CN218723334U

CN218723334U - Hairpin heat exchanger

Info

Publication number: CN218723334U
Application number: CN202223044642.0U
Authority: CN
Inventors: 莫修乾; 李杨威
Original assignee: Jiangsu Oriental Ruiji Energy Equipment Co ltd
Current assignee: Jiangsu Oriental Ruiji Energy Equipment Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-03-24
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a hairpin heat exchanger, which comprises a shell pass cylinder body and a tube box which are distributed at intervals at the left and the right, wherein a sealing component and a tube plate are arranged between the shell pass cylinder body and the tube box, and the sealing component comprises a shell pass flange, a clamp, a backing ring and a tube box flange; the periphery of the tube plate is provided with a groove, the backing ring is arranged in the groove, and the clamp sleeve is arranged on the periphery side surface of the tube plate and abuts against the outer side surface of the backing ring; the shell side flange is detachably and fixedly connected with the shell side cylinder body, and the tube box flange is detachably and fixedly connected with the tube box. The utility model provides a pipe plate periphery side is opened there is the ring channel to but backing ring card among the seal assembly goes into in the ring channel, and can connect and seal between shell Cheng Tongti and the pipe case under the cooperation use between clamp and sealing ring and pipe case flange, the shell side flange, is to dismantle the connection between shell side barrel, seal assembly, pipe sheet and the pipe case moreover, is convenient for take out the tube bank.

Description

Hairpin heat exchanger

Technical Field

The utility model relates to a hairpin heat exchanger.

Background

Hairpin heat exchangers, also called hairpin heat exchangers, are devices that transfer part of the heat of a hot fluid to a cold fluid. A hairpin heat exchanger is simply a single pass shell and tube heat exchanger, bent in the middle into the shape of a hairpin. The primary technical advantage of the hairpin heat exchanger is that pure counterflow can be achieved, a large bending radius of the ends is present, and expansion joints are not required even under the most unfavorable combination of pressure and temperature conditions.

The large bending radius of the hairpin type heat exchanger U-shaped pipe can bear higher thermal expansion, the pure countercurrent enables the heat transfer efficiency to be higher, the same heat exchange effect is achieved, the appearance shell can be made smaller, the number of heat exchange pipes is less, therefore, the manufacturing cost is not reduced, and the hairpin type heat exchanger U-shaped pipe is more suitable for high-pressure working conditions (especially pipe pass high pressure).

The hairpin heat exchanger has the advantages that the tube bundle can be drawn out and cleaned, but the structure of the existing hairpin heat exchanger is generally as follows: the tube box and the tube body are welded on the tube plate, sealing is realized through the stuffing box, the stuffing box needs to have sealing property, the gap between the tube plate and the flange cannot be too large, generally about 1mm, good sealing effect can be achieved, the tube bundle is difficult to draw out of the equipment due to too small gap, meanwhile, the tube box and the tube plate are welded into a whole, the coaxiality of the welded tube box and the tube plate is required to be very high to ensure the whole pipe bundle to be drawn out of the equipment, and factors such as out-of-roundness and the like also exist in the shell pass tube body even if the coaxiality of the tube box is ensured.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a hairpin heat exchanger, through changing seal structure, make the clearance between tube sheet and the flange need not the undersize, be convenient for take the tube bank out.

The purpose of the utility model can be achieved by adopting the following technical scheme:

a hairpin heat exchanger comprises a shell pass cylinder and a tube box which are distributed at intervals at the left and right, wherein a sealing assembly and a tube plate are arranged between the shell pass cylinder and the tube box, and the sealing assembly comprises a shell pass flange, a hoop, a backing ring and a tube box flange;

the periphery of the tube plate is provided with a groove, the backing ring is arranged in the groove, and the clamp sleeve is arranged on the periphery side face of the tube plate and abuts against the outer side face of the backing ring;

the shell side flange is detachably and fixedly connected with the shell side cylinder, and the tube box flange is detachably and fixedly connected with the tube box;

the clamp is detachably fixed between the shell side flange and the channel box flange.

Preferably, the sealing assembly further comprises two sealing rings which are distributed at intervals from left to right, wherein one sealing ring is positioned on the left side of the backing ring, and the other sealing ring is positioned on the right side of the clamping hoop.

Preferably, the device also comprises a rear end cover, the two end parts of the rear end cover are respectively provided with a shell pass cylinder body,

a long circular flange and a tail flange are sequentially arranged between the rear end cover and the shell pass cylinder body,

the shell pass cylinders on the rear end cover are distributed at intervals from top to bottom, wherein the shell pass cylinder positioned above is provided with a shell pass inlet, the shell pass cylinder positioned below is provided with a shell pass outlet,

the right end of each shell pass cylinder body is provided with a tube box, the tube box positioned above is provided with a tube pass outlet, and the tube box positioned below is provided with a tube pass inlet.

