Three-phase five-column voltage transformer APG forming die for ring main unit

Abstract

The utility model relates to the technical field of three-phase five-column voltage transformer forming, and discloses a three-phase five-column voltage transformer APG forming die for a ring main unit, which comprises a transformer cavity, the front side of the transformer cavity is movably clamped with a middle cavity, the front side of the middle cavity is clamped with a column bottom cavity, and the front side of the column bottom cavity is clamped with a column bottom cavity. The middle cavity and the column body bottom cavity are each provided with an upper half and a lower half, a front cavity is clamped to the front side of the column body bottom cavity, and a top plate is movably clamped to the tops of the mutual inductor cavity, the middle cavity, the column body bottom cavity and the front cavity. According to the difference of the size of a voltage transmission column and the size of a zero-sequence magnetic flux column, the splitting demolding modes of a phase line column cavity mold and a zero-sequence column cavity mold are distinguished, when materials are injected into a mutual inductor cavity, the materials can push the side wall of a guide rail assembly to gradually extend outwards, and therefore the formed corner portions of a mutual inductor are guided and protected; and not only can the good shape and integrity of the corners of the formed mutual inductor be ensured, but also the overall quality and performance of the mutual inductor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase five-column voltage transformer molding, in particular to a three-phase five-column voltage transformer APG molding die for a ring network cabinet. Background Art

[0002] In a three-phase five-column voltage transformer, the three columns used to transmit three-phase voltage are generally called "phase line columns" or "voltage transmission columns", which are responsible for transmitting the voltage of the three-phase power supply to the internal winding of the transformer, and the columns used for zero-sequence flux are generally called "zero-sequence flux columns" or "zero-sequence columns". Zero-sequence flux refers to the flux corresponding to the zero-sequence current generated when the three-phase current is unbalanced in a three-phase system. The function of the zero-sequence flux column is to provide a path for the zero-sequence flux to ensure that the transformer can work correctly when the zero-sequence current exists.

[0003] The molding process of the three-phase five-column voltage transformer is to inject molten plastic or rubber material into the mold so that it is formed at the corners of the outer wall of the transformer. However, during the injection process, if the stress at the corners is more concentrated than other parts, this stress concentration may make these corners more prone to deformation, and may even cause cracks or fractures. These problems will not only affect the appearance quality of the transformer, but may also have a negative impact on its performance and reliability. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the phase line column and zero-sequence flux column of the three-phase five-column voltage transformer play an important role, and the stress concentration at the corners during the molding process may affect the appearance and performance. The utility model provides a three-phase five-column voltage transformer APG molding die for a ring network cabinet.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] A three-phase five-column voltage transformer APG molding die for a ring network cabinet comprises a transformer cavity, the front side of the transformer cavity is movably connected with a middle cavity, the front side of the middle cavity is movably connected with a column bottom cavity, the middle cavity and the column bottom cavity are both provided with an upper and lower halves, the front side of the column bottom cavity is movably connected with a front cavity, the transformer cavity, the middle cavity, the column bottom cavity and the top of the front cavity are movably connected with a top plate, the side wall of the top plate is provided with a plurality of pieces according to the positions of the transformer cavity, the middle cavity, the column bottom cavity and the front cavity, and the size of the top plate is determined according to the position of the transformer cavity, the middle cavity, the column bottom cavity and the front cavity. The transformer cavity is divided according to the top dimensions of the cavity, the middle cavity, the column bottom cavity and the front cavity. The transformer cavity includes a cavity and a card block. The card block is fixedly connected to the front end of the transformer cavity. A combination of phase column cavity molds is fixedly connected to the top of the top plate between the transformer cavity and the middle cavity. A combination of zero-sequence column cavity molds is fixedly connected to the top of the top plate at the top of the column bottom cavity and the front cavity. A guide rail assembly is provided at the inner sharp corner of the transformer cavity, and the outer end of the guide rail assembly is fixedly connected to the inner sharp corner of the transformer cavity.

[0007] Furthermore, the front ends of the cavity, the middle cavity and the column bottom cavity are all provided with card blocks, and the rear sides of both ends of the middle cavity, the column bottom cavity and the front cavity are all provided with card grooves corresponding to the position of the card blocks, which are fixed in the inner cavity part of the cavity, and then the cavity, the middle cavity, the column bottom cavity and the front cavity are plugged together through the card blocks.

