A high-voltage switch cabinet bus grounding device

Abstract

The application discloses a high-voltage switch cabinet bus grounding device, which comprises an insulating rod, a movable contact, a fixed ring, a plurality of contact plates, an expansion mechanism and a contraction mechanism. The movable contact is arranged in correspondence with a static contact on a bus. The fixed ring is detachably connected to the top end of the insulating rod. The outer wall of the fixed ring is axially hingedly connected with the plurality of contact plates. The contact plates are in contact with the static contact on the bus. The expansion mechanism is arranged on the fixed ring and is used for controlling the expansion of the contact plates. The contraction mechanism is arranged on the outer wall of the contact plates and is used for controlling the retraction of the plurality of contact plates. The movable contact can be applied to different static contacts, thereby improving the application range of the device. Meanwhile, the device is simple to operate and convenient to carry.

Description

Technical Field

[0001] This invention relates to the field of switchgear busbar grounding technology, and in particular to a high-voltage switchgear busbar grounding device. Background Technology

[0002] Currently, common bus grounding methods for high-voltage indoor switchgear include hanging grounding devices and grounding trolleys. Hanging grounding devices require reliable grounding on the exposed busbars. However, switchgear busbars are often equipped with insulating sheaths, making it impossible to directly install grounding wires. Currently, relying on this method requires removing the insulating sheaths before installing the grounding wires. After maintenance, the grounding wires are removed, and then a way is found to install the removed insulating sheaths. This operation method is time-consuming and has safety risks. In daily work, maintenance personnel often use the principle of directly connecting the PT truck (isolation truck) to the busbar. After pulling out the PT truck, the grounding truck is pushed in. However, the existing busbar grounding trucks for switchgear can no longer meet the requirements in some cases: (1) After the PT bay truck is pulled out and the grounding truck is pushed in, maintenance personnel cannot inspect the PT bay; (2) When a section of the busbar is de-energized for maintenance, if any truck is faulty and cannot be pulled out, due to the interlocking function, the grounding truck cannot be pushed into the PT bay, and the grounding operation cannot be completed; (3) With the expansion of the power grid, the number of switchgear is constantly increasing, and the demand for busbar grounding during switchgear maintenance is increasing. The maintenance personnel's demand for reliable grounding of the switchgear busbar is becoming increasingly strong; (4) The method of using the existing grounding truck to achieve busbar grounding takes a long time. The average time in the past two years is 20 minutes. Based on the above problems, a set of special tools for busbar grounding that is suitable for various types of switchgear, easy to operate, highly portable, and can effectively realize the functions of voltage detection and grounding is developed. Summary of the Invention

[0003] The purpose of this invention is to provide a bus grounding device for high-voltage switchgear to solve the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a high-voltage switchgear busbar grounding device, comprising:

[0005] Insulating rod;

[0006] The moving contact is provided in correspondence with the stationary contact on the busbar. The moving contact includes a fixed ring, which is detachably connected to the top of the insulating rod. The outer wall of the fixed ring is axially hinged with a plurality of contact plates at equal intervals. The contact plates are in contact with the stationary contact on the busbar.

[0007] An expansion mechanism is provided on the fixed ring and is used to control the expansion of the contact plate.

[0008] A retraction mechanism is disposed on the outer wall of the contact plate, and the retraction mechanism is used to control the retraction of the contact plates.

[0009] According to the high-voltage switchgear bus grounding device provided by the present invention, an installation ring is coaxially fixedly provided at the top end of the insulating rod, a positioning groove is provided on one side of the installation ring, and a strong magnetic block is fixedly connected to one side of the fixing ring, and the strong magnetic block is magnetically connected to the positioning groove.

[0010] According to the high-voltage switchgear busbar grounding device provided by the present invention, the expansion mechanism includes a fixed sleeve threadedly connected to the inner wall of the fixed ring, one end of the fixed sleeve extending out of the fixed ring, and a plurality of sliding grooves evenly spaced on the outer wall of the fixed sleeve, the axis of the sliding groove being parallel to the axis of the fixed sleeve, a slider being slidably connected within the sliding groove, a push rod being hinged to the top of the slider, one end of the push rod being hinged to the inner wall of the contact plate, and the axis of the push rod being set at an angle to the axis of the insulating rod, and a control part being provided on the insulating rod, the control part being used to control the slider to slide within the sliding groove.

