Composite housed lightning arrester double-layer explosion-proof device and forming method thereof

Abstract

The invention discloses a composite housed lightning arrester double-layer explosion-proof device and a forming method thereof, and relates to the technical field of lightning arresters. Comprising an insulating cylinder, a resistor disc group installed in a stacked mode is fixed in the insulating cylinder, electrode plates are fixed to the upper end and the lower end of the resistor disc group, and binding posts are connected to the outer sides of the electrode plates; the electrode further comprises sealing covers, the sealing covers are arranged at the upper end and the lower end of the insulating cylinder in a sleeving mode, the binding posts penetrate through the middles of the sealing covers, and rubber pads are fixed between the interiors of the sealing covers and the electrode slices. And the locking mechanism is arranged between the inner wall of the sealing cover and the insulating cylinder, and the locking mechanism is used for fixedly installing the sealing cover. According to the double-layer explosion-proof device of the composite housed lightning arrester and the forming method thereof, explosion-proof buffers are arranged in the transverse direction and the vertical direction, the explosion-proof effect is improved, and overall forming and installation are simple.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, in particular to a double-layer explosion-proof device of a composite jacket lightning arrester and a forming method thereof. Background Art

[0002] Composite jacket arrester is a type of lightning arrester. It is currently the most advanced protective electrical appliance for limiting overvoltage. It is widely used in power generation, transmission, transformation, and distribution systems. It can protect the insulation of electrical equipment from overvoltage damage. It not only has the advantages of porcelain jacket metal oxide lightning arrester, but also has the advantages of good electrical insulation performance, high dielectric strength, anti-leakage, anti-electrical corrosion, heat resistance, cold resistance, aging resistance, explosion protection, hydrophobicity, and sealing. In order to improve its explosion-proof characteristics, a double-layer explosion-proof device is usually set. However, the existing double-layer explosion-proof device has the following problems when used: The internal resistor sheet bursts abnormally, causing an instantaneous explosion and generating huge impact forces in the horizontal and vertical directions. The existing double-layer explosion-proof device of the lightning arrester is not convenient for providing two-way explosion-proof protection in the vertical and horizontal directions. The upper and lower ends are tightly fixed by flanges, which is not convenient for providing effective explosion-proof buffering, resulting in most of the explosion impact acting in the horizontal area, which is easy to cause serious damage to the entire system. At the same time, there is also the problem of a more complicated assembly process during molding and assembly, especially the installation of the upper and lower ends, most of which need to be fixed by bolts in all directions, which is more cumbersome to operate and increases the cost of use.

[0003] In response to the above problems, it is urgent to carry out innovative design based on the original foundation. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-layer explosion-proof device of a composite jacket lightning arrester and a molding method thereof to solve the problems raised by the above-mentioned background technology. The technical solution of the present invention provides a solution that is significantly different from the existing technology in order to solve the technical problem that the existing technology solution is too single.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a composite jacket arrester double-layer explosion-proof device and a molding method thereof, comprising an insulating cylinder, wherein a stacked resistor group is fixed in the insulating cylinder, and electrode sheets are fixed at both the upper and lower ends of the resistor group, and the outer sides of the electrode sheets are connected to terminal posts; It also includes a sealing cover, which is sleeved on the upper and lower ends of the insulating cylinder, the terminal passes through the middle of the sealing cover, and a rubber pad is fixed between the inside of the sealing cover and the electrode sheet; A locking mechanism, which is provided between the inner wall of the sealing cover and the insulating cylinder and is used to securely install the sealing cover; The insulating outer umbrella sleeve is arranged on the outside of the insulating cylinder. The insulating cylinder is provided with a pressure relief hole. A pressure relief component is arranged in the pressure relief hole for lateral pressure relief of internal explosion.

[0006] Preferably, the resistor plate group is composed of a plurality of zinc oxide valve plates.

