CN217606676U - Current transformer installation mechanism of oil-immersed transformer - Google Patents
Current transformer installation mechanism of oil-immersed transformer Download PDFInfo
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- CN217606676U CN217606676U CN202221390858.XU CN202221390858U CN217606676U CN 217606676 U CN217606676 U CN 217606676U CN 202221390858 U CN202221390858 U CN 202221390858U CN 217606676 U CN217606676 U CN 217606676U
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Abstract
The utility model relates to a current transformer mounting mechanism of an oil-immersed transformer, the current transformer is clamped and fixed by an upper insulating plate and a lower insulating plate, and a paper board with a central hole is fixed above the current transformer; one side of the current transformer is positioned above the clamping piece, the side of the insulating plate below the current transformer is attached to the upper side surface of the horizontal plate of the clamping piece, and a metal fastener is connected between the upper insulating plate, the lower insulating plate and the horizontal plate of the clamping piece; the other side of the current transformer is positioned in the wiring space of the transformer switch lead, and an insulating fastener is connected between the upper insulating plate and the lower insulating plate on the other side. The current transformer is installed in an oil tank of the oil-immersed transformer body, and the transformer is fixed on a clamping piece through a fastening piece through an upper insulating plate, a lower insulating plate and a paper board. The mounting mechanism is simpler in structure, only the upper end and the lower end of the screw rod are fixed through the nuts, the manufacturing cost is lower, the safety and the reliability are higher, the mounting mechanism can be mounted in place before leaving a factory, and the mounting mechanism does not need to be mounted on site.
Description
Technical Field
The utility model relates to an oil-immersed transformer's current transformer installation mechanism.
Background
As a prior art, current transformers are usually mounted in a raised seat on the cover of an oil-filled transformer. The lifting seat and the transformer main body are in a split assembly relationship, are separately transported and are assembled on the using site. The disadvantages of this mounting are: the current transformer is easy to damage in the field installation process, the replacement is more complicated, and the manpower, material resources and financial resources are wasted. In addition, for a part of oil-immersed transformers, the current transformer is difficult to assemble in the lifting seat or even cannot be assembled due to the limitation of installation and installation space.
In order to solve the technical problem, chinese utility model that the bulletin number is CN204242727U authorizes discloses an oil-immersed transformer improvement structure with current transformer, adopt case lid lower part mounting means, with current transformer and case lid assembly after fixing well, high durability and convenient operation, can make full use of oil tank inner space, reduce transformer structure spare and transformer oil cost and outward appearance pleasing to the eye, and simultaneously, the current transformer wiring board has been cancelled, the cost of current transformer has been reduced, it is spacing to the high-voltage lead-out wire to adopt the hardboard that has the locating hole, make the insulating effect between high-voltage lead-out wire and current transformer obtain the assurance.
However, the patent technology has the following defects: firstly, through the installation of hoist and mount formula, it installs four metal screw rods under the case lid, and metal screw rod distributes around high-pressure tap switch and lead wire, causes certain influence to the switch lead wire overall arrangement. Secondly, the mounting structure has certain restriction requirement on the inner diameter of the current transformer, and the inner diameter of the transformer needs to be matched with the inner diameter of the porcelain sleeve at the lower end of the sleeve, so that the design limitation of the transformer is caused. Thirdly, the installation steps of the mutual inductor are also quite complex, firstly four screw rods are required to be installed on four nuts under the box cover, positioning nuts are required to be installed below the nuts and above the supporting plate, and the installation and the adjustment are very inconvenient. In addition, the upper portion of the mutual inductor needs to extend into the porcelain bushing, the porcelain bushing is a fragile part, and the porcelain bushing is positioned by the aid of the porcelain bushing, so that the risk of damage to the porcelain bushing is avoided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, a current transformer installation mechanism of oil-immersed transformer is provided, install current transformer inside transformer body oil tank through more convenient mounting means to solve the insulating problem between installation mechanism part and high-pressure tap switch and the lead wire, in order to reach the purpose that further improves mutual-inductor stability.
