CN109855467B - Heat exchanger joint, joint manufacturing method and brazing method with heat exchanger core - Google Patents
Heat exchanger joint, joint manufacturing method and brazing method with heat exchanger core Download PDFInfo
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- CN109855467B CN109855467B CN201910195286.6A CN201910195286A CN109855467B CN 109855467 B CN109855467 B CN 109855467B CN 201910195286 A CN201910195286 A CN 201910195286A CN 109855467 B CN109855467 B CN 109855467B
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- Prior art keywords
- pipe
- heat exchanger
- joint
- welding
- stainless steel
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- 238000005219 brazing Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 title abstract description 15
- 238000003466 welding Methods 0.000 claims abstract description 46
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 31
- 239000010935 stainless steel Substances 0.000 claims abstract description 31
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052802 copper Inorganic materials 0.000 claims abstract description 30
- 239000010949 copper Substances 0.000 claims abstract description 30
- 239000002344 surface layer Substances 0.000 claims abstract description 19
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 41
- 239000007789 gas Substances 0.000 description 34
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 30
- 229910021529 ammonia Inorganic materials 0.000 description 16
- 238000000354 decomposition reaction Methods 0.000 description 15
- 239000003345 natural gas Substances 0.000 description 15
- 230000001681 protective effect Effects 0.000 description 10
- 239000002994 raw material Substances 0.000 description 7
- 229910001369 Brass Inorganic materials 0.000 description 6
- 239000010951 brass Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to the field of heat exchangers, in particular to a heat exchanger joint, a joint manufacturing method and a brazing method with a heat exchanger core body, wherein the heat exchanger joint comprises the following components: a main pipe with at least one end open; the welding pipe is fixedly connected with the side wall of the main pipe, the inner cavity of the welding pipe is communicated with the inner cavity of the main pipe, and at least the outer surface layer of the welding pipe is made of red copper. The welded pipe comprises a stainless steel pipe body and a red copper layer on the outer surface layer of the stainless steel pipe body. The welding pipe is fixedly connected with the side wall of the main pipe through the reinforcing pipe, the welding pipe is fixedly connected outside the reinforcing pipe, and the inner cavity of the reinforcing pipe is communicated with the inner cavity of the main pipe. The heat exchanger joint is low in cost, does not harm the environment, is safe to store, and a joint manufacturing method and a brazing method for the heat exchanger joint and a heat exchanger core body are provided.
Description
Technical Field
The invention relates to the field of heat exchangers, in particular to a heat exchanger joint, a joint manufacturing method and a brazing method with a heat exchanger core body.
Background
The Chinese gas wall-mounted furnace is an important component part of the Chinese heating traffic industry, china is an important country for world production, consumption and export of the gas wall-mounted furnace, accessory manufacturers of the Chinese gas wall-mounted furnace are all over the country, and the heat exchanger of one of the important components is realized domestication.
The wall-mounted gas equipment integrates multiple subjects of machinery, gas combustion, electronic automatic control, hydrodynamics, thermal engineering and the like, is small-sized gas equipment using combustible gas fuel, and can be an external indoor temperature controller so as to realize individual temperature regulation and achieve the aim of energy conservation. The gas wall hanging device has a strong household central heating function.
The gas wall hanging equipment mainly comprises a combustion system, a heating circulation system, a domestic hot water supply system, a safety protection and control system, a heat exchange system, a smoke exhaust system and the like. The heat exchanger of the heat exchange system mainly has two structures, one is a single-channel structure, and the other is a double-channel structure. The heat exchanger is formed by brazing a core made of red copper and a joint cast by integral brass at a temperature of about 850 ℃ in a protective atmosphere (ammonia decomposition gas).
Because the corresponding joint material is brass, the required protective atmosphere (ammonia decomposition gas) is strictly required in the brazing process, otherwise, the brazing quality is poor, and the follow-up series detection test cannot be passed. In order to prepare the ammonia decomposition protective atmosphere, the manufacturing enterprises must use ammonia as a raw material, but the ammonia is harmful to the environment, is stored and dangerous, and is definitely forbidden in partial areas under the current national policy of importance of environmental protection, so that the enterprises face the dilemma that continuous production cannot be carried out.
