High-overload high-temperature-resistant oil-immersed transformer

Abstract

The utility model relates to the technical field of oil-immersed transformers, in particular to a high-overload high-temperature-resistant oil-immersed transformer which comprises a transformer body, an oil inlet pipe is installed on the right side of the top of the transformer body, a sealing cover is arranged on the top of the oil inlet pipe, and a fixing ring is installed on the top of the oil inlet pipe. Clamping blocks are inserted into the left side and the right side of the inner wall of the fixing ring, and a connecting ring is installed at the bottom of the sealing cover. The oil-immersed transformer has the beneficial effects that the pull block is pulled to drive the two clamping blocks to move back to back, so that an operator can open the sealing cover conveniently, new oil is injected into the oil-immersed transformer through the oil inlet pipe, meanwhile, the clamping blocks are pushed to be inserted into the inner walls of the clamping grooves all the time through the elastic force of the reset springs, and therefore the firmness and the sealing performance between the sealing cover and the oil inlet pipe are improved; and the contact between oil and gas in the transformer body can be effectively reduced, so that the heat dissipation performance is enhanced, and the high temperature resistance and the high overload performance of the oil-immersed transformer are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-immersed transformers, in particular to a high-overload and high-temperature resistant oil-immersed transformer. Background Art

[0002] In the power system, the oil-immersed transformer is a key equipment. Its main function is to convert the voltage of electric energy from one level to another. In the oil-immersed transformer, the coil is immersed in insulating oil, which not only improves the insulation performance of the coil, but also effectively helps dissipate heat. By adding a special heat dissipation mechanism, the oil-immersed transformer can adapt to high temperature and high load working environment, ensuring its safe and efficient operation.

[0003] In the prior art, in the maintenance process of traditional oil-immersed transformers, oil change is a key operation for maintaining the performance and safety of the transformer. However, the covers of these transformers are usually connected to the oil inlet pipe by multiple bolts. This design is particularly inconvenient when changing the oil. The operator needs to manually unscrew these bolts one by one to fill or change the oil. This process is not only time-consuming, but also increases the complexity of the operation, thereby affecting the overall oil change efficiency. The existing design adopts a method of threaded connection between the cover and the oil inlet pipe to facilitate subsequent oil change operations. However, this threaded connection method, although it provides convenient installation and disassembly at the beginning, leads to loosening of the connection after long-term use. In particular, there is no effective fixing mechanism, which not only reduces the sealing performance of the cover, but also affects the sealing of the insulating oil inside the transformer.

[0004] Therefore, a high overload and high temperature resistant oil-immersed transformer is needed to solve the problem that the sealing cover of the oil inlet pipe of the existing oil-immersed transformer is easy to loosen after long-term use, resulting in poor sealing. Utility Model Content

[0005] The utility model aims to provide a high overload and high temperature resistant oil immersed transformer to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high overload and high temperature resistant oil-immersed transformer, comprising a transformer body, an oil inlet pipe is installed on the top right side of the transformer body, a cover is provided on the top of the oil inlet pipe, a fixing ring is installed on the top of the oil inlet pipe, blocks are inserted on the left and right sides of the inner wall of the fixing ring, a connecting ring is installed on the bottom of the cover, and card grooves are provided on the left and right sides of the connecting ring.

[0007] Preferably, the fixing ring is provided with slide grooves on both sides, the inner wall of the slide groove is installed with a limit plate, and the left and right sides of the limit plates are separated by a pull block, and the outer side of the pull block is sleeved with a return spring.

[0008] Preferably, the adjacent sides of the limit plates on the left and right sides are both installed between the clamping blocks, and the adjacent ends of the pull blocks on the left and right sides pass through the slide groove.

[0009] Preferably, one end of the return spring is installed between the limiting plate, and the other end is installed between the inner wall of the slide groove, and the return spring is arranged on the inner wall of the slide groove.

