Transformer anti-vibration device and transformer assembly

Abstract

The utility model provides a transformer anti-vibration device and a transformer assembly, the transformer anti-vibration device comprises a first bolt structure, a second bolt structure and a third bolt structure, the first bolt structure comprises a first screw, a first nut, a first flat washer, a first belleville spring, a second nut, a second flat washer, a second belleville spring and a first shaft sleeve; an upper clamping piece of the transformer is step-shaped, an accommodating space is formed between the upper part of the step-shaped upper clamping piece and the hanging part, and a first shaft sleeve, a second nut, a second belleville spring and a second flat washer are arranged in the accommodating space; the first nut is screwed on the first screw rod and is propped against the upper part of the hanging part through the first belleville spring and the first flat washer; the first shaft sleeve is arranged on the first screw rod in a sleeving manner and abuts against the lower part of the hanging part; and the second nut is screwed on the first screw rod. The length of the clamping distance of the screw is increased through the first shaft sleeve, the negative effect caused by the sedimentation effect is reduced, and the step-shaped upper clamping piece can provide a containing space for the shaft sleeve and does not need to increase the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a transformer anti-vibration device and a transformer assembly. Background Art

[0002] Transformers are basic equipment for power transmission and distribution, and are widely used in industries, agriculture, transportation, urban communities, etc. Transformers will experience normal vibrations during their use, which can be ignored.

[0003] However, some special transformers, such as nacelle transformers and tower transformers, are in a vibration environment for a long time during operation, which makes it more likely that key bolts related to the transformer body will loosen, which can lead to transformer failure. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a transformer anti-vibration device and a transformer assembly to solve the problem in the prior art that transformer vibration leads to transformer failure.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the embodiment of the utility model is:

[0006] In a first aspect, an embodiment of the utility model provides a transformer vibration protection device, comprising:

[0007] At least one set of first bolt structures, each set of the first bolt structures comprising a first screw rod, a first nut, a first flat washer, a first disc spring, a second nut, a second flat washer, a second disc spring and a first sleeve;

[0008] Wherein, the first screw rod passes through the hanging part above the upper clamp of the transformer, the upper clamp of the transformer and the lower clamp of the transformer;

[0009] The upper clamp of the transformer is in a stepped shape, and an accommodation space is formed between the upper part of the stepped upper clamp and the hanging part of the transformer, and the first sleeve, the second nut, the second disc spring and the second flat washer are arranged in the accommodation space;

[0010] The first nut is screwed onto the first screw rod, and the first nut abuts against the upper side of the hanging portion through the first disc spring and the first flat washer;

[0011] The first shaft sleeve is sleeved on the first screw rod and abuts against the lower side of the hanging part;

[0012] The second nut is screwed onto the first screw rod, and the second nut abuts against the lower side of the first sleeve through the second disc spring and the second flat washer.

[0013] Optionally, each group of the first bolt structure further includes: a third nut, a fourth nut, a third flat washer, a third disc spring, a fourth flat washer, and a fourth disc spring;

[0014] Wherein, the third nut is screwed onto the first screw rod, and the third nut abuts against the upper part of the upper clamp through the third disc spring and the third flat washer;

[0015] The fourth nut is screwed onto the first screw rod, and the fourth nut abuts against the lower side of the lower clamp through the fourth disc spring and the fourth flat washer.

[0016] Optionally, it further comprises at least one set of second bolt structures;

[0017] Each set of the second bolt structure comprises a second screw rod, a fifth nut, a second sleeve, a fifth flat washer and a fifth disc spring;

[0018] One end of the second screw is fixedly connected to the foot of the transformer, and the other end of the second screw is passed through the lower clamp;

[0019] The fifth nut is screwed onto the other end of the second screw rod and abuts against the lower clamping member via the fifth disc spring, the fifth flat washer and the second sleeve.

