A mounting device for a high-voltage circuit breaker meter strap contact finger limit bracket

Abstract

This invention discloses an installation device for a high-voltage circuit breaker band contact finger limiting bracket, comprising a cylindrical mounting base, 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 roller. The connecting plate is located at the upper end of the mounting base and forms an opening at the notch for the band contact finger limiting bracket to pass through. The pressure block is radially slidably installed in the mounting base. An elongated hole extending radially is provided at the center of the connecting plate. The locking rod passes through the elongated hole and connects to one end of the pressure block. The other end of the pressure block is rotatably mounted with a guide wheel and a pressure roller arranged side by side, exposed in the opening. The handle is radially disposed on the outer wall of the mounting base. This invention utilizes the guiding effect of the guide wheel and the precise distance control of the pressure roller to improve the installation efficiency of the band contact finger limiting bracket. Simultaneously, the roundness and reliability of the band contact finger limiting bracket are guaranteed, improving the connection quality and reliability of the conductive connection of the circuit breaker main contacts.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage circuit breakers, and particularly relates to a high-voltage circuit breaker meter strap contact finger limit bracket mounting device. Background Technology

[0002] As a core component of high-voltage power systems, the reliability of electrical contacts is crucial in the breaking and closing processes of high-voltage circuit breakers. Meter-band contact fingers are widely used in the electrical contacts of circuit breaker main contacts due to their excellent conductivity, wear resistance, heat resistance, and low connection force. To ensure connection reliability, limiting brackets are installed to fix and guide them. These limiting brackets are multi-sectioned long strips, requiring two to be embedded into the annular bracket groove on the inner edge of the circuit breaker's pressure cylinder. If the installation and adjustment of the meter-band contact finger limiting brackets are done manually by skilled workers, it is not only inefficient but also prone to increasing resistance during the opening and closing process due to insufficient embedding depth and roundness, potentially even scratching the main contacts and affecting the quality of the electrical connection. This reduces the circuit breaker's opening and closing speed, ultimately impacting its performance and reliability. Summary of the Invention

[0003] The purpose of this invention is to provide a high-voltage circuit breaker meter strap contact finger limit bracket installation device that is simple in structure, low in cost, and can improve installation quality and efficiency.

[0004] The objective of this invention is achieved through the following technical measures: a high-voltage circuit breaker watch strap touch finger limit bracket mounting device, characterized in that it includes a cylindrical mounting base, 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 located at the upper end of the mounting base and forms an opening at the notch for the watch strap touch finger limit bracket to pass through. The pressure block is slidably mounted radially within the mounting base. 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. 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 pressure wheel are exposed in the opening. The handle is radially disposed on the outer wall of the mounting base.

[0005] This invention eliminates the need for manual installation and adjustment of the watch strap finger limit bracket section by section. Instead, it utilizes the guiding action of the guide wheel and the precise distance control of the pressure roller to significantly improve the installation efficiency of the watch strap finger limit bracket. At the same time, the roundness and reliability of the watch strap finger limit bracket are guaranteed, thereby improving the connection quality and reliability of the conductive connection of the main contacts of the circuit breaker.

[0006] The pressure block of the present invention is slidably installed by means of a guide block. The upper surface of the guide block has a radially penetrating sliding groove. The top surfaces of both sides of the sliding groove are fixed to the lower surface of the connecting plate. The pressure block is composed 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 about the vertical axis respectively.

[0007] The pressure roller of the present invention has an annular pressure groove in the middle of its wheel surface for uniformly pressing the watch strap finger limit bracket, and the two ends of the wheel surface of the pressure roller are rolling circular surfaces for rolling along the inner circular surface of the circuit breaker pressure cylinder. In the working state, the pressure roller can roll along the inner circular surface of the circuit breaker pressure cylinder through the rolling circular surfaces, while the annular pressure groove uniformly presses the watch strap finger limit bracket, which can efficiently complete the installation of the watch strap finger limit bracket from a long strip structure to an annular structure.

[0008] The guide wheel of the present invention has an annular guide groove in the middle of its wheel surface that is adapted to the watch strap finger limiting bracket, and both walls of the annular guide groove are inclined surfaces. The guide wheel can restrict the watch strap finger limiting bracket within the annular guide groove range through the inclined surfaces, so as to facilitate the efficient operation of the pressure wheel.

