A circuit breaker wrench

Abstract

The utility model provides a kind of circuit breaker plum blossom contact replacement frock, it is related to electric power equipment operation and maintenance tool field, it includes the positioning shaft that can be plugged in fixed connector one end and the conical sleeve coaxially arranged in the outside of positioning shaft, the outer periphery of the positioning shaft is fixed with annular baffle ring, the conical sleeve is nested installation in the outside of positioning shaft, and the small head end of conical sleeve abuts in one end of annular baffle ring;The outside diameter of the small head end of conical sleeve is not greater than plum blossom contact initial state's hollow circular cavity inner diameter, the outside diameter of the big head end of conical sleeve is not less than the outer diameter of fixed connector, the utility model solves the technical problem that frock generality is poor in prior art, increases manufacturing cost and brings inconvenience to actual operation and maintenance.

Description

Technical Field

[0001] This utility model relates to the field of power equipment operation and maintenance tools, and in particular to a tooling for replacing the quincunx contacts of a circuit breaker. Background Technology

[0002] High-voltage circuit breakers are critical equipment in power systems, and their spline contacts, as core conductive components, require regular replacement to ensure power supply safety. The efficiency and accuracy of spline contact replacement directly affect the operation and maintenance costs and stability of the power system.

[0003] In the prior art, Chinese utility model patent CN208571383U discloses an installation tool for the contacts of a switchgear trolley, which includes a conical body, a positioning shaft, and a handle, all fixed together. In use, the positioning shaft is inserted into the hollow hole of the fixed connector for positioning. The small end of the conical body is used for the luffing contact to slide along the conical surface, utilizing the conical structure to open its spring coil, ultimately allowing the protrusion of the luffing contact to engage with the groove of the fixed connector to complete the installation. This tool, through its integrated design, allows for single-person operation, simplifies the traditional installation process, improves installation efficiency, and to some extent solves the cumbersome problems associated with multi-person collaboration.

[0004] However, in the aforementioned prior art, the conical body and the positioning shaft are a fixed integrated structure. For different specifications of plum blossom contacts, a complete set of installation tools of corresponding sizes is required. That is, different conical bodies need to be matched with different positioning shafts, resulting in poor tool versatility. This not only increases the manufacturing cost but also requires the storage of tools of various specifications, causing inconvenience to actual operation and maintenance. Utility Model Content

[0005] This application provides a tooling for replacing the pentagonal contact of a circuit breaker, which solves the technical problems of poor tooling versatility, increased manufacturing costs, and inconvenience to actual operation and maintenance in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a circuit breaker sprite contact replacement fixture, comprising a positioning shaft that can be inserted into one end of a fixed connector and a conical sleeve coaxially disposed outside the positioning shaft. An annular retaining ring is fixedly provided on the outer circumference of the positioning shaft, and the conical sleeve is nested and installed outside the positioning shaft, with the small end of the conical sleeve abutting against one end of the annular retaining ring. The outer diameter of the small end of the conical sleeve is not greater than the inner diameter of the hollow cavity of the sprite contact in its initial state, and the outer diameter of the large end of the conical sleeve is not less than the outer diameter of the fixed connector.

[0007] Because the positioning shaft and the tapered sleeve adopt a nested and separate structure, the tapered sleeve can be replaced separately to adapt to different specifications of plum blossom contacts. Therefore, the problem of poor tool versatility caused by the tapered body and the positioning shaft being fixed as one in the existing technology is solved. This reduces the types of tools that need to be equipped, lowers the manufacturing cost, and avoids the inconvenience of storing multiple specifications of tools.

[0008] As a further improvement to the above solution, the positioning shaft is provided with an external thread, and the small end of the tapered sleeve is provided with an internal thread, and the internal thread matches the external thread; thereby achieving a stable connection between the tapered sleeve and the positioning shaft, ensuring that the two remain coaxial during use, and guaranteeing the accuracy of the installation of the plum blossom contact.

