Transformer

Abstract

The utility model discloses a transformer which comprises a heat dissipation piece installed on a transformer box body. The heat dissipation piece comprises an upper pipeline and a lower pipeline, and a heat dissipation plate is arranged between the upper pipeline and the lower pipeline; a pressure relief assembly is further arranged between the upper pipeline and the lower pipeline. The pressure relief assembly comprises a first pipeline and a second pipeline, and a one-way valve is arranged between the first pipeline and the second pipeline; wherein the other end of the first pipeline is connected with a liquid outlet pipe arranged on the upper pipeline, the other end of the second pipeline is connected with a liquid inlet pipe arranged on the lower pipeline, and a mounting seat for mounting a sensor is arranged on the second pipeline. In the normal state, the one-way valve is closed, oil can flow to the lower pipeline through the cooling fins, when the oil pressure in the transformer abnormally rises, transformer oil jacks open the one-way valve, the transformer oil directly flows to the lower pipeline through the pressure relief assembly, and then the problems that the cooling fins are damaged due to the too high oil pressure and oil leakage occurs at welding points can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a transformer. Background Art

[0002] In an existing oil-immersed transformer, when the transformer is operating, the oil circulates along the heat sink to discharge the heat inside the transformer through the heat sink. However, in the heat sink of the existing transformer, such as the prior art with announcement number CN210110472U, the oil enters the heat sink through the upper header and then flows through the heat sink to the lower header. Although the oil can be cooled, the oil circulation path is single.

[0003] Due to the single oil circulation path, when the oil pressure inside the transformer is too high, for example, when the transformer is overloaded or short-circuited, the oil temperature rises, causing the oil pressure to rise. The single circulation path lacks an effective pressure relief channel, which will cause oil leakage at the connection between the thin heat sink and the two collecting pipes over time. Utility Model Content

[0004] The purpose of the present utility model is to provide a transformer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a transformer, comprising a heat sink installed on a transformer box; the heat sink comprises an upper pipe and a lower pipe, and a heat sink is provided between the upper pipe and the lower pipe, and a pressure relief assembly is also provided between the upper pipe and the lower pipe; the pressure relief assembly comprises a first pipe and a second pipe, and a one-way valve is provided between the first pipe and the second pipe; the other end of the first pipe is connected to a liquid outlet pipe provided on the upper pipe, and the other end of the second pipe is connected to a liquid inlet pipe provided on the lower pipe, and a mounting seat is provided on the second pipe, and a sensor is also provided on the mounting seat.

[0006] As an optimal technical solution of the present utility model: the one-way valve includes an upper shell connected to the first pipe, the upper shell is connected to the second pipe through a lower shell, and a valve flap and a spring for urging the valve flap to press against the upper shell are provided between the upper shell and the lower shell.

[0007] As a preferred technical solution of the present utility model: a through hole is provided on the valve flap, and the valve flap is inserted into the liquid inlet pipe of the upper shell through a provided latch.

[0008] As a preferred technical solution of the present invention: a sealing gasket is further sheathed on the outside of the latch.

[0009] As an optimal technical solution of the present invention: a connecting pipe is further provided on the upper pipeline, and a container is installed on the connecting pipe.

[0010] As a preferred technical solution of the present invention: an oil collecting plate is further provided on the circumferential surface of the lower pipe, and the oil collecting plate is located directly below the heat dissipation plate.

[0011] By adopting the above technical solution, the beneficial effects of the utility model are as follows: 1. Since the device is provided with a pressure relief component between the upper pipe and the lower pipe, the pressure relief component is used to directly drain the oil to the lower pipe, thereby reducing the oil flow of the heat sink, thereby reducing the oil leakage at the connection between the heat sink and the two pipes caused by excessive oil pressure;

[0012] 2. Since a sensor is also provided on the second pipeline, when the sensor detects that oil is passing through, the detection information can be sent to a control device communicating with it, such as an alarm, to remind the user that the oil pressure inside the transformer is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0015] Figure 3 This is an exploded schematic diagram of the main structure of the utility model;

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of the one-way valve of the utility model;

[0017] Figure 5 This is a schematic diagram of the exploded structure of the one-way valve of the utility model;

[0018] Figure 6 This is a schematic diagram of the bottom structure of the lower pipe of the utility model.

[0019] In the figure: 1. heat sink; 10. upper pipe; 11. lower pipe; 12. pressure relief assembly; 13. container; 14. heat sink; 15. oil collecting plate; 16. liquid inlet pipe; 17. second pipe; 18. first pipe; 19. one-way valve; 110. connecting pipe; 111. liquid outlet pipe; 112. upper shell; 113. lower shell; 114. spring; 115. valve disc; 116. sealing gasket; 117. mounting seat; 118. through hole; 119. latch; 120. sensor. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limitations on the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "upper surface", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present invention.

