Aluminum alloy casting box body for capacitor voltage transformer

Abstract

The utility model discloses an aluminum alloy casting box body for a capacitor voltage transformer, which comprises a box bottom, a box wall is arranged at the top of the box bottom, a rectangular plane is arranged at the top of the box wall, reinforcing ribs are fixedly connected to the front surface and the back surface of the box wall, ground feet are fixedly connected to the four corners of the box bottom, and the rectangular plane is arranged on the box wall. The ground feet are fixedly connected to the four corners of the bottom end of the box wall, the longitudinal cross section of each ground foot is arranged to be in a U shape, and a lifting hole is formed in one side of each ground foot. The box body is composed of the reinforcing ribs, the U-shaped ground feet arranged at the four corners of the bottom end of the box wall, the box bottom and the box wall, the reinforcing ribs are arranged on the front face and the back face of the box body, the box wall is reinforced through the reinforcing ribs, and the contact area between the box body and the ground is increased through the U-shaped ground feet; therefore, the mechanical strength of the box body is improved, and the anti-seismic performance of the box body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power equipment, in particular to an aluminum alloy casting box for a capacitive voltage transformer. Background Art

[0002] As a voltage signal measuring device, capacitive voltage transformer is widely used in high-voltage power systems. With the construction and development of ultra-high voltage AC transmission networks, the production and manufacturing technology of power equipment has been upgraded. In addition to excellent electrical performance indicators and safe and reliable product operation, the power grid has put forward new requirements for product appearance quality and green manufacturing. Therefore, if enterprises want to survive in the fierce market competition, they must respond to market demand and develop high-quality equipment.

[0003] The capacitive voltage transformer is composed of a capacitor voltage divider stacked on an electromagnetic unit in a building block style. The higher the voltage level, the more capacitor voltage divider sections there are, and the heavier the weight that the electromagnetic unit box needs to bear. The traditional battery unit box is composed of a box wall and a box bottom. When the box is vibrated, the box wall will tilt and deform due to the weight it bears. Utility Model Content

[0004] The purpose of the utility model is to provide an aluminum alloy casting box for a capacitive voltage transformer to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an aluminum alloy cast box for a capacitive voltage transformer, comprising a box bottom, a box wall is arranged on the top of the box bottom, a rectangular plane is arranged on the top of the box wall, reinforcing ribs are fixedly connected to the front and back sides of the box wall, and ground feet are fixedly connected to the four corners of the box bottom, the ground feet are fixedly connected to the four corners of the bottom end of the box wall, and the longitudinal cross-section of the ground feet is arranged to be U-shaped.

[0006] Preferably, a lifting hole is provided on one side of the foot.

[0007] Preferably, the box wall is configured to be in the shape of an inverted square cone.

[0008] Preferably, the thickness of the box bottom is 15-20 mm, the thickness of the box wall is 8-11 mm, the thickness of the rectangular plane is 20-30 mm, the thickness of the foot is 20-30 mm, the width of the reinforcing rib is 20-50 mm, and the thickness of the reinforcing rib is 2-5 mm.

[0009] Preferably, a secondary outlet box docking boss for sealing the installation of the secondary outlet box is fixedly connected to the front of the box wall, and a secondary outlet hole for threading the wires is provided on the front of the box wall.

[0010] Preferably, an oil level observation hole is provided on the back side of the box wall.

[0011] Preferably, a plurality of inner bosses are symmetrically fixedly connected to the front and back sides of the box wall, and the plurality of inner bosses are all fixedly connected to the top end of the box bottom.

[0012] Preferably, a medium-voltage earthing switch boss is provided on one side of the box wall, and a earthing switch accessory boss is provided on one side of the box wall.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model uses reinforcing ribs and U-shaped feet arranged at the four corners of the bottom end of the box wall to form a box body with the box bottom and the box wall. The reinforcing ribs are arranged on the front and back sides of the box body. The box wall is reinforced by the reinforcing ribs, and the contact area between the box body and the ground is increased by the U-shaped feet. The mechanical strength of the box body is improved by the design of the reinforcing ribs and the feet, thereby improving the earthquake resistance of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the front structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the utility model from top view.

