Die-casting mould for a zero-sequence transformer

Abstract

The utility model discloses a die -casting die of zero sequence mutual -inductor is suitable for the production of different specifications zero sequence mutual -inductor, improves die replacement efficiency, reduces cost. The die -casting die of zero sequence mutual -inductor includes static mode, movable die and mould core, the movable die is relative to the static mode and carries out the opening and closing action, the side surface recess of static mode with movable die is recessed and forms the recess, the recess is covered after movable die with static mode closes the mould to form the cavity of clearance fit for mould core, the bottom of recess is provided with window, the both sides of window are provided with the sliding slot of the lower surface positioning cooperation of mould core, the mould core has the mould cavity of matching with the zero sequence mutual -inductor of production, and the injection port of communication with mould cavity, and injection port is opposite to window setting.

Description

Technical Field

[0001] This utility model belongs to the field of zero-sequence current transformer technology, and in particular refers to a die-casting mold for a zero-sequence current transformer. Background Technology

[0002] Zero-sequence current transformers are key devices used in power systems, capable of detecting and accurately measuring zero-sequence current in a three-phase AC system. Zero-sequence current refers to the current flowing when the vector sum of the three-phase currents is zero. In the event of an asymmetrical fault in the power system, such as a ground fault, the zero-sequence current will increase significantly. Zero-sequence current transformers are commonly used for power system protection and monitoring to assist in fault detection and isolation.

[0003] In actual production, zero-sequence current transformers have numerous inner diameter specifications, with differences between specifications of only 20mm. When producing small quantities but a wide variety of products, frequent mold changes are required, leading to reduced production efficiency. Currently, the moving and stationary molds of die-casting molds are fixedly mounted on the equipment, making disassembly and installation very complex, thus increasing additional production costs. Utility Model Content

[0004] The main purpose of this utility model is to provide a die-casting mold for zero-sequence current transformers, which solves the problems existing in the prior art, is suitable for the interleaved production of zero-sequence current transformers of different specifications, improves mold replacement efficiency and reduces costs.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A die-casting mold for a zero-sequence current transformer includes a stationary mold, a moving mold, and a mold core. The moving mold opens and closes relative to the stationary mold. A groove is formed on the side of the stationary mold opposite to the moving mold. After the moving mold and the stationary mold are closed, the groove is covered to form a cavity for clearance fitting of the mold core. A window is provided at the bottom of the groove, and sliding grooves are provided on both sides of the window for positioning and fitting of the lower surface of the mold core. The mold core has a mold cavity that matches the zero-sequence current transformer to be produced, and a sprue port communicating with the mold cavity. The sprue port is positioned opposite to the window.

[0007] The moving mold and the stationary mold are respectively provided with guide posts and guide holes on their opposite surfaces.

[0008] Preferably, the guide hole is provided on both sides of the groove.

[0009] The bottom wall of the groove extends outward to form a boss, causing the window and the slide to extend outward simultaneously.

[0010] Preferably, the moving mold is provided with a notch for the boss to be inserted.

[0011] Both sides of the stationary mold and the moving mold are provided with several mounting holes.

[0012] The mold core includes an openable first mold core and a second mold core, as well as a base plate; the first mold core and the second mold core each have a mold groove that matches the zero-sequence current transformer to be produced, and the two mold grooves are closed to form the mold cavity; the base plate seals the lower opening of the mold cavity and is provided with the injection port.

[0013] The top and side surfaces of the stationary mold are provided with several slots for assembling heating rods.

[0014] After adopting the above technical solution, the present invention has the following technical effects:

[0015] This invention comprises a stationary mold, a moving mold, and a mold core. The stationary mold holds the mold core and has a groove for positioning the mold core, ensuring that mold cores with different mold cavities are uniformly positioned within the stationary mold, facilitating alignment with the injection port. During production, the moving mold acts as a clamping mechanism to prevent the mold core from shaking, while the side walls of the groove in the stationary mold provide insulation. This invention utilizes the opening and closing action of the moving and stationary molds to pick up and place the mold core. The mold core is fixed by the clamping action of the moving mold, and there are no other mechanical connection structures. When producing zero-sequence current transformers of different specifications, the mold core can be quickly replaced simply by opening the moving mold, without needing to disassemble or replace the stationary and moving molds, thus improving replacement efficiency and reducing costs. Attached Figure Description

[0016] Figure 1 This is a perspective view of a specific embodiment of the present utility model.

[0017] Figure 2 Overall breakdown of specific embodiments of this utility model Figure 1 .

[0018] Figure 3 Overall breakdown of specific embodiments of this utility model Figure 2 .

[0019] Figure 4 This is an exploded view of the mold core according to a specific embodiment of the present utility model.

[0020] Explanation of icon numbers:

[0021] 1-Stationary mold; 11-Groove; 12-Window; 13-Groove; 14-Guide hole; 15-Boss; 16-Slot;

[0022] 2-Moving mold; 21-Guide post; 22-Notch;

[0023] 3-Mold core; 3a-First mold core; 3b-Second mold core; 3c-Base plate; 31-Injection port; 32-Mold groove;

[0024] a-Zero sequence mutual inductor. Detailed Implementation

[0025] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0026] refer to Figure 1-4 As shown, this utility model discloses a die-casting mold for a zero-sequence current transformer, including a stationary mold 1, a moving mold 2, and a mold core 3;

[0027] Both the stationary mold 1 and the moving mold 2 are installed on the production equipment. The moving mold 2 is driven by the drive device of the production equipment to realize the opening and closing action relative to the stationary mold 1.

