A lightning protection mechanism and a porcelain insulator provided with the mechanism

Abstract

The utility model discloses a lightning protection mechanism and porcelain insulator with the mechanism relates to porcelain insulator lightning protection field, including porcelain insulator main part, the outside of porcelain insulator main part is provided with the arc guide bar, the inside of arc guide bar is provided with the discharge distance adjusting mechanism, the discharge distance adjusting mechanism includes fixed sleeve, the fixed sleeve is inserted in the inside of arc guide bar, the first through slot is seted outside fixed sleeve, the number of first through slot is provided with a plurality of, and a plurality of first through slots linear arrangement along fixed sleeve axle core parallel, through setting the discharge distance adjusting mechanism, the insulating operating rod pushes the plug inclined bar of arc guide bar outside extension, and the elastic deformation space of sufficient position ball is left out from first through slot, and the locking of fixed sleeve is released, makes it push fixed sleeve adjustment discharge gap, and then in the whole adjustment process does not need to dismantle fastener, reduces the degree of complexity and time length of high altitude operation, reduces the risk because of long -time live operation.

Description

Technical Field

[0001] This utility model relates to the field of lightning protection for porcelain insulators, and in particular to a lightning protection mechanism and a porcelain insulator equipped with the mechanism. Background Technology

[0002] Porcelain insulators equipped with lightning protection mechanisms ensure line insulation during normal operation, actively initiate arc discharge when encountering extreme overvoltages such as lightning strikes, and ensure reliable protection performance through automatic adjustment functions. It is a type of "active defense" protection device.

[0003] In the existing technology, the device connects the upper end of the arc-starting rod to the upper metal cap via a threaded connection. The lower end of the arc-starting rod has an adjustment bolt hole, and the adjustment bolt is threaded to the lower end of the arc-starting rod, so that a discharge gap is formed between the adjustment bolt and the lower metal foot 5. However, in actual practice, when adjusting the discharge gap, it is usually necessary for professionals to use special tools (such as wrenches) to loosen the fasteners, move the electrode, and then re-tighten them. As a result, the entire high-altitude operation adjustment process is cumbersome and time-consuming, and the long-term live operation is highly risky.

[0004] Therefore, it is necessary to propose a lightning protection mechanism and a porcelain insulator equipped with such a mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a lightning protection mechanism and a porcelain insulator equipped with the mechanism, so as to solve the problems of existing lightning protection mechanisms requiring special tools to adjust the discharge gap, cumbersome and time-consuming high-altitude operations, and high risks of long-term live operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lightning protection mechanism and a porcelain insulator equipped with the mechanism, comprising a porcelain insulator body, an arc-guiding rod disposed on the outer side of the porcelain insulator body, and a discharge distance adjustment mechanism disposed inside the arc-guiding rod;

[0007] The discharge distance adjustment mechanism includes a fixed sleeve inserted inside the arc-initiating rod. The fixed sleeve has multiple first through slots arranged parallel to each other along the axis of the fixed sleeve. A discharge ball is fixedly connected to the end face of the fixed sleeve away from the arc-initiating rod. A limit rod is fixedly connected to the inner wall of the arc-initiating rod. A limit slot is formed at the corresponding position of the fixed sleeve and the limit rod. The fixed sleeve is slidably connected to the outside of the limit rod. A support rod is fixedly connected to the inner wall of the arc-initiating rod. A spring pressure plate is fixedly connected to the upper surface of the support rod. A positioning ball is fixedly connected to the side of the spring pressure plate near the first through slot of the fixed sleeve. The positioning ball is inserted into the first through slot of the fixed sleeve. A slidable insert rod is slidably connected inside the arc-initiating rod, with a portion of the slidable insert rod extending out and abutting between the support rod and the spring pressure plate.

[0008] Preferably, the outer side of the porcelain insulator body is glued with an upper metal cap, and the arc-starting rod is threaded into the inside of the upper metal cap.

