CN209763819U

CN209763819U - Sleeve type heat exchanger

Info

Publication number: CN209763819U
Application number: CN201821919250.5U
Authority: CN
Inventors: 黄德斌
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2018-11-20
Filing date: 2018-11-20
Publication date: 2019-12-10
Anticipated expiration: 2028-11-20

Abstract

The utility model discloses a double pipe heat exchanger, the female joint comprises an outer pipe, arrange the outer tube in and with the inner tube of axle center with the outer tube, left end lid and the right-hand member lid of connection at the outer tube both ends, left end lid and right-hand member lid are run through respectively at the both ends of inner tube, left end lid department is equipped with tube side fluid inlet, right-hand member lid department is equipped with tube side fluid outlet, the outer tube both ends are equipped with shell side fluid inlet and shell side fluid outlet opposite with the fluidic flow direction of tube side respectively, the outer tube, form annular cavity between inner tube and left end lid and the right-hand member lid, the surface of inner tube is equipped with a plurality of annular diaphragm along the equidistant a plurality of through-hole that is equipped with of axial. The shell-side heat transfer area is increased by the arrangement of the annular diaphragm; the through holes on the annular membrane can be used for fluid to pass through, so that the shell-side fluid is mixed to a certain degree; the sawteeth on the periphery of the through hole increase the fluid turbulence, reduce the thickness of the laminar bottom layer and improve the convection heat transfer coefficient and the total heat transfer coefficient of the shell-side fluid.

Description

Sleeve type heat exchanger

Technical Field

The utility model belongs to the heat transfer equipment field, concretely relates to double pipe heat exchanger.

Background

Compared with a tube type heat exchanger, the double-tube heat exchanger has the advantages that the structure is simple, the heat transfer area is increased and decreased freely, the double-tube heat exchanger is formed by combining standard components, additional processing is not needed during installation, the heat transfer efficiency is high, the double-tube heat exchanger is a pure countercurrent type heat exchanger, the appropriate section size can be selected at the same time, the fluid speed is improved, the heat transfer coefficient of fluid on two sides is increased, and the double-tube heat exchanger is widely applied to the fields of scientific research and practical production. The device is a concentric sleeve formed by connecting two standard pipes with different pipe diameters, wherein the outside is called a shell pass, and the inside is called a pipe pass. Two different media can flow in the shell side and the tube side in a reverse direction to achieve the effect of heat exchange. At present, the inner pipe in the double-pipe heat exchanger is a smooth circular pipe, the pipe is generally made of metal materials such as copper, stainless steel and titanium, and the shell-side fluid has low heat transfer coefficient, so that the total heat transfer coefficient of the double-pipe heat exchanger is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a double pipe heat exchanger is equipped with the annular diaphragm of band saw dentate through-hole at the surface of inner tube, through the fluidic coefficient of heat transfer of convection in improving the annular space to improve the total coefficient of heat transfer of double pipe heat exchanger.

The utility model provides a solution of its technical problem is: the utility model provides a double pipe heat exchanger, include the outer tube, arrange in the outer tube with the inner tube of axle center, connect left end lid and the right-hand member lid at the outer tube both ends, the both ends of inner tube run through left end lid and right-hand member lid respectively, left end lid department is equipped with tube side fluid inlet, right-hand member lid department is equipped with tube side fluid outlet, the outer tube both ends are equipped with shell side fluid inlet and shell side fluid outlet opposite with the fluidic flow direction of tube side respectively, form annular cavity between outer tube, inner tube and left end lid and the right-hand member lid, the surface of inner tube is equipped with a plurality of annular diaphragm along the axial equidistant, be equipped with a plurality of through-hole along the circumferencial direction equidistant on the annular.

As a further improvement of the technical scheme, the periphery of the through hole is serrated.

as a further improvement of the technical scheme, the distance between the adjacent annular diaphragms is 10-50 mm.

As a further improvement of the technical scheme, the thickness of the annular diaphragm is 1-3 mm, and the annular diaphragm is made of steel.

As a further improvement of the above technical solution, the annular membrane is connected to the outer surface of the inner tube by welding.

As a further improvement of the above technical solution, the outer diameter of the annular diaphragm is smaller than the inner diameter of the outer tube.

As a further improvement of the technical scheme, the outer pipe and the inner pipe are both common steel pipes or stainless steel pipes.

