Vacuum on-load tap-changer with stable base

Abstract

The utility model provides a vacuum on-load tap-changer with a stable pedestal, and relates to the technical field of vacuum on-load tap-changer stabilization, the vacuum on-load tap-changer comprises a tap-changer main body and a pedestal, the bottom surface of the pedestal is rotatably connected with a mounting rail, the surface of the mounting rail is provided with a plurality of connecting seats which are annularly distributed around the center of the pedestal, and the connecting seats are connected with the pedestal through a rotating sleeve. By adjusting the relative positions of the anti-skid balls, the inclination of the distribution positions of the anti-skid balls corresponds to the inclination of the installation position and the anti-skid balls and the installation position are oppositely arranged, so that the anti-skid balls are utilized to be in contact with the ground during follow-up installation; the base is installed on the inclined bottom face in a horizontal state through compensation between the inclined faces.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum on-load tap changer stabilization, in particular to a vacuum on-load tap changer with a stable base. Background Art

[0002] The vacuum on-load tap-changer is a combined on-load tap-changer. Its switching switch adopts vacuum switching technology. It is suitable for power transformers or industrial transformers with a maximum voltage of 40.5kV-252kV, a maximum rated through-current of 600A for three-phase and 1500A for single-phase, and a frequency of 50Hz and 60Hz. During installation, the corresponding stabilizing device needs to be used to fix the position.

[0003] A dry-type on-load tap changer with a stable base, with publication number CN213815869U, is provided with a fixing plate, a groove and a protective cover, and the protective cover can be installed in an inlaid manner through the groove fixing plate, which is convenient for later disassembly and assembly to maintain the equipment inside the device. The protective cover can protect the device to avoid damage caused by collision with other objects during use. The connecting rod and the main body are provided, and the fixing plate can support and fix the main body through the connecting rod. The rubber pad, bolts and base are provided, and the fixing plate can be connected to the base through the rubber pad. When the device is vibrated by other objects, the rubber pad can absorb the shock force, avoiding the displacement of the equipment inside the device due to the shock force, thereby enhancing the stability of the device, and the base can be installed and fixed with other equipment through bolts.

[0004] However, during actual installation, due to the influence of the terrain, when the tap changer needs to be installed in a location with uneven terrain or a slope, since its base is a rigid structure, if it is placed directly on such a terrain, the base and the tap changer itself will also tilt. This situation will have a certain impact on the stability of the tap changer. The tilted base may cause uneven force on the various components of the tap changer, thereby affecting its normal operation. Utility Model Content

[0005] The purpose of the utility model is to solve the problems in the prior art and to propose a vacuum on-load tap changer with a stable base.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a vacuum on-load tap changer with a stable base, comprising a tap changer body and a base, the bottom surface of the base being rotatably connected to a mounting rail, the surface of the mounting rail being installed with a plurality of connecting seats distributed in a ring around the center of the base, the bottom surface of the connecting seat being fixedly connected to a screw rod, the screw rod being threadedly connected to a sleeve arranged perpendicular to the bottom surface of the base, the bottom end of the sleeve being installed with an anti-slip ball, a clamping ring being installed between the plurality of the sleeves, the upper surface of the clamping ring being hollowed out, and a clamping block being inserted into the outer edge of the clamping ring at the position of each sleeve, each of the clamping blocks being sleeved on the sleeve at the corresponding position and one side of the bottom edge of the clamping block extending outward through the hollow part of the clamping ring surface.

[0007] Preferably, the clamping block passes through the hollowed-out extension of the clamping ring and has a thread on its surface, and is threadedly connected to a nut.

[0008] Preferably, a worm gear ring coaxial with the mounting rail is fixedly connected to the bottom surface of the base, a sliding seat is inserted into one side of the top end of the mounting rail, and a worm engaged with the worm gear ring is rotatably connected in the sliding seat.

[0009] Preferably, a motor is fixedly mounted on one side of the sliding seat and is used to drive the worm to rotate, and an electric push rod is fixedly connected to the sliding seat between the adjacent side of the motor and the side of the mounting rail.

