Device for manufacturing electrical strength sample of electrical porcelain pug

Abstract

The utility model discloses a device for manufacturing an electrical strength sample of electrical porcelain pug. The device comprises a pressing handle located above equipment, an upper forming pressing die and a lower forming die located below the equipment. And the lower forming die is opposite to the upper forming pressing die above the lower forming die. The lower end of the upper forming pressing die is of a disc type structure, an arc protrusion is arranged in the center of the bottom, and a layer of gypsum inner wall is arranged on the surface of the cylindrical inner cavity of the lower forming die to form an integrated structure. The technical process is simple, pug is cut in a rotary fettling mode, the pug is easy to separate, the size of a sample is regular, the sample is easy to separate from a lower forming die with a gypsum inner wall after being repaired, the shape is regular and uniform, the tested electrical strength data is relatively stable, the electrical performance level of pug of different electrical porcelain formulas can be effectively evaluated, and the production efficiency is improved. The quality of the disc-shaped suspension type porcelain insulator is further improved by guiding the design of an electric porcelain formula, and the method is better applied to an ultra / extra-high voltage power transmission project.

Description

Technical Field

[0001] The utility model relates to a device for making electric strength samples of electric porcelain mud, specifically a device for preparing test pieces for electric strength tests of different formulas of electric porcelain mud, and evaluating the insulation performance of materials, belonging to the technical field of production of disc-shaped suspension porcelain insulators for power transmission lines. Background Art

[0002] With the continuous and rapid development of the electric power industry, the use of ultra-high / ultra-high voltage transmission will achieve longer distance, larger capacity and lower loss power transmission, which is of great significance for optimizing resource allocation, improving the utilization rate of transmission corridors and environmental protection. As a key supporting product for power transmission and transformation projects, the performance requirements of disc-shaped suspension porcelain insulators are getting higher and higher. Not only must they ensure excellent mechanical and electrical properties, but they must also work stably and reliably under long-term mechanical and electrical loads to avoid the appearance of zero values, so as to ensure the safe operation of the line.

[0003] To further improve the quality of existing disc suspension porcelain insulators, it is necessary to study and design a porcelain blank formula with excellent mechanical and insulating properties. In the performance evaluation of the formula clay, the electrical strength test is one of the important tests. The original sample making device is simple, the sample is severely deformed after drying and firing, the test data fluctuates greatly, and the average value is low. It cannot accurately reflect the difference in electrical performance of different formulas of porcelain clay, and thus cannot effectively guide the design of porcelain formula to further improve the quality of disc suspension porcelain insulators. Summary of the invention

[0004] The utility model provides a device for preparing electric strength samples of electric porcelain clay, so as to solve the problems that the prepared samples are seriously deformed after drying and firing, and the test data cannot accurately reflect the differences in the electrical properties of different formulas of electric porcelain clay.

[0005] In order to solve the above technical problems, the following technical solutions are adopted:

[0006] The invention discloses a device for making electric strength samples of electric porcelain clay, the main body of which is a bench drill type device, including a pressing handle located above the device, an upper forming die and a lower forming die below the device; the upper forming die and the lower forming die constitute the main facilities for making samples.

[0007] The lower end of the upper forming die is divided into a disc-like structure, the bottom center of the disc-like structure has an arc protrusion, the lower surface of the disc-like structure is provided with four mud discharge holes and four oil lines in a cross-symmetrical pattern, and the upper center part of the upper forming die is a cylindrical structure.

[0008] The lower molding die is arranged opposite to the upper molding die above. The lower molding die is a cylindrical container with a cavity inside. The surface of the cylindrical cavity is provided with a layer of gypsum inner wall, which is fixed on the lower molding die to form an integrated structure.

[0009] The lower forming die is mounted in the fixed table below.

[0010] Two molding mold holes are respectively arranged on the left, right and bottom of the lower molding mold container, and the inner wall of the gypsum enters the molding mold holes and is fixed on the lower molding mold.

[0011] The top end of the lower forming die is convex outward to form a circular plate-shaped fixing ear, and a fixing hole is respectively arranged on the left and right sides of the fixing ear.

[0012] The fixing platform is a cylindrical container with a hollow interior, and the cylindrical inner cavity is in a corresponding matching relationship with the outer surface of the lower forming mold.

[0013] The top of the cylindrical outer wall of the fixing platform is provided with connection holes corresponding to the fixing holes on both sides, and the fixing ears of the lower forming mold are clamped on the top edge of the fixing platform, and the two are fixed by means of a latch through the fixing holes and connection.

[0014] A cylindrical fixing column extending downward is provided at the bottom center of the fixing platform, and the fixing platform is inserted into the working table of the bench drilling equipment through the fixing column for fixed connection.

[0015] The diameter of the arc protrusion 3-2 of the upper molding die 3 is 23mm, the cylindrical structure 3-3 is 50mm high and 14mm in diameter; the cylindrical inner cavity of the lower molding die 6 is 30mm deep and 80mm in diameter; the inner cavity diameter of the gypsum inner wall 7 is 90mm.

