Outdoor high-voltage isolating switch

Abstract

The invention discloses an outdoor high-voltage isolating switch, which comprises a bottom frame, an operating mechanism, an insulator, a base I, a base II, a static contact arranged on the base I and a knife switch rotationally connected with the base II, and is characterized in that the base I is provided with a baffle plate I and a baffle plate II; the static contact is arranged between the baffle plate I and the baffle plate II, a protective cover covers the knife switch, and the protective cover comprises a protective cover arranged on one side, far away from the base II, of the knife switch; when the moving contact is in contact with the static contact, the face, facing the first base, of the protection cover abuts against the first baffle and the second baffle at the same time, and when the switch is in a closed state, the protection cover, the first baffle and the second baffle can prevent rain and snow from making contact with the moving contact and the static contact, and meanwhile certain dustproof and bird droppings prevention effects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to an outdoor high-voltage isolating switch. Background Art

[0002] High-voltage disconnectors are important electrical appliances in power plants, substations and various electrical supply and consumption systems. They are used to switch live high-voltage lines and isolate live high-voltage lines from electrical equipment such as high-voltage busbars or circuit breakers under maintenance, ensuring the safety of high-voltage electrical appliances and devices during maintenance work, and isolating voltages. They are widely used in various power supply and consumption systems in the national economy, such as electricity, railways, mines, and oil fields.

[0003] The vertical opening disconnector is a common type of high-voltage disconnector. As shown in the utility model patent with application number 202322722037.2, it usually includes a chassis, an operating mechanism, an insulator, a static contact and a knife, and the knife includes a moving contact. The vertical opening disconnector is usually set outdoors without corresponding protective measures. The knife and static contact are easily attached to rain, snow, dust, bird droppings and other substances, which can easily cause damage to the knife and static contact, resulting in reduced performance and service life of the high-voltage disconnector.

[0004] In response to the above defects, a box-type protective cover that covers the entire high-voltage disconnector has appeared on the market. However, the box-type protective cover is large in size and has a certain impact on the heat dissipation of the disconnector. The vertical opening disconnector is usually set at a higher place. For the disconnector with a box-type protective cover, the operator is either required to climb to a high place to open the box-type protective cover for operation, which is not only cumbersome to operate but also dangerous; or remote operation is performed through an operating mechanism, but remote operation is not convenient for the operator to observe whether the closing is completed. With the use of the disconnector, the probability of failure to close smoothly or looseness during the closing process will also increase. Because of the existence of the box-type protective cover, the operator cannot confirm whether the closing is successful and cannot avoid accidents in time. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an outdoor high-voltage isolating switch for protecting a knife switch and a static contact.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an outdoor high-voltage disconnector, including a base, an operating mechanism, an insulator, a base one, a base two, a static contact arranged on the base one and a knife switch rotatably connected to the base two, the knife switch including a moving contact, characterized in that: a baffle one and a baffle two are provided on the base one, the static contact is arranged between the baffle one and the baffle two, a protective cover is provided on the knife switch upper cover, and the protective cover includes a protective cover arranged on the side of the knife switch away from the base two; when the moving contact contacts the static contact, the surface of the protective cover facing the base one abuts against the baffle one and the baffle two at the same time.

[0007] By adopting the above scheme, when the present invention is in the closed state, the protective cover, baffle 1 and baffle 2 can prevent rain and snow from contacting the moving contact and the static contact, and at the same time play a certain role in preventing dust and bird droppings.

[0008] Compared with the prior art, the protective cover of the present invention is compact and simple in structure, ensuring that the contact part between the static contact and the moving contact is not corroded, and ensuring the performance of the present invention. The protective cover can be directly fixed on the switch blade by screws; it can also be directly covered on the switch blade, in which case a fixing rod with a thread at one end is passed through the gap of the switch blade, and the two ends of the fixing rod are passed through the opposite two end surfaces of the protective cover, one end of the fixing rod is provided with an enlarged end, and the other end with a thread is provided with a nut, which is clamped and fixed by the enlarged end and the nut.

