Automatic pressure spring device for closing resistor

Abstract

The utility model relates to an automatic pressure spring device for a closing resistor, which comprises a top plate, a support plate positioned at the lower end of the top plate, and a plurality of springs of which the two ends are respectively in contact connection with the top plate and the support plate, the multiple rotating rods are synchronously connected to the supporting plate in a sliding mode in the height direction. When the device is used, the top plate and the supporting plate are connected through the rotating rods, so that the top plate and the supporting plate extrude the springs, installation is convenient, meanwhile, the rotating rods play a guiding role in stretching and retracting of the springs, the springs stretch and retract synchronously due to the fact that the rotating rods slide synchronously, the top plate is stressed synchronously, and the service life of the device is prolonged. And the damage to the closing spring is reduced.

Description

Technical Field

[0001] This utility model relates to the field of high voltage circuit breaker structure installation and maintenance technology, and in particular to an automatic spring device for closing resistor. Background Technology

[0002] For power grids with voltage levels of 363kV and above, when closing long unloaded lines, especially when the power supply voltage amplitude is out of phase with the line residual voltage, the sudden change in system parameters causes oscillations in the electromagnetic energy of the power grid, resulting in a large overvoltage. To limit this closing overvoltage, a closing resistor is often installed at the circuit breaker structure to absorb some of the electrical energy in the power grid and convert it into heat energy, thereby weakening the electromagnetic oscillation and limiting the overvoltage.

[0003] The closing resistor unit mainly consists of a resistor sheet and a spring. During installation, the closing resistor sheet and spring are compressed to facilitate the assembly of the locking ring. The existing technology involves manually and alternately turning the nuts on the spring clamping fixture to press the top plate, thereby compressing the spring. This installation method is time-consuming and labor-intensive, and the alternating turning of the nuts can cause uneven stress on the top plate, which may damage the closing spring. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing an automatic spring device for closing resistors. This device facilitates spring installation and allows the springs to extend and retract synchronously, thereby ensuring that the top plate is subjected to synchronous force and reducing damage to the closing spring.

[0005] This utility model is achieved through the following technical solution: an automatic spring device for closing resistors, including a top plate, a support plate located at the lower end of the top plate, and several springs with their two ends respectively in contact with the top plate and the support plate. The top plate is detachably connected with a rotating rod corresponding to the spring and passing through the corresponding spring. The several rotating rods slide synchronously on the support plate along the height direction.

[0006] In use, this utility model connects the top plate and the support plate with a rotating rod, thereby pressing the spring between the top plate and the support plate, which facilitates installation. At the same time, the rotating rod guides the extension and retraction of the spring. Because several rotating rods slide synchronously, several springs extend and retract synchronously, thereby causing the top plate to be subjected to force synchronously, reducing damage to the closing spring.

[0007] Preferably, the support plate is axially connected to a lead screw that is corresponding to and threadedly connected to the corresponding lead screw, and the lower end of the support plate is also provided with a drive device that drives several lead screws to rotate synchronously.

[0008] This preferred solution uses the cooperation of a lead screw and a rotating rod to allow the rotating rod to slide on the support plate while using the force between the threads to overcome the elastic force of the spring, thus fixing the spring. At the same time, it eliminates the need to add a fiber structure to restrict the sliding of the rotating rod, thereby simplifying the structure.

[0009] Preferably, the driving device includes a driven gear that is corresponding to and coaxial with the lead screw, a driving gear that is located between and meshes with the driven gears, and a motor that drives the driving gear to rotate.

[0010] This preferred solution uses a drive gear to drive several driven gears, thereby achieving synchronous rotation of several lead screws, which in turn enables synchronous sliding of several rotating rods, and thus synchronous extension and contraction of several springs.

[0011] Preferably, a gear seat is provided below the support plate, a ground support leg is provided on the bottom surface of the gear seat, and a column connected to the support plate is provided on the top surface of the gear seat. A driven wheel shaft is also axially connected to the gear seat and fixed to the corresponding driven gear. Several driven wheel shafts are located on a first circle, and the center of the first circle is located on the axis of the driving gear.