[0008] Furthermore, the phase line column cavity mold includes a pouring port, an upper circle cavity, a base cavity and an insertion rod. The bottom of the base cavity is divided into multiple halves. The bottom of the base cavity located at the rear half is movably connected to the front end of the top side of the top plate connected to the top side of the transformer cavity, and the bottom of the base cavity located at the front half is movably connected to the rear end of the top side of the top plate connected to the top of the middle cavity. The side walls of the entire phase line column cavity mold are first split apart to the surroundings, and then the cavity and the middle cavity are split apart.

[0009] Furthermore, the vertical lines of most of the pouring port, the upper circle cavity and the base cavity are the same, the insertion rod is arranged between the pouring port, the upper circle cavity and the side walls of the base cavity, and the gaps between the pouring port, the upper circle cavity and the side walls of the base cavity are connected by inner and outer circle sliding through the side walls of the insertion rod, the bottom end of the upper circle cavity is fixedly connected to the top end of the base cavity, and the bottom end of the pouring port is fixedly connected to the top end of the upper circle cavity, and the pouring port, the upper circle cavity and the base cavity in the vertical direction can be slidably separated by the insertion rod.

[0010] Furthermore, the zero-sequence column cavity mold includes a top cavity, a middle cavity and a ring cavity. The top cavity, the middle cavity and the ring cavity are all arranged as front and rear halves and snap together. The bottom of the rear half of the ring cavity is fixedly connected to the front end of the top plate connected to the top of the column bottom cavity, and the bottom of the front half of the ring cavity is fixedly connected to the rear end of the top plate connected to the top of the front cavity. After the column bottom cavity and the front cavity are split, the top cavity, the middle cavity and the front and rear halves of the ring cavity can be directly split apart.

[0011] Furthermore, the bottom end of the middle cavity is fixedly connected to the top end of the ring cavity, and the bottom end of the top cavity is fixedly connected to the top end of the middle cavity. The top cavity, the middle cavity and the front and rear halves of the ring cavity are separated to complete smooth demoulding.

[0012] Furthermore, the guide rail assembly includes a guide plate, a connecting plate and a folding frame, the rear end of the connecting plate is fixedly connected to the four corner side walls on the inner side of the cavity, the outer end of the folding frame is fixedly connected to the inner end of the connecting plate, and the side end of the guide plate is fixedly connected to the inner end of the folding frame. The material is gradually squeezed from the middle to the surrounding areas inside the cavity, thereby pushing the side wall of the guide plate, so that the side wall of the guide plate gradually squeezes the side wall of the folding frame toward the outside, and the side wall of the guide plate is gradually pushed by the material to be squeezed toward the connecting plate.

[0013] Compared with the prior art, the utility model provides a three-phase five-column voltage transformer APG forming die for a ring network cabinet, which has the following beneficial effects:

[0014] The ring main unit uses a three-phase five-column voltage transformer APG molding mold. In order to avoid damage to the shape of the column, the splitting and demolding methods of the phase column cavity mold and the zero-sequence column cavity mold can be distinguished according to the difference in the sizes of the voltage transmission column and the zero-sequence magnetic flux column. When the material is injected into the transformer cavity, the material will push the side wall of the guide rail assembly to gradually extend outward, thereby guiding and protecting the formed corners of the transformer. The rounded corners can not only ensure that the corners of the transformer maintain a good shape and integrity after forming, but also improve the overall quality and performance of the transformer. This guidance and protection can also help reduce stress concentration at the corners, extend the service life of the transformer, improve the strength and durability of parts, and reduce the risk of transformer failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The external display diagram for connecting the overall structure of this utility;

[0016] Figure 2 This is a cross-sectional view of the interior of the practical phase line column cavity mold together with the internal structure of the transformer cavity;

[0017] Figure 3This is a top view of the internal structure of the phase line column cavity mold of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection and expansion and contraction of the internal structure of the guide rail assembly of this utility model;

[0019] Figure 5 This is the internal cross-sectional view of the zero-sequence column cavity mold structure of this utility model.

