Pressure release structure and lightning arrester

Abstract

The utility model relates to a pressure release structure and lightning arrester relates to lightning arrester field, the pressure release structure includes seal ring, pressure release plate, press ring and air guide frame, seal ring is fixed, seal ring has the vent hole, seal ring, pressure release plate and press ring are laminated, and seal ring and press ring are fixedly connected, the air guide frame has the vent hole. The air guiding frame is fixedly arranged and located on the side, away from the pressure releasing plate, of the pressing ring. The lightning arrester comprises the pressure release structure. The lightning arrester has the beneficial effects that when the pressure release plate is broken due to the extreme condition that the internal pressure of the lightning arrester is increased, the gas guide frame guides the gas released from the interior of the lightning arrester, so that the gas is released along a determined direction, and the internal pressure of the lightning arrester is prevented from damaging other equipment. The number and the area of the vent holes in the sealing ring can be increased or decreased according to the stress borne by the pressure release plate in different use environments, so that the actual stress borne by the pressure release plate is reduced, and the pressure release plate is prevented from being broken in the normal use period.

Description

Technical Field

[0001] The utility model relates to the field of lightning arresters, in particular to a pressure release structure and a lightning arrester. Background Art

[0002] A lightning arrester is an electrical device used to protect electrical equipment from high transient overvoltage hazards during lightning strikes, and to limit the follow-on time and often the follow-on amplitude. A lightning arrester is sometimes also called an overvoltage protector or overvoltage limiter.

[0003] For internally inflated arresters, if the pressure inside the arrester rises to an extreme, the pressure difference between the inside and outside of the pressure release plate will be too large, which will cause the pressure release plate to rupture, releasing the internal pressure to ensure safety. However, when the internal pressure is released, gas will spray out, posing a risk of damaging other equipment. Utility Model Content

[0004] The technical problem to be solved by the utility model is how to avoid damaging other equipment when the arrester pressure is released.

[0005] The utility model solves the above-mentioned technical problem through the following technical solution: a pressure release structure, comprising a sealing ring, a pressure release plate, a pressure ring and an air guide frame, wherein the sealing ring is fixedly arranged, the sealing ring has an air vent, the sealing ring, the pressure release plate and the pressure ring are stacked, and the sealing ring is fixedly connected to the pressure ring, and the air guide frame is fixedly arranged and located on the side of the pressure ring away from the pressure release plate.

[0006] The beneficial effects of the utility model are as follows: the sealing ring and the pressure ring are used to clamp and fix the pressure release plate, and the sealing ring and the air guide frame are fixedly connected to the shell of the arrester. When the pressure release plate ruptures due to the extreme situation of increased pressure inside the arrester, the air guide frame guides the gas released inside the arrester to release the gas in a certain direction, thereby preventing the internal pressure of the arrester from damaging other equipment. According to the stress borne by the pressure release plate in different use environments, the number and area of ​​the vent holes on the sealing ring can be increased or decreased to adjust the actual stress borne by the pressure release plate and prevent the pressure release plate from rupturing during normal use.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the sealing ring is made of steel, and the surface of the sealing ring is plated with a colored zinc layer.

[0009] Furthermore, an edge of one end of the vent hole facing the pressure release plate has a sealing ring fillet.

[0010] The beneficial effect of adopting the above further solution is that the edges of the vent holes are rounded to reduce the stress at the contact position between the pressure release plate and the edges of the vent holes.

[0011] Furthermore, it also includes a sealing ring, which is clamped between the sealing ring and the pressure ring.

[0012] The beneficial effect of adopting the above further solution is that the sealing ring is sandwiched between the sealing ring and the pressure ring, thereby ensuring the sealing performance of the sealing ring and the pressure ring, and further ensuring the sealing performance of the lightning arrester.

[0013] Furthermore, the material of the pressure release plate is a copper-clad phenolic paper laminate, and the thickness of the pressure release plate is 1 mm to 5 mm.

[0014] The beneficial effect of adopting the above further solution is: according to the stress borne by the pressure release plate in different use environments, pressure release plates of different thicknesses are selected to make the pressure release plate have a suitable allowable pressure.

[0015] Furthermore, a surface of the pressure release plate facing the sealing ring is plated with a nickel layer or a chromium layer.

[0016] The beneficial effect of adopting the above further solution is that the surface of the side of the pressure release plate that contacts the sealing ring is nickel-plated and chromium-plated to improve the strength of the pressure release plate.

[0017] Furthermore, the pressing ring is made of steel, and the surface of the pressing ring is plated with a zinc layer.

[0018] Furthermore, the pressure ring and an edge on one side facing the pressure release plate have a pressure ring fillet.

[0019] The beneficial effect of adopting the above further solution is that the corners of one side of the pressure ring and the pressure release plate are rounded to reduce the stress at the contact edge of the pressure release plate and the pressure ring.