[0021] See also Figure 1-6 The utility model provides an embodiment: a transformer, comprising a heat sink 1 installed on a transformer box; the heat sink 1 comprises an upper pipe 10 and a lower pipe 11, and a heat sink 14 is provided between the upper pipe 10 and the lower pipe 11, and a pressure relief assembly 12 is further provided between the upper pipe 10 and the lower pipe 11; the pressure relief assembly 12 comprises a first pipe 18 and a second pipe 17, and a one-way valve 19 is provided between the first pipe 18 and the second pipe 17; the other end of the first pipe 18 is connected to a liquid outlet pipe 111 provided on the upper pipe 10, and the other end of the second pipe 17 is connected to a liquid inlet pipe 16 provided on the lower pipe 11, and a mounting seat 117 is provided on the second pipe 17, and a sensor 120 is also provided on the mounting seat 117.

[0022] To sum up, since the device is provided with a pressure relief component 12 between the upper pipe 10 and the lower pipe 11, the pressure relief component 12 is used to directly drain the oil to the lower pipe 11, thereby reducing the oil flow of the heat sink 14, and further reducing the oil leakage at the connection between the heat sink 14 and the two pipes due to excessive oil pressure; at the same time, since a sensor 120 is also provided on the second pipe 17, when the sensor 120 detects the passage of oil, it can send the detection information to the control device communicating with it, such as an alarm, to remind the user that the oil pressure inside the transformer is abnormal.

[0023] Specifically, the one-way valve 19 includes an upper housing 112 connected to the first pipe 18. The upper housing 112 is connected to the second pipe 17 via a lower housing 113. A valve flap 115 and a spring 114 for pressing the valve flap 115 against the interior of the upper housing 112 are provided between the upper and lower housings 112, 113. The spring 114 can thus be used to press the valve flap 115 against the interior of the upper housing 112. When the internal oil pressure exceeds the elastic force of the spring 114, the spring 114 is compressed, allowing oil to flow through the one-way valve into the lower pipe 11. When the oil pressure stabilizes, the spring 114 returns to its original position, preventing the oil from flowing through the one-way valve 19 into the lower pipe 11.

[0024] Furthermore, since the valve flap 115 is provided with a through hole 118, the through hole 118 can be used to guide the flow of oil. At the same time, the valve flap 115 is inserted into the liquid inlet pipe of the upper shell 112 through the provided pin 119. Therefore, the pin 119 can also be used to prevent oil leakage.

[0025] Furthermore, since a sealing gasket 116 is also mounted on the outside of the latch 119 , the sealing performance of the one-way valve 19 can be further improved.

[0026] On the basis of the above scheme, since the upper pipe 10 is further provided with a connecting pipe 110 and a container 13 is installed on the connecting pipe 110, when the oil pressure is too high, the oil can enter the container 13. Therefore, the container 13 can be used to contain the oil to further reduce the oil pressure. At the same time, the container 13 can also be used to discharge the heat in the oil to the outside.

[0027] Furthermore, since an oil collecting plate 15 is provided on the circumferential surface of the lower pipe 11, and the oil collecting plate 15 is located directly below the heat sink 14, when oil leakage occurs, the oil will flow from top to bottom onto the oil collecting plate 15. At the same time, the cross-section of the oil collecting plate 15 is triangular, so the oil can be further accumulated on the oil collecting plate 15, making it convenient for the user to determine whether the heat sink 1 is leaking by observing whether there is oil on the oil collecting plate 15.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A transformer, characterized in that: The invention comprises a heat sink (1) installed on a transformer box; the heat sink (1) comprises an upper pipe (10) and a lower pipe (11); a heat sink (14) is provided between the upper pipe (10) and the lower pipe (11); and a pressure relief assembly (12) is further provided between the upper pipe (10) and the lower pipe (11); The pressure relief assembly (12) comprises a first pipe (18) and a second pipe (17), wherein a one-way valve (19) is provided between the first pipe (18) and the second pipe (17); The other end of the first pipe (18) is connected to a liquid outlet pipe (111) provided on the upper pipe (10), and the other end of the second pipe (17) is connected to a liquid inlet pipe (16) provided on the lower pipe (11). A mounting seat (117) is provided on the second pipe (17), and a sensor (120) is also provided on the mounting seat (117).

2. A transformer according to claim 1, characterized in that: The one-way valve (19) comprises an upper shell (112) connected to the first pipe (18); the upper shell (112) is connected to the second pipe (17) via a lower shell (113); and a valve flap (115) and a spring (114) for pressing the valve flap (115) against the inside of the upper shell (112) are provided between the upper shell (112) and the lower shell (113).

3. A transformer according to claim 2, characterized in that: The valve flap (115) is provided with a through hole (118), and the valve flap (115) is inserted into the liquid inlet pipe of the upper shell (112) through a provided latch (119).

4. A transformer according to claim 3, characterized in that: The exterior of the latch (119) is also sheathed with a sealing gasket (116).

5. A transformer according to any one of claims 1 to 4, characterized in that: A connecting pipe (110) is also provided on the upper pipeline (10), and a container (13) is installed on the connecting pipe (110).

6. A transformer according to claim 5, characterized in that: An oil collecting plate (15) is also provided on the circumferential surface of the lower pipe (11), and the oil collecting plate (15) is located directly below the heat dissipation plate (14).

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