Mounting device for watchband contact finger limiting bracket of high-voltage circuit breaker

Abstract

The invention discloses a mounting device for a watchband contact finger limiting bracket of a high-voltage circuit breaker, and the device comprises a cylindrical mounting seat, a connecting plate with a gap, a handle, a locking rod, a locking mechanism for locking the locking rod, a pressing block, a guide wheel, and a pressing wheel. The connecting plate is arranged at the upper end of the mounting base and forms an opening for a watchband contact finger limiting support to penetrate through at the notch, the pressing block is slidably mounted in the mounting base in the radial direction, a long hole extending in the radial direction is formed in the center of the connecting plate, and the locking rod penetrates through the long hole to be connected with one end of the pressing block; the other end of the pressing block is rotatably provided with a guide wheel and a pressing wheel which are arranged side by side, the guide wheel and the pressing wheel are exposed in the opening, and the handle is arranged on the outer wall of the installation base in the radial direction. The mounting efficiency of the watchband contact finger limiting bracket is improved by utilizing the guide effect of the guide wheel and the accurate distance control of the pressing wheel, meanwhile, the roundness and the reliability of the watchband contact finger limiting bracket are ensured, and the connection quality and the reliability of the conductive connection of the main contact of the circuit breaker are improved.

Description

Technical Field

[0001] The invention belongs to the field of high-voltage circuit breakers, and in particular relates to an installation device for a strap contact finger limiting bracket of a high-voltage circuit breaker. Background Art

[0002] As a core component in high-voltage power systems, high-voltage circuit breakers require reliable electrical contact during the opening and closing process. Strap fingers are commonly used in the electrical contact of circuit breaker main contacts due to their excellent conductivity, wear resistance, heat resistance, and low connection force. To ensure connection reliability, limit brackets must be installed to secure and guide them. The strap finger limit brackets are multi-section, long strip structures. Two strap finger limit brackets must be embedded in the annular bracket grooves on the inner edge of the circuit breaker's pressure cylinder. Manual installation and adjustment of the strap finger limit brackets by skilled workers alone is not only inefficient, but can also increase the resistance of the main contacts during the opening and closing process due to insufficient embedding depth and roundness, and may even scratch the main contacts, affecting the quality of the electrical connection. This reduces the opening and closing speed of the circuit breaker, further impacting the circuit breaker's opening and closing performance and reliability. Summary of the Invention

[0003] The object of the present invention is to provide a high-voltage circuit breaker strap contact finger limit bracket installation device which has a simple structure, low cost, and can improve installation quality and installation efficiency.

[0004] The objectives of the present invention are achieved through the following technical measures: A high-voltage circuit breaker strap contact limit bracket installation device, characterized in that it includes a cylindrical mounting seat, a connecting plate with a notch, a handle, a locking rod, a locking mechanism for locking the locking rod, a pressure block, a guide wheel and a pressure wheel, the connecting plate is arranged at the upper end of the mounting seat and forms an opening for inserting the strap contact limit bracket at the notch, the pressure block is radially slidably installed in the mounting seat, an elongated hole extending radially is provided at the center of the connecting plate, and the central axes of the pressure block and the elongated hole are on the same diameter, the locking rod passes through the elongated hole and is connected to one end of the pressure block, and the other end of the pressure block is rotatably installed with a guide wheel and a pressure wheel arranged side by side, the guide wheel and the pressure wheel are exposed in the opening, and the handle is radially arranged on the outer wall of the mounting seat.

[0005] The present invention does not require manual installation and adjustment of the watchband contact finger limit bracket section by section. Instead, the guiding function of the guide wheel and the precise distance control of the pressure wheel are utilized to greatly improve the installation efficiency of the watchband contact finger limit bracket. At the same time, the roundness and reliability of the watchband contact finger limit bracket are guaranteed, thereby improving the connection quality and reliability of the conductive connection of the circuit breaker main contact.

[0006] The pressure block of the present invention is slidably installed through a guide block. The upper surface of the guide block has a sliding groove that penetrates radially. The top surfaces of both sides of the sliding groove are fixed on the lower surface of the connecting plate. The pressure block consists of a rod and a U-shaped frame connected to one end of the rod. The rod is located in the sliding groove and slides with it. The rod is connected to the lower end of the locking rod. The guide wheel and the pressure wheel are located in the U-shaped frame and can rotate around the vertical rotating shaft respectively.

