CN113702867B - Leakage detection device for series connection of current transformer circuits and application method thereof - Google Patents
Leakage detection device for series connection of current transformer circuits and application method thereof Download PDFInfo
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- CN113702867B CN113702867B CN202111015948.0A CN202111015948A CN113702867B CN 113702867 B CN113702867 B CN 113702867B CN 202111015948 A CN202111015948 A CN 202111015948A CN 113702867 B CN113702867 B CN 113702867B
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- 238000001514 detection method Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 88
- 238000003825 pressing Methods 0.000 claims abstract description 58
- 238000009434 installation Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims abstract description 5
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- 210000001503 joint Anatomy 0.000 claims description 19
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Classifications
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model provides a leakage detection device of a series current transformer circuit and a use method thereof, wherein a current transformer body is fixedly connected with a support column at the bottom of a leakage detector through a mounting tube; the front side and the rear side of the mounting tube are provided with fixed clamping seats; the fixing clamping seat positioned at the front side of the mounting tube is provided with an adjusting rotating rod and a binding post, the top of the binding post is provided with a pressing plate, and the pressing plate is driven by the rotating adjusting rotating rod to realize the compression joint of the end part of the test wire and the binding post; a rotating frame is arranged on the fixed clamping seat at the rear side of the installation tube, and the rotating frame is used for winding and unwinding the test wires. The quick connection and stable support of the current transformer body and the leakage detector are realized, and the installation and the disassembly are convenient; the test wire access mode is simple, utilizes the clamp plate to compress tightly test wire tip, adjusts and controls locking mechanism simultaneously, uses the rotating turret to receive and release test wire, utilizes torsion spring to make the rotating turret retract to the installation intracavity, avoids test wire to be in a mess stack, compact structure.
Description
Technical Field
The invention relates to the technical field of leakage detection in circuits, in particular to a leakage detection device for a series current transformer circuit and a use method thereof.
Background
The current transformer principle is based on electromagnetic induction principle, and consists of a closed iron core and a winding. Its primary winding turns are very few, and is strung in the line where the current is needed to be measured, so it often has the whole current of the line flowing through it; the secondary winding has a large number of turns and is connected in series with the measuring instrument and the protection loop.
The leakage detection device is a device and instrument for detecting the leakage phenomenon, can detect the action current of the current type electric shock protector and the unbalanced leakage current which is smaller than the action of the current type electric shock protector, and can distinguish the leakage voltage harmful to the human body and the induced voltage harmless to the human body; the leakage phenomenon of the electric appliance can be effectively detected.
In the prior art, chinese patent (CN 201820941260.2) discloses a "scattered line leakage detection device of a serial current transformer", which comprises a three-phase air switch, a synchronous loss matching current transformer and a tripping coil, wherein the three-phase air switch adopts a switch with a tripping protection coil, the synchronous loss matching current transformer adopts a mode of halving the number of turns of a secondary induction coil on the basis of a standard device, namely, two groups of secondary induction coils are conveniently matched with other standard devices after passing through the serial phase same group of standard current transformers, and the purpose is that in the installation of a three-phase four-wire electric disc, most of three-phase power lines and zero line wiring terminal rows are separated by a certain distance, so that the single group of current transformers are inconvenient to penetrate into three-phase four lines, and the tripping coil is the sum of current loss generated by the synchronous loss matching current transformer penetrating into three phases and change, and the leakage tripping protection is promoted by a circuit control switch. In the leakage detection device of the series connection current transformer circuit based on the technology of the patent, because the current transformer and the leakage detector are connected through wires, a stable fixed connection structure is lacked, meanwhile, the wires are messy to store and use, the device clamps the end part of the test wire by using bolts generally, the clamping pressure of the device is not easy to adjust, the end part of the test wire is easy to break when the pressure is overlarge, and meanwhile, each bolt needs to be locked independently, so that the operation process of the device is complex.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a leakage detection device for a series current transformer circuit and a use method thereof.
The invention adopts the following technical scheme.
The leakage detection device of the serial current transformer circuit comprises a current transformer body, a leakage detector and a test wire, wherein one end of the test wire is electrically connected with the current transformer body, and the other end of the test wire is electrically connected with a binding post of the leakage detector;
the current transformer body is fixedly connected with a support column at the bottom of the leakage detector through a mounting tube;
the front side and the rear side of the mounting tube are provided with fixed clamping seats; the fixing clamping seat positioned at the front side of the mounting tube is provided with an adjusting rotating rod and a binding post, the top of the binding post is provided with a pressing plate, and the pressing plate is driven by the rotating adjusting rotating rod to realize the compression joint of the end part of the test wire and the binding post; a rotating frame is arranged on the fixed clamping seat at the rear side of the installation tube, and the rotating frame is used for winding and unwinding the test wires.
