A sealed pole for load switch

Abstract

The present invention relates to the technical field of power distribution switch equipment, and specifically provides a sealed pole for a load switch, including a pole body, a moving end contact arm and a static end contact arm are connected to the pole body, and an arc extinguishing chamber is opened inside the pole body, a moving end contact and a static end contact are arranged in the arc extinguishing chamber, and the two are respectively connected to the moving end contact arm and the static end contact arm, and an adjusting component is also arranged in the arc extinguishing chamber, and the adjusting component can adjust the moving end contact. The moving end contact is adjusted multiple times by the adjusting component, so that the contact between the moving end contact and the static end contact is closer, thereby increasing the contact area between the moving end contact and the static end contact, ensuring that the contact surface between the moving end contact and the static end contact is maximized, thereby avoiding the phenomenon that the contact resistance value increases due to the reduction of the contact area, and reducing the impact on the current conduction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution switch equipment, and in particular to a sealed pole for a load switch. Background Art

[0002] The solid-sealed pole refers to the circuit breaker's vacuum interrupter, conductive parts and supporting insulation structure are integrated into a high-performance insulating material (usually epoxy resin) to form an integral solid-encapsulated pole. This technology is mainly used in medium and high voltage vacuum circuit breakers and is widely used in power distribution systems, especially in harsh environmental conditions, with excellent insulation performance and durability.

[0003] For example, Chinese patent CN211788804U discloses a sealed pole of a vacuum circuit breaker, including a sealed pole body, a fixing seat is installed at the bottom of the sealed pole body, a moving conductive rod is installed at the upper end of the sealed pole body, a bellows is arranged on the surface of the sealed pole body, a bellows shielding cover is wrapped on the outside of the bellows, a guide sleeve is installed at the lower end of the bellows, a static cover is installed at the lower end of the guide sleeve, the static cover is connected to the circuit breaker through the static conductive rod, a shielding cylinder is installed below the bellows shielding cover, a vacuum arc extinguishing chamber is arranged inside the shielding cylinder, the circuit breaker is connected to the contact arm through contacts, and good shielding insulation effect and stable docking are achieved by arranging the bellows shielding cover and the guide sleeve.

[0004] However, when the contacts of the circuit breaker in the above scheme are used for a long time, the high temperature of the arc will cause local melting and ablation of the contact surface, especially under high load conditions. This arc ablation will not only cause the surface to be uneven, but also form pits locally, thereby reducing the actual contact area and increasing the resistance of the electric shock, thereby affecting the current conduction efficiency, increasing the heat problem, and even further accelerating the wear of the contacts. Summary of the invention

[0005] Based on this, it is necessary to provide a sealed pole for a load switch to address the problem that the current conduction efficiency is affected by the reduced contact area of ​​the current contacts.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A sealed pole for a load switch, comprising:

[0008] A pole body, wherein a static contact arm and a moving contact arm are connected to the outside of the pole body, an arc extinguishing chamber is provided inside the pole body, and a static contact and a moving contact are arranged in the arc extinguishing chamber;

[0009] An insulating pull rod, which can drive the movable end contact to contact with or away from the static end contact;

[0010] An adjustment component, wherein the adjustment component is configured as follows:

[0011] When the movable end contact approaches the static end contact, the adjusting component drives the movable end contact to rotate by a preset angle and then stops rotating;

[0012] When the movable end contact is away from the static end contact, the adjusting assembly restricts the movable end contact from rotating relative to the static end contact;

[0013] A scale, the scale being connected to the moving end contact, the scale being capable of recording the distance moved by the moving end contact each time when the moving end contact contacts the static end contact, and the moving end contact contacts the static end contact at the position where the moving distance is the farthest after rotating one circle;

[0014] The adjusting assembly comprises an adjusting sleeve and an adjusting rod, wherein the adjusting sleeve is fixedly connected to the movable end contact, and a plurality of first slide grooves and second slide grooves are provided on the outer side wall of the adjusting sleeve, wherein the first slide grooves extend along the axial direction of the adjusting sleeve and are evenly distributed along the radial direction of the adjusting sleeve, and the second slide grooves are spiral grooves and the two ends of the second slide grooves are respectively connected to the upper end and the lower end of two adjacent first slide grooves, and one end of the adjusting rod is fixedly arranged in the arc extinguishing chamber, and the other end of the adjusting rod is located in the first slide groove or the second slide groove;

[0015] When the movable end contact moves toward the static end contact, the adjusting rod enters the second sliding groove, and the adjusting sleeve drives the movable end contact to rotate by a preset angle;

[0016] When the movable end contact moves in a direction away from the static end contact, the adjusting rod is located in the first sliding groove, and the first sliding groove limits the rotation of the adjusting sleeve.

[0017] Furthermore, a steering assembly is provided on one end of the adjusting rod located in the first slide groove or the second slide groove. When the adjusting rod is located at the upper end of the first slide groove and the adjusting sleeve moves upward, the steering assembly can turn the adjusting rod from the first slide groove to the second slide groove.

