A boost ring for increasing the local field strength of a composite insulator and a method of using the same

Abstract

A boosting ring for increasing the local field strength of a composite insulator and a method for using the same, the boosting ring comprising a support arm structure, a fixed lasso and a boosting cone, the fixed lasso connecting a hollow metal support arm structure; a boosting cone is provided at the end of each support arm structure. A plurality of support arms are equidistantly distributed along the circumference of the circular lasso, and the lasso and the support arm are fixed by a knob. The fixed lasso is a circular ring structure, which is composed of two semicircular ring structure buckles, and the test object is fixed at the center of the ring. A plurality of support arms are used to increase the local field strength on the surface of the test object. The boosting cone is a square cone-shaped metal solid structure with good conductivity, and the boosting cone is in a vertical structure with the end of the support arm. The overall structure of the present invention is simple, light and practical, and has the functions of adjustable height and adjustable distance, which can meet the requirements of increasing the local field strength of different parts of insulators of different models.

Description

Technical Field

[0001] The invention belongs to the technical field of power equipment testing, and in particular relates to a boosting ring for improving the local field strength of a composite insulator and a use method thereof. Background Art

[0002] As the main external insulation equipment of the power system, composite insulators undertake the main insulation task. According to statistics, the consumption of composite insulators in my country has reached 9 million, and the earliest composite insulators have been in operation in the power grid for more than 30 years. With the increase in the number of composite insulators hanging on the grid and the increase in the number of years of operation, more and more failures have occurred. It is necessary to evaluate the aging status of the composite insulators in operation and propose corresponding improvement measures. At present, when the laboratory conducts accelerated aging tests on insulators, it is sometimes necessary to increase the local field strength of the insulator to achieve the purpose of accelerated aging. The current method of increasing the local field strength is to increase the voltage, but the voltage increase is always limited, especially the voltage increase of the entire insulator is more limited by equipment. The present invention provides a boost ring for increasing the local field strength of a composite insulator, which can be used to increase the local field strength without increasing the voltage. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the object of the present invention is to provide a local field strength boosting ring for testing which has a simple structure and strong applicability.

[0004] The present invention adopts the following technical solutions: A boost ring for improving the local field strength of a composite insulator, comprising a support arm structure, a fixing lasso and a boost cone;

[0005] The fixed lasso is connected to the support arm structure; a boost cone is arranged at the end of each support arm structure.

[0006] The fixing lasso is a circular ring structure, which is composed of two semicircular ring structure buckles, and the target composite insulator is fixed at the center of the ring.

[0007] The number of the support arm structures is greater than or equal to three, and they are evenly distributed along the circumference of the circular fixing lasso, and the fixing lasso and the support arm structure are fixed by a knob.

[0008] The boost cone is a square cone-shaped metal solid structure, and the boost cone and the end of the support arm structure are vertical structures.

[0009] Each support arm structure is composed of a distance adjustment component and a height adjustment component, and the distance adjustment component and the height adjustment component are sleeve-type retractable hollow structures.

[0010] One end of the distance adjustment component is connected to the fixed lasso, and the other end is connected to the height adjustment component, and the horizontal distance is fixed by an adjustment knob.

[0011] One end of the height adjustment component is connected to the distance adjustment component, and the other end is provided with a boost cone, and the vertical height is fixed by an adjustment knob.

[0012] The distance adjustment component and the height adjustment component are both provided with length scales, and the required distance can be adjusted by a fixed knob;

[0013] The smaller the distance between the boost cone and the target composite insulator, the greater the surface field strength of the target composite insulator;

[0014] The height adjustment component can make the surface field intensity of the part of the target composite insulator closest to the boost cone maximum;

[0015] For every 10mm the distance adjustment component moves closer to the target composite insulator, the surface field strength of the composite insulator increases by 0.2-0.4kV / mm.

[0016] The support arm structure is made of metal.

[0017] A method for using a boost ring for increasing the local field strength of a composite insulator comprises the following steps:

[0018] Step 1, fix the test object at the center of the circumference of the support arm structure by fixing the lasso;

[0019] Step 2: Ensure that each boost cone is at the same height and at the same horizontal distance from the surface of the test object by adjusting the distance adjustment component and the height adjustment component, and fix them by adjusting the knob after reaching the required setting value of the test;

[0020] Step 3: Apply the required voltage to the test sample and observe the operation of the test sample in the enhanced electric field environment.

[0021] The beneficial effect of the present invention is that, compared with the prior art, the present invention adopts a telescopic arm structure design and a hollow metal material, which ensures that the overall structure is simple, light and practical.

