Transformer oil conservator structure for linkage of three single-phase on-load switches

Abstract

The utility model discloses a transformer oil conservator structure for linkage of three single-phase on-load switches, which comprises a transformer body, on-load tap-changers, a switch oil conservator, an oil gathering pipe, branch oil pipes and a switch gas relay. The on-load tap-changers comprise an A-phase on-load tap-changer, a B-phase on-load tap-changer and a C-phase on-load tap-changer; the branch oil pipes comprise an A-phase branch oil pipe, a B-phase branch oil pipe and a C-phase branch oil pipe, the switch oil conservator is connected with the oil gathering pipe, the oil gathering pipe is connected with the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe, and the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe are connected with the A-phase on-load tap-changer, the B-phase on-load tap-changer and the C-phase on-load tap-changer respectively. And switch gas relays are arranged on the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe, so that the technical problems that in the prior art, due to the existence of three switch oil conservators, materials and cost required by transformer production are increased, assembly is inconvenient, and transformer transportation is not facilitated are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer equipment, and particularly relates to a transformer oil storage cabinet structure used for linkage of three single-phase on-load switches. Background Art

[0002] For large-capacity (rated capacity greater than 63000kVA), large-current (rated current greater than 1000A), on-load tap-changing power transformers with a rated voltage level of 35KV and above, the current on the high-voltage side is too large, and conventional 600A three-phase switches are difficult to meet the requirements.

[0003] At present, the conventional approach to solving the above problem is to use three single-phase on-load switches to adjust the voltage in linkage. Since the oil volume changes during the operation of the transformer, the on-load switch needs to be equipped with a switch oil conservator to replenish the oil and slow down the oil oxidation. In the conventional design, one single-phase on-load switch needs to be equipped with one switch oil conservator, so three single-phase on-load switches need to be equipped with three switch oil conservators. Due to the excessive number of switch oil conservators, the materials and costs required for the production of the transformer increase, and the assembly is difficult. At the same time, the three switch oil conservators also occupy a considerable space on the top cover of the transformer, which increases the overall volume of the transformer and is not conducive to the transportation of the transformer. Utility Model Content

[0004] The purpose of the utility model is to provide a transformer oil storage cabinet structure for three single-phase on-load switches, so as to overcome the technical problems in the prior art that the three switch oil storage cabinets increase the materials and costs required for the production of the transformer, make assembly difficult, and occupy a considerable space on the transformer top cover, thereby increasing the overall volume of the transformer and being unfavorable for the transportation of the transformer. The specific technical solution is as follows:

[0005] A transformer oil storage cabinet structure for linkage of three single-phase on-load switches, comprising a transformer body, an on-load tap changer, a switch oil storage cabinet, an oil manifold, a branch oil pipe and a switch gas relay;

[0006] The on-load tap changer is arranged on one side of the top of the transformer body, including an A-phase on-load tap changer, a B-phase on-load tap changer and a C-phase on-load tap changer;

[0007] The switch oil conservator is arranged at one end of the transformer body;

[0008] One end of the oil manifold is connected to the switch oil storage cabinet;

[0009] The branch oil pipes include an A-phase branch oil pipe, a B-phase branch oil pipe and a C-phase branch oil pipe, one end of each of the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe is connected to the A-phase on-load tap changer, the B-phase on-load tap changer and the C-phase on-load tap changer, respectively, and the other end of each of them is connected to the other end of the oil manifold;

[0010] A switching gas relay is provided on each of the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe, and the switching gas relay is used to control the on and off of the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe.

[0011] Preferably, the switch oil conservator is arranged above one end of the transformer body through a first bracket, the oil collecting pipe is connected to the bottom end of the switch oil conservator, and the horizontal height of the connection point between the switch oil conservator and the oil collecting pipe is higher than the horizontal height of the on-load tap changer.

[0012] Preferably, the oil manifold is connected to the switch oil storage cabinet through a first butterfly valve.

[0013] Preferably, the first butterfly valve is a DN50 butterfly valve.

