Insulation cover plate assembly and lightning arrester

Abstract

The insulating cover plate assembly comprises an insulating cover plate, a pressing ring and a first sealing piece, the insulating cover plate comprises a wiring board, a core body mounting base and an insulating plate, the first end of the wiring board is arranged in the insulating plate, the second end of the wiring board is exposed out of the insulating plate from the circumferential side wall of the insulating plate, a first waterproof sealing groove is formed in the first side of the insulating plate, and a second waterproof sealing groove is formed in the second side of the insulating plate; the core body mounting seat is used for being electrically connected with a lightning arrester core body, the first end of the core body mounting seat is arranged in the insulating plate and electrically connected with the first end of the wiring board, and the second end of the core body mounting seat is exposed out of the first side of the insulating plate and penetrates through the first waterproof sealing groove; the pressing ring is connected with the second end of the core body mounting seat; the first sealing piece is arranged in the first waterproof sealing groove and pressed between the insulating plate and the pressing ring. According to the invention, the inner cavity of the lightning arrester is physically isolated from the position of the core body mounting seat where air leakage easily occurs through the design of the sealing structure at the connecting position of the insulating plate and the core body mounting seat, so that the sealing integrity of the lightning arrester is ensured, and the product quality is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arresters, and more particularly to an insulating cover plate assembly and a lightning arrester. Background Art

[0002] The function of the arrester is to protect electrical equipment from high transient overvoltage and to limit the follow-on time and amplitude. In a seat-type installation, whether it is a porcelain-coated or composite-coated arrester, its low-voltage end usually needs to be insulated from the installation platform to ensure electrical safety. Among them, the insulating base and the insulating cover are commonly used insulating structures. However, the insulating cover currently used has certain problems in terms of sealing, which can easily lead to sealing failure of the arrester. Therefore, how to effectively ensure the sealing of the insulating cover and prevent the sealing failure of the arrester has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an insulating cover plate assembly to effectively ensure the sealing of the insulating cover plate, thereby preventing the sealing failure of the lightning arrester.

[0004] Another object of the present invention is to provide a lightning arrester including the above-mentioned insulating cover plate assembly.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An insulating cover assembly, comprising:

[0007] An insulating cover plate, comprising a wiring board, a core mounting seat and an insulating plate, wherein a first end of the wiring board is arranged in the insulating plate, and a second end is exposed from the insulating plate, a first side of the insulating plate is provided with a first waterproof sealing groove, a first end of the core mounting seat is arranged in the insulating plate and is electrically connected to the first end of the wiring board, and a second end is exposed from the first side of the insulating plate and passes through the first waterproof sealing groove, the wiring board and the core mounting seat are both made of metal materials, and the insulating plate is made of insulating material;

[0008] A pressure ring connected to the second end of the core mounting seat;

[0009] The first sealing member is arranged in the first waterproof sealing groove and is pressed tightly between the insulating plate and the pressing ring.

[0010] Optionally, in the above-mentioned insulating cover plate assembly, a moisture-proof sealing groove and a second waterproof sealing groove are provided on the first side of the insulating plate, and the first waterproof sealing groove, the moisture-proof sealing groove and the second waterproof sealing groove are all arranged coaxially with the insulating plate, and the moisture-proof sealing groove is provided between the first waterproof sealing groove and the second waterproof sealing groove.

[0011] Optionally, in the above-mentioned insulating cover plate assembly, a pressure relief hole is opened on the insulating plate in the axial direction, and the number of the pressure relief hole is at least one, and the pressure relief hole is arranged between the first waterproof sealing groove and the moisture-proof sealing groove;

[0012] An explosion-proof plate is disposed on the second side of the insulating plate, and the explosion-proof plate is arranged opposite to the pressure relief hole.

[0013] Optionally, in the above-mentioned insulating cover plate assembly, a third waterproof sealing groove is opened on the second side of the insulating plate, a second sealing member is arranged in the third waterproof sealing groove, and the second sealing member is pressed between the insulating plate and the explosion-proof plate.

