A powder degassing device

Abstract

The application relates to a powder degassing device and belongs to the technical field of powder material packaging, which comprises a degassing sleeve, a flange plate, an outer sleeve shell and a blowing pipe one and a variable pitch mechanism. The application has the effects of improving filling quality and stopping material without valves. The inner wall of the degassing sleeve is divided into an upper filter layer and a lower filter layer, the inner side of the upper filter layer is provided with spiral guide plates, the inner bottom end of the degassing sleeve is provided with a closing ring and a material blocking ring, the variable pitch mechanism comprises a fixing ring, a connecting sleeve, a mounting ring, a screw rod and blades, the blades are designed to be variable-pitch, the pitch gradually decreases from top to bottom, the upper filter layer and the lower filter layer are independently controlled to suck air, the variable-pitch blades gradually compress the separated gas, when the material is stopped, the lower filter layer is used to suck air under high negative pressure, the powder is compacted through the closing ring to form a material plug to realize valve-free stopping, the application integrates sectional degassing and valve-free stopping, the filling density is obviously improved, maintenance is convenient, and the application is suitable for ton bag packaging of powder materials.

Description

Technical Field

[0001] This application relates to the technical field of powder material packaging, and in particular to a powder degassing device. Background Technology

[0002] Degassing devices for powdered materials are widely used in the ton bag packaging process in industries such as chemical, food, and pharmaceutical. Their main function is to remove air trapped between powder particles, thereby increasing the loose density of the material and the filling capacity of a single bag.

[0003] Currently, the industry commonly uses methods such as vibration compaction and mechanical pressurization to increase filling density. Some equipment, combined with a filter and air extraction structure, can achieve degassing and densification of powder to a certain extent.

[0004] However, existing degassing methods have obvious drawbacks. Vibration and mechanical pressurization methods are inefficient and energy-intensive, and result in complex overall equipment structures that are difficult to adapt to continuous automated production lines. Filter-type degassing devices are mostly single-layer structures, resulting in uneven degassing. Furthermore, the material discharge stop relies on an independent valve, which is prone to seal failure due to powder wear, leading to high maintenance costs and making it difficult to meet the high-efficiency production requirements of modern powder packaging. Summary of the Invention

[0005] The purpose of this application is to provide a powder degassing device to solve the problems in the background art mentioned above.

[0006] The powder degassing device provided in this application adopts the following technical solution: it includes a degassing sleeve, the top of the degassing sleeve is provided with a flange, a set of outer shells are provided on the outside of the degassing sleeve, a set of air blowing pipes are provided at both the left and right ends of the outer shells, and a set of pitch changing mechanism is provided inside the degassing sleeve.

[0007] The upper end of the inner wall of the degassing sleeve is an upper filter layer, the lower end of the upper filter layer is provided with a lower filter layer, and the inner side of the upper filter layer is provided with a guide plate. The bottom inner side of the degassing sleeve is provided with a set of closing rings, and the inner side of the closing rings is provided with no less than two sets of material blocking rings.

[0008] By adopting the above technical solution, the outer shell combined with the air blowing pipe can inflate the ton bag, the degassing sleeve combined with the upper and lower filter layers realizes two-stage segmented degassing, the guide plate guides the airflow to be evenly distributed, avoiding strong air at the upper end and weak air at the lower end, and the closing ring and the material blocking ring work together to compact the powder at the outlet to form a dense material plug, realizing valve-free material shut-off.

[0009] Preferably, the outer side of the degassing sleeve is provided with no less than two sets of air blowing pipes II corresponding to the position of the lower filter layer, and the outer side of the degassing sleeve is provided with no less than two sets of air blowing pipes III and IV corresponding to the position of the upper filter layer.

[0010] By adopting the above technical solution, the second, third and fourth air blowing pipes can control the air extraction and backflushing operations of the lower filter layer and the upper filter layer respectively. When feeding material quickly, the degassing efficiency is improved by air extraction. During the cut-off stage, the lower filter layer is extracted to form a material block. During backflushing, it can also be cleaned in sections without interfering with each other.

