Self-regulating powder material flow adapter device based on unpowered pneumatic conveying

Abstract

The present invention discloses a self-regulating powder material flow adapter device based on pneumatic conveying without a power source, which relates to the technical field of powder material conveying, including a frame, a feeding assembly, a discharge pipe, a dredging sleeve, a switching assembly, a fixing frame, a dredging assembly, a pressure relief pipe and an air guide hole. The switching assembly includes a conical air ring and an air outlet hole, and the conical air ring can close the air outlet hole; a bellows, which is connected to the end of the discharge pipe away from the switching assembly, and the dredging assembly includes a fixed cylinder and a vibration ring, which can slide back and forth relative to the fixed cylinder. The vibration ring is mounted on the outside of the bellows for dredging the bellows, and the dredging sleeve can slide up and down relative to the feeding assembly. The present invention achieves the function of special dredging of blockages in different pipelines by arranging the discharge pipe, the dredging sleeve, the switching assembly, the dredging assembly, the pressure relief pipe and the air guide hole, and can adjust the conveying efficiency and reduce the risk of blockage.

Description

Technical Field

[0001] The present invention relates to the technical field of powder material conveying, and in particular to a self-regulating powder material flow adapter based on pneumatic conveying without a power source. Background Art

[0002] Powder material conveying is a very important link in modern industry. It involves the process of transporting powdered materials from one location to another. Based on airflow dynamics, the operation of powder material pneumatic conveying devices is mainly divided into positive and negative modes. Positive pressure conveying, which uses compressed air to push the material to the target location, is suitable for long-distance and large-capacity conveying. Negative pressure conveying is often used in multi-point collection or closed environments. The material is sucked into the pipeline through vacuum technology to achieve the effect of conveying powder.

[0003] For example, Chinese patent application number 202211467708.9 discloses a powder material conveying device, comprising a fan, a feed member, a guide member, a collection barrel and a dust removal barrel, wherein the feed member comprises a conveying pipe, a feeding pipe and a feeding barrel, wherein a feeding pipe is vertically fixed through the middle of the outer end face of the conveying pipe, and a feeding barrel is vertically fixed to the top of the feeding pipe, one end of the conveying pipe is connected to the fan, and the other end of the conveying pipe is connected and fixed with a guide member, and the discharge end of the guide member is connected to the collection barrel. The invention overcomes the problem that the conveying volume and conveying efficiency of the existing powder material conveying device are mainly related to the discharge volume and the output air volume, the size of the air force is related to the power of the blower, and when the material is conveyed in the conveying pipeline, if the powder accumulates and causes the conveying pipeline to be blocked, the above-mentioned conveying device cannot automatically adjust the air intake and discharge volume according to the change of the internal pressure of the pipeline, and needs manpower to adjust and clear the blockage before the powder can be conveyed, which affects the efficiency of the conveying.

[0004] The above technical solution has some problems during use. When blockage occurs, this technical solution requires external pressure to clear the blockage, and cannot loosen the blockage position to achieve the purpose of clearing. It cannot specifically clear blockages in different pipelines, nor can it be adjusted according to the particle diameter of the powder and the blockage situation to reduce the probability of blockage.

[0005] Therefore, it is necessary to invent a self-regulating powder material flow adapter device based on unpowered pneumatic conveying to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a self-regulating powder material flow adapter device based on unpowered pneumatic conveying to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-regulating powder material flow adapter device based on unpowered pneumatic conveying, comprising a frame, a feeding assembly, and a feeding pipe connected at the lower end; a discharge pipe, which is fixedly connected to the inner side of the frame, and the middle part is connected to the feeding pipe; a dredging sleeve, which is sleeved on the outer side of the discharge pipe, the feeding pipe passes through the side wall of the dredging sleeve, and is sealed and slidably connected to the dredging sleeve, and the dredging sleeve can slide up and down relative to the feeding assembly; a switching assembly, which is placed on the inner side of the discharge pipe, and the discharge pipe is connected to the air pump at one end close to the switching assembly, and the switching assembly includes a conical air ring and an air outlet hole, The conical air ring can close the air outlet; the bellows is connected to the end of the discharge pipe away from the switching component; the fixed frame, the upper end of the fixed frame is fixedly connected to the output pipe, and the bellows is connected to the output pipe; the dredging component, the dredging component includes a fixed cylinder, which is fixedly connected to the lower end of the fixed frame; the vibration ring is arranged at one end of the fixed cylinder and can slide back and forth relative to the fixed cylinder, and the vibration ring is sleeved on the outside of the bellows; the pressure relief pipe, the middle part of which passes through the fixed cylinder and is connected to the fixed cylinder, and the lower end of the pressure relief pipe is connected to the dredging sleeve; the air guide hole is opened at one end of the discharge pipe close to the pressure relief pipe.