[0014] Preferably, a transformer body oil conservator is also provided on the transformer body, and the transformer body oil conservator is arranged above one end of the transformer body away from the switch oil conservator through a second bracket, and the transformer body oil conservator is connected to the transformer body through a second butterfly valve and an oil pipeline.

[0015] Preferably, the switch oil conservator and the transformer body oil conservator are both cylindrical, the cross-sectional area and height of the switch oil conservator are smaller than the cross-sectional area and height of the transformer body oil conservator, and the horizontal height of the horizontal plane where the central axis of the switch oil conservator is located is lower than the horizontal height of the horizontal plane where the central axis of the transformer body oil conservator is located.

[0016] Preferably, oil level gauges are provided in both the switch oil conservator and the transformer body oil conservator.

[0017] Preferably, the nominal diameter of the oil manifold is 50 mm.

[0018] Preferably, the nominal diameters of the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe are all 25 mm.

[0019] Compared with the existing technology, the utility model has the following beneficial effects:

[0020] The utility model provides a transformer oil storage cabinet structure for the linkage of three single-phase on-load switches. The switch oil storage cabinet is connected to an oil collection pipe, and the oil collection pipe is respectively connected to the A-phase on-load tap-changer, the B-phase on-load tap-changer and the C-phase on-load tap-changer through an A-phase branch oil pipe, a B-phase branch oil pipe and a C-phase branch oil pipe, and a switch gas relay is arranged on the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe. Oil is supplied to the three single-phase on-load tap-changers through one switch oil storage cabinet, thereby solving the technical problems in the prior art that the materials and costs required for the production of the transformer are increased, the assembly is difficult, and a considerable space on the transformer top cover is occupied, thereby increasing the overall volume of the transformer and being unfavorable for the transportation of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 It is a top view of the utility model.

[0023] Description of main reference numerals:

[0024] 1-transformer body, 2-on-load tap changer, 3-switch oil conservator, 4-oil manifold, 5-branch oil pipe, 6-switch gas relay, 7-A phase on-load tap changer, 8-B phase on-load tap changer, 9-C phase on-load tap changer, 10-A phase branch oil pipe, 11-B phase branch oil pipe, 12-C phase branch oil pipe, 13-first bracket, 14-first butterfly valve, 15-transformer body oil conservator, 16-second bracket, 17-second butterfly valve, 18-oil pipeline. DETAILED DESCRIPTION

[0025] 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.

[0026] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.

[0029] Example

[0030] like Figure 1 As shown, an embodiment of the present application provides a transformer oil conservator structure for linkage of three single-phase on-load switches, comprising a transformer body 1, an on-load tap changer 2, a switch oil conservator 3, an oil manifold 4, a branch oil pipe 5, and a switch gas relay 6;

[0031] The on-load tap changer 2 is arranged on one side of the top of the transformer body 1, including an A-phase on-load tap changer 7, a B-phase on-load tap changer 8 and a C-phase on-load tap changer 9. The switch oil conservator 3 is arranged at one end of the transformer body 1. One end of the oil manifold 4 is connected to the switch oil conservator 3. The branch oil pipe 5 includes an A-phase branch oil pipe 10, a B-phase branch oil pipe 11 and a C-phase branch oil pipe 12. The A-phase branch oil pipe 10, the B-phase branch oil pipe 11 and the C-phase branch oil pipe 12 are connected to the branch oil pipe 5. One end of each oil pipe 12 is connected to the A-phase on-load tap changer 7, the B-phase on-load tap changer 8 and the C-phase on-load tap changer 9 respectively, and the other end of each oil pipe is connected to the other end of the oil collecting pipe 4. The A-phase branch oil pipe 10, the B-phase branch oil pipe 11 and the C-phase branch oil pipe 12 are each provided with a switching gas relay 6, and the switching gas relay 6 is used to control the on and off of the A-phase branch oil pipe 10, the B-phase branch oil pipe 11 and the C-phase branch oil pipe 12.

