阅读说明：本技术 一种淋涂量可变的淋涂粉末均匀撒料轴 (Even material axle that spills of variable drenching of volume of drenching coating powder ) 是由 夏双林 周英 龚程 张军 于 2019-10-20 设计创作，主要内容包括：一种淋涂量可变的淋涂粉末均匀撒料轴,包括螺杆体(10)和厚度不同的多个套筒(20),所述螺杆体(10)表面设有螺棱(11)；所述套筒(20)包括套筒体(21)和同轴地一体连接在套筒体连接端的法兰部(22),套筒体(21)设有与螺棱(11)相同螺距(S)和螺旋升角(α)的,且贯通套筒体壁厚的螺旋通槽(23),螺旋通槽(23)螺旋延伸出套筒体的自由端；所述套筒(20)通过螺棱(11)伸入螺旋通槽(23)中而螺旋配合在螺杆体(10)外,使得螺旋通槽的空的部分成为粉末填槽(22)；所述淋涂量可变实现为,选择不同厚度的套筒与螺棱配合可得到粉末填槽(22)的不同深度。所述淋涂量可变的淋涂粉末均匀撒料轴,淋涂量可改变、均匀淋涂。(A spray coating powder uniform spreading shaft with variable spray coating amount comprises a screw rod body (10) and a plurality of sleeves (20) with different thicknesses, wherein screw ridges (11) are arranged on the surface of the screw rod body (10); the sleeve (20) comprises a sleeve body (21) and a flange part (22) coaxially and integrally connected to the connecting end of the sleeve body, the sleeve body (21) is provided with a spiral through groove (23) which has the same thread pitch (S) and helix angle (alpha) as the thread ridge (11) and penetrates through the wall thickness of the sleeve body, and the spiral through groove (23) spirally extends out of the free end of the sleeve body; the sleeve (20) extends into the spiral through groove (23) through the spiral ridge (11) and is spirally matched outside the screw body (10), so that the empty part of the spiral through groove becomes a powder filling groove (22); the flow coating amount can be changed by selecting sleeves with different thicknesses to match with the screw ridges so as to obtain different depths of the powder filling groove (22). The curtain coating powder with variable curtain coating amount uniformly scatters the material shaft, and the curtain coating amount can be changed and the curtain coating is uniform.)

1. The utility model provides a drench and scribble that variable drench of volume scribbles even spill material axle, spill the powder export top of material axle installation at the loading hopper and can make drench that is accomodate scribble powder (1) and evenly fall to rotatory major diameter steel pipe surface from spilling the material epaxial, a serial communication port, include

The screw rod comprises a screw rod body (10), wherein the surface of the screw rod body (10) is provided with a screw edge (11) with a fixed screw pitch (S) and a helix angle (alpha);

the sleeve (20) comprises a sleeve body (21), the sleeve body (21) is provided with a spiral through groove (23) which has the same thread pitch (S) and helix angle (alpha) as the thread ridge (11) and penetrates through the wall thickness of the sleeve body, and the spiral through groove (23) extends out of the free end of the sleeve body in a spiral manner;

the sleeve (20) extends into the spiral through groove (23) through the spiral ridge (11) and is spirally matched outside the screw body (10), so that the empty part of the spiral through groove becomes a powder filling groove (22);

the flow coating amount can be changed by selecting sleeves with different thicknesses to match with the screw ridges so as to obtain different depths of the powder filling groove (22).

2. Shower powder uniform spreading shaft with variable shower coating amount according to claim 1 wherein the wall thickness b of the sleeve (20)_nAnd (3) satisfying the arithmetic progression: b_n＝b₁N is a positive integer greater than or equal to 2, and d is the tolerance of the arithmetic progression; or 6 sleeves, the wall thickness b of the 6 sleeves 20_nSatisfying the fibonacci number series: 1mm, 2mm,3mm,5mm,8mm,13mm, n is 1,2,3,4,5, 6.

3. Shower powder uniform spreading shaft with variable shower coating amount according to claim 2 wherein the sleeve body (20) is further provided with a spiral groove (26), the spiral groove (26) having the same pitch (S) and helix angle (α) as the spiral through groove (23), the spiral groove (26) being provided on the outer cylindrical surface of the sleeve body with a half pitch (S) difference with respect to the spiral through groove (23).

4. The curtain coating powder uniform spreading shaft with the variable curtain coating amount according to claim 3, wherein two ends of the screw body are rotatably arranged on the bearing seat (13), the sleeve body further comprises a flange part (27) coaxially and integrally connected to one end of the sleeve body, an end face bearing (24) is arranged in the flange part (27), the screw body (10) comprises a top shoulder (12), the screw rib (11) is screwed into the spiral through groove (23) until the free end of the sleeve body (21) is jacked to the top shoulder (12), and the end face bearing (24) is rotatably supported on the bearing seat (13).

