CN110671846A - Gas collector with inward and outward turned edges and manufacturing method and application thereof - Google Patents
Gas collector with inward and outward turned edges and manufacturing method and application thereof Download PDFInfo
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- CN110671846A CN110671846A CN201910942087.7A CN201910942087A CN110671846A CN 110671846 A CN110671846 A CN 110671846A CN 201910942087 A CN201910942087 A CN 201910942087A CN 110671846 A CN110671846 A CN 110671846A
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- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Chemical & Material Sciences (AREA)
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- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides an inside and outside flanging gas collector and a manufacturing method and application thereof, wherein the inside and outside flanging gas collector comprises a pipe body, a cavity is arranged inside the pipe body, a first through hole is arranged on the side wall of the pipe body, an inside flanging facing the inside of the pipe body and an outside flanging facing the outside of the pipe body are arranged on the edge of the first through hole, and the inside flanging and the outside flanging of the first through hole are integrally formed. The inner flanging can increase the welding surface of the gas collector during welding from 1mm to 4mm, zero leakage during welding is realized, the welding penetration of the welding flux can be guaranteed to be 100% inside the gas collector, the outer flanging can guarantee the consistency of the internal flow of the gas collector, and the height requirement of a user on the outer flanging of a product is met. The air collector with the inner flange and the outer flange meets the quality standard of special air conditioners and refrigeration equipment such as a high-speed rail air conditioner, a subway air conditioner, a military refrigeration system, an aircraft carrier refrigeration system or an underwater operation refrigeration system, and meets the requirement of noise reduction.
Description
Technical Field
The invention relates to the field of refrigeration equipment, in particular to a gas collector for internal and external flanging of a special air conditioner and a manufacturing method and application thereof.
Background
The conventional commercial air conditioner generally consists of an external unit and a host, works by switching on a power supply, has relatively simple requirements on the assembly size of the gas collector, and the flanging hole of the gas collector adopts an inward flanging or outward flanging mode. In reality, a special air conditioner used in a special environment is also provided, and the special air conditioner is an air conditioner product specially designed and manufactured for meeting air conditioning requirements of certain special environments and process places. The special air conditioner does not necessarily work by using electric energy, and can work by burning coal or even burning gas (namely methane), so the welding quality requirement of the gas collector of the air conditioner needs to reach 100 percent of qualified rate, and zero defect and zero error are required. For example, special air conditioners mainly applied to high-speed rails, subways and even military refrigeration systems adopt methane as power, the special air conditioners require zero leakage for welding parts of a gas collector, the melting depth of welding materials must meet the requirements by 100%, and higher requirements are provided for the noise and the welding quality of the air conditioners.
The flanging hole of the gas collector can ensure the consistency of the fluid flow by adopting a flanging mode, but the welding difficulty is high, and the quality and the leakage rate are difficult to ensure by manual welding at present. Based on this, many air conditioner accessory producers change the mode of inside flanging, and rethread polishing burring process improves welding quality, but even so, the leakage rate after the welding of gas collector can only be controlled to 50PPM at present, still can not accomplish zero defect. And some special air conditioners used in special environments, such as air conditioners used in underwater operation environments, also need to require the consistency of the flow inside the air conditioner after the air conditioner is started, ensure the consistency of noise after the refrigeration equipment is started, and have very high requirements on noise. However, the gas collector products on the market at present cannot simultaneously ensure the flow consistency and the zero leakage rate, and are difficult to meet the quality standard of special air conditioner accessories used in special environments.
Disclosure of Invention
The invention aims to provide an inside and outside flanging gas collector and a manufacturing method and application thereof, and solves the problems that the existing gas collector cannot realize zero welding leakage and guarantee flow consistency and cannot meet the quality standard of special air conditioners and refrigeration equipment.
