Force-bearing type line lightning arrester

Abstract

The utility model relates to the technical field of lightning arresters, and discloses a force-bearing type line lightning arrester which comprises a ceramic sleeve, a pressure-bearing assembly is arranged in the ceramic sleeve, a lightning protection assembly is arranged in the pressure-bearing assembly, the pressure-bearing assembly comprises a lower sleeve, the lower sleeve is fixedly sleeved on the inner wall of the lower end of the ceramic sleeve, and the lightning protection assembly is arranged in the lower sleeve. The utility model discloses a lightning arrester pressure-bearing assembly which comprises a lower sleeve, a pressure-bearing sleeve is movably sleeved in the lower sleeve, a rubber ring is movably sleeved on the outer wall of the pressure-bearing sleeve, and an upper sleeve is clamped at the upper end of the lower sleeve, and has the beneficial effects that through the arrangement of the pressure-bearing assembly consisting of the lower sleeve, the pressure-bearing sleeve, the upper sleeve and a clamping ring, when the upper end and the lower end of the lightning arrester are subjected to external pressure, the pressure-bearing sleeve is clamped on the upper end of the lower sleeve; the pressure-bearing sleeve can generate certain movable displacement along the inner wall of the lower sleeve, and can effectively absorb and disperse the impact force in cooperation with the buffer effect of the rubber ring, thereby preventing the ceramic sleeve from directly bearing external force impact and breaking, remarkably reducing the failure and fire risk of the lightning arrester caused by the damage of the ceramic sleeve, and prolonging the overall service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of surge arrester technology, specifically a load-bearing line surge arrester. Background Technology

[0002] Line surge arresters are key devices in power systems that protect transmission lines from lightning overvoltage damage. Although traditional line surge arresters can achieve the function of lightning protection, the external ceramic sleeve is mostly a fixed installation structure. When the upper and lower ends of the surge arrester are subjected to external pressure due to line tension, wind sway, or installation operations, the impact load can easily act directly on the ceramic sleeve, causing the ceramic sleeve to crack, which in turn leads to the failure of the surge arrester. In some cases, the exposure of internal components may even cause safety risks such as short circuits and fires, affecting the stable operation of the power system.

[0003] For example, a load-bearing line arrester with publication number CN220020769U can withstand mechanical stress and has reliable electrical contact at the resistor element interface, which can effectively reduce the possibility of side flashover of the resistor element. However, the external ceramic sleeve of the arrester is fixedly installed. When the upper and lower ends of the arrester are subjected to external pressure, the impact can easily cause the ceramic sleeve to break, which can easily lead to arrester failure and fire. Utility Model Content

[0004] The purpose of this utility model is to provide a load-bearing line surge arrester to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a load-bearing line surge arrester, comprising a ceramic sleeve, wherein a pressure-bearing component is disposed inside the ceramic sleeve, and a surge arresting component is disposed inside the pressure-bearing component;

[0006] The pressure-bearing component includes a lower sleeve, which is fixedly sleeved on the lower inner wall of the ceramic sleeve. A pressure-bearing sleeve is movably sleeved inside the lower sleeve. A rubber ring is movably sleeved on the outer wall of the pressure-bearing sleeve. An upper sleeve is snapped onto the upper end of the lower sleeve. A snap-fit ​​ring is fixedly sleeved on the inner wall of the upper sleeve.

[0007] Preferably, an annular groove is formed on the upper outer wall of the pressure-bearing sleeve, and the rubber ring is engaged inside the annular groove.

[0008] Preferably, the snap ring is movably sleeved in the annular groove, and the inner wall of the snap ring matches the annular groove.

[0009] Preferably, both the lower sleeve and the upper sleeve are located inside the ceramic sleeve.

[0010] Preferably, the lightning protection assembly includes a lower locking block and an upper locking block. The lower locking block is locked onto the lower inner wall of the lower sleeve. A lower contact is embedded in the center of the lower locking block, and a plurality of resistors are fixedly connected to the upper end of the lower contact. The upper locking block is locked onto the upper inner wall of the upper sleeve. An upper contact is embedded in the center of the upper locking block, and a spark gap is fixedly connected to the lower end of the upper contact.