[0010] Preferably, a sealing ring is installed on the top of the fixing ring, a mounting groove is provided on the bottom of the sealing cover, and the sealing ring is plugged into the inner wall of the mounting groove.

[0011] Preferably, a plurality of clamps are installed at the bottom of the sealing ring, a plurality of plug-in grooves are opened at the top of the fixing ring, and the clamps are clamped on the inner walls of the plug-in grooves.

[0012] Preferably, the connecting ring is threadedly connected to the inner wall of the fixing ring, and the clamping blocks on the left and right sides both pass through the sliding groove and are inserted into the inner wall of the clamping groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The high-overload and high-temperature resistant oil-immersed transformer proposed by the utility model drives the two clamping blocks to move in opposite directions by pulling the pulling block, so that it is convenient for the operator to open the cover so as to inject new oil into the oil-immersed transformer through the oil inlet pipe. At the same time, the elastic force of the reset spring is used to push the clamping block to always be inserted into the inner wall of the clamping groove, so as to increase the firmness and sealing between the cover and the oil inlet pipe. In addition, it can also effectively reduce the contact between the oil and gas in the transformer body, so as to enhance its heat dissipation performance, and further improve the high temperature resistance and high overload performance of the oil-immersed transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the sealing ring structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the oil inlet pipe structure of the utility model;

[0018] Figure 4 for Figure 3 Structural cross-section at AA in the middle;

[0019] Figure 5 for Figure 3 Structural cross-section at center BB.

[0020] In the figure: 1. Transformer body; 2. Oil inlet pipe; 3. Fixing ring; 4. Sealing ring; 5. Cover; 6. Slot; 7. Pull block; 8. Slide; 9. Limit plate; 10. Reset spring; 11. Block; 12. Clamp; 13. Mounting slot; 14. Connecting ring; 15. Plug-in slot. DETAILED DESCRIPTION

[0021] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1: Please refer to Figures 1 to 5 The utility model provides a technical solution: a high overload and high temperature resistant oil-immersed transformer, comprising a transformer body 1, an oil inlet pipe 2 is installed on the right side of the top of the transformer body 1, a cover 5 is arranged on the top of the oil inlet pipe 2, a fixing ring 3 is installed on the top of the oil inlet pipe 2, and a clamping block 11 is inserted on both sides of the inner wall of the fixing ring 3, and a connecting ring 14 is installed on the bottom of the cover 5, and a clamping groove 6 is opened on both sides of the left and right sides of the connecting ring 14; the connecting ring 14 is threadedly connected to the inner wall of the fixing ring 3, and the clamping blocks 11 on the left and right sides both penetrate the slide groove 8 and are inserted into the inner wall of the clamping groove 6. After the connecting ring 14 and the fixing ring 3 are threadedly connected, the clamping block 11 is inserted into the inner wall of the clamping groove 6, thereby increasing the firmness of the installation between the connecting ring 14 and the fixing ring 3 to prevent it from loosening, thereby improving the sealing effect of the cover 5, and reducing the contact between the oil and air inside the transformer body 1, thereby improving its heat dissipation performance and high overload performance.

[0023] First, drive the clamping blocks 11 on both sides to disengage from the clamping slot 6, and then the operator rotates the cover 5 to drive the connecting ring 14 at the bottom to gradually disengage from the fixing ring 3. At this time, the oil inlet pipe 2 can be used to inject new oil into the interior of the transformer body 1. After the oil change is completed, the cover 5 is reset and the connecting ring 14 is driven to be threadedly connected with the fixing ring 3, and the clamping blocks 11 on both sides are driven to be inserted into the inner wall of the clamping slot 6, so that the threaded connecting ring 14 is clamped, thereby increasing the firmness of the installation between the cover 5 and the fixing ring 3, and at the same time improving the sealing of the oil inlet pipe 2, further reducing the contact between oil and air, and improving the heat dissipation effect of the oil, thereby improving the heat dissipation effect of the transformer body 1, and increasing its high temperature resistance and high overload resistance.

