Device for calculating internal pressure of transformer bushing

Abstract

The utility model discloses a transformer bushing internal pressure calculating device, and belongs to the technical field of transformer bushing detection equipment. The internal pressure calculation device of the transformer bushing comprises a transformer bushing body; the outer surface of one side of the pressure measuring box is fixedly connected with a connecting outer threaded pipe, the connecting outer threaded pipe is communicated with the interior of the pressure measuring box, the connecting outer threaded pipe is in threaded connection with the interior of an oil tank opening of the transformer bushing body, and the inner wall of one side of the pressure measuring box is fixedly connected with a sealing pipe. When the probe is fed into the transformer bushing body, it is ensured that the interior of the transformer bushing body is always in a sealed state, the oil pressure in the transformer bushing body is calculated and measured under the condition that the transformer bushing body is kept sealed in the whole process, and the accuracy of oil pressure measurement data in the transformer bushing body is ensured; therefore, a worker can judge the operation state of the transformer more accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer bushing detection equipment, and more specifically to a transformer bushing internal pressure calculation device. Background Art

[0002] The transformer bushing is the main insulation device outside the transformer box. Its main function is to lead the high and low voltage leads inside the transformer to the outside of the oil tank, ensure the insulation between the lead wires and between the lead wires and the transformer casing, and fix the lead wires at the same time. The pressure inside the transformer bushing mainly comes from the oil pressure, but it is also related to the operation process of the transformer. During the operation of the transformer, the current passing through the transformer coil will generate a magnetic field, and energy conversion will occur in the coil and the iron core, eventually generating heat. This heat causes the temperature inside the transformer to rise, and the volume of the oil expands, forming a certain internal pressure.

[0003] During the operation of the transformer bushing, its sealing is crucial to maintaining the internal oil pressure stable. Once the sealing is damaged, it will not only cause the insulating oil to leak, affecting the insulation performance of the transformer, but also may introduce impurities and moisture, further damaging the safety of the transformer. Therefore, maintaining the full sealing of the transformer bushing body is a prerequisite for oil pressure measurement. Traditional oil pressure measurement methods often require the installation of additional measuring devices on the transformer bushing, which may damage the sealing of the bushing. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a transformer bushing internal pressure calculation device, which realizes the calculation and measurement of the oil pressure inside the transformer bushing body while keeping the transformer bushing body sealed throughout the whole process, thereby ensuring the accuracy of the oil pressure measurement data inside the transformer bushing body, so that the staff can more accurately judge the operating status of the transformer.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] A transformer bushing internal pressure calculation device, comprising:

[0009] Transformer bushing body;

[0010] A pressure measuring box, wherein an outer surface of one side of the pressure measuring box is fixedly connected with a connecting external threaded tube, the connecting external threaded tube is communicated with the interior of the pressure measuring box, the connecting external threaded tube is threadedly connected to the oil tank opening of the transformer bushing body, a sealing tube is fixedly connected to an inner wall of one side of the pressure measuring box, a top connection box is fixedly connected to the top of the connecting external threaded tube, a transmission threaded rod is rotatably connected between the inner walls on both sides of the top connection box, a transmission plate is threadedly connected to the transmission threaded rod, and the transmission plate slides through the upper inner wall of the pressure measuring box; and

[0011] An oil pressure measuring instrument, wherein an outer surface of one side of the oil pressure measuring instrument is electrically connected to a probe, and a fixed sleeve on the probe is provided with two sealing rings, one of which is slidably embedded in the interior of the connected external threaded pipe, and the other sealing ring is slidably embedded in the interior of the sealing pipe, and an outer surface of one side of the probe is fixedly connected to a fixed pipe, and the fixed pipe is fixedly connected to a transmission plate.

[0012] As a preferred solution of the utility model, a motor is fixedly mounted on an outer surface of one side of the top connection box, and an output end of the motor is fixedly connected to the transmission threaded rod.

[0013] As a preferred solution of the utility model, two limit rods are fixedly connected between the inner walls on both sides of the top connection box, and the transmission plate is slidably sleeved on the two limit rods.

[0014] As a preferred solution of the present utility model, the two limit rods are both made of stainless steel.

[0015] As a preferred solution of the utility model, the transmission threaded rod is located between two limiting rods.

