CN213483546U

CN213483546U - Combined mutual inductor for metering

Info

Publication number: CN213483546U
Application number: CN202022925171.9U
Authority: CN
Inventors: 张建明; 康磊
Original assignee: Wolit Power Technology Group Co ltd
Current assignee: Wolit Power Technology Group Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-06-18
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a combination formula mutual-inductor is used in measurement, including the body, be equipped with the cabinet door on the lateral wall of body one side, the body includes the casing of inlayer, and casing outside surface is equipped with heat dissipation coating, and the fixed insulating layer that is equipped with of casing side surface, insulating layer inboard fixed are equipped with antistatic backing, and first installation indoor portion is fixed and is equipped with voltage transformer, and the inside fixed current transformer that is equipped with of second installation indoor portion. The utility model discloses set up second installation room and first installation room, installed current transformer and voltage transformer respectively in second installation room and first installation room, separately installed current transformer and voltage transformer in a device, each other do not influence and have realized the integral type combination again, solved single mutual-inductor trouble and leaded to the problem that whole device need be changed again, practiced thrift cost of maintenance.

Description

Combined mutual inductor for metering

Technical Field

The utility model relates to a mutual-inductor technical field specifically is a combination formula mutual-inductor is used in measurement.

Background

The combined transformer is generally a combination of a voltage transformer and a current transformer, and can be a combination of a voltage transformer and a current transformer and is used for measuring single-phase power; the device can be a combination of two voltage transformers and two current transformers and is used for measuring three-phase power in a three-phase three-wire system according to a two-watt metering method; or the combination of three voltage transformers and three current transformers is used for three-phase electric measurement, when the transformer is connected, the voltage terminal of the transformer is connected with the output of the transformer in parallel when the transformer is combined, and the current wire of the transformer passes through the combined transformer; the combined transformer can be connected with a load at the secondary output, as well as a voltage transformer and a current transformer, but the load is generally not suitable to exceed the nominal rated load of the transformer. The existing combined mutual inductor has the following defects: the current and voltage mutual inductors are cast into a whole by epoxy resin during manufacturing. The problem that exists is bulky, and weight is heavy, and the installation is inconvenient, and in use have a single-phase mutual-inductor to break down, can not demolish alone, and need whole changes, and extravagant very big. Moreover, most connectors of the existing combined transformer are exposed in the external environment, so that the electric leakage phenomenon is easy to occur, the connector lug is easy to corrode in rainy days, and rainwater can enter the inside of the combined transformer to cause internal damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a combination formula mutual-inductor is used in measurement to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a combined mutual inductor for metering comprises a body, wherein a second installation chamber is arranged on the upper side in the body, and a first installation chamber is arranged on the lower side of the second installation chamber;

a voltage transformer is fixedly arranged in the first mounting chamber, a first binding post is fixedly connected to one side of the voltage transformer, one end of the first binding post penetrates through the corresponding side wall of the body of the first mounting chamber, and a wire interface correspondingly connected with the first binding post is arranged outside the side wall of the body;

the current transformer is fixedly arranged inside the second installation chamber, a second binding post is fixedly connected to one side of the current transformer, one end of the second binding post penetrates through the side wall of the body corresponding to the second installation chamber, and a wire interface correspondingly connected with the second binding post is arranged outside the side wall of the body.

Among the above-mentioned technical scheme, divide into two installation rooms about the casing, voltage transformer and current transformer set up respectively in two installation rooms, and voltage transformer and current transformer pass through terminal and outside wire interface connection respectively, and the joint of outside wire passes through wire interface and inside first terminal and second terminal connection, realizes external circuit and this internal voltage transformer and the current transformer's of installing being connected.

