CN218826649U - Terminal plate mould for casting coil and casting coil - Google Patents

Abstract

The application relates to the technical field of molds, and provides a terminal plate mold for casting a coil and the casting coil, wherein the terminal plate mold comprises a plate component and a socket mold; the plate assembly comprises a molding end plate for casting the terminal plate, and the socket mold comprises a socket outer mold, a socket inner mold and a terminal mold; the outer die of the steamed corn bread is connected with the forming end plate, the outer die of the steamed corn bread is provided with a cylindrical cavity, and the inner wall of the outer die of the steamed corn bread is provided with an annular groove or an annular boss; the socket inner die is nested in the cylindrical cavity of the socket outer die and surrounds the inner wall of the socket outer die to form a socket pouring cavity for forming the umbrella skirt-shaped socket head part of the terminal socket. Set up annular groove or cyclic annular boss through the inner wall at the die outside the steamed corn bread to through the full skirt form steamed corn bread portion of steamed corn bread pouring chamber cast moulding terminal steamed corn bread, increased the creepage distance of terminal steamed corn bread, make the coil can bear higher applied voltage. The electrical performance of the product is obviously improved.

Description

Terminal plate mould for casting coil and casting coil

Technical Field

The utility model belongs to the technical field of the mould, concretely relates to terminal block mould and pouring coil for pouring coil.

Background

The epoxy pouring type dry transformer is widely applied due to the advantages of excellent technical performance, reasonable price, small maintenance amount and the like. The resin casting process must rely on a mold and adopt special casting equipment to cast and mold the coil in a vacuum state, and generally includes non-filler resin casting and filler resin casting. The existing dry type transformer casting mold includes a coil mold for molding a coil and a terminal plate mold for molding a terminal plate, wherein the terminal plate mold and the coil mold are used together because the coil and the terminal plate of the dry type transformer are integrally molded structures that are cast simultaneously.

The transformer is influenced by rated voltage and external environmental factors, such as wet weather, dirt and dust on the surface of an insulator and the like, and the phenomenon of electric arc creepage of hydrology samples is generated on the surface of a coil. In order to ensure the reliable operation of the transformer, in the medium with the same voltage class, the smaller the creepage distance is, the lower the flashover voltage the transformer can bear under the same environmental conditions. The creepage distance of the terminal socket head formed by the terminal board die for the conventional cast coil in the prior art is generally smaller, so that the electrical performance of the product is poorer.

In summary, how to effectively solve the problems that the transformer coil is easy to generate creepage, so that the electrical performance of the product is poor, and the like, is a problem that needs to be solved urgently by those skilled in the art at present.

SUMMERY OF THE UTILITY MODEL

To the problem among the above-mentioned prior art, the utility model provides a terminal block mould and pouring coil for pouring coil to solve current transformer coil and easily produce creepage phenomenon and make the relatively poor problem of product electrical property.

In a first aspect, the utility model provides a terminal plate mould for casting coils, which comprises a plate component and a socket mould; the plate assembly comprises a molding end plate for molding the terminal plate by casting, and a casting channel is arranged on the molding end plate; a socket die for casting and molding a terminal socket is arranged on the molding end plate and comprises a socket outer die, a socket inner die and a terminal die; the outer die of the steamed corn bread is connected with the forming end plate, the outer die of the steamed corn bread is provided with a cylindrical cavity, and the inner wall of the outer die of the steamed corn bread is provided with an annular groove or an annular boss; the socket head inner die is nested in the cylindrical cavity of the socket head outer die and surrounds the inner wall of the socket head outer die to form a socket head pouring cavity for forming an umbrella skirt-shaped socket head part of the terminal socket head; the terminal mould sets up the bottom of die in the steamed corn bread, and is provided with the terminal pouring chamber that is used for the terminal portion of the pouring shaping terminal steamed corn bread, terminal pouring chamber with steamed corn bread pouring chamber intercommunication, steamed corn bread pouring chamber with the pouring passageway intercommunication.

Furthermore, the outer die of the steamed corn bread comprises at least two detachable arc-shaped sheets, and the at least two arc-shaped sheets are spliced to form the outer die of the steamed corn bread with a cylindrical cavity inside.

