Plug-in disconnecting switch state on-line monitoring and predicting device and use method

Abstract

The invention relates to the technical field of power grid safety, and discloses a plug-in disconnecting switch state on-line monitoring and predicting device and a use method.The plug-in disconnecting switch state on-line monitoring and predicting device comprises a conductive arm, a contact finger base, a plurality of contact fingers arranged at intervals and a signal receiver, the conductive arm is fixedly arranged on the outer side wall of the contact finger base, and the contact fingers are symmetrically arranged in two groups; a monitoring assembly is arranged between the contact finger and the side part of the contact finger seat, the monitoring assembly comprises a mounting piece, two ends of the mounting piece are respectively provided with a temperature sensor and a pressure sensor, the temperature sensor is in contact fit with the contact finger seat, and the pressure sensor is in contact fit with the contact finger. According to the plug-in disconnecting switch state on-line monitoring and predicting device and the using method thereof, passive power taking of the monitoring device can be achieved through contact finger through-flow in the disconnecting switch, temperature and pressure data of the disconnecting switch can be continuously collected in real time, meanwhile, a corresponding analysis module is arranged to separate abnormal temperature and pressure data, and the safety of the disconnecting switch is improved. Therefore, the abnormal state is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid security, and specifically to an on-line monitoring and prediction device for the state of an insertion-type disconnector and a usage method thereof. Background Art

[0002] When the disconnector is in live operation, the thermal effect of the contact resistance will cause the contact to heat up. If it overheats, it is necessary to de-energize the high-voltage equipment of the power grid for defect elimination. In severe cases, it may even cause power grid accidents, which has an adverse impact on the safe and stable operation of the power grid. Therefore, it is necessary to monitor the disconnector online during live operation and analyze the cause of overheating.

[0003] The patent document with the publication number CN113701932B discloses an on-line remote measurement device and method for the clamping force and temperature of the finger contacts of a disconnector. The internal sensing signal acquisition device of this device is used to collect the clamping force and temperature of the finger contacts of the disconnector in real time, and provide a signal source for the signal sending device. The sensing signal acquisition device is arranged in the conductive pipe of the disconnector and is used to collect the clamping force and temperature of the finger contacts of the disconnector in real time, convert the analog signals representing the clamping force and temperature of the finger contacts of the disconnector into digital signals and store them, and provide a signal source for the signal sending device; the sensing signal acquisition device includes: a pressure sensor and a temperature sensor, and the pressure sensor and the temperature sensor are installed inside the conductive pipe of the disconnector. At the same time, the signal transmitting device and the signal receiving terminal are connected through a wireless network; the transmission frequency of the signal transmitting device is adjustable; the solar power supply device is used to supply power to the wireless signal acquisition and signal transmitting devices; the signal receiving terminal and the PLC programmable logic controller adopt a set device communication protocol, and finally, the PLC programmable logic controller sends the message to the upper computer through the Ethernet interface via the Ethernet switch; the upper computer runs configuration software, and the configuration software can complete the real-time display, storage, query and report output of the measurement data and alarm information through the designed human-machine interface. It solves the problem that the clamping force of the static contact cannot be quantified during the long-term operation of the disconnector, and avoids the overheating of the conductive circuit caused by too small clamping force, forming a power outage accident. By effectively monitoring the pressure and temperature during the operation of the disconnector and transmitting the monitoring signals, the warning work is completed.

[0004] However, the above device has certain defects when in use:

[0005] First of all, this on-line monitoring device only collects the state information of the disconnector, plays the role of abnormal state alarm, does not carry out state analysis, cannot trace the root cause of the abnormality, and cannot improve the efficiency of abnormal state handling;

[0006] Secondly, this on-line monitoring device only gives feedback on abnormal state information and cannot analyze and predict the state information under normal operating conditions. Summary of the Invention

[0007] (1) Technical problems to be solved

[0008] Aiming at the deficiencies of the prior art, the present invention provides an on-line monitoring and prediction device for the state of an insertion-type disconnector and its use method. The device can realize power supply without external power source for the monitoring device by using the current flowing through the finger contacts inside the disconnector, collect the temperature and pressure data of the disconnector in real time and continuously, and set a corresponding analysis module to separate abnormal temperature and pressure data, so as to solve the problem that the existing disconnector monitoring device only has feedback on abnormal state information and cannot analyze and predict the state information under normal operating conditions.

