Oil-immersed transformer with leakage alarm function

Abstract

The utility model belongs to the technical field of oil-immersed transformers, and particularly relates to an oil-immersed transformer with a leakage alarm function, which comprises a transformer main body, the top of the transformer main body is fixedly connected with a mounting nozzle, the mounting nozzle extends into the transformer main body, and the inner side of the mounting nozzle is connected with a hollow shell through threads. The top of the hollow shell is fixedly connected with a connecting base, the connecting base makes contact with the mounting nozzle, an alarm is arranged on the top of the connecting base, and a mounting locking mechanism is arranged on the top of the transformer body and located on the outer side of the mounting nozzle. When oil pressure is too low due to leakage in the transformer body, the piston can be pushed downwards under the action of the spring, the sliding block on the same sliding rod as the piston moves downwards synchronously and abuts against the contact switch, the alarm starts to give an alarm immediately, and workers can handle the situation in time conveniently.

Description

Technical Field

[0001] The utility model relates to the field of oil-immersed transformers, in particular to an oil-immersed transformer with a leakage alarm function. Background Art

[0002] Oil-immersed transformer is a common power transformer. Its main feature is that it requires the use of insulating oil (usually mineral oil or silicone oil) for cooling and insulation during operation. The main components of the oil-immersed transformer include iron core, winding, oil tank, insulating oil and other parts.

[0003] Patent publication number CN113936892A discloses an oil-immersed transformer comprising an oil tank, a winding fixedly disposed within the oil tank, a high-voltage terminal fixedly disposed outside the oil tank, a low-voltage terminal fixedly disposed outside the oil tank, and a heat sink fixedly disposed outside the oil tank. The interior of the oil tank is a sealed main oil chamber, and a C-shaped circulation pipe is fixedly disposed outside the oil tank. The upper end of the circulation pipe communicates with the upper portion of the main oil chamber, and the lower end of the circulation pipe communicates with the lower portion of the main oil chamber. The oil tank is also provided with a compensation device for compensating for volume changes in the transformer oil within the main oil chamber due to thermal expansion and contraction. Circulation and convection occur within the main oil chamber and the circulation pipe, and the oil is cooled by the circulation pipe and fins, thereby generating convection in the transformer oil within the main oil chamber and improving the heat dissipation effect of the transformer.

[0004] Existing oil-immersed transformers need to store hydraulic oil, which needs to be kept at a relatively stable pressure. However, once a leak occurs in an existing oil-immersed transformer, it is difficult to detect it in time, which in turn affects the normal operation of the transformer. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of the utility model is to provide an oil-immersed transformer with a leakage alarm function, which solves the problem that once a leakage occurs in the existing oil-immersed transformer, it is difficult to detect it in time, thereby affecting the normal operation of the transformer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil-immersed transformer with a leakage alarm function, comprising a transformer main body, the top of the transformer main body is fixedly connected with a mounting nozzle, and the mounting nozzle extends into the transformer main body, the inner side of the mounting nozzle is connected with a hollow shell by a thread, the top of the hollow shell is fixedly connected with a connecting seat, the connecting seat contacts the mounting nozzle, the top of the connecting seat is provided with an alarm, the top of the transformer main body and the outer side of the mounting nozzle are provided with an installation locking mechanism, the inner bottom of the hollow shell is provided with a contact switch, and the contact switch is electrically connected to the alarm, the inner side of the hollow shell is slidably connected with a slider, the bottom of the slider is fixedly connected with two sliding rods, the bottoms of the two sliding rods are commonly fixedly connected with a piston, and the piston is slidably connected to the inner side of the mounting nozzle, the sliding rod passes through the hollow shell and is slidably connected to the hollow shell, and a spring is provided on the inner side of the hollow shell.

[0007] Preferably, a sealing ring is embedded in the top of the installation nozzle, and the sealing ring contacts the connecting seat. By setting the sealing ring, the sealing performance between the connecting seat and the installation nozzle can be increased.

[0008] Preferably, one end of the spring 1 is fixedly connected to the slider, and the other end of the spring 1 is fixedly connected to the inner surface of the hollow shell. Through the arrangement of the spring 1, the reaction force can be applied to the slider.

[0009] Preferably, a ball bearing is provided on the side of the slider, and the ball bearing contacts the inner surface of the hollow shell. By providing the ball bearing, the relative friction between the slider and the hollow shell can be reduced.