[0020] Furthermore, the air guide frame includes a guide ramp and a guide flat plate, one end of the guide ramp is arranged close to one end of the pressure ring, the other end of the guide ramp is away from the pressure ring and extends toward the axis of the pressure ring, the other end of the guide ramp is fixedly connected to one end of the guide flat plate, and the guide flat plate is parallel to the pressure ring; the material of the air guide frame is steel, and the surface of the air guide frame is coated with zinc.

[0021] The beneficial effect of adopting the above further scheme is that after the pressure release plate ruptures, the gas is discharged to the other end of the pressure ring under the guidance of the guide inclined plate, and the guide flat plate further guides the gas to the other end of the pressure ring, and at the same time can block the gas discharged along the axial direction of the pressure ring to prevent the gas pressure from damaging other equipment.

[0022] The utility model also provides a lightning arrester, which comprises a pressure release structure.

[0023] The beneficial effect is that when the internal pressure of the arrester rises abnormally, the pressure release plate of the pressure release structure ruptures to release the internal gas, and the gas guide frame releases the gas in a certain direction to prevent the internal pressure of the arrester from damaging other equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a partial structural diagram of the arrester with pressure release structure of the utility model;

[0025] Figure 2 This is a structural diagram of a sealing ring with two vents of the utility model;

[0026] Figure 3 This is a structural diagram of a sealing ring with four vent holes according to the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Sealing ring; 101. Vent hole; 2. Sealing ring; 3. Pressure release plate; 4. Pressure ring; 5. Air guide frame. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] like Figure 1-Figure 3 As shown, this embodiment provides a pressure release structure, including a sealing ring 1, a pressure release plate 3, a pressure ring 4 and an air guide frame 5. The sealing ring 1 is fixedly arranged, and the sealing ring 1 has a vent hole 101. The sealing ring 1, the pressure release plate 3 and the pressure ring 4 are stacked, and the sealing ring 1 is fixedly connected to the pressure ring 4. The air guide frame 5 is fixedly arranged and located on the side of the pressure ring 4 away from the pressure release plate 3.

[0031] The sealing ring 1 and the pressure ring 4 are used to clamp and fix the pressure release plate 3, and the sealing ring 1 and the air guide frame 5 are fixedly connected to the shell of the lightning arrester. When the pressure inside the lightning arrester rises in an extreme situation and causes the pressure release plate 3 to rupture, the air guide frame 5 guides the gas released inside the lightning arrester so that the gas is released in a certain direction to prevent the internal pressure of the lightning arrester from damaging other equipment. Among them, when the internal and external pressure difference on both sides of the pressure release plate 3 remains unchanged, the larger the total area of ​​the vents 101, the smaller the support area of ​​the sealing ring 1 for the pressure release plate 3, and the easier it is for the pressure release plate 3 to rupture. Therefore, according to the stress borne by the pressure release plate 3 under different use environments, the number and area of ​​the vents 101 on the sealing ring 1 can be increased or decreased to adjust the actual stress borne by the pressure release plate 3, so that the pressure release plate 3 will only rupture under the designed internal and external pressure difference, preventing the pressure release plate from rupturing during normal use.

[0032] Optionally, there are one or more vent holes 101, and the vent holes 101 are arranged in any manner on the sealing ring 1. Optionally, the vent holes 101 can be in any shape, such as a rectangle, a circle, or a fan. In one specific example, Figure 2 and 3As shown, a plurality of vent holes 101 are evenly distributed along the circumference of the sealing ring 1, and the vent holes 101 are fan-shaped. Figure 2 The seal ring 1 is shown as having two vent holes 101. Figure 3 A sealing ring 1 having four ventilation holes 101 is shown.

[0033] Specifically, the air guide frame 5 is fixed to the arrester flange by air guide frame mounting bolts.

[0034] Specifically, Figure 1 As shown, the assembly bolts pass through the pressure ring 4 and the sealing ring 1 in sequence and are fixed to the arrester flange, thereby pressing and fixing the pressure release plate 3 between the pressure ring 4 and the sealing ring 1.

[0035] On the basis of any of the above solutions, the sealing ring 1 is made of steel, and the surface of the sealing ring 1 is plated with a colored zinc layer.

[0036] Based on any of the above solutions, the edge of one end of the vent hole 101 facing the pressure release plate 3 has a sealing ring fillet.

[0037] The edges of the vent hole 101 are rounded to reduce the stress at the contact position between the pressure release plate 3 and the edges of the vent hole 101 .

[0038] On the basis of any of the above solutions, it further includes a sealing ring 2 , which is sandwiched between the sealing ring 1 and the pressure ring 4 .

[0039] The sealing ring 2 is sandwiched between the sealing ring 1 and the pressing ring 4 to ensure the sealing performance of the sealing ring 1 and the pressing ring 4, thereby ensuring the sealing performance of the arrester.

[0040] Furthermore, there are two sealing rings 2, one of which is sandwiched between the sealing ring 1 and the pressure ring 4, and the other sealing ring 2 is sandwiched between the sealing ring 1 and the arrester flange.

[0041] Specifically, the sealing ring 2 is made of chloroprene rubber and has a rectangular cross section. The rectangular shape has a large contact area, thereby improving the sealing performance of the arrester.