[0007] The middle part of the wheel surface of the pressure wheel of the present invention is an annular pressure groove for uniformly squeezing the watch strap contact finger limit bracket, and the two ends of the wheel surface of the pressure wheel are rolling circular surfaces for rolling along the inner circular surface of the circuit breaker pressure cylinder. In the working state, the pressure wheel can roll along the inner circular surface of the circuit breaker pressure cylinder through the rolling circular surface. At the same time, the annular pressure groove uniformly squeezes the watch strap contact finger limit bracket, which can efficiently complete the installation of the watch strap contact finger limit bracket from the long strip structure to the annular structure.

[0008] The guide wheel of the present invention has an annular guide groove in the middle of its wheel surface that is compatible with the watchband finger limit bracket. Both walls of the annular guide groove are inclined surfaces. The guide wheel uses the inclined surfaces to confine the watchband finger limit bracket within the annular guide groove, facilitating efficient operation of the pressure wheel.

[0009] The outer diameter of the annular pressing groove of the pressing wheel of the present invention is larger than the outer diameters of the two ends of the wheel surface of the guide wheel and smaller than the outer diameter of the rolling circular surface.

[0010] The present invention provides a guide ring made of elastic material and used to contact the top outer wall of the circuit breaker pressure cylinder on the lower part of the inner wall of the mounting base, and a limit ring made of elastic material and used to contact the top of the circuit breaker pressure cylinder on the inner surface of the connecting plate. Polytetrafluoroethylene pads with an extremely low friction coefficient can be used for the guide ring and the limit ring, which can ensure that the watchband contact finger limit bracket mounting device can rotate smoothly after being inserted into the circuit breaker pressure cylinder, and can protect the end and outer edge contact part of the circuit breaker pressure cylinder from damage.

[0011] A self-lubricating and wear-resistant oil-free composite bearing bushing is provided between the pressing wheel and the rotating shaft of the present invention, which can reduce the friction force during the rolling process of the pressing wheel and enhance the operability of the device.

[0012] The locking mechanism of the present invention is fixed on the upper surface of the connecting plate, and the locking mechanism has a push rod that can be extended and retracted in the radial direction, and the central axis of the push rod and the central axis of the pressure block and the elongated hole are on the same diameter. The push rod can extend and touch the locking rod after the locking rod moves into place to lock it, or the push rod can extend and touch the locking rod to push it and lock it after moving into place.

[0013] The handle of the present invention comprises a pair of rods, one end of each rod being fixed to the outer wall of the mounting base, and the pair of rods being located on the same diameter. The handle adopts two rods arranged along the same diameter, and the force is evenly distributed during use, making operation convenient.

[0014] Compared with the prior art, the present invention has the following significant effects:

[0015] (1) The present invention does not require manual installation and adjustment of the strap contact finger limit bracket section by section. Instead, the guiding function of the guide wheel and the precise distance control of the pressure wheel are utilized to greatly improve the installation efficiency of the strap contact finger limit bracket. At the same time, the roundness and reliability of the strap contact finger limit bracket are guaranteed, thereby improving the connection quality and reliability of the conductive connection of the circuit breaker main contact.

[0016] (2) The present invention has a simple structure, low cost, and strong practicality, and is suitable for wide promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 is a cross-sectional view of the present invention;

[0020] Figure 3 is a top view of the present invention;

[0021] Figure 4 Schematic diagram of the three-dimensional structure of the briquette of the present invention;

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the guide block of the present invention;

[0023] Figure 6 This is a cross-sectional view of the pressure wheel and guide wheel of the present invention assembled on the U-shaped frame;

[0024] Figure 7 This is a schematic diagram of the guide wheel of the present invention when it is working;

[0025] Figure 8 It is a schematic diagram of the pressure wheel of the present invention when working.

[0026] In the figure: 1-mounting seat, 2-connecting plate, 3-handle, 4-guide block, 5-pressure block, 6-guide wheel, 7-pressure wheel, 8-first rotating shaft, 9-second rotating shaft, 10-guide ring, 11-limiting block, 12-locking rod, 13-locking mechanism, 14-circuit breaker pressure cylinder, 15-band contact finger limiting bracket, 101-first annular groove, 201-second annular groove, 202-long hole, 203-center plane, 401-sliding groove, 501-rod, 502-U-shaped frame, 503-first pair of through holes, 504-second pair of through holes, 601-annular guide groove, 602-groove bottom, 603-upper groove wall, 604-lower groove wall, 701-annular pressure groove, 702-rolling circular surface, 1301-top rod, 16-opening, 17-arc structure, 18-annular bracket groove. DETAILED DESCRIPTION