[0010] Preferably, the bottom edge of the base is rotatably connected to a number of sprockets distributed in a circular array, a chain is meshed between the sprockets and a threaded rod is fixedly connected to the bottom end of each sprocket, a threaded sleeve is threaded on the threaded rod, and the bottom ends of the threaded sleeves are connected to support seats.

[0011] Preferably, two gears are provided below the base at the position of one of the threaded rods and a motor is also fixedly installed. The two gears are respectively fixed to the motor main shaft on the base and one of the threaded rods and the two gears are meshed and connected.

[0012] Preferably, the plurality of sprockets are arranged outside the mounting rail.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the utility model, the sleeve is rotated to drive the anti-skid balls to rise and fall, and the relative positions of the anti-skid balls are adjusted so that the inclination of the distribution positions of the anti-skid balls corresponds to the inclination of the installation positions and is set in reverse. This facilitates the subsequent installation by using the anti-skid balls to contact the ground, and the base is installed in a horizontal state on the inclined bottom surface through compensation of the inclined surfaces.

[0015] 2. In the present invention, by the connection of the sprocket and the chain, the simultaneous rotation of several threaded rods can be achieved, and the simultaneous lowering of several threaded sleeves can be achieved, and the lowering of the support seat can be achieved. The device position is initially fixed by the support seat lowering and contacting the ground, and then the relative positions of the several sleeves are adjusted by rotation. After the relative positions of the several sleeves are adjusted, the sprocket is rotated in the opposite direction to achieve the threaded sleeve driving the support seat toward the base until the several anti-slip balls contact the ground and the support seat is separated from the ground, thereby achieving the inclination adjustment of the base and the tap changer body, ensuring safety during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention provides a schematic diagram of the three-dimensional structure of a vacuum on-load tap-changer with a stable base;

[0017] Figure 2 This utility model proposes a vacuum on-load tap changer with a stable base Figure 1 Schematic diagram of the top cross-section structure;

[0018] Figure 3 This utility model proposes a vacuum on-load tap changer with a stable base Figure 2 Schematic diagram of the side section structure;

[0019] Figure 4 for Figure 3 Schematic diagram of the side structure.

[0020] Legend: 1. Tap changer body; 2. Base; 3. Support seat; 4. Threaded sleeve; 5. Sprocket; 6. Threaded rod; 7. Chain; 8. Anti-slip ball; 9. Sleeve; 10. Gear; 11. Motor; 12. Retaining ring; 13. Connecting seat; 14. Screw; 15. Block; 16. Mounting rail; 17. Worm gear ring; 18. Worm; 19. Electric push rod; 20. Sliding seat. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0023] like Figure 1-4As shown, a vacuum on-load tap changer with a stable base includes a tap changer body 1 and a base 2. The bottom surface of the base 2 is rotatably connected to a mounting rail 16. The surface of the mounting rail 16 is provided with a plurality of connecting seats 13 distributed in a ring around the center of the base 2. The bottom surface of the connecting seat 13 is fixedly connected to a screw rod 14. The screw rod 14 is threadedly connected to a sleeve 9 arranged perpendicular to the bottom surface of the base 2. The bottom end of the sleeve 9 is provided with an anti-skid ball 8. When in use, according to the inclination of the bottom surface of the installation position of the tap changer body 1, the sleeve 9 is rotated, and the sleeve 9 drives the anti-skid ball 8 to rise and fall. By adjusting the relative positions of the plurality of anti-skid balls 8, the inclination of the distribution position of the plurality of anti-skid balls 8 corresponds to the inclination of the installation position and is arranged in the opposite direction, so that during subsequent installation, the plurality of anti-skid balls 8 can be used to contact the ground. By compensating the inclined surfaces, the base 2 can be installed in a horizontal state on the inclined bottom surface. In addition, the rotatably installed mounting rail 16 can be installed after the base 2 is first placed. By rotating the mounting rail 16, the several sleeves 9 whose relative positions have been adjusted are aligned with the ground, and a snap ring 12 is installed between the several sleeves 9. The upper surface of the snap ring 12 is hollowed out, and a block 15 is inserted at the position of each sleeve 9 on the outer side of the snap ring 12. Each block 15 is sleeved on the sleeve 9 at the corresponding position and one side of the bottom edge of the block 15 extends outward through the hollow part of the snap ring 12 surface. The block 15 is threaded on the surface of the extension of the hollow of the snap ring 12, and the thread is connected with a nut. The block 15 is connected by the nut to achieve the relative position of the block 15 and the snap ring 12. Therefore, the relative position of the several sleeves 9 and the snap ring 12 is fixed by the set snap ring 12, and then the relative position of the several sleeves 9 is fixed, that is, stability is guaranteed. In addition, the utility model provides another solution, that is, installing a steel plate on the inclined bottom surface, and fixing the relative position of the anti-slip ball 8 and the steel plate by welding to achieve stable fixation of the device.

