An oil injection pressure relief structure and transformer monitoring device

Abstract

The present invention discloses an oil filling and pressure relief structure for a transformer monitoring device, comprising an upper cover, a bottom shell, an integrated circuit module, and a pressure relief valve; the upper cover is mounted on the bottom shell, an oil filling hole is provided on the upper cover, the pressure relief valve is detachably mounted on the oil filling hole, the integrated circuit module is disposed in the bottom shell, and an oil through hole is provided on the integrated circuit module; the integrated circuit module comprises at least one circuit board, and a plurality of the circuit boards are stacked in sequence. The present invention also discloses a transformer monitoring device, comprising a housing and the oil filling and pressure relief structure. With the present invention, the circuit module occupies a small space laterally, has the functions of pressure relief and oil filling, and oil filling is very convenient. During oil filling, the electronic plastic on the circuit module can be prevented from dissolving and the electronic components from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer monitoring devices, and in particular to an oil injection pressure relief structure and a transformer monitoring device. Background Art

[0002] Currently, with the rapid growth of power grids, the demand for transformer operating status monitoring is increasing. Traditional transformer monitoring relies on manual patrols day and night. To improve power quality, the operating status of transformers must be monitored in real time for early warning intervention. Existing transformers often need to be retrofitted and upgraded, with the addition of various temperature, pressure, and oil level status monitoring sensors. The data collected by these additional sensors needs to be analyzed and processed. To ensure data accuracy and avoid interference during transmission, an integrated circuit module with a built-in controller is required for calculation and processing. This increases the lateral space occupied by the integrated circuit module, which in turn increases the lateral space occupied by the transformer monitoring device, making it difficult to install on the transformer. Secondly, to prevent oil from directly flushing the integrated circuit module and causing the internal electronic plastic to dissolve, existing transformers generally need to be removed from the oil filling hole at the top of the transformer before oiling can be performed. This results in low oil filling efficiency and is very cumbersome to operate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an oil injection and pressure relief structure, which occupies a small lateral space of the circuit module and has the functions of pressure relief and oil injection. The oil injection is very convenient and can prevent the electronic plastic on the circuit module from dissolving and the electronic components from being damaged.

[0004] In order to solve the above technical problems, the present invention provides an oil injection and pressure relief structure for a transformer monitoring device, comprising an upper cover, a bottom shell, an integrated circuit module and a pressure relief valve; the upper cover is mounted on the bottom shell, an oil injection hole is provided on the upper cover, the pressure relief valve is detachably mounted on the oil injection hole, the integrated circuit module is disposed in the bottom shell and an oil passage hole is provided on the integrated circuit module; the integrated circuit module comprises at least one circuit board, and a plurality of the circuit boards are stacked in sequence.

[0005] As an improvement of the above-mentioned solution, the oil filling and pressure relief structure also includes an oil guide part, which is arranged in the bottom shell and located between the oil filling hole and the oil through hole; a diversion part and an oil guide hole are provided in the middle part of the oil guide part, and a plurality of the oil guide holes are evenly distributed circumferentially on the periphery of the diversion part.

[0006] As an improvement of the above solution, the oil guide member is a symmetrical cylindrical structure, the diverter portion is a cylindrical structure, and the oil guide hole is a fan-shaped through hole.

[0007] As an improvement to the above solution, the oil guide member is a symmetrical cylindrical structure, the diverter portion is a truncated cone structure, and the oil guide hole is a fan-shaped through hole; the side wall of the diverter portion is inclined in a direction away from the oil guide member.

[0008] As an improvement to the above solution, the ratio of the radius of the diverter portion to the radius of the oil guide member is 1 / 4 to 1 / 2.

[0009] As an improvement of the above solution, an annular notch is provided in the upper opening of the bottom shell, the diameter of the oil guide member is smaller than the diameter of the annular notch and larger than the inner diameter of the bottom shell, the inner diameter of the lower opening of the upper cover is larger than the diameter of the oil guide member, and the oil guide member is installed in the annular notch and clamped between the upper cover and the bottom shell.

[0010] As an improvement to the above solution, the integrated circuit module further includes a protective plate, which is arranged above the circuit board, and the shape of the protective plate is consistent with the shape of the circuit board.

[0011] As an improvement of the above solution, the oil injection and pressure relief structure further includes a first sealing ring, and a first groove is provided at the upper end of the bottom shell or the bottom end of the upper cover, and the first sealing ring is provided in the first groove.