[0008] Preferably, the discharge pipe includes a rectangular section and a cylindrical section, the cylindrical sections are placed at both ends of the rectangular section, a transition section is connected between each cylindrical section and the rectangular section, and a plurality of vibration reeds are fixedly connected to the outer side of the rectangular section.

[0009] Preferably, the switching assembly also includes a limiting ring, which is fixedly connected to the inner side of the cylindrical section away from the side of the bellows; a reset member, which is fixed on one side of the limiting ring and the other end is in contact with the conical air ring; the air outlet is placed between the limiting ring and the conical air ring, and the air outlet passes through the side wall of the corresponding cylindrical section.

[0010] Preferably, the dredging assembly also includes a sliding plate, which is slidably connected to the inner side of the fixed cylinder; a connecting rod, an end of which passes through the side wall of the fixed cylinder and is fixedly connected to the vibration ring, and the other end of the connecting rod is fixedly connected to the sliding plate; a return spring, which is sleeved on the outer side of the connecting rod, and one end of the return spring is fixedly connected to the side wall of the fixed cylinder; the pressure relief pipe is connected to the side of the fixed cylinder away from the connecting rod.

[0011] Preferably, it further comprises a solenoid valve which is fixedly connected to the upper end of the fixing frame, wherein the input end of the solenoid valve is connected to the end of the pressure relief pipe, and the output end of the solenoid valve is connected to the output pipe.

[0012] Preferably, it also includes a hanger, which is fixedly connected to the two ends of the dredging sleeve; an adjusting screw, which is rotatably connected to the middle part of the frame, and the lower end of each adjusting screw is engaged with the corresponding hanger thread.

[0013] Preferably, the end of each cylindrical segment is fixedly connected to an arc-shaped tube, and the end of the arc-shaped tube close to the side of the corrugated tube is fixedly connected to a first flange.

[0014] Preferably, both ends of the bellows are fixedly connected with second flanges, and the second flange at the lower end of the bellows is connected to the first flange by bolts.

[0015] Preferably, the discharge assembly includes a hopper, the outer side of which is fixedly connected to the inner side of the frame, and the hopper has a conical structure; the discharge pipe is fixedly connected to the lower end of the hopper.

[0016] Preferably, a sealing sleeve is sleeved on the outer side of the discharge pipe, and the other end of the sealing sleeve is fixedly connected to the dredging sleeve.

[0017] Technical effects and advantages of the present invention:

[0018] 1. The present invention dredges the material entry position by setting a discharge pipe, a dredging sleeve and a switching component. During use, the air pump injects a constant pressure airflow into the discharge pipe to convey the powder in the discharge pipe. When the discharge pipe is blocked, the gas in the rectangular section cannot flow. At this time, the reset part pushes the conical air ring to slide and open the air hole. The gas enters between the discharge pipe and the dredging sleeve through the air hole, and then enters from the cylindrical section on the other side. At the same time, part of the gas still enters the rectangular section through the conical air ring and the hole on the inner side of the limit ring. When the airflow flows between the discharge pipe and the dredging sleeve, it pushes the vibrating reed to vibrate, thereby vibrating and dredging the blocked position in the rectangular section.