[0018] Furthermore, the steering assembly includes a steering wheel, a first paddle and a second paddle, the surface of the steering wheel is vertically and fixedly connected to one end of the adjusting rod located in the first slide groove or the second slide groove, the first paddle and the second paddle are both slidably arranged on the side wall of the steering wheel, the first paddle can slide along the extension direction of the first slide groove, and the second paddle can slide along the extension direction of the second slide groove, an elastic member is connected between one end of the first paddle and the second paddle located in the steering wheel, and when the steering wheel is located at the upper end of the first slide groove, the first paddle is compressed and pushes the second paddle into the second slide groove to guide the adjusting rod into the second slide groove.

[0019] Furthermore, the adjusting rod can be extended and retracted, and a third sliding groove is opened at the bottom of the first sliding groove. The extension direction and size of the third sliding groove are the same as those of the first sliding groove. When the adjusting rod is extended, it can extend into the third sliding groove. After the adjusting rod enters the third sliding groove, it limits the second paddle from extending into the second sliding groove.

[0020] Furthermore, a switch assembly is provided in the arc extinguishing chamber, and the switch assembly can control the extension and shortening of the adjusting rod, and the switch assembly is configured as follows:

[0021] When the movable end contact is adjusted to rotate, the switch assembly pushes the adjusting rod to shorten, and the adjusting rod can be located in the first sliding groove or the second sliding groove;

[0022] After the movable end contact is adjusted, the switch assembly pushes the adjusting rod to extend, and the adjusting rod can be located in the third sliding groove.

[0023] Furthermore, the switch assembly includes a limiting rod and a compression spring, wherein the compression spring is located inside the adjusting rod, and the compression spring makes the adjusting rod tend to extend. A wedge block is provided on the outer peripheral wall of the adjusting rod, and the limiting rod is slidably provided in the arc extinguishing chamber. One end of the limiting rod abuts against the wedge block, and the limiting rod can push the wedge block when moving toward the adjusting rod, and the wedge block drives the adjusting rod to shorten. When the limiting rod moves away from the adjusting rod, the compression spring pushes the adjusting rod to extend.

[0024] Furthermore, a dynamic conductive column is fixedly connected to the bottom of the moving end contact, and the dynamic conductive column is electrically connected to the moving end contact arm. The dynamic conductive column has two upper and lower parts, and a rotating component is arranged between the two parts. The rotating component rotatably connects the two parts, and the upper and lower parts of the dynamic conductive column can rotate relative to each other.

[0025] Furthermore, the rotating assembly includes a first rotating disk, a second rotating disk and a clamp, the first rotating disk and the second rotating disk are respectively fixed to the upper and lower parts of the moving conductive column, the first rotating disk and the second rotating disk are coaxial and rotated in contact with each other, and the clamp is clamped on two end surfaces of the first rotating disk and the second rotating disk that are away from each other to limit the first rotating disk and the second rotating disk from disengaging.

[0026] Furthermore, a first shielding cover is fixedly provided on the outer periphery of the upper part of the dynamic conductive column, a static conductive column is provided on the static end contact, and a second shielding cover is fixedly provided on the outer periphery of the static conductive column.

[0027] The beneficial effects of the present invention are:

[0028] The present invention arranges an adjustment component in the arc extinguishing chamber, and adjusts the moving end contact multiple times through the adjustment component, so that the contact between the moving end contact and the static end contact is tighter, thereby increasing the contact area between the moving end contact and the static end contact, ensuring that the contact surface between the moving end contact and the static end contact is maximized, thereby avoiding the phenomenon that the contact area is reduced and the contact resistance value increases, and reducing the impact on the current conduction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a sealed pole for a load switch provided by an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the internal structure of an arc extinguishing chamber of a sealed pole for a load switch provided in one embodiment of the present invention;

[0031] Figure 3 for Figure 2 A front view of a sealed pole for a load switch provided in an embodiment;

[0032] Figure 4 for Figure 3 A partial enlarged view of the X portion of the sealed pole for a load switch provided in an embodiment;

[0033] Figure 5 for Figure 3 A partial enlarged view of a cutaway portion X of a sealed pole for a load switch provided in an embodiment;

[0034] Figure 6 for Figure 3 A cross-sectional view of a steering wheel of a sealed pole for a load switch provided in an embodiment along AA;

[0035] Figure 7 A schematic structural diagram of an adjustment sleeve and an adjustment rod of a sealed pole for a load switch provided by an embodiment of the present invention;

[0036] Figure 8 for Figure 7 A cross-sectional view of an adjustment sleeve and an adjustment rod of a sealed pole for a load switch provided in an embodiment;

[0037] Fig. 9 for Figure 8 A partial enlarged view of the Y portion of the sealed pole for a load switch provided in one embodiment.

