CN216245091U

CN216245091U - Tube bundle assembly adopting enclosure heat exchange mode for heating

Info

Publication number: CN216245091U
Application number: CN202122125598.5U
Authority: CN
Inventors: 王连胜; 许亮; 焦洁
Original assignee: Hangzhou Zuopasi Industry Co ltd
Current assignee: Hangzhou Zuopasi Industry Co ltd
Priority date: 2021-09-04
Filing date: 2021-09-04
Publication date: 2022-04-08
Anticipated expiration: 2031-09-04

Abstract

The utility model relates to a heating pipe heat exchange technology, and aims to provide a tube bundle assembly for heating in a surrounding heat exchange mode. The tube bundle assembly comprises a medium pipeline and an electric heating tube, wherein the electric heating tube is provided with an arc-shaped inner side surface matched with the outer surface of the medium pipeline, and the electric heating tube and the medium pipeline are relatively attached. The utility model greatly increases the contact area between the electric heating pipe and the medium pipeline; therefore, the product can meet the heating requirement only with lower power, and the use cost is greatly reduced. The material is easier to bend and form during processing, and meets the heat exchange requirement of the maximum contact surface; meanwhile, the copper shell can greatly improve the heat conduction efficiency and uniformity of the product, and greatly prolong the service life. The quick-plug terminal is mounted at the tail of the electric heating pipe, so that the installation operation can be conveniently and efficiently carried out. The method is not only suitable for heating scenes of refrigerating media in the absorption refrigerator refrigerating system, but also suitable for heating requirements of hot runner nozzles of injection molding machines, steam generators and the like.

Description

Tube bundle assembly adopting enclosure heat exchange mode for heating

Technical Field

The utility model relates to a heating pipe heat exchange technology, in particular to a pipe bundle assembly for heating in a surrounding heat exchange mode.

Background

At present, most of absorption refrigerator refrigeration medium pipelines on the market utilize electric heating tubes to realize heating (as shown in figure 1), and particularly, a medium pipeline 4 for circulating refrigeration medium and the electric heating tubes 5 are bundled together by tools such as hoops and the like. In such a heating scheme, the medium pipeline 4 and the electrothermal tube 5 can only realize heat conduction through a tangent line contact; the heating efficiency is low, the heat loss is serious, and the large-area dry burning of the electric heater is easily caused, so that the service life of the product is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of overcoming the defects in the prior art and provides a tube bundle assembly for heating in a closed heat exchange mode.

In order to solve the technical problem, the solution of the utility model is as follows:

the utility model provides a tube bundle subassembly that adopts and encloses heat transfer mode to carry out heating, includes: the medium pipeline is used for conveying a flowing medium needing heat exchange and temperature rise; the electric heating pipe is used for being electrified to generate heat and exchanging heat with a flowing medium in the medium pipeline; the electric heating pipe is provided with an arc inner side surface which is matched with the outer surface of the medium pipeline, and the electric heating pipe and the medium pipeline are relatively jointed.

As an improvement, the bundle assembly further comprises a binding tool for fixing the medium pipe and the electric heating pipe so that the electric heating pipe surrounds the outside of the medium pipe without loosening.

As an improvement, the number of the electric heating pipes is one, the cross section of each electric heating pipe is arc-shaped, and the opening angle range is between 5 and 180 degrees; or the number of the electric heating pipes is 2-5, the cross section of each electric heating pipe is arc-shaped, and each electric heating pipe surrounds the medium pipeline at the center.

As an improvement, the binding tool is any one of a rolled belt, a pipe buckle, a hoop, an adhesive tape or an insulating layer.

As a modification, an insulating layer is arranged around the outside of the tube bundle assembly.

As an improvement, the electric heating pipe is a thin-wall copper special pipe, and the wall thickness of the electric heating pipe ranges from 3.5 mm to 4.5 mm.

As an improvement, the outer side wall part of the electric heating pipe is provided with a strip-shaped convex part which is arranged in a zigzag folding way, and a groove on the inner side of the convex part is used for embedding the resistance wire.

As an improvement, the tail part of the electric heating pipe is provided with a quick-plug terminal and a fireproof sheath which are used for being connected with an external power supply through a lead with a quick-plug connector.

As an improvement, a resistance wire is arranged in the electric heating pipe, and an insulating filler for conducting heat is filled in the electric heating pipe; the insulating filler is wire-wound mica or magnesium oxide powder.