[0016] The beneficial effects of the utility model are:

[0017] The utility model is used for making electrical strength specimens of electric porcelain mud materials. The process is simple. The mud materials are cut by a rotary trimming method. The mud materials are easy to separate. The specimen size is regular. After the trimming is completed, it is easier to get out of the lower forming die with a gypsum inner wall. The shape is regular and uniform. The test electrical strength data is relatively stable. The utility model can effectively evaluate the electrical performance levels of mud materials with different electric porcelain formulas, guide the design of electric porcelain formulas to further improve the quality of disc-shaped suspension porcelain insulators, and better apply them to ultra-high / ultra-high voltage power transmission projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of a device for making electric strength samples of electric porcelain clay materials according to the utility model.

[0019] Figure 2-1 : is a schematic diagram of the front view of the upper molding die, Figure 2-2 2. It is a top view schematic diagram of the upper molding die.

[0020] Figure 3 It is a schematic diagram of the lower molding die.

[0021] Figure 4 It is a schematic diagram of a fixed station.

[0022] Figure 5 It is a schematic diagram of a mud column.

[0023] Symbols in the figure: 1. bench drill type equipment; 2. pressure handle; 3. upper molding die, 3-1. disc-type structure, 3-2. arc protrusion, 3-3. cylindrical structure; 4. mud discharge hole; 5. oil line; 6. lower molding die; 7. gypsum inner wall; 8. molding die hole; 9. fixing device, 9-1. connecting hole, 9-2. fixing column. DETAILED DESCRIPTION

[0024] The specific implementation scheme of the utility model is described in detail below with reference to the accompanying drawings:

[0025] See also Figure 1 The utility model is a device for making electric strength samples of electric porcelain mud. The main body is a bench drill type device 1, including a pressing handle 2 located above the device, an upper forming die 3 and a lower forming die 6 below the device. The upper forming die 3 and the lower forming die 6 constitute the main facilities for making samples.

[0026] See also Figure 2-1 and Figure 2-2 The lower end of the upper molding die 3 is divided into a disc-shaped structure 3-1, a disc-shaped structure 3 - There is an arc protrusion 3-2 at the center of the bottom, which is used for processing the pit in the center of the electric strength test piece. The lower surface of the disc structure 3-1 is provided with four mud discharge holes 4 and four oil lines 5 in a cross-symmetric manner, so that the mud material can be smoothly squeezed to the oil line 5 and then discharged through the mud discharge holes 4 during the rotary repair process. The upper center part of the upper molding die 3 is a cylindrical structure 3-3, which is convenient for connecting and fixing with the upper rotating clamping mechanism of the bench drilling equipment 1.

[0027] The lower molding die 6 is arranged opposite to the upper molding die 3. The structure of the lower molding die 6 is as follows: Figure 3 As shown, the lower molding die 6 is a cylindrical container with a cavity inside. Two molding die holes 8 are respectively provided on the left and right sides and the bottom of the container. A layer of gypsum inner wall 7 is provided on the surface of the cylindrical inner cavity. The gypsum inner wall 7 enters the molding die hole 8 and is fixed on the lower molding die 6 to form an integrated structure. The gypsum inner wall 7 has a good water absorption effect, which reduces the adhesion of the sample and shrinks slightly, making it easier to demold the sample. The top of the lower molding die 6 convexly forms a circular plate-shaped fixing ear 6-1, and a fixing hole 6-2 is respectively provided on the left and right sides of the fixing ear 6-1.

[0028] The lower forming die 6 is sleeved in the fixing table 9 below. Figure 4As shown, the fixed platform 9 is also a cylindrical container with a cavity inside. The cylindrical inner cavity is in a corresponding matching relationship with the outer surface of the lower molding die 6. The left and right sides of the top of the cylindrical outer wall of the fixed platform 9 are respectively provided with connection holes 9-1 corresponding to the fixing holes 6-2. The fixing ears 6-1 of the lower molding die 6 are stuck on the top edge of the fixed platform 9. The two are fixed by a latch through the fixing holes 6-2 and the connection 9-1, which ensures that the upper and lower molding dies are concentric during operation, and the position of the middle pit of the molded sample is used for judgment. A cylindrical fixing column 9-2 extending downward is provided at the bottom center of the fixed platform 9. The fixed platform 9 is inserted into the workbench of the bench drilling equipment 1 through the fixing column 9-2 for fixed connection.

