CN220138106U

CN220138106U - Current transformer for medium-voltage outgoing line connection of power system

Info

Publication number: CN220138106U
Application number: CN202321556416.2U
Authority: CN
Inventors: 石荣光; 刘超
Original assignee: Shandong Junhe Municipal Construction Group Co ltd
Current assignee: Shandong Junhe Municipal Construction Group Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-05
Anticipated expiration: 2033-06-19

Abstract

The utility model relates to the technical field of current transformers, and discloses a current transformer for medium-voltage outgoing line connection in an electric power system. According to the utility model, the iron clamping block is separated from the inside of the installation frame through the handle and the pull rod, and simultaneously, the iron clamping block and the positioning magnetic block are magnetically adsorbed together, so that a worker can conveniently take out the current transformer from the inside of the positioning cover, overhaul the current transformer, and when the current transformer is installed, the worker can move the iron clamping block to the inner cavity of the installation frame through the handle and the pull rod, and simultaneously, the iron clamping block is positioned by utilizing the elasticity of the reset spring, so that the current transformer is quickly installed, and the efficiency of overhaul or replacement of the current transformer is improved.

Description

Current transformer for medium-voltage outgoing line connection of power system

Technical Field

The utility model relates to the technical field of current transformers, in particular to a current transformer for medium-voltage outgoing line connection in an electric power system.

Background

The power system is a unified whole formed by secondary facilities such as power generation, power supply (power transmission, power transformation and power distribution), power utilization facilities, regulation control, relay protection and safety automatic devices, metering devices, dispatching automation, power communication and the like which are required for guaranteeing the normal operation of the power system. The medium-voltage outgoing line of the power system is mainly used for electrical links such as a transformer substation and a ring main unit which play a role in distributing electric energy, and a current transformer is usually required to be used when the medium-voltage outgoing line is connected, and the current transformer is an instrument for converting primary side large current into secondary side small current for measurement according to an electromagnetic induction principle. The current transformer consists of a closed iron core and windings. Its primary winding turns are very few and are strung in the line of the current to be measured. Therefore, the secondary side winding turns are relatively large, and the secondary side loop is always closed when the current transformer works, so that the impedance of the series coil of the measuring instrument and the protection loop is very small, and the working state of the current transformer is close to a short circuit. The current transformer is used for converting primary side large current into secondary side small current for measurement, and the secondary side cannot be opened.

When the current transformer is used, the current transformer shell is fixedly connected with the fixed support at the bottom, a threaded mounting hole is formed in the fixed support, the fixed support of the current transformer is fixedly mounted on the metal framework through bolts, if the current transformer is damaged when being used for a long time, the current transformer needs to be overhauled or replaced by manually using a tool to remove the bolts, the current transformer can be detached, after the overhauling or replacement, the bolts are used for fixing, so that the current transformer is more troublesome to disassemble and assemble, the time of the workers is wasted, and the overhauling efficiency of the current transformer is further affected.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a current transformer for connecting a voltage outgoing line in a power system, which solves the problems in the prior art.

The utility model provides the following technical scheme: the utility model provides a press current transformer for line connection in electric power system, includes the current transformer body, the inside of current transformer body is equipped with closed iron core, closed iron core's outer wall is equipped with the winding, the both sides of current transformer body openly below are equipped with binding post, the below of current transformer body is equipped with dismouting mechanism, the front of current transformer body is equipped with cable positioning mechanism.

The disassembly and assembly mechanism comprises a positioning cover, the bottom activity of current transformer body is pegged graft at the inner chamber at positioning cover top, the pull rod has been cup jointed in the both sides activity of positioning cover, the one end fixedly connected with handle of pull rod, the bottom fixedly connected with installing frame of current transformer body both sides, the installing frame overlap joint is in the inside of positioning cover, the inside activity joint of installing frame one side has the iron fixture block, the other end of pull rod extends to the inside of installing frame and fixedly connected with in the middle part of iron fixture block one side.

The cable positioning mechanism comprises two arc clamping plates, wherein the two arc clamping plates are positioned on two sides of the front face of the current transformer body, the two arc clamping plates are fixedly connected with rubber anti-skid pads on the inner walls of the arc clamping plates, and the screw rods are rotatably connected to the middle parts of one side of the arc clamping plates.

Further, the both sides fixedly connected with hollow reset lever of locating cover inner chamber, the one end fixedly connected with location magnetic path of hollow reset lever outer wall, the one end activity of hollow reset lever has cup jointed the movable rod, the one end fixed connection of movable rod is in one side of iron fixture block.

