Arrester with coiled structure

Abstract

The utility model discloses a lightning arrester with a coiled structure, and relates to the technical field of lightning arresters, in particular to the lightning arrester with the coiled structure, which comprises an insulating positioning sleeve, the insulating positioning sleeve comprises a middle ring, an upper sleeve and a lower sleeve, slotted holes are formed in the peripheries of the upper sleeve and the lower sleeve, chamfers are arranged on the inner sides of the end parts of the upper sleeve and the lower sleeve, and the middle ring is sleeved with the slotted holes. Resistor disc sets are inserted into the upper sleeve and the lower sleeve, and spacing pieces are arranged in the middle ring. Through the arrangement of the insulating positioning sleeve, the lightning arrester with the coiled structure has the effect of conveniently assembling the lightning protection core body, and through the arrangement of the insulating positioning sleeve, the lightning arrester with the coiled structure has the effect of firmly assembling the lightning protection core body.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a lightning arrester with a coiled structure. Background Art

[0002] The coiled structure lightning arrester is a lightning arrester with a special structural design. There is usually one or more groups of resistors inside the core. These resistors are the core components of the lightning arrester. They are generally made of materials such as metal oxides (such as zinc oxide) and have nonlinear volt-ampere characteristics. Under normal operating voltage, the resistors are in a high resistance state and only microampere-level current passes through. When overvoltage occurs, the resistance of the resistors drops sharply and the current is quickly discharged, thereby limiting the residual pressure at both ends of the lightning arrester and protecting electrical equipment from overvoltage damage. There are usually gaskets or gaps between the resistor groups, and there will be one or more layers of special winding structure on the outside of the resistor group. This winding can be made of glass fiber tape, metal wire or other insulating materials wound according to a certain pattern. The winding method may be spiral, mesh or other specific shapes. Its purpose is to provide additional mechanical support and protection for the resistor group, while also helping to dissipate heat and improve the overall performance of the lightning arrester.

[0003] In the prior art, the resistor sheets are usually fixed by insulating supports, or by binding tape, or by insulating glue before the core is wound. However, the above fixing methods are difficult to achieve both convenient and firm fixation. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a coiled structure arrester, which solves the problems raised in the above background technology.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a coiled structure lightning arrester, including an insulating positioning sleeve, the insulating positioning sleeve including a middle ring, an upper sleeve and a lower sleeve, the upper sleeve and the lower sleeve are both provided with slots around their peripheries, the inner sides of the ends of the upper sleeve and the lower sleeve are provided with chamfers, the interiors of the upper sleeve and the lower sleeve are both plugged with resistor sheet groups, and the interior of the middle ring is provided with spacers.

[0008] Preferably, the insulating positioning sleeve is made of a fire-resistant plastic with good toughness, so that the insulating positioning sleeve is not damaged when deformed by force and is resistant to high temperatures.

[0009] Preferably, the inner diameters of the upper and lower sleeves are the same and the outer diameter of the resistor group is the same, and the chamfer extends from the end to the outer end of the slot, so that the resistor group can be easily inserted into the sleeve. Squeezing the sleeve toward the middle can cause it to expand outward to increase its inner diameter, thereby facilitating the insertion of the resistor group into the sleeve.

[0010] Preferably, the thickness of the spacer is slightly larger than that of the middle ring, and the spacer and the middle ring are matched with each other in a clearance. While ensuring the structural strength of the insulating positioning sleeve, the inner diameter of the middle ring is as large as possible, so that the outer diameter of the spacer is as large as possible.

[0011] Preferably, the slots are evenly distributed around the upper and lower sleeves, and the slots are set at a distance from the outer surface of the middle ring, so that the parts of the upper and lower sleeves close to the middle ring are a complete circular ring, which can hug the outer surface of the resistor group to temporarily fix it.

[0012] Preferably, after both ends of the resistor chip group are inserted into the interior of the insulating positioning sleeve, the upper sleeve and the lower sleeve of the two insulating positioning sleeves almost wrap the entire outer surface of the resistor chip group and are bonded using glue.

[0013] The utility model provides a coiled structure arrester, which has the following beneficial effects:

[0014] 1. The coiled structure lightning arrester has the effect of facilitating the assembly of the lightning protection core by setting the insulating positioning sleeve. Since the inner diameter of the casing becomes larger after being extruded, the resistor group can be easily inserted into the casing even if the casing is long. Since the middle ring can fix the spacer in the middle position, the resistor group and the spacer can be easily concentric, and the two resistor groups can be easily connected and fixed by connecting the insulating positioning sleeve.

