CN218782898U

CN218782898U - Sleeve type current transformer

Info

Publication number: CN218782898U
Application number: CN202223052282.9U
Authority: CN
Inventors: 查秀旺; 李文; 罗玉娟
Original assignee: Shenzhen Wangwen Technology Development Co ltd
Current assignee: Wuhan Ansei Electronics Co ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-03-31
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a bushing type current transformer relates to current transformer technical field, including annular shell and the electricity shell that connects of fixed mounting at annular shell surface, the fixed cover has connect a threading section of thick bamboo in the interior rampart of annular shell, the inside of a threading section of thick bamboo is provided with card line mechanism, the fixed magnetic ring that is provided with in inside of annular shell, the surface winding of magnetic ring has winding coil, the inside of connecing the electricity shell is provided with adjusting part. The utility model discloses a threading section of thick bamboo and cooperation design of card line mechanism, outwards stimulate two and draw the otic placode, cardboard and outer cardboard back of the body motion in making, with the interval between expansion interior cardboard and the outer cardboard, then pass the space department between interior cardboard and the outer cardboard to the cable in mainstream return circuit, loosen two and draw the otic placode again, under the pulling force effect of extension spring, interior cardboard and outer cardboard are to the butt clamp, can fix this current transformer on the circuit that is detected, improve this current transformer's installation portability.

Description

Sleeve type current transformer

Technical Field

The utility model relates to a current transformer technical field specifically is a bushing type current transformer.

Background

The sleeve type current transformer is a current transformer directly sleeved on an insulated sleeve or an insulated wire, generally only has a primary coil, a main current loop generally only has one wire penetrating through the inside of a magnetic ring of the main current loop to provide a magnetic field for the inside of the magnetic ring, so that a sampling current signal is generated in the primary coil, and the sleeve type current transformer selects a high-quality silicon steel sheet with high magnetic conductivity to manufacture a magnetic conductive ring, so that the sleeve type current transformer has high measurement accuracy and low instrument security coefficient. The current measuring, metering and protecting device is generally applicable to current measurement, metering and protection of distribution lines, transformers and electric equipment of an electric power system.

When in use, the sleeve type current transformer is generally sleeved on a cable of a main flow loop, and is wound in a winding coil on the magnetic conductive ring to generate a sampling current signal which is fed back to the sampling circuit. In the practical use process, the sleeve type current transformer is movably sleeved on a cable of a main flow loop and needs to be fixed through an auxiliary component, the sleeve type current transformer is not convenient to fixedly install due to the limitation of an installation space, in addition, the number of turns of a winding coil of the current transformer is fixed, the winding coil is connected in series in a measuring instrument or a protection loop, the signal intensity of an induced current signal provided for a sampling circuit is certain, in the practical implementation and application, the signal intensity of the induced current signal output by the current transformer is not necessarily matched with the sampling signal intensity of the sampling circuit, debugging is often needed, and therefore the current transformer is difficult to be compatible with different sampling circuits and is poor in compatibility and applicability. To this end, we provide a bushing type current transformer that solves the above problems.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

The utility model aims at providing a bushing type current transformer in order to compensate the deficiency of the prior art.

Technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a bushing type current transformer, includes that annular shell and fixed mounting connect the electric shell at annular shell surface, the fixed cover has connect a threading section of thick bamboo in the interior rampart of annular shell, the inside of a threading section of thick bamboo is provided with card line mechanism, the fixed magnetic ring that is provided with in inside of annular shell, the surface winding of magnetic ring has winding coil, the inside that connects the electric shell is provided with adjusting part, fixed mounting has first electrical connector and second electrical connector on the conch wall that connects the electric shell, winding coil's one end and first electrical connector electricity are connected, winding coil's the other end passes through adjusting part and second electrical connector electricity is connected.