Disclosure of Invention
The invention aims to provide a heat exchanger joint with low cost, no harm to the environment, a joint manufacturing method and a brazing method with a heat exchanger core body, wherein the heat exchanger joint is safe to store.
The technical scheme adopted for solving the technical problems is as follows: a heat exchanger joint comprising:
a main pipe with at least one end open;
the welding pipe is fixedly connected with the side wall of the main pipe, the inner cavity of the welding pipe is communicated with the inner cavity of the main pipe, and at least the outer surface layer of the welding pipe is made of red copper.
The welded pipe comprises a stainless steel pipe body and a red copper layer on the outer surface layer of the stainless steel pipe body.
The welding pipe is fixedly connected with the side wall of the main pipe through the reinforcing pipe, the welding pipe is fixedly connected outside the reinforcing pipe, and the inner cavity of the reinforcing pipe is communicated with the inner cavity of the main pipe.
The reinforced pipe is made of stainless steel, and is integrally formed or welded with the main pipe.
The main pipe is provided with a wire head at least one opening end, and the main pipe is made of stainless steel.
The manufacturing method of the heat exchanger joint at least comprises the following steps:
step one, a through hole for connecting a welded pipe is formed in the side wall of a main pipe;
fixing one end of the welded pipe with a through hole formed in the side wall of the main pipe;
and thirdly, attaching a red copper material to the outer surface layer of the welded pipe.
The manufacturing method of the heat exchanger joint at least comprises the following steps:
step one, a through hole for connecting a welded pipe is formed in the side wall of a main pipe;
attaching a red copper material to the outer surface layer of the welding pipe;
and thirdly, fixing the welded pipe with the red copper material coating on the outer surface layer with the through hole on the side wall of the main pipe.
And secondly, adhering a red copper material to the outer surface layer of the welded pipe, and fixing the welded pipe with the red copper material coating on the outer surface layer with the through hole formed in the side wall of the main pipe, or fixing one end of the welded pipe with the through hole formed in the side wall of the main pipe, and adhering the red copper material to the outer surface layer of the welded pipe.
The main pipe and the welded pipe are made of stainless steel, the stainless steel pipe of the welded pipe is fixedly connected with the main pipe by high-temperature brazing welding at the temperature of 1000-1200 ℃, the red copper material coating outside the welded pipe is fixed with the stainless steel pipe by a hot plating process, and the process temperature of hot plating is 1000-1200 ℃.
The brazing method of the heat exchanger joint and the heat exchanger core body at least comprises the following steps:
firstly, splicing a heat exchanger joint with a red copper material attached to the surface of a joint part in a heat exchanger core body to be connected, wherein a gap of the spliced part meets the brazing welding requirement;
secondly, brazing and welding the inserted joint by using brazing filler metal at 800-900 ℃;
wherein the protective atmosphere required in the brazing welding process in the second step is ammonia decomposition gas or natural gas decomposition gas prepared by taking ammonia gas as a raw material.
The natural gas cracking gas is DX gas or RX gas.
The beneficial effects of the invention are as follows:
1. because the outer surface layer of the welded pipe is made of red copper, ammonia decomposition gas prepared by taking ammonia gas as a raw material is not needed to be used as protective atmosphere when the heat exchanger joint is brazed with the heat exchanger core body, but natural gas decomposition gas is used, and about 1/3 of the ammonia gas is used in cost;
2. natural gas belongs to a common clean new energy source, and accords with environmental protection policy and regulation; once the policy completely prohibits the storage and the use of ammonia, the natural gas enterprise is prevented from facing the dilemma of production stopping by the method;
3. under the condition that the protective atmosphere still adopts ammonia gas as the ammonia decomposition gas of raw materials preparation, the stainless steel material of this heat exchanger joint is lower for brass integral casting's heat exchanger joint cost and under the prerequisite of guaranteeing intensity, the stainless steel joint weight is lighter, and the heat absorption capacity is lower when welding, also lower to brazing equipment energy consumption, welding cost also reduces, and the heat exchanger core is red copper in addition, and the welding pipe 3 of joint is outer also to adhere to red copper, belongs to the welding of the same material, welds more easily.
