CN114927335A

CN114927335A - Current transformer

Info

Publication number: CN114927335A
Application number: CN202210707642.XA
Authority: CN
Inventors: 胡萱彤
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-08-19

Abstract

The invention discloses a current transformer which comprises a first shell, a first connector, a second connector and an iron core, wherein the second shell is fixedly arranged on one side of the first shell, a creepage preventing mechanism is arranged in the second shell, a third shell is fixedly arranged on one side of the first shell, a resistance detecting mechanism is arranged in the third shell, and a wireless transmitting module is fixedly arranged at the top end of the third shell. According to the invention, the cover plate covers the first shell, the clamping plate is clamped in the clamping groove, then the screw rod is rotated by a user, the screw rod drives the piston plate to move along the inside of the first cavity, air in the air is extruded to the inside of the rubber sleeve, so that the rubber sleeve is expanded, the clamping plate is in interference connection with the clamping groove, the cover plate is prevented from being separated from the first shell, and the connecting position is sealed through the expanded rubber sleeve, so that the influence of the external environment on parts in the first shell is prevented.

Description

Current transformer

Technical Field

The invention relates to the field of current transformers, in particular to a current transformer.

Background

The current transformer is an instrument for measuring by converting a large primary side current into a small secondary side current according to the electromagnetic induction principle. The current transformer is composed of a closed iron core and a winding. The primary side winding of the transformer has few turns and is connected in a line of a current to be measured.

Current current transformer is when using because current transformer two survey can not open a way, and when the detecting instrument damages to open a way when using for a long time, resistance is infinitely great, can lead to current transformer's two to survey to open a way this moment, so make the unable balance of inside magnetic force cause inside high pressure, thereby huge potential safety hazard has, and use at current transformer, when short circuit appears in measuring instrument, the resistance undersize this moment, the instrument can't play normal measuring effect, can't obtain accurate current data this moment, influence current transformer's use, inside iron core can't laminate when using for a long time when current transformer uses simultaneously, influence the normal use of iron core, so need a current transformer to solve above-mentioned problem promptly.

Disclosure of Invention

The present invention is directed to a current transformer that solves the problems set forth in the background art described above.

In order to achieve the purpose, the invention provides the following technical scheme: the current transformer comprises a first shell, a first connector, a second connector and an iron core, wherein one side of the first shell is fixedly provided with a second shell, a creepage preventing mechanism is arranged in the second shell, one side of the first shell is fixedly provided with a third shell, a resistance detecting mechanism is arranged in the third shell, the top end of the third shell is fixedly provided with a wireless transmitting module, the top end of the first shell is fixedly provided with a copper sheet, a first chute is arranged in the first connector, an inserting block is movably clamped in the first chute, a first spring is fixedly arranged between the inserting block and the inner side wall of the first chute, the outer side of the first connector is sleeved with a movable ring through threads, the outer side of the first connector is fixedly provided with an annular air bag, an extruding mechanism is arranged in the first shell, and one side of the first shell is provided with a cover plate, the apron is inside to be provided with sealing mechanism, connect first connector and second connector when using, the inserted block inserts inside the second connector, and the inserted block extrudees first spring, first spring makes the inserted block closely peg graft inside the second connector, thereby guarantee that power connectivity prevents the pine and takes off, rotate the loose ring after connecting, make the loose ring remove downwards, then rotate to the second connector outside through the screw thread, thereby fixed second connector position, and the annular gasbag is extruded to the loose ring inside wall, make the annular gasbag remove downwards, connect and accomplish the back, this moment the annular gasbag is located position between first connector and the second connector, thereby seal the crack position, prevent that the water source from getting into to cause the hookup location to damage.

