Tensioning device

Abstract

The utility model discloses a tensioning device and relates to the technical field of transformers, the tensioning device is applied to a transformer, the transformer comprises a transformer body, an oil tank connected with the transformer body and a radiator installed on the outer side of the oil tank, the tensioning device comprises a main body part and a supporting part, and the upper end of the main body part is used for being connected with the oil tank; at least part of the main body part is configured to be an elastic part, and the elastic part has telescopic elasticity in the vertical direction; the supporting part is arranged at the lower end of the main body part and used for being supported below the radiator. According to the technical scheme, the radiator is supported through the supporting part of the tensioning device, at least part of the main body part of the tensioning device is configured to be the elastic part, vibration energy in the transportation process is absorbed through the telescopic elasticity of the elastic part in the vertical direction, so that the amplitude of the radiator is reduced, and the transportation efficiency is improved. Therefore, the risk of oil leakage at the welding seam of the radiator due to vibration is reduced.

Description

Technical Field

[0001] This application relates to the technical field of transformers, and particularly to a tensioning device. Background Art

[0002] In the existing combined transformer, the fin radiator and the transformer oil tank wall are usually fixed by welding two pipe joints distributed up and down. Multiple fin radiators are only fixed on the transformer oil tank by two pipe joints. Since the fin radiator of the transformer is long and the transportation distance is far, vibrations will occur during transportation, and the vibration effect will be transmitted from the oil tank to the radiator. When the amplitude is large, it will cause the fin radiator to shake and lead to potential oil leakage at the weld of the pipe joint. Utility Model Content

[0003] The main purpose of this application is to propose a tensioning device, aiming to reduce the risk of oil leakage of the radiator of the transformer during transportation.

[0004] To achieve the above object, the tensioning device proposed in this application is applied to a transformer. The transformer includes a transformer body, an oil tank connected to the transformer body, and a radiator installed outside the oil tank. The tensioning device includes:

[0005] A main body part, the upper end of the main body part is used to connect the oil tank and / or the transformer body, at least part of the main body part is configured as an elastic part, and the elastic part has telescopic elasticity in the up and down direction; and

[0006] A support part, which is arranged at the lower end of the main body part and is used to support under the radiator.

[0007] In one embodiment, the main body part includes a first connection section, the elastic part and a second connection section connected in sequence from bottom to top. The support part is connected to the lower end of the first connection section, and the upper end of the second connection section is used to connect the oil tank.

[0008] In one embodiment, the elastic part is configured as a tension spring.

[0009] In one embodiment, the main body part is inclined towards the oil tank in the up and down direction.

[0010] In one embodiment, one side of the second connection section close to the oil tank has a mating surface, the mating surface is a plane extending in the vertical direction, and the mating surface is welded to the oil tank.

[0011] In one embodiment, the elastic part is welded to the first connection section and the second connection section respectively.

[0012] In one embodiment, a plurality of the radiators are provided at intervals in the horizontal direction. The main body portion includes a plurality of tie rods. At least one tie rod is provided between two adjacent radiators. At least a part of at least one tie rod is configured as the elastic portion. The support portion includes a plurality of cross bars. At least one cross bar is connected to the lower end of one tie rod. The cross bar is used to support the radiator.

[0013] In one embodiment, two adjacent tie rods are connected by the cross bar.

[0014] In one embodiment, the radiator includes two oil pipes distributed in the vertical direction and a plurality of heat dissipation fins provided between the two oil pipes. The plurality of heat dissipation fins are arranged at intervals along the extending direction of the oil pipes and communicate with the two oil pipes. The support portion is connected to the lower oil pipe.

[0015] In one embodiment, the support portion is welded to the lower oil pipe.

[0016] In one embodiment, the elastic portion is higher than the upper oil pipe.

[0017] The technical solution of the present application supports the radiator through the support portion of the tensioning device, and transfers part of the weight to the fuel tank and / or the transformer body through the main body portion, avoiding oil leakage at the welding joints of the radiator due to sagging of the radiator; and by configuring at least a part of the main body portion of the tensioning device as an elastic portion, the vibration energy during transportation is absorbed by the telescopic elasticity of the elastic portion in the up and down direction to reduce the amplitude of the radiator, thereby reducing the risk of oil leakage at its weld due to vibration of the radiator itself. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0019] Figure 1 It is a side view of an embodiment of the transformer provided by the present application;

[0020] Figure 2 It is a front view of an embodiment of the transformer provided by the present application;

[0021] Figure 3 It is Figure 1 the front view of the tensioning device in

[0022] Figure 4 It is Figure 1Side view of the tensioning device;

[0023] Figure 5 is Figure 1 Top view of the tensioning device.