[0038] in:

[0039] 100, pole body; 110, moving end contact arm; 120, static end contact arm; 130, plum blossom contact; 140, insulating pull rod;

[0040] 200, arc extinguishing chamber; 210, moving end contact; 220, moving conductive column; 221, first rotating disk; 222, second rotating disk; 223, clamp; 224, first shielding cover; 225, large bellows; 226, scale; 230, static end contact; 240, static conductive column; 241, second shielding cover;

[0041] 300, adjusting sleeve; 301, first slide slot; 302, second slide slot; 303, third slide slot; 310, adjusting rod; 311, fixing rod; 312, steering wheel; 313, first paddle; 314, second paddle; 315, elastic member; 316, wedge block;

[0042] 400, limiting rod; 401, small bellows; 410, compression spring; 420, adjusting handle; 421, arc ball. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which 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 to the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] Refer to the following Figure 1-Figure 9To describe a sealed pole for a load switch provided by the present invention.

[0047] A sealed pole for a load switch, suitable for a high-voltage vacuum circuit breaker, comprises a pole body 100, a static contact arm 120 and a moving contact arm 110 are connected to the outside of the pole body 100, a plum blossom contact 130 is connected to the static contact arm 120 and the moving contact arm 110, the plum blossom contact 130 is used to connect the circuit, an arc extinguishing chamber 200 is arranged inside the pole body 100, the arc extinguishing chamber 200 is in a vacuum state, a static contact 230 is arranged at the upper end of the arc extinguishing chamber 200, the static contact 230 is softly connected to the static contact arm 120 through a wire, a moving contact 210 is slidably arranged at the lower end of the arc extinguishing chamber 200, and the moving contact 210 is also softly connected to the moving contact 210 through a wire, and the pole body is provided with a fixed pole. An insulating pull rod 140 is also provided on the body 100. The insulating pull rod 140 can quickly push or pull the moving end contact 210 to move toward or away from the static end contact 230. When the moving end contact 210 is in contact with the static end contact 230, the entire circuit is connected. When the moving end contact 210 is away from the static end contact 230, due to the action of the arc extinguishing chamber 200, the arc causes the metal vapor and ionized gas between the moving end contact 210 and the static end contact 230 to diffuse rapidly in a vacuum environment. Because there is almost no medium that can maintain arc burning in a vacuum environment, the arc will be extinguished in a very short time (usually within half a power frequency cycle), thereby preventing the damage to the equipment caused by the continuous burning of the arc. At the same time, the circuit is disconnected.

[0048] However, with the increase of usage time, local melting and ablation will appear on the contact surface of the moving end contact 210 and the static end contact 230. Especially under high load conditions, this arc ablation will not only cause the surface to be uneven, but also form pits locally, resulting in a reduction in the contact area between the two when they are in contact, thereby increasing the resistance of the two. Therefore, the present invention provides an adjustment component on the pole body 100, and adjusts the moving end contact 210 through the adjustment component, so that the contact area between the moving end contact 210 and the static end contact 230 is kept as large as possible, thereby reducing the frequency of the above situation.

[0049] The adjustment component configuration is:

[0050] When the moving end contact 210 approaches the static end contact 230, the adjusting component can drive the moving end contact 210 to rotate a preset angle, thereby adjusting the contact area between the moving end contact 210 and the static end contact 230; when the moving end contact 210 moves away from the static end contact 230, the adjusting component limits the rotation of the moving end contact 210, and the adjusting component drives the moving end contact 210 to rotate only when the moving end contact 210 approaches the static end contact 230.

[0051] It should be noted that each time the moving end contact 210 approaches the static end contact 230, the moving end contact 210 will rotate by a preset angle. Since the contact surfaces of the moving end contact 210 and the static end contact 230 are uneven, the moving end contact 210 is adjusted to rotate to find the position where the contact surfaces of the two are at their maximum. For example, assuming that the static end contact 230 has a protrusion and the moving end contact 210 has a pit, if the protrusion and the pit do not overlap, a large gap will be generated between the moving end contact 210 and the static end contact 230, and the contact area between the two will be affected by the protrusion and the pit and reduced. By rotating the moving end contact 210 to make the protrusion and the pit overlap, the moving end contact 210 and the static end contact 230 are tightly fitted, that is, the contact area between the two is maximized.

