Radiator and transformer
By designing a radiator with bent parts and a sleeved fin tube, the oil leakage risk caused by small heat transfer area and welding stress deformation in the prior art is solved, and more efficient heat dissipation and lower oil leakage risk are achieved.
Patent Information
- Application Number
- CN202421134436.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The existing transformer radiators have low heat transfer area, limited heat dissipation performance, and there is a risk of oil leakage due to welding stress deformation.
A radiator is designed, including a first oil pipe, a second oil pipe, a plurality of heat exchange tubes and fin tubes. By providing at least two bent parts arranged opposite directions and fin tubes arranged on the heat exchange tube, the number of welded joints is reduced, the contact area between the organic heat carrier and the heat exchange tube is increased, and the heat dissipation area is improved.
The number of solder joints is effectively reduced, the risk of oil leakage caused by stress deformation is avoided, and the heat dissipation capacity is improved by increasing the heat dissipation area.
Smart Images
Figure CN222600696U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of radiators, and in particular to a radiator and a transformer. Background Art
[0002] Power transformers are core equipment in the power grid, and their operating stability is directly related to the safe operation of the power grid. In addition, the increase in the internal temperature of the transformer will accelerate the aging process of the insulation material, thus affecting the safe operation of the transformer.
[0003] At present, the heat dissipation of transformers is usually done by plate-type radiators. The heat transfer oil passes through the fin flow channel and radiates heat to achieve the purpose of heat dissipation. The radiation heat dissipation is much different from the convection heat dissipation; its heat transfer area is low and the heat dissipation performance is limited.
[0004] The inventors have found that the production process of the plate-type heat sink is to punch grooves in the steel sheet, and then press-weld the punched male and female sheets, and the grooves between the male and female sheets form the flow channel of the heat transfer oil. Since the long-term working temperature of the heat transfer oil is in the range of 50-90 degrees, it has a certain impact on the generation of welding stress; and the stress deformation of the plate-type heat sink will cause the risk of oil leakage. Utility Model Content
[0005] The utility model aims to provide a radiator and a transformer, which can reduce the number of welding points of the entire radiator and avoid the risk of oil leakage caused by stress deformation.
[0006] The embodiment of the utility model is achieved as follows:
[0007] In the first aspect, the utility model proposes a radiator, comprising a first oil pipe, a second oil pipe, a plurality of heat exchange tubes and fin tubes; the first oil pipe is used to introduce an organic heat carrier; the first oil pipe is used to export the organic heat carrier; the plurality of heat exchange tubes are provided with at least two oppositely arranged bending portions, the first ends of the plurality of heat exchange tubes are connected to the first oil pipe, and the second ends of the plurality of heat exchange tubes are connected to the second oil pipe; fins are formed on the fin tubes, the fin tubes are sleeved on the plurality of heat exchange tubes, and the fin tubes are arranged between at least two oppositely arranged bending portions.
[0008] Optionally, the plurality of heat exchange tubes include a first bending portion, a first tube body, a second tube body, a third tube body and a second bending portion that are sequentially connected, and the first bending portion and the second bending portion are arranged opposite to each other; or
[0009] The plurality of heat exchange tubes include a connected first bending portion, a first tube body, a plurality of second tube bodies, a third tube body and a plurality of second bending portions, and the second bending portions are arranged opposite to each other.
[0010] Optionally, the at least one first bending portion, the at least one second bending portion, the first tube body, the at least one second tube body and the third tube body are an integrally formed tube structure.
[0011] Optionally, the fin tube is sleeved on the first tube body, the second tube body and the third tube body.
[0012] Optionally, the fins on the fin tube are rolled into a winding spiral fin structure.
[0013] Optionally, the fin tube is provided with a graphene nano-ceramic coating.
[0014] Optionally, the first oil pipe is provided with a plurality of first oil ports, and the first oil pipe is connected with the plurality of heat exchange pipes through the first oil ports;
[0015] The second oil pipe is provided with a plurality of second oil ports, and the first oil pipe is connected with the plurality of heat exchange pipes through the second oil ports.
[0016] Optionally, the first oil pipe is arranged on the upper side of the second oil pipe.
[0017] Optionally, the radiator further includes a shell, in which at least the plurality of heat exchange tubes are arranged.
[0018] In a second aspect, the utility model further proposes a transformer, comprising the heat sink described in any one of the above items.
