CN110031730B - Insulation testing equipment and method for 6/10kV switch cabinet with five-prevention function - Google Patents
Insulation testing equipment and method for 6/10kV switch cabinet with five-prevention function Download PDFInfo
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- CN110031730B CN110031730B CN201910235469.6A CN201910235469A CN110031730B CN 110031730 B CN110031730 B CN 110031730B CN 201910235469 A CN201910235469 A CN 201910235469A CN 110031730 B CN110031730 B CN 110031730B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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Abstract
The invention discloses equipment and a method for measuring insulation of an 6/10kV switch cabinet with a five-prevention function, wherein the equipment comprises a transmission chassis truck, a conductive contact frame and an electromagnetic mechanical locking mechanism. The transmission chassis vehicle comprises a chassis trolley and a bearing plate, the conductive contact frame comprises an insulating support, a core penetrating insulating cylinder, a conductive copper pipe, a plum blossom contact finger and a conductive copper plate, the electromagnetic mechanical locking mechanism comprises an electromagnetic relay and a mechanical locking mechanism, when the electromagnetic relay is electrified, an electromagnetic coil is attracted, the mechanical locking mechanism opens the locking between the chassis trolley and the bearing plate, the chassis trolley enters a switch chamber of the switch cabinet after being separated from the locking of the bearing plate, the conductive copper pipe and the plum blossom contact finger are electrically connected with the tested insulating load equipment, and the tested insulating equipment is connected with the conductive copper plate in the core penetrating insulating cylinder for testing insulation treatment. Effectively solve on-spot fortune dimension personnel and survey insulating difficulty, the higher characteristics of safe risk.
Description
Technical Field
The invention relates to insulation testing equipment and method for an 6/10kV switch cabinet with a five-prevention function.
Background
Nowadays, with social development, various industrial enterprises adopt 6/10kV switch cabinets to supply power for related equipment for optimizing power supply and distribution modes, and adopt relatively high-voltage power supply modes, so that the defects of difficult manufacturing, easy heating, large installation space, high comprehensive cost and the like of low-voltage and high-current equipment can be effectively avoided, and conditions are provided for load distribution of various users.
At present, after insulating gloves and protective masks are worn by operation and maintenance personnel, a rear cabinet door or a safety baffle of the switch cabinet is opened, after safety is checked, measurement is carried out, specifically, after the rear cabinet door of the switch cabinet is opened or the safety baffle of the switch cabinet is opened, an electroscope with a proper and qualified voltage grade is selected for use to check that no voltage exists in the switch cabinet, and then a megger with a proper and qualified voltage grade is selected for connection with load electrical equipment for measurement, and megger data is read. The insulation testing processing mode not only increases the maintenance workload of operation and maintenance personnel of enterprises, but also is very easy to cause electric shock events, and after the measurement is finished, the recovery work is still needed, so that the problem of whether the measured equipment is finally insulated after the equipment is completely recovered can not be fundamentally solved.
Disclosure of Invention
The invention aims to provide insulation testing equipment and method for an 6/10kV switch cabinet with a five-prevention function, which can solve the danger caused by close contact of operation and maintenance personnel with high-voltage equipment.
The invention discloses equipment for measuring insulation of an 6/10kV switch cabinet with a five-prevention function, which comprises a transmission chassis vehicle, a conductive contact frame and an electromagnetic mechanical locking mechanism, wherein:
the transmission chassis trolley comprises a chassis trolley and a bearing tray for bearing and carrying the chassis trolley, and the chassis trolley can enter the switch cabinet body from the bearing tray;
the conductive contact frame comprises a supporting frame which is fixedly arranged on the upper surface of the chassis trolley and can move along with the chassis trolley, three insulating support columns are fixedly arranged on the inner wall surface of the supporting frame in parallel, three round through holes are arranged above the three insulating support columns in parallel, a core penetrating insulating cylinder is embedded in each round through hole, the other ends of the three insulating support columns are fixedly connected with a conductive copper pipe and a plum blossom contact finger which can be electrically connected with a tested insulating load device, a conductive copper plate is fixedly connected at the joint of each conductive copper pipe and the insulating support column, and the three conductive copper plates are respectively inserted into and extend into the corresponding core penetrating insulating cylinders after being bent at an angle of 90 degrees; an opening guide plate capable of opening a rear cabinet door or a safety baffle of the switch cabinet is fixedly arranged on the side wall of the supporting frame;
electromagnetic type mechanical locking mechanism is including fixed mounting the electromagnetic relay of bottom surface in the carriage to and install the mechanical locking mechanism between chassis dolly and holding tray, after electromagnetic relay circular telegram, the solenoid actuation, mechanical locking mechanism open the chassis dolly with hold the closure between the tray, the chassis dolly breaks away from enter into behind the closure of holding tray in the cubical switchboard switch room, contact with the plum blossom of contact copper pipe and is connected with the insulation load equipment electricity of being surveyed, by surveying insulating equipment with wear the interior conductive copper of core insulating tube to connect, do and survey insulating treatment.