[0024] Explanation of the reference numerals in the drawings:

[0025] 10. Transformer; 100. Tensioning device; 200. Radiator; 300. Fuel tank; 400. Transformer body; 110. Main body part; 111. First connecting section; 112. Second connecting section; 1121. Fitting surface; 113. Elastic part; 114. Pull rod; 120. Support part; 121. Cross bar; 210. Oil pipeline; 220. Heat sink fin.

[0026] The realization, functional features and advantages of the purpose of this application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of this application will be clearly and completely described with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0028] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of this application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] This application provides a transformer 10.

[0031] Please refer to Figures 1 to 3 , in an embodiment of the present application, the tensioning device 100 is applied to the transformer 10. The transformer 10 includes a transformer body 400, an oil tank 300 connected to the transformer body 400, and a radiator 200 installed outside the oil tank 300. The tensioning device 100 includes a main body portion 110 and a support portion 120. The upper end of the main body portion 110 is used to connect to the oil tank 300. At least a part of the main body portion 110 is configured as an elastic portion 113, and the elastic portion 113 has telescopic elasticity in the up and down direction; the support portion 120 is provided at the lower end of the main body portion 110 and is used to support under the radiator 200.

[0032] Specifically, the transformer 10 is an electrical device used to change the AC voltage, mainly including a transformer body 400. The transformer body 400 usually includes a housing and structures such as an iron core, a primary coil, and a secondary coil provided in the housing. Through the principle of electromagnetic induction, the transformer 10 can convert the input voltage into different output voltages to achieve voltage increase or decrease. In addition, the transformer 10 further includes an oil tank 300, a radiator 200, and a tensioning device 100. The oil tank 300 is used to hold oil, which not only serves as an insulating medium but also helps with heat dissipation. The radiator 200 can improve the heat dissipation efficiency. The tensioning device 100 connects the radiator 200 and the oil tank 300 to realize pulling the radiator 200 upward, so that part of the weight of the radiator 200 is shared by the oil tank 300, avoiding deformation of the radiator 200 and preventing phenomena such as sagging or oil leakage.

[0033] However, this design is not limited to this. In some other embodiments, the upper end of the main body portion 110 may not be connected to the oil tank 300, but is used to connect to the main body of the transformer 10, and the main body of the transformer 10 shares part of the weight of the radiator 200, as long as the radiator 200 can be tensioned. It is worth mentioning that when the upper end of the main body portion 110 is connected to the main body of the transformer 10, usually the upper end of the main body portion 110 will bypass the oil tank 300 above and then be connected to the main body of the transformer 10. In still some other embodiments, the upper end of the main body portion 110 can also be connected to both the oil tank 300 and the main body of the transformer 10 at the same time.

[0034] At least a part of the main body portion 110 is configured as an elastic portion 113. The elastic portion 113 has telescopic elasticity in the up and down direction. The elastic portion 113 can absorb and consume vibration energy through its deformation ability, thereby reducing the vibration amplitude of the tensioning device 100 and the radiator 200, achieving a shock absorption effect, thus reducing the vibration of the radiator 200 during transportation, reducing the stress on the welds of the components of the radiator 200 that are connected by welding, reducing the probability of oil leakage of the radiator 200 during transportation, and further improving the reliability of the radiator 200.

[0035] In an embodiment, please refer toFigures 2 to 4 , the main body part 110 includes a first connecting section 111, an elastic section 113, and a second connecting section 112 that are connected in sequence from bottom to top. The supporting section 120 is connected to the lower end of the first connecting section 111, and the upper end of the second connecting section 112 is used to connect to the fuel tank 300.

[0036] The first connecting section 111, the second connecting section 112, and the supporting section 120 can be made of metal materials to ensure the strength of the overall structure of the tensioning device 100. By connecting the supporting section 120 to the lower end of the first connecting section 111, the first connecting section 111 and the supporting section 120 can be directly connected by welding, making the connection between the main body part 110 and the supporting section 120 more firm and the processing of the tensioning device 100 more convenient. By using the upper end of the second connecting section 112 to connect to the fuel tank 300, the second connecting section 112 and the fuel tank 300 can be directly connected by welding, making the installation of the tensioning device 100 more convenient.