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

[0010] The present invention provides a guide ring made of elastic material on the lower inner wall of the mounting base for contacting the top outer wall of the circuit breaker cylinder, and a limiting ring made of elastic material on the inner surface of the connecting plate for contacting the top of the circuit breaker cylinder. The guide ring and the limiting ring can be made of polytetrafluoroethylene pads with extremely low coefficient of friction, which can ensure that the watch strap finger limiting bracket mounting device can rotate smoothly after being fitted into the circuit breaker cylinder, and can protect the end and outer edge contact parts of the circuit breaker cylinder from damage.

[0011] The pressure roller of the present invention is provided with a self-lubricating and wear-resistant oil-free composite bearing bushing between it and its rotating shaft, which can reduce the friction during the rolling process of the pressure roller 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. The locking mechanism has a top rod that can extend and retract radially, and the central axis of the top rod, the pressure block, and the central axis of the elongated hole are on the same diameter. The top rod can extend and press against the locking rod after the locking rod moves into place to lock it, or the top rod can extend and press against the locking rod to push it and lock it after it moves into place.

[0013] The handle of this invention consists of a pair of rods, one end of each rod being fixed to the outer wall of the mounting base, and the pair of rods are located on the same diameter. The handle uses two rods arranged along the same diameter, resulting in even force distribution and convenient operation during use.

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

[0015] (1) This invention eliminates the need for manual installation and adjustment of the watch strap finger limit bracket section by section. Instead, it utilizes the guiding effect of the guide wheel and the precise distance control of the pressure roller to significantly improve the installation efficiency of the watch strap finger limit bracket. At the same time, the roundness and reliability of the watch strap finger limit bracket are guaranteed, thereby improving the connection quality and reliability of the conductive connection of the main contacts of the circuit breaker.

[0016] (2) The present invention has a simple structure, low cost, and strong practicality, and is suitable for widespread promotion and use. Attached Figure Description

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

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

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

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

[0021] Figure 4 This is a three-dimensional structural diagram of the pressing block of the present invention;

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

[0023] Figure 6 This is a cross-sectional view of the pressure roller and guide roller 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 in operation;

[0025] Figure 8 This is a schematic diagram of the pressure roller of the present invention in operation.

[0026] In the diagram: 1-Mounting base, 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-Watchband touch finger limit bracket, 101-First annular groove, 201-Second annular groove, 202-Elongated hole, 203-Center plane, 401-Sliding groove, 501-Rod, 502-U-shaped frame, 503-First through hole, 504-Second through hole, 601-Annular guide groove, 602-Groove bottom surface, 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 Implementation

[0027] like Figures 1 to 8 As shown, the present invention discloses a high-voltage circuit breaker watch strap contact finger limiting bracket mounting device, comprising 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 in a circular plate that adapts to the upper port of the mounting base 1. The connecting plate 2 is fixed to the upper port of the mounting base 1, and an opening 16 is formed at the notch for the watch strap contact finger limiting bracket 15 to pass through. The pressure block 5 is radially (i.e., along the central plane 203), and the locking rod 12... The axis of the connecting plate 2 and the reciprocating direction of the elongated hole 202 form a central plane 203, which can be slidably installed in the mounting base 1. The center of the connecting plate 2 is provided with an elongated hole 202 extending radially (i.e., along the central plane 203), and the central 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 mounted 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, which can be fan-shaped or irregular in shape.

