Mechanical characteristic on-line monitoring device of Siemens high-voltage circuit breaker

Abstract

The utility model relates to a mechanical characteristic on-line monitoring device of a Siemens high-voltage circuit breaker. The mechanical characteristic on-line monitoring device comprises an extension shaft plate, a mechanical characteristic sensor and a cover plate, the extension shaft plate comprises a connecting plate and an extension shaft vertically arranged on the connecting plate; two connecting holes corresponding to the process holes in the lever are formed in the connecting plate; the mechanical characteristic sensor is of a hollow shaft structure, is arranged on the extension shaft in a sleeving mode and is fixed through a jackscrew. The cover plate is mounted on the cover plate mounting holes through a plurality of locking pieces, and is connected with a bracket of the mechanical characteristic sensor through a connecting piece; according to the utility model, the extension shaft plate is installed through the auxiliary hole on the original lever of the circuit breaker, so that the extension shaft plate is connected with the mechanical characteristic sensor adopting a hollow shaft structure, and the mechanical characteristic sensor is connected with the cover plate through the support of the mechanical characteristic sensor, thereby solving the problem of installation of the mechanical characteristic sensor of the Siemens 3AP1FG high-voltage SF6 circuit breaker. Therefore, on-line monitoring of the mechanical characteristics of the circuit breaker is realized.

Description

Technical Field

[0001] The utility model relates to the field of circuit breaker monitoring, in particular to an online monitoring device for the mechanical characteristics of a Siemens high-voltage circuit breaker. Background Art

[0002] Among my country's power transmission and distribution equipment, armored switchgear is the most numerous and widely used. The core component of armored switchgear is the circuit breaker, with the SF6 circuit breaker performing the switchgear's most critical high-voltage (72.5kV and 140kV) on-off control function. Key mechanical performance parameters during the SF6 circuit breaker opening and closing process, such as travel, speed, opening distance, overtravel, and rebound, provide a direct indicator of the circuit breaker's status.

[0003] Real-time monitoring of circuit breaker mechanical characteristics is the core of online monitoring. To obtain the mechanical characteristic parameters of a circuit breaker, it is crucial to install a mechanical characteristic sensor on the main shaft without changing the original mechanical structure of the circuit breaker.

[0004] Due to the significant differences in the structures of SF6 circuit breakers produced by different manufacturers, even SF6 circuit breakers of the same structure but different models from the same manufacturer have significant differences in structural dimensions. For example, the mechanical movement of the Siemens (3AP1FG) high-voltage SF6 circuit breaker is very fast and complex, requiring suitable sensors for dynamic monitoring. However, due to the constraints of the circuit breaker structure, how to install mechanical characteristic sensors in a limited space without changing the original mechanical structure of the circuit breaker becomes a challenge. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an online monitoring device for the mechanical characteristics of a Siemens high-voltage circuit breaker, so as to solve the problem of installing a displacement sensor for a Siemens 3AP1FG high-voltage SF6 circuit breaker.

[0006] To achieve the above objectives, the present invention adopts a technical solution: an online monitoring device for the mechanical characteristics of a Siemens high-voltage circuit breaker, comprising a crossbeam, three poles mounted on the crossbeam, and a transmission unit disposed within the crossbeam and connected to the three poles. Each set of the transmission units includes a lever connected to the circuit breaker's rotating shaft. The levers are provided with two process holes centered on the circuit breaker's rotating shaft. Each lever on the side of the crossbeam has a cover mounting hole.

[0007] The mechanical property online monitoring device comprises an extension shaft plate, a mechanical property sensor and a cover plate;

[0008] The extension shaft plate includes a connecting plate and an extension shaft vertically arranged on the connecting plate; the connecting plate is provided with two connecting holes corresponding to the process holes on the lever, and the extension shaft plate is fixed to the lever by screws passing through the connecting holes and the process holes;

[0009] The mechanical property sensor is a hollow shaft structure, sleeved on the extension shaft and fixed by a top screw;

[0010] The cover plate is mounted on the cover plate mounting hole through a plurality of locking members, and is connected to the bracket provided with the mechanical property sensor through a connecting member.

[0011] Preferably, the size of the cover plate is larger than the size of the cover plate mounting hole, and a plurality of evenly distributed first locking holes for connecting the locking members are provided on the edge of the cover plate that does not overlap with the cover plate mounting hole.