Preferably, the bottom of the electric leakage detector is provided with a support column, one side of the bottom end of the support column is provided with a connecting sleeve opening, and the connecting sleeve opening is fixedly connected with the mounting pipe in a threaded mode.
Preferably, the bottom of the current transformer body is provided with a supporting plate, and the bottom of the supporting plate is provided with a connecting sleeve;
the backup pad supports in the top of the rectangular frame structure that two fixed cassette constitute, and adapter sleeve sliding sleeve suit is on the installation tube.
Further, two ends of a rectangular frame structure formed by the two fixing clamping seats are provided with fixing rings; the fixed ring is sleeved on the mounting pipe and is locked by bolts.
Preferably, a first mounting cavity is formed in a fixing clamping seat positioned at the front side of the mounting tube, and a binding post, a pressing plate and a locking mechanism are arranged in the first mounting cavity;
one end of the fixed clamping seat positioned at the front side of the installation tube is provided with an adjusting rotating rod, and the adjusting rotating rod is rotationally connected with the fixed clamping seat where the adjusting rotating rod is positioned through a bearing.
The terminal includes: the device comprises a supporting frame, a wiring groove, a limiting column and a through hole; the binding post is a U-shaped groove with a downward opening, and through holes are symmetrically formed in two side walls of the U-shaped groove; the top of terminal is equipped with the support frame, and the clamp plate is located between two risers of support frame, is equipped with two wiring grooves on the support frame bottom plate, and two wiring grooves are symmetrical mode distribution, and the top of support frame is equipped with two spacing posts, and two spacing posts are vertical parallel mode distribution.
Two limit round holes are formed in the pressing plate, the limit round holes correspond to the limit posts, and the limit posts are in sliding connection with the pressing plate through the limit round holes.
The locking mechanism comprises two groups of clamping hooks, a rotating rod, a first connecting rod, a second connecting rod and an extension spring;
each group of clamping hooks comprises two clamping hooks with inverted L-shaped structures, wherein the two clamping hooks are distributed in a front-back symmetrical mode, a rotating rod is arranged between the two clamping hooks, the clamping hooks are rotationally connected with the fixed clamping seat through the rotating rod, a first connecting rod and a second connecting rod are further arranged between the two clamping hooks, and the first connecting rod and the second connecting rod are both positioned below the rotating rod; an extension spring is arranged between the two groups of clamping hooks, and two ends of the extension spring are connected with the second connecting rod.
Each first connecting rod comprises a sliding rod and a butt-joint sliding groove;
the middle position of each first connecting rod is rotatably provided with a sliding rod, and the two sliding rods are symmetrically distributed; the tip of slide bar is equipped with the butt joint spout, and the slide bar passes through-hole and terminal sliding connection, and the butt joint spout is located the U type inslot of terminal.
The adjusting rotating rod comprises cams, two cams are arranged on the adjusting rotating rod, the cams correspond to the butt-joint sliding grooves in position, and the cams are clamped with the butt-joint sliding grooves.
Preferably, a second installation cavity is formed in the fixing clamping seat at the rear side of the installation tube, a rotating frame is arranged in the second installation cavity, and the test wire is wound on the rotating frame.
The rotating frame comprises a wire wheel, a fixed frame and a torsion spring;
the rotating frame is rotatably provided with a wire wheel through a rotating shaft, the wire wheel is wound and connected with a test wire, the fixing frame is fixedly arranged on the side wall of the second installation cavity through a bolt, the rotating frame is rotatably connected with the fixing frame through a pin shaft, two torsion springs are sleeved on the pin shaft of the rotating frame, and the torsion springs are respectively connected with the rotating frame and the fixing frame in a clamping mode.
The use method of the leakage detection device of the serial current transformer circuit comprises the following steps:
step 1, before detection, fixedly connecting a current transformer body with a leakage detector, and locking and connecting the current transformer body with the leakage detector by using a bolt;
step 2, releasing the test wire from the rotating frame;
step 3, arranging the end of the test wire in the binding post, rotating the adjusting rotating rod, and enabling the pressing plate to clamp and connect the end of the test wire through the locking mechanism;
and 4, after the detection is finished and the end part of the test wire is connected with the binding post separately, the rotating frame is used for accommodating the test wire.