[0009] (2) Technical solutions

[0010] To achieve the above object, the present invention provides the following technical solutions: An on-line monitoring and prediction device for the state of an insertion-type disconnector includes a conductive arm, a finger contact seat, a plurality of finger contacts arranged at intervals, and a signal receiver. The conductive arm is fixedly arranged on the outer side wall of the finger contact seat. The plurality of finger contacts are symmetrically arranged in two groups and sleeved on the side of the finger contact seat. A monitoring component is arranged between the finger contact and the side of the finger contact seat:

[0011] The monitoring component includes a mounting member. A temperature sensor and a pressure sensor are respectively arranged at both ends of the mounting member. The temperature sensor is in contact and cooperation with the finger contact seat, and the pressure sensor is in contact and cooperation with the finger contact. A first spring is sleeved on the upper end of the monitoring component. Setting the pressure sensor and the temperature sensor in the same component can reduce the internal space of the device. By setting the mounting member in a convex shape, stable support for the setting of the first spring can be provided. It also includes:

[0012] A positioning mechanism, which is symmetrically arranged and arranged on both sides of the monitoring component. The positioning mechanism is used to fix the position of the mounting member.

[0013] Preferably, the mounting member includes a sliding rod, a sliding sleeve and a second spring. The sliding rod slidably penetrates through the inside of the sliding sleeve. First mounting grooves and second mounting grooves are respectively opened at the ends of the sliding rod and the sliding sleeve away from each other. The temperature sensor and the pressure sensor are respectively embedded in the first mounting groove and the second mounting groove, which can determine the use positions of the temperature sensor and the pressure sensor. At the same time, because they are directly placed, when the disconnector is overhauled later, the temperature sensor and the pressure sensor can be quickly taken out;

[0014] Limiting components are arranged on both sides of the upper end of the sliding rod. The limiting components are used to limit the position of the temperature sensor. The second spring is arranged in the sliding sleeve. Both ends of the second spring are fixedly connected to the inside of the sliding sleeve and the end of the sliding rod respectively.

[0015] Preferably, the limiting assembly comprises a limiting bolt, the threaded end of the limiting bolt is threadedly arranged on the side of the sliding rod, the threaded end of the limiting bolt is inserted into the first mounting groove, and the end of the limiting bolt close to the temperature sensor is arranged to abut against the outer wall of the temperature sensor;

[0016] Since the limit bolt can move laterally during continuous rotation, the threaded end of the limit bolt squeezes the side of the temperature sensor after entering the first installation groove, and converts the squeezing friction into sliding friction, thereby fixing the setting position of the temperature sensor, preventing the temperature sensor from falling from the isolating switch as much as possible, and ensuring the overall operation stability of the device.

[0017] Preferably, the positioning mechanism comprises a positioning rod, a fixing cylinder and a third spring, the inner wall of the contact finger is provided with a groove, the fixing cylinder is fixedly arranged on the inner wall of the groove, the rod wall of the positioning rod is slidably arranged inside the fixing cylinder, the end of the positioning rod away from the fixing cylinder passes through the groove and extends to the outside, the lower side of the outer wall of the mounting member is provided with two symmetrically arranged positioning grooves, the end of the positioning rod is inserted into the positioning groove, the third spring is sleeved on the outer side of the positioning rod, and the two ends of the third spring are respectively fixedly connected to the positioning rod and the fixing cylinder;

[0018] By plugging the positioning rod and the positioning groove, the mounting piece can be stably connected to the contact finger. The pressure sensor can be positioned while the temperature sensor is fixed to ensure the stability of the entire mounting piece. The fixing tube can provide stably support for the lateral movement of the positioning rod.

[0019] Preferably, the positioning mechanism further comprises a pull plate, the lower end of which is located in the groove and is fixedly sleeved on the outer side of the positioning rod, and one end of the pull plate away from the positioning rod passes through the groove and extends to the outside;

[0020] The pull plate can be used to quickly pull the positioning rod horizontally, so that the positioning rod can be quickly and conveniently plugged into or separated from the positioning groove.

[0021] Preferably, a limiting groove is provided on the inner wall of the contact finger, and the inner sliding sleeve end of the mounting member is arranged in the limiting groove, so that the setting position of the mounting member can be preliminarily limited by the limiting groove.