[0020] In the figure: 1. Transformer cavity; 101. Cavity; 102. Block; 2. Middle cavity; 3. Column bottom cavity; 4. Front cavity; 5. Top plate; 6. Phase column cavity mold; 601. Casting port; 602. Upper ring cavity; 603. Base cavity; 604. Insert rod; 7. Zero sequence column cavity mold; 701. Top cavity; 702. Middle cavity; 703. Ring cavity; 8. Guide rail assembly; 801. Guide plate; 802. Connecting plate; 803. Folding frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] like Figure 1-Figure 5 As shown, a three-phase five-column voltage transformer APG molding die for a ring network cabinet includes a transformer cavity 1, a middle cavity 2 is movably connected to the front side of the transformer cavity 1, a column bottom cavity 3 is movably connected to the front side of the middle cavity 2, the middle cavity 2 and the column bottom cavity 3 are both provided with upper and lower halves, a front cavity 4 is movably connected to the front side of the column bottom cavity 3, a top plate 5 is movably connected to the top of the transformer cavity 1, the middle cavity 2, the column bottom cavity 3 and the front cavity 4, a plurality of side walls of the top plate 5 are arranged according to the positions of the transformer cavity 1, the middle cavity 2, the column bottom cavity 3 and the front cavity 4, and the size of the top plate 5 is determined according to the transformer cavity 1. The transformer cavity 1 is divided according to the top sizes of the middle cavity 2, the column bottom cavity 3 and the front cavity 4. The transformer cavity 1 includes a cavity 101 and a block 102. The block 102 is fixedly connected to the front end of the transformer cavity 1. A combination of a phase line column cavity mold 6 is fixedly connected to the top of the top plate 5 between the transformer cavity 1 and the middle cavity 2. The top of the column bottom cavity 3 and the front cavity 4 is fixedly connected to the top of the top plate 5. A guide rail assembly 8 is provided at the internal sharp corner of the transformer cavity 1. The outer end of the guide rail assembly 8 is fixedly connected to the inner sharp corner of the transformer cavity 1.

[0024] like Figure 1-Figure 2As shown, the front ends of the cavity 101, the middle cavity 2 and the column bottom cavity 3 are all provided with a card block 102, and the rear sides of both ends of the middle cavity 2, the column bottom cavity 3 and the front cavity 4 are all provided with a card slot corresponding to the position of the card block 102. After the iron core inside the mutual inductor is wound with wires according to the design requirements and is insulated, it is fixed in the inner cavity of the cavity 101, and then the cavity 101, the middle cavity 2, the column bottom cavity 3 and the front cavity 4 are plugged together through the card block 102, and the molten rubber material is injected into the cavity 101 from the pouring port 601 and the top of the top cavity 701.

[0025] like Figure 1 and Figure 3 As shown, the phase column cavity mold 6 includes a pouring port 601, an upper circle cavity 602, a base cavity 603 and an insertion rod 604. The bottom of the base cavity 603 is divided into two halves. The bottom of the base cavity 603 located at the rear half is movably connected to the top front end of the top plate 5 connected to the top side of the transformer cavity 1, and the bottom of the base cavity 603 located at the front half is movably connected to the top rear end of the top plate 5 connected to the top of the middle cavity 2. The pouring port 601, the upper circle cavity 602 and the base cavity 603 are arranged on the same vertical line. The insertion rod 604 is arranged between the pouring port 601, the upper circle cavity 602 and the side walls of the base cavity 603. The multiple gaps are connected by inner and outer circle sliding connection through the side wall of the insertion rod 604. The bottom end of the upper circle cavity 602 is fixedly connected to the top of the base cavity 603, and the bottom end of the casting port 601 is fixedly connected to the top of the upper circle cavity 602. When cooling and demolding, the column located in the phase column cavity mold 6 is larger. The base cavity 603 is slidable. The side wall of the entire phase column cavity mold 6 is first split to the surrounding, and then the cavity 101 and the middle cavity 2 are split. The casting port 601, the upper circle cavity 602 and the base cavity 603 in the vertical direction can be slidably split by the insertion rod 604, thereby protecting the shape of the voltage transmission column formed inside the phase column cavity mold 6.

