A powder feeding device with anti-piling and shaking
By introducing a servo motor-driven central shaft and vibration components into the crushing and feeding device, the problem of separate control for crushing and anti-accumulation was solved, realizing synchronous crushing and anti-accumulation of raw materials, and improving the continuity and efficiency of crushing work.
Patent Information
- Application Number
- CN202311776182.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2043-12-20
AI Technical Summary
Existing crushing and feeding devices require separate operation for crushing and anti-accumulation control, which can easily lead to material accumulation due to negligence, affecting the continuity of crushing work.
A crushing and feeding device was designed, comprising a platform, a servo motor, an adjustment component, a pushing component, crushing blades, and a shaking component. The servo motor drives the central shaft and crushing blades to rotate, and the design of the shaking component enables synchronous crushing of raw materials and prevents accumulation.
It achieves simultaneous crushing and anti-accumulation of raw materials, avoids material buildup, improves the continuity and efficiency of crushing work, and simplifies the operation process.
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Figure CN118108041B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of crushing and feeding, in particular to a crushing and feeding device with shaking and anti-accumulation. BACKGROUND
[0002] Nanotubes are 10,000 times thinner than human hair and 100 times harder than steel. It can withstand high temperatures of 6500°F (3593℃), and has excellent thermal conductivity. Nanotubes can be used as metal conductors, with much higher conductivity than gold, and as semiconductors necessary for manufacturing computer chips. Energy-saving crushing is required when preparing nanotubes to assist in the processing and molding of nanotubes.
[0003] For example, the utility model discloses a kind of crushing and feeding device with application number CN201821825905.2, including raw material tank, pulverizer, pulverizer motor, fan, fan motor, powder storage tank, and raw material tank is equipped with discharge port. The utility model has high crushing efficiency, effectively reduces the powder in the working environment, reduces the loss of raw materials, and protects the health of workers, but the crushing and feeding device crushing and anti-accumulation need to be controlled separately, and it is easy to cause material accumulation due to work negligence when anti-accumulation is not opened, which affects the operation of crushing work.
[0004] Therefore, in view of the above, the existing structure and defects are studied and improved, and a crushing and feeding device with shaking and anti-accumulation is proposed. SUMMARY
[0005] In view of the deficiencies of the prior art, the present application provides a crushing and feeding device with shaking and anti-accumulation, which solves the problems raised in the background art.
[0006] In order to achieve the above object, the present application is realized by the following technical scheme: A kind of powder feeding device with anti-accumulation of jitter, including platform and servo motor, the outer surface of the platform is provided with adjusting assembly for position adjustment, and adjusting assembly includes fixed plate, oil cylinder and adapter block, the outer surface of the fixed plate is provided with oil cylinder, and the output end of oil cylinder is installed with adapter block, the end of the adapter block is provided with first feeding cylinder, and the front side of first feeding cylinder is installed with feed inlet, the top of the first feeding cylinder is provided with auxiliary platform, and the outer surface of auxiliary platform is provided with second feeding cylinder, the first feeding cylinder and second feeding cylinder are all installed with pusher assembly for assisting feeding, and pusher assembly includes built-in plate, air rod and push plate, the outer surface of the built-in plate is provided with air rod, and the output end of air rod is installed with push plate, the left of the second feeding cylinder is provided with outer cylinder, and the inside of outer cylinder is installed with inner cylinder, the middle of the inner cylinder is installed with middle shaft, and the outer surface of middle shaft is provided with second crushing blade, the top of the middle shaft is installed with driving shaft, and the outer surface of driving shaft is provided with auxiliary assembly for assisting jitter, the servo motor is set to the top of driving shaft, the auxiliary assembly includes large gear, small gear, screw, link sleeve plate and jitter plate, and the outer surface of large gear is provided with small gear, the middle of small gear is installed with screw, and the outer thread of screw is installed with link sleeve plate, the outer surface of link sleeve plate is provided with jitter plate, the end of one side of the jitter plate is provided with collection frame, and the bottom of collection frame is provided with bottom spring, one side of the collection frame is installed with guide pipe, and the end of guide pipe is provided with discharge disc, the middle of discharge disc is installed with flow splitter, the outside of small gear is provided with top plate.
