An integrated sealing component based on lightning protection and arc extinction

Abstract

The present invention discloses an integrated sealing component based on lightning protection and arc extinction. The sealing component includes a gas generating component, a sealing package, a turntable, and an arc extinguishing cylinder. A plurality of uniformly distributed grooves are arranged on the surface of the turntable along the circumferential direction, and air jet holes are provided at the center of the bottom of each groove. The gas generating component is hermetically wrapped in the sealing package. The upper half of the sealing package is hermetically wrapped and installed below the top opening and above the bottom of the groove. The lower half of the sealing package is sleeved in the arc extinguishing cylinder. The arc extinguishing cylinder is used to support the sealing package and provide a supporting force when the lower half of the sealing package can extend downward from the air jet hole into the top opening of the arc extinguishing cylinder for sealed communication, so that a sealed state is formed between the lower half of the sealing package and the top opening of the arc extinguishing cylinder. The sealing component of the present invention can effectively improve the sealing performance of the air flow channel between the turntable and the arc extinguishing cylinder, and maximize the action of the jet air flow on the arc.

Description

Technical Field

[0001] The present invention belongs to the technical field of lightning protection and arc extinction, and particularly relates to an integrated sealing component based on lightning protection and arc extinction. Background Art

[0002] Lightning protection of transmission lines has always been an important part of the lightning protection work of the power department. Lightning faults are still one of the important factors affecting the safety of the power grid. For a long time, lightning has been the main cause of transmission line fault tripping. When a transmission line is struck by lightning, the insulator on the transmission line flashes over, followed by the power frequency follow current, which damages the insulator string and fittings, resulting in the burning of the insulator string and the burning and breaking of the wire. For this reason, the power department generally installs line lightning arresters on the transmission line to achieve protection. The application number of a Chinese patent is: 201610747255.3, and the patent name is: Lightning-induced solid-phase arc extinguishing lightning arrester. Although this arc extinguishing lightning arrester has strong arc extinguishing ability, stable and reliable operation, and quick and convenient replacement of the arc extinguishing gas pill, the jet airflow will leak at the connection between the arc extinguishing turntable and the arc extinguishing cylinder. Considering that the non-concentrated airflow is not sufficient for the arc, the arc extinguishing ability and lightning protection effect of the arc extinguishing lightning arrester are affected. Therefore, it is hoped that the jet airflow can act on the arc maximally and the sealing performance of the arc extinguishing airflow channel can be improved to enhance the intensity of the arc extinguishing airflow. Therefore, an integrated sealing component based on lightning protection and arc extinction is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated sealing component based on lightning protection and arc extinction. The sealing component of the present invention can effectively improve the sealing performance of the airflow channel between the turntable and the arc extinguishing cylinder, make the jet airflow act on the arc maximally, improve the reliability of lightning protection and arc extinction, and the structure of the sealing component also improves the safety of arc extinguishing and lightning protection. To achieve the above purpose, the present invention adopts the following technical effects:

[0004] According to one aspect of the present invention, an integrated sealing component based on lightning protection and arc extinction is provided. The sealing component includes a gas generating element, a sealing package, a turntable, and an arc extinguishing cylinder. A plurality of uniformly distributed grooves are arranged on the surface of the turntable along the circumferential direction, and air injection holes are arranged at the center of the bottom of each groove. The gas generating element is hermetically wrapped in the sealing package. The upper half of the sealing package is hermetically wrapped and installed below the top opening and above the bottom of the groove. The lower half of the sealing package is sleeved in the arc extinguishing cylinder. The arc extinguishing cylinder is used to support the sealing package and provide a supporting force for the lower half of the sealing package to extend downward from the air injection hole into the top opening of the arc extinguishing cylinder for sealed connection, so that the lower half of the sealing package and the top opening of the arc extinguishing cylinder form a sealed state.