[0052] A scale 226 is provided on the moving end contact 210, and the scale 226 moves synchronously with the moving end contact 210. When the moving end contact 210 moves and contacts with the static end contact 230, the data of the scale 226 is recorded, and the data of each time the moving end contact 210 contacts the static end contact 230 is recorded. When the cumulative rotation angle of the moving end contact 210 exceeds 360°, the recording is stopped, and the data with the longest moving distance of the moving end contact 210 is searched among these recorded data. The data corresponding to this data has the largest contact surface between the moving end contact 210 and the static end contact 230. It can be understood that when there is a gap between the moving end contact 210 and the static end contact 230, the distance moved by the moving end contact 210 when contacting the static end contact 230 is smaller than the distance moved when there is no gap between the moving end contact 210 and the static end contact 230, that is, when there is a gap between the two, the distance moved by the moving end contact 210 is shorter, and when the two are in close contact and there is no gap, the distance moved by the moving end contact 210 is longer. Therefore, the data of the scale 226 is recorded to determine the distance moved by the moving end contact 210 each time it contacts the static end contact 230. After comparison, the data with the longest moving distance is found, which means that the contact area between the moving end contact 210 and the static end contact 230 of this data is the largest. Therefore, the position of the moving end contact 210 corresponding to the data is used to contact the static end contact 230, so that the moving end contact 210 and the static end contact 230 are at the largest contact area.

[0053] Specifically, the adjustment assembly in this embodiment includes an adjustment sleeve 300 and an adjustment rod 310. The adjustment sleeve 300 is fixed to the movable end contact 210. The outer wall of the adjustment sleeve 300 is provided with a first slide groove 301 and a second slide groove 302. Figure 7As shown, there are multiple first slide grooves 301 and second slide grooves 302, the first slide grooves 301 extend along the axial direction of the adjusting sleeve 300, and the first slide grooves 301 are evenly distributed along the radial direction of the adjusting sleeve 300, and the second slide grooves 302 are connected to the first slide grooves 301, specifically, the upper and lower ends of the second slide grooves 302 are respectively connected to the upper and lower ends of two adjacent first slide grooves 301, that is, the upper end of the second slide groove 302 is connected to the upper end of the adjacent first slide grooves 301, and the lower end of the second slide groove 302 is connected to the lower end of another adjacent first slide groove 301, and the second slide groove 302 is a spiral groove, and the spiral groove has an arc to adapt to the outer wall of the adjusting sleeve 300, and the multiple first slide grooves 301 and the second slide grooves 302 surround the outer circumference of the adjusting sleeve 300 for a full week, and the multiple first slide grooves 301 and the second slide grooves 302 are connected to each other. One end of the adjusting rod 310 is fixedly set in the arc extinguishing chamber 200. For the convenience of connection, the adjusting rod 310 is fixedly connected in the arc extinguishing chamber 200 through the fixing rod 311, and the other end of the adjusting rod 310 is slidably set in the first slide groove 301 or the second slide groove 302, that is, the adjusting rod 310 can slide in the first slide groove 301 or the second slide groove 302.

[0054] When the moving end contact 210 begins to move toward the direction approaching the static end contact 230, the moving end contact 210 drives the adjusting sleeve 300 to move upward, and the adjusting rod 310 enters the second sliding groove 302 from the upper end of the first sliding groove 301 and the connection between the second sliding groove 302. When the adjusting sleeve 300 rises, since the adjusting rod 310 is fixedly arranged in the arc extinguishing chamber 200, the adjusting rod 310 can make the adjusting sleeve 300 rotate when sliding in the second sliding groove 302. When the adjusting rod 310 slides from the upper end of the second sliding groove 302 to the lower end of the second sliding groove 302, the adjusting sleeve 300 drives the moving end contact 210 to rotate a preset angle (the preset angle refers to the angle of rotation of the adjusting sleeve 300 when the adjusting rod 310 slides from the upper end to the lower end in the second sliding groove 302, and the size of the preset angle is related to the angle between the first sliding groove 301 and the second sliding groove The adjusting rod 310 is located at the lower end of the first slide groove 301, and the adjusting sleeve 300 is located at the upper end of the first slide groove 301, and the adjusting sleeve 300 is located at the lower end of the first slide groove 301, and the adjusting sleeve 300 is located at the lower end of the first slide groove 301, and the adjusting sleeve 300 is located at the upper end of the first slide groove 301 and the lower end of the second slide groove 302. During this process, the adjusting sleeve 300 does not rotate, that is, the moving end contact 210 does not rotate.

[0055] It can be understood that each time the movable contact 210 moves toward the static contact 230, the movable contact 210 rotates, and each time it moves away from the static contact 230, the movable contact 210 does not rotate, and this cycle is repeated until the movable contact 210 stops after one rotation.

[0056] In a further embodiment, a steering assembly is provided on one end of the adjusting rod 310 located at the first slide groove 301 or the second slide groove 302. When the adjusting rod 310 is located at the upper end of the first slide groove 301 and the adjusting sleeve 300 moves upward, that is, when the adjusting rod 310 is at the connection between the upper end of the first slide groove 301 and the second slide groove 302 and the adjusting sleeve 300 moves upward, the steering assembly can enable the adjusting rod 310 to enter the second slide groove 302, thereby realizing the rotation of the adjusting sleeve 300.

