CN-115418470-B - Weld joint heating supporting device and heating device for inner surface and outer surface of spherical seal head and cylinder

CN115418470BCN 115418470 BCN115418470 BCN 115418470BCN-115418470-B

Abstract

The invention belongs to the technical field of welding seam processing of nuclear power voltage regulators, and provides a welding seam heating supporting device and a heating device for inner and outer surfaces of a spherical sealing head and a cylinder body, wherein the welding seam heating supporting device comprises a first hoop assembly fixed on the spherical sealing head, a second hoop assembly fixed on the inner surface or the outer surface of the cylinder body and a plurality of compressing pieces used for compressing a flexible electric heating sheet, the first hoop assembly and the second hoop assembly comprise a plurality of connecting pieces which are arranged in an arc shape, the connecting pieces are connected through a detachable connecting structure and combined to form a circular ring structure, two ends of the compressing pieces are respectively connected to the connecting pieces of the first hoop assembly and the second hoop assembly, and the compressing pieces are compressed on the flexible electric heating sheet on a heating area. The invention realizes the fixation and compaction of the flexible electric heating sheet, so that the flexible electric heating sheet is tightly attached to the surface of the area to be heated, thereby avoiding heat loss and improving heating efficiency.

Inventors

HAN FENG
Zhen Huian
LI ZHAO
GAN YULIN

Assignees

东方电气(广州)重型机器有限公司

Dates

Publication Date: 20260512
Application Date: 20220817

Claims (9)

1. The welding seam heating supporting device for the inner surface and the outer surface of the spherical sealing head and the cylinder body is characterized by comprising a first hoop assembly fixed on the inner surface or the outer surface of the spherical sealing head, a second hoop assembly fixed on the inner surface or the outer surface of the cylinder body and a plurality of pressing pieces for pressing the flexible electric heating sheets; The first hoop assembly and the second hoop assembly comprise a plurality of connecting pieces which are arranged in an arc shape, and the connecting pieces are connected through a detachable connecting structure and combined to form a circular ring structure; the connecting pieces of the first hoop assembly and the second hoop assembly are respectively provided with a plurality of fixing screws, both ends of the pressing piece are respectively provided with fixing holes, and both ends of the pressing piece are respectively penetrated on the fixing screws through the fixing holes and are locked and fixed through fixing nuts.
2. The welding seam heating support device for the inner and outer surfaces of the spherical sealing head and the cylinder body according to claim 1, wherein the connecting piece of the first hoop assembly is a connecting pipe which is arranged in an arc shape.
3. The welding seam heating and supporting device for the inner surface and the outer surface of the spherical sealing head and the cylinder body according to claim 1, wherein the connecting piece of the second hoop assembly is a connecting plate which is arranged in an arc shape.
4. A weld joint heating support device for an inner surface and an outer surface of a spherical sealing head and a cylinder body according to any one of claims 1 to 3, wherein splice plates are arranged at two ends of the connecting piece, the splice plates extend along the radial direction, and splice holes are formed in the splice plates; The detachable connection structure comprises a double-headed screw and two groups of nut assemblies, wherein two ends of the double-headed screw are respectively penetrated in splicing holes of splice plates of connecting pieces of the first hoop assembly and the second hoop assembly, and the two groups of nut assemblies are respectively connected with the double-headed screw in a matched manner and are locked by the splice plates.
5. The welding seam heating supporting device for the inner and outer surfaces of the spherical sealing head and the cylinder body according to claim 4, wherein a plurality of fixing screws are arranged on the connecting pieces at equal intervals along the circumferential direction, and the connecting pieces on the first hoop assembly and the second hoop assembly are arranged in a one-to-one correspondence.
6. The welding seam heating and supporting device for the inner surface and the outer surface of the spherical sealing head and the cylinder body according to claim 1, wherein the cross section of the pressing piece is in a C-shaped arrangement.
7. The welding seam heating supporting device for the inner surface and the outer surface of the spherical sealing head and the barrel according to claim 1 or 6, wherein a plurality of adjusting and installing holes are formed in the pressing piece, the adjusting and installing holes are matched with fixing screws on the connecting piece, and the adjusting and installing holes are arranged along the length direction of the pressing piece.
8. The weld joint heating support apparatus of claim 1, wherein at least 3 connectors are provided for the first hoop assembly and the second hoop assembly.
9. A heating device is characterized by comprising two welding seam heating supporting devices for the inner surface and the outer surface of a spherical sealing head and a cylinder body, a flexible electric heating sheet and power supply equipment, wherein the flexible electric heating sheet is electrically connected with the power supply equipment, the power supply equipment provides power for the flexible electric heating sheet, the flexible electric heating sheet covers welding seam heating areas for the inner surface and the outer surface of the spherical sealing head and the cylinder body, and the welding seam heating supporting devices for the inner surface and the outer surface of the spherical sealing head and the cylinder body are respectively arranged on the outer surface of the spherical sealing head and the cylinder body and the inner surface of the spherical sealing head and the cylinder body.

