阅读说明：本技术 Pta装置氧化干燥机进料螺旋转子 (Feeding screw rotor of PTA device oxidation dryer ) 是由 刘义平 吴振兴 于家庄 刘贵银 于永惠 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种PTA装置氧化干燥机进料螺旋转子,属于化工设备技术领域。实心轴端部设有焊接凸台,内插管端部与所述焊接凸台焊接固定,外部加强管与内插管外壁贴合,所述外部加强管端部开有两圈塞焊孔,每圈包含六个塞焊孔,每圈的六个所述塞焊孔共面且均布在外部加强管管壁上,所述塞焊孔位于实心轴外周。本发明的有益效果是：延长了螺旋转子的使用寿命,减少了检修的人工及检修备件的费用,保证了生产的平稳。(The invention discloses a feeding spiral rotor of an oxidation drying machine of a PTA device, belonging to the technical field of chemical equipment. The solid shaft end is provided with a welding boss, the end part of the inner inserting tube is fixedly welded with the welding boss, the outer reinforcing tube is attached to the outer wall of the inner inserting tube, two circles of plug welding holes are formed in the end part of the outer reinforcing tube, each circle of plug welding holes comprises six plug welding holes, the six plug welding holes in each circle are coplanar and uniformly distributed on the wall of the outer reinforcing tube, and the plug welding holes are located on the periphery of the solid shaft. The invention has the beneficial effects that: the service life of the spiral rotor is prolonged, the manpower for maintenance and the cost for maintaining spare parts are reduced, and the production stability is ensured.)

1. A feeding screw rotor of an oxidation dryer of a PTA device is characterized in that a welding boss is arranged at the end part of a solid shaft (1), the end part of an inner insertion tube (3) is welded and fixed with the welding boss, an outer reinforcing tube (2) is attached to the outer wall of the inner insertion tube (3), the end part of the outer reinforcing tube (2) is provided with two circles of plug welding holes (5), each circle of plug welding holes comprises six plug welding holes (5), each circle of six plug welding holes (5) are coplanar and uniformly distributed on the tube wall of the outer reinforcing tube (2), the plug welding holes (5) are positioned at the periphery of the solid shaft (1), the outer reinforcing tube (2) is welded and fixed with the solid shaft (1) through the plug welding holes (5), the other end of the outer reinforcing tube (2) is provided with a screw shaft tube (4), welding grooves are arranged at the end parts of the outer reinforcing tube (2) and the screw shaft tube (4), and the outer reinforcing tube (2) and the screw shaft tube (4) are welded, the end part of the inner inserting tube (3) extends into the spiral shaft tube (4), the outer wall of the inner inserting tube (3) extending into the spiral shaft tube (4) is attached to the inner wall of the spiral shaft tube (4), and the outer reinforcing tube (2) and the outer wall of the spiral shaft tube (4) are fixed with a spiral belt.

2. PTA device oxidation dryer feeding screw rotor according to claim 1, characterized in that the solid shaft (1) is connected to a driving device.

3. The PTA device oxidation dryer feeding screw rotor of claim 1, wherein the weld bevel angle is 30 °.

4. The PTA device oxidation dryer feeding screw rotor of claim 1, wherein the outer reinforcing tube (2), inner insert tube (3), and screw shaft tube (4) are 2205 stainless steel.

5. The PTA device oxidation dryer feeding screw rotor of claim 1, wherein the outer reinforcement tube (2) is thicker than the helical shaft tube (4).

6. The PTA device oxidation dryer feeding screw rotor of claim 1, wherein two adjacent plug weld holes (5) are staggered.

7. The method of processing a feed screw rotor of a PTA device oxidation dryer of claim 1, comprising the steps of:

the method comprises the following steps: welding the end part of the inner inserting tube (3) on a welding boss of the solid shaft (1);

step two: the external reinforcing pipe (2) and the spiral shaft pipe (4) are fixed in a centering welding mode through a welding groove;

step three: heating the welded external reinforcing pipe (2) and the spiral shaft pipe (4);

step four: sleeving a heated external reinforcing pipe (2) and a spiral shaft pipe (4) on the periphery of the inner inserting pipe (3), wherein the end part of the external reinforcing pipe (2) is positioned on the solid shaft (1);

step five: the external reinforcing pipe (2) and the spiral shaft pipe (4) are tightly attached to the inner inserting pipe (3) after being cooled, and the external reinforcing pipe (2) is welded and fixed on the solid shaft (1) through the plug welding hole (5);

step six: and a spiral belt is welded on the outer walls of the external reinforcing pipe (2) and the spiral shaft pipe (4).