[0007] Preferably, the locking mechanism includes an inner groove, which is opened on the inner side wall of the sealing cover, and a locking rod is connected to the inner groove through a first spring, and the inner end of the locking rod is located in the locking groove, and the locking groove is opened at the edge end of the insulating tube and the insulating outer umbrella sleeve, and an unlocking rod is provided through the locking groove, and the unlocking rod is located outside the electrode sheet.

[0008] Preferably, the locking rods are distributed at equal angles inside the sealing cover. Preferably, the unlocking rods are designed as an "L"-shaped structure inside the locking rods. The unlocking rods are in contact with the outer end side of the electrode sheet, and the outer end side of the electrode sheet is designed as a slope structure.

[0009] Preferably, the pressure relief assembly includes an outer pressure relief sleeve and an inner pressure relief sleeve, the outer pressure relief sleeve and the inner pressure relief sleeve are arranged in the pressure relief hole, a second spring is fixed between the outer pressure relief sleeve and the inner pressure relief sleeve, an outer magnetic sheet is fixed to the inner wall of the cavity of the outer pressure relief sleeve, and an inner magnetic sheet is fixed to the outer end of the inner pressure relief sleeve.

[0010] Preferably, the outer pressure relief sleeve and the inner pressure relief sleeve are nested, the cross-sections of the outer pressure relief sleeve and the inner pressure relief sleeve are both designed to be "T"-shaped structures, and the pressure relief holes are spirally distributed on the insulating cylinder.

[0011] Preferably, the outer magnetic sheet and the inner magnetic sheet are positioned opposite to each other, and the outer magnetic sheet and the inner magnetic sheet magnetically repel each other.

[0012] Preferably, the method comprises the following steps: S1: Punch pressure relief holes on the outside of the prepared insulation tube, and then insert the pressure relief components into the multiple pressure relief holes in sequence; S2: Place the resistor group into the insulating tube, fix the electrode sheets at the upper and lower ends of the resistor group, and connect the terminal to the electrode sheets; S3: High-temperature vulcanized silicone rubber is molded and bonded to the outer wall of the insulating cylinder to form an insulating outer umbrella sleeve on the outer wall, and then the sealing cover is buckled on the upper and lower ends of the insulating cylinder and the insulating outer umbrella sleeve. The inclined surface of the locking rod contacts the insulating cylinder and the insulating outer umbrella sleeve and is forced to shrink. Under the action of the first spring, it is finally stuck in the locking groove to complete the molding and installation.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention is provided with a locking mechanism. When installing the sealing cover, it is only necessary to put the sealing cover on both ends of the insulating cylinder. The inclined surface of the locking rod contacts the insulating cylinder and is forced to retract into the inner groove. Under the action of the first spring, it is finally locked in the locking groove. The installation of the complete sealing cover is very simple and the molding process is also very convenient. On this basis, a pressure relief hole is opened on the outside of the insulating cylinder and the pressure relief assembly is inserted. The operation process does not require complicated operations. The pressure relief assembly consists of two mutually sleeved outer pressure relief sleeves and an inner pressure relief sleeve. The accessories are simple and the entire processing process is relatively convenient. While effectively protecting, the cost is greatly reduced. According to the present invention, when an explosion impact occurs in the resistor plate group, the electrode plate is forced to move toward the upper and lower ends, and the unlocking rod is resisted by the inclined surface. The locking rod is pushed into the inner groove by the unlocking rod, so that the sealing cover and the insulating tube are quickly separated. In conjunction with the initial buffering of the rubber pad, the sealing cover is forced to separate from the insulating tube, avoiding explosion splashing and performing vertical buffering. Furthermore, the inner pressure relief sleeve is forced to move toward the outer pressure relief sleeve, and is buffered by the second spring and the magnetically repulsive outer and inner magnetic sheets, and is laterally buffered in the circumferential spiral area. In conjunction with vertical buffering, double explosion-proof protection is performed, and basic protection is performed in conjunction with the insulating outer umbrella sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the internal installation structure of the sealing cover of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 This is a schematic diagram of the top view distribution structure of the locking rod of the present invention.