Preferably, step 1 comprises:
step 1.1, a connecting sleeve of a current transformer body is sleeved on an installation pipe in a sliding manner;
step 1.2, fixedly connecting an installation pipe with a connection sleeve port of the electric leakage detector in a threaded manner; meanwhile, fixing rings arranged at the left end and the right end of the fixing clamping seat are sleeved on the mounting pipe;
and 1.3, locking and connecting through bolts.
Preferably, in step 2 and step 4, the test wire is wound and unwound by a rotating wire wheel on the turret, and the turret is retracted into the mounting cavity by a torsion spring.
Preferably, step 3 comprises:
step 3.1, rotating the adjusting rotating rod, enabling the cam to rotate around the adjusting rotating rod as an axis, separating from the butting sliding groove, enabling the cam to be left and right under the elasticity of the stretching spring, enabling the front clamping hook and the rear clamping hook to do arc motion around the rotating rod as an axis, releasing downward pressure of the clamping hook on the pressing plate, and placing the end part of the test wire between the wiring groove of the wiring terminal and the pressing plate;
and 3.2, rotating the adjusting rotating rod to enable the cam to be clamped with the butt joint sliding groove, respectively pushing the clamping hooks on two sides through the two sliding rods, applying downward pressure on the pressing plate by the top of the clamping hooks, and clamping the end part of the test wire in the butt joint sliding groove by the pressing plate.
The invention has the beneficial effects that compared with the prior art:
1. the current transformer body is sleeved on the mounting tube in a sliding manner through the connecting sleeve, the mounting tube is fixedly connected with the connecting sleeve opening in a threaded manner, the left end and the right end of the two fixing clamping seats are respectively provided with the fixing rings, the fixing rings are sleeved on the mounting tube and controlled through the locking bolts, so that the current transformer body can be quickly connected with the electric leakage detector, the stable support of the current transformer body is ensured through the two fixing clamping seats, the storage and the use are more convenient, and the connecting structure is simple and is convenient to install and detach;
2. because the two limiting round holes are formed in the pressing plate, the limiting round holes correspond to the limiting columns, the limiting columns are in sliding connection with the pressing plate through the limiting round holes, in the using process, the end parts of the test wires are arranged in the wire connecting grooves of the supporting frame, the pressing plate can slide up and down along the limiting columns, the end parts of the test wires are pressed by the pressing plate, the test wires are connected in a simple mode, and damage to the end parts of the test wires due to clamping through bolts can be avoided;
3. according to the device, the adjusting rotating rod is rotated, the cam rotates by taking the adjusting rotating rod as an axis and is separated from the butt joint sliding groove, the front clamping hook and the rear clamping hook are subjected to elasticity of the stretching spring and do arc motion by taking the rotating rod as an axis, the downward pressure of the clamping hooks on the pressing plate is relieved, the end part of a test wire can be placed between the wire connecting groove and the pressing plate, the adjusting rotating rod is rotated at the same time, the cam is clamped with the butt joint sliding groove, the clamping hooks on two sides are respectively pushed by two sliding rods, so that the top of the clamping hooks can apply downward pressure on the pressing plate, the end part of the test wire in the butt joint wire connecting groove of the pressing plate is clamped, and two locking mechanisms can be regulated and controlled simultaneously, so that the device is more flexible and convenient to use;
4. the device has set up the rotating turret, receive and releases the test wire through rotating the line wheel pair, utilizes the elastic action of two torsion springs simultaneously, and the rotating turret can retract to the second installation intracavity, avoids test wire to be mixed and disorderly to stack, guarantees that the structure is compacter.