[0028] In this embodiment, the pressure block 5 is slidably installed via the guide block 4. The upper surface of the guide block 4 has a radially penetrating sliding groove 401, and 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 pressure block 5 consists of a rod 501 and a U-shaped frame 502 connected to one end of the rod. 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. The locking rod 12 can reciprocate along the elongated hole 202, while driving the pressure block 5 to reciprocate along the sliding groove 401. The guide wheel 6 and the pressure 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. (The upper and lower ends of the U-shaped frame 502 are provided with a first pair of through holes 503 and a second pair of through holes 504, which are symmetrically arranged along the central plane 203.) The device is configured such that the pressure roller 7 is a cylindrical structure with a central through hole. The pressure roller 7 is coaxially arranged in the U-shaped frame 502 with the second rotating shaft 9 and the second pair of through holes 504 via bearings. The pressure roller 7 can rotate relative to the second rotating shaft 9 through the bearing holes, and the second rotating shaft 9 can rotate relative to the pressure block 5 through the second pair of through holes 504. The pressure roller 7 and the second rotating shaft 9 are connected by a self-lubricating and wear-resistant oil-free composite bearing bushing, which can reduce the friction of the pressure roller 7 during rolling and enhance the operability of the device. The middle part of the wheel surface of the pressure roller 7 is an annular pressure groove 701 for uniformly pressing the watch strap finger limit bracket 15, and the two ends of the wheel surface of the pressure roller 7 are rolling circular surfaces 702 for rolling along the inner circular surface of the circuit breaker pressure cylinder 14. The outer diameter of the annular pressure groove 701 is slightly larger (0.5-1mm larger) than the outer diameter of the two ends of the wheel surface of the guide wheel 6, and slightly smaller (0.1-0.5mm smaller) than the outer diameter of the rolling circular surface 702. In operation, the pressure roller 7 can roll along the inner circular surface of the circuit breaker pressure cylinder 14 via the rolling circular surface 702. At the same time, the annular pressure groove 701 uniformly compresses the watch strap finger limit bracket 15, which can efficiently complete the installation of the watch strap finger limit bracket from a long strip structure to an 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. The guide wheel 6 has an annular guide groove 601 in the center of its surface, which is adapted to the watch strap finger-limiting bracket 15. The annular guide groove 601 consists of a bottom surface 602, an upper groove wall surface 603, and a lower groove wall surface 604, both of which are inclined surfaces. The guide wheel 6 can restrict the watch strap finger-limiting bracket 15 within the annular guide groove 601 via the inclined surfaces, facilitating efficient operation of the pressure wheel 7.

[0030] A first annular groove 101 is provided on the lower part of the inner wall of the mounting base 1. The first annular groove 101 extends directly to the lower end face of the mounting base 1. A guide ring 10 made of elastic material is installed in the first annular groove 101. The guide ring 10 is a complete cylindrical shape. The part of the guide ring 10 protruding from the first annular groove 101 is used 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 limiting ring 11 made of elastic material is installed in the second annular groove 201. The limiting ring 11 is not a complete ring. The part of the limiting ring 11 protruding from the second annular groove 201 is used to contact the top of the circuit breaker cylinder 14. The guide ring 10 and the limiting ring 11 can be made of polytetrafluoroethylene gaskets with extremely low coefficient of friction, which can ensure that the watch strap finger limiting bracket mounting device can rotate smoothly after being fitted into the circuit breaker cylinder, and can protect the end and outer edge contact parts of the circuit breaker 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 extendable push rod 1301, and the central axis of the push rod 1301, the pressure block 5, and the elongated hole 202 are on the same diameter. That is, the central axis of the locking mechanism 13 coincides with the central plane 203. The push rod can extend and press against the locking rod after the locking rod has moved into place to lock it, or the push rod can extend and press against the locking rod to push it into place before locking it. Specifically, this can be achieved by adjusting the extension length of the push rod. This is a conventional technical means in this field and will not be elaborated here. The locking mechanism 13 is a self-locking structure with a push rod 1301 at the front end. After the push rod 1301 extends a certain distance, it reaches a one-way locking state, which can limit the locking rod 12 on one side. Applying a reverse pushing force to the push rod 1301 will not cause it to retract to its original position. The locking mechanism 13 can be an existing elbow clamp structure. Pushing the elbow clamp handle down will cause the elbow clamp rod to extend and be in the locked position. At this time, applying a force in the opposite direction to the rod will not push the rod normally. Pushing the elbow clamp handle up will cause the elbow clamp rod to retract.

[0032] The handles 3 are a pair, 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 out for the operator to hold. The operator holds one handle in each hand and pushes the handles 3 clockwise / counterclockwise to realize the clockwise / counterclockwise rotation of the device.