[0010] Preferably, the installation locking mechanism includes a mounting sleeve fixedly connected to the top of the transformer body, the mounting sleeve in contact with the connection seat, a locking pin slidably connected to the inner side of the mounting sleeve, the locking pin plugging into the connection seat, and a second spring provided on the inner side of the mounting sleeve, one end of the second spring fixedly connected to the locking pin, and the other end of the second spring fixedly connected to the inner surface of the mounting sleeve. The provision of the installation locking mechanism prevents loosening of components such as the alarm during installation.

[0011] Preferably, the middle section of the locking pin is fixedly connected to a lever, the end of the lever is fixedly connected to a blocking plate, the outer side of the lever body is slidably sleeved with a limit plate, the limit plate contacts the mounting sleeve, and the side of the limit plate close to the mounting sleeve is fixedly connected to a locking bead, which engages the mounting sleeve. The arrangement of the limit plate and the locking bead provides a positioning and locking function for the lever and the locking pin.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The utility model provides a mounting nozzle on the top of the transformer body, which is communicated with the interior of the transformer body, and then installs a connecting seat on the mounting nozzle by a threaded mounting method. An alarm is provided on the top of the connecting seat, and a hollow shell is provided at the bottom of the connecting seat. A contact switch and a piston elastically supported by a spring are provided in the hollow shell. When the oil pressure in the transformer body is too low due to leakage, the piston will be pushed downward by the action of the spring, and the slider on the same slide rod as the piston will also move downward synchronously and contact the contact switch, and then the alarm will be activated, which is convenient for the staff to deal with it in time.

[0014] 2. The utility model sets an installation locking mechanism on the top of the transformer body and on the outside of the installation mouth. The elastic force of the spring is used to insert the locking pin from the bottom to the bottom of the connecting seat, so that the connecting seat can be locked and fixed, thereby ensuring the stability of the installation of components such as the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 For the utility model Figure 1 Front cross-sectional view of

[0017] Figure 3 For the utility model Figure 2 A magnified view of the structure of part A;

[0018] Figure 4 For the utility model Figure 3 A three-dimensional diagram of the local structure.

[0019] In the figure: 1. Transformer body; 2. Mounting nozzle; 3. Hollow shell; 4. Connecting seat; 5. Alarm; 6. Sealing ring; 7. Install locking mechanism; 8. Contact switch; 9. Slider; 10. Sliding rod; 11. Piston; 12. Ball; 13. Spring 1; 71. Mounting sleeve; 72. Locking pin; 73. Spring 2; 74. Driving rod; 75. Blocking piece; 76. Limiting piece; 77. Card bead. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4An oil-immersed transformer with a leakage alarm function includes a transformer body 1. A mounting nozzle 2 is fixedly connected to the top of the transformer body 1 and extends into the transformer body 1. A hollow shell 3 is threadedly connected to the inside of the mounting nozzle 2. A connecting base 4 is fixedly connected to the top of the hollow shell 3 and contacts the mounting nozzle 2. An alarm 5 is provided on the top of the connecting base 4. A sealing ring 6 is embedded in the top of the mounting nozzle 2 and contacts the connecting base 4. The provision of the sealing ring 6 can improve the sealing between the connecting base 4 and the mounting nozzle 2.

[0022] See also Figure 4 A contact switch 8 is provided at the bottom inner side of the hollow shell 3, and the contact switch 8 is electrically connected to the alarm 5. A slider 9 is slidably connected to the inner side of the hollow shell 3. Two slide rods 10 are fixedly connected to the bottom of the slider 9. The bottoms of the two slide rods 10 are fixedly connected to a piston 11, and the piston 11 is slidably connected to the inner side of the mounting nozzle 2. The slide rods 10 pass through the hollow shell 3 and are slidably connected to the hollow shell 3. A spring 13 is provided inside the hollow shell 3. One end of the spring 13 is fixedly connected to the slider 9, and the other end of the spring 13 is fixedly connected to the inner surface of the hollow shell 3. The provision of the spring 13 can apply a reaction force to the slider 9. A ball 12 is provided on the side of the slider 9, and the ball 12 contacts the inner surface of the hollow shell 3. The provision of the ball 12 can reduce the relative friction between the slider 9 and the hollow shell 3.