The detachable arc-shaped piece is arranged on the socket head outer die, so that the die is convenient to detach, and the forming effect of the umbrella skirt-shaped socket head part is ensured.

Furthermore, a first connecting wing plate is arranged on the outer wall or the bottom end of each arc-shaped sheet and connected with the forming end plate.

Further, the socket inner die comprises a forming pipe, a second connecting wing plate and a bottom sealing plate; the forming tube is of a round tube structure, the top end of the forming tube is provided with the second connecting wing plate, the second connecting wing plate is connected with the top end of the socket outer die and sealed, the bottom end of the forming tube is provided with the bottom sealing plate, the communicating hole is formed in the bottom sealing plate, the terminal die is arranged on the bottom sealing plate, and the terminal pouring cavity is communicated with the socket pouring cavity through the communicating hole.

Further, the socket die further comprises a die mounting plate, and the die mounting plate is connected with the forming end plate and the socket outer die.

Further, the socket head die further comprises a sealing base plate, the sealing base plate is located between the die mounting plate and the forming end plate, the sealing base plate is right opposite to the end face of the die mounting plate is arranged on the pouring channel, the die mounting plate is provided with a sealing ring embedded in the sealing groove, and the sealing base plate is provided with a sealing ring embedded in the pouring channel.

The sealing ring through the sealing base plate realizes the seamless butt joint of the pouring channel of the forming end plate and the pouring channel, and the matching of the sealing groove and the sealing ring ensures the communicated sealing performance of the pouring channel and the socket head pouring cavity, so that the pouring material is prevented from overflowing and the pouring quality is prevented from being influenced.

Furthermore, the molding end plate comprises a first end plate and a second end plate which are spliced with each other, and the casting channel is divided by a splicing seam of the first end plate and the second end plate.

Through setting up the shaping end plate into first end plate and the second end plate that the split can splice, be convenient for tear open the mould, improve production efficiency.

Further, the panel assembly also includes a plurality of reinforcing ribs distributed on the first end panel and the second end panel.

The structural strength and rigidity of the first end plate and the second end plate are improved through the reinforcing rib plates, stress deformation of the first end plate and the second end plate is avoided, and the casting quality is guaranteed.

Further, the panel assembly also includes a reinforcement connector that connects the reinforcement ribs on the first and second end panels.

The reinforcing rib plates on the first end plate and the second end plate are connected through the reinforcing connecting pieces, so that the structural strength and rigidity of the plate assembly can be improved, the splicing sealing effect of the first end plate and the second end plate can be improved, and the casting molding quality is guaranteed.

The utility model discloses a pouring terminal plate mould for coil's beneficial effect is: set up annular groove or cyclic annular boss through the inner wall at the die outside the steamed corn bread to through the full skirt form steamed corn bread portion of steamed corn bread pouring chamber cast moulding terminal steamed corn bread, increased the creepage distance of terminal steamed corn bread, make the coil can bear higher applied voltage. When the coil surface is polluted, the coil can bear higher flashover voltage under the same condition, and the electrical performance of the product is further improved remarkably.

In a second aspect, the utility model provides a pouring coil, including the terminal block and with the terminal nest head that the terminal block is connected, the terminal nest head includes integrated casting's terminal portion and umbellate skirt form nest head portion, the terminal portion is located the inside of umbellate skirt form nest head portion, the outside of umbellate skirt form nest head portion has annular groove or annular boss.

The utility model discloses a pouring coil's beneficial effect is: the annular groove or the annular boss is arranged outside the head part of the umbrella skirt-shaped socket, so that the creepage distance of the terminal socket head is increased, and the coil can bear higher applied voltage. When the coil surface is polluted, the coil can bear higher flashover voltage under the same condition, and the electrical performance of the product is further improved remarkably.

Drawings

Fig. 1 is the utility model discloses the spatial structure sketch map of terminal plate mould for the pouring coil.

Fig. 2 is a schematic structural view of the first end plate of the hidden forming end plate in fig. 1 and a socket outer die.

Fig. 3 is a schematic structural view of fig. 2 after hiding a socket inner mold and an arc-shaped sheet outside the socket inner mold.

