CN214747386U

CN214747386U - U-shaped shell heat exchanger and tube bundle restraint device thereof

Info

Publication number: CN214747386U
Application number: CN202022949573.2U
Authority: CN
Inventors: 王强; 柯展煌; 邓科; 李志炜; 季敏东; 王炯铭; 王江; 何秋婷
Original assignee: Guodian Quanzhou Thermal Power Co ltd; Dongfang Boiler Group Co Ltd
Current assignee: Dongfang Boiler Co Ltd; Guoneng Quanzhou Thermal Power Co ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-11-16
Anticipated expiration: 2030-12-11

Abstract

The utility model relates to a U-shaped shell heat exchanger and tube bank restraint device thereof of easily assembling, among the U-shaped shell heat exchanger, the elbow part of tube bank is located the afterbody casing, and the straight tube part of tube bank is supported by the straight section backup pad of casing, and includes the tube bank restraint device that will be described later, and the afterbody casing is formed by the two halves welding of left and right symmetry. The tube bundle restraining device of the U-shaped shell heat exchanger comprises a support grid assembly, the support grid assembly comprises a plurality of parting beads for separating tube bundles, the support grid assembly further comprises a support plate, a base plate and a pair of shells, the parting beads are connected between the pair of shells, the end parts of the parting beads are positioned in groove-shaped notches uniformly distributed on the shells, two ends of the two shells are respectively connected into a whole through the base plate, and the base plate is connected with the support plate; the support grid components are at least two groups, and the support plates of the support grid components are fixedly connected with the straight section support plate of the shell through the same serial connection plate. The utility model discloses be convenient for process, the anti vibration is effectual.

Description

U-shaped shell heat exchanger and tube bundle restraint device thereof

Technical Field

The utility model relates to a U-shaped shell heat exchanger, especially a structure that is used for its afterbody tube bank to support.

Background

In the technical fields of solar photo-thermal, thermal power heat supply, energy storage and the like, because the temperature difference of cold and hot media is large, the traditional heat exchanger is difficult to meet the use requirement, and a novel U-shaped shell heat exchanger is generally adopted. The typical characteristic of the heat exchanger is that the tube bundle and the shell are both in U-shaped structures, and the heat exchanger has good temperature difference compensation effect and can realize deep heat exchange.

Different from the traditional U-shaped tube-plate heat exchanger, the novel U-shaped shell heat exchanger is also called a hairpin type heat exchanger, the tail shell of the novel U-shaped shell heat exchanger is of a semicircular ring structure, and conventional tube penetrating operation cannot be carried out. The tail tube bundle and the shell need to adopt special supporting structures and assembling processes. The supporting structure at the tail part of the heat exchanger needs to comprehensively consider factors in multiple aspects such as thermal expansion, supporting action, vibration prevention action, process assembly operation and the like of the tube bundle.

The utility model discloses a chinese utility model patent U type heat exchanger tube bank shock mounting, publication number CN204165442U, that discloses in 2015 at 2/18, its utilizes blend stop, back shaft, edge frame, well spacer and lacing wire as fixing device, retrains the tube bank, and restraint structure is fixed with the casing of heat exchanger. The structure can play a role in shock resistance, but the structure is only suitable for a traditional U-shaped tube plate heat exchanger with a straight tube-shaped shell, so that the structure can be conveniently connected with the shell by using the tie bars, and the support structure cannot be directly used for the U-shaped shell heat exchanger.

SUMMERY OF THE UTILITY MODEL

The limited not enough of afterbody tube bank support difficulty, assembly operating space to current U-shaped shell heat exchanger, the utility model aims to solve the technical problem that a U-shaped shell heat exchanger and tube bank restraint device of easy assembly are provided.