[0009] As a further improvement to the above solution, a spring washer is also nested on the outer periphery of the positioning shaft. The spring washer is located between the small end of the tapered sleeve and the annular retaining ring. When the tapered sleeve is tightened by the threaded connection, the spring washer will be squeezed to generate an elastic reaction force. Therefore, it can effectively offset the vibration or external impact that may occur during the installation process, prevent the tapered sleeve from loosening between the positioning shaft, and ensure that the tapered sleeve always maintains a stable position during the installation of the plum blossom contact.

[0010] As a further improvement to the above solution, the front end of the positioning shaft is chamfered, and the outer periphery of the front part of the positioning shaft is provided with an annular groove. A rubber ring is installed in the annular groove, and the outer diameter of the rubber ring is larger than the inner diameter of the hollow hole on the fixed joint. The rubber ring can reduce the radial wobble of the positioning shaft by elastically squeezing and filling the gap, and ensure that the positioning shaft and the fixed joint maintain good coaxiality.

[0011] As a further improvement to the above solution, an installation reference line is provided on the outside of the tapered sleeve. The installation reference line is circular and surrounds the tapered sleeve. During the installation process, when the pendulum contact slides past the reference line, it indicates that its protrusion is close to the groove of the fixed connector. Therefore, it can provide the operator with an intuitive installation progress indicator, making it easy to accurately judge the assembly status of the pendulum contact and avoid damage to the components caused by excessive pushing.

[0012] As a further improvement to the above solution, the edge of the large end of the conical sleeve is provided with a rounded corner; since the large end of the conical sleeve may cause wear on the protruding edge of the pendant contact, this situation can be avoided by setting the rounded corner.

[0013] As a further improvement to the above solution, the tapered sleeve is made of Cr alloy steel; Cr alloy steel has a higher hardness than ordinary steel, which can improve the wear resistance of the tapered sleeve.

[0014] As a further improvement to the above scheme, the outer circumferential surface of the tapered sleeve has a polytetrafluoroethylene coating; the polytetrafluoroethylene coating can reduce the resistance when the plum blossom contact slides.

[0015] As can be seen from the above technical solutions, this utility model has at least the following technical effects or advantages: 1. Since the positioning shaft and the tapered sleeve adopt a nested and separate structure, the tapered sleeve can be replaced separately to adapt to different specifications of plum blossom contacts. Therefore, the problem of poor tool versatility caused by the fixed integral of the tapered body and the positioning shaft in the existing technology is solved, the number of tools required is reduced, the manufacturing cost is reduced, and the inconvenience of storing multiple specifications of tools is avoided.

[0016] 2. Because the positioning shaft has an external thread, and the small end of the tapered sleeve has an internal thread that matches the external thread, the tapered sleeve can be threaded onto the outside of the positioning shaft. Therefore, it not only achieves a stable connection between the tapered sleeve and the positioning shaft, ensuring that the two remain coaxial during use, but also guarantees the accuracy of the installation of the plum blossom contact.

[0017] 3. Because the outer circumference of the positioning shaft is nested with a spring washer located between the small end of the tapered sleeve and the annular retaining ring, when the tapered sleeve is tightened by the threaded connection, the spring washer will be squeezed to generate an elastic reaction force. Therefore, it can effectively offset the vibration or external impact that may occur during the installation process and prevent loosening between the tapered sleeve and the positioning shaft. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the conical sleeve structure; Figure 3 This is a schematic diagram of the positioning shaft. Figure 4 This is a schematic diagram illustrating the use of this utility model before the installation of the plum blossom contactor; Figure 5 This is a schematic diagram illustrating the use of the present invention during the installation of the plum blossom contactor; Figure 6 This is a schematic diagram showing the use of this utility model after the plum blossom contactor is installed.

[0019] Explanation of reference numerals in the attached drawings: 1. Positioning shaft; 101. Annular retaining ring; 102. External thread; 2. Tapered sleeve; 201. Internal thread; 202. Installation reference line; 3. Spring washer; 4. Rubber ring; 5. Fixed connector; 501. Groove; 6. Plum blossom contact; 601. Protrusion. Detailed Implementation To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this patent.