[0042] On the basis of any of the above solutions, the material of the pressure release plate 3 is a copper-clad phenolic paper laminate, and the thickness of the pressure release plate 3 is 1 mm to 5 mm.

[0043] According to the stress borne by the pressure release plate 3 in different use environments, pressure release plates 3 of different thicknesses are selected to ensure that the pressure release plate 3 has a suitable allowable pressure.

[0044] On the basis of any of the above solutions, a surface of the pressure release plate 3 facing the sealing ring 1 is plated with a nickel layer or a chromium layer.

[0045] The surface of the pressure release plate 3 that contacts the sealing ring 1 is plated with nickel and chromium to improve the strength of the pressure release plate 3 .

[0046] On the basis of any of the above solutions, the pressing ring 4 is made of steel, and the surface of the pressing ring 4 is plated with a zinc layer.

[0047] Specifically, the surface of the pressure ring 4 is hot-dip galvanized.

[0048] Based on any of the above solutions, the pressure ring 4 and the edge on one side facing the pressure release plate 3 have a pressure ring fillet.

[0049] One side of the pressure ring 4 and the pressure release plate 3 is rounded to reduce the stress at the contact edge of the pressure release plate 3 and the pressure ring 4.

[0050] Based on any of the above schemes, the air guide frame 5 includes a guide ramp plate and a guide flat plate, one end of the guide ramp plate is arranged close to one end of the pressure ring 4, the other end of the guide ramp plate is away from the pressure ring 4 and extends toward the axial direction of the pressure ring 4, the other end of the guide ramp plate is fixedly connected to one end of the guide flat plate, and the guide flat plate is parallel to the pressure ring 4; the material of the air guide frame 5 is steel, and the surface of the air guide frame 5 is coated with a zinc layer.

[0051] After the pressure release plate 3 ruptures, the gas is discharged to the other end of the pressure ring 4 under the guidance of the guide inclined plate. The guide flat plate further guides the gas to the other end of the pressure ring 4, and at the same time can block the gas discharged along the axial direction of the pressure ring 4 to prevent the gas pressure from damaging other equipment.

[0052] Specifically, the surface of the air guide frame 5 is treated by hot-dip galvanizing.

[0053] This embodiment also provides a lightning arrester, including a pressure release structure.

[0054] When the internal pressure of the arrester increases abnormally, the pressure release plate 3 of the pressure release structure ruptures to release the internal gas, and the gas guide frame 5 releases the gas in a certain direction to prevent the internal pressure of the arrester from damaging other equipment.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the term "circumferential" etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0056] In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pressure release structure, characterized in that: The invention comprises a sealing ring (1), a pressure release plate (3), a pressure ring (4) and an air guide frame (5); the sealing ring (1) is fixedly arranged, the sealing ring (1) has an air vent (101), the sealing ring (1), the pressure release plate (3) and the pressure ring (4) are stacked, and the sealing ring (1) is fixedly connected to the pressure ring (4); the air guide frame (5) is fixedly arranged and is located on a side of the pressure ring (4) away from the pressure release plate (3).

2. A pressure release structure according to claim 1, characterized in that: The sealing ring (1) is made of steel, and the surface of the sealing ring (1) is plated with a colored zinc layer.

3. A pressure release structure according to claim 1, characterized in that: An edge of one end of the vent hole (101) facing the pressure release plate (3) has a sealing ring fillet.

4. A pressure release structure according to claim 1, characterized in that: It also comprises a sealing ring (2), wherein the sealing ring (2) is sandwiched between the sealing ring (1) and the pressure ring (4).

5. A pressure release structure according to claim 1, characterized in that: The material of the pressure release plate (3) is a copper-clad phenolic paper laminate, and the thickness of the pressure release plate (3) is 1 mm to 5 mm.

6. A pressure release structure according to claim 1, characterized in that: A surface of the pressure release plate (3) facing the sealing ring (1) is plated with a nickel layer or a chromium layer.

7. A pressure release structure according to claim 1, characterized in that: The material of the pressure ring (4) is steel, and the surface of the pressure ring (4) is plated with a zinc layer.

8. A pressure release structure according to claim 1, characterized in that: The pressure ring (4) and an edge on one side facing the pressure release plate (3) have a pressure ring fillet.

9. A pressure release structure according to any one of claims 1 to 8, characterized in that: The air guide frame (5) comprises a guide inclined plate and a guide flat plate, one end of the guide inclined plate is arranged close to one end of the pressure ring (4), the other end of the guide inclined plate is away from the pressure ring (4) and extends in the axial direction of the pressure ring (4), the other end of the guide inclined plate is fixedly connected to one end of the guide flat plate, and the guide flat plate is parallel to the pressure ring (4); the material of the air guide frame (5) is steel, and the surface of the air guide frame (5) is coated with a zinc layer.

10. A lightning arrester, characterized in that: Comprising the pressure release structure as described in any one of claims 1-9.

Images