Drawings
FIG. 1 is a schematic diagram of an axial view of a leakage detection device connected in series with a current transformer circuit according to the present invention;
FIG. 2 is a schematic diagram of the structure of a current transformer body in a leakage detection device with series connection of current transformer lines according to the present invention;
FIG. 3 is a schematic view of the structure of the leakage detection device of the present invention after the leakage detector and the mounting tube are removed;
FIG. 4 is a schematic diagram of the structure of the leakage detection device of the present invention with the leakage detector and the current transformer body removed;
fig. 5 is a schematic structural diagram of a front end fixing holder in a leakage detecting device connected in series with a current transformer circuit according to the present invention;
FIG. 6 is a schematic diagram showing the connection state of a binding post, a pressing plate, a locking mechanism and an adjusting rotating rod in the leakage detecting device connected with a current transformer circuit in series;
FIG. 7 is a schematic diagram showing the explosive state of the binding post, the pressing plate, the locking mechanism and the adjusting rotating rod in the leakage detecting device of the serial current transformer circuit of the invention;
FIG. 8 is a schematic diagram of a turret and test wires in a leakage detection apparatus for serially connecting current transformer lines according to the present invention;
the reference numerals in fig. 1 to 8 are explained as follows:
1-an electric leakage detector; 101-supporting columns; 102-connecting a sleeve port;
2-a current transformer body; 201-a support plate; 202-connecting a sleeve;
3-mounting a tube;
4-fixing the clamping seat; 401-a fixed ring; 402-a first mounting cavity; 403-a second mounting cavity;
5-binding posts; 501-supporting frames; 502-wiring grooves; 503-limiting columns; 504—a via;
6-pressing plates; 601-limiting round holes;
7-a locking mechanism; 701-clamping hook; 702-rotating a lever; 703-a first connecting rod;
7031-slide bar; 7032-butt-joint sliding groove; 704-a second connecting rod; 705-stretching a spring;
8-adjusting the rotating rod; 801-cam;
9-rotating frames; 901-a wire wheel; 902-a fixing frame; 903—torsion springs;
10-testing the wire; 11-wiring ports;
fig. 9 is a block diagram illustrating steps of a method for using a leakage detection device connected in series with a current transformer circuit according to the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.
Referring to fig. 1, a leakage detection device for a serial connection of current transformer lines includes a current transformer body 2, a leakage detector 1 and a test wire 10, wherein one end of the test wire 10 is electrically connected with the current transformer body 2, and the other end is electrically connected with a binding post of the leakage detector 1.
The current transformer body 2 is fixedly connected with a support column 101 at the bottom of the leakage detector 1 through a mounting tube 3.
The front side and the rear side of the mounting tube 3 are provided with fixed clamping seats 4; the fixing clamping seat 4 positioned at the front side of the mounting tube is provided with an adjusting rotating rod 8 and a binding post 5, the top of the binding post 5 is provided with a pressing plate 6, and the pressing plate 6 is driven by the rotating adjusting rod 8, so that the end part of the test wire 10 is in pressure connection with the binding post 5; the fixed clamping seat 4 positioned at the rear side of the installation tube 3 is provided with a rotating frame 9, and the rotating frame 9 is used for winding and unwinding the test wire 10.
In the preferred embodiment of the present invention, the number of the binding posts 5 is two, and the two binding posts are in a state of one working and one standby, and the number of the binding posts adopted by the present invention is a non-limiting preferred choice.
As shown in fig. 1, preferably, a support column 101 is disposed at the bottom of the leakage detector 1, a connection socket 102 is disposed at one side of the bottom end of the support column 101, and the connection socket 102 is fixedly connected with the mounting tube 3 by means of threads.
As shown in fig. 2, preferably, a support plate 201 is provided at the bottom of the current transformer body 2, and a connection sleeve 202 is provided at the bottom of the support plate 201.
As shown in fig. 2 and 3, the supporting plate 201 is supported on top of a rectangular frame structure formed by two fixing holders 4, and the connecting sleeve 202 is slidably sleeved on the mounting tube 3.
Further, as shown in fig. 2 and 4, two ends of the rectangular frame structure formed by the two fixing holders 4 are provided with fixing rings 401; the fixing collar 401 is fitted over the mounting tube 3 and is locked by bolts.
It can be seen that the current transformer body 2 can be quickly connected with the leakage detector 1, and the stable support of the current transformer body 2 is ensured by the two fixing clamping seats 4.
As shown in fig. 5, preferably, a first installation cavity 402 is formed on the fixing clip seat 4 located at the front side of the installation tube 3, and a binding post 5, a pressing plate 6 and a locking mechanism 7 are disposed in the first installation cavity 402.
As shown in fig. 5, an adjusting rotating rod 8 is arranged at one end of the fixing clamping seat 4 positioned at the front side of the installation tube 3, and the adjusting rotating rod 8 is rotatably connected with the fixing clamping seat 4 where the adjusting rotating rod 8 is positioned through a bearing.
As shown in fig. 6 and 7, the post 5 includes: the wire connecting device comprises a supporting frame 501, a wire connecting groove 502, a limiting post 503 and a through hole 504; the binding post 5 is a U-shaped groove with a downward opening, and through holes 504 are symmetrically formed in two side walls of the U-shaped groove; the top of terminal 5 is equipped with support frame 501, and clamp plate 6 is located between two risers of support frame 501, is equipped with two wiring grooves 502 on the support frame 501 bottom plate, and two wiring grooves 502 are symmetrical mode distribution, and the top of support frame 501 is equipped with two spacing posts 503, and two spacing posts 503 are vertical parallel mode distribution.