[0020] This utility model discloses a tooling for replacing the 6-shaped contact of a circuit breaker, such as... Figure 1 As shown, it includes a positioning shaft 1 and a tapered sleeve 2, which are coaxially assembled to enable quick replacement and installation of different specifications of plum blossom contacts 6. Among them, the positioning shaft 1 serves as the reference component of the entire tooling and is used to establish a connection with the fixed connector 5 of the circuit breaker; the tapered sleeve 2 serves as the guide and expansion component of the plum blossom contact 6, and its tapered structure enables the elastic opening and positioning assembly of the plum blossom contact 6.

[0021] The positioning shaft 1 adopts a cylindrical rod structure, with an annular retaining ring 101 integrally formed on its outer circumference near the center. This annular retaining ring 101 extends radially outward along the positioning shaft 1, forming a raised limiting structure. The annular retaining ring 101 provides an axial positioning reference for the tapered sleeve 2, ensuring that the tapered sleeve 2 can stably abut against its front end face in its natural state. The front end of the positioning shaft 1 is an insertion end, used to mate with the hollow hole of the fixed connector 5. The rear end can be equipped with a grip or connecting structure according to operational needs, to facilitate hand-holding by the operator or use with other auxiliary tools.

[0022] The tapered sleeve 2 adopts a frustum-shaped structure, with its diameter gradually increasing from one end to the other. The end with the smaller diameter is defined as the small end, and the end with the larger diameter is defined as the large end. The tapered sleeve 2 has a through hole along its axial direction. The inner diameter of the through hole matches the outer diameter of the positioning shaft 1, allowing the tapered sleeve 2 to be nested and installed outside the positioning shaft 1, and its position can be adjusted along the axial direction of the positioning shaft 1. In the assembled state, the small end of the tapered sleeve 2 faces the annular retaining ring 101, and the large end faces the front end of the positioning shaft 1. The small end naturally abuts against the front face of the annular retaining ring 101, forming the initial assembly position.

[0023] Specifically, the outer diameter of the small end is slightly smaller than the inner diameter of the hollow cavity of the plum blossom contact 6 in its initial state, to ensure that the plum blossom contact 6 can be smoothly fitted into the conical sleeve 2; the outer diameter of the large end is slightly larger than the outer diameter of the fixed connector 5, to ensure that the plum blossom contact 6 can accurately engage with the fixed connector 5 after sliding past the conical sleeve 2. This structure allows the conical sleeve 2 to smoothly expand the spring coil 602 of the plum blossom contact 6 during the installation process by gradually increasing its diameter, which avoids damage to components caused by excessive expansion and ensures that the expanded plum blossom contact 6 is accurately engaged with the fixed connector 5 under the action of spring force.

[0024] More specifically, such as Figure 2 , Figure 3 As shown, the connection between the positioning shaft 1 and the tapered sleeve 2 adopts a threaded fit structure. Specifically, the outer circumferential surface of the positioning shaft 1 is machined with an external thread 102 starting from the front end of the annular retaining ring 101. This external thread 102 adopts a common coarse thread design and has good self-locking performance. Correspondingly, the inner wall of the through hole at the small end of the tapered sleeve 2 is machined with an internal thread 201 that matches the external thread 102. By rotating the tapered sleeve 2, it can move freely along the axial direction of the positioning shaft 1, thereby adjusting the extension length of the tapered sleeve 2 relative to the positioning shaft 1. Thus, the threaded fit structure not only realizes the detachable design of the tapered sleeve 2, making it easy to replace the tapered sleeve 2 with the corresponding taper according to different specifications of the plum blossom contact 6, but also prevents the tapered sleeve 2 from loosening during installation through the self-locking characteristic of the thread, ensuring assembly stability.