[0022] Preferably, the signal receiver is electrically connected to the monitoring component, and an abnormal cause analysis module and a state prediction module are fixedly provided on the inner wall of the signal receiver, and the abnormal cause analysis module and the state prediction module are used to analyze and predict the state of the disconnector.

[0023] Preferably, the internal thread of the finger is passed through two symmetrically arranged mounting bolts. The threaded ends of the mounting bolts are inserted into the side of the finger seat. Two limiting protrusions are provided on the inner wall of the finger seat. One end of the finger inserted into the finger seat is in contact and cooperation with the inner wall of the limiting protrusion;

[0024] The arrangement of the mounting bolts can stably connect the finger and the finger seat, enabling the integrated setting of the disconnector and the monitoring component.

[0025] Preferably, both the sliding sleeve and the sliding rod are insulating rubber parts.

[0026] A method for using an on-line monitoring and prediction device for the state of an insertion type disconnector is as follows:

[0027] S1: First, the finger seat is arranged at the using position of the disconnector through the support column, and the mounting part is arranged inside the finger. The position of the mounting part is determined. Then, the finger is sleeved outside the finger seat, and the position of the finger is determined. At this time, the temperature sensor and the pressure sensor can be connected to the signal receiver;

[0028] S2: After the positions of the internal components of the disconnector are determined, the external contact is inserted into the disconnector and contacts multiple fingers. At this time, the fingers are extruded under the push of the contact, and the mounting part and the first spring are extruded. After the mounting part is pushed, the pressure sensor and the temperature sensor can be used to monitor the internal pressure and temperature data of the disconnector and transmit them in real time;

[0029] S3: After the signal is transmitted to the inside of the signal receiver, the abnormal state analysis module inside the signal receiver analyzes the abnormal state, and the state prediction module predicts the subsequent state of the disconnector.

[0030] (III) Beneficial effects

[0031] Compared with the prior art, the present invention provides an on-line monitoring and prediction device and a using method for the state of an insertion type disconnector, having the following beneficial effects:

[0032] 1. For the on-line monitoring and prediction device and the using method for the state of the insertion type disconnector, by arranging a monitoring component including a temperature sensor and a pressure sensor between the finger seat and the finger, the temperature and pressure data inside the disconnector can be obtained in real time and accurately, providing a reliable basis for subsequent state analysis and fault diagnosis, effectively avoiding problems such as contact heating caused by the thermal effect of contact resistance from developing into serious faults, and ensuring the safe and stable operation of the power grid.

[0033] 2. The on-line monitoring and prediction device and usage method for the state of the plug-in disconnector ensure the stability of the installation position of the monitoring component through the set positioning mechanism. The symmetrically arranged positioning rods, fixed cylinders and spring structures enable the installation part to be accurately positioned within the finger contact, and at the same time, the cooperation of the limit groove and the installation part can make the temperature sensor and the pressure sensor stably contact with the finger seat and the finger contact, ensuring the stable progress of the monitoring work.

[0034] 3. The on-line monitoring and prediction device and usage method for the state of the plug-in disconnector break through the limitation of only alarming of traditional monitoring devices through the built-in abnormal cause analysis module and state prediction module in the signal receiver. It can deeply analyze the collected abnormal data, accurately trace the root cause of the abnormality, and at the same time enable the device to not only focus on the current abnormality, but also, based on the real-time monitoring data and the trend of historical data, prospectively predict the subsequent operating state of the disconnector and know the potential risks in advance.

[0035] 4. The on-line monitoring and prediction device and usage method for the state of the plug-in disconnector, through the set finger contact and finger seat, after the finger seat and the finger contact, connect the overall disconnector conductive circuit to supply power to the temperature sensor and the pressure sensor, without the need to additionally connect an external power source, improving the operation effect of the monitoring device.

[0036] 5. The on-line monitoring and prediction device and usage method for the state of the plug-in disconnector, through the set finger contact, finger seat, installation part, limit groove and the first spring, set the whole installation part into a convex shape, which is convenient for the stable positioning of the first spring. At the same time, under the elastic force of the first spring, when the contact head is inserted into the finger seat, the finger contact can be stably engaged with the contact head through the resilience of the spring, ensuring the stability during the operation of the overall switch.