[0009] As a further configuration of the present invention, the surfaces opposite to each other of block one and block two and the surfaces of block one and block two facing base two are provided with indication patterns, and the outer edge of the protective cover is provided with a shielding portion; when the moving contact and the static contact are in contact, the shielding portion covers the indication pattern.

[0010] With the above solution, the operator can judge whether the closing procedure is completed by checking whether the shielding part covers the indicator pattern, which is convenient for the operator to find problems in time for maintenance. The indicator pattern can be a conspicuous solid color pattern, such as red.

[0011] As a further configuration of the present invention, a rotating shaft extending toward the base two is provided on the base one, the rotating shaft is arranged on the side of the baffle one away from the baffle two, a rotating sleeve is provided on the rotating shaft, a limiting structure for preventing the rotating sleeve from separating from the rotating shaft is provided on the rotating shaft, a cover plate and a guide plate are provided on the rotating sleeve, the cover plate and the guide plate are bent and / or folded in the same direction, an extension portion is provided on the protective cover, the extension portion includes a guide block extending in a direction close to the base one, the guide block is located on the side of the rotating shaft away from the baffle one, the guide block is located on the side of the protective cover close to the base frame, and the base one includes a limiting portion; when the moving contact contacts the static contact, the guide block abuts against the surface of the guide plate facing the cover plate, and the surface of the guide plate facing away from the cover plate forms a limit with the limiting portion.

[0012] By adopting the above scheme, when the present invention is in the open state, the cover plate is set on the static contact, and the cover plate is in contact with baffle plate 1 and baffle plate 2 at the same time to prevent rain and snow from contacting the static contact, and at the same time plays a certain role in dust prevention and bird droppings prevention. When it is necessary to close the switch, the knife rotates under the action of the operating mechanism. During the rotation process, the guide block first contacts the guide plate. As the knife rotates, the guide block applies force to the guide plate, driving the rotating sleeve to rotate, and the rotating sleeve drives the cover plate to rotate, so that the cover plate is separated from baffle plate 1 and baffle plate 2. During the closing process, there is always a gap between the cover plate and the moving contact. As the knife rotates, the moving contact approaches the static contact until the moving contact and the static contact are in contact. The surface of the protective cover facing the base one is in contact with baffle plate 1 and baffle plate 2 at the same time. At this time, the center of gravity of the cover plate is located on the side of the rotating shaft away from baffle plate 1. When the switch needs to be opened, the knife rotates under the action of the operating mechanism. As the knife rotates, the guide block abuts against the surface of the cover plate facing the guide plate and applies force, causing the cover plate to rotate in the direction close to baffle one until the center of gravity of the cover plate moves to the side of the rotating shaft close to baffle one, and the cover plate automatically re-covers the static contact under the action of gravity.

[0013] For areas with strong winds, during the opening and closing process of the present invention, the center of gravity of the cover plate is always located on the side of the rotating shaft close to the baffle plate, so that the cover plate can automatically return to the covered state after being blown by the wind in the opening state of the present invention. In this design, the rotation angle of the cover plate is controlled by the force applied by the guide block to the guide plate, and the guide block does not contact the cover plate during the opening process.

[0014] The invention has a simple structure and does not require the participation of a motor. It can not only be designed on a new high-voltage isolating switch, but also only requires a slight modification of an old high-voltage isolating switch to achieve the same protection effect.

[0015] As a further configuration of the present invention, the curvature of the cover plate gradually decreases from the middle of the cover plate to the side of the cover plate close to the rotation axis and to the side of the cover plate away from the rotation axis.

[0016] By adopting the above solution, the cover plate can be better covered on the static contact.

[0017] As a further configuration of the present invention, when the moving contact and the stationary contact are in contact, the distance from the cover plate to the base frame gradually decreases from the side of the cover plate away from the rotating sleeve to the side of the cover plate close to the rotating sleeve.