[0020] Optionally, it further comprises at least one set of spring plate structures;

[0021] Each group of the spring plate structures comprises an elastic plate, a positioning pin and a support plate;

[0022] Wherein, the upper clamping member presses against the pressure plate of the transformer through the support plate and the elastic plate in sequence, and / or the lower clamping member presses against the pressure plate of the transformer through the support plate and the elastic plate in sequence;

[0023] The pressing plate presses against the coil of the transformer;

[0024] A blind hole is provided on the pressure plate of the transformer, a through hole is provided on the elastic plate, and the positioning pin passes through the through hole and is inserted into the blind hole.

[0025] Optionally, the elastic plate is a silicone rubber plate.

[0026] An embodiment of the utility model further provides a transformer assembly, comprising a transformer and a transformer anti-vibration device as described in any one of the above.

[0027] The beneficial effects of the utility model are:

[0028] The transformer vibration protection device provided in this embodiment includes at least one group of first bolt structures, which serve as hanging bolts. The first nut is abutted against the upper part of the hanging part of the transformer through the first disc spring and the first flat washer, and the second nut is abutted against the lower part of the hanging part of the transformer through the second disc spring and the second flat washer. In addition, a first sleeve is added between the second disc spring and the lower part of the hanging part. When the bolt structure is loose, part of the potential energy is released by the disc spring to keep the pressure of the connecting part to meet the torque requirement, and the length of the screw clamping distance is increased by the first sleeve to further reduce the negative effects caused by the settlement effect. In addition, the upper clamp of the transformer is designed to be stepped, and an accommodating space is formed between the upper part of the stepped upper clamp and the hanging part of the transformer. The first sleeve, the second nut, the second disc spring and the second flat washer are arranged in the accommodating space, which not only ensures the setting space of the sleeve, but also does not need to change the size of the transformer and increase the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A front view showing a transformer anti-vibration device provided in an embodiment of the utility model;

[0030] Figure 2 A schematic diagram showing installation details of a first bolt structure provided in an embodiment of the utility model;

[0031] Figure 3 A schematic diagram showing installation details of a second bolt structure provided in an embodiment of the utility model;

[0032] Figure 4 A top view showing a transformer anti-vibration device provided in an embodiment of the utility model;

[0033] Figure 5 A schematic diagram showing installation details of the spring plate structure provided in an embodiment of the utility model;

[0034] Figure 6 A side view of a transformer vibration isolation device provided in an embodiment of the utility model is shown.

[0035] Description of reference numerals:

[0036] 1-coil; 2-upper clamp; 3-lower clamp; 301-perforation; 4-iron core; 5-oil tank; 6-tank cover; 7-hanging part; 8-first screw; 9-first nut; 10-first flat washer; 11-first disc spring; 12-second nut; 13-second flat washer; 14-second disc spring; 15-first sleeve; 16-third nut; 17-fourth nut; 18-third flat washer; 19-third disc spring; 20-second screw; 21-fifth nut; 22-second sleeve; 23-fifth flat washer; 24-fifth disc spring; 25-foot; 26-pressure plate; 27-elastic plate; 28-positioning nail; 29-support plate; 30-third screw; 31-sixth nut; 32-seventh nut; 33-fourth screw; 34-eighth nut; 35-ninth nut. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0038] like Figure 1 As shown, an embodiment of the utility model provides a transformer anti-vibration device, which is connected to a transformer. The transformer includes a coil 1, an upper clamp 2, a lower clamp 3, an iron core 4, an oil tank 5, a tank cover 6, and a hanging portion 7 located above the upper clamp 2; wherein the upper clamp 2 is located above the coil 1, and the lower clamp 3 is located below the coil 1, and the upper clamp 2 and the lower clamp 3 are used to clamp the coil 1.

[0039] At least one set of first bolt structures is a hanging bolt, and the hanging portion 7 is used to cooperate with the hanging bolt to realize the hanging and transportation of the transformer.

