A kind of hoisting structure for casting mold of pillar type current transformer

Abstract

The utility model discloses a pillar-type current transformer casting mold hoisting structure, including an integrated mold bottom plate, locking screws and sealing strips. The mold bottom plate is a rectangular plate-shaped structure, a pouring port is provided on the mold bottom plate, and a long slot is processed on the mold bottom plate. The long slot is arranged at the center line along the length direction of the mold bottom plate, and the long slot is a stepped slot. The nail head of the locking screw is located in the long slot, and the threaded part of the locking screw passes through the long slot and is threadedly connected to the support sheet of the coil, and the sealing strip is installed on the long slot. The utility model reduces mold accessories and facilitates management and collection by improving the casting mold structure. Most importantly, it is convenient for mold loading and unloading, and improves operating efficiency. The improved integrated mold bottom plate long slot can be opened longer, which is convenient for the bottom surface exhaust molding of the product during casting, reduces the subsequent bottom surface repair work, and improves the product qualification rate and product performance.

Description

Technical Field

[0001] The utility model relates to the technical field of mutual inductors, in particular to a pillar-type current mutual inductor casting mould hoisting structure for hoisting coils. Background Art

[0002] For the casting mold of the pillar-type current transformer, the traditional method of hoisting and fixing the casting mold coil is as follows: Figure 1 As shown, when the coil is wound, a special hoisting bracket is used, and the center of the bracket has a processed thread. The coil is wound into a finished coil with a bracket. Then the casting mold used to connect with the finished coil is designed and processed as follows Figure 2 The mold base shown and Figure 3 The mold coil hanging plate shown is connected and locked by a number of standard screws, such as Figure 4 As shown, the mold bottom plate, the mold coil hanging plate and the finished coil are connected in sequence for assembly to realize the hanging and fixing of the mold to the coil.

[0003] This type of hoisting and fixing method has the following disadvantages. First, since the mold base plate, mold coil hoisting plate, coil and bracket are three independent components, the operator needs to first install and fix the coil to the mold coil hoisting plate through the bracket, and then install and fix the whole coil to the mold base plate. This installation method is cumbersome and inefficient; second, from the overall perspective of mold management, there are many mold accessories, which are easy to lose and damage, and difficult to manage; third, since the mold coil hoisting plate is independent, this leads to the limitation of the length of the hoisting slot, which is not conducive to the bottom surface forming and exhaust when the transformer is cast. Summary of the invention

[0004] In order to improve at least one defect of the prior art, the utility model provides a hoisting structure for a casting mold of a pillar-type current transformer, which solves the problems that the installation method of the prior casting mold is complicated, inconvenient to manage and affects the casting quality.

[0005] The technical scheme adopted by the utility model is a pillar-type current transformer casting mold hoisting structure, including an integrated mold bottom plate, a locking screw and a sealing strip, the mold bottom plate is a rectangular plate structure, a pouring port is provided on the mold bottom plate, and a long slot hole is processed on the mold bottom plate, the long slot hole is arranged at the center line along the length direction of the mold bottom plate, the long slot hole is a stepped slot hole, the upper slot width is A, the lower slot width is B, the nail head of the locking screw is located in the long slot hole, the threaded portion of the locking screw passes through the long slot hole and is threadedly connected to the bracket sheet of the coil, the maximum width of the nail head of the locking screw is C, A>C>B, and the sealing strip is installed on the long slot hole to cover the long slot hole.

[0006] Preferably, the width of the long slot hole is such that the depth of the slot body of part A is greater than or equal to the sum of the height of the nail head of the locking screw and the thickness of the sealing strip.

[0007] Preferably, the number of the locking screws is consistent with the number of support pieces of the coil.

[0008] Preferably, the thickness of the middle portion of the mold bottom plate is greater than the thickness of the surrounding portions, and the top surface of the bracket sheet is in contact with the bottom surface of the middle portion of the mold bottom plate.

[0009] The beneficial effects of the utility model are as follows: the utility model reduces mold accessories and facilitates management and collection by improving the structure of the casting mold, and most importantly, facilitates mold loading and unloading, thereby improving operating efficiency; and the long strip notches of the improved one-piece mold bottom plate can be opened longer, which is convenient for bottom surface exhaust molding of the product during casting, reduces subsequent bottom surface repair work, and improves the product qualification rate and product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the finished coil structure.

[0011] Figure 2 It is a schematic diagram of the existing mold bottom plate structure.

[0012] Figure 3 This is a schematic diagram of the existing mold coil hanging plate structure.