[0019] The beneficial effects of the embodiments of the utility model are:
[0020] The radiator is provided with a heat exchange tube and a fin tube, the fin tube is sleeved on the heat exchange tube, and the fin tube is formed into fins for heat dissipation, thereby reducing the number of welding points between the fins and the heat exchange tube, avoiding stress deformation due to high oil temperature, and reducing the risk of oil leakage; at the same time, the heat exchange tube is provided with at least two oppositely arranged bending parts, thereby increasing the contact area between the organic heat carrier and the inside of the heat exchange tube, improving the heat dissipation area, and enhancing the heat dissipation capacity. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0022] Figure 1 This is a schematic diagram of the structure of the radiator according to an embodiment of the utility model;
[0023] Figure 2 This is a first structural schematic diagram of a heat exchange tube according to an embodiment of the utility model;
[0024] Figure 3 This is a second structural schematic diagram of the heat exchange tube of an embodiment of the utility model;
[0025] Figure 4 A cross-sectional view of a radiator according to an embodiment of the utility model;
[0026] Figure 5 It is a side view of the radiator according to an embodiment of the utility model.
[0027] Icon: 100- radiator; 110- first oil pipe; 120- second oil pipe; 130- heat exchange tube; 131- first bending portion; 132- second bending portion; 133- first tube body; 134- second tube body; 135- third tube body; 140- fin tube; 141- fin; 150- shell; 160- supporting steel bar. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0031] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0032] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] The utility model provides a heat sink 100 mainly used in a transformer.
[0035] The transformer is a power transformer; the power transformer is a core device in the power grid, and the heat sink 100 is used to maintain its operating stability and ensure the safe operation of the power grid.
[0036] Please refer to Figure 1 The present embodiment provides a radiator 100, comprising a first oil pipe 110, a second oil pipe 120, a plurality of heat exchange tubes 130 and a fin tube 140; the first oil pipe 110 is used to introduce an organic heat carrier; the first oil pipe 110 is used to lead out the organic heat carrier; the plurality of heat exchange tubes 130 are provided with at least two oppositely disposed bending portions, the first ends of the plurality of heat exchange tubes 130 are connected to the first oil pipe 110, and the second ends of the plurality of heat exchange tubes 130 are connected to the second oil pipe 120; the fin tube 140 is formed with a fin 141, the fin tube 140 is sleeved on the plurality of heat exchange tubes 130, and the fin tube 140 is disposed between at least two oppositely disposed bending portions.
[0037] Among them, organic heat carrier is a general term for organic substances used as heat transfer media; organic heat carrier includes all organic media used for indirect heat transfer purposes such as heat transfer fluid, heat transfer oil, organic heat transfer medium and heat medium.
[0038] It can be understood that by providing the heat exchange tube 130 and the fin tube 140, the fin tube 140 is sleeved on the heat exchange tube 130, and the fin tube 140 is formed into fins 141 for heat dissipation, the number of welding points between the fins 141 and the heat exchange tube 130 is reduced, stress deformation due to high oil temperature is avoided, and the risk of oil leakage is reduced; at the same time, the heat exchange tube 130 increases the contact area between the organic heat carrier and the inside of the heat exchange tube 130 by providing at least two oppositely arranged bending portions, thereby increasing the heat dissipation area and enhancing the heat dissipation capacity.
[0039] Please refer to Figure 1 and Figure 4 In this embodiment, the radiator 100 includes a first oil pipe 110 ; the first oil pipe 110 is used to introduce the organic heat carrier and is connected to the heat exchange pipe 130 .
[0040] Optionally, the first oil pipe 110 is provided with a plurality of first oil ports, and the first oil pipe 110 is connected to the plurality of heat exchange pipes 130 through the first oil ports.
[0041] The number of the first oil ports is consistent with the number of the heat exchange tubes 130 .
[0042] Please refer to Figure 1 and Figure 4 In this embodiment, the radiator 100 includes a second oil pipe 120 ; the second oil pipe 120 is used to guide the organic heat carrier and is connected to the first end of the heat exchange pipe 130 .
[0043] Optionally, a plurality of second oil ports are provided on the second oil pipe 120 , and the second oil pipe 120 is connected to the second ends of the plurality of heat exchange tubes 130 through the second oil ports.
[0044] The number of the second oil ports is consistent with the number of the heat exchange tubes 130 .
[0045] In this embodiment, the first oil pipe 110 is disposed on the upper side of the second oil pipe 120. It can be understood that the organic heat carrier descends from the first oil pipe 110 through the heat exchange tube 130, and the heat dissipation rate increases when it contacts the air through the fin tube 140. Since the contact area between the heat transfer oil and the inside of the fin tube 140 is enlarged and the heat dissipation area is increased, the heat dissipation capacity is enhanced.
[0046] In this embodiment, the radiator 100 includes a heat exchange tube 130 ; the heat exchange tube 130 is respectively connected to the first oil pipe 110 and the second oil pipe 120 and is used to pass an organic heat carrier for heat exchange.
[0047] Optionally, the plurality of heat exchange tubes 130 are in a serpentine structure and include a first bending portion 131 , a second bending portion 132 , a first tube body 133 , a second tube body 134 and a third tube body 135 .
