CN102234707A

CN102234707A - Support device for thermal treatment

Info

Publication number: CN102234707A
Application number: CN 201010164576
Authority: CN
Inventors: 魏仁军; 苌凤祥
Original assignee: China Petrochemical Corp; Sinopec Ningbo Engineering Co Ltd; Sinopec Ningbo Technology Research Institute
Current assignee: China Petrochemical Corp; Sinopec Ningbo Engineering Co Ltd; Sinopec Ningbo Technology Research Institute
Priority date: 2010-04-30
Filing date: 2010-04-30
Publication date: 2011-11-09
Anticipated expiration: 2030-04-30
Also published as: CN102234707B

Abstract

The invention relates to a support device for thermal treatment. The support device comprises cast steel which is arranged on a thermal treatment coil base and is used for supporting a workpiece to be treated. The support device is characterized in that the cast steel is also provided with a rolling device which is used for providing radial displacement on the workpiece to be treated. Through the rolling device, the sliding friction between the workpiece to be treated and the cast steel is turned to rolling friction, thereby reducing friction force and lowering the binding force of the cast steel on the workpiece to be treated due to thermal expansion and cool contraction in the thermal treatment process so as to reduce the deformation of the workpiece to be treated.

Description

Supporting device for heat treatment

Technical Field

The invention relates to the field of heat treatment of metal workpieces, in particular to a supporting device for heat treatment.

Background

When the tower body or the sectional barrel of the large pressure container is subjected to vertical heat treatment on a workpiece waiting for heat treatment, the tower body or the sectional barrel is usually directly placed on a plurality of cast steel blocks by a manufacturer, and the cast steel blocks are placed on a furnace platform in parallel and are uniformly arranged along the circumferential direction of the lower end of the tower body or the sectional barrel. As shown in FIG. 1, during the heat treatment, gas ejected from the nozzles is blown from the gaps of the cast steel blocks toward the workpiece to be treated. In the heat treatment process, the tower body or the sectional cylinder body can expand with heat and contract with cold, and the cast steel block arranged below the tower body or the sectional cylinder body has larger restraint degree and different sizes on the lower end of the tower body or the sectional cylinder body, so that the tower body or the sectional cylinder body can deform in the heat treatment process, the deformation is serious, and the workpiece to be treated needs to be scrapped.

Disclosure of Invention

The invention aims to solve the technical problem of providing a supporting device for heat treatment, which can effectively reduce the deformation of a workpiece to be treated in the heat treatment process, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the supporting device for heat treatment comprises a steel casting arranged on a heat treatment furnace platform and used for supporting a workpiece to be treated, and is characterized in that a rolling device capable of providing radial displacement for the workpiece to be treated is further arranged on the steel casting.

Through the rolling device, the sliding friction between the workpiece to be processed in the furnace and the cast steel block is changed into rolling friction, so that the friction force is reduced, the restraint force of the steel casting to the workpiece to be processed caused by expansion with heat and contraction with cold in the heat treatment process is reduced, and the deformation of the workpiece to be processed is effectively reduced.

The rolling device can comprise a box body, a rolling piece capable of rolling in the box body is placed in the box body, and a rolling plate which is used for placing the workpiece to be processed and can roll on the rolling piece and generate relative displacement with the box body is placed above the rolling piece.

The rolling elements can be spherical or columnar. Preferably, the rolling member may be a plurality of long cylindrical rods arranged in parallel.

The box body can be rectangular, the rolling members are arranged along the length direction of the box body, and the length of the rolling members is 15-30 mm smaller than that of the box body. Therefore, the direction of the box body can be conveniently adjusted, the roller in the box body is vertical to the radius of the tower body or the sectional barrel, the tower body or the sectional barrel can relatively and freely move along the radial direction in the heat treatment process, and the phenomenon that each supporting point is stressed unevenly is effectively solved.

In order to facilitate the placement of the workpiece to be processed, a rotating device capable of enabling the rolling device to rotate under the action of external force can be arranged between the rolling device and the steel casting.

The structure of the rotating device can be various, preferably, the rotating device can comprise a shaft arranged on the steel casting and a shaft hole which is arranged on the box body and can contain the shaft, and the box body can rotate around the shaft.

In order to facilitate the mounting of the support device for heat treatment, the shaft may be fixed to a transition piece, which is clamped to the steel casting. Therefore, after the transition piece is clamped on the steel casting, the supporting device for heat treatment declares that the installation is finished, and is very convenient to install.

The supporting device for heat treatment provided by the invention can be made of heat-resistant materials, and can be made of heat-resistant steel in general.

Compared with the prior art, the invention solves the deformation problem of the workpiece to be processed in the heat treatment process by arranging the rolling device, and greatly reduces the restraint degree between the workpiece to be processed and the cast steel block by changing the sliding friction in the prior art into the rolling friction; the rotation device can conveniently rotate the position of the support device for heat treatment, so that the rolling shaft of the support device is vertical to the radius of the workpiece to be treated, the workpiece to be treated can relatively and freely move along the radial direction in the heat treatment process, the problem of deformation of the workpiece to be treated caused by overlarge restraint force and inconsistent restraint force is effectively solved, the roundness of the port of the workpiece to be treated is ensured, and the repair phenomenon is effectively avoided.

Drawings

FIG. 1 is a schematic plan view of a heat treatment apparatus for a workpiece to be treated according to the background art of the present invention;

FIG. 2 is a perspective view of an exploded structure of an embodiment of the present invention;

FIG. 3 is a perspective view of an assembly structure according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic plan view of a heat treatment apparatus for a workpiece to be treated according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 2 to 5, the supporting device for heat treatment includes:

a plurality of steel castings 1 are arranged in parallel on a heat treatment furnace base (not shown).

