CN216899229U - Monitoring device for detecting vibration of switch cabinet - Google Patents
Monitoring device for detecting vibration of switch cabinet Download PDFInfo
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- CN216899229U CN216899229U CN202123330231.3U CN202123330231U CN216899229U CN 216899229 U CN216899229 U CN 216899229U CN 202123330231 U CN202123330231 U CN 202123330231U CN 216899229 U CN216899229 U CN 216899229U
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- switch cabinet
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- monitoring device
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Abstract
The utility model discloses a monitoring device for detecting the vibration of a switch cabinet, and provides the following technical scheme aiming at the problem that a vibration sensor is easily interfered by electrons. The insulating film has the function of insulating electronics, makes vibration sensor avoid receiving the electric current influence of cubical switchboard, improves and detects the precision, and the insulating film does not have the elasticity, makes vibration sensor sense the vibration of the electromagnetic wave of radiation to the cubical switchboard effectively, improves the detection precision of trouble. The vibration sensor transmits the collected vibration signal to the controller, and the controller analyzes the vibration signal.
Description
Technical Field
The utility model relates to the technical field of electrical equipment maintenance, in particular to a monitoring device for detecting vibration of a switch cabinet.
Background
The low-voltage switch cabinet is used as an important power supply device and a control command executing mechanism, and the reliable operation of the low-voltage switch cabinet is related to the realization of the system function of the device. The maintenance work of the equipment is best to treat the disease before the disease is not developed, the maintenance work is well done, and the hidden trouble of the fault is eliminated in advance. Or when the disease is cured at the beginning of the disease, the state detection of the equipment is well done, the fault symptom is found in advance, and the accident seedling is restrained from being initially germinated. When a fault occurs, the fault reason can be quickly and accurately judged, effective measures are taken to control the fault result, and the function of the equipment is recovered. The method increases the investment on equipment fault diagnosis and operation monitoring systems, and is an important means for ensuring the normal operation of low-voltage distribution equipment. The prior art mainly adopts an ultrasonic principle to detect defect faults, and the defect of the technology is that only the defect of the fault above 20khz can be detected, but the defect of the fault below 20khz cannot be detected. Currently, there is a detection method of alternating electromagnetic generated vibration in the market, which detects the vibration frequency of the surface of the switch cabinet to detect the fault, and the vibration signal is collected by a sensor, but the sensor is easily interfered by the current of the switch cabinet on the switch cabinet, thereby reducing the fault detection accuracy, and therefore, there is room for improvement.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a monitoring device for detecting the vibration of a switch cabinet, which has the advantage that a sensor is not influenced by the surface current of the switch cabinet.
In order to achieve the purpose, the utility model provides the following technical scheme:
the utility model provides a monitoring devices for detecting cubical switchboard vibration, include the cubical switchboard with fixed set up in the vibration sensor of cubical switchboard, one side that is close to the cubical switchboard of vibration sensor is equipped with multilayer insulating film, insulating film does not have elasticity, the vibration sensor electricity is connected with the controller.
By adopting the technical scheme, the insulating film has the function of insulating electrons, so that the vibration sensor is prevented from being influenced by the current of the switch cabinet, the detection precision is improved, the insulating film does not have elasticity, the vibration sensor effectively senses the vibration of the electromagnetic waves radiated onto the switch cabinet, and the detection precision of faults is improved. The vibration sensor transmits the collected vibration signal to the controller, and the controller analyzes the vibration signal.
Further, the insulating film is made of polyimide.
By adopting the technical scheme, the polyimide has good insulating property, so that the insulating film has insulating property. And the polyimide film has no elasticity. The induced vibration of the vibration sensor is not affected because the insulating layer has elasticity.
Further, a space between the insulating film and the switch cabinet is filled with a sealant made of an insulating material.
By adopting the technical scheme, the sealant fills the gap between the insulating film and the side wall of the switch cabinet, so that the vibration on the switch cabinet is fully transmitted to the insulating film connected with the vibration sensor, the vibration sensor fully senses the vibration signal on the switch cabinet, and the vibration collection precision is improved.
Further, the sealant continuously covers the space between the insulating film and the switch cabinet.
By adopting the technical scheme, the sealant is continuously coated, so that the space between the insulating film and the switch cabinet is ensured to be filled, and the fault detection precision is improved.
Further, the sealant fills a space between the insulating film and the vibration sensor.