8. The processing method of the feeding screw rotor of the PTA device oxidation dryer as claimed in claim 7, wherein the outer reinforcement pipe (2) and the screw shaft pipe (4) are welded in a multi-layer way by a small current, the shaft bending degree is checked while welding to control the deformation amount of the outer hollow pipe, the welding seam is checked for PT after welding, and the wall thickness of the welding position is different and needs to be smoothly transited.

9. The processing method of feeding screw rotor of PTA device oxidation dryer in claim 7, wherein the heating temperature of the outer reinforced tube (2) and the screw shaft tube (4) is 520 + -10 deg.C and the temperature is kept for 1 hour.

Technical Field

The invention relates to a feeding screw rotor of an oxidation drying machine of a PTA device, belonging to the technical field of chemical equipment.

Background

The PTA device oxidation drying machine feeding screw rotor is ordinary screw rotor structure, and the rotor crackle appears easily in the use, causes the rotor unbalance, scrapes the wall, and the rotor fracture even needs to shut down and overhaul, has seriously influenced normal production work. The main reason for the cracks is that the conveyed materials are easy to be adhered to the wall, the materials are pushed into the feeding screw from a chimney above the feeding screw, a certain topographic height difference exists, the materials fall from the high altitude after being hung on the wall to a certain state, and finally directly fall onto the screw shaft, the screw shaft not only needs to bear a certain torque, but also needs to bear the impulse after the materials at the high altitude fall onto the surface, and stress concentration occurs at the connecting position of the solid shaft and the hollow shaft, so that the position is finally fractured.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide the feeding screw rotor of the PTA device oxidation drying machine, which increases the structural strength of the stress concentration part and prolongs the service life of the screw rotor.

The technical scheme of the invention is as follows: the feeding screw rotor of the oxidation dryer of the PTA device is provided with a welding boss at the end part of a solid shaft, the end part of an inner inserting tube is welded and fixed with the welding boss, an outer reinforcing tube is attached to the outer wall of the inner inserting tube, the end part of the external reinforcing pipe is provided with two circles of plug welding holes, each circle comprises six plug welding holes, the six plug welding holes of each circle are coplanar and are uniformly distributed on the pipe wall of the external reinforcing pipe, the plug welding holes are positioned on the periphery of the solid shaft, the external reinforcing pipe is welded and fixed with the solid shaft through the plug welding holes, the other end of the external reinforcing pipe is provided with a spiral shaft pipe, the end parts of the external reinforcing pipe and the spiral shaft pipe are both provided with welding grooves, the external reinforcing pipe and the spiral shaft pipe are welded and fixed through the welding grooves, the end part of the inner inserting tube extends into the spiral shaft tube, the outer wall of the inner inserting tube extending into the spiral shaft tube is attached to the inner wall of the spiral shaft tube, and the spiral belt is fixed on the outer wall of the external reinforcing tube and the outer wall of the spiral shaft tube.

The solid shaft is connected with a driving device.

The welding groove angle is 30 degrees.

The outer reinforcing tube, the inner insertion tube and the helical shaft tube are 2205 stainless steel.

The outer reinforcing tube is thicker than the helical shaft tube.

Two adjacent circles of plug welding holes are arranged in a staggered mode.

The invention also discloses a processing method of the feeding screw rotor of the oxidation dryer of the PTA device, which comprises the following steps:

the method comprises the following steps: welding the end part of the inner inserted pipe on a welding boss of the solid shaft;

step two: the external reinforcing pipe and the spiral shaft pipe are fixed in a centering welding mode through a welding groove;

step three: heating the welded external reinforcing pipe and the spiral shaft pipe;

step four: sleeving a heated external reinforcing pipe and a spiral shaft pipe on the periphery of the inner inserting pipe, wherein the end part of the external reinforcing pipe is positioned on the solid shaft;

step five: the external reinforcing pipe and the spiral shaft pipe are tightly attached to the inner inserting pipe after being cooled, and the external reinforcing pipe is welded and fixed on the solid shaft through the plug welding hole;

step six: and welding a spiral belt on the outer reinforcing pipe and the outer wall of the spiral shaft pipe.