[0005] Preferably, a bottom plate and a clamping plate are respectively arranged on the upper and lower disk surfaces of the turntable. The sealing packages are respectively sealed in the grooves arranged on the turntable through the bottom plate and the clamping plate. The sealing package has a sealed package cavity part, a shoulder extending from the lower end of the sealed package cavity part, and a neck extending downward from the shoulder and gradually decreasing. The gas generating element is hermetically arranged in the sealed package cavity part. The sealed package cavity part is sealed in the groove between the top opening and the bottom end of the groove through the bottom plate and the clamping plate. The shoulder is clamped and fixed at the bottom end of the groove through the clamping plate. When the gas generating element is triggered to generate strong air flow in the sealing package, the neck of the sealing package sequentially passes through the air injection hole and the clamping plate from top to bottom and is inserted into the top barrel opening of the arc extinguishing cylinder for sealed connection.

[0006] More preferably, a rigid support housing is arranged above the top barrel opening of the arc extinguishing cylinder. When the gas generating element is triggered to generate strong air flow in the sealing package, the neck of the sealing package is inserted into the top barrel opening of the arc extinguishing cylinder through the support housing for sealed connection.

[0007] More preferably, the upper end surface of the support housing is a smooth surface. The center of the upper end surface of the support housing has an upper opening part. The lower end surface of the support housing has a flared lower opening part. When the gas generating element is triggered to generate strong air flow in the sealing package, the neck of the sealing package is inserted into the upper opening part of the support housing. The lower opening of the support housing is in sealed connection with the top barrel opening of the arc extinguishing cylinder, so that the neck of the sealing package is inserted into the top barrel opening of the arc extinguishing cylinder through the support housing for sealed connection.

[0008] More preferably, a spring (8) is arranged on the edge of the top barrel opening part of the arc extinguishing cylinder. The spring is sleeved on the outer wall of the lower opening part of the support housing. The lower end of the spring is connected to the outer side of the edge of the top barrel opening of the arc extinguishing cylinder. The upper end of the spring is connected to the outer wall of the lower surface of the support housing.

[0009] More preferably, a U-shaped sealing ring is further arranged in the support housing. The U-shaped sealing ring is nested on the inner wall of the upper opening part of the support housing. When the gas generating element is triggered to generate strong air flow in the sealing package and the neck of the sealing package is inserted into the upper opening part of the support housing, the outer wall of the mouth part of the neck is in contact sealing with the U-shaped sealing ring.

[0010] More preferably, the gas generating element is composed of a trigger electrode, a gas pill, and a frame body tightly wrapped around the outside of the gas pill. The bottom end of the frame body has a jet orifice, and the jet orifice and the outlet of the neck are on the same vertical axis. The trigger electrode sequentially passes through the frame body and the outside of the sealed package cavity part upward from inside the gas pill and is electrically connected to the bottom plate.

[0011] Further preferably, in the gas pill, one or more trigger electrodes are led out upward.

[0012] Further preferably, the length of the neck is between 1 cm and 4 cm, the diameter of the smallest part of the neck does not exceed 1 cm, and the diameter of the largest part of the neck does not exceed 2 cm.

[0013] In summary, since the present invention adopts the above technical solutions, the present invention has the following technical effects:

[0014] (1) The sealing component of the present invention has a simple structure, well prevents the leakage of strong air flow, and can ensure that the generated strong air flow acts on the arc maximally.

[0015] (2) The present invention ingeniously combines the switching mechanism and the sealing structure into one, with a simple structure and a not complex connection relationship, greatly enhancing the reliability of lightning protection and arc extinguishing. When the gas generating element generates strong air flow in the sealed package, the support shell at the top of the arc extinguishing cylinder can move up and down (slide) under the action of the spring, and it is ensured that there is no left - right deviation, improving the reliability of lightning protection and arc extinguishing. The structure of this sealing component also improves the safety of arc extinguishing and lightning protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of an integrated sealing component based on lightning protection and arc extinguishing of the present invention;

[0017] Figure 2 is a schematic structural diagram of the turntable of the present invention;

[0018] Figure 3 is a schematic structural diagram of the gas generating element of the present invention.