[0037] The elastic section 113 is provided between the first connecting section 111 and the second connecting section 112. When the radiator 200 is vibrated, the supporting section 120 transmits the vibration energy of the radiator 200 to the first connecting section 111, and then the first connecting section 111 transmits it to the elastic section 113. After the elastic section 113 deforms, it absorbs and consumes the vibration energy, thereby achieving the effect of damping the radiator 200 and further reducing the risk of oil leakage at the weld of the radiator 200 due to vibration.

[0038] In this embodiment, the lengths of the first connecting section 111 and the second connecting section 112 can be adjusted according to the actual situation. Their lengths can be the same or different, so that the position of the elastic section 113 on the main body part 110 changes according to the changes in the lengths of the first connecting section 111 and the second connecting section 112. It can be understood that when the length of the first connecting section 111 is larger, the elastic section 113 is closer to the upper end of the main body part 110; when the length of the second connecting section 112 is larger, the elastic section 113 is closer to the lower end of the main body part 110; when the lengths of the first connecting section 111 and the second connecting section 112 are close, the elastic section 113 is closer to the middle of the main body part 110.

[0039] In another embodiment, the main body part 110 includes a first connecting section 111 and an elastic section 113 that are connected in sequence from bottom to top. The supporting section 120 is connected to the lower end of the first connecting section 111, and the upper end of the elastic section 113 is used to connect to the fuel tank 300.

[0040] In yet another embodiment, the main body portion 110 includes an elastic portion 113 and a second connecting section 112 connected in sequence from bottom to top. The supporting portion 120 is connected to the lower end of the elastic portion 113, and the upper end of the second connecting section 112 is used to connect to the fuel tank 300. Since the elastic portion 113 is directly connected to the supporting portion 120, when the radiator 200 is vibrated, the vibration energy can be directly transmitted to the elastic portion 113 more quickly through the supporting portion 120.

[0041] In still another embodiment, elastic portions 113 are provided at both the upper end and the lower end of the main body portion 110. The elastic portion 113 located at the upper end of the main body portion 110 is connected to the fuel tank 300, and the elastic portion 113 located at the lower end of the main body portion 110 is connected to the supporting portion 120. By providing elastic portions 113 at both ends of the main body portion 110, the overall elastic deformation ability of the tensioning device 100 is increased.

[0042] In one embodiment, please refer to Figures 3 to 5 , the elastic portion 113 is configured as a tension spring.

[0043] The tension spring can absorb external impacts and vibrations, thereby reducing the vibration of the radiator 200, reducing the stress on the welds of the radiator 200 itself, thereby reducing the risk of oil leakage from the radiator 200 and improving the reliability of the radiator 200. The elastic portion 113 can withstand a large pressure, and the corresponding elastic portion 113 can be selected according to the actual specifications of the radiator 200. In one embodiment, the ultimate pressure that the elastic portion 113 can withstand is at least above 600 kg. In other embodiments, the elastic portion 113 can also be a rubber strip, a silica gel strip, etc.

[0044] In one embodiment, please refer to Figure 1 and Figure 4 , the main body portion 110 is inclined towards the fuel tank 300 in the direction from bottom to top.

[0045] The radiator 200 is installed outside the fuel tank 300, and the supporting portion 120 is provided at one end of the radiator 200 away from the fuel tank 300 to provide better support for the radiator 200. The main body portion 110 is inclined towards the fuel tank 300 in the direction from bottom to top. On the one hand, the main body portion 110, the side wall of the fuel tank 300, and the bottom of the radiator 200 form a triangular structure, and the tensioning effect of the tensioning device 100 on the radiator 200 is better and more stable; on the other hand, the second connecting section 112 of the main body portion 110 can be directly connected to the side wall of the fuel tank 300, and there is no need to provide an outwardly extending top shell at the top end of the side wall of the fuel tank 300 to connect with the second connecting section 112, thereby reducing the production cost.

[0046] In one embodiment, please refer to Figure 1 and Figure 4, on one side of the second connecting section 112 close to the fuel tank 300, there is a mating surface 1121. The mating surface 1121 is a plane extending in the vertical direction, and the mating surface 1121 is welded to the fuel tank 300.