[0057] Specifically, the steering assembly in this embodiment includes a steering wheel 312, a first paddle 313 and a second paddle 314. The steering wheel 312 is coaxially and vertically connected to one end of the adjustment rod 310 located in the first slide groove 301 or the second slide groove 302. The first paddle 313 and the second paddle 314 are both slidably arranged on the side wall of the steering wheel 312. The first paddle 313 can be extended and retracted toward the extension direction of the first slide groove 301, and the second paddle 314 can be extended and retracted toward the extension direction of the second slide groove 302. Figure 6 As shown, the first paddle 313 is located at the top, the second paddle 314 is located at the lower right, and an elastic member 315 is connected between the first paddle 313 and the second paddle 314 at one end inside the steering wheel 312, and the elastic member 315 elastically connects the two. When the steering wheel 312 is in the first slide groove 301, the second paddle 314 is abutted by the side wall of the first slide groove 301 and retracted inside the steering wheel 312, while the first paddle 313 is not blocked and the first paddle 313 is extended; when the steering wheel 312 slides to the upper end, that is, the connection between the upper end of the first slide groove 301 and the second slide groove 302, the first paddle 313 abuts against the inner wall of the upper end of the first slide groove 301 and retracts inside the steering wheel 312, and at this time the elastic member 315 pulls the second paddle 314 out of the steering wheel 312. The second paddle 314 is pushed out from the inside and extends into the second slide groove 302. When the adjusting sleeve 300 moves upward, the adjusting rod 310 enters the second slide groove 302 under the guidance of the second paddle 314. When the adjusting rod 310 slides from the second slide groove 302 to the first slide groove 301, the second paddle 314 abuts against the side wall of the first slide groove 301 and shrinks inward, and the elastic member 315 pushes the first paddle 313 to extend, thereby preventing the adjusting rod 310 from entering the previous second slide groove 302 from the first slide groove 301.

[0058] It should be noted that the steering assembly is not limited to the above structure, and the steering assembly can also be a steering wheel 312 and two telescopic rods, the layout of the two telescopic rods can be the same as the layout of the first paddle 313 and the second paddle 314, and the telescopic rods can be extended and retracted. When the steering wheel 312 rotates to the connection between the upper end of the first slide slot 301 and the second slide slot 302, one telescopic rod shortens and the other extends into the second slide slot 302. Of course, other structures that can achieve the above functions can also be used, which are not specifically limited here.

[0059] In a further embodiment, the adjusting rod 310 of the present invention can be telescopic, and a third slide groove 303 is opened in the first slide groove 301. The size and extension direction of the third slide groove 303 are the same as those of the first slide groove 301. When the adjusting rod 310 is extended, it can extend into the third slide groove 303. When the adjusting rod 310 is located in the third slide groove 303, the second paddle 314 of the steering wheel 312 on the adjusting rod 310 is always in a retracted state, and the second paddle 314 cannot extend into the second slide groove 302. Therefore, when the adjusting rod 310 extends into the third slide groove 303, the adjusting rod 310 can no longer enter the second slide groove 302. That is to say, when the adjusting rod 310 slides in the third slide groove 303, the adjusting sleeve 300 cannot rotate. After the movable contact 210 rotates one circle, the position of the adjusting sleeve 300 with the longest moving distance is selected, and the adjusting rod 310 is extended into the third slide groove 303 so that the subsequent movement of the movable contact 210 is all in this position, ensuring that the contact area between the movable contact 210 and the static contact 230 is maximized.

[0060] It can be understood that as time goes by, the contact area between the adjusted moving end contact 210 and the static end contact 230 will still change. Therefore, the rotation of the moving end contact 210 can be adjusted regularly. After adjusting to a suitable position, the adjustment rod 310 is extended into the third slide groove 303, so that the moving end contact 210 moves at this position for a period of time, and then adjusted again after moving for a period of time.

[0061] Specifically, a switch assembly is provided in the arc extinguishing chamber 200, and the switch assembly is used to control the extension and retraction of the adjustment rod 310, that is, to control whether the adjustment assembly drives the moving end contact 210 to rotate. The switch assembly is configured as follows:

[0062] When the adjustment component is required to drive the movable end contact 210 to rotate, the switch component pushes the adjustment rod 310 to shorten, and the adjustment rod 310 can be separated from the third slide groove 303, and the adjustment rod 310 can move in the first slide groove 301 or the second slide groove 302, so that the adjustment component can drive the movable end contact 210 to rotate to find the maximum contact area;

[0063] When the adjustment component is no longer needed to drive the moving end contact 210 to rotate or the adjustment component is completed, the switch component pushes the adjustment rod 310 to extend, and the adjustment rod 310 enters the third slide groove 303. The adjustment rod 310 can only move in the third slide groove 303, and the adjustment sleeve 300 cannot rotate, that is, the moving end contact 210 cannot rotate, thereby limiting the rotation of the moving end contact 210.