[0019] 2. The present invention achieves the purpose of unblocking the powder conveying pipeline by providing a unblocking component, a pressure relief pipe, an air guide hole and a solenoid valve. During use, the gas enters the fixed cylinder through the pressure relief pipe, causing the sliding plate to slide to one side. At the same time, the connecting rod and the vibration ring move the middle part of the bellows. Then the solenoid valve is controlled to be turned on, and the gas enters the output pipe through the solenoid valve and is discharged. At this time, the pressure in the fixed cylinder disappears, and the connecting rod resets the bellows synchronously through the vibration ring. During this process, the discharge pipe continuously delivers gas of constant pressure into the bellows, and the solenoid valve is repeatedly opened and closed to cause the bellows to bend repeatedly, thereby unblocking the blockage inside the bellows. The constant pressure gas enables the powder inside the bellows to be quickly discharged after the bellows are unblocked.

[0020] 3. The present invention provides a hanger and an adjusting screw so that it can be adjusted according to the particle diameter of the powder and the blockage condition. During use, the relative height between the discharge pipe and the downpipe can be adjusted by manually rotating the adjusting screw. When the downpipe is at a greater height relative to the inner bottom of the rectangular section, the powder conveying efficiency is higher. Higher output efficiency is more likely to cause blockage. When the equipment is frequently blocked, the height of the downpipe relative to the inner bottom of the rectangular section is adjusted to reduce the powder content in the gas under the same gas flow rate, thereby reducing the probability of blockage.

[0021] 4. The present invention achieves the purpose of facilitating the replacement of the conveying pipeline by setting the first flange and the second flange, preventing the pipeline from aging and damage after long-term use, which causes powder leakage during the powder conveying process. The multiple flanges are fixed by bolts, making it easy to disassemble and replace the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the positional relationship between the frame and the blanking assembly in the present invention.

[0023] Figure 2 Schematic diagram of the connection state of the discharge pipe and the bellows in the present invention.

[0024] Figure 3 It is a cross-sectional view of the discharge pipe and the dredging sleeve in the present invention.

[0025] Figure 4 Schematic diagram of various states of the switching component in the present invention.

[0026] Figure 5 It is a structural schematic diagram of the dredging component in the present invention.

[0027] Figure 6 Schematic diagram of the internal gas flow direction of the discharge pipe in the powder conveying state of the present invention.

[0028] Figure 7 Schematic diagram of the internal gas flow when the discharge pipe is blocked in the present invention.

[0029] In the figure: 1. Frame; 2. Feeding assembly; 3. Feeding pipe; 4. Dredging sleeve; 5. Switching assembly; 6. Bellows; 7. Fixing frame; 71. Output pipe; 8. Dredging assembly; 9. Pressure relief pipe; 10. Air guide hole; 11. Solenoid valve; 12. Hanger; 13. Adjusting screw; 14. Arc tube; 15. First flange; 16. Second flange; 17. Closing sleeve; 21. Feeding pipe; 22. Hopper; 51. Conical air ring; 52. Air outlet; 53. Limiting ring; 54. Resetting part; 81. Fixed cylinder; 82. Vibrating ring; 83. Sliding plate; 84. Connecting rod; 85. Resetting spring; 31. Rectangular section; 32. Cylindrical section; 33. Transition section; 34. Vibrating reed. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The present invention provides Figures 1 to 7 The self-regulating powder material flow adapter device based on non-powered pneumatic conveying shown includes a frame 1. The bottom of the frame 1 can be installed with universal wheels as needed to facilitate movement. It also includes a discharge assembly 2, which is fixedly connected to the upper end of the frame 1, and the lower end is connected to a discharge pipe 21. The discharge assembly 2 includes a hopper 22, the outer side of which is fixedly connected to the inner side of the frame 1, and the hopper 22 has a conical structure; the discharge pipe 21 is fixedly connected to the lower end of the hopper 22. When in use, the powder to be conveyed is poured into the hopper 22, and the powder slides downward under gravity and is discharged through the discharge pipe 21; the discharge pipe 3 is fixedly connected to the inner side of the frame 1, and the middle part is connected to the discharge pipe 21. The end of the discharge pipe 21 passes through the side wall of the discharge pipe 3 and is placed on the inner side of the discharge pipe 3. When in use, the powder can enter the discharge pipe 3. , and is transported through the discharge pipe 3; the dredging sleeve 4 is sleeved on the outside of the discharge pipe 3, the discharge pipe 21 passes through the side wall of the dredging sleeve 4, and is sealed and slidably connected to the dredging sleeve 4, and both ends of the dredging sleeve 4 are fixedly connected to the discharge pipe 3, so that a closed cavity is formed between the discharge pipe 3 and the dredging sleeve 4, and the dredging sleeve 4 can slide up and down relative to the discharge component 2; the switching component 5 is placed on the inner side of the discharge pipe 3, for switching the gas to enter between the discharge pipe 3 and the dredging sleeve 4, and the end of the discharge pipe 3 close to the switching component 5 is connected to the air pump. The air pump is a prior art and will not be described in detail here. When in use, the air pump is electrically connected to the corresponding controller and power supply, and the output end of the air pump is connected to the switching component 5, so that air can be discharged through the discharge pipe 3; by adjusting the wind pressure output by the air pump, the material delivery amount can be adjusted. The bellows 6 is connected to the end of the discharge pipe 3 away from the switching assembly 5; the fixing frame 7, the end of the bellows 6 is fixedly connected to the lower end of the fixing frame 7, and the upper end of the fixing frame 7 is fixedly connected to the output pipe 71, and the bellows 6 is connected to the output pipe 71; the air guide hole 10 is opened at the end of the discharge pipe 3 close to the pressure relief pipe 9, and can only pass through gas. A filter layer is provided in the air guide hole 10 to ensure that the powder cannot pass through the air guide hole 10 into the space between the discharge pipe 3 and the dredging sleeve 4. The filter layer is not shown in the figure.