[0011] Preferably, the pitch-changing mechanism includes a fixed ring, a connecting sleeve, a mounting ring, a screw, and blades. The top inner side of the degassing sleeve is provided with a set of fixed rings, and the inner side of the fixed ring is connected to a set of mounting rings through the connecting sleeve. The inner end of the mounting ring is provided with a set of screws, and the bottom outer end of the screws is connected to blades.

[0012] By adopting the above technical solution, the variable pitch mechanism forms a support frame through a fixed ring, a connecting sleeve, and an installation ring, and the screw is coaxially suspended in the center of the degassing sleeve. The blades rotate with the screw to transport materials, realizing continuous spiral feeding of powder. At the same time, it works with the sleeve filter layer to complete synchronous degassing during the conveying process.

[0013] Preferably, the inner side of the fixing ring is provided with no less than two sets of slots at equal intervals, each slot is provided with a set of inner slots, each slot is provided with a set of insert plates, and the top surface of the insert plates is connected to a set of cover plates.

[0014] By adopting the above technical solution, the slot and the inner card slot cooperate with the insert plate to form a quick-connect structure. The cover plate covers the top opening of the slot, so that the pitch mechanism can be installed and removed as a whole. The screw assembly can be taken out for maintenance or replacement without disassembling the sleeve body, which greatly shortens the maintenance time.

[0015] Preferably, one end of the connecting sleeve is connected to the mounting ring, and the other end is connected to the insert plate. A set of fixing arms is provided at the end of the connecting sleeve near the insert plate. A set of connecting arms is connected at the end of the fixing arms away from the insert plate. The other end of the connecting arms extends through into the mounting ring and is connected to a set of linkage rods. A set of springs is sleeved on the outside of the connecting arms.

[0016] By adopting the above technical solution, the fixed arm, connecting arm and spring form an elastic telescopic structure, and the linkage rod is used to transmit adjustment actions and to enhance the connection stability between the mounting ring and the fixed ring.

[0017] Preferably, the inner end of each mounting ring is provided with a guide groove corresponding to the connecting arm and the linkage rod. The outer end of the top surface of the mounting ring is circumferentially arranged with at least two sets of fixing grooves. The inner end of the top surface of the mounting ring is provided with a set of annular grooves. A set of telescopic sleeves is provided in the annular grooves. A set of rotating plates is connected to the top of the telescopic sleeves. The outer end of the bottom of the rotating plates is circumferentially arranged with at least two sets of fixing members. At least two sets of linkage grooves are provided between the fixing members and the telescopic sleeves.

[0018] By adopting the above technical solution, the guide groove provides a moving guide for the connecting arm. When the rotating plate rotates along the annular groove, it drives the linkage rod to move radially through the linkage groove, thereby driving the connecting arm to move synchronously. The fixing part is locked into the fixing groove to achieve the gear position locking. The telescopic sleeve supports the lifting and lowering of the rotating plate, forming a purely mechanical radial adjustment and locking structure.

[0019] Preferably, the top end of the linkage rod extends through into the linkage groove.

[0020] By adopting the above technical solution, the top of the linkage rod is embedded in the linkage groove, so that the rotational motion of the rotating plate can be converted into the radial displacement of the linkage rod, realizing the synchronous driving of multiple sets of connecting arms extension and retraction by a single component, and the adjustment operation is centralized and unified, without the need for individual adjustment.

[0021] Preferably, the blades are designed with a variable pitch, with the spacing gradually decreasing from top to bottom.

[0022] By adopting the above technical solution, the volume of the powder gradually shrinks during the conveying process, forming a smooth and gradual compression. The released gas is continuously discharged through the filter layer, avoiding powder agglomeration caused by sudden pressure, while protecting the integrity of the particle morphology.

[0023] Preferably, the cover plate completely covers the top opening of the slot.

[0024] By adopting the above technical solution, the cover plate can effectively prevent falling powder from entering the gap between the slot and the insert plate, causing the insert plate to become stuck when plugged in or out, thus ensuring that the quick-release structure remains smooth even after long-term use.

[0025] Preferably, the mounting ring is connected to the screw via a bearing.

[0026] By adopting the above technical solutions, the bearing can effectively reduce the operating resistance and wear of the screw, making the variable pitch conveyor run more smoothly and supporting the long-term stable operation of the screw.