Further, the other end of the movable rod extends to the inner cavity of the hollow reset rod and is fixedly connected with a pressing plate, guide rods are symmetrically and movably sleeved on the upper side and the lower side of the inner portion of the pressing plate, and two ends of the guide rods are fixedly connected to two ends of the inner cavity of the hollow reset rod.

Further, the outer wall activity of guide bar has cup jointed reset spring, reset spring's one end fixed connection is in one side of clamp plate, reset spring's the other end fixed connection is in the one end of hollow reset lever inner chamber.

Further, the positive both sides fixedly connected with installation piece of current transformer body, the outer wall screw thread of screw rod cup joints in the inside of installation piece.

Further, one side of the installation block is hinged with a hinged connecting rod, and one end of the hinged connecting rod is hinged to one side of the arc-shaped clamping plate.

Further, the bottom fixedly connected with fixed bolster of locating cover, threaded mounting hole has been seted up to the bilateral symmetry at fixed bolster top.

The utility model has the technical effects and advantages that:

1. according to the utility model, the positioning cover, the handle, the pull rod, the iron clamping block, the mounting frame, the movable rod, the hollow reset rod, the positioning magnetic block, the pressing plate, the guide rod and the reset spring are matched, so that a worker can conveniently move the iron clamping block through the handle and the pull rod, the iron clamping block is separated from the mounting frame, and simultaneously the iron clamping block and the positioning magnetic block are magnetically adsorbed together, so that the worker can conveniently take out the current transformer from the positioning cover, overhaul the current transformer, and when the current transformer is mounted, the worker can move the iron clamping block to the inner cavity of the mounting frame through the handle and the pull rod, and meanwhile, the elasticity of the reset spring is utilized to position the iron clamping block, so that the current transformer is quickly mounted, and the overhaul or replacement efficiency of the current transformer is improved.

2. According to the utility model, the two arc clamping plates are convenient to horizontally move by matching the installation blocks, the screw rods, the arc clamping plates, the rubber anti-slip pad and the hinged connecting rod, so that the cable is convenient to clamp and fix, the stability of the cable after penetrating through the inside of the current transformer body is maintained, the cable is protected by the soft elasticity of the rubber anti-slip pad, and the condition that the outer wall of the cable is damaged due to overlarge clamping force of the two arc clamping plates is prevented.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is a schematic cross-sectional view of a body structure of the current transformer of the present utility model.

Fig. 3 is a schematic sectional view of a part of the dismounting mechanism and the fixing bracket of the utility model.

Fig. 4 is a schematic cross-sectional view of the hollow reset lever structure of the present utility model.

FIG. 5 is a schematic view of the structure of the arc clamping plate and the rubber anti-slip pad of the present utility model.

The reference numerals are: 1. a current transformer body; 2. a disassembly and assembly mechanism; 3. a fixed bracket; 31. a threaded mounting hole; 4. a cable positioning mechanism; 5. closing the iron core; 6. a winding; 7. a connection terminal; 21. a positioning cover; 22. a handle; 23. a pull rod; 24. an iron clamping block; 25. a mounting frame; 26. a movable rod; 27. a hollow reset rod; 28. positioning a magnetic block; 271. a pressing plate; 272. a guide rod; 273. a return spring; 41. a mounting block; 42. a screw; 43. an arc clamping plate; 44. a rubber anti-slip pad; 45. and (5) hinging the connecting rod.

Detailed Description

The embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the present utility model, and the configurations of the structures described in the following embodiments are merely examples, and the current transformer for connecting a power line in an electric power system according to the present utility model is not limited to the structures described in the following embodiments, and all other embodiments obtained by a person having ordinary skill in the art without making any creative effort are within the scope of the present utility model.

Embodiment one:

as shown in fig. 1-5, a current transformer for medium voltage outgoing line connection in an electric power system comprises a current transformer body 1, wherein a closed iron core 5 is arranged in the current transformer body 1, a winding 6 is arranged on the outer wall of the closed iron core 5, wiring terminals 7 are arranged on two sides below the front face of the current transformer body 1, a dismounting mechanism 2 is arranged below the current transformer body 1, the dismounting mechanism 2 comprises a positioning cover 21, the bottom of the current transformer body 1 is movably inserted into an inner cavity at the top of the positioning cover 21, two sides of the positioning cover 21 are movably sleeved with a pull rod 23, one end of the pull rod 23 is fixedly connected with a handle 22, the bottoms of two sides of the current transformer body 1 are fixedly connected with a mounting frame 25, the mounting frame 25 is lapped in the positioning cover 21, an iron clamping block 24 is movably clamped in the interior of one side of the mounting frame 25, the other end of the pull rod 23 extends to the interior of the mounting frame 25 and is fixedly connected with the middle of one side of the iron clamping block 24, the two sides of the inner cavity of the positioning cover 21 are fixedly connected with a hollow reset rod 27, one end of the outer wall of the hollow reset rod 27 is fixedly connected with a positioning magnetic block 28, one end of the hollow reset rod 27 is movably sleeved with a movable rod 26, one end of the movable rod 26 is fixedly connected with one side of an iron clamping block 24, the other end of the movable rod 26 extends to the inner cavity of the hollow reset rod 27 and is fixedly connected with a pressing plate 271, the upper side and the lower side of the inner part of the pressing plate 271 are symmetrically and movably sleeved with a guide rod 272, the two ends of the guide rod 272 are fixedly connected with the two ends of the inner cavity of the hollow reset rod 27, the outer wall of the guide rod 272 is movably sleeved with a reset spring 273, one end of the reset spring 273 is fixedly connected with one side of the pressing plate 271, the other end of the reset spring 273 is fixedly connected with one end of the inner cavity of the hollow reset rod 27, the bottom of the positioning cover 21 is fixedly connected with a fixing bracket 3, threaded mounting holes 31 are symmetrically formed in two sides of the top of the fixed support 3.