[0032] It should be noted that during the working process, the powder is discharged from the discharge pipe 3 under the influence of the air output by the air pump, and enters the output pipe 71 at the upper end of the fixed frame 7 through the bellows 6, and is then discharged. The output pipe 71 is connected to the subsequent process as needed.

[0033] Specifically, it also includes a clearing component 8, which is fixedly connected to the lower end of the fixed frame 7 and is used to clear the bellows 6. The clearing component 8 includes a fixed cylinder 81, which is fixedly connected to the lower end of the fixed frame 7; a vibration ring 82, which is arranged at one end of the fixed cylinder 81 and can slide back and forth relative to the fixed cylinder 81. The vibration ring 82 is sleeved on the outside of the bellows 6. During use, the vibration ring 82 slides back and forth relative to the fixed cylinder 81, causing the bellows 6 to swing repeatedly, clearing the blocked part inside the bellows 6, and preventing the bellows 6 from being blocked and causing the equipment to fail to operate; a pressure relief pipe 9, the middle of which passes through the fixed cylinder 81 and is connected to the fixed cylinder 81, and the lower end of the pressure relief pipe 9 is connected to the clearing sleeve 4.

[0034] It should be noted that one side of the fixing frame 7 is in the shape of a plate, which serves to strengthen the strength of the fixing frame 7, and a hole is opened in the plate-shaped portion, so that the fixing frame 7 can be fixed in an appropriate position by screws as needed.

[0035] More specifically, the discharge pipe 3 includes a rectangular section 31 and a cylindrical section 32. The cylindrical sections 32 are placed at both ends of the rectangular section 31. A transition section 33 is connected between each cylindrical section 32 and the rectangular section 31. The transition section 33 is made of a tough material so that the rectangular section 31 can swing slightly relative to the cylindrical section 32. A plurality of vibrating reeds 34 are fixedly connected to the outside of the rectangular section 31. The vibrating reed 34 is placed between the rectangular section 31 and the dredging sleeve 4. The vibrating reed 34 does not contact the dredging sleeve 4. When the airflow passes through the vibrating reed 34, it will cause the vibrating reed 34 to swing.

[0036] It should be noted that when the gas flows through the gap between the discharge pipe 3 and the dredging sleeve 4, the airflow passes through the vibrating reed 34, causing it to vibrate irregularly and causing the rectangular section 31 to vibrate. At this time, the powder blocked in the rectangular section 31 can be vibrated, and the rectangular section 31 can be dredged, so that the airflow can drive the powder to continue moving.