[0018] The above solution is adopted to prevent rain and snow from accumulating on the cover plate when closing the switch.

[0019] As a further configuration of the present invention, the surface where the guide block contacts the guide plate is an arc-shaped surface.

[0020] The above solution enables the guide block to move more smoothly on the guide plate. If the guide block is designed to contact the cover plate, the contact surface between the guide block and the cover plate is also an arc surface.

[0021] As a further configuration of the present invention, a bending end is provided on a side of the guide plate away from the rotating shaft, and when the moving contact abuts against the static contact, the guide block and the bending end form a limit.

[0022] The above solution is adopted to prevent the guide block from being separated from the guide plate and prevent the rotating sleeve from rotating automatically.

[0023] As a further configuration of the present invention, the limiting structure includes a fixing bolt arranged on the side of the rotating shaft facing the base two, the fixing bolt includes a screw head and a screw rod, and a thread groove for the screw rod to penetrate and threadably engage is provided on the surface of the rotating shaft facing the base two, and the diameter of the screw head is larger than the inner diameter of the rotating sleeve.

[0024] The above solution makes it easy to install the rotating sleeve on the rotating shaft or remove it from the rotating shaft.

[0025] As a further configuration of the present invention, at least two bearings are provided between the rotating sleeve and the rotating shaft.

[0026] By adopting the above solution, the bearing is preferably a thin-walled bearing to make the rotating sleeve rotate more smoothly.

[0027] As a further configuration of the present invention, the opposing surfaces of baffle plate 1 and baffle plate 2 are both inclined, and the distance between baffle plate 1 and baffle plate 2 gradually decreases from the side away from the base frame to the side close to the base frame.

[0028] By adopting the above scheme, baffle plate 1 and baffle plate 2 can not only play a protective role, but also play a certain corrective role. After multiple openings and closings, the knife switch may become loose, resulting in a small amount of horizontal deviation of the knife switch during the closing process, so that the moving contact cannot accurately contact the static contact, affecting the normal use of the present invention. The opposing surfaces of baffle plate 1 and baffle plate 2 play a certain guiding role and can correct the small amount of horizontal deviation of the moving contact.

[0029] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 It is an overall schematic diagram of a specific embodiment of the present invention;

[0031] Attached Figure 2 For attachment Figure 1 A magnified view of part A;

[0032] Attached Figure 3 A top view of a specific embodiment of the present invention;

[0033] Attached Figure 4 For attachment Figure 3 BB cross-sectional view;

[0034] Attached Figure 5 This is a cross-sectional view of the cover plate in the open state of a specific embodiment of the present invention;

[0035] Attached Figure 6 It is a schematic diagram of a protective cover according to a specific embodiment of the present invention;

[0036] Attached Figure 7 It is a schematic diagram of a base according to a specific embodiment of the present invention;

[0037] Attached Figure 8 It is a cross-sectional view of the rotating shaft matching according to a specific embodiment of the present invention.

[0038] Base frame 1, operating mechanism 2, insulator 3, base 1 4, baffle 1 41, baffle 2 42, rotating shaft 43, threaded groove 431, fixing bolt 44, screw head 441, screw rod 442, limiting portion 45, bearing 46, base 2 5, static contact 6, knife switch 7, moving contact 71, protective cover 8, protective cover 81, shielding portion 811, extension portion 82, guide block 83, rotating sleeve 9, cover plate 91, guide plate 92, bent end 921, indication pattern 10. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. used in the description to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] The specific implementation example of the present invention is Figure 1-8 shown.

[0042] An outdoor high-voltage disconnector comprises a chassis 1, an operating mechanism 2, an insulator 3, a base 1 4, a base 2 5, a static contact 6 arranged on the base 1 4 and a knife switch 7 rotatably connected to the base 2 5, the knife switch 7 comprising a moving contact 71, a baffle 1 41 and a baffle 2 42 are arranged on the base 1 4, the static contact 6 is arranged between the baffle 1 41 and the baffle 2 42, a protective cover 8 is provided on the knife switch 7, and the protective cover 8 comprises a protective cover 81 arranged on the side of the knife switch 7 away from the base 2 5; when the moving contact 71 contacts the static contact 6, the surface of the protective cover 81 facing the base 1 4 abuts against the baffle 1 41 and the baffle 2 42 at the same time.