[0026] Embodiment 2:

[0027] like Figure 1 and Figure 5As shown, the zero-sequence column cavity mold 7 includes a top cavity 701, a middle cavity 702 and a ring cavity 703. The top cavity 701, the middle cavity 702 and the ring cavity 703 are all arranged as front and rear halves and snap together. The bottom of the rear half of the ring cavity 703 is fixedly connected to the front end of the top plate 5 connected to the top of the column bottom cavity 3, the bottom of the front half of the ring cavity 703 is fixedly connected to the rear end of the top plate 5 connected to the top of the front cavity 4, the bottom end of the middle cavity 702 is fixedly connected to the top of the ring cavity 703, the bottom end of the top cavity 701 is fixedly connected to the top of the middle cavity 702, and the splitting of the zero-sequence column cavity mold 7, after the splitting between the column bottom cavity 3 and the front cavity 4, can directly drive the top cavity 701, the middle cavity 702 and the front and rear halves of the ring cavity 703 to be split apart, and smooth demoulding can be completed.

[0028] Embodiment three:

[0029] like Figure 1 and Figure 4 As shown, the guide rail assembly 8 includes a guide plate 801, a connecting plate 802 and a folding frame 803. The rear end of the connecting plate 802 is fixedly connected to the four corner side walls on the inner side of the cavity 101, the outer end of the folding frame 803 is fixedly connected to the inner end of the connecting plate 802, and the side end of the guide plate 801 is fixedly connected to the inner end of the folding frame 803. The material is gradually squeezed from the middle to the surrounding inside the cavity 101, thereby pushing the side wall of the guide plate 801, so that the side wall of the guide plate 801 gradually squeezes the side wall of the folding frame 803 toward the outside, and the side wall of the guide plate 801 is gradually pushed by the material to squeeze toward the connecting plate 802, and gradually extends to the outer circle of the internal space of the entire transformer cavity 1, the middle cavity 2, the column bottom cavity 3 and the front cavity 4, reducing the uneven shape of the corners.

[0030] Working principle: Figure 1-Figure 5 As shown, the iron core inside the transformer is wound with wires according to the design requirements, and after being treated with insulation and the like, it is fixed in the inner cavity of the cavity 101, and then the cavity 101, the middle cavity 2, the column bottom cavity 3 and the front cavity 4 are plugged together through the block 102, and the molten rubber material is injected into the cavity 101 from the pouring port 601 and the top of the top cavity 701. Through the extrusion of the injected material, the material is gradually extruded from the middle to the surrounding inside the cavity 101, thereby pushing the side wall of the guide plate 801, so that the side wall of the guide plate 801 gradually presses the side wall of the folding frame 803 outward, and the side wall of the guide plate 801 is gradually pushed by the material to be extruded toward the connecting plate 802, and gradually extends to the outer circle to the internal space of the entire transformer cavity 1, the middle cavity 2, the column bottom cavity 3 and the front cavity 4, thereby reducing the uneven shape of the edges and corners;

[0031] When the mold is cooled and demoulded, the column located at the phase column cavity mold 6 is relatively large. The base cavity 603 is slidable. The side wall of the entire phase column cavity mold 6 is first split to the surroundings, and then the cavity 101 and the middle cavity 2 are split. The vertical pouring port 601, the upper ring cavity 602 and the base cavity 603 can be slid and split by the insertion rod 604, thereby protecting the shape of the voltage transmission column formed inside the phase column cavity mold 6.

[0032] The splitting of the zero-sequence column cavity mold 7 can directly drive the top cavity 701, the middle cavity 702 and the front and rear halves of the ring cavity 703 to be split apart after the column bottom cavity 3 and the front cavity 4 are split, so that the side wall of the zero-sequence magnetic flux column can be smoothly demoulded;

[0033] The middle cavity 2 and the column bottom cavity 3 are both divided into two pieces, the upper and lower ends. The lower halves of the middle cavity 2 and the column bottom cavity 3 can be split, and then the tops of the middle cavity 2 and the column bottom cavity 3 can be split without destroying the column shape formed inside the phase line column cavity mold 6 and the zero sequence column cavity mold 7.