[0064] Specifically, the adjustment component includes a limiting rod 400 and a compression spring 410. The compression spring 410 is arranged inside the adjustment rod 310. The adjustment rod 310 has two parts. One part of the adjustment rod 310 is fixed in the arc extinguishing chamber 200, and the other part of the adjustment rod 310 is guided in the part fixed in the arc extinguishing chamber 200. The compression spring 410 serves to connect the two parts, and at the same time, the compression spring 410 can push the adjustment rod 310 to extend. The limiting rod 400 is slidably arranged in the arc extinguishing chamber 200, with one end of the limiting rod 400 facing the adjusting rod 310. A wedge block 316 is fixedly connected to the outer peripheral surface of the adjusting rod 310, and the limiting rod 400 abuts against the wedge block 316. When the limiting rod 400 moves toward the direction approaching the adjusting rod 310, the limiting rod 400 pushes the adjusting rod 310 to compress the compression spring 410 under the action of the inclined surface of the wedge block 316, so that the length of the adjusting rod 310 is shortened. When the limiting rod 400 moves in the direction away from the adjusting rod 310, the compression spring 410 releases the elastic force and the adjusting rod 310 extends.

[0065] More specifically, an adjusting handle 420 is provided on the end of the limiting rod 400 away from the adjusting rod 310. The adjusting handle 420 is used to control whether the limiting rod 400 moves toward the direction close to the adjusting rod 310 or moves away from the adjusting rod 310. The adjusting handle 420 is hinged at the bottom end of the arc extinguishing chamber 200. An arc ball 421 is fixedly provided on the end of the adjusting handle 420 close to the limiting rod 400. The limiting rod 400 abuts against the arc ball 421. When the operator pushes the adjusting handle 420 to the water level, the adjusting handle 420 moves to the water level. When in the flat state, the arc ball 421 on the adjusting handle 420 does not push the limiting rod 400, and the limiting rod 400 does not push the adjusting rod 310 to shorten; when the operator pushes the adjusting handle 420 to the vertical state, the arc ball 421 on the adjusting handle 420 squeezes the limiting rod 400, and the limiting rod 400 pushes the wedge block 316 to shorten the limiting rod 400, thereby realizing the function of controlling whether the limiting rod 400 moves in a direction close to the adjusting rod 310 or in a direction away from the adjusting rod 310.

[0066] In order to keep the arc extinguishing chamber 200 in a vacuum state at all times, a small bellows 401 is fixedly connected to the end of the limiting rod 400 close to the adjusting handle 420, and the other end of the small bellows 401 is sealed and fixedly connected to the bottom of the arc extinguishing chamber 200, thereby preventing the movement of the limiting rod 400 and destroying the vacuum state of the arc extinguishing chamber 200.

[0067] It should be noted that the switch assembly that realizes the extension and retraction of the adjustment rod 310 can also be other structures. For example, the adjustment rod 310 can be directly replaced with a retractable structure. When the moving end contact 210 needs to be adjusted, the adjustment rod 310 is shortened. When the adjustment is completed or no adjustment is needed, the adjustment rod 310 can be extended. Of course, other structures can also be used, which are not specifically limited here.

[0068] In a further embodiment, a moving conductive column 220 is further provided between the moving end contact 210 and the moving end contact arm 110, and the moving conductive column 220 is connected to the moving end contact arm 110 through a wire. Similarly, a static conductive column 240 is provided between the static end contact 230 and the static end contact arm 120, and the static conductive column 240 is connected to the static end contact arm 120 through a wire. The moving conductive column 220 has an upper and lower part, and a rotating assembly is provided between the upper and lower parts. The function of the moving end contact 210 being able to rotate can be realized by providing the rotating assembly.

[0069] It should be noted that, in order to facilitate data reading, the scale 226 of the present invention is fixedly connected to the moving conductive column 220 , so that the scale 226 is indirectly connected to the moving end contact 210 .

[0070] The rotating assembly includes a first rotating disk 221, a second rotating disk 222 and a clamp 223. The first rotating disk 221 and the second rotating disk 222 are coaxially and fixedly connected to the two parts of the moving conductive column 220 respectively. The first rotating disk 221 and the second rotating disk 222 are in rotational contact with each other, and a plurality of annular grooves and annular protrusions are provided on the surfaces in rotational contact with each other, so as to avoid circumferential displacement of the first rotating disk 221 and the second rotating disk 222 when rotating. The clamp 223 clamps the first rotating disk 221 and the second rotating disk 222 together to prevent the first rotating disk 221 and the second rotating disk 222 from detaching.

[0071] It can be understood that the first rotating disk 221 and the second rotating disk 222 are both made of conductive materials, which do not affect the conductivity of the two parts of the movable conductive column 220 .

[0072] To facilitate the vacuum-tight connection of the arc extinguishing chamber 200, the moving conductive column 220 is connected to the insulating pull rod 140, and the insulating pull rod 140 drives the moving conductive column 220 to move. A large bellows 225 is provided on the moving conductive column 220, and one end of the large bellows 225 is connected to the connection position between the second rotating disk 222 and the moving conductive column 220, and the other end of the large bellows 225 is fixedly connected to the bottom of the arc extinguishing chamber 200. When the moving conductive column 220 moves, the large bellows 225 plays a sealing role.