Preferably, a support is arranged on the outer side of the shell-side cylinder.

Preferably, the groove on the tube plate is an annular groove, and the width of the annular groove is smaller than the width of the outer peripheral surface of the tube plate.

Preferably, a distance is reserved between the left side of the annular groove and the left side of the tube plate and between the right side of the annular groove and the right side of the tube plate.

Preferably, the backing ring comprises two separable semi-circular rings.

Preferably, a tube bundle is arranged on the inner side of the shell side cylinder.

The utility model has the advantages of:

1. the utility model provides an do not adopt welded fastening between pipe case in the heat exchanger and the tube sheet, reduced tube sheet welded axial length, replace the packing with seal assembly in the heat exchanger moreover and seal, make the tube sheet diameter can reduce, created convenient condition for taking out the tube bank.

2. The utility model provides a pipe plate periphery side is opened there is the ring channel to but backing ring card among the seal assembly goes into in the ring channel, and can connect and seal between shell Cheng Tongti and the pipe case under the cooperation use between clamp and sealing ring and pipe case flange, the shell side flange, is to dismantle the connection between shell side barrel, seal assembly, pipe sheet and the pipe case moreover, is convenient for take out the tube bank.

Drawings

Fig. 1 is a schematic cross-sectional view of a hairpin heat exchanger according to an embodiment of the invention;

fig. 2 is an enlarged schematic view of a portion of a seal assembly according to an embodiment of the present invention.

In the figure: 1-rear end cover, 2-long circular flange, 3-tail flange, 4-support, 5-tube bundle, 6-shell side cylinder, 7-sealing component, 701-shell side flange, 702-sealing ring, 703-clamping hoop, 704-backing ring, 705-tube box flange, 8-tube box, 9-tube plate, 11-shell side inlet, 12-tube side outlet, 13-tube side inlet and 14-shell side outlet.

Detailed Description

In order to make the technical solutions of the present invention clearer and clearer for those skilled in the art, the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

As shown in fig. 1-2, the hairpin heat exchanger provided in this embodiment includes a rear end cover 1, an oblong flange 2, a tail flange 3, a shell-side cylinder 6, and a tube box 8, which are connected in sequence from left to right, the rear end cover 1 is in a U-shaped structure,

the tube bundle 5 is arranged on the inner side of the shell-side cylinder 6, the tail part of the tube bundle 5 is of a U-shaped structure and is arranged on the inner sides of the rear end cover 1 and the long circular flange 2, two shell-side cylinders 6 are arranged and are distributed at intervals up and down, one end of the rear end cover 1 corresponds to one shell-side cylinder 6, a shell-side inlet 11 is arranged on the upper shell-side cylinder 6, and a shell-side outlet 14 is arranged on the lower shell-side cylinder 6;

the number of the tube boxes 8 is two, the right end of each shell-side cylinder 6 corresponds to one tube box 8, the tube box 8 positioned above is provided with a tube-side outlet 12, the tube box 8 positioned below is provided with a tube-side inlet 13, a tube-side medium enters the heat exchanger from the tube-side inlet 13, and a shell-side medium enters the heat exchanger from the shell-side inlet 11 in the opposite direction of the tube-side medium, so that counter flow can be realized, and high heat exchange efficiency is achieved;

a sealing assembly 7 and a tube plate 9 are arranged between the shell-side cylinder 6 and a corresponding tube box 8;

the sealing assembly 7 comprises a shell side flange 701, a sealing ring 702, a clamping hoop 703, a backing ring 704 and a channel box flange 705;

an annular groove is formed in the outer peripheral surface of the tube plate 9, the backing ring 704 is arranged in the annular groove, and the clamp 703 is sleeved on the peripheral side surface of the tube plate 9 from the right side and abuts against the outer side surface of the backing ring 704 to ensure that the clamp 703 can clamp the backing ring 704;

the shell side flange 701 is detachably and fixedly connected with the shell side cylinder body 6, the channel box flange 705 is detachably and fixedly connected with the channel box 8, the hoop 703 is detachably fixed between the shell side flange 701 and the channel box flange 705, and the detachable and fixed connection can be realized through bolts and nuts.

In this embodiment, the backing ring 704 may be cut in half and snapped into a groove on the tube sheet 9, the clamp 703 is fitted over the tube sheet 9 from the right side and the backing ring 704 is snapped, then the two sealing rings 702 are respectively placed on both sides of the backing ring 704 and the clamp 703, and finally the tube-side cylinder 6 and the tube box 8 are connected and sealed by the forced pre-tightening force of the shell-side flange 701 and the tube box flange 705.

