Dry-type transformer with high safety coefficient

Abstract

The utility model discloses a dry-type transformer with a high safety coefficient, which comprises a protection box, a dry-type transformer body is arranged at the bottom in the protection box, a heat dissipation fan is arranged on the dry-type transformer body, heat dissipation holes are arranged on two sides of the protection box, an opening and closing mechanism is arranged on an exhaust pipe, and the opening and closing mechanism is arranged on the protection box. According to the dry-type transformer with the high safety coefficient, a servo motor is started to rotate by 90 degrees, so that high-pressure carbon dioxide in a high-pressure carbon dioxide storage tank can enter the protection box through an exhaust pipe, and fire extinguishing in the protection box is completed; and meanwhile, a second sealing plate can move downwards to block heat dissipation holes, external air is prevented from entering the protection box, the fire extinguishing speed in the protection box is increased, the situation that due to the fact that the fire behavior of the dry-type transformer is too large, the loss of the dry-type transformer is too large is avoided, and meanwhile electric appliances beside the dry-type transformer are protected.

Description

Technical Field

[0001] The utility model relates to the technical field of dry-type transformers, in particular to a dry-type transformer with a high safety factor. Background Art

[0002] Dry-type transformers are transformers whose cores and windings are not immersed in insulating oil. Dry-type transformers are widely used in local lighting, high-rise buildings, airport and dock CNC machinery and equipment, etc. Dry-type transformers are installed inside protective boxes for use.

[0003] However, the existing dry-type transformers cannot quickly extinguish the fire when a fire occurs, which may cause the fire to occur and other electrical appliances in the factory to catch fire, causing heavy losses. In view of the above problems, it is urgent to carry out innovative designs based on the original dry-type transformers. Utility Model Content

[0004] The purpose of the utility model is to provide a dry-type transformer with a high safety factor to solve the problems raised by the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a dry-type transformer with a high safety factor, comprising a protection box, a dry-type transformer body is installed at the bottom of the protection box, a heat dissipation fan is installed on the dry-type transformer body, heat dissipation holes are opened on both sides of the protection box, a high-pressure carbon dioxide storage tank is installed on the top of the protection box, an exhaust pipe is arranged at the bottom of the high-pressure carbon dioxide storage tank, an opening and closing mechanism is arranged on the exhaust pipe, and an air blocking mechanism is arranged on one side of the heat dissipation hole;

[0006] The opening and closing mechanism includes a rotating shaft, which is installed through the inside of the exhaust pipe. The outer wall of the rotating shaft is connected to the inner side of the exhaust pipe through a sealing bearing. A first sealing plate is fixed to the outer wall of the rotating shaft located inside the exhaust pipe. Both ends of the rotating shaft are installed in the inside of the protective box through bearings. A servo motor is fixed to the end of the rotating shaft that passes through the side wall of the protective box. The outer wall of the servo motor is fixed to the outer wall of the protective box through a hood.

[0007] Preferably, the air blocking mechanism includes a cam, a cam is fixed to the outer wall of the rotating shaft, the bottom of the cam is in contact with a second sealing plate, the bottom of the second sealing plate is fixed with another second sealing plate through a fixing rod, one side of the second sealing plate is in contact with the inner side of the protective box, the second sealing plate is arranged close to the heat dissipation hole, a sliding rod is slidably installed inside the lowermost second sealing plate, a fixing block is fixed to the lower end of the sliding rod, one side of the fixing block is fixedly connected to the inner side of the protective box, a spring is nested at the lower end of the sliding rod, and the top and bottom of the spring are respectively connected to the bottom of the second sealing plate and the top of the fixing block.

[0008] Preferably, a guide block is fixed to the top of one side of the second sealing plate, and the end of the guide block is located inside the guide groove. The guide groove is opened on the inner side of the protective box. The guide groove and the guide block are designed as a "T"-shaped structure when viewed from above, and the guide block and the guide groove constitute a snap-fit ​​sliding structure.