[0014] Optionally, in the above-mentioned insulating cover plate assembly, a plurality of bolt mounting holes are opened through the insulating plate in the axial direction, and the plurality of bolt mounting holes are evenly arranged around the axial direction of the insulating plate;

[0015] A pressing plate is provided on the second side of the insulating plate. The pressing plate is bolted to the insulating plate through the bolt mounting holes and presses the explosion-proof plate tightly against the pressure relief hole.

[0016] Optionally, in the above-mentioned insulating cover plate assembly, the insulating plate is prepared as a whole with the terminal block and the core mounting seat through a molding process, a vacuum casting process, or an automatic pressure gel process.

[0017] Optionally, in the above-mentioned insulating cover plate assembly, the terminal block and the core mounting seat are both made of aluminum;

[0018] The insulating plate is made of bulk molding compound or epoxy resin.

[0019] Optionally, in the above-mentioned insulating cover plate assembly, a threaded hole is provided on the pressure ring, and the second end of the core mounting seat is threadedly disposed in the threaded hole.

[0020] Optionally, in the above-mentioned insulating cover plate assembly, the number of the core mounting seats is one or more.

[0021] A lightning arrester comprises the above-mentioned insulating cover plate assembly.

[0022] The insulating cover assembly provided by the present invention includes an insulating cover, a pressure ring and a first sealing member. The insulating cover includes a terminal block, a core mounting seat and an insulating plate. The first end of the terminal block is arranged in the insulating plate, and the second end is exposed to the insulating plate through the circumferential side wall of the insulating plate. A first waterproof sealing groove is arranged on the first side of the insulating plate. The core mounting seat is used to be electrically connected to the arrester core, and its first end is arranged in the insulating plate and electrically connected to the first end of the terminal block, and the second end is exposed to the first side of the insulating plate and passes through the first waterproof sealing groove. The terminal block and the core mounting seat are both made of metal materials, and the insulating plate is made of insulating material; the pressure ring is connected to the second end of the core mounting seat; the first sealing member is arranged in the first waterproof sealing groove and is pressed between the insulating plate and the pressure ring.

[0023] Compared with the prior art, the insulating cover plate assembly provided by the present invention can completely replace the insulating base, and through the sealing structure design at the connection position between the insulating plate and the core body mounting seat, the inner cavity of the lightning arrester and the core body mounting seat position which is prone to leakage are physically isolated, so that even if there are gaps at the junction of the insulating plate and the core body mounting seat, the sealing of the lightning arrester is not affected, thereby ensuring the integrity of the sealing of the lightning arrester, thereby reducing the impact of the manufacturing process on the sealing performance of the insulating cover plate, greatly improving product quality and reducing production costs.

[0024] The lightning arrester provided by the present invention includes the above-mentioned insulating cover plate assembly, so it also has the above-mentioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 An exploded view of the insulating cover assembly disclosed in an embodiment of the present invention;

[0027] Figure 2 An assembly diagram of an insulating cover plate assembly disclosed in an embodiment of the present invention;

[0028] Figure 3 Axonometric view of the insulating cover plate disclosed in the embodiment of the present invention Figure 1 ;

[0029] Figure 4 Axonometric view of the insulating cover plate disclosed in the embodiment of the present invention Figure 2 ;

[0030] Figure 5An axonometric view of an insulating plate disclosed in an embodiment of the present invention;

[0031] Figure 6 A top view of an insulating plate disclosed in an embodiment of the present invention;

[0032] Figure 7 for Figure 6 Sectional view at AA in the middle;

[0033] Figure 8 for Figure 6 Cross-section at the middle BB;

[0034] Fig. 9 A schematic diagram of the connection between the wiring board and the core mounting seat disclosed in the embodiment of the present invention;

[0035] Fig.10 The structure of the pressure ring disclosed in the embodiment of the present invention is schematically shown Figure 1 ;

[0036] Fig.11 The structure of the pressure ring disclosed in the embodiment of the present invention is schematically shown Figure 2 .

