Low-pressure zinc-aluminum-magnesium spraying equipment for refrigeration pipe of refrigerator
By adopting a composite nozzle design in the low-pressure zinc-aluminum-magnesium spraying equipment of the refrigerator refrigeration pipe and using protective gas locally, the problems of large inert gas consumption and difficult sealing are solved, and a more efficient spraying process and lower gas consumption are achieved.
Patent Information
- Application Number
- CN202421758839.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-24
AI Technical Summary
The existing refrigerator refrigeration pipe low-pressure zinc-aluminum-magnesium spray equipment has difficulty maintaining the sealing properties in an inert gas environment, resulting in the escape and waste of inert gas, and the equipment consumption is relatively large.
The composite nozzle design is adopted, including carrier gas feed channel and protective gas channel. The nozzle is distributed centered on the refrigeration pipe passage, forming a 360° spray covering angle, and only locally used protective gas in the cold spray area to reduce the consumption of inert gas.
It effectively reduces the consumption of inert gas, ensures spraying efficiency, and avoids the reduction in the operation speed of the refrigeration pipe caused by sealing requirements.
Smart Images
Figure CN222821654U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a low-pressure zinc-aluminum-magnesium spraying device for refrigerator refrigeration pipes. Background Art
[0002] Refrigerator refrigeration tubes, that is, high-frequency welded tubes, will be plated during anti-corrosion treatment. In traditional solutions, hot-dip galvanizing equipment is usually used to treat the coating. This hot-dip treatment process requires passivation treatment and a large amount of purified water, has high environmental protection requirements, and has extremely high equipment costs. In addition, hot-dip technology consumes a lot of materials. With the continuous consumption of natural resources, new coating technologies are being popularized.
[0003] At present, cold spraying technology is a new technology that can effectively replace the traditional hot-dip treatment process. It itself has the characteristics of energy saving and environmental protection.
[0004] In cold spray technology, high-pressure cold spray has superior performance and is widely used in aerospace, aviation, medical and energy fields, but its cost is relatively high. The performance of low-pressure cold spray technology is slightly weaker, but its performance in refrigeration pipes is sufficient and can be used as an alternative technology for refrigeration pipe surface strengthening.
[0005] For example, in the prior patent with application number CN202223111085.X and title: A refrigerator tube galvanizing cold spraying equipment, on the one hand, an inert gas is needed to create an environment, and on the other hand, an inert gas is needed as a carrier to deliver the coating to the tube surface, and the process is carried out in real time in a dynamically operating tube making unit. During application, it was found that it was difficult to maintain the sealing of the inert gas environment, which easily caused the inert gas to escape and be wasted.
[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Utility Model Content
[0007] The utility model aims to address the deficiencies of the prior art and thus provide a low-pressure zinc-aluminum-magnesium spraying device for refrigerator refrigeration pipes which has less inert gas consumption and guaranteed spraying efficiency.
[0008] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a low-pressure zinc-aluminum-magnesium spraying device for refrigerator refrigeration pipes, comprising a box body and a composite spray head;
[0009] The box body is a closed box body, and a refrigeration pipe inlet and a refrigeration pipe outlet are respectively arranged at the horizontal ends of the length direction of the box body;
[0010] At least two of the composite nozzles are installed in the box;
[0011] The composite nozzle comprises a carrier gas feeding channel arranged in the center area of the nozzle and a circle of protective gas channels arranged around the carrier gas feeding channel;
[0012] The composite nozzles are distributed around the passage of the refrigeration pipe, and the effective spraying angles of the carrier gas feeding channels of the composite nozzles overlap with each other to form a 360° spraying coverage angle.
[0013] Based on the above, the composite nozzles installed in the box are arranged at equal angles.
[0014] Based on the above, the space directly below the passage of the refrigeration pipe is vacant and no composite nozzle is set.
[0015] Based on the above, the number of the composite nozzles is 2-4.