As a further aspect of the present invention: the wire connector comprises a wire connector and is characterized in that a mounting cavity is formed in the center of the wire connector, an opening on the inner side of the mounting cavity corresponds to a corresponding binding post, an opening on the outer side of the mounting cavity is used for inserting a joint of an external wire, a mounting groove is formed in the side wall of the wire connector below the mounting cavity, a knob is arranged at the bottom of the wire connector, a rotating shaft is fixedly connected to the upper portion of the knob, the rotating shaft penetrates through the side wall of the bottom of the wire connector and extends into the mounting groove;

two bidirectional threaded rods are rotatably connected between the upper inner wall and the lower inner wall of the mounting cavity, and the rotating directions of the threads of the upper part and the lower part of the bidirectional threaded rods are opposite; the lower threads of the two bidirectional threaded rods are rotatably connected with a second connecting plate, the upper threads of the two bidirectional threaded rods are rotatably connected with a first connecting plate, and a gap between the two bidirectional threaded rods is used for penetrating through a joint of an external lead;

inside the lower extreme of two-way threaded rod extended to the mounting groove, at two-way threaded rod lower extremes coaxial coupling respectively with driven gear, two driven gear were located the driving gear both sides respectively, driven gear and driving gear meshing are connected.

The joint of the external lead is inserted in the installation cavity of the lead interface, and the end part of the joint of the external lead is connected with the corresponding binding post to realize electric conduction, so that an external circuit is connected with the voltage transformer and the current transformer; the rotary knob can drive the rotation axis and rotate, and then drive the driving gear and rotate, the driving gear drives the driven gear rotation of both sides, two driven gears drive two-way threaded rod respectively and rotate, because the screw thread direction of rotation of two parts is opposite about the two-way threaded rod, when the driving gear drives two-way threaded rod rotations through driven gear's transmission, can make the first connecting plate on upper portion move down, the second connecting plate of lower part shifts up, thereby press from both sides the external conductor of tight grafting in the installation cavity, realize external conductor's fixed.

Preferably, the body comprises a shell, the outer side surface of the shell is provided with a heat dissipation coating, the inner side surface of the shell is fixedly provided with an insulating layer, and the inner side of the insulating layer is fixedly provided with an anti-static layer.

Preferably, a cabinet door is arranged on the side wall of one side of the body.

Preferably, the body is provided with a rain shelter above the wire interface.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses set up second installation room and first installation room, through opening the cabinet door, installed current transformer and voltage transformer respectively in second installation room and first installation room, closed the cabinet door can, separately installed current transformer and voltage transformer in a device, each other does not influence and has realized the integral type combination again, has solved single mutual-inductor trouble and has leaded to the problem that whole device need be changed again, practices thrift cost of maintenance.

2. The utility model is provided with a wire interface, a first connecting plate and a second connecting plate, the joints of external wires are respectively inserted into the installation cavities of the corresponding wire interfaces and are connected and electrified with the internal binding posts; through rotatory knob, drive rotation axis, driving gear, driven gear in proper order and rotate to drive two-way threaded rod and rotate, make first connecting plate and second connecting plate press from both sides tight outside wire inwards, play the fixed action to outside wire, make wire connection convenient operation simple, and solved the joint of combination mutual-inductor and exposed can corroded problem under the external environment.

3. The utility model discloses set up rain-proof covering or awning on a car, boat, etc. canopy, heat dissipation coating, insulating layer and antistatic backing, it can prevent that the rainwater from passing through inside the wire interface gets into the body to keep off the rain-proof covering or awning on a car, boat, etc. canopy, heat dissipation coating helps the heat dissipation, and the insulating layer can prevent that the device from leaking electricity, and the antistatic backing can prevent that static from disturbing the device.

Drawings

Fig. 1 is an external structural schematic diagram of a combined instrument transformer for metering.

Fig. 2 is a schematic cross-sectional view of a combined instrument transformer for metering.

Fig. 3 is a schematic cross-sectional view of a wire interface of a combined transformer for metering.

Fig. 4 is a cross-sectional structural diagram of a mounting groove of the combined transformer for metering.