Drawings
The invention will be further described with reference to the accompanying drawings of embodiments.
Fig. 1 is a perspective view of the heat exchanger joint.
In the figure: 1. a spinneret; 2. a main pipe; 3. welding the pipe; 4. the tube is reinforced.
Detailed Description
Example 1
The present embodiment provides a heat exchanger joint, comprising:
a main pipe 2, wherein at least one end of the main pipe 2 is opened;
the welding pipe 3, welding pipe 3 and the lateral wall fixed connection of being responsible for 2, welding pipe 3 inner chamber and be responsible for 2 inner chamber intercommunication, and welding pipe 3 at least the extexine material is red copper.
The manufacturing method of the heat exchanger joint of the embodiment is divided into two types, wherein one type of the two types of the heat exchanger joint at least comprises the following steps:
step one, a through hole for connecting a welding pipe 3 is formed on the side wall of a main pipe 2;
fixing one end of the welded pipe 3 with a through hole formed in the side wall of the main pipe 2;
and thirdly, attaching a red copper material to the outer surface layer of the welded pipe 3.
The other is at least the following steps:
step one, a through hole for connecting a welding pipe 3 is formed on the side wall of a main pipe 2;
step two, red copper materials are attached to the outer surface layer of the welding pipe 3;
and thirdly, fixing the welded pipe 3 with the outer surface layer provided with the red copper material coating with the through hole formed in the side wall of the main pipe 2.
The heat exchanger joint manufactured by the manufacturing method according to the embodiment, when brazed to the heat exchanger core, comprises at least the following steps:
firstly, splicing a heat exchanger joint with a red copper material attached to the surface of a joint part in a heat exchanger core body to be connected, wherein a gap of the spliced part meets the brazing welding requirement;
secondly, brazing and welding the inserted joint by using brazing filler metal at 800-900 ℃;
wherein the protective atmosphere required in the brazing welding process in the second step is natural gas cracking gas, in particular DX gas or RX gas of natural gas cracking.
The integral brass joint can only be welded under ammonia decomposition gas, but can not be welded by natural gas decomposition gas; in the embodiment, the outer surface layer of the welding pipe 3 is made of red copper, so that ammonia decomposition gas prepared by taking ammonia gas as a raw material is not required to be used as protective atmosphere when the heat exchanger joint is brazed with a heat exchanger core body, but natural gas decomposition gas is required to be used,
under the precondition that 20 cubic gas is needed for brazing, the following is adopted:
the cost of adopting ammonia decomposition gas needs: 40 yuan/hour of ammonia gas, 12 yuan/hour of electricity charge of the gas generator, and the cost is about 52 yuan/hour;
natural gas cracking gas is adopted: the natural gas is 6.6 yuan/hour, the electricity charge of the gas generator is 3 yuan/hour, and the cost is about 16.3 yuan/hour;
the cost of using natural gas is about 1/3 of that of using ammonia.
Ammonia is dangerous corrosive gas, has great harm to the environment and does not accord with the current environmental protection policy and regulation; natural gas belongs to a common clean new energy source, and accords with environmental protection policy and regulation; once the policy completely prohibits the storage and the use of ammonia, the natural gas enterprises are prevented from facing the dilemma of production stopping by the method.
Example 2
In this embodiment, the welded pipe 3 comprises a stainless steel pipe body and a red copper layer on the outer surface layer of the stainless steel pipe body based on embodiment 1, the main pipe 2 has a wire head 1 at least one opening end, and the main pipe 2 is made of stainless steel.
In the method for manufacturing the heat exchanger joint based on the structure described in this embodiment, the fixed connection between the stainless steel pipe body of the welded pipe 3 and the main pipe 2 is a high-temperature brazing welding at a temperature of 1000 ℃ to 1200 ℃, the red copper material coating outside the welded pipe 3 and the stainless steel pipe body are fixed by a hot-dip plating process, and the process temperature of the hot-dip plating is 1000 ℃ to 1200 ℃.