[0043] The base 1 4 is provided with a rotating shaft 43 extending toward the base 2 5. The rotating shaft 43 is arranged on the side of the baffle 1 41 away from the baffle 2 42. A rotating sleeve 9 is sleeved on the rotating shaft 43. A fixing bolt 44 is provided on the side of the rotating shaft 43 facing the base 2 5. The fixing bolt 44 includes a screw head 441 and a screw rod 442. A thread groove 431 for the screw rod 442 to penetrate and threadedly engage is provided on the surface of the rotating shaft 43 facing the base 2 5. The diameter of the screw head 441 is larger than the inner diameter of the rotating sleeve 9. The rotating sleeve 9 is provided with a cover plate 91 and a guide plate 92 The cover plate 91 and the guide plate 92 are bent in the same direction, an extension portion 82 is provided on the protective cover 8, the extension portion 82 includes a guide block 83 extending in the direction close to the base 4, the guide block 83 is located on the side of the rotating shaft 43 away from the baffle 41, the guide block 83 is located on the side of the protective cover 8 close to the base 1, and the base 4 includes a limiting portion 45; when the moving contact 71 contacts the static contact 6, the guide block 83 abuts against the surface of the guide plate 92 facing the cover plate 91, and the guide plate 92 and the surface facing away from the cover plate 91 form a limit with the limiting portion 45.

[0044] When the present embodiment is in the open state, the cover plate 91 covers the static contact 6, and the cover plate 91 abuts against the baffle plate 1 41 and the baffle plate 2 42 at the same time, preventing rain and snow from contacting the static contact 6, and playing a certain role in preventing dust and bird droppings. When the switch needs to be closed, the knife 7 rotates under the action of the operating mechanism 2. During the rotation process, the guide block 83 first contacts the guide plate 92. As the knife 7 rotates, the guide block 83 applies force to the guide plate 92, driving the rotating sleeve 9 to rotate, and the rotating sleeve 9 drives the cover plate 91 to rotate, so that the cover plate 91 is separated from the baffle plate 1 41 and the baffle plate 2 42. During the closing process, there is always a gap between the cover plate 91 and the moving contact 71. As the knife 7 rotates, the moving contact 71 approaches the static contact 6 until the moving contact 71 and the static contact 6 are in contact. The surface of the protective cover 81 facing the base 1 4 abuts against the baffle 1 41 and the baffle 2 42 at the same time. The protective cover 81 prevents rain and snow from contacting the moving contact 71 and the static contact 6, and plays a certain role in preventing dust and bird droppings. At this time, the center of gravity of the cover plate 91 is located on the side of the rotating shaft 43 away from the baffle 1 41. When the switch needs to be opened, the knife 7 rotates under the action of the operating mechanism 2. As the knife 7 rotates, the guide block 83 abuts against the surface of the cover plate 91 facing the guide plate 92 and applies force, so that the cover plate 91 rotates in the direction close to the baffle 1 41 until the center of gravity of the cover plate 91 moves to the side of the rotating shaft 43 close to the baffle 1 41, and the cover plate 91 automatically covers the static contact 6 again under the action of gravity. In this embodiment, the protective cover 81 is a curved plate, and the outer edge of the protective cover 81 away from the second baffle 42 protrudes from the first baffle 41 , and the outer edge of the protective cover 81 away from the first baffle 41 protrudes from the second baffle 42 , which can better perform shielding.