[0011] Preferably, a spring wire is fixedly connected to the lower end of the spark gap, and the lower end of the spring wire is fixedly connected to the upper surface of the resistor sheet.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up a pressure-bearing assembly consisting of a lower sleeve, a pressure-bearing sleeve, an upper sleeve, and a snap ring, when the upper and lower ends of the surge arrester are subjected to external pressure, the pressure-bearing sleeve can generate a certain displacement along the inner wall of the lower sleeve. Combined with the buffering effect of the rubber ring, it can effectively absorb and disperse the impact force, avoid the ceramic sleeve from being directly subjected to external impact and breaking, significantly reduce the failure of the surge arrester and the risk of fire caused by damage to the ceramic sleeve, and extend the overall service life of the equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the pressure-bearing sleeve structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the snap ring structure of this utility model;

[0017] Figure 5 This is a partial structural diagram of the lightning protection component of this utility model.

[0018] In the diagram: 1. Ceramic sleeve; 2. Pressure-bearing component; 21. Lower sleeve; 22. Pressure-bearing sleeve; 23. Rubber ring; 24. Upper sleeve; 25. Snap-fit ​​ring; 26. Ring groove; 3. Lightning protection component; 31. Lower locking block; 32. Lower contact; 33. Resistor element; 34. Upper locking block; 35. Upper contact; 36. Spark gap; 37. Spring wire. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-5 The present invention provides the following technical solution:

[0021] Example 1: A load-bearing line surge arrester includes a ceramic sleeve 1, a pressure-bearing component 2 is disposed inside the ceramic sleeve 1, and a surge arresting component 3 is disposed inside the pressure-bearing component 2;

[0022] The pressure-bearing component 2 includes a lower sleeve 21, which is fixedly sleeved on the lower inner wall of the ceramic sleeve 1. A pressure-bearing sleeve 22 is movably sleeved inside the lower sleeve 21. A rubber ring 23 is movably sleeved on the outer wall of the pressure-bearing sleeve 22. An upper sleeve 24 is snapped onto the upper end of the lower sleeve 21. A snap ring 25 is fixedly sleeved on the inner wall of the upper sleeve 24.

[0023] An annular groove 26 is provided on the upper outer wall of the pressure-bearing sleeve 22. The rubber ring 23 is snapped into the annular groove 26. The annular groove 26 is provided on the upper outer wall of the pressure-bearing sleeve 22, providing a precise installation and positioning space for the rubber ring 23. This prevents the rubber ring 23 from axially displacing or falling off during the sliding process of the pressure-bearing sleeve 22, ensuring that the rubber ring 23 is always in the preset working position. At the same time, the groove structure of the annular groove 26 can guide and limit the subsequent assembly of the snap ring 25, so that the snap ring 25 can be stably fitted in the annular groove 26, realizing the movable connection between the upper sleeve 24 and the pressure-bearing sleeve 22.

[0024] The snap ring 25 is movably sleeved in the annular groove 26, and the inner wall of the snap ring 25 matches the annular groove 26. The snap ring 25 is fixedly sleeved on the inner wall of the upper sleeve 24. Its design of movably sleeved in the annular groove 26 realizes the flexible connection between the upper sleeve 24 and the pressure-bearing sleeve 22, which ensures that the two will not separate, and allows the pressure-bearing sleeve 22 to slide slightly along the axial direction, providing displacement buffer space for the pressure-bearing assembly 2.

[0025] Both the lower sleeve 21 and the upper sleeve 24 are located inside the ceramic sleeve 1. The ceramic sleeve 1 serves as the external insulating shell of the surge arrester, possessing excellent insulation performance and a certain mechanical strength. The lower sleeve 21 and the upper sleeve 24 are located inside it, which can prevent them from being directly exposed to the external environment.

[0026] During use, external force is first transmitted to the upper and lower connecting ends of the surge arrester, and further transmitted to the upper sleeve 24 and lower sleeve 21 inside. The upper sleeve 24 and lower sleeve 21 serve as the core support structure of the pressure-bearing assembly 2. The lower sleeve 21 is fixedly sleeved on the inner wall of the lower end of the ceramic sleeve 1, providing stable bottom support for the entire pressure-bearing assembly. The upper sleeve 24 engages with the annular groove 26 of the pressure-bearing sleeve 22 through the snap ring 25, causing the pressure-bearing sleeve 22 to slide slightly axially along the inner wall of the lower sleeve 21. During this process, the rubber ring 23 in the annular groove 26 is compressed, using its elastic deformation to absorb part of the impact force, while limiting the sliding range of the pressure-bearing sleeve 22 to avoid excessive displacement leading to structural damage. Through the displacement buffer of the pressure-bearing assembly 2 and the elastic damping of the rubber ring 23, most of the impact force is consumed, and the ceramic sleeve 1 only bears a very small indirect force, thereby effectively preventing the ceramic sleeve 1 from breaking and ensuring the integrity of the surge arrester shell.