[0012] As an improvement of the above solution, the oil filling and pressure relief structure further includes an aviation plug, and a wiring hole is provided on the outer side of the bottom shell, and the aviation plug is installed on the wiring hole.

[0013] As an improvement of the above solution, the oil filling and pressure relief structure further includes a second sealing ring. A second groove is provided on the aviation plug. The second sealing ring is arranged in the second groove and is located between the aviation plug and the wiring hole.

[0014] Correspondingly, the present invention also provides a transformer monitoring device, including a shell and the oil injection and pressure relief structure, the oil injection and pressure relief structure including a third sealing ring; the bottom shell is connected to the shell by threads, and a third groove is provided at the lower part of the bottom shell, and the third sealing ring is arranged in the third groove and is located between the bottom shell and the shell.

[0015] The beneficial effects of implementing the present invention are:

[0016] In the oil injection and pressure relief structure of the present invention, the pressure relief function can be achieved by adjusting the pressure relief valve. After the pressure relief valve is removed from the oil injection hole, oil can be injected through the oil injection hole, which is very convenient. Since the integrated circuit module is provided with an oil hole, the oil flow will not directly flush the integrated circuit module during oil injection, which can prevent the electronic plastic on the circuit module from dissolving; secondly, multiple circuit boards are stacked in sequence, and the horizontal space occupied is small. In addition, R&D personnel can place surface-mounted electronic components on the middle and upper circuit boards, and vertical electronic components on the bottom circuit board. Once the oil flow flushes the integrated circuit module, it can only impact the top circuit board, thereby preventing the vertical electronic components in the bottom circuit board from being damaged by the impact, resulting in the loss of part of the function of the integrated circuit module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an explosion diagram of the oil injection and pressure relief structure of the present invention;

[0018] Figure 2 It is a cross-sectional schematic diagram of the transformer monitoring device of the present invention. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear herein are based solely on the accompanying drawings and are not intended to limit the present invention.

[0020] like Figure 1 As shown, the present invention provides an oil injection and pressure relief structure for a transformer monitoring device, comprising an upper cover 1, a bottom shell 2, an integrated circuit module 3, and a pressure relief valve 4. The upper cover 1 is mounted on the bottom shell 2 and is provided with an oil injection hole 11. The pressure relief valve 4 is removably mounted on the oil injection hole 11. The integrated circuit module 3 is disposed within the bottom shell 2 and is provided with an oil passage hole 31. The integrated circuit module 3 includes at least one circuit board 32, with multiple circuit boards 32 stacked in sequence. In this embodiment, the integrated circuit module 3 preferably includes two layers of circuit boards 32. The upper cover 1 is preferably mounted on the bottom shell 2 using screws.

[0021] It should be noted that, in the oil injection and pressure relief structure of the present invention, the pressure relief function can be achieved by adjusting the pressure relief valve 4. After the pressure relief valve 4 is removed from the oil injection hole, oil can be injected through the oil injection hole, which is very convenient. Since the integrated circuit module 3 is provided with an oil hole 31, the oil flow will not directly flush the integrated circuit module 3 during oil injection, which can avoid the dissolution of the electronic plastic on the circuit module; secondly, the multiple circuit boards 32 are stacked in sequence, and the horizontal space occupied is small. In addition, the surface-mounted electronic components (such as resistors) are arranged on the middle and upper circuit boards, and the vertical electronic components (such as vertical capacitors) are arranged on the bottom circuit board. Once the oil flow flushes the integrated circuit module 3, it can only impact the top circuit board, thereby avoiding the vertical electronic components in the bottom circuit board from being damaged by the impact, resulting in the loss of part of the function of the integrated circuit module.

[0022] like Figure 1 As shown, the oil filling and pressure relief structure also includes an oil guide 5, which is arranged in the bottom shell 2 and located between the oil filling hole 11 and the oil passage hole 31. The middle part of the oil guide 5 is provided with a diverter 51 and oil guide holes 52, and multiple oil guide holes 52 are evenly distributed around the periphery of the diverter 51. Before filling the oil, the staff inserts a funnel into the oil filling hole 11, with the lower end of the funnel abutting against the diverter 51. During oil filling, a single coarse oil flow first flows through the lower end outlet of the funnel to the diverter 51, slowing down the falling speed of the oil flow. Then, the single coarse oil flow is divided into multiple fine oil flows through the diverter 51. Finally, the multiple fine oil flows are guided through the oil guide holes 52 to fall into the interior of the transformer, thereby preventing the single coarse oil flow from directly impacting downward at a high falling speed and causing damage to the oil level detection module in the corresponding transformer monitoring device.

