Main transformer oil conservator oil level monitoring device

Abstract

The utility model belongs to the field of power transformers, and particularly relates to a main transformer oil conservator oil level monitoring device which comprises a testing pipeline, the upper end and the lower end of the testing pipeline are fixedly connected with a DN25 air hole flange and a DN25 flange respectively, the top of the DN25 air hole flange is fixedly connected with a communicating pipeline, the top of the communicating pipeline is fixedly connected with a corrugated expander, and the corrugated expander is fixedly connected with an oil tank. An exhaust hole is formed in the side surface of the DN air hole flange; the precision of a dual-pressure electronic liquid level meter commonly used in the market at present is + / -15% (f.s), the actual measurement effect of the device is + / -10% (f.s), the measurement precision of the dual-pressure liquid level meter is effectively improved, the upper rotating rod and the lower rotating rod at the upper end and the lower end of the box body are rotated by 90 degrees towards any side, then the front cover is detached in a sliding mode, and the dual-pressure electronic liquid level meter can be assembled and disassembled. The device is convenient to overhaul, and the working efficiency of a user is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power transformer, concretely is a main transformer oil pillow oil level monitoring device. BACKGROUND

[0002] Oil pillow is an important oil storage device widely used in power transformer. Oil pillow can isolate direct contact between insulating oil and air, prevent insulating oil from being damp, and slow down the deterioration speed of insulating oil. Therefore, the good running state of oil pillow is crucial to the safe and stable operation of transformer. According to the operation experience, the false oil level and other problems caused by oil level meter failure bring uncertain factors to the safe operation of transformer.

[0003] The corrugated expander is part of the oil pillow, the oil pillow is part of the power transformer, and the corrugated expander is part of the power transformer.

[0004] At present, there is a double-pressure electronic liquid level meter on the market, which includes a test pipeline and two pressure transmitters. The pressure sensors are arranged in an upper and lower interval. The oil level height is calculated by theoretical calculation using the liquid pressure formula. The technical scheme can be directly used to measure the height of the oil level, and can also be used to verify whether the oil level meter is damaged;

[0005] At present, the double-pressure sensor liquid level meter has a large error of about ± 15% when measuring the liquid level of the corrugated oil pillow due to the particularity of the structure of the corrugated oil pillow. The calculation method is only suitable for the case where there is no other pressure state above the oil surface. The corrugated expander of the corrugated oil pillow exerts a vertical downward pressure on the transformer oil surface due to the stretching of the corrugated expander when there is more transformer oil. The pressure of pressure transmitter one is the resultant force of the transformer oil pressure and the corrugated expander pressure, and the pressure of pressure transmitter two is also the same. The calculated transformer oil height is higher than the actual height of the transformer oil.

[0006] By replacing the corrugated expander of the corrugated oil pillow, the measurement accuracy of the device is improved. The accuracy of the commonly used double-pressure electronic liquid level meter on the market is ± 15% (f.s), and the actual measurement effect of the device is ± 10% (f.s). The measurement accuracy of the double-pressure liquid level meter is effectively improved. The structure of the upper and lower rotating rods facilitates the maintenance of the device.

[0007] Therefore, a main transformer oil pillow oil level monitoring device is proposed to solve the above problems. Utility model content

[0008] In order to make up for the problems in the prior art, the utility model provides a main transformer oil pillow oil level monitoring device.

[0009] The utility model discloses a technical scheme that solves its technical problem is adopted: the utility model discloses a kind of main transformer oil pillow oil level monitoring device, including test pipeline, the upper and lower ends of test pipeline are respectively fixedly connected with DN25 air hole flange and DN25 flange, the top of DN25 air hole flange is fixedly connected with intercommunication pipeline, the top of intercommunication pipeline is fixedly connected with bellows expander, the side of DN air hole flange is equipped with exhaust hole, the side of test pipeline is fixedly connected with pressure transmitter one and pressure transmitter two, the surface of test pipeline is hinged and installed with box, the inboard of box is hinged and installed with front cover, the inside of front cover is fixedly embedded with man-machine control module, the upper and lower sides of box are fixedly connected with base, the surface of test pipeline is hinged and installed with top cover and bottom box.

[0010] Preferably, the front side of one of the bases is rotatably connected to an upper turning rod, and the inside of the upper turning rod is attached to the surface of the front cover.

[0011] Preferably, the front side of the other of the bases is rotatably connected to a lower turning rod, and the lower turning rod is close to one-third of the lower turning rod at the axis of the base.

[0012] Preferably, the top view of the box is in the shape of a concave character, and the size of the front cover matches the size of the box.

[0013] Preferably, the upper and lower ends of the front cover are tightly attached to the inside of the base.