[0029] When the electrical strength test sample of the electric porcelain mud is produced, a mud column is first produced, such as Figure 5 As shown, the mud column is in the shape of a flat cylinder. Put the mud column into the center of the lower molding die 6, spray a proper amount of oil on the surface of the mud material for lubrication, rotate the pressure handle 2 to move the upper molding die 3 downward, form a certain amount of extrusion on the mud material, and well attach the mud material to the plaster inner wall 7 of the lower molding die 6. Start the bench drill 1 to rotate the upper molding die 3, operate the pressure handle 2 to evenly move the upper molding die 3 downward to perform rotation repair on the mud material, and then remove the repaired electrical strength test piece together with the lower molding die 6, and demold after slightly drying, so as to obtain the initial test piece with a pit in the middle. After drying, trimming and firing, the electrical strength test piece of the electric porcelain mud material with regular shape and stable test data can be obtained.

[0030] As one of the implementation plans, the parameters of each structural part are as follows: the diameter of the arc protrusion 3-2 of the upper molding die 3 is 23mm; the cylindrical structure 3-3 is 50mm high and 14mm in diameter; the cylindrical inner cavity of the lower molding die 6 is 30mm deep and 80mm in diameter; the inner cavity diameter of the gypsum inner wall 7 is 90mm; the height of the mud column is 40-50mm, and the diameter is 2mm smaller than the diameter of the gypsum inner wall 7, which can ensure that the mud column is squeezed to fit the gypsum inner wall 7, and reduce the influence of the deformation of the mud column on the internal stress of the test piece.

[0031] Furthermore, the inner wall of the lower molding die is filled with gypsum, and the gypsum is inserted into the molding die hole and fixed on its surface to form an integrated structure with an inner cavity diameter of 90 mm. It has good water absorption effect, which reduces the adhesion of the sample and shrinks slightly, making it easier to demold the sample.

[0032] The utility model is mainly used for making electrical strength samples of electric porcelain mud, conducting electrical strength tests of muds of different formulas, evaluating the electrical performance level, guiding the design of electric porcelain formulas to further improve the quality of disc-shaped suspension porcelain insulators, and better applying them to ultra-high / ultra-high voltage transmission projects.

Claims

1. A device for preparing electric strength samples of electric porcelain clay, the main body of which is a bench drill type device (1), comprising a pressing handle (2) located above the device, an upper forming die (3) and a lower forming die (6) located below the device; the upper forming die (3) and the lower forming die (6) constitute the main facilities for preparing the samples; the characteristics are as follows: The lower end of the upper molding die (3) is divided into a disc-shaped structure (3-1), the bottom center of the disc-shaped structure (3-1) is provided with an arc protrusion (3-2), the lower surface of the disc-shaped structure (3-1) is provided with four mud discharge holes (4) and four oil lines (5) in a cross-symmetrical pattern, and the upper center part of the upper molding die (3) is a cylindrical structure (3-3); The lower molding die (6) is arranged opposite to the upper molding die (3) above. The lower molding die (6) is a cylindrical container with a hollow interior. A layer of gypsum inner wall (7) is provided on the surface of the cylindrical inner cavity and is fixed on the lower molding die (6) to form an integrated structure. The lower forming die (6) is sleeved in the fixing platform (9) below.

2. The device for preparing electric strength samples of electric porcelain clay according to claim 1, characterized in that: Two molding holes (8) are respectively arranged on the left and right sides and the bottom of the container of the lower molding mold (6), and the gypsum inner wall (7) enters the molding holes (8) and is fixed on the lower molding mold (6).

3. The device for preparing electric strength samples of electric porcelain clay according to claim 1, characterized in that: The top end of the lower forming die (6) is convex outward to form a circular plate-shaped fixing ear (6-1), and a fixing hole (6-2) is respectively provided on the left and right sides of the fixing ear (6-1).

4. The device for preparing electric strength samples of electric porcelain clay according to claim 1, characterized in that: The fixing platform (9) is a cylindrical container with a hollow interior, and the cylindrical inner cavity is in a corresponding matching relationship with the outer surface of the lower forming mold (6).

5. The device for preparing electric strength samples of electric porcelain clay according to claim 3, characterized in that: Connecting holes (9-1) corresponding to the fixing holes (6-2) are respectively arranged on the left and right sides of the top of the cylindrical outer wall of the fixing platform (9); the fixing ears (6-1) of the lower molding die (6) are clamped on the top edge of the fixing platform (9); and the two are fixed by means of a latch through the fixing holes (6-2) and the connecting holes (9-1).

6. The device for preparing electric strength samples of electric porcelain clay according to claim 1, characterized in that: A cylindrical fixing column (9-2) extending downward is provided at the bottom center of the fixing platform (9), and the fixing platform (9) is inserted into the working table of the bench drilling equipment (1) through the fixing column (9-2) for fixed connection.

7. The device for preparing electric strength samples of electric porcelain clay according to claim 1, characterized in that: The diameter of the arc protrusion (3-2) of the upper molding die (3) is 23 mm, the height of the cylindrical structure (3-3) is 50 mm, and the diameter is 14 mm; the depth of the cylindrical inner cavity of the lower molding die (6) is 30 mm, and the diameter is 80 mm; the inner cavity diameter of the gypsum inner wall (7) is 90 mm.

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