[0027] like Figures 1 to 8 As shown, the present invention is a high-voltage circuit breaker strap contact limit bracket mounting device, including a cylindrical mounting base 1, a connecting plate 2 with a notch, a handle 3, a locking rod 12, a locking mechanism 13 for locking the locking rod 12, a pressure block 5, a guide wheel 6 and a pressure wheel 7. The connecting plate 2 is formed by opening a notch on a circular plate adapted to the upper end of the mounting base 1. The connecting plate 2 is fixed to the upper end of the mounting base 1 and forms an opening 16 for inserting the strap contact limit bracket 15 at the notch. The pressure block 5 is radially (i.e., along the center plane 203, the locking rod 1 2 axis and the center plane 203 formed along the reciprocating movement direction of the elongated hole 202 can be slidably installed in the mounting seat 1, and an elongated hole 202 extending radially (i.e., along the center plane 203) is provided at the center of the connecting plate 2, and the center axis of the pressure block 5 and the elongated hole 202 are on the same diameter. The locking rod 12 passes through the elongated hole 202 and is connected to one end of the pressure block 5. The other end of the pressure block 5 is rotatably installed with a guide wheel 6 and a pressure wheel 7 arranged side by side. The guide wheel 6 and the pressure wheel 7 are exposed in the opening 16, and the opening 16 can be fan-shaped or irregular.

[0028] In this embodiment, the pressing block 5 is slidably installed by the guide block 4. The upper surface of the guide block 4 has a sliding groove 401 that penetrates in the radial direction. The central axis of the sliding groove 401 is coplanar with the central plane 203; the top surfaces of both sides of the sliding groove 401 are fixed to the lower surface of the connecting plate 2. The pressing block 5 consists of a rod 501 and a U-shaped frame 502 connected to one end thereof. The rod 501 is located in the sliding groove 401 and slides with it. The rod 501 is connected to the lower end of the locking rod 12, and the locking rod 12 can move back and forth along the elongated hole 202, while driving the pressing block 5 to move back and forth along the sliding groove 401; the guide wheel 6 and the pressing wheel 7 are located in the U-shaped frame 502 and can rotate around the vertical first rotating shaft 8 and the second rotating shaft 9 respectively (a first pair of through holes 503 and a second pair of through holes 504 are provided at the upper and lower ends of the U-shaped frame 502, and the first pair of through holes 503 and the second pair of through holes 504 are symmetrically arranged along the central plane 203 ), wherein the pressure wheel 7 is a cylindrical structure with a middle through hole, and the pressure wheel 7 is coaxially arranged in the U-shaped frame 502 with the second rotating shaft 9 and the second pair of through holes 504 through a bearing. The pressure wheel 7 can rotate relative to the second rotating shaft 9 along the bearing hole through the bearing, and the second rotating shaft 9 can rotate relative to the pressure block 5 along the second pair of through holes 504. A self-lubricating and wear-resistant oil-free composite bearing bushing is used between the pressure wheel 7 and the second rotating shaft 9, which can reduce the friction of the pressure wheel 7 during the rolling process and enhance the operability of the device; the middle part of the wheel surface of the pressure wheel 7 is an annular pressure groove 701 for uniformly squeezing the watchband contact finger limit bracket 15, and the two ends of the wheel surface of the pressure wheel 7 are rolling circular surfaces 702 for rolling along the inner surface of the circuit breaker pressure cylinder 14, and the outer diameter of the annular pressure groove 701 is slightly larger than the outer diameter of the two ends of the wheel surface of the guide wheel 6 (larger by 0.5 to 1 mm) and slightly smaller than the outer diameter of the rolling circular surface 702 (smaller by 0.1 to 0.5 mm). When in working state, the pressure wheel 7 can roll along the inner surface of the circuit breaker pressure cylinder 14 through the rolling circular surface 702. At the same time, the annular pressure groove 701 evenly squeezes the watchband contact finger limit bracket 15, which can efficiently complete the installation of the watchband contact finger limit bracket from the long strip structure to the annular structure.

[0029] The guide wheel 6 is a cylindrical structure with a central through-hole. It is coaxially arranged within the U-shaped frame 502 of the pressure block 5 via a first rotating shaft 8 and a first pair of through-holes 503. The guide wheel 6 can rotate relative to the first rotating shaft 8 along its central through-hole, and the first rotating shaft 8 can rotate relative to the pressure block 5 along the first pair of through-holes 503. An annular guide groove 601 is defined in the middle of the guide wheel 6, which mates with the watchband finger stop bracket 15. The annular guide groove 601 consists of a groove bottom surface 602, an upper groove wall 603, and a lower groove wall 604, both of which are inclined surfaces. This inclined surface allows the guide wheel 6 to confine the watchband finger stop bracket 15 within the confines of the annular guide groove 601, facilitating efficient operation of the pressure wheel 7.