[0018] Figure 4 It is a side structural schematic diagram of the utility model.

[0019] In the figure: 1. Box bottom; 2. Box wall; 3. Rectangular plane; 4. Reinforcement ribs; 5. Ground anchor; 6. Secondary outlet box docking boss; 7. Secondary outlet hole; 8. Inner boss; 9. Oil level observation hole; 10. Medium voltage grounding switch boss; 11. Grounding switch accessory boss. DETAILED DESCRIPTION

[0020] 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.

[0021] The utility model provides Figure 1-4An aluminum alloy cast box for a capacitive voltage transformer is shown, comprising a box bottom 1, a box wall 2 is arranged on the top of the box bottom 1, a rectangular plane 3 is arranged on the top of the box wall 2, reinforcing ribs 4 are fixedly connected to the front and back of the box wall 2, and ground feet 5 are fixedly connected to the four corners of the bottom of the box bottom 1, and the ground feet 5 are fixedly connected to the four corners of the bottom end of the box wall 2. The longitudinal cross-section of the ground foot 5 is set to a U shape, a lifting hole is opened on one side of the ground foot 5, and the box wall 2 is set to an inverted square table shape.

[0022] Specifically, the thickness of the box bottom 1 is 15-20 mm, the thickness of the box wall 2 is 8-11 mm, the thickness of the rectangular plane 3 is 20-30 mm, the thickness of the foot 5 is 20-30 mm, the width of the reinforcing rib 4 is 20-50 mm, and the thickness of the reinforcing rib 4 is 2-5 mm.

[0023] It should be noted that the box bottom 1 and box wall 2 constitute the box body of the capacitive voltage transformer, and the box body of the capacitive voltage transformer is made of an aluminum alloy cast box body. This material has excellent thermal conductivity and mechanical strength, and can effectively protect internal components; a rectangular sealing groove is designed on the inner side of the rectangular plane 3, and the size of the groove is matched with the sealing gasket. 20 equidistant through holes are symmetrically arranged on the outer side of the rectangular plane 3. This design makes the limiting sealing performance more reliable, and the sealing gasket is hidden to reduce the degree of damage to the sealing gasket by the environment, and the stacking efficiency of the capacitive voltage divider is higher; the reinforcing ribs 4 are symmetrically distributed in the middle position of the front and back of the box wall 2, protruding 2 to 5 mm from the box surface, with a width of 20 to 50 mm, and the reinforcing ribs 4 are connected through the rectangular plane 3 and the box bottom 1, so that the rectangular plane is 3. The box bottom 1 and the box wall 2 are connected, so that the strength of the box body is strengthened by the reinforcing ribs 4; the foot 5 is designed to be symmetrical at the four diagonal positions of the box body, and holes for product installation are opened on the foot 5. The hole size meets the product installation requirements. The foot 5 is U-shaped and is fixedly connected to the box bottom 1 and the box wall 2 respectively. The foot 5 is 20 to 30 mm thick and has lifting holes symmetrically opened on the side to ensure the mechanical strength of the box body under the premise of thinning the box wall 2, meet high seismic requirements, and reduce the weight of the box body; the inverted square cone-shaped box wall 2 is designed with a taper of no more than 8°, so that during the production process, the taper meets the requirements of the casting demoulding process, which is convenient for the lifting of internal components. The shape of the box wall fits the installation design of the internal components. When in use, the product uses less oil volume.

[0024] Specifically, a secondary outlet box docking boss 6 for installing and sealing the secondary outlet box is fixedly connected to the front of the box wall 2, and a secondary outlet hole 7 for threading wires is provided on the front of the box wall 2.

[0025] It should be noted that the secondary outlet hole 7 is located on the front side of the box body, with an aperture size of 50 to 150 mm. A sealing groove and a plurality of evenly distributed threaded holes are designed around the opening for installation and sealing of the secondary outlet board. The secondary outlet box docking boss 6 is used for installation and sealing of the secondary outlet box to ensure that the secondary terminal board and its internal accessories are completely sealed after installation. This design achieves: the installation and connection of the secondary outlet box, the secondary terminal board and the internal components are more convenient and compact.