[0023] As a first embodiment of the oil guide member 5, the oil guide member 5 is a symmetrical cylindrical structure, corresponding to the oil level gauge housing in the transformer monitoring device; the diverter portion 51 is a cylindrical structure with an arc-shaped edge, which can avoid splashing when the oil flow collides with the diverter portion 51 as much as possible, and the oil guide hole 52 is a fan-shaped through hole. In addition to being able to guide multiple thin oil flows downward, the oil guide hole 52 can also guide oil droplets that splash and converge on the edge of the oil guide member 5 downward to save oil resources.

[0024] Furthermore, the radius ratio of the diverter portion 51 to the oil guide member 5 is 1 / 4 to 1 / 2.

[0025] It should be noted that when the radius of the oil guide member 5 is fixed, the ratio of the radius of the diverter 51 to the radius of the oil guide member 5 is inversely proportional to the initial drop velocity of the thin oil stream, that is, inversely proportional to the final drop velocity of the thin oil stream. If the radius of the diverter 51 is too large, refueling efficiency will decrease, and the radius of the oil hole will increase, which will in turn reduce the horizontal area of ​​each layer of the circuit board and increase the difficulty of circuit design. If the radius of the diverter 51 is too small, the impact force on the oil level detection module will increase. Therefore, setting the ratio of the radius of the diverter 51 to the radius of the oil guide member 5 to 1 / 4 to 1 / 2 facilitates the design of the integrated circuit module 3, maximizes refueling efficiency, and avoids damage to the oil level detection module. In this embodiment, the ratio of the radius of the diverter 51 to the radius of the oil guide member 5 is 1 / 3 to 1 / 2, preferably 1 / 3, to achieve the best balance between circuit design difficulty, refueling efficiency, and the impact force on the oil level detection module.

[0026] As a second embodiment of the oil guide member 5, different from the first embodiment, the diverter portion 51 is a truncated cone structure, and the side wall of the diverter portion 51 is inclined in the direction away from the oil guide member 5. Compared with the first embodiment, the side wall of the diverter portion 51 can guide the diverted fine oil flow to the center and reduce the falling range of the fine oil flow, thereby avoiding the oil flow from falling on the circuit board 32 as much as possible.

[0027] In order to further prevent oil droplets from dripping onto the circuit board, the integrated circuit module 3 may further include a protective plate, which is arranged above the circuit board 32 and has a shape consistent with that of the circuit board 32 .

[0028] Combine Figures 1 and 2 As shown, in order to facilitate the disassembly and assembly of the oil guide member when repairing or replacing the integrated circuit module, an annular notch 21 is provided in the upper opening of the bottom shell 2, the diameter of the oil guide member 5 is smaller than the diameter of the annular notch 21 and larger than the inner diameter of the bottom shell 2, and the inner diameter of the lower opening of the upper cover 1 is larger than the diameter of the oil guide member 5, and the oil guide member 5 is installed in the annular notch 21 and is clamped between the upper cover 1 and the bottom shell 2.

[0029] Furthermore, the oil injection pressure relief structure includes a first sealing ring 6. A first groove 22 is provided at the upper end of the bottom shell 2 or the bottom end of the upper cover 1. The first sealing ring 6 is disposed in the first groove 22 to prevent gas leakage from causing the pressure inside the transformer to fail to meet regulations. It also prevents oil from overflowing from the connection between the bottom shell 2 and the upper cover 1 during oil injection. In this embodiment, the first sealing ring 6 is disposed at the upper end of the bottom shell 2.

[0030] like Figure 2As shown, the pressure relief valve 4 is connected to the oil filling hole 11 through threads to facilitate disassembly and assembly.

[0031] Combine Figure 1 and Figure 2 As shown, the oil filling and pressure relief structure also includes an aviation plug 7. The outer side surface of the bottom shell 2 is provided with a wiring hole 23. The aviation plug 7 is installed on the wiring hole 23. The integrated circuit module 3 is connected to an external display device or alarm device through the aviation plug 7 to output a monitoring signal. The aviation plug 7 has the advantages of easy use, easy maintenance, fast disassembly and assembly, and reliable contact.

[0032] Furthermore, the oil filling and pressure relief structure also includes a second sealing ring 8. A second groove 71 is provided on the aviation plug 7. The second sealing ring 8 is arranged in the second groove 71 and is located between the aviation plug 7 and the wiring hole 23, thereby preventing gas leakage from causing the air pressure in the transformer to fail to meet regulations, and at the same time preventing oil from overflowing from the wiring hole 23 during oil filling.

