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CN-122008078-A - Magnesium alloy polishing workbench using sine suction tube and polishing method

CN122008078ACN 122008078 ACN122008078 ACN 122008078ACN-122008078-A

Abstract

The invention relates to the technical field of magnesium powder explosion prevention and recovery, in particular to a magnesium alloy polishing workbench using a sine suction tube and a polishing method. The suction pipe body is in a stepped sinusoidal shape, the heights of the wave crests and wave troughs of the pipe body are sequentially increased along the air flow suction direction, the amplitude of the pipe body is gradually reduced, collecting branch pipes which can be opened and closed are arranged at the wave troughs of the pipe body, a dust collecting hopper, an L-shaped honeycomb duct, a negative pressure induced draft fan, a powder collecting compaction assembly and an intermittent ultrasonic vibrator are integrated on the matched magnesium alloy polishing workbench, and the requirements of the magnesium alloy polishing on flammable and explosive magnesium dust suction treatment are met. The multistage settlement of the dust with different particle diameters is realized by relying on an amplitude tapered structure, so that high settlement efficiency is ensured, pipeline resistance and equipment energy consumption are greatly reduced, multiple anti-blocking, full-flow explosion-proof design and dust compaction structures are matched, the risk of magnesium powder explosion is radically reduced, safe and efficient recovery of the magnesium dust is realized, the whole structure is concise, additional auxiliary parts are not needed, and the installation suitability is strong.

Inventors

  • CAO CHUNWEI
  • ZHU XUDONG
  • WANG YUN
  • JIANG HAN
  • WANG ZONGQI
  • CHEN CHAO
  • ZHOU JINLEI
  • JIN XING

Assignees

  • 安徽佳合朔科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260408

Claims (10)

