CN219103812U - U-shaped end tube bundle vibration-proof device of hairpin heat exchanger - Google Patents

Abstract

A U-shaped end tube bundle vibration-proof device of a hairpin heat exchanger belongs to the field of new energy and electric power systems. The edge frames are sleeved on the periphery of the tube bundle before the tube bundle is not wrapped by the U-shaped tube bundle end shell, then division bars penetrate into gaps of two adjacent heat exchange tubes, the division bars are attached to the heat exchange tubes, two ends of the division bars extending out of the tube bundle are respectively lap-welded on the corresponding edge frames, the two adjacent edge frames are fixedly connected through middle lacing wires and a plurality of side lacing wires, and the vibration isolation device is integrally welded on the upper baffle plate through a plurality of middle lacing wires and a plurality of side lacing wires. The vibration isolator can absorb the relative displacement and thermal stress of the upper and lower tube bundles of the hairpin heat exchanger caused by temperature difference, and has the advantages of simple and compact structure, less material consumption, low cost, convenient processing and manufacturing, higher reliability and good vibration isolation effect.

Description

U-shaped end tube bundle vibration-proof device of hairpin heat exchanger

Technical Field

The utility model belongs to the field of new energy and power systems, and particularly relates to a U-shaped end tube bundle vibration-proof device of a hairpin heat exchanger.

Background

In recent years, hairpin heat exchangers are widely applied to the photo-thermal power station project in the new energy field due to the characteristics of high heat exchange performance, compact structure, applicability to large temperature difference working conditions and the like. In the working process of the hairpin heat exchanger, as the medium in the shell is in a turbulent flow state, the disturbance is severe, the U-shaped end tube bundle easily vibrates without a reliable supporting structure, the vibration of the whole heat exchanger can be caused by slight vibration, and the tube bundle can be broken when serious, so that the heat exchanger cannot normally operate.

In order to prevent the vibration of the U-shaped end tube bundle, the traditional U-shaped tube heat exchanger is usually bound by adopting a steel belt, and the number of binding turns is increased or decreased according to the intensity of vibration. The U-shaped end tube bundle vibration-proof device of the hairpin heat exchanger refers to the traditional U-shaped end tube bundle vibration-proof structure of the U-shaped tube heat exchanger, but in practical application, the degree of tightness of binding of the steel belt directly influences the vibration-proof effect of the tail end of the tube bundle, the tube bundle on the periphery of the binding is easily crushed by the steel belt when being extruded by the steel belt, and adjacent heat exchange tubes are extruded together, so that the heat exchange tubes are large in deformation, have internal stress, the heat exchanger runs for a long time, and the tube bundle is at risk of cracking; the binding is too loose, so that the vibration-proof effect is poor, the steel belt can easily move in the shell along with the flowing of the medium, and the heat exchange tube is easily scratched to damage the tube bundle. In order to solve the above drawbacks, to improve the service efficiency of the tube bundle, a novel vibration-proof device applicable to the U-shaped end tube bundle of the hairpin heat exchanger is needed to replace the traditional binding structure.

Disclosure of Invention

The utility model aims to solve the problems in the background art and provides a vibration-proof device at the tail end of a tube bundle of a hairpin heat exchanger.

The technical scheme adopted by the utility model is as follows:

a U-shaped end tube bundle vibration-proof device of a hairpin heat exchanger comprises a plurality of middle lacing wires, a plurality of side lacing wires, a plurality of edge frames and a plurality of parting strips;

the edge frames are sleeved on the periphery of the tube bundle, division bars penetrate into gaps of two adjacent heat exchange tubes of the tube bundle and are attached to the heat exchange tubes, two ends of the division bars extending out of the tube bundle are respectively welded on the corresponding edge frames in a lap welding mode, the two adjacent edge frames are fixedly connected through a plurality of middle lacing wires and a plurality of side lacing wires, the plurality of middle lacing wires are arranged at the position with the largest diameter outside the U-shaped end of the tube bundle, the plurality of side lacing wires are arranged on the left side and the right side of the U-shaped end of the tube bundle, and the vibration isolation device is integrally welded on the upper baffle plate through the plurality of middle lacing wires and the plurality of side lacing wires.

Further, the edge frame is a rectangular frame with four corners and circular arcs in transition.

Further, the parting bead is made of thin steel plates.

Compared with the prior art, the utility model has the beneficial effects that: 1. the flexibility is high, and the number of edge frames can be increased or reduced according to the intensity of vibration of the U-shaped end tube bundle of the hairpin heat exchanger; 2. the device can absorb the relative displacement and thermal stress of the upper and lower tube bundles of the hairpin heat exchanger caused by the temperature difference (as shown in figure 2, the temperature gradually decreases as high-temperature fluid flows from the upper tube bundle to the lower tube bundle, so that the temperature of the wall of the upper tube bundle is higher than that of the wall of the lower tube bundle, and the thermal expansion difference of the upper tube bundle and the lower tube bundle is larger; 3. the utility model has the characteristics of simple and compact structure, less material consumption, low cost, convenient processing and manufacturing, higher reliability and good vibration-proof effect.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a hairpin heat exchanger;

FIG. 2 is a front view of a hairpin tube bundle vibration isolator of the hairpin heat exchanger of the utility model;

FIG. 3 is a side view of a hairpin heat exchanger U-end tube bundle vibration isolator of the utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 2;

fig. 5 is a top view of fig. 4.