[0028] The side of the stationary mold 1 and the moving mold 2 opposite each other has a recessed groove 11. After the moving mold 2 and the stationary mold 1 are closed, the groove 11 is covered to form a cavity for the mold core 3 to fit with the clearance. The "clearance fit" here should be understood as the mold core 3 being restricted in several directions after fitting into the groove 11 so that it will not wobble.

[0029] A window 12 is provided at the bottom of the groove 11, and sliding grooves 13 are provided on both sides of the window 12 for positioning and fitting the lower surface of the mold core 3.

[0030] The mold core 3 has a mold cavity that matches the zero-sequence current transformer a to be produced, and a sprue 31 that communicates with the mold cavity. The sprue 31 is set opposite to the window 12.

[0031] Through the above scheme, this utility model consists of a stationary mold 1, a moving mold 2, and a mold core 3. The stationary mold 1 is used to place the mold core 3 and has a sliding groove 13 for positioning the mold core 3, so that the mold core 3 with different specifications of mold cavities is uniformly positioned in the stationary mold 1, which is convenient for aligning with the injection port 31. During the production process, the moving mold 2 plays a clamping role to prevent the mold core 3 from shaking. At the same time, the two side walls of the groove 11 of the stationary mold 1 have a heat preservation function. This utility model uses the opening and closing action of the moving mold 2 and the stationary mold 1 to pick up and put in the mold core 3. The mold core 3 is fixed by the clamping action of the moving mold 2. In addition, there is no other mechanical connection structure. When carrying out the interleaving production of zero-sequence current transformers of different specifications, the mold core 3 can be quickly replaced simply by opening the moving mold 2, without having to disassemble and replace the stationary mold 1 and the moving mold 2, thereby improving the replacement efficiency and reducing the cost.

[0032] The following are specific embodiments of the present invention.

[0033] The moving mold 2 and the stationary mold 1 are respectively provided with guide pillars 21 and guide holes 14 on their opposite surfaces to guide the closing direction of the moving mold 2 and play a guiding role.

[0034] Furthermore, guide holes 14 are provided on both sides of the groove 11, that is, at least one pair of guide posts 21 and guide holes 14 are provided on both sides of the groove 11.

[0035] The bottom wall of the groove 11 extends outward to form a boss 15, so that the window 12 and the slide 13 extend outward simultaneously. When the mold core 3 exits the groove 11, it is still supported by the boss 15 of the stationary mold 1, and the mold core 3 can be opened and closed directly in the stationary mold 1.

[0036] Furthermore, the aforementioned moving mold 2 is provided with a notch 22 for the boss 15 to be inserted.

[0037] Both sides of the aforementioned stationary mold 1 and moving mold 2 are provided with several mounting holes to facilitate the installation and fixation of the stationary mold 1 and moving mold 2 on the equipment.

[0038] The aforementioned mold core 3 includes an openable first mold core 3a and a second mold core 3b, and a base plate 3c; the first mold core 3a and the second mold core 3b each have a mold groove 32 that matches the zero-sequence current transformer a to be produced, and the two mold grooves are closed to form the aforementioned mold cavity; the base plate 3c seals the lower opening of the mold cavity and is provided with the aforementioned injection port 31.

[0039] The top and side surfaces of the aforementioned static mold 1 are provided with several slots 16 for mounting heating rods, which can provide heat preservation for the mold core 3.

[0040] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A die-casting mold for a zero-sequence current transformer, characterized in that: Includes static mold, moving mold, and mold core; The moving mold performs an opening and closing action relative to the stationary mold; The side of the stationary mold opposite to the moving mold is recessed to form a groove. After the moving mold and the stationary mold are closed, the groove is covered to form a cavity for the mold core to fit the gap. A window is provided at the bottom of the groove, and sliding grooves are provided on both sides of the window for positioning and engaging with the lower surface of the mold core. The mold core has a mold cavity that matches the zero-sequence current transformer to be produced, and a material injection port that communicates with the mold cavity. The material injection port is arranged opposite to the window.

2. The die-casting mold for the zero-sequence current transformer as described in claim 1, characterized in that: The moving mold and the stationary mold are respectively provided with guide posts and guide holes on their opposite surfaces.

3. The die-casting mold for the zero-sequence current transformer as described in claim 2, characterized in that: The guide holes are provided on both sides of the groove.

4. The die-casting mold for the zero-sequence current transformer as described in claim 1, characterized in that: The bottom wall of the groove extends outward to form a boss, causing the window and the slide to extend outward simultaneously.

5. The die-casting mold for the zero-sequence current transformer as described in claim 4, characterized in that: The moving mold is provided with a notch for the boss to be inserted.

6. The die-casting mold for the zero-sequence current transformer as described in claim 1, characterized in that: Both sides of the stationary mold and the moving mold are provided with several mounting holes.

7. The die-casting mold for the zero-sequence current transformer as described in claim 1, characterized in that: The mold core includes an openable first mold core and a second mold core, as well as a base plate; the first mold core and the second mold core each have a mold groove that matches the zero-sequence current transformer to be produced, and the two mold grooves are closed to form the mold cavity; the base plate seals the lower opening of the mold cavity and is provided with the injection port.

8. The die-casting mold for the zero-sequence current transformer as described in claim 1, characterized in that: The top and side surfaces of the stationary mold are provided with several slots for assembling heating rods.

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