Integrated insulated isolated rotating shaft

Abstract

The utility model relates to an integrated insulation isolation rotating shaft. Including insulation main shaft body and reinforcing structural member, this structure is the integrated design, has reduced the number of spare parts, makes the installation process more simple and quick, can effectively shorten the installation time, reduces the installation cost. The different reinforcing ribs are reasonably arranged at different positions on the structure, the stress concentration point is reduced, the whole structure has excellent mechanical strength and insulation characteristics, can effectively resist the mechanical stress and electric stress generated in the process of opening and closing, avoids the breakage, the fracture condition, guarantees the performance of switch in several thousand times opening and closing unchanged. Its efficient performance and stable working state reduce the failure rate of equipment, reduce the maintenance cost and the power failure loss caused by the fault, bring better economic benefits for the user.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear, and in particular to an integrated insulating and isolating shaft. Background Technology

[0002] With the continuous development of power systems, higher requirements are being placed on the reliability, safety, and environmental protection of power equipment. As a key piece of equipment in medium and low voltage power systems, environmental protection cabinets need continuous optimization and upgrading. Integrated insulated and isolated rotating shafts can improve the performance of environmental protection cabinets and meet the needs of power system development.

[0003] In the operation of power equipment, frequent opening and closing operations place enormous mechanical stress and fatigue loads on the rotating shaft, imposing extremely high requirements on its strength and durability. Traditional rotating shafts, after thousands of opening and closing operations, often suffer from insufficient strength in the front and rear walls of the switch arm, openings, and knife seat holes, frequently resulting in damage and breakage. This affects switching performance and seriously impacts the normal operation of the equipment and the stability of the power system. Furthermore, existing technologies typically employ a modular assembly structure. Structures formed by splicing together the tap changer shafts are not only cumbersome to assemble and costly, but also suffer from insufficient mechanical strength. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an integrated insulating and isolating rotating shaft.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an integrated insulating and isolating rotating shaft, the innovation of which is: including an insulating main shaft body and reinforcing structural components; The insulating main shaft is horizontally arranged and has three single-phase disconnector crank arms, including a first-phase disconnector crank arm, a second-phase disconnector crank arm, and a third-phase disconnector crank arm from left to right. At the bottom of the single-phase disconnector crank arms, the insulating main shaft is also provided with multiple contact knife seats, including a first-phase contact knife seat, a second-phase contact knife seat, and a third-phase contact knife seat respectively located at the bottom of the first-phase disconnector crank arm, the second-phase disconnector crank arm, and the third-phase disconnector crank arm. The reinforcing structural component includes a first reinforcing rib disposed on the insulating main shaft and located between two adjacent single-phase knife switch crank arms, a second reinforcing rib disposed on the outer wall of the single-phase knife switch crank arm, and a third reinforcing rib disposed on the inner wall of the contact knife seat. The insulating main shaft, single-phase knife switch crank arm, contact knife seat, and reinforcing structural components are integrally injection molded from plastic nylon.

[0006] Furthermore, the first reinforcing rib includes a star-shaped upper reinforcing rib disposed on the top of the insulating spindle body and a star-shaped lower reinforcing rib disposed on the bottom of the insulating spindle body; The second reinforcing rib includes a vertical reinforcing rib and an L-shaped reinforcing rib. The vertical reinforcing rib is disposed on the outer wall of each single-phase disconnector crank arm and is disposed at the same height as the single-phase disconnector crank arm. The L-shaped reinforcing rib is disposed on the left and right sides of the three single-phase disconnector crank arms and is located between the single-phase disconnector crank arm and the insulating main shaft. The third reinforcing rib includes an arched reinforcing rib disposed on one side of the inner wall of each contact knife holder and an inner wall reinforcing rib disposed on the other side of the inner wall of each contact knife holder. The arched reinforcing rib includes a rectangular rib plate, and an arc-shaped groove is formed in the center of the bottom of the rib plate. The arc-shaped groove provides sufficient space for the contact knife holder and also provides support for the deformation of the insulating spindle.

[0007] Furthermore, the single-phase disconnector crank arm has a vertical channel inside, which is connected to the contact knife seat at its bottom. The second reinforcing rib also includes an opening reinforcing rib disposed in the middle of the bottom opening of the vertical channel of each single-phase disconnector crank arm, so that the opening of the single-phase disconnector crank arm is not easily deformed, and the opening strength is also increased.

[0008] Furthermore, the insulating spindle body has integrally formed cylindrical support steps and positioning spline grooves on both sides of its length to provide positioning for the insulating spindle body.

[0009] Furthermore, the reinforcing structural component also includes several umbrella-shaped structures arranged in the circumferential direction of the insulating main shaft, which strengthens the overall strength of the front and rear walls of the rotary shaft.

[0010] The advantages of this utility model are: 1. This structure features an integrated design, reducing the number of parts and making the installation process simpler and faster, effectively shortening installation time and reducing installation costs.

