Overtravel measuring device for universal circuit breaker
By designing an over-range measurement device suitable for universal circuit breakers of different sizes, the problem of lack of accurate measurement devices in the prior art is solved, and accurate measurement and judgment of over-range measurement of circuit breakers is achieved, and the reliability of use is improved.
Patent Information
- Application Number
- CN202411623314.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-02-07
AI Technical Summary
The existing universal circuit breakers lack the device to accurately measure their over-range in practical applications, which makes it impossible to effectively determine whether they meet the design standards, affecting the reliability of use.
A over-range measurement device including a T-type bracket, a T-type connecting rod, a single-type connecting rod, a roller, a nut and a spring is designed. By adjusting the position of the device, it can be suitable for circuit breakers of different sizes, and The actual overpass is calculated by measuring the position change of the device.
It realizes accurate measurement of over-range circuit breakers, can determine whether the circuit breaker meets the design standards, and improves the reliability of the circuit breaker.
Smart Images
Figure CN119394234A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of universal circuit breakers, and in particular to an overtravel measuring device for universal circuit breakers. Background Art
[0002] Universal circuit breakers are important control components in power systems. When a fault current appears in the system, the universal circuit breaker controller triggers the operating mechanism to drive the moving contact to open quickly, thereby cutting off the fault current and playing a protective role. Among the design parameters of universal circuit breakers, overtravel is an important indicator. Overtravel refers to the distance that the moving and static contacts of a universal circuit breaker need to move from the beginning of contact to complete separation during the operation process. It is one of the important factors affecting the flexibility and performance of the circuit breaker. It is a factor that ensures the reliability of the circuit breaker closing and the continued reliable closing of the circuit breaker in the case of contact wear.
[0003] At present, due to the structure of the universal circuit breaker itself, in actual operation, the overtravel is basically referred to its design parameters. There is no measuring device to accurately measure the actual overtravel of each or each batch of universal circuit breakers to determine whether they meet the design standards. Summary of the invention
[0004] The purpose of this application is to provide a universal circuit breaker overtravel measuring device to overcome the shortcomings of the prior art. The measuring device is applicable to circuit breakers of different sizes by setting structures such as a T-shaped bracket, a T-shaped connecting rod, a straight connecting rod, a roller, a nut and a retaining spring, and can accurately measure the actual overtravel thereof, thereby improving the reliability of the use of the universal circuit breaker.
[0005] A universal circuit breaker overtravel measuring device proposed in the present application includes a T-shaped bracket, a T-shaped connecting rod and a straight-line connecting rod, wherein the T-shaped bracket includes a horizontal plane and a vertical plane, the horizontal plane is provided with a rectangular groove, the vertical plane is connected to the upper surface of the horizontal plane, and the vertical plane is provided with a bracket boss; the T-shaped connecting rod includes a horizontal section and a vertical section, the horizontal section is provided with a horizontal section waist circular groove, the vertical section is provided with a connecting rod boss, and the horizontal section waist circular groove is installed on the bracket boss; a measuring end is provided at one end of the straight-line connecting rod, and a connecting rod waist circular groove is provided at the other end, and the connecting rod waist circular groove is installed on the connecting rod boss.
[0006] Preferably, rollers are installed on both the bracket boss and the connecting rod boss.
[0007] Preferably, the bracket boss includes bracket boss one and bracket boss two, a nut is installed on the end of bracket boss one, a retaining ring groove is provided on bracket boss two, and bracket boss one and bracket boss two are horizontally spaced apart and arranged on the vertical plane of the T-shaped bracket.
[0008] Preferably, the transverse waist-round groove includes waist-round groove one and waist-round groove two, the waist-round groove one is installed on the bracket boss one, the waist-round groove two is installed on the bracket boss two, and a retaining spring is installed in the retaining spring groove.
[0009] Preferably, the connecting rod boss comprises connecting rod boss 1 and connecting rod boss 2, nuts are installed at the ends of connecting rod boss 1 and connecting rod boss 2, and connecting rod boss 1 and connecting rod boss 2 are vertically spaced apart and arranged on the vertical section of the T-shaped connecting rod.
[0010] Preferably, the connecting rod waist groove includes waist groove three and waist groove four, the waist groove three is installed on the connecting rod boss one, and the waist groove four is installed on the connecting rod boss two.
[0011] Preferably, the T-shaped connecting rod is also provided with a handle.