[0024] Embodiment 2: On the basis of embodiment 1, in order to facilitate driving the card block 11 so that the operator can remove the cover 5, slide grooves 8 are opened on the left and right sides of the interior of the fixing ring 3, and the inner wall of the slide groove 8 is installed with a limit plate 9, and the side where the limit plates 9 on the left and right sides are separated is installed with a pull block 7, and the outer side of the pull block 7 is sleeved with a return spring 10; the side close to the limit plates 9 on the left and right sides is installed between the card block 11, and the end close to the pull blocks 7 on the left and right sides passes through the slide groove 8, and the card block 11 is limited by the limit plate 9, so as to prevent the card block 11 from escaping from the slide groove 8; one end of the return spring 10 is installed between the limit plate 9, and the other end is installed between the inner wall of the slide groove 8, and the return spring 10 is arranged on the inner wall of the slide groove 8, so that the elastic force of the return spring 10 is used to drive the card block 11 to always be plugged into the inner wall of the card groove 6, thereby improving the firmness of the installation of the cover 5.

[0025] First, pull the pull blocks 7 on both sides to move backwards, thereby driving the limit plate 9 to slide along the inner wall of the slide groove 8, and at the same time drive the block 11 to disengage from the slot 6 and squeeze the reset spring 10. At this time, the operator rotates the cover 5 to drive the connecting ring 14 at the bottom to gradually disengage from the fixed ring 3. At this time, use the oil inlet pipe 2 to inject new oil into the interior of the transformer body 1. After completion, reset the cover 5 and drive the connecting ring 14 to be threadedly connected with the fixed ring 3. At the same time, loosen the pull blocks 7 on both sides, and use the elastic force of the reset spring 10 to drive the limit plate 9 to reset, and drive the blocks 11 on both sides to always be inserted into the inner wall of the slot 6, so as to clamp the screwed connecting ring 14, thereby increasing the firmness of the installation between the cover 5 and the fixed ring 3.

[0026] Embodiment 3: On the basis of Embodiment 2, in order to further increase the sealing between the cover 5 and the fixing ring 3 and reduce the contact between oil and gas inside the transformer body 1, a sealing ring 4 is installed on the top of the fixing ring 3, and a mounting groove 13 is opened at the bottom of the cover 5, and the sealing ring 4 is inserted into the inner wall of the mounting groove 13.

[0027] When the cover 5 is reset, the connecting ring 14 at its bottom is driven to be screwed with the fixing ring 3. At this time, the cover 5 will gradually move downward and contact with the sealing ring 4. When the cover 5 is completely reset, the bottom mounting groove 13 will be sleeved on the outside of the sealing ring 4, so as to increase the sealing between the cover 5 and the fixing ring 3 by using the sealing ring 4.

[0028] Embodiment 4: Based on embodiment 3, in order to facilitate replacement of the sealing ring 4 , a plurality of clamping heads 12 are installed at the bottom of the sealing ring 4 , a plurality of plug-in grooves 15 are opened at the top of the fixing ring 3 , and the clamping heads 12 are clamped on the inner walls of the plug-in grooves 15 .

[0029] When the sealing ring 4 needs to be replaced, first open the cover 5, then pull the sealing ring 4 upward to drive the clamping head 12 at its bottom to disengage from the insertion groove 15, and then the sealing ring 4 can be replaced. After completion, plug the sealing ring 4 downward and drive the clamping head 12 to clamp to the inner wall of the insertion groove 15, so that the sealing ring 4 and the fixing ring 3 are installed together, which makes it convenient for the operator to replace, so as to improve the sealing performance of the installation between the oil inlet pipe 2 and the cover 5.

