Explosion-proof lightning arrester

Abstract

The utility model relates to the related technical field of lightning arresters, and one embodiment of the utility model provides an explosion-proof lightning arrester which comprises a pair of electrodes and a plurality of resistor discs, the resistor discs are arranged between the electrodes, an outer protection assembly is arranged outside the pair of electrodes, and a supporting conduction assembly is arranged between the electrodes and the resistor discs. The connecting assembly is arranged outside the electrodes, the outer protection assembly comprises an inner insulation sleeve, the inner insulation sleeve wraps the pair of electrodes, a first clamping groove is formed in the periphery of the side surface of each electrode, the inner insulation sleeve is inserted into the first clamping groove, and a plurality of reinforcing rods are arranged in the inner insulation sleeve. According to the technical scheme, the technical problems that in the prior art, the lightning arrester does not have the anti-explosion characteristic, electric sparks, high temperature and the like are possibly generated in the lightning energy releasing process of the lightning arrester once lightning stroke occurs, and combustion or explosion of flammable and explosive substances is extremely easily caused are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of surge arresters, and more specifically, to an explosion-proof surge arrester. Background Technology

[0002] In power systems, surge arresters are key devices for ensuring the safe operation of electrical equipment. With the continuous expansion of industrial production, especially in flammable and explosive environments such as petrochemical and coal mines, higher requirements are being placed on the performance of surge arresters.

[0003] Traditional surge arresters mostly only have basic lightning protection functions and do not have explosion-proof characteristics. In these special locations, once a lightning strike occurs, the surge arrester may generate electric sparks, high temperatures, etc. during the process of releasing lightning energy, which can easily cause flammable and explosive materials to burn or explode, seriously threatening the safety of personnel and the integrity of production facilities.

[0004] Furthermore, traditional surge arresters have poor structural connection strength. During long-term outdoor use, they are easily loosened by wind, sun, rain, and natural disasters such as strong winds and earthquakes, leading to poor contact. This can affect the normal operation of the surge arrester, or even cause it to malfunction and fail to effectively perform its lightning protection function, posing a significant safety hazard to the power system.

[0005] Therefore, it is urgent to develop an explosion-proof surge arrester with reliable explosion-proof function to meet the safety requirements of power systems in special environments. Utility Model Content

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide an explosion-proof surge arrester, which solves the technical problem that the prior art does not have explosion-proof characteristics. Once a lightning strike occurs, the surge arrester may generate electric sparks, high temperatures, etc. during the process of releasing lightning energy, which can easily cause the combustion or explosion of flammable and explosive materials.

[0007] According to one aspect, at least one embodiment of this disclosure provides an explosion-proof surge arrester, comprising:

[0008] A pair of electrodes and a plurality of resistive elements, wherein the resistive elements are disposed between the electrodes;

[0009] An external protection assembly is disposed outside the pair of electrodes;

[0010] A support and conduction assembly is disposed between the electrode and the resistive sheet;

[0011] A connection component, wherein the connection component is disposed outside the electrode;

[0012] The outer protective component includes an inner insulating sleeve that wraps around the pair of electrodes. A first slot is formed around the side surface of the electrodes, and the inner insulating sleeve is inserted into the first slot. Several reinforcing rods are provided inside the inner insulating sleeve.

[0013] As a further technical solution, slots are provided at both ends of the reinforcing rod, and several inserts are arranged around the surface of the electrode. The inserts are inserted into the slots, and an outer insulating umbrella sleeve is fitted and connected to the outside of the inner insulating sleeve.

[0014] As a further technical solution, the outer insulating umbrella sleeve is filled with an explosion-proof sleeve frame, a second slot is opened around the electrode side surface, and both ends of the inner surface of the outer insulating umbrella sleeve are provided with protrusions, which are inserted into the second slot.

[0015] As a further technical solution, the support and conduction component includes a positioning groove, which is formed on the lower end face of the electrode. A first conduction block is inserted and connected in the positioning groove, and a second conduction block is movably inserted in the first conduction block. A spring is fitted between the first conduction block and the second conduction block.

[0016] As a further technical solution, the connecting assembly includes a threaded groove formed on the electrode surface, a connecting screw screwed into the threaded groove, a sealing plate provided on the connecting screw, and the sealing plate inserted into the electrode surface.

[0017] As a further technical solution, the explosion-proof sleeve has an overall multi-level circular structure.

[0018] As a further technical solution, an insulating protective pad is provided between the electrode and the resistive sheet.