The component names and reference numerals referred to in the above figures are as follows:

the device comprises a middle lacing wire 1, side lacing wires 2, an edge frame 3, parting strips 4, a U-shaped tube bundle end shell 5, a tube bundle 6 and an upper baffle plate 7.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are all within the protection scope of the present utility model.

The first embodiment is as follows: as shown in fig. 1 to 5, the present embodiment discloses a hairpin-type heat exchanger U-shaped end tube bundle vibration isolator, which comprises a plurality of middle tie bars 1, a plurality of side tie bars 2, a plurality of edge frames 3 and a plurality of parting strips 4;

the edge frames 3 are sleeved on the periphery of the tube bundle 6 (before the tube bundle 6 is not wrapped by the U-shaped tube bundle end shell 5), partition strips 4 penetrate into gaps of two adjacent heat exchange tubes of the tube bundle 6, the partition strips 4 are attached to the heat exchange tubes, two ends of parts, extending out of the tube bundle 6, of the partition strips 4 are respectively lap welded on the corresponding edge frames 3, the two adjacent edge frames 3 are fixedly connected through a plurality of middle lacing wires 1 and a plurality of side lacing wires 2 (the two adjacent edge frames 3 are welded with the plurality of middle lacing wires 1 and the plurality of side lacing wires 2), the plurality of middle lacing wires 1 are arranged at the position with the largest diameter at the outer side of the U-shaped end of the tube bundle 6, the plurality of side lacing wires 2 are arranged on the left side and the right side of the U-shaped end of the tube bundle 6, and the vibration damper is integrally welded on the upper baffle plate 7 through the plurality of middle lacing wires 1 and the plurality of side lacing wires 2.

The edge frame 3 is a rectangular frame with four corners and arc transition (the size of the arc is determined by the arrangement form of the tube bundle 6 and the gap between the outer edge of the arc and the inner diameter of the shell 5 of the U-shaped tube bundle end, the vibration-proof effect is poor when the gap is too large, and the installation of the shell 5 of the U-shaped tube bundle end is affected when the gap is too small).

The parting bead 4 is made of a thin steel plate with good toughness (the thickness is determined by the gap spacing between two adjacent heat exchange pipes, the thickness is too large and is not easy to be inserted into the gap, the thickness is smaller, the heat exchange pipes cannot be attached to the parting bead 4, and the vibration-proof effect is not ideal).

Example 1:

as shown in fig. 1-5, the edge frame 3 is first sleeved on the periphery of the tube bundle 6 before the tube bundle 6 is wrapped by the U-shaped tube bundle end shell 5, and the number of the edge frame is generally not less than 2 depending on the vibration intensity of the tube bundle 6; inserting the parting strips 4 into gaps of two adjacent heat exchange tubes one by one in sequence to enable the heat exchange tubes to be attached to the parting strips 4, and respectively welding two ends (an insertion end and a tube bundle extending end) of the parting strips 4 on the edge frame 3; adjacent two edge frames 3 are connected into a whole through a middle lacing wire 1 and side lacing wires 2, a plurality of middle lacing wires 1 are arranged at the position with the largest diameter at the outer side of the U-shaped end of the tube bundle 6, and a plurality of side lacing wires 2 are arranged at the left side and the right side of the U-shaped end of the tube bundle 6; the whole U-shaped end tube bundle vibration-proof device is welded and fixed with an upper baffle 7 at the tail end of the heat exchanger through a middle lacing wire 1 and a side lacing wire 2.

Working principle: the U-shaped end tube bundle of the hairpin heat exchanger is provided with the vibration isolator, so that each row of heat exchange tubes are tightly connected, namely, the parting strips 4 are respectively tightly attached to the two adjacent heat exchange tubes, so that a large gap does not exist between the two adjacent heat exchange tubes, the left and right swinging of the heat exchange tubes cannot occur even if the internal medium is disturbed severely, the vibration of the tube bundle 6 is further effectively prevented, and the upper part of the whole vibration isolator is only a fixed end (the upper part and the lower part are marked in the figures 1-4), thereby effectively solving the relative displacement and the thermal stress of the upper row and the lower row of tube bundles caused by different temperature differences.

The vibration-proof device at the tail end of the tube bundle of the hairpin heat exchanger is used in engineering at present, and has higher reliability.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (3)

1. A hairpin heat exchanger U type end tube bank vibration isolator which characterized in that: comprises a plurality of middle lacing wires (1), a plurality of side lacing wires (2), a plurality of edge frames (3) and a plurality of parting strips (4);

a plurality of edge frames (3) are sleeved on the periphery of the tube bundle (6), division bars (4) penetrate into gaps of two adjacent heat exchange tubes of the tube bundle (6), the division bars (4) are attached to the heat exchange tubes, two ends of parts, extending out of the tube bundle (6), of the division bars (4) are respectively lap welded on the corresponding edge frames (3), the two adjacent edge frames (3) are fixedly connected through a plurality of middle lacing wires (1) and a plurality of side lacing wires (2), the plurality of middle lacing wires (1) are arranged at the position with the largest diameter at the outer side of the U-shaped end of the tube bundle (6), the plurality of side lacing wires (2) are arranged at the left side and the right side of the U-shaped end of the tube bundle (6), and the vibration isolator is welded on the upper baffle plate (7) through the plurality of middle lacing wires (1) and the plurality of side lacing wires (2).

2. The hairpin heat exchanger U-shaped end tube bundle vibration isolator of claim 1 wherein: the edge frame (3) is a rectangular frame with four corners in arc transition.

3. A hairpin tube bundle vibration isolator for a hairpin heat exchanger according to claim 1 or 2 wherein: the parting bead (4) is made of thin steel plates.

Images