The utility model provides a technical scheme that its technical problem adopted is: the tube bundle restraining device of the U-shaped shell heat exchanger comprises a tube bundle elbow part, a straight tube part and a pair of cladding, wherein the tube bundle elbow part is positioned in a tail shell, the straight tube part of the tube bundle is supported by a straight support plate of the shell, the restraining device comprises a support grid assembly, the support grid assembly comprises a plurality of parting strips for separating the tube bundle, the support grid assembly further comprises a support plate, a backing plate and a pair of cladding, the parting strips are connected between the pair of cladding, the end parts of the parting strips are positioned in groove-shaped notches uniformly distributed on the cladding, two ends of the two cladding are respectively connected into a whole through the backing plate, and the backing plate is connected with the support plate; the support grid components are at least two groups, and the support plates of the support grid components are fixedly connected with the straight section support plate of the shell through the same serial connection plate.

The tube bundle is bent into an arc shape, the cladding is correspondingly designed to be a circular arc plate with uniform width and thickness, the gap interval of the groove-shaped notch is matched with the gap of the adjacent tubes in the tail tube bundle, the groove-shaped notch is directly utilized to position the parting strip, the processing efficiency is improved, the depth of the notch of the groove-shaped notch is less than half of the width of the cladding, and the use requirement can be met even if part of strength loss is caused by the notch.

The connection part of the support plate and the base plate is provided with an opening for the penetration of the tandem connection plate, and the tandem connection plate is welded with the base plate and the support plate. Through reserving the opening in order to connect the tandem plate, convenient welding.

The serial connection plate has two sets ofly, and the serial connection plate is located the outside of tube bank, and convenient assembly is close to respectively one side that afterbody tube bank bending radius is less with the great opposite side of afterbody tube bank bending radius is called little semicircle ring board and big semicircle ring board respectively, and the structure is more reliable and more stable.

The support plate is a semicircular plate to supplement the defects of grid structure rigidity and support strength.

Only one end of the series connection plate is fixedly connected with the straight section supporting plate of the shell, and the other end of the series connection plate is in a free state, so that the constraint structure of the series connection plate can meet the requirement of free expansion and contraction of the tube bundle due to thermal expansion.

Considering that the bending shape of each tube in the tube bundle is generally a regular semi-circular arc, the planes of the support plates of each group of support grid assemblies have the same intersection line and are arranged at equal included angles, so as to obtain better vibration resistance.

The utility model also provides a U-shaped shell heat exchanger, including foretell tube bank restraint device, its afterbody casing is formed by the two halves welding of left and right symmetry to make things convenient for the assembly.

The utility model discloses a U-shaped shell heat exchanger's tube bank restraint device both can be applicable to and be the heat exchanger that horizontal arranged, also can be applicable to and be the vertical heat exchanger of arranging.

The utility model has the advantages that: the tube bundle supporting effect is good, the assembly is simple, and the production efficiency is high; the tube bundle can freely stretch in the horizontal axis direction, so that the requirement of thermal expansion of the tube bundle is met; the tube bundle is restrained in the vertical direction, so that the vibration failure of the tubes is avoided; each group of support grid devices are connected in series through the two large semicircular ring plates and the two small semicircular ring plates to form a whole, the rigidity is strong, the anti-vibration effect is good, and meanwhile, the requirement of free expansion and contraction of the pipe bundle is met, so that the service life and the reliability of the U-shaped shell heat exchanger are improved.

Drawings

Fig. 1 is a schematic view of the whole tube bundle restraint device of the U-shaped shell heat exchanger of the present invention.

Fig. 2 is a view in the direction P of fig. 1.

Fig. 3 is a cross-sectional view a-a (rotational) of fig. 1.

Fig. 4 is a partially enlarged view of portion i in fig. 3.

Fig. 5 is a partially enlarged view of a portion ii in fig. 3.

Fig. 6 is a top view of fig. 3.

Fig. 7 is a front view of the enclosure of fig. 1.

Fig. 8 is a top view of fig. 7.

Fig. 9 is a partially enlarged view of the portion iii in fig. 8.

Fig. 10 is a front view of the support plate of fig. 1.

Fig. 11 is a front view of the tandem plate (small semicircular ring plate) of fig. 1.

Fig. 12 is a front view of the tandem plate (large semicircular plate) of fig. 1.

