CN115420981B - Alternating current power grid relay protection sensitivity determination method and device - Google Patents
Alternating current power grid relay protection sensitivity determination method and device Download PDFInfo
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- CN115420981B CN115420981B CN202211072986.4A CN202211072986A CN115420981B CN 115420981 B CN115420981 B CN 115420981B CN 202211072986 A CN202211072986 A CN 202211072986A CN 115420981 B CN115420981 B CN 115420981B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The application discloses an alternating current power grid relay protection sensitivity determining device which comprises a base and a shield positioned on the outer side of the base, wherein an installation box and a control box positioned opposite to the installation box are arranged on the top of the base; a rheostat which is arranged between the mounting box and the control box and can flexibly configure the resistance value. According to the application, the positions of the supporting components are adjusted through the matching of the guide rails and the supporting components, the varistor with flexibly configured resistance values is supported by the supporting components, the varistor is fixed through the binding bands, the wires wound on the winding frame are discharged through the matching of the driving components and the winding frame, the varistor, the relay protection device and the detector are electrically connected through the wires, the number of turns of the resistor wire connected into the circuit is changed through the matching of the control components and the adjusting screw rod, so that the voltage can be changed, the response of the relay protection device under multiple groups of different voltages is detected, the detection of the sensitivity of the relay protection device is realized, and the device is simple to operate, flexible to use and wide in applicability.
Description
Technical Field
The application relates to the field of electric power, in particular to a method and a device for determining relay protection sensitivity of an alternating current power grid.
Background
At present, a common relay protection device is provided with electrical devices such as a relay, and the like, and the relay protection function is to rapidly judge faults and isolate fault points, so that the key points for realizing the relay protection are to rapidly find fault characteristics and judge the fault characteristics in practice, and then the protection principle is realized by utilizing the normal operation conditions and the changes of the fault conditions, such as current, voltage, impedance, zero sequence, negative sequence, power direction and the like.
Therefore, the sensitivity of the relay protection device needs to be maintained in a reasonable range to ensure the normal use of the ac power grid, so that the detection of the triggering sensitivity of the relay protection device is an important indicator of whether the relay protection device can perform normal functions.
Disclosure of Invention
The application aims to provide a method and a device for determining relay protection sensitivity of an alternating current power grid, wherein the positions of support assemblies are adjusted through the matching of guide rails and the support assemblies, a rheostat capable of flexibly configuring resistance values is supported by the support assemblies, the rheostat is fixed through a binding belt, wires wound on the winding frame are discharged through the matching of a driving assembly and the winding frame, the rheostat, a relay protection device and a detector are electrically connected through the wires, the number of turns of a resistance wire connected into a circuit is changed through the matching of a control assembly and an adjusting lead screw, and then voltage can be changed, the response of the relay protection device under a plurality of groups of different voltages is detected, and the detection of the sensitivity of the relay protection device is realized, so that the defects are overcome.
In order to achieve the above object, the present application provides the following technical solutions: the utility model provides an alternating current power grid relay protection sensitivity determining device, includes the base and is located the guard shield in the base outside, install mounting box and the control box that is located the opposite of mounting box at the top of base, the front panel of control box is embedded to be equipped with the touch screen, divide into mounting chamber and storage chamber through the baffle in the control box, install the detector with touch screen electric connection in the mounting chamber, the sliding of storage chamber is provided with the storage frame;
the varistor is arranged between the mounting box and the control box and can flexibly configure resistance, and comprises an insulating porcelain cylinder and resistance wires wound on the outer wall of the insulating porcelain cylinder, wherein threaded sleeves are arranged at two ends in the insulating porcelain cylinder, and clamping seats and clamping heads are respectively arranged in the two threaded sleeves;
the adjustable supporting part is arranged at the bottom of the rheostat and comprises a guide rail, a supporting component and a binding belt, wherein the supporting component is arranged on the guide rail in a sliding mode, the binding belt is used for fixing the rheostat, the guide rail is fixed at the top of the base, and the supporting component is used for supporting the rheostat;
the adjusting part is used for changing the resistance of the rheostat, and comprises a control assembly, an adjusting screw rod, a metal rod and a sliding assembly which is arranged on the outer wall of the metal rod in a sliding manner, wherein upper binding posts are arranged at two ends of the metal rod, and the two upper binding posts are respectively fixed on the outer walls of the mounting box and the control box;
the wire winding part is arranged at one side of the adjusting part and is used for arranging wires, the wire winding part comprises a fixing frame and a moving plate arranged at the top of the fixing frame, the fixing frame is fixed at the top of the base, a plurality of wire winding frames distributed in a linear array are rotatably arranged at the inner side of the fixing frame, and a plurality of driving assemblies distributed in a linear array and used for driving the wire winding frames are arranged at the inner side of the moving plate;
the relay protection device is arranged on one side of the winding part, and the clamping part is used for fixing the relay protection device.
As a preferable scheme of the application, both ends of the outer wall of the insulating porcelain cylinder are sleeved with metal hoops for fixing resistance wires, the metal hoops are provided with lower binding posts, and the outer wall of the resistance wires is coated with insulating paint;
the clamping seat comprises a clamping sleeve in threaded connection with the threaded sleeve and a clamping cylinder fixed in the clamping sleeve, six L-shaped buckling grooves distributed in an annular array are formed in the outer wall of the clamping cylinder, and a permanent magnet is embedded in the clamping cylinder;
the clamping head comprises a clamping cylinder and a threaded part which is arranged on the outer wall of one end of the clamping cylinder and is in threaded connection with a threaded sleeve, a permanent magnet column which is magnetically attracted with a permanent magnet is arranged in the clamping cylinder, and six buckling blocks which are distributed around the permanent magnet column in an annular array mode and are used for adapting to L-shaped buckling grooves are arranged on the inner wall of the clamping cylinder.