[0032] Specifically, the switch oil conservator 3 is arranged above one end of the transformer body 1 through a first bracket 13, the oil manifold 4 is connected to the bottom end of the switch oil conservator 3, and the horizontal height of the connection point between the switch oil conservator 3 and the oil manifold 4 is higher than the horizontal height of the on-load tap changer 2, the oil manifold 4 is connected to the switch oil conservator 3 through a first butterfly valve 14, the first butterfly valve 14 is a DN50 butterfly valve, the nominal diameter of the oil manifold 4 is 50 mm, and the nominal diameters of the A-phase branch oil pipe 10, the B-phase branch oil pipe 11 and the C-phase branch oil pipe 12 are all 25 mm.

[0033] Among them, when the embodiment of the present application is in use, insulating oil is supplied to the A-phase on-load tap changer 7, the B-phase on-load tap changer 8 and the C-phase on-load tap changer 9 through one switch oil conservator 3, thereby solving the technical problems in the prior art that the materials and costs required for producing the transformer are increased, the assembly is difficult, and a considerable space on the transformer top cover is occupied, thereby increasing the overall volume of the transformer and being unfavorable for the transportation of the transformer.

[0034] In some embodiments, a transformer body oil conservator 15 is also provided on the transformer body 1. The transformer body oil conservator 15 is arranged above an end of the transformer body 1 away from the switch oil conservator 3 through a second bracket 16. The transformer body oil conservator 15 is connected to the transformer body 1 through a second butterfly valve 17 and an oil pipeline 18.

[0035] Specifically, the switch oil conservator 3 and the transformer body oil conservator 15 are both cylindrical, the cross-sectional area and height of the switch oil conservator 3 are both smaller than the cross-sectional area and height of the transformer body oil conservator 15, the horizontal height of the horizontal plane where the central axis of the switch oil conservator 3 is located is lower than the horizontal height of the horizontal plane where the central axis of the transformer body oil conservator 15 is located, and oil level gauges are provided in the switch oil conservator 3 and the transformer body oil conservator 15, and the two oil level gauges are respectively used to detect the oil amount in the switch oil conservator 3 and the transformer body oil conservator 15, so that the oil amount in the switch oil conservator 3 and the transformer body oil conservator 15 is maintained at their respective central axes.

[0036] Among them, by arranging the switch cabinet oil conservator 3 and the transformer body oil conservator 15 to be located at opposite ends above the transformer body, respectively, it is convenient to arrange the connecting pipes on the transformer body and reduce the difficulty of arranging the connecting pipes; by arranging the cross-sectional area and height of the switch oil conservator 3 to be smaller than the cross-sectional area and height of the transformer body oil conservator 15, the horizontal height of the horizontal plane where the central axis of the switch oil conservator 3 is located is lower than the horizontal height of the horizontal plane where the central axis of the transformer body oil conservator 15 is located, when the on-load tap changer 2 leaks or penetrates, since the oil pressure in the transformer body oil conservator 15 is higher than the oil pressure in the switch oil conservator 3, the oil in the on-load tap changer 2 cannot penetrate into the transformer body.

[0037] In summary, the embodiment of the present application provides a transformer oil conservator structure for linkage of three single-phase on-load switches, which connects the switch oil conservator to the oil manifold, connects the oil manifold to the A-phase on-load tap-changer, the B-phase on-load tap-changer and the C-phase on-load tap-changer through the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe, respectively, and provides switch gas relays on the A-phase branch oil pipe, the B-phase branch oil pipe and the C-phase branch oil pipe, and supplies oil to the three single-phase on-load tap-changers through one switch oil conservator, thereby solving the problems in the prior art of the existence of three switch oil conservators, which increase the materials and costs required for the production of the transformer, the difficulty in assembly, and the increase in the overall volume of the transformer due to the considerable space occupied on the transformer top cover. The invention is beneficial to the technical problem of transformer transportation. At the same time, the switch oil conservator and the transformer body oil conservator are arranged at two opposite ends above the transformer body, which is convenient for arranging the connecting pipes on the transformer body and reduces the difficulty of connecting pipe arrangement. By arranging that the cross-sectional area and height of the switch oil conservator are smaller than the cross-sectional area and height of the transformer body oil conservator, the horizontal height of the horizontal plane where the central axis of the switch oil conservator is located is lower than the horizontal height of the horizontal plane where the central axis of the transformer body oil conservator is located, that is, the amount of oil in the switch oil conservator is less than the amount of oil in the transformer body oil conservator. When the on-load tap changer leaks or penetrates, since the oil pressure in the transformer body oil conservator is higher than the oil pressure in the switch oil conservator, the oil in the on-load tap changer cannot penetrate into the transformer body.