[0015] In the figure: 1. Insulating cylinder; 2. Resistor group; 3. Electrode; 4. Terminal; 5. Sealing cover; 51. Rubber pad; 61. Inner groove; 62. First spring; 63. Locking rod; 64. Locking groove; 65. Unlocking rod; 7. Insulating outer umbrella cover; 81. Outer pressure relief sleeve; 82. Inner pressure relief sleeve; 83. Second spring; 84. Outer magnetic sheet; 85. Inner magnetic sheet. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-Figure 5 The present invention provides a technical solution: a double-layer explosion-proof device of a composite jacket lightning arrester, comprising an insulating cylinder 1, in which a stacked resistor group 2 is fixed, with electrode sheets 3 fixed at the upper and lower ends of the resistor group 2, and the outer sides of the electrode sheets 3 are connected to terminal posts 4; a sealing cover 5 is sleeved on the upper and lower ends of the insulating cylinder 1, with the terminal posts 4 passing through the middle of the sealing cover 5, and a rubber pad 51 is fixed between the inside of the sealing cover 5 and the electrode sheets 3; the resistor group 2 is composed of a plurality of zinc oxide valve sheets; As an embodiment of the present invention, a locking mechanism is provided between the inner wall of the sealing cover 5 and the insulating cylinder 1 , and the locking mechanism is used to securely install the sealing cover 5 .

[0018] As an embodiment of the present invention, the insulating outer umbrella sleeve 7 is sleeved on the outside of the insulating cylinder 1, and a pressure relief hole is opened on the insulating cylinder 1. A pressure relief component is provided in the pressure relief hole for lateral pressure relief of internal explosion; The locking mechanism includes an inner groove 61, which is provided on the inner side wall of the sealing cover 5. A locking rod 63 is connected to the inner groove 61 via a first spring 62. The inner end of the locking rod 63 is located in the locking groove 64. The locking groove 64 is provided at the edge of the insulating tube 1 and the insulating outer umbrella cover 7. An unlocking rod 65 is provided through the locking groove 64. The unlocking rod 65 is located outside the electrode sheet 3. The locking rods 63 are distributed at equal angles in the sealing cover 5. The unlocking rod 65 in the locking rod 63 is designed as an "L"-shaped structure. The unlocking rod 65 contacts the outer end side of the electrode sheet 3, and the outer end side of the electrode sheet 3 is designed as a slope structure. When the resistor group 2 explodes, the electrode sheet 3 is forced to move toward the upper and lower ends, and the inclined surface contacts the unlocking rod 65, and the unlocking rod 65 pushes the locking rod 63 into the inner groove 61, so that the locking rod 63 disengages from the locking groove 64, thereby quickly separating the sealing cover 5 from the insulating tube 1. Under the vertical impact force, the sealing cover 5 is forced to separate from the insulating tube 1 with the help of the rubber pad 51 to avoid being exploded into fragments and impacting the surrounding area.

[0019] As an embodiment of the present invention, the pressure relief assembly includes an outer pressure relief sleeve 81 and an inner pressure relief sleeve 82, the outer pressure relief sleeve 81 and the inner pressure relief sleeve 82 are arranged in the pressure relief hole, a second spring 83 is fixed between the outer pressure relief sleeve 81 and the inner pressure relief sleeve 82, an outer magnetic sheet 84 is fixed to the inner wall of the cavity of the outer pressure relief sleeve 81, and an inner magnetic sheet 85 is fixed to the outer end of the inner pressure relief sleeve 82; the outer pressure relief sleeve 81 and the inner pressure relief sleeve 82 are nested, and the cross-sections of the outer pressure relief sleeve 81 and the inner pressure relief sleeve 82 are both designed to be "T"-shaped structures, and the pressure relief holes are spirally distributed on the insulating tube 1; the outer magnetic sheet 84 and the inner magnetic sheet 85 are relative to each other, and the outer magnetic sheet 84 and the inner magnetic sheet 85 repel each other magnetically; The inner pressure relief sleeve 82 is forced to move toward the outer pressure relief sleeve 81, and part of the impact force is absorbed by the second spring 83, and is further buffered by the magnetically repelling outer magnetic sheet 84 and inner magnetic sheet 85. The spirally distributed inner pressure relief sleeve 82 and outer pressure relief sleeve 81 disperse and buffer the lateral impact force in the circumferential direction, and cooperate with the buffering capacity of the insulating outer umbrella sleeve 7 itself to greatly reduce the losses caused by the explosion.