Two limit round holes 601 are formed in the pressing plate 6, the limit round holes 601 correspond to the limit posts 503, and the limit posts 503 are in sliding connection with the pressing plate 6 through the limit round holes 601.
During the use, test wire tip sets up in the wiring groove 502 of support frame 501, and clamp plate 6 can slide from top to bottom along spacing post 503, compresses tightly test wire tip with clamp plate 6, and wherein test wire access mode is simple.
As shown in fig. 6 and 7, the locking mechanism 7 includes two sets of holding hooks, a rotating lever 702, a first connecting lever 703, a second connecting lever 704, and a tension spring 705.
Each group of clamping hooks comprises two clamping hooks 701 with inverted L-shaped structures, wherein the two clamping hooks 701 are distributed in a front-back symmetrical mode, a rotating rod 702 is arranged between the two clamping hooks 701, the clamping hooks 701 are rotationally connected with the fixed clamping seat 4 through the rotating rod 702, a first connecting rod 703 and a second connecting rod 704 are further arranged between the two clamping hooks 701, and the first connecting rod 703 and the second connecting rod 704 are positioned below the rotating rod 702; an extension spring 705 is arranged between the two groups of clamping hooks, and two ends of the extension spring 705 are connected with a second connecting rod 704.
Each first connecting rod 703 includes a slide bar 7031 and a docking chute 7302.
A sliding rod 7031 is rotatably arranged in the middle of each first connecting rod 703, and the two sliding rods 7031 are symmetrically distributed; the end of the slide bar 7031 is provided with a butt-joint slide groove 7032, the slide bar 7031 is in sliding connection with the binding post 5 through the through hole 504, and the butt-joint slide groove 7032 is positioned in the U-shaped groove of the binding post 5.
The adjusting rotating rod 8 comprises a cam 801, two cams 801 are arranged on the adjusting rotating rod 8, the positions of the cams 801 correspond to those of the butt joint sliding grooves 7032, and the cams 801 are clamped with the butt joint sliding grooves 7032.
Through rotating the adjusting rotating rod 8, the cam 801 rotates by taking the adjusting rotating rod 8 as the axis, and is separated from the butt joint sliding groove 7032, the front clamping hooks 701 and the rear clamping hooks 701 move in an arc way by taking the rotating rod 702 as the axis, the downward pressure of the clamping hooks 701 on the pressing plate 6 is relieved, the end part of a test wire can be placed between the wiring groove 502 and the pressing plate 6, meanwhile, the adjusting rotating rod 8 is rotated, the cam 801 is clamped with the butt joint sliding groove 7032, the clamping hooks 701 on two sides are respectively pushed by two sliding rods 7031, so that the top of the clamping hooks 701 can apply downward pressure on the pressing plate 6, and the end part of the test wire in the butt joint wiring groove 502 of the pressing plate 6 is ensured to be clamped.
In another embodiment, the limiting post 503 is sleeved with a compression spring, and the compression spring is supported between the pressing plate 6 and the supporting frame 501, so that the pressing plate 6 is more stable when clamping the end part of the test wire, and the clamping force between the pressing plate 6 and the wiring groove 502 can be adjusted, so that the end part of the test wire is prevented from being damaged due to overlarge clamping force.
Preferably, a second installation cavity 403 is formed on the fixing clamping seat 4 at the rear side of the installation tube, a rotating frame 9 is arranged in the second installation cavity 403, and the test wire 10 is wound on the rotating frame 9.
As shown in fig. 8, the turret 9 includes a wire wheel 901, a fixed mount 902, and a torsion spring 903.
The rotating frame 9 is rotatably provided with a wire wheel 901 through a rotating shaft, the wire wheel 901 is wound and connected with a test wire 10, the fixed frame 902 is fixedly arranged on the side wall of the second installation cavity 403 through bolts, the rotating frame 9 is rotatably connected with the fixed frame 902 through a pin shaft, the pin shaft of the rotating frame 9 is sleeved with two torsion springs 903, and the torsion springs 903 are respectively clamped with the rotating frame 9 and the fixed frame 902.
Because the rotating frame 9 is arranged, the test wire 10 is retracted and released through the rotating wire wheel 901, and meanwhile, the rotating frame 9 can retract into the second mounting cavity 403 under the elastic action of the two torsion springs 903, so that the test wire 10 is prevented from being stacked in disorder, and the structure is ensured to be more compact; the test wire 10 is electrically connected with the current transformer body 2, and a wiring port 11 is arranged at the end of the test wire 10.