[0011] 2. Different reinforcing ribs are reasonably set at different locations in this structure to reduce stress concentration points, giving the structure excellent mechanical strength and insulation properties. It can effectively resist the mechanical and electrical stress generated during the opening and closing process, avoiding damage and breakage, and ensuring that the switch performance remains unchanged after thousands of opening and closing cycles. Its high efficiency and stable operation reduce the equipment failure rate, lower maintenance costs and power outage losses caused by failures, and bring better economic benefits to users.

[0012] 3. This structure uses high-strength, high-insulation composite materials. These materials have excellent mechanical strength and insulation properties, and can effectively resist the mechanical and electrical stresses generated during the opening and closing of the circuit breaker.

[0013] 4. This structure enhances the overall stability and mechanical strength, and significantly improves the overall torsional and toughness performance, greatly increasing the reliability and service life of power equipment and providing a solid guarantee for the stable operation of the power system.

[0014] 5. The arched reinforcing rib includes a rectangular stiffening plate, and an arc-shaped groove is opened in the center of the bottom of the stiffening plate. The arc-shaped groove provides sufficient space for the contact knife seat and also provides support for the deformation of the insulating main shaft. The multi-directional intersecting ribs of the cross-shaped lower reinforcing rib and the cross-shaped upper reinforcing rib form a spatial truss structure, which enhances the overall rigidity and reduces deformation. Attached Figure Description

[0015] Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a bottom view of the present invention.

[0017] Figure 3 This is the left view of the present invention.

[0018] Figure 4 This is the right view of the present invention.

[0019] Figure 5 This is a cross-sectional view of the present invention.

[0020] Figure 6 This is a diagram illustrating the practical application of this utility model. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] like Figure 1-5 The illustrated integrated insulated shaft includes an insulated main shaft body 6 and a reinforcing structural component.

[0023] The insulated spindle body 6 is set horizontally, and cylindrical support steps 14 and positioning spline grooves 15 are respectively provided on both sides of the length of the insulated spindle body 6 to provide positioning for the installation of the insulated spindle body 6.

[0024] The insulating main shaft 6 is provided with three single-phase disconnector crank arms, including a first-phase disconnector crank arm 1, a second-phase disconnector crank arm 4, and a third-phase disconnector crank arm 5 from left to right. At the bottom of the single-phase disconnector crank arms on the insulating main shaft 6, there are also multiple contact knife seats, including a first-phase contact knife seat 10, a second-phase contact knife seat 8, and a third-phase contact knife seat 7 respectively located at the bottom of the first-phase disconnector crank arm 1, the second-phase disconnector crank arm 4, and the third-phase disconnector crank arm 5.

[0025] The reinforcing structural components include a first reinforcing rib disposed on the insulating main shaft 6 and located between two adjacent single-phase knife switch crank arms, a second reinforcing rib disposed on the outer wall of the single-phase knife switch crank arm, and a third reinforcing rib disposed on the inner wall of the contact knife seat.

[0026] The insulating main shaft 6, single-phase disconnector crank arm, contact knife seat, reinforcing structural components, cylindrical support step 14, and positioning spline groove 15 are integrally injection molded from plastic nylon. The dimensional parameters of each component are optimized and rationally adjusted using finite element analysis technology. By rationally setting different reinforcing ribs at different locations on this structure, stress concentration points are reduced, and the overall structural stability is enhanced. In particular, the strength of the front and rear walls and openings of the disconnector shaft and the knife seat openings are improved, thereby enhancing the overall structural stability and mechanical strength. The overall torsional and toughness performance has been greatly improved, which greatly enhances the reliability and service life of the power equipment and provides a solid guarantee for the stable operation of the power system.

[0027] This structure features an integrated design, reducing the number of parts and making the installation process simpler and faster, effectively shortening installation time and reducing installation costs.

[0028] The structure uses high-strength, high-insulation composite materials, which have excellent mechanical strength and insulation properties, and can effectively resist the mechanical and electrical stresses generated during the opening and closing process.

[0029] The first reinforcing rib includes a cross-shaped upper reinforcing rib 3 disposed at the top of the insulating main shaft 6 and a cross-shaped lower reinforcing rib 12 disposed at the bottom of the insulating main shaft 6.

[0030] The second reinforcing rib includes a vertical reinforcing rib 2 and an L-shaped reinforcing rib. The vertical reinforcing rib 2 is set on the outer wall of each single-phase disconnector crank arm and is set at the same height as the single-phase disconnector crank arm. The L-shaped reinforcing rib is set on the left and right sides of the three single-phase disconnector crank arms and is located between the single-phase disconnector crank arms and the insulating main shaft body 6.

[0031] The third reinforcing ribs include an arched reinforcing rib 9 disposed on one side of the inner wall of each contact knife holder and a reinforcing rib 11 disposed on the other side of the inner wall of each contact knife holder.

[0032] The arched reinforcing rib 9 includes a rectangular rib plate, and an arc-shaped groove is provided at the center of the bottom of the rib plate. The arc-shaped groove provides sufficient space for the contact knife seat and also provides support for the deformation of the insulating main shaft 6.