[0037] Specifically, the switching assembly 5 includes a conical air ring 51 and an air outlet 52. The conical air ring 51 can close the air outlet 52. The side of the conical air ring 51 close to the air pump is conical in structure, and a through hole is opened in the middle; it also includes a limiting ring 53, which is fixedly connected to the inner side of the cylindrical section 32 away from the side of the bellows 6. The limiting ring 53 has a ring-shaped structure, and a plurality of notches are opened on its inner side, and does not block the cylindrical section 32; a reset member 54, which is fixed on one side of the limiting ring 53, and the other end contacts the conical air ring 51. The reset member 54 can be a spring or other structure that can achieve self-recovery; the air outlet 52 is placed between the limiting ring 53 and the conical air ring 51, and the air outlet 52 passes through the side wall of the corresponding cylindrical section 32.

[0038] It should be noted that, during operation, the air pump delivers gas into the cylindrical section 32, and the airflow pushes the conical air ring 51 to slide toward the side close to the limiting ring 53. At the same time, the outer side of the conical air ring 51 blocks the air outlet 52, and the airflow enters the rectangular section 31 through the holes inside the conical air ring 51 and the limiting ring 53, and causes the powder falling from the discharge pipe 21 to be transported to the bellows 6 along with the airflow, as shown in FIG. Figure 4 (b) state; when the rectangular section 31 is blocked, the gas in the rectangular section 31 cannot continue to flow. At this time, the air pressure in the rectangular section 31 and the cylindrical section 32 corresponding to the switching component 5 are the same, and the reset member 54 pushes the conical air ring 51 to reset. At this time, the air hole is opened, as shown in FIG. Figure 4 In the middle (a) state, the gas enters between the discharge pipe 3 and the dredging sleeve 4 through the air hole, then enters from the cylindrical section 32 on the other side, and continues to flow into the bellows 6 to prevent the airflow from disappearing and causing the powder in the bellows 6 to fall and cause blockage. At the same time, part of the gas still enters the rectangular section 31 through the holes on the inner side of the conical air ring 51 and the limit ring 53. When the airflow flows between the discharge pipe 3 and the dredging sleeve 4, it pushes the vibrating reed 34 to vibrate, and dredges the blocked position in the rectangular section 31. When the rectangular section 31 is dredged, the airflow can enter the corresponding cylindrical section 32 and the bellows 6 through the rectangular section 31. After that, the conical air ring 51 is affected by the airflow and slides again to the side close to the limit ring 53, and blocks the air outlet 52.

[0039] More specifically, the dredging assembly 8 also includes a sliding plate 83, which is slidably connected to the inner side of the fixed cylinder 81, and the sliding plate 83 slides sealingly relative to the inner side of the fixed cylinder 81; a connecting rod 84, an end of which passes through the side wall of the fixed cylinder 81 and is fixedly connected to the vibration ring 82, and the other end of the connecting rod 84 is fixedly connected to the sliding plate 83; a reset spring 85, which is sleeved on the outer side of the connecting rod 84, one end of the reset spring 85 is fixedly connected to the side wall of the fixed cylinder 81, and the other end of the reset spring 85 contacts the sliding plate 83; the pressure relief pipe 9 is connected to the side of the fixed cylinder 81 away from the connecting rod 84.

[0040] Specifically, it also includes a solenoid valve 11, which is fixedly connected to the upper end of the fixing frame 7, and its input end is connected to the end of the pressure relief pipe 9, and the output end of the solenoid valve 11 is connected to the output pipe 71. The solenoid valve 11 is a prior art and will not be described in detail here. During use, the solenoid valve 11 is electrically connected to the corresponding controller and power supply.

[0041] It should be noted that during use, the solenoid valve 11 is closed, and the gas enters the fixed cylinder 81 through the pressure relief pipe 9, causing the sliding plate 83 to slide toward the side close to the reset spring 85. At the same time, the middle part of the bellows 6 is moved through the connecting rod 84 and the vibration ring 82. Then the solenoid valve 11 is controlled to be turned on, and the gas enters the output pipe 71 through the solenoid valve 11 and is discharged. At this time, the pressure in the fixed cylinder 81 disappears, and the reset spring 85 pushes the sliding plate 83 to reset. At the same time, the connecting rod 84 resets the bellows 6 synchronously through the vibration ring 82. By repeatedly opening and closing the solenoid valve 11, the bellows 6 can be pushed to bend repeatedly, thereby clearing the blockage inside the bellows 6.