As shown in fig. 9, a use method of a leakage detection device of a serial current transformer circuit includes:
and step 1, before detection, fixedly connecting the current transformer body with the electric leakage detector, and locking and connecting by using a bolt.
Specifically, step 1 includes:
step 1.1, a connecting sleeve of a current transformer body is sleeved on an installation pipe in a sliding manner;
step 1.2, fixedly connecting an installation pipe with a connection sleeve port of the electric leakage detector in a threaded manner; meanwhile, fixing rings arranged at the left end and the right end of the fixing clamping seat are sleeved on the mounting pipe;
and 1.3, locking and connecting through bolts.
In the preferred embodiment, the current transformer body 2 is slidably sleeved on the mounting tube 3 through the connecting sleeve 202, the mounting tube 3 is fixedly connected with the connecting sleeve opening 102 in a threaded manner, the left end and the right end of the two fixing clamping seats 4 are respectively provided with a fixing ring 401, the fixing rings 401 are sleeved on the mounting tube 3 and controlled through locking bolts, and therefore, the current transformer body 2 can be quickly connected with the leakage detector 1, and stable support of the current transformer body 2 is ensured through the two fixing clamping seats 4.
And 2, releasing the test wire from the rotating frame.
And 3, arranging the end of the test wire in the binding post, rotating the adjusting rotating rod, and clamping and connecting the end of the test wire by the pressing plate through the locking mechanism.
Specifically, step 3 includes:
and 3.1, rotating the adjusting rotating rod, enabling the cam to rotate by taking the adjusting rotating rod as an axis, separating from the butting sliding groove, enabling the cam to be subjected to the elasticity of the stretching spring, enabling the front clamping hook and the rear clamping hook to do arc motion by taking the rotating rod as an axis, releasing downward pressure of the clamping hook on the pressing plate, and placing the end part of the test wire between the wiring groove of the wiring terminal and the pressing plate.
And 3.2, rotating the adjusting rotating rod to enable the cam to be clamped with the butt joint sliding groove, respectively pushing the clamping hooks on two sides through the two sliding rods, applying downward pressure on the pressing plate by the top of the clamping hooks, and clamping the end part of the test wire in the butt joint sliding groove by the pressing plate.
When the test wire connecting device is used, the end part of a test wire is arranged in the wiring groove 502 of the support frame 501, the pressing plate 6 can slide up and down along the limiting post 503, and the end part of the test wire is pressed by the pressing plate 6, wherein the test wire connecting mode is simple; and to ensure that the clamp 6 clamps the ends of the test wires within the wire chase 502.
And 4, after the detection is finished and the end part of the test wire is connected with the binding post separately, the rotating frame is used for accommodating the test wire.
Specifically, in step 2 and step 4, the test wire is wound and unwound by the rotating wire wheel on the rotating frame, and the rotating frame is retracted into the mounting cavity by using the torsion spring.
In the use, at first, this device has set up rotating turret 9, receive and releases connecting wire 10 through rotating wire wheel 901, utilizes the elastic action of two torsion springs 903 simultaneously, and rotating turret 9 can retract in the second installation cavity 403, avoids connecting wire 10 to be in a mess to stack, guarantees that the structure is compacter.
The invention has the beneficial effects that compared with the prior art:
1. the current transformer body is sleeved on the mounting tube in a sliding manner through the connecting sleeve, the mounting tube is fixedly connected with the connecting sleeve opening in a threaded manner, the left end and the right end of the two fixing clamping seats are respectively provided with the fixing rings, the fixing rings are sleeved on the mounting tube and controlled through the locking bolts, so that the current transformer body can be quickly connected with the electric leakage detector, the stable support of the current transformer body is ensured through the two fixing clamping seats, the storage and the use are more convenient, and the connecting structure is simple and is convenient to install and detach;
2. because the two limiting round holes are formed in the pressing plate, the limiting round holes correspond to the limiting columns, the limiting columns are in sliding connection with the pressing plate through the limiting round holes, in the using process, the end parts of the test wires are arranged in the wire connecting grooves of the supporting frame, the pressing plate can slide up and down along the limiting columns, the end parts of the test wires are pressed by the pressing plate, the test wires are connected in a simple mode, and damage to the end parts of the test wires due to clamping through bolts can be avoided;
3. the device is characterized in that the rotating rod is rotated by rotating the cam, the cam rotates by taking the rotating rod as an axis and is separated from the butt joint sliding groove, the front clamping hook and the rear clamping hook are elastically left and right by the stretching spring, the rotating rod is taken as the axis to move, the clamping hooks release the downward pressure of the clamping plates, the end part of the test wire can be placed between the wire connecting groove and the clamping plates, the rotating rod is rotated simultaneously, the cam is clamped with the butt joint sliding groove, the clamping hooks on two sides are respectively pushed by the two sliding rods, the top of the clamping hooks can apply the downward pressure to the clamping plates, the clamping of the end part of the test wire in the butt joint wire connecting groove by the clamping plates is ensured, and the two locking mechanisms can be regulated and controlled simultaneously, so that the device is more flexible and convenient to use.