[0015] 2. The coiled structure lightning arrester, through the setting of the insulating positioning sleeve, has the effect of firmly assembling the lightning protection core. Since the insulating positioning sleeve is relatively long, it can almost completely wrap the resistor group. At the same time, the sleeve wrapped around the outer surface of the resistor group is connected by glue, so the resistor group can be firmly fixed inside the insulating positioning sleeve, thereby achieving the effect of firmly assembling the lightning protection core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of a cross-sectional view of the present utility model;

[0017] Figure 2 This is a schematic structural diagram of an exploded view of the present invention;

[0018] Figure 3 This is a structural diagram of the appearance view of the utility model;

[0019] Figure 4 This is a structural diagram of the insulating positioning sleeve of the utility model.

[0020] In the figure: 1. Insulating positioning sleeve; 101. Middle ring; 102. Upper sleeve; 103. Lower sleeve; 104. Slot; 105. Chamfer; 2. Resistor group; 3. Spacer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figures 1 to 4 The utility model provides a technical solution: a coiled structure lightning arrester, including an insulating positioning sleeve 1, the material of the insulating positioning sleeve 1 is a fire-resistant plastic with good toughness, so that the insulating positioning sleeve 1 is not damaged by stress deformation and is resistant to high temperature, the insulating positioning sleeve 1 includes a middle ring 101, an upper sleeve 102 and a lower sleeve 103, the periphery of the upper sleeve 102 and the lower sleeve 103 are provided with slots 104, the inner sides of the ends of the upper sleeve 102 and the lower sleeve 103 are provided with chamfers 105, the interiors of the upper sleeve 102 and the lower sleeve 103 are both plugged with resistor sheet groups 2, the inner diameters of the upper sleeve 102 and the lower sleeve 103 are the same and the outer diameters of the resistor sheet group 2 are the same, the chamfers 105 extend from the end to the outer end of the slot 104, so that the resistor sheet group 2 can be easily inserted into the sleeve, and squeezing the sleeve toward the middle can cause it to expand outward to increase its inner diameter, thereby facilitating the resistance sheet group 2 is inserted into the sleeve, and the slots 104 are evenly distributed around the upper sleeve 102 and the lower sleeve 103. The slots 104 are set at a distance from the outer surface of the middle ring 101, so that the parts of the upper sleeve 102 and the lower sleeve 103 close to the middle ring 101 are a complete circular ring, which can hug the outer surface of the resistor group 2 to temporarily fix it. After both ends of the resistor group 2 are inserted into the interior of the insulating positioning sleeve 1, the upper sleeve 102 and the lower sleeve 103 of the two insulating positioning sleeves 1 almost wrap the entire outer surface of the resistor group 2 and are glued together. A spacer 3 is set inside the middle ring 101. The thickness of the spacer 3 is slightly larger than the thickness of the middle ring 101. The spacer 3 is clearance-matched with the middle ring 101. Under the condition of ensuring the structural strength of the insulating positioning sleeve 1, the inner diameter of the middle ring 101 is as large as possible, so that the outer diameter of the spacer 3 is as large as possible.