Preferably, the anti-climbing motor mechanism comprises a rotary disc, a second sliding groove, a sliding block, a second spring, a conductive wire, a third sliding groove, a perforation, a grounding rod, a sliding rod, a third spring, a winding shaft, a rotary shaft and a torsional spring, wherein the winding shaft is movably clamped in the second shell, the rotary disc is fixedly arranged on one side of the winding shaft, the rotary shaft is fixedly arranged on one side of the rotary disc, the rotary shaft is movably clamped on the inner side wall of the second shell, the torsional spring is fixedly arranged on the outer side of the rotary shaft, the outer side of the torsional spring is fixed on the inner side wall of the second shell, the torsional spring is in a mosquito-repellent incense shape, the second sliding groove is formed in one side of the second shell, the sliding block is movably clamped in the second sliding groove, the second spring is fixedly arranged between the sliding block and the inner side wall of the second sliding groove, the sliding block is a conductor, the sliding block is tightly attached to the outer side of the rotary disc, and the elastic force of the second spring ensures that the sliding block can be tightly attached to the outer side of the rotary disc when the anti-climbing motor mechanism is used for a long time, the sliding block is electrically connected with the copper sheet, a conductive wire is fixedly wound on the outer side of the winding shaft, a through hole is formed in the bottom end of the second shell, a third sliding groove is formed in the bottom end of the second shell, a sliding rod is movably clamped and arranged in the third sliding groove, a third spring is fixedly arranged between one side of the sliding rod and the inner side wall of the third sliding groove, the sliding rod movably extends into the through hole, the conductive wire movably penetrates through the through hole, a grounding rod is fixedly arranged at the bottom end of the conductive wire, the conductive wire is electrically connected with the rotary table, the grounding rod is pulled when the electric wire is used, the conductive wire is pulled out until the grounding rod is contacted with the ground, the elastic force of the third spring presses the conductive wire through the sliding rod, so that the conductive wire is tightly attached to the inner side wall of the through hole, the position of the conductive wire is fixed, and when the conductive wire is pulled out, the winding shaft is driven to rotate and the rotary table is driven to rotate, so drive the torsional spring through the pivot and rotate for the torsional spring is turned round tightly, makes grounding rod and copper sheet electric connection through carousel, slider moreover, and when taking place creepage phenomenon, the electric current that produces this moment passes through the copper sheet guide, later conducts to ground position through slider, carousel, conductor wire and grounding rod, prevents that the electric current that produces from damaging first casing surface, guarantees the insulating nature of first casing, prolongs whole current transformer's life.

Preferably, the resistance detection mechanism comprises a first ammeter, a storage battery, a second ammeter, a second cavity, a first insulating rod, a second insulating rod, a third insulating rod, a fifth spring, a limiting block, an electromagnet and a magnetic metal block, wherein the first ammeter and the second ammeter are fixed inside a third shell, the first ammeter and the second ammeter have the same structure, the storage battery is fixedly arranged at the top end inside the third shell, the storage battery is a lithium battery and is electrically connected with the wireless transmitter, the bottom end inside the third shell is provided with the second cavity, the limiting blocks are fixedly arranged at two sides inside the second cavity, the electromagnet is fixedly arranged at the bottom end inside the second cavity, the first insulating rod is movably clamped inside the second cavity, the fifth spring is fixedly arranged between the bottom end of the first insulating rod and the bottom end inside the second cavity, the bottom end of the first insulating rod is fixedly provided with a magnetic metal block, the top end of the first insulating rod is fixedly provided with a second insulating rod, the top end of the second insulating rod is fixedly provided with a third insulating rod, the first insulating rod and the inside of the second insulating rod are fixedly embedded with a conductive wire, a power line is wound outside an iron core and penetrates into a third shell to be electrically connected with the first ammeter and the second ammeter, an open circuit is formed at the position of the second cavity, the first insulating rod enables the first ammeter to be in a communicated state when the power line is normally used, the second circuit board is in an open circuit state, and the first ammeter is enabled to rotate by current generated by electromagnetism and a measurement value is displayed.

Preferably, the first ammeter comprises a binding post, a first contact, a second contact and a pointer, the pointer is movably arranged in the first ammeter, the binding posts are fixedly arranged on two sides of the first ammeter, the first contact is fixedly embedded in the first ammeter, the second contact is fixedly arranged on the rear side of the pointer, the first contact and the second contact are electrically connected with the electromagnet, when the line resistance of the first ammeter is increased, the current on the line is reduced at the moment, the accuracy of the detection result is affected, the pointer of the first ammeter is rotated to a position with a smaller numerical value, so that the second contact is in contact with the first contact on one side, the electromagnet is started, the electromagnet adsorbs the magnetic metal block to move downwards, the first insulating rod is driven to move downwards, the fifth spring is extruded, and the first insulating rod drives the third insulating rod to move downwards through the second insulating rod, make inside the second ampere meter is connected to the circuit, and first ampere meter is in the state of opening a circuit, make the circuit be in normal condition, diminish as circuit resistance, the circuit probably short circuit this moment, the testing result is inaccurate, the same reason pointer rotates to great numerical value position, make first contact and second contact, so still can make second ampere meter access circuit use, guarantee current transformer's normal use, and wireless transmitting module is with signal transmission to control terminal simultaneously, the suggestion personnel maintain and handle.

Preferably, the extrusion mechanism comprises a first fixing plate, a second fixing plate, a fixing rod, a loop bar, a fourth spring and a baffle, the first fixing plate is fixedly arranged on the inner side wall of the first shell, the second fixing plate is fixedly arranged on one side of the first fixing plate, the iron core is arranged at the top end of the fixing plate, the fixing rod is fixedly arranged on one side of the first fixing plate, the loop bar is movably sleeved on the outer side of the fixing rod, the fourth spring is fixedly arranged between the fixing rod and the inner side wall of the loop bar, the baffle is fixedly arranged on one side of the loop bar, the loop bar is stretched when the extrusion mechanism is used, the iron core is arranged at the top end of the second fixing plate, the loop bar is loosened, the fourth spring is reset at the moment, the baffle is tightly attached to the outer side of the iron core, and the fourth box body is elastically extruded, so that the iron core is tightly attached to ensure the attaching degree of the iron core when the extrusion mechanism is used for a long time, the service life of the current transformer is prolonged.