  1. 1. A stepped sine suction pipe is used for dust suction and sedimentation separation and is characterized in that the whole pipe body is in a continuous sine curve shape, the heights of wave crests and wave troughs of the pipe body are sequentially increased along the air flow suction direction, the amplitude of the pipe body is gradually reduced, and an outlet of the pipe body is higher than an inlet, so that the whole pipe body is in a stepped tapered structure which climbs upwards.
  2. 2. A stepped sine suction pipe according to claim 1, characterized in that the respective troughs of the pipe body are provided with branches (41) for collecting and emptying, which branches are open and close.
  3. 3. A stepped sinusoidal suction pipe according to claim 1, characterized in that the lifting height h of the dust settled at the trough of the rising section of the current pipe body at this rising section is calculated as: ; Where k is an empirical factor, v is the average air flow rate in the stepped sinusoidal suction tube (40), D is the diameter of the stepped sinusoidal suction tube (40), κ is the curvature of the bend in the stepped sinusoidal suction tube (40), and D p is the average particle diameter of the dust settled at the current trough.
  4. 4. A magnesium alloy grinding workbench, which is characterized by comprising a grinding wheel grinding machine (11) arranged on a grinding table (10) and a dust collecting hopper (13) for receiving magnesium dust under grinding, wherein the outlet of the dust collecting hopper (13) is communicated with the inlet of a stepped sine-shaped suction pipe (40) according to any one of claims 1-3, a negative pressure induced draft fan (50) for providing negative pressure suction force is arranged at the outlet of the stepped sine-shaped suction pipe (40), and each branch pipe (41) in the stepped sine-shaped suction pipe (40) is communicated with a sealable dust collecting box (60) for collecting the magnesium dust.
  5. 5. A magnesium alloy polishing workbench according to claim 4, wherein each branch pipe (41) in the stepped sine-shaped suction pipe (40) is communicated with the same powder collecting box (60), a pressing block (71) is arranged in the powder collecting box (60) in a sliding manner, and the pressing block (71) pushes and compacts magnesium powder collected in the powder collecting box (60) to the other end in a piston motion mode.
  6. 6. The magnesium alloy polishing workbench according to claim 5, wherein the powder collecting box (60) is cuboid and fixed on the workbench, a telescopic rod (70) is fixedly arranged on the workbench beside the powder collecting box, the telescopic direction is parallel to the length direction of the powder collecting box (60), the telescopic end of the telescopic rod (70) is arranged in the powder collecting box (60) in a penetrating way in a sealing way, the pressing block (71) is fixed on the telescopic end, the end, opposite to the pressing block (71), of the powder collecting box (60) is an open end, and the open end is sealed with an openable end cover (61).
  7. 7. The magnesium alloy polishing workbench according to claim 4, wherein a concave anti-falling plate (12) is arranged at the inlet of the dust hopper (13), and a blanking hole for magnesium dust to fall down to the dust hopper (13) is formed in the anti-falling plate (12).
  8. 8. The magnesium alloy polishing table as set forth in claim 4, wherein the outlet of the dust hopper (13) is connected to a short pipe vertically disposed in the L-shaped pipe (20), the outlet of the long pipe horizontally disposed in the L-shaped pipe (20) is connected to a lower inclined pipe (90) inclined downward in the air flow direction, the outlet of the lower inclined pipe (90) is connected to the inlet of the stepped sine-shaped suction pipe (40), the outlet of the stepped sine-shaped suction pipe (40) is connected to an upper inclined pipe (80) inclined upward in the air flow direction, and the outlet of the upper inclined pipe (80) is connected to the suction port of the negative pressure induced draft fan (50).
  9. 9. A magnesium alloy polishing table according to claim 8, wherein the bottom of the dust hopper (13) is provided with an intermittent ultrasonic vibrator (30), and the ultrasonic emission end of the intermittent ultrasonic vibrator (30) is directed at the inlet of the L-shaped pipe (20).
  10. 10. A method for suction sedimentation and compaction recovery of magnesium dust, characterized in that a stepped sinusoidal suction pipe (40) according to any one of claims 1-3 is applied, and a magnesium alloy grinding table according to any one of claims 4-9, comprising the steps of: S1, starting a negative pressure induced draft fan (50), forming negative pressure air flow along the direction from a grinding table (10) to the negative pressure induced draft fan (50) in a dust hopper (13) and a stepped sine-shaped suction pipe (40), and simultaneously closing discharge ports of branch pipes (41) at all wave troughs of the stepped sine-shaped suction pipe (40); s2, grinding the magnesium alloy workpiece through a grinding wheel grinder (11), wherein the generated magnesium dust falls into a dust hopper (13) through a blanking hole of an anti-falling plate (12) under the action of gravity and negative pressure air flow, and then enters a stepped sine suction pipe (40) through an L-shaped pipe (20); S3, enabling the airflow containing the magnesium dust to flow along the continuous sinusoidal pipe body of the stepped sinusoidal suction pipe (40), enabling the magnesium dust to gradually settle to the wave trough of the pipe body due to inertia and gravity, and entering the corresponding branch pipe (41) to finish suction and classified settlement of the magnesium dust; S4, starting an intermittent ultrasonic vibrator (30) at the bottom of the dust hopper (13) in the polishing and sedimentation process of the steps S2-S3, and performing intermittent ultrasonic vibration on the inlet of the L-shaped pipe (20) to prevent magnesium dust from adhering to and blocking a pipeline; S5, when the magnesium dust collected in any branch pipe (41) reaches a preset amount, opening a discharge hole of the branch pipe (41) to enable the magnesium dust to fall into the dust collecting box (60), closing the discharge hole of the branch pipe (41), starting a telescopic rod (70), driving a pressing block (71) to do piston type reciprocating motion in the dust collecting box (60), and pushing and compacting the magnesium dust in the dust collecting box (60) towards the direction of the opening end; S6, after the magnesium dust is compacted into blocks, opening an end cover (61) at the opening end of the powder collecting box (60), pushing a pressing block (71) through a telescopic rod (70), pushing the compacted magnesium blocks out of the powder collecting box (60), closing the end cover (61), sequentially opening other non-unloading branch pipes (41) to finish grading compaction recovery of the magnesium dust, closing the end cover (61) and closing discharge ports of all the branch pipes (41) after recovery is finished, and continuing to collect the magnesium dust.

