High-pressure sealing device for transformer

Abstract

The utility model relates to the technical field of transformers, in particular to a high-pressure sealing device for a transformer, which comprises an outgoing line terminal fixedly connected to the outer side of a transformer body, the top end of the outgoing line terminal is fixedly connected with an internal connecting terminal, and a terminal rubber sheath is sleeved on the outer side of the internal connecting terminal. A quick connector is fixedly connected to the outer side of the terminal rubber sheath, a connecting plug is clamped to the end, away from the terminal rubber sheath, of the quick connector, a cold shrinkage pipe is arranged at the joint of the connecting plug and the quick connector in a sleeving mode, and an insulated cable is fixedly connected to the end, away from the quick connector, of the connecting plug; compared with a high-pressure sealing mode for an existing transformer, the transformer has the advantages that the maintenance cost can be reduced through the design, the insulated cable is prevented from being damaged, the service life of the transformer is prolonged, and the service life of the transformer is prolonged. And meanwhile, the connection tightness of the insulated cable and the internal connection terminal is ensured.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and specifically to a high-voltage sealing device for transformers. Background Technology

[0002] Transformers are an indispensable piece of equipment in the power transmission process. As a device that converts voltage, the safety of transformers during use is extremely important. In particular, the treatment of transformer output terminals usually adopts high-voltage sealing devices to ensure safety during use. The high-voltage sealing device for transformers is a protection system specifically designed for the high-voltage output terminals and critical connection parts of transformers.

[0003] Currently, the main method for connecting transformer outgoing terminals and externally insulated cables involves using specialized crimping pliers to cold-press the copper / aluminum insulated cables to the outgoing terminals. This ensures a tight fit between the contact surfaces, preventing loosening and potential localized overheating. After cold-pressing the outgoing terminals and externally insulated cables, cold-shrink tubing is used to create a gapless insulation layer at the connection point for sealing, thus preventing corrosion from outdoor ultraviolet rays and rainwater. However, cold-shrink tubing is prone to aging and cracking under ultraviolet light and high temperatures (especially inferior materials). Losing its sealing function may lead to moisture absorption or contamination of the insulating medium. Furthermore, because the cold-shrink tubing and the cold-pressed connection point form an integrated structure, maintenance or replacement requires damaging the tubing and re-crimping, increasing maintenance costs and potentially damaging the cable itself.

[0004] Therefore, it is of great importance to design a high-voltage sealing device for transformers to solve the above-mentioned defects. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model designs a high-voltage sealing device for transformers. This high-voltage sealing device aims to solve the technical problem that, under existing technologies, the high-voltage sealing method for transformers requires the destruction of the bushing and re-crimping if maintenance or replacement is needed, which increases maintenance costs and may damage the cable body.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-voltage sealing device for a transformer includes an outgoing terminal fixedly connected to the outside of the transformer body. An internal connecting terminal is fixedly connected to the top of the outgoing terminal. A terminal rubber sheath is fitted over the outside of the internal connecting terminal. A quick connector is fixedly connected to the outside of the terminal rubber sheath. A connecting plug is snapped into the end of the quick connector away from the terminal rubber sheath. A cold shrink tube is fitted at the connection between the connecting plug and the quick connector. An insulated cable is fixedly connected to the end of the connecting plug away from the quick connector, and the insulated cable is inserted into the top of the internal connecting terminal. A clamping mechanism is fixedly installed at the top of the inside of the terminal rubber sheath.

[0008] As a preferred embodiment of this utility model, the bottom end of the terminal rubber sheath is fixedly connected to a mounting base, and the interior of the mounting base is fixedly connected to the outgoing terminal by multiple sets of fixing screws.

[0009] As a preferred embodiment of this utility model, the quick connector is slidably connected to a movable sleeve on its outer side, and a spring is sleeved on the outer side of the quick connector and inside the movable sleeve. Multiple sets of retaining balls are movably connected inside the quick connector. A retaining groove adapted to the retaining balls is opened on the outer side of the connector plug, and a clearance groove adapted to the retaining balls is opened at the front end of the movable sleeve.