[0023] See also Figure 4 A mounting locking mechanism 7 is provided at the top of the transformer body 1 and outside the mounting mouth 2. This prevents the alarm 5 and other components from becoming loose. The mounting locking mechanism 7 includes a mounting sleeve 71 fixedly connected to the top of the transformer body 1. The mounting sleeve 71 contacts the connecting seat 4. A locking pin 72 is slidably connected to the inner side of the mounting sleeve 71. The locking pin 72 is plugged into the connecting seat 4. A second spring 73 is provided inside the mounting sleeve 71. One end of the second spring 73 is fixedly connected to the locking pin 72, and the other end of the second spring 73 is fixedly connected to the inner surface of the mounting sleeve 71. A lever 74 is fixedly connected to the middle section of the locking pin 72. A stopper 75 is fixedly connected to the end of the lever 74. A limit plate 76 is slidably connected to the outer side of the lever 74. The limit plate 76 contacts the mounting sleeve 71. A locking bead 77 is fixedly connected to the side of the limit plate 76 near the mounting sleeve 71, and the locking bead 77 is locked to the mounting sleeve 71. The arrangement of the limiting piece 76 and the locking bead 77 has the function of positioning and locking the shift lever 74 and the locking pin 72 .

[0024] Then, the locking pin 72 is reset under the action of the spring 2 and the locking pin 72 is inserted into the connecting seat 4, thereby ensuring the stability of the installation of the connecting seat 4 and the alarm 5. At this time, the piston 11 is pushed up under the action of the oil pressure in the transformer body 1 and pushes the slider 9 through the slide rod 10. At this time, the spring 13 is in a compressed state. When the oil pressure in the transformer body 1 is too low due to leakage, the piston 11 is pushed downward under the action of the spring 13, and the slider 9 on the same slide rod 10 as the piston 11 also moves downward synchronously and contacts the contact switch 8, and then the alarm 5 is activated to facilitate timely handling by the staff.

[0025] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-immersed transformer with a leakage alarm function, comprising a transformer body (1), characterized in that: The top of the transformer body (1) is fixedly connected to a mounting nozzle (2), and the mounting nozzle (2) extends into the transformer body (1); the inner side of the mounting nozzle (2) is connected to a hollow shell (3) via a thread; the top of the hollow shell (3) is fixedly connected to a connecting seat (4); the connecting seat (4) is in contact with the mounting nozzle (2); an alarm (5) is provided on the top of the connecting seat (4); a mounting locking mechanism (7) is provided on the top of the transformer body (1) and outside the mounting nozzle (2); the inner side of the hollow shell (3) is fixedly connected to a connecting seat (4); the connecting seat (4) is in contact with the mounting nozzle (2); an alarm (5) is provided on the top of the connecting seat (4); a mounting locking mechanism (7) is provided on the top of the transformer body (1) and outside the mounting nozzle (2); A contact switch (8) is provided at the bottom of the side, and the contact switch (8) is electrically connected to the alarm (5); a slider (9) is slidably connected to the inner side of the hollow shell (3); two slide rods (10) are fixedly connected to the bottom of the slider (9); a piston (11) is fixedly connected to the bottom of the two slide rods (10), and the piston (11) is slidably connected to the inner side of the mounting nozzle (2); the slide rod (10) passes through the hollow shell (3) and is slidably connected to the hollow shell (3); a spring (13) is provided on the inner side of the hollow shell (3).

2. The oil-immersed transformer with leakage alarm function according to claim 1, characterized in that: A sealing ring (6) is embedded in the top of the installation nozzle (2), and the sealing ring (6) is in contact with the connecting seat (4).

3. The oil-immersed transformer with leakage alarm function according to claim 1, characterized in that: One end of the spring (13) is fixedly connected to the slider (9), and the other end of the spring (13) is fixedly connected to the inner surface of the hollow shell (3).

4. The oil-immersed transformer with a leakage alarm function according to claim 1, characterized in that: A ball (12) is provided on the side of the slider (9), and the ball (12) contacts the inner surface of the hollow shell (3).

5. The oil-immersed transformer with leakage alarm function according to claim 1, characterized in that: The mounting locking mechanism (7) comprises a mounting sleeve (71) fixedly connected to the top of the transformer body (1), the mounting sleeve (71) contacts the connecting seat (4), a locking pin (72) is slidably connected to the inner side of the mounting sleeve (71), the locking pin (72) is plugged into the connecting seat (4), a second spring (73) is provided on the inner side of the mounting sleeve (71), one end of the second spring (73) is fixedly connected to the locking pin (72), and the other end of the second spring (73) is fixedly connected to the inner surface of the mounting sleeve (71).

6. The oil-immersed transformer with leakage alarm function according to claim 5, characterized in that: The middle section of the locking pin (72) is fixedly connected to a shifting rod (74), the end of the shifting rod (74) is fixedly connected to a blocking piece (75), the outer side of the rod body of the shifting rod (74) is slidably sleeved with a limiting piece (76), and the limiting piece (76) contacts the mounting sleeve (71), and a clamping bead (77) is fixedly connected to the side of the limiting piece (76) close to the mounting sleeve (71), and the clamping bead (77) is clamped with the mounting sleeve (71).

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