Transformer oil radiator and preparation method and packaging method thereof

Abstract

The invention discloses a transformer oil radiator as well as a preparation method and a packaging method thereof. The transformer oil radiator comprises two oil chamber assemblies and a radiating core assembly arranged between the two oil chamber assemblies, each oil chamber assembly comprises an oil collecting pipe and a plurality of oil chambers vertically communicated with the oil collecting pipe, the oil chambers of the two oil chamber assemblies are in one-to-one correspondence, and a plurality of flow dividing openings are formed in the oil chambers; the heat dissipation core assembly comprises a plurality of cooling pipes, and the two ends of each cooling pipe communicate with the corresponding flow dividing openings in the oil chambers correspondingly. The oil chamber and the cooling pipe are made of rust-proof high-strength aluminum alloy materials, and the oil chamber and the cooling pipe are welded through the aluminum alloy brazing technology. According to the invention, through improvement of the material and the welding mode, the internal cleanliness is ensured to the greatest extent while the light weight of the transformer oil radiator is realized, a transformer oil flushing process is adopted inside, an internal paint filling process of an old iron sheet radiator can be completely replaced, the process difficulty is reduced, the manufacturing cost is saved, a paint coating process is canceled, and the production efficiency is improved. The influence on the environment is reduced to the minimum.

Description

Technical Field

[0001] The invention relates to the technical field of transformer heat dissipation, and in particular to a transformer oil radiator and a preparation method and a packaging method thereof. Background Art

[0002] The existing transformer oil radiator has a heat dissipation core which is generally composed of a number of steel finned tubes arranged in parallel, which are generally connected by argon arc welding. On the one hand, it has a large weight, resulting in high transportation costs and inconvenient assembly. On the other hand, the internal space will be polluted during welding and assembly. It is usually necessary to paint after assembly. However, the peeling of the coating layer will still affect the cleanliness of the internal space during long-term use.

[0003] In addition, the current transformer oil radiator has a large size and lacks a better packaging method, resulting in high transportation costs. Summary of the invention

[0004] The object of the present invention is to provide a transformer oil radiator and a preparation method and a packaging method thereof, so as to solve the problems existing in the existing transformer oil radiator.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transformer oil radiator, comprising two oil chamber assemblies and a heat dissipation core assembly arranged between the two oil chamber assemblies; the oil chamber assembly comprises an oil collecting pipe and a plurality of oil chambers vertically connected to the oil collecting pipe, the oil chambers of the two oil chamber assemblies correspond to each other one by one, and a plurality of diversion ports are opened on the oil chambers; the heat dissipation core assembly comprises a plurality of cooling pipes, and the two ends of the cooling pipes are respectively connected to the diversion ports on the corresponding oil chambers; the oil chambers and cooling pipes are made of aluminum alloy, and the oil collecting pipes, the oil chambers and the cooling pipes are fixed by an integral brazing process.

[0006] Preferably, in the brazing process, the brazing flux is NOCOLOK.

[0007] Preferably, in the brazing process, the brazing furnace adopts a NB continuous brazing furnace.

[0008] Preferably, heat dissipation fins are provided between adjacent cooling tubes.

[0009] Preferably, the heat dissipation fins are continuously bent and arranged obliquely.

[0010] The present invention also provides the following technical solution: a method for preparing a transformer oil radiator, the preparation method comprising the following steps:

[0011] Step 1: prefabrication of the oil collecting pipe, the oil chamber and the cooling pipe, wherein the oil chamber is formed by stamping of aluminum alloy;

[0012] Step 2, assembling the oil chamber and the cooling pipe and sending them into a brazing furnace for overall brazing;

[0013] Step 3, welding the oil collecting pipe to the oil chamber brazed in step 2;

[0014] Step 4: After sealing and leak detection, use transformer oil to flush the inner wall. After flushing, control the oil and seal.

[0015] The present invention also provides the following technical solution: a packaging method for a transformer oil radiator, comprising the following steps:

[0016] Step 1, respectively installing packaging buckles at both ends of the oil chamber of the transformer oil radiator, wherein the outer side of the packaging buckle is provided with a positioning groove arranged along the direction of the oil collecting pipe, so that the positioning grooves on the packaging buckles in the same row are located in a straight line, and the positioning grooves in a straight line are defined as positioning lines;

[0017] Step 2, placing a transformer oil radiator on a packaging base, wherein the packaging base is provided with two positioning strips matching the bottom positioning line;

[0018] Step 3: Place positioning rods in the two positioning lines on the top of the transformer oil radiator, and stack another transformer oil radiator on top so that the positioning lines match the positioning rods;

[0019] Step 4: Repeat the above steps to stack multiple transformer oil radiators in sequence;

[0020] Step 5: Fixing ears are pre-set on the oil collecting pipes on both sides of the transformer oil radiator. All fixing ears on the same side of multiple transformer oil radiators are fixed on a steel bar. The fixing ears on both sides are fixed respectively and the packaging is completed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention improves the material and welding method, so that the transformer oil radiator can be lightweight while ensuring the internal cleanliness to the greatest extent. The transformer oil flushing process is used internally, which can completely replace the internal paint filling process of the old iron sheet radiator, reducing the process difficulty, saving manufacturing costs, canceling the paint coating process, and minimizing the impact on the environment.