[0010] As a preferred embodiment of this utility model, the outer side of the movable sleeve is provided with anti-slip texture, one end of the spring is fixedly connected to the outer side of the quick connector, and the other end of the spring is fixedly connected to the inner side of the movable sleeve.

[0011] As a preferred embodiment of this utility model, a first rubber sealing ring is fitted on the outer side of the quick connector and at the rear end of the movable sleeve, and a second rubber sealing ring is fitted on the outer side of the quick connector and at the front end of the movable sleeve.

[0012] As a preferred embodiment of this utility model, the clamping mechanism includes a bidirectional threaded rod rotatably connected to the top end inside the terminal rubber sheath. An operating knob is fixedly connected to one end of the bidirectional threaded rod located outside the terminal rubber sheath. Both ends of the bidirectional threaded rod are threadedly connected to connecting sleeves. The connecting sleeves are threadedly connected to the bidirectional threaded rod through internal threaded sleeves, and the threaded sleeves are rotatably connected to the connecting sleeves. A transmission rod is rotatably connected to the outer side of each of the two sets of connecting sleeves. A clamping block is rotatably connected between the two sets of transmission rods. A movable groove is provided at the connection point between the top end of the internal connecting terminal and the clamping block.

[0013] As a preferred embodiment of this utility model, a connecting block is fixedly connected to the outside of the operating knob, and a locking knob is threadedly connected to the inside of the connecting block, and the locking knob abuts against the outside of the terminal rubber sleeve.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. In this utility model, through the combined design of terminal rubber sleeve, quick connector, connecting plug and cold shrink tubing, when connecting the insulated cable to the outgoing terminal, the cold shrink tubing is first put on the outside of the quick connector, then the connecting plug and quick connector are quickly connected and fixed, and finally the cold shrink tubing is operated to shrink to seal the connection between the quick connector and the connecting plug. This not only facilitates the quick connection between the insulated cable and the outgoing terminal, but also allows for easy replacement after the cold shrink tubing ages and is cut open to separate the connecting plug and quick connector.

[0016] 2. In this utility model, through the design of the clamping mechanism, after the connector plug and quick connector are connected, the insulated cable is also inserted into the inside of the top of the internal connection terminal. Then, the clamping mechanism is used to press and fix the insulated cable, which further ensures the tightness of its connection with the internal connection terminal. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a diagram showing the connection status of the quick connector and the connecting plug of this utility model;

[0019] Figure 3 This is a diagram showing the quick connector and connecting plug of this utility model in a separated state;

[0020] Figure 4 This is a cross-sectional view of the overall internal structure of this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0022] Figure 6 for Figure 4 Enlarged view of section B in the middle.

[0023] In the diagram: 1. Transformer body; 2. Outgoing terminal; 3. Internal connection terminal; 4. Terminal rubber sleeve; 401. Mounting base; 402. Fixing screw; 5. Quick connector; 501. Movable sleeve; 502. Spring; 503. Ball retainer; 504. Slot; 505. Relief groove; 506. Anti-slip texture; 507. First rubber sealing ring; 508. Second rubber sealing ring; 6. Connecting plug; 7. Cold shrink tubing; 8. Insulated cable; 9. Clamping mechanism; 901. Bidirectional threaded rod; 902. Operating knob; 903. Connecting sleeve; 904. Transmission rod; 905. Clamping block; 906. Movable groove; 907. Connecting block; 908. Locking knob. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] Example: Please refer to Figures 1-6 This utility model provides a technical solution:

[0026] A high-voltage sealing device for a transformer includes an outgoing terminal 2 fixedly connected to the outside of the transformer body 1. An internal connecting terminal 3 is fixedly connected to the top of the outgoing terminal 2. A terminal rubber sleeve 4 is sleeved on the outside of the internal connecting terminal 3. A quick connector 5 is fixedly connected to the outside of the terminal rubber sleeve 4. A connecting plug 6 is snapped onto the end of the quick connector 5 away from the terminal rubber sleeve 4. A cold shrink tube 7 is sleeved at the connection between the connecting plug 6 and the quick connector 5. An insulated cable 8 is fixedly connected to the end of the connecting plug 6 away from the quick connector 5, and the insulated cable 8 is inserted into the inside of the top of the internal connecting terminal 3. A clamping mechanism 9 is fixedly installed on the top of the inside of the terminal rubber sleeve 4.

[0027] First, a mounting base 401 is fixedly connected to the bottom of the terminal rubber sleeve 4. The interior of the mounting base 401 is fixedly connected to the outgoing terminal 2 by multiple sets of fixing screws 402. After the terminal rubber sleeve 4 is put on the outside of the internal connecting terminal 3, the mounting base 401 is fixed by multiple sets of fixing screws 402, thereby firmly fixing the terminal rubber sleeve 4 to ensure its protective effect.

[0028] Furthermore, a movable sleeve 501 is slidably connected to the outer side of the quick connector 5. A spring 502 is fitted inside the movable sleeve 501 on the outer side of the quick connector 5. Multiple sets of retaining balls 503 are movably connected inside the quick connector 5. A retaining groove 504 adapted to the retaining balls 503 is opened on the outer side of the connector plug 6. A relief groove 505 adapted to the retaining balls 503 is opened at the front end of the movable sleeve 501. When connecting the insulated cable 8 to the outlet terminal 2, the cold shrink tube 7 is first fitted onto the outer side of the quick connector 5, and then the insulated cable 8 is inserted into the interior of the quick connector 5. During this process, the connector plug 6 is also inserted into the interior of the quick connector 5 to complete the connection. At this time, sliding the movable sleeve 501 backward causes the relief groove 505 to move to the outer side of the multiple sets of retaining balls 503. When the connector plug 6 is inserted... Multiple sets of retaining balls 503 are squeezed into the recessed groove 505, allowing the connector 6 to be smoothly inserted into the quick connector 5 until the insulated cable 8 is inserted into the top of the internal connector terminal 3. After the insulated cable 8 is fully inserted, the quick connector 5 is released. At this time, the spring 502 rebounds and resets the quick connector 5, thereby squeezing multiple sets of retaining balls 503 into the retaining groove 504, thus quickly connecting and fixing the connector 6 and the quick connector 5. Finally, the cold shrink tubing 7 is operated to shrink and seal the connection between the quick connector 5 and the connector 6. This not only facilitates the quick connection between the insulated cable 8 and the outlet terminal 2, but also allows for easy replacement of the connector 6 and quick connector 5 after the cold shrink tubing 7 ages by cutting it open, further reducing maintenance costs and avoiding damage to the insulated cable 8.

[0029] Then, the outer side of the movable sleeve 501 is provided with anti-slip texture 506. One end of the spring 502 is fixedly connected to the outer side of the quick connector 5, and the other end of the spring 502 is fixedly connected to the inner side of the movable sleeve 501. The anti-slip texture 506 facilitates the sliding of the movable sleeve 501 for operation. After the connecting plug 6 is connected to the quick connector 5, the movable sleeve 501 is constantly pushed under the action of the spring 502, thereby ensuring the tightness of the movable sleeve 501 and thus ensuring the firmness of the connection between the connecting plug 6 and the quick connector 5.

[0030] Furthermore, a first rubber sealing ring 507 is fitted on the outer side of the quick connector 5 and at the rear end of the movable sleeve 501, and a second rubber sealing ring 508 is fitted on the outer side of the quick connector 5 and at the front end of the movable sleeve 501. The sealing performance of the front and rear ends of the movable sleeve 501 is ensured by the first rubber sealing ring 507 and the second rubber sealing ring 508.