Fig. 13 is a front view of the U-shaped housing of fig. 1.

Fig. 14 is a left side view of fig. 13.

Fig. 15 is a schematic view of the two half shells of fig. 13.

Labeled as: 1-tail shell, 2-support grid component, 3-big semicircular plate, 4-small semicircular plate, 5-shell straight section support plate, 6-shell straight section support plate, 7-support plate, 8-cladding, 9-parting strip, 10-backing plate, 11-intersection line and 12-groove-shaped gap.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 1-15, the tube bundle restraint device of the U-shaped shell heat exchanger of the present invention has an elbow portion of the tube bundle located in the tail shell 1, two straight tube portions of the tube bundle are respectively supported by the shell straight support plate 5 and the shell straight support plate 6, the restraint device includes a support grid assembly 2, the support grid assembly 2 is used for separating and supporting the elbow portion of the tube bundle, the support grid assembly 2 includes a support plate 7, a backing plate 10, a pair of shells 8 and a plurality of spacers 9, the spacers 9 are connected between the pair of shells 8, the shells 8 are circular arc plates with uniform width and thickness, the ends of the spacers 9 are located in the uniformly distributed groove-shaped gaps 12 on the shells 8, the positioning of the spacers 9 is performed by using the groove-shaped gaps 12, the processing efficiency is improved, the gap interval of the groove-shaped gaps 12 is matched with the gap of the adjacent tubes in the tail tube bundle, the gap depth of the groove-shaped gaps 12 is less than half of the width of the shells 8, two ends of the two cladding shells 8 are respectively connected into a whole through a backing plate 10, and the backing plate 10 is connected with the supporting plate 7; the support grid assemblies 2 are at least two groups, the support plates 7 of the support grid assemblies 2 of each group are connected through the same series connection plate, the connection positions of the support plates 7 and the base plate 10 are provided with openings for the series connection plates to pass through, and the series connection plates are welded with the base plate 7 and the support plates 10, so that the processing is convenient. According to the structure, the part cladding, the parting strips, the supporting plate and the base plate are assembled and combined into the supporting grid assembly, all parts of the assembly are assembled and welded after the tube bundle is in place, the formed grid structure forms an integral structure through the series connection plate, the processing and the production are convenient, the vibration of the tube bundle can be restrained, the tube bundle is allowed to freely stretch in the horizontal axis direction due to thermal expansion, and the anti-vibration capability of the tube bundle in the tail shell is enhanced.

In order to save space and provide necessary support, the two sets of serial connection plates are semicircular plates, are positioned on the outer side of the tube bundle and are respectively close to one side with smaller bending radius of the tail tube bundle and the other side with larger bending radius of the tail tube bundle and are respectively called a small semicircular plate 4 and a large semicircular plate 3, one end of each of the four serial connection plates is fixedly connected with one of the straight support plates 5 of the shell, and the other end of each of the four serial connection plates is a free end.

Example (b):

as shown in fig. 1-15, the U-shaped shell heat exchanger of this embodiment is horizontal, and the elbow part of tube bank is located the afterbody casing, and the straight tube part of tube bank is supported by casing straight section backup pad 5, 6, and casing straight section backup pad 5, 6 are located two parallel straight section casings respectively, to the elbow part of tube bank that is located its afterbody casing 1, adopt the utility model discloses a tube bank restraint device supports.