The wire clamping mechanism comprises an inner clamping plate and an outer clamping plate which are arranged inside the wire threading cylinder, the inner clamping plate and the outer clamping plate are symmetrically arranged, the inner clamping plate is arranged inside the outer clamping plate in a sliding mode, a group of pull rods are fixedly connected to one ends, far away from each other, of the inner clamping plate and the outer clamping plate, the two groups of pull rods penetrate through the cylinder wall of the wire threading cylinder, extend to the outside of the wire threading cylinder and are sleeved with tension springs in a sliding mode, the outer surfaces of the two groups of pull rods are in sliding contact with the cylinder wall of the wire threading cylinder, two lug plates are arranged outside the wire threading cylinder, one ends, far away from each other, of the two groups of pull rods are fixedly connected with one lug plate respectively, and each of the two ends of each tension spring is fixedly connected with the outer wall of the wire threading cylinder and the lug plates respectively.

The thread passing cylinder is characterized in that one end, opposite to the inner clamping plate, of the outer clamping plate is fixedly connected with four first slide bars, one end, opposite to the outer clamping plate, of the inner clamping plate is fixedly connected with four second slide bars, four first bar-shaped holes corresponding to the positions of the first slide bars and four second bar-shaped holes corresponding to the positions of the second slide bars are formed in the wall of the thread passing cylinder, the four first slide bars respectively penetrate through the four first bar-shaped holes and extend to the outside of the thread passing cylinder, and the four second slide bars respectively penetrate through the four second bar-shaped holes and extend to the outside of the thread passing cylinder.

The inner clamping plate and the outer clamping plate are both V-shaped in overlooking shape, and anti-skid grains are arranged on one side face, close to each other, of the inner clamping plate and one side face, close to each other, of the outer clamping plate.

In the above description, the threading cylinder, the inner clamping plate, the outer clamping plate, the first sliding rod, the second sliding rod and the pull rod are all made of insulating non-magnetic materials.

Foretell, the regulating part is drawn the material hole including fixed the setting in connecing the inside insulation board of electricity shell and seting up the bar on connecing the electricity shell conch wall, the inside fixed of insulation board is inlayed and is had one row of conducting strip, the winding coil all leaves at every winding several circles of outside of magnetic ring and takes a tap and be connected with one row of conducting strip electricity respectively, the inside slip in bar material hole is provided with the slider, the slider is close to the one end fixedly connected with conducting head of insulation board, and conducting head and one of them conducting strip sliding contact nature electricity are connected, connect the inside fixedly connected with of electricity shell and the elastic conductive bar that the second electricity connects the post electricity to be connected, the elastic conductive bar is connected with conducting head sliding contact nature electricity under the elastic action of self.

The outer surface of the power receiving shell is provided with a scale bar, and one end of the sliding block, close to the scale bar, is provided with an indication tip.

Has the advantages that:

compared with the prior art, this bushing type current transformer possesses following beneficial effect:

1. the utility model discloses a threading section of thick bamboo and cooperation design of card line mechanism, outwards stimulate two ear plates that draw, cardboard and outer cardboard back of the body motion in making, with the interval between expansion interior cardboard and the outer cardboard, then space department between cardboard and the outer cardboard in passing the cable in mainstream return circuit, loosen two ear plates that draw again, under the pulling force effect of extension spring, interior cardboard and outer cardboard are to the butt clamp, can fix this current transformer on the circuit that is detected, improve this current transformer's installation portability.

2. The utility model discloses a winding coil, the second connects electric post and adjusting part's cooperation design, in this current transformer's use, adjusting part through setting up, the horizontal slip slider, can make the second connect electric post to be connected with different conducting strip electricity, because winding coil all leaves at every winding number circle of the outside of magnetic conductive ring and takes a percentage respectively to be connected with one row of conducting strip electricity, so the horizontal slip slider just can make the second connect electric post to be connected with the winding coil electricity of different turns and be connected, thereby can adjust the number of turns that utilizes of this current transformer's sampling coil, with the signal strength who adjusts its sampling current signal of output, be convenient for and different sampling circuit are compatible, thereby can improve compatibility and the suitability of this current transformer under the use scene of difference.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic perspective view of the bushing type current transformer;

fig. 2 is a schematic perspective view of the thread passing tube and the thread clamping mechanism of the present invention;

fig. 3 is a schematic perspective view of the middle wire clamping mechanism of the present invention;

fig. 4 is a top view perspective sectional view of a partial structure of the bushing type current transformer.