[0011] According to the high-voltage switchgear busbar grounding device provided by the present invention, the control unit includes a limiting block, which is slidably disposed in the slide groove. The limiting block is correspondingly disposed with the slider. A through hole is provided on the limiting block, and a threaded sleeve is rotatably connected in the through hole. A threaded rod is fixedly connected to one side of the slider, and the threaded rod is correspondingly disposed with the threaded sleeve. A plurality of sliding holes are equally spaced around the circumference of the insulating rod, and a sliding rod is slidably connected in the sliding holes. One end of the sliding rod is fixedly connected to the threaded sleeve, and the other end of the sliding rod is fixedly connected to a driven gear. A manual adjustment component is provided at the end of the insulating rod, and the manual adjustment component is in transmission cooperation with the driven gear.

[0012] According to the high-voltage switchgear bus grounding device provided by the present invention, the manual adjustment assembly includes an adjustment sleeve slidably sleeved on the end of the insulating rod, a drive gear is coaxially fixedly connected inside the adjustment sleeve, a plurality of driven gears mesh with the drive gear, a nut is threadedly connected to the outer wall of the insulating rod, and one end of the adjustment sleeve is rotatably connected to one side of the nut.

[0013] According to the high-voltage switchgear bus grounding device provided by the present invention, the cross-sectional shape of the slide groove is T-shaped, and the slider and the limiting block are adapted to the shape of the limiting through groove.

[0014] According to the high-voltage switchgear bus grounding device provided by the present invention, the retraction mechanism includes a plurality of annular springs, and a plurality of annular grooves are formed on the outer wall of the contact plate along the axial direction, and the annular springs are respectively disposed in the annular grooves.

[0015] According to the high-voltage switchgear bus grounding device provided by the present invention, the outer wall of the fixed sleeve, the inside of the sliding groove, the limiting block, and the slider are all coated with an insulating coating.

[0016] The present invention discloses the following technical effects:

[0017] In use, the moving contact is fixed to the top of the insulating rod, and then the moving contact is sent to the stationary contact on the busbar through the insulating rod. Then, the contact plate is expanded by the expansion mechanism to facilitate the engagement of the moving contact and the stationary contact. When the stationary contact extends into the middle of the contact plate, the expansion mechanism retracts its force, and under the action of the contraction mechanism, the end of the expansion plate retracts and engages with the stationary contact, thus completing the engagement of the moving contact and the stationary contact.

[0018] The moving contact of this invention can be applied to different stationary contacts, which improves the applicability of the device. At the same time, the device is simple to operate and easy to carry. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the high-voltage switchgear bus grounding device of the present invention;

[0021] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram illustrating the mating relationship between the fixing ring and the mounting ring of the present invention;

[0023] Figure 4 This is a cross-sectional view of the fixing sleeve of the present invention;

[0024] Figure 5 This is a cross-sectional view of the insulating rod of the present invention;

[0025] Figure 6 This is a schematic diagram of the shrinkage mechanism of the present invention.

[0026] The components are as follows: 1. Insulating rod; 2. Fixing ring; 3. Contact plate; 4. Mounting ring; 5. Fixing sleeve; 6. Slide groove; 7. Slider; 8. Push rod; 9. Limiting block; 10. Threaded sleeve; 11. Threaded rod; 12. Sliding hole; 13. Sliding rod; 14. Driven gear; 15. Adjusting sleeve; 16. Drive gear; 17. Nut; 18. Ring spring; 19. Ring groove; 20. Strong magnetic block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figure 1-6 This invention provides a high-voltage switchgear busbar grounding device, comprising:

[0030] Insulating rod 1;

[0031] The moving contact is configured to correspond to the stationary contact on the busbar. The moving contact includes a fixed ring 2, which is detachably connected to the top of the insulating rod 1. Several contact plates 3 are axially hinged at equal intervals on the outer wall of the fixed ring 2. The contact plates 3 are in contact with the stationary contact on the busbar.

[0032] An expansion mechanism is installed on the fixed ring 2 and is used to control the expansion of the contact plate 3.

[0033] A retraction mechanism is installed on the outer wall of the contact plate 3. The retraction mechanism is used to control the retraction of several contact plates 3.

[0034] In use, the moving contact is fixed to the top of the insulating rod 1. Then, the moving contact is sent to the stationary contact on the busbar through the insulating rod 1. Then, the contact plate 3 is expanded by the expansion mechanism to facilitate the engagement of the moving contact and the stationary contact. When the stationary contact extends into the middle of the contact plate 3, the expansion mechanism retracts its force. Under the action of the contraction mechanism, the end of the expansion plate retracts and engages with the stationary contact, thus completing the engagement of the moving contact and the stationary contact.

