Transmission structure of high-voltage isolating switch

Abstract

The invention provides a transmission structure of a high-voltage isolating switch, and relates to the field of electrical equipment, the transmission structure comprises a worm, a worm gear and a transmission rod, the transmission rod is provided with a lower turntable and an upper turntable which can be matched for transmission, and the inner side of the lower turntable is provided with an elastic component which can store energy during rotation; the elastic assembly comprises a first spring, a second spring and a driving block fixedly connected to the bottom of the upper rotary disc, the driving block is installed at the joint of the first spring and the second spring, and the elastic assembly can push the upper rotary disc to rotate rapidly after energy storage is relieved. After energy storage contact, the upper turntable can be driven to rotate quickly, so that the moving contact can be driven to be quickly separated from the static contact, the generation time of an electric arc between the static contact and the moving contact is shortened, the burning and abrasion of the static contact and the moving contact are reduced, and the closing precision and the service life of the static contact and the moving contact are kept.

Description

Technical Field

[0001] This invention relates to the field of power equipment, specifically to a transmission structure for a high-voltage disconnector. Background Technology

[0002] High-voltage disconnect switches are important switching devices in the electrical systems of power plants and substations. They are used to ensure the safety of high-voltage electrical equipment and devices during maintenance and to isolate voltage. When operators operate to open or close the disconnect switch, they need to drive the conductive knife switch to rotate by hand cranking. However, the rotation speed of the conductive knife switch driven by manually turning the crank is relatively slow. As a result, an electric arc can be generated between the stationary and moving contacts for a long time during the disconnection process, which can easily cause burns and wear to the stationary and moving contacts, affecting the closing accuracy and service life of the stationary and moving contacts. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a transmission structure for a high-voltage disconnecting switch. By incorporating a lower turntable capable of storing energy during rotation, the energy-storing contact drives the upper turntable to rotate rapidly. This allows the moving contact to quickly separate from the stationary contact, reducing the time for arc generation between the stationary and moving contacts. Consequently, it reduces burns and wear on the stationary and moving contacts, maintains the closing accuracy and service life of the stationary and moving contacts, and solves the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a transmission structure for a high-voltage disconnecting switch, including a worm gear, a worm wheel, and a transmission rod. A lower turntable and an upper turntable are mounted on the transmission rod to cooperate in transmission. An elastic component that can store energy when rotating is provided on the inner side of the lower turntable. The elastic component includes a first spring, a second spring, and a drive block fixedly connected to the bottom of the upper turntable. The drive block is installed at the junction of the first spring and the second spring. After the energy stored in the elastic component is released, it can drive the upper turntable to rotate rapidly.

[0005] As a preferred transmission structure of the high-voltage disconnect switch of the present invention, a main positioning block and a secondary positioning block are provided on the outer side of the upper turntable to limit the power storage position of the upper turntable, and an annular ring is fixedly installed on the lower turntable to push the main positioning block and the secondary positioning block away from the upper turntable.

[0006] In a preferred embodiment of the transmission structure of a high-voltage disconnect switch of the present invention, the first spring and the second spring are installed in an arc-shaped groove in the lower turntable. When the position of the upper turntable is limited by the main positioning block or the auxiliary positioning block, the lower turntable can compress the first spring and the second spring to store energy while rotating clockwise or counterclockwise, respectively.

[0007] As a preferred transmission structure of the high-voltage disconnecting switch of the present invention, the annular ring is provided with a long groove that does not drive the upper turntable to rotate when rotating and provides energy storage stroke for compressing the first or second spring. A short groove is provided on the adjacent side of the long groove for the secondary positioning block to engage with the upper turntable.

[0008] As a preferred transmission structure of the high-voltage disconnecting switch of the present invention, guide slopes are provided on both sides of the main positioning block and the auxiliary positioning block in the area where they contact the annular ring.

[0009] As a preferred transmission structure of the high-voltage disconnecting switch of the present invention, the upper turntable is provided with a first positioning hole, a second positioning hole and a third positioning hole that cooperate with the positioning protrusions of the main positioning block and the auxiliary positioning block. When the high-voltage disconnecting switch is closed, the positioning protrusion of the main positioning block is embedded in the inner side of the second positioning hole.