Fig. 4 is a perspective view from below illustrating the mold mounting plate and the sealing pad plate of fig. 3.

Fig. 5 is a schematic perspective view of the hidden socket inner mold, the hidden socket outer mold and the hidden terminal mold in fig. 3.

In the figure: 10-forming an end plate; 11-a first end plate; 12-a second end plate; 20-a pouring channel; 30-a reinforcing rib plate; 40-a reinforcing connector; 50-a steamed corn bread outer mold; 51-an annular groove; 52-annular boss; 53-arc piece; 54-a first connection wing; 60-a steamed corn bread inner mould; 61-a forming tube; 62-a second connection wing panel; 63-sealing the bottom plate; 70-terminal mold; 71-terminal casting cavity; 80-a mold mounting plate; 81-sealing ring; 90-sealing the base plate; 91-sealing ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1 to 5 and the specific embodiments.

A terminal plate mold for a cast coil as shown in fig. 1-3 includes a plate assembly and a socket mold.

The plate assembly comprises a molding end plate 10 for casting the terminal plate, and a casting channel 20 is arranged on the molding end plate 10; the molding end plate 10 is provided with a socket mold for casting a terminal socket. Two circular pouring channels 20 are arranged on the forming end plate 10, and each pouring channel 20 corresponds to a socket die. In some embodiments, more pouring channels 20 are provided on the forming end plate 10, and each pouring channel 20 is provided with a corresponding socket mold, and the number of pouring channels 20 is not limited to two. Of course, the two or more channels 20 should be spaced apart, as should the terminal dimples cast from the corresponding dimple mold.

The forming end plate 10 is made of channel steel, and the channel steel is cut in the center of the width direction of the channel steel along the length direction of the channel steel and is divided into two parts.

As shown in fig. 1 and 2, the formed end plate 10 includes a first end plate 11 and a second end plate 12 which are spliced in the width direction, and the splicing seam of the first end plate 11 and the second end plate 12 divides the pouring channel 20. The first end plate 11 and the second end plate 12 can also be regarded as L-shaped steel strip plates, and the first end plate 11 and the second end plate 12 are spliced to form a channel steel with a U-shaped cross section.

In order to increase the structural strength and rigidity of the profiled end panel 10, the panel assembly further comprises a plurality of reinforcing ribs 30, the plurality of reinforcing ribs 30 being distributed over the first end panel 11 and the second end panel 12. That is, the reinforcement ribs 30 provided upright are welded to the first end plate 11 and the second end plate 12, respectively, and preferably, the reinforcement ribs 30 of the first end plate 11 and the second end plate 12 are abutted against each other.

And reinforcing rib plates 30 are respectively arranged on two sides of the plate component corresponding to the socket dies.

The panel assembly further comprises a reinforcing connector 40, which reinforcing connector 40 connects the reinforcing floor 30 on the first end panel 11 and the second end panel 12. Two reinforcing floor 30 of butt are a set of on first end plate 11 and the second end plate 12, every group reinforcing floor 30 is connected with a reinforcement connection piece 40 respectively in the seam both sides of butt, every reinforcement connection piece 40 is preferably two L type angle steel, two L type angle steel of connection through the bolt one-to-one as same one side of two reinforcing floor 30 of a set of, these two L type angle steel rethread other bolted connection, thereby connect two reinforcing floor 30 as a set of as whole, when the needs form removal, the bolt of detaching connection reinforcement connection piece 40 and reinforcing floor 30 can.

As shown in fig. 2 and 3, the socket mold includes a socket outer mold 50, a socket inner mold 60, and a terminal mold 70.

The socket outer die 50 is connected with the forming end plate 10, the socket outer die 50 is provided with a cylindrical cavity, and the inner wall of the socket outer die is provided with an annular groove 51 or an annular boss 52. The outer die 50 for the steamed corn bread comprises two detachable arc-shaped sheets 53, and the two arc-shaped sheets 53 are spliced to form the outer die 50 for the steamed corn bread with a cylindrical cavity inside. Of course, in some embodiments the socket outer mold 50 includes a plurality of removable arcuate pieces 53, and these arcuate pieces 53 are circumferentially joined end to ultimately enclose the socket outer mold 50 having a cylindrical cavity therein.