In this embodiment, through the cooperation of fixed bolster 3 and screw mounting hole 31, make things convenient for the staff to use the bolt with current transformer fixed mounting on the metal framework, the staff is through pulling handle 22 and pull rod 23, make pull rod 23 pulling iron fixture block 24 break away from the inside of installing frame 25, simultaneously iron fixture block 24 passes through movable rod 26 and drives clamp plate 271 at the outer wall horizontal migration of guide bar 272, clamp plate 271 and extrusion reset spring 273, make one end of reset spring 273 shrink, simultaneously iron fixture block 24 removes to one side of location magnetic path 28, the magnetic adsorption force when location magnetic path 28 and iron fixture block 24 contact is greater than reset spring 273's resilience, make magnetism adsorb together between iron fixture block 24 and the location magnetic path 28, but the staff upwards moves current transformer this moment, make current transformer take out from location cover 21 inside, make things convenient for dismantling the current transformer, overhaul or maintain.

Embodiment two:

as shown in fig. 1-5, the front of the current transformer body 1 is provided with a cable positioning mechanism 4, the cable positioning mechanism 4 comprises two arc clamping plates 43, the two arc clamping plates 43 are positioned on two sides of the front of the current transformer body 1, the inner walls of the two arc clamping plates 43 are fixedly connected with rubber anti-slip pads 44, the middle parts of one sides of the two arc clamping plates 43 are rotationally connected with screw rods 42, two sides of the front of the current transformer body 1 are fixedly connected with mounting blocks 41, the outer wall threads of the screw rods 42 are sleeved in the mounting blocks 41, one side of each mounting block 41 is hinged with a hinged connecting rod 45, and one end of each hinged connecting rod 45 is hinged on one side of each arc clamping plate 43.

In this embodiment, the cable is penetrated through the inside of the current transformer body 1, and then the two screws 42 are rotated, so that the screws 42 are spirally rotated in the inside of the mounting block 41, and meanwhile, one end of each screw 42 drives the arc clamping plate 43 and the member of the hinge connecting rod 45 to move, so that the cable is clamped and fixed in the inside between the two arc clamping plates 43, and the cable is protected by the soft elasticity of the rubber anti-slip pad 44 in the arc clamping plates 43, so that the stability of the cable is increased.

In summary, as shown in fig. 1-5, when the current transformer for medium voltage wire connection in an electric power system is used, the fixing support 3 below the current transformer is fixedly installed on a metal framework through the threaded installation hole 31 by using bolts, then a cable of the electric power system penetrates through the interior of the current transformer body 1, then the two screws 42 are rotated to enable the screws 42 to drive the arc clamping plates 43 to move, the cable is clamped and fixed in the interior between the two arc clamping plates 43, the cable is fixed, the connecting terminal 7 is connected with the ammeter through a wire, at the moment, the current is induced from the cable through the closed iron core 5 and the winding 6 in the current transformer, the magnitude of the induced current can be reduced by a certain multiple, and the induced current is transmitted to the ammeter, for example, when the current transformer is damaged after long-time use, the maintenance or replacement is needed, the staff pulls the pull rod 23 through the handle 22, so that the pull rod 23 pulls the iron clamping block 24 to separate from the inside of the installation frame 25, meanwhile, the iron clamping block 24 drives the movable rod 26 and the pressing plate 271 to move, so that the pressing plate 271 compresses the reset spring 273, meanwhile, the iron clamping block 24 moves to one side of the positioning magnetic block 28 and is magnetically adsorbed with the positioning magnetic block 28, the magnetic adsorption force of the positioning magnetic block 28 in contact with the iron clamping block 24 is larger than the rebound resilience of the reset spring 273, at the moment, the staff can move the current transformer upwards, so that the current transformer is taken out from the inside of the positioning cover 21, so that the current transformer is convenient to overhaul or replace, then the current transformer after overhaul or replacement is inserted into the inner cavity of the positioning cover 21, the staff pushes the pull rod 23 and the iron clamping block 24 to move through the handle 22, so that the iron clamping block 24 is separated from the positioning magnetic block 28, meanwhile, the pressing plate 271, the movable rod 26 and the iron clamping block 24 are pushed to move by the rebound resilience of the reset spring 273, so that the iron clamping block 24 is clamped into the inner cavity of the mounting frame 25 again, and the current transformer is fixedly mounted in the inner cavity of the positioning cover 21.