[0027] Example 2: The technical solution of this example, which differs from that of Example 1, includes: the lightning protection component 3 includes a lower locking block 31 and an upper locking block 34. The lower locking block 31 is locked onto the lower inner wall of the lower sleeve 21. A lower contact 32 is embedded in the center of the lower locking block 31. A plurality of resistor pieces 33 are fixedly connected to the upper end of the lower contact 32. The upper locking block 34 is locked onto the upper inner wall of the upper sleeve 24. An upper contact 35 is embedded in the center of the upper locking block 34. A spark gap 36 is fixedly connected to the lower end of the upper contact 35.

[0028] A spring wire 37 is fixedly connected to the lower end of the spark gap 36, and the lower end of the spring wire 37 is fixedly connected to the upper surface of the resistor 33.

[0029] In use, when the line is struck by lightning or experiences overvoltage, the lightning current or overvoltage signal is first transmitted to the spark gap 36 through the upper contact 35. When the voltage reaches the breakdown voltage of the spark gap 36, the spark gap 36 breaks down and becomes conductive. The current is then transmitted through the spring conductor 37 to the multiple resistors 33 below. The resistors 33 utilize their nonlinear resistance characteristics to limit and attenuate the overcurrent, reducing the excessive voltage to a safe range. Finally, the current is conducted to the grounding terminal through the lower contact 32, completing the lightning protection and preventing damage to the line equipment due to overvoltage. During the lightning protection process, if there is an external pressure impact, the pressure-bearing component 2 performs impact buffering as described in Embodiment 1. At this time, the spring conductor 37 can undergo flexible deformation with the slight displacement of the pressure-bearing sleeve 22, which does not affect the normal conduction of current and avoids the rigid connection from being pulled or broken due to structural displacement. This ensures that the lightning protection component 3 maintains stable electrical performance while resisting impact, achieving coordinated operation of impact protection and lightning protection.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A force type line arrester, comprising a ceramic sleeve (1), an internal part of the ceramic sleeve (1) is provided with a pressure bearing assembly (2), an internal part of the pressure bearing assembly (2) is provided with a lightning protection assembly (3); characterized in that The pressure bearing assembly (2) comprises a lower sleeve (21), the lower sleeve (21) is fixedly sleeved on the inner wall of the lower end of the ceramic sleeve (1), an internal part of the lower sleeve (21) movably sleeves a pressure bearing sleeve (22), an external wall of the pressure bearing sleeve (22) movably sleeves a rubber ring (23), an upper end of the lower sleeve (21) is clamped with an upper sleeve (24), an internal wall of the upper sleeve (24) fixedly sleeves a clamping ring (25).

2. A power line arrester of claim 1, characterized in that: An upper end external wall of the pressure bearing sleeve (22) is provided with a ring groove (26), the rubber ring (23) is clamped inside the ring groove (26).

3. A power line arrester of claim 1, wherein: The clamping ring (25) movably sleeves in the ring groove (26), an internal wall of the clamping ring (25) is matched with the ring groove (26).

4. A power line arrester of claim 1, wherein: The lower sleeve (21) and the upper sleeve (24) are located inside the ceramic sleeve (1).

5. A power line arrester of claim 1, wherein: The lightning protection assembly (3) comprises a lower clamping block (31) and an upper clamping block (34), the lower clamping block (31) is clamped on the inner wall of the lower end of the lower sleeve (21), a lower contact (32) is embedded at the center of the lower clamping block (31), a plurality of resistance sheets (33) are fixedly connected on an upper end of the lower contact (32), the upper clamping block (34) is clamped on the inner wall of the upper end of the upper sleeve (24), an upper contact (35) is embedded at the center of the upper clamping block (34), a spark gap (36) is fixedly connected on a lower end of the upper contact (35).

6. A power line arrester of claim 5, characterized in that: A spring lead (37) is fixedly connected on a lower end of the spark gap (36), a lower end of the spring lead (37) is fixedly connected on an upper surface of the resistance sheet (33).

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