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Adhesion prevention powder spreading shaft

A technology for spreading shafts and powders, which is applied to devices and coatings that apply liquid to the surface, which can solve the problems of blanking blanks and uneven blanking.

Active Publication Date: 2020-02-07
许梦艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide an anti-adhesion powder spreading shaft to solve the problem of preventing the powder from falling in agglomerates or sticking in the roller groove, resulting in uneven blanking and neutral blanking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 , as shown in 2, an anti-adhesion powder coating shaft, the coating shaft is installed at the powder outlet of the hopper so that the received coating powder 1 falls evenly from the coating shaft to the surface of the rotating steel pipe,

[0044] Including the screw body 10, the surface of the screw body 10 is provided with a fixed pitch S, a spiral groove 11 with a helix angle α45°~60°, the groove width e of the spiral groove is 3~10mm, and the groove depth h0 is 3-15mm The spiral groove includes an elastic wall 12, which is the bottom wall of the spiral groove. Or there are a plurality of pits 13 in an array at intervals, and the pits 13 are in the shape of an inverted truncated cone with a small inside and a large outside, and the depth h0 of the pits is 3-15mm; the pits 13 include elastic walls 12, and the elastic walls 12 are concave. Pit bottom wall.

[0045] When the elastic wall 12 is greater than 100 Pa, the elastic deformation of the outward ...

Embodiment 2

[0053] The vibrating mechanism 30 is improved, and the other unexplained structures are the same as those in the first embodiment.

[0054] Such as image 3 As shown, an anti-adhesion powder coating shaft includes a pressure-reducing mechanism 300, and the pressure-reducing mechanism 300 includes a housing 312. The housing 312 includes a magnet cavity 313 and a sealing chamber 314, and also includes a magnetic pole plate 301, a magnetic pole The plate 301 and the magnet cavity 313 are coaxially arranged at intervals, the sleeve of the magnetic pole plate outside the magnet cavity is sleeved outside the sealing chamber 314, and the inductance coil 302 is wound outside the sleeve and the magnet cavity, and the inside of the magnet cavity 313 is opposite to the magnetic pole plate 301 A permanent magnet cladding body 303 is provided, and the permanent magnet cladding body includes a resin piston 311 and a permanent magnet 306. The S pole of the permanent magnet 306 abuts against ...

Embodiment 3

[0058] Such as Figure 5 , 6 As shown, the bulging vibration of the elastic wall 12 is improved to a tremor vibration driven by ultrasonic waves, the spiral groove is changed to an array of pits, and other structures are the same as in the first embodiment.

[0059] As shown in the figure, an anti-adhesion powder coating shaft,

[0060] Including a screw body 10, the surface of the screw body 10 has a plurality of pits 13 in an array at intervals, the pits are preferably in the shape of an inverted truncated cone with a small bottom and a big top, the bottom wall of the pit 13 is an elastic wall 12, and the elastic Wall 12 has a wall thickness of less than 1 mm.

[0061] Including an ultrasonic vibration mechanism 40 arranged in the water cooling channel 21, the ultrasonic vibration mechanism 40 is a ring piezoelectric vibrator, the outer surface of the ring piezoelectric vibrator emits ultrasonic waves in a 360-degree direction, and the ring piezoelectric vibrator includes ...

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Abstract

An adhesion prevention powder spreading shaft comprises a threaded rod body, a cooling mechanism and a pressure increase and decrease mechanism / ultrasonic vibration mechanism. A spiral groove is formed in the surface of the threaded rod body, or multiple pits are arrayed in the surface of the threaded rod body at intervals. The spiral groove or each pit comprises an elastic wall. The cooling mechanism comprises a water-cooling passageway arranged in the threaded rod body. The pressure increase and decrease mechanism is arranged on the end portion of the water-cooling passageway and communicates with a closed cavity. By means of the pressure increase and decrease mechanism, pressure in the closed cavity can be instantaneously increased or decreased, and the elastic wall / elastic walls can elastically deform along with pressure changes in the closed cavity. The elastic wall / elastic walls receives / receive ultrasonic waves emitted by the ultrasonic vibration mechanism and resonates / resonate. According to the adhesion prevention powder spreading shaft, powder does not adhere or cake in the spiral groove or the pits, the requirement for the powder humidity is lowered, and the adhesion prevention powder spreading shaft can be suitable for powder with smaller particle sizes.

Description

technical field [0001] The invention belongs to the technical field of powder spraying production of welded pipes, and in particular relates to an anti-adhesion powder spreading shaft. Background technique [0002] The use of powder coatings as a pipeline anti-corrosion coating is currently considered to be an effective method, and many countries in the United States and Europe have used it in oil pipelines for many years. There are four kinds of external coating methods in the prior art, well coating, electrostatic spray coating, fluidized bed dip coating and waterfall shower coating. The improvement of this application is waterfall coating. The waterfall coating method is suitable for large-diameter plastic-coated steel pipes above DN500. The steel pipe moves straight and rotates under the waterfall coating tank, and waterfall powder falls from the slit at the lower end of the coating tank. The powder melts on the outer surface of the rotating and preheated steel pipe un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05C19/04
CPCB05C19/04
Inventor 潘洪建
Owner 许梦艳
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