[0037] 6. The on-line monitoring and prediction device and usage method for the state of the plug-in disconnector, through the set finger seat, finger contact, monitoring component, installation bolt and positioning mechanism, can make the internal structure of the disconnector be set separately and independently, which is convenient for the quick disassembly and maintenance of the disconnector, improving the overall versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 FIG. is a schematic structural diagram of an on-line monitoring and prediction device and usage method for the state of a plug-in disconnector proposed by the present invention;

[0039] Figure 2 FIG. is a schematic connection structure diagram of a finger contact and an installation part in the present invention;

[0040] Figure 3 is Figure 2 a magnified structural view of a partial A part in

[0041] Figure 4 Schematic three-dimensional structure diagram of the mounting member of the present invention;

[0042] Figure 5 is Figure 4 internal sectional view of;

[0043] Figure 6 Schematic working principle diagram of the present invention.

[0044] In the figure: 1 conductive arm, 2 finger seat, 3 fingers, 4 signal receiver, 5 limit protrusion, 6 mounting member, 7 temperature sensor, 8 pressure sensor, 9 first spring, 10 slide bar, 11 slide sleeve, 12 limit bolt, 13 positioning rod, 14 fixed cylinder, 15 third spring, 16 groove, 17 positioning groove, 18 pull plate, 19 limit groove, 20 second spring, 21 abnormal cause analysis module, 22 state prediction module, 23 mounting bolt. Specific embodiments

[0045] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0046] Please refer to Figure 1-6 , an on-line monitoring and prediction device for the state of a plug-in disconnector, including a conductive arm 1, a finger seat 2, a plurality of fingers 3 arranged at intervals, and a signal receiver 4. The conductive arm 1 is fixedly arranged on the outer side wall of the finger seat 2. The plurality of fingers 3 are symmetrically arranged in two groups and sleeved on the side of the finger seat 2. The inside of the finger 3 is threadedly penetrated by two symmetrically arranged mounting bolts 23. The threaded ends of the mounting bolts 23 are inserted into the side of the finger seat 2. Through the arrangement of the mounting bolts 23, the finger 3 can be connected to the finger seat 2, so that the entire disconnector can operate;

[0047] There are two limit protrusions 5 on the inner wall of the finger seat 2. One end of the finger 3 inserted into the finger seat 2 is in contact and cooperation with the inner wall of the limit protrusion 5. The limit protrusion 5 can be used to determine the position of one end of the finger 3, and try to avoid the position change of the finger 3 during the operation of the disconnector;

[0048] A monitoring component is provided between the side of the finger 3 and the finger seat 2. The signal receiver 4 is electrically connected to the monitoring component. An abnormal cause analysis module 21 and a state prediction module 22 are fixedly provided on the inner wall of the signal receiver 4. The abnormal cause analysis module 21 and the state prediction module 22 are used to analyze and predict the state of the disconnector. The combination of the abnormal cause analysis module 21 and the state prediction module 22 can not only enable the device to monitor the temperature and other states during the operation of the disconnector, but also analyze and predict the abnormal state according to the monitoring data, so that the operator can subsequently propose an effective and rapid solution for the occurrence of the abnormal state:

[0049] The monitoring component includes a mounting member 6. A limiting groove 19 is formed in the inner wall of the finger 3. The setting of the limiting groove 19 can quickly locate the preliminary installation position of the mounting member 6;

[0050] The end of the inner sliding sleeve 11 of the mounting member 6 is arranged in the limiting groove 19. Temperature sensors 7 and pressure sensors 8 are respectively arranged at both ends of the mounting member 6. The temperature sensor 7 is in contact and cooperation with the finger seat 2, and the pressure sensor 8 is in contact and cooperation with the finger 3. By respectively contacting the temperature sensor 7 and the pressure sensor 8 with the finger 3 and the finger seat 2, the internal conditions during the operation of the disconnector can be accurately monitored to ensure that the monitoring data is qualified;