5. A flow coating powder uniform spreading shaft with variable flow coating amount according to claim 3, wherein the depth of said spiral groove (26) is the same as the depth of said powder filling groove (22).

6. The curtain coating powder uniform spreading shaft with the variable curtain coating amount according to claim 3, wherein the screw body (10) further comprises a cooling mechanism (30), the cooling mechanism (30) comprises a water cooling channel (31) and a water return pipe (32) which are arranged in the screw body (10), the water return pipe is fixed in the water channel (31) and is communicated with the water channel (31) through a water through hole (36), one end of the screw body is connected with a rotary joint (33), the rotary joint (33) is provided with a water inlet channel (34) and a water outlet channel (35), the water inlet channel (34) is communicated with the water cooling channel (31), and the water outlet channel (35) is communicated with the water return pipe (32).

7. The curtain coating powder uniform spreading shaft with variable curtain coating amount according to claim 3, wherein the sleeve (20) and the screw body (10) are respectively provided with a pin hole (14), and a positioning pin (15) is arranged in the pin hole (14).

8. The curtain coating powder uniform spreading shaft with variable curtain coating amount according to claim 3, wherein the surfaces of a plurality of sleeves (21) directly mark the depth of a powder filling groove (22) obtained after a sleeve body is rotationally matched with a screw ridge.

9. The curtain coating powder uniform spreading shaft with variable curtain coating amount according to claim 3, wherein the spiral through groove (23) comprises a spiral matching groove (23.1) and a spiral filling groove (23.2) which are communicated up and down, and the spiral filling groove 23.2 is an inverted trapezoidal cross section with a small inside and a large outside.

10. Shower powder uniform spreading shaft with variable shower amount according to claim 3 characterized in that the free end of the sleeve body (21) is provided with a reinforcement rib (25).

Technical Field

The invention belongs to the technical field of welded pipe powder spraying production, and particularly relates to a spraying powder uniform spreading shaft with variable spraying amount.

Background

The use of powder coatings as corrosion protection coatings for pipelines is currently considered to be an effective method and has been used in oil pipelines for many years in many countries in the united states of america and europe. The coating characteristics of the powder coating have three basic requirements: the coating has no pinholes, and the coating pinholes are a series of pinholes-like small holes formed on the surface of the coating, and are also called as miss coating points. Or micro-bubbles appear in the coating, and the micro-bubbles are broken to cause the thickness of the coating at the position to be extremely thin, and even small coating missing points appear. The existence of pinholes in the coating film not only affects the appearance quality of the product, but also seriously affects the mechanical and protective properties of the product, and the corrosion of the steel pipe is mostly extended from the beginning, thereby losing the use value of the powder coating. The pinhole can be detected by a pinhole detector (0-10000V), and no pinhole is indicated when no spark appears; secondly, the thickness of the coating is uniform and seamless, and a computer thickness gauge is used, so that the thickness fluctuation is required to be small, and the thickness of the normal coating is within 0.5-3 mm; ③ the adhesive force is more than 3kgf/cm, the width is 10mm, the peeling is carried out at 180 degrees, and the adhesive force is required to be 5-10 kgf/cm. Common powder coatings for the anticorrosive coating of the spiral steel pipe comprise polyethylene powder, epoxy resin powder and the like.

The spreading of the powder layer seems simple, but the technology for making a uniform and precisely controllable thickness over a large area and the devices for implementing it are not mature nor reported. The powder is characterized by poor fluidity and can not flow smoothly under the action of gravity or pressure; the powder can not transmit pressure, the local pressure causes local compression, a flow channel can be blocked, and the mass density of a powder layer is also uneven; powders, especially submicron powders, tend to agglomerate, and special measures are necessary to make the thickness of such powder layer uniform.

In a powder spreading device such as NIKKA in japanese, JP2012228639 a 20121122, which generally uses a rotating roller trough to spread powder particles, a spreading roller 22 is provided at a lower outlet of a powder staying trough 20, the spreading roller 22 is provided with a plurality of recesses 23 along the outer circumference, the spreading roller 22 rotates at a constant speed, and the powder in the recesses 23 is continuously spread. The concave part 23 separates the grooves, the gap of the grooves has the defect of uneven powder falling, the powder continuity can be ensured only by rotating the dispersion roller 22 at a higher speed of 500 plus 1000 rpm, thus the dispersion roller 22 is driven to rotate by a relatively higher power motor which is relatively more energy-consuming, and the spraying amount is difficult to control accurately.

The uniform spraying shaft of the spraying powder with variable spraying amount is urgently needed to be developed in the industry.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a curtain coating powder uniform spreading shaft with variable curtain coating amount.