Preferably, the sealing mechanism comprises a clamping groove, a rubber sleeve, a clamping plate, a first cavity, a hollow block, a screw rod and a piston plate, the clamping groove is formed in one side of the first shell, the clamping plate is fixedly arranged on one side of the cover plate and is matched with the clamping groove, the rubber sleeve is fixedly sleeved on one side of the clamping plate, the first cavity is formed in the cover plate, the piston plate is movably clamped in the first cavity, the first cavity is communicated with the inside of the rubber sleeve, the hollow block is fixedly arranged on one side of the cover plate, the screw rod is inserted in the hollow block through threads, one side of the screw rod is movably clamped on one side of the piston plate, the cover plate covers the first shell when in use, the clamping plate is clamped in the clamping groove, then a user rotates the screw rod, the screw rod drives the piston plate to move along the inside of the first cavity, and air in the air is extruded to the inside of the rubber sleeve, make the rubber sleeve inflation, so make cardboard and draw-in groove interference be connected, prevent that the apron from breaking away from first casing to through expanded rubber sleeve sealing connection position, thereby prevent that external environment from causing the influence to first casing inside spare part.

Preferably, the wireless transmitting module is wirelessly connected with the control terminal.

Preferably, the insertion block is matched with the second connector.

Preferably, the annular air bag is positioned inside the movable ring.

Compared with the prior art, the invention has the beneficial effects that:

1. when the resistance of the first ammeter line is increased, the current on the line is reduced at the moment, the accuracy of the detection result is influenced, the pointer of the first ammeter rotates to a position with a smaller value, the second contact is in contact with the first contact on one side, the electromagnet is started, adsorbs the magnetic metal block and moves downwards, so that the first insulating rod is driven to move downwards to extrude the fifth spring, the first insulating rod drives the third insulating rod to move downwards through the second insulating rod, so that the second ammeter is connected into the circuit, the first ammeter is in an open circuit state, the circuit is in a normal state, when the resistance of the circuit is reduced, the circuit is possibly short-circuited, the detection result is inaccurate, similarly, the pointer rotates to a position with a larger value, so that the first ammeter is in contact with the second contact, the second ammeter is connected into the circuit for use, and the normal use of the current transformer is ensured, meanwhile, the wireless transmitting module transmits the signal to the control terminal to prompt personnel to carry out maintenance treatment;

2. when the air bag type water heater is used, the first connector and the second connector are connected, the inserting block is inserted into the second connector and extrudes the first spring, the first spring enables the inserting block to be tightly inserted into the second connector, so that the power supply connectivity is guaranteed and the loosening is prevented, the movable ring is rotated after the connection to enable the movable ring to move downwards and then to rotate to the outer side of the second connector through threads, so that the position of the second connector is fixed, the annular air bag is extruded by the inner side wall of the movable ring to enable the annular air bag to move downwards, and after the connection is completed, the annular air bag is located between the first connector and the second connector at the moment, so that the gap position is sealed, and the damage to the connection position caused by the water source entering is prevented;

3. according to the invention, the grounding rod is pulled to pull out the conductive wire until the grounding rod is in contact with the ground, at the moment, the third spring elasticity extrudes the conductive wire through the sliding rod, so that the conductive wire is tightly attached to the inner side wall of the through hole, the position of the conductive wire is fixed, and when the conductive wire is pulled out, the winding shaft is driven to rotate and the turntable is driven to rotate;

4. when the current transformer is used, the sleeve rod is stretched to enable the fourth spring to be stretched, then the iron core is arranged at the top end of the second fixing plate, then the sleeve rod is loosened, the fourth spring is reset, the baffle is attached to the outer side of the iron core, the fourth box body is extruded by elasticity, the iron core is attached tightly, the attachment degree of the iron core is guaranteed when the current transformer is used for a long time, and the service life of the current transformer is prolonged;

5. when the rubber sleeve sealing cover is used, the cover plate covers the first shell, the clamping plate is clamped in the clamping groove, then a user rotates the screw rod, the screw rod drives the piston plate to move along the inside of the first cavity, air in the air is extruded into the rubber sleeve, the rubber sleeve is expanded, the clamping plate is in interference connection with the clamping groove, the cover plate is prevented from being separated from the first shell, and the expanded rubber sleeve seals the connection position, so that the influence of the external environment on parts in the first shell is prevented.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a current transformer according to the present invention;

FIG. 2 is a cross-sectional view of the current transformer of the present invention;

FIG. 3 is a top sectional view of a first housing of the current transformer of the present invention;

FIG. 4 is a schematic structural diagram of a first ammeter in the current transformer of the present invention;

FIG. 5 is a sectional view of a second connection head of the current transformer of the present invention;

FIG. 6 is an enlarged schematic view of A1 shown in FIG. 2 of the current transformer according to the present invention;

FIG. 7 is an enlarged schematic view of A2 in FIG. 2 of the current transformer according to the present invention;

fig. 8 is a left side sectional view of a second case of the current transformer of the present invention.