[0027] In summary, this application includes at least one of the following beneficial technical effects of a powder degassing device:

[0028] 1. This application forms a synergistic degassing and shut-off mechanism by setting an upper and lower filter layer on the inner wall of the degassing sleeve, as well as a closing ring and a material blocking ring at the bottom of the degassing sleeve. Compared with the single-layer filter structure in the prior art, the independent air paths of the upper and lower filter layers can realize two-stage segmented degassing. The guide plate at the inner end of the upper filter layer guides the airflow spiral downward to solve the problem of uneven axial airflow and realize uniform degassing of materials. During the shut-off stage, the lower filter layer is separately subjected to high negative pressure suction. Combined with the conical extrusion of the closing ring and the increased resistance of the material blocking ring, the powder at the outlet forms a dense material plug. The material can be shut off without additional valves. The structure is simple and the sealing is reliable.

[0029] 2. This application utilizes a variable pitch mechanism installed within the degassing sleeve. The variable pitch mechanism includes a fixed ring, a connecting sleeve, an mounting ring, a screw, and blades. The blades are designed with variable pitch and form a collaborative conveying and degassing mechanism with the upper and lower filter layers of the degassing sleeve. The blade pitch gradually decreases from top to bottom, and the material volume gradually shrinks during the screw conveying process, achieving smooth and gradual compression and avoiding sudden compression and agglomeration. The compressed and precipitated gas is simultaneously discharged through the upper and lower filter layers, achieving simultaneous conveying and degassing. Compared with the traditional split structure of conveying first and then compacting, the degassing efficiency is higher, the integrity of the material particle morphology is better, and the loose density is increased more significantly.

[0030] 3. This application utilizes a slot and inner groove on the fixed ring, a fixed arm and spring inside the connecting sleeve, and a rotating plate and linkage rod on the mounting ring to form a coordinated quick-release locking mechanism. Compared to the traditional fixed screw installation structure, the insertion plate and slot cooperation enables the overall plug-in and plug-out disassembly of the pitch-changing mechanism. The rotation of the rotating plate drives the linkage rod and connecting arm to extend and retract synchronously through the linkage groove, causing the fixed arm to engage in the inner groove to complete the locking. The spring provides the reset tension force, and the fixed part and the fixed groove prevent rotation of the gear position. Disassembly and assembly do not require disassembling the sleeve body, greatly improving maintenance efficiency and ensuring a stable and reliable connection. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this application;

[0032] Figure 2 This is a front view schematic diagram of the internal structure of the degassing sleeve in this application;

[0033] Figure 3 This is a schematic diagram of the internal structure of the upper filter layer in this application;

[0034] Figure 4 yes Figure 2 A magnified view of part A in the middle;

[0035] Figure 5 This is a top view schematic diagram of the variable pitch mechanism of this application;

[0036] Figure 6 yes Figure 5 A magnified view of part B in the middle section;

[0037] Figure 7 This is a top view of the connecting sleeve and mounting ring structure of this application;

[0038] Figure 8 This is a schematic diagram of the rotating plate bottom surface from below in this application;

[0039] Explanation of reference numerals in the attached drawings: 1. Degassing sleeve; 2. Flange; 3. Outer shell; 4. Air blowing pipe one; 5. Variable pitch mechanism; 101. Upper filter layer; 102. Lower filter layer; 103. Guide plate; 104. Closing ring; 105. Material blocking ring; 11. Air blowing pipe two; 12. Air blowing pipe three; 13. Air blowing pipe four; 51. Fixing ring; 52. Connecting sleeve; 53. Mounting ring; 54. Screw; 55. Blade; 511. Slot; 512. Inner groove; 513. Insert plate; 514. Cover plate; 521. Fixing arm; 522. Connecting arm; 523. Linkage rod; 524. Spring; 531. Guide groove; 532. Fixing groove; 533. Ring groove; 534. Telescopic sleeve; 535. Rotating plate; 536. Fixing component; 537. Linkage groove. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application will be described in further detail below.

