Dry-type casing pipe defect model prototype

Abstract

The utility model discloses a dry-type bushing defect model prototype which comprises a detection table, two supporting seats used for placing a bushing core body to be detected are fixed on the upper surface of the detection table, a high-voltage power supply is fixed on the side edge of the upper surface of the detection table, a copper bar terminal is arranged on the outer side of the high-voltage power supply, the copper bar terminal is fixedly connected with a copper wire, and the copper wire is fixed on the detection table. And the other end of the copper wire is fixedly connected with a screw. According to the utility model, the detection bench, the supporting seat, the high-voltage power supply, the fixed assembly, the moving assembly and the punching assembly are arranged, so that radial and surface defect detection of the sleeve can be realized by the prototype, the prototype is used for simulating the fault phenomenon of the sleeve under large short-circuit current when core radial breakdown and surface flashover actually occur, and short-circuit current test can be carried out; and state variables such as voltage, current, pressure, temperature and images in the bushing test process are obtained, the fault characteristics of the dry bushing are analyzed, and a scientific basis is provided for fault defense and structure optimization of the dry bushing.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage bushing detection for power transmission and transformation equipment, in particular to a dry bushing defect model prototype. Background Art

[0002] The operational reliability of bushings is directly related to the operational safety of large power grids. It is one of the key equipment for developing high-voltage power transmission and ensuring the safe and stable operation of power systems. In recent years, oil-impregnated paper bushings have experienced many defects such as poor sealing, abnormal oil chromatography, oil leakage, and combustion and explosion accidents, which have seriously affected the safety and stability of the power grid and the reliability of power supply. The operational reliability and combustion and explosion characteristics of bushings have received great attention. As one of the main alternatives to oil-paper bushings, the number and proportion of dry bushings have increased year by year, but the research on their combustion and explosion characteristics is still in a blank stage, and it is unable to provide a theoretical basis and technical support for on-site equipment selection, combustion and explosion warning, and safety protection.

[0003] The utility model proposes a dry bushing defect model prototype, which can obtain test data of the dry bushing under short-circuit fault current conditions through fault tests, and provide a scientific basis for dry bushing fault defense and structural optimization. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a dry casing defect model prototype.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dry-type casing defect model prototype, including a detection table, two support seats for placing the casing core to be tested are fixed on the upper surface of the detection table, a high-voltage power supply is fixed on the side of the upper surface of the detection table, and a copper bus terminal is provided on the outer side of the high-voltage power supply, the copper bus terminal is fixedly connected with a copper wire, and the other end of the copper wire is fixedly connected with a screw, a fixing component for fixing the casing core to be tested is installed on the upper surface of the detection table near the support seat, a moving component is arranged on the upper surface of the detection table and parallel to the support seat, and the moving end of the moving component is fixedly connected with a punching component.

[0006] Furthermore, an arc-shaped positioning groove is provided on the top of the support seat.

[0007] Furthermore, the fixing assembly includes a first L-shaped plate fixed to the upper surface of the detection platform, a cylinder is fixed to the top of the first L-shaped plate, and a pressure plate is fixedly connected to the telescopic end of the bottom of the cylinder.

[0008] Furthermore, the pressing plate is designed to be arc-shaped.

[0009] Furthermore, the punching assembly includes a second L-shaped plate, an electric telescopic rod is fixed to the top end of the second L-shaped plate, the telescopic end of the electric telescopic rod is fixedly connected to a motor, and the driving end of the motor is fixedly connected to a drill bit.

[0010] Furthermore, the moving assembly includes a T-shaped guide rail fixed to the upper surface of the detection table, the surface of the T-shaped guide rail is slidably connected to a slide seat, the second L-shaped plate is fixed to the upper surface of the slide seat, and the top wall of the slide seat is penetrated by and threadedly connected with a locking bolt.

[0011] Furthermore, the upper surface of the T-shaped guide rail is provided with scale lines.