[0026] Specifically, an oil level observation hole 9 is opened on the back side of the box wall 2 .

[0027] It should be noted that the through hole size of the oil level observation hole 9 is 50 to 100 mm. The outer side of the oil level observation hole 9 is designed with a sealing groove and a threaded hole for installing and fixing the pressure plate. When in use, the oil level observation window is installed through the threaded hole. Through the design of the sealing groove and the pressure plate, the sealing of the oil level observation window is more reliable, and the oil level observation of the box is clearer and more visible.

[0028] Specifically, a plurality of inner bosses 8 are symmetrically fixedly connected to the front and back sides of the box wall 2 , and the plurality of inner bosses 8 are all fixedly connected to the top of the box bottom 1 .

[0029] It should be noted that the outer part of the box bottom 1 is concave by about 2 mm, and the number, height and opening size of the internal bosses 8 are designed according to the installation position of the internal components. When in use, it is convenient for the layout and fixed installation of internal medium-voltage transformers, compensating inductors, dampers and other components.

[0030] Specifically, a medium-voltage earthing switch boss 10 is provided on one side of the box wall 2 , and a earthing switch accessory boss 11 is provided on one side of the box wall 2 .

[0031] It should be noted that the medium-voltage grounding switch boss 10 and the grounding switch accessory boss 11 are processed according to whether the product actually requires a grounding switch, thereby achieving: positioning and installing the grounding switch, using one mold for two purposes, reducing mold cost expenditure, improving the standardization of product design, and improving box production efficiency.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aluminum alloy casting box for a capacitive voltage transformer, comprising a box bottom (1), a box wall (2) is arranged on the top of the box bottom (1), and a rectangular plane (3) is arranged on the top of the box wall (2), characterized in that: The front and back sides of the box wall (2) are fixedly connected with reinforcing ribs (4), and the four corners of the box bottom (1) are fixedly connected with footings (5), the footings (5) are fixedly connected to the four corners of the bottom end of the box wall (2), and the longitudinal cross-section of the footings (5) is set to be U-shaped.

2. The aluminum alloy casting box for a capacitive voltage transformer according to claim 1, characterized in that: A lifting hole is provided on one side of the foot (5).

3. The aluminum alloy casting box for a capacitive voltage transformer according to claim 1, characterized in that: The box wall (2) is arranged in an inverted square cone shape.

4. The aluminum alloy casting box for a capacitive voltage transformer according to claim 1, characterized in that: The thickness of the box bottom (1) is 15 to 20 mm, the thickness of the box wall (2) is 8 to 11 mm, the thickness of the rectangular plane (3) is 20 to 30 mm, the thickness of the foot (5) is 20 to 30 mm, the width of the reinforcing rib (4) is 20 to 50 mm, and the thickness of the reinforcing rib (4) is 2 to 5 mm.

5. The aluminum alloy casting box for capacitive voltage transformer according to claim 1, characterized in that: A secondary outlet box docking boss (6) for installing and sealing the secondary outlet box is fixedly connected to the front of the box wall (2), and a secondary outlet hole (7) for threading wires is provided on the front of the box wall (2).

6. The aluminum alloy casting box for capacitive voltage transformer according to claim 1, characterized in that: An oil level observation hole (9) is provided on the back side of the box wall (2).

7. The aluminum alloy casting box for a capacitive voltage transformer according to claim 1, characterized in that: A plurality of inner bosses (8) are symmetrically fixedly connected to the front and back sides of the box wall (2), and the plurality of inner bosses (8) are all fixedly connected to the top end of the box bottom (1).

8. The aluminum alloy casting box for a capacitive voltage transformer according to claim 1, characterized in that: A medium-voltage grounding knife switch boss (10) is provided on one side of the box wall (2), and a grounding knife switch accessory boss (11) is provided on one side of the box wall (2).

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