The technical scheme of the utility model as follows:
a current transformer installation mechanism of an oil-immersed transformer comprises body oil of the oil-immersed transformer
The case is located inside the body oil tank and be used for pressing from both sides the folder of tight transformer core and be located inside the body oil tank and have the current transformer of centre bore, its characterized in that: the current transformer is clamped and fixed by an upper insulating plate and a lower insulating plate which are respectively provided with a central hole, and a paper board with the central hole is fixed between the current transformer and the insulating plate above the current transformer; the central hole of the insulating plate, the central hole of the paper board and the central hole of the current transformer are coaxially arranged; one side of the current transformer is positioned above the clamping piece, the side of the insulating plate below the current transformer is attached to the upper side surface of the horizontal plate of the clamping piece, and metal fasteners are connected between the upper insulating plate, the lower insulating plate and the horizontal plate of the clamping piece; the other side of the current transformer is positioned in the wiring space of the transformer switch lead, and an insulating fastener is connected between an upper insulating plate and a lower insulating plate on the side.
Preferably, the clamping piece is a channel steel, and the insulating plate below the current transformer is attached to and mounted on the upper side face of the upper wing plate of the channel steel.
Preferably, the lower side of the insulating plate above the current transformer and the upper side of the insulating plate below the current transformer are respectively provided with an annular step for radially positioning the upper end and the lower end of the current transformer.
Preferably, the metal fastening piece and the insulating fastening piece each comprise a screw rod with nuts at two ends.
Further preferably, the insulation fastener comprises a bakelite screw rod with two ends respectively provided with a bakelite nut.
The utility model has the advantages as follows:
first, the utility model discloses install current transformer inside oil-immersed transformer body oil tank to pass through the fastener through upper and lower insulator (wooden) and cardboard to the mutual-inductor and fix on the folder. The mounting mechanism is simpler in structure, only the upper end and the lower end of the screw rod are fixed through the nuts, the manufacturing cost is lower, the safety and the reliability are higher, the mounting mechanism can be mounted in place before leaving a factory, and the mounting mechanism does not need to be mounted on site. And secondly, two sets of insulating fasteners are adopted to be connected with an upper insulating part and a lower insulating part (wood part) serving as the insulating parts at the same side, so that the mutual inductor installation mechanism component can be effectively prevented from being in contact with a tap changer lead in a transformer body oil tank or in close contact with the tap changer lead to generate discharge, and the insulation reliability of equipment is further improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a paperboard, 2, a wood piece, 3, a current transformer, 4, an insulating fastener, 5, a transformer cable, 6, a clamping piece, 7, a metal fastener, 8 and a body oil tank are arranged.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention includes a body tank 8 of an oil-immersed transformer and is located in the body tank
Inside the body tank 8 and for clamping the clamp 6 of the transformer core, said clamp 6 is usually in the form of a channel. The embodiment of the utility model discloses an still including installing the inside current transformer 3 of body oil tank 8. The current transformer 3 is provided with a central hole.
The current transformer 3 is clamped and fixed by upper and lower wooden pieces 2 serving as insulating plates, the wooden pieces 2 are provided with center holes, and a paper board 1 with the center holes is fixed between the current transformer 3 and the wooden pieces 2 above the current transformer 3. The central hole of the cardboard 1, the central hole of the wooden piece 2 and the central hole of the current transformer 3 are coaxially arranged.
The left side of the wooden piece 2 below the current transformer 3 is attached to the upper side of the horizontal plate of the clip 6, and the left side of the wooden piece 2 is typically attached to the upper side of the upper wing plate of the channel steel serving as the clip 6. Both ends all surpass current transformer 3 about wooden 2, the left end portion (the part that surpasss current transformer 3) of wooden 2 and folder 6 (specifically be connected with metal fastener 7 between the last pterygoid lamina of channel-section steel). An insulating fastener 4 is connected between the right end parts (parts beyond the current transformer 3) of the wooden pieces 2. The metal fastening piece 7 and the insulating fastening piece 4 respectively comprise screw rods with nuts at two ends.