[0012] Beneficial effects of the utility model:

[0013] When the utility model is in use, the dry-type bushing defect model prototype is provided with a detection platform, a support seat, a high-voltage power supply, a fixed component, a movable component and a punching component. The prototype can realize the radial and surface defect detection of the bushing, and is used to simulate the fault phenomenon under a large current short-circuit current when the bushing actually has radial breakdown of the core and surface flashover. The short-circuit current test can be carried out, and the state quantities such as voltage, current, pressure, temperature, image, etc. of the bushing test process can be obtained, and the fault characteristics of the dry-type bushing can be analyzed, so as to provide a scientific basis for the dry-type bushing fault defense and structural optimization. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 : Schematic diagram of radial breakdown fault detection of the utility model;

[0016] Figure 2 : Schematic diagram of surface flashover fault detection of the utility model;

[0017] Figure 3 : A three-dimensional diagram of the support seat of the utility model;

[0018] Figure 4 : A three-dimensional diagram of the mobile assembly of the present utility model.

[0019] The reference numerals are as follows:

[0020] 1. Testing table; 2. Support seat; 21. Positioning slot; 3. High voltage power supply; 4. Copper busbar terminal; 5. Copper wire; 6. Screw; 7. Fixing assembly; 71. First L-shaped plate; 72. Cylinder; 73. Pressing plate; 8. Moving assembly; 81. T-shaped guide rail; 82. Sliding seat; 83. Locking bolt; 9. Punching assembly; 91. Second L-shaped plate; 92. Electric telescopic rod; 93. Motor; 94. Drill bit; 10. Casing core to be tested. 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 of 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] like Figure 1-Figure 4 As shown, a dry-type casing defect model prototype is involved, including a test table 1, two support seats 2 for placing a casing core body 10 to be tested are fixed on the upper surface of the test table 1, a high-voltage power supply 3 is fixed on the side of the upper surface of the test table 1, and a copper bus terminal 4 is provided on the outer side of the high-voltage power supply 3, the copper bus terminal 4 is fixedly connected with a copper wire 5, and the other end of the copper wire 5 is fixedly connected with a screw 6, a fixing component 7 for fixing the casing core body 10 to be tested is installed on the upper surface of the test table 1 near the support seat 2, a moving component 8 is arranged on the upper surface of the test table 1 and parallel to the support seat 2, and a punching component 9 is fixedly connected to the moving end of the moving component 8.

[0023] An arc-shaped positioning groove 21 is formed on the top of the support base 2 .

[0024] In this embodiment, the curvature of the positioning groove 21 matches the curvature of the sleeve core body 10 to be tested, so that the sleeve core body 10 to be tested can be clamped in the positioning groove 21 .

[0025] The fixing assembly 7 comprises a first L-shaped plate 71 fixed to the upper surface of the testing platform 1 , a cylinder 72 is fixed to the top of the first L-shaped plate 71 , and a pressing plate 73 is fixedly connected to the telescopic end of the bottom of the cylinder 72 .

[0026] The cylinder 72 drives the pressing plate 73 to descend, and the pressing plate 73 can be used to press and fix the sleeve core 10 to be tested in the positioning groove 21 .

[0027] The pressing plate 73 is designed in an arc shape. The pressing plate 73 adopts an arc shape design so that it can better fit the surface of the sleeve core body 10 to be tested, thereby ensuring the stability of fixing the sleeve core body 10 to be tested.

[0028] The punching assembly 9 includes a second L-shaped plate 91 , a top end of the second L-shaped plate 91 is fixed with an electric telescopic rod 92 , a telescopic end of the electric telescopic rod 92 is fixedly connected with a motor 93 , and a driving end of the motor 93 is fixedly connected with a drill bit 94 .

[0029] The drill bit 94 is first driven to rotate by the motor 93 , and then driven down by the electric telescopic rod 92 . The rotating drill bit 94 can be used to drill holes on the casing core body 10 to be tested so as to install the screws 6 .

[0030] The moving assembly 8 includes a T-shaped guide rail 81 fixed to the upper surface of the detection platform 1, a slide seat 82 is slidably connected to the surface of the T-shaped guide rail 81, a second L-shaped plate 91 is fixed to the upper surface of the slide seat 82, and a locking bolt 83 is passed through and threadedly connected to the top wall of the slide seat 82.