In order to solve the problems, the invention provides an inside and outside flanging gas collector, which comprises a pipe body, wherein a cavity is formed inside the pipe body, the side wall of the pipe body is provided with a first through hole, the edge of the first through hole is provided with an inside flanging facing the inside of the pipe body and an outside flanging facing the outside of the pipe body, and the inside flanging and the outside flanging of the first through hole are integrally formed.
According to an embodiment of the invention, the inward flange of the first through hole edge protrudes inward from the side wall of the tube body by 3-4mm, and the outward flange of the first through hole edge protrudes outward from the side wall of the tube body by 1.5-2 mm.
According to an embodiment of the present invention, the number of the first through holes is plural, and all the first through holes are distributed in the tube at intervals.
According to an embodiment of the present invention, the diameter of the first through hole is 4-30mm, the diameter of the tube body is 7-100mm, and the wall thickness of the tube body is 0.5-5 mm.
According to an embodiment of the present invention, the sidewall of the tube body has a second through hole, and the edge of the second through hole has a flange facing the outside of the tube body.
According to an embodiment of the present invention, the tube is made of one of copper, stainless steel or aluminum.
According to another aspect of the invention, the invention further provides the use of a flanged gas collector according to any one of the above in a high-speed rail air conditioner, a subway air conditioner, a special air conditioner, a military refrigeration system, an aircraft carrier refrigeration system or an underwater operation refrigeration system.
According to another aspect of the present invention, the present invention further provides a method for manufacturing a flanged gas collector, comprising the steps of:
a punching step, punching a hole on the side wall of the pipe body to form a first through hole with a preset size, wherein the inside of the pipe body is provided with a cavity;
the inside and outside turn-ups step, heat the towards needle of drilling machine to predetermined temperature, the towards needle of control drilling machine bores into first through-hole earlier, it shifts out in first through-hole to bore into predetermined degree of depth back again control towards needle, make under high temperature and towards needle pivoted effect, the diameter increase of first through-hole, simultaneously the border of first through-hole takes place shrink deformation and receives along towards the extrusion of needle to body inside and outside two directions, thereby at the inside turn-ups of body of border an organic whole formation orientation body of first through-hole and the outside turn-ups of orientation body.
According to an embodiment of the invention, in the step of flanging the inner and outer edges, the punch pin of the drilling machine firstly drills into the first through hole, and when the height of the flanging of the first through hole reaches 60% of the wall thickness of the pipe body, the punch pin is controlled to move out reversely.
According to an embodiment of the present invention, in the punching step, a hole is punched in the sidewall of the tube to form a second through hole; the manufacturing method of the inward and outward flanged gas collector comprises a second through hole flanging step, wherein the outward flange facing the outside of the pipe body is formed by processing the edge of the second through hole by using a hole drawing device.
Compared with the prior art, the technical scheme has the following advantages:
according to the invention, the inner flanging facing the inside of the pipe body and the outer flanging facing the outside of the pipe body are integrally formed at the edge of the first through hole of the pipe body, namely, the pipe body of the gas collector has an inner flanging and outer flanging structure, wherein the inner flanging can increase the welding surface of the gas collector during welding from the original 1mm to 4mm, zero welding leakage is realized, the welding flux penetration inside the gas collector can be ensured to be 100%, and the outer flanging can ensure the consistency of the internal flow of the gas collector, so that the height requirement of a user on the outer flanging of a product is met. The gas collector with the inner and outer flanging provided by the invention meets the quality standard of special air conditioners and refrigeration equipment such as a high-speed rail air conditioner, a subway air conditioner, a military refrigeration system, an aircraft carrier refrigeration system or an underwater operation refrigeration system through verification and various data tests, and meets the requirement of noise reduction.
Drawings
Fig. 1 is a schematic perspective view of a gas collector with inward and outward flanged edges according to the present invention;
figure 2 is an enlarged fragmentary view of the internally and externally flanged gas collector provided by the present invention with a portion of the end of the tube body being phantom cut away to show the internal flange inside the cavity;
FIG. 3 is a top view of a turned inside and outside collector provided by the present invention;
FIG. 4 is a side view of a turned inside and outside collector provided by the present invention;
fig. 5 is a flow chart of the manufacturing method of the inward and outward flanged gas collector provided by the invention.