[0025] To further enhance the anti-loosening performance of the connection between the tapered sleeve 2 and the positioning shaft 1, a spring washer 3 is nested around the outer periphery of the positioning shaft 1. The spring washer 3 is made of elastic metal material, its inner diameter matching the outer diameter of the positioning shaft 1, fitting snugly onto the positioning shaft 1, and clamped between the small end of the tapered sleeve 2 and the annular retaining ring 101. When the tapered sleeve 2 is tightened along the external thread 102, the spring washer 3 undergoes axial compression, generating elastic deformation, which in turn applies a continuous elastic reaction force to the tapered sleeve 2. This elastic force effectively counteracts vibrations or impacts that may occur during installation, preventing the tapered sleeve 2 from loosening due to external forces, thus ensuring that the tapered sleeve 2 maintains a stable position throughout the entire installation process.

[0026] In the specific structure of the positioning shaft 1, the front end of the positioning shaft 1 is chamfered. This chamfer guides the positioning shaft 1 to smoothly insert into the hollow hole of the fixed connector 5, reducing assembly resistance. Furthermore, the outer circumference of the front part of the positioning shaft 1 is provided with an annular groove, within which a rubber ring 4 is installed. The rubber ring 4 is made of a material with good elasticity and wear resistance, and its outer diameter in its free state is slightly larger than the inner diameter of the hollow hole of the fixed connector 5. When the front end of the positioning shaft 1 is inserted into the hollow hole of the fixed connector 5, the rubber ring 4 is compressed and undergoes elastic deformation, tightly filling the gap between the positioning shaft 1 and the hollow hole, thereby effectively reducing the radial wobble of the positioning shaft 1. This structure allows the positioning shaft 1 and the fixed connector 5 to maintain a high degree of coaxiality, providing a stable reference axis for the subsequent installation of the plum blossom contact 6, thus improving installation reliability.

[0027] In the specific structure of the conical sleeve 2, an installation reference line 202 is provided on the outside of the conical sleeve 2. This reference line surrounds the conical sleeve 2 in a circular shape. When the plum blossom contact 6 slides along the outer circumference of the conical sleeve 2 towards the large end and crosses this reference line, it indicates that the protrusion 601 of the plum blossom contact 6 has approached the groove 501 of the fixed connector 5. Therefore, the installation reference line provides the operator with a visual indication of the installation progress, enabling them to accurately judge the assembly status of the plum blossom contact 6 and avoid damage to the plum blossom contact 6 or the fixed connector 5 due to excessive pushing. Simultaneously...

[0028] Furthermore, the edge of the large end of the conical sleeve 2 is rounded, providing a smooth transition that allows the edge of the conical sleeve 2 to extend naturally from the outer periphery to the end face, eliminating sharp edges. During the installation of the plum blossom contact 6, when the plum blossom contact 6 slides past the large end of the conical sleeve 2, the edge of its elastic contact piece may come into contact with the edge of the conical sleeve 2. If the edge of the conical sleeve 2 is sharp, it can easily cause wear or scratches on the contact piece edge, affecting the conductivity and service life of the plum blossom contact 6. The rounded corner effectively avoids this situation, reducing frictional damage to the contact piece edge through smooth curved surface contact, protecting the structural integrity of the plum blossom contact 6, and extending its service life.

[0029] The tapered sleeve 2 is made of 40Cr alloy steel. Compared with ordinary carbon steel, 40Cr alloy steel has significantly improved hardness and wear resistance, and can withstand the continuous friction generated during the sliding of the plum blossom contact 6. It is not prone to wear or deformation, thereby extending the overall service life of the tooling and reducing the cost of use.

[0030] To further optimize the sliding performance between the plum blossom contact 6 and the conical sleeve 2, the outer circumferential surface of the conical sleeve 2 is also coated with a polytetrafluoroethylene (PTFE) coating. When the plum blossom contact 6 slides along the outer circumferential surface of the conical sleeve 2, the PTFE coating significantly reduces the frictional resistance between the two, allowing the operator to push the plum blossom contact 6 more easily and reducing operational intensity. Simultaneously, this low-friction characteristic also reduces frictional wear between the plum blossom contact 6 and the conical sleeve 2, thereby preventing damage to the plum blossom contact 6 due to excessive friction and further improving the reliability of the tooling.