[0031] Since radial and surface defect detection require different punching positions on the casing core body 10 to be tested, the position of the punching assembly 9 can be adjusted by moving the slide 82, and the slide 82 can be fixed by tightening the locking bolt 83, thereby fixing the position of the punching assembly 9.

[0032] The upper surface of the T-shaped guide rail 81 is provided with scale lines. The position of the punching assembly 9 after adjustment can be accurately known by referring to the scale lines.

[0033] Working principle: During radial defect detection: place the casing core 10 to be tested in the positioning groove 21 at the top of the two support seats 2, and then press and fix the casing core 10 to be tested by the fixing component 7, and then move the punching component 9 to Figure 1 Position, use the punching assembly 9 to drill vertically downward on the surface of the casing core 10 to be tested to form a small hole on the central guide rod, then screw the screw 6 into the small hole, and finally turn on the high voltage power supply 3 for detection;

[0034] During the surface defect detection: similarly, the casing core body 10 to be tested is placed in the positioning grooves 21 at the top of the two support seats 2, and then the casing core body 10 to be tested is pressed and fixed by the fixing assembly 7, and then the punching assembly 9 is moved to Figure 2 The position is determined by drilling a hole at the connection terminal of the casing core 10 to be tested by the drilling component 9, and then the screw 6 is screwed into the hole. Then the copper wire 5 is laid along the surface of the casing core 10 to be tested, and the copper wire 5 is fixed to the surface of the casing core 10 to be tested by epoxy glue until the copper wire 5 is close to the flange in the middle of the casing core 10 to be tested, and finally the high-voltage power supply 3 is turned on for detection. During the detection, the state quantities such as voltage, current, pressure, temperature, and image of the casing test process are obtained.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A dry casing defect model prototype, comprising a detection table (1), characterized in that: The upper surface of the test platform (1) is fixed with two support seats (2) for placing the sleeve core body (10) to be tested, a high-voltage power supply (3) is fixed on the side of the upper surface of the test platform (1), and a copper bus terminal (4) is provided on the outer side of the high-voltage power supply (3), the copper bus terminal (4) is fixedly connected with a copper wire (5), and the other end of the copper wire (5) is fixedly connected with a screw (6), a fixing component (7) for fixing the sleeve core body (10) to be tested is installed on the upper surface of the test platform (1) near the support seat (2), and a moving component (8) is provided on the upper surface of the test platform (1) and parallel to the support seat (2), and the moving end of the moving component (8) is fixedly connected with a punching component (9).

2. A dry casing defect model prototype according to claim 1, characterized in that: The top of the support seat (2) is provided with an arc-shaped positioning groove (21).

3. The dry casing defect model prototype according to claim 1, characterized in that: The fixing assembly (7) comprises a first L-shaped plate (71) fixed to the upper surface of the detection platform (1), a cylinder (72) being fixed to the top of the first L-shaped plate (71), and a pressing plate (73) being fixedly connected to the bottom telescopic end of the cylinder (72).

4. A dry casing defect model prototype according to claim 3, characterized in that: The pressing plate (73) is designed to be arc-shaped.

5. The dry casing defect model prototype according to claim 1, characterized in that: The punching assembly (9) comprises a second L-shaped plate (91), a top end of the second L-shaped plate (91) being fixed with an electric telescopic rod (92), a telescopic end of the electric telescopic rod (92) being fixedly connected to a motor (93), and a driving end of the motor (93) being fixedly connected to a drill bit (94).

6. A dry casing defect model prototype according to claim 5, characterized in that: The moving assembly (8) comprises a T-shaped guide rail (81) fixed to the upper surface of the detection platform (1), the surface of the T-shaped guide rail (81) is slidably connected to a slide seat (82), the second L-shaped plate (91) is fixed to the upper surface of the slide seat (82), and a locking bolt (83) is passed through and threadedly connected to the top wall of the slide seat (82).

7. A dry casing defect model prototype according to claim 6, characterized in that: The upper surface of the T-shaped guide rail (81) is provided with scale lines.

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