The bearing tray comprises a flat plate for accommodating the chassis trolley, side plates are formed on two sides of the flat plate in a one-time stamping mode, and a folded plate is formed at the front end of the flat plate in a downward one-time stamping mode.
The lower surface of the chassis trolley is fixedly provided with four idler wheels capable of moving in the bearing plate, and the front end surface of the chassis trolley is fixedly provided with two handrails convenient for pushing and pulling the chassis trolley to move.
And a frame of the chassis trolley is internally provided with a locking plate which can be locked with the bearing tray, and the locking plate is controlled and driven by the electromagnetic relay.
The frame of the chassis trolley is internally provided with a locking plate which can be locked with the bearing tray, and the locking plate is controlled and driven by a locking pin penetrating through the folded plate at the front end of the bearing tray.
And two limiting columns for limiting the moving position of the chassis trolley are arranged at one end of the flat plate, which is positioned on the folded plate.
The supporting frame is in a semi-open shape, and the core penetrating insulating cylinder is embedded at the sealing end of the supporting frame.
The insulation testing method of the insulation testing equipment of the 6/10kV switch cabinet with the five-prevention function comprises the following steps of:
1) pushing equipment for insulation measurement of 6/10kV switch cabinets with five-prevention functions to the front of the switch cabinet with the switch pulled out in the previous step by using a switch trolley;
2) pulling out a switch in a switch room of an 6/10kV switch cabinet with a five-prevention function;
3) disconnecting a grounding knife switch in the switch cabinet, electrifying the relay and opening a mechanical locking structure between the chassis trolley and the bearing tray;
4) driving a driving mechanism in the chassis trolley to enable the chassis trolley to enter the switch cabinet along a slide rail on the inner wall of the switch cabinet;
5) in the process of entering the chassis trolley, the opening guide plate on the side wall of the support frame pushes away a rear cabinet door or a safety baffle of the switch cabinet and further enters the switch cabinet, so that the plum blossom contact finger is electrically connected with the tested insulation load equipment;
6) and the insulation measuring equipment is connected with the conductive copper plate extending into the support frame core-penetrating insulation cylinder, data in the insulation measuring equipment is read, insulation measuring processing is completed, and finally the chassis trolley is directly taken out to recover the switch cabinet.
And in the step 3), directly driving a lock pin to open the locking connection between the chassis trolley and the bearing plate. The equipment and the method for testing the insulation of the 6/10kV switch cabinet with the five-prevention function can thoroughly solve the problems, and the insulation resistance of load electrical equipment can be safely measured by using the equipment for testing the insulation on the premise that a grounding switch is separated and a safety baffle on the bus side is not opened.
The equipment for measuring insulation is reliably connected with load electrical equipment through the plum blossom contact finger and conducts electricity, then the equipment is conducted by the conducting copper plate, and the conducting copper plate is led out by the core-through insulation cylinder so as to facilitate the connection of the equipment for measuring insulation, for example: the measuring lines of the megger and the ohmmeter are connected, so that the measuring personnel and the charged part are physically isolated.
According to the equipment for measuring the insulation, the opening guide plate is arranged on the side wall of the supporting frame, the rear cabinet door or the safety baffle of the switch cabinet is opened when the chassis trolley enters the switch cabinet, the rear cabinet door or the safety baffle of the switch cabinet is prevented from being manually opened by operation and maintenance personnel, the operation and maintenance personnel are prevented from approaching load electrical equipment in a short distance, the safety of the operation and maintenance personnel is ensured, the problems that the operation and maintenance personnel are difficult to measure the insulation for a long time and have high safety risk are solved, and the purpose of intrinsic safety is achieved.