As shown in fig. 1-12, by combining the shape and distribution of the tube bundle in the tail shell 1, two semicircular plates are used as the support plate 7, two envelopes 8 and two backing plates 10 are symmetrically arranged, two ends of the envelope 8 are welded and fixed by one backing plate 10, each backing plate 10 is welded with the support plate 7 at the side to form a frame structure of the support grid assembly 2, a plurality of groove-shaped notches 12 are processed on the envelope 8, the size, the interval and the number of the notches are determined according to the tube bundle distribution form, two ends of a flat steel bar used as a division bar 9 are inserted into the groove-shaped notches 12 of the envelope 8 and are welded with the envelope 8 to form a grid structure, five groups of support grid assemblies 2 are arranged in the tail shell 1, of course, the number of the support grid assemblies 2 can be adjusted according to actual requirements, the planes of the support plates of all the support grid assemblies 2 have the same intersection line 11 and are arranged at equal included angles, and are connected in series by using two large semicircular plates 3 and two small semicircular plates 4 as series connection plates, four semicircular ring plates penetrate through each group of supporting grid assemblies 2 from four directions of upper left, lower left, upper right and lower right respectively, and are welded and fixed with the supporting plate 7 and the base plate 10, one end of each series connection plate is welded with the straight section supporting plate 5 of the shell of the straight section barrel body part, the other end of each series connection plate is not welded, and the non-constrained state is kept. Or all the series connection plates can be welded with the shell straight section supporting plate 6 of the straight section barrel body part, and the other end of the series connection plates is not welded.

As shown in fig. 13 to 15, the U-shaped shell heat exchanger tail shell 1 of the present embodiment is composed of two tile-shaped elbows, namely a lower half and an upper half, and after all the support grid components are arranged, the lower half is sleeved and the upper half is sleeved.

The application of the structure improves the production efficiency and the supporting effect, strengthens the anti-vibration capability of the tail tube bundle, and simultaneously meets the requirement of free expansion and contraction of the thermal expansion of the tube bundle, thereby improving the service life and the reliability of the equipment.

Claims

The tube bundle restraint device of the U-shaped shell heat exchanger is characterized in that an elbow part of a tube bundle is located in a tail shell (1), a straight tube part of the tube bundle is supported by straight support plates (5 and 6) of the shell, the restraint device comprises a support grid assembly (2), and the support grid assembly (2) comprises a plurality of partition bars (9) used for separating the tube bundle: the support grid assembly (2) further comprises a support plate (7), a backing plate (10) and a pair of cladding shells (8), the division bar (9) is connected between the pair of cladding shells (8), the end part of the division bar (9) is positioned in groove-shaped notches (12) uniformly distributed on the cladding shells (8), two ends of the two cladding shells (8) are respectively connected into a whole through the backing plate (10), and the backing plate (10) is connected with the support plate (7); the support grid assemblies (2) are at least two groups, and the support plates (7) of the support grid assemblies (2) are fixedly connected with the straight section support plate (5) of the shell through the same serial connection plate.
2. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 1, wherein: the cladding (8) is a circular arc-shaped plate with uniform width and thickness, the gap interval of the groove-shaped notch (12) is matched with the gap of the adjacent pipes in the tail pipe bundle, and the depth of the notch of the groove-shaped notch (12) is less than half of the width of the cladding (8).
3. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 1, wherein: an opening for the penetration of the tandem connection plate is arranged at the joint of the support plate (7) and the base plate (10), and the tandem connection plate is welded with the base plate (10) and the support plate (7).
4. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 3, wherein: the two groups of serial connection plates are arranged on the outer side of the tube bundle, are respectively close to one side with smaller bending radius of the tail tube bundle and the other side with larger bending radius of the tail tube bundle and are respectively called as a small semicircular plate (4) and a large semicircular plate (3).
5. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 1, wherein: the supporting plate (7) is a semicircular plate.
6. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 1, wherein: only one end of the serial connection plate is fixedly connected with the straight section supporting plate (5) of the shell, and the other end of the serial connection plate is in a free state.
7. The tube bundle restraint apparatus of a U-shaped shell heat exchanger as claimed in claim 1, wherein: the planes of the supporting plates (7) of all groups of supporting grid assemblies (2) have the same intersection line and are arranged at equal included angles.
A U-shaped shell heat exchanger comprising a tube bundle restraint device of the U-shaped shell heat exchanger according to any one of claims 1 to 7, characterized in that: the tail shell (1) is formed by welding two symmetrical left and right halves.
9. A U-shaped shell heat exchanger as claimed in claim 8 wherein: the heat exchanger is arranged horizontally.
10. A U-shaped shell heat exchanger as claimed in claim 8 wherein: the heat exchanger is arranged vertically.