[0030] In actual use, first pull the pull blocks 7 on both sides to move backward, thereby driving the limit plate 9 to slide along the inner wall of the slide groove 8, and at the same time drive the card block 11 to disengage from the card groove 6 and squeeze the reset spring 10. At this time, the operator rotates the cover 5 to drive the connecting ring 14 at the bottom to gradually disengage from the fixed ring 3. At this time, the oil inlet pipe 2 can be used to inject new oil into the interior of the transformer body 1. After the oil change is completed, the cover 5 is reset and the connecting ring 14 is driven to be threadedly connected with the fixed ring 3, and the installation groove 13 is set on the outside of the sealing ring 4. At this time, the pull blocks 7 on both sides are loosened, and the elastic force of the reset spring 10 is used to drive the limit plate 9 to reset, and drive the card blocks 11 on both sides to be inserted into the inner wall of the card groove 6, so that the screwed connecting ring 14 is stuck, thereby increasing the firmness of the installation between the cover 5 and the fixed ring 3, and at the same time improving the sealing of the oil inlet pipe 2, further reducing the contact between oil and air, and improving the heat dissipation effect of the oil, thereby improving the heat dissipation effect of the transformer body 1, and increasing its high temperature resistance and high overload resistance;

[0031] When the sealing ring 4 needs to be replaced, first open the cover 5, then pull the sealing ring 4 upward to drive the clamping head 12 at its bottom to disengage from the insertion groove 15, and then the sealing ring 4 can be replaced. After completion, plug the sealing ring 4 downward and drive the clamping head 12 to clamp to the inner wall of the insertion groove 15, so that the sealing ring 4 and the fixing ring 3 are installed together, which makes it convenient for the operator to replace, so as to improve the sealing performance of the installation between the oil inlet pipe 2 and the cover 5.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high overload and high temperature resistant oil-immersed transformer, comprising a transformer body (1), an oil inlet pipe (2) is installed on the right side of the top of the transformer body (1), and a cover (5) is provided on the top of the oil inlet pipe (2), characterized in that: A fixing ring (3) is installed on the top of the oil inlet pipe (2), and clamping blocks (11) are inserted on the left and right sides of the inner wall of the fixing ring (3). A connecting ring (14) is installed on the bottom of the sealing cover (5), and clamping grooves (6) are opened on the left and right sides of the connecting ring (14).

2. A high overload and high temperature resistant oil immersed transformer according to claim 1, characterized in that: The fixing ring (3) is provided with a slide groove (8) on both the left and right sides thereof, and a limit plate (9) is installed on the inner wall of the slide groove (8). A pull block (7) is installed on the separated side of the limit plates (9) on the left and right sides, and a return spring (10) is sleeved on the outer side of the pull block (7).

3. A high overload and high temperature resistant oil immersed transformer according to claim 2, characterized in that: The adjacent sides of the limit plates (9) on the left and right sides are installed between the clamping blocks (11), and the adjacent ends of the pull blocks (7) on the left and right sides pass through the slide grooves (8).

4. A high overload and high temperature resistant oil immersed transformer according to claim 2, characterized in that: One end of the return spring (10) is installed between the limit plate (9), and the other end is installed between the inner wall of the slide groove (8), and the return spring (10) is arranged on the inner wall of the slide groove (8).

5. The high overload and high temperature resistant oil immersed transformer according to claim 1, characterized in that: A sealing ring (4) is installed on the top of the fixing ring (3), a mounting groove (13) is provided on the bottom of the sealing cover (5), and the sealing ring (4) is inserted into the inner wall of the mounting groove (13).

6. A high overload and high temperature resistant oil immersed transformer according to claim 5, characterized in that: A plurality of clamping heads (12) are installed at the bottom of the sealing ring (4), a plurality of inserting grooves (15) are opened at the top of the fixing ring (3), and the clamping heads (12) are clamped on the inner walls of the inserting grooves (15).

7. The high overload and high temperature resistant oil immersed transformer according to claim 1, characterized in that: The connecting ring (14) is threadedly connected to the inner wall of the fixing ring (3), and the clamping blocks (11) on the left and right sides both penetrate the sliding groove (8) and are inserted into the inner wall of the clamping groove (6).

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