[0045] For areas with strong winds, the center of gravity of the cover plate 91 is different from that of the present embodiment. The center of gravity of the cover plate 91 is always located on the side of the rotating shaft 43 close to the baffle 41 during the opening and closing process, so that the cover plate 91 can automatically return to the covered state after being blown by the wind in the open state. In this design, the rotation angle of the cover plate 91 is controlled by the force applied by the guide block 83 to the guide plate 92, and the guide block 83 does not contact the cover plate 91 during the opening process of the knife 7.

[0046] Compared with the prior art, the protective cover 8 and the cover plate 91 of this embodiment are small in size and simple in structure, ensuring that the contact parts of the static contact 6 and the moving contact 71 are not corroded, thereby ensuring the performance of this embodiment. The protective cover 8 can be directly fixed on the knife 7 by screws; it can also be directly covered on the knife 7, in which case a fixing rod with a thread at one end is passed through the gap of the knife 7, and the two ends of the fixing rod are passed through the opposite two end surfaces of the protective cover 8, one end of the fixing rod is provided with an enlarged end, and the threaded end is provided with a nut, which is clamped and fixed by the enlarged end and the nut. This embodiment has a simple structure and does not require the participation of a motor. It can not only be designed on a new high-voltage disconnector, but also only requires a slight modification of the old high-voltage disconnector to achieve the same protection effect.

[0047] The surfaces of the block 1 and the block 2 facing each other and the surfaces of the block 1 and the block 2 facing the base 2 5 are both provided with an indication pattern 10, and the outer edge of the protective cover 81 is provided with a shielding portion 811. When the moving contact 71 and the static contact 6 are in contact, the shielding portion 811 covers the indication pattern 10. The operator can judge whether the closing procedure is completed by whether the shielding portion 811 covers the indication pattern 10, which is convenient for the operator to find problems in time for maintenance. In this embodiment, the indication pattern 10 is a red background with a yellow reflective strip.

[0048] The curvature of the cover plate 91 gradually decreases from the middle of the cover plate 91 to the side of the cover plate 91 close to the rotating shaft 43 and to the side of the cover plate 91 away from the rotating shaft 43, so that the cover plate 91 can be better covered on the stationary contact 6. For this embodiment, the shape of the cover plate 91 also facilitates the guide block 83 to push the cover plate 91.

[0049] When the moving contact 71 and the stationary contact 6 are in contact, the distance between the cover plate 91 and the base frame 1 gradually decreases from the side of the cover plate 91 away from the rotating sleeve 9 to the side of the cover plate 91 close to the rotating sleeve 9, so as to prevent rain and snow from accumulating on the cover plate 91 when the switch is closed.

[0050] The surface where the guide block 83 contacts the guide plate 92 is an arc-shaped surface, so that the guide block 83 can move more smoothly on the guide plate 92. In this embodiment, the surface where the guide block 83 contacts the cover plate 91 is also an arc-shaped surface.

[0051] A bent end 921 is provided on the side of the guide plate 92 away from the rotating shaft 43. When the moving contact 71 abuts against the stationary contact 6, the guide block 83 and the bent end 921 form a limit, thereby preventing the guide block 83 from detaching from the guide plate 92 and preventing the rotating sleeve 9 from rotating by itself.

[0052] Three bearings 46 are arranged between the rotating sleeve 9 and the rotating shaft 43. The bearings 46 used in this embodiment are thin-walled bearings, which make the rotating sleeve 9 rotate more smoothly.

[0053] The opposing surfaces of baffle plate 1 41 and baffle plate 2 42 are inclined, and the distance between baffle plate 1 41 and baffle plate 2 42 gradually decreases from the side far from the base frame 1 to the side close to the base frame 1. Therefore, baffle plate 1 41 and baffle plate 2 42 can not only play a protective role, but also play a certain corrective role. After multiple openings and closings, the knife switch 7 may become loose, resulting in a small amount of horizontal deviation of the knife switch 7 during the closing process, so that the moving contact 71 cannot accurately contact the static contact 6, affecting the normal use of this embodiment. The opposing surfaces of baffle plate 1 41 and baffle plate 2 42 play a certain guiding role, and can correct the small amount of horizontal deviation of the moving contact 71.