[0041] A powder degassing device, as described above Figures 1-4 The system includes a degassing sleeve 1, with a flange 2 at the top to fix its position. An outer shell 3 is fitted around the outer side of the degassing sleeve 1, with a set of air-blowing pipes 4 at both ends. During bagging, the lower opening of the outer shell 3 extends into the top opening of the ton bag, and air is blown through the air-blowing pipes 4 to achieve bag expansion and dust removal. A variable-pitch mechanism 5 is installed inside the degassing sleeve 1. The upper end of the inner wall of the degassing sleeve 1 is an upper filter layer 101, and the lower end of the upper filter layer 101 is a lower filter layer 102. A set of guide plates 103 are spirally arranged inside the upper filter layer 101. The flow plate 103 can guide the suction airflow to be evenly distributed in the upper filter layer 101 along the spiral path, so that the gas in each section of the upper filter layer 101 is uniform. A set of closing rings 104 are installed at the bottom of the inner side of the degassing sleeve 1. The closing rings 104 are tapered structures that are wider at the top and narrower at the bottom. There are no less than two sets of material blocking rings 105 on the inner side of the closing rings 104. When the lower filter layer 102 is subjected to high negative pressure suction, the powder is radially compacted in the closing rings 104 and axially squeezed by the tapered surface. The resulting material plug has a higher density and more reliable sealing. It is not easy to collapse due to the weight of the material. It can significantly improve the reliability of valveless shut-off and is suitable for fine powders with better flowability.

[0042] Specifically, the outer shell 3, together with the air blowing pipe 4, can inflate the ton bag. The degassing sleeve 1, together with the upper filter layer 101 and the lower filter layer 102, realizes two-stage segmented degassing. The guide plate 103 guides the airflow to be evenly distributed, avoiding strong air at the top and weak air at the bottom. The closing ring 104 and the material blocking ring 105 work together to compact the powder at the outlet to form a dense material plug, realizing valve-free material shut-off.

[0043] Reference Figure 2The outer side of the degassing sleeve 1 is provided with no less than two sets of air blowing pipes 11 corresponding to the lower filter layer 102. The other end of the air blowing pipes 11 is connected to the external gas through a pipe to facilitate the gas extraction and blowing operations. The outer side of the degassing sleeve 1 is provided with no less than two sets of air blowing pipes 12 and 13 corresponding to the upper filter layer 101, which is beneficial for blowing and extracting gas from the upper filter layer 101.

[0044] Specifically, the second air pipe 11, the third air pipe 12 and the fourth air pipe 13 can control the air extraction and backflushing operations of the lower filter layer 102 and the upper filter layer 101 respectively. When feeding material quickly, the degassing efficiency is improved by air extraction. During the cut-off stage, the lower filter layer 102 is formed by air extraction to form a material block. During backflushing, it can also be cleaned in sections without interfering with each other.

[0045] Reference Figure 2 and Figure 5 The variable pitch mechanism 5 includes a fixed ring 51, a connecting sleeve 52, a mounting ring 53, a screw 54, and blades 55. A set of fixed rings 51 are fixedly connected to the top inner side of the degassing sleeve 1. A set of mounting rings 53 are connected to the inner side of the fixed rings 51 through the connecting sleeve 52. A set of screws 54 are connected to the inner end of the mounting rings 53 through a bearing. Blades 55 are connected to the bottom outer end of the screws 54. The blades 55 are designed with variable pitch, and the distance between them gradually decreases from top to bottom, so that the volume of the powder gradually shrinks during the conveying process, forming a smooth and gradual compression. The gas released continuously passes through the filter layer and is discharged, avoiding the agglomeration of powder caused by sudden pressure, while protecting the integrity of the particle morphology.

[0046] Specifically, the variable pitch mechanism 5 forms a support frame through the fixed ring 51, the connecting sleeve 52 and the mounting ring 53, and the screw 54 is coaxially suspended in the center of the degassing sleeve 1. The bearing can effectively reduce the operating resistance and wear of the screw 54, making the variable pitch conveying operation more stable and supporting the long-term stable operation of the screw 54. The blades 55 rotate with the screw 54 to convey materials, realizing continuous spiral feeding of powder. At the same time, it works with the sleeve filter layer to complete synchronous degassing during the conveying process.