[0012] The present application also includes a universal circuit breaker overtravel measurement method, comprising the following steps:
[0013] Close the circuit breaker and place the measuring device on the base plate at the incoming line end of the circuit breaker;
[0014] Adjust the position of the straight-shaped connecting rod so that the measuring end is located at the head of the moving contact of the circuit breaker in the vertical direction, and then lock the position of the straight-shaped connecting rod with the nut;
[0015] Adjust the position of the T-type connecting rod by the handle so that the measuring end is located at the head of the moving contact of the circuit breaker in the horizontal direction, and then lock the position of the T-type connecting rod with the nut;
[0016] Measure the distance from the end of the T-shaped connecting rod handle to the right edge of the vertical surface of the T-shaped bracket to obtain dimension one, H1;
[0017] Open the circuit breaker, remove the static contact of the circuit breaker, close it again, loosen the nut, repeat the above operation to adjust the position of the measuring device, and measure the distance from the end of the T-type connecting rod handle to the right edge of the vertical surface of the T-type bracket again to obtain the second dimension, H2;
[0018] Calculate the coefficient K, K = X / W, where X is the distance from the rotation center of the moving contact to the contact point between the moving and static contacts, and W is the distance from the rotation center to the head of the moving contact;
[0019] Calculate the overtravel, overtravel = (H2-H1)×K.
[0020] Compared with the prior art, the present application has the following beneficial effects:
[0021] First, the measuring device includes a T-shaped bracket, a T-shaped connecting rod, a straight connecting rod, a roller, a nut and a retaining ring. The T-shaped connecting rod is movably connected to the T-shaped bracket, and the T-shaped connecting rod can move freely in the horizontal direction; the straight connecting rod is movably connected to the T-shaped connecting rod, and the straight connecting rod can move freely in the vertical direction. By adjusting the positions of the various components of the measuring device, it can be suitable for universal circuit breakers of different sizes, so it has a wide range of applications.
[0022] Second, the measuring device has a simple structure. The T-shaped bracket, T-shaped connecting rod and I-shaped connecting rod are connected by bosses and waist grooves and fastened by nuts. It is easy to install and disassemble. This modular structure is also convenient for production and use and has strong practicality.
[0023] Third, the present application provides a method for measuring the overtravel of a universal circuit breaker, by measuring the distance H1 from the end of the T-type connecting rod handle to the right edge of the vertical surface of the T-type bracket when there is a static contact, and the above distance H2 when there is no static contact, and then calculating the actual overtravel through the conversion coefficient K, overtravel = (H2-H1) × K. This method can accurately measure the actual overtravel parameters of the universal circuit breaker, determine whether it meets the design standards, and improve the reliability of the use of the universal circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 This is a structural schematic diagram of a universal circuit breaker overtravel measurement device proposed in this application.
[0025] Figure 2 This is a schematic diagram of the T-shaped bracket structure of this application.
[0026] Figure 3 This is a schematic diagram of the T-type connecting rod structure of this application.
[0027] Figure 4 This is a schematic diagram of the I-shaped connecting rod structure of this application.
[0028] Figure 5 Dimensional state diagrams were measured for this application.
[0029] Illustrations: 1. T-shaped bracket; 2. T-shaped connecting rod; 3. I-shaped connecting rod; 4. Roller; 5. Nut; 6. Circlip; 7. Circlip groove; 11. Horizontal plane; 12. Vertical plane; 21. Horizontal section; 22. Vertical section; 23. Handle; 31. Measuring end; 11-1. Rectangular groove; 12-1. Bracket boss one; 12-2. Bracket boss two; 21-1. Waist round groove one; 21-2. Waist round groove two; 22-1. Connecting rod boss one; 22-2. Connecting rod boss two; 3-1. Waist round groove three; 3-2. Waist round groove four. DETAILED DESCRIPTION
[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0031] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0033] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0034] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0036] Refer to the attached Figure 1-Figure 5 , Figure 1 A schematic structural diagram of a universal circuit breaker overtravel measuring device in an embodiment of the present application is shown, including a T-shaped bracket 1, a T-shaped connecting rod 2, a straight connecting rod 3, several rollers 4, several nuts 5, a retaining spring 6 and other components.