[0040] Each set of the first bolt structure includes a first screw rod 8, a first nut 9, a first flat washer 10, a first disc spring 11, a second nut 12, a second flat washer 13, a second disc spring 14 and a first sleeve 15;

[0041] The first screw rod 8 passes through the hanging portion 7 above the upper clamping piece 2 of the transformer, the upper clamping piece 2 of the transformer and the lower clamping piece 3 of the transformer.

[0042] Specifically, the installation details diagram is as follows Figure 2As shown, the first nut 9 is screwed onto the first screw rod 8, and the first nut 9 abuts against the upper part of the hanging part 7 through the first disc spring 11 and the first flat washer 10. The first sleeve 15 is sleeved on the first screw rod 8 and abuts against the lower part of the hanging part 7; the second nut 12 is screwed onto the first screw rod 8, and the second nut 12 abuts against the lower part of the first sleeve 15 through the second disc spring 14 and the second flat washer 13. Figure 2 As shown, a protruding end of the first disc spring 11 faces the first nut 9 , and a protruding end of the second disc spring 14 faces the second nut 12 .

[0043] It should be noted that the disc spring is a special spring that is conical in the axial direction and bears load. After being deformed under load, it stores a certain amount of potential energy. When the bolt structure becomes loose, the disc spring releases part of the potential energy to keep the pressure between the connections to meet the torque requirements. The size of the disc spring in the embodiment of the utility model can be selected according to the needs.

[0044] The purpose of tightening the bolt or screw is to obtain a qualified clamping force, and the clamping force comes from the elasticity of the bolt. The elongation of the bolt is increased by the first sleeve to reduce the settlement effect. The elasticity of the fastener is increased to reduce the risk of self-loosening under vibration and lateral load. The load factor is increased, the amplitude of the dynamic stress of the bolt is reduced, and the risk of fatigue failure is minimized. In the case of hydraulic stretching, the load transfer loss is minimized. In the embodiment of the utility model, considering the negative effects brought about by the settlement effect, a first sleeve is added on the basis of using a disc spring, and the length of the screw clamping distance is increased by the first sleeve to further reduce the negative effects brought about by the settlement effect.

[0045] The length of the first sleeve is also called the "clamping length", i.e. the total thickness of the clamped parts in the compressed state. To optimize the bolt connection, the clamping length (i.e. the length of the first sleeve) can be designed to be 3 to 5 times the diameter of the first screw or longer.

[0046] Optionally, for the convenience of transportation, the first bolt structure is located as close to the side of the transformer as possible, and the first bolt structure is an even number of groups and is symmetrically arranged. Exemplarily, four groups of first bolt structures are arranged, and the four groups of first bolt structures are symmetrically distributed on two sides of the transformer.

[0047] The addition of the above structures may lead to a larger transformer size and higher cost. To avoid this, the upper clamp is designed to be stepped, which reduces the settlement effect while not changing the transformer size. Figure 1As shown, the upper clamp 2 of the transformer is in a stepped shape, and an accommodation space is formed between the upper part of the stepped upper clamp 2 and the suspension part 7 of the transformer, and the first sleeve 15, the second nut 12, the second disc spring 14 and the second flat washer 13 are arranged in the accommodation space. That is, the upper clamp 2 is designed to be stepped, which not only ensures the installation space of the sleeve, but also does not need to change the size of the transformer and increase the cost.

[0048] The hanging bolt can be used to hang the transfer transformer and tighten the transformer body. Therefore, each group of the first bolt structure further includes: a third nut 16, a fourth nut 17, a third flat washer 18, a third disc spring 19, a fourth flat washer, and a fourth disc spring;

[0049] Among them, Figure 2 As shown, the third nut 16 is screwed onto the first screw rod 8, and the third nut 16 abuts against the upper portion of the upper clamp 2 through the third disc spring 19 and the third flat washer 18;

[0050] Correspondingly, the fourth nut 17 is screwed onto the first screw rod 8 , and the fourth nut 17 abuts against the bottom of the lower clamp 3 through the fourth disc spring and the fourth flat washer.