In the figure: 1. a first housing; 2. a first connector; 3. a second connector; 4. a second housing; 5. a third housing; 6. a wireless transmitting module; 7. an iron core; 8. a copper sheet; 9. a second chute; 10. a second spring; 11. a slider; 12. a turntable; 13. a winding shaft; 14. perforating; 15. a ground rod; 16. a conductive line; 17. a third spring; 18. a slide bar; 19. a third chute; 20. a rotating shaft; 21. a torsion spring; 22. a cover plate; 23. a card slot; 24. clamping a plate; 25. a rubber sleeve; 26. a first cavity; 27. a hollow block; 28. a screw; 29. a piston plate; 30. a storage battery; 31. a first ammeter; 32. a second ammeter; 33. a first fixing plate; 34. a second fixing plate; 35. a fixing rod; 36. a loop bar; 37. a baffle plate; 38. a fourth spring; 39. a pointer; 40. a first contact; 41. a second contact; 42. a binding post; 43. a third insulating rod; 44. a second insulating rod; 45. a first insulating rod; 46. a limiting block; 47. an electromagnet; 48. a fifth spring; 49. a magnetic metal block; 50. a second cavity; 51. a movable ring; 52. an annular air bag; 53. a first chute; 54. inserting a block; 55. a first spring; 56. and (4) an extrusion mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, the present invention provides a technical solution: the current transformer comprises a first shell 1, a first connector 2, a second connector 3 and an iron core 7, wherein a second shell 4 is fixedly arranged on one side of the first shell 1, a creepage preventing mechanism is arranged in the second shell 4, a third shell 5 is fixedly arranged on one side of the first shell 1, a resistance detecting mechanism is arranged in the third shell 5, a wireless transmitting module 6 is fixedly arranged at the top end of the third shell 5, the wireless transmitting module 6 is wirelessly connected with a control terminal, a copper sheet 8 is fixedly arranged at the top end of the first shell 1, a first chute 53 is arranged in the first connector 2, an inserting block 54 is movably clamped in the first chute 53, the inserting block 54 is engaged with the second connector 3, a first spring 55 is fixedly arranged between the inserting block 54 and the inner side wall of the first chute 53, a movable ring 51 is sleeved on the outer side of the first connector 2 through threads, the outer side of the first connector 2 is fixedly provided with an annular air bag 52, the annular air bag 52 is positioned inside the movable ring 51, the inside of the first shell 1 is provided with an extrusion mechanism 56, one side of the first shell 1 is provided with a cover plate 22, the inside of the cover plate 22 is provided with a sealing mechanism, the first connector 2 and the second connector 3 are connected when in use, the insertion block 54 is inserted into the second connector 3, the insertion block 54 extrudes the first spring 55, the first spring 55 enables the insertion block 54 to be tightly inserted into the second connector 3, so that the power supply connectivity is ensured and the loosening is prevented, the movable ring 51 is rotated after the connection, the movable ring 51 moves downwards, then the movable ring is rotated to the outer side of the second connector 3 through threads, so that the position of the second connector 3 is fixed, the inner side wall of the movable ring 51 extrudes the annular air bag 52, so that the annular air bag 52 moves downwards, and after the connection is completed, the annular air bag 52 is located between the first connector 2 and the second connector 3, so as to seal the gap position and prevent the water source from entering and damaging the connection position.

