CN215493788U

CN215493788U - Open circuit prevention device for secondary side of current transformer

Info

Publication number: CN215493788U
Application number: CN202121750196.8U
Authority: CN
Inventors: 杨志超; 李振永; 窦一迪; 陈鹏; 庄巨峰; 高飞
Original assignee: Kunneng Electric Power Engineering Consulting Co ltd
Current assignee: Kunneng Electric Power Engineering Consulting Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-11
Anticipated expiration: 2031-07-29

Abstract

The utility model relates to the technical field of power equipment protection, in particular to a secondary side open-circuit prevention device of a current transformer, and provides a scheme for solving the problems in the background art. The protective cover can protect the top of the secondary terminal base, so that the problem that dust falls on the top of the secondary terminal base after long-time use to cause inconvenience in cleaning is avoided; the rotating rod is driven to rotate through the rotating knob inserted bar, so that the connecting rod and the two wiring terminals can be connected or separated, the connecting rod can be placed and fixed when the connecting rod is separated, the connecting rod is prevented from being lapped with the two wiring terminals unintentionally, and the safety and the stability of the device are guaranteed.

Description

Open circuit prevention device for secondary side of current transformer

Technical Field

The utility model relates to the technical field of power equipment protection, in particular to a secondary side open-circuit prevention device of a current transformer.

Background

The current transformer is widely applied to the field of power transmission and transformation and mainly used for measurement and protection, the secondary winding of the current transformer in operation is forbidden to be opened, once the current transformer is opened, extremely high voltage is generated to endanger personal safety, and in addition, the insulation of the secondary winding can be damaged by the high voltage, so that the deterioration of main insulation is caused, and finally, the main insulation fault of a product is caused, and safety accidents such as equipment explosion are caused.

When the current transformer is operated, the secondary current is not allowed to be opened, and in the case of opening, the following occurs: 1. high voltage is generated secondarily, and the high voltage can break through the insulation of the current transformer, so that the shell of the whole power distribution equipment is electrified to generate electric shock danger; 2. the iron core sudden change saturation can increase the iron core loss of the mutual inductor, and the iron core can generate heat to damage the mutual inductor; 3. the saturation core of the mutual inductor is saturated, the metering is not aligned, and the CT specific difference and the angle difference are increased. To solve this problem, a secondary current short circuit is required upon installation. In the prior art, a short connecting sheet or a short connecting line is generally used for short-connecting the secondary current, and then the work of disconnecting or connecting the line is carried out, wherein the disconnecting or connecting mode is complicated in the using process and is extremely inconvenient to use.

Through retrieval, the patent (application number: 201920938588.3) discloses a short circuit device for preventing secondary current from opening circuit when a current transformer operates, the device enables a short circuit connecting piece to be separated from or connected with two wiring terminals by rotating the short circuit connecting piece, so that the effects of convenient use and quick switching are achieved, but when conducting connection of a lead and the wiring terminals, the device is pressed and fixed through bolts, when conducting connection and disconnection of the lead, subsequent operation can be conducted only by screwing the bolts through an external tool, and the use of workers is not convenient enough.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a secondary side open-circuit prevention device of a current transformer.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a secondary side open-circuit prevention device of a current transformer comprises a secondary terminal base, wherein a connecting mechanism is installed at the top of the secondary terminal base, a rubber gasket which is bonded to the top of the secondary terminal base is arranged around the connecting mechanism, and a protective cover is arranged above the rubber gasket;

the connecting mechanism comprises a rotating rod rotatably connected to the top of the secondary terminal base, a lantern ring sleeved on the outer wall of the rotating rod, connecting rods welded on the outer walls of two sides of the lantern ring, a knob inserted rod inserted and connected to the top of the rotating rod and connecting components positioned on two sides of the rotating rod;

the connecting assembly comprises a connecting terminal arranged at the top of the secondary terminal base, a pressing rod inserted in the connecting terminal, a connecting plate welded at the top of the pressing rod, a fixing rod arranged on one side of the connecting terminal, a spring sleeved on the outer wall of the fixing rod and an L-shaped block arranged on the outer wall of one end of the connecting plate.

Preferably, the buckles are welded at the tops of the outer walls of the two sides of the secondary terminal base, the clamping blocks matched with the buckles are welded at the bottoms of the outer walls of the two sides of the protective cover, and the secondary terminal base and the protective cover are fixed through the buckles and the clamping blocks in a clamped mode.