In the figure:

1. an annular shell; 2. a power receiving shell; 3. a first electric connecting post; 4. a second electric connecting post;

5. an adjustment assembly; 51. an insulating plate; 52. a conductive sheet; 53. strip-shaped material drawing holes; 54. a slider (54); 55. a conductive head; 56. an elastic conductive strip; 57. a scale bar;

6. a threading cylinder;

7. a wire clamping mechanism; 71. an inner clamping plate; 72. an outer clamping plate; 73. a first slide bar; 74. a second slide bar; 75. a pull rod; 76. a first bar-shaped hole; 77. a second bar-shaped hole; 78. a tension spring; 79. pulling the lug plate; 710. anti-skid lines;

8. a magnetic conductive ring; 9. and winding the coil.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a technical solution: the utility model provides a bushing type current transformer, includes that annular shell (1) and fixed mounting connect electric shell (2) at annular shell (1) surface, fixed cover in the interior rampart of annular shell (1) has connect a threading section of thick bamboo (6), the inside of a threading section of thick bamboo (6) is provided with card line mechanism (7), the fixed magnetic ring (8) that is provided with in inside of annular shell (1), the surface winding of magnetic ring (8) has winding coil (9), the inside of electricity shell (2) is provided with adjusting part (5), fixed mounting has first electric post (3) and second electric post (4) of connecting on the conch wall of electricity shell (2), the one end and the first electric post (3) of connecting of winding coil (9) are connected, the other end of winding coil (9) is connected electric post (4) electricity through adjusting part (5) and second, and adjusting part (5) are used for making second electric post (4) and winding coil (9) of different turns carry out the electricity and are connected.

The wire clamping mechanism (7) comprises an inner clamping plate (71) and an outer clamping plate (72) which are arranged inside the threading cylinder (6), the inner clamping plate (71) and the outer clamping plate (72) are symmetrically arranged, the inner clamping plate (71) is arranged inside the outer clamping plate (72) in a sliding manner, one ends, far away from each other, of the inner clamping plate (71) and the outer clamping plate (72) are fixedly connected with a group of pull rods (75), the two groups of pull rods (75) penetrate through the cylinder wall of the threading cylinder (6) and extend to the outside of the threading cylinder (6) and are sleeved with tension springs (78) in a sliding manner, the outer surfaces of the two groups of pull rods (75) are in sliding contact with the cylinder wall of the threading cylinder (6), two lug pulling plates (79) are arranged outside the threading cylinder (6), one ends, far away from each other, of the two groups of pull rods (75) are fixedly connected with one lug plate (79) respectively, two ends of each tension spring (78) are fixedly connected with the outer wall of the lug plate (6) and the lug plates (79) respectively, under the tension of the tension springs (78), the inner clamping plate and the inner clamping plate (71) and the outer clamping plate (72) can move towards the main current circuit, the inner clamping plate (71) and the outer clamping plate (72) to be clamped between the inner clamping plate (72), the main current of the mutual inductor (71) and the inner clamping plate (72), the installation portability of the current transformer is improved.

The wire penetrating tube comprises an outer clamping plate (72), an inner clamping plate (71), four first sliding rods (73), four second sliding rods (74), four first strip-shaped holes (76) and four second strip-shaped holes (77), wherein the ends, opposite to the outer clamping plate (71), of the outer clamping plate (72) are fixedly connected, the tube wall of the wire penetrating tube (6) is provided with four first strip-shaped holes (76) corresponding to the positions of the first sliding rods (73) and four second strip-shaped holes (77) corresponding to the positions of the second sliding rods (74), the four first sliding rods (73) penetrate through the four first strip-shaped holes (76) respectively and extend to the outside of the wire penetrating tube (6), the four second sliding rods (74) penetrate through the four second strip-shaped holes (77) respectively and extend to the outside of the wire penetrating tube (6), and the scheme is used for limiting the inner clamping plate (71) and the outer clamping plate (72) so that the inner clamping plate (71) and the outer clamping plate (72) can horizontally move in the wire penetrating tube (6).

The overlooking shape of the inner clamping plate (71) and the overlooking shape of the outer clamping plate (72) are both V-shaped, one side face, close to each other, of the inner clamping plate (71) and one side face, close to each other, of the outer clamping plate (72), the cable of the main flow loop penetrates through a gap between the inner clamping plate (71) and the outer clamping plate (72), then two pull lug plates (79) are loosened, the inner clamping plate (71) and the outer clamping plate (72) are clamped oppositely under the action of the tension spring (78), and the V-shaped inner clamping plate (71) and the V-shaped outer clamping plate (72) are convenient to clamp the cable.