[0012] This preferred solution uses a gear seat to support the support plate, and the position of the driven gear shaft and the driving gear are arranged to allow the driven gear to rotate synchronously.

[0013] Preferably, the bottom surface of the support plate has a groove corresponding to the column.

[0014] This preferred solution uses grooves to achieve a positioning function.

[0015] Preferably, the thickness of the driven gear is less than the height between the bottom surface of the support plate and the top surface of the gear seat.

[0016] This preferred design provides space at both the top and bottom of the driven gear, thereby preventing the support plate and gear seat from interfering with the rotation of the driven gear.

[0017] Preferably, the swivel includes an external threaded portion connected to the top of the inner swivel portion, the inner swivel portion is threadedly connected to the lead screw, the external threaded portion extends upward through the top plate, and a positioning nut that contacts and connects with the top surface of the top plate is threaded onto the external threaded portion.

[0018] This preferred solution, through the setting of the positioning nut, facilitates the adjustment of the height of the part of the rotating rod located between the support plate and the top plate according to different springs, and also facilitates the adjustment of the height between the support plate and the top plate.

[0019] The beneficial effects of this utility model are as follows: The top plate and support plate are connected by a rotating rod, which allows the top plate and support plate to press against the spring, facilitating installation. Simultaneously, the rotating rod guides the spring's extension and retraction. Because several rotating rods slide synchronously, several springs extend and retract synchronously, thus causing the top plate to be subjected to synchronous force, reducing damage to the closing spring. Through the cooperation of the lead screw and rotating rod, the rotating rod slides on the support plate while the force between the threads overcomes the spring's elasticity, thus fixing the spring. This eliminates the need for additional fiber structures to restrict the rotating rod's sliding, simplifying the structure. The synchronous rotation of several lead screws, driven by a driving gear, enables the synchronous sliding of several rotating rods, thereby achieving synchronous extension and retraction of several springs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the gear housing;

[0022] Figure 3 This is a top view of the teeth of the driving gear and the driven gear;

[0023] Figure 4 This is a schematic diagram of the rotary rod;

[0024] As shown in the figure:

[0025] 1. Gear seat, 2. Drive unit, 3. Motor, 4. Support plate, 5. Lead screw, 6. Rotary rod, 7. Top plate, 8. Positioning bolt, 11. Body, 12. Ground support leg, 13. Drive wheel transmission hole, 14. Column, 15. Driven wheel shaft, 21. Drive gear, 22. Driven gear, 61. Internal rotating part, 62. External threaded part. Detailed Implementation

[0026] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to describe the solution.

[0027] See attached document Figure 1-4 The present invention relates to an automatic spring device for closing resistors, comprising a gear seat 1, a support plate 4, and a top plate 7 arranged sequentially from bottom to top along the height direction.

[0028] The gear base 1 includes a body 11. The bottom surface of the body 11 is provided with ground support legs 12 supporting the body 11. The top surface of the body 11 is provided with columns 14 supporting support plates 4. The bottom surface of the support plates 4 is provided with grooves that cooperate with the columns 14. There are three columns 14, which are evenly arranged circumferentially. The top surface of the body 11 is also axially connected to three driven wheel shafts 15. The three driven wheel shafts 15 are evenly arranged circumferentially and located on a first circle. The center of the first circle is located on the axis of the body 11. The body 11 is also provided with a drive wheel transmission hole 13. The drive wheel shaft is axially connected inside the drive wheel transmission hole 13. The center of the first circle is located on the axis of the drive wheel shaft. The lower end of the body 11 is also provided with a motor 3 that drives the drive wheel shaft to rotate. The driven gear 22, the drive gear 21 and the motor 3 form a drive device 2 that drives several lead screws 5 to rotate synchronously.

[0029] A driven gear 22 is fixedly connected to the driven shaft 15, and a driving gear 21 is fixedly connected to the driving shaft. All three driven gears 22 mesh with the driving gear 21. The thickness of the driven gear 22 is less than the height between the bottom surface of the support plate 4 and the top surface of the gear seat 1.

