CN212006826U

CN212006826U - Embossed pipe heat exchanger

Info

Publication number: CN212006826U
Application number: CN202020378511.8U
Authority: CN
Inventors: 张树先
Original assignee: Daye Hecheng Heat Exchanger Co ltd
Current assignee: Daye Hecheng Heat Exchanger Co ltd
Priority date: 2020-03-23
Filing date: 2020-03-23
Publication date: 2020-11-24
Anticipated expiration: 2030-03-23

Abstract

The utility model discloses an embossing pipe heat exchanger, which comprises a shell and an embossing pipe, wherein the shell is of an internal hollow structure and is provided with a first cavity, a first liquid inlet and a first liquid outlet are respectively formed at the positions, close to the upper end, of the two ends of the side wall of the shell, the embossing pipe is of a hollow tubular structure and is provided with a second cavity, the embossing pipe is coaxial with the shell, the embossing pipe is arranged in the first cavity, the outer surface of the embossing pipe is uniformly provided with a first inner concave surface and a second inner concave surface which are arranged in a staggered way, the heat exchange area in the heat exchange process is effectively increased, and the outer wall of the embossing pipe is extruded into the first inner concave surface and the second inner concave surface, so that the cooling liquid close to the inner wall in the second cavity generates periodic disturbance, the flowing boundary layer and the heat transfer of the cooling liquid are damaged, and turbulent flow can be formed under the condition that the Reynolds number is smaller, thereby quickening the flow speed of the cooling liquid and further improving the heat exchange efficiency.

Description

Embossed pipe heat exchanger

Technical Field

The utility model relates to a indirect heating equipment field specifically is a knurling tubular heat exchanger.

Background

A heat exchanger is a device that transfers thermal energy from a high temperature fluid to a lower temperature fluid, thereby cooling the high temperature fluid and heating the low temperature fluid. The double-pipe heat exchanger has simple structure and freely increased and decreased heat transfer area, and is a concentric sleeve formed by connecting two standard pipes with different pipe diameters, wherein the outer part is called a shell side, and the inner part is called a pipe side. The two different media can flow in the shell side and the tube side in the opposite directions (or in the same 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 heat transfer coefficient of fluid in the heat exchanger is low, so that the total heat transfer coefficient of the double-pipe heat exchanger is low.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an knurling tubular heat exchanger to fluid convection heat transfer coefficient is low in the tubular heat exchanger who solves the aforesaid and mentions, the not high problem of heat exchange efficiency.

To achieve the above object, the present invention provides an embossed tube heat exchanger, including:

a housing and an embossed tube;

the embossing tube is of a hollow tubular structure and is provided with a second cavity, the embossing tube is coaxial with the shell, and the embossing tube is arranged in the first cavity of the shell; the outer surface of the embossing pipe is provided with a first concave surface and a second concave surface which are arranged in a staggered and spaced mode.

The utility model provides a pair of knurling tubular heat exchanger has following beneficial effect: the embossing pipe is coaxial with the shell, the embossing pipe is arranged in the first cavity, a first inner concave surface and a second inner concave surface are uniformly formed on the outer surface of the embossing pipe, the first inner concave surface and the second inner concave surface are arranged in a staggered mode, so that the heat exchange area between high-temperature liquid circulating in the shell and cooling liquid circulating in the embossing pipe is effectively increased, the outer wall of the embossing pipe is extruded into the first inner concave surface and the second inner concave surface, periodic disturbance is generated on the cooling liquid close to the inner wall of the second cavity, a flowing boundary layer and a heat transfer boundary layer of the cooling liquid are damaged, turbulence can be formed under the condition that the Reynolds number is small, the flow speed of the cooling liquid is accelerated, and the heat exchange efficiency is further improved; the circulation directions of the high-temperature liquid in the shell and the cooling liquid in the embossing pipe are opposite, so that the heat exchange process is accelerated, and the heat exchange effect is better.

Drawings

The accompanying drawings, which are described herein to provide a further understanding of the invention and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention without forming an undue limitation to the invention, in which:

fig. 1 is a schematic structural diagram of an embodiment of an embossed tube heat exchanger provided by the present invention;

fig. 2 is a schematic structural view of an embodiment of the middle embossed tube of the present invention.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more fully apparent from the following description and appended claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.