[0012] Preferably, the locking member includes a locking plate and a screw, washer and nut set; a second locking hole is provided on the locking plate; the screw, washer and nut set passes through the first locking hole and the second locking hole and uses the locking plate to fix the cover plate on the beam.

[0013] Preferably, the second locking hole is provided at one end of the locking plate; and the other end of the locking plate is provided with anti-slip grooves.

[0014] Preferably, the cover plate is further provided with a fixing hole connected to a bracket provided with the mechanical property sensor;

[0015] The connecting piece includes two lengthened nuts; both ends of the lengthened nuts are connected to the cover plate and the bracket of the mechanical property sensor through screws respectively.

[0016] Preferably, the mechanical property sensor uses a rotary encoder to monitor the rotating main shaft of the SF6 circuit breaker.

[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0018] 1. This utility model utilizes the process hole on the original lever of the circuit breaker to install an extended shaft plate, which is connected to a mechanical characteristic sensor with a hollow shaft structure. At the same time, the mechanical characteristic sensor is connected to the cover plate via its own bracket. Without changing the original mechanical structure of the circuit breaker, this solves the problem of adding a mechanical characteristic sensor to the Siemens 3AP1FG high-voltage SF6 circuit breaker, realizes online monitoring of the mechanical characteristics of the circuit breaker, provides data support for predicting the circuit breaker status, and has the advantages of a simple and compact structure.

[0019] 2. The cover plate of the utility model is installed on the crossbeam of the circuit breaker through multiple locking parts, which is not only easy to process, but also easy to install and disassemble;

[0020] 3. The utility model is beneficial to the maintenance of circuit breakers, reduces maintenance costs and time, and is beneficial to the stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technical solution of the utility model is further described below with reference to the accompanying drawings:

[0022] Attachment Figure 1 This is a partial structural diagram of the Siemens high-voltage circuit breaker described in the present invention with the cover removed;

[0023] Attachment Figure 2 This is a cross-sectional view of the mechanical property online monitoring device after installation;

[0024] Attachment Figure 3 This is a structural diagram of the mechanical property online monitoring device of the present invention after installation with the cover removed;

[0025] Attachment Figure 4 This is a structural diagram of the mechanical property online monitoring device of the present invention after the cover plate is installed;

[0026] Attachment Figure 5 This is a schematic structural diagram of the connecting plate in the present utility model;

[0027] Attachment Figure 6 This is a schematic diagram of the structure of the mechanical property sensor in the present utility model;

[0028] Attachment Figure 7 This is a schematic structural diagram of the cover plate in the present invention;

[0029] Attachment Figure 8 It is a structural schematic diagram of the locking piece in the utility model.

[0030] Among them: 1. Beam; 11. Lever; 12. Process hole; 13. Cover plate mounting hole; 14. Circuit breaker rotating shaft; 2. Extension shaft plate; 21. Connecting plate; 22. Extension shaft; 23. Connecting hole; 3. Mechanical property sensor; 31. Bracket; 4. Cover plate; 41. First locking hole; 42. Fixing hole; 5. Locking plate; 51. Second locking hole; 52. Anti-slip groove; 6. Screw, washer and nut set; 7. Extension nut. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1-2As shown, the Siemens high-voltage circuit breaker includes a crossbeam 1, three poles respectively mounted on the crossbeam 1, and a transmission unit disposed within the crossbeam 1 and connected to the three poles. Each transmission unit includes a lever 11 connected to a circuit breaker rotating shaft 14. The lever 11 is provided with two process holes 12 centered on the circuit breaker rotating shaft 14. The side of the crossbeam 1 is provided with a cover plate mounting hole 13 on each lever 11.