[0009] Preferably, the outer side of the porcelain insulator body is glued with a lower metal foot, and an arc-starting head is fixedly connected to the side of the lower metal foot near the arc-starting rod.

[0010] Preferably, a connecting plate is fixedly connected to the upper surface of the porcelain insulator body.

[0011] Preferably, a connecting screw head is fixedly connected to the end face of the porcelain insulator body away from the connecting plate.

[0012] This utility model also discloses a porcelain insulator with a lightning protection mechanism, including the lightning protection mechanism.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. In this utility model, the discharge distance adjustment mechanism is set up so that the insulating operating rod pushes the inclined rod extending outward from the arc-initiating rod, leaving enough elastic deformation space for the positioning ball to disengage from the first through groove, releasing the locking of the fixed sleeve, and allowing it to push the fixed sleeve to adjust the discharge gap. Thus, there is no need to disassemble the fasteners during the entire adjustment process, reducing the tediousness and time of high-altitude operations and reducing the risk of long-term live operation.

[0015] 2. Furthermore, the upper end of the arc-starting rod is connected to the upper metal cap via a thread, allowing for significant adjustment of the arc-starting rod's position during installation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the lightning protection mechanism of this utility model and the appearance structure of the porcelain insulator equipped with the mechanism.

[0017] Figure 2 This is a front cross-sectional view of the lightning protection mechanism of this utility model and the porcelain insulator equipped with the mechanism.

[0018] Figure 3 This is a schematic diagram of the unfolded structure of the discharge distance adjustment mechanism of this utility model.

[0019] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Porcelain insulator body; 2. Connecting plate; 3. Connecting screw head; 4. Lower metal foot; 5. Arc-starting head; 6. Upper metal cap; 7. Arc-starting rod; 8. Discharge distance adjustment mechanism; 81. Fixing sleeve; 82. Discharge ball; 83. Limiting rod; 84. Support rod; 85. Spring pressure plate; 86. Positioning ball; 87. Insertion diagonal rod. Detailed Implementation

[0021] This utility model provides, for example Figures 1-4 The lightning protection mechanism and the porcelain insulator equipped with the mechanism shown are designed to solve the problems of existing lightning protection mechanisms requiring special tools, cumbersome and time-consuming high-altitude operations, and high risks of long-term live operation when adjusting the discharge gap. Through the structural design of the discharge gap adjustment mechanism, convenient adjustment and safe locking of the discharge gap can be achieved, while ensuring the overall insulation performance and lightning protection reliability of the porcelain insulator. It is suitable for insulation and lightning protection scenarios of high-voltage transmission lines.

[0022] It consists of three parts: the porcelain insulator body 1, the connection and fixing components, and the lightning protection core components.

[0023] The porcelain insulator body 1, as the core insulating carrier of the device, is made of high-strength porcelain material. It has excellent insulation performance, mechanical strength and weather resistance. It can block leakage current in high-voltage transmission lines and withstand external loads such as line tension, wind and rain impact, and temperature changes, so as to avoid structural damage caused by external forces or environmental factors and provide basic support for the stable operation of the entire device.

[0024] The connecting plate 2, fixedly connected to the upper surface of the porcelain insulator body 1, is made of stainless steel and has pre-drilled mounting holes on its surface. Its function is to fix the porcelain insulator to structures such as transmission towers and line supports via bolts, achieving high-altitude positioning of the porcelain insulator. The bolts are used in conjunction with anti-loosening washers to prevent loosening of the connection due to vibration during long-term operation.

[0025] The connecting screw head 3 is located on the lower end face of the porcelain insulator body 1. It is integrally formed with the body or fixed by high-strength adhesive. The outer surface is machined with standard threads for threaded connection with components such as the equipment base and grounding device below, further enhancing the installation stability of the porcelain insulator.