[0048] Please refer to Figure 3 Specifically, the first bending portion 131, the second bending portion 132, the first tube body 133, the second tube body 134 and the third tube body 135 are all one. The first bending portion 131 and the second bending portion 132 are arranged opposite to each other; the first end of the first tube body 133 is connected to the first oil pipe 110, and the second end of the first tube body 133 is connected to the first end of the first bending portion 131; the first end of the second tube body 134 is connected to the second end of the first bending portion 131, and the second end of the second tube body 134 is connected to the first end of the second bending portion 132; the first end of the third tube body 135 is connected to the second end of the second bending portion 132, and the second end of the third tube body 135 is connected to the second oil pipe 120.
[0049] The first bending portion 131 and the second bending portion 132 are both bent pipes with a U-shaped structure.
[0050] The first end of the first tube body 133 is connected to the first oil port of the first oil pipe 110 by welding; meanwhile, in order to facilitate welding, the first tube body 133 is bent toward the position of the first oil port.
[0051] The second end of the third tube body 135 is connected to the second oil port of the second oil pipe 120 by welding; meanwhile, in order to facilitate welding, the second tube body 134 is bent toward the position of the second oil port.
[0052] It is understandable that the number of the first bending portion 131, the second bending portion 132 and the second tube body 134 can be multiple. The specific connection relationship between the first bending portion 131, the second bending portion 132 and the second tube body 134 can be selected according to the number of settings.
[0053] Please refer to Figure 2 and Figure 4Specifically, when there are multiple first bends 131, second bends 132, and second tube bodies 134, the connection method is as follows: the first bends 131 and the second bends 132 are arranged opposite to each other, and multiple second bends 132 are arranged opposite to each other. The second end of the first tube body 133 is connected to the first first bend 131, the first first bend 131 is connected to the first second tube body 134, and the first second tube body 134 is connected to one end of the first second bend 132; then, one end of the second bend 132 is connected to the second second tube body 134, and multiple second tube bodies 134 and multiple second bends 132 are connected in this way, until the second end of the last second bend 132 is connected to the first end of the third tube body 135, and the second end of the third tube body 135 is connected to the second oil pipe 120.
[0054] It is worth mentioning that at least one first bending portion 131 , at least one second bending portion 132 , the first tube body 133 , at least one second tube body 134 and the third tube body 135 are an integrally formed tube structure.
[0055] In this embodiment, the heat sink 100 includes a fin tube 140 .
[0056] It is understandable that the fin tube 140 is sleeved on the plurality of heat exchange tubes 130 , and the fin tube 140 is formed with fins 141 ; such a configuration can significantly reduce the welding points between the fin tube 140 and the heat exchange tube 130 , thereby improving the safety of the equipment.
[0057] Optionally, the fin tube 140 is sleeved on the first tube body 133 , at least one second tube body 134 and the third tube body 135 .
[0058] Please refer to Figure 3 Optionally, the fin tube 140 is rolled into a fin 141 with a winding spiral fin 141 structure. It can be understood that the fin 141 with a winding spiral fin 141 structure can increase the contact area between the organic heat carrier and the inside of the heat exchange tube 130, increase the heat dissipation area, and enhance the heat dissipation capacity; at the same time, the direct heat exchange area is increased by 30%-50% compared with the traditional fin radiator 100, and the effective heat exchange area is increased by more than double;
[0059] Optionally, a graphene nano-ceramic coating is provided on the fin tube 140. It is understandable that the graphene nano-ceramic coating is coated on the fin tube 140 through the graphene nano-deposition ceramic coating technology for anti-corrosion and anti-scaling treatment, which improves the heat dissipation performance and realizes the self-cleaning of the radiator 100, greatly improving the service life of the radiator 100. At the same time, dust accumulation on the surface of the radiator 100 has a great influence on the heat dissipation performance of the radiator 100. The realization of the self-cleaning functional layer can save energy and improve the service life of the radiator 100.
[0060] Please refer to Figure 1 and Figure 5 In this embodiment, the heat sink 100 includes a housing 150 .
[0061] Optionally, corresponding avoidance openings are opened along the bottom plate of the top plate of the shell 150, the first oil pipe 110 is horizontally installed on the top plate of the shell 150, and the second oil pipe 120 is horizontally installed on the bottom plate of the shell 150; multiple heat exchange tubes 130 are arranged inside the shell 150.
[0062] It is understandable that, as the high-temperature organic heat carrier flows through the cavity of the heat pipe, the temperature difference between the temperature and the air is generated, the pressure changes, and natural convection is formed. Compared with the radiation heat dissipation of the traditional plate heat sink 100, the natural convection heat dissipation of this embodiment greatly improves the heat dissipation performance.