The anti-climbing mechanism comprises a rotary disc 12, a second sliding groove 9, a sliding block 11, a second spring 10, a conductive wire 16, a third sliding groove 19, a perforation 14, a grounding rod 15, a sliding rod 18, a third spring 17, a winding shaft 13, a rotating shaft 20 and a torsion spring 21, wherein the winding shaft 13 is movably clamped inside the second shell 4, the rotary disc 12 is fixedly arranged on one side of the winding shaft 13, the rotating shaft 20 is fixedly arranged on one side of the rotary disc 12, the rotating shaft 20 is movably clamped on the inner side wall of the second shell 4, the torsion spring 21 is fixedly arranged outside the rotating shaft 20, the outer side of the torsion spring 21 is fixed on the inner side wall of the second shell 4, the torsion spring 21 is in a mosquito-repellent incense shape, the second sliding groove 9 is arranged on one side of the second shell 4, the sliding block 11 is movably clamped inside the second sliding groove 9, the second spring 10 is fixedly arranged between the sliding block 11 and the inner side wall of the second sliding groove 9, the sliding block 11 is a conductor, the sliding block 11 is tightly attached to the outer side of the rotating disc 12, the elastic force of the second spring 10 ensures that the sliding block 11 can be tightly attached to the outer side of the rotating disc 12 when the sliding block 11 is used for a long time, the sliding block 11 is electrically connected with the copper sheet 8, the outer side of the winding shaft 13 is fixedly wound with the conductive wire 16, the bottom end of the second shell 4 is provided with the through hole 14, the bottom end of the second shell 4 is provided with the third sliding groove 19, the sliding rod 18 is movably clamped and connected in the third sliding groove 19, the third spring 17 is fixedly arranged between one side of the sliding rod 18 and the inner side wall of the third sliding groove 19, the sliding rod 18 movably extends into the through hole 14, the conductive wire 16 movably penetrates through the through hole 14, the bottom end of the conductive wire 16 is fixedly provided with the grounding rod 15, the conductive wire 16 is electrically connected with the rotating disc 12, the grounding rod 15 is pulled when the sliding block is used, so that the conductive wire 16 is pulled out until the grounding rod 15 is contacted with the ground, third spring 17 elasticity passes through slide bar 18 extrusion conductor wire 16 this moment, make conductor wire 16 hug closely on perforation 14 inside wall, thereby fixed conductor wire 16 position, and when conductor wire 16 was pulled out, drive winding shaft 13 and rotate, and drive carousel 12 and rotate, so drive torsional spring 21 through pivot 20 and rotate, make torsional spring 21 by the turn-ups, and through carousel 12, slider 11 makes earthed bar 15 and copper sheet 8 electric connection, when the creepage phenomenon takes place, the electric current that produces this moment passes through the guide of copper sheet 8, later through slider 11, carousel 12, conductor wire 16 and earthed bar 15 conduct to ground position, prevent that the electric current that produces from damaging first casing 1 surface, guarantee the insulating nature of first casing 1, prolong whole current transformer's life.

The resistance detection mechanism comprises a first ammeter 31, a storage battery 30, a second ammeter 32, a second cavity 50, a first insulating rod 45, a second insulating rod 44, a third insulating rod 43, a fifth spring 48, a limiting block 46, an electromagnet 47 and a magnetic metal block 49, wherein the first ammeter 31 and the second ammeter 32 are both fixed inside a third shell 5, the first ammeter 31 and the second ammeter 32 have the same structure, the storage battery 30 is fixedly arranged at the top end inside the third shell 5, the storage battery 30 is a lithium battery, the storage battery 30 is electrically connected with a wireless transmitter 6, the second cavity 50 is arranged at the bottom end inside the third shell 5, the limiting blocks 46 are fixedly arranged at two sides inside the second cavity 50, the electromagnet 47 is fixedly arranged at the bottom end inside the second cavity 50, the first insulating rod 45 is movably clamped inside the second cavity 50, a fifth spring 48 is fixedly arranged between the bottom end of the first insulating rod 45 and the bottom end inside the second cavity 50, a magnetic metal block 49 is fixedly arranged at the bottom end of the first insulating rod 45, a second insulating rod 44 is fixedly arranged at the top end of the first insulating rod 45, a third insulating rod 43 is fixedly arranged at the top end of the second insulating rod 44, a conducting wire is fixedly embedded inside the first insulating rod 45 and the second insulating rod 44, the power wire is wound outside the iron core 7 and then penetrates into the third shell 5 to be electrically connected with the first ammeter 31 and the second ammeter 32, an open circuit is formed at the position of the second cavity 50, the first insulating rod 45 enables the first ammeter 31 to be in a connected state and the second circuit board 32 to be in an open circuit state during normal use, the first ammeter 31 is rotated by the electromagnetically generated current, and a measured value is displayed.