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

[0034] The circuit breaker pressure cylinder 14 is cylindrical with an arc-shaped structure 17 at its upper end. An annular support groove 18 is provided on the inner edge of the circuit breaker pressure cylinder 14. When installing the watch strap contact finger limit bracket 15, first place the circuit breaker pressure cylinder 14 vertically with the arc-shaped structure 17 at its end facing upwards. Under the guidance of the arc-shaped structure 17 at the end of the circuit breaker pressure cylinder 14, the device easily and coaxially fits onto 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). On the 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 watch strap finger limiting bracket 15 are placed into the circuit breaker pressure cylinder 14 from the opening 16 and pressed 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 roller 7 is aligned with the part of the watch strap finger limiting bracket 15 that is not fully embedded. Pushing the locking lever 12, the locking lever 12 moves along the elongated hole 202 of the connecting plate 2 toward the watch strap finger limit bracket 15, simultaneously driving 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 roller 7 is in close contact with the inner edge of the circuit breaker pressure cylinder 14. Pushing the elbow clamp handle downwards, the elbow clamp top rod extends and abuts against the locking lever 12. At this time, the elbow clamp locks the locking lever 12 on one side. Under the action of the elbow clamp, the pressure roller 7 maintains a certain pressure on the circuit breaker pressure cylinder 14. Under the guiding action of the guide wheel 6 on the watch strap finger limit bracket 15... Pushing handle 3 causes the entire device to rotate around the central axis of the circuit breaker pressure cylinder 14 and along the direction of the remaining part of the watch strap finger limit bracket 15. The annular pressure groove 701 of the pressure roller 7 can evenly and efficiently squeeze the watch strap finger limit bracket 15 into the annular bracket groove 18 on the inner edge of the circuit breaker pressure cylinder 14. Pushing the elbow clamp handle upward releases the one-sided locking of the locking rod 12. Pushing the locking rod 12 causes the pressure block 5 to move away from the inner edge of the circuit breaker pressure cylinder 14. The device is then removed from the circuit breaker pressure cylinder 14, completing the installation of the watch strap finger limit bracket 15.

[0035] The embodiments of the present invention are not limited thereto. Based on the above description of the present invention, and in accordance with common technical knowledge and conventional means in the field, the invention can be modified, replaced or altered in various other forms without departing from the basic technical concept of the present invention, and all such modifications or alterations fall within the scope of protection of the present invention.

Claims

1. A mounting device for a contact finger limit bracket on a high-voltage circuit breaker, characterized in that: The watch includes a cylindrical mounting base, a connecting plate with a notch, a handle, a locking lever, a locking mechanism for locking the locking lever, a pressure block, a guide wheel, and a pressure wheel. The connecting plate is located at the upper end of the mounting base and forms an opening at the notch for the insertion of a watch strap finger limit bracket. The pressure block is radially slidably mounted within the mounting base. A radially extending elongated hole 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 lever passes through the elongated hole and connects to one end of the pressure block. The other end of the pressure block is rotatably mounted with side-by-side guide wheels. The guide wheel and pressure wheel are exposed in the opening. The handle is radially disposed on the outer wall of the mounting base. The pressure block is slidably installed through the guide block. The upper surface of the guide block has a radially penetrating sliding groove. The top surfaces of the two sides of the sliding groove are fixed to 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 pressure wheel are located in the U-shaped frame of the pressure block and can rotate about the vertical axis respectively.

2. The high-voltage circuit breaker meter strap contact finger limit bracket mounting device according to claim 1, characterized in that: The center of the pressure roller has an annular groove for uniformly pressing the watch strap finger limit bracket, and both ends of the pressure roller have rolling surfaces for rolling along the inner circular surface of the circuit breaker pressure cylinder.

3. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 2, characterized in that: The guide wheel has an annular guide groove in the middle of its surface that is adapted to the watch strap finger limit bracket, and both walls of the annular guide groove are inclined surfaces.

4. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 3, characterized in that: The outer diameter of the annular groove of the pressure roller is larger than the outer diameter of both ends of the guide wheel surface and smaller than the outer diameter of the rolling circular surface.

5. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 4, characterized in that: A guide ring made of elastic material is provided on the lower inner wall of the mounting base for contacting the top outer wall of the circuit breaker cylinder.

6. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 5, characterized in that: A limiting ring made of elastic material is provided on the inner surface of the connecting plate for contacting the top of the circuit breaker cylinder.

7. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 6, characterized in that: The pressure roller is provided with a self-lubricating and wear-resistant oil-free composite bearing bushing between itself and its shaft.

8. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 7, characterized in that: The locking mechanism is fixed to the upper surface of the connecting plate. The locking mechanism has a radially retractable top rod, and the central axis of the top rod, the pressure block, and the central axis of the elongated hole are on the same diameter. The top rod can extend and press against the locking rod after the locking rod moves into place to lock it, or the top rod can extend and press against the locking rod to push it and lock it after it moves into place.

9. The high-voltage circuit breaker meter band contact finger limit bracket mounting device according to claim 8, characterized in that: The handle is a pair of rods, one end of each rod is fixed to the outer wall of the mounting base, and the pair of rods are located on the same diameter.

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