The outer wall or the bottom end of each arc-shaped piece 53 is welded with a first connecting wing plate 54, and the first connecting wing plate 54 is connected with the forming end plate 10. In this embodiment, the bottom end of the arc piece 53 is provided with a first connection wing plate 54. The first connection wing plate 54 is an arc-shaped plate which is concentric with the arc-shaped piece 53 and has a different diameter. Each arcuate tab 53 is independently mountable to the formed end plate 10 by a first connector tab 54.

It will be appreciated that the socket outer mold 50 may be considered as a circular tube structure, and thus has a cylindrical cavity formed therein, allowing, of course, a degree of inclination of its inner walls. The intrados of every arc piece 53 should also be provided with arc recess or arc boss, and the length direction of recess or boss all sets up along the arc length direction of arc piece 53, and two arc pieces 53 splice the back mutually, and two arc recesses on two arc pieces 53 splice mutually and form the annular recess of complete circle, or two arc bosses on two arc pieces 53 splice mutually and form the annular boss of complete circle.

The inner wall of the socket outer mold 50 in this embodiment is provided with a plurality of annular grooves 51 or annular projections 52, and the plurality of annular grooves 51 or annular projections 52 are spaced apart in the height direction (also referred to as the axial direction) of the socket outer mold 50.

The socket inner die 60 is nested in the cylindrical cavity of the socket outer die 50 and forms a socket pouring cavity for forming the umbrella skirt-shaped socket head part of the terminal socket by enclosing with the inner wall of the socket outer die 50. After the resin is poured into the socket head pouring cavity, the annular groove 51 or the annular boss 52 arranged on the inner wall of the socket head outer die 50 is used for forming the umbrella skirt structure of the umbrella skirt-shaped socket head. The umbrella skirt-shaped socket head comprises a tubular resin structure, and a plurality of annular grooves 51 or annular bosses 52 are arranged on the outer wall of the tubular resin structure at intervals along the axial direction, and the axial end surfaces of the annular grooves 51 or the annular bosses 52 have a certain gradient, similar to the umbrella skirt shape. The slope is actually for facilitating demolding, and if demolding is not hindered, the slope may not be provided.

Terminal mould 70 sets up the bottom at die 60 in the steamed corn bread, and terminal mould 70 is provided with the terminal pouring chamber 71 that is used for the terminal portion of the pouring shaping terminal steamed corn bread, and terminal pouring chamber 71 and steamed corn bread pouring chamber intercommunication, steamed corn bread pouring chamber and pouring channel 20 intercommunication.

Terminal mould 70 can be regarded as hollow round platform column structure, and its inside cavity constitutes terminal pouring chamber 71 promptly, and the bottom of terminal mould 70 is big head end, and the top is little head end, and the bottom sets up to uncovered to with the bottom welding of die 60 in the steamed corn bread, realize the intercommunication in terminal pouring chamber 71 and steamed corn bread pouring chamber. It should be noted that, in the present embodiment, both the top end and the bottom end are referred to the reference view of fig. 1, and are not necessarily applicable to the actual casting orientation of the mold.

The socket inner die 60 comprises a forming pipe 61, a second connecting wing plate 62 and a bottom sealing plate 63; the forming tube 61 is a circular tube structure, and of course, the outer diameter of the forming tube 61 is smaller than the diameter of the cylindrical cavity of the socket outer mold 50, so that the outer wall of the forming tube 61 and the inner arc surface of the arc piece 53 of the socket outer mold 50 maintain a distance, the distance can be regarded as the thickness of the shed-shaped socket part (except for the annular groove 51 or the annular boss 52) formed by casting, the top end of the shed-shaped socket part is provided with a second connecting wing plate 62, the second connecting wing plate 62 is connected and sealed with the top end of the socket outer mold 50 through a bolt, that is, the second connecting wing plate 62 is erected at the top end of the socket outer mold 50 and connected through a bolt. Bolt holes are formed in advance in the top ends of the second connecting wing plate 62, the first connecting wing plate 54 and the socket outer die 50. The bottom end of the forming tube 61 is provided with a bottom sealing plate 63, the bottom sealing plate 63 and the forming tube 61 are of an integral structure, and the bottom end of the forming tube 61 is a closed end under the action of the bottom sealing plate 63. The bottom sealing plate 63 is provided with a communication hole, the terminal mold 70 is arranged on the bottom sealing plate 63 corresponding to the communication hole, and the terminal pouring cavity 71 is communicated with the socket head pouring cavity through the communication hole. The terminal mold 70 of this embodiment is a hollow circular truncated cone-shaped structure, the large head end of the bottom of the terminal mold is welded to the bottom sealing plate 63, and the terminal mold 70 is located on the side of the bottom sealing plate 63 opposite to the forming end plate 10. The small end of the terminal mold 70 is provided with a through hole which is temporarily closed by a plug fitted thereto when the casting work is performed.