The first ammeter 31 comprises a terminal 42, a first contact 40, a second contact 41 and a pointer 39, the pointer 39 is movably arranged in the first ammeter 31, the terminals 42 are fixedly arranged on two sides of the first ammeter 31, the first contact 40 is fixedly embedded in the first ammeter 31, the second contact 41 is fixedly arranged on the rear side of the pointer 39, the first contact 40 and the second contact 41 are both electrically connected with an electromagnet 47, when the line resistance of the first ammeter 31 is increased, the current on the line is reduced at the moment, the accuracy of the detection result is affected, the pointer 39 of the first ammeter 31 rotates to a position with a smaller value, so that the second contact 41 is in contact with the first contact 40 on one side, the electromagnet 47 is started, the electromagnet 47 adsorbs a magnetic metal block 49 to move downwards, thereby driving the first insulating rod 45 to move downwards, pressing a fifth spring 48, and the first insulating rod 45 drives a third insulating rod 43 to move downwards through a second insulating rod 44, make second ampere meter 32 be connected to inside the circuit, and first ampere meter 31 is in the state of opening a circuit, make the circuit be in normal condition, it diminishes to become as circuit resistance, the circuit is probably short-circuited this moment, the testing result is inaccurate, the same reason pointer 39 rotates to great numerical value position, make first contact 40 and second contact 41 contact, so still can make second ampere meter 32 access circuit use, guarantee current transformer's normal use, and wireless transmitting module 6 is with signal transmission to control terminal simultaneously, the suggestion personnel carry out maintenance and treatment.

The pressing mechanism 56 comprises a first fixing plate 33, a second fixing plate 34, a fixing rod 35, a loop bar 36, a fourth spring 38 and a baffle 37, the first fixing plate 33 is fixedly arranged on the inner side wall of the first shell 1, the second fixing plate 34 is fixedly arranged on one side of the first fixing plate 33, the iron core 7 is arranged at the top end of the fixing plate 34, the fixing rod 35 is fixedly arranged on one side of the first fixing plate 33, the loop bar 36 is movably sleeved on the outer side of the fixing rod 35, the fourth spring 38 is fixedly arranged between the fixing rod 35 and the inner side wall of the loop bar 36, the baffle 37 is fixedly arranged on one side of the loop bar 36, the loop bar 36 is stretched when in use to stretch the fourth spring 38, then the iron core 7 is arranged at the top end of the second fixing plate 34, then the loop bar 36 is loosened, at this time, the fourth spring 38 is reset to enable the baffle 37 to cling to the outer side of the iron core 7, and the fourth box body 38 is elastically pressed, the iron core 7 is tightly attached, the attaching degree of the iron core 7 in long-time use is guaranteed, and the service life of the current transformer is prolonged.

The sealing mechanism comprises a clamping groove 23, a rubber sleeve 25, a clamping plate 24, a first cavity 26, a hollow block 27, a screw 28 and a piston plate 29, wherein the clamping groove 23 is formed in one side of the first shell 1, the clamping plate 24 is fixedly arranged on one side of the cover plate 22, the clamping plate 24 is matched with the clamping groove 23, the rubber sleeve 25 is fixedly sleeved on one side of the clamping plate 24, the first cavity 26 is formed in the cover plate 22, the piston plate 29 is movably clamped in the first cavity 26, the first cavity 26 is communicated with the rubber sleeve 25, the hollow block 27 is fixedly arranged on one side of the cover plate 22, the screw 28 is arranged in the hollow block 27 in a penetrating manner through threads, one side of the screw 28 is movably clamped on one side of the piston plate 29, the cover plate 22 is covered on the first shell 1 when the sealing mechanism is used, the clamping plate 24 is clamped in the clamping groove 23, and then the screw 28 is rotated by a user, the screw 28 drives the piston plate 29 to move along the inside of the first cavity 26, and the air inside the air 26 is extruded into the rubber sleeve 25, so that the rubber sleeve 25 expands, the clamping plate 24 is in interference connection with the clamping groove 23, the cover plate 22 is prevented from being separated from the first casing 1, and the expanded rubber sleeve 25 is used for sealing the connection position, so that the external environment is prevented from influencing the parts inside the first casing 1.

The working principle is as follows: when the line resistance of the first ammeter 31 becomes larger, the current on the line is reduced at this time, which affects the accuracy of the detection result, the pointer 39 of the first ammeter 31 rotates to a position with a smaller value, so that the second contact 41 contacts with the first contact 40 on one side, the electromagnet 47 is started, the electromagnet 47 adsorbs the magnetic metal block 49 to move downwards, so as to drive the first insulating rod 45 to move downwards, so as to extrude the fifth spring 48, and the first insulating rod 45 drives the third insulating rod 43 to move downwards through the second insulating rod 44, so that the second ammeter 32 is connected to the inside of the circuit, and the first ammeter 31 is in an open circuit state, so that the circuit is in a normal state, when the circuit resistance becomes smaller, the circuit may be short-circuited, the detection result is inaccurate, and similarly, the pointer 39 rotates to a position with a larger value, so that the first contact 40 contacts with the second contact 41, so as to make the second ammeter 32 connected to the circuit for use, the normal use of the current transformer is ensured, and meanwhile, the wireless transmitting module 6 transmits a signal to the control terminal to prompt personnel to carry out maintenance treatment;