[0073] Specifically, a first shielding cover 224 is fixedly provided on the outer periphery of the upper part of the moving conductive column 220, and the adjusting sleeve 300 is fixedly connected to the moving conductive column 220 through the first shielding cover 224, and then indirectly connected to the moving end contact 210. At the same time, a second shielding cover 241 is provided on the static conductive column 240. The setting of the two shielding covers further improves the arc extinguishing effect of the arc extinguishing chamber 200.

[0074] The specific working process of a sealed pole for a load switch provided by the present invention is described in combination with the above embodiments:

[0075] Normal use:

[0076] The adjustment handle 420 is in a horizontal state, and the adjustment rod 310 is in an extended state. The adjustment rod 310 is located in the third slide groove 303. When the insulating pull rod 140 pushes the moving conductive column 220 to move, and the moving conductive column 220 drives the moving end contact 210 to move toward or away from the static end contact 230, the moving end contact 210 does not rotate, and can complete the normal function of connecting and disconnecting the circuit.

[0077] adjust:

[0078] As the use time increases, local melting and ablation will occur on the contact surface of the moving end contact 210 and the static end contact 230, especially under high load conditions. This arc ablation will not only cause an uneven surface, but also form pits locally, thereby reducing the actual contact area and increasing the resistance to electric shock. Therefore, the operator pushes the adjustment handle 420 and adjusts the adjustment handle 420 to a vertical state, so that the limiting rod 400 pushes the adjustment to shorten, so that the adjustment rod 310 can disengage from the third slide groove 303, and the adjustment rod 310 can slide in the first slide groove 301 or the second slide groove 302.

[0079] The insulating pull rod 140 continuously pushes the moving end contact 210 to contact and move away from the static end contact 230. When the moving end contact 210 moves toward the static end contact 230, the adjusting rod 310 is located at the connection between the upper end of the first slide groove 301 and the second slide groove 302. The first paddle 313 of the steering wheel 312 on the adjusting rod 310 is pressed by the inner wall of the first slide groove 301 and retracted in the steering wheel 312, and the second paddle 314 is pushed by the elastic member 315 to extend into the second slide groove 302. The second paddle 314 plays a guiding role, and the adjusting rod 310 enters the second slide groove 302. The adjusting sleeve 300 rotates under the action of the second slide groove 302, and the adjusting rod 310 enters another first slide groove 302 from the lower end of the second slide groove 302. 1, the moving end contact 210 continues to approach the static end contact 230 until it contacts with the static end contact 230 and stops. At this time, the data on the scale 226 is recorded, and the moving end contact 210 begins to move away from the static end contact 230. At this time, the adjustment rod 310 moves from the lower end of the first slide groove 301 to the upper end of the first slide groove 301 and the connection between the second slide groove 302, and reciprocates until the adjustment rod 310 slides once in all the second slide grooves 302, that is, the moving end contact 210 rotates one circle, and the data of the scale 226 are recorded multiple times. The data with the largest value is obtained by comparison, indicating that the moving end contact 210 moves the farthest distance to approach the static end contact 230, that is, the contact area between the moving end contact 210 and the static end contact 230 is the largest.

[0080] The insulating pull rod 140 repeatedly pushes the moving end contact 210 to contact and move away from the static end contact 230. When the moving end contact 210 rotates to a position where the contact area with the static end contact 230 reaches a maximum, the operator pushes the adjustment handle 420 to adjust the adjustment handle 420 to a horizontal state. The limiting rod 400 no longer limits the extension of the adjustment rod 310. The compression spring 410 in the adjustment rod 310 pushes the adjustment rod 310 to extend. The adjustment rod 310 enters the third slide groove 303 to limit the rotation of the adjustment sleeve 300. The adjustment is completed. The subsequent moving end contact 210 no longer rotates until it is used and needs to be adjusted again. The adjustment handle 420 is then pushed to a vertical state so that the adjustment component drives the moving end contact 210 to rotate again.