By adopting the technical scheme, the sealant fills the gap between the insulating film and the vibration sensor, so that the vibration on the switch cabinet is fully transmitted to the insulating film and finally transmitted to the vibration sensor, the vibration sensor fully senses the vibration signal on the switch cabinet, and the vibration collection precision is improved.
Further, the sealant continuously covers a space between the insulating film and the vibration sensor.
By adopting the technical scheme, the sealant is continuously coated, so that the space between the insulating film and the vibration sensor is ensured to be filled, and the fault detection precision is improved.
Further, the sealant is composed of a curable resin composition.
By adopting the technical scheme, the curable resin becomes solid under certain conditions, so that the curable resin can extend into the gap and then becomes solid, the gap is filled as much as possible, and the sealant which becomes solid has no elasticity and cannot influence the detection of the vibration sensor.
Further, the vibration sensor is electrically connected with an antenna, and the antenna is electrically connected with the controller.
By adopting the technical scheme, the antenna enhances the signal transmitting capability, so that the collected vibration signals are transmitted to the controller in real time, and the real-time monitoring capability is enhanced.
Further, the vibration sensor is a vibration acceleration sensor, and the vibration frequency detection range of the vibration acceleration sensor is 0kHz-20 kHz.
By adopting the technical scheme, the vibration acceleration sensor utilizes the principle that vibration has acceleration, namely an acceleration signal is a vibration signal, the vibration signal is analyzed by analyzing the acceleration signal, and the vibration acceleration sensor is sensitive in acceleration detection. The vibration frequency of more than 20kHz can be detected by an ultrasonic principle, the vibration frequency in a large range does not need to be detected, and the vibration frequency within the range of 0kHz-20kHz only needs to be detected because the larger the detection range is, the lower the accuracy of the analysis frequency is, so that the higher detection accuracy is ensured.
In conclusion, the utility model has the following beneficial effects:
1. the ultrasonic wave can only detect the faults above 20kHz, and any fault is changed from small to big, even if the equipment fault of dozens of seconds causes explosion accidents, and the fault which generates the vibration above 20kHz can generate frequency division quantity and frequency multiplication quantity when the frequency division quantity and the frequency multiplication quantity are between 0 and 20kHz, so the detection device can detect the defect fault frequency wave band between 0kHz and 20kHz which cannot be detected by the ultrasonic wave, and reduce the occurrence of accidents;
2. according to the Maxwell electromagnetic field theory, partial discharge generates a changing electric field, the changing electric field excites a magnetic field, and thus alternating electric and magnetic fields are mutually excited and spread outwards to form electromagnetic waves. The discharge pulse in a very short time can generate electromagnetic waves with higher frequency and radiate outwards. The electromagnetic wave is transmitted to the surface of the switch cabinet by taking air and a solid medium as transmission media, the surface of the switch cabinet generates vibration due to Faraday cage effect, the vibration sensor attached to the surface of the switch cabinet monitors the vibration frequency of the electromagnetic wave, the frequency range is used as a fault diagnosis basis to evaluate the fault of the switch cabinet, the low-frequency vibration in the range of 0kHz-20kHz can be detected, the defect of the ultrasonic detection range is overcome, the switch cabinet is prevented from being affected at the low frequency, and the safety performance of the switch cabinet is improved.
Drawings
Fig. 1 is a schematic structural view of the interior of the switchgear of the present embodiment;
fig. 2 is a sectional view of the vibration sensor of the present embodiment;
fig. 3 is a partially enlarged view of a portion a of fig. 2.
In the figure: 1. a switch cabinet; 2. a vibration sensor; 3. an insulating film; 4. a sealant; 5. an antenna.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
A monitoring device for detecting the vibration of a switch cabinet, which is shown in figures 1 and 2, comprises a cuboid switch cabinet 1 and a vibration sensor 2 connected in the switch cabinet 1 through a bolt, wherein the bolt is made of polytetrafluoroethylene, and the polytetrafluoroethylene has insulating property. The vibration sensor 2 is a vibration acceleration sensor. The vibration acceleration sensor is a vibration acceleration sensor with the model number of KS76C produced by Yinai Keke technical Limited liability company, and the detection range of the vibration acceleration sensor is 0kHz-33 kHz. The vibration acceleration sensor is electrically connected with the controller.
Referring to fig. 2 and 3, the casing of the vibration acceleration sensor is fixedly arranged on the inner wall of the switch cabinet 1, and the outer side of the casing of the vibration acceleration sensor is wrapped with two layers of insulating films 3, so that the interference of the current inside the switch cabinet 1 on the work of the vibration sensor 2 is avoided. The insulating film 3 wraps the shell of the vibration sensor 2 completely, so that the electromagnetic waves are prevented from vibrating the surface of the shell of the vibration sensor 2, and the detection precision of the vibration sensor 2 is influenced. The material of the insulating film 3 is polyimide.