[0019] As a further technical solution, the first conductive block and the second conductive block are seamlessly fitted together.

[0020] The beneficial effects of the embodiments disclosed herein are as follows:

[0021] 1. In this disclosure, the beneficial effects of the outer protection component are that the inner insulating sleeve isolates the electrode from electrical contact with the outside world, improves insulation performance, strengthens the fit between the rod and the plug and slot, enhances the stability of the connection between the inner insulating sleeve and the electrode, the outer insulating umbrella sleeve increases the creepage distance, the explosion-proof sleeve frame withstands internal pressure, prevents arcing and high-temperature leakage, and the multi-level annular explosion-proof sleeve frame further enhances the explosion-proof strength, ensuring the safety of equipment and personnel.

[0022] 2. In this disclosure, the beneficial effects of the supporting conductive component are that the positioning groove ensures the accurate installation of the first conductive block and guarantees the connection accuracy between the electrode and the first conductive block, the spring makes the first conductive block and the second conductive block in close contact to ensure smooth current conduction, and at the same time the spring buffers external force impact and deformation to maintain conduction stability, and the seamless fitting assembly connection further guarantees the conduction effect.

[0023] 3. The beneficial effects of the connecting components in this disclosure are that the threaded groove and connecting screw achieve a stable connection with the external line, the sealing plate is inserted into the electrode surface to enhance the sealing of the threaded groove, effectively prevent rainwater from entering and causing oxidation, ensure the reliability of the connection, and ensure that the surge arrester works stably in various environments. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0026] Figure 2 This is an isometric sectional view of the present disclosure;

[0027] Figure 3 Appendix to this disclosure Figure 2 Enlarged view of part A in the middle;

[0028] Figure 4 This is an isometric view of the explosion-proof sleeve portion of the present disclosure;

[0029] In the diagram: 1. Electrode; 2. Resistor; 3. Outer protection assembly; 3-1. Inner insulating sleeve; 3-2. First slot; 3-3. Reinforcing rod; 3-4. Slot; 3-5. Insert block; 3-6. Outer insulating umbrella sleeve; 3-7. Explosion-proof sleeve frame; 3-8. Second slot; 3-9. Raised layer; 4. Support and conduction assembly; 4-1. Positioning groove; 4-2. First conduction block; 4-3. Second conduction block; 4-4. Spring; 5. Connecting assembly; 5-1. Threaded groove; 5-2. Connecting screw; 5-3. Sealing plate; 6. Insulating protective pad. Detailed Implementation

[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] like Figures 1-4 As shown, an explosion-proof surge arrester according to an embodiment of the present disclosure is illustrated, comprising:

[0037] A pair of electrodes 1 and several resistors 2, with the resistors 2 disposed between the electrodes 1;

[0038] External protection component 3 is disposed outside the pair of electrodes 1;

[0039] A support and conduction assembly 4 is disposed between the electrode 1 and the resistive sheet 2;

[0040] Connection component 5 is disposed outside electrode 1;

[0041] The outer protective component 3 includes an inner insulating sleeve 3-1, which wraps around a pair of electrodes 1. A first slot 3-2 is formed around the side surface of the electrodes 1, and the inner insulating sleeve 3-1 is inserted into the first slot 3-2. Several reinforcing rods 3-3 are provided inside the inner insulating sleeve 3-1, and slots 3-4 are formed at both ends of the reinforcing rods 3-3. Several inserts 3-5 are formed around the surface of the electrodes 1, and the inserts 3-5 are inserted into the slots 3-4. An outer insulating umbrella sleeve 3-6 is fitted and connected to the outside of the inner insulating sleeve 3-1. An explosion-proof sleeve frame 3-7 is filled inside the outer insulating umbrella sleeve 3-6. A second slot 3-8 is formed around the side surface of the electrodes 1, and protrusions 3-9 are formed at both ends of the inner surface of the outer insulating umbrella sleeve 3-6, and the protrusions 3-9 are inserted into the second slot 3-8.