[0020] As an embodiment of the present invention, the method comprises the following steps: S1: Punch pressure relief holes on the outside of the prepared insulation tube 1, and then insert the pressure relief components into the multiple pressure relief holes in sequence; S2: Place the resistor group 2 into the insulating tube 1, fix the electrode sheets 3 at the upper and lower ends of the resistor group 2, and connect the terminal 4 to the electrode sheets 3; S3: High-temperature vulcanized silicone rubber is molded and bonded to the outer wall of the insulating tube 1 to form an insulating outer umbrella sleeve 7 on its outer wall. Then, the sealing cover 5 is buckled on the upper and lower ends of the insulating tube 1 and the insulating outer umbrella sleeve 7. The inclined surface of the locking rod 63 contacts the insulating tube 1 and the insulating outer umbrella sleeve 7 and is forced to shrink. Under the action of the first spring 62, it is finally stuck in the locking groove 64 to complete the molding and installation.

[0021] Working principle: When the resistor group 2 explodes, the electrode plate 3 is forced to move toward the upper and lower ends, and the unlocking rod 65 is resisted by the inclined surface. The locking rod 63 is pushed into the inner groove 61 by the unlocking rod 65, so that the locking rod 63 is disengaged from the locking groove 64, and then the sealing cover 5 is quickly separated from the insulating tube 1. Under the vertical impact force, the sealing cover 5 is forced to separate from the insulating tube 1 with the help of the rubber pad 51 to avoid being blown into fragments and impacting the surroundings. At the same time, the inner pressure relief sleeve 82 is forced to move toward the outer pressure relief sleeve 81, and part of the impact force is absorbed by the second spring 83, and it is buffered again by the magnetically repelling outer magnetic sheet 84 and inner magnetic sheet 85. The spirally distributed inner pressure relief sleeve 82 and outer pressure relief sleeve 81 disperse and buffer the lateral impact force in the circumferential direction, and cooperate with the buffering capacity of the insulating outer umbrella sleeve 7 itself to greatly reduce the loss caused by the explosion.

[0022] Any content not described in detail in this specification is prior art known to those skilled in the art. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation and are therefore not to be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified or limited, the terms "connected" and "connected" are to be understood broadly, meaning, for example, fixedly connected, detachably connected, or integrally connected; mechanically connected, electrically connected; directly connected, or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention on a case-by-case basis.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-layer explosion-proof device of a composite jacket lightning arrester, comprising an insulating cylinder (1), wherein a stacked resistor group (2) is fixed in the insulating cylinder (1), electrode sheets (3) are fixed at both upper and lower ends of the resistor group (2), and the outer sides of the electrode sheets (3) are connected to terminal posts (4); Its characteristics are: It also includes a sealing cover (5), the sealing cover (5) is sleeved on the upper and lower ends of the insulating cylinder (1), the terminal (4) passes through the middle of the sealing cover (5), and a rubber pad (51) is fixed between the inside of the sealing cover (5) and the electrode sheet (3); A locking mechanism, the locking mechanism being arranged between the inner wall of the sealing cover (5) and the insulating cylinder (1), the locking mechanism being used to securely install the sealing cover (5); An insulating outer umbrella sleeve (7) is sleeved on the outside of the insulating cylinder (1); a pressure relief hole is provided on the insulating cylinder (1); a pressure relief component is provided in the pressure relief hole for lateral pressure relief of internal explosion.