The rotating device 2 comprises a transition piece 21 matched with the steel casting 1 and a shaft 22 fixed on the transition piece 21. The transition piece 21 has a flat plate portion 211 and two baffle portions 212, and the baffle portions 212 are welded to both sides of the flat plate portion 211. The distance between the two baffle parts in this embodiment is about 10mm larger than the upper surface of the steel casting 1. The spacing between baffle portions 212 is such that transition piece 21 slides smoothly over steel casting 1 after being placed on steel casting 1. In this embodiment, the flat plate portion 211 of the transition piece is provided with a circular hole, the shaft 22 is inserted into the circular hole, and then the flat plate portion 211 and the shaft 22 are welded together around the circular hole; the welding between the shaft 22 and the flat plate portion 211 requires no convex welding seam, and can be performed by adopting a lower surface countersunk welding mode. The transition piece 21 is directly clamped and sleeved on the steel casting 1 after the integral manufacture is finished.

The rolling device 3 comprises a box 31, a rolling member 32 and a rolling plate 33.

Wherein,

the box 31 has an upward opening, the box 31 in this embodiment is rectangular, a hole 311 matched with the shaft 22 is formed in the bottom surface of the box 31, and the shaft 22 can rotate in the hole 311. The diameter of the diametric shaft 22 of the hole 311 is usually about 2mm larger. The box body is designed to be rectangular, so that the direction of the rolling element in the box body can be conveniently known, and meanwhile, the size of the box body fully considers the displacement caused by expansion with heat and contraction with cold in the heat treatment process. The bottom plate of the box body and the inner side of the side plate are not suitable for welding, and generally, one-side welding is adopted at the outer side.

The rolling member 32 comprises 6 column-shaped long rods, is arranged in the box body 31 in parallel along the length direction of the box body 31 and can roll in the box body 31; and the length of the rolling member 32 is about 20 mm smaller than that of the box body, so that the rolling member 32 can roll smoothly, and the rolling member is prevented from being clamped by the side surface of the box body 31 in the heat treatment process. The rolling piece in this embodiment is made of round steel, and both ends are burr-free, and the diameter of the round steel is about phi 30 mm.

The rolling plate 33 is in a flat plate shape and is placed on the rolling members 32 without contacting the box body 31, so that the rolling plate 33 can generate relative displacement with the box body 31 along with the rolling of the rolling members 32. The rolling plate in this example is a steel plate having a thickness of 50 mm.

In the manufacturing of the above components, the embodiment is made of heat-resistant steel.

The supporting device for heat treatment is adopted to carry out heat treatment on the cylindrical equipment to be treated. The relative position of the device on the steel casting 1 is moved as a whole according to the diameter of the equipment to be treated, and simultaneously the device 3 is rolled, so that the rolling elements 32 are basically tangential to the contact point of the equipment to be treated. Through the supporting device, the sliding friction between the tower body or the sectional cylinder and the cast steel block is changed into rolling friction during the heat treatment in the furnace, so that the friction force is reduced, the restraint force caused by expansion with heat and contraction with cold in the heat treatment process of the tower body or the sectional cylinder is reduced, and the deformation of the tower body or the sectional cylinder is reduced. Meanwhile, the direction of the box body is adjusted to ensure that the rolling part in the box body is vertical to the radius of the equipment to be treated, so that the equipment to be treated can relatively and freely move along the radial direction in the heat treatment process, and the phenomenon that each supporting point is stressed unevenly is effectively solved, thereby avoiding the permanent deformation of the equipment to be treated caused by expansion with heat and contraction with cold in the heat treatment process, ensuring the product quality and saving the huge loss caused by repair treatment due to deformation. Convenient operation, safety and reliability.

The device is applied to heat treatment of large or super-large equipment such as a coke tower, a raffinate tower, a xylene tower, a propylene tower, a PE reactor and the like, no tower body or section-shaped cylinder body to be treated has heat treatment deformation, and the quality of the heat-treated equipment is very ideal.

Claims

1. The supporting device for heat treatment comprises a steel casting arranged on a heat treatment furnace platform and used for supporting a workpiece to be treated, and is characterized in that a rolling device capable of providing radial displacement for the workpiece to be treated is further arranged on the steel casting.

2. The supporting device for heat treatment according to claim 1, wherein the rolling device comprises a box body, rolling members capable of rolling in the box body are placed in the box body, and a rolling plate on which the workpiece to be treated is placed and which can roll on the rolling members and can move relative to the box body is placed above the rolling members.

3. The thermally treating support device according to claim 2, wherein said rolling members are a plurality of long cylindrical rods disposed in parallel.

4. The thermal processing support device of claim 3, wherein the box is rectangular, the rolling members are disposed along a length of the box, and a length of the rolling members is 15 to 30mm smaller than a length of the box.

5. The support device for heat treatment according to any one of claims 1 to 4, wherein a rotating device capable of rotating the rolling device under the action of an external force is further provided between the rolling device and the steel casting.

6. The support device for heat treatment as claimed in claim 5, wherein the rotating means comprises a shaft provided on the steel casting and a shaft hole provided on the case for receiving the shaft, the case being rotatable about the shaft.

7. The thermally treating support device of claim 6, wherein said shaft is secured to a transition piece which is captured on said steel casting.