[0024] Furthermore, a worm gear ring 17 concentric with the mounting rail 16 is fixedly connected to the bottom surface of the base 2, a sliding seat 20 is inserted into one side of the top of the mounting rail 16, a worm 18 engaged with the worm gear ring 17 is rotatably connected to the sliding seat 20, a motor 11 is fixedly mounted on one side of the sliding seat 20, and is used to drive the worm 18 to rotate, and an electric push rod 19 is fixedly connected to the sliding seat 20 between the adjacent side of the motor 11 and the side of the mounting rail 16:

[0025] In actual use, when the position of the mounting rail 16 is rotated to adjust the position, the worm 18 and the worm wheel ring 17 are in a non-contact state, that is, the mounting rail 16 can drive the worm 18 on its surface to rotate. After the position of the mounting rail 16 is adjusted, the motor 11 of this scheme is used to drive the worm 18 to rotate so that the spiral groove on the surface of the worm 18 is aligned with the helical teeth on the surface of the worm wheel ring 17. Then, the electric push rod 19 is extended to enable the sliding seat 20 to drive the worm 18 to move until it engages with the surface of the worm wheel ring 17 to prevent the mounting rail 16 from rotating, thereby achieving the fixed relative positions of the base 2, the tap changer body 1 and the mounting rail 16.

[0026] Further: the bottom edge of the base 2 is rotatably connected to a plurality of sprockets 5 distributed in a ring array, a chain 7 is meshed between the plurality of sprockets 5, and a threaded rod 6 is fixedly connected to the bottom end of each sprocket 5, a threaded sleeve 4 is threadedly connected to the threaded rod 6, and the bottom ends of the plurality of threaded sleeves 4 are connected to the support base 3. Two gears 10 are provided below the base 2 at the position of one of the threaded rods 6 and a motor 11 is also fixedly installed. The two gears 10 are respectively fixed to the main shaft of the motor 11 on the base 2 and one of the threaded rods 6, and the two gears 10 are meshed and connected. The plurality of sprockets 5 are arranged on the outside of the mounting rail 16:

[0027] In actual use, the motor 11 in this scheme is used to drive the gear 10 of its main shaft to rotate, and under the action of meshing connection and fixed connection, another gear 10 drives the corresponding threaded rod 6 to rotate. Under the connection action of the sprocket 5 and the chain 7, the sprocket 5 at other positions drives the threaded rod 6 at the corresponding position to rotate, so that several threaded sleeves 4 can be lowered at the same time, and the support seat 3 can be lowered. When in use, the position of the device is initially fixed by first lowering the support seat 3 to contact the ground, and then the relative positions of several sleeves 9 are rotated to adjust. After the relative positions of several sleeves 9 are adjusted, the sprocket 5 is rotated in the opposite direction to realize the threaded sleeve 4 driving the support seat 3 to approach the base 2 until several anti-slip balls 8 touch the ground and the support seat 3 is separated from the ground, thereby realizing the inclination adjustment of the base 2 and the tap changer body 1.