when the water source connecting device is used, the first connector 2 and the second connector 3 are connected, the inserting block 54 is inserted into the second connector 3, the inserting block 54 extrudes the first spring 55, the first spring 55 enables the inserting block 54 to be tightly inserted into the second connector 3, the power source connectivity is guaranteed, the loosening is prevented, the movable ring 51 is rotated after the connection, the movable ring 51 moves downwards and rotates to the outer side of the second connector 3 through threads, the position of the second connector 3 is fixed, the annular air bag 52 is extruded by the inner side wall of the movable ring 51, the annular air bag 52 moves downwards, and after the connection is completed, the annular air bag 52 is located between the first connector 2 and the second connector 3 at the moment, the gap position is sealed, and the water source is prevented from entering to cause damage to the connection position;

when the grounding rod 15 is pulled in use, the conductive wire 16 is pulled out until the grounding rod 15 contacts the ground, at the moment, the third spring 17 presses the conductive wire 16 through the sliding rod 18, so that the conductive wire 16 is tightly attached to the inner side wall of the through hole 14, thereby fixing the position of the conductive wire 16, and when the conductive wire 16 is pulled out, the winding shaft 13 is driven to rotate, and drives the rotating disc 12 to rotate, thus driving the torsion spring 21 to rotate through the rotating shaft 20, so that the torsion spring 21 is twisted tightly, and the grounding rod 15 is electrically connected with the copper sheet 8 through the rotary disc 12 and the slide block 11, when a creepage phenomenon occurs, the current generated at the moment is guided through the copper sheet 8 and then is conducted to the ground position through the sliding block 11, the rotating disc 12, the conducting wire 16 and the grounding rod 15, so that the generated current is prevented from damaging the outer surface of the first shell 1, the insulativity of the first shell 1 is ensured, and the service life of the whole current transformer is prolonged;

when the current transformer is used, the sleeve rod 36 is stretched to stretch the fourth spring 38, then the iron core 7 is arranged at the top end of the second fixing plate 34, then the sleeve rod 36 is loosened, at the moment, the fourth spring 38 is reset to enable the baffle 37 to be tightly attached to the outer side of the iron core 7, and the fourth box body 38 is elastically extruded to enable the iron core 7 to be tightly attached, so that the attaching degree of the iron core 7 during long-time use is ensured, and the service life of the current transformer is prolonged;

cover apron 22 on first casing 1 when using, make cardboard 24 joint inside draw-in groove 23 simultaneously, then the user rotates screw rod 28, screw rod 28 drives piston plate 29 and removes along first cavity 26 is inside, extrude the inside air of air 26 inside to rubber sleeve 25, make rubber sleeve 25 inflation, so make cardboard 24 and draw-in groove 23 interference connection, prevent to lap 22 and break away from first casing 1, and through the rubber sleeve 25 sealing connection position of inflation, thereby prevent that external environment from causing the influence to the inside spare part of first casing 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Current transformer, including first casing (1), first connector (2), second connector (3) and unshakable in one's determination (7), its characterized in that: a second shell (4) is fixedly arranged on one side of the first shell (1), a creepage preventing mechanism is arranged in the second shell (4), a third shell (5) is fixedly arranged on one side of the first shell (1), a resistance detection mechanism is arranged in the third shell (5), a wireless transmitting module (6) is fixedly arranged at the top end of the third shell (5), a copper sheet (8) is fixedly arranged at the top end of the first shell (1), a first sliding groove (53) is formed in the first connector (2), an inserting block (54) is movably clamped in the first sliding groove (53), a first spring (55) is fixedly arranged between the inserting block (54) and the inner side wall of the first sliding groove (53), a movable ring (51) is sleeved on the outer side of the first connector (2) through threads, and an annular air bag (52) is fixedly arranged on the outer side of the first connector (2), the extrusion mechanism (56) is arranged inside the first shell (1), the cover plate (22) is arranged on one side of the first shell (1), and the sealing mechanism is arranged inside the cover plate (22).