[0014] Preferably, the bottom of the DN flange is fixedly connected to a mounting pipe, and the side of the mounting pipe is rotatably connected to an oil discharge valve.

[0015] Preferably, grooves are formed on both sides of the top cover and the bottom box, a through groove is formed on the top of the top cover near the center point, clamping columns are fixedly connected to the top of the bottom box near the four corners, the bottom of the top cover is hingedly connected to the surface of the clamping columns, and single-molecule silica gel is filled in the inside of the top cover and the bottom box.

[0016] The utility model has the advantages that:

[0017] 1. The utility model improves the measurement accuracy of the device. The accuracy of the commonly used double-pressure electronic liquid level meter on the market is ±15% (f.s), and the actual measurement effect of the device is ±10% (f.s), effectively improving the measurement accuracy of the double-pressure liquid level meter.

[0018] 2. The utility model rotates the upper turning rod and the lower turning rod at the upper and lower ends of the box, and the upper turning rod and the lower turning rod are rotated by 90 degrees to any side, and then the front cover is slidably detached, which is convenient for the maintenance of the device and improves the work efficiency of the user. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a front view structural schematic diagram of the present application.

[0021] Figure 2 It is a test pipeline structural schematic diagram of the present application.

[0022] Figure 3 It is an installation pipe structural schematic diagram of the present application.

[0023] Figure 4 It is a box structure schematic diagram of the present application.

[0024] Figure 5 It is a top cover structure schematic diagram of the present application.

[0025] In the figure: 1, corrugated expander; 2, communication pipeline; 3, DN25 air hole flange; 4, test pipeline; 5, DN25 flange; 6, exhaust hole; 7, pressure transmitter one; 8, pressure transmitter two; 9, installation pipe; 10, oil drain valve; 11, box; 12, front cover; 13, man-machine control module; 14, base; 15, upper rotating rod; 16, lower rotating rod; 17, top cover; 18, bottom box; 19, clamping column; 20, groove; 21, through slot. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] Please refer to Figures 1-4As shown, a kind of main oil pad oil level monitoring device, including test pipeline 4, the upper and lower ends of test pipeline 4 are fixedly connected with DN25 air hole flange 3 and DN25 flange 5 respectively, the top of DN25 air hole flange 3 is fixedly connected with intercommunication pipeline 2, the top of intercommunication pipeline 2 is fixedly connected with bellows expander 1, the side of DN25 air hole flange 3 is provided with exhaust hole 6, the side of test pipeline 4 is fixedly connected with pressure transmitter one 7 and pressure transmitter two 8, the surface of test pipeline 4 is clamped with box 11, the inner side of box 11 is clamped with front cover 12, the inside of front cover 12 is fixedly embedded with man-machine control module 13, the upper and lower sides of box 11 are fixedly connected with base 14, the surface of test pipeline 4 is clamped with top cover 17 and bottom box 18;

[0028] Further, the front side of one base 14 is rotatably connected with upper rotating rod 15, the inner side of upper rotating rod 15 is attached to the surface of front cover 12;

[0029] When working, the inner side of upper rotating rod 15 is attached to the surface of front cover 12 by the structural design, so that upper rotating rod 15 has the limiting clamping effect on front cover 12.

[0030] Further, the front side of another base 14 is rotatably connected with lower rotating rod 16, and the third of one end of lower rotating rod 16 is close to the axis of base 14;

[0031] When working, the third of one end of lower rotating rod 16 is close to the axis of base 14 by the structural design, when the two-thirds of lower rotating rod 16 is subjected to gravity sag, the other end of lower rotating rod 16 is automatically attached to the surface of front cover 12.

[0032] Further, the plan view of box 11 is concave, and the size of front cover 12 is consistent with the size of box 11;

[0033] When working, the plan view of box 11 is concave, and the size of front cover 12 is consistent with the size of box 11 by the structural design, which improves the sealing property between the size of front cover 12 and box 11 during installation.

[0034] Further, the upper and lower ends of front cover 12 are tightly attached to the inner side of base 14;

[0035] When working, the upper and lower ends of front cover 12 are tightly attached to the inner side of base 14 by the structural design, so that base 14 supports front cover 12, which improves the stability of front cover 12 during installation.