[0042] More specifically, it also includes a hanger 12, which is fixedly connected to the two ends of the dredging sleeve 4; an adjusting screw 13, which is rotatably connected to the middle part of the frame 1, and the lower end of each adjusting screw 13 is threadedly engaged with the corresponding hanger 12. When in use, the dredging sleeve 4 can be manually rotated to drive the discharge pipe 3 to slide up and down, thereby adjusting the relative height between the discharge pipe 3 and the discharge pipe 21.

[0043] It should be noted that when the height of the lower feeding pipe 21 relative to the bottom inner side of the rectangular section 31 is greater, more powder discharged from the lower feeding pipe 21 enters the rectangular section 31, and the powder conveying efficiency is higher. On the contrary, when the height of the lower feeding pipe 21 relative to the bottom inner side of the rectangular section 31 is smaller, less powder discharged from the lower feeding pipe 21 enters the rectangular section 31, and the powder conveying efficiency is lower. A higher output efficiency is more likely to cause blockage. Therefore, the height of the lower feeding pipe 21 relative to the rectangular section 31 can be adjusted according to the particle size of the powder to ensure stable conveying while maintaining a higher output efficiency.

[0044] Specifically, the end of each cylindrical section 32 is fixedly connected to an arc tube 14, the end of the arc tube 14 close to the side of the bellows 6 is fixedly connected to the first flange 15, and the arc tube 14 on the other side is connected to the output pipe 71 of the air pump. The setting of the arc tube 14 makes the air pump connection easier to operate.

[0045] More specifically, the two ends of the bellows 6 are respectively fixedly connected with a second flange 16. The second flange 16 at the lower end of the bellows 6 is connected to the first flange 15 by bolts. A sealing gasket is placed between the first flange 15 and the second flange 16 as needed to improve the sealing of the connection between the bellows 6 and the discharge pipe 3. The second flange 16 at the upper end of the bellows 6 is fixed to the fixing frame 7 by bolts and is also installed with a sealing gasket to prevent the bellows 6 from aging and damage after long-term use, which may cause leakage of powder. The setting of the second flange 16 makes it easier to replace the bellows 6.

[0046] Specifically, a closing sleeve 17 is mounted on the outer side of the discharge pipe 21, and the other end of the closing sleeve 17 is fixedly connected to the unblocking sleeve 4. The closing sleeve 17 is made of flexible material. During use, the vibration of the rectangular section 31 can drive the discharge pipe 21 to synchronously generate a small amplitude vibration, and unblock the inner side of the discharge pipe 21 at the same time. The setting of the closing sleeve 17 makes it easier for the discharge pipe 21 to follow the vibration of the rectangular section 31.

[0047] In summary, when the device is conveying powder, the powder to be conveyed is introduced into the hopper 22, so that the powder enters the discharge pipe 21 through the discharge pipe 21, and then the output end of the air pump is connected to the corresponding arc tube 14. At this time, the airflow pushes the conical air ring 51 to slide toward the side close to the limit ring 53, and the outer side of the conical air ring 51 blocks the air outlet 52. The airflow enters the rectangular section 31, and the powder falling in the discharge pipe 21 follows the airflow to be conveyed to the corrugated pipe 6, and then the powder follows into the output pipe 71 and is discharged into the equipment of the subsequent process.

