CN211047256U

CN211047256U - Double-sided heat exchange cast aluminum type electric heater

Info

Publication number: CN211047256U
Application number: CN201921866488.0U
Authority: CN
Inventors: 赵延炜; 杨萍; 徐金华
Original assignee: Zhenjiang Dongfang Electric Heating Technology Co ltd
Current assignee: Zhenjiang Dongfang Electric Heating Technology Co ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-07-17
Anticipated expiration: 2029-11-01

Abstract

The utility model discloses a two-sided heat transfer cast aluminium formula electric heater. The medium circulation device comprises an outer shell and an inner pipeline, heating pipes are uniformly distributed between the outer shell and the inner pipeline, the heating pipes are positioned and installed through supporting pieces and are isolated from the inner pipeline, a pressure-bearing pipe fitting is sleeved on the periphery of each heating pipe, cast aluminum materials are filled between the inner pipeline and the pressure-bearing pipe fitting, a medium circulation channel is formed between the outer shell and the pressure-bearing pipe fitting, and a medium can pass through a central cavity of the inner pipeline and enter the medium circulation channel to circulate. After adopting above-mentioned structure, through indirect heat transfer, keep apart heating element and heated medium, do not contact, fine assurance the security of equipment, cast the two-sided heat transfer of aluminium material simultaneously, very big increase the heat transfer area of heater, promoted cast the whole heat exchange efficiency of aluminium formula heater by a wide margin, can wash away the washing comprehensively, clear away the impurity on pipeline surface, its long service life, safe explosion-proof, heat exchange efficiency is high, dismouting washing convenience and application scope are wide.

Description

Double-sided heat exchange cast aluminum type electric heater

Technical Field

The utility model relates to an electric heater, specifically speaking are two-sided heat transfer cast aluminium formula electric heater.

Background

At present, conventional heater is heating element (electric heating pipe) usually and is heated medium direct contact heat transfer on the market, when heated medium impurity is more, impurity can adsorb and lead to the intraductal temperature zone not to go out on the heating pipe surface, the time will take place to explode the pipe phenomenon for a long time, impurity also can lead to the damage of pipe wall to the impact of heating pipe simultaneously, after these two kinds of circumstances take place, the medium all can scurry in the terminal box along the magnesium powder clearance in the heating pipe, there is very big potential safety hazard, in addition, present heater, still there is bulky, the consumptive material is many, heat transfer area is little, defects such as heat exchange efficiency is not high.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a small in size, safe explosion-proof, heat exchange efficiency is high, long service life's two-sided heat transfer cast aluminium formula electric heater.

In order to solve the technical problem, the utility model discloses a two-sided heat transfer cast aluminium formula electric heater, including the shell body with be located the shell body in with the coaxial inner tube way that sets up of shell body, the heating pipe of evenly having arranged between shell body and the inner tube way, the heating pipe advance line location installation and with the inner tube way between keep apart through support piece, the peripheral cover of heating pipe has the pressure-bearing pipe fitting, it has the cast aluminium material that carries out the cladding seal with the heating pipe to fill between inner tube way and the pressure-bearing pipe fitting, form medium circulation passageway between shell body and the pressure-bearing pipe fitting, the medium can circulate in passing through and entering into medium circulation passageway from.

One end of the pressure-bearing pipe fitting is welded and fixed with one pipe plate, and the other end of the pressure-bearing pipe fitting is welded and sealed by a forge piece after the cast aluminum material is filled.

And an air section is reserved between the forging and the cast aluminum material.

The outer shell is coated with a heat-insulating layer.

The end part of the outer shell is provided with a flange, and the flange is hermetically mounted with the tube plate.

The heating pipe is installed in the junction box through a sleeve, and the inner pipeline extends out of the junction box and is provided with an air inlet pipeline assembly.

The heat preservation layer is installed through a heat preservation layer support arranged on the outer shell.

After adopting the structure, because the shell body, the inner pipeline and the heating pipe are arranged, cast aluminum materials are filled between the inner pipeline and the pressure-bearing pipe fitting, the electric heating pipe is completely wrapped, the electric heating pipe is isolated from a heated medium through the cast aluminum materials and is not in direct contact with the heated medium, a medium circulation channel is formed between the shell body and the pressure-bearing pipe fitting, heat is simultaneously radiated from the inner layer and the outer layer of the heater at the two sides, heat exchange to the circulation medium is completed through the double-side contact with the medium, the structure design is ingenious, the heating element is isolated from the heated medium through indirect heat transfer and is not in contact with the heated medium, the safety of equipment is well ensured, meanwhile, the double-side heat transfer of the cast aluminum materials is realized, the heat exchange area of the heater is greatly increased, the whole heat exchange efficiency of the cast aluminum type heater is greatly improved, in addition, Outer pipeline carries out comprehensive washing respectively and washs, clears away the impurity on pipeline surface, and its long service life, safe explosion-proof, heat exchange efficiency is high, and dismouting washing convenience and application scope are wide, complex operating mode such as specially adapted oil and gas well head (high pressure, medium impurity are more).

Drawings

Fig. 1 is a schematic view of a heating structure of a double-sided heat exchange cast aluminum electric heater according to the present invention;

FIG. 2 is a schematic view of the whole structure of the double-sided heat exchange cast aluminum electric heater of the present invention;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 4 is an enlarged view of the structure at B of FIG. 1;

fig. 5 is a schematic view of the cross-sectional structure C-C of fig. 1.