As a preferable scheme of the application, a convex-shaped chute is arranged at the central line position of the guide rail, two strip-shaped holes communicated with the convex-shaped chute are arranged at the top of the guide rail, and the two strip-shaped holes are symmetrically arranged;
the support assembly comprises a sliding lug arranged in the convex-shaped sliding groove in a sliding manner and a T-shaped support block fixed at the top of the sliding lug, a V-shaped groove is formed in the top of the T-shaped support block, through holes for binding bands are formed in two sides of the V-shaped groove, a positioning clamping block is fixed at the center of the bottom of the T-shaped support block, and a threaded through hole is formed in the center of the positioning clamping block;
the top of sliding lug has seted up the location draw-in groove that matches with the location fixture block, be provided with in the through-hole of location draw-in groove one side with the bolt that is used for fixed T shape supporting shoe of screw thread through-hole threaded connection, the bilateral symmetry of location draw-in groove is provided with the threaded rod, the threaded rod is located the bar downthehole, threaded connection has the fastening nut that is used for locking sliding lug on the outer wall of threaded rod, fastening nut is located guide rail top.
As a preferred scheme of the application, the control assembly comprises a motor arranged in the mounting box, an output shaft key of the motor is connected with a sector gear, the top of the sector gear is connected with a transmission gear in a meshed manner, one end of the adjusting screw rod is rotationally connected with the control box through a bearing, the other end of the adjusting screw rod penetrates through the mounting box and is fixedly connected with the transmission gear, the other end of the adjusting screw rod is rotationally connected with the mounting box through a bearing, a nut sliding seat horizontally moving along the adjusting screw rod is sleeved on the outer wall of the adjusting screw rod, and one side of the nut sliding seat is provided with a mounting bracket;
the sliding assembly comprises a U-shaped piece arranged on the outer wall of the metal rod in a sliding mode and a splayed sliding sheet fixed inside the U-shaped piece, the top of the U-shaped piece is fixedly connected with the bottom of the mounting bracket, and the splayed sliding sheet is arranged on the outer wall of the resistance wire in a sliding mode.
As a preferable scheme of the application, a group of sliding grooves distributed in a linear array are formed on both sides of the fixed frame, semicircular through holes communicated with the sliding grooves are formed at the bottom of the sliding grooves, two telescopic rods used for connecting a moving plate are symmetrically arranged on the inner side of the fixed frame, two groups of limiting plates distributed in a linear array and used for being in sliding fit with the sliding grooves are arranged at the bottom of the moving plate, and the semicircular through holes are formed at the bottom of the limiting plates;
the winding frame comprises a supporting disc and a central winding rod fixed at the central position of the top of the supporting disc, wherein a plurality of peripheral winding rods which are distributed in a ring array mode around the central winding rod and are used for winding wires are further arranged on the supporting disc, limiting rings are sleeved and fixed at the upper ends of the central winding rod and the peripheral winding rods, and a rotating column which is rotationally connected with a fixing frame through a bearing is arranged at the central position of the bottom of the supporting disc;
the driving assembly comprises a connecting disc and a shaft rod which is arranged on the moving plate in a rotating mode through a bearing, a handle is arranged at the upper end of the shaft rod, the lower end of the shaft rod is fixedly connected with the top of the connecting disc, and a slot which is matched with the central winding rod and the peripheral winding rod is formed in the bottom of the connecting disc.
As a preferable scheme of the application, the clamping part comprises a horizontal adjusting module, L-shaped clamping plates for clamping the relay protection device are arranged on two moving bodies with opposite movement directions of the horizontal adjusting module, and the top of the base is provided with a mounting groove for fixing the horizontal adjusting module.
As a preferable scheme of the application, at least two storage grids are divided into the storage rack through the partition plate, the top of the storage rack is provided with the cross rod, sliding strips are symmetrically arranged on two sides of the storage rack, and sliding channels which are in sliding fit with the sliding strips are respectively arranged on the control box and the partition plate.
As a preferable scheme of the application, two symmetrical locking devices for fixing the shield are arranged on the front side and the rear side of the base, bayonets matched with the locking devices are arranged on the shield, and a handle is arranged on the top of the shield.
Based on the alternating current power grid relay protection sensitivity determining device, the application also provides an alternating current power grid relay protection sensitivity determining method, which comprises the following specific steps of
Step one: determining a resistance range, and selecting a single varistor with a proper resistance value or assembling and connecting two or more varistors in series to form a new varistor;
step two: the varistor is fixed, the position of the supporting component is adjusted through the matching of the guide rail and the supporting component, and after the varistor is supported by the supporting component, the varistor is fixed by using a binding belt;
step three: the relay protection device is fixed, and is clamped and fixed through the cooperation of the horizontal adjusting module and the L-shaped clamping plate;
step four: wiring, namely discharging a wire wound on the winding frame through the cooperation of the driving assembly and the winding frame, connecting the upper wiring terminal and the lower wiring terminal into a circuit by using the wire in a top-to-bottom wiring mode, electrically connecting the rheostat with the relay protection device, and connecting the detector into the circuit by using the wire;
step five: the sensitivity is determined, the number of turns of the resistance wire access circuit is changed through the cooperation of the control assembly and the adjusting screw rod, the resistance value of the rheostat access circuit is changed, the voltage is further changed, and the detector can display the response of the relay protection device under a plurality of groups of different voltages in real time through the touch screen after signal conversion;
step six: and (3) replacing the relay protection device, disconnecting the power supply after the detection is finished, removing the lead of the relay protection device, removing the relay protection device fixed in the third step, replacing the next relay protection device, and performing a new round of detection.