[0051] A first spring 9 is sleeved on the upper end of the monitoring component. The mounting member 6 includes a sliding rod 10, a sliding sleeve 11 and a second spring 20. Both the sliding sleeve 11 and the sliding rod 10 are insulating rubber parts. The sliding rod 10 slidably penetrates through the inside of the sliding sleeve 11. First installation grooves and second installation grooves are respectively formed at the ends of the sliding rod 10 and the sliding sleeve 11 away from each other. The temperature sensor 7 and the pressure sensor 8 are respectively embedded in the first installation groove and the second installation groove. Limiting components are arranged on both sides of the upper end of the sliding rod 10. The limiting components are used to limit the position of the temperature sensor 7. The second spring 20 is arranged in the sliding sleeve 11. Both ends of the second spring 20 are fixedly connected to the inside of the sliding sleeve 11 and the end of the sliding rod 10 respectively. The limiting component includes a limiting bolt 12. The threaded end of the limiting bolt 12 is threadedly penetrated through the side of the sliding rod 10. The threaded end of the limiting bolt 12 is inserted into the first installation groove. One end of the limiting bolt 12 close to the temperature sensor 7 abuts against the outer wall of the temperature sensor 7;

[0052] After the position of the mounting member 6 is determined, through the setting of the two limiting bolts 12, the threaded end of the limiting bolt 12 can squeeze the side of the temperature sensor 7 after entering the first installation groove, and convert the extrusion friction into sliding friction, so as to fix the setting position of the temperature sensor 7, and try to prevent the temperature sensor 7 from falling off the disconnector to ensure the overall operation stability of the device.

[0053] It further includes a positioning mechanism which is symmetrically arranged and disposed on both sides of the monitoring component. The positioning mechanism is used to fix the position of the mounting member 6. The positioning mechanism includes a positioning rod 13, a fixing cylinder 14 and a third spring 15. A groove 16 is formed in the inner wall of the finger 3. The fixing cylinder 14 is fixedly disposed on the inner wall of the groove 16. The rod wall of the positioning rod 13 slidably passes through the inside of the fixing cylinder 14. One end of the positioning rod 13 away from the fixing cylinder 14 passes out of the groove 16 and extends to the outside. Two symmetrically arranged positioning grooves 17 are formed in the lower side of the outer wall of the mounting member 6. The end of the positioning rod 13 is inserted into the positioning groove 17. The third spring 15 is sleeved on the outside of the positioning rod 13. Both ends of the third spring 15 are fixedly connected to the positioning rod 13 and the fixing cylinder 14 respectively;

[0054] The positioning mechanism further includes a pulling plate 18. The lower end of the pulling plate 18 is located in the groove 16 and is fixedly sleeved on the outside of the positioning rod 13. One end of the pulling plate 18 away from the positioning rod 13 passes out of the groove 16 and extends to the outside, which is convenient for the pulling plate 18 to be stably pulled;

[0055] Through the cooperation of the pulling plate 18 and the positioning rod 13, before the mounting member 6 is installed, the positioning rod 13 can be horizontally moved along the inside of the fixing cylinder 14 by pulling the pulling plate 18. Thus, after the mounting member 6 is arranged inside the finger 3, the positioning rod 13 can be inserted into the positioning groove 17 on the outside of the mounting member 6 due to the elastic recovery of the second spring 15, stably connecting the mounting member 6 and the finger 3. At the same time, the installation position of the pressure sensor 8 can be determined to ensure that the pressure sensor 8 can perform stable monitoring work.

[0056] A method for using an online monitoring and prediction device for the state of an insertion type disconnector is as follows:

[0057] S1: First, the finger seat 2 is set at the disconnector use position through the support column 1, the mounting member 6 is set inside the finger 3, and the position of the mounting member 6 is determined. Then the finger 3 is sleeved on the outside of the finger seat 2, and the position of the finger 3 is determined. At this time, the temperature sensor 7 and the pressure sensor 8 can be connected to the signal receiver 4;

[0058] S2: After the positions of the internal components of the disconnector are determined, the external contact is inserted into the disconnector and contacts multiple fingers 3. At this time, the fingers 3 are extruded under the push of the contact, and the mounting member 6 and the first spring 9 are extruded. After the mounting member 6 is pushed, the pressure sensor 8 and the temperature sensor 7 can be used to monitor and transmit the internal pressure and temperature data of the disconnector in real time;

[0059] S3: After the signal is transmitted to the inside of the signal receiver 4, the abnormal state analysis module 21 inside the signal receiver 4 analyzes the abnormal state, and the state prediction module 22 predicts the subsequent state of the disconnector.