In the figure: 1. a body; 2. a cabinet door; 3. a rain shelter; 4. a wire interface; 5. a housing; 6. an insulating layer; 7. a heat-dissipating coating; 8. a first installation chamber; 9. a second installation chamber; 10. an antistatic layer; 11. a second terminal; 12. a current transformer; 13. a first terminal post; 14. a voltage transformer; 15. a first connecting plate; 16. a second connecting plate; 17. mounting grooves; 18. a knob; 19. a rotating shaft; 20. a driven gear; 21. a bidirectional threaded rod; 22. a driving gear; 23. and (7) installing a cavity.

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.

Referring to fig. 1-4, in an embodiment of the present invention, a combined transformer for metering includes a body 1, a second installation chamber 9 is disposed at an upper side inside the body 1, and a first installation chamber 8 is disposed at a lower side of the second installation chamber 9.

The inside fixed voltage transformer 14 that is equipped with of first installation room 8, voltage transformer 14 one side fixedly connected with first terminal 13, first terminal 13 one end runs through the 1 lateral wall of body that first installation room 8 corresponds, and 1 lateral wall of body is equipped with outward and corresponds wire interface 4 of being connected with first terminal 13.

The inside fixed current transformer 12 that is equipped with of second installation room 9, current transformer 12 one side fixedly connected with second terminal 11, the body 1 lateral wall that second installation room 9 corresponds is run through to second terminal 11 one end, and body 1 lateral wall is equipped with outward and corresponds the wire interface 4 of being connected with second terminal 11.

The first binding post 13 and the second binding post 11 can be set to have corresponding numbers according to the wiring requirements of the voltage transformer 14 and the current transformer 12, and each corresponding binding post corresponds to one wire interface 4.

Installation cavity 23 has been seted up at wire interface 4 center, the inboard opening part of installation cavity 23 is corresponding to corresponding terminal, the opening in the installation cavity 23 outside is used for pegging graft the joint of outside wire, installation groove 17 has been seted up to the position that is located installation cavity 23 below on the 4 lateral walls of wire interface, wire interface 4 bottom is equipped with

knob

18, 18 upper portion fixedly connected with rotation axis 19 of knob, rotation axis 19 runs through wire interface 4 bottom lateral wall and extends to inside the

installation groove

17, 19 upper end fixedly connected with driving gear 22 of rotation axis.

Two bidirectional threaded rods 21 are rotatably connected between the upper inner wall and the lower inner wall of the mounting cavity 23, and the rotating directions of the threads of the upper part and the lower part of the bidirectional threaded rods 21 are opposite; the lower threads of the two bidirectional threaded rods 21 are rotatably connected with a second connecting plate 16, the upper threads of the two bidirectional threaded rods 21 are rotatably connected with a first connecting plate 15, and a gap between the two bidirectional threaded rods 21 is used for allowing a joint of an external wire to pass through.

The lower extreme of two-way threaded rod 21 extends to inside the mounting groove 17, is connected with driven gear 20 at two-way threaded rod 21 lower extremes respectively coaxial, and two driven gear 20 are located driving gear 22 both sides respectively, and driven gear 20 is connected with driving gear 22 meshing.

When the external lead connector is inserted into the mounting cavity 23, the external lead connector is contacted with the binding post for conducting electricity; first connecting plate 15 and second connecting plate 16 can be electrically conductive material, and when first connecting plate 15 and second connecting plate 16 pressed from both sides tight outside wire and connect, the inner of connecting plate also contacted with the laminating of terminal tip, and the realization is electrically conductive, can avoid outside wire to connect not hard up lead to with the terminal contact failure, and other parts of at this moment wire interface all adopt insulating material like two-way threaded rod, interface lateral wall, knob, rotation axis etc. avoid the kneck electric leakage.

The body 1 comprises a shell 5, a heat dissipation coating 7 is arranged on the outer side surface of the shell 5, an insulating layer 6 is fixedly arranged on the inner side surface of the shell 5, and an anti-static layer 10 is fixedly arranged on the inner side of the insulating layer 6. A cabinet door 2 is arranged on the side wall of one side of the body 1. The body 1 is provided with a rain shelter 3 above the wire interface 4.