[0007] Further, the flow splitter is threadedly connected with the discharge disc, and the flow splitter has a tapered structure, and the bottom of the platform is provided with a support plate.
[0008] Further, the top of the collection frame is installed with a top cover, and the surface of the top cover is provided with a crushing motor, and the output end of the crushing motor is installed with a connecting shaft.
[0009] Further, the outer surface of the connecting shaft is provided with a first crushing blade, and the lower portion of the connecting shaft is installed with a filter screen.
[0010] Further, one side of the bottom of the collection frame is threadedly installed with a threaded cover, and the threaded cover is one-to-one corresponding with the collection frame.
[0011] Further, the left and right sides of the top plate are both installed with a stand column, and the stand column forms a fixed structure with the outer cylinder through bolts.
[0012] Further, the outer surface of the discharge disc is provided with a support column on both sides, and the outer side of the guide pipe is installed with a valve.
[0013] Further, the bottom spring is symmetrically arranged in two groups about the center of the collecting frame, and the bottom of the bottom spring is provided with a bottom plate.
[0014] Further, the collecting frame is annularly distributed about the center of the bottom plate, and the top of the collecting frame is clamped and connected with the top cover.
[0015] Further, the outer cylinder is in a hollow structure, and the diameter of the outer cylinder is greater than that of the inner cylinder.
[0016] The application provides a crushing feeding device with anti-piling shaking.
[0017] 1. The crushing feeding device with anti-piling shaking can move the first feeding cylinder and the second feeding cylinder connected therewith to one side through the design of the adjusting assembly, and the design of the pushing assembly in the first feeding cylinder and the second feeding cylinder facilitates the movement of the raw materials from bottom to top and left to right in the inner cylinder, the feeding amount can be conveniently controlled, and the crushing saturation caused by excessive crushing of the raw materials is avoided.
[0018] 2. The crushing feeding device with anti-piling shaking can drive the middle shaft and the second crushing blade in the inner cylinder to rotate through the design of the servo motor, the driving shaft and the auxiliary assembly, so as to crush the raw materials in the inner cylinder, and the design of the auxiliary assembly can continuously beat the collecting frame, so that the collecting frame is shaken by the design of the bottom spring, the accumulation of the crushed raw materials during filtering is avoided, the crushing and anti-piling of the raw materials are simultaneously performed, the staff only needs to open the crushing structure, the unified design makes the crushing and anti-piling structure more compact.
[0019] 3. The crushing feeding device with anti-piling shaking, the collecting frame is connected with the discharging disc through the guide pipe, the crushed raw materials can be dispersed and drained to the guide pipe through the flow dividing block of the conical structure in the discharging disc, and then transferred to the inside of the collecting frame through the guide pipe, and through the design of the collecting frame, more crushed raw materials can be accommodated, and the crushed raw materials can be classified and collected according to the size through the design of the filter screen with different diameters in the collecting frame. DETAILED DESCRIPTION
[0020] Figure 1 It is a whole local expansion structure schematic view of the crushing feeding device with anti-piling shaking.
[0021] Figure 2 It is a screw connection structure schematic view of the crushing feeding device with anti-piling shaking.
[0022] Figure 3 It is an outer cylinder overhead structure schematic view of the crushing feeding device with anti-piling shaking.
[0023] Figure 4 It is a collecting frame connection structure diagram of the present application of the powder crushing feeding device with anti-piling shaking;
[0024] Figure 5 It is a collecting frame cross-section structure diagram of the present application of the powder crushing feeding device with anti-piling shaking;
[0025] Figure 6 It is a first upper feeding cylinder and second upper feeding cylinder three-dimensional connection structure diagram of the present application of the powder crushing feeding device with anti-piling shaking.
[0026] In the figure: 1, platform; 2, support plate; 3, adjusting assembly; 301, fixed plate; 302, oil cylinder; 303, adapter block; 4, first upper feeding cylinder; 5, feeding port; 6, auxiliary platform; 7, second upper feeding cylinder; 8, outer cylinder; 9, inner cylinder; 10, top plate; 11, stand column; 12, discharging disc; 13, support column; 14, collecting frame; 15, threaded cap; 16, bottom plate; 17, auxiliary assembly; 1701, large gear; 1702, small gear; 1703, screw rod; 1704, adapter sleeve plate; 1705, shaking plate; 18, servo motor; 19, drive shaft; 20, top cover; 21, guide pipe; 22, valve; 23, shunt block; 24, crushing motor; 25, connecting shaft; 26, first crushing blade; 27, filter screen; 28, pushing assembly; 2801, built-in plate; 2802, air rod; 2803, push plate; 29, bottom spring; 30, central shaft; 31, second crushing blade. DETAILED DESCRIPTION
[0027] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.