[0037] Among them, 100 is an insulating plate, 101 is a first waterproof sealing groove, 102 is a pressure relief hole, 103 is a moisture-proof sealing groove, 104 is a second waterproof sealing groove, 105 is a bolt mounting hole, 106 is a third waterproof sealing groove, 107 is a first mounting hole, 108 is a second mounting hole, 110 is a core mounting seat, 120 is a terminal block, 121 is a connecting hole, 200 is a pressure ring, and 201 is a threaded hole. DETAILED DESCRIPTION

[0038] The core of the present invention is to disclose an insulating cover plate assembly to effectively ensure the sealing of the insulating cover plate, thereby preventing the arrester from sealing failure.

[0039] Another core of the present invention is to disclose a lightning arrester including the above-mentioned insulating cover plate assembly.

[0040] The following embodiments are described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention contents described in the claims. In addition, the entire contents of the structures represented by the following embodiments are not limited to those necessary as solutions to the inventions described in the claims. It should be noted that, for ease of description, only the parts related to the inventions are shown in the accompanying drawings. The embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0041] Combination Figure 1-Figure 11The insulating cover assembly disclosed in the present invention includes an insulating cover, a pressure ring 200 and a first sealing member (not shown in the figure), the insulating cover includes a terminal block 120, a core mounting seat 110 and an insulating plate 100, the first end of the terminal block 120 is arranged in the insulating plate 100, and the second end is exposed to the insulating plate 100 by the circumferential side wall of the insulating plate 100, and the first side of the insulating plate 100 is provided with a first waterproof sealing groove 101, the core mounting seat 110 is used to be electrically connected to the arrester core, and its first end is arranged in the insulating plate 100 and electrically connected to the first end of the terminal block 120, and the second end is exposed to the first side of the insulating plate 100 and passes through the first waterproof sealing groove 101, the terminal block 120 and the core mounting seat 110 are both made of metal materials, and the insulating plate 100 is made of insulating material; the pressure ring 200 is connected to the second end of the core mounting seat 110; the first sealing member is arranged in the first waterproof sealing groove 101 and is pressed between the insulating plate 100 and the pressure ring 200.

[0042] The applicant has discovered that the current insulating cover is prone to air leakage, which in turn leads to failure of the lightning arrester seal. The reason is that the thermal expansion coefficients of the insulating plate 100, the terminal board 120 and the core mounting seat 110 are different, resulting in a gap between the insulating plate 100, the terminal board 120 and the core mounting seat 110 during the preparation process, which in turn leads to air leakage. Therefore, the present invention seals the connection position between the insulating plate 100 and the core mounting seat 110 by adding a pressure ring 200 and a first sealing member, thereby avoiding air leakage at the connection position between the two and ensuring the sealing effect of the lightning arrester.

[0043] Compared with the prior art, the insulating cover plate assembly disclosed in the present invention can completely replace the insulating base, and through the sealing structure design at the connection position between the insulating plate 100 and the core mounting seat 110, the inner cavity of the lightning arrester and the position of the core mounting seat 110 which is prone to leakage are physically isolated, so that even if there are pores at the junction of the insulating plate 100 and the core mounting seat 110, the sealing of the lightning arrester is not affected, thereby ensuring the integrity of the sealing of the lightning arrester, thereby reducing the influence of the manufacturing process on the sealing performance of the insulating cover plate, greatly improving product quality and reducing production costs.

[0044] Specifically, low-voltage wiring of a monitoring device or the like can be connected to the connection hole 121 on the wiring board 120 to achieve a low-voltage wiring function.

[0045] Combination Figure 3, a moisture-proof sealing groove 103 and a second waterproof sealing groove 104 are provided on the first side of the insulating plate 100, the first waterproof sealing groove 101, the moisture-proof sealing groove 103 and the second waterproof sealing groove 104 are all arranged coaxially with the insulating plate 100, and the moisture-proof sealing groove 103 is arranged between the first waterproof sealing groove 101 and the second waterproof sealing groove 104. The moisture-proof sealing groove 103 and the second waterproof sealing groove 104 are used to fill the waterproof sealing material, so that the second waterproof sealing groove 104 can prevent water from directly entering the interior of the arrester, protecting the electrical components inside the arrester from being affected by water immersion, and the moisture-proof sealing groove 103 can prevent moisture from entering the interior of the arrester, avoiding corrosion and influence of moisture on the electrical components.