[0051] One protruding end of the third disc spring 19 faces the third nut 16 , and one protruding end of the fourth disc spring faces the fourth nut 17 .

[0052] The third nut 16 , the third disc spring 19 and the third flat washer 18 are also disposed in the above-mentioned accommodation space.

[0053] In an optional embodiment, the transformer anti-vibration device further includes at least one set of second bolt structures, which may also be referred to as foot bolts;

[0054] Each set of the second bolt structure includes a second screw rod 20, a fifth nut 21, a second sleeve 22, a fifth flat washer 23 and a fifth disc spring 24;

[0055] One end of the second screw rod 20 is fixedly connected to the foot 25 of the transformer. Specifically, the second screw rod 20 and the foot 25 are a welding structure, that is, they are welded together. The other end of the second screw rod 20 passes through the lower clamp 3, that is, a through hole 301 is opened on the lower clamp 3, and the other end of the second screw rod 20 passes through the through hole 301; wherein, the foot 25 is located below the lower clamp 3.

[0056] Installation details diagram Figure 3As shown, the fifth nut 21 is screwed onto the other end of the second screw rod 20 , and abuts against the lower clamp 3 via the fifth disc spring 24 , the fifth flat washer 23 and the second sleeve 22 .

[0057] That is, in the embodiment of the utility model, in order to avoid the settlement effect, a sleeve is added to the second bolt structure. Similarly, in order to avoid the insufficient distance between the lower clamp 3 and the foot 25, a second sleeve is added to the other side of the lower clamp 3 away from the foot 25 (the principle is the same as above and will not be repeated here). Furthermore, in order to avoid the slope of the lower clamp made of channel steel causing the second sleeve to be unable to be laid flat and causing structural failure, a square groove is opened at the corresponding position and a steel plate is welded to ensure that the sleeve is flat when installed. This structure effectively avoids the problem of bolt loosening caused by the settlement effect, while not changing the original structure or the product size.

[0058] It should be noted that the number of the third bolt structures can be determined according to the number of the feet of the transformer.

[0059] Furthermore, if Figure 4 As shown, the transformer further includes a pressing plate 26 , and the pressing plate 26 presses against the coil 1 of the transformer. Specifically, the pressing plate 26 presses against the coil 1 above the coil 1 and / or below the coil 1 .

[0060] When the pressing plate 26 is located below the coil 1 , the pressing plate 26 may also be called a tray.

[0061] The transformer anti-vibration device further comprises at least one set of spring plate structures;

[0062] Each group of the spring plate structure includes an elastic plate 27, a positioning pin 28 and a support plate 29; optionally, the elastic plate 27 is a silicone rubber plate;

[0063] The upper clamp 2 presses the transformer pressure plate 26 (such as Figure 5 As shown), and / or, the lower clamp 3 presses the pressure plate of the transformer through the support plate and the elastic plate in sequence;

[0064] A blind hole is formed on the transformer pressure plate 26, a through hole is formed on the elastic plate 27, and the positioning pin 28 passes through the through hole and is inserted into the blind hole.

[0065] After the coil 1 is tightened by the first bolt structure, the silicone rubber sheet is compressed to store a certain amount of potential energy. When the bolt structure becomes loose, the silicone rubber sheet releases part of the potential energy to keep the pressure of the coil 1 meeting the torque requirement.

[0066] In order to prevent the silicone rubber plate from shifting during vibration, positioning pins are added to the support plate, through holes are added to the silicone rubber plate, and blind holes are added to the pressure plate. Positioning pins 28 are inserted through the through holes into the blind holes for positioning.