[0054] The present invention is not limited to the above-mentioned specific implementation modes. A person skilled in the art may adopt other various specific implementation modes to implement the present invention based on the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. An outdoor high-voltage disconnector, comprising a chassis, an operating mechanism, an insulator, a base 1, a base 2, a stationary contact arranged on the base 1 and a knife rotatably connected to the base 2, wherein the knife includes a moving contact, and is characterized in that: Baffle plate 1 and baffle plate 2 are provided on the base 1, the static contact is arranged between baffle plate 1 and baffle plate 2, and a protective cover is provided on the upper cover of the switch blade, and the protective cover includes a protective cover arranged on the side of the switch blade away from the base 2; when the moving contact contacts the static contact, the surface of the protective cover facing the base 1 abuts against baffle plate 1 and baffle plate 2 at the same time.

2. An outdoor high-voltage disconnector according to claim 1, characterized in that: The surfaces of the stopper 1 and the stopper 2 facing away from each other and the surfaces of the stopper 1 and the stopper 2 facing the base 2 are both provided with indication patterns, and the outer edge of the protective cover is provided with a shielding portion; when the moving contact and the static contact are in contact, the shielding portion covers the indication pattern.

3. An outdoor high-voltage disconnector according to claim 1 or 2, characterized in that: The base one is provided with a rotating shaft extending toward the base two, the rotating shaft is arranged on the side of the baffle one away from the baffle two, the rotating shaft is sleeved with a rotating sleeve, the rotating shaft is provided with a limiting structure to prevent the rotating sleeve from separating from the rotating shaft, the rotating sleeve is provided with a cover plate and a guide plate, the cover plate and the guide plate are bent and / or folded in the same direction, the protective cover is provided with an extension portion, the extension portion includes a guide block extending in a direction close to the base one, the guide block is located on the side of the rotating shaft away from the baffle one, the guide block is located on the side of the protective cover close to the bottom frame, and the base one includes a limiting portion; when the moving contact contacts the static contact, the guide block abuts against the surface of the guide plate facing the cover plate, and the surface of the guide plate facing away from the cover plate forms a limit with the limiting portion.

4. An outdoor high-voltage disconnector according to claim 3, characterized in that: The curvature of the cover plate gradually decreases from the middle of the cover plate to the side of the cover plate close to the rotating shaft and to the side of the cover plate away from the rotating shaft.

5. An outdoor high-voltage disconnector according to claim 4, characterized in that: When the moving contact and the stationary contact are in contact, the distance between the cover plate and the base frame gradually decreases from the side of the cover plate away from the rotating sleeve to the side of the cover plate close to the rotating sleeve.

6. An outdoor high-voltage disconnector according to claim 5, characterized in that: The surface where the guide block contacts the guide plate is an arc-shaped surface.

7. An outdoor high-voltage disconnector according to claim 6, characterized in that: A bending end is provided on one side of the guide plate away from the rotating shaft, and when the moving contact abuts against the static contact, the guide block and the bending end form a limit.

8. An outdoor high-voltage disconnector according to claim 7, characterized in that: The limiting structure includes a fixing bolt arranged on the side of the rotating shaft facing the second base, the fixing bolt includes a screw head and a screw rod, and a thread groove for the screw rod to penetrate and threadably engage is provided on the surface of the rotating shaft facing the second base, and the diameter of the screw head is larger than the inner diameter of the rotating sleeve.

9. An outdoor high-voltage disconnector according to claim 8, characterized in that: At least two bearings are arranged between the rotating sleeve and the rotating shaft.

10. An outdoor high-voltage disconnector according to claim 6, 7, 8 or 9, characterized in that: The opposing surfaces of the baffle plate 1 and the baffle plate 2 are both inclined, and the distance between the baffle plate 1 and the baffle plate 2 gradually decreases from the side far from the bottom frame to the side close to the bottom frame.

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