Description

Magnesium alloy polishing workbench using sine suction tube and polishing method Technical Field The invention relates to the technical field of magnesium powder explosion prevention and recovery, in particular to a magnesium alloy polishing workbench using a sine suction tube and a polishing method. Background The procedures of polishing, cutting and the like in industrial production can generate a large amount of suspension dust, so that the environment is polluted, the human health is endangered, inflammable and explosive dust such as magnesium powder is easy to cause explosion accidents due to the fact that the concentration exceeds the standard, the dry type dust collection system becomes a main flow mode for dust suction collection, and the bent pipe type sedimentation suction pipe is widely applied to pretreatment of the dust collection front end due to the simple structure. Most of the existing bent pipe type sedimentation suction pipes are of an equal-amplitude S-shaped, sine-shaped or continuous U-shaped structure, the bending amplitude of the pipe body is kept consistent along the suction direction, and some technical defects exist in practical application: Firstly, the contradiction between sedimentation efficiency and energy consumption is outstanding, increasing the amplitude to promote sedimentation effect can greatly increase pipeline resistance, improve the air pumping energy consumption, and decreasing the amplitude leads to the escape of small and medium particle dust, and the sedimentation efficiency is lower. Secondly, the dust classification sedimentation cannot be realized, the inertia difference of the dust with different particle diameters cannot be adapted, and the problems of large particle blocking and small particle escape are easy to occur. Thirdly, the aggregate structure is unreasonable in design, the normally open aggregate port is easy to cause negative pressure leakage, a single aggregate component cannot be collected in a grading manner, and dust secondary flying is easy to cause. In the prior art, although improvement is attempted by means of multistage equipment in series connection, additional guide plates and the like, the former greatly increases equipment cost and maintenance difficulty, dust leakage is easy to occur, and the latter further aggravates pipeline blockage and air flow resistance, so that the core problems cannot be fundamentally solved. Therefore, the bent pipe type sedimentation suction pipe which has a simple structure, does not need additional auxiliary components, can achieve both dust classification sedimentation efficiency and low energy consumption of the system, is adaptive to flammable and explosive dust operation scenes, and is a technical problem to be solved urgently in the field. Disclosure of Invention In order to solve the technical problem that the suction pipe of the equal-amplitude elbow is difficult to effectively stage and settle under low energy consumption, the invention provides a sine suction pipe with tapered amplitude. On the basis of a sine suction pipe, the invention provides a magnesium alloy polishing workbench, which aims to solve the technical problems that negative pressure air current leakage is easy to occur, dust cannot be collected in a grading manner and secondary flying is easy to occur due to unreasonable design of the collection structure of the suction pipe of the bent pipe. In order to achieve the above purpose, the present invention provides the following technical solutions: A stepped sine suction pipe is used for dust suction and sedimentation separation, the whole pipe body is in a continuous sine curve shape, the heights of wave crests and wave troughs of the pipe body are sequentially increased along the air flow suction direction, the amplitude of the pipe body is gradually reduced, and an outlet of the pipe body is higher than an inlet, so that the whole pipe body is in a stepped tapered structure capable of climbing upwards. As a further optimization of the scheme, branch pipes which are used for collecting materials and can open and close the materials are arranged at all trough positions of the pipe body in a communicated mode. As a further optimization of the scheme, the lifting height of the dust settled at the trough of the lifting section on the current pipe body at the lifting section is h, and the calculation formula of h is as follows: ; Where k is an empirical factor, v is the average air flow rate in the stepped sinusoidal suction tube, D is the diameter of the stepped sinusoidal suction tube, κ is the curvature of the bend in the stepped sinusoidal suction tube, and D p is the average particle diameter of the dust settled at the current trough. The scheme is further optimized, the magnesium powder collecting box comprises a grinding wheel grinding machine arranged on the grinding table, a dust collecting hopper used for receiving the ground magnesium powder, an outlet of the dust collectin