[0042] In some examples, the connection of the outer protective layer between electrodes 1 is crucial during the use of surge arresters. It must not only ensure electrical insulation performance but also possess a certain degree of explosion-proof capability to ensure the safe and stable operation of the surge arrester. For this purpose, an outer protective component 3 is designed. This component includes an inner insulating sleeve 3-1 that wraps around a pair of electrodes 1, serving as the basic insulating component of the outer protective component 3. A first slot 3-2, formed around the side surface of electrode 1, mates with the inner insulating sleeve 3-1. The inner insulating sleeve 3-1 is inserted into the first slot 3-2, allowing it to fit tightly against the surface of electrode 1, effectively isolating electrode 1 from electrical contact with the outside world and improving insulation performance. Several reinforcing rods 3-3 are provided inside the inner insulating sleeve 3-1, enhancing its structural strength. Slots 3-4 at both ends of the reinforcing rods 3-3 mate with inserts 3-5 arranged around the surface of electrode 1. The inserts 3-5 are inserted into the slots 3-4, further strengthening the connection stability between the inner insulating sleeve 3-1 and electrode 1, ensuring that under various conditions... Under all operating conditions, the inner insulating sleeve 3-1 will not easily detach from electrode 1. The outer insulating umbrella sleeve 3-6, which is fitted around the inner insulating sleeve 3-1, further improves the insulation performance. The skirt structure of the outer insulating umbrella sleeve 3-6 increases the creepage distance and prevents surface discharge in harsh environments such as dampness and dirt. The explosion-proof frame 3-7 filled inside the outer insulating umbrella sleeve 3-6 is a key component for achieving the explosion-proof function. When a fault occurs inside the surge arrester, causing overvoltage, overcurrent, or other conditions that lead to a sharp increase in internal pressure, the explosion-proof frame will... The burst sleeve frame 3-7 can withstand a certain pressure to prevent the outer insulating umbrella sleeve 3-6 from breaking, thereby avoiding the leakage of dangerous substances such as internal electric arcs and high temperatures to the outside, ensuring the safety of equipment and personnel. The second slot 3-8 opened around the side surface of electrode 1 cooperates with the protrusions 3-9 set at both ends of the inner surface of the outer insulating umbrella sleeve 3-6. The protrusions 3-9 are inserted into the second slot 3-8, so that the outer insulating umbrella sleeve 3-6 can be firmly fitted on the outside of the inner insulating sleeve 3-1, ensuring the installation stability of the outer insulating umbrella sleeve 3-6.

[0043] like Figures 1-4 As shown, this embodiment proposes a support and conduction component 4 including a positioning groove 4-1, which is opened on the lower end face of the electrode 1. A first conduction block 4-2 is inserted and connected in the positioning groove 4-1, and a second conduction block 4-3 is movably inserted in the first conduction block 4-2. A spring 4-4 ​​is fitted between the first conduction block 4-2 and the second conduction block 4-3.

[0044] In some examples, good conduction between electrode 1 and resistor 2 is crucial for the proper functioning of the surge arrester. Therefore, a supporting conduction assembly 4 is designed. This assembly includes a positioning groove 4-1 on the lower end face of electrode 1, providing a precise installation position for the first conducting block 4-2. The design of the positioning groove 4-1 ensures that the first conducting block 4-2 can be accurately inserted into the lower end of electrode 1, guaranteeing the connection accuracy and stability between electrode 1 and the first conducting block 4-2, laying a good foundation for subsequent current conduction. A second conducting block 4-3 is movably inserted into the first conducting block 4-2, and a spring 4-4 ​​is fitted between them. The elastic force ensures that the first conducting block 4-2 and the second conducting block 4-3 always maintain close contact, ensuring that the current can be smoothly conducted from the electrode 1 to the first conducting block 4-2, and then through the second conducting block 4-3 to the resistor 2. This effectively avoids the problem of poor conduction caused by poor contact. The presence of the spring 4-4 ​​also plays a role in buffering and compensation. During the operation of the surge arrester, it may be affected by various external forces, such as vibration, thermal expansion and contraction. The spring 4-4 ​​can absorb the impact and deformation caused by these external forces, ensuring that the connection between the first conducting block 4-2 and the second conducting block 4-3 will not be damaged by these factors, thereby maintaining the stability of conduction.

[0045] like Figures 1-4 As shown, this embodiment proposes a connecting component 5 including a threaded groove 5-1, which is formed on the surface of the electrode 1. A connecting screw 5-2 is screwed into the threaded groove 5-1, and a sealing plate 5-3 is provided on the connecting screw 5-2. The sealing plate 5-3 is inserted into the surface of the electrode 1.

[0046] In some examples, during the installation of the surge arrester, a connection component 5 is designed to achieve effective connection and conduction. This component includes a threaded groove 5-1 opened on the electrode 1, and a connection screw 5-2 connected by threaded engagement for connection with the line. A sealing plate 5-3 on the connection screw 5-2 can increase the sealing of the threaded groove 5-1 to prevent rainwater from entering and causing oxidation.

