On-line testing device for pole-mounted circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an on-line testing device for a pole-mounted circuit breaker. Comprising a vibration sensor; the vibration sensor is arranged on the lower fixing piece; the lower fixing piece comprises a lower fixing plate; the mounting grooves are formed in the two ends of the lower fixing plate, and the mounting grooves are connected with the pole-mounted circuit breaker through eyebolts; the mounting hole is formed in the lower fixing plate, and the vibration sensor is in threaded connection with the mounting hole. The upper fixing piece comprises an upper fixing plate which is connected with the magnet in a magnetic attraction mode. And the limiting hole is formed in the upper fixing plate and matched with the vibration sensor. Limiting grooves are formed in the two ends of the upper fixing plate and matched with the eyebolts. A clamping groove is formed in the lower end of the upper fixing plate, and the magnet is embedded into the clamping groove. The mounting groove is in a horizontal opening shape. The vibration sensor can be effectively prevented from loosening, and the quality of vibration signal acquisition is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an on-line testing device for pole-mounted circuit breakers. Background Technique

[0002] As a key control device in the power system, the mechanical vibration signals generated by the drive mechanism of the pole-mounted circuit breaker during opening and closing operations have significant characteristics. Research shows that during the repeated operation process under the same working conditions, the time-frequency characteristics and amplitude parameters of the vibration signals caused by the impact and friction of the drive components show stability, which provides a physical basis for establishing a mechanical state benchmark. The existing technology usually uses vibration sensors to collect the mechanical vibration waveforms during the operation of the circuit breaker, and diagnoses the abnormalities of the drive mechanism by comparing the characteristics under normal working conditions. When defects such as jamming, fracture or loosening of fasteners occur in the drive components, the timing distribution of the vibration signals will shift, the distribution of the impact energy in the frequency domain will be distorted, and at the same time, the amplitude parameters of the vibration signals will also change with the change of the opening and closing impact force. Compared with the traditional electrical parameter detection method, this vibration detection technology has the significant advantage of non-invasive measurement, and the sensor can be externally installed without affecting the operation of the circuit breaker body.

[0003] However, it is found in engineering practice that the installation base of the vibration sensor is prone to looseness after long-term service, which will lead to the deterioration of the mechanical coupling characteristics between the sensor and the circuit breaker to be measured, and then cause distortion of the vibration signal acquisition. Especially in complex outdoor working conditions, environmental factors such as temperature alternation and mechanical vibration will accelerate the relaxation process of the sensor installation structure, directly affecting the accuracy of mechanical state diagnosis. Content of the Utility Model

[0004] In order to solve the technical problems existing in the background technique, the utility model provides an on-line testing device for pole-mounted circuit breakers, which can effectively prevent the vibration sensor from loosening and ensure the quality of vibration signal acquisition.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] An on-line testing device for pole-mounted circuit breakers, comprising:

[0007] A vibration sensor;

[0008] A lower fixing member, on which the vibration sensor is installed;

[0009] The lower fixing member includes:

[0010] A lower fixing plate;

[0011] Installation grooves are opened at both ends of the lower fixing plate, and the installation grooves are connected to the pole-mounted circuit breaker through eyebolt.

[0012] Mounting holes are provided on the lower fixing plate, and the vibration sensor is threadedly connected to the mounting holes.

[0013] Furthermore, the lower fixing plate is provided with a positioning groove, and the eyebolt is embedded in the positioning groove.

[0014] Furthermore, the lower fixing plate is provided with a boss, and the mounting hole penetrates through the boss.

[0015] Furthermore, the two ends of the lower fixing plate are provided with downwardly bent flanges.

[0016] Furthermore, the lower fixing plate is provided with a magnet.

[0017] Furthermore, an upper fixing member is provided at the upper end of the lower fixing member;

[0018] The upper fixing member includes:

[0019] An upper fixing plate, which is magnetically attracted and connected to the magnet;

[0020] Limiting holes are provided on the upper fixing plate, and the limiting holes are matched with the vibration sensor.

[0021] Furthermore, limiting grooves are provided at the two ends of the upper fixing plate, and the limiting grooves are matched with the eyebolt.

[0022] Furthermore, a clamping groove is provided at the lower end of the upper fixing plate, and the magnet is inserted into the clamping groove.

[0023] Furthermore, the installation groove is horizontally open.

[0024] Advantages of the present utility model:

[0025] (1) The vibration sensor is reliably fixed on the pole-mounted circuit breaker, which can effectively prevent the vibration sensor from loosening and ensure the quality of vibration signal acquisition.