[0037] like Figure 2 As shown, the T-shaped bracket 1 is a T-shaped structure, which includes a horizontal plane 11 and a vertical plane 12. The horizontal plane 11 is provided with a rectangular groove 11-1 for making way for the I-shaped connecting rod 3; the vertical plane 12 is connected to the right side of the upper surface of the horizontal plane 11 and in front of the rectangular groove 11-1, and the vertical plane 12 is provided with a bracket boss 1 12-1 and a bracket boss 2 12-2. The bracket boss is used to install the roller 4 and the T-shaped connecting rod 2, and the bracket boss 2 12-2 is provided with a retaining spring groove 7 for installing the retaining spring 6.
[0038] like Figure 3As shown, the T-type connecting rod 2 is a T-shaped structure, which includes a horizontal section 21 and a vertical section 22. The horizontal section 21 is provided with a waisted round groove 1 21-1 and a waisted round groove 21-2. The waisted round groove 1 21-1 is located on the left side of the vertical section 22, and the waisted round groove 21-2 is located on the right side of the vertical section 22. The waisted round groove 1 21-1 is installed on the bracket boss 1 12-1, and the waisted round groove 21-2 is installed on the bracket boss 2 12-2; the vertical section 22 is provided with a connecting rod boss 1 22-1 and a connecting rod boss 2 22-2. The connecting rod boss is used to install the roller 4 and the straight connecting rod 3. The connecting rod boss 1 22-1 is located between the two waisted round grooves 21-1 and 21-2, and the connecting rod boss 2 22-2 is located below the connecting rod boss 1 22-1. A handle 23 is provided at one end of the horizontal section 21, and the T-type connecting rod 2 can be moved horizontally by the handle 23.
[0039] like Figure 4 As shown, the straight-line connecting rod 3 is in a straight-line structure, and a measuring end 31 is arranged at one end thereof, and the measuring end 31 is placed on the head of the moving contact of the circuit breaker during measurement. The other end of the straight-line connecting rod 3 is provided with a waist round groove 3-1 and a waist round groove 4-3-2 from top to bottom, and the waist round groove 4-3-2 is located below the waist round groove 3-1, the waist round groove 3-1 is installed on the connecting rod boss 1 22-1, and the waist round groove 4-3-2 is installed on the connecting rod boss 2 22-2.
[0040] During the installation process, first install the roller 4 on the bracket bosses 12-1 and 12-2, then install the two waist-shaped grooves set on the cross section 21 of the T-shaped connecting rod 2 on the two bracket bosses accordingly, and make the inner wall of the waist-shaped groove stick to the roller 4, push the handle 23 to move the T-shaped connecting rod 2 horizontally, then put the nut 5 on the end of the bracket boss 12-1, and install the retaining ring 6 on the retaining ring groove 7 of the bracket boss 12-2. At this time, tighten the nut to fix the position of the T-shaped connecting rod.
[0041] The roller 4 is installed on the connecting rod bosses 22-1 and 22-2, and then the two waist grooves of the straight connecting rod 3 are correspondingly installed on the two connecting rod bosses, and the inner wall of the waist groove of the straight connecting rod 3 is attached to the roller 4, and the straight connecting rod 3 can move in the vertical direction, and then the nut 5 is installed at the ends of the two connecting rod bosses. At this time, tightening the nut can fix the position of the straight connecting rod. The vertical section 22 of the T-shaped connecting rod 2 can move the straight connecting rod 3 left and right in the rectangular groove 11-1.
[0042] Figure 5 The measurement state of an embodiment of the present application is shown. The left figure is a schematic diagram of the position of the measuring device and the measurement size when there is a static contact, and the right figure is a schematic diagram of the position of the measuring device and the measurement size when there is no static contact. The overtravel measurement method of the device is as follows:
[0043] Close the circuit breaker and place the measuring device on the base plate of the circuit breaker inlet. Adjust the position of the straight-line connecting rod 3 so that its measuring end 31 is located above the end of the moving contact in the vertical direction. After adjusting the position, tighten the nuts 5 on the connecting rod bosses 22-1 and 22-2 to lock the position of the straight-line connecting rod 3. Then move the T-shaped connecting rod 2 horizontally through the handle 23, adjust the position of the T-shaped connecting rod 2 so that the measuring end 31 is located above the end of the moving contact in the horizontal direction. After adjusting the position, tighten the nuts 5 on the bracket bosses 12-1 and 12-2 to lock the position of the T-shaped connecting rod 2. Measure the distance between the end of the handle of the T-shaped connecting rod 2 and the right edge of the vertical plane of the T-shaped bracket 1 to obtain dimension one, H1. Open the circuit breaker, remove the static contact device of the circuit breaker, and then close the circuit breaker. At this time, unlock the locking nut 5 on the bracket boss and the connecting rod boss, adjust the position of the T-type connecting rod 2 and the straight connecting rod 3 in the same way as above, and measure the distance between the end of the handle of the T-type connecting rod 2 and the right edge of the vertical plane of the T-type bracket 1 again to obtain the second dimension, H2. Since the measurement is the head of the moving contact, not the contact point of the moving and static contacts, a coefficient K needs to be converted between the two, K = X / W, where X is the dimension from the rotation center of the moving contact to the contact point of the moving and static contacts, and W is the distance from the rotation center to the head of the moving contact. Finally, calculate the overtravel, overtravel = (H2-H1) × K.