[0067] Optionally, in order to further increase the anti-vibration effect, the transformer anti-vibration device further includes at least one group of third bolt structures, each group of the third bolt structures includes a third screw rod 30, a sixth nut 31, a seventh nut 32, a sixth flat washer, a seventh flat washer, a sixth disc spring and a seventh disc spring;

[0068] The third screw rod 30 passes through the upper clamping member 2 and the lower clamping member 3, the sixth nut 31 is screwed onto the third screw rod, and the sixth nut 31 abuts against the upper portion of the upper clamping member through the sixth disc spring and the sixth flat washer; the protruding end of the sixth disc spring faces the sixth nut 31;

[0069] The seventh nut 32 is screwed onto the third screw rod 30 , and the seventh nut abuts against the lower side of the lower clamp through the seventh disc spring and the seventh flat washer; the protruding end of the seventh disc spring faces the seventh nut 32 .

[0070] When the bolt structure becomes loose, the disc spring releases some of its potential energy to maintain the pressure between the connections to meet the torque requirements, thereby reducing the settlement effect.

[0071] In order to ensure the vibration-proof effect, multiple sets of third bolt structures are provided, and the multiple sets of third bolt structures are respectively provided on two opposite sides of the transformer. For example, four sets of third bolt structures are provided, and the four sets of third bolt structures are symmetrically distributed on two opposite sides of the transformer.

[0072] In an optional embodiment, at least one fourth bolt structure is further included; the fourth bolt structure is a tension bolt, which is a very important bolt inside the transformer, and its anti-loosening and tightening function plays a vital role in the transformer;

[0073] like Figure 6 As shown, each group of the fourth bolt structure includes a fourth screw rod 33, an eighth nut 34, an eighth flat washer, an eighth disc spring, a ninth nut 35, a ninth flat washer, and a ninth disc spring;

[0074] Among them, the fourth screw 33 passes through the upper clamp 2 of the transformer or the fourth screw 33 passes through the lower clamp 3 of the transformer; preferably, a part of the fourth screw 33 passes through the upper clamp 2 of the transformer, and the other part of the fourth screw 33 passes through the lower clamp 3 of the transformer.

[0075] When the fourth screw rod 33 passes through the upper clamp 2 of the transformer, the eighth nut 34 is screwed onto the fourth screw rod 33, and abuts against one side of the upper clamp 2 through the eighth disc spring and the eighth flat washer. The ninth nut 35 is screwed onto the fourth screw rod 33, and abuts against the other side of the upper clamp 2 through the ninth disc spring and the ninth flat washer, so as to tighten the upper clamp 2. Specifically, the protruding end of the eighth disc spring faces the eighth nut 34, and the protruding end of the ninth disc spring faces the ninth nut 35.

[0076] When the fourth screw rod passes through the lower clamp of the transformer, the eighth nut is screwed onto the fourth screw rod, and abuts against one side of the lower clamp through the eighth disc spring and the eighth flat washer; the ninth nut is screwed onto the fourth screw rod, and abuts against the other side of the lower clamp through the ninth disc spring and the ninth flat washer, thereby tightening the lower clamp 3. Specifically, the protruding end of the eighth disc spring faces the eighth nut, and the protruding end of the ninth disc spring faces the ninth nut.

[0077] The fourth bolt structure is designed to solve the problem that the internal space of the transformer is small and there is not enough space to add a shaft sleeve. It plays a vital role in preventing the transformer from loosening and tightening the transformer.

[0078] Preferably, in order to ensure the anti-vibration effect, multiple groups of fourth bolt structures are provided, and the multiple groups of fourth bolt structures are respectively provided on two opposite sides of the transformer. Exemplarily, eight groups of fourth bolt structures are provided, and the eight groups of fourth bolt structures are symmetrically distributed on two opposite sides of the transformer. Among them, the second screws of four groups of fourth bolt structures are passed through the upper clamp 2, and the second screws of four groups of fourth bolt structures are passed through the lower clamp 3.

[0079] In an optional embodiment, the third bolt structure is symmetrically arranged on a first side and a second side opposite to the transformer;

[0080] The fourth bolt structure is disposed on a third side and a fourth side opposite to the transformer.