[0016] As a preferred solution of the utility model, a placement frame is fixedly connected to an outer surface of one side of the pressure measuring box.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the utility model provides a transformer bushing internal pressure calculation device, which has the following beneficial effects:

[0019] The transformer bushing internal pressure calculation device, when the oil pressure inside the transformer bushing body is to be measured, controls the rotation of the transmission threaded rod so that the transmission plate drives the fixed tube to move in the direction close to the transformer bushing body, and the fixed tube sends the probe into the inside of the transformer bushing body. During this process, the sealing ring located inside the sealing tube will follow the probe to move to the inside of the connected external threaded tube, so that when the probe is sent into the inside of the transformer bushing body, it is ensured that the inside of the transformer bushing body is always in a sealed state, and the oil pressure inside the transformer bushing body is calculated and measured while keeping the transformer bushing body sealed throughout the whole process, thereby ensuring the accuracy of the oil pressure measurement data inside the transformer bushing body, so that the staff can more accurately judge the operating state of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is an exploded view of the utility model;

[0022] Figure 3 It is a partial structural sectional view of the utility model;

[0023] Figure 4 This is an internal cross-sectional view of the pressure measuring box of the present utility model.

[0024] Description of the numbers in the figure:

[0025] 1. Transformer bushing body; 2. Pressure measuring box; 3. Placement frame; 4. Oil pressure measuring instrument; 5. Top connection box; 6. Motor; 7. Connecting external threaded pipe; 8. Sealing pipe; 9. Probe; 10. Fixed pipe; 11. Transmission plate; 12. Transmission threaded rod; 13. Limit rod; 14. Sealing ring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings 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.

[0027] Example:

[0028] See also Figure 1-Figure 4 , a transformer bushing internal pressure calculation device, comprising:

[0029] Transformer bushing body 1;

[0030] A pressure measuring box 2, an outer surface of one side of the pressure measuring box 2 is fixedly connected with a connecting external threaded tube 7, the connecting external threaded tube 7 is connected to the inside of the pressure measuring box 2, the connecting external threaded tube 7 is threadedly connected to the oil tank opening of the transformer bushing body 1, a sealing tube 8 is fixedly connected to the inner wall of one side of the pressure measuring box 2, a top connection box 5 is fixedly connected to the top of the connecting external threaded tube 7, a transmission threaded rod 12 is rotatably connected between the inner walls on both sides of the top connection box 5, a transmission plate 11 is threadedly connected to the transmission threaded rod 12, and the transmission plate 11 slides through the upper inner wall of the pressure measuring box 2; and

[0031] An oil pressure measuring instrument 4 is electrically connected to a probe 9 on one side of the outer surface of the oil pressure measuring instrument 4. Two sealing rings 14 are fixedly sleeved on the probe 9. One sealing ring 14 is slidably embedded in the interior of the externally threaded tube 7, and the other sealing ring 14 is slidably embedded in the interior of the sealing tube 8. A fixed tube 10 is fixedly connected to the outer surface of one side of the probe 9, and the fixed tube 10 is fixedly connected to the transmission plate 11.

[0032] In a specific embodiment of the utility model, the oil pressure measuring instrument 4 is a common device on the market for measuring oil pressure through a probe. Its model and specification can be selected according to actual conditions. When the oil pressure inside the transformer bushing body 1 is not measured, the external threaded tube 7, the probe 9 and the sealing ring 14 connected to the internal of the external threaded tube 7 are connected to seal the oil tank opening of the transformer bushing body 1 to ensure that the inside of the transformer bushing body 1 remains sealed. A part of the wire connected between the oil pressure measuring instrument 4 and the probe 9 is located inside the fixed tube 10. When the oil pressure inside the transformer bushing body 1 is to be measured, the transmission threaded rod 12 is controlled to rotate so that the transmission plate 11 drives the fixed tube 10 to rotate. The fixed tube 10 moves toward the direction approaching the transformer bushing body 1, and the fixed tube 10 sends the probe 9 into the interior of the transformer bushing body 1. During this process, the sealing ring 14 located inside the sealing tube 8 will follow the probe 9 to move to the interior of the connected external threaded tube 7, so as to ensure that the interior of the transformer bushing body 1 is always in a sealed state while the probe 9 is sent into the interior of the transformer bushing body 1. This achieves the calculation and measurement of the oil pressure inside the transformer bushing body 1 while keeping the transformer bushing body 1 sealed throughout the whole process, thereby ensuring the accuracy of the oil pressure measurement data inside the transformer bushing body 1, so that the staff can more accurately judge the operating status of the transformer.