[0026] The upper metal cap 6 and the lower metal foot 4 are both fixed to the outside of the porcelain insulator body 1 by high-temperature adhesive bonding process. They are located at the upper and lower ends of the body respectively. The inner wall of the upper metal cap 6 is machined with internal threads to provide a threaded installation interface for the arc-starting rod 7, and at the same time, it serves as a conduction node for lightning current. The lower metal foot 4 is welded with an arc-starting head 5 on the side near the arc-starting rod 7. The arc-starting head 5 is made of high-conductivity copper alloy and forms a discharge gap with the discharge ball 82. When the line encounters a lightning strike and generates an overvoltage, it can guide the lightning current to discharge through the gap, preventing the porcelain insulator body 1 from being broken down.

[0027] The arc-inducing rod 7 adopts a metal rod structure. The upper end is connected to the upper metal cap 6 by a thread, and the lower end is an open design. It houses all the components of the discharge distance adjustment mechanism 8. Its function is to serve as a conduction channel for lightning current, transferring the lightning current at the discharge ball 82 to the lower metal foot 4, and then conducting it to the ground through the grounding path.

[0028] The fixed sleeve 81 in the discharge gap adjustment mechanism 8 is a hollow cylindrical metal structure, which is inserted into the arc-initiating rod 7. Multiple first through slots are opened parallel to each other along the axial direction on the outside. The spacing between the slots is set according to the discharge gap adjustment accuracy requirements. A discharge ball 82 is welded to the end of the fixed sleeve 81 away from the arc-initiating rod 7. It can slide synchronously with the fixed sleeve 81. By changing the position of the fixed sleeve 81, the discharge gap between the discharge ball 82 and the arc-initiating head 5 can be adjusted. The side wall of the fixed sleeve 81 is also provided with a limiting groove that matches the limiting rod 83, ensuring that the fixed sleeve 81 slides only along the axial direction of the arc-initiating rod 7, avoiding rotation that would cause the discharge ball 82 and the arc-initiating head 5 to be misaligned. The limiting rod 83 is a metal round rod with one end welded to the inner wall of the arc-initiating rod 7 and the other end extending into the limiting groove of the fixed sleeve 81, which slides in cooperation with the limiting groove.

[0029] The support rod 84 is an L-shaped metal bracket welded to the inner wall of the arc-initiating rod 7 to support the spring pressure plate 85. The spring pressure plate 85 is made of spring steel with a moderate elastic coefficient. One end is fixed to the upper surface of the support rod 84, and the other end extends towards the fixing sleeve 81. It has good elastic deformation ability and can apply a continuous pressing force to the positioning ball 86 in its natural state to ensure that the positioning ball 86 is stably engaged in the first through groove of the fixing sleeve 81.

[0030] The positioning ball 86 is made of hard, wear-resistant metal ball, which is fixed to the side of the spring pressure plate 85 near the fixed sleeve 81 by welding or strong adhesive. Its diameter matches the width of the first through groove of the fixed sleeve 81. Its function is to lock the position of the fixed sleeve 81 by snapping it into the first through groove at different positions, thereby fixing the size of the discharge gap and preventing the fixed sleeve 81 from sliding due to vibration or external force during operation.

[0031] The inclined rod 87 is a metal rod structure that is slidably connected to a pre-set through hole on the side wall of the arc-inducing rod 7. Part of the rod extends out of the outer surface of the arc-inducing rod 7 for operation, and the other end abuts against the support rod 84 and the spring pressure plate 85. Its core function is to limit the deformation of the spring pressure plate 85 in the fixed state, preventing the positioning ball 86 from dislodging from the first through slot due to vibration, discharge impact, or other factors. When adjusting the gap, the inclined rod 87 is pushed away from the spring pressure plate 85, so that when it pushes the fixing sleeve 81, it provides sufficient elastic deformation space for the positioning ball 86 to dislodge from the first through slot, thereby releasing the locking of the fixing sleeve 81.