In the technical scheme, the application has the technical effects and advantages that:
1. through the cooperation of guide rail and supporting component, adjust supporting component's position, support the varistor that can carry out nimble configuration to the resistance through supporting component, fix the varistor through the bandage, through the cooperation of drive assembly and bobbin, pay out the wire of winding on the bobbin, utilize the wire to make varistor, relay protection device and detector electric connection, through the cooperation of control assembly and adjusting screw, change the number of turns that the resistance wire inserts the circuit, and then can change the voltage, detect relay protection device's response under the different voltages of multiunit, realize the detection of relay protection device sensitivity, and easy operation, flexible usage, extensive applicability;
2. the motor drives the sector gear, the sector gear and the transmission gear are meshed for transmission, the adjusting screw rod is rotated in a stepping mode, the nut sliding seat is meshed for stepping sliding, the nut sliding seat is utilized for driving the sliding component to slide, the number of turns of the resistance wire connected into the circuit is changed, the purpose of changing the resistance is achieved, and the change amount of the resistance each time is equal due to the fact that the stepping rotation of the adjusting screw rod is achieved, and therefore measurement errors can be reduced;
3. the plurality of varistors can be assembled together through the cooperation of the clamping seat and the clamping head, and then the varistors can be connected in series through the lower binding post connected by the lead, so that the plurality of varistors are connected in series to form the varistor with a larger resistance value, the resistance value of the varistor can be flexibly configured according to the use requirement of a user, the use is more convenient, and compared with the use of the sliding varistor, the arranged assemblable varistor has smaller occupied space and more flexible use;
4. through the cooperation of drive assembly and bobbin, can realize the free receive and release of wire, not only realize the orderly accomodating of wire, protect the wire, and can effectively avoid appearing the condition that the wire is disordered and the wire is lost, and the telescopic link of setting can change the height of movable plate, is favorable to the wire of later stage change damage.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic diagram of the overall structure of the present application;
FIG. 2 is a first perspective view of the present application (with the shield omitted);
FIG. 3 is a second perspective view of the present application (with the shield omitted);
FIG. 4 is a third perspective view of the present application (with the shield omitted);
fig. 5 is a perspective view of a winding part of the present application;
FIG. 6 is a disassembled view of the fixing frame and the winding frame of the present application;
FIG. 7 is a diagram illustrating the installation of a moving plate and a driving assembly according to the present application;
FIG. 8 is a cross-sectional view of a support portion of the present application;
FIG. 9 is an exploded view of the support assembly of the present application;
fig. 10 is a perspective view of a varistor according to the present application;
fig. 11 is an exploded view of the varistor of the present application;
FIG. 12 is a perspective view of a chuck according to the present application;
FIG. 13 is a view showing the connection of the base and the cover according to the present application.
Reference numerals illustrate:
1. a base; 11. a lock; 12. a mounting box; 13. a control box; 131. a touch screen; 132. a partition plate; 133. a storage rack; 1331. a partition plate; 1332. a sliding bar; 1333. a cross bar; 134. a sliding channel; 2. a shield; 21. a bayonet; 3. an adjusting section; 31. adjusting a screw rod; 32. a motor; 33. a sector gear; 34. a transmission gear; 35. a nut sliding seat; 36. a mounting bracket; 37. a metal rod; 38. a sliding assembly; 4. a relay protection device; 5. a winding part; 51. a fixing frame; 511. a sliding groove; 512. a semicircular through hole; 52. a moving plate; 521. a limiting plate; 522. a connecting disc; 523. a handle; 53. a bobbin; 531. a support plate; 532. a central winding rod; 533. a peripheral winding rod; 534. a limiting ring; 54. a telescopic rod; 6. a varistor; 61. an insulating porcelain tube; 62. a resistance wire; 63. a metal hoop; 64. a lower terminal; 65. a chuck; 651. a clamping cylinder; 652. a threaded portion; 653. a permanent magnet column; 654. a buckling block; 66. a clamping seat; 661. a cutting sleeve; 662. a clamping cylinder; 6621. an L-shaped buckling groove; 663. a permanent magnet; 67. a thread sleeve; 7. a horizontal adjustment module; 71. an L-shaped clamping plate; 8. a support part; 81. a guide rail; 811. a convex sliding groove; 812. a bar-shaped hole; 82. a support assembly; 821. a T-shaped supporting block; 8211. positioning a clamping block; 8212. a through hole; 8213. a threaded through hole; 822. a sliding bump; 8221. positioning clamping grooves; 823. a threaded rod; 824. a fastening nut; 83. a binding band.
Detailed Description
In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.
