Anti-falling bolt for oil type transformer
By designing a removable anti-fall bolt, the combination of interlaced connecting rods and springs solves the problem that the existing anti-fall bolt cannot be removed, reducing maintenance costs and time, and improving the reliability and safety of the transformer.
Patent Information
- Application Number
- CN202422354166.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing anti-fall bolts cannot be disassembled in oil-immersed transformers, resulting in increased maintenance costs and time.
An anti-fall bolt including studs, nuts, through-grooves, interlaced connecting rods, anti-falling rods, pressing rods, auxiliary plates and springs are designed. Put the anti-removal rod close to install or remove the nut and prevent the nut from falling off under the action of the spring.
The detachability of anti-fall bolts is achieved, reducing maintenance costs and time, and ensuring the reliability and safety of the transformer.
Smart Images
Figure CN223019161U_ABST
Abstract
Description
Technical Field
[0001] The utility model provides an anti - shedding bolt for an oil - immersed transformer, belonging to the technical field of transformer installation. Background Art
[0002] An oil - immersed transformer is an electrical equipment widely used in the power system. Its core components include an iron core, windings, and an oil tank. It improves the heat dissipation efficiency and insulation performance by immersing the windings in insulating oil. The oil - immersed transformer uses the principle of electromagnetic induction to convert the input voltage into output voltages of different levels, and is applicable to the step - up and step - down links in the power transmission and distribution systems. The transformer oil filled in the oil tank not only plays a cooling role, but also enhances the insulation performance of the transformer, reducing the loss of electrical equipment. Due to its high efficiency, strong reliability, and low maintenance cost, the oil - immersed transformer occupies an important position in the power industry.
[0003] Currently, since the transformer will generate vibrations during operation, ordinary bolts may become loose or fall off due to the vibrations. In order to improve the reliability of the entire transformer and prevent component damage caused by bolt shedding, and even serious accidents such as short - circuits, anti - shedding bolts are required. However, the existing anti - shedding bolt structures are relatively complex and are all disposable. When internal maintenance of the transformer is required, the bolts need to be damaged for disassembly, which increases the maintenance cost and time. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is that the existing anti - shedding bolts are all installed once and cannot be disassembled, which is not suitable for transformers.
[0005] In order to solve the above problems, the technical solution proposed by the utility model is: an anti - shedding bolt for an oil - immersed transformer, including a stud and a nut; through slots are provided in the middle of the stud and the nut, two staggered connecting rods are rotatably arranged in the middle of the through slots, one end of the connecting rod protrudes from the end of the stud and an anti - shedding rod is provided on one side of the end, the other end of the connecting rod protrudes from the end of the nut and a pressing rod is provided on the other side of the end, an auxiliary plate is provided on the outer side of the pressing rod, a connecting column is provided in the middle of one side of the auxiliary plate facing the opposite auxiliary plate, and the two connecting columns are respectively inserted into the two ends of a spring.
[0006] As an improvement, the end directions of the two anti - shedding rods at the same end are opposite;
[0007] As an improvement, the end directions of the two pressing rods at the same end are opposite;
[0008] As an improvement, the outer diameter of the connecting column is the same as the inner diameter of the spring;
[0009] As an improvement, when the spring is in a normal state, the end of the anti - shedding rod exceeds the outer edge of the stud.
[0010] Advantages of the present utility model:
[0011] By pressing two pressing rods, the two connecting rods can be driven to rotate, so that the two anti - detachment rods approach each other, and thus the nut can be installed or disassembled. When the pressing rods are not pressed, under the action of the spring, the two pressing rods will move away from each other. Under the action of the two connecting rods, the two anti - detachment rods will also move away from each other, so that the end of the anti - detachment rod exceeds the outer edge of the stud, and thus the nut can be prevented from falling off. Description of the Drawings
[0012] Figure 1 It is a schematic structural view of an anti - detachment bolt used in an oil - immersed transformer of the present utility model.
[0013] Figure 2 It is a sectional view of an anti - detachment bolt used in an oil - immersed transformer of the present utility model.
[0014] Figure 3 It is a state schematic view of an anti - detachment bolt used in an oil - immersed transformer of the present utility model.
[0015] 1. Stud; 2. Nut; 3. Through - slot; 4. Connecting rod; 5. Anti - detachment rod; 6. Pressing rod; 7. Auxiliary plate; 8. Connecting column; 9. Spring. Specific Embodiment
[0016] The present utility model will be further described below with reference to the drawings.
