CN212094288U - Low-pressure casting die for transformer transition piece - Google Patents

Abstract

The utility model discloses a low pressure casting die for a transformer transition piece, which structurally comprises an upper die, a lower die and a side die, wherein the upper die, the lower die and the side die form a transformer transition piece die cavity from the upper direction, the lower direction, the left direction and the right direction respectively, a sand core is arranged inside the transformer transition piece die cavity, an air exhaust port is arranged on the upper die, the sand core comprises a first sand core and a second sand core, the first sand core and the second sand core are connected through a binder and are communicated with each other inside, a clamp spring hole is formed on the top chill of the first sand core, an arc-shaped connecting surface is arranged at the joint of the first sand core and the second sand core, an inner compensation port is inwards sunken inside the arc-shaped connecting surface, the inner compensation port is close to the side die, an outer compensation port corresponding to the position of the inner compensation port is formed on the side die, the position of the clamp spring hole corresponds to the position of the air, but also ensures the requirements of the use strength and the compactness of the casting.

Description

Low-pressure casting die for transformer transition piece

The technical field is as follows:

the utility model belongs to the technical field of the low pressure casting technique and specifically relates to a low pressure casting mould for mutual-inductor transition piece

Background art:

the core casting of the inverted oil-immersed current transformer of the transformer transition piece has extremely strict quality requirements, and due to the complex structure, in the low-pressure casting process, an independent sand core hardly ensures the complete forming of the transformer transition piece.

The utility model has the following contents:

the utility model aims at providing a low pressure casting mould for mutual-inductor transition solves one or more among the above-mentioned prior art problem.

In order to solve the technical problem, the utility model provides a low pressure casting mould for mutual-inductor transition, its structure includes mould, lower mould and side forms, goes up mould, lower mould and side forms four directions formation mutual-inductor transition die cavities about from respectively, and the inside of mutual-inductor transition die cavity is equipped with the psammitolite, and its innovation point lies in: the upper die is provided with an air suction opening, the sand core comprises a first sand core and a second sand core, the first sand core and the second sand core are connected through a binder and are communicated with each other inside, a clamp spring hole is formed in the top cold iron of the first sand core, an arc-shaped connecting surface is arranged at the connecting position of the first sand core and the second sand core, an inner compensation opening is inwards sunken in the arc-shaped connecting surface, the inner compensation opening is close to the side die, an outer compensation opening corresponding to the inner compensation opening in position is formed in the side die, and the position of the clamp spring hole corresponds to the position of the air suction opening.

Furthermore, the first sand core is a cylindrical body, the second sand core is a conical body, and the top of the narrow surface of the conical body is bonded with the side surface of the cylindrical body.

Furthermore, a post-pouring surface is arranged at the bottom of the clamp spring hole, and the post-pouring surface is in a long strip shape and is positioned inside the top of the first sand core.

Furthermore, the external compensation opening is in a hook shape.

The beneficial effects of the utility model reside in that: the utility model provides a low pressure casting mould for mutual-inductor transition piece through setting up the psammitolite into first psammitolite and second psammitolite, is favorable to forming complete mutual-inductor transition piece, and the junction of two psammitolites establishes to the arc simultaneously and has guaranteed the fashioned compactness of mutual-inductor transition piece, and the simultaneous feeding of interior throat and outer throat has guaranteed the use strength after the mutual-inductor transition piece shaping simultaneously.

Description of the drawings:

fig. 1 is a schematic side view of the present invention.

Fig. 2 is a front view of the sand core of the present invention.

The specific implementation mode is as follows:

in order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

Fig. 1 to 2 show an embodiment of the present invention, which comprises an upper mold 1, a lower mold 2, a side mold 3, an upper mold 1, the lower die 2 and the side die 3 form a transformer transition piece cavity 4 from four directions of up, down, left and right, respectively, a sand core 5 is arranged in the transformer transition piece cavity 4, an extraction opening 11 is formed in the upper die 1, the sand core 5 comprises a first sand core 51 and a second sand core 52, the first sand core 51 and the second sand core 52 are connected through a binder and communicated with each other, a clamp spring hole 6 is formed in the top chill of the first sand core 51, an arc-shaped connecting surface 7 is arranged at the connecting position of the first sand core 51 and the second sand core 52, an inner compensation opening 71 is formed in the arc-shaped connecting surface 7 in a concave mode, the inner compensation opening 71 is close to the side die 3, an outer compensation opening 72 corresponding to the inner compensation opening 71 is formed in the side die 3, and the position of the clamp spring hole 6 corresponds to the position of the extraction opening.