4. The device has set up the rotating turret, receive and releases the test wire through rotating the line wheel pair, utilizes the elastic action of two torsion springs simultaneously, and the rotating turret can retract to the second installation intracavity, avoids test wire to be mixed and disorderly to stack, guarantees that the structure is compacter.
While the applicant has described and illustrated the embodiments of the present invention in detail with reference to the drawings, it should be understood by those skilled in the art that the above embodiments are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not to limit the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.
Claims (15)
1. The leakage detection device of the serial connection current transformer circuit comprises a current transformer body, a leakage detector and a test wire, wherein one end of the test wire is electrically connected with the current transformer body, the other end of the test wire is electrically connected with a binding post of the leakage detector,
the current transformer body is fixedly connected with a support column at the bottom of the leakage detector through an installation tube;
the front side and the rear side of the mounting pipe are respectively provided with a fixing clamping seat; wherein, be located the installation tube front side be equipped with regulation bull stick and terminal on the fixed cassette, the top of terminal is equipped with the clamp plate, and the terminal is the U type groove of opening down, and the terminal includes: the wire connecting device comprises a supporting frame, a wiring groove and a limiting column, wherein the supporting frame is arranged at the top end of a binding post, the pressing plate is positioned between two vertical plates of the supporting frame, two wiring grooves are formed in a bottom plate of the supporting frame, two limiting columns are arranged at the top of the supporting frame, two limiting round holes are formed in the pressing plate, the limiting round holes correspond to the limiting columns, the limiting columns are in sliding connection with the pressing plate through the limiting round holes, the end part of a test wire is arranged in the wiring groove of the supporting frame, the pressing plate is driven by a rotating adjusting rotating rod, the pressing plate slides up and down along the limiting columns, the end part of the test wire is pressed by the pressing plate, and the end part of the test wire is in compression joint with the binding post; the fixed clamping seat positioned at the rear side of the installation tube is provided with a rotating frame, and the rotating frame is used for winding and unwinding the test wires.
2. The leakage detection apparatus for a serial current transformer circuit according to claim 1, wherein,
the leakage detector bottom is equipped with the support column, and one side of support column bottom is equipped with the connection sleeve mouth, and the connection sleeve mouth passes through the mode of screw thread and erection tube fixed connection.
3. The leakage detection apparatus for a serial current transformer circuit according to claim 1, wherein,
the bottom of the current transformer body is provided with a supporting plate, and the bottom of the supporting plate is provided with a connecting sleeve;
the supporting plate is supported at the top of a rectangular frame structure formed by the two fixing clamping seats, and the connecting sleeve is sleeved on the mounting tube in a sliding manner.
4. A leakage detection apparatus for a serial current transformer circuit according to claim 3, wherein,
both ends of a rectangular frame structure formed by the two fixing clamping seats are provided with fixing rings; the fixed ring is sleeved on the mounting pipe and is locked by bolts.
5. The leakage detection apparatus for a serial current transformer circuit according to claim 1, wherein,
a first mounting cavity is formed in the fixing clamping seat positioned at the front side of the mounting tube, and a binding post, a pressing plate and a locking mechanism are arranged in the first mounting cavity;
one end of the fixed clamping seat positioned at the front side of the installation tube is provided with an adjusting rotating rod, and the adjusting rotating rod is rotationally connected with the fixed clamping seat where the adjusting rotating rod is positioned through a bearing.
6. A leakage detection apparatus for a series current transformer circuit according to claim 1 or 5, wherein,
through holes are symmetrically formed in the two side walls of the binding post; two wiring grooves on the bottom plate of the support frame are symmetrically distributed, and two limit posts on the top of the support frame are vertically and parallelly distributed.