[0031] Secondly, the clamping mechanism 9 includes a bidirectional threaded rod 901 rotatably connected to the top end of the terminal rubber sleeve 4. An operating knob 902 is fixedly connected to one end of the bidirectional threaded rod 901 located outside the terminal rubber sleeve 4. Connecting sleeves 903 are threaded to both ends of the bidirectional threaded rod 901. The connecting sleeves 903 are threaded to the bidirectional threaded rod 901 via internal threaded sleeves, and are rotatably connected to the threaded sleeves. Transmission rods 904 are rotatably connected to the outer sides of both sets of connecting sleeves 903. A clamping block 905 is rotatably connected between the two sets of transmission rods 904. The top end of the internally connected terminal 3 is connected to the clamping block 905. A movable groove 906 is provided at the connection point. After the connector plug 6 is connected to the quick connector 5, the insulated cable 8 is also inserted into the interior of the top of the internal connection terminal 3. Then, the bidirectional threaded rod 901 is rotated by operating the knob 902. The threads at both ends of the bidirectional threaded rod 901 are opposite. When it rotates, it drives the threaded sleeves at both ends to move relative to each other, thereby driving the two sets of connecting sleeves 903 to move relative to each other at both ends of the bidirectional threaded rod 901. Then, under the transmission of the transmission rod 904, the clamping block 905 moves downward until it contacts the outside of the insulated cable 8 and presses it to fix it, further ensuring the tightness of its connection with the internal connection terminal 3.

[0032] Finally, a connecting block 907 is fixedly connected to the outside of the operating knob 902. A locking knob 908 is connected to the inside of the connecting block 907 by a thread. The locking knob 908 abuts against the outside of the terminal rubber sleeve 4. After the internal connecting terminal 3 is pressed and fixed by the clamping block 905, the locking knob 908 is tightened to make it abut against the outside of the terminal rubber sleeve 4, thereby preventing the operating knob 902 from rotating and ensuring the fixing effect of the clamping block 905 on the internal connecting terminal 3.

[0033] In this embodiment, the specific implementation scenario is as follows: After the terminal rubber sleeve 4 is placed on the outside of the internal connecting terminal 3, the mounting base 401 is fixed by multiple sets of fixing screws 402. When connecting the insulated cable 8 to the outgoing terminal 2, the cold shrink tube 7 is first placed on the outside of the quick connector 5, and then the insulated cable 8 is inserted into the inside of the quick connector 5. During this process, the connecting plug 6 is also inserted into the inside of the quick connector 5 to complete the connection. At this time, the movable sleeve 501 is slid backward to move the relief groove 505 to the outside of the multiple sets of retaining balls 503. When the connecting plug 6 is inserted, the multiple sets of retaining balls 503 are squeezed into the inside of the relief groove 505, so that the connecting plug 6 can be smoothly inserted into the inside of the quick connector 5 until the insulated cable 8 is inserted into the inside of the top of the internal connecting terminal 3. After the insulated cable 8 is fully inserted, the quick connector 5 is released. At this time, the spring 502 rebounds to reset the quick connector 5, thereby squeezing the multiple sets of retaining balls 503 into the inside of the retaining groove 504, thereby quickly connecting and fixing the connecting plug 6 and the quick connector 5. Finally, the operation... The shrink tubing 7 shrinks to seal the connection between the quick connector 5 and the connector plug 6, facilitating a quick connection between the insulated cable 8 and the outgoing terminal 2. Furthermore, after the shrink tubing 7 ages, it can be cut open to separate the connector plug 6 and quick connector 5 for replacement. After connecting the connector plug 6 and quick connector 5, the insulated cable 8 is inserted into the top of the internal connector terminal 3. Then, by operating the knob 902, the bidirectional threaded rod 901 is rotated. The threads at both ends of the bidirectional threaded rod 901 are opposite, and its rotation causes the threaded sleeves at both ends to move relative to each other. This causes the two sets of connecting sleeves 903 to move relative to each other at both ends of the bidirectional threaded rod 901. Subsequently, under the transmission of the transmission rod 904, the clamping block 905 moves downward until it contacts the outside of the insulated cable 8 and presses it firmly. The entire operation is simple and convenient. Compared with existing high-voltage sealing methods used in transformers, this invention reduces maintenance costs and avoids damage to the insulated cable 8, while ensuring a tight connection between the insulated cable 8 and the internal connector terminal 3.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage sealing device for a transformer, comprising an outgoing terminal (2) fixedly connected to the outside of the transformer body (1), characterized in that: An internal connection terminal (3) is fixedly connected to the top of the outgoing terminal (2). A terminal rubber sleeve (4) is fitted on the outside of the internal connection terminal (3). A quick connector (5) is fixedly connected to the outside of the terminal rubber sleeve (4). A connector plug (6) is snapped into the end of the quick connector (5) away from the terminal rubber sleeve (4). A cold shrink tube (7) is fitted at the connection between the connector plug (6) and the quick connector (5). An insulated cable (8) is fixedly connected to the end of the connector plug (6) away from the quick connector (5). The insulated cable (8) is inserted into the inside of the top of the internal connection terminal (3). A clamping mechanism (9) is fixedly installed at the top inside the terminal rubber sleeve (4).