Referring to fig. 3, the space between the insulating film 3 and the switchgear 1 is filled with a sealant 4. The sealant 4 continuously covers the space between the insulating film 3 and the switchgear 1.
Referring to fig. 3, the sealant 4 is also continuously coated in the space between the insulating film 3 and the vibration sensor 2. The space between the two insulating films 3 is also continuously covered with the sealant 4, improving the insulating effect. The sealing agent 4 is made of a curable resin composition.
Referring to fig. 3, an antenna 5 is fixedly arranged on one side of the vibration sensor 2 away from the switch cabinet 1, the antenna 5 is electrically connected with the vibration sensor 2, and the antenna 5 is in wireless communication with the controller.
Referring to fig. 3, the working steps are as follows: the vibration sensor 2 attached to the surface of the switch cabinet 1 monitors the vibration of the surface of the switch cabinet 1, transmits a vibration signal to the controller through the antenna 5, and the controller performs frequency analysis on the vibration signal and makes fault assessment on the switch cabinet 1 by taking a frequency range as a fault diagnosis basis. If the vibration frequency is within the range of 2 kHz-5 kHz, the fault is insulation flashover; if the vibration frequency is within the range of 5 kHz-7 kHz, the fault is creeping discharge; if the vibration frequency is within the range of 7 kHz-10 kHz, the fault is that internal discharge participates in a small amount of air and impurities; if the vibration frequency is within the range of 10 kHz-14 kHz, the fault is corona discharge; if the vibration frequency is within the range of 14 kHz-18 kHz, the fault is a mechanical fault defect; if the vibration frequency is within the range of 18 kHz-20kHz, the fault is the discharge of the suspension point; the discharge position can be judged according to the judgment of the discharge types, so that the maintenance is convenient.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and all technical solutions that belong to the idea of the present invention belong to the scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.
Claims (9)
1. The utility model provides a monitoring devices for detecting cubical switchboard vibration, include cubical switchboard (1) and fixed set up in vibration sensor (2) of cubical switchboard (1), its characterized in that: one side of the vibration sensor (2) close to the switch cabinet (1) is provided with a plurality of layers of insulating films (3), the insulating films (3) have no elasticity, and the vibration sensor (2) is electrically connected with a controller.
2. A monitoring device for detecting switchgear vibrations, according to claim 1, characterized in that: the insulating film (3) is made of polyimide.
3. A monitoring device for detecting switchgear vibrations, according to claim 1, characterized in that: a space between the insulating film (3) and the switch cabinet (1) is filled with a sealant (4) made of an insulating material.
4. A monitoring device for detecting switchgear vibrations according to claim 3, characterized in that: the sealant (4) continuously covers the space between the insulating film (3) and the switch cabinet (1).
5. A monitoring device for detecting switchgear vibrations according to claim 4, characterized in that: the sealant (4) is filled in a space between the insulating film (3) and the vibration sensor (2).
6. A monitoring device for detecting switchgear vibrations, according to claim 5, characterized in that: the sealant (4) continuously covers the space between the insulating film (3) and the vibration sensor (2).
7. A monitoring device for detecting switchgear vibrations as claimed in claim 6, characterized in that: the sealant (4) is composed of a curable resin composition.
8. A monitoring device for detecting switchgear vibrations, according to claim 1, characterized in that: the vibration sensor (2) is provided with an antenna (5), and the antenna (5) is electrically connected with the controller.
9. A monitoring device for detecting switchgear vibrations as claimed in claim 8, characterized in that: the vibration sensor (2) adopts a vibration acceleration sensor, and the vibration frequency detection range of the vibration acceleration sensor is 0kHz-20 kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123330231.3U CN216899229U (en) | 2021-12-28 | 2021-12-28 | Monitoring device for detecting vibration of switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123330231.3U CN216899229U (en) | 2021-12-28 | 2021-12-28 | Monitoring device for detecting vibration of switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216899229U true CN216899229U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123330231.3U Active CN216899229U (en) | 2021-12-28 | 2021-12-28 | Monitoring device for detecting vibration of switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216899229U (en) |
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2021
- 2021-12-28 CN CN202123330231.3U patent/CN216899229U/en active Active
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