The application provides an alternating current power grid relay protection sensitivity determining device as shown in fig. 1-13, which comprises a base 1 and a shield 2 positioned at the outer side of the base 1, wherein in the structure, the top of the base 1 is provided with a mounting box 12 and a control box 13 positioned at the opposite side of the mounting box 12, a touch screen 131 is embedded on the front panel of the control box 13, the touch screen 131 can display the response of a relay protection device 4 under a plurality of groups of different voltages, the control box 13 is internally divided into a mounting cavity and a containing cavity by a baffle 132, a detector electrically connected with the touch screen 131 is arranged in the mounting cavity, the detector can display the response of the relay protection device 4 under a plurality of groups of different voltages in real time by the touch screen 131 after signal conversion, and a socket (omitted in the drawing) electrically connected with the detector is also arranged on the control box 13, so that the arranged socket is convenient for a user to access the detector, and belongs to the prior art, therefore, the mounting position and the specific structure of the socket are not detailed herein, and the containing cavity is slidably provided with a containing frame 133;
the varistor 6 is arranged between the mounting box 12 and the control box 13, and can flexibly configure resistance, in the structure, the varistor 6 comprises an insulating porcelain tube 61 and a resistance wire 62 wound on the outer wall of the insulating porcelain tube 61, screw sleeves 67 are arranged at two ends in the insulating porcelain tube 61, and a clamping seat 66 and a clamping head 65 are respectively arranged in the two screw sleeves 67;
the adjustable supporting part 8 is arranged at the bottom of the rheostat 6, the supporting part 8 in the structure comprises a guide rail 81, a supporting component 82 arranged on the guide rail 81 in a sliding manner and a binding belt 83 used for fixing the rheostat 6, the guide rail 81 is fixed at the top of the base 1, and the supporting component 82 is used for supporting the rheostat 6;
the adjusting part 3 is arranged on one side of the rheostat 6, the adjusting part 3 is used for changing the resistance of the rheostat 6 in the structure, the adjusting part 3 comprises a control assembly, an adjusting screw rod 31, a metal rod 37 and a sliding assembly 38 which is arranged on the outer wall of the metal rod 37 in a sliding manner, two ends of the metal rod 37 are provided with upper binding posts, and the two upper binding posts are respectively fixed on the outer walls of the mounting box 12 and the control box 13;
the wire winding part 5 is arranged on one side of the adjusting part 3, the wire winding part 5 is used for arranging wires in the structure, the wire winding part 5 comprises a fixing frame 51 and a moving plate 52 arranged on the top of the fixing frame 51, the fixing frame 51 is fixed on the top of the base 1, a plurality of wire winding frames 53 distributed in a linear array are rotatably arranged on the inner side of the fixing frame 51, and a plurality of driving assemblies distributed in a linear array and used for driving the wire winding frames 53 are arranged on the inner side of the moving plate 52;
and the relay protection device 4 is arranged on one side of the winding part 5, and a clamping part for fixing the relay protection device 4.
Specifically, a resistor 6 with a proper resistance value is selected, a resistor 6 with a proper resistance value can be selected, two or more varistors 6 can be assembled into a varistor 6 with a proper resistance value through a clamping seat 66 and a clamping head 65 which are arranged, the position of a supporting component 82 is adjusted, the varistor 6 is supported by the supporting component 82, the varistor 6 is bound by a binding belt 83, a relay protection device 4 is fixed through a clamping part, a wire wound on the winding frame 53 is discharged through the cooperation of the driving component and the winding frame 53, then the upper wiring post and the lower wiring post 64 are connected into a circuit through wires according to a wiring mode of a sliding varistor, the varistor 6 and the relay protection device 4 are electrically connected, then a detector is connected into the circuit through the wires, the number of turns of the connection of the resistance wire 62 into the circuit is changed through the cooperation of the control component and the adjusting screw 31, the resistance value of the connection of the varistor 6 into the circuit is changed, and then the voltage is changed, and the detector can display the response of the relay protection device 4 under a plurality of groups of different voltages in real time through signal conversion by the touch screen 131.
Based on the alternating current power grid relay protection sensitivity determining device, the application also provides an alternating current power grid relay protection sensitivity determining method, which comprises the following specific steps of
Step one: determining the resistance range, selecting a single varistor 6 with a proper resistance value or assembling two or more varistors 6 and connecting the varistors in series to form a new varistor 6;
step two: the varistor 6 is fixed, the position of the supporting component 82 is adjusted through the matching of the guide rail 81 and the supporting component 82, and after the varistor 6 is supported by the supporting component 82, the varistor 6 is fixed by using the binding band 83;
step three: the relay protection device 4 is fixed, and the relay protection device 4 is clamped and fixed through the cooperation of the horizontal adjusting module 7 and the L-shaped clamping plate 71;
step four: wiring, namely, discharging the wires wound on the winding frame 53 through the cooperation of the driving assembly and the winding frame 53, connecting the upper wiring terminal and the lower wiring terminal 64 into a circuit by using the wires in a top-to-bottom wiring mode, electrically connecting the rheostat 6 with the relay protection device 4, and connecting the detector into the circuit by using the wires;
step five: the sensitivity is determined, the number of turns of the resistor wire 62 connected to the circuit is changed through the cooperation of the control component and the adjusting screw rod 31, the resistance value of the rheostat 6 connected to the circuit is changed, the voltage is further changed, and the detector can convert the response of the relay protection device 4 under a plurality of groups of different voltages and display the response in real time through the touch screen 131;
step six: and (3) replacing the relay protection device 4, disconnecting the power supply after the detection is finished, removing the lead of the relay protection device 4, removing the relay protection device 4 fixed in the third step, replacing the next relay protection device 4, and performing a new round of detection.
