiple conveying process.

[0053] (7) Production Calculation: Given the powder density and the volume of feed cylinder 1, the conveying mass Q(i) can be obtained by W1-W0. Then the production output = total mass Q(1+2+...+A) / total time T(1+2+...+A) can be calculated.

[0054] (8) Adjustment experiment: Repeat the above (2)-(7) experimental steps, adjust P0 and W0 to obtain different number of times A, so as to achieve different production output targets and explore the conveying effect under different parameters.

[0055] (9) Working condition simulation: Pipeline 5 uses steel wire hoses, which have the advantages of low cost and simple operation, as well as the characteristics of flexibility and easy adjustment. Straight pipes, bends and inclined pipes are arranged to simulate different actual working conditions and meet the experimental needs under different working conditions.

[0056] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A powder pressure conveying pneumatic conveying experimental device, characterized in that, include: A feed cylinder is used to temporarily store experimental powders, and a feed pipe is provided at the side end of the feed cylinder. A blind plate is detachably connected to the feed pipe, and a discharge pipe is provided at the lower end of the feed cylinder. An end cap is sealed to the upper end of the feed cylinder, and a vacuum pressure gauge and a radar level gauge are connected to the end cap. The vacuum pressure gauge is used to monitor the pressure change inside the feed cylinder, and the radar level gauge is used to measure the level height of the experimental powder inside the feed cylinder. A backflush gas storage assembly is provided, wherein a metal powder sintered filter element is installed at the lower end of the end cap, and the backflush gas storage assembly is connected to the inside of the feed cylinder through the metal powder sintered filter element. The pipeline, with a floating ball valve connected to the discharge pipe, is connected to the lower end of the floating ball valve and is used to transport experimental powder. The support frame, on which the feed cylinder is fixedly mounted, is used to support the overall structure of the experimental device.

2. The powder pressure conveying pneumatic conveying experimental device according to claim 1, characterized in that: The feed cylinder includes a straight cylindrical cylinder and a conical cylinder. The conical cylinder is connected to the lower end of the straight cylindrical cylinder. The feed pipe is disposed on the straight cylindrical cylinder, and the discharge pipe is disposed at the lower end of the conical cylinder. A first connecting flange is welded to the upper end of the straight cylindrical cylinder. The end cover includes a second connecting flange and an O-ring. The second connecting flange is fixedly connected to the first connecting flange, and the O-ring is disposed between the first connecting flange and the second connecting flange.

3. The powder pressure conveying pneumatic conveying experimental device according to claim 2, characterized in that: The lower end of the cylindrical tube extends obliquely outward with a first perforated connector, and a viewing lens is fixedly connected to the first perforated connector.

4. The powder pressure conveying pneumatic conveying experimental device according to claim 2, characterized in that: The cylindrical tube is equipped with an air hammer, the air hammer has a first threaded straight end installed at its air inlet, and an air hammer has a silencer installed at its air outlet.

5. The powder pressure conveying pneumatic conveying experimental device according to claim 2, characterized in that: The upper and lower ends of the cylindrical tube are both provided with fixing plates, which are fixedly connected to the bracket.

6. The powder pressure conveying pneumatic conveying experimental device according to claim 2, characterized in that: The end cap also includes an ellipsoidal cover, a mounting plate, and a branch pipe seat. The ellipsoidal cover is disposed above the mounting plate and is connected to the mounting plate within the second connecting flange. The ellipsoidal cover communicates with the feed cylinder, and a third perforated pipe is provided through the ellipsoidal cover. The vacuum pressure gauge is installed at the upper end of the third perforated pipe, and the branch pipe seat is located at the center of the ellipsoidal cover and the mounting plate. The lower end of the branch pipe seat communicates with the feed cylinder, and the radar level gauge is installed at the upper end of the branch pipe seat. A cavity is formed between the ellipsoidal cover, the mounting plate, and the branch pipe seat, and an annular branch pipe is provided within the cavity. The annular branch pipe communicates with the backflush gas storage assembly and the sintered metal powder filter element, respectively.

7. The powder pressure conveying pneumatic conveying experimental device according to claim 6, characterized in that: The mounting plate is provided with multiple fourth opening connectors. The upper end of the fourth opening connector is connected to the annular branch pipe. The metal powder sintered filter element is installed at the lower end of the fourth opening connector. An L-shaped branch pipe is connected to one side of the annular branch pipe. The backflush gas storage assembly is connected to the L-shaped branch pipe.

8. The powder pressure conveying pneumatic conveying experimental device according to claim 7, characterized in that: The backflush air storage assembly includes a pneumatic angle seat valve, an air storage tank, and a quick-connect ball valve. The air inlet of the pneumatic angle seat valve is equipped with a second threaded straight-through. The lower end of the pneumatic angle seat valve is connected to the L-shaped branch pipe. The air storage tank is connected to the upper end of the pneumatic angle seat valve, and the quick-connect ball valve is connected to the upper end of the air storage tank.

9. The powder pressure conveying pneumatic conveying experimental device according to claim 2, characterized in that: The pneumatic conveying experimental device also includes a feeding air blowing assembly connected to the lower part of the feeding cylinder. The feeding air blowing assembly includes a feeding air blowing pipe, a welded filter, and a hand valve. The lower end of the conical cylinder extends outward at two symmetrical second opening pipes, each connected to a welded filter. One end of the feeding air blowing pipe is connected to the two welded filters respectively, and the other end of the feeding air blowing pipe is provided with a third threaded straight-through, which is connected to the hand valve.

10. The powder pressure conveying pneumatic conveying experimental device according to claim 1, characterized in that: The pipe is equipped with a reducing joint at its end, and a dustproof bag is installed on the reducing joint.

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