The utility model discloses a theory of operation is: opening the cabinet door 2, respectively installing the current transformer 12 and the voltage transformer 14 in the second installation chamber 9 and the first installation chamber 8, closing the cabinet door 2, installing the body 1 on the installation frame, respectively inserting the external lead connectors into the corresponding lead interfaces 4, the rotary knob 18 is rotated to drive the rotary shaft 19, the driving gear 22, the driven gear 20 and the bidirectional threaded rod 21 to rotate in turn, so that the first connecting plate 15 and the second connecting plate 16 move into the mounting cavity 23 and clamp the external lead connector to fix the external lead connector, the external lead connector is connected and electrified with the binding post, the assembly of the device is completed, the rain shielding awning 3 can prevent rainwater from entering the body 1 through the wire interface 4, the heat dissipation coating 7 helps the shell 5 to dissipate heat, the insulating layer 6 can prevent the electric leakage of the device, and the antistatic layer 10 can prevent static electricity from interfering with the device.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A combined mutual inductor for metering comprises a body (1), and is characterized in that: a second mounting chamber (9) is arranged on the upper side in the body (1), and a first mounting chamber (8) is arranged on the lower side of the second mounting chamber (9);

a voltage transformer (14) is fixedly arranged in the first mounting chamber (8), a first wiring terminal (13) is fixedly connected to one side of the voltage transformer (14), one end of the first wiring terminal (13) penetrates through the side wall of the body (1) corresponding to the first mounting chamber (8), and a wire interface (4) correspondingly connected with the first wiring terminal (13) is arranged outside the side wall of the body (1);

the utility model discloses a wire connector, including second installation room (9), second installation room (9) inside fixed current transformer (12) that is equipped with, current transformer (12) one side fixedly connected with second terminal (11), body (1) lateral wall that second installation room (9) correspond is run through to second terminal (11) one end, body (1) lateral wall is equipped with outward and corresponds wire interface (4) of being connected with second terminal (11).

2. A combined instrument transformer for metering according to claim 1, characterized in that: a mounting cavity (23) is formed in the center of the wire interface (4), an opening on the inner side of the mounting cavity (23) corresponds to a corresponding binding post, an opening on the outer side of the mounting cavity (23) is used for inserting a joint of an external wire, a mounting groove (17) is formed in the side wall of the wire interface (4) and located below the mounting cavity (23), a knob (18) is arranged at the bottom of the wire interface (4), a rotating shaft (19) is fixedly connected to the upper portion of the knob (18), the rotating shaft (19) penetrates through the side wall of the bottom of the wire interface (4) and extends into the mounting groove (17), and a driving gear (22) is fixedly connected to the upper end of;

two bidirectional threaded rods (21) are rotatably connected between the upper inner wall and the lower inner wall of the mounting cavity (23), and the rotating directions of the threads of the upper part and the lower part of each bidirectional threaded rod (21) are opposite; the lower threads of the two bidirectional threaded rods (21) are rotatably connected with a second connecting plate (16), the upper threads of the two bidirectional threaded rods (21) are rotatably connected with a first connecting plate (15), and a gap between the two bidirectional threaded rods (21) is used for allowing a joint of an external lead to pass through;

inside the lower extreme of two-way threaded rod (21) extended to mounting groove (17), at two-way threaded rod (21) lower extreme coaxial coupling respectively with driven gear (20), two driven gear (20) are located driving gear (22) both sides respectively, driven gear (20) are connected with driving gear (22) meshing.

3. A combined instrument transformer for metering according to claim 1, characterized in that: the body (1) comprises a shell (5), a heat dissipation coating (7) is arranged on the outer side surface of the shell (5), an insulating layer (6) is fixedly arranged on the inner side surface of the shell (5), and an anti-static layer (10) is fixedly arranged on the inner side of the insulating layer (6).

4. A combined instrument transformer for metering according to claim 1, characterized in that: a cabinet door (2) is arranged on the side wall of one side of the body (1).

5. A combined instrument transformer for metering according to claim 1, characterized in that: the rain shielding awning (3) is arranged on the body (1) and above the wire interface (4).