[0019] In the drawings, the gas generating element 1, the sealed package 2, the turntable 3, the bottom plate 4, the clamping plate 5, the support shell 6, the U - shaped sealing ring 7, the spring 8, the arc extinguishing cylinder 9, the trigger electrode 10, the gas pill 11, the frame body 12, the air jet port 13, the sealed cavity part 20, the shoulder part 21, the neck part 22, the groove 30, the air jet hole 31. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following preferred embodiments are cited with reference to the accompanying drawings, and the present invention is further described in detail. However, it should be noted that many details listed in the specification are only for enabling the reader to have a thorough understanding of one or more aspects of the present invention, and these aspects of the present invention can be implemented even without these specific details.

[0021] Such as Figure 1 、 Figure 2 and Figure 3As shown, according to one aspect of the present invention, an integrated sealing component based on lightning protection and arc extinguishing is provided. The sealing component includes a gas generating element 1, a sealing package 2, a turntable 3, and an arc extinguishing cylinder 9. On the disk surface of the turntable 3 and along the circumferential direction, a number of uniformly distributed grooves 30 are provided. At the center of the bottom of each groove 30, an air jet hole 31 is provided. The gas generating element 1 is hermetically wrapped in the sealing package 2. The upper half of the sealing package 2 is hermetically wrapped and installed below the top opening and above the bottom of the groove 30. The lower half of the sealing package 2 is sleeved in the arc extinguishing cylinder 9. The arc extinguishing cylinder 9 is used to support the sealing package 2 and provide a supporting force when the lower half of the sealing package 2 can extend downward from the air jet hole 31 into the top barrel opening of the arc extinguishing cylinder 9 for sealed communication, so that the lower half of the sealing package 2 and the top opening of the arc extinguishing cylinder 9 form a sealed state. When the gas generating element 1 is triggered one by one in the groove 30 on the turntable 3 to generate a strong air flow, the generated strong air flow is ejected under sealed conditions to achieve the arc extinguishing operation. Thus, the gas generating element 1 is hermetically wrapped on a rotatable turntable 3. When the gas generating element 1 is triggered one by one in the groove 30 on the turntable 3 to generate a strong air flow, the turntable 3 rotates one grid and the lower end opening of the sealing package 2 is inserted into the top opening of the arc extinguishing cylinder 9 again for communication and forms a sealed state. When the gas generating element 1 is triggered in the sealing package 2 to generate a strong air flow, the arc extinguishing cylinder 9 is used to support the sealing package 2 and provide an elastic force for supporting the lower half of the sealing package 2 to be hermetically communicated with the air jet hole 11 when it can slide up and down relatively. The strong air flow ejected from the air jet hole 31 causes the lower half of the sealing package 2 and the top barrel opening of the arc extinguishing cylinder 9 to slide relatively and separate under the action of the elastic force. When the elastic force disappears, the lower end opening of the sealing package 2 extends downward from the air jet hole 31 into the top barrel opening of the arc extinguishing cylinder 9 again for communication and sealing, and the lower end opening of the sealing package 2 and the top opening of the arc extinguishing cylinder 9 form a sealed state. Thus, the gas generating element 1 is hermetically wrapped on a rotatable turntable 3. When the gas generating element 1 is triggered one by one in the groove 30 on the turntable 3 to generate a strong air flow, the generated strong air flow is ejected under sealed conditions to achieve the arc extinguishing operation.