As an improvement, the number of resistance wires in the electric heating pipe is 1-3.

Compared with the prior art, the utility model has the technical effects that:

1. the utility model adopts the arc copper special pipe as the outer wall of the electric heating pipe and the medium pipeline to jointly form the enclosed tube bundle assembly, thereby greatly increasing the contact area between the electric heating pipe and the medium pipeline; therefore, the product can meet the heating requirement only with lower power, and the use cost is greatly reduced.

2. In the product of the utility model, the electric heating pipe adopts a copper thin pipe, so that the electric heating pipe is easier to bend and form during processing, and the heat exchange requirement of the maximum contact surface is met; meanwhile, the copper shell can greatly improve the heat conduction efficiency and uniformity of the product, and greatly prolong the service life.

3. In the product of the utility model, the quick-plug terminal is arranged at the tail part of the electric heating pipe, so that the installation operation can be conveniently and efficiently carried out.

4. The product of the utility model is not only suitable for heating scenes of refrigerating media in an absorption refrigerator refrigerating system, but also suitable for heating requirements of injection molding machine hot runner nozzles, steam generators and the like.

Drawings

FIG. 1 is a schematic diagram of a prior art heating method for a medium pipe;

fig. 2 is a schematic structural diagram of the present invention.

Fig. 3-6 are schematic views of various implementations of the bundle assembly of the present invention.

Reference numerals in the drawings: an electric heating tube 1; the pipe bundle assembly 2, the insulating filler 3 and the medium pipeline 4; an electric heating tube 5; a resistance wire 6; and a wire 7.

Detailed Description

The following describes embodiments of the present invention in detail by way of specific examples.

As shown in fig. 2-6, the tube bundle assembly heated by enclosure heat exchange according to the present invention comprises: a medium pipe 4, an electric heating pipe 1 and a binding tool (not shown in the figure). The medium pipeline 4 is used for conveying a flowing medium which needs heat exchange and temperature rise; the electric heating pipe 1 is used for being electrified to generate heat and exchanging heat with a flowing medium in the medium pipeline 4; the electric heating pipe 1 is provided with an arc inner side surface which is adapted to the outer surface of the medium pipeline 4, and the two surfaces are oppositely attached; the binding tool is used for fixing the medium pipeline 4 and the electric heating pipe 1, so that the electric heating pipe 1 is enclosed outside the medium pipeline 4 and cannot be loosened. The binding tool can be any one of a rolled band, a pipe fastener, a hoop, an adhesive tape or a heat-insulating layer. When selecting to roll area, tube buckle, staple bolt, clamp or adhesive tape, should suit the heat preservation in order to reduce calorific loss at the tube bank subassembly. When the heat-insulating layer is used as a binding tool, the functions of binding and heat insulation can be realized simultaneously. The tail part of the electric heating pipe 1 is provided with a quick-plug terminal and a fireproof sheath which are used for being connected with an external power supply through a lead 7 with a quick-plug connector.

The electric heating tube 1 is a thin-wall copper special tube, and the wall thickness of the electric heating tube ranges from 3.5 mm to 4.5 mm. The outer side wall of the electric heating pipe 1 is provided with a strip-shaped convex part which is arranged in a zigzag folding mode, and a groove on the inner side of the convex part is used for embedding the resistance wire 6. The number of the resistance wires 6 can be set to 1-3 according to the requirement. The electric heating tube 1 is also filled with an insulating filler for conducting heat, in particular, a wire-wound mica or magnesium oxide powder.

The number of the electric heating tubes 1 can be set according to actual needs. For example, one of them may be selected, and the cross-sectional shape thereof is circular arc, and the opening angle ranges from 5 ° to 180 ° (as shown in fig. 3 and 4). Or, 2-5 electric heating pipes can be selected, the cross section of each electric heating pipe 1 is arc-shaped, and the medium pipe 4 is surrounded at the center (as shown in fig. 5 and 6). In consideration of the heating efficiency, the sum of the angular ranges of the outer surface of the medium pipe 4 exposed to the electric-heating pipe 1 should not be more than 180 °. When the number of the electric heating pipes 1 is only 1 and the opening angle ranges from 5 to 130 degrees (as shown in fig. 4), the medium pipe 4 can be restrained (nested combination) only by the electric heating pipes 1, and the binding tool can be omitted.