[0033] like Figure 2 as well as Figure 5-6 As shown, the mechanical property online monitoring device comprises an extension shaft plate 2, a mechanical property sensor 3 and a cover plate 4;

[0034] The extension shaft plate 2 includes a connecting plate 21 and an extension shaft 22 vertically arranged on the connecting plate 21; the connecting plate 21 is provided with two connecting holes 23 corresponding to the process holes 12 on the lever 11, and the extension shaft plate 2 is fixed to the lever 11 by screws passing through the connecting holes 23 and the process holes 12;

[0035] The mechanical property sensor 3 is a hollow shaft structure, which is sleeved on the extension shaft 22 and fixed by a top screw;

[0036] The cover plate 4 is mounted on the cover plate mounting hole 13 through a plurality of locking members, and is connected to the bracket 31 of the mechanical property sensor 3 through a connecting member;

[0037] The utility model utilizes the process hole 12 on the original lever 11 of the circuit breaker to install the extended shaft plate 2, so that it is connected to the mechanical characteristic sensor 3 adopting a hollow shaft structure. At the same time, the mechanical characteristic sensor 3 is connected to the cover plate 4 through the built-in bracket 31. On the basis of not changing the original mechanical structure of the circuit breaker, the utility model solves the problem of installing the mechanical characteristic sensor 3 of the Siemens 3AP1FG high-voltage SF6 circuit breaker, realizes the online monitoring of the mechanical characteristics of the circuit breaker, provides data support for the pre-judgment of the circuit breaker state, and has the advantages of simple and compact structure.

[0038] After being assembled, the mechanical characteristic sensor 3 rotates along with the circuit breaker rotating shaft 14 through the extension shaft plate 2 to calculate the rotation angle, rotation speed, rotation acceleration, and rotation displacement of the rotating shaft during the opening and closing process.

[0039] In this embodiment, due to the limited installation space of the circuit breaker, the mechanical property sensor 3 is selected to have an overall thickness of 23.5 mm, a middle hole diameter of 8 mm, and a corresponding diameter of the extension shaft 22 of 8 mm.

[0040] Furthermore, the mechanical characteristic sensor 3 uses a rotary encoder to monitor the rotating main shaft of the SF6 circuit breaker, obtain the angular displacement stroke information during the opening and closing process of the SF6 circuit breaker, and then extract the mechanical characteristic related parameters of the SF6 circuit breaker with the rotation angle as the analysis object;

[0041] If the obtained angular displacement information is multiplied by the rotation radius and transmission ratio of the rotating main shaft, the linear travel information of the circuit breaker opening and closing process can be obtained, and then the relevant parameters of the mechanical characteristics of the SF6 circuit breaker with the movement distance as the analysis object can be extracted.

[0042] Further, if Figure 7 As shown, the size of the cover plate 4 is larger than the size of the cover plate mounting hole 13, and the edge of the cover plate 4 that does not overlap with the cover plate mounting hole 13 is provided with a plurality of evenly distributed first locking holes 41 for connecting the locking member;

[0043] like Figure 8 As shown, the locking member includes a locking plate 5 and an M10 screw, washer and nut set 6; a second locking hole 51 is provided on the locking plate 5; the M10 screw, washer and nut set 6 passes through the first locking hole 41 and the second locking hole 51, and the cover plate 4 is fixed to the beam 1 using the locking plate 5;

[0044] During installation: the cover plate 4 is installed on the beam 1 by matching the locking piece 5 and the M10 screw, washer and nut set 6 to cover the cover plate mounting hole 13, that is, the locking piece 5 is located on the inner side of the cover plate mounting hole 13, and the cover plate 4 is located on the outer side of the cover plate mounting hole 13, which is not only easy to process, but also easy to install and disassemble.

[0045] Further, if Figure 8 As shown, the second locking hole 51 is provided at one end of the locking plate 5; the other end of the locking plate 5 is provided with an anti-slip pattern 52 to play an anti-slip role.

[0046] Further, if Figure 7 As shown, the cover plate 4 is further provided with a fixing hole 42 connected to the bracket 31 of the mechanical property sensor 3;

[0047] like Figure 2-3 As shown, the connecting member includes two lengthened nuts 7; both ends of the lengthened nuts 7 are connected to the cover plate 4 and the bracket 31 of the mechanical property sensor 3 respectively through screws.

[0048] Furthermore, the extension shaft plate 2, locking plate 5 and cover plate 4 are made of metal materials, preferably aluminum alloy, which has the advantages of light weight, high strength, corrosion resistance, good processing performance and the like.

[0049] Furthermore, the connecting plate 21 and the extension shaft 22 can be integrally formed and fixedly connected by welding.