[0022] In the present invention, as Figure 1 and Figure 2As shown in the figure, a bottom plate 4 and a clamping plate 5 are respectively arranged on the upper and lower disk surfaces of the turntable 3. The sealing package 2 is respectively sealed in a groove 30 arranged on the turntable 3 through the bottom plate 4 and the clamping plate 5. The sealing package 2 has a sealed package cavity part 20, a shoulder part 21 extending from the lower end of the sealed package cavity part 20, and a neck part 22 extending downward from the shoulder part 21 and gradually decreasing. The gas generating element 1 is hermetically arranged in the sealed package cavity part 20. Between the top opening and the bottom end of the groove 30, the sealed package cavity part 20 is sealed in the groove 30 through the bottom plate 4 and the clamping plate 5. The shoulder part 21 is clamped and fixed at the bottom end of the groove 30 through the clamping plate 5. When the gas generating element 1 is triggered to generate a strong air flow in the sealing package 2, the neck part 22 of the sealing package 2 sequentially passes through the gas spraying hole 31 and the clamping plate 5 from top to bottom and is inserted into the top barrel opening of the arc extinguishing cylinder 9 for sealed connection; a rigid support shell 6 is arranged above the top barrel opening of the arc extinguishing cylinder 9. When the gas generating element 1 is triggered to generate a strong air flow in the sealing package 2, the neck part 22 of the sealing package 2 is inserted into the top barrel opening of the arc extinguishing cylinder 9 through the support shell 6 for sealed connection; the upper end surface of the support shell 6 is a smooth surface, the center of the upper end surface of the support shell 6 has an upper opening part, and the lower end surface of the support shell 6 has a flared lower opening part. When the gas generating element 1 is triggered to generate a strong air flow in the sealing package 2, the neck part 22 of the sealing package 2 is inserted into the upper opening part of the support shell 6, and the lower opening of the support shell 6 is hermetically connected to the top barrel opening of the arc extinguishing cylinder 9, so that the neck part 22 of the sealing package 2 is inserted into the top barrel opening of the arc extinguishing cylinder 9 through the support shell 6 for sealed connection; a spring 8 is arranged on the edge of the top barrel opening of the arc extinguishing cylinder 9. The spring 8 is sleeved on the outer wall of the lower opening part of the support shell 6. The lower end of the spring 8 is connected to the outer side of the edge of the top barrel opening of the arc extinguishing cylinder 9, and the upper end of the spring 8 is connected to the outer wall of the lower surface of the support shell 6. When the gas generating element 1 is triggered to generate a strong air flow in the sealing package 2, the support shell on the top barrel opening of the arc extinguishing cylinder 9 can move up and down (slide) under the action of the spring 8.