[0081] That is, in this optional embodiment, the third bolt structure and the fourth bolt structure are respectively arranged on two different opposite sides of the transformer.

[0082] An embodiment of the utility model further provides a transformer assembly, comprising a transformer and a transformer anti-vibration device as described in any one of the above.

[0083] The transformer comprises a coil, an upper clamp, a lower clamp, an iron core, an oil tank, a tank cover, a hanging part and a foot pad.

[0084] The upper clamp of the transformer is stepped, and an accommodation space is formed between the upper part of the stepped upper clamp and the hanging part of the transformer. The first sleeve, the second nut, the second disc spring and the second flat washer are arranged in the accommodation space.

[0085] It should be noted that the transformer assembly provided in the embodiment of the utility model includes the transformer anti-vibration device as described in any one of the above, and all embodiments of the above-mentioned transformer anti-vibration device are applicable to the transformer assembly and can achieve the same or similar technical effects.

[0086] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments, since they are basically similar to the product embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiments.

[0087] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0088] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0089] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0090] 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 should also be regarded as the protection scope of the present invention.

Claims

1. A transformer anti-vibration device, characterized in that: include: At least one set of first bolt structures, each set of the first bolt structures comprising a first screw rod, a first nut, a first flat washer, a first disc spring, a second nut, a second flat washer, a second disc spring and a first sleeve; Wherein, the first screw rod passes through the hanging part above the upper clamp of the transformer, the upper clamp of the transformer and the lower clamp of the transformer; The upper clamp of the transformer is in a stepped shape, and an accommodation space is formed between the upper part of the stepped upper clamp and the hanging part of the transformer, and the first sleeve, the second nut, the second disc spring and the second flat washer are arranged in the accommodation space; The first nut is screwed onto the first screw rod, and the first nut abuts against the upper side of the hanging portion through the first disc spring and the first flat washer; The first shaft sleeve is sleeved on the first screw rod and abuts against the lower side of the hanging part; The second nut is screwed onto the first screw rod, and the second nut abuts against the lower side of the first sleeve through the second disc spring and the second flat washer.

2. The transformer vibration isolation device according to claim 1, characterized in that: Each group of the first bolt structure further includes: a third nut, a fourth nut, a third flat washer, a third disc spring, a fourth flat washer, and a fourth disc spring; Wherein, the third nut is screwed onto the first screw rod, and the third nut abuts against the upper part of the upper clamp through the third disc spring and the third flat washer; The fourth nut is screwed onto the first screw rod, and the fourth nut abuts against the lower side of the lower clamp through the fourth disc spring and the fourth flat washer.

3. The transformer vibration isolation device according to claim 1, characterized in that: Also comprising at least one set of second bolt structures; Each set of the second bolt structure comprises a second screw rod, a fifth nut, a second sleeve, a fifth flat washer and a fifth disc spring; One end of the second screw is fixedly connected to the foot of the transformer, and the other end of the second screw is passed through the lower clamp; The fifth nut is screwed onto the other end of the second screw rod and abuts against the lower clamping member via the fifth disc spring, the fifth flat washer and the second sleeve.

4. The transformer vibration isolation device according to claim 1, characterized in that: Also includes at least one set of spring plate structures; Each group of the spring plate structures comprises an elastic plate, a positioning pin and a support plate; Wherein, the upper clamping member presses against the pressure plate of the transformer through the support plate and the elastic plate in sequence, and / or the lower clamping member presses against the pressure plate of the transformer through the support plate and the elastic plate in sequence; The pressing plate presses against the coil of the transformer; A blind hole is provided on the pressure plate of the transformer, a through hole is provided on the elastic plate, and the positioning pin passes through the through hole and is inserted into the blind hole.

5. The transformer vibration isolation device according to claim 4, characterized in that: The elastic plate is a silicone rubber plate.

6. A transformer assembly, characterized in that: The invention comprises a transformer and a transformer vibration protection device as claimed in any one of claims 1 to 5.

Images