[0030] A first annular groove 101 is provided on the lower inner wall of the mounting base 1, extending through the lower end surface of the mounting base 1. A guide ring 10 made of an elastic material is mounted in this first annular groove 101. This guide ring 10 is a complete cylindrical shape, and the portion of the guide ring 10 protruding from the first annular groove 101 is designed to contact the top outer wall of the circuit breaker cylinder 14. A second annular groove 201 is provided on the inner surface of the connecting plate 2. A stop ring 11 made of an elastic material is mounted in this second annular groove 201. This stop ring 11 is not a complete ring, and the portion of the stop ring 11 protruding from the second annular groove 201 is designed to contact the top of the circuit breaker cylinder 14. Guide ring 10 and stop ring 11 can be constructed with polytetrafluoroethylene pads with an extremely low friction coefficient, ensuring smooth rotation of the watchband contact finger limit bracket mounting device after insertion into the circuit breaker cylinder, protecting the end and outer edge contact portions of the cylinder from damage.

[0031] The locking mechanism 13 is fixed to the upper surface of the connecting plate 2. The locking mechanism 13 has a radially retractable push rod 1301. The central axis of the push rod 1301 is on the same diameter as the central axis of the pressure block 5 and the elongated hole 202, that is, the central axis of the locking mechanism 13 coincides with the central plane 203. The push rod can be extended to contact the locking rod after the locking rod is moved into position, thereby locking the locking rod. Alternatively, the push rod can be extended to contact the locking rod, causing it to be pushed and moved into position before locking the locking rod. This can be achieved by adjusting the extension length of the push rod, which is a conventional technical means in the field and will not be described in detail here. The locking mechanism 13 is a self-locking structure with a push rod 1301 at the front end. After the push rod 1301 is extended a certain distance, it reaches a one-way locking state, which can unilaterally limit the locking rod 12. Applying a reverse thrust to the push rod 1301 will not cause it to retract into its original position. The locking mechanism 13 can use an existing toggle clamp structure. Pushing the toggle clamp handle downward can drive the toggle clamp push rod to extend and lock it. At this time, applying a force in the opposite direction to the push rod cannot push the push rod normally. Pushing the toggle clamp handle upward can drive the toggle clamp push rod to retract.

[0032] A pair of handles 3 are radially arranged on the outer wall of the mounting base 1, and the pair of handles 3 are located on the same diameter. One end of the pair of handles 3 is fixed to the outer wall of the mounting base, and the other end extends for the operator to grasp. The operator grasps a handle in each hand and pushes the handle 3 clockwise or counterclockwise to rotate the device clockwise or counterclockwise.

[0033] like Figure 7 and Figure 8 As shown, the working process of the present invention is as follows:

[0034] The circuit breaker pressure cylinder 14 is cylindrical, and its upper end is an arc structure 17. An annular bracket groove 18 is provided on the inner edge of the circuit breaker pressure cylinder 14. When installing the strap contact limit bracket 15, first place the arc structure 17 at the end of the circuit breaker pressure cylinder 14 vertically upward. Under the guidance of the arc structure 17 at the end of the circuit breaker pressure cylinder 14, the device can be easily coaxially sheathed on the outer edge of the circuit breaker pressure cylinder 14 (at this time, the central axis of the device and the central axis of the circuit breaker pressure cylinder 14 are on the same straight line, and the top of the circuit breaker pressure cylinder 14 touches the limit Ring, the upper outer wall of the circuit breaker pressure cylinder 14 contacts the guide ring 10, and the arc structure 17 at the upper end of the circuit breaker pressure cylinder 14 is exposed at the opening 16), then 2 to 3 sections of the strap contact finger limit bracket 15 are placed into the circuit breaker pressure cylinder 14 through the opening 16 and squeezed into the annular bracket groove 18 on the inner edge of the circuit breaker pressure cylinder 14, so that it is partially embedded but not reaching the working depth, push the handle 3 to rotate the device on the circuit breaker pressure cylinder 14 to adjust the orientation of the device so that the pressure wheel 7 is aligned with the part of the strap contact finger limit bracket 15 that is not completely embedded , push the locking rod 12, the locking rod 12 moves along the elongated hole 202 of the connecting plate 2 toward the direction of the watchband contact finger limit bracket 15, and at the same time drives the pressure block 5 to move along the sliding groove 401 of the guide block 4 until the rolling circular surface 702 of the pressure wheel 7 is close to the inner edge of the circuit breaker pressure cylinder 14, and the toggle clamp handle is pushed downward, and the toggle clamp top rod extends to abut the locking rod 12. At this time, the toggle clamp locks the locking rod 12 on one side. Under the action of the toggle clamp, the pressure wheel 7 maintains a certain pressure on the circuit breaker pressure cylinder 14. Under the guidance of the guide wheel 6 on the watchband contact finger limit bracket 15, The push handle 3 drives the entire device to rotate around the central axis of the circuit breaker pressure cylinder 14 and in the direction of the remaining part of the watchband contact finger limit bracket 15. The annular pressure groove 701 of the pressure wheel 7 can evenly and efficiently squeeze the watchband contact finger limit bracket 15 into the annular bracket groove 18 on the inner edge of the circuit breaker pressure cylinder 14. Move the elbow clamp handle upward to release the unilateral lock of the locking rod 12. Push the locking rod 12 to drive the pressure block 5 away from the inner edge of the circuit breaker pressure cylinder 14, remove the device from the circuit breaker pressure cylinder 14, and complete the installation of the watchband contact finger limit bracket 15.