[0009] Preferably, a smoke sensor is installed on the top of the protection box, and a controller is installed on the outside of the protection box. The controller is electrically connected to the smoke sensor and the servo motor.

[0010] Preferably, the side of the first sealing plate is designed to be arc-shaped, and the outer wall of the first sealing plate and the inner wall of the exhaust pipe are in contact with each other.

[0011] Preferably, there are two sliding rods symmetrically distributed about the central axis of the second sealing plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the dry-type transformer with a high safety factor is provided with a smoke sensor. When the smoke sensor senses smoke inside the protective box, the smoke sensor transmits a signal to the controller. The controller controls the servo motor to rotate ninety degrees. The servo motor drives the rotating shaft and the first sealing plate to rotate ninety degrees, so that the exhaust pipe is in an unblocked state, so that the high-pressure carbon dioxide inside the high-pressure carbon dioxide storage tank enters the interior of the protective box through the exhaust pipe, and completes the fire extinguishing inside the protective box. When the servo motor drives the first sealing plate to rotate ninety degrees, the second sealing plate moves downward to block the heat dissipation holes, thereby blocking the outside air from entering the interior of the protective box, speeding up the fire extinguishing inside the protective box, avoiding excessive losses of the dry-type transformer due to excessive fire, and at the same time protecting the electrical appliances next to the dry-type transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0014] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0015] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in the middle;

[0016] Figure 4 This is a schematic diagram of the installation structure of the second sealing plate of the utility model from a top view;

[0017] Figure 5 This is a schematic diagram of the installation structure of the cam in the utility model from a side view;

[0018] Figure 6 For this utility model Figure 3 The first sealing plate is a schematic diagram of the structure after being rotated 90 degrees from the side;

[0019] Figure 7 This is a schematic diagram of the control flow of the utility model.

[0020] In the figure: 1. protective box; 2. dry-type transformer body; 3. cooling fan; 4. cooling hole; 5. high-pressure carbon dioxide storage tank; 6. exhaust pipe; 7. rotating shaft; 8. first sealing plate; 9. servo motor; 10. cam; 11. second sealing plate; 12. fixing rod; 13. sliding rod; 14. spring; 15. fixing block; 16. guide groove; 17. guide block; 18. smoke sensor; 19. controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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] See also Figure 1-7 The utility model provides a technical solution: a dry-type transformer with a high safety factor, comprising a protection box 1, a dry-type transformer body 2 is installed at the bottom of the protection box 1, a heat dissipation fan 3 is installed on the dry-type transformer body 2, heat dissipation holes 4 are opened on both sides of the protection box 1, a high-pressure carbon dioxide storage tank 5 is installed on the top of the protection box 1, an exhaust pipe 6 is arranged at the bottom of the high-pressure carbon dioxide storage tank 5, an opening and closing mechanism is arranged on the exhaust pipe 6, and an air blocking mechanism is arranged on one side of the heat dissipation hole 4;

[0023] The opening and closing mechanism includes a rotating shaft 7, which is installed through the exhaust pipe 6. The outer wall of the rotating shaft 7 is connected to the inner side of the exhaust pipe 6 through a sealed bearing. The outer wall of the rotating shaft 7 is located inside the exhaust pipe 6 and a first sealing plate 8 is fixed thereto. Both ends of the rotating shaft 7 are installed inside the protective box 1 through bearings. The end of the rotating shaft 7 passes through the side wall of the protective box 1 and is fixed with a servo motor 9. The outer wall of the servo motor 9 is fixed to the outer wall of the protective box 1 through a hood.