[0031] Combination Figures 4 to 6 As shown, the actual operation of this tooling involves the following steps: First, select a tapered sleeve 2 with a corresponding taper according to the specifications of the replacement plum blossom contact 6. Second, install the selected tapered sleeve 2 on the outside of the positioning shaft 1 through a threaded fit, rotate the tapered sleeve 2 so that its small end abuts against the spring washer 3, and tighten it appropriately to ensure the stability of the tapered sleeve 2. Then, align the front end of the positioning shaft 1 with the hollow hole of the fixed connector 5, and use the chamfer at the front end to guide the positioning shaft 1 to insert smoothly until the rubber ring 4 is fully inserted into the hollow hole and forms a tight fit. At this time, the positioning shaft 1 and the fixed connector 5 remain coaxial. Next, align the hollow cavity of the plum blossom contact 6 with the small end of the tapered sleeve 2 and slip it on, slowly pushing the plum blossom contact 6 to slide along the outer circumference of the tapered sleeve 2 towards the large end. During the sliding process, the operator can judge the position of the plum blossom contact 6 by observing the installation reference line 202. When the plum blossom contact 6 crosses the installation reference line 202, it indicates that its protrusion 601 has approached the groove 501 of the fixed connector 5. Continue pushing the plum blossom contact 6 until it slides past the large end of the conical sleeve 2. At this time, the spring ring 602 of the plum blossom contact 6 contracts under its own elasticity, and its protrusion 601 will naturally engage in the groove 501 of the fixed connector 5, completing the entire installation process.

[0032] In the description of this utility model, the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "vertical," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this utility model and do not require that this utility model be constructed or operated in a specific orientation, and therefore should not be construed as limiting this utility model. The terms "connected" and "linked" in this utility model should be interpreted broadly. For example, they can refer to a connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in its embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A tooling for replacing the sprite contact of a circuit breaker, comprising a positioning shaft (1) that can be inserted into one end of a fixed connector (5) and a tapered sleeve (2) coaxially disposed outside the positioning shaft (1), characterized in that, The positioning shaft (1) is fixedly provided with an annular retaining ring (101) on its outer periphery. The conical sleeve (2) is nested and installed outside the positioning shaft (1), and the small end of the conical sleeve (2) abuts against one end of the annular retaining ring (101). The outer diameter of the small end of the conical sleeve (2) is not greater than the inner diameter of the hollow cavity of the plum blossom contact (6) in its initial state, and the outer diameter of the large end of the conical sleeve (2) is not less than the outer diameter of the fixed connector (5).

2. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The positioning shaft (1) has an external thread (102) on its outside, and the small end of the tapered sleeve (2) has an internal thread (201), and the internal thread (201) matches the external thread (102).

3. The circuit breaker sprite contact replacement fixture according to claim 2, characterized in that, The outer periphery of the positioning shaft (1) is also nested with a spring washer (3), which is located between the small end of the tapered sleeve (2) and the annular retaining ring (101).

4. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The front end of the positioning shaft (1) is chamfered, and the outer periphery of the front part of the positioning shaft (1) is provided with an annular groove. A rubber ring (4) is installed in the annular groove. The outer diameter of the rubber ring (4) is larger than the inner diameter of the hollow hole on the fixed joint (5).

5. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The tapered sleeve (2) has an installation reference line (202) on its outside. The installation reference line (202) is circular and surrounds the tapered sleeve (2) once.

6. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The edge of the large end of the conical sleeve (2) is rounded.

7. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The tapered sleeve (2) is made of 40Cr alloy steel.

8. The tooling for replacing the sprite-shaped contact of a circuit breaker according to claim 1, characterized in that, The outer circumferential surface of the conical sleeve (2) has a polytetrafluoroethylene coating.

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