The threading cylinder (6), the inner clamping plate (71), the outer clamping plate (72), the first sliding rod (73), the second sliding rod (74) and the pull rod (75) are all made of insulating non-magnetic materials, and influence on a magnetic circuit in the current transformer is avoided.

The adjusting assembly (5) comprises an insulating plate (51) fixedly arranged inside the electricity-connecting shell (2) and a strip-shaped drawing hole (53) formed in the wall of the electricity-connecting shell (2), a row of conducting strips (52) are fixedly embedded inside the insulating plate (51), taps of the winding coil (9) are reserved outside the magnetic conduction ring (8) every winding number of turns and are respectively electrically connected with the row of conducting strips (52), a sliding block (54) is arranged inside the strip-shaped drawing hole (53) in a sliding mode, one end, close to the insulating plate (51), of the sliding block (54) is fixedly connected with a conducting head (55), the conducting head (55) is electrically connected with one conducting strip (52) in a sliding contact mode, an elastic conducting strip (56) electrically connected with the second electricity-connecting column (4) is fixedly connected inside the electricity-connecting shell (2), and the elastic conducting strip (56) is electrically connected with the conducting head (55) in a sliding contact mode under the elastic action of the elastic conducting strip (56); the left-right sliding block (54) can enable the second electric connecting column (4) to be electrically connected with different conducting strips (52), and because a winding coil (9) is wound in the outside of the magnetic conductive ring (8) for several circles, a tap is reserved and is respectively electrically connected with a row of conducting strips (52), the left-right sliding block (54) can enable the second electric connecting column (4) to be electrically connected with the winding coils (9) with different turns, so that the number of turns of the sampling coil of the current transformer can be adjusted, and the signal intensity of the sampling current signal output by the current transformer can be adjusted.

The outer surface of the electricity-connecting shell (2) is provided with a scale bar (57), one end of the sliding block (54) close to the scale bar (57) is provided with an indicating tip for indicating the electric connection information of the second electricity-connecting column (4) and one conducting strip (52) in the row of conducting strips (52).

The working principle is as follows: when the current transformer is used, firstly, the two lug pulling plates (79) are pulled outwards to enable the inner clamping plate (71) and the outer clamping plate (72) to move oppositely so as to enlarge the distance between the inner clamping plate (71) and the outer clamping plate (72), then a cable of a main flow loop passes through the gap between the inner clamping plate (71) and the outer clamping plate (72), then the two lug pulling plates (79) are loosened, under the action of the pulling force of the tension spring (78), the inner clamping plate (71) and the outer clamping plate (72) are clamped oppositely, the current transformer can be fixed on a detected circuit, the installation portability of the current transformer is improved, in the using process of the current transformer, the adjusting component (5) and the left-right sliding slide block (54) are arranged, can make second electric post (4) be connected with conducting strip (52) electricity of difference and be connected, because winding coil (9) are every winding several circles in the outside of magnetic ring (8) and all leave to take a percentage and are connected with one row of conducting strip (52) electricity respectively, so slide block (54) about can make second electric post (4) be connected with winding coil (9) electricity of different turns, thereby can adjust the number of turns that utilizes of this current transformer's sampling coil, with the signal strength of adjusting its sampling current signal of output, it is compatible with different sampling circuit to be convenient for, thereby can improve the compatibility of this current transformer under the use scene of difference, better suitability has.

It should be noted that, in the present specification, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "fixedly," "mounted," "connected," and "connected" are to be construed broadly, e.g., "mounted" may be a fixed connection, a removable connection, or an integral connection; "connected" may be mechanically or electrically connected; "connected" may be directly connected or indirectly connected through an intermediate member, or may be internal or external to two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

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. The utility model provides a bushing type current transformer, includes that annular shell (1) and fixed mounting connect electric shell (2), its characterized in that at annular shell (1) surface: fixed cover in the interior rampart of annular shell (1) has connect a threading section of thick bamboo (6), the inside of a threading section of thick bamboo (6) is provided with card line mechanism (7), the inside fixed magnetic ring (8) that is provided with of annular shell (1), the surface winding of magnetic ring (8) has winding coil (9), the inside of connecing electricity shell (2) is provided with adjusting part (5), fixed mounting has first electric post (3) and second electric post (4) of connecing on the conch wall of electricity shell (2), the one end and the first electric post (3) of connecing of winding coil (9) are connected, the other end of winding coil (9) is connected with second electric post (4) electricity through adjusting part (5).