[0046] Combination Figure 3 and Figure 4 , a pressure relief hole 102 is provided on the insulating plate 100 along the axial direction, and there is at least one pressure relief hole 102, which is arranged between the first waterproof sealing groove 101 and the moisture-proof sealing groove 103. An explosion-proof plate (not shown in the figure) is provided on the second side of the insulating plate 100, and the explosion-proof plate and the pressure relief hole 102 are arranged relative to each other. Exemplarily, the number of pressure relief holes 102 can be 2 to 4. The pressure relief hole 102 is used to provide a weak point when the pressure in the arrester is unbalanced to form a pressure relief channel. Specifically, when a fault occurs inside the arrester or when it encounters a condition that it cannot bear the load during operation, hot high-pressure gas will be released. These high-pressure gases will be released through the pressure relief hole 102 as a pressure weak point and break the explosion-proof plate to avoid the internal pressure of the arrester from continuing to increase and causing a violent explosion accident, thereby ensuring the safety of nearby equipment and personnel.

[0047] A plurality of bolt mounting holes 105 are provided on the insulating plate 100 in the axial direction, and the plurality of bolt mounting holes 105 are evenly arranged around the axial direction of the insulating plate 100, and are used for direct assembly and connection with the lightning arrester, and for ensuring the uniformity of force on the insulating plate 100. In some embodiments, a pressing plate is provided on the second side of the insulating plate 100, and the pressing plate is bolted to the insulating plate 100 through the bolt mounting holes 105, and is used to press the explosion-proof plate against the pressure relief hole 102, and the pressing plate, the insulating plate 100 and the lightning arrester are connected together through the bolt mounting holes 105.

[0048] Combination Figure 4 A third waterproof sealing groove 106 is provided on the second side of the insulating plate 100, a second sealing member is provided in the third waterproof sealing groove 106, and the second sealing member is pressed between the insulating plate 100 and the explosion-proof plate. The second sealing member, the explosion-proof plate and the pressure plate are assembled and jointly provide sealing function and pressure relief function.

[0049] Specifically, the insulating plate 100 can be manufactured as a whole with the terminal block 120 and the core mounting seat 110 by a molding process, a vacuum casting process, or an automatic pressure gel process. The curing agent used in the manufacturing process can be anhydride, and the filler can be silicon dioxide. Figure 7 and Figure 8 The first mounting hole 107 and the second mounting hole 108 are spaces used by the insulating plate 100 to cover the core mounting seat 110 and the terminal block 120 .

[0050] In some embodiments, the terminal block 120 and the core mount 110 are both made of aluminum, and the insulating plate 100 is made of BMC (bulk molding compound) or epoxy resin. The thermal expansion coefficient of aluminum is 23.2×10 -6 / K, the thermal expansion coefficient of BMC is (13~35)×10 -6 / K, the thermal expansion coefficients of aluminum and BMC are close, so that the shrinkage values ​​of the insulating plate 100, the terminal block 120 and the core mounting seat 110 are close during curing, thereby reducing the generation of internal stress and further reducing the problem of cracking of the insulating cover when subjected to thermal stress.

[0051] The terminal block 120 and the core mounting base 110 may be connected by welding or bolts to ensure the reliability of the connection.

[0052] In some embodiments, in combination Figure 2 , Fig.10 and Fig.11 A threaded hole 201 is provided on the pressing ring 200, and the second end of the core mounting seat 110 is threadedly arranged in the threaded hole 201, which is convenient for disassembly and assembly.

[0053] The number of the core mounting seat 110 can be one or more. Specifically, when there is one core mounting seat 110, the core mounting seat 110 is arranged at the center of the insulating plate 100 and is electrically connected to the terminal block 120; when there are multiple core mounting seats 110, each core mounting seat 110 is arranged in the first sealing member and is electrically connected to the terminal block 120.