[0060] In summary, for the online monitoring and prediction device for the state of the plug-in disconnect switch and its usage method, before operation, the temperature sensor 7 and the pressure sensor 8 are respectively arranged in the first installation groove and the second installation groove and are quickly fitted with the installation part 6. Subsequently, one end of the installation part 6 is inserted into the limit groove 19 to determine the position of the pressure sensor 8. Then, the first spring 9 is sleeved on the outer side of the sliding rod 10 of the installation part 6 and contacts the inner wall of the finger 3. At this time, the outer wall of the temperature sensor 7 can contact the inner wall of the finger seat 2, and then the position of the installation part 6 can be positioned. Through the setting of the second spring 20, it can ensure the stable monitoring positions of the pressure sensor 8 and the temperature sensor 7 after the finger 3 is squeezed, and at the same time, it can make all components return to their original positions after the pressure outside the finger 3 disappears, ensuring the stable operation of the overall device and the monitoring work;

[0061] Before positioning the installation part 6, first horizontally pull the two pull plates 18 to make the two pull plates 18 move away from each other. Since the pull plates 18 are fixedly connected to the positioning rods 13, the positioning rods 13 can move along with the pull plates 18 and be squeezed into the fixed cylinder 14. At this time, the second spring 15 is squeezed. After the installation part 6 is inserted into the limit groove 19, release the two pull plates 18, so that the two pull plates 18 drive the positioning rods 13 to rebound and insert into the positioning grooves 17 outside the installation part 6, thereby completing the connection between the finger 3 and the installation part 6;

[0062] Then, a plurality of fingers 3 are arranged in sequence and sleeved on the side of the finger seat 2, and the limit protrusions 5 limit the set positions of the fingers 3. Then, the installation bolts 23 are inserted from the fingers 3 into the finger seat 3, thereby completing the connection between the fingers 3 and the finger seat 2;

[0063] After the overall assembly of the finger seat 2 is completed, the finger seat 2 and the support column 1 form the entire disconnect switch. Thus, after the external contact is inserted into the disconnect switch, the contact squeezes a plurality of fingers 3, causing the fingers 3 to compress the installation part 6. At this time, the third spring 20 inside the installation part 6 is squeezed and simultaneously squeezes the second spring 15. Due to the elastic force of the second spring 15, the fingers 3 are stably engaged and contacted with the contact. At the same time, after the contact contacts the fingers 3, the entire disconnect switch forms a conductive circuit and is connected, enabling the current to enter the temperature sensor 7 and the pressure sensor 8, so that the temperature sensor 7 and the pressure sensor 8 can be activated and detect the extrusion force and the temperature inside the disconnect switch.

[0064] When the internal state of the disconnector is detected by the temperature sensor 7 and the pressure sensor 8, the monitoring signal is transmitted to the signal receiver 4. The abnormal state monitoring module 21 and the state prediction module 22 inside the signal receiver 4 analyze the cause of the abnormality based on the signal and predict possible subsequent problems, enabling the operator to make early deployments to cope with the abnormality and ensuring the stable operation of the disconnector and the overall power grid.

[0065] It should be noted that the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0066] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online monitoring and prediction device for the state of a plug-in disconnector, comprising a conductive arm (1), a contact finger seat (2), a plurality of contact fingers (3) arranged at intervals, and a signal receiver (4), characterized in that: The conductive arm (1) is fixedly mounted on the outer wall of the contact finger seat (2); the plurality of contact fingers (3) are symmetrically arranged in two groups and sleeved on the side of the contact finger seat (2); a monitoring component is arranged between the contact fingers (3) and the side of the contact finger seat (2): The monitoring component comprises a mounting member (6), two ends of the mounting member (6) are respectively provided with a temperature sensor (7) and a pressure sensor (8), the temperature sensor (7) is in contact with the contact finger seat (2), the pressure sensor (8) is in contact with the contact finger (3), the upper end of the monitoring component is sleeved with a first spring (9), and further comprises: A positioning mechanism is symmetrically arranged and disposed on both sides of the monitoring component, and is used to fix the position of the mounting member (6).

2. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 1 is characterized in that: The mounting member (6) comprises a slide bar (10), a slide sleeve (11) and a second spring (20); the slide bar (10) is slidably inserted into the interior of the slide sleeve (11); a first mounting groove and a second mounting groove are respectively provided at the ends of the slide bar (10) and the slide sleeve (11) which are away from each other; the temperature sensor (7) and the pressure sensor (8) are respectively embedded in the first mounting groove and the second mounting groove; both sides of the upper end of the slide bar (10) are provided with limit assemblies, and the limit assemblies are used to limit the position of the temperature sensor (7); the second spring (20) is arranged in the slide sleeve (11); and the two ends of the second spring (20) are respectively fixedly connected to the interior of the slide sleeve (11) and the end of the slide bar (10).

3. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 2 is characterized in that: The limiting assembly comprises a limiting bolt (12), the threaded end of the limiting bolt (12) is threadedly inserted into the side of the sliding rod (10), the threaded end of the limiting bolt (12) is inserted into the first mounting groove, and the end of the limiting bolt (12) close to the temperature sensor (7) is arranged to abut against the outer wall of the temperature sensor (7).

4. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 1 is characterized in that: The positioning mechanism comprises a positioning rod (13), a fixing tube (14) and a third spring (15); the inner wall of the contact finger (3) is provided with a groove (16); the fixing tube (14) is fixedly arranged on the inner wall of the groove (16); the rod wall of the positioning rod (13) is slidably arranged inside the fixing tube (14); one end of the positioning rod (13) away from the fixing tube (14) passes through the groove (16) and extends to the outside; the lower side of the outer wall of the mounting member (6) is provided with two symmetrically arranged positioning grooves (17); the end of the positioning rod (13) is inserted into the positioning groove (17); the third spring (15) is sleeved on the outer side of the positioning rod (13); and the two ends of the third spring (15) are respectively fixedly connected to the positioning rod (13) and the fixing tube (14).

5. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 4 is characterized in that: The positioning mechanism also includes a pull plate (18), the lower end of which is located in the groove (16) and is fixedly sleeved on the outer side of the positioning rod (13); one end of the pull plate (18) away from the positioning rod (13) passes through the groove (16) and extends to the outside.

6. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 1 is characterized in that: The inner wall of the contact finger (3) is provided with a limiting groove (19), and the end of the inner sliding sleeve (11) of the mounting member (6) is arranged in the limiting groove (19).

7. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 1 is characterized in that: The signal receiver (4) is electrically connected to the monitoring component, and an abnormal cause analysis module (21) and a state prediction module (22) are fixedly provided on the inner wall of the signal receiver (4), wherein the abnormal cause analysis module (21) and the state prediction module (22) are used to analyze and predict the state of the disconnector.

8. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 1 is characterized in that: The internal thread of the contact finger (3) is passed through two symmetrically arranged mounting bolts (23), the threaded ends of the mounting bolts (23) are inserted into the side of the contact finger seat (2), the inner wall of the contact finger seat (2) is provided with two limiting protrusions (5), and one end of the contact finger (3) inserted into the interior of the contact finger seat (2) contacts and cooperates with the inner wall of the limiting protrusion (5).

9. The device for online monitoring and prediction of the state of a plug-in disconnector according to claim 2, characterized in that: The sliding sleeve (11) and the sliding rod (10) are both insulating rubber parts.

10. A method for using a plug-in disconnector status online monitoring and prediction device, characterized in that: It comprises an online monitoring and prediction device for the state of a plug-in disconnector according to any one of claims 1 to 9, and the specific operation method is as follows: S1: First, the contact finger seat (2) is set at the use position of the isolating switch through the support column (1), and the mounting member (6) is set inside the contact finger (3), and the position of the mounting member (6) is determined. Then, the contact finger (3) is sleeved on the outside of the contact finger seat (2), and the position of the contact finger (3) is determined. At this time, the temperature sensor (7) and the pressure sensor (8) can be connected to the signal receiver (4); S2: After the position of the internal components of the isolating switch is determined, the external contact is inserted into the isolating switch and contacts the plurality of contact fingers (3). At this time, the contact fingers (3) are squeezed by the push of the contact and squeeze the mounting member (6) and the first spring (9). At this time, after the mounting member (6) is pushed, the pressure sensor (8) and the temperature sensor (7) can be used to monitor the internal pressure and temperature data of the isolating switch and transmit them in real time; S3: After the signal is transmitted to the inside of the signal receiver (4), the abnormal state is analyzed by the abnormal state analysis module (21) inside the signal receiver (4), and the state of the subsequent disconnector is predicted by the state prediction module (22).

Images