[0063] Please refer to Figure 1 It is worth mentioning that the first oil pipe 110 and the second oil pipe 120 can be connected to the heat exchange pipe 130 by welding.
[0064] It is worth mentioning that support steel bars 160 are provided between the first oil pipe 110 and the second oil pipe 120 for support and fixation.
[0065] The heat exchange tube and fin tube 140 proposed in this embodiment are formed by a rolling mill and a tube bending machine, and the forming process is as follows: 1. Multiple aluminum tubes are inserted into the heat exchange tube 130 at intervals to form a composite tube; 2. The aluminum tubes of the composite tube are rolled into the fin tube 140 by a rolling mill; 3. The heat exchange tube 130 is bent by a tube bending machine to form a first bending portion 131 and a second bending portion 132, and the heat exchange tube 130 is formed into a serpentine structure as a whole. The two ends of the bent heat exchange tube 130 are welded to the first oil pipe 110 and the second oil pipe 120 respectively.
[0066] Among them, the radiator 100 has only 26 welding points, and they are traditional and reliable tube-to-tube welding. The risk is greatly reduced. At the same time, the radiator 100 is composed of tube bundles and has strong pressure bearing capacity. The weight of the radiator 100 can be greatly reduced, and the installation convenience is improved.
[0067] The working principle of the radiator 100 proposed in this embodiment is: the organic heat carrier flows downward from the first oil pipe 110 through the heat exchange tube 130, and the heat dissipation rate increases when it contacts with the air through the fin tube 140. The organic heat carrier flows in multiple heat exchange tubes 130, and the organic heat carrier conducts heat through the fins 141 on the fin tube 140. The organic heat carrier performs convection heat exchange with the ambient air through the fins 141 on the fin tubes 140 of the multiple heat exchange tubes 130, and the heat dissipation rate increases, thereby improving the heat dissipation capacity of the organic heat carrier, so as to achieve a significant reduction in the steady-state temperature of the transformer.
[0068] In summary, the radiator 100 proposed in this embodiment is provided with a heat exchange tube 130 and a fin tube 140, the fin tube 140 is sleeved on the heat exchange tube 130, and the fin tube 140 is formed into a fin 141 for heat dissipation, thereby reducing the number of welding points between the fin 141 and the heat exchange tube 130, avoiding stress deformation due to high oil temperature, and reducing the risk of oil leakage; at the same time, the heat exchange tube 130 is provided with at least two oppositely arranged bending portions, thereby increasing the contact area between the organic heat carrier and the inside of the heat exchange tube 130, thereby increasing the heat dissipation area and enhancing the heat dissipation capacity.
[0069] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A radiator, characterized in that: include: a first oil pipe, the first oil pipe being used to introduce an organic heat carrier; a second oil pipe, wherein the first oil pipe is used to guide the organic heat carrier out; A plurality of heat exchange tubes, each of which is provided with at least two oppositely disposed bending portions, a first end of each of which is connected to the first oil pipe, and a second end of each of which is connected to the second oil pipe; A fin tube, wherein fins are formed on the fin tube, the fin tube is sleeved on the plurality of heat exchange tubes, and the fin tube is arranged between at least two oppositely arranged bending portions.
2. The heat sink according to claim 1, characterized in that: The plurality of heat exchange tubes include a first bending portion, a first tube body, a second tube body, a third tube body and a second bending portion that are sequentially connected, and the first bending portion and the second bending portion are arranged opposite to each other; or The plurality of heat exchange tubes include a connected first bending portion, a first tube body, a plurality of second tube bodies, a third tube body and a plurality of second bending portions, and the second bending portions are arranged opposite to each other.
3. The heat sink according to claim 2, characterized in that: The first bending portion, the second bending portion, the first tube body, the second tube body and the third tube body are an integrally formed tube body structure.
4. The heat sink according to claim 2, characterized in that: The fin tube is sleeved on the first tube body, the second tube body and the third tube body.
5. The heat sink according to claim 1, characterized in that The fin tube is roll-formed into the fins of a winding spiral fin structure.
6. The heat sink according to claim 1, characterized in that The fin tube is provided with a graphene nano-ceramic coating.
7. The heat sink according to claim 1, characterized in that: The first oil pipe is provided with a plurality of first oil ports, and the first oil pipe is connected with the plurality of heat exchange pipes through the first oil ports; The second oil pipe is provided with a plurality of second oil ports, and the first oil pipe is connected with the plurality of heat exchange pipes through the second oil ports.
8. The heat sink according to claim 1, characterized in that The first oil pipe is arranged on the upper side of the second oil pipe.
9. The heat sink according to claim 1, characterized in that: The radiator further comprises a shell, in which at least the plurality of heat exchange tubes are arranged.
10. A transformer, characterized in that: A heat sink comprising any one of claims 1 to 9.