[0024] The air blocking mechanism includes a cam 10, the cam 10 is fixed to the outer wall of the rotating shaft 7, the bottom of the cam 10 is in contact with a second sealing plate 11, the bottom of the second sealing plate 11 is fixed with another second sealing plate 11 through a fixing rod 12, one side of the second sealing plate 11 is in contact with the inner side of the protective box 1, the second sealing plate 11 is arranged close to the heat dissipation hole 4, a sliding rod 13 is slidably installed inside the lowermost second sealing plate 11, a fixing block 15 is fixed to the lower end of the sliding rod 13, one side of the fixing block 15 is fixedly connected to the inner side of the protective box 1, a spring 14 is nested at the lower end of the sliding rod 13, and the top and bottom of the spring 14 are respectively connected to the bottom of the second sealing plate 11 and the top of the fixing block 15.

[0025] A guide block 17 is fixed to the top of one side of the second sealing plate 11, and the end of the guide block 17 is located inside the guide groove 16. The guide groove 16 is opened on the inner side of the protection box 1, and the guide groove 16 and the guide block 17 are designed to be a "T"-shaped structure when viewed from above. The guide block 17 and the guide groove 16 form a snap-fitting sliding structure. Under the guidance of the guide block 17 and the guide groove 16, the second sealing plate 11 can move in a straight line along the vertical direction, which is beneficial for the second sealing plate 11 to block the heat dissipation hole 4, thereby preventing outside air from entering the protection box 1 through the heat dissipation hole 4, and facilitating fire extinguishing inside the protection box 1.

[0026] A smoke sensor 18 is installed on the top of the protective box 1, and a controller 19 is installed on the outside of the protective box 1. The controller 19 is electrically connected to the smoke sensor 18 and the servo motor 9. When the smoke sensor 18 senses smoke inside the protective box 1, the smoke sensor 18 can transmit a signal to the controller 19, and the controller 19 can control the servo motor 9 to start.

[0027] The side of the first sealing plate 8 is designed to be arc-shaped, and the outer wall of the first sealing plate 8 fits with the inner wall of the exhaust pipe 6, ensuring that the first sealing plate 8 can rotate inside the exhaust pipe 6 without getting stuck. The middle part of the first sealing plate 8 is made of stainless steel, and the outer side of the first sealing plate 8 is made of sealing rubber. The design of the sealing rubber ensures the sealing of the connection between the first sealing plate 8 and the exhaust pipe 6.

[0028] There are two slide bars 13 symmetrically distributed about the central axis of the second sealing plate 11 . The design of the two slide bars 13 is conducive to the stable up and down movement of the second sealing plate 11 .

[0029] The whole material of the second sealing plate 11 is stainless steel, and one side of the second sealing plate 11 close to the inner side of the protection box 1 is made of sealing rubber, which ensures the sealing of the connection between the second sealing plate 11 and the protection box 1 and ensures that the second sealing plate 11 can block the heat dissipation hole 4.

[0030] Working principle: When using the dry-type transformer with high safety factor, first start the servo motor 9 to drive the rotating shaft 7 and the first sealing plate 8 to rotate 90 degrees, so that the first sealing plate 8 becomes horizontal and blocks the exhaust pipe 6. The rotating shaft 7 also drives the cam 10 to rotate 90 degrees, so that the protruding end of the cam 10 is away from the second sealing plate 11. The elastic force generated by the spring 14 pushes the second sealing plate 11 and the fixing rod 12 to move upward, completing the separation of the second sealing plate 11 from the heat dissipation hole 4, so that the heat generated by the dry-type transformer body 2 can be discharged through the heat dissipation hole 4;

[0031] Then, the gas injection end valve on the high-pressure carbon dioxide storage tank 5 is opened, and high-pressure carbon dioxide is injected into the high-pressure carbon dioxide storage tank 5 through a special carbon dioxide filling device;