Detailed Description
The following description is only for the purpose of disclosing the invention so as to enable a person skilled in the art to practice the invention. The embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other arrangements without departing from the spirit and scope of the invention.
As shown in fig. 1 to 4, the present invention provides a gas collector with inward and outward flanges, and particularly relates to a gas collector suitable for special air conditioners or refrigeration equipment used in special environments or process places. The air collector with the inner flange and the outer flange is provided with the inner flange and the outer flange, so that the consistency of the internal flow of the air collector can be ensured, zero leakage in welding of the air collector can be ensured, and the noise reduction requirement of a special air conditioner or refrigeration equipment can be met. Specifically, the flanged gas collector includes a tube body 10.
The inside of the tube 10 has a cavity 101, the side wall of the tube 10 has a first through hole 102, and the edge of the first through hole 102 has an inward flange 11 facing the inside of the tube 10 and an outward flange 12 facing the outside of the tube 10. The inner flange 11 and the outer flange 12 of the first through hole 102 are integrally formed, that is, the inner flange 11 and the outer flange 12 at the edge of the first through hole 102 are connected to form a whole body perpendicular to the side wall of the tube body 10.
The material of the tube 10 is one of copper, stainless steel or aluminum. The material of the pipe body 10 is preferably copper. Practice proves that the service life of the inward and outward flanged gas collector made of copper is longer than that of the gas collector made of stainless steel and aluminum materials, and the service life of the inward and outward flanged gas collector made of copper can meet the design requirements of special air conditioners or refrigeration equipment.
The number of the first through holes 102 is one or more according to the structure and requirements of the gas collector. When the number of the first through holes 102 is plural, all the first through holes 102 are distributed at intervals on the sidewall of the tube 10. For example, in the present embodiment, all the first through holes 102 are distributed in the tube 10 in a plurality of rows at intervals. The arrangement of the first through holes 102 may be different according to the structural requirements of the gas collector.
Optionally, in this embodiment, the height of the inward flange 11 at the edge of the first through hole 102 protruding inward from the sidewall of the tube 10 is 3-4mm, and the height of the outward flange 12 at the edge of the first through hole 102 protruding outward from the sidewall of the tube 10 is 1.5-2 mm; the diameter of the first through hole 102 is 4-30mm, for example the diameter of the first through hole 102 is 5.5 mm. In other embodiments, the heights of the inner flange 11 and the outer flange 12 may be reasonably designed to be other values, and the diameter of the first through hole 102 may also be reasonably designed to be other values according to the requirements of the gas collector and the wall thickness of the tube body 10.
In the actual production and manufacturing process, through improvement and breakthrough on a cutter and special processing equipment and combination with the traditional gas collector processing technology, the first through hole 102 is firstly punched on the side wall of the pipe body 10, and then the first through hole 102 is flanged inwards and outwards by adopting a punch arranged on a bench drill. When flanging the hole, firstly heating the punching pin of the bench drill to a predetermined temperature, then drilling the punching pin into the first through hole 102 to a predetermined depth, and then moving out reversely, so that under the action of high temperature and rotation of the punching pin, the diameter of the first through hole 102 is increased, and simultaneously, the edge of the first through hole 102 is contracted and deformed and is extruded to the inside and outside of the pipe body 10 along the punching pin, thereby integrally forming an inward flanging 11 facing the inside of the cavity 101 of the pipe body 10 and an outward flanging 12 facing the outside of the pipe body 10 at the edge of the first through hole 102. The inward and outward flanging of the first through hole 102 can be completed at one time through the punching pin of the console drill.