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A sealed pole for a load switch, characterized in that: include: A pole body, wherein a static contact arm and a moving contact arm are connected to the outside of the pole body, an arc extinguishing chamber is provided inside the pole body, and a static contact and a moving contact are arranged in the arc extinguishing chamber; An insulating pull rod, which can drive the movable end contact to contact with or away from the static end contact; An adjustment component, wherein the adjustment component is configured as follows: When the movable end contact approaches the static end contact, the adjusting component drives the movable end contact to rotate by a preset angle and then stops rotating; When the movable end contact is away from the static end contact, the adjusting assembly restricts the movable end contact from rotating relative to the static end contact; A scale, the scale being connected to the moving end contact, the scale being capable of recording the distance moved by the moving end contact each time when the moving end contact contacts the static end contact, and the moving end contact contacts the static end contact at the position where the moving distance is the farthest after rotating one circle; The adjusting assembly comprises an adjusting sleeve and an adjusting rod, wherein the adjusting sleeve is fixedly connected to the movable end contact, and a plurality of first slide grooves and second slide grooves are provided on the outer side wall of the adjusting sleeve, wherein the first slide grooves extend along the axial direction of the adjusting sleeve and are evenly distributed along the radial direction of the adjusting sleeve, and the second slide grooves are spiral grooves and the two ends of the second slide grooves are respectively connected to the upper end and the lower end of two adjacent first slide grooves, and one end of the adjusting rod is fixedly arranged in the arc extinguishing chamber, and the other end of the adjusting rod is located in the first slide groove or the second slide groove; When the movable end contact moves toward the static end contact, the adjusting rod enters the second sliding groove, and the adjusting sleeve drives the movable end contact to rotate by a preset angle; When the movable end contact moves in a direction away from the static end contact, the adjusting rod is located in the first sliding groove, and the first sliding groove limits the rotation of the adjusting sleeve.

2. The sealed pole for load switch according to claim 1, characterized in that: A steering assembly is provided on one end of the adjusting rod located in the first slide groove or the second slide groove. When the adjusting rod is located at the upper end of the first slide groove and the adjusting sleeve moves upward, the steering assembly can turn the adjusting rod from the first slide groove to the second slide groove.

3. The sealed pole for load switch according to claim 2, characterized in that: The steering assembly includes a steering wheel, a first paddle and a second paddle, the surface of the steering wheel is vertical and fixedly connected to one end of the adjusting rod located in the first slide groove or the second slide groove, the first paddle and the second paddle are both slidably arranged on the side wall of the steering wheel, the first paddle can slide along the extension direction of the first slide groove, and the second paddle can slide along the extension direction of the second slide groove, an elastic member is connected between one end of the first paddle and the second paddle located in the steering wheel, and when the steering wheel is located at the upper end of the first slide groove, the first paddle is compressed and pushes the second paddle into the second slide groove to guide the adjusting rod into the second slide groove.

4. The sealed pole for load switch according to claim 3, characterized in that: The adjusting rod is retractable, a third sliding groove is provided at the bottom of the first sliding groove, the third sliding groove has the same extension direction and size as the first sliding groove, the adjusting rod can extend into the third sliding groove when extended, and after the adjusting rod enters the third sliding groove, it limits the second paddle from extending into the second sliding groove.

5. The sealed pole for load switch according to claim 4, characterized in that: A switch assembly is provided in the arc extinguishing chamber, and the switch assembly can control the extension and shortening of the adjusting rod, and the switch assembly is configured as follows: When the movable end contact is adjusted to rotate, the switch assembly pushes the adjusting rod to shorten, and the adjusting rod can be located in the first sliding groove or the second sliding groove; After the movable end contact is adjusted, the switch assembly pushes the adjusting rod to extend, and the adjusting rod can be located in the third sliding groove.

6. The sealed pole for load switch according to claim 5, characterized in that: The switch assembly includes a limiting rod and a compression spring, wherein the compression spring is located inside the adjusting rod, and the compression spring makes the adjusting rod tend to extend. A wedge block is arranged on the outer peripheral wall of the adjusting rod, and the limiting rod is slidably arranged in the arc extinguishing chamber. One end of the limiting rod abuts against the wedge block, and the limiting rod can push the wedge block when moving toward the adjusting rod, and the wedge block drives the adjusting rod to shorten. When the limiting rod moves away from the adjusting rod, the compression spring pushes the adjusting rod to extend.

7. The sealed pole for load switch according to claim 1, characterized in that: A dynamic conductive column is fixedly connected to the bottom of the moving end contact, and the dynamic conductive column is electrically connected to the moving end contact arm. The dynamic conductive column has two parts, an upper part and an lower part, and a rotating component is arranged between the two parts. The rotating component rotatably connects the two parts, and the upper and lower parts of the dynamic conductive column can rotate relative to each other.

8. The sealed pole for load switch according to claim 7, characterized in that: The rotating assembly includes a first rotating disk, a second rotating disk and a clamp, the first rotating disk and the second rotating disk are respectively fixed to the upper and lower parts of the moving conductive column, the first rotating disk and the second rotating disk are coaxial and rotated in contact with each other, and the clamp is clamped on two end surfaces of the first rotating disk and the second rotating disk that are away from each other to limit the first rotating disk and the second rotating disk from disengaging.

9. The sealed pole for load switch according to claim 7, characterized in that: A first shielding cover is fixedly disposed on the outer periphery of the upper part of the dynamic conductive column, a static conductive column is disposed on the static end contact, and a second shielding cover is fixedly disposed on the outer periphery of the static conductive column.

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