[0023] When in use, first make the corresponding insulating positioning sleeve 1 according to the structural dimensions of the resistor group 2 and the spacer 3, and require that the sum of the length dimensions of the upper sleeve 102 and the lower sleeve 103 is almost equal to the length of the resistor group 2, so that the outer surface of the resistor group 2 is almost completely wrapped when inserted between the two insulating positioning sleeves 1, and require that the thickness dimension of the middle ring 101 is slightly smaller than the thickness dimension of the spacer 3, so that when the two resistor groups 2 are inserted into the inside of an insulating positioning sleeve 1, both surfaces of the spacer 3 can contact the end face of the resistor group 2. When assembling, first place the end face of the resistor group 2 on the table with the end face facing down, and then pick up an insulating positioning sleeve 1 and insert it into the resistor group 2 from the upper end of the resistor group 2. During this process, since the end of the sleeve is provided with a chamfer 105, the chamfer 105 part can be easily fitted on the outer surface of the resistor group 2, and further push the insulating positioning sleeve 1 downward. Since the inner diameter dimension of the sleeve is the same as the outer diameter dimension of the resistor group 2, friction will be generated. Under the relative extrusion of the friction and thrust, the sleeve can be The position of the slot 104 is deformed and expanded outward to reduce friction. This sleeve structure can avoid the problem of the sleeve being too long to fit into the resistor group 2, and ensures that no matter how long the sleeve is, it can be easily put on the outer surface of the resistor group 2. After one end of the insulating positioning sleeve 1 is inserted into the resistor group 2, the spacer 3 is placed in the middle of the middle ring 101 from the other end of the insulating positioning sleeve 1, and then another resistor group 2 is also inserted into the sleeve at the other end of the insulating positioning sleeve 1. The expandable structure of the sleeve makes it very simple to connect the insulating positioning sleeve 1 and the resistor group 2. Even if the sleeve size is relatively long, it can be easily connected. Repeat the above steps to splice each resistor group 2 and the spacer 3 through the insulating positioning sleeve 1. The spliced ​​resistor group 2 is squeezed from both ends to the middle by an extrusion device. After extrusion, the expanded sleeve is smoothed and then glue is dripped from the slot 104 between the sleeve and the resistor group 2. At this time, the resistor group 2 is wrapped by the insulating positioning sleeve 1 and bonded with glue, so that the connection of the resistor group 2 is firm and not easy to fall apart.

[0024] To sum up, since the inner diameter of the coiled structure lightning arrester will become larger after the sleeve is squeezed, the resistor group 2 can be easily inserted into the sleeve even if the sleeve is longer. Since the middle ring 101 can fix the spacer 3 in the middle position, the resistor group 2 and the spacer 3 can be easily made concentric, and then the two resistor groups 2 can be easily connected and fixed through the connection of the insulating positioning sleeve 1. Since the insulating positioning sleeve 1 is relatively long, it can almost completely wrap the resistor group 2. At the same time, the sleeve wrapped around the outer surface of the resistor group 2 is connected by glue, so the resistor group 2 can be firmly fixed inside the insulating positioning sleeve 1, thereby achieving the effect of making the lightning protection core body firmly assembled.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A coiled structure lightning arrester, comprising an insulating positioning sleeve (1), characterized in that: The insulating positioning sleeve (1) comprises a middle ring (101), an upper sleeve (102) and a lower sleeve (103); slots (104) are provided around the periphery of the upper sleeve (102) and the lower sleeve (103); chamfers (105) are provided on the inner sides of the ends of the upper sleeve (102) and the lower sleeve (103); resistor sheet groups (2) are inserted into the interior of the upper sleeve (102) and the lower sleeve (103); and a spacer (3) is provided inside the middle ring (101).

2. The coiled structure arrester according to claim 1, characterized in that: The insulating positioning sleeve (1) is made of fire-resistant plastic with good toughness, so that the insulating positioning sleeve (1) is not damaged when deformed by force and is resistant to high temperatures.

3. The coiled structure arrester according to claim 1, characterized in that: The inner diameters of the upper sleeve (102) and the lower sleeve (103) are the same and are the same as the outer diameter of the resistor group (2). The chamfer (105) extends from the end to the outer end of the slot (104), so that the resistor group (2) can be easily inserted into the sleeve. The sleeve can be squeezed toward the middle to expand it outward to increase its inner diameter, thereby facilitating the insertion of the resistor group (2) into the sleeve.

4. The coiled structure arrester according to claim 1, characterized in that: The thickness of the spacer (3) is slightly larger than the thickness of the middle ring (101), and the spacer (3) and the middle ring (101) are clearance-matched. While ensuring the structural strength of the insulating positioning sleeve (1), the inner diameter of the middle ring (101) is as large as possible, so that the outer diameter of the spacer (3) is as large as possible.

5. The coiled structure arrester according to claim 1, characterized in that: The slots (104) are evenly distributed around the upper sleeve (102) and the lower sleeve (103), and the slots (104) are set at a distance from the outer surface of the middle ring (101), so that the parts of the upper sleeve (102) and the lower sleeve (103) close to the middle ring (101) form a complete circular ring, which can tightly embrace the outer surface of the resistor group (2) to temporarily fix it.

6. The coiled structure arrester according to claim 1, characterized in that: After both ends of the resistor chip group (2) are inserted into the interior of the insulating positioning sleeve (1), the upper sleeve (102) and the lower sleeve (103) of the two insulating positioning sleeves (1) almost wrap around the entire outer surface of the resistor chip group (2) and are bonded using glue.

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