Drawings
FIG. 1 is a schematic view showing the structure of the apparatus for measuring insulation according to the present invention.
FIG. 2 is a schematic side view of the apparatus for measuring insulation of the present invention with the retainer tray removed.
FIG. 3 is a side view of the pallet of the present invention.
Detailed Description
Hereinafter, a detailed description will be given of an embodiment of the insulation measuring apparatus according to the present invention with reference to the accompanying drawings.
The following related directions of front, rear, left, right, up, down, etc. are all set by taking the insulation measuring device shown in fig. 1 as the center and the moving direction of the chassis trolley 10 in the bearing tray 11, and the direction in which the chassis trolley 10 enters the switch cabinet is defined as backward movement and the direction in which the chassis trolley moves out of the switch cabinet is defined as forward movement.
As shown in fig. 1 and 2, the insulation testing device with five-prevention function for 6/10kV switch cabinet comprises a transmission chassis vehicle, a conductive contact frame, and an electromagnetic mechanical locking mechanism, wherein:
the transmission chassis vehicle comprises a chassis trolley 10 capable of entering a switch chamber of a five-prevention 6/10kV switch cabinet and a bearing plate 11 for bearing the chassis trolley 10. The chassis trolley 10 adopts a chassis trolley used in an existing 6/10kV switch cabinet with a five-prevention function, and comprises a frame, sliding rails or sliding blocks (not shown in the figure) positioned on two sides of the frame, and a driving device which is arranged in the frame and can drive the chassis trolley 10 to move along the inner wall of the switch cabinet is a screw rod structure, the whole chassis trolley 10 enters the switch cabinet body and can also move out of the switch cabinet body by rotating the screw rod, for example, the switch cabinet chassis trolley disclosed in the Chinese patent CN2017101173321 can be adopted, and other structures can be adopted.
The equipment for measuring the insulation is characterized in that four rollers 15 are fixedly arranged on the lower surface of a chassis trolley 10 used in the existing switch cabinet, so that the chassis trolley 10 can slide into the switch cabinet and can also roll back and forth in a bearing tray 11, and two handrails 12 are fixedly arranged on the surface of the front end of the chassis trolley 10, so that the chassis trolley 10 can be conveniently pushed and pulled to roll back and forth.
The bearing tray 11 comprises a flat plate 18 capable of containing the chassis trolley 10, side plates 16 are formed on two sides of the flat plate 10 in a one-time stamping mode, a through groove for containing the chassis trolley 10 is formed in the middle of the side plates 16 on the two sides, a folded plate 17 is formed on the front end of the flat plate 10 in a one-time stamping mode, four supporting feet 14 are arranged below the flat plate 18, the bearing tray 11 can be placed on a switch trolley in the existing thermal power plant through the supporting feet 14, equipment for measuring insulation in the invention can be moved to the front of a switch cabinet needing insulation measurement through the switch trolley, the switch trolley is a trolley used for conveying various equipment in a switch cabinet machine room of the existing thermal power plant, the switch trolley belongs to equipment commonly used in the thermal power plant, and detailed description of the specific structure and the working principle is omitted.
A locking plate 20 is arranged in the frame of the chassis trolley 10, and the locking plate 20 can be locked with and unlocked from the bearing tray 11. As shown in fig. 3, a lock hole 19 is formed at the front end of the side plate 16 of the support tray 11 near the lock plate 20 of the chassis trolley 10, a handle 9 is arranged after the lock pin 13 connected with the lock plate 20 passes through the strip-shaped through hole 22 formed in the folded plate 17, the end of the lock plate 20 can enter the lock hole 19 to be locked with the support tray 11 by pushing the handle 9, the lock plate 20 can be separated from the lock hole 19 to enable the chassis trolley 10 to be separated from the support tray 11, and then the handrail 12 is pushed to enable the chassis trolley 10 to move back and forth in the support tray 11.
Two limiting columns 8 are fixedly arranged at the front end of the flat plate 18 close to the folded plate 17, are used for limiting the moving position of the chassis trolley 10 in the flat plate 18, and can position the chassis trolley 10.