[0047] The mating surface 1121 fits precisely with the side wall surface of the fuel tank 300 to ensure a firm connection between the second connecting section 112 and the fuel tank 300. The mating surface 1121 is a plane extending in the vertical direction, which is beneficial to simplifying the manufacturing process, improving the welding quality and efficiency. In addition, the mating surface 1121 in the vertical direction also helps to apply uniform pressure during installation to ensure the welding quality. Welding the mating surface 1121 to the fuel tank 300 not only ensures the firm connection between the tensioning device 100 and the fuel tank 300, but also prevents the insulating oil inside the fuel tank 300 from leaking. The welding process can be manual welding, automatic welding, argon arc welding, etc.

[0048] In other embodiments, the second connecting section 112 can also be connected to the fuel tank 300 through fasteners such as bolts. Since the elastic part 113 is provided in the tensioning device 100, the elastic part 113 can reduce the vibration between the tensioning device 100 and the fuel tank 300, thereby reducing the risk of the bolts loosening due to vibration and causing the tensioning device 100 to fail.

[0049] In one embodiment, the elastic part 113 is welded to the first connecting section 111 and the second connecting section 112 respectively.

[0050] The elastic part 113 is fixedly connected to the first connecting section 111 and the second connecting section 112 respectively through the welding connection method. Welding can provide good connection strength and stability, thereby ensuring the tight connection between the elastic part 113 and the first connecting section 111, and between the elastic part 113 and the second connecting section 112, realizing the stability and reliability of the overall structure of the tensioning device 100, and further ensuring the tensioning effect of the tensioning device 100 on the radiator 200. Specifically, gas shielded welding, laser welding and other methods can be adopted.

[0051] In one embodiment, please refer to Figure 2 and Figure 3 , a plurality of radiators 200 are arranged at intervals in the horizontal direction. The main body part 110 includes a plurality of tie rods 114. At least one tie rod 114 is provided between two adjacent radiators 200. At least a part of at least one tie rod 114 is configured as the elastic part 113. The support part 120 includes a plurality of cross bars 121. At least one cross bar 121 is connected to the lower end of a tie rod 114. The cross bar 121 is used to support the radiator 200.

[0052] The main body part 110 includes a plurality of tie rods 114, and the support part 120 includes a plurality of cross bars 121. Each tie rod 114 can be connected to one cross bar 121 or multiple cross bars 121. The cross bars 121 are arranged below the radiator 200 to support the radiator 200; the tie rods 114 are connected to the cross bars 121, so that part of the weight of the radiator 200 can be transmitted to the fuel tank 300 through the cross bars 121 and the tie rods 114, and the fuel tank 300 shares this part of the weight. This part of the weight can be evenly distributed on the fuel tank 300 through a plurality of tie rods 114, which can avoid excessive force concentration in some areas of the fuel tank 300. In addition, by setting the plurality of cross bars 121 and tie rods 114 in this way, the tensioning device 100 can be expanded and flexibly adjusted according to different specifications of the transformer 10 or different distributions of the radiator 200. The tie rods 114 and the cross bars 121 should be understood in a broad sense. The tie rods 114 and the cross bars 121 can be rod-shaped, tubular, or plate-shaped, and are not limited herein.

[0053] In one embodiment, the upper end of each tie rod 114 is connected to the fuel tank 300, and at least part of each tie rod 114 is configured as an elastic part 113 to ensure the overall synchronism and balance of the tensioning device 100 when it is stressed. At the same time, the more the number of elastic parts 113 is set, the more vibration energy is absorbed, and the better the shock absorption effect of the tensioning device 100 is.

[0054] In one embodiment, please refer to Figure 3 and Figure 5 , adjacent two tie rods 114 are connected by a cross bar 121.

[0055] Adjacent two tie rods 114 are connected by a cross bar 121, and the overall structure of the tensioning device 100 is more stable. Through the corresponding support of the plurality of cross bars 121 for the plurality of radiators 200, the radiator 200, the fuel tank 300, and the tensioning device 100 become an integral body, enhancing the stability of the radiator 200.

[0056] In one embodiment, please refer to Figure 2 , the radiator 200 includes two oil delivery pipes 210 distributed in the vertical direction and a plurality of radiating fins 220 arranged between the two oil delivery pipes 210. The plurality of radiating fins 220 are arranged at intervals along the extending direction of the oil delivery pipes 210 and are communicated with the two oil delivery pipes 210; the support part 120 is connected to the lower oil delivery pipe 210.