2. A double-layer explosion-proof device for a composite jacket arrester according to claim 1, characterized in that: The resistor plate group (2) is composed of a plurality of zinc oxide valve plates.

3. The double-layer explosion-proof device of a composite jacket arrester according to claim 1, characterized in that: The locking mechanism comprises an inner groove (61), the inner groove (61) being provided on the inner side wall of the sealing cover (5), a locking rod (63) being connected to the inner groove (61) via a first spring (62), the inner end of the locking rod (63) being located in a locking groove (64), the locking groove (64) being provided at the edge of the insulating tube (1) and the insulating outer umbrella sleeve (7), an unlocking rod (65) being provided through the locking groove (64), and the unlocking rod (65) being located outside the electrode sheet (3).

4. A double-layer explosion-proof device for a composite jacket arrester according to claim 3, characterized in that: The locking rods (63) are distributed at equal angles inside the sealing cover (5), the inner ends of the locking rods (63) are designed as a right-angled trapezoidal structure, and the inner ends of the locking rods (63) are inclined downward.

5. The double-layer explosion-proof device of a composite jacket arrester according to claim 4 is characterized in that: The unlocking lever (65) is designed as an "L"-shaped structure, the unlocking lever (65) contacts the outer end side of the electrode sheet (3), and the outer end side of the electrode sheet (3) is designed as an inclined surface structure.

6. The double-layer explosion-proof device of a composite jacket arrester according to claim 1, characterized in that: The pressure relief assembly comprises an outer pressure relief sleeve (81) and an inner pressure relief sleeve (82), wherein the outer pressure relief sleeve (81) and the inner pressure relief sleeve (82) are arranged in the pressure relief hole, a second spring (83) is fixed between the outer pressure relief sleeve (81) and the inner pressure relief sleeve (82), an outer magnetic sheet (84) is fixed to the inner wall of the cavity of the outer pressure relief sleeve (81), and an inner magnetic sheet (85) is fixed to the outer end of the inner pressure relief sleeve (82).

7. The double-layer explosion-proof device of a composite jacket arrester according to claim 6, characterized in that: The outer pressure relief sleeve (81) and the inner pressure relief sleeve (82) are nested, and the cross-sections of the outer pressure relief sleeve (81) and the inner pressure relief sleeve (82) are both designed to be "T"-shaped structures, and the pressure relief holes are spirally distributed on the insulating cylinder (1).

8. The double-layer explosion-proof device of a composite jacket arrester according to claim 7, characterized in that: The outer magnetic sheet (84) and the inner magnetic sheet (85) are positioned relative to each other, and the outer magnetic sheet (84) and the inner magnetic sheet (85) magnetically repel each other.

9. A method for forming a composite jacket arrester double-layer explosion-proof device, applicable to the composite jacket arrester double-layer explosion-proof device according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1: punching pressure relief holes on the outside of the prepared insulating tube (1), and then inserting the pressure relief components into the multiple pressure relief holes in sequence; S2: Place the resistor group (2) into the insulating tube (1), fix the electrode sheets (3) at the upper and lower ends of the resistor group (2), and connect the terminal (4) to the electrode sheets (3); S3: High-temperature vulcanized silicone rubber is molded and bonded to the outer wall of the insulating tube (1) to form an insulating outer umbrella sleeve (7) on the outer wall. Then, the sealing cover (5) is buckled on the upper and lower ends of the insulating tube (1) and the insulating outer umbrella sleeve (7). The inclined surface of the locking rod (63) contacts the insulating tube (1) and the insulating outer umbrella sleeve (7) and contracts under force. Finally, under the action of the first spring (62), it is clamped into the locking groove (64) to complete the molding and installation.

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