[0036] Further, the bottom of DN25 flange 5 is fixedly connected with installation pipe 9, and the side of installation pipe 9 is rotatably connected with oil discharge valve 10;

[0037] Further, the top cover 17 and the bottom box 18 are provided with grooves 20 on both sides, the top cover 17 is provided with a through groove 21 near the center point, the bottom box 18 is fixedly connected with a clamping column 19 near the four corners, the bottom of the top cover 17 is clamped with the surface of the clamping column 19, and the inside of the top cover 17 and the bottom box 18 is filled with single-molecule silica gel;

[0038] In operation, the clamping column 19 is fixedly connected with the bottom of the top cover 17, the bottom of the top cover 17 is clamped with the surface of the clamping column 19, so that the top cover 17 and the bottom box 18 are convenient to disassemble and assemble, and the single-molecule silica gel filled in the inside of the top cover 17 and the bottom box 18 improves the sealing performance of the device;

[0039] Working principle: the structure of the corrugated expander 1 of the corrugated oil pillow has the following effects:

[0040] 1. The transformer oil in the corrugated expander 1 is more, the corrugated expander 1 is stretched, the corrugated expander 1 generates a downward shrinkage force, the shrinkage force acts on the transformer oil liquid surface, and the pressure sensed by the pressure transmitter is the resultant force of the pressure generated by the transformer oil and the force of the corrugated expander 1.

[0041] 2. The transformer oil in the corrugated expander 1 is appropriate, so that the corrugated expander does not deform. The corrugated expander does not generate force on the transformer oil. At this time, the pressure sensed by the pressure transmitter is only the pressure generated by the transformer oil.

[0042] 3. The transformer oil in the corrugated expander 1 is less, the corrugated expander 1 is contracted, the corrugated expander 1 generates a upward stretching force on the liquid surface, the stretching force acts on the transformer oil liquid surface, and the pressure sensed by the pressure transmitter is the pressure generated by the transformer oil minus the force of the corrugated expander.

[0043] When the pressure transmitter 1 and the pressure transmitter 2 of the device need to be maintained, the upper rotating rod 15 and the lower rotating rod 16 at the upper and lower ends of the box body 11 are rotated by 90 degrees to any side, and then the front cover 12 is slidably disassembled, so that the device is maintained;

[0044] When the device is installed, the clamping column 19 at the top of the bottom box 18 is aligned with the bottom surface of the top cover 17, the top cover 17 and the bottom box 18 are clamped and installed between each other to store oil leakage, the through groove 21 on the surface of the top cover 17 is clamped and installed between the pressure transmitter 1 and the pressure transmitter 2, the bolts are wrapped in the inside of the top cover 17 and the bottom box 18, and the inside of the top cover 17 and the bottom box 18 is filled with single-molecule silica gel, so that the sealing performance of the device is improved and the oil leakage effect is achieved.

[0045] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A master transformer oil pad oil level monitoring device comprising a test conduit (4), characterised in that: The upper and lower ends of the test pipeline (4) are fixedly connected with DN25 gas hole flange (3) and DN25 flange (5) respectively, the top of the DN25 gas hole flange (3) is fixedly connected with the connecting pipeline (2), the top of the connecting pipeline (2) is fixedly connected with the corrugated expander (1), the side of the DN25 gas hole flange (3) is provided with the exhaust hole (6), the side of the test pipeline (4) is fixedly connected with the pressure transmitter one (7) and the pressure transmitter two (8), the surface of the test pipeline (4) is clamped with the box body (11), the inner side of the box body (11) is clamped with the front cover (12), the inside of the front cover (12) is fixedly embedded with the man-machine control module (13), the upper and lower sides of the box body (11) are fixedly connected with the base (14), the surface of the test pipeline (4) is clamped with the top cover (17) and the bottom box (18).

2. The oil level monitoring device for a main transformer oil pillow according to claim 1, characterized in that: The front side of one of the bases (14) is rotatably connected with the upper rotating rod (15), and the inner side of the upper rotating rod (15) is attached to the surface of the front cover (12).

3. The oil level monitoring device for a main transformer oil pillow according to claim 1, characterized in that: The front side of the other base (14) is rotatably connected with the lower rotating rod (16), and the lower rotating rod (16) is close to one third of the lower rotating rod (16) at the shaft center of the base (14).

4. The oil level monitoring device for a main transformer oil pillow according to claim 1, characterized in that: The top view of the box body (11) is concave, and the size of the front cover (12) is consistent with the size of the box body (11).

5. The oil level monitoring device for a main transformer oil pillow according to claim 1, characterized in that: The upper and lower ends of the front cover (12) are tightly attached to the inner side of the base (14).

6. A main transformer oil pillow level monitoring device as claimed in claim 1, wherein: The bottom of the DN25 flange (5) is fixedly connected with the mounting pipe (9), and the side of the mounting pipe (9) is rotatably connected with the oil discharge valve (10).

7. The main oil pillow oil level quick detection and verification device of claim 1, wherein: The two sides of the top cover (17) and the bottom box (18) are provided with grooves (20), the top of the top cover (17) is provided with a through groove (21) close to the center point, the top of the bottom box (18) is fixedly connected with the clamping column (19) close to the four corners, the bottom of the top cover (17) is clamped with the surface of the clamping column (19), and the inside of the top cover (17) and the bottom box (18) is filled with single molecule silica gel.

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