[0026] (2) By using the original eyebolt of the pole-mounted circuit breaker for connection and fixation, it can be directly installed and modified on the existing pole-mounted circuit breaker, with accurate positioning and no need to separately open connection holes. The connection method is simpler and the installation is more convenient.

[0027] (3) The upper fixing member can position the eyebolt and the vibration sensor to prevent them from loosening, so that a reliable connection is maintained between the vibration sensor and the pole-mounted circuit breaker, ensuring the quality of vibration signal acquisition of the vibration sensor.

[0028] (4) The vibration sensor and the lower fixing member are connected by threads, the lower fixing member and the pole-mounted circuit breaker are connected and fixed by the original eyebolt of the pole-mounted circuit breaker, and the upper fixing member and the lower fixing member are magnetically attracted and connected. The installation method is simple and convenient. Description of the Drawings

[0029] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] Figure 1 is a schematic structural view of the present utility model;

[0031] Figure 2 is an exploded view of the present utility model Figure 1 ;

[0032] Figure 3 is an exploded view of the present utility model Figure 2 ;

[0033] Figure 4 is an installation position view of the present utility model.

[0034] In the figure:

[0035] 1. Vibration sensor, 2. Upper fixing member, 3. Lower fixing member, 4. Eye bolt;

[0036] 201. Upper fixing plate, 202. Limiting hole, 203. Limiting groove, 204. Card slot;

[0037] 301. Lower fixing plate, 302. Installation hole, 303. Boss, 304. Magnet, 305. Installation groove, 306. Flange, 307. Positioning groove. Specific embodiments

[0038] The present utility model will be further described in detail below in conjunction with the accompanying drawings.

[0039] An on-line testing device for a pole-mounted circuit breaker includes a vibration sensor 1, and the vibration sensor 1 can detect the vibration of the pole-mounted circuit breaker. The abnormality of the pole-mounted circuit breaker is diagnosed by comparing the characteristics under normal working conditions. The vibration sensor 1 is installed on the lower fixing member 3. The lower fixing member 3 is fixedly connected to the pole-mounted circuit breaker. The vibration sensor 1 is reliably fixed on the pole-mounted circuit breaker through the lower fixing member 3, which can effectively prevent the vibration sensor 1 from loosening and ensure the quality of vibration signal acquisition.

[0040] The specific structure of the lower fixing member 3 includes a lower fixing plate 301. Installation grooves 305 are opened at both ends of the lower fixing plate 301, and the installation grooves 305 are connected to the pole-mounted circuit breaker through an eye bolt 4. The eye bolt 4 is an original component of the pole-mounted circuit breaker. By connecting and fixing through the original eye bolt 4 of the pole-mounted circuit breaker, the installation and transformation can be directly carried out on the existing pole-mounted circuit breaker, with accurate positioning, no need to separately open connection holes, simpler connection method, and more convenient installation.

[0041] Installation holes 302 are opened on the lower fixing plate 301, and the vibration sensor 1 is threadedly connected to the installation holes 302. The vibration sensor 1 is connected and fixed to the lower fixing member 3 through the installation holes 302.

[0042] To facilitate the installation of the lower fixing member 3, the installation groove 305 is horizontally open. Without completely unscrewing the original lifting ring bolt 4 of the pole-mounted circuit breaker, the lower fixing member 3 can be installed on the lifting ring bolt 4, and then the lifting ring bolt 4 can be tightened to fix the lower fixing member 3 to the pole-mounted circuit breaker. This saves installation steps and makes the installation more convenient.

[0043] The lower fixing plate 301 is provided with a positioning groove 307. The positioning groove 307 is circular, and the size of the positioning groove 307 is slightly larger than the lifting ring end of the lifting ring bolt 4. The lifting ring end of the lifting ring bolt 4 can be embedded in the positioning groove 307, thereby further playing a positioning role.

[0044] The lower fixing plate 301 is provided with a boss 303. The boss 303 is a regular hexagon, and the mounting hole 302 penetrates through the boss 303. Through the boss 303, it is more convenient to thread-connect the vibration sensor 1 with the mounting hole 302. And the connection strength between the vibration sensor 1 and the lower fixing member 3 is enhanced. The lower end of the vibration sensor 1 passes through the mounting hole 302 and directly abuts against the upper end face of the pole-mounted circuit breaker.