Referring to fig. 1-4 and fig. 10-12, in order to improve the applicability of the present application and realize flexible configuration of resistance of the varistor 6, in the structure, metal hoops 63 for fixing the resistance wire 62 are sleeved at both ends of the outer wall of the insulating porcelain tube 61, a lower binding post 64 is mounted on the metal hoops 63, and insulating paint is coated on the outer wall of the resistance wire 62;
in the above technical solution, in the structure, the clamping seat 66 includes a clamping sleeve 661 in threaded connection with the threaded sleeve 67 and a clamping cylinder 662 fixed inside the clamping sleeve 661, six L-shaped buckling grooves 6621 distributed in annular array are formed on the outer wall of the clamping cylinder 662, and permanent magnets 663 are embedded in the clamping cylinder 662;
in the above technical scheme, in the structure, the chuck 65 includes a clamping cylinder 651 and a threaded portion 652 disposed on an outer wall of one end of the clamping cylinder 651 and in threaded connection with the threaded sleeve 67, a permanent magnet post 653 magnetically attracted to the permanent magnet 663 is disposed in the clamping cylinder 651, and six fastening blocks 654 distributed around the permanent magnet post 653 in an annular array manner and used for adapting to the L-shaped fastening groove 6621 are disposed on an inner wall of the clamping cylinder 651.
Specifically, when two or more varistors 6 are required to be assembled together, the fastening block 654 on the chuck 65 of one varistor 6 is inserted into the L-shaped fastening groove 6621 on the clamping cylinder 662 of the other varistor 6, and then one varistor 6 is rotated until the fastening block 654 cannot move continuously, the two varistors 6 can be assembled together by matching the fastening block 654 with the L-shaped fastening groove 6621, and meanwhile, the stability of the joint is improved by utilizing the magnetic connection between the permanent magnet posts 653 and the permanent magnet 663.
Referring to fig. 1 to 4 and fig. 8 to 9, in order to support varistors 6 of different lengths and fix varistors 6, a convex-shaped sliding groove 811 is formed in a central line of a guide rail 81 in the structure, two bar-shaped holes 812 communicated with the convex-shaped sliding groove 811 are formed in the top of the guide rail 81, the two bar-shaped holes 812 are symmetrically arranged, and the guide rail 81 can be further provided with scale marks for determining the distance between the two support components 82, so that a user can adjust the distance between the two support components 82 conveniently;
the support assembly 82 in the structure comprises a sliding lug 822 arranged in the convex sliding groove 811 in a sliding manner and a T-shaped support block 821 fixed at the top of the sliding lug 822, a V-shaped groove is formed in the top of the T-shaped support block 821, through holes 8212 for binding the binding bands 83 are formed in two sides of the V-shaped groove, a positioning clamping block 8211 is fixed at the center position of the bottom of the T-shaped support block 821, a threaded through hole 8213 is formed in the center position of the positioning clamping block 8211, and the sliding lug 822 and the T-shaped support block 821 are connected through bolts, so that the support assembly is convenient to detach;
in addition, the top of sliding lug 822 in the structure has offered the location draw-in groove 8221 that matches with fixture block 8211, utilize the cooperation of location draw-in groove 8221 and fixture block 8211 to carry out quick location to T shape supporting shoe 821, be provided with the bolt that is used for fixed T shape supporting shoe 821 with screw thread through-hole 8213 threaded connection in the through-hole of location draw-in groove 8221 one side, the bilateral symmetry of location draw-in groove 8221 is provided with threaded rod 823, threaded rod 823 is located bar hole 812, threaded connection has the fastening nut 824 that is used for locking sliding lug 822 on the outer wall of threaded rod 823, fastening nut 824 is located guide rail 81 top.
Specifically, by screwing the fastening nut 824, the locking and unlocking operations of the sliding lug 822 can be completed, when the distance between the two support assemblies 82 needs to be adjusted, after the sliding lug 822 is unlocked, the support assemblies 82 are manually moved to slide along the convex-shaped sliding groove 811, the distance between the two support assemblies 82 can be adjusted, after the distance between the support assemblies 82 is adjusted, the varistor 6 is placed in the V-shaped groove, and then the varistor 6 is fastened by using the binding band 83, so that the varistor 6 can be fixed, and the operation is very simple.
Referring to fig. 1 to 4, in order to realize automatic adjustment of the resistance value of the rheostat 6, so that the resistance change amounts are equal, a control component in the structure comprises a motor 32 arranged in a mounting box 12, an output shaft key of the motor 32 is connected with a sector gear 33, the top of the sector gear 33 is connected with a transmission gear 34 in a meshed manner, one end of an adjusting screw 31 in the structure is rotatably connected with the control box 13 through a bearing, the other end of the adjusting screw 31 penetrates through the mounting box 12 and is fixedly connected with the transmission gear 34, the other end of the adjusting screw 31 is rotatably connected with the mounting box 12 through a bearing, a nut sliding seat 35 horizontally moving along the adjusting screw 31 is sleeved on the outer wall of the adjusting screw 31, and a mounting bracket 36 is arranged on one side of the nut sliding seat 35;
wherein, the sliding component 38 in the structure comprises a U-shaped piece arranged on the outer wall of the metal rod 37 in a sliding way and a splayed sliding sheet fixed in the U-shaped piece, the top of the U-shaped piece is fixedly connected with the bottom of the mounting bracket 36, and the splayed sliding sheet is arranged on the outer wall of the resistance wire 62 in a sliding way.