The last points to be described are: first, in the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed;

secondly: in the drawings of the disclosed embodiments, only the structures related to the embodiments of the present disclosure are referred to, and other structures can refer to the common design, so that the same embodiment and different embodiments of the present disclosure can be combined with each other under the condition of no conflict;

finally: the foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. The utility model provides a current transformer for line connection is pressed in electric power system, includes current transformer body (1), its characterized in that, the inside of current transformer body (1) is equipped with closed iron core (5), the outer wall of closed iron core (5) is equipped with winding (6), the both sides of current transformer body (1) openly below are equipped with binding post (7), the below of current transformer body (1) is equipped with dismouting mechanism (2), the front of current transformer body (1) is equipped with cable positioning mechanism (4);

the dismounting mechanism (2) comprises a positioning cover (21), the bottom of the current transformer body (1) is movably inserted into an inner cavity at the top of the positioning cover (21), pull rods (23) are movably sleeved on two sides of the positioning cover (21), one ends of the pull rods (23) are fixedly connected with handles (22), the bottoms of the two sides of the current transformer body (1) are fixedly connected with mounting frames (25), the mounting frames (25) are lapped in the positioning cover (21), iron clamping blocks (24) are movably clamped in one side of the mounting frames (25), and the other ends of the pull rods (23) extend to the inner parts of the mounting frames (25) and are fixedly connected to the middle parts of one side of the iron clamping blocks (24);

the cable positioning mechanism (4) comprises two arc clamping plates (43), wherein the number of the arc clamping plates (43) is two, the two arc clamping plates (43) are positioned on two sides of the front face of the current transformer body (1), the two arc clamping plates (43) are fixedly connected with rubber anti-slip pads (44) on the inner wall, and the two arc clamping plates (43) are rotatably connected with screw rods (42) on the middle of one side of each arc clamping plate.

2. A current transformer for connection of medium voltage outgoing lines in a power system as claimed in claim 1, wherein: the positioning cover is characterized in that two sides of the inner cavity of the positioning cover (21) are fixedly connected with hollow reset rods (27), one end of the outer wall of each hollow reset rod (27) is fixedly connected with a positioning magnetic block (28), one end of each hollow reset rod (27) is movably sleeved with a movable rod (26), and one end of each movable rod (26) is fixedly connected to one side of an iron clamping block (24).

3. A current transformer for connection of medium voltage outgoing lines in a power system as claimed in claim 2, wherein: the other end of the movable rod (26) extends to the inner cavity of the hollow reset rod (27) and is fixedly connected with a pressing plate (271), guide rods (272) are symmetrically and movably sleeved on the upper side and the lower side of the inside of the pressing plate (271), and two ends of the guide rods (272) are fixedly connected to two ends of the inner cavity of the hollow reset rod (27).

4. A current transformer for connection of medium voltage outgoing lines in a power system as claimed in claim 3, wherein: the outer wall activity of guide bar (272) has cup jointed reset spring (273), one end fixed connection of reset spring (273) is in one side of clamp plate (271), the other end fixed connection of reset spring (273) is in the one end of hollow reset lever (27) inner chamber.

5. A current transformer for connection of medium voltage outgoing lines in a power system as claimed in claim 1, wherein: the current transformer is characterized in that the two sides of the front face of the current transformer body (1) are fixedly connected with mounting blocks (41), and the outer wall threads of the screw rods (42) are sleeved in the mounting blocks (41).

6. The current transformer for connecting medium voltage outgoing lines of a power system as claimed in claim 5, wherein: one side of the mounting block (41) is hinged with a hinged connecting rod (45), and one end of the hinged connecting rod (45) is hinged to one side of the arc-shaped clamping plate (43).

7. A current transformer for connection of medium voltage outgoing lines in a power system as claimed in claim 1, wherein: the bottom of locating cover (21) fixedly connected with fixed bolster (3), threaded mounting hole (31) have been seted up to the bilateral symmetry at fixed bolster (3) top.