[0057] The radiator 200 has two upper and lower oil pipes 210, and each fin 220 communicates with the upper and lower oil pipes 210. Since the density of the hot oil decreases, the heated oil in the fuel tank will move upward, thereby generating an upper and lower pressure difference. The high-pressure hot oil in the upper part will then flow into the fin 220 through the upper oil pipe 210. After being cooled by the fin 220, it flows out from the lower oil pipe 210 and returns to the lower part of the fuel tank, thus forming a natural circulation loop. During the process of oil circulation, the fin 220 increases the contact area between the oil and the surrounding air, thereby improving the heat exchange efficiency. Air circulates between the fins 220, taking away the heat transferred by the oil to achieve the cooling purpose. The material of the fin 220 is usually a metal with good thermal conductivity, usually carbon steel, and can also be aluminum, steel-aluminum composite pipe, copper, etc.

[0058] The support part 120 is directly connected to the lower oil pipe 210 without connecting to each fin 220. This not only reduces the volume and material consumption of the support part 120, but also saves the processing procedures for connecting the support part 120 to each fin 220. By supporting the lower oil pipe 210, the support part 120 can support the entire radiator 200, ensuring the stability of the overall structure of the radiator 200.

[0059] In one embodiment, the support part 120 is welded to the lower oil pipe 210.

[0060] The support part 120 is connected and welded to the lower oil pipe 210. The support part 120 can provide a stable support for the radiator 200, ensuring a firm connection between the support part 120 and the oil pipe 210, thereby ensuring the stability and reliability of the radiator 200. At the same time, it can also prevent the oil pipe 210 from being misaligned with the support part 120 due to vibration, resulting in support failure.

[0061] In one embodiment, please refer to Figure 1 and Figure 2 , the elastic part 113 is higher than the upper oil pipe 210.

[0062] The elastic part 113 is higher than the upper oil pipe 210. On the one hand, it avoids interference between the elastic part 113 and the fin 220, which is not conducive to the welding operation of the elastic part 113. On the other hand, it can reduce the gap between two adjacent radiators 200, thereby saving the space occupied by the elastic part 113 in the horizontal direction, reducing the overall volume of the transformer 10, or increasing the heat dissipation area of the radiator 200.

[0063] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A tensioning device, applied to a transformer, the transformer comprising a transformer body, an oil tank connected to the transformer body, and a radiator installed outside the oil tank, characterized in that: The tensioning device comprises: a main body, the upper end of which is used to connect the oil tank and / or the transformer body, at least part of which is configured as an elastic part, and the elastic part has telescopic elasticity in the up-down direction; and A support portion is disposed at the lower end of the main body and is used to support below the radiator.

2. The tensioning device according to claim 1, characterized in that The main body includes a first connecting section, the elastic section, and a second connecting section which are sequentially connected from bottom to top. The supporting section is connected to the lower end of the first connecting section, and the upper end of the second connecting section is used to connect to the oil tank.

3. The tensioning device according to claim 2, characterized in that The elastic portion is configured as a tension spring.

4. The tensioning device according to claim 2, characterized in that The main body is arranged to be inclined toward the oil tank in a direction from bottom to top.

5. The tensioning device according to claim 2, characterized in that: The second connecting section has a mating surface on one side close to the oil tank, the mating surface is a plane extending in a vertical direction, and the mating surface is welded to the oil tank; and / or The elastic portion is welded to the first connecting section and the second connecting section respectively.

6. The tensioning device according to claim 1, characterized in that: The radiators are arranged in plurality at intervals in the horizontal direction, the main body includes a plurality of tie rods, at least one tie rod is arranged between two adjacent radiators, at least a portion of at least one tie rod is configured as the elastic portion, the supporting portion includes a plurality of cross bars, at least one cross bar is connected to the lower end of a tie rod, and the cross bar is used to support the radiator.

7. The tensioning device according to claim 6, characterized in that: Two adjacent pull rods are connected via the cross bar.

8. The tensioning device according to claim 1, characterized in that: The radiator includes two oil pipelines distributed in a vertical direction and a plurality of heat sinks arranged between the two oil pipelines. The plurality of heat sinks are arranged at intervals along the extension direction of the oil pipelines and are connected to the two oil pipelines. The support portion is connected to the oil pipeline located below.

9. The tensioning device according to claim 8, characterized in that: The support portion is welded to the oil delivery pipe located below.

10. The tensioning device according to claim 9, characterized in that: The elastic portion is higher than the oil delivery pipe located above.

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