[0017] According to Figure 1 —3 shown: The present utility model provides an anti - detachment bolt used in an oil - immersed transformer, including a stud 1 and a nut 2. A through - slot 3 is provided in the middle of the stud 1 and the nut 2. Two intersecting connecting rods 4 are rotatably provided in the middle of the through - slot 3. One end of the connecting rod 4 protrudes from the end of the stud 1 and an anti - detachment rod 5 is provided on one side of the end. The other end of the connecting rod 4 protrudes from the end of the nut 2 and a pressing rod 6 is provided on the other side of the end. An auxiliary plate 7 is provided outside the pressing rod 6. A connecting column 8 is provided in the middle of one side of the auxiliary plate 7 facing the opposite auxiliary plate 7. The two connecting columns 8 are respectively inserted into the two ends of a spring 9. When the spring 9 is in a normal state, the end of the anti - detachment rod 5 exceeds the outer edge of the stud 1. The end directions of the two anti - detachment rods at the same end are opposite. The end directions of the two pressing rods 6 at the same end are opposite. By pressing the two pressing rods 6, the two connecting rods 4 can be driven to rotate, so that the two anti - detachment rods 5 approach each other, and thus the nut can be installed or disassembled. When the pressing rods 6 are not pressed, under the action of the spring 9, the two pressing rods 6 will move away from each other. Under the action of the two connecting rods 4, the two anti - detachment rods 5 will also move away from each other, so that the end of the anti - detachment rod 5 exceeds the outer edge of the stud 1, and thus the nut can be prevented from falling off.
[0018] Among them, the outer diameter of the connecting column 8 is the same as the inner diameter of the spring 9; this can prevent the spring 9 from falling off.
[0019] Principle of the utility model: During use, first press the two pressing rods 6 to rotate the two connecting rods 4, so that the two anti - detachment rods 5 approach each other. In this way, the ends of the two anti - detachment rods 5 do not exceed the outer edge of the stud 1. Then insert the stud 1 into the installation hole. Next, put the gasket on the stud 1, and then screw in the nut and tighten it so that the end face of the nut coincides with the end face of the stud 1. Then release the two pressing rods 6. Under the action of the spring 9, the two pressing rods 6 will move away from each other. Under the action of the two connecting rods 4, the two anti - detachment rods 5 will also move away from each other, so that the ends of the anti - detachment rods 5 exceed the outer edge of the stud 1, thus preventing the nut from falling off.
[0020] When it is necessary to repair the transformer and disassemble the bolt, press the two pressing rods 6 so that the ends of the two anti - detachment rods 5 do not exceed the outer edge of the stud 1. In this way, the nut can be unscrewed. Then remove the gasket and pull out the bolt.
[0021] The above describes the present utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the creative purpose of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.
Claims
1. An anti-drop bolt for an oil-type transformer, comprising a stud (1) and a nut (2); characterized in that: A through slot (3) is provided in the middle of the stud (1) and the nut (2); two staggered connecting rods (4) are rotatably provided in the middle of the through slot (3); one end of the connecting rod (4) protrudes from the end of the stud (1) and an anti-dropping rod (5) is provided on one side of the end; the other end of the connecting rod (4) protrudes from the end of the nut (2) and a pressing rod (6) is provided on the other side of the end; an auxiliary plate (7) is provided on the outer side of the pressing rod (6); a connecting column (8) is provided in the middle of one side of the auxiliary plate (7) facing the opposite auxiliary plate (7); and the two connecting columns (8) are respectively inserted into the two ends of the spring (9).
2. The anti-drop bolt for oil-fired transformer according to claim 1 is characterized in that: The ends of the two anti-slip rods (5) at the same end are in opposite directions.
3. The anti-drop bolt for oil-fired transformer according to claim 1 is characterized in that: The ends of the two pressing rods (6) at the same end are in opposite directions.
4. The anti-drop bolt for oil-fired transformer according to claim 1 is characterized in that: The outer diameter of the connecting column (8) is the same as the inner diameter of the spring (9).
5. The anti-drop bolt for oil-fired transformer according to claim 1 is characterized in that: When the spring (9) is in a normal state, the end of the anti-drop rod (5) exceeds the outer edge of the stud (1).