[0048] When the discharge pipe 3 is blocked, the gas in the rectangular section 31 cannot continue to flow, and the air pressure on the left and right sides of the conical air ring 51 is the same. The reset member 54 pushes the conical air ring 51 to reset. At this time, the air hole is opened, and the gas enters between the discharge pipe 3 and the dredging sleeve 4 through the air hole. At this time, the solenoid valve 11 is closed, and then the gas enters from the cylindrical section 32 on the other side through the air guide hole 10 and continues to flow into the bellows 6 to prevent the air flow from disappearing and causing the powder in the bellows 6 to fall and cause blockage. The gas passes through the discharge pipe 3 and the dredging sleeve 4. When passing through the sleeve 4, the vibrating reed 34 is pushed to vibrate, thereby clearing the blocked position in the rectangular section 31. At the same time, part of the gas still enters the rectangular section 31 through the holes on the inner side of the conical air ring 51 and the limit ring 53, so that a certain pressure is maintained in the rectangular section 31. When the rectangular section 31 is cleared due to the influence of vibration and air pressure, the air flow passes through the holes on the inner side of the conical air ring 51, and the reset part 54 is compressed and deformed again. The conical air ring 51 blocks the air outlet 52 again, and the equipment returns to normal working state.

[0049] When the bellows 6 is blocked, the air flow in the discharge pipe 3 cannot continue to pass through. At this time, the air pressure on the left and right sides of the conical air ring 51 is the same, and the conical air ring 51 slides to the side away from the limit ring 53, so that the air outlet 52 is opened. At the same time, the gas enters between the discharge pipe 3 and the dredging sleeve 4 and enters the fixed cylinder 81 through the pressure relief pipe 9. When the solenoid valve 11 is closed, the gas enters the fixed cylinder 81 through the pressure relief pipe 9, causing the sliding plate 83 to slide to the side close to the return spring 85, and the middle part of the bellows 6 is moved to one side through the connecting rod 84 and the vibration ring 82. Then the solenoid valve 11 is controlled to be opened, and the gas enters through the solenoid valve 11. The air enters and exits the discharge pipe 71 and is discharged, causing the pressure in the fixed cylinder 81 to disappear, and the reset spring 85 pushes the sliding plate 83 to reset. At the same time, the connecting rod 84 resets the bellows 6 synchronously through the vibration ring 82. The solenoid valve 11 is repeatedly switched on and off to make the bellows 6 bend repeatedly to clear the blockage inside the bellows 6. At this time, part of the gas still enters the discharge pipe 3 through the holes on the inner side of the conical air ring 51 and the limit ring 53, so that a certain pressure is maintained in the bellows 6. When the bellows 6 is cleared due to repeated bending and the influence of air pressure, the air flow passes through the conical air ring 51 to block the air outlet 52 again, and the equipment returns to normal working state.

[0050] When the discharge pipe 3 and the bellows 6 are blocked at the same time, the conical air ring 51 moves to open the air outlet 52. At this time, the gas enters between the discharge pipe 3 and the dredging sleeve 4. At the same time, the bellows 6 is dredged through repeated conduction of the solenoid valve 11. After the bellows 6 is dredged, the solenoid valve 11 can be kept in the open state to accelerate the airflow between the discharge pipe 3 and the dredging sleeve 4, thereby enhancing the vibration effect of the rectangular section 31 and dredging the discharge pipe 3. When the discharge pipe 3 and the bellows 6 are completely dredged, the solenoid valve 11 is closed to restore the equipment to normal working state.

[0051] When the equipment is frequently blocked, manually turn the adjusting screw 13 to adjust the relative height between the discharge pipe 3 and the lower feed pipe 21. When the lower feed pipe 21 is smaller than the bottom height inside the rectangular section 31, less powder discharged from the lower feed pipe 21 enters the rectangular section 31, and the powder conveying efficiency is lower. At the same time, the output efficiency of the air pump is kept constant, reducing the probability of equipment blockage.