[0010] As a preferred transmission structure of the high-voltage disconnecting switch of the present invention, an elastic telescopic rod is fixedly connected to the outer surface of the main positioning block and the auxiliary positioning block, the other end of the elastic telescopic rod is fixedly connected to the fixed bracket, and the fixed end of the fixed bracket is fixedly connected to the steel frame supporting the insulating column.

[0011] As a preferred transmission structure of the high-voltage disconnect switch of the present invention, the drive block is rotatably connected in the arc-shaped groove on the inner side of the lower turntable, and a number of balls are installed on the drive block.

[0012] As a preferred transmission structure of the high-voltage disconnecting switch of the present invention, a sleeve and a rotating seat are installed on the transmission rod connected to the upper turntable, and the sleeve is fixedly installed on the steel frame supporting the insulating column.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] By installing a lower turntable on the transmission rod that can store energy when rotating, the energy stored on the lower turntable can drive the upper turntable to rotate rapidly. This can drive the transmission rod to quickly disconnect or close the moving contact of the conductive knife switch from the stationary contact, reducing the time for arc generation between the stationary and moving contacts. This reduces the burning and wear on the stationary and moving contacts, and maintains the closing accuracy and service life of the stationary and moving contacts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the installation structure of the elastic component of the present invention in the lower turntable;

[0017] Figure 3 This is a schematic diagram of the lower turntable and annular ring structure of the present invention;

[0018] Figure 4 This is a cross-sectional view of the lower turntable of the present invention;

[0019] Figure 5 This is a bottom view of the upper turntable of the present invention;

[0020] Figure 6 This is a schematic diagram of the main positioning block structure of the present invention;

[0021] Figure 7 For the present invention Figure 5 A magnified view of a portion of area A in the middle.

[0022] The components are as follows: 1. Worm gear; 2. Worm wheel; 3. Transmission rod; 4. Lower turntable; 5. Upper turntable; 6. Elastic assembly; 61. First spring; 62. Second spring; 63. Drive block; 7. Main positioning block; 8. Secondary positioning block; 9. Annular ring; 10. Long groove; 11. Short groove; 12. Guide slope; 13. First positioning hole; 14. Second positioning hole; 15. Third positioning hole; 16. Elastic telescopic rod; 17. Fixed bracket; 18. Ball bearing; 19. Sleeve; 20. Rotating seat. Detailed Implementation

[0023] like Figures 1-7 As shown, a transmission structure for a high-voltage disconnector includes a worm gear 1, a worm wheel 2, and a transmission rod 3. A lower turntable 4 and an upper turntable 5 are mounted on the transmission rod 3 for coordinated transmission. An elastic component 6, capable of storing energy during rotation, is located inside the lower turntable 4. The elastic component 6 includes a first spring 61, a second spring 62, and a drive block 63 fixedly connected to the bottom of the upper turntable 5. The drive block 63 is installed at the junction of the first spring 61 and the second spring 62. After the energy stored in the elastic component 6 is released, it can push the upper turntable 5 to rotate rapidly. In traditional conductive disconnectors, manually rotating a rocker arm to drive the conductive disconnector's rotation speed is slow, resulting in the conductive disconnector only closing or opening slowly. During this time, an electric arc is generated between the stationary and moving contacts for a long time. The arc temperature is extremely high, thus causing burns and wear to the stationary and moving contacts. Figure 2 , Figure 3 As shown, a lower turntable 4 capable of storing energy is installed on the transmission rod 3. During the rotation of the lower turntable 4, energy is stored by compressing the first spring 61 or the second spring 62. When the energy is released, the operator continues to rotate the worm gear 1 to drive the transmission rod 3 to rotate. At the same time, the lower turntable 4 can push the drive block 63, the upper turntable 5, and the transmission rod 3 on the upper turntable 5 to rotate rapidly under the elastic force released by the first spring 61 or the second spring 62. This drives the conductive knife switch to close or separate quickly, reducing the time for the electric arc to be generated between the stationary and moving contacts, thereby reducing the burning and wear on the stationary and moving contacts and maintaining the closing accuracy and service life of the stationary and moving contacts.