[0023] A U-shaped sealing ring 7 is also provided inside the support housing 6. The U-shaped sealing ring 7 is nested on the inner wall of the upper opening of the support housing 6, so that the neck 2 and the support housing 6 are in contact through the U-shaped sealing ring 7 to play a sealing role. When the gas generating element 1 is triggered to generate a strong air flow in the sealing package 2, when the neck 22 of the sealing package 2 is inserted into the upper opening of the support housing 6, the outer wall of the mouth of the neck 22 contacts and seals with the U-shaped sealing ring 7; The gas generating element 1 is composed of a trigger electrode 10, a gas pellet 11, and a frame 12 tightly wrapped around the outside of the gas pellet. The bottom end of the frame 12 has a jet port 13, and the jet port 13 is on the same vertical axis as the outlet of the neck 22. The trigger electrode 10 passes through the frame 12 and the outside of the sealing cavity 20 upward from the gas pellet and is electrically connected to the bottom plate 4; One or more trigger electrodes are led upward in the gas pellet 11; The length of the neck 22 is between 1 cm and 4 cm, ensuring that when the spring 8 is compressed under the action of the air flow, there is enough separation time between the neck 22 and the support housing 6, so that when the turntable rotates, it can re-enter the next sealing contact. The diameter of the smallest part of the neck 22 does not exceed 1 cm, and the diameter of the largest part of the neck 22 does not exceed 2 cm, thus ensuring the flow rate and pressure of the gas when it is ejected, so that the gas has enough impact force to act on the support housing 6 and compress the spring 8. The gas pellet 11 in the gas generating element 1 is wrapped by the frame 12 on all four sides, and gas may still leak from the gaps that are not wrapped on both sides. Therefore, an integrated sealing package 2 is added outside the gas generating unit frame. The sealing package 2 is stuck in the groove 30 provided on the turntable 3 and is stuck by the bottom plate 4 and the clamping plate 5 of the turntable. The diameter of the lower air outlet (neck 22) of the sealing package 2 decreases downward, similar to a sharp mouth shape. A U-shaped sealing ring 7 is provided above the cylindrical arc extinguishing cylinder 9, and a rigid support housing 6 is provided outside. The lower end surface of the support housing 5 has a flared lower opening. The neck 22 is inserted into the upper opening of the support housing 6 and is in contact and sealed through the U-shaped sealing ring 7 at the top barrel opening of the arc extinguishing cylinder 9. The gas outlet at the bottom of the support housing 6 is flared and the diameter decreases downward. The bottom end of the support housing 6 is embedded in the arc extinguishing cylinder 9. The support housing 6 and the arc extinguishing cylinder are connected by a spring 8. When the gas generating element 1 is triggered to generate a large amount of high-strength gas, a large amount of high-strength gas ejected from the jet port 13 of the sealing package 2 passes through the U-shaped sealing ring 7. The sealing ring bulges around at high temperature and blocks the gap between the sealing package 2 and the support housing 6, so that most of the gas enters the arc extinguishing cylinder 9. The spring 8 at the connection will be compressed under the action of the air flow, so that the support housing 6 on the top barrel opening of the arc extinguishing cylinder 9 can move up and down (slide) under the action of the spring 8 and can return to its original state after the air flow disappears. During the time from when a large amount of high-strength gas is generated to when the air flow disappears, the elastic force of the spring 8 disappears, and the turntable 3 rotates one grid according to the specified action, and the sealing package 2 in each groove 30 can be clamped in turn.When the gas generating element 1 is triggered, the specific way of the turntable rotation can refer to the patent with the application number 201610747255.3 and the patent name: Lightning-induced solid-phase arc extinguishing lightning arrester. By adopting the technical solution of rotary positioning of this patent, it not only ensures reliable rotation and reliable customization, but also ensures reliable dragging after triggering to prevent the turntable from rotating accidentally. Therefore, when the gas generating element 1 on the turntable 3 is triggered, the jet airflow will not leak at the connection between the turntable and the arc extinguishing cylinder, and the jet airflow can act on the arc extinguishing cylinder maximally, so that the neck 22 of the sealing package 2 and the rigid support housing 6 are sealed under the action of the spring 8 and the U-shaped sealing ring 7 respectively.