It should be noted that there may be a plurality of terminal molds 70 disposed on the bottom cover plate 63 of the socket inner mold 60, and the distribution rule of the plurality of terminal molds 70 on different socket inner molds 60 may be different.

As shown in fig. 4 and 5, the socket mold further includes a mold mounting plate 80 and a seal pad 90. The die mounting plate 80 is a circular ring plate having an outer wall that is correspondingly cut down to accommodate the size of the formed end plate 10. The first connection wing plate 54, the mold mounting plate 80, the seal packing plate 90 and the forming end plate 10 are sequentially stacked from top to bottom. Bolt holes can be arranged in advance on the die mounting plate 80 and the sealing cushion plate 90, and the sequential connection of the first connecting wing plate 54, the die mounting plate 80, the sealing cushion plate 90 and the forming end plate 10 from top to bottom is realized through bolts, and of course, the sequential connection is not completed by one bolt.

The sealing pad plate 90 is located between the mold mounting plate 80 and the forming end plate 10, an annular sealing groove is arranged on the end face, facing the mold mounting plate 80, of the sealing pad plate 90 along the pouring channel 20, an annular sealing ring 81 embedded into the sealing groove is arranged on the mold mounting plate 80, a sealing ring 91 embedded in the pouring channel 20 is arranged on the sealing pad plate 90, the sealing ring 91 is a part of the sealing pad plate 90, and the sealing ring 91 and the sealing pad plate are of an integrated forming structure.

In some embodiments, the seal pad 90 is formed by two semicircular plates, and one semicircular plate is disposed on each of the first end plate 11 and the second end plate 12. And the mold mounting plate 80 is a unitary plate. In addition to the sealing ring 81, a sealing structure is also provided between the arc-shaped pieces 53 of the socket head outer mold 50, for example, a vertical groove (or called as an axial groove) is provided at an end of each arc-shaped piece 53 in the arc length direction, and a rubber strip is embedded in the vertical groove to realize the sealing of the two arc-shaped pieces 53 which are spliced together. Or, the vertical groove and the rubber strip may be provided on the splicing end face of any one of the two arc-shaped pieces 53 at the splicing seam where the two arc-shaped pieces 53 are spliced together.

The terminal board mould for pouring coil of this embodiment sets up annular groove or cyclic annular boss through the inner wall at the outer mould of steamed corn bread to through the full skirt form steamed corn bread portion of steamed corn bread pouring chamber cast moulding terminal steamed corn bread, increased the creepage distance of steamed corn bread of terminal, make the coil can bear higher applied voltage, improve the withstand voltage performance of product. When the surface of the coil is polluted, the coil can bear higher flashover voltage under the same condition, and the electrical performance of the product is further remarkably improved.

In addition, because the terminal pouring cavity 71 is communicated with the socket head pouring cavity, and the socket head pouring cavity is communicated with the pouring channel 20, the terminal part of the terminal socket head and the umbrella skirt-shaped socket head are integrally poured and molded, and the production efficiency is improved while the electrical performance is met.

The terminal plate mold for casting the coil is used in cooperation with the coil mold for casting the coil body, and the coil mold and a method for using the coil mold in cooperation with the coil mold belong to the prior art, so that the description is omitted in this embodiment.