[0024] Furthermore;

[0025] In an optional embodiment, a main positioning block 7 and a secondary positioning block 8 are provided on the outer side of the upper turntable 5 to limit the energy storage position of the upper turntable 5. An annular ring 9 is fixedly installed on the lower turntable 4 to push the main positioning block 7 and the secondary positioning block 8 away from the upper turntable 5. During the energy storage process of rotating the lower turntable 4, the main positioning block 7 fixes the position of the upper turntable 5 and keeps the upper turntable 5 stable. When the annular ring 9 follows the lower turntable 4 to rotate to the side of the main positioning block 7 and pushes the main positioning block 7 to separate from the upper turntable 5, the fixed state of the upper turntable 5 is released. The upper turntable 5 can rotate rapidly under the drive of the first spring 61 or the second spring 62, thereby driving the conductive knife switch to close or separate quickly.

[0026] In an optional embodiment, the first spring 61 and the second spring 62 are installed in an arc-shaped groove in the lower turntable 4. When the position of the upper turntable 5 is limited by the main positioning block 7 or the secondary positioning block 8, the lower turntable 4 can compress the first spring 61 and the second spring 62 to store energy while rotating clockwise or counterclockwise, respectively. Figure 2 , Figure 3 , Figure 4 As shown, the first spring 61 and the second spring 62 are installed in the arc-shaped groove in the lower turntable 4. The arc-shaped groove can limit the position of the first spring 61 and the second spring 62 above, preventing the first spring 61, the second spring 62 and the drive block 63 from disengaging from the lower turntable 4, so that the first spring 61, the second spring 62 and the drive block 63 can move stably along a predetermined route. The first spring 61 and the second spring 62 can be compressed and stored in different directions when the lower turntable 4 rotates clockwise or counterclockwise, so that the transmission rod 3 can drive the conductive knife switch to quickly close or open in different rotation directions.

[0027] In an optional embodiment, the annular ring 9 has a long groove 10 that, when rotated, does not drive the upper turntable 5 to rotate and provides energy storage for the compression of the first spring 61 or the second spring 62. A short groove 11 is provided on an adjacent side of the long groove 10 for the secondary positioning block 8 to engage with the upper turntable 5. By providing the long groove 10 on the annular ring 9, during the rotation of the lower turntable 4 and the annular ring 9, the annular ring 9 will not press against the main positioning block 7 or the secondary positioning block 8 when the lower turntable 4 rotates. That is, within the rotational stroke of the long groove 10, the lower turntable 4 will not drive the upper turntable 5 to rotate, but only the lower turntable 5 will rotate. The rotation of turntable 4 compresses the first spring 61 or the second spring 62, causing the first spring 61 or the second spring 62 to store energy. After the long groove 10 completes its rotation, the annular ring 9 presses against the main positioning block 7 or the auxiliary positioning block 8, causing the main positioning block 7 or the auxiliary positioning block 8 to release its fixation on the upper turntable 5, thereby releasing the elastic potential energy stored in the first spring 61 or the second spring 62. The short groove 11 opened in the annular ring 9 can be engaged in the short groove 11 after the upper turntable 5 rotates to a certain angle (generally the predetermined position after the conductive knife switch is separated), thus fixing the position of the upper turntable 5.

[0028] In an optional embodiment, guide slopes 12 are provided on both sides of the main positioning block 7 and the sub-positioning block 8 in the areas that contact the annular ring 9. After the annular ring 9 rotates with the lower turntable 4 to compress the first spring 61 or the second spring 62 to store energy, the edge of the long groove 10 of the annular ring 9 can contact the guide slope 12 of the main positioning block 7 or the sub-positioning block 8. The guide slope 12 can reduce the resistance of the main positioning block 7 or the sub-positioning block 8 to the edge of the long groove 10 of the annular ring 9, so that the edge of the long groove 10 can smoothly push the main positioning block 7 or the sub-positioning block 8 to disengage from the upper turntable 5.