2. The current transformer of claim 1, wherein: the anti-creeping mechanism comprises a rotary disc (12), a second sliding groove (9), a sliding block (11), a second spring (10), a conductive wire (16), a third sliding groove (19), a perforation (14), a grounding rod (15), a sliding rod (18), a third spring (17), a winding shaft (13), a rotating shaft (20) and a torsion spring (21), wherein the winding shaft (13) is movably clamped inside the second shell (4), the rotary disc (12) is fixedly arranged on one side of the winding shaft (13), the rotating shaft (20) is fixedly arranged on one side of the rotary disc (12), the rotating shaft (20) is movably clamped on the inner side wall of the second shell (4), the torsion spring (21) is fixedly arranged on the outer side of the rotating shaft (20), the outer side of the torsion spring (21) is fixed on the inner side wall of the second shell (4), the torsion spring (21) is in a mosquito-repellent incense shape, the second sliding groove (9) is formed on one side of the second shell (4), a sliding block (11) is movably clamped inside the second sliding groove (9), a second spring (10) is fixedly arranged between the sliding block (11) and the inner side wall of the second sliding groove (9), the sliding block (11) is a conductor, the sliding block (11) is tightly attached to the outer side of the rotary table (12), the sliding block (11) is electrically connected with the copper sheet (8), a conductive wire (16) is fixedly wound outside the winding shaft (13), a through hole (14) is formed in the bottom end of the second shell (4), a third sliding groove (19) is formed in the bottom end of the second shell (4), a sliding rod (18) is movably clamped inside the third sliding groove (19), a third spring (17) is fixedly arranged between one side of the sliding rod (18) and the inner side wall of the third sliding groove (19), the sliding rod (18) movably extends into the through hole (14), and the conductive wire (16) movably penetrates through the through hole (14), the bottom end of the conductive wire (16) is fixedly provided with a grounding rod (15), and the conductive wire (16) is electrically connected with the turntable (12).

3. The current transformer of claim 2, wherein: the resistance detection mechanism comprises a first ammeter (31), a storage battery (30), a second ammeter (32), a second cavity (50), a first insulating rod (45), a second insulating rod (44), a third insulating rod (43), a fifth spring (48), a limiting block (46), an electromagnet (47) and a magnetic metal block (49), wherein the first ammeter (31) and the second ammeter (32) are fixed inside a third shell (5), the first ammeter (31) and the second ammeter (32) are of the same structure, the storage battery (30) is fixedly arranged at the top end inside the third shell (5), the storage battery (30) is a lithium battery, the storage battery (30) is electrically connected with the wireless transmitter (6), the second cavity (50) is formed in the bottom end inside the third shell (5), the limiting blocks (46) are fixedly arranged on two sides inside the second cavity (50), the utility model discloses a safety protection device, including first cavity (50), second cavity (50), first insulating rod (45), fifth spring (48) are fixed to be provided with between inside bottom of second cavity (50) the inside activity joint of second cavity (50), first insulating rod (45) bottom is provided with magnetic metal piece (49), first insulating rod (45) top is fixed and is provided with second insulating rod (44), second insulating rod (44) top is fixed and is provided with third insulating rod (43), first insulating rod (45) and second insulating rod (44) inside are inlayed fixedly and are provided with the conductor wire.

4. The current transformer of claim 3, wherein: first ampere meter (31) are including terminal (42), first contact (40), second contact (41) and pointer (39), the inside activity of first ampere meter (31) is provided with pointer (39), fixed terminal (42) that is provided with in first ampere meter (31) both sides, fixed first contact (40) that is provided with are inlayed to first ampere meter (31) inside, fixed second contact (41) that is provided with in pointer (39) rear side, first contact (40), second contact (41) all with electro-magnet (47) electric connection.

5. The current transformer of claim 4, wherein: extrusion mechanism (56) includes first fixed plate (33), second fixed plate (34), dead lever (35), loop bar (36), fourth spring (38) and baffle (37), fixed first fixed plate (33) that is provided with on first casing (1) inside wall, first fixed plate (33) one side is fixed and is provided with second fixed plate (34), iron core (7) are settled on fixed plate (34) top, fixed dead lever (35) that is provided with in first fixed plate (33) one side, dead lever (35) outside activity cup joints and is provided with loop bar (36), fixed fourth spring (38) that is provided with between dead lever (35) and loop bar (36) inside wall, loop bar (36) one side is fixed and is provided with baffle (3) (7).

6. The current transformer of claim 5, wherein: the sealing mechanism comprises a clamping groove (23), a rubber sleeve (25), a clamping plate (24), a first cavity (26), a hollow block (27), a screw rod (28) and a piston plate (29), a clamping groove (23) is formed in one side of the first shell (1), a clamping plate (24) is fixedly arranged on one side of the cover plate (22), the clamping plate (24) is matched with the clamping groove (23), one side of the clamping plate (24) is fixedly sleeved with a rubber sleeve (25), a first cavity (26) is formed in the cover plate (22), a piston plate (29) is movably clamped and arranged in the first cavity (26), the first cavity (26) is communicated with the interior of the rubber sleeve (25), a hollow block (27) is fixedly arranged on one side of the cover plate (22), the hollow block (27) is internally provided with a screw rod (28) in a threaded penetrating manner, and one side of the screw rod (28) is movably clamped on one side of a piston plate (29).

7. The current transformer of claim 6, wherein: and the wireless transmitting module (6) is in wireless connection with the control terminal.

8. The current transformer of claim 7, wherein: the inserting block (54) is matched with the second connector (3).

9. The current transformer of claim 8, wherein: the annular air bag (52) is positioned inside the movable ring (51).