In this embodiment, after the bolts of the rear end cap 1, the oblong flange 2 and the sealing assembly 7 are loosened, respectively, the tube bundle 5 can be drawn out from the left side to clean the tube bundle 5.

In this embodiment, as shown in fig. 1, the sealing assembly 7 further includes two sealing rings 702 spaced from each other at left and right sides, where one of the sealing rings 702 is located at the left side of the backing ring 704, and the other sealing ring 702 is located at the right side of the clamping band 703, and may further perform the functions of limiting, sealing, and the like, and the sealing ring 702 may be a metal ring.

In the present embodiment, as shown in fig. 1, a bracket 4 is provided on the outer side of the shell-side cylinder 6 for supporting the heat exchanger.

In the present embodiment, as shown in fig. 1, the width of the annular groove on the tube plate 9 is smaller than the width of the outer peripheral surface of the tube plate 9, and a distance is left between the left side of the annular groove and the left side of the tube plate 9 and between the right side of the annular groove and the right side of the tube plate 9, so as to ensure that the backing ring 704 is clamped in the annular groove without left-right deviation, and the backing ring 704 may be a rubber ring.

In this embodiment, as shown in FIG. 1, the backing ring 704 includes two separable semi-toroidal bodies that facilitate placement within the annular groove.

In summary, in the present embodiment, the peripheral side surface of the tube plate 9 provided by the present embodiment is provided with an annular groove, and the backing ring 704 in the sealing assembly can be clamped into the annular groove, and the shell Cheng Tongti and the tube box 8 can be connected and sealed under the matching use between the clamping hoop 703 and the sealing ring 702, and the tube box flange 705 and the shell side flange 701, and the shell side cylinder 6, the sealing assembly 7, the tube plate 9 and the tube box 8 are detachably connected, so that the tube bundle can be conveniently extracted.

The above description is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can replace or change the technical solution and the concept of the present invention within the scope of the present invention.

Claims

1. A hairpin heat exchanger which characterized in that: the device comprises a shell-side cylinder body (6) and a tube box (8) which are distributed at intervals at left and right, wherein a sealing assembly (7) and a tube plate (9) are arranged between the shell-side cylinder body (6) and the tube box (8), and the sealing assembly (7) comprises a shell-side flange (701), a hoop (703), a backing ring (704) and a tube box flange (705);

a groove is formed in the peripheral surface of the tube plate (9), the backing ring (704) is arranged in the groove, and the hoop (703) is sleeved on the peripheral side surface of the tube plate (9) and abuts against the outer side surface of the backing ring (704);

the sealing assembly (7) further comprises two sealing rings (702) which are distributed at intervals from left to right, wherein one sealing ring (702) is positioned on the left side of the backing ring (704), and the other sealing ring (702) is positioned on the right side of the clamping hoop (703);

the shell-side flange (701) is detachably and fixedly connected with the shell-side cylinder (6), and the tube box flange (705) is detachably and fixedly connected with the tube box (8);

the clamp (703) is detachably fixed between the shell side flange (701) and the channel box flange (705).

2. A hairpin heat exchanger as claimed in claim 1 wherein: and a tube bundle (5) is arranged on the inner side of the shell pass cylinder (6).

3. A hairpin heat exchanger according to claim 2, characterized in that: also comprises a rear end cover (1), wherein both ends of the rear end cover (1) are provided with shell pass cylinders (6),

a long circular flange (2) and a tail flange (3) are sequentially arranged between the rear end cover (1) and the shell side cylinder body (6),

the shell-side cylinders (6) on the rear end cover (1) are distributed at intervals from top to bottom, wherein the shell-side cylinder (6) positioned above is provided with a shell-side inlet (11), the shell-side cylinder (6) positioned below is provided with a shell-side outlet (14),

the right end of each shell side cylinder body (6) is provided with a tube box (8), the tube box (8) positioned above is provided with a tube side outlet (12), and the tube box (8) positioned below is provided with a tube side inlet (13).

4. A hairpin heat exchanger according to claim 3, characterized in that: and a support (4) is arranged on the outer side of the shell pass cylinder (6).

5. The hairpin heat exchanger of claim 1, wherein: the groove on the tube plate (9) is an annular groove, and the width of the annular groove is smaller than the width of the outer peripheral surface of the tube plate (9).

6. A hairpin heat exchanger according to claim 5, characterized in that: and spaces are reserved between the left side of the annular groove and the left side of the tube plate (9) and between the right side of the annular groove and the right side of the tube plate (9).

7. The hairpin heat exchanger of claim 1, wherein: the backing ring (704) includes two separable semi-toroidal bodies.