Specifically, the motor 32 is started, the sector gear 33 is driven by the motor 32, the adjusting screw 31 is rotated step by step through the meshing transmission of the sector gear 33 and the transmission gear 34, so that the nut sliding seat 35 is in meshing stepping sliding, the nut sliding seat 35 is utilized to drive the sliding component 38 to slide, the number of turns of the resistance wire 62 connected into a circuit is changed, the purpose of changing the resistance is achieved, and the change amount of the resistance each time is equal due to the stepping rotation of the adjusting screw 31, so that the measurement error can be reduced.
It should be noted that, the sector gear 33 and the transmission gear 34 may be adjusted according to actual needs, for example, when the sector gear 33 rotates one turn, the transmission gear 34 drives the adjusting screw 31 to rotate one third turn, one half turn or one quarter turn.
Referring to fig. 1-4 and fig. 5-7, in order to orderly store wires, a group of sliding grooves 511 distributed in a linear array are formed on two sides of a fixing frame 51 in the structure, semicircular through holes 512 communicated with the sliding grooves 511 are formed at the bottom of the sliding grooves 511, two telescopic rods 54 used for connecting a moving plate 52 are symmetrically arranged on the inner side of the fixing frame 51 in the structure, two groups of limiting plates 521 distributed in a linear array and used for being in sliding fit with the sliding grooves 511 are arranged at the bottom of the moving plate 52, semicircular through holes 512 are formed at the bottom of the limiting plates 521, the semicircular through holes 512 on the limiting plates 521 and the sliding grooves 511 jointly form circular through holes capable of allowing wires to pass, the wires are limited through the circular through holes, and the two ends of the used wires are connecting terminals capable of being electrically connected with binding posts such as Du Bangtou or crocodile clips, so that the wires can be limited, the wires are prevented from entering the fixing frame 51, and the wiring difficulty can be reduced;
the winding frame 53 in the structure comprises a supporting disc 531 and a central winding rod 532 fixed at the central position of the top of the supporting disc 531, a plurality of peripheral winding rods 533 which are distributed around the central winding rod 532 in a ring array manner and are used for winding wires are further arranged on the supporting disc 531, limiting rings 534 are sleeved and fixed at the upper ends of the central winding rod 532 and the peripheral winding rods 533, and a rotating column which is rotationally connected with the fixed frame 51 through a bearing is arranged at the central position of the bottom of the supporting disc 531 in the structure;
in addition, the driving component in the structure comprises a connecting disc 522 and a shaft rod which is rotatably arranged on the moving plate 52 through a bearing, a handle 523 is arranged at the upper end of the shaft rod, the lower end of the shaft rod is fixedly connected with the top of the connecting disc 522, and slots which are matched with the central winding rod 532 and the peripheral winding rods 533 are formed in the bottom of the connecting disc 522.
Specifically, the movable plate 52 is driven to move upwards through the telescopic rod 54 to expose the winding frame 53, the middle part of the wire is wound around the central winding rod 532 for one circle, then both ends of the wire are placed in the semicircular through holes 512 on the sliding groove 511, the wire is clamped by the adjacent peripheral winding rods 533, the wire can be fixed by using a binding belt for improving the stability of the wire, the telescopic rod 54 drives the movable plate 52 to return to the original position, the central winding rod 532 and the peripheral winding rods 533 are inserted into the slots on the connecting disc 522, the connecting disc 522 drives the winding frame 53 to rotate by rotating the handle 523, the wire is wound on the winding frame 53 by utilizing the rotating winding frame 53, when the wire is needed, the handle 523 is reversely rotated, the wire can be pulled out by hands, so that the wire is orderly stored, the wire is protected, and the situation that the wire is disordered and the wire is lost can be effectively avoided.
In the above scheme, in order to fix relay protection device 4, prevent to lead to junction disconnection because of operations such as mistake touch, clamping part includes horizontal adjustment module 7 in the structure, all install the L shape splint 71 that is used for centre gripping relay protection device 4 on the mobile body that two direction of motion are opposite of horizontal adjustment module 7, and the mounting groove that is used for fixed horizontal adjustment module 7 is offered at the top of base 1 in the structure, horizontal adjustment module 7 can be two-way straight line module, through starting horizontal adjustment module 7, make the mobile body drive L shape splint 71 and remove, utilize L shape splint 71 to press from both sides tight relay protection device 4, fix relay protection device 4.
In the above scheme, in order to improve the applicability of the present application, at least two storage compartments are separated in the storage rack 133 by the partition plate 1331 in the structure, the top of the storage rack 133 is provided with the cross rod 1333, the provided cross rod 1333 is beneficial to taking and placing the storage rack 133, two sides of the storage rack 133 are symmetrically provided with the sliding strips 1332, the rapid positioning of the storage rack 133 is realized by the matching of the provided sliding strips 1332 and the sliding channels 134 in sliding fit with the sliding strips 1332, in the structure, the control box 13 and the partition plate 132 are provided with the sliding channels 134 in sliding fit with the sliding strips 1332, and the electric devices and tools such as the rheostat 6, the screwdriver can be placed in the storage compartments for storage.
In the above scheme, two lockers 11 which are symmetrically distributed and used for fixing the shield 2 are arranged on the front side and the rear side of the base 1 in the structure, the lockers 11 can be case locks used for cases in the prior art, the specific structure of the lockers belongs to the conventional technology, the specific structure is not described in detail herein, a bayonet 21 which is matched with the lockers 11 is formed in the shield 2 in the structure, a handle is arranged at the top of the shield 2, the shield 2 plays a dustproof role, and the handle arranged on the shield 2 is a portable device.