The utility model discloses, the mutual-inductor transition piece belongs to the spare part that the structure is complicated, and two psammitolites are adopted to psammitolite 5: the first sand core 51 and the second sand core 52 are beneficial to splicing of the transformer transition piece so as to form a complete transformer transition piece, when the first sand core 51 is connected with the second sand core 52, the arc-shaped connecting surface 7 is arranged, the radian formed by the arc-shaped connecting surface 7 is beneficial to the circulation of gas between the first sand core 51 and the second sand core 52, so that the gas in the second sand core 52 can smoothly flow to the first sand core 51 in the forming process of the transformer transition piece, bubbles generated in a casting are avoided, the gas discharged from the interior of the sand core 5 flows out of the clamp spring hole 6 and is discharged out of the transformer transition cavity 4 along the air suction opening 11, the forming compactness of the transformer transition piece is ensured, particularly, the clamp spring hole 6 is formed through a cold iron, the quality of a subsequent machined surface is ensured, and in and out compensation of the inner compensation opening 71 and the outer compensation opening 72 is carried out on the arc-shaped connecting surface 7 in the forming process of the transformer transition piece, the thickness of the arc-shaped connecting surface 7 is increased, so that the use strength of the transformer transition piece after molding is further improved.

In the utility model discloses in, for concrete description first psammitolite 51 and the concrete connection between the second psammitolite 52, above-mentioned first psammitolite 51 is the tube-like body, and second psammitolite 52 is the cone, and the top of cone leptoprosopy and the side of tube-like body bond mutually, according to the structure of mutual inductor transition piece, cylinder is selected to first psammitolite 51, and second psammitolite 52 selects the cone, and the side and the cone leptoprosopy top of cylinder link to each other and form complete mutual inductor transition piece.

The utility model discloses in, because jump ring hole 6 is the external junction of mutual-inductor transition piece, need guarantee the compactness of jump ring hole 6 positions, the bottom of above-mentioned jump ring hole 6 is equipped with the face 61 of watering of moisturizing, the face 61 of watering of moisturizing is rectangular shape and is located the inside at first psammitolite 51 top, the face 61 of watering will be replenished and the inside of setting at first psammitolite 51 top is watered, when not influencing original first psammitolite 51 structure, additionally increase the face 61 of watering of moisturizing in the bottom of jump ring hole 6, the feeding effect of jump ring hole 6 positions has been increased, the casting face of forming in first psammitolite 51 positions has been avoided taking place the shrinkage porosity gas leakage.

The utility model discloses in, in order to further improve the feeding effect of outside benefit throat 72, above-mentioned outside benefit throat 72 is and colludes the form, the design that outside benefit throat 72 colluded the form has improved outside benefit throat 72 and has connected the feeding effect of 7 positions at the arc, the compactness that 7 positions of face formed is connected to the arc has been improved, it needs to explain very much, after mutual-inductor transition piece complete forming, need cut the feeding face that outside benefit throat 72 formed and polish, thereby obtain complete mutual-inductor transition piece, and the waste material after the cutting can recycle again.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. The utility model provides a low pressure casting mould for mutual-inductor transition, its structure includes mould (1), lower mould (2) and side forms (3), go up mould (1) lower mould (2) and side forms (3) respectively form mutual-inductor transition die cavity (4) from four directions about from top to bottom, the inside of mutual-inductor transition die cavity (4) is equipped with psammitolite (5), its characterized in that: the sand core forming die is characterized in that an air extraction opening (11) is formed in the upper die (1), the sand core (5) comprises a first sand core (51) and a second sand core (52), the first sand core (51) and the second sand core (52) are connected through a binder and are communicated with each other inside, a clamp spring hole (6) is formed in the top chill of the first sand core (51), an arc-shaped connecting surface (7) is arranged at the connecting position of the first sand core (51) and the second sand core (52), an inner compensation opening (71) is formed in the arc-shaped connecting surface (7) inwards in a sunken mode, the inner compensation opening (71) is close to the side die (3), an outer compensation opening (72) corresponding to the inner compensation opening (71) in position is formed in the side die (3), and the position of the clamp spring hole (6) corresponds to the position of the air extraction opening (11).

2. The low-pressure casting mold for the transformer transition piece according to claim 1, wherein: the first sand core (51) is a cylindrical body, the second sand core (52) is a conical body, and the top of the narrow surface of the conical body is bonded with the side surface of the cylindrical body.

3. The low-pressure casting mold for the transformer transition piece according to claim 1, wherein: and a supplementing surface (61) is arranged at the bottom of the clamp spring hole (6), and the supplementing surface (61) is long-strip-shaped and is positioned inside the top of the first sand core (51).

4. The low-pressure casting mold for the transformer transition piece according to claim 1, wherein: the external mending orifice (72) is in a hook shape.

Images