The locking plate 20 can also be controlled by the electromagnetic relay 7, when the energizing coil of the electromagnetic relay 8 is energized and closed, the locking plate 20 can be driven to move and be separated from the locking with the locking hole 19, when the electromagnetic relay 8 is not energized, the locking plate 20 is in a release state, the end part of the locking plate enters the locking hole 19, and the chassis trolley 10 and the bearing tray 11 are in a locking and fixing state. The mechanical locking mechanism between the chassis trolley 10 and the supporting tray 11 can be a manual structure or an electromagnetic relay controlled structure, which is easy to be realized by those skilled in the art, and can be implemented by various specific structures, as long as the locking and unlocking functions can be realized, and the detailed structure is not described in detail.
The conductive contact frame comprises a semi-open supporting frame 25 fixedly arranged on the upper surface of the chassis trolley 10, one end of the supporting frame 25 close to the handrail 12 of the chassis trolley 10 is in a closed shape and is provided with three round through holes in parallel, a core penetrating insulating cylinder 26 is embedded in each round through hole, three insulating support columns 28 are fixedly arranged on the inner surface of the supporting frame 25 towards the opening direction, the three insulating support columns 28 are respectively positioned below the three round through holes and are vertically parallel to the three core penetrating insulating cylinders 26, one end of a conductive copper pipe 29 is fixedly connected to the other end of each insulating support column 28, the other end of the conductive copper pipe 29 is fixedly connected with a quincunx contact finger 30, the quincunx contact finger 30 can be connected with load electrical equipment, the quincunx contact finger 30 is used as a conductive end connected with the load electrical equipment and conducts electricity, the conductive copper pipe 29 and the quincunx contact finger 30 are the same as electricity-taking equipment in the existing switch cabinet, belongs to the existing mature products sold in the market, and can be reliably connected with load electrical equipment by utilizing the plum blossom contact finger. A conductive copper plate 27 is fixedly connected between each group of conductive copper tubes 29 and the insulation support 28, and the other end of the conductive tube plate 27 is bent at an angle of 90 degrees and then penetrates into the core-through insulation tube 26. The electric conduction device is reliably connected and conducts electricity with load electric equipment through the plum-blossom-shaped contact finger 30, then conducts electricity through the electric conduction copper plate 27, and leads out the electric conduction copper plate 27 through the core-through insulating cylinder 26 so as to facilitate the connection of insulation equipment (such as a megger).
The side wall of the supporting frame 25 is fixedly connected with an opening guide plate 32, so that a rear cabinet plate or a safety baffle of the switch cabinet can be opened in the process that the chassis trolley 10 enters the switch chamber of the switch cabinet, and the reliable connection between the plum blossom-shaped contact finger 30 and the load electrical equipment is facilitated.
In addition, an auxiliary contact (sensor) for monitoring the actual position of the chassis trolley 10 is mounted on the lower surface of the chassis trolley 10, so that the display device can be accurately reflected, and the contact between the copper contact tube 29 and the plum blossom contact finger 30 and the load electrical equipment can be ensured to be reliable.
When the equipment for measuring insulation is used for measuring insulation of load electrical equipment, the method comprises the following steps:
1) pulling out a switch in a switch room of an 6/10kV switch cabinet with a five-prevention function corresponding to the load electrical equipment;
2) pushing the equipment for measuring insulation in the invention to the front of the switch cabinet with the switch pulled out in the previous step by using a switch trolley in the thermal power plant;
3) manually disconnecting a grounding knife switch in the switch cabinet, electrifying the electromagnetic relay 8, and controlling a lock plate 20 in the chassis trolley 10 to unlock and lock the lock plate 20 and the bearing tray 11;
4) driving a driving mechanism in the chassis trolley 10 to enable the chassis trolley 10 to enter the switch cabinet along a slide rail on the inner wall of the switch cabinet;
5) in the process that the chassis trolley 10 enters, the opening guide plate 32 on the side wall of the supporting frame 25 pushes away a rear cabinet door or a safety baffle of the switch cabinet and further enters the switch cabinet, so that the plum blossom contact finger 30 is electrically connected with the tested insulation load equipment;
6) the connecting wire of the insulation equipment megger is directly connected with the conductive copper plate 27 extending into the support frame 25 core-penetrating insulation cylinder 26, the data in the insulation equipment is read, the insulation treatment is finished, finally the chassis trolley is driven to move from the switch cabinet through the driving mechanism in the chassis trolley 10 and enters the bearing tray 11, the chassis trolley 10 is pulled by the handrail 12, the locking plate 20 is locked and fixed with the bearing tray 11 after being abutted against the limit column 8, and the switch cabinet is recovered.