[0023] 2. The present invention enables the transformer oil radiator to be lightweight to the greatest extent, and the installation space is further reduced. Combined with the packaging method provided by the present invention, the packaging volume is compressed to the greatest extent while ensuring the stability of the packaging, thereby saving transportation costs for customers while reducing the floor space and reducing installation and use costs.

[0024] 3. The anti-rust durability of flake paint has been improved to a greater extent, and the average life span is increased by 3 to 5 years compared with iron flake paint. The paint film thickness can be reduced from the average 160 to 200 μm of iron flake paint to 40 to 60 μm. The use of environmentally friendly water-based two-component paint can minimize the negative impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the oil chamber component in the present invention.

[0027] Figure 3 It is a structural schematic diagram of the heat dissipation fins in the present invention.

[0028] Figure 4 It is a schematic diagram of the packaging structure of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of the packaging buckle in the present invention.

[0030] Figure 6 It is a structural schematic diagram of the cooling pipe in the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further specifically described below through embodiments.

[0032] Embodiment: A transformer oil radiator, referring to Figure 1-3 , including two sets of oil chamber components arranged opposite to each other and a heat dissipation core component arranged between the two for connecting the two.

[0033] The oil chamber assembly includes an oil collecting pipe 1 and a plurality of oil chambers 2 vertically connected to the oil collecting pipe. The oil chambers 2 of the two groups of oil chamber assemblies correspond to each other one by one, and a plurality of corresponding flow diversion ports 3 are opened on opposite sides.

[0034] The heat dissipation core assembly includes multiple layers of horizontally arranged cooling tubes 4, one end of which is connected to a diversion port on the oil chamber of one of the oil chamber assemblies by welding, and the other end is connected to a corresponding diversion port of the other oil chamber assembly, thereby forming multiple oil channels between the two oil chamber assemblies.

[0035] In this embodiment, a heat sink 5 is welded between every two adjacent cooling tubes 4. The heat sink fins 5 are continuously bent and tilted at a certain angle, which may be 40°-45°, preferably 45°. By tilting the heat sink fins 5, the air heated by the heat sink fins 5 can flow upward along the tilted channel, thereby forming heat convection, so that the radiator has a certain self-cooling ability and improves the heat dissipation performance. In addition, the debris accumulated in the heat sink fins 5 can also be automatically cleaned under the scouring of rainwater, and it is not easy to accumulate debris. In addition, in a preferred embodiment of the present invention, each surface of the heat sink fins 5 can also be set as a curved surface, which can increase the contact area between the heat sink fins and the air on the one hand, further improving the heat dissipation effect, and facilitate the scouring of rainwater on the other hand.

[0036] The transformer oil radiator of this embodiment is manufactured and assembled using the following steps:

[0037] Step 1: prefabrication of the oil collecting pipe 1, the oil chamber 2 and the cooling pipe 4;

[0038] The oil collecting pipe 1 is formed by laser cutting of seamless pipe, deburring and ultrasonic cleaning are carried out, and then the oil collecting pipe accessories (such as the fixing ears described below) are welded.

[0039] The oil chamber 2 is divided into a main plate and an oil chamber shell, both of which are stamped and formed by rust-proof high-strength aluminum alloy. After ultrasonic cleaning, the two are riveted together to form the oil chamber as a whole.

[0040] The cooling tube 4 can be purchased directly on the market, or can be made by extrusion molding of aluminum alloy;

[0041] Step 2: After the oil chamber 2, the cooling tube 4 and the heat dissipation fin 5 are assembled, they are sent into an NB continuous nitrogen protection brazing furnace and brazed using an aluminum alloy hard brazing process;

[0042] Step 3: Assemble the oil collecting pipe and the oil chamber brazed in step 2 and fix them by electric welding, correct the sheet shape and weld the reinforcing ribs, then weld the oil collecting pipe and the oil chamber by argon arc welding, and then weld the flange to the port of the oil collecting pipe;

[0043] Step 4: After sealing and leak detection, use transformer oil to flush the inner wall. After flushing, control the oil and seal the flange. Paint the outer wall and fill with nitrogen as needed, and then pack and store.

[0044] The above-mentioned preparation process improves the material and welding method, so that the transformer oil radiator can be lightweight while ensuring the internal cleanliness to the greatest extent. There is no need to use the old-fashioned iron sheet radiator painting process, which reduces the process difficulty and saves manufacturing costs.