As shown in fig. 1-2, fig. 1 is a schematic structural diagram of an embodiment of an embossed tube heat exchanger provided by the present invention, and fig. 2 is a schematic structural diagram of an embodiment of an embossed tube heat exchanger provided by the present invention. The embossed tube heat exchanger comprises a shell 1 and an embossed tube 2, wherein the shell 1 is of an internal hollow structure and is provided with a first cavity 11, a first liquid inlet a1 and a first liquid outlet b1 are respectively formed on the same side of the shell 1, namely the positions of the side walls of the two ends of the shell 1, which are close to the upper end, the embossed tube 2 is of an internal hollow structure and is provided with a second cavity 21, the embossed tube 2 is coaxial with the shell 1, and the embossed tube 2 is arranged in the first cavity 11 of the shell 1; the outer surface of the embossed tube 2 is uniformly formed with a first inner concave surface 221 and a second inner concave surface 222, the first inner concave surface 221 and the second inner concave surface 222 are arranged in a staggered manner and are arranged at intervals, the first inner concave surface 221 and the second inner concave surface 222 effectively increase the heat exchange area in the heat exchange process, namely, the embossed tube 2 is used as a cooling tube in a heat exchanger, cooling liquid flows in the second cavity 21, high-temperature liquid flows in the first cavity 11, the contact area of the high-temperature liquid and the outer surface of the embossed tube 2 in the flowing process is increased compared with that of a traditional round optical tube, on the other hand, the outer wall of the embossed tube 2 is extruded into the first inner concave surface 221 and the second inner concave surface 222, so that the cooling liquid close to the inner wall in the second cavity 21 generates periodic disturbance, the flowing boundary layer and the heat transfer of the cooling liquid are damaged, and turbulent flow can be formed under the condition that the Reynolds number is small, thereby quickening the flow speed of the cooling liquid and further improving the heat exchange efficiency.

Further, a second liquid inlet a2 is formed at the right end of the embossing tube 2, a second liquid outlet b2 is formed at the left end of the embossing tube 2, and the flow direction of the liquid in the first cavity 11 is opposite to the flow direction of the liquid in the second cavity 21, that is, the flow direction of the cooling liquid flowing through the embossing tube 2 is opposite to the flow direction of the high-temperature liquid flowing through the housing 1, so as to further improve the heat exchange efficiency.

Further, the first concave surface 221 and the second concave surface 222 are both formed by extrusion, and the first concave surface 221 and the second concave surface 222 are both arc-shaped pressing surfaces, and the forming process is as follows: and extruding a section of the outer surface of the circular tube into an inward concave surface with an arc surface facing inwards, thereby forming the embossed tube 2.

Further, the first concave surface 221 includes a first left concave surface and a first right concave surface, and the positions of the first left concave surface and the first right concave surface are in one-to-one correspondence; the second inner concave surface comprises a second upper inner concave surface and a second lower inner concave surface, and the positions of the second upper inner concave surface and the second lower inner concave surface correspond to each other one by one, so that the heat exchange area between the high-temperature liquid flowing in the embossing pipe 2 and the shell 1 is increased to the maximum extent.

Further, the clearance distance h between the maximum outer diameter of the embossing pipe 2 and the inner wall of the shell 1 is 5mm-10mm, so that incomplete heat exchange caused by too much high-temperature liquid in circulation is avoided.

During the concrete implementation, when the first inlet a1 of casing 1 carried high temperature liquid, in the second inlet a2 transport coolant liquid of embossing tube 2, the inside circulating high temperature liquid of first cavity 11 contacted with embossing tube 2's surface and realized flowing out in first outlet b1 behind the heat transfer, the inside circulating coolant liquid of second cavity 21 flowed out in second outlet b2 behind the heat transfer, realized the heat transfer between coolant liquid and the high temperature liquid from this.

The utility model provides an embossing tube heat exchanger, it includes casing and embossing tube, the casing is the hollow structure of inside and is formed with first cavity, the position that the lateral wall both ends of casing are close to the upper end forms first inlet and first liquid outlet respectively, embossing tube is the hollow tubular structure of inside and is formed with the second cavity, embossing tube and casing are coaxial and embossing tube sets up in the first cavity, embossing tube's surface evenly forms first interior concave surface and second interior concave surface, first interior concave surface and second interior concave surface staggered arrangement, first interior concave surface and second interior concave surface have effectively increased the heat transfer area in the heat transfer process, and embossing tube's outer wall is because of being extruded into first interior concave surface and second interior concave surface, so the coolant liquid that is close to its inner wall in the second cavity produces periodic disturbance, the flow boundary layer and the heat transfer boundary layer of coolant liquid have been destroyed, under the condition that the reynolds number is less, turbulence can be formed, so that the flow speed of the cooling liquid is accelerated, and the heat exchange efficiency is further improved; the circulation directions of the high-temperature liquid in the shell and the cooling liquid in the embossing pipe are opposite, so that the heat exchange process is accelerated, and the heat exchange effect is better.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the present invention can be smoothly implemented by those skilled in the art according to the drawings and the above description; however, those skilled in the art should understand that changes, modifications and variations made by the above-described technology can be made without departing from the scope of the present invention, and all such changes, modifications and variations are equivalent embodiments of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. An embossed tube heat exchanger, comprising:

a housing and an embossed tube;

2. The embossed tube heat exchanger of claim 1, wherein: and a second liquid inlet and a second liquid outlet are formed at two ends of the embossing pipe respectively, and the flow direction of the liquid in the first cavity is opposite to that of the liquid in the second cavity.

3. The embossed tube heat exchanger of claim 1, wherein: the first concave surface and the second concave surface are both extruded and formed, and the first concave surface and the second concave surface are both arc-shaped pressing surfaces.

4. The embossed tube heat exchanger of claim 1, wherein: the first concave surface comprises a first left concave surface and a first right concave surface, and the positions of the first left concave surface and the first right concave surface are in one-to-one correspondence; the second concave surface comprises a second upper concave surface and a second lower concave surface, and the positions of the second upper concave surface and the second lower concave surface are in one-to-one correspondence.