[0013] Figure 4 This is a schematic diagram of the existing lifting mold assembly structure.

[0014] Figure 5 This is a schematic diagram of the assembly of the hoisting structure of the pillar-type current transformer casting mold.

[0015] Figure 6 Schematic diagram of the mold base structure.

[0016] Figure 7 Schematic diagram of the cross-sectional structure of the mold base.

[0017] Markings in the figure: 1- mold base, 2- locking screw, 3- sealing strip, 4- coil, 101- long slot hole, 401- bracket plate, A- upper slot width of the long slot hole, B- lower slot width of the long slot hole, C- maximum width of the locking screw head. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] This application proposes a pillar-type current transformer casting mold hoisting structure, such as Figures 5 to 7 As shown, it includes an integrated mold base plate 1, a locking screw 2 and a sealing strip 3. The mold base plate 1 is a rectangular plate structure, a pouring port is provided on the mold base plate 1, and a long slot hole 101 is processed on the mold base plate 1. The long slot hole 101 is arranged at the center line along the length direction of the mold base plate 1. The long slot hole 101 is a stepped slot hole, the upper slot width is A, and the lower slot width is B. The nail head of the locking screw 2 is located in the long slot hole 101, and the threaded portion of the locking screw 2 passes through the long slot hole 101 and is threadedly connected with the bracket sheet 401 of the coil 4. The maximum width of the nail head of the locking screw 2 is C, A>C>B, so that the nail head of the locking screw 2 can be stuck in the long slot hole 101 and does not interfere with the locking and unscrewing of the locking screw 2. The number of the locking screws 2 is consistent with the number of the brackets 401 of the coil 4. The sealing strip 3 is installed on the long slot hole 101 to cover the long slot hole 101. The width of the long slot hole 101 is equal to the sum of the height of the head of the locking screw 2 and the thickness of the sealing strip 3. The thickness of the middle part of the mold bottom plate 1 is greater than the thickness of the surrounding parts. The length of the long slot hole 101 is equal to or slightly less than the length of the middle part of the mold bottom plate 1, so that the slot hole can be opened longer, which is convenient for the bottom surface of the product to be vented and formed during casting. The top surface of the bracket sheet 401 contacts the bottom surface of the middle part of the mold bottom plate 1.

[0020] The present application directly makes the original mold bottom plate and the mold coil hanging plate into an integrated structure during processing, and opens a long slot hole 101 on the integrated mold bottom plate 1. When in use, the support sheet 401 of the coil 4 is locked on the integrated mold bottom plate 1 at the long slot hole 101 by the locking screw 2. For the long slot hole 101 remaining after the locking screw 2 on the integrated mold bottom plate 1 is locked, in order to prevent material leakage, facilitate operation and improve operation efficiency, the consumable sealing strip 3 is used to press and seal, and then the mold can be hoisted and assembled with other molds for casting.

[0021] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pillar-type current transformer casting mold hoisting structure, characterized in that: The invention comprises an integrated mold base plate (1), a locking screw (2) and a sealing strip (3); the mold base plate (1) is a rectangular plate-shaped structure; a pouring port is provided on the mold base plate (1); a long slot hole (101) is processed on the mold base plate (1); the long slot hole (101) is arranged at the center line along the length direction of the mold base plate (1); the long slot hole (101) is a stepped slot hole; the upper slot width is A; the lower slot width is B; the nail head of the locking screw (2) is located in the long slot hole (101); the threaded portion of the locking screw (2) passes through the long slot hole and is threadedly connected to a bracket sheet (401) of a coil (4); the maximum width of the nail head of the locking screw (2) is C, A>C>B; the sealing strip (3) is installed on the long slot hole (101) to cover the long slot hole (101).

2. A pillar-type current transformer casting mold hoisting structure according to claim 1, characterized in that: The width of the long slot hole (101) is such that the depth of the slot body of part A is greater than or equal to the sum of the height of the nail head of the locking screw (2) and the thickness of the sealing rubber strip (3).

3. The pillar-type current transformer casting mold hoisting structure according to claim 1 is characterized in that: The number of the locking screws (2) is consistent with the number of the support plates (401) of the coil (4).

4. The pillar-type current transformer casting mold hoisting structure according to claim 1 is characterized in that: The thickness of the middle portion of the mold bottom plate (1) is greater than the thickness of the surrounding portions, and the top surface of the support sheet (401) is in contact with the bottom surface of the middle portion of the mold bottom plate (1).

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