An example of a processing and manufacturing method of a product is as follows:

the utility model relates to a tube bundle assembly heated by a heat enclosing and exchanging mode, which comprises the following steps:

(1) a zigzag folded strip-shaped protruding part is formed on one side wall of the thin-walled copper pipe by extrusion through a die, and after a resistance wire is embedded in a groove on the inner side of the protruding part, insulating fillers are filled in the thin-walled copper pipe.

(2) And extruding the thin-wall copper pipe with the circular section into an arc-shaped copper special pipe by using an arc-shaped die, wherein the inner surface of the copper special pipe keeps in an arc shape, so that the electric heating pipe 1 is obtained. The quick-plug terminal and the fireproof sheath are installed at the tail of the electric heating pipe 1, and convenience and safety of circuit conduction are guaranteed.

(3) With the laminating of electric heating pipe 1's internal surface and medium pipeline 4's surface, utilize to tie up and tie up the instrument and wrap up the heat preservation after fixing both, perhaps directly tie up the instrument with the heat preservation and fix as tying up. This makes it possible to enclose the electric heating tube 1 outside the medium channel 4 without loosening and with less heat dissipation.

Fig. 2-6 show examples of enclosing the medium pipe 4 with different numbers of electric heating pipes 1 with different arc cross sections.

Example of a method of use of the product:

(1) the product is installed in an application scene (such as a refrigeration heat exchange area of an absorption refrigerator), and the electric heating tube 1 and a power supply of the product are quickly connected through the wiring terminal of the wiring harness assembly.

(2) After the medium pipeline 4 is filled with the cooling medium, the power supply of the electric heating pipe 1 is switched on according to the heating requirement. The resistance wire 6 is electrified to generate heat, and the heat is guided to the medium pipeline 4 through the inner side shell of the electric heating pipe 1.

The insulating filler (such as wire-wound mica) is used as a main component of the electric heater and plays roles of insulation and heat conduction; the copper shell of the electric heating pipe 1 has high heat conduction efficiency and is easy to form, and the wire winding mica in the electric heating pipe can be protected from functional damage caused by bending force. The product can meet the heating requirement of small-diameter pipelines of absorption refrigerators, can also ensure the uniformity of heating of the medium pipeline 4, and greatly prolongs the service life of the electric heater.

Claims

1. A tube bundle assembly heated by enclosure heat exchange, comprising:

the medium pipeline is used for conveying a flowing medium needing heat exchange and temperature rise;

the electric heating pipe is used for being electrified to generate heat and exchanging heat with a flowing medium in the medium pipeline; the electric heating pipe is provided with an arc inner side surface which is matched with the outer surface of the medium pipeline, and the electric heating pipe and the medium pipeline are relatively jointed.

2. The tube bundle assembly according to claim 1, further comprising a binding tool for fixing the medium tubes and the electric heating tubes so that the electric heating tubes are enclosed outside the medium tubes without being loosened.

3. The tube bundle assembly of claim 2, wherein the tie means is any one of a rolled tape, a tube clip, a hoop, a clamp, a glue strip, or an insulation layer.

4. The tube bundle assembly according to claim 1, wherein the number of the electric heating tubes is one, the cross-sectional shape thereof is a circular arc, and the opening angle ranges from 5 ° to 180 °; or the number of the electric heating pipes is 2-5, the cross section of each electric heating pipe is arc-shaped, and each electric heating pipe surrounds the medium pipeline at the center.

5. The bundle assembly according to claim 1, wherein an insulation layer is provided around the outside of the bundle assembly.

6. A tube bundle assembly according to claim 1, wherein the electrically heated tubes are thin walled copper profile tubes having a wall thickness in the range of 3.5 to 4.5 mm.

7. The bundle assembly according to claim 1, wherein the outer side wall portion of the electric heating tube has a bar-shaped projection portion zigzag-folded and arranged, and a groove on the inner side of the projection portion is used for embedding the resistance wire.

8. The bundle assembly according to claim 1, wherein the electric heating tube is provided at its rear portion with a quick-connect terminal and a fireproof sheath for connecting to an external power source through a wire with a quick-connect connector.

9. The bundle assembly according to claim 1, wherein the electrical heating tubes have resistance wires therein and are filled with an insulating filler for conducting heat; the insulating filler is wire-wound mica or magnesium oxide powder.

10. The tube bundle assembly according to claim 9, wherein the number of resistance wires in the electrical heating tube is 1-3.