[0035] The embodiments of the present invention are not limited to these. Based on the above contents of the present invention, according to common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, the invention may also be modified, replaced or changed in various other forms, all of which fall within the scope of protection of the present invention.

Claims

1. A high-voltage circuit breaker strap contact limit bracket installation device, characterized by: The invention comprises a cylindrical mounting seat, a connecting plate with a notch, a handle, a locking rod, a locking mechanism for locking the locking rod, a pressure block, a guide wheel and a pressure wheel. The connecting plate is arranged at the upper end of the mounting seat and forms an opening for inserting the watch strap finger limit bracket at the notch. The pressure block is slidably mounted in the mounting seat along the radial direction. An elongated hole extending along the radial direction is provided at the center of the connecting plate, and the central axes of the pressure block and the elongated hole are on the same diameter. The locking rod passes through the elongated hole and is connected to one end of the pressure block. The other end of the pressure block is rotatably mounted with a guide wheel and a pressure wheel arranged side by side. The guide wheel and the pressure wheel are exposed in the opening, and the handle is radially arranged on the outer wall of the mounting seat.

2. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 1, characterized in that: The pressing block is slidably installed through a guide block. The upper surface of the guide block has a sliding groove that penetrates radially. The top surfaces of both sides of the sliding groove are fixed to the lower surface of the connecting plate. The pressing block consists of a rod and a U-shaped frame connected to one end of the rod. The rod is located in the sliding groove and slides with it. The rod is connected to the lower end of the locking rod. The guide wheel and the pressing wheel are located in the U-shaped frame of the pressing block and can rotate around the vertical rotating shaft respectively.

3. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 2, characterized in that: The middle part of the wheel surface of the pressure wheel is an annular pressure groove for uniformly squeezing the watchband contact finger limiting bracket, and the two ends of the wheel surface of the pressure wheel are rolling circular surfaces for rolling along the inner circular surface of the circuit breaker pressure cylinder.

4. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 3, characterized in that: An annular guide groove adapted to the watchband finger-touch limiting bracket is provided in the middle of the wheel surface of the guide wheel, and both groove walls of the annular guide groove are inclined surfaces.

5. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 4, characterized in that: The outer diameter of the annular pressing groove of the pressing wheel is larger than the outer diameters of the two ends of the wheel surface of the guide wheel and smaller than the outer diameter of the rolling circular surface.

6. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 5, characterized in that: A guide ring is provided on the lower part of the inner wall of the mounting seat. The guide ring is made of elastic material and is used to contact the top outer wall of the circuit breaker pressure cylinder.

7. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 6, characterized in that: A limiting ring made of elastic material and used for contacting the top end of the circuit breaker pressure cylinder is provided on the inner surface of the connecting plate.

8. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 7, characterized in that: A self-lubricating and wear-resistant oil-free composite bearing bushing is provided between the pressure wheel and its rotating shaft.

9. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 8, characterized in that: The locking mechanism is fixed on the upper surface of the connecting plate, and the locking mechanism has a radially retractable push rod, and the central axis of the push rod and the central axis of the pressure block and the elongated hole are on the same diameter. The push rod can extend and touch the locking rod after the locking rod moves into place to lock it, or the push rod can extend and touch the locking rod to push it and lock it after moving into place.

10. The high-voltage circuit breaker strap contact limit bracket installation device according to claim 9, characterized in that: The handle is a pair of rods, one end of each rod is fixed on the outer wall of the mounting seat, and the pair of rods are located on the same diameter.

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