[0045] This embodiment also provides a packaging method for the above transformer oil radiator, referring to Figure 4 , Figure 5 The oil collecting pipes on both sides of the transformer oil radiator are respectively pre-arranged with fixing ears 6, and the packaging assembly includes a packaging base 7, a packaging buckle 8, a positioning rod 9 and a steel bar 10.

[0046] The fixing ear 6 is provided with a through hole for fixing it to the steel bar 10 by bolts. The steel bar 10 is made of angle steel.

[0047] The packing clip 8 matches the end of the oil chamber 2 and can be stuck in the end of the oil chamber 2, and a positioning groove 81 is opened on its outer end surface. After the packing clip 8 is installed at the end of the oil chamber 2, the positioning groove 81 is consistent with the length direction of the oil collecting pipe 1, so that after all the two ends of the oil chambers 2 are equipped with packing clips 8, the positioning grooves 81 on the same row of packing clips 8 are located in a straight line. In this embodiment, the line composed of positioning grooves in a straight line is defined as a positioning line.

[0048] Two positioning strips 71 matching the positioning lines are provided on the packaging base 7 for positioning the lowest transformer oil radiator.

[0049] The positioning rod 9 can be placed in the positioning groove along the positioning line to be used for positioning two adjacent transformer oil radiators.

[0050] The packaging method specifically includes the following steps:

[0051] Step 1: Install packaging buckles 8 at both ends of all oil chambers 2 of the transformer oil radiator;

[0052] Step 2: Place a transformer oil radiator on the packaging base 7, with the oil collecting pipe 1 parallel to the ground, and make the bottom surface positioning lines of the transformer oil radiator match the two positioning strips 71 of the packaging base respectively;

[0053] Step 3, placing positioning rods 9 in the two positioning lines at the top of the transformer oil radiator in step 2, and stacking another transformer oil radiator on top so that the positioning lines match the positioning rods 9;

[0054] Step 4: Repeat the above steps to stack multiple transformer oil radiators in sequence;

[0055] Step 5: fix all the fixing ears 6 on the same side of multiple transformer oil radiators to a steel bar 10 by bolts, and fix the fixing ears on both sides respectively, and the packaging is completed.

[0056] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer oil radiator, comprising two oil chamber assemblies and a heat dissipation core assembly disposed between the two oil chamber assemblies; characterized in that: The oil chamber assembly includes an oil collecting pipe and a plurality of oil chambers vertically connected to the oil collecting pipe, the oil chambers of the two oil chamber assemblies correspond to each other one by one, and a plurality of diversion ports are opened on the oil chambers; The heat dissipation core assembly includes a plurality of cooling pipes, and both ends of the cooling pipes are respectively connected to the diversion ports on the corresponding oil chambers; The oil chamber and the cooling pipe are made of aluminum alloy, and are fixed by an integral brazing process.

2. A transformer oil radiator according to claim 1, characterized in that: In the brazing process, the brazing flux is NOCOLOK.

3. A transformer oil radiator according to claim 1, characterized in that: In the brazing process, the brazing furnace adopts a NB continuous brazing furnace.

4. A transformer oil radiator according to claim 1, characterized in that: Heat dissipation fins are arranged between adjacent cooling tubes.

5. A transformer oil radiator according to claim 4, characterized in that: The heat dissipation fins are continuously bent and arranged obliquely.

6. A method for preparing a transformer oil radiator according to any one of claims 1 to 5, characterized in that: The preparation method steps are as follows: Step 1: prefabrication of the oil collecting pipe, the oil chamber and the cooling pipe, wherein the oil chamber is formed by stamping of aluminum alloy; Step 2, assembling the oil chamber and the cooling pipe and sending them into a brazing furnace for overall brazing; Step 3, welding the oil collecting pipe to the oil chamber brazed in step 2; Step 4: After sealing and leak detection, use transformer oil to flush the inner wall. After flushing, control the oil and seal.

7. A method for packaging a transformer oil radiator according to any one of claims 1 to 5, characterized in that: The steps include: Step 1, respectively installing packaging buckles at both ends of the oil chamber of the transformer oil radiator, wherein the outer side of the packaging buckle is provided with a positioning groove arranged along the direction of the oil collecting pipe, so that the positioning grooves on the packaging buckles in the same row are located in a straight line, and the positioning grooves in a straight line are defined as positioning lines; Step 2, placing a transformer oil radiator on a packaging base, wherein the packaging base is provided with two positioning strips matching the bottom positioning line; Step 3: Place positioning rods in the two positioning lines on the top of the transformer oil radiator, and stack another transformer oil radiator on top so that the positioning lines match the positioning rods; Step 4: Repeat the above steps to stack multiple transformer oil radiators in sequence; Step 5: Fixing ears are pre-set on the oil collecting pipes on both sides of the transformer oil radiator. All fixing ears on the same side of multiple transformer oil radiators are fixed on a steel bar. The fixing ears on both sides are fixed respectively and the packaging is completed.

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