Preferably, the welding of the top of secondary terminal base has the fixed block, and the slot with connecting rod looks adaptation is seted up to one side outer wall of fixed block.

Preferably, the bottom welding of knob inserted bar has square pole, and the top of dwang has seted up square groove, and square pole and square groove form interference fit, the top of protection casing seted up with the through-hole of knob inserted bar top outer wall specification looks adaptation.

Preferably, one side outer wall welding that binding post is close to the dwang has the connecting block, and one side outer wall of connecting block set up with the slot of connecting rod looks adaptation, the opening with binding post height looks adaptation is all seted up at one side outer wall both ends of protection casing.

Preferably, the bottom of the inside of the wiring terminal is welded with a U-shaped block, the bottom of the pressing rod is welded with an inserting block, and the specification of the inserting block is matched with the specification of the concave position of the U-shaped block.

Preferably, the bottom welding of dead lever has the installation piece, and installs the piece and pass through screwed connection in the top of secondary terminal base, the bottom of spring and the top welding of installation piece, the top of spring and the bottom welding of L type piece, the bottom of L type piece and the bottom one end of connecting plate all offer with the jack of dead lever looks adaptation, the top welding of dead lever has the stopper.

The utility model has the beneficial effects that:

1. the top of the secondary terminal base can be protected through the arranged protective cover, and the problem that dust falls on the top of the secondary terminal base after long-time use to cause inconvenience in cleaning is avoided;

2. the rotating rod is driven to rotate by rotating the knob inserted rod, the connecting rods on two sides are driven to rotate by the rotating rod through the lantern ring, when the connecting rods rotate to the slot at the connecting block, the two wiring terminals can be mutually communicated through the connecting rods and the lantern ring, and when the connecting rods rotate to the slot of the fixing block, the connecting rods can be separated from the two wiring terminals and placed and fixed, so that the connecting rods are prevented from being lapped with the two wiring terminals unintentionally, and the safety and the stability of the device are ensured;

3. when the wire needs to be removed from the wiring terminal, the connecting plate is lifted upwards, the connecting plate drives the pressing rod to move upwards, the pressing rod drives the insert block to be away from the U-shaped block, the wire can be taken out from the inside of the wiring terminal, the wire is inserted into the wiring terminal during wiring, the connecting plate is loosened, the spring shrinks to drive the L-shaped block to move downwards, the L-shaped block drives the connecting plate to move downwards, the connecting plate drives the insert block to extrude and fix the wire between the U-shaped block and the insert block, and the wire connecting device is simple, rapid and convenient to use by workers.

Drawings

Fig. 1 is a schematic diagram of a structure of a connecting assembly of a secondary side open-circuit prevention device of a current transformer according to the present invention;

fig. 2 is a schematic diagram of a split overall structure of a secondary side open-circuit prevention device of a current transformer according to the present invention;

fig. 3 is a schematic structural diagram of a connection mechanism of a secondary side open-circuit prevention device of a current transformer according to the present invention;

fig. 4 is a schematic diagram of an overall structure of a secondary side open-circuit prevention device of a current transformer according to the present invention.

In the figure: 1 secondary terminal base, 101 buckle, 2 coupling mechanism, 3 rubber packing rings, 4 protection casings, 401 fixture block, 5 dwang, 6 lantern rings, 7 connecting rods, 8 fixed blocks, 9 knob inserted bars, 10 coupling assembling, 11 binding post, 12 connecting blocks, 13U type piece, 14 inserted blocks, 15 depression bars, 16 connecting plates, 17 installation piece, 18 dead lever, 19 springs, 20L type piece, 21 stopper.

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.

Referring to fig. 1-4, a secondary side open-circuit prevention device of a current transformer comprises a secondary terminal base 1, wherein a connecting mechanism 2 is installed at the top of the secondary terminal base 1, rubber gaskets 3 which are bonded to the top of the secondary terminal base 1 are arranged around the connecting mechanism 2, a protective cover 4 is arranged above the rubber gaskets 3, buckles 101 are welded to the tops of the outer walls of the two sides of the secondary terminal base 1, clamping blocks 401 which are matched with the buckles 101 are welded to the bottoms of the outer walls of the two sides of the protective cover 4, the secondary terminal base 1 and the protective cover 4 are fixed through the buckles 101 and the clamping blocks 401 in a clamping mode, the top of the secondary terminal base 1 can be protected through the arranged protective cover 4, and the problem that dust falls on the top of the secondary terminal base 1 after long-time use to cause inconvenience in cleaning is avoided;