2. The bushing type current transformer according to claim 1, wherein: the thread clamping mechanism (7) comprises an inner clamping plate (71) and an outer clamping plate (72) which are arranged inside the thread passing cylinder (6), the inner clamping plate (71) and the outer clamping plate (72) are symmetrically arranged, the inner clamping plate (71) is arranged inside the outer clamping plate (72) in a sliding mode, one end, far away from each other, of the inner clamping plate (71) and the outer clamping plate (72) is fixedly connected with a group of pull rods (75), the two groups of pull rods (75) penetrate through the cylinder wall of the thread passing cylinder (6) and extend to the outside of the thread passing cylinder (6) and are sleeved with tension springs (78) in a sliding mode, the outer surfaces of the two groups of pull rods (75) are in sliding contact with the cylinder wall of the thread passing cylinder (6), two lug pulling plates (79) are arranged on the outside of the thread passing cylinder (6), one end, far away from each other, of the two groups of pull rods (75) is fixedly connected with one lug pulling plate (79), and two ends of each tension spring (78) are fixedly connected with the outer wall of the thread passing cylinder (6) and the lug plates (79) respectively.

3. The bushing type current transformer according to claim 2, wherein: the wire threading tube is characterized in that one end, opposite to the inner clamping plate (71), of the outer clamping plate (72) is fixedly connected with four first sliding rods (73), one end, opposite to the outer clamping plate (72), of the inner clamping plate (71) is fixedly connected with four second sliding rods (74), four first strip-shaped holes (76) corresponding to the positions of the first sliding rods (73) and four second strip-shaped holes (77) corresponding to the positions of the second sliding rods (74) are formed in the tube wall of the wire threading tube (6), the four first sliding rods (73) penetrate through the four first strip-shaped holes (76) respectively and extend to the outside of the wire threading tube (6), and the four second sliding rods (74) penetrate through the four second strip-shaped holes (77) respectively and extend to the outside of the wire threading tube (6).

4. The bushing type current transformer according to claim 3, wherein: the top view shape of the inner clamping plate (71) and the top view shape of the outer clamping plate (72) are both V-shaped, and anti-skid grains (710) are arranged on one side face, close to each other, of the inner clamping plate (71) and the side face, close to each other, of the outer clamping plate (72).

5. The bushing type current transformer according to claim 1, wherein: adjusting part (5) draw material hole (53) including fixed insulation board (51) that sets up in connecing electricity shell (2) inside and the strip of seting up on connecing electricity shell (2) the conch wall, the inside fixed of insulation board (51) is inlayed and is had one row of conducting strip (52), winding coil (9) are every winding several circles in the outside of magnetic ring (8) and are all stayed to take a percentage and are connected with one row of conducting strip (52) electricity respectively, the strip is drawn the inside slip of material hole (53) and is provided with slider (54), slider (54) are close to the one end fixedly connected with conducting head (55) of insulation board (51), and conducting head (55) are connected with one of conducting strip (52) sliding contact nature electricity, the inside fixedly connected with of connecing electricity shell (2) connects elastic conductor bar (56) of electricity with second electric connection post (4) electricity, elastic conductor bar (56) are connected with conducting head (55) sliding contact nature electricity under self elastic action.

6. The bushing type current transformer according to claim 5, wherein: the outer surface of the electricity receiving shell (2) is provided with a scale strip (57), and one end, close to the scale strip (57), of the sliding block (54) is provided with an indication tip.

7. The bushing type current transformer according to claim 3, wherein: the threading cylinder (6), the inner clamping plate (71), the outer clamping plate (72), the first sliding rod (73), the second sliding rod (74) and the pull rod (75) are all made of insulating non-magnetic materials.