Based on the same inventive concept, the utility model also provides a casting coil, including terminal block and the terminal nest head of being connected with the terminal block, the terminal nest head includes integrated casting's terminal portion and full skirt form nest head, and the terminal portion is located the inside of full skirt form nest head, and the outside of full skirt form nest head has cyclic annular recess or cyclic annular boss. The terminal socket of the cast coil of the embodiment is cast by using the terminal plate mold for cast coil of any one of the above embodiments. The terminal part and the umbrella-skirt-shaped socket head part which are molded by casting integrally increase the creepage distance of the terminal socket head, so that the coil can bear higher applied voltage, and the voltage tolerance performance of the product is improved.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that a person skilled in the art should also recognize that several modifications and decorations can be made without departing from the principle of the present invention, and the protection scope of the present invention is also covered.

Claims (10)

1. A terminal plate mould for casting coils is characterized by comprising a plate assembly and a socket mould; the plate assembly comprises a molding end plate for molding the terminal plate by casting, and a casting channel is arranged on the molding end plate; a socket head mold for casting and molding a terminal socket head is arranged on the molding end plate and comprises a socket head outer mold, a socket head inner mold and a terminal mold; the outer die of the steamed corn bread is connected with the forming end plate, the outer die of the steamed corn bread is provided with a cylindrical cavity, and the inner wall of the outer die of the steamed corn bread is provided with an annular groove or an annular boss; the socket head inner die is nested in the cylindrical cavity of the socket head outer die and forms a socket head pouring cavity for forming an umbrella skirt-shaped socket head part of the terminal socket head with the inner wall of the socket head outer die in an enclosing manner; the terminal mould sets up the bottom of die in the steamed corn bread, and be provided with the terminal pouring cavity that is used for the terminal part of the steamed corn bread of cast moulding terminal, terminal pouring cavity with steamed corn bread pouring cavity intercommunication, steamed corn bread pouring cavity with the pouring channel intercommunication.

2. The terminal plate mold for casting a coil according to claim 1, wherein the socket outer mold comprises at least two arc-shaped pieces which are separable, and the at least two arc-shaped pieces are spliced to form the socket outer mold with a cylindrical cavity inside.

3. The terminal plate mold for casting a coil according to claim 2, wherein a first connection wing plate is provided at an outer wall or a bottom end of each of the arc-shaped pieces, the first connection wing plate being connected to the molding end plate.

4. The terminal plate mold for casting a coil according to claim 1, wherein the socket inner mold includes a forming tube, a second connection wing plate, and a back cover plate; the forming tube is of a round tube structure, the top end of the forming tube is provided with the second connecting wing plate, the second connecting wing plate is connected with the top end of the socket outer die and sealed, the bottom end of the forming tube is provided with the bottom sealing plate, the communicating hole is formed in the bottom sealing plate, the terminal die is arranged on the bottom sealing plate, and the terminal pouring cavity is communicated with the socket pouring cavity through the communicating hole.

5. The terminal plate mold for a cast coil according to claim 1, wherein the socket mold further comprises a mold mounting plate connecting the forming end plate and the socket outer mold.

6. The terminal plate mold for a pouring coil according to claim 5, wherein the socket head mold further comprises a seal plate located between the mold mounting plate and the forming end plate, wherein a seal groove is provided along the pouring passage at an end surface of the seal plate facing the mold mounting plate, a seal ring embedded in the seal groove is provided on the mold mounting plate, and a seal ring nested in the pouring passage is provided on the seal plate.

7. The terminal plate mold for a pouring coil according to claim 1, wherein the molding end plate includes a first end plate and a second end plate that are joined together, and the joint seam of the first end plate and the second end plate divides the pouring passage.

8. The terminal plate mold for a casting coil according to claim 7, wherein the plate assembly further comprises a plurality of reinforcing ribs distributed on the first end plate and the second end plate.

9. The terminal plate mold for a cast coil according to claim 8, wherein the plate assembly further comprises a reinforcing connector connecting the reinforcing ribs on the first and second end plates.

10. A cast coil comprises a terminal board and a terminal socket head connected with the terminal board, and is characterized in that the terminal socket head comprises a terminal part and an umbrella-skirt-shaped socket head part which are integrally cast, the terminal part is positioned inside the umbrella-skirt-shaped socket head part, and the outer part of the umbrella-skirt-shaped socket head part is provided with an annular groove or an annular boss.

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