[0016] Based on the above, the composite nozzle is oriented perpendicular to the passage path of the refrigeration pipe.
[0017] Based on the above, the composite nozzle is oriented in an inclined direction toward the travel direction of the refrigeration pipe passage.
[0018] Based on the above, the carrier gas feeding channel of the composite nozzle includes a plurality of channels distributed in an annular shape.
[0019] Based on the above, the composite nozzle is trumpet-shaped as a whole, and the emission angle of the protective gas channel is radially arranged from the center to the surroundings.
[0020] Based on the above, a detachable waste trough is provided at the bottom of the box body.
[0021] Based on the above, a pressure relief valve and a pressure sensor are installed on the box body, and the pressure in the box body is maintained within 1MPa.
[0022] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model has the following advantages:
[0023] In the prior existing scheme, the box space is large, the consumption of continuously introducing inert gas is large, and because the refrigeration pipe needs to pass freely, it is impossible to achieve a good seal, resulting in a large consumption of protective gas. Based on this problem, this scheme no longer pursues the overall environment to be filled with inert gas, but performs protective gas protection in the local cold spraying. This scheme relies on the unique design of the composite nozzle so that the cold sprayed area is wrapped by protective gas, which ensures the effectiveness of cold spraying. At the same time, since there is only a local demand for protective gas, the consumption of protective gas is greatly reduced, and the spraying efficiency is also guaranteed, and the running speed of the refrigeration pipe will not be reduced due to the sealing requirement. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1The utility model is a schematic structural diagram of a low-pressure zinc-aluminum-magnesium spraying device for refrigerator refrigeration pipes.
[0025] Figure 2 It is a schematic diagram of channel distribution of the composite nozzle in the utility model.
[0026] Figure 3 It is a schematic diagram of channel distribution of a composite nozzle in other embodiments of the utility model.
[0027] In the figure: 1. Box body; 2. Composite nozzle; 3. Refrigeration pipe passage path; 11. Refrigeration pipe inlet; 12. Refrigeration pipe outlet; 21. Carrier gas feeding channel; 22. Protective gas channel. DETAILED DESCRIPTION
[0028] The technical solution of the utility model is further described in detail below through specific implementation methods.
[0029] like Figure 1 and Figure 2 As shown, a low-pressure zinc-aluminum-magnesium spraying device for refrigerator refrigeration pipes includes a box body 1 and a composite spray head 2.
[0030] The box body 1 is a closed box body, and a refrigeration pipe inlet 11 and a refrigeration pipe outlet 12 are respectively arranged at two horizontal ends of the length direction of the box body 1;
[0031] At least two composite nozzles 2 are installed in the box 1;
[0032] The composite nozzle 2 comprises a carrier gas feeding channel 21 arranged in the center area of the nozzle and a circle of protective gas channels 22 arranged around the carrier gas feeding channel 21 .
[0033] The composite nozzles 2 are distributed around the cooling pipe passage 3, and the effective spraying angles of the carrier gas feeding channels 21 of the composite nozzles 2 overlap with each other to form a 360° spraying coverage angle.
[0034] In this embodiment, there are two compound nozzles 2, which are horizontally arranged opposite to each other with an installation angle of 180°. In terms of the setting of the spray angle, the two compound nozzles 2 are also opposite to each other and perpendicular to the passage path 3 of the refrigeration pipe.
[0035] Working principle description:
[0036] The basic working principle of cold spraying is to use compressed gas to cool down and speed up through the nozzle, and then hit the tube wall at high speed, so that the powder particles are plastically deformed and deposited on the tube wall to form an accumulation layer. The zinc-aluminum-magnesium mixed powder silo is set on the side of the carrier gas pipeline, and the powder is carried into the composite nozzle 2 by the air pressure of the high-speed flow of the carrier gas.