The external reinforcing pipe and the spiral shaft pipe are welded in a small-current multilayer mode, the bending degree of the shaft is checked while welding, the deformation of the external hollow pipe is controlled, PT checking is carried out on a welding seam after welding, the wall thickness of the welding position is different, and smooth transition is needed.

The heating temperature of the external reinforced pipe and the spiral shaft pipe is 520 +/-10 ℃, and the heat preservation is carried out for 1 hour.

The invention has the beneficial effects that: the outer reinforcing pipe and the spiral shaft pipe are sleeved outside the inner inserting pipe, 2205 stainless steel is adopted, the mechanical property and the structural strength of a stress concentration part are improved, the tensile strength of the dual-phase steel 2205 is 710MPa, the yield strength is 470MPa, the service life of the spiral rotor is prolonged, the labor for maintenance and the cost for maintenance of spare parts are reduced, and the production stability is ensured.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

The reference numbers in the figures are as follows: 1. solid shaft, 2 external reinforcing tube, 3 internal inserting tube, 4 spiral shaft tube, 5 plug welding hole.

Detailed Description

The invention is further illustrated with reference to figure 1:

example 1

The feeding spiral rotor of the oxidation dryer of the PTA device is characterized in that a solid shaft 1 is connected with a driving device, a welding boss is arranged at the end part of the solid shaft 1, the end part of an inner insertion tube 3 is welded and fixed with the welding boss, an outer reinforcing tube 2 is attached to the outer wall of the inner insertion tube 3, the end part of the outer reinforcing tube 2 is provided with two circles of plug welding holes 5, each circle of plug welding holes 5 comprises six plug welding holes 5, each circle of six plug welding holes 5 are coplanar and uniformly distributed on the tube wall of the outer reinforcing tube 2, the plug welding holes 5 are positioned at the periphery of the solid shaft 1, the outer reinforcing tube 2 is welded and fixed with the solid shaft 1 through the plug welding holes 5, the other end of the outer reinforcing tube 2 is provided with a spiral shaft tube 4, the end parts of the outer reinforcing tube 2 and the spiral shaft tube 4 are both provided with welding grooves, the angle of the welding grooves is 30 degrees, the outer reinforcing tube 2 and, the outer wall of the inner inserting tube 3 extending into the spiral shaft tube 4 is attached to the inner wall of the spiral shaft tube 4, and the outer reinforcing tube 2 and the outer wall of the spiral shaft tube 4 are fixed with spiral belts.

The outer reinforcing tube 2, the inner insert tube 3, and the helical shaft tube 4 are 2205 stainless steel.

The outer reinforcing tube 2 has a thickness greater than the helical shaft tube 4.

Two adjacent circles of plug welding holes 5 are arranged in a staggered mode.

Example 2

The processing method of the feeding screw rotor of the oxidation dryer of the PTA device comprises the following steps:

the method comprises the following steps: welding the end part of the inner inserting tube 3 on a welding boss of the solid shaft 1;

step two: the external reinforcing pipe 2 and the spiral shaft pipe 4 are fixed in a centering welding mode through welding grooves, the length of the external reinforcing pipe 2 is 1500mm, the external reinforcing pipe 2 and the spiral shaft pipe 4 are welded in a low-current multilayer mode, the shaft bending degree is checked while welding to control the deformation amount of an external hollow pipe, a welding seam is subjected to PT checking after welding, the wall thickness of a welding position is different, and smooth transition is needed;

step three: heating the welded external reinforcing pipe 2 and the welded spiral shaft pipe 4, wherein the heating temperature of the external reinforcing pipe 2 and the spiral shaft pipe 4 is 520 +/-10 ℃, and preserving heat for 1 hour;

step four: sleeving the heated outer reinforcing tube 2 and the spiral shaft tube 4 on the periphery of the inner inserting tube 3, wherein the end part of the outer reinforcing tube 2 is positioned on the solid shaft 1;

step five: the external reinforcing pipe 2 and the spiral shaft pipe 4 are tightly attached to the inner inserting pipe 3 after being cooled, and the external reinforcing pipe 2 is welded and fixed on the solid shaft 1 through the plug welding hole 5;

step six: the spiral band is welded on the outer wall of the outer reinforcing pipe 2 and the spiral shaft pipe 4.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.