[0050] The installation steps of the mechanical properties online monitoring device are as follows:

[0051] 1. Use the M6x10 hexagon socket head screw and washer combination to fix the extension shaft plate 2 to the lever 11 through the connection hole 23 and the process hole 12;

[0052] 2. Connect the M3x20 extended nut 7 to the bracket 31 of the mechanical property sensor 3 and secure them together with the M3x12 screw and washer combination (Note: do not tighten the screws at this time, just keep them in place). The mechanical property sensor 3 and the bracket 31 are connected with the M3x8 screw set.

[0053] 3. Fix the mechanical property sensor 3 to the extension shaft 22 with an M2.5x5 screw.

[0054] 4. Place the cover plate 4 on the cover plate mounting hole 13 on the beam 1, adjust the position of the cover plate 4, and check whether the M3x20 extended nut 7 and the fixing hole 42 meet the installation conditions (whether the fixing hole 42 is coaxial with the M3x20 extended nut 7);

[0055] 5. If step 4 meets the installation conditions, remove cover 4 and tighten the screws in step 2 and the top screws in step 3. If step 4 does not meet the installation conditions, remove cover 4 and adjust the installation positions in steps 2 and 3 until the installation requirements are met.

[0056] 6. Use the M10x35 screw, washer, nut set 6 and locking piece 5 to clamp the cover 4 onto the beam 1 (note: do not tighten it at this time, just keep it in position);

[0057] 7. Use M3x10 screws and custom square washers (optionally widened round washers that completely cover fixing hole 42) to fix the mechanical characteristic sensor 3 to the cover 4 (note: do not use excessive torque when tightening, just tighten it).

[0058] 8. Tighten the screw, washer and nut set 6 in step 6;

[0059] 9. After checking all installations, test run the circuit breaker several times. If there is no abnormality, the installation of the mechanical characteristics online monitoring device is completed.

[0060] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A device for online monitoring the mechanical characteristics of a Siemens high-voltage circuit breaker, comprising a crossbeam, three poles mounted on the crossbeam, and a transmission unit disposed within the crossbeam and connected to the three poles. Each transmission unit includes a lever connected to the circuit breaker's rotating shaft. The levers are provided with two process holes centered on the circuit breaker's rotating shaft. Each lever on the side of the crossbeam has a cover mounting hole. Its characteristics are: Includes an extension shaft plate, a mechanical property sensor, and a cover plate; The extension shaft plate includes a connecting plate and an extension shaft vertically arranged on the connecting plate; the connecting plate is provided with two connecting holes corresponding to the process holes on the lever, and the extension shaft plate is fixed to the lever by screws passing through the connecting holes and the process holes; The mechanical property sensor is a hollow shaft structure, sleeved on the extension shaft and fixed by a top screw; The cover plate is mounted on the cover plate mounting hole through a plurality of locking members, and is connected to the bracket provided with the mechanical property sensor through a connecting member.

2. The on-line monitoring device for mechanical characteristics of a Siemens high-voltage circuit breaker according to claim 1, characterized in that: The size of the cover plate is larger than the size of the cover plate mounting hole, and the edge of the cover plate that does not overlap with the cover plate mounting hole is provided with a plurality of evenly distributed first locking holes for connecting the locking member.

3. The on-line monitoring device for mechanical characteristics of a Siemens high-voltage circuit breaker according to claim 2, characterized in that: The locking piece includes a locking plate and a screw, washer and nut set; a second locking hole is provided on the locking plate; the screw, washer and nut set passes through the first locking hole and the second locking hole and uses the locking plate to fix the cover plate on the beam.

4. The on-line monitoring device for mechanical characteristics of a Siemens high-voltage circuit breaker according to claim 3, characterized in that: The second locking hole is provided at one end of the locking plate; and the other end of the locking plate is provided with anti-slip grooves.

5. The on-line monitoring device for mechanical characteristics of a Siemens high-voltage circuit breaker according to any one of claims 1 to 4, characterized in that: The cover plate is also provided with a fixing hole connected to the bracket provided with the mechanical property sensor; The connecting piece includes two lengthened nuts; both ends of the lengthened nuts are connected to the cover plate and the bracket of the mechanical property sensor through screws respectively.

6. The on-line monitoring device for mechanical characteristics of a Siemens high-voltage circuit breaker according to claim 1, characterized in that: The mechanical characteristic sensor adopts a rotary encoder to monitor the rotating main shaft of the SF6 circuit breaker.

Images