[0047] Reference Figures 5-6 Four sets of slots 511 are equally spaced on the inner side of the fixing ring 51. Each slot 511 has an inner slot 512 on the side near the degassing sleeve 1. A set of insert plates 513 are installed in the slot 511. The side of the insert plate 513 away from the inner slot 512 is connected to the connecting sleeve 52. The insert plate 513 can be plugged and unplugged into the slot 511 through the connecting sleeve 52. A set of cover plates 514 are connected to the top surface of the insert plate 513. The cover plates 514 completely cover the top opening of the slot 511, which can effectively prevent the falling powder from entering the gap between the slot 511 and the insert plate 513, causing the insert plate 513 to be stuck when plugged and unplugged, ensuring that the quick-release structure remains smooth after long-term use.

[0048] Specifically, the slot 511 and the inner slot 512 work together with the insert plate 513 to form a quick-connect structure. The cover plate 514 covers the top opening of the slot 511, so that the pitch mechanism 5 can be installed and removed as a whole. The screw assembly can be taken out for maintenance or replacement without disassembling the sleeve body, which greatly shortens the maintenance time.

[0049] Reference Figure 6 and Figure 7 One end of the connecting sleeve 52 is connected to the mounting ring 53, and the other end is connected to the insert plate 513. A set of fixing arms 521 is provided at the end of the connecting sleeve 52 near the insert plate 513. A set of connecting arms 522 is connected at the end of the fixing arms 521 away from the insert plate 513. The other end of the connecting arms 522 extends through into the mounting ring 53 and is connected to a set of linkage rods 523. A set of springs 524 is sleeved on the outside of the connecting arms 522. The two ends of the springs 524 are connected to the fixing arms 521 and the inner end face of the connecting sleeve 52, respectively. They can drive the fixing arms 521, which have retracted into the connecting sleeve 52, to pop out and reset, and insert into the inner slot 512 to enhance the connection stability between the fixing ring 51 and the connecting sleeve 52.

[0050] Specifically, the fixed arm 521, the connecting arm 522 and the spring 524 form an elastic telescopic structure, and the linkage rod 523 is used to transmit adjustment actions and to enhance the connection stability between the mounting ring 53 and the fixed ring 51.

[0051] Reference Figure 7 and Figure 8 Each mounting ring 53 has a guide groove 531 at its inner end corresponding to the connecting arm 522 and the linkage rod 523. The outer end of the top surface of the mounting ring 53 has at least two sets of fixing grooves 532 arranged in a circumferential pattern. The inner end of the top surface of the mounting ring 53 has a set of annular grooves 533, within which a set of telescopic sleeves 534 are installed. A set of rotating plates 535 is rotatably connected to the top of the telescopic sleeves 534. The rotating plates 535 can move up and down at the top of the mounting ring 53 via the telescopic sleeves 534. The outer end of the bottom of the rotating plates 535 has a circumferential pattern... There are at least two sets of fixing members 536. When the rotating plate 535 is attached to the top surface of the mounting ring 53, the fixing members 536 are inserted into the fixing groove 532 to achieve a fixing effect and prevent the rotating plate 535 from rotating accidentally. There are at least two sets of linkage grooves 537 between the fixing members 536 and the telescopic sleeve 534. The top end of the linkage rod 523 extends through into the linkage groove 537, which can convert the rotational motion of the rotating plate 535 into the radial displacement of the fixed arm 521, so as to realize the synchronous extension and retraction of the fixed arm 521.

[0052] Specifically, the guide groove 531 provides a moving guide for the connecting arm 522. When the rotating plate 535 rotates along the annular groove 533, it drives the linkage rod 523 to move radially through the linkage groove 537, thereby driving the connecting arm 522 to move synchronously. The fixing piece 536 is inserted into the fixing groove 532 to achieve gear locking. The telescopic sleeve 534 supports the lifting and lowering of the rotating plate 535, forming a purely mechanical radial adjustment and locking structure.