[0038] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches, characterized in that: It comprises a transformer body (1), an on-load tap changer (2), a switch oil storage cabinet (3), an oil collection pipe (4), a branch oil pipe (5) and a switch gas relay (6); The on-load tap changer (2) is arranged on one side of the top end of the transformer body (1), and comprises an A-phase on-load tap changer (7), a B-phase on-load tap changer (8) and a C-phase on-load tap changer (9); The switch oil storage cabinet (3) is arranged at one end of the transformer body (1); One end of the oil collecting pipe (4) is in communication with the switch oil storage cabinet (3); The branch oil pipe (5) comprises an A-phase branch oil pipe (10), a B-phase branch oil pipe (11) and a C-phase branch oil pipe (12); one end of each of the A-phase branch oil pipe (10), the B-phase branch oil pipe (11) and the C-phase branch oil pipe (12) is respectively connected to the A-phase on-load tap changer (7), the B-phase on-load tap changer (8) and the C-phase on-load tap changer (9), and the other end of each of the branch oil pipes is in communication with the other end of the oil collecting pipe (4); The A-phase branch oil pipe (10), the B-phase branch oil pipe (11) and the C-phase branch oil pipe (12) are each provided with a switch gas relay (6), and the switch gas relay (6) is used to control the on / off of the A-phase branch oil pipe (10), the B-phase branch oil pipe (11) and the C-phase branch oil pipe (12).

2. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 1, characterized in that: The switch oil conservator (3) is arranged above one end of the transformer body (1) via a first bracket (13); the oil collecting pipe (4) is connected to the bottom end of the switch oil conservator (3); and the level of the connection point between the switch oil conservator (3) and the oil collecting pipe (4) is higher than the level of the on-load tap changer (2).

3. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 2, characterized in that: The oil collection pipe (4) is connected to the switch oil storage cabinet (3) via a first butterfly valve (14).

4. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 3, characterized in that: The first butterfly valve (14) is a DN50 butterfly valve.

5. The transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 1 is characterized in that: The transformer body (1) is also provided with a transformer body oil conservator (15), which is arranged above an end of the transformer body (1) away from the switch oil conservator (3) via a second bracket (16), and the transformer body oil conservator (15) is connected to the transformer body (1) via a second butterfly valve (17) and an oil delivery pipe (18).

6. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 5, characterized in that: The switch oil conservator (3) and the transformer body oil conservator (15) are both cylindrical, the cross-sectional area and height of the switch oil conservator (3) are both smaller than the cross-sectional area and height of the transformer body oil conservator (15), and the horizontal height of the horizontal plane where the central axis of the switch oil conservator (3) is located is lower than the horizontal height of the horizontal plane where the central axis of the transformer body oil conservator (15) is located.

7. A transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 6, characterized in that: The switch oil conservator (3) and the transformer body oil conservator (15) are both provided with oil level gauges.

8. The transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 1 is characterized in that: The nominal diameter of the oil collecting pipe (4) is 50 mm.

9. The transformer oil storage cabinet structure for linkage of three single-phase on-load switches according to claim 1 is characterized in that: The nominal diameters of the A-phase branch oil pipe (10), the B-phase branch oil pipe (11) and the C-phase branch oil pipe (12) are all 25 mm.

Images