[0030] A lead screw 5 extending upward through the support plate 4 is fixed to the driven wheel shaft 15. A rotating rod 6 extending upward is threadedly connected to the lead screw 5. The rotating rod 6 includes an externally threaded part 62 connected to the top of the inner rotating part 61. An upwardly extending threaded hole is opened on the bottom surface of the inner rotating part 61. The lead screw 5 is threadedly connected to the threaded hole. The externally threaded part 62 is machined with threads and extends upward through the top plate 7. A positioning nut 8 located at the upper end of the top plate 7 is threadedly connected to the externally threaded part 62. The positioning nut 8 is in contact with the top surface of the plate.

[0031] A spring is provided on the rotating rod 6, and the two ends of the spring are in contact with the top surface of the support plate 4 and the bottom surface of the top plate 7, respectively, that is, the spring extends along the height direction.

[0032] In use, this invention connects the top plate 7 and the support plate 4 via a rotating rod 6, which compresses the spring between the top plate 7 and the support plate 4, facilitating installation. The rotating rod 6 also guides the spring's extension and retraction. Because several rotating rods 6 slide synchronously, several springs extend and retract synchronously, thus causing the top plate 7 to bear force synchronously, reducing damage to the closing spring. Through the cooperation of the lead screw 5 and the rotating rod 6, the rotating rod 6 slides on the support plate 4 while the force between the threads overcomes the spring's elasticity, thus fixing the spring. This eliminates the need for additional fiber structures to restrict the sliding of the rotating rod 6, simplifying the structure. The driving gear 21 drives several driven gears 22, enabling the synchronous rotation of several lead screws 5, which in turn enables the synchronous sliding of several rotating rods 6, thus achieving synchronous extension and retraction of several springs.

[0033] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An automatic spring-loaded device for a closing resistor, characterized in that: Includes a top plate (7), a support plate (4) located at the lower end of the top plate (7), and several springs that are respectively connected to the top plate (7) and the support plate (4) at both ends. The top plate (7) is detachably connected with a rotating rod (6) that is corresponding to the spring and passes through the corresponding spring. Several of the rotating rods (6) slide synchronously on the support plate (4) along the height direction.

2. The automatic spring device for closing resistor according to claim 1, characterized in that: The support plate (4) is connected to a lead screw (5) that is corresponding to and threaded to the corresponding lead screw (6). The lower end of the support plate (4) is also provided with a drive device (2) that drives several lead screws (5) to rotate synchronously.

3. The automatic spring device for closing resistor according to claim 2, characterized in that: The drive device (2) includes a driven gear (22) that is corresponding to and coaxial with the lead screw (5), a drive gear (21) that is located between and meshes with the driven gears (22), and a motor (3) that drives the drive gear (21) to rotate.

4. The automatic spring device for closing resistor according to claim 3, characterized in that: The support plate (4) is provided with a gear seat (1) below it. The bottom surface of the gear seat (1) is provided with a ground support leg (12). The top surface of the gear seat (1) is provided with a column (14) connected to the support plate (4). The gear seat (1) is also axially connected with a driven wheel shaft (15) that is fixed to the corresponding driven gear (22). Several driven wheel shafts (15) are located on a first circle, and the center of the first circle is located on the axis of the driving gear (21).

5. The automatic spring device for closing resistor according to claim 4, characterized in that: The bottom surface of the support plate (4) is provided with a groove corresponding to the column (14).

6. The automatic spring device for closing resistor according to claim 5, characterized in that: The thickness of the driven gear (22) is less than the height between the bottom surface of the support plate (4) and the top surface of the gear seat (1).

7. The automatic spring device for closing resistor according to claim 2, characterized in that: The swivel (6) includes an external threaded part (62) connected to the top of the inner swivel part (61). The inner swivel part (61) is threadedly connected to the lead screw (5). The external threaded part (62) extends upward through the top plate (7). A positioning nut (8) is threadedly connected to the external threaded part (62) and contacts the top surface of the top plate (7).

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