the connecting mechanism 2 comprises a rotating rod 5, a lantern ring 6, connecting rods 7, a knob inserted link 9 and connecting assemblies 10, the bottom of the rotating rod 5 is rotatably connected to the top of the secondary terminal base 1, the lantern ring 6 is sleeved on the outer wall of the rotating rod 5, the two connecting rods 7 are respectively welded on the outer walls of the two sides of the lantern ring 6, the knob inserted link 9 is inserted into the top of the rotating rod 5, a fixed block 8 is welded on the top of the secondary terminal base 1, an inserting groove matched with the connecting rod 7 is formed in the outer wall of one side of the fixed block 8, a square rod is welded at the bottom of the knob inserted link 9, a square groove is formed in the top of the rotating rod 5, the square rod and the square groove form interference fit, a through hole matched with the specification of the outer wall of the top of the knob inserted link 9 is formed in the top of the protective cover 4, and the two connecting assemblies 10 are respectively positioned on the two sides of the rotating rod 5, the rotating rod 5 is driven to rotate through the rotating knob insertion rod 9, the rotating rod 5 drives the connecting rods 7 on two sides to rotate through the lantern ring 6, when the connecting rods 7 rotate to the slots at the connecting block 12, the two wiring terminals 11 can be mutually communicated through the connecting rods 7 and the lantern ring 6, and when the connecting rods 7 rotate to the slots of the fixing block 8, the connecting rods 7 can be separated from the two wiring terminals 11 and placed and fixed on the connecting rods 7, so that the connecting rods 7 are prevented from being lapped with the two wiring terminals 11 unintentionally, and the safety and the stability of the device are guaranteed;

the connecting assembly 10 comprises a connecting terminal 11, a pressing rod 15, a connecting plate 16, a fixing rod 18, a spring 19 and an L-shaped block 20, wherein the connecting terminal 11 is installed at the top of the secondary terminal base 1, the pressing rod 15 is inserted into the connecting terminal 11, the connecting block 12 is welded on the outer wall of one side, close to the rotating rod 5, of the connecting terminal 11, a slot matched with the connecting rod 7 is formed in the outer wall of one side of the connecting block 12, openings matched with the height of the connecting terminal 11 are formed in the two ends of the outer wall of one side of the protective cover 4, the connecting plate 16 is welded at the top of the pressing rod 15, the fixing rod 18 is arranged on one side of the connecting terminal 11, the spring 19 is sleeved on the outer wall of the fixing rod 18, the L-shaped block 20 is installed on the outer wall of one end of the connecting plate 16, an installation block 17 is welded at the bottom of the fixing rod 18, and the installation block 17 is connected to the top of the secondary terminal base 1 through screws, the bottom of the spring 19 is welded with the top of the mounting block 17, the top of the spring 19 is welded with the bottom of the L-shaped block 20, the bottom of the L-shaped block 20 and one end of the bottom of the connecting plate 16 are both provided with jacks matched with the fixed rod 18, the top of the fixed rod 18 is welded with a limiting block 21, when the wire is required to be disconnected from the wiring terminal 11, the connecting plate 16 is lifted upwards, the connecting plate 16 drives the pressing rod 15 to move upwards, the pressing rod 15 drives the inserting block 14 to be far away from the U-shaped block 13, can take the wire out from binding post 11's inside, during the wiring, insert the wire in binding post 11, loosen connecting plate 16, spring 19 contracts and drives L type piece 20 and move down, and L type piece 20 drives connecting plate 16 and moves down, and connecting plate 16 drives inserted block 14 and fixes the wire extrusion between U type piece 13 and inserted block 14, and is simple swift, the staff's of being convenient for use.

