A universal casting pile head mold for increasing creeping distance

Abstract

The utility model relates to a universal pouring pile head mold for increasing creepage distance, and relates to the field of auxiliary mechanisms of dry-type transformers, including a mold shell, which is mostly half-type and provided with a corresponding hollow glue injection chamber; the hollow glue injection chamber is of a special shape. By changing the high-voltage pile head to the pouring pile head mold casting in this application, the creepage distance and safety distance can be increased, the size of the high-voltage coil can be reduced, that is, the size of the transformer can be reduced, 35kV can be made into this universal pouring pile head, the number of molds is reduced, and the cost is reduced, and the pouring pile head has high strength and is not easy to be cracked.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary mechanisms of dry-type transformers, in particular to a universal pouring pile head mould for increasing creepage distance. Background Art

[0002] Dry-type transformers are widely used in local lighting, high-rise buildings, airports, docks, CNC machinery and equipment and other places. Simply put, dry-type transformers refer to transformers whose cores and windings are not immersed in insulating oil. The cooling methods are divided into natural air cooling (AN) and forced air cooling (AF). When the transformer is naturally cooled, it can operate continuously for a long time at the rated capacity. When forced air cooling, the transformer output capacity can be increased by 50%. It is suitable for intermittent overload operation or emergency overload operation; because the load loss and impedance voltage increase during overload are large, it is in a non-economic operation state, so it should not be in long-term continuous overload operation. The pile head is one of the important accessories of the dry-type transformer.

[0003] The pile head structure cast by the common casting pile head mold in the prior art can only meet the creepage distance and safety regulations required by conventional 10kV and 20kV dry-type transformers. If you want to use this pile head to meet the creepage distance of a 35kV transformer, you must increase the pile head to a large size and height to meet the requirements. As a result, the 35kV creepage distance and safety distance are not easy to meet, and the pile head is enlarged and raised, which wastes resin. At the same time, the pile head is too high, and the transformer size increases. Utility Model Content

[0004] The purpose of the utility model is to provide a universal pouring pile head mold with increased creepage distance to solve the above-mentioned problems existing in the prior art.

[0005] Technical solution: A universal cast pile head mold for increasing creepage distance, comprising a mold shell, the mold shell is of a multi-type and is provided with a corresponding hollow glue injection chamber; the hollow glue injection chamber is of a special shape.

[0006] In a further embodiment, the hollow glue injection chamber of the mold shell is provided with a plurality of groups of uneven glue injection channels, and the plurality of groups of uneven glue injection channels are interconnected through a through cavity with a predetermined operating size.

[0007] In a further embodiment, the mold shell is in two halves, namely, a left mold shell and a right mold shell; and the left mold shell and the right mold shell are symmetrically arranged and can cooperate to form a corresponding mold body.

[0008] In a further embodiment, the left mold shell is connected to the right mold shell by bolts.

[0009] Beneficial effect: The utility model relates to a universal pouring pile head mold for increasing creepage distance, and relates to the field of auxiliary mechanisms of dry-type transformers, including a mold shell, which is mostly half-type and provided with a corresponding hollow glue injection chamber; the hollow glue injection chamber is special-shaped. By changing the high-voltage pile head to the pouring pile head mold in this application, the creepage distance and safety distance can be increased, the size of the high-voltage coil can be reduced, that is, the size of the transformer can be reduced, 35kV can be made into this universal pouring pile head, the number of molds can be reduced, and the cost can be reduced. Moreover, this pouring pile head has high strength and is not easy to be cracked. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a partial schematic diagram of the mold shell described in this application.

[0011] Figure 2 It is a partial cross-sectional view of the mold shell described in this application.

[0012] Figure 3 It is a top view of the mold shell described in this application.

[0013] The reference numerals in the figures are: mold shell 1, left mold shell 2, right mold shell 3. DETAILED DESCRIPTION

[0014] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0015] Embodiment 1:

[0016] The universal cast pile head mold for increasing creepage distance proposed in this embodiment includes a mold shell 1, which is a half-type and is provided with a corresponding hollow glue injection chamber; the hollow glue injection chamber is a special shape. The mold shell 1 is open at both ends. The hollow glue injection chamber of the mold shell 1 is provided with multiple groups of uneven glue injection channels, and the multiple groups of uneven glue injection channels are interconnected through a through cavity with a predetermined operating size.

[0017] Embodiment 2:

[0018] On the basis of the first embodiment, the mold shell 1 is a two-half type, namely, a left mold shell 2 and a right mold shell 3; and the left mold shell 2 and the right mold shell 3 are symmetrically arranged and can cooperate to form a corresponding mold body. The left mold shell 2 and the right mold shell 3 are connected by bolts. In the later operation process, the left mold shell 2 and the right mold shell 3 can be connected by bolts, and then the corresponding pouring operation can be performed to complete the pouring and molding of the pile head. Then the above steps are reversed to remove the left mold shell 2 and the right mold shell 3.

[0019] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A universal casting pile head mold for increasing the creeping distance, characterized in that: It includes a mold shell, which is a half-type mold shell and is provided with a corresponding hollow glue injection cavity; the hollow glue injection cavity is a special shape; The hollow glue injection chamber of the mold shell is provided with a plurality of groups of uneven glue injection channels, and the plurality of groups of uneven glue injection channels are interconnected through a through cavity with a predetermined operating size.

2. A universal casting pile head mold for increasing creepage distance according to claim 1, characterized in that: The mold shell is in two halves, namely, a left mold shell and a right mold shell; and the left mold shell and the right mold shell are symmetrically arranged and can cooperate to form a corresponding mold body.

3. A universal casting pile head mold for increasing creepage distance according to claim 2, characterized in that: The left mold shell is connected to the right mold shell by bolts.

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