Claims

1. A three-phase five-column voltage transformer APG molding die for a ring main unit, comprising a transformer cavity (1), characterized in that: The front side of the mutual inductor cavity (1) is movably connected to the middle cavity (2), and the front side of the middle cavity (2) is connected to the column bottom cavity (3). The middle cavity (2) and the column bottom cavity (3) are both provided with upper and lower halves. The front side of the column bottom cavity (3) is connected to the front cavity (4). The top of the mutual inductor cavity (1), the middle cavity (2), the column bottom cavity (3) and the front cavity (4) is movably connected to a top plate (5). The side walls of the top plate (5) are provided in a plurality of pieces according to the positions of the mutual inductor cavity (1), the middle cavity (2), the column bottom cavity (3) and the front cavity (4). The size of the top plate (5) is adjusted according to the positions of the mutual inductor cavity (1), the middle cavity (2), the column bottom cavity (3) and the front cavity (4). 3) and the top size of the front cavity (4), the transformer cavity (1) comprises a cavity (101) and a card block (102), the card block (102) is fixedly connected to the front end of the transformer cavity (1), a combination of a phase column cavity mold (6) is fixedly connected to the top of the top plate (5) between the transformer cavity (1) and the middle cavity (2), a combination of a zero sequence column cavity mold (7) is fixedly connected to the top of the top plate (5) at the top of the column bottom cavity (3) and the front cavity (4), a guide rail assembly (8) is provided at the inner sharp corner of the transformer cavity (1), and the outer end of the guide rail assembly (8) is fixedly connected to the inner sharp corner of the transformer cavity (1).

2. The three-phase five-column voltage transformer APG molding die for a ring main unit according to claim 1, characterized in that: A clamping block (102) is provided at the front end of the cavity (101), the middle cavity (2) and the column bottom cavity (3), and a clamping slot corresponding to the position of the clamping block (102) is provided at the rear sides of both ends of the middle cavity (2), the column bottom cavity (3) and the front cavity (4).

3. The three-phase five-column voltage transformer APG forming die for a ring main unit according to claim 1, characterized in that: The phase column cavity mold (6) comprises a pouring port (601), an upper ring cavity (602), a base cavity (603) and an insertion rod (604); the bottom of the base cavity (603) is divided into two halves; the bottom of the base cavity (603) located at the rear half is movably connected to the front end of the top side of the top plate (5) connected to the top side of the transformer cavity (1); and the bottom of the base cavity (603) located at the front half is movably connected to the rear end of the top side of the top plate (5) connected to the top of the middle cavity (2).

4. The three-phase five-column voltage transformer APG forming die for a ring main unit according to claim 3, characterized in that: The vertical lines of most of the blocks arranged on the pouring port (601), the upper circle cavity (602) and the base cavity (603) are the same; the insertion rod (604) is arranged between the side walls of the pouring port (601), the upper circle cavity (602) and the base cavity (603); the gaps between the side walls of the pouring port (601), the upper circle cavity (602) and the base cavity (603) are connected by inner and outer circle sliding through the side walls of the insertion rod (604); the bottom end of the upper circle cavity (602) is fixedly connected to the top end of the base cavity (603); and the bottom end of the pouring port (601) is fixedly connected to the top end of the upper circle cavity (602).

5. The three-phase five-column voltage transformer APG forming die for a ring main unit according to claim 1, characterized in that: The zero-sequence column cavity mold (7) comprises a top cavity (701), a middle cavity (702) and a ring cavity (703); the top cavity (701), the middle cavity (702) and the ring cavity (703) are all arranged as front and rear halves and snapped together; the bottom of the rear half of the ring cavity (703) is fixedly connected to the front end of the top plate (5) connected to the top of the column bottom cavity (3); and the bottom of the front half of the ring cavity (703) is fixedly connected to the rear end of the top plate (5) connected to the top of the front cavity (4).

6. The three-phase five-column voltage transformer APG forming die for a ring main unit according to claim 5, characterized in that: The bottom end of the middle cavity (702) is fixedly connected to the top end of the ring cavity (703), and the bottom end of the top cavity (701) is fixedly connected to the top end of the middle cavity (702).

7. The three-phase five-column voltage transformer APG forming die for a ring main unit according to claim 1, characterized in that: The guide rail assembly (8) comprises a guide plate (801), a connecting plate (802) and a folding frame (803); the rear end of the connecting plate (802) is fixedly connected to the four corner side walls inside the cavity (101); the outer end of the folding frame (803) is fixedly connected to the inner end of the connecting plate (802); and the side end of the guide plate (801) is fixedly connected to the inner end of the folding frame (803).

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