Further, the side wall of the tube 10 is provided with a second through hole 103, and the edge of the second through hole 103 is provided with a flange 13 facing the outside of the tube 10. Optionally, in this embodiment, the diameter of the second through hole 103 is larger than the diameter of the first through hole 102, and the height of the outward flange 13 at the edge of the second through hole 103 protruding outward from the sidewall of the tube 10 is 3 mm. When the second through hole 103 is flanged, the flanging is mainly realized by adopting a semi-automatic hole drawing device, for example, an oil pressure device system is adopted to do linear reciprocating motion, a hydraulic actuating element is driven by a hydraulic cylinder, hydraulic energy is converted into mechanical energy, the device has a simple structure, a speed reducer can be omitted when reciprocating motion is executed, the operation is convenient, and the work is reliable.
The inner flanging and the outer flanging of the gas collector provided by the invention have the inner flanging 11 and the outer flanging 12 at the edge of the first through hole 102 of the pipe body 10, wherein the inner flanging 11 can increase the welding surface of the inner flanging and the outer flanging gas collector during welding from the traditional 1mm to 4mm, so that the welding difficulty is reduced, and the welding flux penetration can be ensured to be 100% inside the inner flanging, so that zero leakage during welding is realized. The flanging 12 can ensure the consistency of the internal flow of the gas collector of the flanging, and the height requirement of a user on the flanging 12 of the product is met. The gas collector with the inward and outward flanges provided by the invention meets the quality standard of special air conditioners and refrigeration equipment through verification and various data tests, and meets the noise reduction requirement. Therefore, the air collector with the inward and outward flanges is applied to a high-speed rail air conditioner, a subway air conditioner, a special air conditioner, a military refrigeration system, an aircraft carrier refrigeration system or an underwater operation refrigeration system, and can meet the use standard of a special environment. In addition, the flanged gas collector also has advantages in price compared with the market goods for outsourcing.
According to another aspect of the present invention, the present invention further provides a method for manufacturing the flanged gas collector, comprising the following steps:
a punching step of punching a hole on a side wall of a pipe body 10 to form a first through hole 102 of a predetermined size, wherein the pipe body 10 has a cavity 101 therein;
and an inside and outside flanging step, namely heating a punching pin of the drilling machine to a preset temperature, controlling the punching pin of the drilling machine to firstly drill into the first through hole 102, and controlling the punching pin to reversely move out of the first through hole 102 after drilling into a preset depth, so that under the action of high temperature and punching pin rotation, the diameter of the first through hole 102 is increased, and meanwhile, the edge of the first through hole 102 is subjected to shrinkage deformation and is extruded towards the inside and the outside of the pipe body 10 along the punching pin, and therefore an inside flanging 11 facing the inside of the pipe body 10 and an outside flanging 12 facing the outside of the pipe body 10 are integrally formed at the edge of the first through hole 102.
In application, the gas collector with the inner flange and the outer flange is manufactured by utilizing a machine tool. The blanking is carried out to body 10 earlier before the step of punching, then degreases body 10 to some smudges and the oil stain on getting rid of body 10 surface, the follow-up processing of being convenient for. After degreasing, the pipe body 10 is punched by a punch press to form the first through hole 102.
In the punching step, in addition to the first through hole 102, a second through hole 103 is punched in the sidewall of the pipe body 10.
In the inner and outer flanging steps, the inner and outer flanging operations are performed on a drilling machine, for example, a bench drill can be used for processing, and a punching pin is pre-installed on the drilling machine. The punching pin of the drilling machine firstly drills into the first through hole 102, and the diameter of the first through hole 102 is gradually increased along with the drilling of the punching pin. When the height of the flanging 12 of the first through hole 102 reaches 60% of the wall thickness of the pipe body, the punch pin is controlled to move out of the first through hole 102 reversely. The invention adopts the shaped extension drill bit of the bench drill processing device, namely the punching pin processes the inner and outer flanging of the gas collector with the inner and outer flanging, so that the inner welding surface of the gas collector can be increased by 3mm compared with the traditional technology during welding, and the height of the outer flanging 12 can meet the requirement of pipe drawing.