While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.
Claims (5)
1. The utility model provides an alternating current network relay protection sensitivity determining means, includes base (1) and is located guard shield (2) in the outside of base (1), its characterized in that: the device comprises a base (1), wherein an installation box (12) and a control box (13) positioned opposite to the installation box (12) are arranged at the top of the base, a touch screen (131) is embedded on a front panel of the control box (13), an installation cavity and a storage cavity are formed in the control box (13) through a partition plate (132), a detector electrically connected with the touch screen (131) is arranged in the installation cavity, and a storage rack (133) is arranged in the storage cavity in a sliding mode;
the varistor (6) is arranged between the mounting box (12) and the control box (13) and can flexibly configure resistance, the varistor (6) comprises an insulating porcelain cylinder (61) and a resistance wire (62) wound on the outer wall of the insulating porcelain cylinder (61), screw sleeves (67) are arranged at two ends in the insulating porcelain cylinder (61), and clamping seats (66) and clamping heads (65) are respectively arranged at the two screw sleeves (67);
the adjustable supporting part (8) is arranged at the bottom of the rheostat (6), the supporting part (8) comprises a guide rail (81), a supporting component (82) arranged on the guide rail (81) in a sliding mode and a binding band (83) used for fixing the rheostat (6), the guide rail (81) is fixed at the top of the base (1), and the supporting component (82) is used for supporting the rheostat (6);
the adjusting part (3) is arranged at one side of the rheostat (6), the adjusting part (3) is used for changing the resistance of the rheostat (6), the adjusting part (3) comprises a control assembly, an adjusting screw rod (31), a metal rod (37) and a sliding assembly (38) which is arranged on the outer wall of the metal rod (37) in a sliding manner, two ends of the metal rod (37) are provided with upper binding posts, and the two upper binding posts are respectively fixed on the outer walls of the mounting box (12) and the control box (13);
the wire winding part (5) is arranged at one side of the adjusting part (3), the wire winding part (5) is used for arranging wires, the wire winding part (5) comprises a fixing frame (51) and a moving plate (52) arranged at the top of the fixing frame (51), the fixing frame (51) is fixed at the top of the base (1), a plurality of wire reels (53) distributed in a linear array are rotatably arranged at the inner side of the fixing frame (51), and a plurality of driving components distributed in a linear array and used for driving the wire reels (53) are arranged at the inner side of the moving plate (52);
the relay protection device (4) is arranged on one side of the winding part (5), and the clamping part is used for fixing the relay protection device (4);
metal hoops (63) for fixing resistance wires (62) are sleeved at two ends of the outer wall of the insulating porcelain tube (61), lower binding posts (64) are mounted on the metal hoops (63), and insulating paint is coated on the outer wall of the resistance wires (62);
the clamping seat (66) comprises a clamping sleeve (661) in threaded connection with the threaded sleeve (67) and a clamping cylinder (662) fixed inside the clamping sleeve (661), six L-shaped buckling grooves (6621) distributed in an annular array are formed in the outer wall of the clamping cylinder (662), and a permanent magnet (663) is embedded in the clamping cylinder (662);
the clamping head (65) comprises a clamping cylinder (651) and a threaded part (652) which is arranged on the outer wall of one end of the clamping cylinder (651) and is in threaded connection with a threaded sleeve (67), permanent magnet columns (653) which are magnetically attracted with the permanent magnets (663) are arranged in the clamping cylinder (651), and six buckling blocks (654) which are distributed in an annular array mode around the permanent magnet columns (653) and are used for adapting to L-shaped buckling grooves (6621) are arranged on the inner wall of the clamping cylinder (651);
a convex-shaped sliding groove (811) is formed in the center line position of the guide rail (81), two strip-shaped holes (812) communicated with the convex-shaped sliding groove (811) are formed in the top of the guide rail (81), and the two strip-shaped holes (812) are symmetrically arranged;
the support assembly (82) comprises a sliding lug (822) which is arranged in the convex sliding groove (811) in a sliding mode and a T-shaped support block (821) which is fixed at the top of the sliding lug (822), a V-shaped groove is formed in the top of the T-shaped support block (821), through holes (8212) for binding bands (83) are formed in two sides of the V-shaped groove, a positioning fixture block (8211) is fixed at the center position of the bottom of the T-shaped support block (821), and a threaded through hole (8213) is formed in the center position of the positioning fixture block (8211);
a positioning clamping groove (8221) matched with the positioning clamping block (8211) is formed in the top of the sliding lug (822), a bolt which is in threaded connection with the threaded through hole (8213) and used for fixing the T-shaped supporting block (821) is arranged in a through hole on one side of the positioning clamping groove (8221), threaded rods (823) are symmetrically arranged on two sides of the positioning clamping groove (8221), the threaded rods (823) are positioned in the strip-shaped holes (812), and a fastening nut (824) used for locking the sliding lug (822) is connected to the outer wall of the threaded rods (823) in a threaded mode, and the fastening nut (824) is positioned at the top of the guide rail (81);
the control assembly comprises a motor (32) arranged in the mounting box (12), an output shaft key of the motor (32) is connected with a sector gear (33), the top of the sector gear (33) is connected with a transmission gear (34) in a meshed mode, one end of the adjusting screw (31) is rotationally connected with the control box (13) through a bearing, the other end of the adjusting screw (31) penetrates through the mounting box (12) and then is fixedly connected with the transmission gear (34), the other end of the adjusting screw (31) is rotationally connected with the mounting box (12) through a bearing, a nut sliding seat (35) horizontally moving along the adjusting screw (31) is sleeved on the outer wall of the adjusting screw (31), and a mounting bracket (36) is mounted on one side of the nut sliding seat (35);