[0029] In an optional embodiment, the upper turntable 5 has a first positioning hole 13, a second positioning hole 14, and a third positioning hole 15 that cooperate with the positioning protrusions of the main positioning block 7 and the auxiliary positioning block 8. When the high-voltage disconnecting switch is closed, the positioning protrusion of the main positioning block 7 is embedded inside the second positioning hole 14. When the rocker arm is rotated to separate the conductive switch, the rocker arm drives the worm gear 1 and the worm wheel 2 to rotate, thereby driving the transmission rod 3 connected to the lower turntable 4 to rotate. When the transmission rod 3 drives the lower turntable 4 to rotate, due to the upper turntable... At this time, disk 5 is fixed by the main positioning block 7 (the positioning protrusion of the main positioning block 7 is fixed in the second positioning hole 14). Therefore, during the rotation of the lower turntable 4, the first spring 61 will be compressed to store energy. When the lower turntable 4 continues to rotate, the annular ring 9 that rotates with the lower turntable 4 will slowly approach the main positioning block 7. When the edge of the long groove 10 of the annular ring 9 contacts the guide slope 12 of the main positioning block 7 and continues to rotate, the edge of the long groove 10 of the annular ring 9 can push the main positioning block 7 to move backward and finally release the fixation on the upper turntable 5. At this point, the compressed first spring 61 extends rapidly, thereby pushing the drive block 63 and the upper turntable 5 to rotate rapidly. This, in turn, drives the transmission rod 3 above the upper turntable 5 to rotate and finally drives the conductive knife switch to quickly separate from the stationary contact. During the rotation of the upper turntable 5, the first positioning hole 13 passes through the main positioning block 7 and is locked in place by the positioning protrusion on the main positioning block 7. As the lower turntable 4 continues to rotate, the annular ring 9 continues to contact the guide slope 12 of the main positioning block 7 and pushes the main positioning block 7 to disengage from the upper turntable 5, allowing the upper turntable 5 to continue rotating. At this point, since the elastic potential energy of the first spring 61 has been released, the moving contact of the conductive knife switch has moved away from the stationary contact. Therefore, the locking of the main positioning block 7 in the first positioning hole 13 will not have any adverse effects. After the conductive knife switch rotates to the preset position, the position of the short groove 11 coincides with the secondary positioning block 8. The secondary positioning block 8 can fit against the upper turntable 5 and the positioning protrusion of the secondary positioning block 8 is locked in the third positioning hole 15.During the closing process, the worm gear 1 and worm wheel 2 are rotated in the reverse direction. At this time, the edge of the short groove 11 will first contact the guide slope 12 of the auxiliary positioning block 8, pushing the auxiliary positioning block 8 to disengage from the upper turntable 5. The upper turntable 5 is not fixed, so the upper turntable 5 and the lower turntable 4 rotate simultaneously. When the first positioning hole 13 passes through the main positioning block 7, the positioning protrusion of the main positioning block 7 will engage in the first positioning hole 13 to fix the upper turntable 5. At this time, the lower turntable 4 continues to rotate. When the lower turntable 4 rotates, it compresses the second spring 62 to store energy. When the edge of the long groove 10 rotates and contacts the guide slope 12 of the main positioning block 7, it can push the main positioning block 7 to disengage from the upper turntable 5, releasing the fixation of the upper turntable 5. At this time, the potential energy stored in the second spring 62 is released. The upper turntable 5, which has rotated halfway, and the conductive knife switch rotate rapidly, causing the conductive knife switch to close quickly. During closing, after the upper turntable 5 rotates, the positioning protrusion of the main positioning block 7 will again engage in the second positioning hole 14. It should be noted that when the conductive knife switch separates, it separates rapidly and rotates to approximately half its travel. For example, if the rotation angle of the conductive knife switch is 90 degrees, the initial angle range of rapid separation is approximately 45 degrees. The remaining 45-degree separation range is a slow rotation. When the conductive knife switch closes, the initial 45-degree rotation range is a slow rotation. When it rotates to approximately 45 degrees, the second spring 62 begins to store energy. After energy storage is complete, the remaining 45-degree rotation range is the rapid rotation closing range.

[0030] In an optional embodiment, an elastic telescopic rod 16 is fixedly connected to the outer surface of the main positioning block 7 and the secondary positioning block 8. The other end of the elastic telescopic rod 16 is fixedly connected to the fixed bracket 17. The fixed end of the fixed bracket 17 is fixedly connected to the steel frame supporting the insulating column. The elastic telescopic rod 16 can support the main positioning block 7 and the secondary positioning block 8, so that the main positioning block 7 and the secondary positioning block 8 maintain a certain elastic pressure and contact with the upper turntable 5, which is convenient for fixing the upper turntable 5 at different rotation positions. The fixed bracket 17 is installed on the steel frame supporting the insulating column to maintain the stability of the fixed bracket 17, thereby maintaining the stability of the main positioning block 7 and the secondary positioning block 8.