2. The high-voltage sealing device for a transformer according to claim 1, characterized in that: The bottom end of the terminal rubber sleeve (4) is fixedly connected to a mounting base (401), and the interior of the mounting base (401) is fixedly connected to the outgoing terminal (2) by multiple sets of fixing screws (402).

3. The high-voltage sealing device for a transformer according to claim 1, characterized in that: The quick connector (5) is slidably connected to a movable sleeve (501). A spring (502) is sleeved on the outside of the quick connector (5) and inside the movable sleeve (501). Multiple sets of retaining balls (503) are movably connected inside the quick connector (5). A retaining groove (504) adapted to the retaining ball (503) is opened on the outside of the connector plug (6). A relief groove (505) adapted to the retaining ball (503) is opened at the front end of the movable sleeve (501).

4. A high-voltage sealing device for a transformer according to claim 3, characterized in that: The outer side of the movable sleeve (501) is provided with anti-slip texture (506), one end of the spring (502) is fixedly connected to the outer side of the quick connector (5), and the other end of the spring (502) is fixedly connected to the inner side of the movable sleeve (501).

5. A high-voltage sealing device for a transformer according to claim 3, characterized in that: A first rubber sealing ring (507) is fitted on the outside of the quick connector (5) and at the rear end of the movable sleeve (501), and a second rubber sealing ring (508) is fitted on the outside of the quick connector (5) and at the front end of the movable sleeve (501).

6. A high-voltage sealing device for a transformer according to claim 1, characterized in that: The clamping mechanism (9) includes a bidirectional threaded rod (901) rotatably connected to the top end inside the terminal rubber sleeve (4). An operating knob (902) is fixedly connected to one end of the bidirectional threaded rod (901) located outside the terminal rubber sleeve (4). Both ends of the bidirectional threaded rod (901) are threadedly connected to connecting sleeves (903). The connecting sleeves (903) are threadedly connected to the bidirectional threaded rod (901) through an internal threaded sleeve, and the threaded sleeves are rotatably connected to the connecting sleeves (903). A transmission rod (904) is rotatably connected to the outside of both sets of connecting sleeves (903). A clamping block (905) is rotatably connected between the two sets of transmission rods (904). A movable groove (906) is provided at the connection between the top end of the internal connecting terminal (3) and the clamping block (905).

7. A high-voltage sealing device for a transformer according to claim 6, characterized in that: A connecting block (907) is fixedly connected to the outside of the operating knob (902), and a locking knob (908) is threadedly connected inside the connecting block (907), and the locking knob (908) abuts against the outside of the terminal rubber sleeve (4).

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