Detailed Description

The double-sided heat exchange cast aluminum electric heater of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in the figures, the double-sided heat exchange cast aluminum type electric heater of the utility model is a double-sided heat exchange cast aluminum type heater developed aiming at high-pressure dangerous environments such as natural gas well mouth, and the like, which comprises an outer shell 1 and an inner pipeline 2 which is positioned in the outer shell and is coaxially arranged with the outer shell, heating pipes 3 are evenly distributed between the outer shell 1 and the inner pipeline 2, the heating pipes 3 are positioned and installed through supporting pieces 4 and are isolated from the inner pipeline, namely the heating pipes are evenly distributed around the inner pipeline, the heating pipes are isolated from the surface of the inner pipeline by using the supporting pieces, a pressure-bearing pipe fitting 5 is sheathed on the periphery of the heating pipes 3, cast aluminum materials 6 for coating and sealing the heating pipes 3 are filled between the inner pipeline 2 and the pressure-bearing pipe fitting 5, thereby forming a cast aluminum layer, one end of the pressure-bearing pipe fitting 5 is welded and fixed with a, through this structure, after 3 through cast aluminium material 6 seals with the heating pipe, form medium circulation passageway 7 between shell body 1 and the pressure-bearing pipe fitting 5, the cast aluminium layer at this moment has wrapped the heating pipe completely, the heating pipe is isolated with the medium of being heated through cast aluminium layer, direct contact not, the heater circular telegram, electric heating pipe begins to generate heat, the medium can be followed in the 2 center cavity of interior pipeline through and circulate in entering into medium circulation passageway 7, the heat is gived off simultaneously to the two sides, because the good heat conduction characteristic of aluminium, the temperature absorption with the heating pipe table that can be very quick, the pipe wall of pipe wall and the pipe wall of middle level pipeline (pressure-bearing pipe fitting 5) of interior pipeline is given in the transmission simultaneously, through the double-sided contact with: the circulating medium is contacted with the pipe wall of the inner pipeline and the pipe wall of the outer pipeline to complete heat exchange of the circulating medium.

Furthermore, a heat-insulating layer support 16 is arranged on the outer shell, and a heat-insulating layer 11 which is arranged through the heat-insulating layer support 16 arranged on the outer shell is coated outside the outer shell 1; the end of the outer shell 1 is provided with a flange 12, the flange 12 is hermetically mounted with the tube plate 8, the heating tube 3 is mounted in a junction box 14 through a sleeve 13, the inner pipeline 2 extends out of the junction box and is provided with an air inlet pipeline assembly 15, that is, the outer shell 1 and the pressure-bearing tube 5 are hermetically mounted with the tube plate 8 through the flange 12, meanwhile, the outer circumferential surface of the pressure-bearing tube 5 is welded with a plurality of support rings 17, through the mounting structure, a heating core element (comprising the inner pipeline, the heating tube, the pressure-bearing tube and other components to form the heating core element) can be dismounted and extracted at any time, the inner layer, the middle layer and the outer layer pipelines are respectively washed and cleaned comprehensively, impurities on the surface of the pipeline are removed, thereby having the characteristic of convenient maintenance, in addition, a section of air section 10 reserved between the forging 9 and the cast aluminum material 6 forms, furthermore, a K-index thermocouple is led out between the inner pipeline 2 and the pressure-bearing pipe fitting 5.

Claims

1. The utility model provides a two-sided heat transfer cast aluminium formula electric heater, includes shell body (1) and is located interior pipeline (2) of the coaxial setting of shell body in the shell body, its characterized in that: heating pipe (3) have evenly arranged between shell body (1) and inner pipeline (2), heating pipe (3) are fixed a position through support piece (4) and are installed and keep apart between the inner pipeline, the peripheral cover of heating pipe (3) has pressure-bearing pipe fitting (5), it has cast aluminium material (6) that carry out the cladding with heating pipe (3) to fill between inner pipeline (2) and pressure-bearing pipe fitting (5), form medium circulation passageway (7) between shell body (1) and pressure-bearing pipe fitting (5), the medium can be followed inner pipeline (2) central cavity and passed through and entered into in medium circulation passageway (7) and circulate.

2. The double-sided heat exchange cast aluminum electric heater according to claim 1, characterized in that: one end of the pressure-bearing pipe fitting (5) is welded and fixed with one pipe plate (8), and the other end of the pressure-bearing pipe fitting (5) is welded and sealed by a forge piece (9) after the cast aluminum material is filled.

3. A two-sided heat exchange cast aluminum electric heater according to claim 2, wherein: an air section (10) is reserved between the forging (9) and the cast aluminum material (6).

4. A two-sided heat exchange cast aluminum electric heater as claimed in claim 1, 2 or 3, wherein: the outer shell (1) is coated with a heat-insulating layer (11).

5. A two-sided heat exchange cast aluminum electric heater according to claim 2, wherein: the end part of the outer shell (1) is provided with a flange (12), and the flange (12) and the tube plate (8) are installed in a sealing mode.

6. A two-sided heat exchange cast aluminum electric heater as claimed in claim 1, 2, 3 or 5 wherein: the heating pipe (3) is installed in a junction box (14) through a sleeve (13), and the inner pipeline (2) extends out of the junction box and is provided with an air inlet pipeline assembly (15).

7. The double-sided heat exchange cast aluminum electric heater according to claim 4, characterized in that: the heat-insulating layer (11) is installed through a heat-insulating layer bracket (16) arranged on the outer shell.