[0047] For example, such as Figure 4 As shown, the explosion-proof sleeve 3-7 has a multi-level circular structure.

[0048] In some examples, the explosion-proof strength of the overall structure is increased through a multi-level annular structure.

[0049] For example, such as Figure 2 As shown, an insulating protective pad 6 is supported between electrode 1 and resistor 2.

[0050] In some examples, the protection of the spring 4-4 ​​section is increased by adding an insulating protective pad 6.

[0051] For example, such as Figure 2 As shown, the first conductive block 4-2 and the second conductive block 4-3 are seamlessly fitted together.

[0052] In some examples, the seamless fit between the first conductive block 4-2 and the second conductive block 4-3 ensures the stability of the conduction.

[0053] In actual use: First, place the resistor 2 between the electrodes 1 and separate them with the insulating protective pad 6. Insert the first conductive block 4-2 into the positioning groove 4-1 on the lower end face of the electrode 1. Then, insert the second conductive block 4-3 into the first conductive block 4-2 and put on the spring 4-4. Insert the inner insulating sleeve 3-1 into the first slot 3-2 of the electrode 1. Insert the insert 3-5 into the slot 3-4 of the reinforcing rod 3-3. Fill the outer insulating umbrella sleeve 3-6 with the explosion-proof sleeve frame 3-7 and put it on the outside of the inner insulating sleeve 3-1. Insert the protrusion 3-9 into the second slot 3-8 of the electrode 1. Connect the external circuit by screwing the connecting screw 5-2 into the threaded groove 5-1 on the surface of the electrode 1. Insert the sealing plate 5-3 into the surface of the electrode 1 to enhance the sealing.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. An explosion-proof surge arrester, characterized in that, include: A pair of electrodes (1) and a plurality of resistors (2), wherein the resistors (2) are disposed between the electrodes (1); An external protection component (3) is disposed outside the pair of electrodes (1); A support and conduction assembly (4) is provided between the electrode (1) and the resistive sheet (2); A connecting component (5) is disposed outside the electrode (1); The outer protective component (3) includes an inner insulating sleeve (3-1), which wraps around the outside of a pair of electrodes (1). A first slot (3-2) is provided around the side surface of the electrode (1), and the inner insulating sleeve (3-1) is inserted into the first slot (3-2). A plurality of reinforcing rods (3-3) are provided inside the inner insulating sleeve (3-1).

2. The explosion-proof surge arrester according to claim 1, characterized in that, The reinforcing rod (3-3) has slots (3-4) at both ends. The electrode (1) has several inserts (3-5) arranged around its surface. The inserts (3-5) are inserted into the slots (3-4). The inner insulating sleeve (3-1) is fitted with an outer insulating umbrella sleeve (3-6).

3. The explosion-proof surge arrester according to claim 2, characterized in that, The outer insulating umbrella sleeve (3-6) is filled with an explosion-proof sleeve frame (3-7). A second slot (3-8) is provided around the side surface of the electrode (1). Both ends of the inner surface of the outer insulating umbrella sleeve (3-6) are provided with a protrusion (3-9), which is inserted into the second slot (3-8).

4. The explosion-proof surge arrester according to claim 1, characterized in that, The support and conduction assembly (4) includes a positioning groove (4-1), which is formed on the lower end face of the electrode (1). A first conduction block (4-2) is inserted into the positioning groove (4-1), and a second conduction block (4-3) is movably inserted into the first conduction block (4-2). A spring (4-4) is fitted between the first conduction block (4-2) and the second conduction block (4-3).

5. The explosion-proof surge arrester according to claim 1, characterized in that, The connecting assembly (5) includes a threaded groove (5-1) formed on the surface of the electrode (1). A connecting screw (5-2) is screwed into the threaded groove (5-1). A sealing plate (5-3) is provided on the connecting screw (5-2) and inserted into the surface of the electrode (1).

6. The explosion-proof surge arrester according to claim 3, characterized in that, The explosion-proof sleeve (3-7) has a multi-level circular structure.

7. The explosion-proof surge arrester according to claim 1, characterized in that, An insulating protective pad (6) is provided between the electrode (1) and the resistor (2).

8. The explosion-proof surge arrester according to claim 4, characterized in that, The first conductive block (4-2) and the second conductive block (4-3) are seamlessly fitted together.

Images