[0024] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An integrated sealing component based on lightning protection and arc extinction, characterized in that: The sealing assembly includes a gas generating element (1), a sealing package (2), a turntable (3), and an arc extinguishing cylinder (9). A number of evenly distributed grooves (30) are provided on the surface of the turntable (3) along the circumferential direction. An air injection hole (31) is provided at the center of the bottom of each groove (30). The gas generating element (1) is hermetically wrapped in the sealing package (2). The upper half of the sealing package (2) is hermetically wrapped and installed below the top opening and above the bottom of the groove (30). The lower half of the sealing package (2) is sleeved in the arc extinguishing cylinder (9). The arc extinguishing cylinder (9) is used to support the sealing package (2) and provide a supporting force for the lower half of the sealing package (2) to extend downward from the air injection hole (31) into the top barrel opening of the arc extinguishing cylinder (9) for sealed communication, so that the lower half of the sealing package (2) and the top opening of the arc extinguishing cylinder (9) form a sealed state. A bottom plate (4) and a clamping plate (5) are respectively provided on the upper and lower surfaces of the turntable (3). The sealing package (2) is respectively sealed in the groove (30) provided on the turntable (3) through the bottom plate (4) and the clamping plate (5). The sealing package (2) has a sealed cavity part (20), a shoulder part (21) extending from the lower end of the sealed cavity part (20), and a neck part (22) extending downward from the shoulder part (21) and gradually decreasing. The gas generating element (1) is hermetically arranged in the sealed cavity part (20). The sealed cavity part (20) is sealed in the groove (30) through the bottom plate (4) and the clamping plate (5) between the top opening and the bottom end of the groove (30). The shoulder part (21) is clamped and fixed at the bottom end of the groove (30) through the clamping plate (5). When the gas generating element (1) is triggered to generate strong air flow in the sealing package (2), the neck part (22) of the sealing package (2) sequentially passes through the air injection hole (31) and the clamping plate (5) from top to bottom and inserts into the top barrel opening of the arc extinguishing cylinder (9) for sealed communication. A rigid support housing (6) is provided above the top barrel opening of the arc extinguishing cylinder (9). When the gas generating element (1) is triggered to generate strong air flow in the sealing package (2), the neck part (22) of the sealing package (2) is inserted into the top barrel opening of the arc extinguishing cylinder (9) through the support housing (6) for sealed communication. The upper surface of the support housing (6) is a smooth surface. The center of the upper surface of the support housing (6) has an upper opening. The lower surface of the support housing (6) has a flared lower opening. The gas outlet at the bottom of the support housing (6) is flared and the diameter decreases downward. When the gas generating element (1) is triggered to generate strong air flow in the sealing package (2), the neck part (22) of the sealing package (2) is inserted into the upper opening of the support housing (6). The lower opening of the support housing (6) is in sealed communication with the top barrel opening of the arc extinguishing cylinder (9), so that the neck part (22) of the sealing package (2) is inserted into the top barrel opening of the arc extinguishing cylinder (9) through the support housing (6) for sealed communication.

2. The integrated sealing component based on lightning protection and arc extinction according to claim 1, characterized in that: A spring (8) is provided on the edge of the top opening of the arc extinguishing cylinder (9). The spring (8) is sleeved on the outer wall of the lower opening of the support housing (6). The lower end of the spring (8) is connected to the outer side of the edge of the top opening of the arc extinguishing cylinder (9), and the upper end of the spring (8) is connected to the outer wall of the lower surface of the support housing (6).

3. The integrated sealing component based on lightning protection and arc extinction according to claim 1 or 2, characterized in that: A U-shaped sealing ring (7) is also provided in the support housing (6). The U-shaped sealing ring (7) is nested on the inner wall of the upper opening of the support housing (6). When the gas generating element (1) is triggered to generate strong airflow in the sealing package (2), when the neck (22) of the sealing package (2) is inserted into the upper opening of the support housing (6), the outer wall of the mouth of the neck (22) is in contact with the U-shaped sealing ring (7) for sealing.

4. An integrated sealing component based on lightning protection and arc extinction according to claim 1, characterized in that: The gas generating element (1) is composed of a trigger electrode (10), a gas pellet (11), and a frame (12) tightly surrounding the outside of the gas pellet. The bottom end of the frame (12) has a jet port (13), and the jet port (13) and the outlet of the neck (22) are on the same vertical axis. The trigger electrode (10) passes through the frame (12) and the outside of the sealing cavity (20) upward from inside the gas pellet and is electrically connected to the bottom plate (4).

5. The integrated sealing component based on lightning protection and arc extinguishing according to claim 4, characterized in that: One or more trigger electrodes are led upward in the gas pellet (11).

6. The integrated sealing component based on lightning protection and arc extinguishing according to claim 1, wherein: The length of the neck (22) is between 1 cm and 4 cm. The diameter of the smallest part of the neck (22) does not exceed 1 cm, and the diameter of the largest part of the neck (22) does not exceed 2 cm.

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