The invention is realized in such a way that a spraying powder uniform spreading shaft with variable spraying amount is arranged above a powder outlet of a charging hopper, and the spreading shaft can enable the received spraying powder to uniformly fall onto the surface of a rotating large-diameter steel pipe from the spraying shaft

The surface of the screw body is provided with a screw edge with a fixed pitch and a helix angle;

the sleeve comprises a sleeve body and a flange part coaxially and integrally connected to the connecting end of the sleeve body, the sleeve body is provided with a spiral through groove which has the same pitch and helix angle with the helical ridge and runs through the wall thickness of the sleeve body, and the spiral through groove spirally extends out of the free end of the sleeve body;

the sleeve extends into the spiral through groove through the spiral edge and is spirally matched outside the screw rod body, so that the hollow part of the spiral through groove becomes a powder filling groove;

the variable flow coating amount is realized by selecting sleeves with different thicknesses to be matched with the screw edges to obtain different depths of the powder filling groove.

Further, the wall thickness b of the sleeve_nAnd (3) satisfying the arithmetic progression: b_n＝b₁N is a positive integer greater than or equal to 2, and d is the tolerance of the arithmetic progression; or 6 sleeves, the wall thickness b of the 6 sleeves 20_nSatisfying the fibonacci number series: 1mm, 2mm,3mm,5mm,8mm,13mm, n is 1,2,3,4,5, 6.

Further, the sleeve body is also provided with a spiral groove, the spiral groove and the spiral through groove have the same pitch and a spiral lead angle, and the spiral groove is arranged on the outer cylindrical surface of the sleeve body with a half pitch difference relative to the spiral through groove.

Further, the screw rod body both ends are rotatory to be set up on the bearing frame, and the cover barrel still includes the flange portion of a body coupling in its one end coaxially with it, establishes the terminal surface bearing in the flange portion, and the screw rod body is including the top shoulder, and when the free end of spiral arris screw in spiral logical groove up to the cover barrel pushed up the top shoulder, terminal surface bearing rotation support was on the bearing frame.

Further, the depth of the spiral groove is the same as the depth of the powder filling groove.

Further, the screw rod body still includes cooling body, cooling body is including setting up at the internal water-cooling passageway of screw rod and wet return, and the wet return is fixed in water channel and is passed through the water hole intercommunication with water channel, screw rod body one end connection rotary joint, and rotary joint is equipped with into water route and goes out the water route, it leads to water-cooling passageway to go into the water route, go out water route intercommunication wet return.

Furthermore, the sleeve and the screw rod body are respectively provided with a pin hole, and a positioning pin is arranged in the pin hole.

Furthermore, the depth of the powder filling groove obtained after the sleeve body is rotationally matched with the screw ridge is directly marked on the surfaces of the sleeves.

Further, the spiral through groove comprises a spiral matching groove and a spiral filling groove which are communicated up and down, and the spiral filling groove is an inverted trapezoidal cross section with a small inner part and a large outer part.

Furthermore, the free end of the sleeve body is provided with a reinforcing rib.

The variable drenching of drenching volume scribbles the powder and evenly spills the material axle, forms the different degree of depth that the groove was filled to the powder through the sleeve that thickness is different and the cooperation of spiral shell arris to it is adjustable to realize drenching volume, can guarantee through simple means, under the unchangeable prerequisite of steel pipe rotation speed and antedisplacement speed, the steel pipe drenching realizes drenching the production requirement of different thickness.

Drawings

FIG. 1 is a front cross-sectional view of a flow coating powder uniform spreading shaft with variable flow coating amount according to a first embodiment of the present invention.

FIG. 2 is an enlarged view I of FIG. 1 of a uniform spreading axis of a curtain coating powder with variable curtain coating amount according to the present invention.

FIG. 3 is a front cross-sectional view of a flow coating powder uniform spreading shaft with variable flow coating amount according to a second embodiment of the present invention.

FIG. 4 is an enlarged view II of FIG. 3 showing a uniform spreading axis of the flow coating powder with a variable flow coating amount according to the present invention.

Reference numerals in the above figures:

1 spray coating powder

10 screw rod bodies, 11 screw edges, 12 top shoulders, 13 bearing seats, 14 pin holes and 15 positioning pins

20 sleeve, 21 sleeve body, 22 powder filling groove, 23 spiral through groove, 24 end face bearing, 25 reinforcing rib, 26 spiral groove and 27 flange part

30 cooling mechanisms, 31 water cooling channels, 32 water return pipes, 33 rotating joints, 34 water inlet channels and 35 water outlet channels

23.1 spiral groove, 23.2 spiral groove filling

Detailed Description

The following detailed description of the embodiments of the present invention is provided in connection with the accompanying drawings, but is not intended to limit the scope of the invention.