For example, when the first through hole 102 with a thickness of 5.5mm is machined, the tube body 10 is vertically installed in a positioning through cavity of the bench drill machining device, the punch pin is located above the tube body 10, and the punch pin performs flaring on the first through hole 102 of the tube body 10 under the driving of the manual driving mechanism. Specifically, the punch pin first drills downward into the first through hole 102, and as the punch pin advances, the diameter of the first through hole 102 is gradually enlarged until the diameter of the first through hole 102 is increased to about 60% of the final required diameter (for machining the first through hole 102 with a diameter of 5.5mm, that is, when the diameter of the first through hole 102 reaches 3-4 mm), the punch pin of the console drill moves upward and reversely out of the first through hole 102. Therefore, the inner flanging 11 with the height of 3-4mm and the outer flanging with the height of 1.5-2mm can be formed in the first through hole 102, so that the gas collector meets the requirements of welding zero leakage and the requirements of users on the height of the outer flanging.
Further, the manufacturing method of the inward and outward flanged gas collector comprises the following steps of flanging the second through hole: and a flanging 13 facing the outside of the pipe body 10 is formed at the edge of the second through hole 103 by using a hole drawing device. That is, the edge of the second through hole 103 is flanged. At the moment, the semi-automatic hole drawing device is mainly adopted for realizing, for example, an oil pressure device system is adopted for carrying out linear reciprocating motion, a hydraulic actuating element is driven by a hydraulic cylinder, hydraulic energy is converted into mechanical energy, the device is simple in structure, a speed reducing device can be omitted when reciprocating motion is carried out, the operation is convenient, and the work is reliable. After all the first through holes 102 and the second through holes 103 are turned over, sealing is finally carried out.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and the embodiments of the present invention may be subject to any changes or modifications without departing from the principles.
Claims (10)
1. A kind of inside and outside turned-over gas collector, characterized by that, comprising:
the pipe body is internally provided with a cavity, the side wall of the pipe body is provided with a first through hole, the edge of the first through hole is provided with an inner flanging facing the inside of the pipe body and an outer flanging facing the outside of the pipe body, and the inner flanging and the outer flanging of the first through hole are integrally formed.
2. The inturned gas collector of claim 1, wherein the height of the inturned flange of the first through-hole edge projecting inwardly from the sidewall of the tube body is 3-4mm, and the height of the inturned flange of the first through-hole edge projecting outwardly from the sidewall of the tube body is 1.5-2 mm.
3. The flanged gas collector of claim 1 or 2, wherein the number of the first through holes is multiple, and all the first through holes are distributed at intervals on the tube body.
4. The flanged gas collector as claimed in any one of claims 1 or 2, wherein the diameter of the first through-hole is 4-30mm, the diameter of the tube body is 7-100mm, and the wall thickness of the tube body is 0.5-5 mm.
5. The flanged gas collector of any one of claims 1 or 2, wherein the side wall of the tube has a second through hole, the rim of the second through hole having a flange facing outwardly of the tube.
6. The flanged gas collector of any one of claims 1 or 2, wherein the tube body is made of one of copper, stainless steel or aluminum.
7. The use of the flanged gas collector of any of claims 1-6, wherein the flanged gas collector is used in a high-speed rail air conditioner, a subway air conditioner, a special air conditioner, a military refrigeration system, an aircraft carrier refrigeration system, or an underwater operation refrigeration system.