Further, the lower side of the wooden piece 2 above the current transformer 3 and the upper side of the wooden piece 2 below the current transformer 3 are respectively provided with an annular step for radially positioning the upper end and the lower end of the current transformer 3. The aperture of the inner hole of the annular step is consistent with the central hole of the wood piece 2, and the aperture of the outer hole is equal to or slightly larger than the outer diameter of the current transformer 3.
The transformer cable 5 sequentially passes through the center hole of the lower wooden piece 2, the center hole of the current transformer 3, the center hole of the upper wooden piece 2 and the center hole of the paper board 1 from bottom to top and then is led out of the body oil tank 8.
The central hole of the cardboard 1 is used for restraining the transformer cable 5 from running through current
The central hole of the mutual inductor 3 is arranged at the central position, so the aperture of the central hole of the paper board 1 is smaller than that of the central hole of the current mutual inductor 3. The size of the central hole opening of the cardboard 1 may be determined according to the diameter of the transformer cable 5. The opening size of the central hole of the wooden piece 2 is the same as that of the central hole of the current transformer 3.
Since the clip 6 is generally a channel steel, the connection between the left end of the wooden piece 2 and the clip 6 is gold
The accessories are metal screw rods and metal nuts. Upper and lower pieces of wood to avoid being close to the transformer switch lead
The connection between the right ends of the pieces 2 is an insulator, typically a bakelite screw and a bakelite nut.
In the oil tank 8 of the oil-immersed transformer, the right end of the wooden part 2 is located in a wiring space of a transformer switch lead.
Claims (5)
1. A current transformer installation mechanism of an oil-immersed transformer comprises body oil of the oil-immersed transformer
Case (8), be located inside body oil tank (8) and be used for pressing from both sides the folder (6) of tight transformer core and be located inside body oil tank (8) and have current transformer (3) of centre bore, its characterized in that: the current transformer (3) is clamped and fixed by an upper insulating plate and a lower insulating plate which are respectively provided with a central hole, and a paper board (1) with a central hole is fixed between the current transformer (3) and the insulating plate above the current transformer (3); the central hole of the insulating plate, the central hole of the paper board (1) and the central hole of the current transformer (3) are coaxially arranged; one side of the current transformer (3) is positioned above the clamping piece (6), the side of the insulating plate below the current transformer (3) is attached to the upper side surface of the horizontal plate of the clamping piece (6), and a metal fastening piece (7) is connected between the upper insulating plate, the lower insulating plate and the horizontal plate of the clamping piece (6); the other side of the current transformer (3) is positioned in a wiring space of a transformer switch lead, and an insulating fastener (4) is connected between an upper insulating plate and a lower insulating plate on the side.
2. The current transformer mounting mechanism of an oil-filled transformer of claim 1, wherein: the clamping piece (6) is a channel steel, and an insulating plate below the current transformer (3) is attached to the upper side face of the upper wing plate of the channel steel.
3. The current transformer mounting mechanism of an oil-filled transformer of claim 1, wherein: and annular steps for radially positioning the upper end and the lower end of the current transformer (3) are respectively arranged on the lower side of the insulating plate above the current transformer (3) and the upper side of the insulating plate below the current transformer (3).
4. The current transformer mounting mechanism of an oil filled transformer of claim 1, wherein: the metal fastening piece (7) and the insulating fastening piece (4) respectively comprise screw rods with nuts at two ends.
5. The current transformer mounting mechanism of an oil-filled transformer of claim 4, wherein: the insulating fastener (4) comprises a bakelite screw rod with bakelite nuts at two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221390858.XU CN217606676U (en) | 2022-06-06 | 2022-06-06 | Current transformer installation mechanism of oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221390858.XU CN217606676U (en) | 2022-06-06 | 2022-06-06 | Current transformer installation mechanism of oil-immersed transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217606676U true CN217606676U (en) | 2022-10-18 |
Family
ID=83587724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221390858.XU Active CN217606676U (en) | 2022-06-06 | 2022-06-06 | Current transformer installation mechanism of oil-immersed transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217606676U (en) |
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2022
- 2022-06-06 CN CN202221390858.XU patent/CN217606676U/en active Active
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