[0052] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-regulating powder material flow adapter device based on unpowered pneumatic conveying, comprising a frame (1), characterized in that: It also includes a blanking assembly (2), the lower end of which is connected to a blanking pipe (21); A discharge pipe (3) fixedly connected to the inner side of the frame (1), and the middle portion of which is in communication with the discharge pipe (21); A dredging sleeve (4) is sleeved on the outside of the discharge pipe (3); the discharge pipe (21) passes through the side wall of the dredging sleeve (4) and is sealingly and slidably connected to the dredging sleeve (4); the dredging sleeve (4) can slide up and down relative to the discharge assembly (2); a switching assembly (5) disposed inside the discharge pipe (3); an end of the discharge pipe (3) close to the switching assembly (5) is connected to the air pump; the switching assembly (5) comprises a conical air ring (51) and an air outlet (52); the conical air ring (51) is capable of closing the air outlet (52); a bellows (6) connected to an end of the discharge pipe (3) away from the switching assembly (5); A fixing frame (7), the upper end of the fixing frame (7) is fixedly connected to an output pipe (71), and the bellows (6) is in communication with the output pipe (71); A dredging assembly (8), the dredging assembly (8) comprising a fixed cylinder (81) fixedly connected to the lower end of the fixed frame (7); a vibration ring (82) disposed at one end of the fixed cylinder (81) and capable of reciprocatingly sliding relative to the fixed cylinder (81), the vibration ring (82) being sleeved on the outer side of the bellows (6); A pressure relief pipe (9), the middle of which passes through the fixed cylinder (81) and is in communication with the fixed cylinder (81), and the lower end of the pressure relief pipe (9) is in communication with the dredging sleeve (4); An air guide hole (10) is provided at one end of the discharge pipe (3) close to the pressure relief pipe (9).

2. The self-adjusting powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: The discharge pipe (3) comprises a rectangular section (31) and a cylindrical section (32), wherein the cylindrical sections (32) are placed at both ends of the rectangular section (31), a transition section (33) is connected between each cylindrical section (32) and the rectangular section (31), and a plurality of vibrating reeds (34) are fixedly connected to the outer side of the rectangular section (31).

3. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 2 is characterized in that: The switching assembly (5) further includes a limiting ring (53) fixedly connected to the inner side of the cylindrical section (32) on a side away from the bellows (6); a reset member (54), which is fixed on one side of the limiting ring (53) and has the other end in contact with the conical air ring (51); The air outlet hole (52) is placed between the limiting ring (53) and the conical air ring (51), and the air outlet hole (52) passes through the side wall of the corresponding cylindrical section (32).

4. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: The dredging assembly (8) further includes a sliding plate (83) which is slidably connected to the inner side of the fixed cylinder (81); A connecting rod (84), an end of which passes through the side wall of the fixed cylinder (81) and is fixedly connected to the vibration ring (82), and the other end of the connecting rod (84) is fixedly connected to the sliding plate (83); a return spring (85) which is sleeved on the outside of the connecting rod (84), one end of the return spring (85) being fixedly connected to the side wall of the fixed cylinder (81); The pressure relief pipe (9) is connected to a side of the fixed cylinder (81) away from the connecting rod (84).

5. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: It also includes a solenoid valve (11), which is fixedly connected to the upper end of the fixing frame (7), the input end of which is connected to the end of the pressure relief pipe (9), and the output end of the solenoid valve (11) is connected to the output pipe (71).

6. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: It also includes a hanger (12) fixedly connected to both ends of the dredging sleeve (4); An adjusting screw (13) is rotatably connected to the middle portion of the frame (1), and the lower end of each adjusting screw (13) is threadedly engaged with the corresponding hanger (12).

7. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 2 is characterized in that: The end of each cylindrical section (32) is fixedly connected to an arc-shaped tube (14), and the end of the arc-shaped tube (14) close to the side of the corrugated tube (6) is fixedly connected to a first flange (15).

8. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 7 is characterized in that: The two ends of the bellows (6) are respectively fixedly connected with second flanges (16), and the second flange (16) at the lower end of the bellows (6) is connected to the first flange (15) by bolts.

9. The self-regulating powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: The unloading assembly (2) comprises a hopper (22), the outer side of which is fixedly connected to the inner side of the frame (1), and the hopper (22) has a conical structure; The discharge pipe (21) is fixedly connected to the lower end of the hopper (22).

10. The self-adjusting powder material flow adapter device based on unpowered pneumatic conveying according to claim 1 is characterized in that: A sealing sleeve (17) is sleeved on the outer side of the discharge pipe (21), and the other end of the sealing sleeve (17) is fixedly connected to the dredging sleeve (4).

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