[0054] In terms of electrical performance, the insulating cover assembly disclosed in the present invention can provide low-voltage wiring function and electrical insulation function; in terms of mechanical structure, it can provide arrester core fixing installation function, arrester sealing function during normal operation and explosion-proof function during short circuit fault.

[0055] The lightning arrester disclosed in the present invention includes the above-mentioned insulating cover plate assembly, so it also has the above-mentioned structure and beneficial effects. Other structures refer to the prior art and will not be described in detail here.

[0056] The above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. The specific technical means in some embodiments can be combined in part or in whole into another embodiment without being explicitly excluded by another embodiment. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. An insulating cover assembly, characterized in that: include: An insulating cover plate, comprising a wiring board (120), a core mounting seat (110) and an insulating plate (100); a first end of the wiring board (120) is arranged inside the insulating plate (100), and a second end is exposed outside the insulating plate (100); a first side of the insulating plate (100) is provided with a first waterproof sealing groove (101); a first end of the core mounting seat (110) is arranged inside the insulating plate (100) and is electrically connected to the first end of the wiring board (120), and a second end is exposed outside the first side of the insulating plate (100) and passes through the first waterproof sealing groove (101); the wiring board (120) and the core mounting seat (110) are both made of metal material, and the insulating plate (100) is made of insulating material; A pressure ring (200) connected to the second end of the core mounting seat (110); A first sealing member is arranged in the first waterproof sealing groove (101) and is pressed tightly between the insulating plate (100) and the pressing ring (200).

2. The insulating cover assembly according to claim 1, characterized in that: A moisture-proof sealing groove (103) and a second waterproof sealing groove (104) are provided on a first side of the insulating plate (100); the first waterproof sealing groove (101), the moisture-proof sealing groove (103) and the second waterproof sealing groove (104) are all arranged coaxially with the insulating plate (100); and the moisture-proof sealing groove (103) is arranged between the first waterproof sealing groove (101) and the second waterproof sealing groove (104).

3. The insulating cover assembly according to claim 2, characterized in that: The insulating plate (100) is provided with a pressure relief hole (102) extending therethrough in the axial direction. There is at least one pressure relief hole (102) arranged between the first waterproof sealing groove (101) and the moisture-proof sealing groove (103); An explosion-proof plate is provided on the second side of the insulating plate (100), and the explosion-proof plate is arranged opposite to the pressure relief hole (102).

4. The insulating cover assembly according to claim 3, characterized in that: A third waterproof sealing groove (106) is provided on the second side of the insulating plate (100), a second sealing member is arranged in the third waterproof sealing groove (106), and the second sealing member is pressed tightly between the insulating plate (100) and the explosion-proof plate.

5. The insulating cover assembly according to claim 3, characterized in that: A plurality of bolt mounting holes (105) are provided on the insulating plate (100) in an axial direction, and the plurality of bolt mounting holes (105) are evenly arranged in an axial direction around the insulating plate (100); A pressing plate is provided on the second side of the insulating plate (100); the pressing plate is bolted to the insulating plate (100) through the bolt mounting holes (105) and presses the explosion-proof plate against the pressure relief hole (102).

6. The insulating cover assembly according to claim 1, characterized in that: The insulating plate (100) is manufactured as a whole with the wiring board (120) and the core mounting seat (110) through a molding process, a vacuum casting process, or an automatic pressure gel process.

7. The insulating cover assembly according to claim 6, characterized in that: The wiring board (120) and the core mounting seat (110) are both made of aluminum; The insulating plate (100) is made of bulk molding compound or epoxy resin.

8. The insulating cover assembly according to claim 1, characterized in that: The pressure ring (200) is provided with a threaded hole (201), and the second end of the core mounting seat (110) is threadedly disposed in the threaded hole (201).

9. The insulating cover assembly according to claim 1, characterized in that: The number of the core mounting seats (110) is one or more.

10. A lightning arrester, characterized in that: It comprises the insulating cover plate assembly as described in any one of claims 1 to 9.

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