CN110143375B

CN110143375B - Anti-leakage structure capable of absorbing thermal expansion

Info

Publication number: CN110143375B
Application number: CN201910392755.3A
Authority: CN
Inventors: 李召生; 张旭; 吴久江; 夏金辉
Original assignee: Harbin Boiler Co Ltd
Current assignee: Harbin Boiler Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2021-06-18
Anticipated expiration: 2039-05-13
Also published as: CN110143375A

Abstract

The present invention provides a flow leakage prevention structure that can absorb thermal expansion. The problem that the connecting structure of the internal part and the shell is deformed or cracked too much to fail is mainly solved. The upper end and the lower end of the internal part (6) are both in a structural form of bending outwards, the upper end of the internal part (6) is bent and connected with the pressure-bearing shell (5) in a welding mode, the lower end of the internal part (6) is bent and not connected with the pressure-bearing shell (5), the lower end of the internal part (6) is bent and tightly abutted with the elastic element (4) to form sealing, the elastic element (4) is clamped and fixed by the fastening piece (2) through the two clamping plates (3), the outer end of the positioning plate (1) is welded and fixed with the pressure-bearing shell (5), and the inner end of the positioning plate is welded and fixed with. The invention has simple structure, the elastic element is easy to disassemble and replace if damaged, the thermal expansion generated by the internal part can be absorbed by the elastic element and can not cause thermal stress in the structure, and simultaneously, the elastic element tightly supports the internal part to prevent the medium from generating leakage flow, thereby ensuring the technical performance of the equipment.

Description

Anti-leakage structure capable of absorbing thermal expansion

Technical Field

The invention relates to a connecting structure of an internal part and a shell of a large-scale chemical container, in particular to a flow leakage prevention structure capable of absorbing thermal expansion.

Background

With continuous progress of chemical technology, pressure-bearing equipment is continuously developed towards large-scale and high-parameter directions, functions to be realized are more complex, one pressure-bearing equipment is often required to realize more than two functions, for example, the functions of a reactor and a heat exchanger are also required to be realized, internal working conditions are increasingly variable and severe, internal parts are also increasingly complex, part of the internal parts are required to be welded and fixed on a pressure-bearing shell, but the internal parts and the shell are connected through a large temperature difference stress due to the fact that the internal parts and the pressure-bearing shell have temperature difference, size difference and materials are different sometimes, and the like, and the structure is caused to generate overlarge deformation or crack to fail seriously. Often because the inside of the pressure-bearing equipment is provided with heat exchange tubes, a catalyst or a refractory material, the space is limited, great inconvenience is brought to the maintenance and the replacement of the internal parts, sometimes the repair and the replacement of the internal parts can be realized even by cutting off the pressure-bearing shell, a series of construction work such as groove grinding, welding, heat treatment, detection and the like is needed when the pressure-bearing shell is folded again, and the maintenance material cost and the maintenance time cost are very high.

Disclosure of Invention

The invention aims to solve the problems in the prior art and further provides a flow leakage prevention structure capable of absorbing thermal expansion. Compared with the prior art, the problem that the structure is cracked due to temperature difference stress generated by nonuniform thermal expansion when the upper end and the lower end of the internal part are welded with the pressure bearing shell is solved, and the defect of difficulty in maintenance and replacement after cracking is overcome.

The purpose of the invention is realized by the following technical scheme:

the upper end and the lower end of the internal part are both in a structural form of bending outwards, the upper end of the internal part is bent and connected with the pressure-bearing shell in a welding mode, the lower end of the internal part is bent and not connected with the pressure-bearing shell, the lower end of the internal part is bent and tightly abutted against the elastic element to form a seal, the elastic element is clamped and fixed by the fastener through two clamping plates, the outer end of the positioning plate is welded and fixed with the pressure-bearing shell, and the inner end of the positioning plate is welded and fixed with the clamping plates.