[0031] In an optional embodiment, the drive block 63 is rotatably connected in the arc-shaped groove inside the lower turntable 4. A plurality of balls 18 are installed on the drive block 63. The balls 18 on the drive block 63 can reduce the rotational resistance of the drive block 63 in the arc-shaped groove, making the drive block 63 smoother in the process of driving the upper turntable 5 to rotate. This prevents the drive block 63 from getting stuck in the arc-shaped groove or from affecting the release of the elastic potential energy of the first spring 61 or the second spring 62 after compression due to the large friction of the drive block 63 in the arc-shaped groove.

[0032] In an optional embodiment, a sleeve 19 and a rotating seat 20 are installed on the transmission rod 3 connected to the upper turntable 5. The sleeve 19 is fixedly installed on the steel frame supporting the insulating column. The sleeve 19 can support the upper turntable 5 and the transmission rod 3 connected to the upper turntable 5, and maintain the stability of the upper turntable 5. It should be noted that the sleeve 19 and the rotating seat 20 can be replaced by bearings. On the one hand, the transmission rod 3 on the upper turntable 5 can also be fixed, and on the other hand, the friction force when the transmission rod 3 rotates can be reduced.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission structure for a high-voltage disconnector, comprising a worm gear (1), a worm wheel (2), and a transmission rod (3), characterized in that: The transmission rod (3) is equipped with a lower turntable (4) and an upper turntable (5) that can cooperate in transmission. The inner side of the lower turntable (4) is provided with an elastic component (6) that can store energy when rotating. The elastic component (6) includes a first spring (61), a second spring (62) and a drive block (63) fixedly connected to the bottom of the upper turntable (5). The drive block (63) is installed at the junction of the first spring (61) and the second spring (62). After the energy stored in the elastic component (6) is released, it can push the upper turntable (5) to rotate quickly.

2. The transmission structure of a high-voltage disconnector according to claim 1, characterized in that: The outer side of the upper turntable (5) is provided with a main positioning block (7) and a secondary positioning block (8) that can limit the power storage position of the upper turntable (5). The lower turntable (4) is fixedly installed with an annular ring (9) that can push the main positioning block (7) and the secondary positioning block (8) away from the upper turntable (5).

3. The transmission structure of a high-voltage disconnector according to claim 2, characterized in that: The first spring (61) and the second spring (62) are installed in the arc-shaped groove in the lower turntable (4). When the position of the upper turntable (5) is limited by the main positioning block (7) or the secondary positioning block (8), the lower turntable (4) can compress the first spring (61) and the second spring (62) to store energy in the state of clockwise or counterclockwise rotation.

4. The transmission structure of a high-voltage disconnector according to claim 2 or 3, characterized in that: The annular ring (9) has a long groove (10) that does not drive the upper turntable (5) to rotate when rotating and provides energy storage stroke for compressing the first spring (61) or the second spring (62). A short groove (11) is provided on the adjacent side of the long groove (10) for the secondary positioning block (8) to engage with the upper turntable (5).

5. The transmission structure of a high-voltage disconnector according to claim 4, characterized in that: Guide slopes (12) are provided on both sides of the main positioning block (7) and the secondary positioning block (8) in the area where they contact the annular ring (9).

6. The transmission structure of a high-voltage disconnector according to claim 5, characterized in that: The upper turntable (5) is provided with a first positioning hole (13), a second positioning hole (14) and a third positioning hole (15) that cooperate with the positioning protrusions of the main positioning block (7) and the auxiliary positioning block (8). When the high-voltage disconnecting switch is closed, the positioning protrusion of the main positioning block (7) is embedded inside the second positioning hole (14).

7. The transmission structure of a high-voltage disconnector according to claim 2, characterized in that: An elastic telescopic rod (16) is fixedly connected to the outer surface of the main positioning block (7) and the auxiliary positioning block (8). The other end of the elastic telescopic rod (16) is fixedly connected to the fixed bracket (17). The fixed end of the fixed bracket (17) is fixedly connected to the steel frame supporting the insulating column.

8. The transmission structure of a high-voltage disconnector according to claim 1, characterized in that: The drive block (63) is rotatably connected in the arc-shaped groove inside the lower turntable (4), and several balls (18) are installed on the drive block (63).

9. The transmission structure of a high-voltage disconnector according to claim 1, characterized in that: A sleeve (19) and a rotating seat (20) are installed on the transmission rod (3) connected to the upper turntable (5). The sleeve (19) is fixedly installed on the steel frame supporting the insulating column.

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