[0032] Furthermore, during use, when the line voltage level changes, or the operating environment changes (such as increased humidity, altitude, or increased lightning tripping frequency), and the discharge gap needs to be adjusted, the operator does not need to carry special tools such as wrenches. They only need to push the inclined rod 87 extending from the outside of the arc-starting rod 7 using the insulated operating rod. This pushes the inclined rod 87 into the arc-starting rod 7, moving it away from the spring pressure plate 85. When pushing the fixed sleeve 81, sufficient elastic deformation space is provided for the positioning ball 86 to disengage from the first through slot, releasing the locking of the fixed sleeve 81. Then, the lower end of the fixed sleeve 81 is pushed or pulled using the hook or anti-slip clamp of the insulated operating rod. If the discharge gap needs to be increased, the fixed sleeve 81 is pushed upward, causing the discharge ball 82 to move into the arc-starting rod 7, increasing the distance between the discharge ball 82 and the arc-starting head 5. If the discharge gap needs to be decreased, the fixed sleeve 81 is pulled downward, causing the discharge ball 82 to move towards the arc-starting head 5, reducing the distance between them.

[0033] During the adjustment process, the size of the discharge gap can be measured in real time using an insulation rangefinder until the target value is reached. After confirming that the gap meets the requirements, the inclined rod 87 is reset so that the spring pressure plate 85 returns to its original state, which drives the positioning ball 86 to re-engage in the first through slot at the corresponding position of the fixed sleeve 81. The position of the fixed sleeve 81 is locked again, and the discharge gap adjustment is completed. The entire process does not require disassembling fasteners, reducing the tediousness and time of high-altitude operations and lowering the risk of prolonged live operation.

Claims

1. A lightning protection mechanism, comprising a porcelain insulator body (1), characterized in that: An arc-guiding rod (7) is provided on the outside of the porcelain insulator body (1), and a discharge adjustment mechanism (8) is provided inside the arc-guiding rod (7). The discharge distance adjustment mechanism (8) includes a fixed sleeve (81), which is inserted into the inside of the arc-initiating rod (7). The fixed sleeve (81) has a first through groove on its outside. The number of first through grooves is set to be multiple, and the multiple first through grooves are arranged in parallel and linearly along the axis of the fixed sleeve (81). A discharge ball (82) is fixedly connected to the end face of the fixed sleeve (81) away from the arc-initiating rod (7). A limit rod (83) is fixedly connected to the inner wall of the arc-initiating rod (7). A limit groove is opened at the corresponding position of the fixed sleeve (81) and the limit rod (83). The fixed sleeve (81) is slidably connected. Outside the limiting rod (83), a support rod (84) is fixedly connected to the inner wall of the arc-inducing rod (7). A spring pressure plate (85) is fixedly connected to the upper surface of the support rod (84). A positioning ball (86) is fixedly connected to the side of the spring pressure plate (85) near the first through groove of the fixed sleeve (81). The positioning ball (86) is inserted into the first through groove of the fixed sleeve (81). An inclined rod (87) is slidably connected inside the arc-inducing rod (7). The inclined rod (87) extends out and abuts between the support rod (84) and the spring pressure plate (85).

2. The lightning protection mechanism according to claim 1, characterized in that: The outer side of the porcelain insulator body (1) is glued with an upper metal cap (6), and the arc-leading rod (7) is threaded into the inside of the upper metal cap (6).

3. A lightning protection mechanism according to claim 2, characterized in that: The outer side of the porcelain insulator body (1) is glued with a lower metal foot (4), and an arc-starting head (5) is fixedly connected to the side of the lower metal foot (4) near the arc-starting rod (7).

4. A lightning protection mechanism according to claim 3, characterized in that: A connecting plate (2) is fixedly connected to the upper surface of the porcelain insulator body (1).

5. A lightning protection mechanism according to claim 4, characterized in that: A connecting screw (3) is fixedly connected to one end face of the porcelain insulator body (1) away from the connecting plate (2).

6. A porcelain insulator equipped with a lightning protection mechanism, characterized in that, Includes the lightning protection mechanism described in any one of claims 1-5.

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