[0044] The structure of the present application can be adjusted for circuit breakers of different sizes, has a simple structure and is easy to use.
[0045] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0046] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A universal circuit breaker overtravel measuring device, characterized in that: Including T-shaped bracket, T-shaped connecting rod and straight connecting rod, The T-shaped bracket includes a horizontal surface and a vertical surface, the horizontal surface is provided with a rectangular groove, the vertical surface is connected to the upper surface of the horizontal surface, and the vertical surface is provided with a bracket boss; The T-shaped connecting rod comprises a horizontal section and a vertical section, the horizontal section is provided with a horizontal section waist round groove, the vertical section is provided with a connecting rod boss, and the horizontal section waist round groove is installed on the bracket boss; A measuring end is arranged at one end of the straight-line connecting rod, and a connecting rod waist circular groove is arranged at the other end, and the connecting rod waist circular groove is installed on the connecting rod boss.
2. The universal circuit breaker overtravel measuring device according to claim 1, characterized in that: Rollers are installed on the bracket boss and the connecting rod boss.
3. The universal circuit breaker overtravel measuring device according to claim 1, characterized in that: The bracket boss comprises a bracket boss 1 and a bracket boss 2, a nut is installed at the end of the bracket boss 1, a retaining ring groove is arranged on the bracket boss 2, and the bracket boss 1 and the bracket boss 2 are arranged horizontally and spaced apart on the vertical plane of the T-shaped bracket.
4. The universal circuit breaker overtravel measuring device according to claim 3, characterized in that: The transverse waist round groove includes waist round groove 1 and waist round groove 2, wherein the waist round groove 1 is installed on the bracket boss 1, and the waist round groove 2 is installed on the bracket boss 2, and a retaining spring is installed in the retaining spring groove.
5. The universal circuit breaker overtravel measuring device according to claim 4, characterized in that: The connecting rod boss comprises a connecting rod boss 1 and a connecting rod boss 2, nuts are installed at the ends of the connecting rod boss 1 and the connecting rod boss 2, and the connecting rod boss 1 and the connecting rod boss 2 are arranged vertically and spaced apart on the vertical section of the T-shaped connecting rod.
6. The universal circuit breaker overtravel measuring device according to claim 5, characterized in that: The connecting rod waist round groove includes waist round groove three and waist round groove four, the waist round groove three is installed on the connecting rod boss one, and the waist round groove four is installed on the connecting rod boss two.
7. The universal circuit breaker overtravel measuring device according to claim 6, characterized in that: The T-shaped connecting rod is also provided with a handle.
8. A measurement method using the universal circuit breaker overtravel measurement device according to claim 7, the method comprising the following steps: Close the circuit breaker and place the measuring device on the base plate at the incoming line end of the circuit breaker; Adjust the position of the straight-shaped connecting rod so that the measuring end is located at the head of the moving contact of the circuit breaker in the vertical direction, and then lock the position of the straight-shaped connecting rod with the nut; Adjust the position of the T-type connecting rod by the handle so that the measuring end is located at the head of the moving contact of the circuit breaker in the horizontal direction, and then lock the position of the T-type connecting rod with the nut; Measure the distance from the end of the T-shaped connecting rod handle to the right edge of the vertical surface of the T-shaped bracket to obtain dimension one, H1; Open the circuit breaker, remove the static contact of the circuit breaker, close it again, loosen the nut, repeat the above operation to adjust the position of the measuring device, and measure the distance from the end of the T-type connecting rod handle to the right edge of the vertical surface of the T-type bracket again to obtain the second dimension, H2; Calculate the coefficient K, K = X / W, where X is the distance from the rotation center of the moving contact to the contact point between the moving and static contacts, and W is the distance from the rotation center to the head of the moving contact; Calculate the overtravel, overtravel = (H2-H1)×K.