Description

Weld joint heating supporting device and heating device for inner surface and outer surface of spherical seal head and cylinder Technical Field The invention belongs to the technical field of welding seam processing of nuclear power voltage regulators, and particularly relates to a welding seam heating supporting device and a heating device for inner and outer surfaces of a spherical sealing head and a cylinder. Background After the spherical end socket of the nuclear power voltage stabilizer is welded with the cylindrical shell, the welding seam is required to be heated so as to achieve the effect of eliminating welding stress, and when the welding seam stress is eliminated, a designated area is required to be heated until the temperature is high (600 ℃). At present, natural gas is used as a raw material and is heated by a torch, so that the effect of eliminating stress is achieved. In the prior art, a torch heating mode is adopted, so that different shapes and positions of a product to be heated can be heated conveniently, but natural gas is combusted in air in the heating process, when the welding line of the cylinder is heated, the heating efficiency of the welding line is lower due to the influences of air circulation, ambient temperature and the like, the heating time is prolonged, the energy waste is large, and generated carbon dioxide, sulfur dioxide and other waste gases are more and do not meet the current environmental requirements. In order to solve the above problems, the applicant proposes a method for heating a weld seam by using a flexible electric heating sheet, specifically, covering a region to be heated with the flexible electric heating sheet, and transferring heat to the surface of the region to be heated by heat conduction, thereby realizing heating treatment on a product and eliminating weld seam stress. When the heating mode is adopted, in order to enable the flexible electric heating sheet to be better attached and fixed with the surface of the area to be heated, the heating efficiency is further improved, and therefore the welding seam heating supporting device is provided. Disclosure of Invention In order to overcome the defects in the prior art, the invention aims to provide a welding seam heating supporting device for the inner surface and the outer surface of a spherical sealing head and a cylinder body, which can fix and compress a flexible electric heating sheet, so that the flexible electric heating sheet is tightly attached to the surface of a region to be heated, heat loss is avoided, and heating efficiency is improved. Another object of the present invention is to provide a heating device comprising the above weld joint heating support device. The technical scheme adopted for solving the technical problems is as follows: the welding seam heating supporting device for the inner surface and the outer surface of the spherical sealing head and the cylinder body comprises a first hoop assembly fixed on the spherical sealing head, a second hoop assembly fixed on the inner surface or the outer surface of the cylinder body and a plurality of pressing pieces for pressing the flexible electric heating sheets; the first hoop assembly and the second hoop assembly comprise a plurality of connecting pieces which are arranged in an arc shape, the connecting pieces are connected through a detachable connecting structure and are combined to form a circular ring structure, two ends of the pressing piece are respectively connected to the connecting pieces of the first hoop assembly and the second hoop assembly, and the pressing piece is pressed on a flexible electric heating sheet on a heating area. Preferably, the connecting piece of the first hoop assembly is a connecting pipe which is arranged in an arc shape. Preferably, the connecting piece of the second hoop assembly is a connecting plate which is arranged in an arc shape. Preferably, splice plates are arranged at two ends of the connecting piece, the splice plates are arranged in an extending mode along the radial direction, and splice holes are formed in the splice plates; The detachable connection structure comprises a double-headed screw and two groups of nut assemblies, wherein two ends of the double-headed screw are respectively penetrated in splicing holes of splice plates of connecting pieces of the first hoop assembly and the second hoop assembly, and the two groups of nut assemblies are respectively connected with the double-headed screw in a matched manner and are locked by the splice plates. Preferably, a plurality of fixing screws are arranged on the connecting pieces of the first hoop assembly and the second hoop assembly, fixing holes are formed in two ends of the pressing piece, and two ends of the pressing piece are respectively penetrated on the fixing screws through the fixing holes and are locked and fixed through fixing nuts. Preferably, the plurality of fixing screws are arranged on the connecting pieces at equa