The working principle is as follows: the top of the secondary terminal base 1 can be protected through the arranged protective cover 4, the problem that dust falls on the top of the secondary terminal base 1 after long-time use to cause inconvenient cleaning is prevented, the rotating rod 5 is driven to rotate through the rotating knob inserted rod 9, the rotating rod 5 drives the connecting rods 7 on two sides to rotate through the lantern ring 6, when the connecting rods 7 rotate to the slot at the connecting block 12, the two wiring terminals 11 can be mutually communicated through the connecting rods 7 and the lantern ring 6, when the connecting rods 7 rotate to the slot of the fixing block 8, the connecting rods 7 are separated from the two wiring terminals 11, the connecting rods 7 are placed and fixed, and the connecting rods 7 are prevented from being lapped with the two wiring terminals 11 unintentionally;

when the wires need to be disconnected from the wiring terminal 11, the connecting plate 16 is lifted upwards, the connecting plate 16 drives the pressing rod 15 to move upwards, the pressing rod 15 drives the insertion block 14 to be far away from the U-shaped block 13, the wires can be pulled out from the inside of the wiring terminal 11, the wires are inserted into the wiring terminal 11 during wiring, the connecting plate 16 is loosened, the spring 19 contracts to drive the L-shaped block 20 to move downwards, the L-shaped block 20 drives the connecting plate 16 to move downwards, and the connecting plate 16 drives the insertion block 14 to extrude and fix the wires between the U-shaped block 13 and the insertion block 14.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A secondary side open-circuit prevention device of a current transformer comprises a secondary terminal base (1), and is characterized in that a connecting mechanism (2) is installed at the top of the secondary terminal base (1), a rubber gasket (3) which is bonded to the top of the secondary terminal base (1) is arranged around the connecting mechanism (2), and a protective cover (4) is arranged above the rubber gasket (3);

the connecting mechanism (2) comprises a rotating rod (5) rotatably connected to the top of the secondary terminal base (1), a lantern ring (6) sleeved on the outer wall of the rotating rod (5), connecting rods (7) welded on the outer walls on the two sides of the lantern ring (6), a knob inserted rod (9) inserted in the top of the rotating rod (5) and connecting components (10) positioned on the two sides of the rotating rod (5);

the connecting assembly (10) comprises a connecting terminal (11) arranged at the top of the secondary terminal base (1), a pressing rod (15) inserted into the connecting terminal (11), a connecting plate (16) welded to the top of the pressing rod (15), a fixing rod (18) arranged on one side of the connecting terminal (11), a spring (19) sleeved on the outer wall of the fixing rod (18) and an L-shaped block (20) arranged on the outer wall of one end of the connecting plate (16).

2. The secondary side open-circuit prevention device of the current transformer according to claim 1, wherein the buckles (101) are welded on the tops of the outer walls of the two sides of the secondary terminal base (1), the clamping blocks (401) matched with the buckles (101) are welded on the bottoms of the outer walls of the two sides of the protection cover (4), and the secondary terminal base (1) and the protection cover (4) are fixed through the buckles (101) and the clamping blocks (401).

3. The secondary side open-circuit prevention device of the current transformer according to claim 1, wherein a fixing block (8) is welded on the top of the secondary terminal base (1), and a slot matched with the connecting rod (7) is formed in the outer wall of one side of the fixing block (8).

4. The current transformer secondary side open-circuit prevention device as claimed in claim 1, wherein a square rod is welded at the bottom of the knob insertion rod (9), a square groove is formed at the top of the rotating rod (5), the square rod and the square groove form an interference fit, and a through hole matched with the specification of the outer wall at the top of the knob insertion rod (9) is formed at the top of the protection cover (4).

5. The secondary side open-circuit prevention device of the current transformer according to claim 1, wherein the connecting block (12) is welded on the outer wall of one side of the connecting terminal (11) close to the rotating rod (5), the slot matched with the connecting rod (7) is formed in the outer wall of one side of the connecting block (12), and the opening matched with the height of the connecting terminal (11) is formed in both ends of the outer wall of one side of the protective cover (4).

6. The secondary side open-circuit prevention device of the current transformer according to claim 1, wherein a U-shaped block (13) is welded at the bottom inside the connecting terminal (11), an insertion block (14) is welded at the bottom of the pressure lever (15), and the specification of the insertion block (14) is matched with the specification of the concave part of the U-shaped block (13).

7. The secondary side open-circuit prevention device of the current transformer as claimed in claim 1, wherein the mounting block (17) is welded at the bottom of the fixing rod (18), the mounting block (17) is connected to the top of the secondary terminal base (1) through screws, the bottom of the spring (19) is welded at the top of the mounting block (17), the top of the spring (19) is welded at the bottom of the L-shaped block (20), the bottom of the L-shaped block (20) and one end of the bottom of the connecting plate (16) are both provided with a jack matched with the fixing rod (18), and the top of the fixing rod (18) is welded with a limiting block (21).