[0033] Specifically, a motor 6 is fixedly mounted on an outer surface of one side of the top connection box 5 , and an output end of the motor 6 is fixedly connected to the transmission threaded rod 12 .

[0034] In this embodiment, the transmission threaded rod 12 can be driven to rotate by controlling the motor 6 to start.

[0035] Specifically, two limit rods 13 are fixedly connected between the inner walls on both sides of the top connection box 5 , and the transmission plate 11 is slidably sleeved on the two limit rods 13 .

[0036] In this embodiment, the two limiting rods 13 ensure that the transmission plate 11 can maintain stable movement.

[0037] Specifically, the two limiting rods 13 are both made of stainless steel.

[0038] In this embodiment, the limiting rod 13 is made of stainless steel, which is more durable and has a smoother surface.

[0039] Specifically, the transmission threaded rod 12 is located between the two limiting rods 13 .

[0040] In this embodiment, the two limiting rods 13 will not hinder the transmission threaded rod 12 from rotating.

[0041] Specifically, a placement frame 3 is fixedly connected to an outer surface of one side of the pressure measuring box 2 .

[0042] In this embodiment, the placement frame 3 is used to place the oil pressure measuring instrument 4.

[0043] Working principle: When the oil pressure inside the transformer bushing body 1 is to be measured, the control motor 6 is started to drive the transmission threaded rod 12 to rotate, so that the transmission plate 11 drives the fixed tube 10 to move in the direction close to the transformer bushing body 1, and the fixed tube 10 sends the probe 9 into the inside of the transformer bushing body 1. During this process, the sealing ring 14 located inside the sealing tube 8 will follow the probe 9 to move to the inside of the connected external threaded tube 7, so that when the probe 9 is sent into the inside of the transformer bushing body 1, it is ensured that the inside of the transformer bushing body 1 is always in a sealed state, and the oil pressure inside the transformer bushing body 1 is calculated and measured while keeping the transformer bushing body 1 sealed throughout the whole process, ensuring the accuracy of the oil pressure measurement data inside the transformer bushing body 1, so that the staff can more accurately judge the operating status of the transformer. The control method of the utility model is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply belong to the common knowledge in the field, and the utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and wiring arrangement in detail.

[0044] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A transformer bushing internal pressure calculation device, characterized in that: include: Transformer bushing body (1); A pressure measuring box (2), wherein a connecting external threaded tube (7) is fixedly connected to an outer surface of one side of the pressure measuring box (2), the connecting external threaded tube (7) is in communication with the interior of the pressure measuring box (2), the connecting external threaded tube (7) is threadedly connected to an oil tank opening of a transformer bushing body (1), a sealing tube (8) is fixedly connected to an inner wall of one side of the pressure measuring box (2), a top connection box (5) is fixedly connected to the top of the connecting external threaded tube (7), a transmission threaded rod (12) is rotatably connected between inner walls on both sides of the top connection box (5), a transmission plate (11) is threadedly connected to the transmission threaded rod (12), and the transmission plate (11) slides through the upper inner wall of the pressure measuring box (2); and An oil pressure measuring instrument (4) is provided, wherein the outer surface of one side of the oil pressure measuring instrument (4) is electrically connected to a probe (9), and two sealing rings (14) are fixedly sleeved on the probe (9), wherein one of the sealing rings (14) is slidably embedded in the interior of a connected externally threaded tube (7), and the other of the sealing rings (14) is slidably embedded in the interior of a sealing tube (8), and the outer surface of one side of the probe (9) is fixedly connected to a fixed tube (10), and the fixed tube (10) is fixedly connected to a transmission plate (11).

2. A transformer bushing internal pressure calculation device according to claim 1, characterized in that: A motor (6) is fixedly mounted on an outer surface of one side of the top connection box (5), and an output end of the motor (6) is fixedly connected to a transmission threaded rod (12).

3. A transformer bushing internal pressure calculation device according to claim 1, characterized in that: Two limiting rods (13) are fixedly connected between the inner walls on both sides of the top connection box (5), and the transmission plate (11) is slidably sleeved on the two limiting rods (13).

4. A transformer bushing internal pressure calculation device according to claim 3, characterized in that: The two limiting rods (13) are both made of stainless steel.

5. A transformer bushing internal pressure calculation device according to claim 3, characterized in that: The transmission threaded rod (12) is located between the two limiting rods (13).

6. A transformer bushing internal pressure calculation device according to claim 1, characterized in that: A placement frame (3) is fixedly connected to an outer surface of one side of the pressure measuring box (2).

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