[0032] When a fire occurs inside the protective box 1, smoke will appear inside the protective box 1. The smoke sensor 18 senses the smoke inside the protective box 1, and the smoke sensor 18 transmits a signal to the controller 19. Then the controller 19 controls the servo motor 9 to rotate in the opposite direction by ninety degrees, so that the servo motor 9 drives the rotating shaft 7 and the first sealing plate 8 to rotate in the opposite direction by ninety degrees. The first sealing plate 8 becomes vertical, and the high-pressure carbon dioxide inside the high-pressure carbon dioxide storage tank 5 is sprayed into the interior of the protective box 1 through the exhaust pipe 6, completing the fire extinguishing inside the protective box 1. At the same time, the rotating shaft 7 drives the cam 10 to rotate in the opposite direction by ninety degrees. The protruding end of the cam 10 pushes the second sealing plate 11 and the fixing rod 12 to move downward, and the spring 14 is compressed by the second sealing plate 11. The second sealing plate 11 blocks the heat dissipation hole 4, preventing the outside air from entering the interior of the protective box 1 through the heat dissipation hole 4, which is further beneficial to the fire extinguishing inside the protective box 1.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry-type transformer with a high safety factor, comprising a protection box (1), a dry-type transformer body (2) is installed at the bottom of the protection box (1), a heat dissipation fan (3) is installed on the dry-type transformer body (2), and heat dissipation holes (4) are opened on both sides of the protection box (1), characterized in that: A high-pressure carbon dioxide storage tank (5) is installed on the top of the protection box (1), an exhaust pipe (6) is arranged at the bottom of the high-pressure carbon dioxide storage tank (5), an opening and closing mechanism is arranged on the exhaust pipe (6), and an air blocking mechanism is arranged on one side of the heat dissipation hole (4); The opening and closing mechanism comprises a rotating shaft (7), the rotating shaft (7) is installed through the inside of the exhaust pipe (6), the outer wall of the rotating shaft (7) is connected to the inner side of the exhaust pipe (6) through a sealing bearing, the outer wall of the rotating shaft (7) is located inside the exhaust pipe (6) and a first sealing plate (8) is fixed thereto, both ends of the rotating shaft (7) are installed inside the protective box (1) through bearings, the end of the rotating shaft (7) passes through the side wall of the protective box (1) and is fixed with a servo motor (9), and the outer wall of the servo motor (9) is fixed to the outer wall of the protective box (1) through a hood.

2. A dry-type transformer with high safety factor according to claim 1, characterized in that: The air blocking mechanism comprises a cam (10), the outer wall of the rotating shaft (7) is fixed with the cam (10), the bottom of the cam (10) is in contact with a second sealing plate (11), the bottom of the second sealing plate (11) is fixed with another second sealing plate (11) through a fixing rod (12), one side of the second sealing plate (11) is in contact with the inner side of the protective box (1), the second sealing plate (11) is arranged close to the heat dissipation hole (4), a sliding rod (13) is slidably installed inside the lowermost second sealing plate (11), a fixing block (15) is fixed at the lower end of the sliding rod (13), one side of the fixing block (15) is fixedly connected to the inner side of the protective box (1), a spring (14) is embedded at the lower end of the sliding rod (13), and the top and bottom of the spring (14) are respectively connected to the bottom of the second sealing plate (11) and the top of the fixing block (15).

3. A dry-type transformer with high safety factor according to claim 2, characterized in that: A guide block (17) is fixed to the top of one side of the second sealing plate (11), and the end of the guide block (17) is located inside the guide groove (16). The guide groove (16) is opened on the inner side of the protective box (1). The guide groove (16) and the guide block (17) are designed to be a "T"-shaped structure when viewed from above, and the guide block (17) and the guide groove (16) form a snap-fitting sliding structure.

4. A dry-type transformer with high safety factor according to claim 1, characterized in that: A smoke sensor (18) is installed on the top of the protection box (1), and a controller (19) is installed on the outside of the protection box (1). The controller (19) is electrically connected to the smoke sensor (18) and the servo motor (9).

5. A dry-type transformer with high safety factor according to claim 1, characterized in that: The side of the first sealing plate (8) is designed to be arc-shaped, and the outer wall of the first sealing plate (8) and the inner wall of the exhaust pipe (6) are in contact with each other.

6. A dry-type transformer with high safety factor according to claim 2, characterized in that: Two sliding rods (13) are symmetrically distributed about the central axis of the second sealing plate (11).

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