[0053] This application provides a powder degassing device, which degasses in stages through an upper filter layer 101 and a lower filter layer 102, and uses a guide plate 103 to uniformly distribute axial airflow. Combined with a closing ring 104 and a material blocking ring 105 to compact the material plug, it can achieve uniform degassing and valve-free shut-off. The material is progressively compressed by blades 55 with variable pitch, and the gas released by the upper filter layer 101 and the lower filter layer 102 is discharged synchronously. The conveying and degassing are completed simultaneously, avoiding sudden compression and agglomeration, and the degassing efficiency is high. The slot 511 and the insert plate 513 enable quick insertion and disassembly. The rotating plate 535 is linked to the fixing arm 521 to lock into the inner slot 512. The variable pitch mechanism 5 can be disassembled and assembled as a whole without disassembling the sleeve, which is convenient for maintenance and has a stable connection.

Claims

1. A powder degassing device, characterized in that, It includes a degassing sleeve (1), the top of the degassing sleeve (1) is provided with a flange (2), a set of outer shells (3) are provided on the outside of the degassing sleeve (1), a set of air blowing pipes (4) are provided at both the left and right ends of the outer shells (3), and a set of pitch changing mechanism (5) is provided inside the degassing sleeve (1). The upper end of the inner wall of the degassing sleeve (1) is an upper filter layer (101), the lower end of the upper filter layer (101) is provided with a lower filter layer (102), and the inner side of the upper filter layer (101) is provided with a guide plate (103). The bottom end of the inner side of the degassing sleeve (1) is provided with a set of closing rings (104), and the inner side of the closing rings (104) is provided with no less than two sets of material blocking rings (105).

2. The powder degassing device according to claim 1, characterized in that, The outer side of the degassing sleeve (1) is provided with no less than two sets of air blowing pipes two (11) corresponding to the lower filter layer (102), and the outer side of the degassing sleeve (1) is provided with no less than two sets of air blowing pipes three (12) and air blowing pipes four (13) corresponding to the upper filter layer (101).

3. The powder degassing device according to claim 1, characterized in that, The variable pitch mechanism (5) includes a fixed ring (51), a connecting sleeve (52), a mounting ring (53), a screw (54), and a blade (55). The inner top of the degassing sleeve (1) is provided with a set of fixed rings (51). The inner side of the fixed ring (51) is connected to a set of mounting rings (53) through the connecting sleeve (52). The inner end of the mounting ring (53) is provided with a set of screws (54). The outer bottom end of the screw (54) is connected to a blade (55).

4. The powder degassing device according to claim 3, characterized in that, The inner side of the fixing ring (51) is provided with no less than two sets of slots (511) at equal intervals. Each slot (511) is provided with a set of inner slots (512). Each slot (511) is provided with a set of insert plates (513). The top surface of the insert plates (513) is connected to a set of cover plates (514).

5. A powder degassing device according to claim 4, characterized in that, One end of the connecting sleeve (52) is connected to the mounting ring (53), and the other end is connected to the insert plate (513). A set of fixing arms (521) is provided at one end of the connecting sleeve (52) near the insert plate (513). A set of connecting arms (522) is connected at one end of the fixing arm (521) away from the insert plate (513). The other end of the connecting arm (522) extends through into the mounting ring (53) and is connected to a set of linkage rods (523). A set of springs (524) is sleeved on the outside of the connecting arm (522).

6. A powder degassing device according to claim 5, characterized in that, The inner end of each mounting ring (53) is provided with a guide groove (531) corresponding to the connecting arm (522) and the linkage rod (523). The outer end of the top surface of the mounting ring (53) is circumferentially arranged with at least two sets of fixing grooves (532). The inner end of the top surface of the mounting ring (53) is provided with a set of annular grooves (533). A set of telescopic sleeves (534) is provided in the annular grooves (533). The top end of the telescopic sleeves (534) is connected to a set of rotating plates (535). The outer end of the bottom of the rotating plates (535) is circumferentially arranged with at least two sets of fixing members (536). At least two sets of linkage grooves (537) are provided between the fixing members (536) and the telescopic sleeves (534).

7. A powder degassing device according to claim 6, characterized in that, The top end of the linkage rod (523) extends through into the linkage groove (537).

8. A powder degassing device according to claim 3, characterized in that, The blade (55) is designed with a variable pitch, with the spacing gradually decreasing from top to bottom.

9. A powder degassing device according to claim 4, characterized in that, The cover plate (514) completely covers the top opening of the slot (511).

10. A powder degassing device according to claim 3, characterized in that, The mounting ring (53) is connected to the screw (54) via a bearing.

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