[0035] The moving contact of this invention can be applied to different stationary contacts, which improves the applicability of the device. At the same time, the device is simple to operate and easy to carry.

[0036] To further optimize the design, an installation ring 4 is coaxially fixed at the top of the insulating rod 1. A positioning groove is provided on one side of the installation ring 4. A strong magnetic block 20 is fixedly connected to one side of the fixing ring 2. The strong magnetic block 20 is magnetically connected to the positioning groove.

[0037] The strong magnetic block 20 uses an electromagnet. The connection or separation between the moving contact and the insulating rod 1 is controlled by the on and off state of the electromagnet. At the same time, the positioning groove and the strong magnetic block 20 can position the moving contact and the insulating rod 1, which facilitates the assembly of the moving contact and the insulating rod 1.

[0038] Further optimization of the scheme: the expansion mechanism includes a fixed sleeve 5 threaded to the inner wall of the fixed ring 2, one end of the fixed sleeve 5 extending out of the fixed ring 2, and a plurality of sliding grooves 6 evenly spaced around the outer wall of the fixed sleeve 5. The axis of the sliding grooves 6 is parallel to the axis of the fixed sleeve 5. A slider 7 is slidably connected in the sliding groove 6, and a push rod 8 is hinged to the top of the slider 7. One end of the push rod 8 is hinged to the inner wall of the contact plate 3, and the axis of the push rod 8 is set at an angle to the axis of the insulating rod 1. A control part is provided on the insulating rod 1, which is used to control the slider 7 to slide in the sliding groove 6.

[0039] The scheme is further optimized. The control unit includes a limit block 9, which is slidably set in the slide groove 6. The limit block 9 is correspondingly set with the slider 7. A through hole is opened on the limit block 9, and a threaded sleeve 10 is rotatably connected in the through hole. A threaded rod 11 is fixedly connected to one side of the slider 7. The threaded rod 11 is correspondingly set with the threaded sleeve 10. A number of sliding holes 12 are opened circumferentially at equal intervals. A sliding rod 13 is slidably connected in the sliding holes 12. One end of the sliding rod 13 is fixedly connected to the threaded sleeve 10, and the other end of the sliding rod 13 is fixedly connected to the driven gear 14. A manual adjustment component is set at the end of the insulating rod 1. The manual adjustment component is in transmission cooperation with the driven gear 14.

[0040] The scheme is further optimized. The manual adjustment component includes an adjustment sleeve 15 that is slidably sleeved on the end of the insulating rod 1. A drive gear 16 is coaxially fixedly connected inside the adjustment sleeve 15. Several driven gears 14 are meshed with the drive gear 16. A nut 17 is threadedly connected to the outer wall of the insulating rod 1. One end of the adjustment sleeve 15 is rotatably connected to one side of the nut 17.

[0041] Simultaneously rotating the adjusting sleeve 15 and nut 17 drives the driven gear 14 to rotate via the drive gear 16, thereby controlling the rotation of the threaded sleeve 10. The T-shaped slide groove 6, in conjunction with the reverse pressure of the ring spring 18, limits the limit block 9 and the slider 7, so that the threaded sleeve 10 is threadedly connected to the threaded rod 11. Then, rotating the nut 17 pulls the adjusting sleeve 15 to feed along the axial direction of the insulating rod 1, thereby pushing the push rod 8 to move via the slide rod 13, the limit block 9, and the slider 7. The push rod 8 pushes the contact plate 3 to expand, making it easier for the contact plate 3 to contact the stationary contact.

[0042] Further optimization of the design: the cross-sectional shape of the slide groove 6 is T-shaped, and the shapes of the slider 7 and the limiting block 9 are adapted to the shape of the limiting through groove. Setting the slide groove 6 as T-shaped facilitates the limiting of the slider 7 and the limiting block 9.

[0043] Further optimization of the design involves a retraction mechanism comprising several annular springs 18. Several annular grooves 19 are formed along the axial direction on the outer wall of the contact plate 3, and the annular springs 18 are respectively disposed within these grooves. The annular springs 18 are in a constantly stretched state. Simultaneously, the depth of the annular grooves 19 needs to be considered; the depth of the annular grooves 19 must be greater than 2 / 3 of the diameter of the annular springs 18 to ensure that the annular grooves 19 have a strong restraining effect on the annular springs 18, preventing them from falling off. The annular springs 18 are positioned far from the fixing ring 2, thereby better controlling the retraction of the end of the contact plate 3.