the sliding assembly (38) comprises a U-shaped piece and a splayed sliding sheet, the U-shaped piece is arranged on the outer wall of the metal rod (37) in a sliding mode, the splayed sliding sheet is fixed inside the U-shaped piece, the top of the U-shaped piece is fixedly connected with the bottom of the mounting bracket (36), and the splayed sliding sheet is arranged on the outer wall of the resistance wire (62) in a sliding mode;
a group of sliding grooves (511) distributed in a linear array are formed in two sides of the fixed frame (51), semicircular through holes (512) communicated with the sliding grooves (511) are formed in the bottoms of the sliding grooves (511), two telescopic rods (54) used for connecting the moving plates (52) are symmetrically arranged on the inner sides of the fixed frame (51), two groups of limiting plates (521) distributed in a linear array and used for being in sliding fit with the sliding grooves (511) are arranged at the bottoms of the moving plates (52), and the semicircular through holes (512) are formed in the bottoms of the limiting plates (521);
the winding frame (53) comprises a support disc (531) and a central winding rod (532) fixed at the central position of the top of the support disc (531), the support disc (531) is also provided with a plurality of peripheral winding rods (533) which are distributed around the central winding rod (532) in a ring array mode and are used for winding wires, the upper ends of the central winding rod (532) and the peripheral winding rods (533) are sleeved and fixed with limiting rings (534), and the central position of the bottom of the support disc (531) is provided with rotating columns which are rotationally connected with a fixing frame (51) through bearings;
the driving assembly comprises a connecting disc (522) and a shaft rod which is rotatably arranged on the movable plate (52) through a bearing, a handle (523) is arranged at the upper end of the shaft rod, the lower end of the shaft rod is fixedly connected with the top of the connecting disc (522), and a slot which is matched with the central winding rod (532) and the peripheral winding rod (533) is formed in the bottom of the connecting disc (522).
2. The alternating current power grid relay protection sensitivity determination device according to claim 1, wherein: the clamping part comprises a horizontal adjusting module (7), L-shaped clamping plates (71) used for clamping the relay protection device (4) are arranged on two moving bodies with opposite movement directions of the horizontal adjusting module (7), and the top of the base (1) is provided with a mounting groove used for fixing the horizontal adjusting module (7).
3. The alternating current power grid relay protection sensitivity determination device according to claim 1, wherein: the storage rack is characterized in that at least two storage grids are arranged in the storage rack (133) through a partition plate (1331), a cross rod (1333) is arranged at the top of the storage rack (133), sliding strips (1332) are symmetrically arranged on two sides of the storage rack (133), and sliding channels (134) which are in sliding fit with the sliding strips (1332) are formed in the control box (13) and the partition plate (132).
4. The alternating current power grid relay protection sensitivity determination device according to claim 1, wherein: the locking device is characterized in that two locking devices (11) which are symmetrically distributed and used for fixing the protective cover (2) are arranged on the front side and the rear side of the base (1), a bayonet (21) which is matched with the locking devices (11) is formed in the protective cover (2), and a handle is arranged at the top of the protective cover (2).
5. An ac power grid relay protection sensitivity determining method, comprising the ac power grid relay protection sensitivity determining device according to any one of claims 1 to 4, characterized in that: the method comprises the following steps of
Step one: determining a resistance range, selecting a single varistor (6) with a proper resistance value or assembling and connecting two or more varistors (6) in series to form a new varistor (6);
step two: the varistor (6) is fixed, the position of the supporting component (82) is adjusted through the matching of the guide rail (81) and the supporting component (82), and after the varistor (6) is supported by the supporting component (82), the varistor (6) is fixed by using the binding band (83);
step three: the relay protection device (4) is fixed, and the relay protection device (4) is clamped and fixed through the cooperation of the horizontal adjusting module (7) and the L-shaped clamping plate (71);
step four: wiring, namely discharging a wire wound on the winding frame (53) through the cooperation of the driving assembly and the winding frame (53), connecting the upper wiring terminal and the lower wiring terminal (64) into a circuit by using the wire in a top-to-bottom wiring mode, electrically connecting the rheostat (6) with the relay protection device (4), and connecting the detector into the circuit by using the wire;
step five: the sensitivity is determined, the number of turns of the resistor wire (62) connected to the circuit is changed through the matching of the control component and the adjusting screw rod (31), the resistance value of the rheostat (6) connected to the circuit is changed, the voltage is further changed, and the detector can display the response of the relay protection device (4) under a plurality of groups of different voltages in real time through signal conversion and then through the touch screen (131);
step six: and (3) replacing the relay protection device (4), disconnecting the power supply after the detection is finished, removing the lead of the relay protection device (4), removing the relay protection device (4) fixed in the third step, replacing the next relay protection device (4), and detecting for a new round.
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| CN202211072986.4A CN115420981B (en) | 2022-09-02 | 2022-09-02 | Alternating current power grid relay protection sensitivity determination method and device |
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| CN202211072986.4A CN115420981B (en) | 2022-09-02 | 2022-09-02 | Alternating current power grid relay protection sensitivity determination method and device |
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| CN115420981A (en) | 2022-12-02 |
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