The utility model has the advantages that: the utility model provides a sleeve type heat exchanger, the surface of inner tube is equipped with a plurality of annular diaphragms along the axial equidistant, has increased the heat transfer area of shell side fluid, the through-hole on the annular diaphragm can supply shell side fluid to pass through, makes the fluid realize the mixing of certain degree; the sawteeth on the periphery of the through hole increase the turbulence degree of the fluid, the through hole and the sawteeth enable the boundary layer on the outer surface of the inner pipe to be continuously updated, the thickness of the laminar bottom layer is reduced, the heat convection coefficient of the shell-side fluid is improved, and therefore the total heat transfer coefficient of the double-pipe heat exchanger is improved. The utility model discloses simple structure is difficult for the scale deposit, and easily unpicks and washes and maintain, but wide application in chemical industry, metallurgy, food and refrigeration trade have extensive market perspective.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the connection between the inner tube and the annular diaphragm of the present invention;

Reference numerals:

1. An outer tube; 2. an inner tube; 3. a left end cap; 4. a right end cap; 5. a tube-side fluid inlet; 6. a tube-side fluid outlet; 7. a shell-side fluid inlet; 8. a shell-side fluid outlet; 201. an annular diaphragm; 202. and a through hole.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The utility model discloses each technical feature in the creation can the interactive combination under the prerequisite that does not contradict conflict each other.

As shown in fig. 1 and 2, a double pipe heat exchanger includes an outer pipe 1, an inner pipe 2 disposed in the outer pipe 1 and coaxial with the outer pipe 1, and a left end cap 3 and a right end cap 4 connected to both ends of the outer pipe 1, where both ends of the inner pipe 2 respectively penetrate the left end cap 3 and the right end cap 4, a pipe-side fluid inlet 5 is disposed at the left end cap 3, a pipe-side fluid outlet 6 is disposed at the right end cap 4, a shell-side fluid inlet 7 and a shell-side fluid outlet 8 opposite to the flow direction of the pipe-side fluid are disposed at both ends of the outer pipe 1, an annular cavity is formed between the outer pipe 1, the inner pipe 2, the left end cap 3 and the right end cap 4, a plurality of annular diaphragms 201 are disposed at equal intervals along the axial direction on the outer surface of the inner pipe 2, and a plurality of through holes 202 are. The inner tube 2 is a smooth circular tube, the outer surface of the inner tube is provided with a plurality of annular membranes 201 at equal intervals along the axial direction, the heat exchange area of the shell-side fluid is increased, and the through holes 202 on the annular membranes 201 can be passed by the shell-side fluid, so that the fluid is mixed to a certain degree; the saw teeth around the through hole 202 increase the turbulence degree of the fluid, the through hole 202 and the saw teeth continuously update the boundary layer on the outer surface of the inner tube 2, the thickness of the laminar bottom layer is reduced, and the heat convection coefficient of the shell-side fluid is improved, so that the total heat transfer coefficient of the double-tube heat exchanger is improved.

In a further preferred embodiment, the distance between the adjacent annular membranes 201 is 10mm to 50 mm.

in a further preferred embodiment, the thickness of the annular diaphragm 201 is 1mm to 3mm, and the annular diaphragm is made of steel.

In a further preferred embodiment, the annular membrane 201 is connected to the outer surface of the inner tube 2 by welding.

As a further preferred embodiment, the outer diameter of the annular membrane 201 is smaller than the inner diameter of the outer tube 1.

In a further preferred embodiment, the outer tube 1 and the inner tube 2 are both made of a common steel tube or a stainless steel tube.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. The utility model provides a double pipe heat exchanger, include the outer tube, arrange in the outer tube with the inner tube of axle center, connect left end lid and the right-hand member lid at the outer tube both ends, the both ends of inner tube run through left end lid and right-hand member lid respectively, left end lid department is equipped with tube side fluid inlet, right-hand member lid department is equipped with tube side fluid outlet, the outer tube both ends are equipped with shell side fluid inlet and shell side fluid outlet opposite with the fluidic flow direction of tube side respectively, a serial communication port, form annular cavity between outer tube, inner tube and left end lid and the right-hand member lid, the surface of inner tube is equipped with a plurality of annular diaphragm along the axial equidistant, be equipped with a plurality of through-hole along the circumferencial direction equidistant on the.

2. The double pipe heat exchanger according to claim 1, wherein the periphery of the through-hole is serrated.

3. The double pipe heat exchanger according to claim 1, wherein a distance between the adjacent annular diaphragms is 10mm to 50 mm.

4. The double pipe heat exchanger according to claim 1, wherein the thickness of the annular membrane is 1mm to 3mm, and the material of the annular membrane is steel.

5. The double pipe heat exchanger according to claim 1, wherein the annular membrane is connected to the outer surface of the inner pipe by welding.

6. The double pipe heat exchanger according to claim 1, wherein an outer diameter of the annular diaphragm is smaller than an inner diameter of the outer pipe.

7. The double pipe heat exchanger according to claim 1, wherein the outer pipe and the inner pipe are both a plain steel pipe or a stainless steel pipe.