[0028] Working principle: install the tap changer body 1 on the base 2, and then use the support seat 3 to move it under the anti-slip balls 8, and the support seat 3 contacts the ground to realize the preliminary installation of the base 2 and the tap changer body 1. At this time, the tap changer body 1 and the base 2 are in an inclined state. According to the inclination, rotate the sleeve 9, and then realize that the sleeve 9 drives the anti-slip balls 8 to rise and fall. By adjusting the relative positions of the anti-slip balls 8, the inclination of the distribution position of the anti-slip balls 8 corresponds to the inclination of the installation position and is set in reverse. Then rotate the mounting rail 16 to realize compensation of the adjusted anti-slip balls 8 with the ground inclination, and then rotate the sprocket 5 in the opposite direction to realize the threaded sleeve 4 driving the support seat 3 toward the base 2 until the anti-slip balls 8 contact the ground and the support seat 3 is separated from the ground, thereby realizing the inclination adjustment of the base 2 and the tap changer body 1.

[0029] The wiring diagram of the tap changer body 1, the motor 11, and the electric push rod 19 in the present invention is common knowledge in the art. The working principle thereof is a well-known technology. The models thereof are selected appropriately according to actual use. Therefore, the control method and wiring arrangement of the tap changer body 1, the motor 11, and the electric push rod 19 will not be explained in detail.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A vacuum on-load tap changer with a stable base, comprising a tap changer body (1) and a base (2), characterized in that: The bottom surface of the base (2) is rotatably connected to a mounting rail (16); The surface of the mounting rail (16) is provided with a plurality of connecting seats (13) distributed in an annular manner around the center of the base (2), and the bottom surface of the connecting seat (13) is fixedly connected to a screw rod (14); The screw rod (14) is threadedly connected to a sleeve (9) arranged perpendicular to the bottom surface of the base (2), an anti-slip ball (8) is installed at the bottom end of the sleeve (9), a snap ring (12) is installed between several of the sleeves (9), the upper surface of the snap ring (12) is hollow, and a clamping block (15) is inserted at the outer edge of the snap ring (12) at the position of each sleeve (9); Each of the clamping blocks (15) is sleeved on the sleeve (9) at a corresponding position, and one side of the bottom edge of the clamping block (15) extends outwards and penetrates the hollow portion of the surface of the clamping ring (12).

2. The vacuum on-load tap-changer with a stable base according to claim 1, characterized in that: The clamping block (15) passes through the hollowed-out extension of the clamping ring (12) and has a threaded surface, and is threadedly connected to a nut.

3. The vacuum on-load tap-changer with a stable base according to claim 1, characterized in that: The bottom surface of the base (2) is fixedly connected to a worm wheel ring (17) which is coaxial with the mounting rail (16); a sliding seat (20) is inserted into one side of the top end of the mounting rail (16); and a worm (18) which engages with the worm wheel ring (17) is rotatably connected in the sliding seat (20).

4. The vacuum on-load tap-changer with a stable base according to claim 3, characterized in that: A motor (11) is fixedly mounted on one side of the sliding seat (20) and is used to drive the worm (18) to rotate, and an electric push rod (19) is fixedly connected between the sliding seat (20) and the side of the mounting rail (16) adjacent to the motor (11).

5. The vacuum on-load tap-changer with a stable base according to claim 1, characterized in that: The bottom edge of the base (2) is rotatably connected to a plurality of sprockets (5) distributed in a ring array, a chain (7) is meshedly connected between the plurality of sprockets (5), and the bottom end of each sprocket (5) is fixedly connected to a threaded rod (6), a threaded sleeve (4) is threadedly connected to the threaded rod (6), and the bottom ends of the plurality of threaded sleeves (4) are connected to a support seat (3).

6. The vacuum on-load tap-changer with a stable base according to claim 5, characterized in that: Two gears (10) are provided below the base (2) at the position of one of the threaded rods (6), and a motor (11) is also fixedly installed thereon. The two gears (10) are respectively fixed to the main shaft of the motor (11) on the base (2) and one of the threaded rods (6), and the two gears (10) are meshed and connected.

7. The vacuum on-load tap-changer with a stable base according to claim 5, characterized in that: The plurality of sprockets (5) are arranged outside the mounting rail (16).

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