In this embodiment, since the welding tube 3 includes a stainless steel tube, the main tube 2 is also made of stainless steel, and a red copper layer is attached to the outer surface layer of the stainless steel tube, the protective atmosphere required in the brazing welding process in the step two of the brazing method for the heat exchanger joint and the heat exchanger core in this embodiment may still be ammonia gas obtained by using ammonia gas as a raw material.
Compared with a heat exchanger joint integrally cast by brass, the stainless steel welding joint of the embodiment has the advantages that the cost is reduced by 1.5 yuan/one;
under the precondition of ensuring the strength, the wall thickness of the stainless steel joint is thinner than that of brass, so that the stainless steel joint is lighter in weight, lower in heat absorption capacity during welding, lower in energy consumption of brazing equipment and lower in welding cost, the stainless steel joint can be welded under the protective atmosphere condition of ammonia decomposition gas or natural gas decomposition gas prepared by taking ammonia gas as a raw material, the core body of the heat exchanger is red copper, the red copper is adhered outside a welding pipe 3 of the joint, and the heat exchanger belongs to welding of the same material and is easier to weld.
Example 3
On the basis of the above embodiment, in this embodiment, the welded pipe 3 is fixedly connected with the side wall of the main pipe 2 through the reinforced pipe 4, the welded pipe 3 is fixedly connected outside the reinforced pipe 4, the inner cavity of the reinforced pipe 4 is communicated with the inner cavity of the main pipe 2, the reinforced pipe 4 is made of stainless steel, and the reinforced pipe 4 and the main pipe 2 are integrally formed or welded.
In this embodiment, the welded pipe 3 is fixed to the side wall of the main pipe 2 through the reinforcing pipe 4, so that a more firm structure between the welded pipe 3 and the main pipe 2 is ensured.
Claims (3)
1. Heat exchanger connects, characterized by: comprising
A main pipe (2), wherein at least one end of the main pipe (2) is open;
the welding pipe (3) is fixedly connected with the side wall of the main pipe (2) through the reinforcing pipe (4), and at least the outer surface layer of the welding pipe (3) is made of red copper;
the welding pipe (3) is fixedly connected outside the reinforcing pipe (4), and the inner cavity of the reinforcing pipe (4) is communicated with the inner cavity of the main pipe (2); the reinforced pipe (4) is made of stainless steel, and the reinforced pipe (4) and the main pipe (2) are integrally formed or welded;
the main pipe (2) and the welding pipe (3) are made of stainless steel, the stainless steel pipe of the welding pipe (3) and the main pipe (2) are fixedly connected by high-temperature brazing welding at the temperature of 1000-1200 ℃, the red copper material coating outside the welding pipe (3) and the stainless steel pipe are fixed by a hot plating process, and the process temperature of hot plating is 1000-1200 ℃.
2. The heat exchanger joint of claim 1, wherein: the welded pipe (3) comprises a stainless steel pipe body and a red copper layer on the outer surface layer of the stainless steel pipe body.