[0044] The design was further optimized by coating the outer wall of the fixed sleeve 5, the inside of the slide groove 6, the limiting block 9, and the slider 7 with an insulating coating. The insulating coating prevents the slide rod 13 and other devices from becoming conductive, thus improving the safety performance of the device. The insulating coating uses existing resin varnish or other directly sprayable paints. At the same time, the push rod 8 and the fixed ring 2 are also coated with paint to ensure the safety performance of the device.

[0045] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0046] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A busbar grounding device for a high-voltage switchgear, characterized in that, include: Insulating rod (1); The moving contact is provided in correspondence with the stationary contact on the busbar. The moving contact includes a fixed ring (2). The fixed ring (2) is detachably connected to the top of the insulating rod (1). The outer wall of the fixed ring (2) is axially hinged with several contact plates (3) at equal intervals. The contact plates (3) are in contact with the stationary contact on the busbar. An expansion mechanism is provided on the fixed ring (2) and is used to control the expansion of the contact plate (3); A retraction mechanism is provided on the outer wall of the contact plate (3) and is used to control the retraction of a plurality of the contact plates (3); The expansion mechanism includes a fixed sleeve (5) threaded to the inner wall of the fixed ring (2), one end of the fixed sleeve (5) extending out of the fixed ring (2), and a plurality of sliding grooves (6) evenly spaced around the outer wall of the fixed sleeve (5). The axis of the sliding groove (6) is parallel to the axis of the fixed sleeve (5). A slider (7) is slidably connected in the sliding groove (6). A push rod (8) is hinged to the top of the slider (7). One end of the push rod (8) is hinged to the inner wall of the contact plate (3), and the axis of the push rod (8) is set at an angle to the axis of the insulating rod (1). A control part is provided on the insulating rod (1), and the control part is used to control the slider (7) to slide in the sliding groove (6). The control unit includes a limiting block (9), which is slidably disposed in the slide groove (6). The limiting block (9) is correspondingly disposed with the slider (7). A through hole is provided on the limiting block (9), and a threaded sleeve (10) is rotatably connected in the through hole. A threaded rod (11) is fixedly connected to one side of the slider (7). The threaded rod (11) is correspondingly disposed with the threaded sleeve (10). A plurality of sliding holes (12) are equally spaced around the insulating rod (1). A sliding rod (13) is slidably connected in the sliding holes (12). One end of the sliding rod (13) is fixedly connected to the threaded sleeve (10), and the other end of the sliding rod (13) is fixedly connected to a driven gear (14). A manual adjustment component is provided at the end of the insulating rod (1). The manual adjustment component is in transmission cooperation with the driven gear (14). The retraction mechanism includes several annular springs (18), and several annular grooves (19) are provided on the outer wall of the contact plate (3) along the axial direction. The annular springs (18) are respectively arranged in the annular grooves (19).

2. The high-voltage switchgear busbar grounding device according to claim 1, characterized in that: An installation ring (4) is coaxially fixed at the top of the insulating rod (1). A positioning groove is provided on one side of the installation ring (4). A strong magnetic block (20) is fixedly connected to one side of the fixing ring (2). The strong magnetic block (20) is magnetically connected to the positioning groove.

3. A high-voltage switchgear busbar grounding device according to claim 1, characterized in that: The manual adjustment assembly includes an adjustment sleeve (15) that is slidably sleeved on the end of the insulating rod (1). A drive gear (16) is coaxially fixedly connected inside the adjustment sleeve (15). Several driven gears (14) mesh with the drive gear (16). A nut (17) is threadedly connected to the outer wall of the insulating rod (1). One end of the adjustment sleeve (15) is rotatably connected to one side of the nut (17).

4. A high-voltage switchgear busbar grounding device according to claim 1, characterized in that: The slide (6) has a T-shaped cross-section, and the slider (7) and the limiting block (9) are both adapted to the shape of the slide (6).

5. A high-voltage switchgear busbar grounding device according to claim 1, characterized in that: The outer wall of the fixed sleeve (5), the inside of the sliding groove (6), the limiting block (9), and the slider (7) are all coated with an insulating coating.

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