[0045] Both ends of the lower fixing plate 301 are provided with downwardly curved flanges 306. The flanges 306 can be clamped with the front and rear end faces of the pole-mounted circuit breaker, thereby further improving the connection strength and positioning accuracy between the lower fixing member 3 and the pole-mounted circuit breaker.

[0046] The lower fixing plate 301 is provided with a magnet 304. The magnet 304 can magnetically attract the lower fixing member 3 to the upper end face of the pole-mounted circuit breaker, enhancing the connection strength between the lower fixing member 3 and the pole-mounted circuit breaker.

[0047] The upper end of the lower fixing member 3 is provided with an upper fixing member 2. The upper fixing member 2 includes an upper fixing plate 201, and the upper fixing plate 201 is magnetically connected to the magnet 304. A limiting hole 202 is opened on the upper fixing plate 201. The limiting hole 202 matches the vibration sensor 1. When the limiting hole 202 is sleeved on the vibration sensor 1, it can limit the rotation of the vibration sensor 1 and prevent looseness between the vibration sensor 1 and the lower fixing member 3. Limiting grooves 203 are opened at both ends of the upper fixing plate 201. The limiting grooves 203 match the lifting ring bolt 4. When the limiting grooves 203 are sleeved on the lifting ring bolt 4, it can limit the rotation of the lifting ring bolt 4 and prevent looseness between the lower fixing member 3 and the pole-mounted circuit breaker.

[0048] A clamping groove 204 is opened at the lower end of the upper fixing plate 201, and the magnet 304 is inserted into the clamping groove 204. Thereby, the relative positions of the upper fixing member 2 and the lower fixing member 3 are fixed. Prevent the upper fixing member 2 from rotating horizontally.

[0049] The upper fixing member 2 can position the eyebolt 4 and the vibration sensor 1 to prevent the eyebolt 4 and the vibration sensor 1 from loosening, so as to maintain a reliable connection between the vibration sensor 1 and the pole-mounted circuit breaker and ensure the quality of vibration signal acquisition of the vibration sensor 1.

[0050] The vibration sensor 1 and the lower fixing member 3 are connected by threads. The lower fixing member 3 and the pole-mounted circuit breaker are connected and fixed through the original eyebolt 4 of the pole-mounted circuit breaker. The upper fixing member 2 and the lower fixing member 3 are magnetically connected, and the installation method is simple and convenient.

[0051] Inspired by the ideal embodiments of the present utility model described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An on-line testing device for pole-mounted circuit breakers, characterized in that Comprising: A vibration sensor (1); A lower fixing member (3), on which the vibration sensor (1) is installed; The lower fixing member (3) includes: A lower fixing plate (301); Mounting grooves (305) are opened at both ends of the lower fixing plate (301), and the mounting grooves (305) are connected to the pole-mounted circuit breaker through eyebolt (4); Mounting holes (302) are opened on the lower fixing plate (301), and the vibration sensor (1) is threadedly connected to the mounting holes (302).

2. The on-line testing device for a pole-mounted circuit breaker according to claim 1, characterized in that The lower fixing plate (301) is provided with a positioning groove (307), and the eyebolt (4) is embedded in the positioning groove (307).

3. The on-line testing device for a pole-mounted circuit breaker according to claim 1, characterized in that The lower fixing plate (301) is provided with a boss (303), and the mounting hole (302) penetrates through the boss (303).

4. The on-line testing device for a pole-mounted circuit breaker according to claim 1, characterized in that Both ends of the lower fixing plate (301) are provided with downwardly bent flanges (306).

5. The on-line testing device for a pole-mounted circuit breaker according to claim 1, characterized in that The lower fixing plate (301) is provided with a magnet (304).

6. The on-line testing device for a pole-mounted circuit breaker according to claim 5, characterized in that An upper fixing member (2) is provided at the upper end of the lower fixing member (3); The upper fixing member (2) includes: An upper fixing plate (201), which is magnetically connected to the magnet (304); Limit holes (202) are opened on the upper fixing plate (201), and the limit holes (202) match the vibration sensor (1).

7. The on-line testing device for a pole-mounted circuit breaker according to claim 6, characterized in that Limit grooves (203) are opened at both ends of the upper fixing plate (201), and the limit grooves (203) match the eyebolt (4).

8. The on-line testing device for a pole-mounted circuit breaker according to claim 6, characterized in that A clamping groove (204) is opened at the lower end of the upper fixing plate (201), and the magnet (304) is inserted into the clamping groove (204).

9. The on-line testing device for a pole-mounted circuit breaker according to claim 1, characterized in that The mounting groove (305) is in a horizontally open shape.

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