[0033] like Figure 2 As shown, accordingly, the present invention also provides a transformer monitoring device, including a shell 10 and the oil injection pressure relief structure, the oil injection pressure relief structure including a third sealing ring 9; the bottom shell 2 is connected to the shell 10 by threads, and the lower part of the bottom shell 2 is provided with a third groove 24, the third sealing ring 9 is arranged in the third groove 24 and is located between the bottom shell 2 and the shell 10, thereby preventing gas leakage from causing the air pressure in the transformer to fail to meet regulations, and at the same time preventing oil from overflowing from the connection between the bottom shell 2 and the shell 10 during oil injection.

[0034] Correspondingly, the transformer monitoring device also includes a monitoring mechanism, which includes an oil temperature detection module, an air pressure detection module and an oil level detection module. The integrated circuit module 3 includes an oil temperature signal processing module, an air pressure signal processing module and an oil level signal processing module; the oil temperature detection module is connected to the oil temperature signal processing module, the air pressure detection module is connected to the air pressure signal processing module, and the oil level detection module is connected to the oil level signal processing module. The oil level signal processing module, the air pressure signal processing module and the oil level signal processing module are respectively connected to an external display device and send corresponding data signals to facilitate the staff to understand the various states of the transformer and ensure the normal operation of the transformer.

[0035] In summary, by adopting the present invention, the circuit module occupies a small space laterally, has the functions of pressure relief and oil filling, and the oil filling is very convenient. During the oil filling, the electronic plastic on the circuit module can be prevented from dissolving and the electronic components can be prevented from being damaged.

[0036] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. An oil injection pressure relief structure used in a transformer monitoring device, characterized in that: It includes an upper cover, a bottom shell, an integrated circuit module and a pressure relief valve; The upper cover is mounted on the bottom shell, an oil filling hole is provided on the upper cover, the pressure release valve is detachably mounted on the oil filling hole, the integrated circuit module is arranged in the bottom shell and an oil hole is provided on the integrated circuit module; The integrated circuit module includes at least one circuit board, and a plurality of the circuit boards are stacked in sequence, with surface-mounted electronic components arranged on the middle and upper circuit boards and vertical electronic components arranged on the bottom circuit board; The oil filling and pressure relief structure further includes an oil guide member, which is arranged in the bottom shell and located between the oil filling hole and the oil passing hole; The oil guide member is provided with a diverter portion and oil guide holes in the middle thereof, and a plurality of the oil guide holes are evenly distributed around the periphery of the diverter portion. The oil guide member is a symmetrical cylindrical structure, the diverter portion is a truncated cone structure or a cylindrical structure, and the oil guide hole is a fan-shaped through hole; The side wall of the diverter portion is inclined in a direction away from the oil guide member; The integrated circuit module further includes a protection plate, which is arranged above the circuit board, and the shape of the protection plate is consistent with the shape of the circuit board.

2. The oil injection and pressure relief structure according to claim 1, characterized in that: The ratio of the radius of the diverter portion to the radius of the oil guide member is 1 / 4 to 1 / 2.

3. The oil injection and pressure relief structure according to claim 1, characterized in that: An annular notch is provided in the upper opening of the bottom shell, the diameter of the oil guide member is smaller than the diameter of the annular notch and larger than the inner diameter of the bottom shell, the inner diameter of the lower opening of the upper cover is larger than the diameter of the oil guide member, and the oil guide member is installed in the annular notch and clamped between the upper cover and the bottom shell.

4. The oil injection and pressure relief structure according to claim 1, characterized in that: It also includes a first sealing ring. A first groove is provided at the upper end of the bottom shell or the bottom end of the upper cover, and the first sealing ring is provided in the first groove.

5. The oil injection and pressure relief structure according to claim 1, characterized in that: It also includes an aviation plug, a wiring hole is provided on the outer side of the bottom shell, and the aviation plug is installed on the wiring hole. It also includes a second sealing ring, a second groove is provided on the aviation plug, and the second sealing ring is arranged in the second groove and is located between the aviation plug and the wiring hole.

6. A transformer monitoring device, characterized in that: It comprises a housing and the oil injection and pressure relief structure according to any one of claims 1 to 5, wherein the oil injection and pressure relief structure comprises a third sealing ring; The bottom shell is connected to the outer shell through threads. A third groove is provided at the lower part of the bottom shell. The third sealing ring is provided in the third groove and is located between the bottom shell and the outer shell.

Images