[0028] As Figure 1 , Figure 3 and Figure 6As shown, the present application provides technical solutions: a kind of powder feeding device with anti-accumulation of jitter, including platform 1, support plate 2, adjusting assembly 3, fixed plate 301, oil cylinder 302, adapter block 303, first feeding cylinder 4, feed inlet 5, auxiliary platform 6, second feeding cylinder 7, outer cylinder 8, inner cylinder 9, top plate 10, stand 11, discharging disc 12, support column 13, collection frame 14, screw cap 15, bottom plate 16, auxiliary assembly 17, large gear 1701, pinion 1702, screw 1703, adapter sleeve plate 1704, jitter plate 1705, servo motor 18, drive shaft 19, top cover 20, guide pipe 21, valve 22, shunt block 23, crushing motor 24, connecting shaft 25, first crushing blade 26, filter screen 27, push assembly 28, built-in plate 2801, air rod 2802, push plate 2803, bottom spring 29, middle shaft 30 and second crushing blade 31, the outer surface of platform 1 is provided with adjusting assembly 3 for position adjustment, and adjusting assembly 3 includes fixed plate 301, oil cylinder 302 and adapter block 303, the outer surface of fixed plate 301 is provided with oil cylinder 302, and the output end of oil cylinder 302 is provided with adapter block 303, the end of adapter block 303 is provided with first feeding cylinder 4, and the front side of first feeding cylinder 4 is provided with feed inlet 5, the design of fixed plate 301 and oil cylinder 302 can drive the first feeding cylinder 4 connected with adapter block 303 to slide on the outer surface of platform 1, facilitate the material of second feeding cylinder 7 to be pushed into inner cylinder 9, the top of first feeding cylinder 4 is provided with auxiliary platform 6, and the outer surface of auxiliary platform 6 is provided with second feeding cylinder 7, first feeding cylinder 4 and second feeding cylinder 7 are both provided with push assembly 28 for auxiliary feeding, and push assembly 28 includes built-in plate 2801, air rod 2802 and push plate 2803, the outer surface of built-in plate 2801 is provided with air rod 2802, and the output end of air rod 2802 is provided with push plate 2803, through the design of feed inlet 5, raw materials can be placed into first feeding cylinder 4, then air rod 2802 in first feeding cylinder 4 can drive push plate 2803 to move up, so that raw materials can be transferred to the inside of second feeding cylinder 7, then air rod 2802 in second feeding cylinder 7 can drive push plate 2803 to move left, so that raw materials are pushed to the left side, and the design of fixed plate 301 and oil cylinder 302 can drive the first feeding cylinder 4 connected with adapter block 303 to slide on the outer surface of platform 1, facilitate the material of second feeding cylinder 7 to be pushed into inner cylinder 9.