[0033] The single-phase disconnector crank arm has a vertical channel inside, which is connected to the contact knife seat at its bottom. The second reinforcing rib also includes an opening reinforcing rib 13 located in the middle of the opening at the bottom of the vertical channel of each single-phase disconnector crank arm, so that the opening of the single-phase disconnector crank arm is not easily deformed, and the opening strength is also increased.

[0034] The reinforcing structural components also include several umbrella-shaped structures arranged in the circumferential direction on the insulating main shaft body 6, which strengthen the overall strength of the front and rear walls of the switch.

[0035] This structure incorporates various reinforcing ribs at different locations, resulting in excellent mechanical strength and insulation properties. This effectively resists the mechanical and electrical stresses generated during opening and closing, ensuring the switch's performance remains unchanged after thousands of cycles. Its high efficiency and stable operation reduce equipment failure rates, lower maintenance costs, and minimize power outage losses due to malfunctions, ultimately bringing better economic benefits to users.

[0036] This structure can effectively isolate components with different potentials, prevent leakage and short circuits, and thus improve the insulation performance and safety of the ring main unit.

[0037] After actual testing and verification, the shaft remained intact after thousands of opening and closing operations, without any damage or breakage, which greatly improved the reliability and service life of the power equipment and provided a solid guarantee for the stable operation of the power system.

[0038] The working principle of this patent: In a ring main unit, this structure plays a crucial role in the operation of a three-position switch. During operation, this structure primarily operates in three positions: open, closed, and grounded.

[0039] like Figure 6 As shown, a knife switch 23 is installed on each of the three single-phase knife switch 23 crank arms of this insulating and isolating shaft. This insulating and isolating shaft is installed on a three-position mounting plate 21, and the three-position mounting plate 21 is provided with a stationary contact 22 and a grounding contact 24.

[0040] When the insulated shaft rotates to position 25, the knife switch 23 contacts the stationary contact 22, and the insulated shaft is in the closed position. At this time, the three-position switch circuit is in the conducting state, as shown.

[0041] When the insulated rotating shaft rotates to position 26, the knife switch 23 contacts the grounding contact 24, at which point the three-position switch circuit is in a grounded state.

[0042] When the insulated shaft rotates to position 27, the knife switch 23 is between the stationary contact 22 and the grounding contact 24, and the insulated shaft is in the open position. At this time, the three-position switch circuit is in the open state.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An integrated insulated and isolated rotating shaft, characterized in that: Includes an insulated spindle body and reinforcing structural components; The insulating main shaft is horizontally arranged and has three single-phase disconnector crank arms, including a first-phase disconnector crank arm, a second-phase disconnector crank arm, and a third-phase disconnector crank arm from left to right. At the bottom of the single-phase disconnector crank arms, the insulating main shaft is also provided with multiple contact knife seats, including a first-phase contact knife seat, a second-phase contact knife seat, and a third-phase contact knife seat respectively located at the bottom of the first-phase disconnector crank arm, the second-phase disconnector crank arm, and the third-phase disconnector crank arm. The reinforcing structural component includes a first reinforcing rib disposed on the insulating main shaft and located between two adjacent single-phase knife switch crank arms, a second reinforcing rib disposed on the outer wall of the single-phase knife switch crank arm, and a third reinforcing rib disposed on the inner wall of the contact knife seat. The insulating main shaft, single-phase knife switch crank arm, contact knife seat, and reinforcing structural components are integrally injection molded.

2. The integrated insulating and isolating rotating shaft according to claim 1, characterized in that: The first reinforcing rib includes a star-shaped upper reinforcing rib disposed at the top of the insulating spindle body and a star-shaped lower reinforcing rib disposed at the bottom of the insulating spindle body; The second reinforcing rib includes a vertical reinforcing rib and an L-shaped reinforcing rib. The vertical reinforcing rib is disposed on the outer wall of each single-phase disconnector crank arm and is disposed at the same height as the single-phase disconnector crank arm. The L-shaped reinforcing rib is disposed on the left and right sides of the three single-phase disconnector crank arms and is located between the single-phase disconnector crank arm and the insulating main shaft. The third reinforcing rib includes an arched reinforcing rib disposed on one side of the inner wall of each contact knife seat and a contact knife seat inner wall reinforcing rib disposed on the other side of the inner wall of each contact knife seat. The arched reinforcing rib includes a rectangular rib plate, and an arc-shaped groove is formed in the center of the bottom of the rib plate.

3. The integrated insulating and isolating rotating shaft according to claim 2, characterized in that: The single-phase disconnector crank arm has a vertical channel inside, which is connected to the contact knife seat at its bottom. The second reinforcing rib also includes an opening reinforcing rib disposed in the middle of the bottom opening of the vertical channel of each single-phase disconnector crank arm.

4. The integrated insulating shaft according to claim 1, characterized in that: The insulating spindle body has integrally formed cylindrical support steps and positioning spline grooves on both sides of its length.

5. The integrated insulating and isolating rotating shaft according to claim 1, characterized in that: The reinforcing structural component also includes a plurality of umbrella-shaped skirts arranged in the circumferential direction of the insulating main shaft.

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