[0022] The invention has the functions of adjustable height and adjustable distance, and can meet the requirements of increasing the local field strength at different parts of insulators of different models. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a boost ring for improving the local field strength of a composite insulator according to the present invention;

[0024] Figure 2 It is a front view of a boost ring for improving the local field strength of a composite insulator according to the present invention;

[0025] Figure 3 The present invention is a schematic diagram of the test use of a boost ring for increasing the local field strength of a composite insulator.

[0026] The reference numerals are as follows:

[0027] 1-Support arm structure;

[0028] 2-Fixed lasso;

[0029] 3-boost cone;

[0030] 4-boost ring;

[0031] 5-Target Composite Insulator

[0032] 101- distance adjustment component;

[0033] 102- height adjustment component;

[0034] 103-Adjustment knob. DETAILED DESCRIPTION

[0035] The present application is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present application.

[0036] See Figures 1 to 3 The boost ring proposed in the present invention includes a support arm structure 1, a fixing lasso 2 and a boost cone 3.

[0037] The support arm structure 1 is preferably a telescopic adjustment bracket, which is used to adjust the vertical lifting height and horizontal extension distance of the booster cone; the number of the support arm structures 1 is greater than or equal to 3, and in this embodiment, the number of the support arm structures 1 is 8. The support arm structure 1 can be composed of a distance adjustment component 101 and a height adjustment component 102, and both the distance adjustment component 101 and the height adjustment component 102 are sleeve-type telescopic hollow structures to ensure portability.

[0038] The distance adjustment component 101 is a horizontal sleeve-type retractable hollow structure, one end of which is connected to the fixed lasso 2 and the other end is connected to the height adjustment component 102. The horizontal distance is fixed by the adjustment knob 103, which is used to adjust the distance between the boost cone 3 and the surface of the target object.

[0039] The height adjustment component 102 is a vertical sleeve-type retractable hollow structure, one end of which is connected to the distance adjustment component 101, and the other end is provided with a boost cone 3. The vertical height is fixed by an adjustment knob 103, which is used to adjust the height position of the boost cone 3 above the test object.

[0040] The distance adjustment component 101 and the height adjustment component 102 are both provided with length scales, and the required distance is adjusted by adjusting the knob 103 to ensure that the eight boost cones 3 are at the same height and at the same distance from the surface of the test object. The fixing lasso 2 is a circular ring structure, connected to the support arm structure 1, and is composed of two semicircular ring structure buckles, which are used to connect and fix to the test object to ensure that the eight telescopic arm mechanisms 1 can be symmetrically distributed around the target object; the boost cone 3 is a square cone, made of metal, and has a solid structure. A boost cone 3 is set at the end of each telescopic arm mechanism 1, and the eight boost cones 3 are symmetrically distributed in a circle to increase the local field strength on the surface of the target object.

[0041] A support arm structure 1 is provided in each of the multiple symmetrical directions of the fixed lasso 2, and is connected to the distance adjustment component 101 of the telescopic arm mechanism. The distance adjustment component 101 is connected to the fixed lasso 2 through a knob.

[0042] The support arm structure 1, the fixing lasso 2 and the boost cone 3 are all made of metal. The support arm structure 1 is a hollow sleeve structure, preferably made of aluminum alloy or pure aluminum. The boost cone 3 is a solid metal structure, preferably made of aluminum alloy, and both have good conductivity.

[0043] The method of use and working process of the present invention are as follows:

[0044] Step 1, fix the target object at the center of the circumference of the support arm structure 1 by fixing the lasso 2;

[0045] Step 2, determine the part of the target object where the field strength needs to be increased, adjust the height adjustment component 102 to ensure that all boost cones 3 are at the same height, so that the surface field strength of the part of the target object closest to the boost cone 3 is the largest, and then fix it by adjusting the knob 103.

[0046] The horizontal distance between the boost cone 3 and the target object is changed by the distance adjustment component 101 so that the local field strength of the target object reaches the required value, while ensuring that the distances between each boost cone 3 and the surface of the target object are the same, and then fixed by the adjustment knob 103.

[0047] Step 3: Apply the required voltage to the test sample and observe the operation of the test sample in the enhanced electric field environment.

[0048] Under the same conditions, the smaller the distance between the boost cone 3 and the target object, the greater the surface field strength of the target object, and vice versa. The height adjustment component 102 can make the surface field strength of the target object closest to the boost cone 3 the largest.

[0049] Principle of boost ring: The boost ring is connected to the high-voltage end of the test object, and guides the high-voltage end voltage to the specified part of the test object. The required field strength and specific position are adjusted through the distance adjustment component and the height adjustment component. The boost cone plays a role in enhancing the local field strength. The vertical and horizontal distances between the boost cone of the boost ring and the target insulator will affect the field strength changes brought by the voltage; compared with the height change, the horizontal distance change has a greater impact; for every 10mm change in height, the surface field strength changes by less than 0.1kV / mm; for every 10mm increase in horizontal distance, the surface field strength of the insulator will be enhanced by 0.2-0.4kV / mm.