8. The manufacturing method of the inward and outward flanged gas collector is characterized by comprising the following steps:
a punching step of punching a hole on the side wall of a pipe body to form a first through hole with a preset size, wherein the inside of the pipe body is provided with a cavity;
and an inner and outer flanging step, namely heating a punching needle of the drilling machine to a preset temperature, controlling the punching needle of the drilling machine to firstly drill into the first through hole, and controlling the punching needle to reversely move out of the first through hole after drilling into a preset depth, so that under the action of high temperature and punching needle rotation, the diameter of the first through hole is increased, and meanwhile, the edge of the first through hole is subjected to shrinkage deformation and is extruded to the inside and the outside of the pipe body along the punching needle, and an inner flanging facing the inside of the pipe body and an outer flanging facing the outside of the pipe body are integrally formed at the edge of the first through hole.
9. The method for manufacturing an inside and outside flanging gas collector as claimed in claim 8, wherein in the inside and outside flanging step, a punching pin of a drilling machine is firstly drilled into the first through hole, and when the outside flanging height of the first through hole reaches 60% of the wall thickness of the pipe body, the punching pin is controlled to be reversely removed.
10. The method of manufacturing a flanged gas collector as claimed in claim 8 or 9, wherein in the step of punching, a second through hole is punched in the side wall of the tube body; the manufacturing method of the inward and outward flanged gas collector comprises the following steps of flanging the second through hole: and processing the edge of the second through hole by using a hole drawing device to form an outward flange facing the outside of the pipe body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942087.7A CN110671846A (en) | 2019-09-30 | 2019-09-30 | Gas collector with inward and outward turned edges and manufacturing method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942087.7A CN110671846A (en) | 2019-09-30 | 2019-09-30 | Gas collector with inward and outward turned edges and manufacturing method and application thereof |
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| CN110671846A true CN110671846A (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910942087.7A Pending CN110671846A (en) | 2019-09-30 | 2019-09-30 | Gas collector with inward and outward turned edges and manufacturing method and application thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675971A (en) * | 1985-12-03 | 1987-06-30 | Michigan Special Products, Inc. | Desiccant assembly for refrigeration circuit and method |
| CN201034420Y (en) * | 2007-04-28 | 2008-03-12 | 天津市九鼎不锈钢制品有限公司 | Double jointed pipe column shaped radiator |
| CN105387660A (en) * | 2015-11-10 | 2016-03-09 | 芜湖三花制冷配件有限公司 | Double-pipe liquid reservoir and manufacturing method thereof |
| CN105598249A (en) * | 2016-03-10 | 2016-05-25 | 哈尔滨奔马科技有限公司 | Method for acquiring hollow tube with high external flange and tube |
| KR20180096867A (en) * | 2017-02-21 | 2018-08-30 | 주식회사 두원공조 | Joint bracket and the process of manufacture |
| CN208587633U (en) * | 2018-06-11 | 2019-03-08 | 新昌县华亿机械有限公司 | A kind of fluted shape collecting pipe of branch pipe welded directly to the run pipe |
-
2019
- 2019-09-30 CN CN201910942087.7A patent/CN110671846A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4675971A (en) * | 1985-12-03 | 1987-06-30 | Michigan Special Products, Inc. | Desiccant assembly for refrigeration circuit and method |
| CN201034420Y (en) * | 2007-04-28 | 2008-03-12 | 天津市九鼎不锈钢制品有限公司 | Double jointed pipe column shaped radiator |
| CN105387660A (en) * | 2015-11-10 | 2016-03-09 | 芜湖三花制冷配件有限公司 | Double-pipe liquid reservoir and manufacturing method thereof |
| CN105598249A (en) * | 2016-03-10 | 2016-05-25 | 哈尔滨奔马科技有限公司 | Method for acquiring hollow tube with high external flange and tube |
| KR20180096867A (en) * | 2017-02-21 | 2018-08-30 | 주식회사 두원공조 | Joint bracket and the process of manufacture |
| CN208587633U (en) * | 2018-06-11 | 2019-03-08 | 新昌县华亿机械有限公司 | A kind of fluted shape collecting pipe of branch pipe welded directly to the run pipe |
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Application publication date: 20200110 |
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