[0037] Specifically, the external carrier gas pipeline is connected to the carrier gas feeding channel 21 of the composite nozzle 2, and the protective gas channel 22 of the composite nozzle 2 is connected to the external protective gas source. The protective gas flow rate can be lower than the carrier gas rate. The box body 1 is installed in one of the rings of the pipe making unit, and the refrigerator refrigeration pipe enters from the refrigeration pipe inlet 11 of the box body 1 and is discharged from the refrigeration pipe outlet 12.
[0038] When cold spraying begins, the carrier gas carries the zinc-aluminum-magnesium mixed powder to impact the surface of the tube wall at high speed to form a deposition layer, while the protective gas is blown from all sides to the action point to isolate the oxygen in the environment and prevent oxidation caused by the heat energy generated by the high-speed impact.
[0039] Since the protective gas is only used locally, the usage is greatly reduced compared to filling the entire box with protective gas.
[0040] In other embodiments, the number of the composite nozzles installed in the box can be multiple and arranged at equal angles. Generally speaking, the number of nozzles is set at 2-4.
[0041] Since some powder will be lost during cold spraying, there is a space directly below the passage of the refrigeration pipe, and no composite nozzle is set. A detachable waste trough is set at the bottom of the box for regular cleaning and recycling of lost powder.
[0042] In other embodiments, the composite nozzle is tilted toward the direction of travel of the refrigeration pipe passage. When tilted at a certain angle, it is possible to avoid mutual interference between the relatively arranged nozzles when the distance between them is close.
[0043] like Figure 3 As shown, in other embodiments, in order to improve the uniformity of the ejected gas flow, the carrier gas feeding channel of the composite nozzle includes a plurality of channels distributed in an annular shape so as to evenly cover the outer wall of the pipeline.
[0044] In other embodiments, the composite nozzle is trumpet-shaped as a whole, and the emission angle of the protective gas channel is radially arranged from the center to the surrounding areas. It is mainly used in scenes where the distance is short and the protective gas needs to be fully diffused.
[0045] In other embodiments, a pressure relief valve and a pressure sensor are installed on the box body, and the pressure in the box body is maintained within 1 MPa, thereby ensuring the stability of the moderate pressure environment and further ensuring the stability of the cold spraying.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.
Claims
1. A low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes, characterized by: It includes a box body and a composite sprinkler head; The box body is a closed box body, and a refrigeration pipe inlet and a refrigeration pipe outlet are respectively arranged at the horizontal ends of the length direction of the box body; At least two of the composite nozzles are installed in the box; The composite nozzle comprises a carrier gas feeding channel arranged in the center area of the nozzle and a circle of protective gas channels arranged around the carrier gas feeding channel; The composite nozzles are distributed around the passage of the refrigeration pipe, and the effective spraying angles of the carrier gas feeding channels of the composite nozzles overlap with each other to form a 360° spraying coverage angle.
2. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 1 is characterized in that: The composite nozzles installed in the box are arranged at equal angles.
3. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 2 is characterized in that: The space directly below the passage of the refrigeration pipe is vacant and no composite nozzle is arranged.
4. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 3 is characterized in that: The number of the composite nozzles is 2-4.
5. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 4 is characterized in that: The composite nozzle is oriented perpendicular to the passage of the refrigeration pipe.
6. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 4 is characterized in that: The composite nozzle is oriented in an inclined direction toward the travel direction of the refrigeration pipe passage.
7. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 5 or 6, characterized in that: The carrier gas feeding channel of the composite nozzle includes a plurality of channels distributed in an annular shape.
8. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 7 is characterized in that: The composite nozzle is trumpet-shaped as a whole, and the emission angle of the protective gas channel is arranged radially from the center to the surrounding areas.
9. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 8 is characterized in that: A detachable waste trough is arranged at the bottom of the box body.
10. The low-pressure zinc-aluminum-magnesium spraying equipment for refrigerator refrigeration pipes according to claim 9 is characterized in that: A pressure relief valve and a pressure sensor are installed on the box body, and the pressure inside the box body is maintained within 1 MPa.