[0050] As a preferred but non-limiting embodiment of the present invention: for 110kV composite insulators, the height of the boost ring can be adjusted in the range of 50mm-250mm, and the field strength is maximum when the horizontal distance between the boost cone 3 and the target object is 5mm. By adjusting the horizontal distance between the boost cone 3 and the target object, the local field strength of the composite insulator can be controlled within the range of 8kV / cm-12kV / cm.

[0051] For 220kV composite insulators, the height of the boost ring can be adjusted in the range of 50mm-300mm; the field strength is maximum when the horizontal distance between the boost cone 3 and the target object is 50mm; by adjusting the horizontal distance between the boost cone 3 and the target object, the local field strength of the composite insulator can be controlled within the range of 10kV / cm-15kV / cm.

[0052] For 500kV composite insulators, the height of the boost ring can be adjusted in the range of 50mm-350mm. The field strength is maximum when the horizontal distance between the boost cone 3 and the target object is 50mm. By adjusting the horizontal distance between the boost cone 3 and the target object, the local field strength of the composite insulator can be controlled within the range of 12kV / cm-18kV / cm.

[0053] The applicant of the present invention has made a detailed explanation and description of the implementation examples of the present invention in conjunction with the drawings in the specification. However, those skilled in the art should understand that the above implementation examples are only preferred implementation schemes of the present invention, and the detailed description is only to help readers better understand the spirit of the present invention, but not to limit the scope of protection of the present invention. On the contrary, any improvements or modifications based on the inventive spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. A boost ring for increasing the local field strength of a composite insulator, characterized in that: The boost ring comprises a support arm structure (1), a fixing lasso (2) and a boost cone (3); The fixing lasso (2) is connected to the support arm structure (1); a boost cone (3) is provided at the end of each support arm structure (1); Each support arm structure (1) is composed of a distance adjustment component (101) and a height adjustment component (102), and the distance adjustment component (101) and the height adjustment component (102) are telescopic hollow structures; One end of the distance adjustment component (101) is connected to the fixed lasso (2), and the other end is connected to the height adjustment component (102), and the horizontal distance is fixed by adjusting the knob on the distance adjustment component (101); One end of the height adjustment component (102) is connected to the distance adjustment component (101), and the other end is provided with a boost cone (3). The vertical height is fixed by adjusting a knob on the height adjustment component (102).

2. A boost ring for improving the local field strength of a composite insulator according to claim 1, characterized in that: The fixing lasso (2) is a circular ring structure, which is composed of two semicircular ring structure buckles, and the target composite insulator is fixed at the center of the ring.

3. A boost ring for improving the local field strength of a composite insulator according to claim 1, characterized in that: The number of the support arm structures (1) is greater than or equal to three, and they are evenly distributed along the circumference of the circular fixing lasso (2), and the fixing lasso (2) and the support arm structure (1) are fixed by a knob.

4. The boost ring for improving the local field strength of a composite insulator according to claim 1, characterized in that: The boost cone (3) is a square cone-shaped solid metal structure, and the boost cone (3) and the end of the support arm structure (1) are in a vertical structure.

5. The boost ring for improving the local field strength of a composite insulator according to claim 1, characterized in that: The distance adjustment component (101) and the height adjustment component (102) are both provided with length scales, and the required horizontal distance and vertical height are adjusted by means of fixed knobs; The smaller the distance between the boost cone (3) and the target composite insulator, the greater the surface field intensity of the target composite insulator; The height adjustment component (102) can make the surface field intensity of the part of the target composite insulator closest to the boost cone (3) maximum; Every time the distance adjustment component (101) approaches the target composite insulator by 10 mm, the surface field intensity of the composite insulator is enhanced by 0.2-0.4 kV / mm.

6. A boost ring for improving the local field strength of a composite insulator according to claim 1, characterized in that: The support arm structure is made of metal.

7. A method for using a boost ring for improving the local field strength of a composite insulator according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, fix the test object at the center of the circumference of the support arm structure (1) by using a fixing lasso (2); Step 2, by adjusting the distance adjustment component (101) and the height adjustment component (102), ensure that the boost cones (3) are at the same height and at the same horizontal distance from the surface of the test object, and after reaching the required setting value of the test, fix them by adjusting the knobs on the distance adjustment component (101) and the height adjustment component (102); Step 3: Apply the required voltage to the test sample and observe the operation of the test sample in the enhanced electric field environment.

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