[0029] As Figure 1 , Figure 2 and Figure 5As shown, the left side of the second feeding cylinder 7 is provided with an outer cylinder 8, and the inner cylinder 9 is installed in the inner cylinder 8, the outer cylinder 8 is a hollow structure, and the diameter of the outer cylinder 8 is larger than the diameter of the inner cylinder 9, the middle part of the inner cylinder 9 is provided with a middle shaft 30, and the outer surface of the middle shaft 30 is provided with a second crushing blade 31, the top of the middle shaft 30 is provided with a driving shaft 19, and the outer surface of the driving shaft 19 is provided with an auxiliary assembly 17 for assisting in shaking, the bottom spring 29 is symmetrically provided with two groups about the center of the collecting frame 14, and the bottom of the bottom spring 29 is provided with a bottom plate 16, the servo motor 18 is arranged on the top of the driving shaft 19, the auxiliary assembly 17 includes a large gear 1701, a small gear 1702, a screw 1703, a connecting sleeve plate 1704 and a shaking plate 1705, the outer surface of the large gear 1701 is provided with a small gear 1702, the middle part of the small gear 1702 is provided with a screw 1703, and the outer thread of the screw 1703 is provided with a connecting sleeve plate 1704, the outer surface of the connecting sleeve plate 1704 is provided with a shaking plate 1705, one side of the end of the shaking plate 1705 is provided with a collecting frame 14, and the bottom of the collecting frame 14 is provided with a bottom spring 29, the collecting frame 14 is annularly distributed about the center of the bottom plate 16, and the top of the collecting frame 14 is clamped and connected with the top cover 20, one side of the bottom of the collecting frame 14 is provided with a threaded cover 15, and the threaded cover 15 is one-to-one corresponding with the collecting frame 14, by rotating the threaded cover 15, the crushed material in the collecting frame 14 can be easily taken out, the top of the collecting frame 14 is provided with a top cover 20, and the surface of the top cover 20 is provided with a crushing motor 24, the output end of the crushing motor 24 is provided with a connecting shaft 25, the outer surface of the connecting shaft 25 is provided with a first crushing blade 26, and the lower part of the connecting shaft 25 is provided with a filter screen 27, the design of the crushing motor 24 can drive the connecting shaft 25 and the first crushing blade 26 to rotate, so as to crush the raw materials conveyed into the collecting frame 14 again, the filter screen 27 is fixed in the inner part of the collecting frame 14 by limiting with screws, the filter screen 27 can be replaced by opening the top cover 20, so as to control the size of the crushed raw materials collected in the collecting frame 14, the design of the servo motor 18 can drive the driving shaft 19, the large gear 1701 and the middle shaft 30 to rotate, the rotation of the large gear 1701 can drive the small gear 1702 meshing connected with it to rotate, so that the screw 1703 can rotate synchronously with the small gear 1702, and the connecting sleeve plate 1704 is threadedly connected with the screw 1703, so as to adjust the position of the connecting sleeve plate 1704 about the screw 1703 according to the amount of the collecting frame 14, and the adjusting is fixed by screws, the connecting sleeve plate 1704 is below the outer cylinder 8 after installation, the rotation of the screw 1703 can drive the shaking plate 1705 to rotate continuously, the shaking plate 1705 is made of hard rubber, so that the shaking plate 1705 can continuously hit the collecting frame 14, so that the collecting frame 14 produces greater shaking by the design of the bottom spring 29, avoids the accumulation of the crushed raw materials when filtering, and realizes the synchronous crushing and anti-accumulation of the raw materials,Avoid the staff only open broken structure, the central axis 30 and the drive shaft 19 are connected, so that the rotation of the drive shaft 19 can drive the central axis 30 and the second broken blade 31 synchronous rotation, realize the transfer to the inner cylinder 9 of the raw material broken.
[0030] As shown in Figure 4 The side of the collecting frame 14 is provided with a guide pipe 21, and the end of the guide pipe 21 is provided with a discharging disc 12. The outer surface of the discharging disc 12 is provided with a support column 13 on both sides. The outer side of the guide pipe 21 is provided with a valve 22. After the collecting frame 14 collects a certain amount, the guide pipe 21 is controlled to stop discharging into the collecting frame 14 by controlling the valve 22, so that the user can open the threaded cap 15 to take out the crushed material in the collecting frame 14. The middle of the discharging disc 12 is provided with a flow dividing block 23 which is threadedly connected with the discharging disc 12 and has a conical structure. The user can disassemble the flow dividing block 23 according to the use requirement. The bottom of the platform 1 is provided with a support plate 2. The outer side of the pinion 1702 is provided with a top plate 10. The left and right sides of the top plate 10 are provided with a stand column 11 which is fixed with the outer cylinder 8 by bolts. The stand column 11 is used to support the top plate 10. The collecting frame 14 is connected with the discharging disc 12 through the guide pipe 21. The broken raw material can be dispersed and drained into the guide pipe 21 by the conical flow dividing block 23 in the discharging disc 12, and then transferred to the inside of the collecting frame 14 through the guide pipe 21. Through the design of the collecting frame 14, more crushed raw materials can be accommodated, and the broken raw materials can be classified and collected according to the size by the filter screen 27 with different diameters in the collecting frame 14.