3. The heat exchanger joint of claim 1, wherein: at least one opening end of the main pipe (2) is provided with a wire head (1), and the main pipe (2) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910195286.6A CN109855467B (en) | 2019-03-14 | 2019-03-14 | Heat exchanger joint, joint manufacturing method and brazing method with heat exchanger core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910195286.6A CN109855467B (en) | 2019-03-14 | 2019-03-14 | Heat exchanger joint, joint manufacturing method and brazing method with heat exchanger core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109855467A CN109855467A (en) | 2019-06-07 |
| CN109855467B true CN109855467B (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910195286.6A Active CN109855467B (en) | 2019-03-14 | 2019-03-14 | Heat exchanger joint, joint manufacturing method and brazing method with heat exchanger core |
Country Status (1)
| Country | Link |
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| CN (1) | CN109855467B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223826A (en) * | 1979-01-29 | 1980-09-23 | Usui Kokusai Sangyo Kabushiki Kaisha | Method of brazing stainless steels |
| JP2007144496A (en) * | 2005-11-30 | 2007-06-14 | Denso Corp | Joint structure and its manufacturing method |
| DE102007007606A1 (en) * | 2006-02-13 | 2007-09-20 | Behr Gmbh & Co. Kg | Process to solder component parts of an automotive heat exchanger e.g. radiator or air conditioning heat exchanger in inert gas atmosphere |
| CN201003777Y (en) * | 2006-08-11 | 2008-01-09 | 廖广源 | Non-corrosive steel copper-heating guiding-tube domestic heating stove |
| CN202118387U (en) * | 2011-05-05 | 2012-01-18 | 金龙精密铜管集团股份有限公司 | Steel copper tube for air conditioners |
| CN102848139A (en) * | 2012-06-08 | 2013-01-02 | 浙江三花制冷集团有限公司 | Connection pipe, production method thereof and gas collection tube assembly |
| CN203083220U (en) * | 2013-02-07 | 2013-07-24 | 新昌县丰亿电器有限公司 | Air-conditioner shunting tube stack |
| CN203703094U (en) * | 2014-01-27 | 2014-07-09 | 湖北银轮机械有限公司 | Water-cooling integrated stainless steel oil cooler |
| CN104646978A (en) * | 2015-01-06 | 2015-05-27 | 广东万和新电气股份有限公司 | Manufacturing method for tube fin-type stainless steel heat exchanger |
| KR20160020313A (en) * | 2014-08-13 | 2016-02-23 | 진호테크(주) | Heat exchanger |
| CN205938293U (en) * | 2016-08-19 | 2017-02-08 | 嵊州市致远焊接制品有限公司 | Novel four bundles of business turn over water pipes |
| CN209978701U (en) * | 2019-03-14 | 2020-01-21 | 扈杰 | Heat exchanger joint |
-
2019
- 2019-03-14 CN CN201910195286.6A patent/CN109855467B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223826A (en) * | 1979-01-29 | 1980-09-23 | Usui Kokusai Sangyo Kabushiki Kaisha | Method of brazing stainless steels |
| JP2007144496A (en) * | 2005-11-30 | 2007-06-14 | Denso Corp | Joint structure and its manufacturing method |
| DE102007007606A1 (en) * | 2006-02-13 | 2007-09-20 | Behr Gmbh & Co. Kg | Process to solder component parts of an automotive heat exchanger e.g. radiator or air conditioning heat exchanger in inert gas atmosphere |
| CN201003777Y (en) * | 2006-08-11 | 2008-01-09 | 廖广源 | Non-corrosive steel copper-heating guiding-tube domestic heating stove |
| CN202118387U (en) * | 2011-05-05 | 2012-01-18 | 金龙精密铜管集团股份有限公司 | Steel copper tube for air conditioners |
| CN102848139A (en) * | 2012-06-08 | 2013-01-02 | 浙江三花制冷集团有限公司 | Connection pipe, production method thereof and gas collection tube assembly |
| CN203083220U (en) * | 2013-02-07 | 2013-07-24 | 新昌县丰亿电器有限公司 | Air-conditioner shunting tube stack |
| CN203703094U (en) * | 2014-01-27 | 2014-07-09 | 湖北银轮机械有限公司 | Water-cooling integrated stainless steel oil cooler |
| KR20160020313A (en) * | 2014-08-13 | 2016-02-23 | 진호테크(주) | Heat exchanger |
| CN104646978A (en) * | 2015-01-06 | 2015-05-27 | 广东万和新电气股份有限公司 | Manufacturing method for tube fin-type stainless steel heat exchanger |
| CN205938293U (en) * | 2016-08-19 | 2017-02-08 | 嵊州市致远焊接制品有限公司 | Novel four bundles of business turn over water pipes |
| CN209978701U (en) * | 2019-03-14 | 2020-01-21 | 扈杰 | Heat exchanger joint |
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| Publication number | Publication date |
|---|---|
| CN109855467A (en) | 2019-06-07 |
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