In conclusion, the insulation measuring equipment disclosed by the invention effectively solves the problems of large workload and high safety risk of the conventional insulation measurement by fully utilizing a physical isolation means.
Claims (2)
1. An insulation measuring device of 6/10kV switch cabinet with five-prevention function, which comprises a transmission chassis vehicle, a conductive contact frame and an electromagnetic mechanical locking mechanism, and is characterized in that,
the transmission chassis trolley comprises a chassis trolley and a bearing tray for bearing and carrying the chassis trolley, and the chassis trolley can enter the switch cabinet body from the bearing tray;
the conductive contact frame comprises a supporting frame which is fixedly arranged on the upper surface of the chassis trolley and can move along with the chassis trolley, three insulating support columns are fixedly arranged on the inner wall surface of the supporting frame in parallel, three round through holes are arranged above the three insulating support columns in parallel, a core penetrating insulating cylinder is embedded in each round through hole, the other ends of the three insulating support columns are fixedly connected with a conductive copper pipe and a plum blossom contact finger which can be electrically connected with a tested insulating load device, a conductive copper plate is fixedly connected at the joint of each conductive copper pipe and the insulating support column, and the three conductive copper plates are respectively inserted into and extend into the corresponding core penetrating insulating cylinders after being bent at an angle of 90 degrees; an opening guide plate capable of opening a rear cabinet door or a safety baffle of the switch cabinet is fixedly arranged on the side wall of the supporting frame;
the electromagnetic mechanical locking mechanism comprises an electromagnetic relay fixedly arranged on the inner bottom surface of the supporting frame and a mechanical locking mechanism arranged between a chassis trolley and a bearing tray, when the electromagnetic relay is electrified, an electromagnetic coil is attracted, the mechanical locking mechanism opens the locking between the chassis trolley and the bearing tray, the chassis trolley enters a switch chamber of the switch cabinet after being separated from the locking of the bearing tray, the conductive copper pipe and the quincunx contact finger are electrically connected with tested insulation load equipment, and the tested insulation equipment is connected with a conductive copper plate in the core-penetrating insulation cylinder for testing insulation treatment;
the bearing tray comprises a flat plate for accommodating the chassis trolley, side plates are formed on two sides of the flat plate in a one-time stamping mode, and a folded plate is formed at the front end of the flat plate in a downward stamping mode;
the lower surface of the chassis trolley is fixedly provided with four rollers capable of moving in the bearing plate, and the front end surface of the chassis trolley is fixedly provided with two handrails convenient for pushing and pulling the chassis trolley to move;
a frame of the chassis trolley is internally provided with a locking plate which can be locked with the bearing tray, and the locking plate is controlled and driven by the electromagnetic relay;
two limiting columns for limiting the moving position of the chassis trolley are arranged at one end, located on the folded plate, of the flat plate;
the supporting frame is in a semi-open shape, and the core penetrating insulating cylinder is embedded at the sealing end of the supporting frame.
2. The equipment for testing the insulation of the 6/10kV switch cabinet with the five-prevention function according to claim 1, wherein a lock plate capable of being locked with the bearing tray is arranged in a frame of the chassis trolley, and the lock plate is controlled and driven by a lock pin penetrating through the folded plate at the front end of the bearing tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235469.6A CN110031730B (en) | 2019-03-27 | 2019-03-27 | Insulation testing equipment and method for 6/10kV switch cabinet with five-prevention function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910235469.6A CN110031730B (en) | 2019-03-27 | 2019-03-27 | Insulation testing equipment and method for 6/10kV switch cabinet with five-prevention function |
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| CN110031730A CN110031730A (en) | 2019-07-19 |
| CN110031730B true CN110031730B (en) | 2021-11-05 |
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| CN201910235469.6A Active CN110031730B (en) | 2019-03-27 | 2019-03-27 | Insulation testing equipment and method for 6/10kV switch cabinet with five-prevention function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112666425A (en) * | 2020-10-23 | 2021-04-16 | 德清创赢机械科技有限公司 | Detection device is used in electrical equipment cabinet production |
| CN113223794A (en) * | 2021-05-07 | 2021-08-06 | 大连法伏安电器有限公司 | Composite casing arrester production equipment integrated device |
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| CN201594693U (en) * | 2009-12-26 | 2010-09-29 | 王大海 | Locking device of switch cabinet |
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