[0031] In summary, as shown in Figures 1-6As shown, the crushing feeding device with anti-accumulation jitter is used. The design of the feeding port 5 facilitates the placement of raw materials into the first feeding cylinder 4. Then the design of the air rod 2802 in the first feeding cylinder 4 drives the push plate 2803 to move upwards, so that the raw materials can be transferred to the inside of the second feeding cylinder 7. Then the design of the air rod 2802 in the second feeding cylinder 7 drives the push plate 2803 to move left, so that the raw materials are pushed to the left side. At the same time, the design of the fixed plate 301 and the oil cylinder 302 drives the first feeding cylinder 4 connected with the adapter block 303 to slide on the outer surface of the platform 1, facilitating the pushing of the materials in the second feeding cylinder 7 into the inner cylinder 9. Then the design of the servo motor 18 drives the drive shaft 19, the large gear 1701 and the middle shaft 30 to rotate. The rotation of the large gear 1701 drives the small gear 1702 connected with it to rotate, so that the screw rod 1703 can rotate synchronously with the small gear 1702. The adapter sleeve plate 1704 is threadedly connected with the screw rod 1703, facilitating the user to adjust the position of the adapter sleeve plate 1704 relative to the screw rod 1703 according to the amount of the collection frame 14. After adjustment, it is fixed by screw. The adapter sleeve plate 1704 is below the outer cylinder 8 after installation. The rotation of the screw rod 1703 drives the jitter plate 1705 to rotate continuously. The jitter plate 1705 is made of hard rubber, so that the jitter plate 1705 can continuously hit the collection frame 14, so that the collection frame 14 produces a large jitter by the design of the bottom spring 29, avoiding the accumulation of the raw materials after crushing when filtering, realizing the synchronous crushing and anti-accumulation of the raw materials, avoiding the opening of the crushing structure by the staff, connecting the middle shaft 30 with the drive shaft 19, so that the rotation of the drive shaft 19 can drive the middle shaft 30 and the second crushing blade 31 to rotate synchronously, realizing the crushing of the raw materials transferred into the inner cylinder 9. Then, after the collection frame 14 collects to a certain extent, the control valve 22 is controlled to make the guide pipe 21 not discharge into the collection frame 14, facilitating the user to open the threaded cap 15 to take out the crushed materials in the collection frame 14. The design of the crushing motor 24 drives the connecting shaft 25 and the first crushing blade 26 to rotate, facilitating the re-crushing of the raw materials transferred into the collection frame 14. The filter screen 27 is fixed in the inside of the collection frame 14 by screw limiting, which can be replaced by opening the top cover 20. Finally, the collection frame 14 is connected with the discharging disc 12 through the guide pipe 21. The crushed raw materials can be dispersed into the guide pipe 21 by the conical structure of the flow divider 23 in the discharging disc 12, and transferred into the inside of the collection frame 14 by the guide pipe 21. Through the design of the collection frame 14, it can accommodate more crushed raw materials, and at the same time, it can classify and collect according to the size of the crushed raw materials by using the filter screen 27 with different diameters in the collection frame 14. By rotating the threaded cap 15, the crushed materials in the collection frame 14 can be taken out.
[0032] The embodiments of the present application are presented by way of example and description, and are not intended to be exhaustive or to limit the application to the form disclosed. Many modifications and variations will be apparent to those skilled in the art. Embodiments are chosen and described in order to best explain the principles of the application and its practical application, and to thereby enable others skilled in the art to best utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated.