7. The leakage detection apparatus for a serial current transformer circuit according to claim 5, wherein,
the locking mechanism comprises two groups of clamping hooks, a rotating rod, a first connecting rod, a second connecting rod and an extension spring;
each group of clamping hooks comprises two clamping hooks with inverted L-shaped structures, wherein the two clamping hooks are distributed in a front-back symmetrical mode, a rotating rod is arranged between the two clamping hooks, the clamping hooks are rotationally connected with the fixed clamping seat through the rotating rod, a first connecting rod and a second connecting rod are further arranged between the two clamping hooks, and the first connecting rod and the second connecting rod are both positioned below the rotating rod; an extension spring is arranged between the two groups of clamping hooks, and two ends of the extension spring are connected with the second connecting rod.
8. The leakage detection apparatus for a serial current transformer circuit according to claim 7, wherein,
each first connecting rod comprises a sliding rod and a butt-joint sliding groove;
a sliding rod is rotatably arranged at the middle position of each first connecting rod, and the two sliding rods are symmetrically distributed; the end of the sliding rod is provided with a butt-joint sliding groove, the sliding rod is connected with the binding post in a sliding manner through a through hole, and the butt-joint sliding groove is positioned in the U-shaped groove of the binding post.
9. A leakage detection apparatus for a series current transformer circuit according to claim 1 or 5, wherein,
the adjusting rotating rod comprises cams, two cams are arranged on the adjusting rotating rod, the cams correspond to the butt-joint sliding grooves in position, and the cams are clamped with the butt-joint sliding grooves.
10. The leakage detection apparatus for a serial current transformer circuit according to claim 1, wherein,
the second installation cavity is formed in the fixing clamping seat and located at the rear side of the installation tube, a rotating frame is arranged in the second installation cavity, and the test wire is wound on the rotating frame.
11. A leakage detection apparatus for a series current transformer line according to claim 1 or 10, wherein,
the rotating frame comprises a wire wheel, a fixing frame and a torsion spring;
the rotating frame is rotatably provided with a wire wheel through a rotating shaft, the wire wheel is wound and connected with a test wire, the fixing frame is fixedly arranged on the side wall of the second installation cavity through a bolt, the rotating frame is rotatably connected with the fixing frame through a pin shaft, two torsion springs are sleeved on the pin shaft of the rotating frame, and the torsion springs are respectively connected with the rotating frame and the fixing frame in a clamping mode.
12. The use method of the leakage detection device of the serial current transformer circuit is applicable to the leakage detection device of the serial current transformer circuit according to any one of claims 1 to 11, and is characterized in that,
the using method comprises the following steps:
step 1, before detection, fixedly connecting a current transformer body with a leakage detector, and locking and connecting the current transformer body with the leakage detector by using a bolt;
step 2, releasing the test wire from the rotating frame;
step 3, arranging the end of the test wire in the binding post, rotating the adjusting rotating rod, and enabling the pressing plate to clamp and connect the end of the test wire through the locking mechanism;
and 4, after the detection is finished and the end part of the test wire is connected with the binding post separately, the rotating frame is used for accommodating the test wire.
13. The method of claim 12, wherein,
the step 1 comprises the following steps:
step 1.1, a connecting sleeve of a current transformer body is sleeved on an installation pipe in a sliding manner;
step 1.2, fixedly connecting an installation pipe with a connection sleeve port of the electric leakage detector in a threaded manner; meanwhile, fixing rings arranged at the left end and the right end of the fixing clamping seat are sleeved on the mounting pipe;
and 1.3, locking and connecting through bolts.
14. The method of claim 12, wherein,
in the step 2 and the step 4, the test wire is wound and unwound through the rotating wire wheel on the rotating frame, and the rotating frame is retracted into the mounting cavity by utilizing the torsion spring.
15. The method of claim 12, wherein,
the step 3 comprises the following steps:
step 3.1, rotating the adjusting rotating rod, enabling the cam to rotate around the adjusting rotating rod as an axis, separating from the butting sliding groove, enabling the cam to be left and right under the elasticity of the stretching spring, enabling the front clamping hook and the rear clamping hook to do arc motion around the rotating rod as an axis, releasing downward pressure of the clamping hook on the pressing plate, and placing the end part of the test wire between the wiring groove of the wiring terminal and the pressing plate;
and 3.2, rotating the adjusting rotating rod to enable the cam to be clamped with the butt joint sliding groove, respectively pushing the clamping hooks on two sides through the two sliding rods, applying downward pressure on the pressing plate by the top of the clamping hooks, and clamping the end part of the test wire in the butt joint sliding groove by the pressing plate.
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