The elastic element is provided with at least one piece, and the upper end of the elastic element and the lower end of the inner piece are mutually abutted to form at least one linear seal.

The clamping plate is composed of an inner steel plate and an outer steel plate, and the fastener which is matched with the inner steel plate and is installed and fastened is a bolt mechanism.

The invention has the beneficial effects that: by adopting the technical scheme of the invention, the structure is simple, if the elastic element is damaged, the elastic element is easy to disassemble and replace, the thermal expansion generated by the internal part can be absorbed by the elastic element, the thermal stress cannot be caused in the structure, and meanwhile, the elastic element is tightly propped against the internal part to prevent the medium from generating leakage flow, thereby ensuring the technological performance of the equipment. Compared with the prior art, the problem that the structure is cracked due to temperature difference stress generated by nonuniform thermal expansion when the upper end and the lower end of the internal part are welded with the pressure bearing shell is solved, and the defect of difficulty in maintenance and replacement after cracking is overcome.

Drawings

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

Fig. 2 is a partially enlarged view of the structural schematic of the present invention.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the anti-leakage structure capable of absorbing thermal expansion according to the present embodiment includes a positioning plate 1, a fastening member 2, a clamping plate 3, an elastic element 4, a pressure-bearing housing 5, and an internal member 6, wherein the upper end and the lower end of the internal member 6 are both in an outwardly bent structural form, the upper end of the internal member 6 is bent and connected with the pressure-bearing housing 5 by welding, the lower end of the internal member 6 is bent and not connected with the pressure-bearing housing 5, the lower end of the internal member 6 is not directly connected with the pressure-bearing housing 5, and during a downward expansion process, a counterforce given by the elastic element 4 is small, so that a restriction effect on thermal expansion is small, and excessive thermal stress generated;

the lower end of the internal member 6 is bent to be tightly abutted against the elastic element 4 to form a seal, the elastic element 4 is clamped and fixed by the fastener 2 through the two clamping plates 3, the outer end of the positioning plate 1 is welded and fixed with the pressure-bearing shell 5, and the inner end of the positioning plate is welded and fixed with the clamping plates 3.

The elastic element 4 is provided with at least one piece, the upper end of the elastic element 4 and the lower end of the internal part 6 are mutually abutted to form at least one linear seal, and the upper end of the elastic element 4 and the lower end of the internal part 6 are mutually abutted to form a plurality of linear seals, so that the phenomenon that the process performance is influenced due to leakage flow in the equipment is avoided. .

Splint 3 constitute for inside and outside two steel sheets, with its cooperation installation fastening fastener 2 be bolt mechanism, elastic element 4 presss from both sides tightly fixedly with fastener 2 and splint 3), if need maintain the change, only need unscrew the fastener can, dismantle convenient and fast.

The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The anti-leakage structure capable of absorbing thermal expansion comprises a positioning plate (1), a fastening piece (2), a clamping plate (3), an elastic element (4), a pressure-bearing shell (5) and an internal piece (6), and is characterized in that the upper end and the lower end of the internal piece (6) are both in an outwards bent structural form, the upper end of the internal piece (6) is bent and connected with the pressure-bearing shell (5) in a welding manner, the lower end of the internal piece (6) is bent and not connected with the pressure-bearing shell (5), the lower end of the internal piece (6) is bent and tightly connected with the elastic element (4) to form a seal, the elastic element (4) is clamped and fixed by the fastening piece (2) through two clamping plates (3), the outer end of the positioning plate (1) is welded and fixed with the pressure-bearing shell (5; the elastic element (4) is provided with at least one piece, and the upper end of the elastic element (4) and the lower end of the inner piece (6) are mutually abutted to form at least one linear seal.

2. The structure of claim 1, wherein the clamping plate (3) is formed by an inner steel plate and an outer steel plate, and the fastener (2) which is matched with the inner steel plate and is fixedly arranged is a bolt mechanism.