Claims
1. A comminuted material feeding device with anti-piling dithering, comprising a platform (1) and a servo motor (18), characterized in that: The outer surface of the platform (1) is provided with an adjusting assembly (3) for position adjustment, and the adjusting assembly (3) comprises a fixed plate (301), an oil cylinder (302) and an adapter block (303), the outer surface of the fixed plate (301) is provided with the oil cylinder (302), and the output end of the oil cylinder (302) is provided with the adapter block (303), the end of the adapter block (303) is provided with a first feeding cylinder (4), the front side of the first feeding cylinder (4) is provided with an inlet (5), the top of the first feeding cylinder (4) is provided with an auxiliary platform (6), and the outer surface of the auxiliary platform (6) is provided with a second feeding cylinder (7), the first The first feeding cylinder (4) and the second feeding cylinder (7) are provided with a pushing assembly (28) for assisting feeding, and the pushing assembly (28) comprises an inner plate (2801), an air rod (2802) and a push plate (2803), the outer surface of the inner plate (2801) is provided with the air rod (2802), and the output end of the air rod (2802) is provided with the push plate (2803), the left side of the second feeding cylinder (7) is provided with an outer cylinder (8), and the inner part of the outer cylinder (8) is provided with an inner cylinder (9), the middle part of the inner cylinder (9) is provided with a middle shaft (30), and the outer surface of the middle shaft (30) is provided with a second crushing blade (31), the top of the middle shaft (30) is provided with a driving shaft (19), and the outer surface of the driving shaft (19) is provided with an auxiliary assembly (17) for assisting shaking, the servo motor (18) is arranged at the top of the driving shaft (19), the auxiliary assembly (17) comprises a large gear (1701), a small gear (1702), a screw rod (1703), a connecting sleeve plate (1704) and a shaking plate (1705), the outer surface of the large gear (1701) is provided with the small gear (1702), the middle part of the small gear (1702) is provided with the screw rod (1703), and the outer thread of the screw rod (1703) is provided with the connecting sleeve plate (1704), the outer surface of the connecting sleeve plate (1704) is provided with the shaking plate (1705), the end of the shaking plate (1705) is provided with a collecting frame (14), and the bottom of the collecting frame (14) is provided with a bottom spring (29), the servo motor (18) can drive the driving shaft (19), the large gear (1701) and the middle shaft (30) to rotate, the rotation of the large gear (1701) can drive the small gear (1702) connected with it to rotate, so that the screw rod (1703) can rotate synchronously with the small gear (1702), and the connecting sleeve plate (1704) is threadedly connected with the screw rod (1703); one side of the collecting frame (14) is provided with a guide pipe (21), and the end of the guide pipe (21) is provided with a discharging disc (12), the middle part of the discharging disc (12) is provided with a flow dividing block (23), and the outside of the small gear (1702) is provided with a top plate (10).
2. A de-agglomerating and anti-piling pulverizing feeder according to claim 1, characterized in that: The shunt block (23) is threadedly connected with the discharging disc (12), and the shunt block (23) is in a conical structure; the bottom of the platform (1) is provided with a supporting plate (2).
3. A de-agglomerating air conveying device according to claim 1, wherein: The top of the collecting frame (14) is provided with a top cover (20), and the surface of the top cover (20) is provided with a crushing motor (24); the output end of the crushing motor (24) is provided with a connecting shaft (25).
4. A de-agglomerating air classifier mill according to claim 3, wherein: The outer surface of the connecting shaft (25) is provided with a first crushing blade (26), and the lower portion of the connecting shaft (25) is provided with a filter screen (27).
5. A de-agglomerating air classifier mill according to claim 1, wherein: The bottom of the collecting frame (14) is provided with a threaded cover (15) on one side, and the threaded cover (15) is in one-to-one correspondence with the collecting frame (14).
6. A de-agglomerating air classifier mill according to claim 1, wherein: The left and right sides of the top plate (10) are provided with stand columns (11), and the stand columns (11) are fixed to the outer cylinder (8) through bolts.
7. A de-agglomerating air classifier mill according to claim 1, wherein: The outer surface of the discharging disc (12) is provided with supporting columns (13) on both sides; the outer side of the guide pipe (21) is provided with a valve (22).
8. A de-agglomerating air classifier mill according to claim 1, wherein: The bottom of the bottom spring (29) is provided with two groups of bottom plates (16) symmetrically arranged about the center of the collecting frame (14).
9. A de-agglomerating air swept feed mill according to claim 8, wherein: The collecting frame (14) is arranged in a ring shape about the center of the bottom plate (16), and the top of the collecting frame (14) is clamped and connected with the top cover (20).
10. The de-agglomerating air conveying device of claim 1, wherein: The outer cylinder (8) is in a hollow structure, and the diameter of the outer cylinder (8) is greater than the diameter of the inner cylinder (9).
Citation Information
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